clang-format all pdfium code.

samples/fx_lpng/lpng_v163/pngpriv.h

 
 /* pngpriv.h - private declarations for use inside libpng
  *
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * Last changed in libpng 1.6.3 [July 18, 2013]
  *
@@ skipping 23 matching lines @@
  *
  * These macros only have an effect if the operating system supports either
  * POSIX 1003.1 or C99, or both.  On other operating systems (particularly
  * Windows/Visual Studio) there is no effect; the OS specific tests below are
  * still required (as of 2011-05-02.)
  */
 #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* Standard library headers not required by png.h: */
-#  include <stdlib.h>
-#  include <string.h>
+#include <stdlib.h>
+#include <string.h>
 #endif
 
 #define PNGLIB_BUILD /*libpng is being built, not used*/
 
 /* If HAVE_CONFIG_H is defined during the build then the build system must
  * provide an appropriate "config.h" file on the include path.  The header file
  * must provide definitions as required below (search for "HAVE_CONFIG_H");
  * see configure.ac for more details of the requirements.  The macro
  * "PNG_NO_CONFIG_H" is provided for maintainers to test for dependencies on
  * 'configure'; define this macro to prevent the configure build including the
  * configure generated config.h.  Libpng is expected to compile without *any*
  * special build system support on a reasonably ANSI-C compliant system.
  */
 #if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
-#  include <config.h>
+#include <config.h>
 
-   /* Pick up the definition of 'restrict' from config.h if it was read: */
-#  define PNG_RESTRICT restrict
+/* Pick up the definition of 'restrict' from config.h if it was read: */
+#define PNG_RESTRICT restrict
 #endif
 
 /* To support symbol prefixing it is necessary to know *before* including png.h
  * whether the fixed point (and maybe other) APIs are exported, because if they
  * are not internal definitions may be required.  This is handled below just
  * before png.h is included, but load the configuration now if it is available.
  */
 #ifndef PNGLCONF_H
-#  include "pnglibconf.h"
+#include "pnglibconf.h"
 #endif
 
 /* Local renames may change non-exported API functions from png.h */
 #if defined(PNG_PREFIX) && !defined(PNGPREFIX_H)
-#  include "pngprefix.h"
+#include "pngprefix.h"
 #endif
 
 #ifdef PNG_USER_CONFIG
-#  include "pngusr.h"
-   /* These should have been defined in pngusr.h */
-#  ifndef PNG_USER_PRIVATEBUILD
-#    define PNG_USER_PRIVATEBUILD "Custom libpng build"
-#  endif
-#  ifndef PNG_USER_DLLFNAME_POSTFIX
-#    define PNG_USER_DLLFNAME_POSTFIX "Cb"
-#  endif
+#include "pngusr.h"
+/* These should have been defined in pngusr.h */
+#ifndef PNG_USER_PRIVATEBUILD
+#define PNG_USER_PRIVATEBUILD "Custom libpng build"
+#endif
+#ifndef PNG_USER_DLLFNAME_POSTFIX
+#define PNG_USER_DLLFNAME_POSTFIX "Cb"
+#endif
 #endif
 
 /* Compile time options.
  * =====================
  * In a multi-arch build the compiler may compile the code several times for the
  * same object module, producing different binaries for different architectures.
  * When this happens configure-time setting of the target host options cannot be
  * done and this interferes with the handling of the ARM NEON optimizations, and
  * possibly other similar optimizations.  Put additional tests here; in general
  * this is needed when the same option can be changed at both compile time and
@@ skipping 13 matching lines @@
  * so we should never try to reference it.
  */
 #if 0
 #ifndef PNG_ARM_NEON_OPT
    /* ARM NEON optimizations are being controlled by the compiler settings,
     * typically the target FPU.  If the FPU has been set to NEON (-mfpu=neon
     * with GCC) then the compiler will define __ARM_NEON__ and we can rely
     * unconditionally on NEON instructions not crashing, otherwise we must
     * disable use of NEON instructions:
     */
-#  ifdef __ARM_NEON__
-#     define PNG_ARM_NEON_OPT 2
-#  else
-#     define PNG_ARM_NEON_OPT 0
-#  endif
+#ifdef __ARM_NEON__
+#define PNG_ARM_NEON_OPT 2
+#else
+#define PNG_ARM_NEON_OPT 0
+#endif
 #endif
 
 #if PNG_ARM_NEON_OPT > 0
    /* NEON optimizations are to be at least considered by libpng, so enable the
     * callbacks to do this.
     */
-#  define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon
+#define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_neon
 #endif
 #endif
 
 /* Is this a build of a DLL where compilation of the object modules requires
  * different preprocessor settings to those required for a simple library?  If
  * so PNG_BUILD_DLL must be set.
  *
  * If libpng is used inside a DLL but that DLL does not export the libpng APIs
  * PNG_BUILD_DLL must not be set.  To avoid the code below kicking in build a
  * static library of libpng then link the DLL against that.
  */
 #ifndef PNG_BUILD_DLL
-#  ifdef DLL_EXPORT
-      /* This is set by libtool when files are compiled for a DLL; libtool
-       * always compiles twice, even on systems where it isn't necessary.  Set
-       * PNG_BUILD_DLL in case it is necessary:
-       */
-#     define PNG_BUILD_DLL
-#  else
-#     ifdef _WINDLL
-         /* This is set by the Microsoft Visual Studio IDE in projects that
-          * build a DLL.  It can't easily be removed from those projects (it
-          * isn't visible in the Visual Studio UI) so it is a fairly reliable
-          * indication that PNG_IMPEXP needs to be set to the DLL export
-          * attributes.
-          */
-#        define PNG_BUILD_DLL
-#     else
-#        ifdef __DLL__
-            /* This is set by the Borland C system when compiling for a DLL
-             * (as above.)
-             */
-#           define PNG_BUILD_DLL
-#        else
-            /* Add additional compiler cases here. */
-#        endif
-#     endif
-#  endif
+#ifdef DLL_EXPORT
+/* This is set by libtool when files are compiled for a DLL; libtool
+ * always compiles twice, even on systems where it isn't necessary.  Set
+ * PNG_BUILD_DLL in case it is necessary:
+ */
+#define PNG_BUILD_DLL
+#else
+#ifdef _WINDLL
+/* This is set by the Microsoft Visual Studio IDE in projects that
+ * build a DLL.  It can't easily be removed from those projects (it
+ * isn't visible in the Visual Studio UI) so it is a fairly reliable
+ * indication that PNG_IMPEXP needs to be set to the DLL export
+ * attributes.
+ */
+#define PNG_BUILD_DLL
+#else
+#ifdef __DLL__
+/* This is set by the Borland C system when compiling for a DLL
+ * (as above.)
+ */
+#define PNG_BUILD_DLL
+#else
+/* Add additional compiler cases here. */
+#endif
+#endif
+#endif
 #endif /* Setting PNG_BUILD_DLL if required */
 
 /* See pngconf.h for more details: the builder of the library may set this on
  * the command line to the right thing for the specific compilation system or it
  * may be automagically set above (at present we know of no system where it does
  * need to be set on the command line.)
  *
  * PNG_IMPEXP must be set here when building the library to prevent pngconf.h
  * setting it to the "import" setting for a DLL build.
  */
 #ifndef PNG_IMPEXP
-#  ifdef PNG_BUILD_DLL
-#     define PNG_IMPEXP PNG_DLL_EXPORT
-#  else
-      /* Not building a DLL, or the DLL doesn't require specific export
-       * definitions.
-       */
-#     define PNG_IMPEXP
-#  endif
+#ifdef PNG_BUILD_DLL
+#define PNG_IMPEXP PNG_DLL_EXPORT
+#else
+/* Not building a DLL, or the DLL doesn't require specific export
+ * definitions.
+ */
+#define PNG_IMPEXP
+#endif
 #endif
 
 /* No warnings for private or deprecated functions in the build: */
 #ifndef PNG_DEPRECATED
-#  define PNG_DEPRECATED
+#define PNG_DEPRECATED
 #endif
 #ifndef PNG_PRIVATE
-#  define PNG_PRIVATE
+#define PNG_PRIVATE
 #endif
 
 /* Symbol preprocessing support.
  *
  * To enable listing global, but internal, symbols the following macros should
  * always be used to declare an extern data or function object in this file.
  */
 #ifndef PNG_INTERNAL_DATA
-#  define PNG_INTERNAL_DATA(type, name, array) extern type name array
+#define PNG_INTERNAL_DATA(type, name, array) extern type name array
 #endif
 
 #ifndef PNG_INTERNAL_FUNCTION
-#  define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\
-      extern PNG_FUNCTION(type, name, args, PNG_EMPTY attributes)
+#define PNG_INTERNAL_FUNCTION(type, name, args, attributes) \
+  extern PNG_FUNCTION(type, name, args, PNG_EMPTY attributes)
 #endif
 
 /* If floating or fixed point APIs are disabled they may still be compiled
  * internally.  To handle this make sure they are declared as the appropriate
  * internal extern function (otherwise the symbol prefixing stuff won't work and
  * the functions will be used without definitions.)
  *
  * NOTE: although all the API functions are declared here they are not all
  * actually built!  Because the declarations are still made it is necessary to
  * fake out types that they depend on.
  */
 #ifndef PNG_FP_EXPORT
-#  ifndef PNG_FLOATING_POINT_SUPPORTED
-#     define PNG_FP_EXPORT(ordinal, type, name, args)\
-         PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY);
-#     ifndef PNG_VERSION_INFO_ONLY
-         typedef struct png_incomplete png_double;
-         typedef png_double*           png_doublep;
-         typedef const png_double*     png_const_doublep;
-         typedef png_double**          png_doublepp;
-#     endif
-#  endif
+#ifndef PNG_FLOATING_POINT_SUPPORTED
+#define PNG_FP_EXPORT(ordinal, type, name, args) \
+  PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY);
+#ifndef PNG_VERSION_INFO_ONLY
+typedef struct png_incomplete png_double;
+typedef png_double* png_doublep;
+typedef const png_double* png_const_doublep;
+typedef png_double** png_doublepp;
+#endif
+#endif
 #endif
 #ifndef PNG_FIXED_EXPORT
-#  ifndef PNG_FIXED_POINT_SUPPORTED
-#     define PNG_FIXED_EXPORT(ordinal, type, name, args)\
-         PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY);
-#  endif
+#ifndef PNG_FIXED_POINT_SUPPORTED
+#define PNG_FIXED_EXPORT(ordinal, type, name, args) \
+  PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY);
+#endif
 #endif
 
 #include "png.h"
 
 /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */
 #ifndef PNG_DLL_EXPORT
-#  define PNG_DLL_EXPORT
+#define PNG_DLL_EXPORT
 #endif
 
 /* SECURITY and SAFETY:
  *
  * By default libpng is built without any internal limits on image size,
  * individual heap (png_malloc) allocations or the total amount of memory used.
  * If PNG_SAFE_LIMITS_SUPPORTED is defined, however, the limits below are used
  * (unless individually overridden).  These limits are believed to be fairly
  * safe, but builders of secure systems should verify the values against the
  * real system capabilities.
  */
 #ifdef PNG_SAFE_LIMITS_SUPPORTED
-   /* 'safe' limits */
-#  ifndef PNG_USER_WIDTH_MAX
-#     define PNG_USER_WIDTH_MAX 1000000
-#  endif
-#  ifndef PNG_USER_HEIGHT_MAX
-#     define PNG_USER_HEIGHT_MAX 1000000
-#  endif
-#  ifndef PNG_USER_CHUNK_CACHE_MAX
-#     define PNG_USER_CHUNK_CACHE_MAX 128
-#  endif
-#  ifndef PNG_USER_CHUNK_MALLOC_MAX
-#     define PNG_USER_CHUNK_MALLOC_MAX 8000000
-#  endif
+/* 'safe' limits */
+#ifndef PNG_USER_WIDTH_MAX
+#define PNG_USER_WIDTH_MAX 1000000
+#endif
+#ifndef PNG_USER_HEIGHT_MAX
+#define PNG_USER_HEIGHT_MAX 1000000
+#endif
+#ifndef PNG_USER_CHUNK_CACHE_MAX
+#define PNG_USER_CHUNK_CACHE_MAX 128
+#endif
+#ifndef PNG_USER_CHUNK_MALLOC_MAX
+#define PNG_USER_CHUNK_MALLOC_MAX 8000000
+#endif
 #else
-   /* values for no limits */
-#  ifndef PNG_USER_WIDTH_MAX
-#     define PNG_USER_WIDTH_MAX 0x7fffffff
-#  endif
-#  ifndef PNG_USER_HEIGHT_MAX
-#     define PNG_USER_HEIGHT_MAX 0x7fffffff
-#  endif
-#  ifndef PNG_USER_CHUNK_CACHE_MAX
-#     define PNG_USER_CHUNK_CACHE_MAX 0
-#  endif
-#  ifndef PNG_USER_CHUNK_MALLOC_MAX
-#     define PNG_USER_CHUNK_MALLOC_MAX 0
-#  endif
+/* values for no limits */
+#ifndef PNG_USER_WIDTH_MAX
+#define PNG_USER_WIDTH_MAX 0x7fffffff
+#endif
+#ifndef PNG_USER_HEIGHT_MAX
+#define PNG_USER_HEIGHT_MAX 0x7fffffff
+#endif
+#ifndef PNG_USER_CHUNK_CACHE_MAX
+#define PNG_USER_CHUNK_CACHE_MAX 0
+#endif
+#ifndef PNG_USER_CHUNK_MALLOC_MAX
+#define PNG_USER_CHUNK_MALLOC_MAX 0
+#endif
 #endif
 
 /* Moved to pngpriv.h at libpng-1.5.0 */
 /* NOTE: some of these may have been used in external applications as
  * these definitions were exposed in pngconf.h prior to 1.5.
  */
 
 /* If you are running on a machine where you cannot allocate more
  * than 64K of memory at once, uncomment this.  While libpng will not
  * normally need that much memory in a chunk (unless you load up a very
  * large file), zlib needs to know how big of a chunk it can use, and
  * libpng thus makes sure to check any memory allocation to verify it
  * will fit into memory.
  *
  * zlib provides 'MAXSEG_64K' which, if defined, indicates the
  * same limit and pngconf.h (already included) sets the limit
  * if certain operating systems are detected.
  */
 #if defined(MAXSEG_64K) && !defined(PNG_MAX_MALLOC_64K)
-#  define PNG_MAX_MALLOC_64K
+#define PNG_MAX_MALLOC_64K
 #endif
 
 #ifndef PNG_UNUSED
 /* Unused formal parameter warnings are silenced using the following macro
  * which is expected to have no bad effects on performance (optimizing
  * compilers will probably remove it entirely).  Note that if you replace
  * it with something other than whitespace, you must include the terminating
  * semicolon.
  */
-#  define PNG_UNUSED(param) (void)param;
+#define PNG_UNUSED(param) (void) param;
 #endif
 
 /* Just a little check that someone hasn't tried to define something
  * contradictory.
  */
 #if (PNG_ZBUF_SIZE > 65536L) && defined(PNG_MAX_MALLOC_64K)
-#  undef PNG_ZBUF_SIZE
-#  define PNG_ZBUF_SIZE 65536L
+#undef PNG_ZBUF_SIZE
+#define PNG_ZBUF_SIZE 65536L
 #endif
 
 /* If warnings or errors are turned off the code is disabled or redirected here.
  * From 1.5.4 functions have been added to allow very limited formatting of
  * error and warning messages - this code will also be disabled here.
  */
 #ifdef PNG_WARNINGS_SUPPORTED
-#  define PNG_WARNING_PARAMETERS(p) png_warning_parameters p;
+#define PNG_WARNING_PARAMETERS(p) png_warning_parameters p;
 #else
-#  define png_warning(s1,s2) ((void)(s1))
-#  define png_chunk_warning(s1,s2) ((void)(s1))
-#  define png_warning_parameter(p,number,string) ((void)0)
-#  define png_warning_parameter_unsigned(p,number,format,value) ((void)0)
-#  define png_warning_parameter_signed(p,number,format,value) ((void)0)
-#  define png_formatted_warning(pp,p,message) ((void)(pp))
-#  define PNG_WARNING_PARAMETERS(p)
+#define png_warning(s1, s2) ((void)(s1))
+#define png_chunk_warning(s1, s2) ((void)(s1))
+#define png_warning_parameter(p, number, string) ((void)0)
+#define png_warning_parameter_unsigned(p, number, format, value) ((void)0)
+#define png_warning_parameter_signed(p, number, format, value) ((void)0)
+#define png_formatted_warning(pp, p, message) ((void)(pp))
+#define PNG_WARNING_PARAMETERS(p)
 #endif
 #ifndef PNG_ERROR_TEXT_SUPPORTED
-#  define png_error(s1,s2) png_err(s1)
-#  define png_chunk_error(s1,s2) png_err(s1)
-#  define png_fixed_error(s1,s2) png_err(s1)
+#define png_error(s1, s2) png_err(s1)
+#define png_chunk_error(s1, s2) png_err(s1)
+#define png_fixed_error(s1, s2) png_err(s1)
 #endif
 
 /* C allows up-casts from (void*) to any pointer and (const void*) to any
  * pointer to a const object.  C++ regards this as a type error and requires an
  * explicit, static, cast and provides the static_cast<> rune to ensure that
  * const is not cast away.
  */
 #ifdef __cplusplus
-#  define png_voidcast(type, value) static_cast<type>(value)
-#  define png_constcast(type, value) const_cast<type>(value)
-#  define png_aligncast(type, value) \
-   static_cast<type>(static_cast<void*>(value))
-#  define png_aligncastconst(type, value) \
-   static_cast<type>(static_cast<const void*>(value))
+#define png_voidcast(type, value) static_cast<type>(value)
+#define png_constcast(type, value) const_cast<type>(value)
+#define png_aligncast(type, value) static_cast<type>(static_cast<void*>(value))
+#define png_aligncastconst(type, value) \
+  static_cast<type>(static_cast<const void*>(value))
 #else
-#  define png_voidcast(type, value) (value)
-#  define png_constcast(type, value) ((type)(value))
-#  define png_aligncast(type, value) ((void*)(value))
-#  define png_aligncastconst(type, value) ((const void*)(value))
+#define png_voidcast(type, value) (value)
+#define png_constcast(type, value) ((type)(value))
+#define png_aligncast(type, value) ((void*)(value))
+#define png_aligncastconst(type, value) ((const void*)(value))
 #endif /* __cplusplus */
 
 /* Some fixed point APIs are still required even if not exported because
  * they get used by the corresponding floating point APIs.  This magic
  * deals with this:
  */
 #ifdef PNG_FIXED_POINT_SUPPORTED
-#  define PNGFAPI PNGAPI
+#define PNGFAPI PNGAPI
 #else
-#  define PNGFAPI /* PRIVATE */
+#define PNGFAPI /* PRIVATE */
 #endif
 
 #ifndef PNG_VERSION_INFO_ONLY
 /* Other defines specific to compilers can go here.  Try to keep
  * them inside an appropriate ifdef/endif pair for portability.
  */
-#if defined(PNG_FLOATING_POINT_SUPPORTED) ||\
+#if defined(PNG_FLOATING_POINT_SUPPORTED) || \
     defined(PNG_FLOATING_ARITHMETIC_SUPPORTED)
-   /* png.c requires the following ANSI-C constants if the conversion of
-    * floating point to ASCII is implemented therein:
-    *
-    *  DBL_DIG  Maximum number of decimal digits (can be set to any constant)
-    *  DBL_MIN  Smallest normalized fp number (can be set to an arbitrary value)
-    *  DBL_MAX  Maximum floating point number (can be set to an arbitrary value)
-    */
-#  include <float.h>
+/* png.c requires the following ANSI-C constants if the conversion of
+ * floating point to ASCII is implemented therein:
+ *
+ *  DBL_DIG  Maximum number of decimal digits (can be set to any constant)
+ *  DBL_MIN  Smallest normalized fp number (can be set to an arbitrary value)
+ *  DBL_MAX  Maximum floating point number (can be set to an arbitrary value)
+ */
+#include <float.h>
 
-#  if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
+#if (defined(__MWERKS__) && defined(macintosh)) || defined(applec) || \
     defined(THINK_C) || defined(__SC__) || defined(TARGET_OS_MAC)
-     /* We need to check that <math.h> hasn't already been included earlier
-      * as it seems it doesn't agree with <fp.h>, yet we should really use
-      * <fp.h> if possible.
-      */
-#    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
-#      include <fp.h>
-#    endif
-#  else
-#    include <math.h>
-#  endif
-#  if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
-     /* Amiga SAS/C: We must include builtin FPU functions when compiling using
-      * MATH=68881
-      */
-#    include <m68881.h>
-#  endif
+/* We need to check that <math.h> hasn't already been included earlier
+ * as it seems it doesn't agree with <fp.h>, yet we should really use
+ * <fp.h> if possible.
+ */
+#if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
+#include <fp.h>
+#endif
+#else
+#include <math.h>
+#endif
+#if defined(_AMIGA) && defined(__SASC) && defined(_M68881)
+/* Amiga SAS/C: We must include builtin FPU functions when compiling using
+ * MATH=68881
+ */
+#include <m68881.h>
+#endif
 #endif
 
 /* This provides the non-ANSI (far) memory allocation routines. */
 #if defined(__TURBOC__) && defined(__MSDOS__)
-#  include <mem.h>
-#  include <alloc.h>
+#include <mem.h>
+#include <alloc.h>
 #endif
 
 #if defined(WIN32) || defined(_Windows) || defined(_WINDOWS) || \
     defined(_WIN32) || defined(__WIN32__)
-#  include <windows.h>  /* defines _WINDOWS_ macro */
+#include <windows.h> /* defines _WINDOWS_ macro */
 #endif
 #endif /* PNG_VERSION_INFO_ONLY */
 
 /* Moved here around 1.5.0beta36 from pngconf.h */
 /* Users may want to use these so they are not private.  Any library
  * functions that are passed far data must be model-independent.
  */
 
 /* Memory model/platform independent fns */
 #ifndef PNG_ABORT
-#  ifdef _WINDOWS_
-#    define PNG_ABORT() ExitProcess(0)
-#  else
-#    define PNG_ABORT() abort()
-#  endif
+#ifdef _WINDOWS_
+#define PNG_ABORT() ExitProcess(0)
+#else
+#define PNG_ABORT() abort()
+#endif
 #endif
 
 /* These macros may need to be architecture dependent. */
-#define PNG_ALIGN_NONE   0 /* do not use data alignment */
+#define PNG_ALIGN_NONE 0   /* do not use data alignment */
 #define PNG_ALIGN_ALWAYS 1 /* assume unaligned accesses are OK */
 #ifdef offsetof
-#  define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */
+#define PNG_ALIGN_OFFSET 2 /* use offsetof to determine alignment */
 #else
-#  define PNG_ALIGN_OFFSET -1 /* prevent the use of this */
+#define PNG_ALIGN_OFFSET -1 /* prevent the use of this */
 #endif
-#define PNG_ALIGN_SIZE   3 /* use sizeof to determine alignment */
+#define PNG_ALIGN_SIZE 3 /* use sizeof to determine alignment */
 
 #ifndef PNG_ALIGN_TYPE
-   /* Default to using aligned access optimizations and requiring alignment to a
-    * multiple of the data type size.  Override in a compiler specific fashion
-    * if necessary by inserting tests here:
-    */
-#  define PNG_ALIGN_TYPE PNG_ALIGN_SIZE
+/* Default to using aligned access optimizations and requiring alignment to a
+ * multiple of the data type size.  Override in a compiler specific fashion
+ * if necessary by inserting tests here:
+ */
+#define PNG_ALIGN_TYPE PNG_ALIGN_SIZE
 #endif
 
 #if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
-   /* This is used because in some compiler implementations non-aligned
-    * structure members are supported, so the offsetof approach below fails.
-    * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
-    * is good for performance.  Do not do this unless you have tested the result
-    * and understand it.
-    */
-#  define png_alignof(type) (sizeof (type))
+/* This is used because in some compiler implementations non-aligned
+ * structure members are supported, so the offsetof approach below fails.
+ * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
+ * is good for performance.  Do not do this unless you have tested the result
+ * and understand it.
+ */
+#define png_alignof(type) (sizeof(type))
 #else
-#  if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET
-#     define png_alignof(type) offsetof(struct{char c; type t;}, t)
-#  else
-#     if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS
-#        define png_alignof(type) (1)
-#     endif
-      /* Else leave png_alignof undefined to prevent use thereof */
-#  endif
+#if PNG_ALIGN_TYPE == PNG_ALIGN_OFFSET
+#define png_alignof(type) \
+  offsetof(struct {       \
+    char c;               \
+    type t;               \
+  }, t)
+#else
+#if PNG_ALIGN_TYPE == PNG_ALIGN_ALWAYS
+#define png_alignof(type) (1)
+#endif
+/* Else leave png_alignof undefined to prevent use thereof */
+#endif
 #endif
 
 /* This implicitly assumes alignment is always to a power of 2. */
 #ifdef png_alignof
-#  define png_isaligned(ptr, type)\
-   ((((const char*)ptr-(const char*)0) & (png_alignof(type)-1)) == 0)
+#define png_isaligned(ptr, type) \
+  ((((const char*)ptr - (const char*)0) & (png_alignof(type) - 1)) == 0)
 #else
-#  define png_isaligned(ptr, type) 0
+#define png_isaligned(ptr, type) 0
 #endif
 
 /* End of memory model/platform independent support */
 /* End of 1.5.0beta36 move from pngconf.h */
 
 /* CONSTANTS and UTILITY MACROS
  * These are used internally by libpng and not exposed in the API
  */
 
 /* Various modes of operation.  Note that after an init, mode is set to
  * zero automatically when the structure is created.  Three of these
  * are defined in png.h because they need to be visible to applications
  * that call png_set_unknown_chunk().
  */
 /* #define PNG_HAVE_IHDR            0x01 (defined in png.h) */
 /* #define PNG_HAVE_PLTE            0x02 (defined in png.h) */
-#define PNG_HAVE_IDAT               0x04
+#define PNG_HAVE_IDAT 0x04
 /* #define PNG_AFTER_IDAT           0x08 (defined in png.h) */
-#define PNG_HAVE_IEND               0x10
-                   /*               0x20 (unused) */
-                   /*               0x40 (unused) */
-                   /*               0x80 (unused) */
-#define PNG_HAVE_CHUNK_HEADER      0x100
-#define PNG_WROTE_tIME             0x200
+#define PNG_HAVE_IEND 0x10
+/*               0x20 (unused) */
+/*               0x40 (unused) */
+/*               0x80 (unused) */
+#define PNG_HAVE_CHUNK_HEADER 0x100
+#define PNG_WROTE_tIME 0x200
 #define PNG_WROTE_INFO_BEFORE_PLTE 0x400
-#define PNG_BACKGROUND_IS_GRAY     0x800
-#define PNG_HAVE_PNG_SIGNATURE    0x1000
+#define PNG_BACKGROUND_IS_GRAY 0x800
+#define PNG_HAVE_PNG_SIGNATURE 0x1000
 #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
-                   /*             0x4000 (unused) */
-#define PNG_IS_READ_STRUCT        0x8000 /* Else is a write struct */
+                                         /*             0x4000 (unused) */
+#define PNG_IS_READ_STRUCT 0x8000        /* Else is a write struct */
 
 /* Flags for the transformations the PNG library does on the image data */
-#define PNG_BGR                 0x0001
-#define PNG_INTERLACE           0x0002
-#define PNG_PACK                0x0004
-#define PNG_SHIFT               0x0008
-#define PNG_SWAP_BYTES          0x0010
-#define PNG_INVERT_MONO         0x0020
-#define PNG_QUANTIZE            0x0040
-#define PNG_COMPOSE             0x0080     /* Was PNG_BACKGROUND */
-#define PNG_BACKGROUND_EXPAND   0x0100
-#define PNG_EXPAND_16           0x0200     /* Added to libpng 1.5.2 */
-#define PNG_16_TO_8             0x0400     /* Becomes 'chop' in 1.5.4 */
-#define PNG_RGBA                0x0800
-#define PNG_EXPAND              0x1000
-#define PNG_GAMMA               0x2000
-#define PNG_GRAY_TO_RGB         0x4000
-#define PNG_FILLER              0x8000
-#define PNG_PACKSWAP           0x10000
-#define PNG_SWAP_ALPHA         0x20000
-#define PNG_STRIP_ALPHA        0x40000
-#define PNG_INVERT_ALPHA       0x80000
-#define PNG_USER_TRANSFORM    0x100000
-#define PNG_RGB_TO_GRAY_ERR   0x200000
-#define PNG_RGB_TO_GRAY_WARN  0x400000
-#define PNG_RGB_TO_GRAY       0x600000 /* two bits, RGB_TO_GRAY_ERR|WARN */
-#define PNG_ENCODE_ALPHA      0x800000 /* Added to libpng-1.5.4 */
-#define PNG_ADD_ALPHA         0x1000000 /* Added to libpng-1.2.7 */
-#define PNG_EXPAND_tRNS       0x2000000 /* Added to libpng-1.2.9 */
-#define PNG_SCALE_16_TO_8     0x4000000 /* Added to libpng-1.5.4 */
-                       /*   0x8000000 unused */
-                       /*  0x10000000 unused */
-                       /*  0x20000000 unused */
-                       /*  0x40000000 unused */
+#define PNG_BGR 0x0001
+#define PNG_INTERLACE 0x0002
+#define PNG_PACK 0x0004
+#define PNG_SHIFT 0x0008
+#define PNG_SWAP_BYTES 0x0010
+#define PNG_INVERT_MONO 0x0020
+#define PNG_QUANTIZE 0x0040
+#define PNG_COMPOSE 0x0080 /* Was PNG_BACKGROUND */
+#define PNG_BACKGROUND_EXPAND 0x0100
+#define PNG_EXPAND_16 0x0200 /* Added to libpng 1.5.2 */
+#define PNG_16_TO_8 0x0400   /* Becomes 'chop' in 1.5.4 */
+#define PNG_RGBA 0x0800
+#define PNG_EXPAND 0x1000
+#define PNG_GAMMA 0x2000
+#define PNG_GRAY_TO_RGB 0x4000
+#define PNG_FILLER 0x8000
+#define PNG_PACKSWAP 0x10000
+#define PNG_SWAP_ALPHA 0x20000
+#define PNG_STRIP_ALPHA 0x40000
+#define PNG_INVERT_ALPHA 0x80000
+#define PNG_USER_TRANSFORM 0x100000
+#define PNG_RGB_TO_GRAY_ERR 0x200000
+#define PNG_RGB_TO_GRAY_WARN 0x400000
+#define PNG_RGB_TO_GRAY 0x600000    /* two bits, RGB_TO_GRAY_ERR|WARN */
+#define PNG_ENCODE_ALPHA 0x800000   /* Added to libpng-1.5.4 */
+#define PNG_ADD_ALPHA 0x1000000     /* Added to libpng-1.2.7 */
+#define PNG_EXPAND_tRNS 0x2000000   /* Added to libpng-1.2.9 */
+#define PNG_SCALE_16_TO_8 0x4000000 /* Added to libpng-1.5.4 */
+                                    /*   0x8000000 unused */
+                                    /*  0x10000000 unused */
+                                    /*  0x20000000 unused */
+                                    /*  0x40000000 unused */
 /* Flags for png_create_struct */
-#define PNG_STRUCT_PNG   0x0001
-#define PNG_STRUCT_INFO  0x0002
+#define PNG_STRUCT_PNG 0x0001
+#define PNG_STRUCT_INFO 0x0002
 
 /* Scaling factor for filter heuristic weighting calculations */
-#define PNG_WEIGHT_FACTOR (1<<(PNG_WEIGHT_SHIFT))
-#define PNG_COST_FACTOR (1<<(PNG_COST_SHIFT))
+#define PNG_WEIGHT_FACTOR (1 << (PNG_WEIGHT_SHIFT))
+#define PNG_COST_FACTOR (1 << (PNG_COST_SHIFT))
 
 /* Flags for the png_ptr->flags rather than declaring a byte for each one */
-#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY     0x0001
-#define PNG_FLAG_ZSTREAM_INITIALIZED      0x0002 /* Added to libpng-1.6.0 */
-                                  /*      0x0004    unused */
-#define PNG_FLAG_ZSTREAM_ENDED            0x0008 /* Added to libpng-1.6.0 */
-                                  /*      0x0010    unused */
-                                  /*      0x0020    unused */
-#define PNG_FLAG_ROW_INIT                 0x0040
-#define PNG_FLAG_FILLER_AFTER             0x0080
-#define PNG_FLAG_CRC_ANCILLARY_USE        0x0100
-#define PNG_FLAG_CRC_ANCILLARY_NOWARN     0x0200
-#define PNG_FLAG_CRC_CRITICAL_USE         0x0400
-#define PNG_FLAG_CRC_CRITICAL_IGNORE      0x0800
-#define PNG_FLAG_ASSUME_sRGB              0x1000 /* Added to libpng-1.5.4 */
-#define PNG_FLAG_OPTIMIZE_ALPHA           0x2000 /* Added to libpng-1.5.4 */
-#define PNG_FLAG_DETECT_UNINITIALIZED     0x4000 /* Added to libpng-1.5.4 */
+#define PNG_FLAG_ZLIB_CUSTOM_STRATEGY 0x0001
+#define PNG_FLAG_ZSTREAM_INITIALIZED 0x0002 /* Added to libpng-1.6.0 */
+                                            /*      0x0004    unused */
+#define PNG_FLAG_ZSTREAM_ENDED 0x0008       /* Added to libpng-1.6.0 */
+                                            /*      0x0010    unused */
+                                            /*      0x0020    unused */
+#define PNG_FLAG_ROW_INIT 0x0040
+#define PNG_FLAG_FILLER_AFTER 0x0080
+#define PNG_FLAG_CRC_ANCILLARY_USE 0x0100
+#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
+#define PNG_FLAG_CRC_CRITICAL_USE 0x0400
+#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
+#define PNG_FLAG_ASSUME_sRGB 0x1000          /* Added to libpng-1.5.4 */
+#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000       /* Added to libpng-1.5.4 */
+#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */
 /* #define PNG_FLAG_KEEP_UNKNOWN_CHUNKS      0x8000 */
 /* #define PNG_FLAG_KEEP_UNSAFE_CHUNKS      0x10000 */
-#define PNG_FLAG_LIBRARY_MISMATCH        0x20000
-#define PNG_FLAG_STRIP_ERROR_NUMBERS     0x40000
-#define PNG_FLAG_STRIP_ERROR_TEXT        0x80000
-#define PNG_FLAG_BENIGN_ERRORS_WARN     0x100000 /* Added to libpng-1.4.0 */
-#define PNG_FLAG_APP_WARNINGS_WARN      0x200000 /* Added to libpng-1.6.0 */
-#define PNG_FLAG_APP_ERRORS_WARN        0x400000 /* Added to libpng-1.6.0 */
-                                  /*    0x800000    unused */
-                                  /*   0x1000000    unused */
-                                  /*   0x2000000    unused */
-                                  /*   0x4000000    unused */
-                                  /*   0x8000000    unused */
-                                  /*  0x10000000    unused */
-                                  /*  0x20000000    unused */
-                                  /*  0x40000000    unused */
+#define PNG_FLAG_LIBRARY_MISMATCH 0x20000
+#define PNG_FLAG_STRIP_ERROR_NUMBERS 0x40000
+#define PNG_FLAG_STRIP_ERROR_TEXT 0x80000
+#define PNG_FLAG_BENIGN_ERRORS_WARN 0x100000 /* Added to libpng-1.4.0 */
+#define PNG_FLAG_APP_WARNINGS_WARN 0x200000  /* Added to libpng-1.6.0 */
+#define PNG_FLAG_APP_ERRORS_WARN 0x400000    /* Added to libpng-1.6.0 */
+                                             /*    0x800000    unused */
+                                             /*   0x1000000    unused */
+                                             /*   0x2000000    unused */
+                                             /*   0x4000000    unused */
+                                             /*   0x8000000    unused */
+                                             /*  0x10000000    unused */
+                                             /*  0x20000000    unused */
+                                             /*  0x40000000    unused */
 
-#define PNG_FLAG_CRC_ANCILLARY_MASK (PNG_FLAG_CRC_ANCILLARY_USE | \
-                                     PNG_FLAG_CRC_ANCILLARY_NOWARN)
+#define PNG_FLAG_CRC_ANCILLARY_MASK \
+  (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)
 
-#define PNG_FLAG_CRC_CRITICAL_MASK  (PNG_FLAG_CRC_CRITICAL_USE | \
-                                     PNG_FLAG_CRC_CRITICAL_IGNORE)
+#define PNG_FLAG_CRC_CRITICAL_MASK \
+  (PNG_FLAG_CRC_CRITICAL_USE | PNG_FLAG_CRC_CRITICAL_IGNORE)
 
-#define PNG_FLAG_CRC_MASK           (PNG_FLAG_CRC_ANCILLARY_MASK | \
-                                     PNG_FLAG_CRC_CRITICAL_MASK)
+#define PNG_FLAG_CRC_MASK \
+  (PNG_FLAG_CRC_ANCILLARY_MASK | PNG_FLAG_CRC_CRITICAL_MASK)
 
 /* Save typing and make code easier to understand */
 
-#define PNG_COLOR_DIST(c1, c2) (abs((int)((c1).red) - (int)((c2).red)) + \
+#define PNG_COLOR_DIST(c1, c2)                  \
+  (abs((int)((c1).red) - (int)((c2).red)) +     \
    abs((int)((c1).green) - (int)((c2).green)) + \
    abs((int)((c1).blue) - (int)((c2).blue)))
 
 /* Added to libpng-1.6.0: scale a 16-bit value in the range 0..65535 to 0..255
  * by dividing by 257 *with rounding*.  This macro is exact for the given range.
  * See the discourse in pngrtran.c png_do_scale_16_to_8.  The values in the
  * macro were established by experiment (modifying the added value).  The macro
  * has a second variant that takes a value already scaled by 255 and divides by
  * 65535 - this has a maximum error of .502.  Over the range 0..65535*65535 it
  * only gives off-by-one errors and only for 0.5% (1 in 200) of the values.
  */
 #define PNG_DIV65535(v24) (((v24) + 32895) >> 16)
-#define PNG_DIV257(v16) PNG_DIV65535((png_uint_32)(v16) * 255)
+#define PNG_DIV257(v16) PNG_DIV65535((png_uint_32)(v16)*255)
 
 /* Added to libpng-1.2.6 JB */
-#define PNG_ROWBYTES(pixel_bits, width) \
-    ((pixel_bits) >= 8 ? \
-    ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) : \
-    (( ((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3) )
+#define PNG_ROWBYTES(pixel_bits, width)                            \
+  ((pixel_bits) >= 8                                               \
+       ? ((png_size_t)(width) * (((png_size_t)(pixel_bits)) >> 3)) \
+       : ((((png_size_t)(width) * ((png_size_t)(pixel_bits))) + 7) >> 3))
 
 /* PNG_OUT_OF_RANGE returns true if value is outside the range
  * ideal-delta..ideal+delta.  Each argument is evaluated twice.
  * "ideal" and "delta" should be constants, normally simple
  * integers, "value" a variable. Added to libpng-1.2.6 JB
  */
 #define PNG_OUT_OF_RANGE(value, ideal, delta) \
-   ( (value) < (ideal)-(delta) || (value) > (ideal)+(delta) )
+  ((value) < (ideal) - (delta) || (value) > (ideal) + (delta))
 
 /* Conversions between fixed and floating point, only defined if
  * required (to make sure the code doesn't accidentally use float
  * when it is supposedly disabled.)
  */
 #ifdef PNG_FLOATING_POINT_SUPPORTED
 /* The floating point conversion can't overflow, though it can and
  * does lose accuracy relative to the original fixed point value.
  * In practice this doesn't matter because png_fixed_point only
  * stores numbers with very low precision.  The png_ptr and s
@@ skipping 12 matching lines @@
  *
  * NOTE: this macro will raise a png_error if the range check fails,
  * therefore it is normally only appropriate to use this on values
  * that come from API calls or other sources where an out of range
  * error indicates a programming error, not a data error!
  *
  * NOTE: by default this is off - the macro is not used - because the
  * function call saves a lot of code.
  */
 #ifdef PNG_FIXED_POINT_MACRO_SUPPORTED
-#define png_fixed(png_ptr, fp, s) ((fp) <= 21474 && (fp) >= -21474 ?\
-    ((png_fixed_point)(100000 * (fp))) : (png_fixed_error(png_ptr, s),0))
+#define png_fixed(png_ptr, fp, s)                                       \
+  ((fp) <= 21474 && (fp) >= -21474 ? ((png_fixed_point)(100000 * (fp))) \
+                                   : (png_fixed_error(png_ptr, s), 0))
 #endif
 /* else the corresponding function is defined below, inside the scope of the
  * cplusplus test.
  */
 #endif
 
 /* Constants for known chunk types.  If you need to add a chunk, define the name
  * here.  For historical reasons these constants have the form png_<name>; i.e.
  * the prefix is lower case.  Please use decimal values as the parameters to
  * match the ISO PNG specification and to avoid relying on the C locale
  * interpretation of character values.
  *
  * Prior to 1.5.6 these constants were strings, as of 1.5.6 png_uint_32 values
  * are computed and a new macro (PNG_STRING_FROM_CHUNK) added to allow a string
  * to be generated if required.
  *
  * PNG_32b correctly produces a value shifted by up to 24 bits, even on
  * architectures where (int) is only 16 bits.
  */
-#define PNG_32b(b,s) ((png_uint_32)(b) << (s))
-#define PNG_U32(b1,b2,b3,b4) \
-   (PNG_32b(b1,24) | PNG_32b(b2,16) | PNG_32b(b3,8) | PNG_32b(b4,0))
+#define PNG_32b(b, s) ((png_uint_32)(b) << (s))
+#define PNG_U32(b1, b2, b3, b4) \
+  (PNG_32b(b1, 24) | PNG_32b(b2, 16) | PNG_32b(b3, 8) | PNG_32b(b4, 0))
 
 /* Constants for known chunk types.
  *
  * MAINTAINERS: If you need to add a chunk, define the name here.
  * For historical reasons these constants have the form png_<name>; i.e.
  * the prefix is lower case.  Please use decimal values as the parameters to
  * match the ISO PNG specification and to avoid relying on the C locale
  * interpretation of character values.  Please keep the list sorted.
  *
  * Notice that PNG_U32 is used to define a 32-bit value for the 4 byte chunk
  * type.  In fact the specification does not express chunk types this way,
  * however using a 32-bit value means that the chunk type can be read from the
  * stream using exactly the same code as used for a 32-bit unsigned value and
  * can be examined far more efficiently (using one arithmetic compare).
  *
  * Prior to 1.5.6 the chunk type constants were expressed as C strings.  The
  * libpng API still uses strings for 'unknown' chunks and a macro,
  * PNG_STRING_FROM_CHUNK, allows a string to be generated if required.  Notice
  * that for portable code numeric values must still be used; the string "IHDR"
  * is not portable and neither is PNG_U32('I', 'H', 'D', 'R').
  *
  * In 1.7.0 the definitions will be made public in png.h to avoid having to
  * duplicate the same definitions in application code.
  */
-#define png_IDAT PNG_U32( 73,  68,  65,  84)
-#define png_IEND PNG_U32( 73,  69,  78,  68)
-#define png_IHDR PNG_U32( 73,  72,  68,  82)
-#define png_PLTE PNG_U32( 80,  76,  84,  69)
-#define png_bKGD PNG_U32( 98,  75,  71,  68)
-#define png_cHRM PNG_U32( 99,  72,  82,  77)
-#define png_fRAc PNG_U32(102,  82,  65,  99) /* registered, not defined */
-#define png_gAMA PNG_U32(103,  65,  77,  65)
-#define png_gIFg PNG_U32(103,  73,  70, 103)
-#define png_gIFt PNG_U32(103,  73,  70, 116) /* deprecated */
-#define png_gIFx PNG_U32(103,  73,  70, 120)
-#define png_hIST PNG_U32(104,  73,  83,  84)
-#define png_iCCP PNG_U32(105,  67,  67,  80)
-#define png_iTXt PNG_U32(105,  84,  88, 116)
-#define png_oFFs PNG_U32(111,  70,  70, 115)
-#define png_pCAL PNG_U32(112,  67,  65,  76)
-#define png_pHYs PNG_U32(112,  72,  89, 115)
-#define png_sBIT PNG_U32(115,  66,  73,  84)
-#define png_sCAL PNG_U32(115,  67,  65,  76)
-#define png_sPLT PNG_U32(115,  80,  76,  84)
-#define png_sRGB PNG_U32(115,  82,  71,  66)
-#define png_sTER PNG_U32(115,  84,  69,  82)
-#define png_tEXt PNG_U32(116,  69,  88, 116)
-#define png_tIME PNG_U32(116,  73,  77,  69)
-#define png_tRNS PNG_U32(116,  82,  78,  83)
-#define png_zTXt PNG_U32(122,  84,  88, 116)
+#define png_IDAT PNG_U32(73, 68, 65, 84)
+#define png_IEND PNG_U32(73, 69, 78, 68)
+#define png_IHDR PNG_U32(73, 72, 68, 82)
+#define png_PLTE PNG_U32(80, 76, 84, 69)
+#define png_bKGD PNG_U32(98, 75, 71, 68)
+#define png_cHRM PNG_U32(99, 72, 82, 77)
+#define png_fRAc PNG_U32(102, 82, 65, 99) /* registered, not defined */
+#define png_gAMA PNG_U32(103, 65, 77, 65)
+#define png_gIFg PNG_U32(103, 73, 70, 103)
+#define png_gIFt PNG_U32(103, 73, 70, 116) /* deprecated */
+#define png_gIFx PNG_U32(103, 73, 70, 120)
+#define png_hIST PNG_U32(104, 73, 83, 84)
+#define png_iCCP PNG_U32(105, 67, 67, 80)
+#define png_iTXt PNG_U32(105, 84, 88, 116)
+#define png_oFFs PNG_U32(111, 70, 70, 115)
+#define png_pCAL PNG_U32(112, 67, 65, 76)
+#define png_pHYs PNG_U32(112, 72, 89, 115)
+#define png_sBIT PNG_U32(115, 66, 73, 84)
+#define png_sCAL PNG_U32(115, 67, 65, 76)
+#define png_sPLT PNG_U32(115, 80, 76, 84)
+#define png_sRGB PNG_U32(115, 82, 71, 66)
+#define png_sTER PNG_U32(115, 84, 69, 82)
+#define png_tEXt PNG_U32(116, 69, 88, 116)
+#define png_tIME PNG_U32(116, 73, 77, 69)
+#define png_tRNS PNG_U32(116, 82, 78, 83)
+#define png_zTXt PNG_U32(122, 84, 88, 116)
 
 /* The following will work on (signed char*) strings, whereas the get_uint_32
  * macro will fail on top-bit-set values because of the sign extension.
  */
-#define PNG_CHUNK_FROM_STRING(s)\
-   PNG_U32(0xff&(s)[0], 0xff&(s)[1], 0xff&(s)[2], 0xff&(s)[3])
+#define PNG_CHUNK_FROM_STRING(s) \
+  PNG_U32(0xff & (s)[0], 0xff & (s)[1], 0xff & (s)[2], 0xff & (s)[3])
 
 /* This uses (char), not (png_byte) to avoid warnings on systems where (char) is
  * signed and the argument is a (char[])  This macro will fail miserably on
  * systems where (char) is more than 8 bits.
  */
-#define PNG_STRING_FROM_CHUNK(s,c)\
-   (void)(((char*)(s))[0]=(char)((c)>>24), ((char*)(s))[1]=(char)((c)>>16),\
-   ((char*)(s))[2]=(char)((c)>>8), ((char*)(s))[3]=(char)((c)))
+#define PNG_STRING_FROM_CHUNK(s, c)           \
+  (void)(((char*)(s))[0] = (char)((c) >> 24), \
+         ((char*)(s))[1] = (char)((c) >> 16), \
+         ((char*)(s))[2] = (char)((c) >> 8), ((char*)(s))[3] = (char)((c)))
 
 /* Do the same but terminate with a null character. */
-#define PNG_CSTRING_FROM_CHUNK(s,c)\
-   (void)(PNG_STRING_FROM_CHUNK(s,c), ((char*)(s))[4] = 0)
+#define PNG_CSTRING_FROM_CHUNK(s, c) \
+  (void)(PNG_STRING_FROM_CHUNK(s, c), ((char*)(s))[4] = 0)
 
 /* Test on flag values as defined in the spec (section 5.4): */
-#define PNG_CHUNK_ANCILLARY(c)   (1 & ((c) >> 29))
-#define PNG_CHUNK_CRITICAL(c)     (!PNG_CHUNK_ANCILLARY(c))
-#define PNG_CHUNK_PRIVATE(c)      (1 & ((c) >> 21))
-#define PNG_CHUNK_RESERVED(c)     (1 & ((c) >> 13))
-#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >>  5))
+#define PNG_CHUNK_ANCILLARY(c) (1 & ((c) >> 29))
+#define PNG_CHUNK_CRITICAL(c) (!PNG_CHUNK_ANCILLARY(c))
+#define PNG_CHUNK_PRIVATE(c) (1 & ((c) >> 21))
+#define PNG_CHUNK_RESERVED(c) (1 & ((c) >> 13))
+#define PNG_CHUNK_SAFE_TO_COPY(c) (1 & ((c) >> 5))
 
 /* Gamma values (new at libpng-1.5.4): */
-#define PNG_GAMMA_MAC_OLD 151724  /* Assume '1.8' is really 2.2/1.45! */
+#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */
 #define PNG_GAMMA_MAC_INVERSE 65909
 #define PNG_GAMMA_sRGB_INVERSE 45455
 
 /* Almost everything below is C specific; the #defines above can be used in
  * non-C code (so long as it is C-preprocessed) the rest of this stuff cannot.
  */
 #ifndef PNG_VERSION_INFO_ONLY
 
 #include "pngstruct.h"
 #include "pnginfo.h"
 
 /* Validate the include paths - the include path used to generate pnglibconf.h
  * must match that used in the build, or we must be using pnglibconf.h.prebuilt:
  */
 #if PNG_ZLIB_VERNUM != 0 && PNG_ZLIB_VERNUM != ZLIB_VERNUM
-#  error ZLIB_VERNUM != PNG_ZLIB_VERNUM \
+#error ZLIB_VERNUM != PNG_ZLIB_VERNUM \
       "-I (include path) error: see the notes in pngpriv.h"
-   /* This means that when pnglibconf.h was built the copy of zlib.h that it
-    * used is not the same as the one being used here.  Because the build of
-    * libpng makes decisions to use inflateInit2 and inflateReset2 based on the
-    * zlib version number and because this affects handling of certain broken
-    * PNG files the -I directives must match.
-    *
-    * The most likely explanation is that you passed a -I in CFLAGS, this will
-    * not work; all the preprocessor directories and in particular all the -I
-    * directives must be in CPPFLAGS.
-    */
+/* This means that when pnglibconf.h was built the copy of zlib.h that it
+ * used is not the same as the one being used here.  Because the build of
+ * libpng makes decisions to use inflateInit2 and inflateReset2 based on the
+ * zlib version number and because this affects handling of certain broken
+ * PNG files the -I directives must match.
+ *
+ * The most likely explanation is that you passed a -I in CFLAGS, this will
+ * not work; all the preprocessor directories and in particular all the -I
+ * directives must be in CPPFLAGS.
+ */
 #endif
 
 /* This is used for 16 bit gamma tables -- only the top level pointers are
  * const; this could be changed:
  */
-typedef const png_uint_16p * png_const_uint_16pp;
+typedef const png_uint_16p* png_const_uint_16pp;
 
 /* Added to libpng-1.5.7: sRGB conversion tables */
-#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
-   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) || \
+    defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
 #ifdef PNG_SIMPLIFIED_READ_SUPPORTED
 PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]);
-   /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value,
-    * 0..65535.  This table gives the closest 16-bit answers (no errors).
-    */
+/* Convert from an sRGB encoded value 0..255 to a 16-bit linear value,
+ * 0..65535.  This table gives the closest 16-bit answers (no errors).
+ */
 #endif
 
 PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]);
 PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
 
-#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\
-   ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8))
-   /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB
-    * encoded value with maximum error 0.646365.  Note that the input is not a
-    * 16-bit value; it has been multiplied by 255! */
+#define PNG_sRGB_FROM_LINEAR(linear)                                    \
+  ((png_byte)(                                                          \
+      (png_sRGB_base[(linear) >> 15] +                                  \
+       ((((linear)&0x7fff) * png_sRGB_delta[(linear) >> 15]) >> 12)) >> \
+      8))
+/* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB
+ * encoded value with maximum error 0.646365.  Note that the input is not a
+ * 16-bit value; it has been multiplied by 255! */
 #endif /* PNG_SIMPLIFIED_READ/WRITE */
 
-
 /* Inhibit C++ name-mangling for libpng functions but not for system calls. */
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
 /* Internal functions; these are not exported from a DLL however because they
  * are used within several of the C source files they have to be C extern.
  *
  * All of these functions must be declared with PNG_INTERNAL_FUNCTION.
  */
 
 /* Zlib support */
 #define PNG_UNEXPECTED_ZLIB_RETURN (-7)
-PNG_INTERNAL_FUNCTION(void, png_zstream_error,(png_structrp png_ptr, int ret),
-   PNG_EMPTY);
-   /* Used by the zlib handling functions to ensure that z_stream::msg is always
-    * set before they return.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_zstream_error,
+                      (png_structrp png_ptr, int ret),
+                      PNG_EMPTY);
+/* Used by the zlib handling functions to ensure that z_stream::msg is always
+ * set before they return.
+ */
 
 #ifdef PNG_WRITE_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_free_buffer_list,(png_structrp png_ptr,
-   png_compression_bufferp *list),PNG_EMPTY);
-   /* Free the buffer list used by the compressed write code. */
+PNG_INTERNAL_FUNCTION(void,
+                      png_free_buffer_list,
+                      (png_structrp png_ptr, png_compression_bufferp* list),
+                      PNG_EMPTY);
+/* Free the buffer list used by the compressed write code. */
 #endif
 
-#if defined(PNG_FLOATING_POINT_SUPPORTED) && \
-   !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) && \
-   (defined(PNG_gAMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) || \
-   defined(PNG_sCAL_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED) || \
-   defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)) || \
-   (defined(PNG_sCAL_SUPPORTED) && \
-   defined(PNG_FLOATING_ARITHMETIC_SUPPORTED))
-PNG_INTERNAL_FUNCTION(png_fixed_point,png_fixed,(png_const_structrp png_ptr,
-   double fp, png_const_charp text),PNG_EMPTY);
+#if defined(PNG_FLOATING_POINT_SUPPORTED) &&                           \
+        !defined(PNG_FIXED_POINT_MACRO_SUPPORTED) &&                   \
+        (defined(PNG_gAMA_SUPPORTED) || defined(PNG_cHRM_SUPPORTED) || \
+         defined(PNG_sCAL_SUPPORTED) ||                                \
+         defined(PNG_READ_BACKGROUND_SUPPORTED) ||                     \
+         defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)) ||                   \
+    (defined(PNG_sCAL_SUPPORTED) &&                                    \
+     defined(PNG_FLOATING_ARITHMETIC_SUPPORTED))
+PNG_INTERNAL_FUNCTION(png_fixed_point,
+                      png_fixed,
+                      (png_const_structrp png_ptr,
+                       double fp,
+                       png_const_charp text),
+                      PNG_EMPTY);
 #endif
 
 /* Check the user version string for compatibility, returns false if the version
  * numbers aren't compatible.
  */
-PNG_INTERNAL_FUNCTION(int,png_user_version_check,(png_structrp png_ptr,
-   png_const_charp user_png_ver),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_user_version_check,
+                      (png_structrp png_ptr, png_const_charp user_png_ver),
+                      PNG_EMPTY);
 
 /* Internal base allocator - no messages, NULL on failure to allocate.  This
  * does, however, call the application provided allocator and that could call
  * png_error (although that would be a bug in the application implementation.)
  */
-PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_base,(png_const_structrp png_ptr,
-   png_alloc_size_t size),PNG_ALLOCATED);
+PNG_INTERNAL_FUNCTION(png_voidp,
+                      png_malloc_base,
+                      (png_const_structrp png_ptr, png_alloc_size_t size),
+                      PNG_ALLOCATED);
 
-#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\
-   defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) || \
+    defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
 /* Internal array allocator, outputs no error or warning messages on failure,
- * just returns NULL.  
+ * just returns NULL.
  */
-PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_array,(png_const_structrp png_ptr,
-   int nelements, size_t element_size),PNG_ALLOCATED);
+PNG_INTERNAL_FUNCTION(png_voidp,
+                      png_malloc_array,
+                      (png_const_structrp png_ptr,
+                       int nelements,
+                       size_t element_size),
+                      PNG_ALLOCATED);
 
 /* The same but an existing array is extended by add_elements.  This function
  * also memsets the new elements to 0 and copies the old elements.  The old
  * array is not freed or altered.
  */
-PNG_INTERNAL_FUNCTION(png_voidp,png_realloc_array,(png_const_structrp png_ptr,
-   png_const_voidp array, int old_elements, int add_elements,
-   size_t element_size),PNG_ALLOCATED);
+PNG_INTERNAL_FUNCTION(png_voidp,
+                      png_realloc_array,
+                      (png_const_structrp png_ptr,
+                       png_const_voidp array,
+                       int old_elements,
+                       int add_elements,
+                       size_t element_size),
+                      PNG_ALLOCATED);
 #endif /* text, sPLT or unknown chunks */
 
 /* Magic to create a struct when there is no struct to call the user supplied
  * memory allocators.  Because error handling has not been set up the memory
  * handlers can't safely call png_error, but this is an obscure and undocumented
  * restriction so libpng has to assume that the 'free' handler, at least, might
  * call png_error.
  */
-PNG_INTERNAL_FUNCTION(png_structp,png_create_png_struct,
-   (png_const_charp user_png_ver, png_voidp error_ptr, png_error_ptr error_fn,
-    png_error_ptr warn_fn, png_voidp mem_ptr, png_malloc_ptr malloc_fn,
-    png_free_ptr free_fn),PNG_ALLOCATED);
+PNG_INTERNAL_FUNCTION(png_structp,
+                      png_create_png_struct,
+                      (png_const_charp user_png_ver,
+                       png_voidp error_ptr,
+                       png_error_ptr error_fn,
+                       png_error_ptr warn_fn,
+                       png_voidp mem_ptr,
+                       png_malloc_ptr malloc_fn,
+                       png_free_ptr free_fn),
+                      PNG_ALLOCATED);
 
 /* Free memory from internal libpng struct */
-PNG_INTERNAL_FUNCTION(void,png_destroy_png_struct,(png_structrp png_ptr),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_destroy_png_struct,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 
 /* Free an allocated jmp_buf (always succeeds) */
-PNG_INTERNAL_FUNCTION(void,png_free_jmpbuf,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void, png_free_jmpbuf, (png_structrp png_ptr), PNG_EMPTY);
 
 /* Function to allocate memory for zlib.  PNGAPI is disallowed. */
-PNG_INTERNAL_FUNCTION(voidpf,png_zalloc,(voidpf png_ptr, uInt items, uInt size),
-   PNG_ALLOCATED);
+PNG_INTERNAL_FUNCTION(voidpf,
+                      png_zalloc,
+                      (voidpf png_ptr, uInt items, uInt size),
+                      PNG_ALLOCATED);
 
 /* Function to free memory for zlib.  PNGAPI is disallowed. */
-PNG_INTERNAL_FUNCTION(void,png_zfree,(voidpf png_ptr, voidpf ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void, png_zfree, (voidpf png_ptr, voidpf ptr), PNG_EMPTY);
 
 /* Next four functions are used internally as callbacks.  PNGCBAPI is required
  * but not PNG_EXPORT.  PNGAPI added at libpng version 1.2.3, changed to
  * PNGCBAPI at 1.5.0
  */
 
-PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_read_data,(png_structp png_ptr,
-    png_bytep data, png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void PNGCBAPI,
+                      png_default_read_data,
+                      (png_structp png_ptr, png_bytep data, png_size_t length),
+                      PNG_EMPTY);
 
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_push_fill_buffer,(png_structp png_ptr,
-    png_bytep buffer, png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void PNGCBAPI,
+                      png_push_fill_buffer,
+                      (png_structp png_ptr,
+                       png_bytep buffer,
+                       png_size_t length),
+                      PNG_EMPTY);
 #endif
 
-PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_write_data,(png_structp png_ptr,
-    png_bytep data, png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void PNGCBAPI,
+                      png_default_write_data,
+                      (png_structp png_ptr, png_bytep data, png_size_t length),
+                      PNG_EMPTY);
 
 #ifdef PNG_WRITE_FLUSH_SUPPORTED
-#  ifdef PNG_STDIO_SUPPORTED
-PNG_INTERNAL_FUNCTION(void PNGCBAPI,png_default_flush,(png_structp png_ptr),
-   PNG_EMPTY);
-#  endif
+#ifdef PNG_STDIO_SUPPORTED
+PNG_INTERNAL_FUNCTION(void PNGCBAPI,
+                      png_default_flush,
+                      (png_structp png_ptr),
+                      PNG_EMPTY);
+#endif
 #endif
 
 /* Reset the CRC variable */
-PNG_INTERNAL_FUNCTION(void,png_reset_crc,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void, png_reset_crc, (png_structrp png_ptr), PNG_EMPTY);
 
 /* Write the "data" buffer to whatever output you are using */
-PNG_INTERNAL_FUNCTION(void,png_write_data,(png_structrp png_ptr,
-    png_const_bytep data, png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_data,
+                      (png_structrp png_ptr,
+                       png_const_bytep data,
+                       png_size_t length),
+                      PNG_EMPTY);
 
 /* Read and check the PNG file signature */
-PNG_INTERNAL_FUNCTION(void,png_read_sig,(png_structrp png_ptr,
-   png_inforp info_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_sig,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
 
 /* Read the chunk header (length + type name) */
-PNG_INTERNAL_FUNCTION(png_uint_32,png_read_chunk_header,(png_structrp png_ptr),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_uint_32,
+                      png_read_chunk_header,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 
 /* Read data from whatever input you are using into the "data" buffer */
-PNG_INTERNAL_FUNCTION(void,png_read_data,(png_structrp png_ptr, png_bytep data,
-    png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_data,
+                      (png_structrp png_ptr, png_bytep data, png_size_t length),
+                      PNG_EMPTY);
 
 /* Read bytes into buf, and update png_ptr->crc */
-PNG_INTERNAL_FUNCTION(void,png_crc_read,(png_structrp png_ptr, png_bytep buf,
-    png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_crc_read,
+                      (png_structrp png_ptr, png_bytep buf, png_uint_32 length),
+                      PNG_EMPTY);
 
 /* Read "skip" bytes, read the file crc, and (optionally) verify png_ptr->crc */
-PNG_INTERNAL_FUNCTION(int,png_crc_finish,(png_structrp png_ptr,
-   png_uint_32 skip),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_crc_finish,
+                      (png_structrp png_ptr, png_uint_32 skip),
+                      PNG_EMPTY);
 
 /* Read the CRC from the file and compare it to the libpng calculated CRC */
-PNG_INTERNAL_FUNCTION(int,png_crc_error,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int, png_crc_error, (png_structrp png_ptr), PNG_EMPTY);
 
 /* Calculate the CRC over a section of data.  Note that we are only
  * passing a maximum of 64K on systems that have this as a memory limit,
  * since this is the maximum buffer size we can specify.
  */
-PNG_INTERNAL_FUNCTION(void,png_calculate_crc,(png_structrp png_ptr,
-   png_const_bytep ptr, png_size_t length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_calculate_crc,
+                      (png_structrp png_ptr,
+                       png_const_bytep ptr,
+                       png_size_t length),
+                      PNG_EMPTY);
 
 #ifdef PNG_WRITE_FLUSH_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_flush,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void, png_flush, (png_structrp png_ptr), PNG_EMPTY);
 #endif
 
 /* Write various chunks */
 
 /* Write the IHDR chunk, and update the png_struct with the necessary
  * information.
  */
-PNG_INTERNAL_FUNCTION(void,png_write_IHDR,(png_structrp png_ptr,
-   png_uint_32 width, png_uint_32 height, int bit_depth, int color_type,
-   int compression_method, int filter_method, int interlace_method),PNG_EMPTY);
-
-PNG_INTERNAL_FUNCTION(void,png_write_PLTE,(png_structrp png_ptr,
-   png_const_colorp palette, png_uint_32 num_pal),PNG_EMPTY);
-
-PNG_INTERNAL_FUNCTION(void,png_compress_IDAT,(png_structrp png_ptr,
-   png_const_bytep row_data, png_alloc_size_t row_data_length, int flush),
-   PNG_EMPTY);
-
-PNG_INTERNAL_FUNCTION(void,png_write_IEND,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_IHDR,
+                      (png_structrp png_ptr,
+                       png_uint_32 width,
+                       png_uint_32 height,
+                       int bit_depth,
+                       int color_type,
+                       int compression_method,
+                       int filter_method,
+                       int interlace_method),
+                      PNG_EMPTY);
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_PLTE,
+                      (png_structrp png_ptr,
+                       png_const_colorp palette,
+                       png_uint_32 num_pal),
+                      PNG_EMPTY);
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_compress_IDAT,
+                      (png_structrp png_ptr,
+                       png_const_bytep row_data,
+                       png_alloc_size_t row_data_length,
+                       int flush),
+                      PNG_EMPTY);
+
+PNG_INTERNAL_FUNCTION(void, png_write_IEND, (png_structrp png_ptr), PNG_EMPTY);
 
 #ifdef PNG_WRITE_gAMA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_gAMA_fixed,(png_structrp png_ptr,
-    png_fixed_point file_gamma),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_gAMA_fixed,
+                      (png_structrp png_ptr, png_fixed_point file_gamma),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_sBIT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_sBIT,(png_structrp png_ptr,
-    png_const_color_8p sbit, int color_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_sBIT,
+                      (png_structrp png_ptr,
+                       png_const_color_8p sbit,
+                       int color_type),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_cHRM_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_cHRM_fixed,(png_structrp png_ptr,
-    const png_xy *xy), PNG_EMPTY);
-    /* The xy value must have been previously validated */
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_cHRM_fixed,
+                      (png_structrp png_ptr, const png_xy* xy),
+                      PNG_EMPTY);
+/* The xy value must have been previously validated */
 #endif
 
 #ifdef PNG_WRITE_sRGB_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_sRGB,(png_structrp png_ptr,
-    int intent),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_sRGB,
+                      (png_structrp png_ptr, int intent),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_iCCP_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_iCCP,(png_structrp png_ptr,
-   png_const_charp name, png_const_bytep profile), PNG_EMPTY);
-   /* The profile must have been previously validated for correctness, the
-    * length comes from the first four bytes.  Only the base, deflate,
-    * compression is supported.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_iCCP,
+                      (png_structrp png_ptr,
+                       png_const_charp name,
+                       png_const_bytep profile),
+                      PNG_EMPTY);
+/* The profile must have been previously validated for correctness, the
+ * length comes from the first four bytes.  Only the base, deflate,
+ * compression is supported.
+ */
 #endif
 
 #ifdef PNG_WRITE_sPLT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_sPLT,(png_structrp png_ptr,
-    png_const_sPLT_tp palette),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_sPLT,
+                      (png_structrp png_ptr, png_const_sPLT_tp palette),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_tRNS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_tRNS,(png_structrp png_ptr,
-    png_const_bytep trans, png_const_color_16p values, int number,
-    int color_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_tRNS,
+                      (png_structrp png_ptr,
+                       png_const_bytep trans,
+                       png_const_color_16p values,
+                       int number,
+                       int color_type),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_bKGD_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_bKGD,(png_structrp png_ptr,
-    png_const_color_16p values, int color_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_bKGD,
+                      (png_structrp png_ptr,
+                       png_const_color_16p values,
+                       int color_type),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_hIST_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_hIST,(png_structrp png_ptr,
-    png_const_uint_16p hist, int num_hist),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_hIST,
+                      (png_structrp png_ptr,
+                       png_const_uint_16p hist,
+                       int num_hist),
+                      PNG_EMPTY);
 #endif
 
 /* Chunks that have keywords */
 #ifdef PNG_WRITE_tEXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_tEXt,(png_structrp png_ptr,
-   png_const_charp key, png_const_charp text, png_size_t text_len),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_tEXt,
+                      (png_structrp png_ptr,
+                       png_const_charp key,
+                       png_const_charp text,
+                       png_size_t text_len),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_zTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_zTXt,(png_structrp png_ptr, png_const_charp
-    key, png_const_charp text, png_size_t text_len, int compression),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_zTXt,
+                      (png_structrp png_ptr,
+                       png_const_charp key,
+                       png_const_charp text,
+                       png_size_t text_len,
+                       int compression),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_iTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_iTXt,(png_structrp png_ptr,
-    int compression, png_const_charp key, png_const_charp lang,
-    png_const_charp lang_key, png_const_charp text),PNG_EMPTY);
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED  /* Added at version 1.0.14 and 1.2.4 */
-PNG_INTERNAL_FUNCTION(int,png_set_text_2,(png_const_structrp png_ptr,
-    png_inforp info_ptr, png_const_textp text_ptr, int num_text),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_iTXt,
+                      (png_structrp png_ptr,
+                       int compression,
+                       png_const_charp key,
+                       png_const_charp lang,
+                       png_const_charp lang_key,
+                       png_const_charp text),
+                      PNG_EMPTY);
+#endif
+
+#ifdef PNG_TEXT_SUPPORTED /* Added at version 1.0.14 and 1.2.4 */
+PNG_INTERNAL_FUNCTION(int,
+                      png_set_text_2,
+                      (png_const_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_const_textp text_ptr,
+                       int num_text),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_oFFs_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_oFFs,(png_structrp png_ptr,
-    png_int_32 x_offset, png_int_32 y_offset, int unit_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_oFFs,
+                      (png_structrp png_ptr,
+                       png_int_32 x_offset,
+                       png_int_32 y_offset,
+                       int unit_type),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_pCAL_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_pCAL,(png_structrp png_ptr,
-    png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
-    png_const_charp units, png_charpp params),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_pCAL,
+                      (png_structrp png_ptr,
+                       png_charp purpose,
+                       png_int_32 X0,
+                       png_int_32 X1,
+                       int type,
+                       int nparams,
+                       png_const_charp units,
+                       png_charpp params),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_pHYs_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_pHYs,(png_structrp png_ptr,
-    png_uint_32 x_pixels_per_unit, png_uint_32 y_pixels_per_unit,
-    int unit_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_pHYs,
+                      (png_structrp png_ptr,
+                       png_uint_32 x_pixels_per_unit,
+                       png_uint_32 y_pixels_per_unit,
+                       int unit_type),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_tIME_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_tIME,(png_structrp png_ptr,
-    png_const_timep mod_time),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_tIME,
+                      (png_structrp png_ptr, png_const_timep mod_time),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_sCAL_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_write_sCAL_s,(png_structrp png_ptr,
-    int unit, png_const_charp width, png_const_charp height),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_sCAL_s,
+                      (png_structrp png_ptr,
+                       int unit,
+                       png_const_charp width,
+                       png_const_charp height),
+                      PNG_EMPTY);
 #endif
 
 /* Called when finished processing a row of data */
-PNG_INTERNAL_FUNCTION(void,png_write_finish_row,(png_structrp png_ptr),
-    PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_finish_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 
 /* Internal use only.   Called before first row of data */
-PNG_INTERNAL_FUNCTION(void,png_write_start_row,(png_structrp png_ptr),
-    PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_start_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 
 /* Combine a row of data, dealing with alpha, etc. if requested.  'row' is an
  * array of png_ptr->width pixels.  If the image is not interlaced or this
  * is the final pass this just does a memcpy, otherwise the "display" flag
  * is used to determine whether to copy pixels that are not in the current pass.
  *
  * Because 'png_do_read_interlace' (below) replicates pixels this allows this
  * function to achieve the documented 'blocky' appearance during interlaced read
  * if display is 1 and the 'sparkle' appearance, where existing pixels in 'row'
  * are not changed if they are not in the current pass, when display is 0.
  *
  * 'display' must be 0 or 1, otherwise the memcpy will be done regardless.
  *
  * The API always reads from the png_struct row buffer and always assumes that
  * it is full width (png_do_read_interlace has already been called.)
  *
  * This function is only ever used to write to row buffers provided by the
  * caller of the relevant libpng API and the row must have already been
  * transformed by the read transformations.
  *
  * The PNG_USE_COMPILE_TIME_MASKS option causes generation of pre-computed
  * bitmasks for use within the code, otherwise runtime generated masks are used.
  * The default is compile time masks.
  */
 #ifndef PNG_USE_COMPILE_TIME_MASKS
-#  define PNG_USE_COMPILE_TIME_MASKS 1
+#define PNG_USE_COMPILE_TIME_MASKS 1
 #endif
-PNG_INTERNAL_FUNCTION(void,png_combine_row,(png_const_structrp png_ptr,
-    png_bytep row, int display),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_combine_row,
+                      (png_const_structrp png_ptr, png_bytep row, int display),
+                      PNG_EMPTY);
 
 #ifdef PNG_READ_INTERLACING_SUPPORTED
 /* Expand an interlaced row: the 'row_info' describes the pass data that has
  * been read in and must correspond to the pixels in 'row', the pixels are
  * expanded (moved apart) in 'row' to match the final layout, when doing this
  * the pixels are *replicated* to the intervening space.  This is essential for
  * the correct operation of png_combine_row, above.
  */
-PNG_INTERNAL_FUNCTION(void,png_do_read_interlace,(png_row_infop row_info,
-    png_bytep row, int pass, png_uint_32 transformations),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_interlace,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       int pass,
+                       png_uint_32 transformations),
+                      PNG_EMPTY);
 #endif
 
 /* GRR TO DO (2.0 or whenever):  simplify other internal calling interfaces */
 
 #ifdef PNG_WRITE_INTERLACING_SUPPORTED
 /* Grab pixels out of a row for an interlaced pass */
-PNG_INTERNAL_FUNCTION(void,png_do_write_interlace,(png_row_infop row_info,
-    png_bytep row, int pass),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_write_interlace,
+                      (png_row_infop row_info, png_bytep row, int pass),
+                      PNG_EMPTY);
 #endif
 
 /* Unfilter a row: check the filter value before calling this, there is no point
  * calling it for PNG_FILTER_VALUE_NONE.
  */
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row,(png_structrp pp, png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row, int filter),PNG_EMPTY);
-
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_up_neon,(png_row_infop row_info,
-    png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_neon,(png_row_infop
-    row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row,
+                      (png_structrp pp,
+                       png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row,
+                       int filter),
+                      PNG_EMPTY);
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_up_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_sub3_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_sub4_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_avg3_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_avg4_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_paeth3_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_filter_row_paeth4_neon,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep prev_row),
+                      PNG_EMPTY);
 
 /* Choose the best filter to use and filter the row data */
-PNG_INTERNAL_FUNCTION(void,png_write_find_filter,(png_structrp png_ptr,
-    png_row_infop row_info),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_write_find_filter,
+                      (png_structrp png_ptr, png_row_infop row_info),
+                      PNG_EMPTY);
 
 #ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_read_IDAT_data,(png_structrp png_ptr,
-   png_bytep output, png_alloc_size_t avail_out),PNG_EMPTY);
-   /* Read 'avail_out' bytes of data from the IDAT stream.  If the output buffer
-    * is NULL the function checks, instead, for the end of the stream.  In this
-    * case a benign error will be issued if the stream end is not found or if
-    * extra data has to be consumed.
-    */
-PNG_INTERNAL_FUNCTION(void,png_read_finish_IDAT,(png_structrp png_ptr),
-   PNG_EMPTY);
-   /* This cleans up when the IDAT LZ stream does not end when the last image
-    * byte is read; there is still some pending input.
-    */
-
-PNG_INTERNAL_FUNCTION(void,png_read_finish_row,(png_structrp png_ptr),
-   PNG_EMPTY);
-   /* Finish a row while reading, dealing with interlacing passes, etc. */
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_IDAT_data,
+                      (png_structrp png_ptr,
+                       png_bytep output,
+                       png_alloc_size_t avail_out),
+                      PNG_EMPTY);
+/* Read 'avail_out' bytes of data from the IDAT stream.  If the output buffer
+ * is NULL the function checks, instead, for the end of the stream.  In this
+ * case a benign error will be issued if the stream end is not found or if
+ * extra data has to be consumed.
+ */
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_finish_IDAT,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+/* This cleans up when the IDAT LZ stream does not end when the last image
+ * byte is read; there is still some pending input.
+ */
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_finish_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+/* Finish a row while reading, dealing with interlacing passes, etc. */
 #endif
 
 /* Initialize the row buffers, etc. */
-PNG_INTERNAL_FUNCTION(void,png_read_start_row,(png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_start_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
 /* Optional call to update the users info structure */
-PNG_INTERNAL_FUNCTION(void,png_read_transform_info,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_transform_info,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
 #endif
 
 /* These are the functions that do the transformations */
 #ifdef PNG_READ_FILLER_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_read_filler,(png_row_infop row_info,
-    png_bytep row, png_uint_32 filler, png_uint_32 flags),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_filler,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_uint_32 filler,
+                       png_uint_32 flags),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_SWAP_ALPHA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_read_swap_alpha,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_swap_alpha,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_SWAP_ALPHA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_write_swap_alpha,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_write_swap_alpha,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_INVERT_ALPHA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_read_invert_alpha,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_invert_alpha,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_INVERT_ALPHA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_write_invert_alpha,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_write_invert_alpha,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #if defined(PNG_WRITE_FILLER_SUPPORTED) || \
     defined(PNG_READ_STRIP_ALPHA_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_strip_channel,(png_row_infop row_info,
-    png_bytep row, int at_start),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_strip_channel,
+                      (png_row_infop row_info, png_bytep row, int at_start),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_16BIT_SUPPORTED
 #if defined(PNG_READ_SWAP_SUPPORTED) || defined(PNG_WRITE_SWAP_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_swap,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_swap,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 #endif
 
 #if defined(PNG_READ_PACKSWAP_SUPPORTED) || \
     defined(PNG_WRITE_PACKSWAP_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_packswap,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_packswap,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-PNG_INTERNAL_FUNCTION(int,png_do_rgb_to_gray,(png_structrp png_ptr,
-    png_row_infop row_info, png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_do_rgb_to_gray,
+                      (png_structrp png_ptr,
+                       png_row_infop row_info,
+                       png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_gray_to_rgb,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_gray_to_rgb,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_PACK_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_unpack,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_unpack,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_SHIFT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_unshift,(png_row_infop row_info,
-    png_bytep row, png_const_color_8p sig_bits),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_unshift,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_color_8p sig_bits),
+                      PNG_EMPTY);
 #endif
 
 #if defined(PNG_READ_INVERT_SUPPORTED) || defined(PNG_WRITE_INVERT_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_invert,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_invert,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_scale_16_to_8,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_scale_16_to_8,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_STRIP_16_TO_8_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_chop,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_chop,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_QUANTIZE_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_quantize,(png_row_infop row_info,
-    png_bytep row, png_const_bytep palette_lookup,
-    png_const_bytep quantize_lookup),PNG_EMPTY);
-
-#  ifdef PNG_CORRECT_PALETTE_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_correct_palette,(png_structrp png_ptr,
-    png_colorp palette, int num_palette),PNG_EMPTY);
-#  endif
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_quantize,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_bytep palette_lookup,
+                       png_const_bytep quantize_lookup),
+                      PNG_EMPTY);
+
+#ifdef PNG_CORRECT_PALETTE_SUPPORTED
+PNG_INTERNAL_FUNCTION(void,
+                      png_correct_palette,
+                      (png_structrp png_ptr,
+                       png_colorp palette,
+                       int num_palette),
+                      PNG_EMPTY);
+#endif
 #endif
 
 #if defined(PNG_READ_BGR_SUPPORTED) || defined(PNG_WRITE_BGR_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_bgr,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_bgr,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_PACK_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_pack,(png_row_infop row_info,
-   png_bytep row, png_uint_32 bit_depth),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_pack,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_uint_32 bit_depth),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_WRITE_SHIFT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_shift,(png_row_infop row_info,
-    png_bytep row, png_const_color_8p bit_depth),PNG_EMPTY);
-#endif
-
-#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_shift,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_color_8p bit_depth),
+                      PNG_EMPTY);
+#endif
+
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) || \
     defined(PNG_READ_ALPHA_MODE_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_compose,(png_row_infop row_info,
-    png_bytep row, png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_compose,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_structrp png_ptr),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_gamma,(png_row_infop row_info,
-    png_bytep row, png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_gamma,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_structrp png_ptr),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_ALPHA_MODE_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_encode_alpha,(png_row_infop row_info,
-   png_bytep row, png_structrp png_ptr),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_encode_alpha,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_structrp png_ptr),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_EXPAND_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_expand_palette,(png_row_infop row_info,
-    png_bytep row, png_const_colorp palette, png_const_bytep trans,
-    int num_trans),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_do_expand,(png_row_infop row_info,
-    png_bytep row, png_const_color_16p trans_color),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_expand_palette,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_colorp palette,
+                       png_const_bytep trans,
+                       int num_trans),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_expand,
+                      (png_row_infop row_info,
+                       png_bytep row,
+                       png_const_color_16p trans_color),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_EXPAND_16_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_expand_16,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_expand_16,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 /* The following decodes the appropriate chunks, and does error correction,
  * then calls the appropriate callback for the chunk if it is valid.
  */
 
 /* Decode the IHDR chunk */
-PNG_INTERNAL_FUNCTION(void,png_handle_IHDR,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_handle_PLTE,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_handle_IEND,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_IHDR,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_PLTE,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_IEND,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 
 #ifdef PNG_READ_bKGD_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_bKGD,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_bKGD,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_cHRM_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_cHRM,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_cHRM,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_gAMA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_gAMA,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_gAMA,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_hIST_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_hIST,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_hIST,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_iCCP_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_iCCP,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_iCCP,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif /* PNG_READ_iCCP_SUPPORTED */
 
 #ifdef PNG_READ_iTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_iTXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_iTXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_oFFs_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_oFFs,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_oFFs,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_pCAL_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_pCAL,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_pCAL,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_pHYs_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_pHYs,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_pHYs,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_sBIT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_sBIT,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_sBIT,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_sCAL_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_sCAL,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_sCAL,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_sPLT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_sPLT,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_sPLT,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif /* PNG_READ_sPLT_SUPPORTED */
 
 #ifdef PNG_READ_sRGB_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_sRGB,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_sRGB,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_tEXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_tEXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_tEXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_tIME_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_tIME,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_tIME,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_tRNS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_tRNS,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_tRNS,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_zTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_zTXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-#endif
-
-PNG_INTERNAL_FUNCTION(void,png_check_chunk_name,(png_structrp png_ptr,
-    png_uint_32 chunk_name),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_handle_zTXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+#endif
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_check_chunk_name,
+                      (png_structrp png_ptr, png_uint_32 chunk_name),
+                      PNG_EMPTY);
 
 #ifdef PNG_READ_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_handle_unknown,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length, int keep),PNG_EMPTY);
-   /* This is the function that gets called for unknown chunks.  The 'keep'
-    * argument is either non-zero for a known chunk that has been set to be
-    * handled as unknown or zero for an unknown chunk.  By default the function
-    * just skips the chunk or errors out if it is critical.
-    */
+PNG_INTERNAL_FUNCTION(
+    void,
+    png_handle_unknown,
+    (png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length, int keep),
+    PNG_EMPTY);
+/* This is the function that gets called for unknown chunks.  The 'keep'
+ * argument is either non-zero for a known chunk that has been set to be
+ * handled as unknown or zero for an unknown chunk.  By default the function
+ * just skips the chunk or errors out if it is critical.
+ */
 
 #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 #ifdef PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
-PNG_INTERNAL_FUNCTION(int,png_chunk_unknown_handling,
-    (png_const_structrp png_ptr, png_uint_32 chunk_name),PNG_EMPTY);
-   /* Exactly as the API png_handle_as_unknown() except that the argument is a
-    * 32-bit chunk name, not a string.
-    */
+PNG_INTERNAL_FUNCTION(int,
+                      png_chunk_unknown_handling,
+                      (png_const_structrp png_ptr, png_uint_32 chunk_name),
+                      PNG_EMPTY);
+/* Exactly as the API png_handle_as_unknown() except that the argument is a
+ * 32-bit chunk name, not a string.
+ */
 #endif
 #endif /* PNG_READ_UNKNOWN_CHUNKS_SUPPORTED */
 #endif /* PNG_READ_SUPPORTED */
 
 /* Handle the transformations for reading and writing */
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_read_transformations,(png_structrp png_ptr,
-   png_row_infop row_info),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_transformations,
+                      (png_structrp png_ptr, png_row_infop row_info),
+                      PNG_EMPTY);
 #endif
 #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_write_transformations,(png_structrp png_ptr,
-   png_row_infop row_info),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_write_transformations,
+                      (png_structrp png_ptr, png_row_infop row_info),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_init_read_transformations,(png_structrp png_ptr),
-    PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_init_read_transformations,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_push_read_chunk,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_sig,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_check_crc,(png_structrp png_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_crc_skip,(png_structrp png_ptr,
-    png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_crc_finish,(png_structrp png_ptr),
-    PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_save_buffer,(png_structrp png_ptr),
-    PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_restore_buffer,(png_structrp png_ptr,
-    png_bytep buffer, png_size_t buffer_length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_IDAT,(png_structrp png_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_process_IDAT_data,(png_structrp png_ptr,
-    png_bytep buffer, png_size_t buffer_length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_process_row,(png_structrp png_ptr),
-    PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_handle_unknown,(png_structrp png_ptr,
-   png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_have_info,(png_structrp png_ptr,
-   png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_have_end,(png_structrp png_ptr,
-   png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_have_row,(png_structrp png_ptr,
-     png_bytep row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_end,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_process_some_data,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_read_push_finish_row,(png_structrp png_ptr),
-    PNG_EMPTY);
-#  ifdef PNG_READ_tEXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_push_handle_tEXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_tEXt,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-#  endif
-#  ifdef PNG_READ_zTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_push_handle_zTXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_zTXt,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-#  endif
-#  ifdef PNG_READ_iTXt_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_push_handle_iTXt,(png_structrp png_ptr,
-    png_inforp info_ptr, png_uint_32 length),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_push_read_iTXt,(png_structrp png_ptr,
-    png_inforp info_ptr),PNG_EMPTY);
-#  endif
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_chunk,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_sig,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_check_crc,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_crc_skip,
+                      (png_structrp png_ptr, png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_crc_finish,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_save_buffer,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_restore_buffer,
+                      (png_structrp png_ptr,
+                       png_bytep buffer,
+                       png_size_t buffer_length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_IDAT,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_process_IDAT_data,
+                      (png_structrp png_ptr,
+                       png_bytep buffer,
+                       png_size_t buffer_length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_process_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_handle_unknown,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_have_info,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_have_end,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_have_row,
+                      (png_structrp png_ptr, png_bytep row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_end,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_process_some_data,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_read_push_finish_row,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+#ifdef PNG_READ_tEXt_SUPPORTED
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_handle_tEXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_tEXt,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+#endif
+#ifdef PNG_READ_zTXt_SUPPORTED
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_handle_zTXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_zTXt,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+#endif
+#ifdef PNG_READ_iTXt_SUPPORTED
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_handle_iTXt,
+                      (png_structrp png_ptr,
+                       png_inforp info_ptr,
+                       png_uint_32 length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_push_read_iTXt,
+                      (png_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+#endif
 
 #endif /* PNG_PROGRESSIVE_READ_SUPPORTED */
 
 #ifdef PNG_MNG_FEATURES_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_do_read_intrapixel,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_do_write_intrapixel,(png_row_infop row_info,
-    png_bytep row),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_read_intrapixel,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_write_intrapixel,
+                      (png_row_infop row_info, png_bytep row),
+                      PNG_EMPTY);
 #endif
 
 /* Added at libpng version 1.6.0 */
 #ifdef PNG_GAMMA_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_colorspace_set_gamma,(png_const_structrp png_ptr,
-    png_colorspacerp colorspace, png_fixed_point gAMA), PNG_EMPTY);
-   /* Set the colorspace gamma with a value provided by the application or by
-    * the gAMA chunk on read.  The value will override anything set by an ICC
-    * profile.
-    */
-
-PNG_INTERNAL_FUNCTION(void,png_colorspace_sync_info,(png_const_structrp png_ptr,
-    png_inforp info_ptr), PNG_EMPTY);
-    /* Synchronize the info 'valid' flags with the colorspace */
-
-PNG_INTERNAL_FUNCTION(void,png_colorspace_sync,(png_const_structrp png_ptr,
-    png_inforp info_ptr), PNG_EMPTY);
-    /* Copy the png_struct colorspace to the info_struct and call the above to
-     * synchronize the flags.  Checks for NULL info_ptr and does nothing.
-     */
+PNG_INTERNAL_FUNCTION(void,
+                      png_colorspace_set_gamma,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       png_fixed_point gAMA),
+                      PNG_EMPTY);
+/* Set the colorspace gamma with a value provided by the application or by
+ * the gAMA chunk on read.  The value will override anything set by an ICC
+ * profile.
+ */
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_colorspace_sync_info,
+                      (png_const_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+/* Synchronize the info 'valid' flags with the colorspace */
+
+PNG_INTERNAL_FUNCTION(void,
+                      png_colorspace_sync,
+                      (png_const_structrp png_ptr, png_inforp info_ptr),
+                      PNG_EMPTY);
+/* Copy the png_struct colorspace to the info_struct and call the above to
+ * synchronize the flags.  Checks for NULL info_ptr and does nothing.
+ */
 #endif
 
 /* Added at libpng version 1.4.0 */
 #ifdef PNG_COLORSPACE_SUPPORTED
 /* These internal functions are for maintaining the colorspace structure within
  * a png_info or png_struct (or, indeed, both).
  */
-PNG_INTERNAL_FUNCTION(int,png_colorspace_set_chromaticities,
-   (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_xy *xy,
-    int preferred), PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_colorspace_set_chromaticities,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       const png_xy* xy,
+                       int preferred),
+                      PNG_EMPTY);
 
-PNG_INTERNAL_FUNCTION(int,png_colorspace_set_endpoints,
-   (png_const_structrp png_ptr, png_colorspacerp colorspace, const png_XYZ *XYZ,
-    int preferred), PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_colorspace_set_endpoints,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       const png_XYZ* XYZ,
+                       int preferred),
+                      PNG_EMPTY);
 
 #ifdef PNG_sRGB_SUPPORTED
-PNG_INTERNAL_FUNCTION(int,png_colorspace_set_sRGB,(png_const_structrp png_ptr,
-   png_colorspacerp colorspace, int intent), PNG_EMPTY);
-   /* This does set the colorspace gAMA and cHRM values too, but doesn't set the
-    * flags to write them, if it returns false there was a problem and an error
-    * message has already been output (but the colorspace may still need to be
-    * synced to record the invalid flag).
-    */
+PNG_INTERNAL_FUNCTION(int,
+                      png_colorspace_set_sRGB,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       int intent),
+                      PNG_EMPTY);
+/* This does set the colorspace gAMA and cHRM values too, but doesn't set the
+ * flags to write them, if it returns false there was a problem and an error
+ * message has already been output (but the colorspace may still need to be
+ * synced to record the invalid flag).
+ */
 #endif /* sRGB */
 
 #ifdef PNG_iCCP_SUPPORTED
-PNG_INTERNAL_FUNCTION(int,png_colorspace_set_ICC,(png_const_structrp png_ptr,
-   png_colorspacerp colorspace, png_const_charp name,
-   png_uint_32 profile_length, png_const_bytep profile, int color_type),
-   PNG_EMPTY);
-   /* The 'name' is used for information only */
+PNG_INTERNAL_FUNCTION(int,
+                      png_colorspace_set_ICC,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       png_const_charp name,
+                       png_uint_32 profile_length,
+                       png_const_bytep profile,
+                       int color_type),
+                      PNG_EMPTY);
+/* The 'name' is used for information only */
 
 /* Routines for checking parts of an ICC profile. */
-PNG_INTERNAL_FUNCTION(int,png_icc_check_length,(png_const_structrp png_ptr,
-   png_colorspacerp colorspace, png_const_charp name,
-   png_uint_32 profile_length), PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(int,png_icc_check_header,(png_const_structrp png_ptr,
-   png_colorspacerp colorspace, png_const_charp name,
-   png_uint_32 profile_length,
-   png_const_bytep profile /* first 132 bytes only */, int color_type),
-   PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(int,png_icc_check_tag_table,(png_const_structrp png_ptr,
-   png_colorspacerp colorspace, png_const_charp name,
-   png_uint_32 profile_length,
-   png_const_bytep profile /* header plus whole tag table */), PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_icc_check_length,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       png_const_charp name,
+                       png_uint_32 profile_length),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_icc_check_header,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       png_const_charp name,
+                       png_uint_32 profile_length,
+                       png_const_bytep profile /* first 132 bytes only */,
+                       int color_type),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(
+    int,
+    png_icc_check_tag_table,
+    (png_const_structrp png_ptr,
+     png_colorspacerp colorspace,
+     png_const_charp name,
+     png_uint_32 profile_length,
+     png_const_bytep profile /* header plus whole tag table */),
+    PNG_EMPTY);
 #ifdef PNG_sRGB_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_icc_set_sRGB,(
-   png_const_structrp png_ptr, png_colorspacerp colorspace,
-   png_const_bytep profile, uLong adler), PNG_EMPTY);
-   /* 'adler' is the Adler32 checksum of the uncompressed profile data. It may
-    * be zero to indicate that it is not available.  It is used, if provided,
-    * as a fast check on the profile when checking to see if it is sRGB.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_icc_set_sRGB,
+                      (png_const_structrp png_ptr,
+                       png_colorspacerp colorspace,
+                       png_const_bytep profile,
+                       uLong adler),
+                      PNG_EMPTY);
+/* 'adler' is the Adler32 checksum of the uncompressed profile data. It may
+ * be zero to indicate that it is not available.  It is used, if provided,
+ * as a fast check on the profile when checking to see if it is sRGB.
+ */
 #endif
 #endif /* iCCP */
 
 #ifdef PNG_READ_RGB_TO_GRAY_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_colorspace_set_rgb_coefficients,
-   (png_structrp png_ptr), PNG_EMPTY);
-   /* Set the rgb_to_gray coefficients from the colorspace Y values */
+PNG_INTERNAL_FUNCTION(void,
+                      png_colorspace_set_rgb_coefficients,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+/* Set the rgb_to_gray coefficients from the colorspace Y values */
 #endif /* READ_RGB_TO_GRAY */
 #endif /* COLORSPACE */
 
 /* Added at libpng version 1.4.0 */
-PNG_INTERNAL_FUNCTION(void,png_check_IHDR,(png_const_structrp png_ptr,
-    png_uint_32 width, png_uint_32 height, int bit_depth,
-    int color_type, int interlace_type, int compression_type,
-    int filter_type),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_check_IHDR,
+                      (png_const_structrp png_ptr,
+                       png_uint_32 width,
+                       png_uint_32 height,
+                       int bit_depth,
+                       int color_type,
+                       int interlace_type,
+                       int compression_type,
+                       int filter_type),
+                      PNG_EMPTY);
 
 /* Added at libpng version 1.5.10 */
 #if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
     defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_do_check_palette_indexes,
-   (png_structrp png_ptr, png_row_infop row_info),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_do_check_palette_indexes,
+                      (png_structrp png_ptr, png_row_infop row_info),
+                      PNG_EMPTY);
 #endif
 
 #if defined(PNG_FLOATING_POINT_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
-PNG_INTERNAL_FUNCTION(void,png_fixed_error,(png_const_structrp png_ptr,
-   png_const_charp name),PNG_NORETURN);
+PNG_INTERNAL_FUNCTION(void,
+                      png_fixed_error,
+                      (png_const_structrp png_ptr, png_const_charp name),
+                      PNG_NORETURN);
 #endif
 
 /* Puts 'string' into 'buffer' at buffer[pos], taking care never to overwrite
  * the end.  Always leaves the buffer nul terminated.  Never errors out (and
  * there is no error code.)
  */
-PNG_INTERNAL_FUNCTION(size_t,png_safecat,(png_charp buffer, size_t bufsize,
-   size_t pos, png_const_charp string),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(
+    size_t,
+    png_safecat,
+    (png_charp buffer, size_t bufsize, size_t pos, png_const_charp string),
+    PNG_EMPTY);
 
 /* Various internal functions to handle formatted warning messages, currently
  * only implemented for warnings.
  */
 #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED)
 /* Utility to dump an unsigned value into a buffer, given a start pointer and
  * and end pointer (which should point just *beyond* the end of the buffer!)
  * Returns the pointer to the start of the formatted string.  This utility only
  * does unsigned values.
  */
-PNG_INTERNAL_FUNCTION(png_charp,png_format_number,(png_const_charp start,
-   png_charp end, int format, png_alloc_size_t number),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(
+    png_charp,
+    png_format_number,
+    (png_const_charp start, png_charp end, int format, png_alloc_size_t number),
+    PNG_EMPTY);
 
 /* Convenience macro that takes an array: */
-#define PNG_FORMAT_NUMBER(buffer,format,number) \
-   png_format_number(buffer, buffer + (sizeof buffer), format, number)
+#define PNG_FORMAT_NUMBER(buffer, format, number) \
+  png_format_number(buffer, buffer + (sizeof buffer), format, number)
 
 /* Suggested size for a number buffer (enough for 64 bits and a sign!) */
 #define PNG_NUMBER_BUFFER_SIZE 24
 
 /* These are the integer formats currently supported, the name is formed from
  * the standard printf(3) format string.
  */
-#define PNG_NUMBER_FORMAT_u     1 /* chose unsigned API! */
-#define PNG_NUMBER_FORMAT_02u   2
-#define PNG_NUMBER_FORMAT_d     1 /* chose signed API! */
-#define PNG_NUMBER_FORMAT_02d   2
-#define PNG_NUMBER_FORMAT_x     3
-#define PNG_NUMBER_FORMAT_02x   4
+#define PNG_NUMBER_FORMAT_u 1 /* chose unsigned API! */
+#define PNG_NUMBER_FORMAT_02u 2
+#define PNG_NUMBER_FORMAT_d 1 /* chose signed API! */
+#define PNG_NUMBER_FORMAT_02d 2
+#define PNG_NUMBER_FORMAT_x 3
+#define PNG_NUMBER_FORMAT_02x 4
 #define PNG_NUMBER_FORMAT_fixed 5 /* choose the signed API */
 #endif
 
 #ifdef PNG_WARNINGS_SUPPORTED
 /* New defines and members adding in libpng-1.5.4 */
-#  define PNG_WARNING_PARAMETER_SIZE 32
-#  define PNG_WARNING_PARAMETER_COUNT 8 /* Maximum 9; see pngerror.c */
+#define PNG_WARNING_PARAMETER_SIZE 32
+#define PNG_WARNING_PARAMETER_COUNT 8 /* Maximum 9; see pngerror.c */
 
 /* An l-value of this type has to be passed to the APIs below to cache the
  * values of the parameters to a formatted warning message.
  */
-typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT][
-   PNG_WARNING_PARAMETER_SIZE];
+typedef char png_warning_parameters[PNG_WARNING_PARAMETER_COUNT]
+                                   [PNG_WARNING_PARAMETER_SIZE];
 
-PNG_INTERNAL_FUNCTION(void,png_warning_parameter,(png_warning_parameters p,
-   int number, png_const_charp string),PNG_EMPTY);
-   /* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters,
-    * including the trailing '\0'.
-    */
-PNG_INTERNAL_FUNCTION(void,png_warning_parameter_unsigned,
-   (png_warning_parameters p, int number, int format, png_alloc_size_t value),
-   PNG_EMPTY);
-   /* Use png_alloc_size_t because it is an unsigned type as big as any we
-    * need to output.  Use the following for a signed value.
-    */
-PNG_INTERNAL_FUNCTION(void,png_warning_parameter_signed,
-   (png_warning_parameters p, int number, int format, png_int_32 value),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_warning_parameter,
+                      (png_warning_parameters p,
+                       int number,
+                       png_const_charp string),
+                      PNG_EMPTY);
+/* Parameters are limited in size to PNG_WARNING_PARAMETER_SIZE characters,
+ * including the trailing '\0'.
+ */
+PNG_INTERNAL_FUNCTION(
+    void,
+    png_warning_parameter_unsigned,
+    (png_warning_parameters p, int number, int format, png_alloc_size_t value),
+    PNG_EMPTY);
+/* Use png_alloc_size_t because it is an unsigned type as big as any we
+ * need to output.  Use the following for a signed value.
+ */
+PNG_INTERNAL_FUNCTION(
+    void,
+    png_warning_parameter_signed,
+    (png_warning_parameters p, int number, int format, png_int_32 value),
+    PNG_EMPTY);
 
-PNG_INTERNAL_FUNCTION(void,png_formatted_warning,(png_const_structrp png_ptr,
-   png_warning_parameters p, png_const_charp message),PNG_EMPTY);
-   /* 'message' follows the X/Open approach of using @1, @2 to insert
-    * parameters previously supplied using the above functions.  Errors in
-    * specifying the parameters will simply result in garbage substitutions.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_formatted_warning,
+                      (png_const_structrp png_ptr,
+                       png_warning_parameters p,
+                       png_const_charp message),
+                      PNG_EMPTY);
+/* 'message' follows the X/Open approach of using @1, @2 to insert
+ * parameters previously supplied using the above functions.  Errors in
+ * specifying the parameters will simply result in garbage substitutions.
+ */
 #endif
 
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
 /* Application errors (new in 1.6); use these functions (declared below) for
  * errors in the parameters or order of API function calls on read.  The
  * 'warning' should be used for an error that can be handled completely; the
  * 'error' for one which can be handled safely but which may lose application
  * information or settings.
  *
  * By default these both result in a png_error call prior to release, while in a
  * released version the 'warning' is just a warning.  However if the application
  * explicitly disables benign errors (explicitly permitting the code to lose
  * information) they both turn into warnings.
  *
  * If benign errors aren't supported they end up as the corresponding base call
  * (png_warning or png_error.)
  */
-PNG_INTERNAL_FUNCTION(void,png_app_warning,(png_const_structrp png_ptr,
-   png_const_charp message),PNG_EMPTY);
-   /* The application provided invalid parameters to an API function or called
-    * an API function at the wrong time, libpng can completely recover.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_app_warning,
+                      (png_const_structrp png_ptr, png_const_charp message),
+                      PNG_EMPTY);
+/* The application provided invalid parameters to an API function or called
+ * an API function at the wrong time, libpng can completely recover.
+ */
 
-PNG_INTERNAL_FUNCTION(void,png_app_error,(png_const_structrp png_ptr,
-   png_const_charp message),PNG_EMPTY);
-   /* As above but libpng will ignore the call, or attempt some other partial
-    * recovery from the error.
-    */
+PNG_INTERNAL_FUNCTION(void,
+                      png_app_error,
+                      (png_const_structrp png_ptr, png_const_charp message),
+                      PNG_EMPTY);
+/* As above but libpng will ignore the call, or attempt some other partial
+ * recovery from the error.
+ */
 #else
-#  define png_app_warning(pp,s) png_warning(pp,s)
-#  define png_app_error(pp,s) png_error(pp,s)
+#define png_app_warning(pp, s) png_warning(pp, s)
+#define png_app_error(pp, s) png_error(pp, s)
 #endif
 
-PNG_INTERNAL_FUNCTION(void,png_chunk_report,(png_const_structrp png_ptr,
-   png_const_charp message, int error),PNG_EMPTY);
-   /* Report a recoverable issue in chunk data.  On read this is used to report
-    * a problem found while reading a particular chunk and the
-    * png_chunk_benign_error or png_chunk_warning function is used as
-    * appropriate.  On write this is used to report an error that comes from
-    * data set via an application call to a png_set_ API and png_app_error or
-    * png_app_warning is used as appropriate.
-    *
-    * The 'error' parameter must have one of the following values:
-    */
-#define PNG_CHUNK_WARNING     0 /* never an error */
+PNG_INTERNAL_FUNCTION(void,
+                      png_chunk_report,
+                      (png_const_structrp png_ptr,
+                       png_const_charp message,
+                       int error),
+                      PNG_EMPTY);
+/* Report a recoverable issue in chunk data.  On read this is used to report
+ * a problem found while reading a particular chunk and the
+ * png_chunk_benign_error or png_chunk_warning function is used as
+ * appropriate.  On write this is used to report an error that comes from
+ * data set via an application call to a png_set_ API and png_app_error or
+ * png_app_warning is used as appropriate.
+ *
+ * The 'error' parameter must have one of the following values:
+ */
+#define PNG_CHUNK_WARNING 0     /* never an error */
 #define PNG_CHUNK_WRITE_ERROR 1 /* an error only on write */
-#define PNG_CHUNK_ERROR       2 /* always an error */
+#define PNG_CHUNK_ERROR 2       /* always an error */
 
 /* ASCII to FP interfaces, currently only implemented if sCAL
  * support is required.
  */
 #if defined(PNG_sCAL_SUPPORTED)
 /* MAX_DIGITS is actually the maximum number of characters in an sCAL
  * width or height, derived from the precision (number of significant
  * digits - a build time settable option) and assumptions about the
  * maximum ridiculous exponent.
  */
-#define PNG_sCAL_MAX_DIGITS (PNG_sCAL_PRECISION+1/*.*/+1/*E*/+10/*exponent*/)
+#define PNG_sCAL_MAX_DIGITS \
+  (PNG_sCAL_PRECISION + 1 /*.*/ + 1 /*E*/ + 10 /*exponent*/)
 
 #ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_ascii_from_fp,(png_const_structrp png_ptr,
-   png_charp ascii, png_size_t size, double fp, unsigned int precision),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_ascii_from_fp,
+                      (png_const_structrp png_ptr,
+                       png_charp ascii,
+                       png_size_t size,
+                       double fp,
+                       unsigned int precision),
+                      PNG_EMPTY);
 #endif /* FLOATING_POINT */
 
 #ifdef PNG_FIXED_POINT_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_ascii_from_fixed,(png_const_structrp png_ptr,
-   png_charp ascii, png_size_t size, png_fixed_point fp),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_ascii_from_fixed,
+                      (png_const_structrp png_ptr,
+                       png_charp ascii,
+                       png_size_t size,
+                       png_fixed_point fp),
+                      PNG_EMPTY);
 #endif /* FIXED_POINT */
 #endif /* sCAL */
 
 #if defined(PNG_sCAL_SUPPORTED) || defined(PNG_pCAL_SUPPORTED)
 /* An internal API to validate the format of a floating point number.
  * The result is the index of the next character.  If the number is
  * not valid it will be the index of a character in the supposed number.
  *
  * The format of a number is defined in the PNG extensions specification
  * and this API is strictly conformant to that spec, not anyone elses!
@@ skipping 14 matching lines @@
  *
  *       PNG floating point numbers are not greedy.
  *
  *   Working this out requires *TWO* character lookahead (because of the
  *   sign), the parser does not do this - it will fail at the 'r' - this
  *   doesn't matter for PNG sCAL chunk values, but it requires more care
  *   if the value were ever to be embedded in something more complex.  Use
  *   ANSI-C strtod if you need the lookahead.
  */
 /* State table for the parser. */
-#define PNG_FP_INTEGER    0  /* before or in integer */
-#define PNG_FP_FRACTION   1  /* before or in fraction */
-#define PNG_FP_EXPONENT   2  /* before or in exponent */
-#define PNG_FP_STATE      3  /* mask for the above */
-#define PNG_FP_SAW_SIGN   4  /* Saw +/- in current state */
-#define PNG_FP_SAW_DIGIT  8  /* Saw a digit in current state */
-#define PNG_FP_SAW_DOT   16  /* Saw a dot in current state */
-#define PNG_FP_SAW_E     32  /* Saw an E (or e) in current state */
-#define PNG_FP_SAW_ANY   60  /* Saw any of the above 4 */
+#define PNG_FP_INTEGER 0   /* before or in integer */
+#define PNG_FP_FRACTION 1  /* before or in fraction */
+#define PNG_FP_EXPONENT 2  /* before or in exponent */
+#define PNG_FP_STATE 3     /* mask for the above */
+#define PNG_FP_SAW_SIGN 4  /* Saw +/- in current state */
+#define PNG_FP_SAW_DIGIT 8 /* Saw a digit in current state */
+#define PNG_FP_SAW_DOT 16  /* Saw a dot in current state */
+#define PNG_FP_SAW_E 32    /* Saw an E (or e) in current state */
+#define PNG_FP_SAW_ANY 60  /* Saw any of the above 4 */
 
 /* These three values don't affect the parser.  They are set but not used.
  */
-#define PNG_FP_WAS_VALID 64  /* Preceding substring is a valid fp number */
-#define PNG_FP_NEGATIVE 128  /* A negative number, including "-0" */
-#define PNG_FP_NONZERO  256  /* A non-zero value */
-#define PNG_FP_STICKY   448  /* The above three flags */
+#define PNG_FP_WAS_VALID 64 /* Preceding substring is a valid fp number */
+#define PNG_FP_NEGATIVE 128 /* A negative number, including "-0" */
+#define PNG_FP_NONZERO 256  /* A non-zero value */
+#define PNG_FP_STICKY 448   /* The above three flags */
 
 /* This is available for the caller to store in 'state' if required.  Do not
  * call the parser after setting it (the parser sometimes clears it.)
  */
-#define PNG_FP_INVALID  512  /* Available for callers as a distinct value */
+#define PNG_FP_INVALID 512 /* Available for callers as a distinct value */
 
 /* Result codes for the parser (boolean - true meants ok, false means
  * not ok yet.)
  */
-#define PNG_FP_MAYBE      0  /* The number may be valid in the future */
-#define PNG_FP_OK         1  /* The number is valid */
+#define PNG_FP_MAYBE 0 /* The number may be valid in the future */
+#define PNG_FP_OK 1    /* The number is valid */
 
 /* Tests on the sticky non-zero and negative flags.  To pass these checks
  * the state must also indicate that the whole number is valid - this is
  * achieved by testing PNG_FP_SAW_DIGIT (see the implementation for why this
  * is equivalent to PNG_FP_OK above.)
  */
 #define PNG_FP_NZ_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NEGATIVE | PNG_FP_NONZERO)
-   /* NZ_MASK: the string is valid and a non-zero negative value */
+/* NZ_MASK: the string is valid and a non-zero negative value */
 #define PNG_FP_Z_MASK (PNG_FP_SAW_DIGIT | PNG_FP_NONZERO)
-   /* Z MASK: the string is valid and a non-zero value. */
-   /* PNG_FP_SAW_DIGIT: the string is valid. */
-#define PNG_FP_IS_ZERO(state) (((state) & PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT)
-#define PNG_FP_IS_POSITIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_Z_MASK)
-#define PNG_FP_IS_NEGATIVE(state) (((state) & PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK)
+/* Z MASK: the string is valid and a non-zero value. */
+/* PNG_FP_SAW_DIGIT: the string is valid. */
+#define PNG_FP_IS_ZERO(state) (((state)&PNG_FP_Z_MASK) == PNG_FP_SAW_DIGIT)
+#define PNG_FP_IS_POSITIVE(state) (((state)&PNG_FP_NZ_MASK) == PNG_FP_Z_MASK)
+#define PNG_FP_IS_NEGATIVE(state) (((state)&PNG_FP_NZ_MASK) == PNG_FP_NZ_MASK)
 
 /* The actual parser.  This can be called repeatedly. It updates
  * the index into the string and the state variable (which must
  * be initialized to 0).  It returns a result code, as above.  There
  * is no point calling the parser any more if it fails to advance to
  * the end of the string - it is stuck on an invalid character (or
  * terminated by '\0').
  *
  * Note that the pointer will consume an E or even an E+ and then leave
  * a 'maybe' state even though a preceding integer.fraction is valid.
  * The PNG_FP_WAS_VALID flag indicates that a preceding substring was
  * a valid number.  It's possible to recover from this by calling
  * the parser again (from the start, with state 0) but with a string
  * that omits the last character (i.e. set the size to the index of
  * the problem character.)  This has not been tested within libpng.
  */
-PNG_INTERNAL_FUNCTION(int,png_check_fp_number,(png_const_charp string,
-   png_size_t size, int *statep, png_size_tp whereami),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_check_fp_number,
+                      (png_const_charp string,
+                       png_size_t size,
+                       int* statep,
+                       png_size_tp whereami),
+                      PNG_EMPTY);
 
 /* This is the same but it checks a complete string and returns true
  * only if it just contains a floating point number.  As of 1.5.4 this
  * function also returns the state at the end of parsing the number if
  * it was valid (otherwise it returns 0.)  This can be used for testing
  * for negative or zero values using the sticky flag.
  */
-PNG_INTERNAL_FUNCTION(int,png_check_fp_string,(png_const_charp string,
-   png_size_t size),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_check_fp_string,
+                      (png_const_charp string, png_size_t size),
+                      PNG_EMPTY);
 #endif /* pCAL || sCAL */
 
-#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
-    defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
+#if defined(PNG_READ_GAMMA_SUPPORTED) ||       \
+    defined(PNG_INCH_CONVERSIONS_SUPPORTED) || \
+    defined(PNG_READ_pHYs_SUPPORTED)
 /* Added at libpng version 1.5.0 */
 /* This is a utility to provide a*times/div (rounded) and indicate
  * if there is an overflow.  The result is a boolean - false (0)
  * for overflow, true (1) if no overflow, in which case *res
  * holds the result.
  */
-PNG_INTERNAL_FUNCTION(int,png_muldiv,(png_fixed_point_p res, png_fixed_point a,
-   png_int_32 multiplied_by, png_int_32 divided_by),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_muldiv,
+                      (png_fixed_point_p res,
+                       png_fixed_point a,
+                       png_int_32 multiplied_by,
+                       png_int_32 divided_by),
+                      PNG_EMPTY);
 #endif
 
 #if defined(PNG_READ_GAMMA_SUPPORTED) || defined(PNG_INCH_CONVERSIONS_SUPPORTED)
 /* Same deal, but issue a warning on overflow and return 0. */
-PNG_INTERNAL_FUNCTION(png_fixed_point,png_muldiv_warn,
-   (png_const_structrp png_ptr, png_fixed_point a, png_int_32 multiplied_by,
-   png_int_32 divided_by),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_fixed_point,
+                      png_muldiv_warn,
+                      (png_const_structrp png_ptr,
+                       png_fixed_point a,
+                       png_int_32 multiplied_by,
+                       png_int_32 divided_by),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_GAMMA_SUPPORTED
 /* Calculate a reciprocal - used for gamma values.  This returns
  * 0 if the argument is 0 in order to maintain an undefined value;
  * there are no warnings.
  */
-PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal,(png_fixed_point a),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_fixed_point,
+                      png_reciprocal,
+                      (png_fixed_point a),
+                      PNG_EMPTY);
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 /* The same but gives a reciprocal of the product of two fixed point
  * values.  Accuracy is suitable for gamma calculations but this is
  * not exact - use png_muldiv for that.  Only required at present on read.
  */
-PNG_INTERNAL_FUNCTION(png_fixed_point,png_reciprocal2,(png_fixed_point a,
-   png_fixed_point b),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_fixed_point,
+                      png_reciprocal2,
+                      (png_fixed_point a, png_fixed_point b),
+                      PNG_EMPTY);
 #endif
 
 /* Return true if the gamma value is significantly different from 1.0 */
-PNG_INTERNAL_FUNCTION(int,png_gamma_significant,(png_fixed_point gamma_value),
-   PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_gamma_significant,
+                      (png_fixed_point gamma_value),
+                      PNG_EMPTY);
 #endif
 
 #ifdef PNG_READ_GAMMA_SUPPORTED
 /* Internal fixed point gamma correction.  These APIs are called as
  * required to convert single values - they don't need to be fast,
  * they are not used when processing image pixel values.
  *
  * While the input is an 'unsigned' value it must actually be the
  * correct bit value - 0..255 or 0..65535 as required.
  */
-PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_correct,(png_structrp png_ptr,
-   unsigned int value, png_fixed_point gamma_value),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(png_uint_16,png_gamma_16bit_correct,(unsigned int value,
-   png_fixed_point gamma_value),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(png_byte,png_gamma_8bit_correct,(unsigned int value,
-   png_fixed_point gamma_value),PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_destroy_gamma_table,(png_structrp png_ptr),
-   PNG_EMPTY);
-PNG_INTERNAL_FUNCTION(void,png_build_gamma_table,(png_structrp png_ptr,
-   int bit_depth),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_uint_16,
+                      png_gamma_correct,
+                      (png_structrp png_ptr,
+                       unsigned int value,
+                       png_fixed_point gamma_value),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_uint_16,
+                      png_gamma_16bit_correct,
+                      (unsigned int value, png_fixed_point gamma_value),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(png_byte,
+                      png_gamma_8bit_correct,
+                      (unsigned int value, png_fixed_point gamma_value),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_destroy_gamma_table,
+                      (png_structrp png_ptr),
+                      PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_build_gamma_table,
+                      (png_structrp png_ptr, int bit_depth),
+                      PNG_EMPTY);
 #endif
 
 /* SIMPLIFIED READ/WRITE SUPPORT */
-#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
-   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) || \
+    defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
 /* The internal structure that png_image::opaque points to. */
-typedef struct png_control
-{
-   png_structp png_ptr;
-   png_infop   info_ptr;
-   png_voidp   error_buf;           /* Always a jmp_buf at present. */
+typedef struct png_control {
+  png_structp png_ptr;
+  png_infop info_ptr;
+  png_voidp error_buf; /* Always a jmp_buf at present. */
 
-   png_const_bytep memory;          /* Memory buffer. */
-   png_size_t      size;            /* Size of the memory buffer. */
+  png_const_bytep memory; /* Memory buffer. */
+  png_size_t size;        /* Size of the memory buffer. */
 
-   unsigned int for_write       :1; /* Otherwise it is a read structure */
-   unsigned int owned_file      :1; /* We own the file in io_ptr */
+  unsigned int for_write : 1;  /* Otherwise it is a read structure */
+  unsigned int owned_file : 1; /* We own the file in io_ptr */
 } png_control;
 
 /* Return the pointer to the jmp_buf from a png_control: necessary because C
  * does not reveal the type of the elements of jmp_buf.
  */
 #ifdef __cplusplus
-#  define png_control_jmp_buf(pc) (((jmp_buf*)((pc)->error_buf))[0])
+#define png_control_jmp_buf(pc) (((jmp_buf*)((pc)->error_buf))[0])
 #else
-#  define png_control_jmp_buf(pc) ((pc)->error_buf)
+#define png_control_jmp_buf(pc) ((pc)->error_buf)
 #endif
 
 /* Utility to safely execute a piece of libpng code catching and logging any
  * errors that might occur.  Returns true on success, false on failure (either
  * of the function or as a result of a png_error.)
  */
-PNG_INTERNAL_FUNCTION(void,png_safe_error,(png_structp png_ptr,
-   png_const_charp error_message),PNG_NORETURN);
+PNG_INTERNAL_FUNCTION(void,
+                      png_safe_error,
+                      (png_structp png_ptr, png_const_charp error_message),
+                      PNG_NORETURN);
 
 #ifdef PNG_WARNINGS_SUPPORTED
-PNG_INTERNAL_FUNCTION(void,png_safe_warning,(png_structp png_ptr,
-   png_const_charp warning_message),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(void,
+                      png_safe_warning,
+                      (png_structp png_ptr, png_const_charp warning_message),
+                      PNG_EMPTY);
 #else
-#  define png_safe_warning 0/*dummy argument*/
+#define png_safe_warning 0 /*dummy argument*/
 #endif
 
-PNG_INTERNAL_FUNCTION(int,png_safe_execute,(png_imagep image,
-   int (*function)(png_voidp), png_voidp arg),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_safe_execute,
+                      (png_imagep image,
+                       int (*function)(png_voidp),
+                       png_voidp arg),
+                      PNG_EMPTY);
 
 /* Utility to log an error; this also cleans up the png_image; the function
  * always returns 0 (false).
  */
-PNG_INTERNAL_FUNCTION(int,png_image_error,(png_imagep image,
-   png_const_charp error_message),PNG_EMPTY);
+PNG_INTERNAL_FUNCTION(int,
+                      png_image_error,
+                      (png_imagep image, png_const_charp error_message),
+                      PNG_EMPTY);
 
 #ifndef PNG_SIMPLIFIED_READ_SUPPORTED
 /* png_image_free is used by the write code but not exported */
 PNG_INTERNAL_FUNCTION(void, png_image_free, (png_imagep image), PNG_EMPTY);
 #endif /* !SIMPLIFIED_READ */
 
 #endif /* SIMPLIFIED READ/WRITE */
 
 /* These are initialization functions for hardware specific PNG filter
  * optimizations; list these here then select the appropriate one at compile
  * time using the macro PNG_FILTER_OPTIMIZATIONS.  If the macro is not defined
  * the generic code is used.
  */
 #ifdef PNG_FILTER_OPTIMIZATIONS
-PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr,
-   unsigned int bpp), PNG_EMPTY);
-   /* Just declare the optimization that will be used */
+PNG_INTERNAL_FUNCTION(void,
+                      PNG_FILTER_OPTIMIZATIONS,
+                      (png_structp png_ptr, unsigned int bpp),
+                      PNG_EMPTY);
+/* Just declare the optimization that will be used */
 #else
-   /* List *all* the possible optimizations here - this branch is required if
-    * the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
-    * CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
-    */
-PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
-   (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
+/* List *all* the possible optimizations here - this branch is required if
+ * the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
+ * CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
+ */
+PNG_INTERNAL_FUNCTION(void,
+                      png_init_filter_functions_neon,
+                      (png_structp png_ptr, unsigned int bpp),
+                      PNG_EMPTY);
 #endif
 
 /* Maintainer: Put new private prototypes here ^ */
 
 #include "pngdebug.h"
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif /* PNG_VERSION_INFO_ONLY */
 #endif /* PNGPRIV_H */