Update libjpeg_turbo to 1.4.90 from https://github.com/libjpeg-turbo/

jpeglib.h

 /*
  * jpeglib.h
  *
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1991-1998, Thomas G. Lane.
  * Modified 2002-2009 by Guido Vollbeding.
- * Modifications:
- * Copyright (C) 2009-2011, 2013-2014, D. R. Commander.
+ * libjpeg-turbo Modifications:
+ * Copyright (C) 2009-2011, 2013-2014, 2016, D. R. Commander.
  * Copyright (C) 2015, Google, Inc.
- * For conditions of distribution and use, see the accompanying README file.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
  *
  * This file defines the application interface for the JPEG library.
  * Most applications using the library need only include this file,
  * and perhaps jerror.h if they want to know the exact error codes.
  */
 
 #ifndef JPEGLIB_H
 #define JPEGLIB_H
 
-/* Begin chromium edits */
-#include "jpeglibmangler.h"
-/* End chromium edits */
-
 /*
  * First we include the configuration files that record how this
  * installation of the JPEG library is set up.  jconfig.h can be
  * generated automatically for many systems.  jmorecfg.h contains
  * manual configuration options that most people need not worry about.
  */
 
-#ifndef JCONFIG_INCLUDED        /* in case jinclude.h already did */
-#include "jconfig.h"            /* widely used configuration options */
+#ifndef JCONFIG_INCLUDED        /* in case jinclude.h already did */
+#include "jconfig.h"            /* widely used configuration options */
 #endif
-#include "jmorecfg.h"           /* seldom changed options */
+#include "jmorecfg.h"           /* seldom changed options */
 
 
 #ifdef __cplusplus
 #ifndef DONT_USE_EXTERN_C
 extern "C" {
 #endif
 #endif
 
 
 /* Various constants determining the sizes of things.
  * All of these are specified by the JPEG standard, so don't change them
  * if you want to be compatible.
  */
 
-#define DCTSIZE             8   /* The basic DCT block is 8x8 samples */
-#define DCTSIZE2            64  /* DCTSIZE squared; # of elements in a block */
-#define NUM_QUANT_TBLS      4   /* Quantization tables are numbered 0..3 */
-#define NUM_HUFF_TBLS       4   /* Huffman tables are numbered 0..3 */
-#define NUM_ARITH_TBLS      16  /* Arith-coding tables are numbered 0..15 */
-#define MAX_COMPS_IN_SCAN   4   /* JPEG limit on # of components in one scan */
-#define MAX_SAMP_FACTOR     4   /* JPEG limit on sampling factors */
+#define DCTSIZE             8   /* The basic DCT block is 8x8 samples */
+#define DCTSIZE2            64  /* DCTSIZE squared; # of elements in a block */
+#define NUM_QUANT_TBLS      4   /* Quantization tables are numbered 0..3 */
+#define NUM_HUFF_TBLS       4   /* Huffman tables are numbered 0..3 */
+#define NUM_ARITH_TBLS      16  /* Arith-coding tables are numbered 0..15 */
+#define MAX_COMPS_IN_SCAN   4   /* JPEG limit on # of components in one scan */
+#define MAX_SAMP_FACTOR     4   /* JPEG limit on sampling factors */
 /* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
  * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
  * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
  * to handle it.  We even let you do this from the jconfig.h file.  However,
  * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
  * sometimes emits noncompliant files doesn't mean you should too.
  */
 #define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
 #ifndef D_MAX_BLOCKS_IN_MCU
 #define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
 #endif
 
 
 /* Data structures for images (arrays of samples and of DCT coefficients).
- * On 80x86 machines, the image arrays are too big for near pointers,
- * but the pointer arrays can fit in near memory.
  */
 
-typedef JSAMPLE FAR *JSAMPROW;  /* ptr to one image row of pixel samples. */
-typedef JSAMPROW *JSAMPARRAY;   /* ptr to some rows (a 2-D sample array) */
-typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
+typedef JSAMPLE *JSAMPROW;      /* ptr to one image row of pixel samples. */
+typedef JSAMPROW *JSAMPARRAY;   /* ptr to some rows (a 2-D sample array) */
+typedef JSAMPARRAY *JSAMPIMAGE; /* a 3-D sample array: top index is color */
 
-typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
-typedef JBLOCK FAR *JBLOCKROW;  /* pointer to one row of coefficient blocks */
-typedef JBLOCKROW *JBLOCKARRAY;         /* a 2-D array of coefficient blocks */
-typedef JBLOCKARRAY *JBLOCKIMAGE;       /* a 3-D array of coefficient blocks */
+typedef JCOEF JBLOCK[DCTSIZE2]; /* one block of coefficients */
+typedef JBLOCK *JBLOCKROW;      /* pointer to one row of coefficient blocks */
+typedef JBLOCKROW *JBLOCKARRAY;         /* a 2-D array of coefficient blocks */
+typedef JBLOCKARRAY *JBLOCKIMAGE;       /* a 3-D array of coefficient blocks */
 
-typedef JCOEF FAR *JCOEFPTR;    /* useful in a couple of places */
+typedef JCOEF *JCOEFPTR;        /* useful in a couple of places */
 
 
 /* Types for JPEG compression parameters and working tables. */
 
 
 /* DCT coefficient quantization tables. */
 
 typedef struct {
   /* This array gives the coefficient quantizers in natural array order
    * (not the zigzag order in which they are stored in a JPEG DQT marker).
    * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
    */
-  UINT16 quantval[DCTSIZE2];    /* quantization step for each coefficient */
+  UINT16 quantval[DCTSIZE2];    /* quantization step for each coefficient */
   /* This field is used only during compression.  It's initialized FALSE when
    * the table is created, and set TRUE when it's been output to the file.
    * You could suppress output of a table by setting this to TRUE.
    * (See jpeg_suppress_tables for an example.)
    */
-  boolean sent_table;           /* TRUE when table has been output */
+  boolean sent_table;           /* TRUE when table has been output */
 } JQUANT_TBL;
 
 
 /* Huffman coding tables. */
 
 typedef struct {
   /* These two fields directly represent the contents of a JPEG DHT marker */
-  UINT8 bits[17];               /* bits[k] = # of symbols with codes of */
-                                /* length k bits; bits[0] is unused */
-  UINT8 huffval[256];           /* The symbols, in order of incr code length */
+  UINT8 bits[17];               /* bits[k] = # of symbols with codes of */
+                                /* length k bits; bits[0] is unused */
+  UINT8 huffval[256];           /* The symbols, in order of incr code length */
   /* This field is used only during compression.  It's initialized FALSE when
    * the table is created, and set TRUE when it's been output to the file.
    * You could suppress output of a table by setting this to TRUE.
    * (See jpeg_suppress_tables for an example.)
    */
-  boolean sent_table;           /* TRUE when table has been output */
+  boolean sent_table;           /* TRUE when table has been output */
 } JHUFF_TBL;
 
 
 /* Basic info about one component (color channel). */
 
 typedef struct {
   /* These values are fixed over the whole image. */
   /* For compression, they must be supplied by parameter setup; */
   /* for decompression, they are read from the SOF marker. */
-  int component_id;             /* identifier for this component (0..255) */
-  int component_index;          /* its index in SOF or cinfo->comp_info[] */
-  int h_samp_factor;            /* horizontal sampling factor (1..4) */
-  int v_samp_factor;            /* vertical sampling factor (1..4) */
-  int quant_tbl_no;             /* quantization table selector (0..3) */
+  int component_id;             /* identifier for this component (0..255) */
+  int component_index;          /* its index in SOF or cinfo->comp_info[] */
+  int h_samp_factor;            /* horizontal sampling factor (1..4) */
+  int v_samp_factor;            /* vertical sampling factor (1..4) */
+  int quant_tbl_no;             /* quantization table selector (0..3) */
   /* These values may vary between scans. */
   /* For compression, they must be supplied by parameter setup; */
   /* for decompression, they are read from the SOS marker. */
   /* The decompressor output side may not use these variables. */
-  int dc_tbl_no;                /* DC entropy table selector (0..3) */
-  int ac_tbl_no;                /* AC entropy table selector (0..3) */
-  
+  int dc_tbl_no;                /* DC entropy table selector (0..3) */
+  int ac_tbl_no;                /* AC entropy table selector (0..3) */
+
   /* Remaining fields should be treated as private by applications. */
-  
+
   /* These values are computed during compression or decompression startup: */
   /* Component's size in DCT blocks.
    * Any dummy blocks added to complete an MCU are not counted; therefore
    * these values do not depend on whether a scan is interleaved or not.
    */
   JDIMENSION width_in_blocks;
   JDIMENSION height_in_blocks;
   /* Size of a DCT block in samples.  Always DCTSIZE for compression.
    * For decompression this is the size of the output from one DCT block,
    * reflecting any scaling we choose to apply during the IDCT step.
-   * Values of 1,2,4,8 are likely to be supported.  Note that different
-   * components may receive different IDCT scalings.
+   * Values from 1 to 16 are supported.
+   * Note that different components may receive different IDCT scalings.
    */
 #if JPEG_LIB_VERSION >= 70
   int DCT_h_scaled_size;
   int DCT_v_scaled_size;
 #else
   int DCT_scaled_size;
 #endif
   /* The downsampled dimensions are the component's actual, unpadded number
    * of samples at the main buffer (preprocessing/compression interface), thus
    * downsampled_width = ceil(image_width * Hi/Hmax)
    * and similarly for height.  For decompression, IDCT scaling is included, so
    * downsampled_width = ceil(image_width * Hi/Hmax * DCT_[h_]scaled_size/DCTSIZE)
    */
-  JDIMENSION downsampled_width;  /* actual width in samples */
+  JDIMENSION downsampled_width;  /* actual width in samples */
   JDIMENSION downsampled_height; /* actual height in samples */
   /* This flag is used only for decompression.  In cases where some of the
    * components will be ignored (eg grayscale output from YCbCr image),
    * we can skip most computations for the unused components.
    */
-  boolean component_needed;     /* do we need the value of this component? */
+  boolean component_needed;     /* do we need the value of this component? */
 
   /* These values are computed before starting a scan of the component. */
   /* The decompressor output side may not use these variables. */
-  int MCU_width;                /* number of blocks per MCU, horizontally */
-  int MCU_height;               /* number of blocks per MCU, vertically */
-  int MCU_blocks;               /* MCU_width * MCU_height */
-  int MCU_sample_width;         /* MCU width in samples, MCU_width*DCT_[h_]scaled_size */
-  int last_col_width;           /* # of non-dummy blocks across in last MCU */
-  int last_row_height;          /* # of non-dummy blocks down in last MCU */
+  int MCU_width;                /* number of blocks per MCU, horizontally */
+  int MCU_height;               /* number of blocks per MCU, vertically */
+  int MCU_blocks;               /* MCU_width * MCU_height */
+  int MCU_sample_width;         /* MCU width in samples, MCU_width*DCT_[h_]scaled_size */
+  int last_col_width;           /* # of non-dummy blocks across in last MCU */
+  int last_row_height;          /* # of non-dummy blocks down in last MCU */
 
   /* Saved quantization table for component; NULL if none yet saved.
    * See jdinput.c comments about the need for this information.
    * This field is currently used only for decompression.
    */
-  JQUANT_TBL * quant_table;
+  JQUANT_TBL *quant_table;
 
   /* Private per-component storage for DCT or IDCT subsystem. */
-  void * dct_table;
+  void *dct_table;
 } jpeg_component_info;
 
 
 /* The script for encoding a multiple-scan file is an array of these: */
 
 typedef struct {
-  int comps_in_scan;            /* number of components encoded in this scan */
+  int comps_in_scan;            /* number of components encoded in this scan */
   int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
-  int Ss, Se;                   /* progressive JPEG spectral selection parms */
-  int Ah, Al;                   /* progressive JPEG successive approx. parms */
+  int Ss, Se;                   /* progressive JPEG spectral selection parms */
+  int Ah, Al;                   /* progressive JPEG successive approx. parms */
 } jpeg_scan_info;
 
 /* The decompressor can save APPn and COM markers in a list of these: */
 
-typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr;
+typedef struct jpeg_marker_struct *jpeg_saved_marker_ptr;
 
 struct jpeg_marker_struct {
-  jpeg_saved_marker_ptr next;   /* next in list, or NULL */
-  UINT8 marker;                 /* marker code: JPEG_COM, or JPEG_APP0+n */
-  unsigned int original_length; /* # bytes of data in the file */
-  unsigned int data_length;     /* # bytes of data saved at data[] */
-  JOCTET FAR * data;            /* the data contained in the marker */
+  jpeg_saved_marker_ptr next;   /* next in list, or NULL */
+  UINT8 marker;                 /* marker code: JPEG_COM, or JPEG_APP0+n */
+  unsigned int original_length; /* # bytes of data in the file */
+  unsigned int data_length;     /* # bytes of data saved at data[] */
+  JOCTET *data;                 /* the data contained in the marker */
   /* the marker length word is not counted in data_length or original_length */
 };
 
 /* Known color spaces. */
 
 #define JCS_EXTENSIONS 1
 #define JCS_ALPHA_EXTENSIONS 1
 
 typedef enum {
-        JCS_UNKNOWN,            /* error/unspecified */
-        JCS_GRAYSCALE,          /* monochrome */
-        JCS_RGB,                /* red/green/blue as specified by the RGB_RED, RGB_GREEN,
-                                   RGB_BLUE, and RGB_PIXELSIZE macros */
-        JCS_YCbCr,              /* Y/Cb/Cr (also known as YUV) */
-        JCS_CMYK,               /* C/M/Y/K */
-        JCS_YCCK,               /* Y/Cb/Cr/K */
-        JCS_EXT_RGB,            /* red/green/blue */
-        JCS_EXT_RGBX,           /* red/green/blue/x */
-        JCS_EXT_BGR,            /* blue/green/red */
-        JCS_EXT_BGRX,           /* blue/green/red/x */
-        JCS_EXT_XBGR,           /* x/blue/green/red */
-        JCS_EXT_XRGB,           /* x/red/green/blue */
-        /* When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX,
-           JCS_EXT_XBGR, or JCS_EXT_XRGB during decompression, the X byte is
-           undefined, and in order to ensure the best performance,
-           libjpeg-turbo can set that byte to whatever value it wishes.  Use
-           the following colorspace constants to ensure that the X byte is set
-           to 0xFF, so that it can be interpreted as an opaque alpha
-           channel. */
-        JCS_EXT_RGBA,           /* red/green/blue/alpha */
-        JCS_EXT_BGRA,           /* blue/green/red/alpha */
-        JCS_EXT_ABGR,           /* alpha/blue/green/red */
-        JCS_EXT_ARGB,           /* alpha/red/green/blue */
-  JCS_RGB565      /* 5-bit red/6-bit green/5-bit blue */
+  JCS_UNKNOWN,            /* error/unspecified */
+  JCS_GRAYSCALE,          /* monochrome */
+  JCS_RGB,                /* red/green/blue as specified by the RGB_RED,
+                             RGB_GREEN, RGB_BLUE, and RGB_PIXELSIZE macros */
+  JCS_YCbCr,              /* Y/Cb/Cr (also known as YUV) */
+  JCS_CMYK,               /* C/M/Y/K */
+  JCS_YCCK,               /* Y/Cb/Cr/K */
+  JCS_EXT_RGB,            /* red/green/blue */
+  JCS_EXT_RGBX,           /* red/green/blue/x */
+  JCS_EXT_BGR,            /* blue/green/red */
+  JCS_EXT_BGRX,           /* blue/green/red/x */
+  JCS_EXT_XBGR,           /* x/blue/green/red */
+  JCS_EXT_XRGB,           /* x/red/green/blue */
+  /* When out_color_space it set to JCS_EXT_RGBX, JCS_EXT_BGRX, JCS_EXT_XBGR,
+     or JCS_EXT_XRGB during decompression, the X byte is undefined, and in
+     order to ensure the best performance, libjpeg-turbo can set that byte to
+     whatever value it wishes.  Use the following colorspace constants to
+     ensure that the X byte is set to 0xFF, so that it can be interpreted as an
+     opaque alpha channel. */
+  JCS_EXT_RGBA,           /* red/green/blue/alpha */
+  JCS_EXT_BGRA,           /* blue/green/red/alpha */
+  JCS_EXT_ABGR,           /* alpha/blue/green/red */
+  JCS_EXT_ARGB,           /* alpha/red/green/blue */
+  JCS_RGB565              /* 5-bit red/6-bit green/5-bit blue */
 } J_COLOR_SPACE;
 
 /* DCT/IDCT algorithm options. */
 
 typedef enum {
-        JDCT_ISLOW,             /* slow but accurate integer algorithm */
-        JDCT_IFAST,             /* faster, less accurate integer method */
-        JDCT_FLOAT              /* floating-point: accurate, fast on fast HW */
+  JDCT_ISLOW,             /* slow but accurate integer algorithm */
+  JDCT_IFAST,             /* faster, less accurate integer method */
+  JDCT_FLOAT              /* floating-point: accurate, fast on fast HW */
 } J_DCT_METHOD;
 
-#ifndef JDCT_DEFAULT            /* may be overridden in jconfig.h */
+#ifndef JDCT_DEFAULT            /* may be overridden in jconfig.h */
 #define JDCT_DEFAULT  JDCT_ISLOW
 #endif
-#ifndef JDCT_FASTEST            /* may be overridden in jconfig.h */
+#ifndef JDCT_FASTEST            /* may be overridden in jconfig.h */
 #define JDCT_FASTEST  JDCT_IFAST
 #endif
 
 /* Dithering options for decompression. */
 
 typedef enum {
-        JDITHER_NONE,           /* no dithering */
-        JDITHER_ORDERED,        /* simple ordered dither */
-        JDITHER_FS              /* Floyd-Steinberg error diffusion dither */
+  JDITHER_NONE,           /* no dithering */
+  JDITHER_ORDERED,        /* simple ordered dither */
+  JDITHER_FS              /* Floyd-Steinberg error diffusion dither */
 } J_DITHER_MODE;
 
 
 /* Common fields between JPEG compression and decompression master structs. */
 
 #define jpeg_common_fields \
-  struct jpeg_error_mgr * err;  /* Error handler module */\
-  struct jpeg_memory_mgr * mem; /* Memory manager module */\
-  struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
-  void * client_data;           /* Available for use by application */\
-  boolean is_decompressor;      /* So common code can tell which is which */\
-  int global_state              /* For checking call sequence validity */
+  struct jpeg_error_mgr *err;   /* Error handler module */\
+  struct jpeg_memory_mgr *mem;  /* Memory manager module */\
+  struct jpeg_progress_mgr *progress; /* Progress monitor, or NULL if none */\
+  void *client_data;            /* Available for use by application */\
+  boolean is_decompressor;      /* So common code can tell which is which */\
+  int global_state              /* For checking call sequence validity */
 
 /* Routines that are to be used by both halves of the library are declared
  * to receive a pointer to this structure.  There are no actual instances of
  * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
  */
 struct jpeg_common_struct {
-  jpeg_common_fields;           /* Fields common to both master struct types */
+  jpeg_common_fields;           /* Fields common to both master struct types */
   /* Additional fields follow in an actual jpeg_compress_struct or
    * jpeg_decompress_struct.  All three structs must agree on these
    * initial fields!  (This would be a lot cleaner in C++.)
    */
 };
 
-typedef struct jpeg_common_struct * j_common_ptr;
-typedef struct jpeg_compress_struct * j_compress_ptr;
-typedef struct jpeg_decompress_struct * j_decompress_ptr;
+typedef struct jpeg_common_struct *j_common_ptr;
+typedef struct jpeg_compress_struct *j_compress_ptr;
+typedef struct jpeg_decompress_struct *j_decompress_ptr;
 
 
 /* Master record for a compression instance */
 
 struct jpeg_compress_struct {
-  jpeg_common_fields;           /* Fields shared with jpeg_decompress_struct */
+  jpeg_common_fields;           /* Fields shared with jpeg_decompress_struct */
 
   /* Destination for compressed data */
-  struct jpeg_destination_mgr * dest;
+  struct jpeg_destination_mgr *dest;
 
   /* Description of source image --- these fields must be filled in by
    * outer application before starting compression.  in_color_space must
    * be correct before you can even call jpeg_set_defaults().
    */
 
-  JDIMENSION image_width;       /* input image width */
-  JDIMENSION image_height;      /* input image height */
-  int input_components;         /* # of color components in input image */
-  J_COLOR_SPACE in_color_space; /* colorspace of input image */
+  JDIMENSION image_width;       /* input image width */
+  JDIMENSION image_height;      /* input image height */
+  int input_components;         /* # of color components in input image */
+  J_COLOR_SPACE in_color_space; /* colorspace of input image */
 
-  double input_gamma;           /* image gamma of input image */
+  double input_gamma;           /* image gamma of input image */
 
   /* Compression parameters --- these fields must be set before calling
    * jpeg_start_compress().  We recommend calling jpeg_set_defaults() to
    * initialize everything to reasonable defaults, then changing anything
    * the application specifically wants to change.  That way you won't get
    * burnt when new parameters are added.  Also note that there are several
    * helper routines to simplify changing parameters.
    */
 
 #if JPEG_LIB_VERSION >= 70
   unsigned int scale_num, scale_denom; /* fraction by which to scale image */
 
-  JDIMENSION jpeg_width;        /* scaled JPEG image width */
-  JDIMENSION jpeg_height;       /* scaled JPEG image height */
+  JDIMENSION jpeg_width;        /* scaled JPEG image width */
+  JDIMENSION jpeg_height;       /* scaled JPEG image height */
   /* Dimensions of actual JPEG image that will be written to file,
    * derived from input dimensions by scaling factors above.
    * These fields are computed by jpeg_start_compress().
    * You can also use jpeg_calc_jpeg_dimensions() to determine these values
    * in advance of calling jpeg_start_compress().
    */
 #endif
 
-  int data_precision;           /* bits of precision in image data */
+  int data_precision;           /* bits of precision in image data */
 
-  int num_components;           /* # of color components in JPEG image */
+  int num_components;           /* # of color components in JPEG image */
   J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
 
-  jpeg_component_info * comp_info;
+  jpeg_component_info *comp_info;
   /* comp_info[i] describes component that appears i'th in SOF */
 
-  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
+  JQUANT_TBL *quant_tbl_ptrs[NUM_QUANT_TBLS];
 #if JPEG_LIB_VERSION >= 70
   int q_scale_factor[NUM_QUANT_TBLS];
 #endif
   /* ptrs to coefficient quantization tables, or NULL if not defined,
    * and corresponding scale factors (percentage, initialized 100).
    */
 
-  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
   /* ptrs to Huffman coding tables, or NULL if not defined */
 
   UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
   UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
   UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
 
-  int num_scans;                /* # of entries in scan_info array */
-  const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
+  int num_scans;                /* # of entries in scan_info array */
+  const jpeg_scan_info *scan_info; /* script for multi-scan file, or NULL */
   /* The default value of scan_info is NULL, which causes a single-scan
    * sequential JPEG file to be emitted.  To create a multi-scan file,
    * set num_scans and scan_info to point to an array of scan definitions.
    */
 
-  boolean raw_data_in;          /* TRUE=caller supplies downsampled data */
-  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
-  boolean optimize_coding;      /* TRUE=optimize entropy encoding parms */
-  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
+  boolean raw_data_in;          /* TRUE=caller supplies downsampled data */
+  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
+  boolean optimize_coding;      /* TRUE=optimize entropy encoding parms */
+  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
 #if JPEG_LIB_VERSION >= 70
   boolean do_fancy_downsampling; /* TRUE=apply fancy downsampling */
 #endif
-  int smoothing_factor;         /* 1..100, or 0 for no input smoothing */
-  J_DCT_METHOD dct_method;      /* DCT algorithm selector */
+  int smoothing_factor;         /* 1..100, or 0 for no input smoothing */
+  J_DCT_METHOD dct_method;      /* DCT algorithm selector */
 
   /* The restart interval can be specified in absolute MCUs by setting
    * restart_interval, or in MCU rows by setting restart_in_rows
    * (in which case the correct restart_interval will be figured
    * for each scan).
    */
   unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
-  int restart_in_rows;          /* if > 0, MCU rows per restart interval */
+  int restart_in_rows;          /* if > 0, MCU rows per restart interval */
 
   /* Parameters controlling emission of special markers. */
 
-  boolean write_JFIF_header;    /* should a JFIF marker be written? */
-  UINT8 JFIF_major_version;     /* What to write for the JFIF version number */
+  boolean write_JFIF_header;    /* should a JFIF marker be written? */
+  UINT8 JFIF_major_version;     /* What to write for the JFIF version number */
   UINT8 JFIF_minor_version;
   /* These three values are not used by the JPEG code, merely copied */
   /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
   /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
   /* ratio is defined by X_density/Y_density even when density_unit=0. */
-  UINT8 density_unit;           /* JFIF code for pixel size units */
-  UINT16 X_density;             /* Horizontal pixel density */
-  UINT16 Y_density;             /* Vertical pixel density */
-  boolean write_Adobe_marker;   /* should an Adobe marker be written? */
-  
+  UINT8 density_unit;           /* JFIF code for pixel size units */
+  UINT16 X_density;             /* Horizontal pixel density */
+  UINT16 Y_density;             /* Vertical pixel density */
+  boolean write_Adobe_marker;   /* should an Adobe marker be written? */
+
   /* State variable: index of next scanline to be written to
    * jpeg_write_scanlines().  Application may use this to control its
    * processing loop, e.g., "while (next_scanline < image_height)".
    */
 
-  JDIMENSION next_scanline;     /* 0 .. image_height-1  */
+  JDIMENSION next_scanline;     /* 0 .. image_height-1  */
 
   /* Remaining fields are known throughout compressor, but generally
    * should not be touched by a surrounding application.
    */
 
   /*
    * These fields are computed during compression startup
    */
-  boolean progressive_mode;     /* TRUE if scan script uses progressive mode */
-  int max_h_samp_factor;        /* largest h_samp_factor */
-  int max_v_samp_factor;        /* largest v_samp_factor */
+  boolean progressive_mode;     /* TRUE if scan script uses progressive mode */
+  int max_h_samp_factor;        /* largest h_samp_factor */
+  int max_v_samp_factor;        /* largest v_samp_factor */
 
 #if JPEG_LIB_VERSION >= 70
-  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
-  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
+  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
+  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
 #endif
 
-  JDIMENSION total_iMCU_rows;   /* # of iMCU rows to be input to coef ctlr */
+  JDIMENSION total_iMCU_rows;   /* # of iMCU rows to be input to coef ctlr */
   /* The coefficient controller receives data in units of MCU rows as defined
    * for fully interleaved scans (whether the JPEG file is interleaved or not).
    * There are v_samp_factor * DCTSIZE sample rows of each component in an
    * "iMCU" (interleaved MCU) row.
    */
-  
+
   /*
    * These fields are valid during any one scan.
    * They describe the components and MCUs actually appearing in the scan.
    */
-  int comps_in_scan;            /* # of JPEG components in this scan */
-  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
+  int comps_in_scan;            /* # of JPEG components in this scan */
+  jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
   /* *cur_comp_info[i] describes component that appears i'th in SOS */
-  
-  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
-  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
-  
-  int blocks_in_MCU;            /* # of DCT blocks per MCU */
+
+  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
+  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
+
+  int blocks_in_MCU;            /* # of DCT blocks per MCU */
   int MCU_membership[C_MAX_BLOCKS_IN_MCU];
   /* MCU_membership[i] is index in cur_comp_info of component owning */
   /* i'th block in an MCU */
 
-  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
+  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
 
 #if JPEG_LIB_VERSION >= 80
-  int block_size;               /* the basic DCT block size: 1..16 */
-  const int * natural_order;    /* natural-order position array */
-  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) */
+  int block_size;               /* the basic DCT block size: 1..16 */
+  const int *natural_order;     /* natural-order position array */
+  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) */
 #endif
 
   /*
    * Links to compression subobjects (methods and private variables of modules)
    */
-  struct jpeg_comp_master * master;
-  struct jpeg_c_main_controller * main;
-  struct jpeg_c_prep_controller * prep;
-  struct jpeg_c_coef_controller * coef;
-  struct jpeg_marker_writer * marker;
-  struct jpeg_color_converter * cconvert;
-  struct jpeg_downsampler * downsample;
-  struct jpeg_forward_dct * fdct;
-  struct jpeg_entropy_encoder * entropy;
-  jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */
+  struct jpeg_comp_master *master;
+  struct jpeg_c_main_controller *main;
+  struct jpeg_c_prep_controller *prep;
+  struct jpeg_c_coef_controller *coef;
+  struct jpeg_marker_writer *marker;
+  struct jpeg_color_converter *cconvert;
+  struct jpeg_downsampler *downsample;
+  struct jpeg_forward_dct *fdct;
+  struct jpeg_entropy_encoder *entropy;
+  jpeg_scan_info *script_space; /* workspace for jpeg_simple_progression */
   int script_space_size;
 };
 
 
 /* Master record for a decompression instance */
 
 struct jpeg_decompress_struct {
-  jpeg_common_fields;           /* Fields shared with jpeg_compress_struct */
+  jpeg_common_fields;           /* Fields shared with jpeg_compress_struct */
 
   /* Source of compressed data */
-  struct jpeg_source_mgr * src;
+  struct jpeg_source_mgr *src;
 
   /* Basic description of image --- filled in by jpeg_read_header(). */
   /* Application may inspect these values to decide how to process image. */
 
-  JDIMENSION image_width;       /* nominal image width (from SOF marker) */
-  JDIMENSION image_height;      /* nominal image height */
-  int num_components;           /* # of color components in JPEG image */
+  JDIMENSION image_width;       /* nominal image width (from SOF marker) */
+  JDIMENSION image_height;      /* nominal image height */
+  int num_components;           /* # of color components in JPEG image */
   J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
 
   /* Decompression processing parameters --- these fields must be set before
    * calling jpeg_start_decompress().  Note that jpeg_read_header() initializes
    * them to default values.
    */
 
   J_COLOR_SPACE out_color_space; /* colorspace for output */
 
   unsigned int scale_num, scale_denom; /* fraction by which to scale image */
 
-  double output_gamma;          /* image gamma wanted in output */
+  double output_gamma;          /* image gamma wanted in output */
 
-  boolean buffered_image;       /* TRUE=multiple output passes */
-  boolean raw_data_out;         /* TRUE=downsampled data wanted */
+  boolean buffered_image;       /* TRUE=multiple output passes */
+  boolean raw_data_out;         /* TRUE=downsampled data wanted */
 
-  J_DCT_METHOD dct_method;      /* IDCT algorithm selector */
-  boolean do_fancy_upsampling;  /* TRUE=apply fancy upsampling */
-  boolean do_block_smoothing;   /* TRUE=apply interblock smoothing */
+  J_DCT_METHOD dct_method;      /* IDCT algorithm selector */
+  boolean do_fancy_upsampling;  /* TRUE=apply fancy upsampling */
+  boolean do_block_smoothing;   /* TRUE=apply interblock smoothing */
 
-  boolean quantize_colors;      /* TRUE=colormapped output wanted */
+  boolean quantize_colors;      /* TRUE=colormapped output wanted */
   /* the following are ignored if not quantize_colors: */
-  J_DITHER_MODE dither_mode;    /* type of color dithering to use */
-  boolean two_pass_quantize;    /* TRUE=use two-pass color quantization */
-  int desired_number_of_colors; /* max # colors to use in created colormap */
+  J_DITHER_MODE dither_mode;    /* type of color dithering to use */
+  boolean two_pass_quantize;    /* TRUE=use two-pass color quantization */
+  int desired_number_of_colors; /* max # colors to use in created colormap */
   /* these are significant only in buffered-image mode: */
-  boolean enable_1pass_quant;   /* enable future use of 1-pass quantizer */
+  boolean enable_1pass_quant;   /* enable future use of 1-pass quantizer */
   boolean enable_external_quant;/* enable future use of external colormap */
-  boolean enable_2pass_quant;   /* enable future use of 2-pass quantizer */
+  boolean enable_2pass_quant;   /* enable future use of 2-pass quantizer */
 
   /* Description of actual output image that will be returned to application.
    * These fields are computed by jpeg_start_decompress().
    * You can also use jpeg_calc_output_dimensions() to determine these values
    * in advance of calling jpeg_start_decompress().
    */
 
-  JDIMENSION output_width;      /* scaled image width */
-  JDIMENSION output_height;     /* scaled image height */
-  int out_color_components;     /* # of color components in out_color_space */
-  int output_components;        /* # of color components returned */
+  JDIMENSION output_width;      /* scaled image width */
+  JDIMENSION output_height;     /* scaled image height */
+  int out_color_components;     /* # of color components in out_color_space */
+  int output_components;        /* # of color components returned */
   /* output_components is 1 (a colormap index) when quantizing colors;
    * otherwise it equals out_color_components.
    */
-  int rec_outbuf_height;        /* min recommended height of scanline buffer */
+  int rec_outbuf_height;        /* min recommended height of scanline buffer */
   /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
    * high, space and time will be wasted due to unnecessary data copying.
    * Usually rec_outbuf_height will be 1 or 2, at most 4.
    */
 
   /* When quantizing colors, the output colormap is described by these fields.
    * The application can supply a colormap by setting colormap non-NULL before
    * calling jpeg_start_decompress; otherwise a colormap is created during
    * jpeg_start_decompress or jpeg_start_output.
    * The map has out_color_components rows and actual_number_of_colors columns.
    */
-  int actual_number_of_colors;  /* number of entries in use */
-  JSAMPARRAY colormap;          /* The color map as a 2-D pixel array */
+  int actual_number_of_colors;  /* number of entries in use */
+  JSAMPARRAY colormap;          /* The color map as a 2-D pixel array */
 
   /* State variables: these variables indicate the progress of decompression.
    * The application may examine these but must not modify them.
    */
 
   /* Row index of next scanline to be read from jpeg_read_scanlines().
    * Application may use this to control its processing loop, e.g.,
    * "while (output_scanline < output_height)".
    */
-  JDIMENSION output_scanline;   /* 0 .. output_height-1  */
+  JDIMENSION output_scanline;   /* 0 .. output_height-1  */
 
   /* Current input scan number and number of iMCU rows completed in scan.
    * These indicate the progress of the decompressor input side.
    */
-  int input_scan_number;        /* Number of SOS markers seen so far */
-  JDIMENSION input_iMCU_row;    /* Number of iMCU rows completed */
+  int input_scan_number;        /* Number of SOS markers seen so far */
+  JDIMENSION input_iMCU_row;    /* Number of iMCU rows completed */
 
   /* The "output scan number" is the notional scan being displayed by the
    * output side.  The decompressor will not allow output scan/row number
    * to get ahead of input scan/row, but it can fall arbitrarily far behind.
    */
-  int output_scan_number;       /* Nominal scan number being displayed */
-  JDIMENSION output_iMCU_row;   /* Number of iMCU rows read */
+  int output_scan_number;       /* Nominal scan number being displayed */
+  JDIMENSION output_iMCU_row;   /* Number of iMCU rows read */
 
   /* Current progression status.  coef_bits[c][i] indicates the precision
    * with which component c's DCT coefficient i (in zigzag order) is known.
    * It is -1 when no data has yet been received, otherwise it is the point
    * transform (shift) value for the most recent scan of the coefficient
    * (thus, 0 at completion of the progression).
    * This pointer is NULL when reading a non-progressive file.
    */
-  int (*coef_bits)[DCTSIZE2];   /* -1 or current Al value for each coef */
+  int (*coef_bits)[DCTSIZE2];   /* -1 or current Al value for each coef */
 
   /* Internal JPEG parameters --- the application usually need not look at
    * these fields.  Note that the decompressor output side may not use
    * any parameters that can change between scans.
    */
 
   /* Quantization and Huffman tables are carried forward across input
    * datastreams when processing abbreviated JPEG datastreams.
    */
 
-  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
+  JQUANT_TBL *quant_tbl_ptrs[NUM_QUANT_TBLS];
   /* ptrs to coefficient quantization tables, or NULL if not defined */
 
-  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL *dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL *ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
   /* ptrs to Huffman coding tables, or NULL if not defined */
 
   /* These parameters are never carried across datastreams, since they
    * are given in SOF/SOS markers or defined to be reset by SOI.
    */
 
-  int data_precision;           /* bits of precision in image data */
+  int data_precision;           /* bits of precision in image data */
 
-  jpeg_component_info * comp_info;
+  jpeg_component_info *comp_info;
   /* comp_info[i] describes component that appears i'th in SOF */
 
 #if JPEG_LIB_VERSION >= 80
-  boolean is_baseline;          /* TRUE if Baseline SOF0 encountered */
+  boolean is_baseline;          /* TRUE if Baseline SOF0 encountered */
 #endif
-  boolean progressive_mode;     /* TRUE if SOFn specifies progressive mode */
-  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
+  boolean progressive_mode;     /* TRUE if SOFn specifies progressive mode */
+  boolean arith_code;           /* TRUE=arithmetic coding, FALSE=Huffman */
 
   UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
   UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
   UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
 
   unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
 
   /* These fields record data obtained from optional markers recognized by
    * the JPEG library.
    */
-  boolean saw_JFIF_marker;      /* TRUE iff a JFIF APP0 marker was found */
+  boolean saw_JFIF_marker;      /* TRUE iff a JFIF APP0 marker was found */
   /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
-  UINT8 JFIF_major_version;     /* JFIF version number */
+  UINT8 JFIF_major_version;     /* JFIF version number */
   UINT8 JFIF_minor_version;
-  UINT8 density_unit;           /* JFIF code for pixel size units */
-  UINT16 X_density;             /* Horizontal pixel density */
-  UINT16 Y_density;             /* Vertical pixel density */
-  boolean saw_Adobe_marker;     /* TRUE iff an Adobe APP14 marker was found */
-  UINT8 Adobe_transform;        /* Color transform code from Adobe marker */
+  UINT8 density_unit;           /* JFIF code for pixel size units */
+  UINT16 X_density;             /* Horizontal pixel density */
+  UINT16 Y_density;             /* Vertical pixel density */
+  boolean saw_Adobe_marker;     /* TRUE iff an Adobe APP14 marker was found */
+  UINT8 Adobe_transform;        /* Color transform code from Adobe marker */
 
-  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
+  boolean CCIR601_sampling;     /* TRUE=first samples are cosited */
 
   /* Aside from the specific data retained from APPn markers known to the
    * library, the uninterpreted contents of any or all APPn and COM markers
    * can be saved in a list for examination by the application.
    */
   jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */
 
   /* Remaining fields are known throughout decompressor, but generally
    * should not be touched by a surrounding application.
    */
 
   /*
    * These fields are computed during decompression startup
    */
-  int max_h_samp_factor;        /* largest h_samp_factor */
-  int max_v_samp_factor;        /* largest v_samp_factor */
+  int max_h_samp_factor;        /* largest h_samp_factor */
+  int max_v_samp_factor;        /* largest v_samp_factor */
 
 #if JPEG_LIB_VERSION >= 70
-  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
-  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
+  int min_DCT_h_scaled_size;    /* smallest DCT_h_scaled_size of any component */
+  int min_DCT_v_scaled_size;    /* smallest DCT_v_scaled_size of any component */
 #else
-  int min_DCT_scaled_size;      /* smallest DCT_scaled_size of any component */
+  int min_DCT_scaled_size;      /* smallest DCT_scaled_size of any component */
 #endif
 
-  JDIMENSION total_iMCU_rows;   /* # of iMCU rows in image */
+  JDIMENSION total_iMCU_rows;   /* # of iMCU rows in image */
   /* The coefficient controller's input and output progress is measured in
    * units of "iMCU" (interleaved MCU) rows.  These are the same as MCU rows
    * in fully interleaved JPEG scans, but are used whether the scan is
    * interleaved or not.  We define an iMCU row as v_samp_factor DCT block
    * rows of each component.  Therefore, the IDCT output contains
    * v_samp_factor*DCT_[v_]scaled_size sample rows of a component per iMCU row.
    */
 
-  JSAMPLE * sample_range_limit; /* table for fast range-limiting */
+  JSAMPLE *sample_range_limit;  /* table for fast range-limiting */
 
   /*
    * These fields are valid during any one scan.
    * They describe the components and MCUs actually appearing in the scan.
    * Note that the decompressor output side must not use these fields.
    */
-  int comps_in_scan;            /* # of JPEG components in this scan */
-  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
+  int comps_in_scan;            /* # of JPEG components in this scan */
+  jpeg_component_info *cur_comp_info[MAX_COMPS_IN_SCAN];
   /* *cur_comp_info[i] describes component that appears i'th in SOS */
 
-  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
-  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
+  JDIMENSION MCUs_per_row;      /* # of MCUs across the image */
+  JDIMENSION MCU_rows_in_scan;  /* # of MCU rows in the image */
 
-  int blocks_in_MCU;            /* # of DCT blocks per MCU */
+  int blocks_in_MCU;            /* # of DCT blocks per MCU */
   int MCU_membership[D_MAX_BLOCKS_IN_MCU];
   /* MCU_membership[i] is index in cur_comp_info of component owning */
   /* i'th block in an MCU */
 
-  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
+  int Ss, Se, Ah, Al;           /* progressive JPEG parameters for scan */
 
 #if JPEG_LIB_VERSION >= 80
   /* These fields are derived from Se of first SOS marker.
    */
-  int block_size;               /* the basic DCT block size: 1..16 */
-  const int * natural_order; /* natural-order position array for entropy decode */
-  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) for entropy decode */
+  int block_size;               /* the basic DCT block size: 1..16 */
+  const int *natural_order; /* natural-order position array for entropy decode */
+  int lim_Se;                   /* min( Se, DCTSIZE2-1 ) for entropy decode */
 #endif
 
   /* This field is shared between entropy decoder and marker parser.
    * It is either zero or the code of a JPEG marker that has been
    * read from the data source, but has not yet been processed.
    */
   int unread_marker;
 
   /*
    * Links to decompression subobjects (methods, private variables of modules)
    */
-  struct jpeg_decomp_master * master;
-  struct jpeg_d_main_controller * main;
-  struct jpeg_d_coef_controller * coef;
-  struct jpeg_d_post_controller * post;
-  struct jpeg_input_controller * inputctl;
-  struct jpeg_marker_reader * marker;
-  struct jpeg_entropy_decoder * entropy;
-  struct jpeg_inverse_dct * idct;
-  struct jpeg_upsampler * upsample;
-  struct jpeg_color_deconverter * cconvert;
-  struct jpeg_color_quantizer * cquantize;
+  struct jpeg_decomp_master *master;
+  struct jpeg_d_main_controller *main;
+  struct jpeg_d_coef_controller *coef;
+  struct jpeg_d_post_controller *post;
+  struct jpeg_input_controller *inputctl;
+  struct jpeg_marker_reader *marker;
+  struct jpeg_entropy_decoder *entropy;
+  struct jpeg_inverse_dct *idct;
+  struct jpeg_upsampler *upsample;
+  struct jpeg_color_deconverter *cconvert;
+  struct jpeg_color_quantizer *cquantize;
 };
 
 
 /* "Object" declarations for JPEG modules that may be supplied or called
  * directly by the surrounding application.
  * As with all objects in the JPEG library, these structs only define the
  * publicly visible methods and state variables of a module.  Additional
  * private fields may exist after the public ones.
  */
 
 
 /* Error handler object */
 
 struct jpeg_error_mgr {
   /* Error exit handler: does not return to caller */
-  JMETHOD(void, error_exit, (j_common_ptr cinfo));
+  void (*error_exit) (j_common_ptr cinfo);
   /* Conditionally emit a trace or warning message */
-  JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
+  void (*emit_message) (j_common_ptr cinfo, int msg_level);
   /* Routine that actually outputs a trace or error message */
-  JMETHOD(void, output_message, (j_common_ptr cinfo));
+  void (*output_message) (j_common_ptr cinfo);
   /* Format a message string for the most recent JPEG error or message */
-  JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
-#define JMSG_LENGTH_MAX  200    /* recommended size of format_message buffer */
+  void (*format_message) (j_common_ptr cinfo, char *buffer);
+#define JMSG_LENGTH_MAX  200    /* recommended size of format_message buffer */
   /* Reset error state variables at start of a new image */
-  JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
-  
+  void (*reset_error_mgr) (j_common_ptr cinfo);
+
   /* The message ID code and any parameters are saved here.
    * A message can have one string parameter or up to 8 int parameters.
    */
   int msg_code;
 #define JMSG_STR_PARM_MAX  80
   union {
     int i[8];
     char s[JMSG_STR_PARM_MAX];
   } msg_parm;
-  
+
   /* Standard state variables for error facility */
-  
-  int trace_level;              /* max msg_level that will be displayed */
-  
+
+  int trace_level;              /* max msg_level that will be displayed */
+
   /* For recoverable corrupt-data errors, we emit a warning message,
    * but keep going unless emit_message chooses to abort.  emit_message
    * should count warnings in num_warnings.  The surrounding application
    * can check for bad data by seeing if num_warnings is nonzero at the
    * end of processing.
    */
-  long num_warnings;            /* number of corrupt-data warnings */
+  long num_warnings;            /* number of corrupt-data warnings */
 
   /* These fields point to the table(s) of error message strings.
    * An application can change the table pointer to switch to a different
    * message list (typically, to change the language in which errors are
    * reported).  Some applications may wish to add additional error codes
    * that will be handled by the JPEG library error mechanism; the second
    * table pointer is used for this purpose.
    *
    * First table includes all errors generated by JPEG library itself.
    * Error code 0 is reserved for a "no such error string" message.
    */
-  const char * const * jpeg_message_table; /* Library errors */
+  const char * const *jpeg_message_table; /* Library errors */
   int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */
   /* Second table can be added by application (see cjpeg/djpeg for example).
    * It contains strings numbered first_addon_message..last_addon_message.
    */
-  const char * const * addon_message_table; /* Non-library errors */
-  int first_addon_message;      /* code for first string in addon table */
-  int last_addon_message;       /* code for last string in addon table */
+  const char * const *addon_message_table; /* Non-library errors */
+  int first_addon_message;      /* code for first string in addon table */
+  int last_addon_message;       /* code for last string in addon table */
 };
 
 
 /* Progress monitor object */
 
 struct jpeg_progress_mgr {
-  JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
+  void (*progress_monitor) (j_common_ptr cinfo);
 
-  long pass_counter;            /* work units completed in this pass */
-  long pass_limit;              /* total number of work units in this pass */
-  int completed_passes;         /* passes completed so far */
-  int total_passes;             /* total number of passes expected */
+  long pass_counter;            /* work units completed in this pass */
+  long pass_limit;              /* total number of work units in this pass */
+  int completed_passes;         /* passes completed so far */
+  int total_passes;             /* total number of passes expected */
 };
 
 
 /* Data destination object for compression */
 
 struct jpeg_destination_mgr {
-  JOCTET * next_output_byte;    /* => next byte to write in buffer */
-  size_t free_in_buffer;        /* # of byte spaces remaining in buffer */
+  JOCTET *next_output_byte;     /* => next byte to write in buffer */
+  size_t free_in_buffer;        /* # of byte spaces remaining in buffer */
 
-  JMETHOD(void, init_destination, (j_compress_ptr cinfo));
-  JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
-  JMETHOD(void, term_destination, (j_compress_ptr cinfo));
+  void (*init_destination) (j_compress_ptr cinfo);
+  boolean (*empty_output_buffer) (j_compress_ptr cinfo);
+  void (*term_destination) (j_compress_ptr cinfo);
 };
 
 
 /* Data source object for decompression */
 
 struct jpeg_source_mgr {
-  const JOCTET * next_input_byte; /* => next byte to read from buffer */
-  size_t bytes_in_buffer;       /* # of bytes remaining in buffer */
+  const JOCTET *next_input_byte; /* => next byte to read from buffer */
+  size_t bytes_in_buffer;       /* # of bytes remaining in buffer */
 
-  JMETHOD(void, init_source, (j_decompress_ptr cinfo));
-  JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
-  JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
-  JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
-  JMETHOD(void, term_source, (j_decompress_ptr cinfo));
+  void (*init_source) (j_decompress_ptr cinfo);
+  boolean (*fill_input_buffer) (j_decompress_ptr cinfo);
+  void (*skip_input_data) (j_decompress_ptr cinfo, long num_bytes);
+  boolean (*resync_to_restart) (j_decompress_ptr cinfo, int desired);
+  void (*term_source) (j_decompress_ptr cinfo);
 };
 
 
 /* Memory manager object.
  * Allocates "small" objects (a few K total), "large" objects (tens of K),
  * and "really big" objects (virtual arrays with backing store if needed).
  * The memory manager does not allow individual objects to be freed; rather,
  * each created object is assigned to a pool, and whole pools can be freed
  * at once.  This is faster and more convenient than remembering exactly what
  * to free, especially where malloc()/free() are not too speedy.
  * NB: alloc routines never return NULL.  They exit to error_exit if not
  * successful.
  */
 
-#define JPOOL_PERMANENT 0       /* lasts until master record is destroyed */
-#define JPOOL_IMAGE     1       /* lasts until done with image/datastream */
-#define JPOOL_NUMPOOLS  2
+#define JPOOL_PERMANENT 0       /* lasts until master record is destroyed */
+#define JPOOL_IMAGE     1       /* lasts until done with image/datastream */
+#define JPOOL_NUMPOOLS  2
 
-typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
-typedef struct jvirt_barray_control * jvirt_barray_ptr;
+typedef struct jvirt_sarray_control *jvirt_sarray_ptr;
+typedef struct jvirt_barray_control *jvirt_barray_ptr;
 
 
 struct jpeg_memory_mgr {
   /* Method pointers */
-  JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
-                                size_t sizeofobject));
-  JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
-                                     size_t sizeofobject));
-  JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
-                                     JDIMENSION samplesperrow,
-                                     JDIMENSION numrows));
-  JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
-                                      JDIMENSION blocksperrow,
-                                      JDIMENSION numrows));
-  JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
-                                                  int pool_id,
-                                                  boolean pre_zero,
-                                                  JDIMENSION samplesperrow,
-                                                  JDIMENSION numrows,
-                                                  JDIMENSION maxaccess));
-  JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
-                                                  int pool_id,
-                                                  boolean pre_zero,
-                                                  JDIMENSION blocksperrow,
-                                                  JDIMENSION numrows,
-                                                  JDIMENSION maxaccess));
-  JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
-  JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
-                                           jvirt_sarray_ptr ptr,
-                                           JDIMENSION start_row,
-                                           JDIMENSION num_rows,
-                                           boolean writable));
-  JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
-                                            jvirt_barray_ptr ptr,
-                                            JDIMENSION start_row,
-                                            JDIMENSION num_rows,
-                                            boolean writable));
-  JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
-  JMETHOD(void, self_destruct, (j_common_ptr cinfo));
+  void *(*alloc_small) (j_common_ptr cinfo, int pool_id, size_t sizeofobject);
+  void *(*alloc_large) (j_common_ptr cinfo, int pool_id,
+                        size_t sizeofobject);
+  JSAMPARRAY (*alloc_sarray) (j_common_ptr cinfo, int pool_id,
+                              JDIMENSION samplesperrow, JDIMENSION numrows);
+  JBLOCKARRAY (*alloc_barray) (j_common_ptr cinfo, int pool_id,
+                               JDIMENSION blocksperrow, JDIMENSION numrows);
+  jvirt_sarray_ptr (*request_virt_sarray) (j_common_ptr cinfo, int pool_id,
+                                           boolean pre_zero,
+                                           JDIMENSION samplesperrow,
+                                           JDIMENSION numrows,
+                                           JDIMENSION maxaccess);
+  jvirt_barray_ptr (*request_virt_barray) (j_common_ptr cinfo, int pool_id,
+                                           boolean pre_zero,
+                                           JDIMENSION blocksperrow,
+                                           JDIMENSION numrows,
+                                           JDIMENSION maxaccess);
+  void (*realize_virt_arrays) (j_common_ptr cinfo);
+  JSAMPARRAY (*access_virt_sarray) (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
+                                    JDIMENSION start_row, JDIMENSION num_rows,
+                                    boolean writable);
+  JBLOCKARRAY (*access_virt_barray) (j_common_ptr cinfo, jvirt_barray_ptr ptr,
+                                     JDIMENSION start_row, JDIMENSION num_rows,
+                                     boolean writable);
+  void (*free_pool) (j_common_ptr cinfo, int pool_id);
+  void (*self_destruct) (j_common_ptr cinfo);
 
   /* Limit on memory allocation for this JPEG object.  (Note that this is
    * merely advisory, not a guaranteed maximum; it only affects the space
    * used for virtual-array buffers.)  May be changed by outer application
    * after creating the JPEG object.
    */
   long max_memory_to_use;
 
   /* Maximum allocation request accepted by alloc_large. */
   long max_alloc_chunk;
 };
 
 
 /* Routine signature for application-supplied marker processing methods.
  * Need not pass marker code since it is stored in cinfo->unread_marker.
  */
-typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
+typedef boolean (*jpeg_marker_parser_method) (j_decompress_ptr cinfo);
 
 
-/* Declarations for routines called by application.
- * The JPP macro hides prototype parameters from compilers that can't cope.
- * Note JPP requires double parentheses.
+/* Originally, this macro was used as a way of defining function prototypes
+ * for both modern compilers as well as older compilers that did not support
+ * prototype parameters.  libjpeg-turbo has never supported these older,
+ * non-ANSI compilers, but the macro is still included because there is some
+ * software out there that uses it.
  */
 
-#ifdef HAVE_PROTOTYPES
-#define JPP(arglist)    arglist
-#else
-#define JPP(arglist)    ()
-#endif
-
-
-/* Short forms of external names for systems with brain-damaged linkers.
- * We shorten external names to be unique in the first six letters, which
- * is good enough for all known systems.
- * (If your compiler itself needs names to be unique in less than 15 
- * characters, you are out of luck.  Get a better compiler.)
- */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_std_error          jStdError
-#define jpeg_CreateCompress     jCreaCompress
-#define jpeg_CreateDecompress   jCreaDecompress
-#define jpeg_destroy_compress   jDestCompress
-#define jpeg_destroy_decompress jDestDecompress
-#define jpeg_stdio_dest         jStdDest
-#define jpeg_stdio_src          jStdSrc
-#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
-#define jpeg_mem_dest           jMemDest
-#define jpeg_mem_src            jMemSrc
-#endif
-#define jpeg_set_defaults       jSetDefaults
-#define jpeg_set_colorspace     jSetColorspace
-#define jpeg_default_colorspace jDefColorspace
-#define jpeg_set_quality        jSetQuality
-#define jpeg_set_linear_quality jSetLQuality
-#if JPEG_LIB_VERSION >= 70
-#define jpeg_default_qtables    jDefQTables
-#endif
-#define jpeg_add_quant_table    jAddQuantTable
-#define jpeg_quality_scaling    jQualityScaling
-#define jpeg_simple_progression jSimProgress
-#define jpeg_suppress_tables    jSuppressTables
-#define jpeg_alloc_quant_table  jAlcQTable
-#define jpeg_alloc_huff_table   jAlcHTable
-#define jpeg_start_compress     jStrtCompress
-#define jpeg_write_scanlines    jWrtScanlines
-#define jpeg_finish_compress    jFinCompress
-#if JPEG_LIB_VERSION >= 70
-#define jpeg_calc_jpeg_dimensions       jCjpegDimensions
-#endif
-#define jpeg_write_raw_data     jWrtRawData
-#define jpeg_write_marker       jWrtMarker
-#define jpeg_write_m_header     jWrtMHeader
-#define jpeg_write_m_byte       jWrtMByte
-#define jpeg_write_tables       jWrtTables
-#define jpeg_read_header        jReadHeader
-#define jpeg_start_decompress   jStrtDecompress
-#define jpeg_read_scanlines     jReadScanlines
-#define jpeg_finish_decompress  jFinDecompress
-#define jpeg_read_raw_data      jReadRawData
-#define jpeg_has_multiple_scans jHasMultScn
-#define jpeg_start_output       jStrtOutput
-#define jpeg_finish_output      jFinOutput
-#define jpeg_input_complete     jInComplete
-#define jpeg_new_colormap       jNewCMap
-#define jpeg_consume_input      jConsumeInput
-#if JPEG_LIB_VERSION >= 80
-#define jpeg_core_output_dimensions     jCoreDimensions
-#endif
-#define jpeg_calc_output_dimensions     jCalcDimensions
-#define jpeg_save_markers       jSaveMarkers
-#define jpeg_set_marker_processor       jSetMarker
-#define jpeg_read_coefficients  jReadCoefs
-#define jpeg_write_coefficients jWrtCoefs
-#define jpeg_copy_critical_parameters   jCopyCrit
-#define jpeg_abort_compress     jAbrtCompress
-#define jpeg_abort_decompress   jAbrtDecompress
-#define jpeg_abort              jAbort
-#define jpeg_destroy            jDestroy
-#define jpeg_resync_to_restart  jResyncRestart
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
+#define JPP(arglist)    arglist
 
 
 /* Default error-management setup */
-EXTERN(struct jpeg_error_mgr *) jpeg_std_error
-        JPP((struct jpeg_error_mgr * err));
+EXTERN(struct jpeg_error_mgr *) jpeg_std_error (struct jpeg_error_mgr *err);
 
 /* Initialization of JPEG compression objects.
  * jpeg_create_compress() and jpeg_create_decompress() are the exported
  * names that applications should call.  These expand to calls on
  * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
  * passed for version mismatch checking.
  * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
  */
 #define jpeg_create_compress(cinfo) \
     jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
-                        (size_t) sizeof(struct jpeg_compress_struct))
+                        (size_t) sizeof(struct jpeg_compress_struct))
 #define jpeg_create_decompress(cinfo) \
     jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
-                          (size_t) sizeof(struct jpeg_decompress_struct))
-EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
-                                      int version, size_t structsize));
-EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
-                                        int version, size_t structsize));
+                          (size_t) sizeof(struct jpeg_decompress_struct))
+EXTERN(void) jpeg_CreateCompress (j_compress_ptr cinfo, int version,
+                                  size_t structsize);
+EXTERN(void) jpeg_CreateDecompress (j_decompress_ptr cinfo, int version,
+                                    size_t structsize);
 /* Destruction of JPEG compression objects */
-EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_destroy_compress (j_compress_ptr cinfo);
+EXTERN(void) jpeg_destroy_decompress (j_decompress_ptr cinfo);
 
 /* Standard data source and destination managers: stdio streams. */
 /* Caller is responsible for opening the file before and closing after. */
-EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
-EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
+EXTERN(void) jpeg_stdio_dest (j_compress_ptr cinfo, FILE *outfile);
+EXTERN(void) jpeg_stdio_src (j_decompress_ptr cinfo, FILE *infile);
 
 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 /* Data source and destination managers: memory buffers. */
-EXTERN(void) jpeg_mem_dest JPP((j_compress_ptr cinfo,
-                               unsigned char ** outbuffer,
-                               unsigned long * outsize));
-EXTERN(void) jpeg_mem_src JPP((j_decompress_ptr cinfo,
-                              unsigned char * inbuffer,
-                              unsigned long insize));
+EXTERN(void) jpeg_mem_dest (j_compress_ptr cinfo, unsigned char **outbuffer,
+                            unsigned long *outsize);
+EXTERN(void) jpeg_mem_src (j_decompress_ptr cinfo,
+                           const unsigned char *inbuffer,
+                           unsigned long insize);
 #endif
 
 /* Default parameter setup for compression */
-EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_set_defaults (j_compress_ptr cinfo);
 /* Compression parameter setup aids */
-EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
-                                      J_COLOR_SPACE colorspace));
-EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
-                                   boolean force_baseline));
-EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
-                                          int scale_factor,
-                                          boolean force_baseline));
+EXTERN(void) jpeg_set_colorspace (j_compress_ptr cinfo,
+                                  J_COLOR_SPACE colorspace);
+EXTERN(void) jpeg_default_colorspace (j_compress_ptr cinfo);
+EXTERN(void) jpeg_set_quality (j_compress_ptr cinfo, int quality,
+                               boolean force_baseline);
+EXTERN(void) jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
+                                      boolean force_baseline);
 #if JPEG_LIB_VERSION >= 70
-EXTERN(void) jpeg_default_qtables JPP((j_compress_ptr cinfo,
-                                       boolean force_baseline));
+EXTERN(void) jpeg_default_qtables (j_compress_ptr cinfo,
+                                   boolean force_baseline);
 #endif
-EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
-                                       const unsigned int *basic_table,
-                                       int scale_factor,
-                                       boolean force_baseline));
-EXTERN(int) jpeg_quality_scaling JPP((int quality));
-EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
-                                       boolean suppress));
-EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
-EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
+                                   const unsigned int *basic_table,
+                                   int scale_factor, boolean force_baseline);
+EXTERN(int) jpeg_quality_scaling (int quality);
+EXTERN(void) jpeg_simple_progression (j_compress_ptr cinfo);
+EXTERN(void) jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress);
+EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table (j_common_ptr cinfo);
+EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table (j_common_ptr cinfo);
 
 /* Main entry points for compression */
-EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
-                                      boolean write_all_tables));
-EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
-                                             JSAMPARRAY scanlines,
-                                             JDIMENSION num_lines));
-EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_start_compress (j_compress_ptr cinfo,
+                                  boolean write_all_tables);
+EXTERN(JDIMENSION) jpeg_write_scanlines (j_compress_ptr cinfo,
+                                         JSAMPARRAY scanlines,
+                                         JDIMENSION num_lines);
+EXTERN(void) jpeg_finish_compress (j_compress_ptr cinfo);
 
 #if JPEG_LIB_VERSION >= 70
 /* Precalculate JPEG dimensions for current compression parameters. */
-EXTERN(void) jpeg_calc_jpeg_dimensions JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_calc_jpeg_dimensions (j_compress_ptr cinfo);
 #endif
 
 /* Replaces jpeg_write_scanlines when writing raw downsampled data. */
-EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
-                                            JSAMPIMAGE data,
-                                            JDIMENSION num_lines));
+EXTERN(JDIMENSION) jpeg_write_raw_data (j_compress_ptr cinfo, JSAMPIMAGE data,
+                                        JDIMENSION num_lines);
 
 /* Write a special marker.  See libjpeg.txt concerning safe usage. */
-EXTERN(void) jpeg_write_marker
-        JPP((j_compress_ptr cinfo, int marker,
-             const JOCTET * dataptr, unsigned int datalen));
+EXTERN(void) jpeg_write_marker (j_compress_ptr cinfo, int marker,
+                                const JOCTET *dataptr, unsigned int datalen);
 /* Same, but piecemeal. */
-EXTERN(void) jpeg_write_m_header
-        JPP((j_compress_ptr cinfo, int marker, unsigned int datalen));
-EXTERN(void) jpeg_write_m_byte
-        JPP((j_compress_ptr cinfo, int val));
+EXTERN(void) jpeg_write_m_header (j_compress_ptr cinfo, int marker,
+                                  unsigned int datalen);
+EXTERN(void) jpeg_write_m_byte (j_compress_ptr cinfo, int val);
 
 /* Alternate compression function: just write an abbreviated table file */
-EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_write_tables (j_compress_ptr cinfo);
 
 /* Decompression startup: read start of JPEG datastream to see what's there */
-EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
-                                  boolean require_image));
+EXTERN(int) jpeg_read_header (j_decompress_ptr cinfo, boolean require_image);
 /* Return value is one of: */
-#define JPEG_SUSPENDED          0 /* Suspended due to lack of input data */
-#define JPEG_HEADER_OK          1 /* Found valid image datastream */
-#define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */
+#define JPEG_SUSPENDED          0 /* Suspended due to lack of input data */
+#define JPEG_HEADER_OK          1 /* Found valid image datastream */
+#define JPEG_HEADER_TABLES_ONLY 2 /* Found valid table-specs-only datastream */
 /* If you pass require_image = TRUE (normal case), you need not check for
  * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
  * JPEG_SUSPENDED is only possible if you use a data source module that can
  * give a suspension return (the stdio source module doesn't).
  */
 
 /* Main entry points for decompression */
-EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
-EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
-                                            JSAMPARRAY scanlines,
-                                            JDIMENSION max_lines));
+EXTERN(boolean) jpeg_start_decompress (j_decompress_ptr cinfo);
+EXTERN(JDIMENSION) jpeg_read_scanlines (j_decompress_ptr cinfo,
+                                        JSAMPARRAY scanlines,
+                                        JDIMENSION max_lines);
 EXTERN(JDIMENSION) jpeg_skip_scanlines (j_decompress_ptr cinfo,
                                         JDIMENSION num_lines);
-EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_crop_scanline (j_decompress_ptr cinfo, JDIMENSION *xoffset,
+                                 JDIMENSION *width);
+EXTERN(boolean) jpeg_finish_decompress (j_decompress_ptr cinfo);
 
 /* Replaces jpeg_read_scanlines when reading raw downsampled data. */
-EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
-                                           JSAMPIMAGE data,
-                                           JDIMENSION max_lines));
+EXTERN(JDIMENSION) jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
+                                       JDIMENSION max_lines);
 
 /* Additional entry points for buffered-image mode. */
-EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
-EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
-                                       int scan_number));
-EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
-EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
-EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
-EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_has_multiple_scans (j_decompress_ptr cinfo);
+EXTERN(boolean) jpeg_start_output (j_decompress_ptr cinfo, int scan_number);
+EXTERN(boolean) jpeg_finish_output (j_decompress_ptr cinfo);
+EXTERN(boolean) jpeg_input_complete (j_decompress_ptr cinfo);
+EXTERN(void) jpeg_new_colormap (j_decompress_ptr cinfo);
+EXTERN(int) jpeg_consume_input (j_decompress_ptr cinfo);
 /* Return value is one of: */
-/* #define JPEG_SUSPENDED       0    Suspended due to lack of input data */
-#define JPEG_REACHED_SOS        1 /* Reached start of new scan */
-#define JPEG_REACHED_EOI        2 /* Reached end of image */
-#define JPEG_ROW_COMPLETED      3 /* Completed one iMCU row */
-#define JPEG_SCAN_COMPLETED     4 /* Completed last iMCU row of a scan */
+/* #define JPEG_SUSPENDED       0    Suspended due to lack of input data */
+#define JPEG_REACHED_SOS        1 /* Reached start of new scan */
+#define JPEG_REACHED_EOI        2 /* Reached end of image */
+#define JPEG_ROW_COMPLETED      3 /* Completed one iMCU row */
+#define JPEG_SCAN_COMPLETED     4 /* Completed last iMCU row of a scan */
 
 /* Precalculate output dimensions for current decompression parameters. */
 #if JPEG_LIB_VERSION >= 80
-EXTERN(void) jpeg_core_output_dimensions JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_core_output_dimensions (j_decompress_ptr cinfo);
 #endif
-EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_calc_output_dimensions (j_decompress_ptr cinfo);
 
 /* Control saving of COM and APPn markers into marker_list. */
-EXTERN(void) jpeg_save_markers
-        JPP((j_decompress_ptr cinfo, int marker_code,
-             unsigned int length_limit));
+EXTERN(void) jpeg_save_markers (j_decompress_ptr cinfo, int marker_code,
+                                unsigned int length_limit);
 
 /* Install a special processing method for COM or APPn markers. */
-EXTERN(void) jpeg_set_marker_processor
-        JPP((j_decompress_ptr cinfo, int marker_code,
-             jpeg_marker_parser_method routine));
+EXTERN(void) jpeg_set_marker_processor (j_decompress_ptr cinfo,
+                                        int marker_code,
+                                        jpeg_marker_parser_method routine);
 
 /* Read or write raw DCT coefficients --- useful for lossless transcoding. */
-EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
-EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
-                                          jvirt_barray_ptr * coef_arrays));
-EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
-                                                j_compress_ptr dstinfo));
+EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients (j_decompress_ptr cinfo);
+EXTERN(void) jpeg_write_coefficients (j_compress_ptr cinfo,
+                                      jvirt_barray_ptr *coef_arrays);
+EXTERN(void) jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
+                                            j_compress_ptr dstinfo);
 
 /* If you choose to abort compression or decompression before completing
  * jpeg_finish_(de)compress, then you need to clean up to release memory,
  * temporary files, etc.  You can just call jpeg_destroy_(de)compress
  * if you're done with the JPEG object, but if you want to clean it up and
  * reuse it, call this:
  */
-EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_abort_compress (j_compress_ptr cinfo);
+EXTERN(void) jpeg_abort_decompress (j_decompress_ptr cinfo);
 
 /* Generic versions of jpeg_abort and jpeg_destroy that work on either
  * flavor of JPEG object.  These may be more convenient in some places.
  */
-EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
-EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_abort (j_common_ptr cinfo);
+EXTERN(void) jpeg_destroy (j_common_ptr cinfo);
 
 /* Default restart-marker-resync procedure for use by data source modules */
-EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
-                                            int desired));
+EXTERN(boolean) jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired);
 
 
 /* These marker codes are exported since applications and data source modules
  * are likely to want to use them.
  */
 
-#define JPEG_RST0       0xD0    /* RST0 marker code */
-#define JPEG_EOI        0xD9    /* EOI marker code */
-#define JPEG_APP0       0xE0    /* APP0 marker code */
-#define JPEG_COM        0xFE    /* COM marker code */
+#define JPEG_RST0       0xD0    /* RST0 marker code */
+#define JPEG_EOI        0xD9    /* EOI marker code */
+#define JPEG_APP0       0xE0    /* APP0 marker code */
+#define JPEG_COM        0xFE    /* COM marker code */
 
 
 /* If we have a brain-damaged compiler that emits warnings (or worse, errors)
  * for structure definitions that are never filled in, keep it quiet by
  * supplying dummy definitions for the various substructures.
  */
 
 #ifdef INCOMPLETE_TYPES_BROKEN
-#ifndef JPEG_INTERNALS          /* will be defined in jpegint.h */
+#ifndef JPEG_INTERNALS          /* will be defined in jpegint.h */
 struct jvirt_sarray_control { long dummy; };
 struct jvirt_barray_control { long dummy; };
 struct jpeg_comp_master { long dummy; };
 struct jpeg_c_main_controller { long dummy; };
 struct jpeg_c_prep_controller { long dummy; };
 struct jpeg_c_coef_controller { long dummy; };
 struct jpeg_marker_writer { long dummy; };
 struct jpeg_color_converter { long dummy; };
 struct jpeg_downsampler { long dummy; };
 struct jpeg_forward_dct { long dummy; };
@@ skipping 14 matching lines @@
 
 
 /*
  * The JPEG library modules define JPEG_INTERNALS before including this file.
  * The internal structure declarations are read only when that is true.
  * Applications using the library should not include jpegint.h, but may wish
  * to include jerror.h.
  */
 
 #ifdef JPEG_INTERNALS
-#include "jpegint.h"            /* fetch private declarations */
-#include "jerror.h"             /* fetch error codes too */
+#include "jpegint.h"            /* fetch private declarations */
+#include "jerror.h"             /* fetch error codes too */
 #endif
 
 #ifdef __cplusplus
 #ifndef DONT_USE_EXTERN_C
 }
 #endif
 #endif
 
 #endif /* JPEGLIB_H */