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

jdatasrc.c

 /*
  * jdatasrc.c
  *
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * Modified 2009-2011 by Guido Vollbeding.
  * libjpeg-turbo Modifications:
  * Copyright (C) 2013, D. R. Commander.
- * 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 contains decompression data source routines for the case of
  * reading JPEG data from memory or from a file (or any stdio stream).
  * While these routines are sufficient for most applications,
  * some will want to use a different source manager.
  * IMPORTANT: we assume that fread() will correctly transcribe an array of
  * JOCTETs from 8-bit-wide elements on external storage.  If char is wider
  * than 8 bits on your machine, you may need to do some tweaking.
  */
 
 /* this is not a core library module, so it doesn't define JPEG_INTERNALS */
 #include "jinclude.h"
 #include "jpeglib.h"
 #include "jerror.h"
 
 
 /* Expanded data source object for stdio input */
 
 typedef struct {
-  struct jpeg_source_mgr pub;   /* public fields */
+  struct jpeg_source_mgr pub;   /* public fields */
 
-  FILE * infile;                /* source stream */
-  JOCTET * buffer;              /* start of buffer */
-  boolean start_of_file;        /* have we gotten any data yet? */
+  FILE *infile;                 /* source stream */
+  JOCTET *buffer;               /* start of buffer */
+  boolean start_of_file;        /* have we gotten any data yet? */
 } my_source_mgr;
 
-typedef my_source_mgr * my_src_ptr;
+typedef my_source_mgr *my_src_ptr;
 
-#define INPUT_BUF_SIZE  4096    /* choose an efficiently fread'able size */
+#define INPUT_BUF_SIZE  4096    /* choose an efficiently fread'able size */
 
 
 /*
  * Initialize source --- called by jpeg_read_header
  * before any data is actually read.
  */
 
 METHODDEF(void)
 init_source (j_decompress_ptr cinfo)
 {
@@ skipping 50 matching lines @@
 
 METHODDEF(boolean)
 fill_input_buffer (j_decompress_ptr cinfo)
 {
   my_src_ptr src = (my_src_ptr) cinfo->src;
   size_t nbytes;
 
   nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
 
   if (nbytes <= 0) {
-    if (src->start_of_file)     /* Treat empty input file as fatal error */
+    if (src->start_of_file)     /* Treat empty input file as fatal error */
       ERREXIT(cinfo, JERR_INPUT_EMPTY);
     WARNMS(cinfo, JWRN_JPEG_EOF);
     /* Insert a fake EOI marker */
     src->buffer[0] = (JOCTET) 0xFF;
     src->buffer[1] = (JOCTET) JPEG_EOI;
     nbytes = 2;
   }
 
   src->pub.next_input_byte = src->buffer;
   src->pub.bytes_in_buffer = nbytes;
@@ skipping 34 matching lines @@
  * is not granted the right to give a suspension return.  If the skip extends
  * beyond the data currently in the buffer, the buffer can be marked empty so
  * that the next read will cause a fill_input_buffer call that can suspend.
  * Arranging for additional bytes to be discarded before reloading the input
  * buffer is the application writer's problem.
  */
 
 METHODDEF(void)
 skip_input_data (j_decompress_ptr cinfo, long num_bytes)
 {
-  struct jpeg_source_mgr * src = cinfo->src;
+  struct jpeg_source_mgr *src = cinfo->src;
 
   /* Just a dumb implementation for now.  Could use fseek() except
    * it doesn't work on pipes.  Not clear that being smart is worth
    * any trouble anyway --- large skips are infrequent.
    */
   if (num_bytes > 0) {
     while (num_bytes > (long) src->bytes_in_buffer) {
       num_bytes -= (long) src->bytes_in_buffer;
       (void) (*src->fill_input_buffer) (cinfo);
       /* note we assume that fill_input_buffer will never return FALSE,
@@ skipping 31 matching lines @@
 }
 
 
 /*
  * Prepare for input from a stdio stream.
  * The caller must have already opened the stream, and is responsible
  * for closing it after finishing decompression.
  */
 
 GLOBAL(void)
-jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
+jpeg_stdio_src (j_decompress_ptr cinfo, FILE *infile)
 {
   my_src_ptr src;
 
   /* The source object and input buffer are made permanent so that a series
    * of JPEG images can be read from the same file by calling jpeg_stdio_src
    * only before the first one.  (If we discarded the buffer at the end of
    * one image, we'd likely lose the start of the next one.)
    * This makes it unsafe to use this manager and a different source
    * manager serially with the same JPEG object.  Caveat programmer.
    */
-  if (cinfo->src == NULL) {     /* first time for this JPEG object? */
+  if (cinfo->src == NULL) {     /* first time for this JPEG object? */
     cinfo->src = (struct jpeg_source_mgr *)
       (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-                                  SIZEOF(my_source_mgr));
+                                  sizeof(my_source_mgr));
     src = (my_src_ptr) cinfo->src;
     src->buffer = (JOCTET *)
       (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-                                  INPUT_BUF_SIZE * SIZEOF(JOCTET));
+                                  INPUT_BUF_SIZE * sizeof(JOCTET));
   }
 
   src = (my_src_ptr) cinfo->src;
   src->pub.init_source = init_source;
   src->pub.fill_input_buffer = fill_input_buffer;
   src->pub.skip_input_data = skip_input_data;
   src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
   src->pub.term_source = term_source;
   src->infile = infile;
   src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
   src->pub.next_input_byte = NULL; /* until buffer loaded */
 }
 
 
 #if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
 /*
  * Prepare for input from a supplied memory buffer.
  * The buffer must contain the whole JPEG data.
  */
 
 GLOBAL(void)
 jpeg_mem_src (j_decompress_ptr cinfo,
-              unsigned char * inbuffer, unsigned long insize)
+              const unsigned char *inbuffer, unsigned long insize)
 {
-  struct jpeg_source_mgr * src;
+  struct jpeg_source_mgr *src;
 
-  if (inbuffer == NULL || insize == 0)  /* Treat empty input as fatal error */
+  if (inbuffer == NULL || insize == 0)  /* Treat empty input as fatal error */
     ERREXIT(cinfo, JERR_INPUT_EMPTY);
 
   /* The source object is made permanent so that a series of JPEG images
    * can be read from the same buffer by calling jpeg_mem_src only before
    * the first one.
    */
-  if (cinfo->src == NULL) {     /* first time for this JPEG object? */
+  if (cinfo->src == NULL) {     /* first time for this JPEG object? */
     cinfo->src = (struct jpeg_source_mgr *)
       (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-                                  SIZEOF(struct jpeg_source_mgr));
+                                  sizeof(struct jpeg_source_mgr));
   }
 
   src = cinfo->src;
   src->init_source = init_mem_source;
   src->fill_input_buffer = fill_mem_input_buffer;
   src->skip_input_data = skip_input_data;
   src->resync_to_restart = jpeg_resync_to_restart; /* use default method */
   src->term_source = term_source;
   src->bytes_in_buffer = (size_t) insize;
-  src->next_input_byte = (JOCTET *) inbuffer;
+  src->next_input_byte = (const JOCTET *) inbuffer;
 }
 #endif