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

example.c

 /*
  * example.c
  *
  * This file illustrates how to use the IJG code as a subroutine library
  * to read or write JPEG image files.  You should look at this code in
  * conjunction with the documentation file libjpeg.txt.
  *
  * This code will not do anything useful as-is, but it may be helpful as a
- * skeleton for constructing routines that call the JPEG library.  
+ * skeleton for constructing routines that call the JPEG library.
  *
  * We present these routines in the same coding style used in the JPEG code
  * (ANSI function definitions, etc); but you are of course free to code your
  * routines in a different style if you prefer.
  */
 
 #include <stdio.h>
 
 /*
  * Include file for users of JPEG library.
@@ skipping 31 matching lines @@
  * If you are working with color data, then the color values for each pixel
  * must be adjacent in the row; for example, R,G,B,R,G,B,R,G,B,... for 24-bit
  * RGB color.
  *
  * For this example, we'll assume that this data structure matches the way
  * our application has stored the image in memory, so we can just pass a
  * pointer to our image buffer.  In particular, let's say that the image is
  * RGB color and is described by:
  */
 
-extern JSAMPLE * image_buffer;  /* Points to large array of R,G,B-order data */
-extern int image_height;        /* Number of rows in image */
-extern int image_width;         /* Number of columns in image */
+extern JSAMPLE *image_buffer;   /* Points to large array of R,G,B-order data */
+extern int image_height;        /* Number of rows in image */
+extern int image_width;         /* Number of columns in image */
 
 
 /*
  * Sample routine for JPEG compression.  We assume that the target file name
  * and a compression quality factor are passed in.
  */
 
 GLOBAL(void)
-write_JPEG_file (char * filename, int quality)
+write_JPEG_file (char *filename, int quality)
 {
   /* This struct contains the JPEG compression parameters and pointers to
    * working space (which is allocated as needed by the JPEG library).
    * It is possible to have several such structures, representing multiple
    * compression/decompression processes, in existence at once.  We refer
    * to any one struct (and its associated working data) as a "JPEG object".
    */
   struct jpeg_compress_struct cinfo;
   /* This struct represents a JPEG error handler.  It is declared separately
    * because applications often want to supply a specialized error handler
    * (see the second half of this file for an example).  But here we just
    * take the easy way out and use the standard error handler, which will
    * print a message on stderr and call exit() if compression fails.
    * Note that this struct must live as long as the main JPEG parameter
    * struct, to avoid dangling-pointer problems.
    */
   struct jpeg_error_mgr jerr;
   /* More stuff */
-  FILE * outfile;               /* target file */
-  JSAMPROW row_pointer[1];      /* pointer to JSAMPLE row[s] */
-  int row_stride;               /* physical row width in image buffer */
+  FILE *outfile;                /* target file */
+  JSAMPROW row_pointer[1];      /* pointer to JSAMPLE row[s] */
+  int row_stride;               /* physical row width in image buffer */
 
   /* Step 1: allocate and initialize JPEG compression object */
 
   /* We have to set up the error handler first, in case the initialization
    * step fails.  (Unlikely, but it could happen if you are out of memory.)
    * This routine fills in the contents of struct jerr, and returns jerr's
    * address which we place into the link field in cinfo.
    */
   cinfo.err = jpeg_std_error(&jerr);
   /* Now we can initialize the JPEG compression object. */
@@ skipping 11 matching lines @@
     fprintf(stderr, "can't open %s\n", filename);
     exit(1);
   }
   jpeg_stdio_dest(&cinfo, outfile);
 
   /* Step 3: set parameters for compression */
 
   /* First we supply a description of the input image.
    * Four fields of the cinfo struct must be filled in:
    */
-  cinfo.image_width = image_width;      /* image width and height, in pixels */
+  cinfo.image_width = image_width;      /* image width and height, in pixels */
   cinfo.image_height = image_height;
-  cinfo.input_components = 3;           /* # of color components per pixel */
-  cinfo.in_color_space = JCS_RGB;       /* colorspace of input image */
+  cinfo.input_components = 3;           /* # of color components per pixel */
+  cinfo.in_color_space = JCS_RGB;       /* colorspace of input image */
   /* Now use the library's routine to set default compression parameters.
    * (You must set at least cinfo.in_color_space before calling this,
    * since the defaults depend on the source color space.)
    */
   jpeg_set_defaults(&cinfo);
   /* Now you can set any non-default parameters you wish to.
    * Here we just illustrate the use of quality (quantization table) scaling:
    */
   jpeg_set_quality(&cinfo, quality, TRUE /* limit to baseline-JPEG values */);
 
   /* Step 4: Start compressor */
 
   /* TRUE ensures that we will write a complete interchange-JPEG file.
    * Pass TRUE unless you are very sure of what you're doing.
    */
   jpeg_start_compress(&cinfo, TRUE);
 
   /* Step 5: while (scan lines remain to be written) */
   /*           jpeg_write_scanlines(...); */
 
   /* Here we use the library's state variable cinfo.next_scanline as the
    * loop counter, so that we don't have to keep track ourselves.
    * To keep things simple, we pass one scanline per call; you can pass
    * more if you wish, though.
    */
-  row_stride = image_width * 3; /* JSAMPLEs per row in image_buffer */
+  row_stride = image_width * 3; /* JSAMPLEs per row in image_buffer */
 
   while (cinfo.next_scanline < cinfo.image_height) {
     /* jpeg_write_scanlines expects an array of pointers to scanlines.
      * Here the array is only one element long, but you could pass
      * more than one scanline at a time if that's more convenient.
      */
     row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
     (void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
   }
 
@@ skipping 76 matching lines @@
  * establish the return point.  We want the replacement error_exit to do a
  * longjmp().  But we need to make the setjmp buffer accessible to the
  * error_exit routine.  To do this, we make a private extension of the
  * standard JPEG error handler object.  (If we were using C++, we'd say we
  * were making a subclass of the regular error handler.)
  *
  * Here's the extended error handler struct:
  */
 
 struct my_error_mgr {
-  struct jpeg_error_mgr pub;    /* "public" fields */
+  struct jpeg_error_mgr pub;    /* "public" fields */
 
-  jmp_buf setjmp_buffer;        /* for return to caller */
+  jmp_buf setjmp_buffer;        /* for return to caller */
 };
 
-typedef struct my_error_mgr * my_error_ptr;
+typedef struct my_error_mgr *my_error_ptr;
 
 /*
  * Here's the routine that will replace the standard error_exit method:
  */
 
 METHODDEF(void)
 my_error_exit (j_common_ptr cinfo)
 {
   /* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
   my_error_ptr myerr = (my_error_ptr) cinfo->err;
 
   /* Always display the message. */
   /* We could postpone this until after returning, if we chose. */
   (*cinfo->err->output_message) (cinfo);
 
   /* Return control to the setjmp point */
   longjmp(myerr->setjmp_buffer, 1);
 }
 
 
 /*
  * Sample routine for JPEG decompression.  We assume that the source file name
  * is passed in.  We want to return 1 on success, 0 on error.
  */
 
 
 GLOBAL(int)
-read_JPEG_file (char * filename)
+read_JPEG_file (char *filename)
 {
   /* This struct contains the JPEG decompression parameters and pointers to
    * working space (which is allocated as needed by the JPEG library).
    */
   struct jpeg_decompress_struct cinfo;
   /* We use our private extension JPEG error handler.
    * Note that this struct must live as long as the main JPEG parameter
    * struct, to avoid dangling-pointer problems.
    */
   struct my_error_mgr jerr;
   /* More stuff */
-  FILE * infile;                /* source file */
-  JSAMPARRAY buffer;            /* Output row buffer */
-  int row_stride;               /* physical row width in output buffer */
+  FILE *infile;                 /* source file */
+  JSAMPARRAY buffer;            /* Output row buffer */
+  int row_stride;               /* physical row width in output buffer */
 
   /* In this example we want to open the input file before doing anything else,
    * so that the setjmp() error recovery below can assume the file is open.
    * VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
    * requires it in order to read binary files.
    */
 
   if ((infile = fopen(filename, "rb")) == NULL) {
     fprintf(stderr, "can't open %s\n", filename);
     return 0;
@@ skipping 40 matching lines @@
   (void) jpeg_start_decompress(&cinfo);
   /* We can ignore the return value since suspension is not possible
    * with the stdio data source.
    */
 
   /* We may need to do some setup of our own at this point before reading
    * the data.  After jpeg_start_decompress() we have the correct scaled
    * output image dimensions available, as well as the output colormap
    * if we asked for color quantization.
    * In this example, we need to make an output work buffer of the right size.
-   */ 
+   */
   /* JSAMPLEs per row in output buffer */
   row_stride = cinfo.output_width * cinfo.output_components;
   /* Make a one-row-high sample array that will go away when done with image */
   buffer = (*cinfo.mem->alloc_sarray)
-                ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
+                ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
 
   /* Step 6: while (scan lines remain to be read) */
   /*           jpeg_read_scanlines(...); */
 
   /* Here we use the library's state variable cinfo.output_scanline as the
    * loop counter, so that we don't have to keep track ourselves.
    */
   while (cinfo.output_scanline < cinfo.output_height) {
     /* jpeg_read_scanlines expects an array of pointers to scanlines.
      * Here the array is only one element long, but you could ask for
@@ skipping 49 matching lines @@
  *
  * Scanlines are returned in the same order as they appear in the JPEG file,
  * which is standardly top-to-bottom.  If you must emit data bottom-to-top,
  * you can use one of the virtual arrays provided by the JPEG memory manager
  * to invert the data.  See wrbmp.c for an example.
  *
  * As with compression, some operating modes may require temporary files.
  * On some systems you may need to set up a signal handler to ensure that
  * temporary files are deleted if the program is interrupted.  See libjpeg.txt.
  */