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

jpegtran.c

 /*
  * jpegtran.c
  *
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1995-2010, Thomas G. Lane, Guido Vollbeding.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010, D. R. Commander.
- * For conditions of distribution and use, see the accompanying README file.
+ * Copyright (C) 2010, 2014, D. R. Commander.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
  *
  * This file contains a command-line user interface for JPEG transcoding.
  * It is very similar to cjpeg.c, and partly to djpeg.c, but provides
  * lossless transcoding between different JPEG file formats.  It also
  * provides some lossless and sort-of-lossless transformations of JPEG data.
  */
 
-#include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
-#include "transupp.h"           /* Support routines for jpegtran */
-#include "jversion.h"           /* for version message */
-#include "config.h"
+#include "cdjpeg.h"             /* Common decls for cjpeg/djpeg applications */
+#include "transupp.h"           /* Support routines for jpegtran */
+#include "jversion.h"           /* for version message */
+#include "jconfigint.h"
 
-#ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
+#ifdef USE_CCOMMAND             /* command-line reader for Macintosh */
 #ifdef __MWERKS__
 #include <SIOUX.h>              /* Metrowerks needs this */
-#include <console.h>            /* ... and this */
+#include <console.h>            /* ... and this */
 #endif
 #ifdef THINK_C
-#include <console.h>            /* Think declares it here */
+#include <console.h>            /* Think declares it here */
 #endif
 #endif
 
 
 /*
  * Argument-parsing code.
  * The switch parser is designed to be useful with DOS-style command line
  * syntax, ie, intermixed switches and file names, where only the switches
  * to the left of a given file name affect processing of that file.
  * The main program in this file doesn't actually use this capability...
  */
 
 
-static const char * progname;   /* program name for error messages */
-static char * outfilename;      /* for -outfile switch */
-static JCOPY_OPTION copyoption; /* -copy switch */
+static const char *progname;    /* program name for error messages */
+static char *outfilename;       /* for -outfile switch */
+static JCOPY_OPTION copyoption; /* -copy switch */
 static jpeg_transform_info transformoption; /* image transformation options */
 
 
 LOCAL(void)
 usage (void)
 /* complain about bad command line */
 {
   fprintf(stderr, "usage: %s [switches] ", progname);
 #ifdef TWO_FILE_COMMANDLINE
   fprintf(stderr, "inputfile outputfile\n");
@@ skipping 25 matching lines @@
   fprintf(stderr, "  -trim          Drop non-transformable edge blocks\n");
 #endif
   fprintf(stderr, "Switches for advanced users:\n");
 #ifdef C_ARITH_CODING_SUPPORTED
   fprintf(stderr, "  -arithmetic    Use arithmetic coding\n");
 #endif
   fprintf(stderr, "  -restart N     Set restart interval in rows, or in blocks with B\n");
   fprintf(stderr, "  -maxmemory N   Maximum memory to use (in kbytes)\n");
   fprintf(stderr, "  -outfile name  Specify name for output file\n");
   fprintf(stderr, "  -verbose  or  -debug   Emit debug output\n");
+  fprintf(stderr, "  -version       Print version information and exit\n");
   fprintf(stderr, "Switches for wizards:\n");
 #ifdef C_MULTISCAN_FILES_SUPPORTED
   fprintf(stderr, "  -scans file    Create multi-scan JPEG per script file\n");
 #endif
   exit(EXIT_FAILURE);
 }
 
 
 LOCAL(void)
 select_transform (JXFORM_CODE transform)
 /* Silly little routine to detect multiple transform options,
  * which we can't handle.
  */
 {
 #if TRANSFORMS_SUPPORTED
   if (transformoption.transform == JXFORM_NONE ||
       transformoption.transform == transform) {
     transformoption.transform = transform;
   } else {
     fprintf(stderr, "%s: can only do one image transformation at a time\n",
-            progname);
+            progname);
     usage();
   }
 #else
   fprintf(stderr, "%s: sorry, image transformation was not compiled\n",
-          progname);
+          progname);
   exit(EXIT_FAILURE);
 #endif
 }
 
 
 LOCAL(int)
 parse_switches (j_compress_ptr cinfo, int argc, char **argv,
-                int last_file_arg_seen, boolean for_real)
+                int last_file_arg_seen, boolean for_real)
 /* Parse optional switches.
  * Returns argv[] index of first file-name argument (== argc if none).
  * Any file names with indexes <= last_file_arg_seen are ignored;
  * they have presumably been processed in a previous iteration.
  * (Pass 0 for last_file_arg_seen on the first or only iteration.)
  * for_real is FALSE on the first (dummy) pass; we may skip any expensive
  * processing.
  */
 {
   int argn;
-  char * arg;
+  char *arg;
   boolean simple_progressive;
-  char * scansarg = NULL;       /* saves -scans parm if any */
+  char *scansarg = NULL;        /* saves -scans parm if any */
 
   /* Set up default JPEG parameters. */
   simple_progressive = FALSE;
   outfilename = NULL;
   copyoption = JCOPYOPT_DEFAULT;
   transformoption.transform = JXFORM_NONE;
   transformoption.perfect = FALSE;
   transformoption.trim = FALSE;
   transformoption.force_grayscale = FALSE;
   transformoption.crop = FALSE;
   transformoption.slow_hflip = FALSE;
   cinfo->err->trace_level = 0;
 
   /* Scan command line options, adjust parameters */
 
   for (argn = 1; argn < argc; argn++) {
     arg = argv[argn];
     if (*arg != '-') {
       /* Not a switch, must be a file name argument */
       if (argn <= last_file_arg_seen) {
-        outfilename = NULL;     /* -outfile applies to just one input file */
-        continue;               /* ignore this name if previously processed */
+        outfilename = NULL;     /* -outfile applies to just one input file */
+        continue;               /* ignore this name if previously processed */
       }
-      break;                    /* else done parsing switches */
+      break;                    /* else done parsing switches */
     }
-    arg++;                      /* advance past switch marker character */
+    arg++;                      /* advance past switch marker character */
 
     if (keymatch(arg, "arithmetic", 1)) {
       /* Use arithmetic coding. */
 #ifdef C_ARITH_CODING_SUPPORTED
       cinfo->arith_code = TRUE;
 #else
       fprintf(stderr, "%s: sorry, arithmetic coding not supported\n",
-              progname);
+              progname);
       exit(EXIT_FAILURE);
 #endif
 
     } else if (keymatch(arg, "copy", 2)) {
       /* Select which extra markers to copy. */
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (keymatch(argv[argn], "none", 1)) {
-        copyoption = JCOPYOPT_NONE;
+        copyoption = JCOPYOPT_NONE;
       } else if (keymatch(argv[argn], "comments", 1)) {
-        copyoption = JCOPYOPT_COMMENTS;
+        copyoption = JCOPYOPT_COMMENTS;
       } else if (keymatch(argv[argn], "all", 1)) {
-        copyoption = JCOPYOPT_ALL;
+        copyoption = JCOPYOPT_ALL;
       } else
-        usage();
+        usage();
 
     } else if (keymatch(arg, "crop", 2)) {
       /* Perform lossless cropping. */
 #if TRANSFORMS_SUPPORTED
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (! jtransform_parse_crop_spec(&transformoption, argv[argn])) {
-        fprintf(stderr, "%s: bogus -crop argument '%s'\n",
-                progname, argv[argn]);
-        exit(EXIT_FAILURE);
+        fprintf(stderr, "%s: bogus -crop argument '%s'\n",
+                progname, argv[argn]);
+        exit(EXIT_FAILURE);
       }
 #else
-      select_transform(JXFORM_NONE);    /* force an error */
+      select_transform(JXFORM_NONE);    /* force an error */
 #endif
 
     } else if (keymatch(arg, "debug", 1) || keymatch(arg, "verbose", 1)) {
       /* Enable debug printouts. */
       /* On first -d, print version identification */
       static boolean printed_version = FALSE;
 
       if (! printed_version) {
-        fprintf(stderr, "%s version %s (build %s)\n",
-                PACKAGE_NAME, VERSION, BUILD);
-        fprintf(stderr, "%s\n\n", JCOPYRIGHT);
-        fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
-                JVERSION);
-        printed_version = TRUE;
+        fprintf(stderr, "%s version %s (build %s)\n",
+                PACKAGE_NAME, VERSION, BUILD);
+        fprintf(stderr, "%s\n\n", JCOPYRIGHT);
+        fprintf(stderr, "Emulating The Independent JPEG Group's software, version %s\n\n",
+                JVERSION);
+        printed_version = TRUE;
       }
       cinfo->err->trace_level++;
 
+    } else if (keymatch(arg, "version", 4)) {
+      fprintf(stderr, "%s version %s (build %s)\n",
+              PACKAGE_NAME, VERSION, BUILD);
+      exit(EXIT_SUCCESS);
+
     } else if (keymatch(arg, "flip", 1)) {
       /* Mirror left-right or top-bottom. */
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (keymatch(argv[argn], "horizontal", 1))
-        select_transform(JXFORM_FLIP_H);
+        select_transform(JXFORM_FLIP_H);
       else if (keymatch(argv[argn], "vertical", 1))
-        select_transform(JXFORM_FLIP_V);
+        select_transform(JXFORM_FLIP_V);
       else
-        usage();
+        usage();
 
     } else if (keymatch(arg, "grayscale", 1) || keymatch(arg, "greyscale",1)) {
       /* Force to grayscale. */
 #if TRANSFORMS_SUPPORTED
       transformoption.force_grayscale = TRUE;
 #else
-      select_transform(JXFORM_NONE);    /* force an error */
+      select_transform(JXFORM_NONE);    /* force an error */
 #endif
 
     } else if (keymatch(arg, "maxmemory", 3)) {
       /* Maximum memory in Kb (or Mb with 'm'). */
       long lval;
       char ch = 'x';
 
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
-        usage();
+        usage();
       if (ch == 'm' || ch == 'M')
-        lval *= 1000L;
+        lval *= 1000L;
       cinfo->mem->max_memory_to_use = lval * 1000L;
 
     } else if (keymatch(arg, "optimize", 1) || keymatch(arg, "optimise", 1)) {
       /* Enable entropy parm optimization. */
 #ifdef ENTROPY_OPT_SUPPORTED
       cinfo->optimize_coding = TRUE;
 #else
       fprintf(stderr, "%s: sorry, entropy optimization was not compiled\n",
-              progname);
+              progname);
       exit(EXIT_FAILURE);
 #endif
 
     } else if (keymatch(arg, "outfile", 4)) {
       /* Set output file name. */
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
-      outfilename = argv[argn]; /* save it away for later use */
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
+      outfilename = argv[argn]; /* save it away for later use */
 
     } else if (keymatch(arg, "perfect", 2)) {
       /* Fail if there is any partial edge MCUs that the transform can't
        * handle. */
       transformoption.perfect = TRUE;
 
     } else if (keymatch(arg, "progressive", 2)) {
       /* Select simple progressive mode. */
 #ifdef C_PROGRESSIVE_SUPPORTED
       simple_progressive = TRUE;
       /* We must postpone execution until num_components is known. */
 #else
       fprintf(stderr, "%s: sorry, progressive output was not compiled\n",
-              progname);
+              progname);
       exit(EXIT_FAILURE);
 #endif
 
     } else if (keymatch(arg, "restart", 1)) {
       /* Restart interval in MCU rows (or in MCUs with 'b'). */
       long lval;
       char ch = 'x';
 
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (sscanf(argv[argn], "%ld%c", &lval, &ch) < 1)
-        usage();
+        usage();
       if (lval < 0 || lval > 65535L)
-        usage();
+        usage();
       if (ch == 'b' || ch == 'B') {
-        cinfo->restart_interval = (unsigned int) lval;
-        cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
+        cinfo->restart_interval = (unsigned int) lval;
+        cinfo->restart_in_rows = 0; /* else prior '-restart n' overrides me */
       } else {
-        cinfo->restart_in_rows = (int) lval;
-        /* restart_interval will be computed during startup */
+        cinfo->restart_in_rows = (int) lval;
+        /* restart_interval will be computed during startup */
       }
 
     } else if (keymatch(arg, "rotate", 2)) {
       /* Rotate 90, 180, or 270 degrees (measured clockwise). */
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       if (keymatch(argv[argn], "90", 2))
-        select_transform(JXFORM_ROT_90);
+        select_transform(JXFORM_ROT_90);
       else if (keymatch(argv[argn], "180", 3))
-        select_transform(JXFORM_ROT_180);
+        select_transform(JXFORM_ROT_180);
       else if (keymatch(argv[argn], "270", 3))
-        select_transform(JXFORM_ROT_270);
+        select_transform(JXFORM_ROT_270);
       else
-        usage();
+        usage();
 
     } else if (keymatch(arg, "scans", 1)) {
       /* Set scan script. */
 #ifdef C_MULTISCAN_FILES_SUPPORTED
-      if (++argn >= argc)       /* advance to next argument */
-        usage();
+      if (++argn >= argc)       /* advance to next argument */
+        usage();
       scansarg = argv[argn];
       /* We must postpone reading the file in case -progressive appears. */
 #else
       fprintf(stderr, "%s: sorry, multi-scan output was not compiled\n",
-              progname);
+              progname);
       exit(EXIT_FAILURE);
 #endif
 
     } else if (keymatch(arg, "transpose", 1)) {
       /* Transpose (across UL-to-LR axis). */
       select_transform(JXFORM_TRANSPOSE);
 
     } else if (keymatch(arg, "transverse", 6)) {
       /* Transverse transpose (across UR-to-LL axis). */
       select_transform(JXFORM_TRANSVERSE);
 
     } else if (keymatch(arg, "trim", 3)) {
       /* Trim off any partial edge MCUs that the transform can't handle. */
       transformoption.trim = TRUE;
 
     } else {
-      usage();                  /* bogus switch */
+      usage();                  /* bogus switch */
     }
   }
 
   /* Post-switch-scanning cleanup */
 
   if (for_real) {
 
 #ifdef C_PROGRESSIVE_SUPPORTED
-    if (simple_progressive)     /* process -progressive; -scans can override */
+    if (simple_progressive)     /* process -progressive; -scans can override */
       jpeg_simple_progression(cinfo);
 #endif
 
 #ifdef C_MULTISCAN_FILES_SUPPORTED
-    if (scansarg != NULL)       /* process -scans if it was present */
+    if (scansarg != NULL)       /* process -scans if it was present */
       if (! read_scan_script(cinfo, scansarg))
-        usage();
+        usage();
 #endif
   }
 
-  return argn;                  /* return index of next arg (file name) */
+  return argn;                  /* return index of next arg (file name) */
 }
 
 
 /*
  * The main program.
  */
 
 int
 main (int argc, char **argv)
 {
   struct jpeg_decompress_struct srcinfo;
   struct jpeg_compress_struct dstinfo;
   struct jpeg_error_mgr jsrcerr, jdsterr;
 #ifdef PROGRESS_REPORT
   struct cdjpeg_progress_mgr progress;
 #endif
-  jvirt_barray_ptr * src_coef_arrays;
-  jvirt_barray_ptr * dst_coef_arrays;
+  jvirt_barray_ptr *src_coef_arrays;
+  jvirt_barray_ptr *dst_coef_arrays;
   int file_index;
   /* We assume all-in-memory processing and can therefore use only a
-   * single file pointer for sequential input and output operation. 
+   * single file pointer for sequential input and output operation.
    */
-  FILE * fp;
+  FILE *fp;
 
   /* On Mac, fetch a command line. */
 #ifdef USE_CCOMMAND
   argc = ccommand(&argv);
 #endif
 
   progname = argv[0];
   if (progname == NULL || progname[0] == 0)
-    progname = "jpegtran";      /* in case C library doesn't provide it */
+    progname = "jpegtran";      /* in case C library doesn't provide it */
 
   /* Initialize the JPEG decompression object with default error handling. */
   srcinfo.err = jpeg_std_error(&jsrcerr);
   jpeg_create_decompress(&srcinfo);
   /* Initialize the JPEG compression object with default error handling. */
   dstinfo.err = jpeg_std_error(&jdsterr);
   jpeg_create_compress(&dstinfo);
 
-  /* Now safe to enable signal catcher.
-   * Note: we assume only the decompression object will have virtual arrays.
-   */
-#ifdef NEED_SIGNAL_CATCHER
-  enable_signal_catcher((j_common_ptr) &srcinfo);
-#endif
-
   /* Scan command line to find file names.
    * It is convenient to use just one switch-parsing routine, but the switch
    * values read here are mostly ignored; we will rescan the switches after
    * opening the input file.  Also note that most of the switches affect the
    * destination JPEG object, so we parse into that and then copy over what
    * needs to affects the source too.
    */
 
   file_index = parse_switches(&dstinfo, argc, argv, 0, FALSE);
   jsrcerr.trace_level = jdsterr.trace_level;
   srcinfo.mem->max_memory_to_use = dstinfo.mem->max_memory_to_use;
 
 #ifdef TWO_FILE_COMMANDLINE
   /* Must have either -outfile switch or explicit output file name */
   if (outfilename == NULL) {
     if (file_index != argc-2) {
       fprintf(stderr, "%s: must name one input and one output file\n",
-              progname);
+              progname);
       usage();
     }
     outfilename = argv[file_index+1];
   } else {
     if (file_index != argc-1) {
       fprintf(stderr, "%s: must name one input and one output file\n",
-              progname);
+              progname);
       usage();
     }
   }
 #else
   /* Unix style: expect zero or one file name */
   if (file_index < argc-1) {
     fprintf(stderr, "%s: only one input file\n", progname);
     usage();
   }
 #endif /* TWO_FILE_COMMANDLINE */
@@ skipping 38 matching lines @@
   src_coef_arrays = jpeg_read_coefficients(&srcinfo);
 
   /* Initialize destination compression parameters from source values */
   jpeg_copy_critical_parameters(&srcinfo, &dstinfo);
 
   /* Adjust destination parameters if required by transform options;
    * also find out which set of coefficient arrays will hold the output.
    */
 #if TRANSFORMS_SUPPORTED
   dst_coef_arrays = jtransform_adjust_parameters(&srcinfo, &dstinfo,
-                                                 src_coef_arrays,
-                                                 &transformoption);
+                                                 src_coef_arrays,
+                                                 &transformoption);
 #else
   dst_coef_arrays = src_coef_arrays;
 #endif
 
   /* Close input file, if we opened it.
    * Note: we assume that jpeg_read_coefficients consumed all input
    * until JPEG_REACHED_EOI, and that jpeg_finish_decompress will
    * only consume more while (! cinfo->inputctl->eoi_reached).
    * We cannot call jpeg_finish_decompress here since we still need the
    * virtual arrays allocated from the source object for processing.
@@ skipping 20 matching lines @@
 
   /* Start compressor (note no image data is actually written here) */
   jpeg_write_coefficients(&dstinfo, dst_coef_arrays);
 
   /* Copy to the output file any extra markers that we want to preserve */
   jcopy_markers_execute(&srcinfo, &dstinfo, copyoption);
 
   /* Execute image transformation, if any */
 #if TRANSFORMS_SUPPORTED
   jtransform_execute_transformation(&srcinfo, &dstinfo,
-                                    src_coef_arrays,
-                                    &transformoption);
+                                    src_coef_arrays,
+                                    &transformoption);
 #endif
 
   /* Finish compression and release memory */
   jpeg_finish_compress(&dstinfo);
   jpeg_destroy_compress(&dstinfo);
   (void) jpeg_finish_decompress(&srcinfo);
   jpeg_destroy_decompress(&srcinfo);
 
   /* Close output file, if we opened it */
   if (fp != stdout)
     fclose(fp);
 
 #ifdef PROGRESS_REPORT
   end_progress_monitor((j_common_ptr) &dstinfo);
 #endif
 
   /* All done. */
   exit(jsrcerr.num_warnings + jdsterr.num_warnings ?EXIT_WARNING:EXIT_SUCCESS);
-  return 0;                     /* suppress no-return-value warnings */
+  return 0;                     /* suppress no-return-value warnings */
 }