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authorDenis Bitouzé <dbitouze@wanadoo.fr>2021-02-25 18:23:07 +0000
committerDenis Bitouzé <dbitouze@wanadoo.fr>2021-02-25 18:23:07 +0000
commitc6101f91d071883b48b1b4b51e5eba0f36d9a78d (patch)
tree1bf7f5a881d7a4f5c5bf59d0b2821943dd822372 /Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c
parent07ee7222e389b0777456b427a55c22d0e6ffd267 (diff)
French translation for tlmgr updated
git-svn-id: svn://tug.org/texlive/trunk@57912 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c')
-rw-r--r--Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c2453
1 files changed, 0 insertions, 2453 deletions
diff --git a/Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c b/Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c
deleted file mode 100644
index 16d4e7f4d1c..00000000000
--- a/Build/source/libs/libpng/libpng-src/contrib/tools/pngcp.c
+++ /dev/null
@@ -1,2453 +0,0 @@
-/* pngcp.c
- *
- * Copyright (c) 2016 John Cunningham Bowler
- *
- * Last changed in libpng 1.6.24 [August 4, 2016]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * This is an example of copying a PNG without changes using the png_read_png
- * and png_write_png interfaces. A considerable number of options are provided
- * to manipulate the compression of the PNG data and other compressed chunks.
- *
- * For a more extensive example that uses the transforms see
- * contrib/libtests/pngimage.c in the libpng distribution.
- */
-#include "pnglibconf.h" /* To find how libpng was configured. */
-
-#ifdef PNG_PNGCP_TIMING_SUPPORTED
- /* WARNING:
- *
- * This test is here to allow POSIX.1b extensions to be used if enabled in
- * the compile; specifically the code requires_POSIX_C_SOURCE support of
- * 199309L or later to enable clock_gettime use.
- *
- * IF this causes problems THEN compile with a strict ANSI C compiler and let
- * this code turn on the POSIX features that it minimally requires.
- *
- * IF this does not work there is probably a bug in your ANSI C compiler or
- * your POSIX implementation.
- */
-# define _POSIX_C_SOURCE 199309L
-#else /* No timing support required */
-# define _POSIX_SOURCE 1
-#endif
-
-#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
-# include <config.h>
-#endif
-
-#include <stdio.h>
-
-/* Define the following to use this test against your installed libpng, rather
- * than the one being built here:
- */
-#ifdef PNG_FREESTANDING_TESTS
-# include <png.h>
-#else
-# include "../../png.h"
-#endif
-
-#if PNG_LIBPNG_VER < 10700
- /* READ_PNG and WRITE_PNG were not defined, so: */
-# ifdef PNG_INFO_IMAGE_SUPPORTED
-# ifdef PNG_SEQUENTIAL_READ_SUPPORTED
-# define PNG_READ_PNG_SUPPORTED
-# endif /* SEQUENTIAL_READ */
-# ifdef PNG_WRITE_SUPPORTED
-# define PNG_WRITE_PNG_SUPPORTED
-# endif /* WRITE */
-# endif /* INFO_IMAGE */
-#endif /* pre 1.7.0 */
-
-#if (defined(PNG_READ_PNG_SUPPORTED)) && (defined(PNG_WRITE_PNG_SUPPORTED))
-#include <stdarg.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <limits.h>
-#include <assert.h>
-
-#include <unistd.h>
-#include <sys/stat.h>
-
-#include <zlib.h>
-
-#ifndef PNG_SETJMP_SUPPORTED
-# include <setjmp.h> /* because png.h did *not* include this */
-#endif
-
-#ifdef __cplusplus
-# define voidcast(type, value) static_cast<type>(value)
-#else
-# define voidcast(type, value) (value)
-#endif /* __cplusplus */
-
-#ifdef __GNUC__
- /* Many versions of GCC erroneously report that local variables unmodified
- * within the scope of a setjmp may be clobbered. This hacks round the
- * problem (sometimes) without harming other compilers.
- */
-# define gv volatile
-#else
-# define gv
-#endif
-
-/* 'CLOCK_PROCESS_CPUTIME_ID' is one of the clock timers for clock_gettime. It
- * need not be supported even when clock_gettime is available. It returns the
- * 'CPU' time the process has consumed. 'CPU' time is assumed to include time
- * when the CPU is actually blocked by a pending cache fill but not time
- * waiting for page faults. The attempt is to get a measure of the actual time
- * the implementation takes to read a PNG ignoring the potentially very large IO
- * overhead.
- */
-#ifdef PNG_PNGCP_TIMING_SUPPORTED
-# include <time.h> /* clock_gettime and associated definitions */
-# ifndef CLOCK_PROCESS_CPUTIME_ID
- /* Prevent inclusion of the spurious code: */
-# undef PNG_PNGCP_TIMING_SUPPORTED
-# endif
-#endif /* PNGCP_TIMING */
-
-/* So if the timing feature has been activated: */
-
-/* This structure is used to control the test of a single file. */
-typedef enum
-{
- VERBOSE, /* switches on all messages */
- INFORMATION,
- WARNINGS, /* switches on warnings */
- LIBPNG_WARNING,
- APP_WARNING,
- ERRORS, /* just errors */
- APP_FAIL, /* continuable error - no need to longjmp */
- LIBPNG_ERROR, /* this and higher cause a longjmp */
- LIBPNG_BUG, /* erroneous behavior in libpng */
- APP_ERROR, /* such as out-of-memory in a callback */
- QUIET, /* no normal messages */
- USER_ERROR, /* such as file-not-found */
- INTERNAL_ERROR
-} error_level;
-#define LEVEL_MASK 0xf /* where the level is in 'options' */
-
-#define STRICT 0x010 /* Fail on warnings as well as errors */
-#define LOG 0x020 /* Log pass/fail to stdout */
-#define CONTINUE 0x040 /* Continue on APP_FAIL errors */
-#define SIZES 0x080 /* Report input and output sizes */
-#define SEARCH 0x100 /* Search IDAT compression options */
-#define NOWRITE 0x200 /* Do not write an output file */
-#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
-# define IGNORE_INDEX 0x400 /* Ignore out of range palette indices (BAD!) */
-# ifdef PNG_GET_PALETTE_MAX_SUPPORTED
-# define FIX_INDEX 0x800 /* 'Fix' out of range palette indices (OK) */
-# endif /* GET_PALETTE_MAX */
-#endif /* CHECK_FOR_INVALID_INDEX */
-#define OPTION 0x80000000 /* Used for handling options */
-#define LIST 0x80000001 /* Used for handling options */
-
-/* Result masks apply to the result bits in the 'results' field below; these
- * bits are simple 1U<<error_level. A pass requires either nothing worse than
- * warnings (--relaxes) or nothing worse than information (--strict)
- */
-#define RESULT_STRICT(r) (((r) & ~((1U<<WARNINGS)-1)) == 0)
-#define RESULT_RELAXED(r) (((r) & ~((1U<<ERRORS)-1)) == 0)
-
-/* OPTION DEFINITIONS */
-static const char range_lo[] = "low";
-static const char range_hi[] = "high";
-static const char all[] = "all";
-#define RANGE(lo,hi) { range_lo, lo }, { range_hi, hi }
-typedef struct value_list
-{
- const char *name; /* the command line name of the value */
- int value; /* the actual value to use */
-} value_list;
-
-static const value_list
-#ifdef PNG_SW_COMPRESS_png_level
-vl_compression[] =
-{
- /* Overall compression control. The order controls the search order for
- * 'all'. Since the search is for the smallest the order used is low memory
- * then high speed.
- */
- { "low-memory", PNG_COMPRESSION_LOW_MEMORY },
- { "high-speed", PNG_COMPRESSION_HIGH_SPEED },
- { "high-read-speed", PNG_COMPRESSION_HIGH_READ_SPEED },
- { "low", PNG_COMPRESSION_LOW },
- { "medium", PNG_COMPRESSION_MEDIUM },
- { "old", PNG_COMPRESSION_COMPAT },
- { "high", PNG_COMPRESSION_HIGH },
- { all, 0 }
-},
-#endif /* SW_COMPRESS_png_level */
-
-#if defined(PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED) ||\
- defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED)
-vl_strategy[] =
-{
- /* This controls the order of search. */
- { "huffman", Z_HUFFMAN_ONLY },
- { "RLE", Z_RLE },
- { "fixed", Z_FIXED }, /* the remainder do window searches */
- { "filtered", Z_FILTERED },
- { "default", Z_DEFAULT_STRATEGY },
- { all, 0 }
-},
-#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
-vl_windowBits_text[] =
-{
- { "default", MAX_WBITS/*from zlib*/ },
- { "minimum", 8 },
- RANGE(8, MAX_WBITS/*from zlib*/),
- { all, 0 }
-},
-#endif /* text compression */
-vl_level[] =
-{
- { "default", Z_DEFAULT_COMPRESSION /* this is -1 */ },
- { "none", Z_NO_COMPRESSION },
- { "speed", Z_BEST_SPEED },
- { "best", Z_BEST_COMPRESSION },
- { "0", Z_NO_COMPRESSION },
- RANGE(1, 9), /* this deliberately excludes '0' */
- { all, 0 }
-},
-vl_memLevel[] =
-{
- { "max", MAX_MEM_LEVEL }, /* zlib maximum */
- { "1", 1 }, /* zlib minimum */
- { "default", 8 }, /* zlib default */
- { "2", 2 },
- { "3", 3 },
- { "4", 4 },
- { "5", 5 }, /* for explicit testing */
- RANGE(6, MAX_MEM_LEVEL/*zlib*/), /* exclude 5 and below: zlib bugs */
- { all, 0 }
-},
-#endif /* WRITE_CUSTOMIZE_*COMPRESSION */
-#ifdef PNG_WRITE_FILTER_SUPPORTED
-vl_filter[] =
-{
- { all, PNG_ALL_FILTERS },
- { "off", PNG_NO_FILTERS },
- { "none", PNG_FILTER_NONE },
- { "sub", PNG_FILTER_SUB },
- { "up", PNG_FILTER_UP },
- { "avg", PNG_FILTER_AVG },
- { "paeth", PNG_FILTER_PAETH }
-},
-#endif /* WRITE_FILTER */
-#ifdef PNG_PNGCP_TIMING_SUPPORTED
-# define PNGCP_TIME_READ 1
-# define PNGCP_TIME_WRITE 2
-vl_time[] =
-{
- { "both", PNGCP_TIME_READ+PNGCP_TIME_WRITE },
- { "off", 0 },
- { "read", PNGCP_TIME_READ },
- { "write", PNGCP_TIME_WRITE }
-},
-#endif /* PNGCP_TIMING */
-vl_IDAT_size[] = /* for png_set_IDAT_size */
-{
- { "default", 0x7FFFFFFF },
- { "minimal", 1 },
- RANGE(1, 0x7FFFFFFF)
-},
-#ifndef PNG_SW_IDAT_size
- /* Pre 1.7 API: */
-# define png_set_IDAT_size(p,v) png_set_compression_buffer_size(p, v)
-#endif /* !SW_IDAT_size */
-#define SL 8 /* stack limit in display, below */
-vl_log_depth[] = { { "on", 1 }, { "off", 0 }, RANGE(0, SL) },
-vl_on_off[] = { { "on", 1 }, { "off", 0 } };
-
-#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
-static value_list
-vl_windowBits_IDAT[] =
-{
- { "default", MAX_WBITS },
- { "small", 9 },
- RANGE(8, MAX_WBITS), /* modified by set_windowBits_hi */
- { all, 0 }
-};
-#endif /* IDAT compression */
-
-typedef struct option
-{
- const char *name; /* name of the option */
- png_uint_32 opt; /* an option, or OPTION or LIST */
- png_byte search; /* Search on --search */
- png_byte value_count; /* length of the list of values: */
- const value_list *values; /* values for OPTION or LIST */
-} option;
-
-static const option options[] =
-{
- /* struct display options, these are set when the command line is read */
-# define S(n,v) { #n, v, 0, 2, vl_on_off },
- S(verbose, VERBOSE)
- S(warnings, WARNINGS)
- S(errors, ERRORS)
- S(quiet, QUIET)
- S(strict, STRICT)
- S(log, LOG)
- S(continue, CONTINUE)
- S(sizes, SIZES)
- S(search, SEARCH)
- S(nowrite, NOWRITE)
-# ifdef IGNORE_INDEX
- S(ignore-palette-index, IGNORE_INDEX)
-# endif /* IGNORE_INDEX */
-# ifdef FIX_INDEX
- S(fix-palette-index, FIX_INDEX)
-# endif /* FIX_INDEX */
-# undef S
-
- /* OPTION settings, these and LIST settings are read on demand */
-# define VLNAME(name) vl_ ## name
-# define VLSIZE(name) voidcast(png_byte,\
- (sizeof VLNAME(name))/(sizeof VLNAME(name)[0]))
-# define VL(oname, name, type, search)\
- { oname, type, search, VLSIZE(name), VLNAME(name) },
-# define VLO(oname, name, search) VL(oname, name, OPTION, search)
-
-# ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
-# define VLCIDAT(name) VLO(#name, name, 1/*search*/)
-# ifdef PNG_SW_COMPRESS_level
-# define VLCiCCP(name) VLO("ICC-profile-" #name, name, 0/*search*/)
-# else
-# define VLCiCCP(name)
-# endif
-# else
-# define VLCIDAT(name)
-# define VLCiCCP(name)
-# endif /* WRITE_CUSTOMIZE_COMPRESSION */
-
-# ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
-# define VLCzTXt(name) VLO("text-" #name, name, 0/*search*/)
-# else
-# define VLCzTXt(name)
-# endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */
-
-# define VLC(name) VLCIDAT(name) VLCiCCP(name) VLCzTXt(name)
-
-# ifdef PNG_SW_COMPRESS_png_level
- /* The libpng compression level isn't searched because it justs sets the
- * other things that are searched!
- */
- VLO("compression", compression, 0)
- VLO("text-compression", compression, 0)
- VLO("ICC-profile-compression", compression, 0)
-# endif /* SW_COMPRESS_png_level */
- VLC(strategy)
- VLO("windowBits", windowBits_IDAT, 1)
-# ifdef PNG_SW_COMPRESS_windowBits
- VLO("ICC-profile-windowBits", windowBits_text/*sic*/, 0)
-# endif
- VLO("text-windowBits", windowBits_text, 0)
- VLC(level)
- VLC(memLevel)
- VLO("IDAT-size", IDAT_size, 0)
- VLO("log-depth", log_depth, 0)
-
-# undef VLO
-
- /* LIST settings */
-# define VLL(name, search) VL(#name, name, LIST, search)
-#ifdef PNG_WRITE_FILTER_SUPPORTED
- VLL(filter, 0)
-#endif /* WRITE_FILTER */
-#ifdef PNG_PNGCP_TIMING_SUPPORTED
- VLL(time, 0)
-#endif /* PNGCP_TIMING */
-# undef VLL
-# undef VL
-};
-
-#ifdef __cplusplus
- static const size_t option_count((sizeof options)/(sizeof options[0]));
-#else /* !__cplusplus */
-# define option_count ((sizeof options)/(sizeof options[0]))
-#endif /* !__cplusplus */
-
-static const char *
-cts(int ct)
-{
- switch (ct)
- {
- case PNG_COLOR_TYPE_PALETTE: return "P";
- case PNG_COLOR_TYPE_GRAY: return "G";
- case PNG_COLOR_TYPE_GRAY_ALPHA: return "GA";
- case PNG_COLOR_TYPE_RGB: return "RGB";
- case PNG_COLOR_TYPE_RGB_ALPHA: return "RGBA";
- default: return "INVALID";
- }
-}
-
-struct display
-{
- jmp_buf error_return; /* Where to go to on error */
- unsigned int errset; /* error_return is set */
-
- const char *operation; /* What is happening */
- const char *filename; /* The name of the original file */
- const char *output_file; /* The name of the output file */
-
- /* Used on both read and write: */
- FILE *fp;
-
- /* Used on a read, both the original read and when validating a written
- * image.
- */
- png_alloc_size_t read_size;
- png_structp read_pp;
- png_infop ip;
-# if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED
- png_textp text_ptr; /* stash of text chunks */
- int num_text;
- int text_stashed;
-# endif /* pre 1.7 */
-
-# ifdef PNG_PNGCP_TIMING_SUPPORTED
- struct timespec read_time;
- struct timespec read_time_total;
- struct timespec write_time;
- struct timespec write_time_total;
-# endif /* PNGCP_TIMING */
-
- /* Used to write a new image (the original info_ptr is used) */
-# define MAX_SIZE ((png_alloc_size_t)(-1))
- png_alloc_size_t write_size;
- png_alloc_size_t best_size;
- png_structp write_pp;
-
- /* Base file information */
- png_alloc_size_t size;
- png_uint_32 w;
- png_uint_32 h;
- int bpp;
- png_byte ct;
- int no_warnings; /* Do not output libpng warnings */
- int min_windowBits; /* The windowBits range is 8..8 */
-
- /* Options handling */
- png_uint_32 results; /* A mask of errors seen */
- png_uint_32 options; /* See display_log below */
- png_byte entry[option_count]; /* The selected entry+1 of an option
- * that appears on the command line, or
- * 0 if it was not given. */
- int value[option_count]; /* Corresponding value */
-
- /* Compression exhaustive testing */
- /* Temporary variables used only while testing a single collection of
- * settings:
- */
- unsigned int csp; /* next stack entry to use */
- unsigned int nsp; /* highest active entry+1 found so far */
-
- /* Values used while iterating through all the combinations of settings for a
- * single file:
- */
- unsigned int tsp; /* nsp from the last run; this is the
- * index+1 of the highest active entry on
- * this run; this entry will be advanced.
- */
- int opt_string_start; /* Position in buffer for the first
- * searched option; non-zero if earlier
- * options were set on the command line.
- */
- struct stack
- {
- png_alloc_size_t best_size; /* Best so far for this option */
- png_alloc_size_t lo_size;
- png_alloc_size_t hi_size;
- int lo, hi; /* For binary chop of a range */
- int best_val; /* Best value found so far */
- int opt_string_end; /* End of the option string in 'curr' */
- png_byte opt; /* The option being tested */
- png_byte entry; /* The next value entry to be tested */
- png_byte end; /* This is the last entry */
- } stack[SL]; /* Stack of entries being tested */
- char curr[32*SL]; /* current options being tested */
- char best[32*SL]; /* best options */
-
- char namebuf[FILENAME_MAX]; /* output file name */
-};
-
-static void
-display_init(struct display *dp)
- /* Call this only once right at the start to initialize the control
- * structure, the (struct buffer) lists are maintained across calls - the
- * memory is not freed.
- */
-{
- memset(dp, 0, sizeof *dp);
- dp->operation = "internal error";
- dp->filename = "command line";
- dp->output_file = "no output file";
- dp->options = WARNINGS; /* default to !verbose, !quiet */
- dp->fp = NULL;
- dp->read_pp = NULL;
- dp->ip = NULL;
- dp->write_pp = NULL;
- dp->min_windowBits = -1; /* this is an OPTIND, so -1 won't match anything */
-# if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED
- dp->text_ptr = NULL;
- dp->num_text = 0;
- dp->text_stashed = 0;
-# endif /* pre 1.7 */
-}
-
-static void
-display_clean_read(struct display *dp)
-{
- if (dp->read_pp != NULL)
- png_destroy_read_struct(&dp->read_pp, NULL, NULL);
-
- if (dp->fp != NULL)
- {
- FILE *fp = dp->fp;
- dp->fp = NULL;
- (void)fclose(fp);
- }
-}
-
-static void
-display_clean_write(struct display *dp)
-{
- if (dp->fp != NULL)
- {
- FILE *fp = dp->fp;
- dp->fp = NULL;
- (void)fclose(fp);
- }
-
- if (dp->write_pp != NULL)
- png_destroy_write_struct(&dp->write_pp, dp->tsp > 0 ? NULL : &dp->ip);
-}
-
-static void
-display_clean(struct display *dp)
-{
- display_clean_read(dp);
- display_clean_write(dp);
- dp->output_file = NULL;
-
-# if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED
- /* This is actually created and used by the write code, but only
- * once; it has to be retained for subsequent writes of the same file.
- */
- if (dp->text_stashed)
- {
- dp->text_stashed = 0;
- dp->num_text = 0;
- free(dp->text_ptr);
- dp->text_ptr = NULL;
- }
-# endif /* pre 1.7 */
-
- /* leave the filename for error detection */
- dp->results = 0; /* reset for next time */
-}
-
-static void
-display_destroy(struct display *dp)
-{
- /* Release any memory held in the display. */
- display_clean(dp);
-}
-
-static struct display *
-get_dp(png_structp pp)
- /* The display pointer is always stored in the png_struct error pointer */
-{
- struct display *dp = (struct display*)png_get_error_ptr(pp);
-
- if (dp == NULL)
- {
- fprintf(stderr, "pngcp: internal error (no display)\n");
- exit(99); /* prevents a crash */
- }
-
- return dp;
-}
-
-/* error handling */
-#ifdef __GNUC__
-# define VGATTR __attribute__((__format__ (__printf__,3,4)))
- /* Required to quiet GNUC warnings when the compiler sees a stdarg function
- * that calls one of the stdio v APIs.
- */
-#else
-# define VGATTR
-#endif
-static void VGATTR
-display_log(struct display *dp, error_level level, const char *fmt, ...)
- /* 'level' is as above, fmt is a stdio style format string. This routine
- * does not return if level is above LIBPNG_WARNING
- */
-{
- dp->results |= 1U << level;
-
- if (level > (error_level)(dp->options & LEVEL_MASK))
- {
- const char *lp;
- va_list ap;
-
- switch (level)
- {
- case INFORMATION: lp = "information"; break;
- case LIBPNG_WARNING: lp = "warning(libpng)"; break;
- case APP_WARNING: lp = "warning(pngcp)"; break;
- case APP_FAIL: lp = "error(continuable)"; break;
- case LIBPNG_ERROR: lp = "error(libpng)"; break;
- case LIBPNG_BUG: lp = "bug(libpng)"; break;
- case APP_ERROR: lp = "error(pngcp)"; break;
- case USER_ERROR: lp = "error(user)"; break;
-
- case INTERNAL_ERROR: /* anything unexpected is an internal error: */
- case VERBOSE: case WARNINGS: case ERRORS: case QUIET:
- default: lp = "bug(pngcp)"; break;
- }
-
- fprintf(stderr, "%s: %s: %s",
- dp->filename != NULL ? dp->filename : "<stdin>", lp, dp->operation);
-
- fprintf(stderr, ": ");
-
- va_start(ap, fmt);
- vfprintf(stderr, fmt, ap);
- va_end(ap);
-
- fputc('\n', stderr);
- }
- /* else do not output any message */
-
- /* Errors cause this routine to exit to the fail code */
- if (level > APP_FAIL || (level > ERRORS && !(dp->options & CONTINUE)))
- {
- if (dp->errset)
- longjmp(dp->error_return, level);
-
- else
- exit(99);
- }
-}
-
-#if PNG_LIBPNG_VER < 10700 && defined PNG_TEXT_SUPPORTED
-static void
-text_stash(struct display *dp)
-{
- /* libpng 1.6 and earlier fixed a bug whereby text chunks were written
- * multiple times by png_write_png; the issue was that png_write_png passed
- * the same png_info to both png_write_info and png_write_end. Rather than
- * fixing it by recording the information in the png_struct, or by recording
- * where to write the chunks, the fix made was to change the 'compression'
- * field of the chunk to invalid values, rendering the png_info somewhat
- * useless.
- *
- * The only fix for this given that we use the png_info more than once is to
- * make a copy of the text chunks and png_set_text it each time. This adds a
- * text chunks, so they get replicated, but only the new set gets written
- * each time. This uses memory like crazy but there is no way to delete the
- * useless chunks from the png_info.
- *
- * To make this slightly more efficient only the top level structure is
- * copied; since the old strings are actually preserved (in 1.6 and earlier)
- * this happens to work.
- */
- png_textp chunks = NULL;
-
- dp->num_text = png_get_text(dp->write_pp, dp->ip, &chunks, NULL);
-
- if (dp->num_text > 0)
- {
- dp->text_ptr = voidcast(png_textp, malloc(dp->num_text * sizeof *chunks));
-
- if (dp->text_ptr == NULL)
- display_log(dp, APP_ERROR, "text chunks: stash malloc failed");
-
- else
- memcpy(dp->text_ptr, chunks, dp->num_text * sizeof *chunks);
- }
-
- dp->text_stashed = 1; /* regardless of whether there are chunks or not */
-}
-
-#define text_stash(dp) if (!dp->text_stashed) text_stash(dp)
-
-static void
-text_restore(struct display *dp)
-{
- /* libpng makes a copy, so this is fine: */
- if (dp->text_ptr != NULL)
- png_set_text(dp->write_pp, dp->ip, dp->text_ptr, dp->num_text);
-}
-
-#define text_restore(dp) if (dp->text_stashed) text_restore(dp)
-
-#else
-#define text_stash(dp) ((void)0)
-#define text_restore(dp) ((void)0)
-#endif /* pre 1.7 */
-
-/* OPTIONS:
- *
- * The command handles options of the forms:
- *
- * --option
- * Turn an option on (Option)
- * --no-option
- * Turn an option off (Option)
- * --option=value
- * Set an option to a value (Value)
- * --option=val1,val2,val3
- * Set an option to a bitmask constructed from the values (List)
- */
-static png_byte
-option_index(struct display *dp, const char *opt, size_t len)
- /* Return the index (in options[]) of the given option, outputs an error if
- * it does not exist. Takes the name of the option and a length (number of
- * characters in the name).
- */
-{
- png_byte j;
-
- for (j=0; j<option_count; ++j)
- if (strncmp(options[j].name, opt, len) == 0 && options[j].name[len] == 0)
- return j;
-
- /* If the setjmp buffer is set the code is asking for an option index; this
- * is bad. Otherwise this is the command line option parsing.
- */
- display_log(dp, dp->errset ? INTERNAL_ERROR : USER_ERROR,
- "%.*s: unknown option", (int)/*SAFE*/len, opt);
- abort(); /* NOT REACHED */
-}
-
-/* This works for an option name (no quotes): */
-#define OPTIND(dp, name) option_index(dp, #name, (sizeof #name)-1)
-
-static int
-get_option(struct display *dp, const char *opt, int *value)
-{
- png_byte i = option_index(dp, opt, strlen(opt));
-
- if (dp->entry[i]) /* option was set on command line */
- {
- *value = dp->value[i];
- return 1;
- }
-
- else
- return 0;
-}
-
-static int
-set_opt_string_(struct display *dp, unsigned int sp, png_byte opt,
- const char *entry_name)
- /* Add the appropriate option string to dp->curr. */
-{
- int offset, add;
-
- if (sp > 0)
- offset = dp->stack[sp-1].opt_string_end;
-
- else
- offset = dp->opt_string_start;
-
- if (entry_name == range_lo)
- add = sprintf(dp->curr+offset, " --%s=%d", options[opt].name,
- dp->value[opt]);
-
- else
- add = sprintf(dp->curr+offset, " --%s=%s", options[opt].name, entry_name);
-
- if (add < 0)
- display_log(dp, INTERNAL_ERROR, "sprintf failed");
-
- assert(offset+add < (int)/*SAFE*/sizeof dp->curr);
- return offset+add;
-}
-
-static void
-set_opt_string(struct display *dp, unsigned int sp)
- /* Add the appropriate option string to dp->curr. */
-{
- dp->stack[sp].opt_string_end = set_opt_string_(dp, sp, dp->stack[sp].opt,
- options[dp->stack[sp].opt].values[dp->stack[sp].entry].name);
-}
-
-static void
-record_opt(struct display *dp, png_byte opt, const char *entry_name)
- /* Record this option in dp->curr; called for an option not being searched,
- * the caller passes in the name of the value, or range_lo to use the
- * numerical value.
- */
-{
- unsigned int sp = dp->csp; /* stack entry of next searched option */
-
- if (sp >= dp->tsp)
- {
- /* At top of stack; add the opt string for this entry to the previous
- * searched entry or the start of the dp->curr buffer if there is nothing
- * on the stack yet (sp == 0).
- */
- int offset = set_opt_string_(dp, sp, opt, entry_name);
-
- if (sp > 0)
- dp->stack[sp-1].opt_string_end = offset;
-
- else
- dp->opt_string_start = offset;
- }
-
- /* else do nothing: option already recorded */
-}
-
-static int
-opt_list_end(struct display *dp, png_byte opt, png_byte entry)
-{
- if (options[opt].values[entry].name == range_lo)
- return entry+1U >= options[opt].value_count /* missing range_hi */ ||
- options[opt].values[entry+1U].name != range_hi /* likewise */ ||
- options[opt].values[entry+1U].value <= dp->value[opt] /* range end */;
-
- else
- return entry+1U >= options[opt].value_count /* missing 'all' */ ||
- options[opt].values[entry+1U].name == all /* last entry */;
-}
-
-static void
-push_opt(struct display *dp, unsigned int sp, png_byte opt, int search)
- /* Push a new option onto the stack, initializing the new stack entry
- * appropriately; this does all the work of next_opt (setting end/nsp) for
- * the first entry in the list.
- */
-{
- png_byte entry;
- const char *entry_name;
-
- assert(sp == dp->tsp && sp < SL);
-
- /* The starting entry is entry 0 unless there is a range in which case it is
- * the entry corresponding to range_lo:
- */
- entry = options[opt].value_count;
- assert(entry > 0U);
-
- do
- {
- entry_name = options[opt].values[--entry].name;
- if (entry_name == range_lo)
- break;
- }
- while (entry > 0U);
-
- dp->tsp = sp+1U;
- dp->stack[sp].best_size =
- dp->stack[sp].lo_size =
- dp->stack[sp].hi_size = MAX_SIZE;
-
- if (search && entry_name == range_lo) /* search this range */
- {
- dp->stack[sp].lo = options[opt].values[entry].value;
- /* check for a mal-formed RANGE above: */
- assert(entry+1 < options[opt].value_count &&
- options[opt].values[entry+1].name == range_hi);
- dp->stack[sp].hi = options[opt].values[entry+1].value;
- }
-
- else
- {
- /* next_opt will just iterate over the range. */
- dp->stack[sp].lo = INT_MAX;
- dp->stack[sp].hi = INT_MIN; /* Prevent range chop */
- }
-
- dp->stack[sp].opt = opt;
- dp->stack[sp].entry = entry;
- dp->stack[sp].best_val = dp->value[opt] = options[opt].values[entry].value;
-
- set_opt_string(dp, sp);
-
- /* This works for the search case too; if the range has only one entry 'end'
- * will be marked here.
- */
- if (opt_list_end(dp, opt, entry))
- {
- dp->stack[sp].end = 1;
- /* Skip the warning if pngcp did this itself. See the code in
- * set_windowBits_hi.
- */
- if (opt != dp->min_windowBits)
- display_log(dp, APP_WARNING, "%s: only testing one value",
- options[opt].name);
- }
-
- else
- {
- dp->stack[sp].end = 0;
- dp->nsp = dp->tsp;
- }
-
- /* Do a lazy cache of the text chunks for libpng 1.6 and earlier; this is
- * because they can only be written once(!) so if we are going to re-use the
- * png_info we need a copy.
- */
- text_stash(dp);
-}
-
-static void
-next_opt(struct display *dp, unsigned int sp)
- /* Return the next value for this option. When called 'sp' is expected to be
- * the topmost stack entry - only the topmost entry changes each time round -
- * and there must be a valid entry to return. next_opt will set dp->nsp to
- * sp+1 if more entries are available, otherwise it will not change it and
- * set dp->stack[s].end to true.
- */
-{
- int search = 0;
- png_byte entry, opt;
- const char *entry_name;
-
- /* dp->stack[sp] must be the top stack entry and it must be active: */
- assert(sp+1U == dp->tsp && !dp->stack[sp].end);
-
- opt = dp->stack[sp].opt;
- entry = dp->stack[sp].entry;
- assert(entry+1U < options[opt].value_count);
- entry_name = options[opt].values[entry].name;
- assert(entry_name != NULL);
-
- /* For ranges increment the value but don't change the entry, for all other
- * cases move to the next entry and load its value:
- */
- if (entry_name == range_lo) /* a range */
- {
- /* A range can be iterated over or searched. The default iteration option
- * is indicated by hi < lo on the stack, otherwise the range being search
- * is [lo..hi] (inclusive).
- */
- if (dp->stack[sp].lo > dp->stack[sp].hi)
- dp->value[opt]++;
-
- else
- {
- /* This is the best size found for this option value: */
- png_alloc_size_t best_size = dp->stack[sp].best_size;
- int lo = dp->stack[sp].lo;
- int hi = dp->stack[sp].hi;
- int val = dp->value[opt];
-
- search = 1; /* end is determined here */
- assert(best_size < MAX_SIZE);
-
- if (val == lo)
- {
- /* Finding the best for the low end of the range: */
- dp->stack[sp].lo_size = best_size;
- assert(hi > val);
-
- if (hi == val+1) /* only 2 entries */
- dp->stack[sp].end = 1;
-
- val = hi;
- }
-
- else if (val == hi)
- {
- dp->stack[sp].hi_size = best_size;
- assert(val > lo+1); /* else 'end' set above */
-
- if (val == lo+2) /* only three entries to test */
- dp->stack[sp].end = 1;
-
- val = (lo + val)/2;
- }
-
- else
- {
- png_alloc_size_t lo_size = dp->stack[sp].lo_size;
- png_alloc_size_t hi_size = dp->stack[sp].hi_size;
-
- /* lo and hi should have been tested. */
- assert(lo_size < MAX_SIZE && hi_size < MAX_SIZE);
-
- /* These cases arise with the 'probe' handling below when there is a
- * dip or peak in the size curve.
- */
- if (val < lo) /* probing a new lo */
- {
- /* Swap lo and val: */
- dp->stack[sp].lo = val;
- dp->stack[sp].lo_size = best_size;
- val = lo;
- best_size = lo_size;
- lo = dp->stack[sp].lo;
- lo_size = dp->stack[sp].lo_size;
- }
-
- else if (val > hi) /* probing a new hi */
- {
- /* Swap hi and val: */
- dp->stack[sp].hi = val;
- dp->stack[sp].hi_size = best_size;
- val = hi;
- best_size = hi_size;
- hi = dp->stack[sp].hi;
- hi_size = dp->stack[sp].hi_size;
- }
-
- /* The following should be true or something got messed up above. */
- assert(lo < val && val < hi);
-
- /* If there are only four entries (lo, val, hi plus one more) just
- * test the remaining entry.
- */
- if (hi == lo+3)
- {
- /* Because of the 'probe' code val can either be lo+1 or hi-1; we
- * need to test the other.
- */
- val = lo + ((val == lo+1) ? 2 : 1);
- assert(lo < val && val < hi);
- dp->stack[sp].end = 1;
- }
-
- else
- {
- /* There are at least 2 entries still untested between lo and hi,
- * i.e. hi >= lo+4. 'val' is the midpoint +/- 0.5
- *
- * Separate out the four easy cases when lo..val..hi are
- * monotonically decreased or (more weird) increasing:
- */
- assert(hi > lo+3);
-
- if (lo_size <= best_size && best_size <= hi_size)
- {
- /* Select the low range; testing this first favours the low
- * range over the high range when everything comes out equal.
- * Because of the probing 'val' may be lo+1. In that case end
- * the search and set 'val' to lo+2.
- */
- if (val == lo+1)
- {
- ++val;
- dp->stack[sp].end = 1;
- }
-
- else
- {
- dp->stack[sp].hi = hi = val;
- dp->stack[sp].hi_size = best_size;
- val = (lo + val) / 2;
- }
- }
-
- else if (lo_size >= best_size && best_size >= hi_size)
- {
- /* Monotonically decreasing size; this is the expected case.
- * Select the high end of the range. As above, val may be
- * hi-1.
- */
- if (val == hi-1)
- {
- --val;
- dp->stack[sp].end = 1;
- }
-
- else
- {
- dp->stack[sp].lo = lo = val;
- dp->stack[sp].lo_size = best_size;
- val = (val + hi) / 2;
- }
- }
-
- /* If both those tests failed 'best_size' is either greater than
- * or less than both lo_size and hi_size. There is a peak or dip
- * in the curve of sizes from lo to hi and val is on the peak or
- * dip.
- *
- * Because the ranges being searched as so small (level is 1..9,
- * windowBits 8..15, memLevel 1..9) there will only be at most
- * three untested values between lo..val and val..hi, so solve
- * the problem by probing down from hi or up from lo, whichever
- * is the higher.
- *
- * This is the place where 'val' is set to outside the range
- * lo..hi, described as 'probing', though maybe 'narrowing' would
- * be more accurate.
- */
- else if (lo_size <= hi_size) /* down from hi */
- {
- dp->stack[sp].hi = val;
- dp->stack[sp].hi_size = best_size;
- val = --hi;
- }
-
- else /* up from low */
- {
- dp->stack[sp].lo = val;
- dp->stack[sp].lo_size = best_size;
- val = ++lo;
- }
-
- /* lo and hi are still the true range limits, check for the end
- * condition.
- */
- assert(hi > lo+1);
- if (hi <= lo+2)
- dp->stack[sp].end = 1;
- }
- }
-
- assert(val != dp->stack[sp].best_val); /* should be a new value */
- dp->value[opt] = val;
- dp->stack[sp].best_size = MAX_SIZE;
- }
- }
-
- else
- {
- /* Increment 'entry' */
- dp->value[opt] = options[opt].values[++entry].value;
- dp->stack[sp].entry = entry;
- }
-
- set_opt_string(dp, sp);
-
- if (!search && opt_list_end(dp, opt, entry)) /* end of list */
- dp->stack[sp].end = 1;
-
- else if (!dp->stack[sp].end) /* still active after all these tests */
- dp->nsp = dp->tsp;
-}
-
-static int
-compare_option(const struct display *dp, unsigned int sp)
-{
- int opt = dp->stack[sp].opt;
-
- /* If the best so far is numerically less than the current value the
- * current set of options is invariably worse.
- */
- if (dp->stack[sp].best_val < dp->value[opt])
- return -1;
-
- /* Lists of options are searched out of numerical order (currently only
- * strategy), so only return +1 here when a range is being searched.
- */
- else if (dp->stack[sp].best_val > dp->value[opt])
- {
- if (dp->stack[sp].lo <= dp->stack[sp].hi /*searching*/)
- return 1;
-
- else
- return -1;
- }
-
- else
- return 0; /* match; current value is the best one */
-}
-
-static int
-advance_opt(struct display *dp, png_byte opt, int search)
-{
- unsigned int sp = dp->csp++; /* my stack entry */
-
- assert(sp >= dp->nsp); /* nsp starts off zero */
-
- /* If the entry was active in the previous run dp->stack[sp] is already
- * set up and dp->tsp will be greater than sp, otherwise a new entry
- * needs to be created.
- *
- * dp->nsp is handled this way:
- *
- * 1) When an option is pushed onto the stack dp->nsp and dp->tsp are
- * both set (by push_opt) to the next stack entry *unless* there is
- * only one entry in the new list, in which case dp->stack[sp].end
- * is set.
- *
- * 2) For the top stack entry next_opt is called. The entry must be
- * active (dp->stack[sp].end is not set) and either 'nsp' or 'end'
- * will be updated as appropriate.
- *
- * 3) For lower stack entries nsp is set unless the stack entry is
- * already at the end. This means that when all the higher entries
- * are popped this entry will be too.
- */
- if (sp >= dp->tsp)
- {
- push_opt(dp, sp, opt, search); /* This sets tsp to sp+1 */
- return 1; /* initialized */
- }
-
- else
- {
- int ret = 0; /* unchanged */
-
- /* An option that is already on the stack; update best_size and best_val
- * if appropriate. On the first run there are no previous values and
- * dp->write_size will be MAX_SIZE, however on the first run dp->tsp
- * starts off as 0.
- */
- assert(dp->write_size > 0U && dp->write_size < MAX_SIZE);
-
- if (dp->stack[sp].best_size > dp->write_size ||
- (dp->stack[sp].best_size == dp->write_size &&
- compare_option(dp, sp) > 0))
- {
- dp->stack[sp].best_size = dp->write_size;
- dp->stack[sp].best_val = dp->value[opt];
- }
-
- if (sp+1U >= dp->tsp)
- {
- next_opt(dp, sp);
- ret = 1; /* advanced */
- }
-
- else if (!dp->stack[sp].end) /* Active, not at top of stack */
- dp->nsp = sp+1U;
-
- return ret; /* advanced || unchanged */
- }
-}
-
-static int
-getallopts_(struct display *dp, png_byte opt, int *value, int record)
- /* Like getop but iterate over all the values if the option was set to "all".
- */
-{
- if (dp->entry[opt]) /* option was set on command line */
- {
- /* Simple, single value, entries don't have a stack frame and have a fixed
- * value (it doesn't change once set on the command line). Otherwise the
- * value (entry) selected from the command line is 'all':
- */
- const char *entry_name = options[opt].values[dp->entry[opt]-1].name;
-
- if (entry_name == all)
- (void)advance_opt(dp, opt, 0/*do not search; iterate*/);
-
- else if (record)
- record_opt(dp, opt, entry_name);
-
- *value = dp->value[opt];
- return 1; /* set */
- }
-
- else
- return 0; /* not set */
-}
-
-static int
-getallopts(struct display *dp, const char *opt_str, int *value)
-{
- return getallopts_(dp, option_index(dp, opt_str, strlen(opt_str)), value, 0);
-}
-
-static int
-getsearchopts(struct display *dp, const char *opt_str, int *value)
- /* As above except that if the option was not set try a search */
-{
- png_byte istrat;
- png_byte opt = option_index(dp, opt_str, strlen(opt_str));
- int record = options[opt].search;
- const char *entry_name;
-
- /* If it was set on the command line honour the setting, including 'all'
- * which will override the built in search:
- */
- if (getallopts_(dp, opt, value, record))
- return 1;
-
- else if (!record) /* not a search option */
- return 0; /* unset and not searched */
-
- /* Otherwise decide what to do here. */
- istrat = OPTIND(dp, strategy);
- entry_name = range_lo; /* record the value, not the name */
-
- if (opt == istrat) /* search all strategies */
- (void)advance_opt(dp, opt, 0/*iterate*/), record=0;
-
- else if (opt == OPTIND(dp, level))
- {
- /* Both RLE and HUFFMAN don't benefit from level increases */
- if (dp->value[istrat] == Z_RLE || dp->value[istrat] == Z_HUFFMAN_ONLY)
- dp->value[opt] = 1;
-
- else /* fixed, filtered or default */
- (void)advance_opt(dp, opt, 1/*search*/), record=0;
- }
-
- else if (opt == OPTIND(dp, windowBits))
- {
- /* Changing windowBits for strategies that do not search the window is
- * pointless. Huffman-only does not search, RLE only searches backwards
- * one byte, so given that the maximum string length is 258, a windowBits
- * of 9 is always sufficient.
- */
- if (dp->value[istrat] == Z_HUFFMAN_ONLY)
- dp->value[opt] = 8;
-
- else if (dp->value[istrat] == Z_RLE)
- dp->value[opt] = 9;
-
- else /* fixed, filtered or default */
- (void)advance_opt(dp, opt, 1/*search*/), record=0;
- }
-
- else if (opt == OPTIND(dp, memLevel))
- {
-# if 0
- (void)advance_opt(dp, opt, 0/*all*/), record=0;
-# else
- dp->value[opt] = MAX_MEM_LEVEL;
-# endif
- }
-
- else /* something else */
- assert(0=="reached");
-
- if (record)
- record_opt(dp, opt, entry_name);
-
- /* One of the above searched options: */
- *value = dp->value[opt];
- return 1;
-}
-
-static int
-find_val(struct display *dp, png_byte opt, const char *str, size_t len)
- /* Like option_index but sets (index+i) of the entry in options[opt] that
- * matches str[0..len-1] into dp->entry[opt] as well as returning the actual
- * value.
- */
-{
- int rlo = INT_MAX, rhi = INT_MIN;
- png_byte j, irange = 0;
-
- for (j=1U; j<=options[opt].value_count; ++j)
- {
- if (strncmp(options[opt].values[j-1U].name, str, len) == 0 &&
- options[opt].values[j-1U].name[len] == 0)
- {
- dp->entry[opt] = j;
- return options[opt].values[j-1U].value;
- }
- else if (options[opt].values[j-1U].name == range_lo)
- rlo = options[opt].values[j-1U].value, irange = j;
- else if (options[opt].values[j-1U].name == range_hi)
- rhi = options[opt].values[j-1U].value;
- }
-
- /* No match on the name, but there may be a range. */
- if (irange > 0)
- {
- char *ep = NULL;
- long l = strtol(str, &ep, 0);
-
- if (ep == str+len && l >= rlo && l <= rhi)
- {
- dp->entry[opt] = irange; /* range_lo */
- return (int)/*SAFE*/l;
- }
- }
-
- display_log(dp, dp->errset ? INTERNAL_ERROR : USER_ERROR,
- "%s: unknown value setting '%.*s'", options[opt].name,
- (int)/*SAFE*/len, str);
- abort(); /* NOT REACHED */
-}
-
-static int
-opt_check(struct display *dp, const char *arg)
-{
- assert(dp->errset == 0);
-
- if (arg != NULL && arg[0] == '-' && arg[1] == '-')
- {
- int i = 0, negate = (strncmp(arg+2, "no-", 3) == 0), val;
- png_byte j;
-
- if (negate)
- arg += 5; /* --no- */
-
- else
- arg += 2; /* -- */
-
- /* Find the length (expect arg\0 or arg=) */
- while (arg[i] != 0 && arg[i] != '=') ++i;
-
- /* So arg[0..i-1] is the argument name, this does not return if this isn't
- * a valid option name.
- */
- j = option_index(dp, arg, i);
-
- /* It matcheth an option; check the remainder. */
- if (arg[i] == 0) /* no specified value, use the default */
- {
- val = options[j].values[negate].value;
- dp->entry[j] = (png_byte)/*SAFE*/(negate + 1U);
- }
-
- else
- {
- const char *list = arg + (i+1);
-
- /* Expect a single value here unless this is a list, in which case
- * multiple values are combined.
- */
- if (options[j].opt != LIST)
- {
- /* find_val sets 'dp->entry[j]' to a non-zero value: */
- val = find_val(dp, j, list, strlen(list));
-
- if (negate)
- {
- if (options[j].opt < OPTION)
- val = !val;
-
- else
- {
- display_log(dp, USER_ERROR,
- "%.*s: option=arg cannot be negated", i, arg);
- abort(); /* NOT REACHED */
- }
- }
- }
-
- else /* multiple options separated by ',' characters */
- {
- /* --no-option negates list values from the default, which should
- * therefore be 'all'. Notice that if the option list is empty in
- * this case nothing will be removed and therefore --no-option= is
- * the same as --option.
- */
- if (negate)
- val = options[j].values[0].value;
-
- else
- val = 0;
-
- while (*list != 0) /* allows option= which sets 0 */
- {
- /* A value is terminated by the end of the list or a ','
- * character.
- */
- int v, iv;
-
- iv = 0; /* an index into 'list' */
- while (list[++iv] != 0 && list[iv] != ',') {}
-
- v = find_val(dp, j, list, iv);
-
- if (negate)
- val &= ~v;
-
- else
- val |= v;
-
- list += iv;
- if (*list != 0)
- ++list; /* skip the ',' */
- }
- }
- }
-
- /* 'val' is the new value, store it for use later and debugging: */
- dp->value[j] = val;
-
- if (options[j].opt < LEVEL_MASK)
- {
- /* The handling for error levels is to set the level. */
- if (val) /* Set this level */
- dp->options = (dp->options & ~LEVEL_MASK) | options[j].opt;
-
- else
- display_log(dp, USER_ERROR,
- "%.*s: messages cannot be turned off individually; set a message level",
- i, arg);
- }
-
- else if (options[j].opt < OPTION)
- {
- if (val)
- dp->options |= options[j].opt;
-
- else
- dp->options &= ~options[j].opt;
- }
-
- return 1; /* this is an option */
- }
-
- else
- return 0; /* not an option */
-}
-
-#ifdef PNG_PNGCP_TIMING_SUPPORTED
-static void
-set_timer(struct display *dp, struct timespec *timer)
-{
- /* Do the timing using clock_gettime and the per-process timer. */
- if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, timer))
- {
- display_log(dp, APP_ERROR,
- "CLOCK_PROCESS_CPUTIME_ID: %s: timing disabled\n", strerror(errno));
- dp->value[OPTIND(dp,time)] = 0; /* i.e. off */
- }
-}
-
-static void
-start_timer(struct display *dp, int what)
-{
- if ((dp->value[OPTIND(dp,time)] & what) != 0)
- set_timer(dp, what == PNGCP_TIME_READ ? &dp->read_time : &dp->write_time);
-}
-
-static void
-end_timer(struct display *dp, int what)
-{
- if ((dp->value[OPTIND(dp,time)] & what) != 0)
- {
- struct timespec t, tmp;
-
- set_timer(dp, &t);
-
- if (what == PNGCP_TIME_READ)
- tmp = dp->read_time;
-
- else
- tmp = dp->write_time;
-
- t.tv_sec -= tmp.tv_sec;
- t.tv_nsec -= tmp.tv_nsec;
-
- if (t.tv_nsec < 0)
- {
- --(t.tv_sec);
- t.tv_nsec += 1000000000L;
- }
-
- if (what == PNGCP_TIME_READ)
- dp->read_time = t, tmp = dp->read_time_total;
-
- else
- dp->write_time = t, tmp = dp->write_time_total;
-
- tmp.tv_sec += t.tv_sec;
- tmp.tv_nsec += t.tv_nsec;
-
- if (tmp.tv_nsec >= 1000000000L)
- {
- ++(tmp.tv_sec);
- tmp.tv_nsec -= 1000000000L;
- }
-
- if (what == PNGCP_TIME_READ)
- dp->read_time_total = tmp;
-
- else
- dp->write_time_total = tmp;
- }
-}
-
-static void
-print_time(const char *what, struct timespec t)
-{
- printf("%s %.2lu.%.9ld", what, (unsigned long)t.tv_sec, t.tv_nsec);
-}
-#else /* !PNGCP_TIMING */
-#define start_timer(dp, what) ((void)0)
-#define end_timer(dp, what) ((void)0)
-#endif /* !PNGCP_TIMING */
-
-/* The following is used in main to verify that the final argument is a
- * directory:
- */
-static int
-checkdir(const char *pathname)
-{
- struct stat buf;
- return stat(pathname, &buf) == 0 && S_ISDIR(buf.st_mode);
-}
-
-/* Work out whether a path is valid (if not a display_log occurs), a directory
- * (1 is returned) or a file *or* non-existent (0 is returned).
- *
- * Used for a write path.
- */
-static int
-isdir(struct display *dp, const char *pathname)
-{
- if (pathname == NULL)
- return 0; /* stdout */
-
- else if (pathname[0] == 0)
- return 1; /* empty string */
-
- else
- {
- struct stat buf;
- int ret = stat(pathname, &buf);
-
- if (ret == 0) /* the entry exists */
- {
- if (S_ISDIR(buf.st_mode))
- return 1;
-
- /* Else expect an object that exists and can be written: */
- if (access(pathname, W_OK) != 0)
- display_log(dp, USER_ERROR, "%s: cannot be written (%s)", pathname,
- strerror(errno));
-
- return 0; /* file (exists, can be written) */
- }
-
- else /* an error */
- {
- /* Non-existence is fine, other errors are not: */
- if (errno != ENOENT)
- display_log(dp, USER_ERROR, "%s: invalid output name (%s)",
- pathname, strerror(errno));
-
- return 0; /* file (does not exist) */
- }
- }
-}
-
-static void
-makename(struct display *dp, const char *dir, const char *infile)
-{
- /* Make a name for an output file (and check it). */
- dp->namebuf[0] = 0;
-
- if (dir == NULL || infile == NULL)
- display_log(dp, INTERNAL_ERROR, "NULL name to makename");
-
- else
- {
- size_t dsize = strlen(dir);
-
- if (dsize <= (sizeof dp->namebuf)-2) /* Allow for name + '/' + '\0' */
- {
- size_t isize = strlen(infile);
- size_t istart = isize-1;
-
- /* This should fail before here: */
- if (infile[istart] == '/')
- display_log(dp, INTERNAL_ERROR, "infile with trailing /");
-
- memcpy(dp->namebuf, dir, dsize);
- if (dsize > 0 && dp->namebuf[dsize-1] != '/')
- dp->namebuf[dsize++] = '/';
-
- /* Find the rightmost non-/ character: */
- while (istart > 0 && infile[istart-1] != '/')
- --istart;
-
- isize -= istart;
- infile += istart;
-
- if (dsize+isize < (sizeof dp->namebuf)) /* dsize + infile + '\0' */
- {
- memcpy(dp->namebuf+dsize, infile, isize+1);
-
- if (isdir(dp, dp->namebuf))
- display_log(dp, USER_ERROR, "%s: output file is a directory",
- dp->namebuf);
- }
-
- else
- {
- dp->namebuf[dsize] = 0; /* allowed for: -2 at start */
- display_log(dp, USER_ERROR, "%s%s: output file name too long",
- dp->namebuf, infile);
- }
- }
-
- else
- display_log(dp, USER_ERROR, "%s: output directory name too long", dir);
- }
-}
-
-/* error handler callbacks for libpng */
-static void PNGCBAPI
-display_warning(png_structp pp, png_const_charp warning)
-{
- struct display *dp = get_dp(pp);
-
- /* This is used to prevent repeated warnings while searching */
- if (!dp->no_warnings)
- display_log(get_dp(pp), LIBPNG_WARNING, "%s", warning);
-}
-
-static void PNGCBAPI
-display_error(png_structp pp, png_const_charp error)
-{
- struct display *dp = get_dp(pp);
-
- display_log(dp, LIBPNG_ERROR, "%s", error);
-}
-
-static void
-display_start_read(struct display *dp, const char *filename)
-{
- if (filename != NULL)
- {
- dp->filename = filename;
- dp->fp = fopen(filename, "rb");
- }
-
- else
- {
- dp->filename = "<stdin>";
- dp->fp = stdin;
- }
-
- dp->w = dp->h = 0U;
- dp->bpp = 0U;
- dp->size = 0U;
- dp->read_size = 0U;
-
- if (dp->fp == NULL)
- display_log(dp, USER_ERROR, "file open failed (%s)", strerror(errno));
-}
-
-static void PNGCBAPI
-read_function(png_structp pp, png_bytep data, size_t size)
-{
- struct display *dp = get_dp(pp);
-
- if (size == 0U || fread(data, size, 1U, dp->fp) == 1U)
- dp->read_size += size;
-
- else
- {
- if (feof(dp->fp))
- display_log(dp, LIBPNG_ERROR, "PNG file truncated");
- else
- display_log(dp, LIBPNG_ERROR, "PNG file read failed (%s)",
- strerror(errno));
- }
-}
-
-static void
-read_png(struct display *dp, const char *filename)
-{
- display_clean_read(dp); /* safety */
- display_start_read(dp, filename);
-
- dp->read_pp = png_create_read_struct(PNG_LIBPNG_VER_STRING, dp,
- display_error, display_warning);
- if (dp->read_pp == NULL)
- display_log(dp, LIBPNG_ERROR, "failed to create read struct");
-
-# ifdef PNG_BENIGN_ERRORS_SUPPORTED
- png_set_benign_errors(dp->read_pp, 1/*allowed*/);
-# endif /* BENIGN_ERRORS */
-
-# ifdef FIX_INDEX
- if ((dp->options & FIX_INDEX) != 0)
- png_set_check_for_invalid_index(dp->read_pp, 1/*on, no warning*/);
-# ifdef IGNORE_INDEX
- else
-# endif /* IGNORE_INDEX */
-# endif /* FIX_INDEX */
-# ifdef IGNORE_INDEX
- if ((dp->options & IGNORE_INDEX) != 0) /* DANGEROUS */
- png_set_check_for_invalid_index(dp->read_pp, -1/*off completely*/);
-# endif /* IGNORE_INDEX */
-
- /* The png_read_png API requires us to make the info struct, but it does the
- * call to png_read_info.
- */
- dp->ip = png_create_info_struct(dp->read_pp);
- if (dp->ip == NULL)
- png_error(dp->read_pp, "failed to create info struct");
-
- /* Set the IO handling */
- png_set_read_fn(dp->read_pp, dp, read_function);
-
-# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- png_set_keep_unknown_chunks(dp->read_pp, PNG_HANDLE_CHUNK_ALWAYS, NULL,
- 0);
-# endif /* HANDLE_AS_UNKNOWN */
-
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- /* Remove the user limits, if any */
- png_set_user_limits(dp->read_pp, 0x7fffffff, 0x7fffffff);
-# endif /* SET_USER_LIMITS */
-
- /* Now read the PNG. */
- start_timer(dp, PNGCP_TIME_READ);
- png_read_png(dp->read_pp, dp->ip, 0U/*transforms*/, NULL/*params*/);
- end_timer(dp, PNGCP_TIME_READ);
- dp->w = png_get_image_width(dp->read_pp, dp->ip);
- dp->h = png_get_image_height(dp->read_pp, dp->ip);
- dp->ct = png_get_color_type(dp->read_pp, dp->ip);
- dp->bpp = png_get_bit_depth(dp->read_pp, dp->ip) *
- png_get_channels(dp->read_pp, dp->ip);
- {
- /* png_get_rowbytes should never return 0 because the value is set by the
- * first call to png_set_IHDR, which should have happened by now, but just
- * in case:
- */
- png_alloc_size_t rb = png_get_rowbytes(dp->read_pp, dp->ip);
-
- if (rb == 0)
- png_error(dp->read_pp, "invalid row byte count from libpng");
-
- /* The size calc can overflow. */
- if ((MAX_SIZE-dp->h)/rb < dp->h)
- png_error(dp->read_pp, "image too large");
-
- dp->size = rb * dp->h + dp->h/*filter byte*/;
- }
-
-#ifdef FIX_INDEX
- if (dp->ct == PNG_COLOR_TYPE_PALETTE && (dp->options & FIX_INDEX) != 0)
- {
- int max = png_get_palette_max(dp->read_pp, dp->ip);
- png_colorp palette = NULL;
- int num = -1;
-
- if (png_get_PLTE(dp->read_pp, dp->ip, &palette, &num) != PNG_INFO_PLTE
- || max < 0 || num <= 0 || palette == NULL)
- display_log(dp, LIBPNG_ERROR, "invalid png_get_PLTE result");
-
- if (max >= num)
- {
- /* 'Fix' the palette. */
- int i;
- png_color newpal[256];
-
- for (i=0; i<num; ++i)
- newpal[i] = palette[i];
-
- /* Fill in any remainder with a warning color: */
- for (; i<=max; ++i)
- {
- newpal[i].red = 0xbe;
- newpal[i].green = 0xad;
- newpal[i].blue = 0xed;
- }
-
- png_set_PLTE(dp->read_pp, dp->ip, newpal, i);
- }
- }
-#endif /* FIX_INDEX */
-
- display_clean_read(dp);
- dp->operation = "none";
-}
-
-static void
-display_start_write(struct display *dp, const char *filename)
-{
- assert(dp->fp == NULL);
-
- if ((dp->options & NOWRITE) != 0)
- dp->output_file = "<no write>";
-
- else
- {
- if (filename != NULL)
- {
- dp->output_file = filename;
- dp->fp = fopen(filename, "wb");
- }
-
- else
- {
- dp->output_file = "<stdout>";
- dp->fp = stdout;
- }
-
- if (dp->fp == NULL)
- display_log(dp, USER_ERROR, "%s: file open failed (%s)",
- dp->output_file, strerror(errno));
- }
-}
-
-static void PNGCBAPI
-write_function(png_structp pp, png_bytep data, size_t size)
-{
- struct display *dp = get_dp(pp);
-
- /* The write fail is classed as a USER_ERROR, so --quiet does not turn it
- * off, this seems more likely to be correct.
- */
- if (dp->fp == NULL || fwrite(data, size, 1U, dp->fp) == 1U)
- {
- dp->write_size += size;
- if (dp->write_size < size || dp->write_size == MAX_SIZE)
- png_error(pp, "IDAT size overflow");
- }
-
- else
- display_log(dp, USER_ERROR, "%s: PNG file write failed (%s)",
- dp->output_file, strerror(errno));
-}
-
-/* Compression option, 'method' is never set: there is no choice.
- *
- * IMPORTANT: the order of the entries in this macro determines the preference
- * order when two different combos of two of these options produce an IDAT of
- * the same size. The logic here is to put the things that affect the decoding
- * of the PNG image ahead of those that are relevant only to the encoding.
- */
-#define SET_COMPRESSION\
- SET(strategy, strategy);\
- SET(windowBits, window_bits);\
- SET(level, level);\
- SET(memLevel, mem_level);
-
-#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
-static void
-search_compression(struct display *dp)
-{
- /* Like set_compression below but use a more restricted search than 'all' */
- int val;
-
-# define SET(name, func) if (getsearchopts(dp, #name, &val))\
- png_set_compression_ ## func(dp->write_pp, val);
- SET_COMPRESSION
-# undef SET
-}
-
-static void
-set_compression(struct display *dp)
-{
- int val;
-
-# define SET(name, func) if (getallopts(dp, #name, &val))\
- png_set_compression_ ## func(dp->write_pp, val);
- SET_COMPRESSION
-# undef SET
-}
-
-#ifdef PNG_SW_COMPRESS_level /* 1.7.0+ */
-static void
-set_ICC_profile_compression(struct display *dp)
-{
- int val;
-
-# define SET(name, func) if (getallopts(dp, "ICC-profile-" #name, &val))\
- png_set_ICC_profile_compression_ ## func(dp->write_pp, val);
- SET_COMPRESSION
-# undef SET
-}
-#else
-# define set_ICC_profile_compression(dp) ((void)0)
-#endif
-#else
-# define search_compression(dp) ((void)0)
-# define set_compression(dp) ((void)0)
-# define set_ICC_profile_compression(dp) ((void)0)
-#endif /* WRITE_CUSTOMIZE_COMPRESSION */
-
-#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
-static void
-set_text_compression(struct display *dp)
-{
- int val;
-
-# define SET(name, func) if (getallopts(dp, "text-" #name, &val))\
- png_set_text_compression_ ## func(dp->write_pp, val);
- SET_COMPRESSION
-# undef SET
-}
-#else
-# define set_text_compression(dp) ((void)0)
-#endif /* WRITE_CUSTOMIZE_ZTXT_COMPRESSION */
-
-static void
-write_png(struct display *dp, const char *destname)
-{
- display_clean_write(dp); /* safety */
- display_start_write(dp, destname);
-
- dp->write_pp = png_create_write_struct(PNG_LIBPNG_VER_STRING, dp,
- display_error, display_warning);
-
- if (dp->write_pp == NULL)
- display_log(dp, LIBPNG_ERROR, "failed to create write png_struct");
-
-# ifdef PNG_BENIGN_ERRORS_SUPPORTED
- png_set_benign_errors(dp->write_pp, 1/*allowed*/);
-# endif /* BENIGN_ERRORS */
-
- png_set_write_fn(dp->write_pp, dp, write_function, NULL/*flush*/);
-
-#ifdef IGNORE_INDEX
- if ((dp->options & IGNORE_INDEX) != 0) /* DANGEROUS */
- png_set_check_for_invalid_index(dp->write_pp, -1/*off completely*/);
-#endif /* IGNORE_INDEX */
-
- /* Restore the text chunks when using libpng 1.6 or less; this is a macro
- * which expands to nothing in 1.7+ In earlier versions it tests
- * dp->text_stashed, which is only set (below) *after* the first write.
- */
- text_restore(dp);
-
-# ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
- png_set_keep_unknown_chunks(dp->write_pp, PNG_HANDLE_CHUNK_ALWAYS, NULL,
- 0);
-# endif /* HANDLE_AS_UNKNOWN */
-
-# ifdef PNG_SET_USER_LIMITS_SUPPORTED
- /* Remove the user limits, if any */
- png_set_user_limits(dp->write_pp, 0x7fffffff, 0x7fffffff);
-# endif
-
- /* OPTION HANDLING */
- /* compression outputs, IDAT and zTXt/iTXt: */
- dp->tsp = dp->nsp;
- dp->nsp = dp->csp = 0;
-# ifdef PNG_SW_COMPRESS_png_level
- {
- int val;
-
- /* This sets everything, but then the following options just override
- * the specific settings for ICC profiles and text.
- */
- if (getallopts(dp, "compression", &val))
- png_set_compression(dp->write_pp, val);
-
- if (getallopts(dp, "ICC-profile-compression", &val))
- png_set_ICC_profile_compression(dp->write_pp, val);
-
- if (getallopts(dp, "text-compression", &val))
- png_set_text_compression(dp->write_pp, val);
- }
-# endif /* png_level support */
- if (dp->options & SEARCH)
- search_compression(dp);
- else
- set_compression(dp);
- set_ICC_profile_compression(dp);
- set_text_compression(dp);
-
- {
- int val;
-
- /* The permitted range is 1..0x7FFFFFFF, so the cast is safe */
- if (get_option(dp, "IDAT-size", &val))
- png_set_IDAT_size(dp->write_pp, val);
- }
-
- /* filter handling */
-# ifdef PNG_WRITE_FILTER_SUPPORTED
- {
- int val;
-
- if (get_option(dp, "filter", &val))
- png_set_filter(dp->write_pp, PNG_FILTER_TYPE_BASE, val);
- }
-# endif /* WRITE_FILTER */
-
- /* This just uses the 'read' info_struct directly, it contains the image. */
- dp->write_size = 0U;
- start_timer(dp, PNGCP_TIME_WRITE);
- png_write_png(dp->write_pp, dp->ip, 0U/*transforms*/, NULL/*params*/);
- end_timer(dp, PNGCP_TIME_WRITE);
-
- /* Make sure the file was written ok: */
- if (dp->fp != NULL)
- {
- FILE *fp = dp->fp;
- dp->fp = NULL;
- if (fclose(fp))
- display_log(dp, APP_ERROR, "%s: write failed (%s)",
- destname == NULL ? "stdout" : destname, strerror(errno));
- }
-
- /* Clean it on the way out - if control returns to the caller then the
- * written_file contains the required data.
- */
- display_clean_write(dp);
- dp->operation = "none";
-}
-
-static void
-set_windowBits_hi(struct display *dp)
-{
- /* windowBits is in the range 8..15 but zlib maps '8' to '9' so it is only
- * worth using if the data size is 256 byte or less.
- */
- int wb = MAX_WBITS; /* for large images */
- int i = VLSIZE(windowBits_IDAT);
-
- while (wb > 8 && dp->size <= 1U<<(wb-1)) --wb;
-
- while (--i >= 0) if (VLNAME(windowBits_IDAT)[i].name == range_hi) break;
-
- assert(i > 1); /* vl_windowBits_IDAT always has a RANGE() */
- VLNAME(windowBits_IDAT)[i].value = wb;
-
- assert(VLNAME(windowBits_IDAT)[--i].name == range_lo);
- VLNAME(windowBits_IDAT)[i].value = wb > 8 ? 9 : 8;
-
- /* If wb == 8 then any search has been restricted to just one windowBits
- * entry. Record that here to avoid producing a spurious app-level warning
- * above.
- */
- if (wb == 8)
- dp->min_windowBits = OPTIND(dp, windowBits);
-}
-
-static int
-better_options(const struct display *dp)
-{
- /* Are these options better than the best found so far? Normally the
- * options are tested in preference order, best first, however when doing a
- * search operation on a range the range values are tested out of order. In
- * that case preferable options will get tested later.
- *
- * This function looks through the stack from the bottom up looking for an
- * option that does not match the current best value. When it finds one it
- * checks to see if it is more or less desirable and returns true or false
- * as appropriate.
- *
- * Notice that this means that the order options are pushed onto the stack
- * conveys a priority; lower/earlier options are more important than later
- * ones.
- */
- unsigned int sp;
-
- for (sp=0; sp<dp->csp; ++sp)
- {
- int c = compare_option(dp, sp);
-
- if (c < 0)
- return 0; /* worse */
-
- else if (c > 0)
- return 1; /* better */
- }
-
- assert(0 && "unreached");
-}
-
-static void
-print_search_results(struct display *dp)
-{
- assert(dp->filename != NULL);
- printf("%s [%ld x %ld %d bpp %s, %lu bytes] %lu -> %lu with '%s'\n",
- dp->filename, (unsigned long)dp->w, (unsigned long)dp->h, dp->bpp,
- cts(dp->ct), (unsigned long)dp->size, (unsigned long)dp->read_size,
- (unsigned long)dp->best_size, dp->best);
- fflush(stdout);
-}
-
-static void
-log_search(struct display *dp, unsigned int log_depth)
-{
- /* Log, and reset, the search so far: */
- if (dp->nsp/*next entry to change*/ <= log_depth)
- {
- print_search_results(dp);
- /* Start again with this entry: */
- dp->best_size = MAX_SIZE;
- }
-}
-
-static void
-cp_one_file(struct display *dp, const char *filename, const char *destname)
-{
- unsigned int log_depth;
-
- dp->filename = filename;
- dp->operation = "read";
- dp->no_warnings = 0;
-
- /* Read it then write it: */
- if (filename != NULL && access(filename, R_OK) != 0)
- display_log(dp, USER_ERROR, "%s: invalid file name (%s)",
- filename, strerror(errno));
-
- read_png(dp, filename);
-
- /* But 'destname' may be a directory. */
- dp->operation = "write";
-
- /* Limit the upper end of the windowBits range for this file */
- set_windowBits_hi(dp);
-
- /* For logging, depth to log: */
- {
- int val;
-
- if (get_option(dp, "log-depth", &val) && val >= 0)
- log_depth = (unsigned int)/*SAFE*/val;
-
- else
- log_depth = 0U;
- }
-
- if (destname != NULL) /* else stdout */
- {
- if (isdir(dp, destname))
- {
- makename(dp, destname, filename);
- destname = dp->namebuf;
- }
-
- else if (access(destname, W_OK) != 0 && errno != ENOENT)
- display_log(dp, USER_ERROR, "%s: invalid output name (%s)", destname,
- strerror(errno));
- }
-
- dp->nsp = 0;
- dp->curr[0] = 0; /* acts as a flag for the caller */
- dp->opt_string_start = 0;
- dp->best[0] = 0; /* safety */
- dp->best_size = MAX_SIZE;
- write_png(dp, destname);
-
- /* Initialize the 'best' fields: */
- strcpy(dp->best, dp->curr);
- dp->best_size = dp->write_size;
-
- if (dp->nsp > 0) /* iterating over lists */
- {
- char *tmpname, tmpbuf[(sizeof dp->namebuf) + 4];
- assert(dp->curr[0] == ' ' && dp->tsp > 0);
-
- /* Cancel warnings on subsequent writes */
- log_search(dp, log_depth);
- dp->no_warnings = 1;
-
- /* Make a temporary name for the subsequent tests: */
- if (destname != NULL)
- {
- strcpy(tmpbuf, destname);
- strcat(tmpbuf, ".tmp"); /* space for .tmp allocated above */
- tmpname = tmpbuf;
- }
-
- else
- tmpname = NULL; /* stdout */
-
- /* Loop to find the best option. */
- do
- {
- write_png(dp, tmpname);
-
- /* And compare the sizes (the write function makes sure write_size
- * doesn't overflow.)
- */
- assert(dp->csp > 0);
-
- if (dp->write_size < dp->best_size ||
- (dp->write_size == dp->best_size && better_options(dp)))
- {
- if (destname != NULL && rename(tmpname, destname) != 0)
- display_log(dp, APP_ERROR, "rename %s %s failed (%s)", tmpname,
- destname, strerror(errno));
-
- strcpy(dp->best, dp->curr);
- dp->best_size = dp->write_size;
- }
-
- else if (tmpname != NULL && unlink(tmpname) != 0)
- display_log(dp, APP_WARNING, "unlink %s failed (%s)", tmpname,
- strerror(errno));
-
- log_search(dp, log_depth);
- }
- while (dp->nsp > 0);
-
- /* Do this for the 'sizes' option so that it reports the correct size. */
- dp->write_size = dp->best_size;
- }
-}
-
-static int
-cppng(struct display *dp, const char *file, const char *gv dest)
- /* Exists solely to isolate the setjmp clobbers which some versions of GCC
- * erroneously generate.
- */
-{
- int ret = setjmp(dp->error_return);
-
- if (ret == 0)
- {
- dp->errset = 1;
- cp_one_file(dp, file, dest);
- dp->errset = 0;
- return 0;
- }
-
- else
- {
- dp->errset = 0;
-
- if (ret < ERRORS) /* shouldn't longjmp on warnings */
- display_log(dp, INTERNAL_ERROR, "unexpected return code %d", ret);
-
- return ret;
- }
-}
-
-int
-main(int argc, char **argv)
-{
- /* For each file on the command line test it with a range of transforms */
- int option_end;
- struct display d;
-
- display_init(&d);
-
- d.operation = "options";
- for (option_end = 1;
- option_end < argc && opt_check(&d, argv[option_end]);
- ++option_end)
- {
- }
-
- /* Do a quick check on the directory target case; when there are more than
- * two arguments the last one must be a directory.
- */
- if (!(d.options & NOWRITE) && option_end+2 < argc && !checkdir(argv[argc-1]))
- {
- fprintf(stderr,
- "pngcp: %s: directory required with more than two arguments\n",
- argv[argc-1]);
- return 99;
- }
-
- {
- int errors = 0;
- int i = option_end;
-
- /* Do this at least once; if there are no arguments stdin/stdout are used.
- */
- d.operation = "files";
- do
- {
- const char *infile = NULL;
- const char *outfile = NULL;
- int ret;
-
- if (i < argc)
- {
- infile = argv[i++];
- if (!(d.options & NOWRITE) && i < argc)
- outfile = argv[argc-1];
- }
-
- ret = cppng(&d, infile, outfile);
-
- if (ret)
- {
- if (ret > QUIET) /* abort on user or internal error */
- return 99;
-
- /* An error: the output is meaningless */
- }
-
- else if (d.best[0] != 0)
- {
- /* This result may already have been output, in which case best_size
- * has been reset.
- */
- if (d.best_size < MAX_SIZE)
- print_search_results(&d);
- }
-
- else if (d.options & SIZES)
- {
- printf("%s [%ld x %ld %d bpp %s, %lu bytes] %lu -> %lu [0x%lx]\n",
- infile, (unsigned long)d.w, (unsigned long)d.h, d.bpp,
- cts(d.ct), (unsigned long)d.size, (unsigned long)d.read_size,
- (unsigned long)d.write_size, (unsigned long)d.results);
- fflush(stdout);
- }
-
- /* Here on any return, including failures, except user/internal issues
- */
- {
- int pass = (d.options & STRICT) ?
- RESULT_STRICT(d.results) : RESULT_RELAXED(d.results);
-
- if (!pass)
- ++errors;
-
- if (d.options & LOG)
- {
- int j;
-
- printf("%s: pngcp", pass ? "PASS" : "FAIL");
-
- for (j=1; j<option_end; ++j)
- printf(" %s", argv[j]);
-
- if (infile != NULL)
- printf(" %s", infile);
-
-# ifdef PNG_PNGCP_TIMING_SUPPORTED
- /* When logging output the files for each file, if enabled. */
- if ((d.value[OPTIND(&d,time)] & PNGCP_TIME_READ) != 0)
- print_time(" read", d.read_time);
-
- if ((d.value[OPTIND(&d,time)] & PNGCP_TIME_WRITE) != 0)
- print_time(" write", d.write_time);
-# endif /* PNGCP_TIMING */
-
- printf("\n");
- fflush(stdout);
- }
- }
-
- display_clean(&d);
- }
- while (i+!(d.options & NOWRITE) < argc);
- /* I.e. for write cases after the first time through the loop require
- * there to be at least two arguments left and for the last one to be a
- * directory (this was checked above).
- */
-
- /* Release allocated memory */
- display_destroy(&d);
-
-# ifdef PNG_PNGCP_TIMING_SUPPORTED
- {
- int output = 0;
-
- if ((d.value[OPTIND(&d,time)] & PNGCP_TIME_READ) != 0)
- print_time("read", d.read_time_total), output = 1;
-
- if ((d.value[OPTIND(&d,time)] & PNGCP_TIME_WRITE) != 0)
- {
- if (output) putchar(' ');
- print_time("write", d.write_time_total);
- output = 1;
- }
-
- if (output) putchar('\n');
- }
-# endif /* PNGCP_TIMING */
-
- return errors != 0;
- }
-}
-#else /* !READ_PNG || !WRITE_PNG */
-int
-main(void)
-{
- fprintf(stderr, "pngcp: no support for png_read/write_image\n");
- return 77;
-}
-#endif /* !READ_PNG || !WRITE_PNG */