diff options
Diffstat (limited to 'zlib/examples')
| -rw-r--r-- | zlib/examples/enough.c | 39 | ||||
| -rw-r--r-- | zlib/examples/gun.c | 11 | ||||
| -rw-r--r-- | zlib/examples/gzappend.c | 22 | ||||
| -rw-r--r-- | zlib/examples/gzjoin.c | 13 | ||||
| -rw-r--r-- | zlib/examples/gzlog.c | 21 | ||||
| -rw-r--r-- | zlib/examples/gzlog.h | 6 | ||||
| -rw-r--r-- | zlib/examples/zran.c | 11 |
7 files changed, 70 insertions, 53 deletions
diff --git a/zlib/examples/enough.c b/zlib/examples/enough.c index c40410b..b991144 100644 --- a/zlib/examples/enough.c +++ b/zlib/examples/enough.c @@ -1,7 +1,7 @@ /* enough.c -- determine the maximum size of inflate's Huffman code tables over * all possible valid and complete Huffman codes, subject to a length limit. - * Copyright (C) 2007, 2008 Mark Adler - * Version 1.3 17 February 2008 Mark Adler + * Copyright (C) 2007, 2008, 2012 Mark Adler + * Version 1.4 18 August 2012 Mark Adler */ /* Version history: @@ -14,6 +14,9 @@ 1.3 17 Feb 2008 Add argument for initial root table size Fix bug for initial root table size == max - 1 Use a macro to compute the history index + 1.4 18 Aug 2012 Avoid shifts more than bits in type (caused endless loop!) + Clean up comparisons of different types + Clean up code indentation */ /* @@ -236,8 +239,8 @@ local big_t count(int syms, int len, int left) for (use = least; use <= most; use++) { got = count(syms - use, len + 1, (left - use) << 1); sum += got; - if (got == -1 || sum < got) /* overflow */ - return -1; + if (got == (big_t)0 - 1 || sum < got) /* overflow */ + return (big_t)0 - 1; } /* verify that all recursive calls are productive */ @@ -458,6 +461,7 @@ int main(int argc, char **argv) int n; /* number of symbols to code for this run */ big_t got; /* return value of count() */ big_t sum; /* accumulated number of codes over n */ + code_t word; /* for counting bits in code_t */ /* set up globals for cleanup() */ code = NULL; @@ -466,19 +470,19 @@ int main(int argc, char **argv) /* get arguments -- default to the deflate literal/length code */ syms = 286; - root = 9; + root = 9; max = 15; if (argc > 1) { syms = atoi(argv[1]); if (argc > 2) { root = atoi(argv[2]); - if (argc > 3) - max = atoi(argv[3]); - } + if (argc > 3) + max = atoi(argv[3]); + } } if (argc > 4 || syms < 2 || root < 1 || max < 1) { fputs("invalid arguments, need: [sym >= 2 [root >= 1 [max >= 1]]]\n", - stderr); + stderr); return 1; } @@ -487,18 +491,17 @@ int main(int argc, char **argv) max = syms - 1; /* determine the number of bits in a code_t */ - n = 0; - while (((code_t)1 << n) != 0) - n++; + for (n = 0, word = 1; word; n++, word <<= 1) + ; /* make sure that the calculation of most will not overflow */ - if (max > n || syms - 2 >= (((code_t)0 - 1) >> (max - 1))) { + if (max > n || (code_t)(syms - 2) >= (((code_t)0 - 1) >> (max - 1))) { fputs("abort: code length too long for internal types\n", stderr); return 1; } /* reject impossible code requests */ - if (syms - 1 > ((code_t)1 << max) - 1) { + if ((code_t)(syms - 1) > ((code_t)1 << max) - 1) { fprintf(stderr, "%d symbols cannot be coded in %d bits\n", syms, max); return 1; @@ -532,7 +535,7 @@ int main(int argc, char **argv) for (n = 2; n <= syms; n++) { got = count(n, 1, 2); sum += got; - if (got == -1 || sum < got) { /* overflow */ + if (got == (big_t)0 - 1 || sum < got) { /* overflow */ fputs("abort: can't count that high!\n", stderr); cleanup(); return 1; @@ -556,9 +559,9 @@ int main(int argc, char **argv) } /* find and show maximum inflate table usage */ - if (root > max) /* reduce root to max length */ - root = max; - if (syms < ((code_t)1 << (root + 1))) + if (root > max) /* reduce root to max length */ + root = max; + if ((code_t)syms < ((code_t)1 << (root + 1))) enough(syms); else puts("cannot handle minimum code lengths > root"); diff --git a/zlib/examples/gun.c b/zlib/examples/gun.c index 72b0882..89e484f 100644 --- a/zlib/examples/gun.c +++ b/zlib/examples/gun.c @@ -1,7 +1,7 @@ /* gun.c -- simple gunzip to give an example of the use of inflateBack() - * Copyright (C) 2003, 2005, 2008, 2010 Mark Adler + * Copyright (C) 2003, 2005, 2008, 2010, 2012 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h - Version 1.6 17 January 2010 Mark Adler */ + Version 1.7 12 August 2012 Mark Adler */ /* Version history: 1.0 16 Feb 2003 First version for testing of inflateBack() @@ -18,6 +18,7 @@ 1.4 8 Dec 2006 LZW decompression speed improvements 1.5 9 Feb 2008 Avoid warning in latest version of gcc 1.6 17 Jan 2010 Avoid signed/unsigned comparison warnings + 1.7 12 Aug 2012 Update for z_const usage in zlib 1.2.8 */ /* @@ -85,7 +86,7 @@ struct ind { /* Load input buffer, assumed to be empty, and return bytes loaded and a pointer to them. read() is called until the buffer is full, or until it returns end-of-file or error. Return 0 on error. */ -local unsigned in(void *in_desc, unsigned char **buf) +local unsigned in(void *in_desc, z_const unsigned char **buf) { int ret; unsigned len; @@ -196,7 +197,7 @@ unsigned char match[65280 + 2]; /* buffer for reversed match or gzip file, read error, or write error (a write error indicated by strm->next_in not equal to Z_NULL), or Z_DATA_ERROR for invalid input. */ -local int lunpipe(unsigned have, unsigned char *next, struct ind *indp, +local int lunpipe(unsigned have, z_const unsigned char *next, struct ind *indp, int outfile, z_stream *strm) { int last; /* last byte read by NEXT(), or -1 if EOF */ @@ -383,7 +384,7 @@ local int gunpipe(z_stream *strm, int infile, int outfile) { int ret, first, last; unsigned have, flags, len; - unsigned char *next = NULL; + z_const unsigned char *next = NULL; struct ind ind, *indp; struct outd outd; diff --git a/zlib/examples/gzappend.c b/zlib/examples/gzappend.c index e9e878e..662dec3 100644 --- a/zlib/examples/gzappend.c +++ b/zlib/examples/gzappend.c @@ -1,7 +1,7 @@ /* gzappend -- command to append to a gzip file - Copyright (C) 2003 Mark Adler, all rights reserved - version 1.1, 4 Nov 2003 + Copyright (C) 2003, 2012 Mark Adler, all rights reserved + version 1.2, 11 Oct 2012 This software is provided 'as-is', without any express or implied warranty. In no event will the author be held liable for any damages @@ -39,6 +39,8 @@ * - Keep gzip file clean on appended file read errors * - Use in-place rotate instead of auxiliary buffer * (Why you ask? Because it was fun to write!) + * 1.2 11 Oct 2012 - Fix for proper z_const usage + * - Check for input buffer malloc failure */ /* @@ -170,7 +172,7 @@ typedef struct { int size; /* 1 << size is bytes in buf */ unsigned left; /* bytes available at next */ unsigned char *buf; /* buffer */ - unsigned char *next; /* next byte in buffer */ + z_const unsigned char *next; /* next byte in buffer */ char *name; /* file name for error messages */ } file; @@ -399,14 +401,14 @@ local void gztack(char *name, int gd, z_stream *strm, int last) } /* allocate buffers */ - in = fd == -1 ? NULL : malloc(CHUNK); + in = malloc(CHUNK); out = malloc(CHUNK); - if (out == NULL) bye("out of memory", ""); + if (in == NULL || out == NULL) bye("out of memory", ""); /* compress input file and append to gzip file */ do { /* get more input */ - len = fd == -1 ? 0 : read(fd, in, CHUNK); + len = read(fd, in, CHUNK); if (len == -1) { fprintf(stderr, "gzappend warning: error reading %s, skipping rest ...\n", @@ -453,7 +455,7 @@ local void gztack(char *name, int gd, z_stream *strm, int last) /* clean up and return */ free(out); - if (in != NULL) free(in); + free(in); if (fd > 0) close(fd); } @@ -467,11 +469,13 @@ int main(int argc, char **argv) z_stream strm; /* ignore command name */ - argv++; + argc--; argv++; /* provide usage if no arguments */ if (*argv == NULL) { - printf("gzappend 1.1 (4 Nov 2003) Copyright (C) 2003 Mark Adler\n"); + printf( + "gzappend 1.2 (11 Oct 2012) Copyright (C) 2003, 2012 Mark Adler\n" + ); printf( "usage: gzappend [-level] file.gz [ addthis [ andthis ... ]]\n"); return 0; diff --git a/zlib/examples/gzjoin.c b/zlib/examples/gzjoin.c index 129347c..89e8098 100644 --- a/zlib/examples/gzjoin.c +++ b/zlib/examples/gzjoin.c @@ -1,7 +1,7 @@ /* gzjoin -- command to join gzip files into one gzip file - Copyright (C) 2004 Mark Adler, all rights reserved - version 1.0, 11 Dec 2004 + Copyright (C) 2004, 2005, 2012 Mark Adler, all rights reserved + version 1.2, 14 Aug 2012 This software is provided 'as-is', without any express or implied warranty. In no event will the author be held liable for any damages @@ -27,6 +27,7 @@ * * 1.0 11 Dec 2004 - First version * 1.1 12 Jun 2005 - Changed ssize_t to long for portability + * 1.2 14 Aug 2012 - Clean up for z_const usage */ /* @@ -308,7 +309,7 @@ local void gzcopy(char *name, int clr, unsigned long *crc, unsigned long *tot, /* inflate and copy compressed data, clear last-block bit if requested */ len = 0; zpull(&strm, in); - start = strm.next_in; + start = in->next; last = start[0] & 1; if (last && clr) start[0] &= ~1; @@ -351,7 +352,7 @@ local void gzcopy(char *name, int clr, unsigned long *crc, unsigned long *tot, pos = 0x100 >> pos; last = strm.next_in[-1] & pos; if (last && clr) - strm.next_in[-1] &= ~pos; + in->buf[strm.next_in - in->buf - 1] &= ~pos; } else { /* next last-block bit is in next unused byte */ @@ -364,14 +365,14 @@ local void gzcopy(char *name, int clr, unsigned long *crc, unsigned long *tot, } last = strm.next_in[0] & 1; if (last && clr) - strm.next_in[0] &= ~1; + in->buf[strm.next_in - in->buf] &= ~1; } } } /* update buffer with unused input */ in->left = strm.avail_in; - in->next = strm.next_in; + in->next = in->buf + (strm.next_in - in->buf); /* copy used input, write empty blocks to get to byte boundary */ pos = strm.data_type & 7; diff --git a/zlib/examples/gzlog.c b/zlib/examples/gzlog.c index d70aaca..922f878 100644 --- a/zlib/examples/gzlog.c +++ b/zlib/examples/gzlog.c @@ -1,8 +1,8 @@ /* * gzlog.c - * Copyright (C) 2004, 2008 Mark Adler, all rights reserved + * Copyright (C) 2004, 2008, 2012 Mark Adler, all rights reserved * For conditions of distribution and use, see copyright notice in gzlog.h - * version 2.0, 25 Apr 2008 + * version 2.2, 14 Aug 2012 */ /* @@ -750,7 +750,8 @@ local int log_recover(struct log *log, int op) strcpy(log->end, ".add"); if (stat(log->path, &st) == 0 && st.st_size) { len = (size_t)(st.st_size); - if (len != st.st_size || (data = malloc(st.st_size)) == NULL) { + if ((off_t)len != st.st_size || + (data = malloc(st.st_size)) == NULL) { log_log(log, op, "allocation failure"); return -2; } @@ -758,7 +759,7 @@ local int log_recover(struct log *log, int op) log_log(log, op, ".add file read failure"); return -1; } - ret = read(fd, data, len) != len; + ret = (size_t)read(fd, data, len) != len; close(fd); if (ret) { log_log(log, op, ".add file read failure"); @@ -913,7 +914,7 @@ int gzlog_compress(gzlog *logd) struct log *log = logd; /* check arguments */ - if (log == NULL || strcmp(log->id, LOGID) || len < 0) + if (log == NULL || strcmp(log->id, LOGID)) return -3; /* see if we lost the lock -- if so get it again and reload the extra @@ -952,7 +953,7 @@ int gzlog_compress(gzlog *logd) fd = open(log->path, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (fd < 0) break; - ret = write(fd, data, len) != len; + ret = (size_t)write(fd, data, len) != len; if (ret | close(fd)) break; log_touch(log); @@ -963,7 +964,7 @@ int gzlog_compress(gzlog *logd) if (fd < 0) break; next = DICT > len ? len : DICT; - ret = write(fd, (char *)data + len - next, next) != next; + ret = (size_t)write(fd, (char *)data + len - next, next) != next; if (ret | close(fd)) break; log_touch(log); @@ -997,9 +998,9 @@ int gzlog_write(gzlog *logd, void *data, size_t len) struct log *log = logd; /* check arguments */ - if (log == NULL || strcmp(log->id, LOGID) || len < 0) + if (log == NULL || strcmp(log->id, LOGID)) return -3; - if (data == NULL || len == 0) + if (data == NULL || len <= 0) return 0; /* see if we lost the lock -- if so get it again and reload the extra @@ -1013,7 +1014,7 @@ int gzlog_write(gzlog *logd, void *data, size_t len) fd = open(log->path, O_WRONLY | O_CREAT | O_TRUNC, 0644); if (fd < 0) return -1; - ret = write(fd, data, len) != len; + ret = (size_t)write(fd, data, len) != len; if (ret | close(fd)) return -1; log_touch(log); diff --git a/zlib/examples/gzlog.h b/zlib/examples/gzlog.h index c461426..86f0cec 100644 --- a/zlib/examples/gzlog.h +++ b/zlib/examples/gzlog.h @@ -1,6 +1,6 @@ /* gzlog.h - Copyright (C) 2004, 2008 Mark Adler, all rights reserved - version 2.0, 25 Apr 2008 + Copyright (C) 2004, 2008, 2012 Mark Adler, all rights reserved + version 2.2, 14 Aug 2012 This software is provided 'as-is', without any express or implied warranty. In no event will the author be held liable for any damages @@ -27,6 +27,8 @@ Interface changed slightly in that now path is a prefix Compression now occurs as needed during gzlog_write() gzlog_write() now always leaves the log file as valid gzip + 2.1 8 Jul 2012 Fix argument checks in gzlog_compress() and gzlog_write() + 2.2 14 Aug 2012 Clean up signed comparisons */ /* diff --git a/zlib/examples/zran.c b/zlib/examples/zran.c index 617a130..278f9ad 100644 --- a/zlib/examples/zran.c +++ b/zlib/examples/zran.c @@ -1,7 +1,12 @@ /* zran.c -- example of zlib/gzip stream indexing and random access - * Copyright (C) 2005 Mark Adler + * Copyright (C) 2005, 2012 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h - Version 1.0 29 May 2005 Mark Adler */ + Version 1.1 29 Sep 2012 Mark Adler */ + +/* Version History: + 1.0 29 May 2005 First version + 1.1 29 Sep 2012 Fix memory reallocation error + */ /* Illustrate the use of Z_BLOCK, inflatePrime(), and inflateSetDictionary() for random access of a compressed file. A file containing a zlib or gzip @@ -221,7 +226,7 @@ local int build_index(FILE *in, off_t span, struct access **built) /* clean up and return index (release unused entries in list) */ (void)inflateEnd(&strm); - index = realloc(index, sizeof(struct point) * index->have); + index->list = realloc(index->list, sizeof(struct point) * index->have); index->size = index->have; *built = index; return index->size; |