Updated zlib to 1.2.8

7 files changed, 70 insertions, 53 deletions

diff --git a/zlib/examples/enough.c b/zlib/examples/enough.c
index c40410bad..b99114430 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 72b0882ab..89e484fee 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 e9e878e11..662dec379 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 129347ce3..89e809844 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 d70aacaba..922f878dd 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 c46142673..86f0cecba 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 617a13086..278f9ad07 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;