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authorMark Adler <madler@alumni.caltech.edu>2011-09-09 23:25:27 -0700
committerMark Adler <madler@alumni.caltech.edu>2011-09-09 23:25:27 -0700
commitb1c19ca6d82c98a8be6cd9cad7a9c5fa5e8e634e (patch)
treef0eeb8f52d07819f417411da5104c9d743dd46de /examples
parentabf180a067223611620dd97dd5681df7c7fa7c9b (diff)
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zlib 1.2.3.1v1.2.3.1
Diffstat (limited to 'examples')
-rw-r--r--examples/gzlog.c2
-rw-r--r--examples/zlib_how.html36
-rw-r--r--examples/zpipe.c24
-rw-r--r--examples/zran.c2
4 files changed, 50 insertions, 14 deletions
diff --git a/examples/gzlog.c b/examples/gzlog.c
index f71f817..b6acdef 100644
--- a/examples/gzlog.c
+++ b/examples/gzlog.c
@@ -241,7 +241,7 @@ int gzlog_write(void *obj, char *data, size_t len)
241 some = len; 241 some = len;
242 if (write(log->fd, data, some) != some) 242 if (write(log->fd, data, some) != some)
243 return 1; 243 return 1;
244 log->crc = crc32(log->crc, data, some); 244 log->crc = crc32(log->crc, (unsigned char *)data, some);
245 log->len += some; 245 log->len += some;
246 len -= some; 246 len -= some;
247 data += some; 247 data += some;
diff --git a/examples/zlib_how.html b/examples/zlib_how.html
index 40998db..444ff1c 100644
--- a/examples/zlib_how.html
+++ b/examples/zlib_how.html
@@ -4,7 +4,7 @@
4<head> 4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 5<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
6<title>zlib Usage Example</title> 6<title>zlib Usage Example</title>
7<!-- Copyright (c) 2004 Mark Adler. --> 7<!-- Copyright (c) 2004, 2005 Mark Adler. -->
8</head> 8</head>
9<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#00A000"> 9<body bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#00A000">
10<h2 align="center"> zlib Usage Example </h2> 10<h2 align="center"> zlib Usage Example </h2>
@@ -21,13 +21,16 @@ Without further adieu, here is the program <a href="zpipe.c"><tt>zpipe.c</tt></a
21<pre><b> 21<pre><b>
22/* zpipe.c: example of proper use of zlib's inflate() and deflate() 22/* zpipe.c: example of proper use of zlib's inflate() and deflate()
23 Not copyrighted -- provided to the public domain 23 Not copyrighted -- provided to the public domain
24 Version 1.2 9 November 2004 Mark Adler */ 24 Version 1.4 11 December 2005 Mark Adler */
25 25
26/* Version history: 26/* Version history:
27 1.0 30 Oct 2004 First version 27 1.0 30 Oct 2004 First version
28 1.1 8 Nov 2004 Add void casting for unused return values 28 1.1 8 Nov 2004 Add void casting for unused return values
29 Use switch statement for inflate() return values 29 Use switch statement for inflate() return values
30 1.2 9 Nov 2004 Add assertions to document zlib guarantees 30 1.2 9 Nov 2004 Add assertions to document zlib guarantees
31 1.3 6 Apr 2005 Remove incorrect assertion in inf()
32 1.4 11 Dec 2005 Add hack to avoid MSDOS end-of-line conversions
33 Avoid some compiler warnings for input and output buffers
31 */ 34 */
32</b></pre><!-- --> 35</b></pre><!-- -->
33We now include the header files for the required definitions. From 36We now include the header files for the required definitions. From
@@ -47,6 +50,21 @@ functions <tt>inflateInit()</tt>, <tt>inflate()</tt>, and
47#include &lt;assert.h&gt; 50#include &lt;assert.h&gt;
48#include "zlib.h" 51#include "zlib.h"
49</b></pre><!-- --> 52</b></pre><!-- -->
53This is an ugly hack required to avoid corruption of the input and output data on
54Windows/MS-DOS systems. Without this, those systems would assume that the input and output
55files are text, and try to convert the end-of-line characters from one standard to
56another. That would corrupt binary data, and in particular would render the compressed data unusable.
57This sets the input and output to binary which suppresses the end-of-line conversions.
58<tt>SET_BINARY_MODE()</tt> will be used later on <tt>stdin</tt> and <tt>stdout</tt>, at the beginning of <tt>main()</tt>.
59<pre><b>
60#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
61# include &lt;fcntl.h&gt;
62# include &lt;io.h&gt;
63# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
64#else
65# define SET_BINARY_MODE(file)
66#endif
67</b></pre><!-- -->
50<tt>CHUNK</tt> is simply the buffer size for feeding data to and pulling data 68<tt>CHUNK</tt> is simply the buffer size for feeding data to and pulling data
51from the <em>zlib</em> routines. Larger buffer sizes would be more efficient, 69from the <em>zlib</em> routines. Larger buffer sizes would be more efficient,
52especially for <tt>inflate()</tt>. If the memory is available, buffers sizes 70especially for <tt>inflate()</tt>. If the memory is available, buffers sizes
@@ -80,8 +98,8 @@ is used to pass information to and from the <em>zlib</em> routines, and to maint
80 int ret, flush; 98 int ret, flush;
81 unsigned have; 99 unsigned have;
82 z_stream strm; 100 z_stream strm;
83 char in[CHUNK]; 101 unsigned char in[CHUNK];
84 char out[CHUNK]; 102 unsigned char out[CHUNK];
85</b></pre><!-- --> 103</b></pre><!-- -->
86The first thing we do is to initialize the <em>zlib</em> state for compression using 104The first thing we do is to initialize the <em>zlib</em> state for compression using
87<tt>deflateInit()</tt>. This must be done before the first use of <tt>deflate()</tt>. 105<tt>deflateInit()</tt>. This must be done before the first use of <tt>deflate()</tt>.
@@ -313,8 +331,8 @@ can tell from the <em>zlib</em> stream itself when the stream is complete.
313 int ret; 331 int ret;
314 unsigned have; 332 unsigned have;
315 z_stream strm; 333 z_stream strm;
316 char in[CHUNK]; 334 unsigned char in[CHUNK];
317 char out[CHUNK]; 335 unsigned char out[CHUNK];
318</b></pre><!-- --> 336</b></pre><!-- -->
319The initialization of the state is the same, except that there is no compression level, 337The initialization of the state is the same, except that there is no compression level,
320of course, and two more elements of the structure are initialized. <tt>avail_in</tt> 338of course, and two more elements of the structure are initialized. <tt>avail_in</tt>
@@ -494,6 +512,10 @@ int main(int argc, char **argv)
494{ 512{
495 int ret; 513 int ret;
496 514
515 /* avoid end-of-line conversions */
516 SET_BINARY_MODE(stdin);
517 SET_BINARY_MODE(stdout);
518
497 /* do compression if no arguments */ 519 /* do compression if no arguments */
498 if (argc == 1) { 520 if (argc == 1) {
499 ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION); 521 ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION);
@@ -518,6 +540,6 @@ int main(int argc, char **argv)
518} 540}
519</b></pre> 541</b></pre>
520<hr> 542<hr>
521<i>Copyright (c) 2004 by Mark Adler<br>Last modified 13 November 2004</i> 543<i>Copyright (c) 2004, 2005 by Mark Adler<br>Last modified 11 December 2005</i>
522</body> 544</body>
523</html> 545</html>
diff --git a/examples/zpipe.c b/examples/zpipe.c
index 26abb56..83535d1 100644
--- a/examples/zpipe.c
+++ b/examples/zpipe.c
@@ -1,6 +1,6 @@
1/* zpipe.c: example of proper use of zlib's inflate() and deflate() 1/* zpipe.c: example of proper use of zlib's inflate() and deflate()
2 Not copyrighted -- provided to the public domain 2 Not copyrighted -- provided to the public domain
3 Version 1.2 9 November 2004 Mark Adler */ 3 Version 1.4 11 December 2005 Mark Adler */
4 4
5/* Version history: 5/* Version history:
6 1.0 30 Oct 2004 First version 6 1.0 30 Oct 2004 First version
@@ -8,6 +8,8 @@
8 Use switch statement for inflate() return values 8 Use switch statement for inflate() return values
9 1.2 9 Nov 2004 Add assertions to document zlib guarantees 9 1.2 9 Nov 2004 Add assertions to document zlib guarantees
10 1.3 6 Apr 2005 Remove incorrect assertion in inf() 10 1.3 6 Apr 2005 Remove incorrect assertion in inf()
11 1.4 11 Dec 2005 Add hack to avoid MSDOS end-of-line conversions
12 Avoid some compiler warnings for input and output buffers
11 */ 13 */
12 14
13#include <stdio.h> 15#include <stdio.h>
@@ -15,6 +17,14 @@
15#include <assert.h> 17#include <assert.h>
16#include "zlib.h" 18#include "zlib.h"
17 19
20#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
21# include <fcntl.h>
22# include <io.h>
23# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
24#else
25# define SET_BINARY_MODE(file)
26#endif
27
18#define CHUNK 16384 28#define CHUNK 16384
19 29
20/* Compress from file source to file dest until EOF on source. 30/* Compress from file source to file dest until EOF on source.
@@ -28,8 +38,8 @@ int def(FILE *source, FILE *dest, int level)
28 int ret, flush; 38 int ret, flush;
29 unsigned have; 39 unsigned have;
30 z_stream strm; 40 z_stream strm;
31 char in[CHUNK]; 41 unsigned char in[CHUNK];
32 char out[CHUNK]; 42 unsigned char out[CHUNK];
33 43
34 /* allocate deflate state */ 44 /* allocate deflate state */
35 strm.zalloc = Z_NULL; 45 strm.zalloc = Z_NULL;
@@ -84,8 +94,8 @@ int inf(FILE *source, FILE *dest)
84 int ret; 94 int ret;
85 unsigned have; 95 unsigned have;
86 z_stream strm; 96 z_stream strm;
87 char in[CHUNK]; 97 unsigned char in[CHUNK];
88 char out[CHUNK]; 98 unsigned char out[CHUNK];
89 99
90 /* allocate inflate state */ 100 /* allocate inflate state */
91 strm.zalloc = Z_NULL; 101 strm.zalloc = Z_NULL;
@@ -167,6 +177,10 @@ int main(int argc, char **argv)
167{ 177{
168 int ret; 178 int ret;
169 179
180 /* avoid end-of-line conversions */
181 SET_BINARY_MODE(stdin);
182 SET_BINARY_MODE(stdout);
183
170 /* do compression if no arguments */ 184 /* do compression if no arguments */
171 if (argc == 1) { 185 if (argc == 1) {
172 ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION); 186 ret = def(stdin, stdout, Z_DEFAULT_COMPRESSION);
diff --git a/examples/zran.c b/examples/zran.c
index 8c7717e..617a130 100644
--- a/examples/zran.c
+++ b/examples/zran.c
@@ -351,7 +351,7 @@ int main(int argc, char **argv)
351 int len; 351 int len;
352 off_t offset; 352 off_t offset;
353 FILE *in; 353 FILE *in;
354 struct access *index; 354 struct access *index = NULL;
355 unsigned char buf[CHUNK]; 355 unsigned char buf[CHUNK];
356 356
357 /* open input file */ 357 /* open input file */
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