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-rw-r--r--lib/libz/example.c97
1 files changed, 25 insertions, 72 deletions
diff --git a/lib/libz/example.c b/lib/libz/example.c
index 5b3404a..3830842 100644
--- a/lib/libz/example.c
+++ b/lib/libz/example.c
@@ -1,9 +1,9 @@
/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-1998 Jean-loup Gailly.
+ * Copyright (C) 1995-1996 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-/* @(#) $Id$ */
+/* $FreeBSD$ */
#include <stdio.h>
#include "zlib.h"
@@ -41,7 +41,7 @@ void test_large_deflate OF((Byte *compr, uLong comprLen,
Byte *uncompr, uLong uncomprLen));
void test_large_inflate OF((Byte *compr, uLong comprLen,
Byte *uncompr, uLong uncomprLen));
-void test_flush OF((Byte *compr, uLong *comprLen));
+void test_flush OF((Byte *compr, uLong comprLen));
void test_sync OF((Byte *compr, uLong comprLen,
Byte *uncompr, uLong uncomprLen));
void test_dict_deflate OF((Byte *compr, uLong comprLen));
@@ -69,7 +69,6 @@ void test_compress(compr, comprLen, uncompr, uncomprLen)
if (strcmp((char*)uncompr, hello)) {
fprintf(stderr, "bad uncompress\n");
- exit(1);
} else {
printf("uncompress(): %s\n", uncompr);
}
@@ -87,23 +86,16 @@ void test_gzio(out, in, uncompr, uncomprLen)
int err;
int len = strlen(hello)+1;
gzFile file;
- z_off_t pos;
file = gzopen(out, "wb");
if (file == NULL) {
fprintf(stderr, "gzopen error\n");
exit(1);
}
- gzputc(file, 'h');
- if (gzputs(file, "ello") != 4) {
- fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (gzprintf(file, ", %s!", "hello") != 8) {
- fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
- exit(1);
+
+ if (gzwrite(file, (const voidp)hello, (unsigned)len) != len) {
+ fprintf(stderr, "gzwrite err: %s\n", gzerror(file, &err));
}
- gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
gzclose(file);
file = gzopen(in, "rb");
@@ -115,41 +107,14 @@ void test_gzio(out, in, uncompr, uncomprLen)
uncomprLen = gzread(file, uncompr, (unsigned)uncomprLen);
if (uncomprLen != len) {
fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
- exit(1);
}
+ gzclose(file);
+
if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
- exit(1);
+ fprintf(stderr, "bad gzread\n");
} else {
printf("gzread(): %s\n", uncompr);
}
-
- pos = gzseek(file, -8L, SEEK_CUR);
- if (pos != 6 || gztell(file) != pos) {
- fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
- pos, gztell(file));
- exit(1);
- }
-
- if (gzgetc(file) != ' ') {
- fprintf(stderr, "gzgetc error\n");
- exit(1);
- }
-
- gzgets(file, (char*)uncompr, uncomprLen);
- uncomprLen = strlen((char*)uncompr);
- if (uncomprLen != 6) { /* "hello!" */
- fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (strcmp((char*)uncompr, hello+7)) {
- fprintf(stderr, "bad gzgets after gzseek\n");
- exit(1);
- } else {
- printf("gzgets() after gzseek: %s\n", uncompr);
- }
-
- gzclose(file);
}
/* ===========================================================================
@@ -206,13 +171,12 @@ void test_inflate(compr, comprLen, uncompr, uncomprLen)
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
- d_stream.next_in = compr;
- d_stream.avail_in = 0;
- d_stream.next_out = uncompr;
-
err = inflateInit(&d_stream);
CHECK_ERR(err, "inflateInit");
+ d_stream.next_in = compr;
+ d_stream.next_out = uncompr;
+
while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
err = inflate(&d_stream, Z_NO_FLUSH);
@@ -225,7 +189,6 @@ void test_inflate(compr, comprLen, uncompr, uncomprLen)
if (strcmp((char*)uncompr, hello)) {
fprintf(stderr, "bad inflate\n");
- exit(1);
} else {
printf("inflate(): %s\n", uncompr);
}
@@ -260,7 +223,6 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
CHECK_ERR(err, "deflate");
if (c_stream.avail_in != 0) {
fprintf(stderr, "deflate not greedy\n");
- exit(1);
}
/* Feed in already compressed data and switch to no compression: */
@@ -280,7 +242,6 @@ void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
err = deflate(&c_stream, Z_FINISH);
if (err != Z_STREAM_END) {
fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
}
err = deflateEnd(&c_stream);
CHECK_ERR(err, "deflateEnd");
@@ -302,12 +263,12 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
err = inflateInit(&d_stream);
CHECK_ERR(err, "inflateInit");
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
for (;;) {
d_stream.next_out = uncompr; /* discard the output */
d_stream.avail_out = (uInt)uncomprLen;
@@ -321,7 +282,6 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
- exit(1);
} else {
printf("large_inflate(): OK\n");
}
@@ -332,7 +292,7 @@ void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
*/
void test_flush(compr, comprLen)
Byte *compr;
- uLong *comprLen;
+ uLong comprLen;
{
z_stream c_stream; /* compression stream */
int err;
@@ -348,7 +308,7 @@ void test_flush(compr, comprLen)
c_stream.next_in = (Bytef*)hello;
c_stream.next_out = compr;
c_stream.avail_in = 3;
- c_stream.avail_out = (uInt)*comprLen;
+ c_stream.avail_out = (uInt)comprLen;
err = deflate(&c_stream, Z_FULL_FLUSH);
CHECK_ERR(err, "deflate");
@@ -361,8 +321,6 @@ void test_flush(compr, comprLen)
}
err = deflateEnd(&c_stream);
CHECK_ERR(err, "deflateEnd");
-
- *comprLen = c_stream.total_out;
}
/* ===========================================================================
@@ -381,13 +339,12 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
- d_stream.next_in = compr;
- d_stream.avail_in = 2; /* just read the zlib header */
-
err = inflateInit(&d_stream);
CHECK_ERR(err, "inflateInit");
+ d_stream.next_in = compr;
d_stream.next_out = uncompr;
+ d_stream.avail_in = 2; /* just read the zlib header */
d_stream.avail_out = (uInt)uncomprLen;
inflate(&d_stream, Z_NO_FLUSH);
@@ -401,7 +358,6 @@ void test_sync(compr, comprLen, uncompr, uncomprLen)
if (err != Z_DATA_ERROR) {
fprintf(stderr, "inflate should report DATA_ERROR\n");
/* Because of incorrect adler32 */
- exit(1);
}
err = inflateEnd(&d_stream);
CHECK_ERR(err, "inflateEnd");
@@ -440,7 +396,6 @@ void test_dict_deflate(compr, comprLen)
err = deflate(&c_stream, Z_FINISH);
if (err != Z_STREAM_END) {
fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
}
err = deflateEnd(&c_stream);
CHECK_ERR(err, "deflateEnd");
@@ -462,12 +417,12 @@ void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
d_stream.zfree = (free_func)0;
d_stream.opaque = (voidpf)0;
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
err = inflateInit(&d_stream);
CHECK_ERR(err, "inflateInit");
+ d_stream.next_in = compr;
+ d_stream.avail_in = (uInt)comprLen;
+
d_stream.next_out = uncompr;
d_stream.avail_out = (uInt)uncomprLen;
@@ -490,7 +445,6 @@ void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
if (strcmp((char*)uncompr, hello)) {
fprintf(stderr, "bad inflate with dict\n");
- exit(1);
} else {
printf("inflate with dictionary: %s\n", uncompr);
}
@@ -507,9 +461,8 @@ int main(argc, argv)
Byte *compr, *uncompr;
uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
uLong uncomprLen = comprLen;
- static const char* myVersion = ZLIB_VERSION;
- if (zlibVersion()[0] != myVersion[0]) {
+ if (zlibVersion()[0] != ZLIB_VERSION[0]) {
fprintf(stderr, "incompatible zlib version\n");
exit(1);
@@ -526,6 +479,7 @@ int main(argc, argv)
printf("out of memory\n");
exit(1);
}
+
test_compress(compr, comprLen, uncompr, uncomprLen);
test_gzio((argc > 1 ? argv[1] : "foo.gz"),
@@ -538,9 +492,8 @@ int main(argc, argv)
test_large_deflate(compr, comprLen, uncompr, uncomprLen);
test_large_inflate(compr, comprLen, uncompr, uncomprLen);
- test_flush(compr, &comprLen);
+ test_flush(compr, comprLen);
test_sync(compr, comprLen, uncompr, uncomprLen);
- comprLen = uncomprLen;
test_dict_deflate(compr, comprLen);
test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
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