#include <stdio.h>

#include "zlib.h"

#ifdef STDC

# include <string.h>

# include <stdlib.h>

#if defined(VMS) || defined(RISCOS)

# define TESTFILE "foo-gz"

# define TESTFILE "foo.gz"

#define CHECK_ERR(err, msg) { \

if (err != Z_OK) { \

fprintf(stderr, "%s error: %d\n", msg, err); \

exit(1); \

} \

}

const char hello[] = "hello, hello!";

const char dictionary[] = "hello";

uLong dictId; /* Adler32 value of the dictionary */

void test_compress OF((Byte *compr, uLong comprLen,

Byte *uncompr, uLong uncomprLen));

void test_gzio OF((const char *fname,

Byte *uncompr, uLong uncomprLen));

void test_deflate OF((Byte *compr, uLong comprLen));

void test_inflate OF((Byte *compr, uLong comprLen,

Byte *uncompr, uLong uncomprLen));

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_sync OF((Byte *compr, uLong comprLen,

Byte *uncompr, uLong uncomprLen));

void test_dict_deflate OF((Byte *compr, uLong comprLen));

void test_dict_inflate OF((Byte *compr, uLong comprLen,

Byte *uncompr, uLong uncomprLen));

int main OF((int argc, char *argv[]));

void test_compress(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

int err;

uLong len = (uLong)strlen(hello)+1;

err = compress(compr, &comprLen, (const Bytef*)hello, len);

CHECK_ERR(err, "compress");

strcpy((char*)uncompr, "garbage");

err = uncompress(uncompr, &uncomprLen, compr, comprLen);

CHECK_ERR(err, "uncompress");

if (strcmp((char*)uncompr, hello)) {

fprintf(stderr, "bad uncompress\n");

exit(1);

} else {

printf("uncompress(): %s\n", (char *)uncompr);

}

}

void test_gzio(fname, uncompr, uncomprLen)

const char *fname; /* compressed file name */

Byte *uncompr;

uLong uncomprLen;

{

#ifdef NO_GZCOMPRESS

fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");

int err;

int len = (int)strlen(hello)+1;

gzFile file;

z_off_t pos;

file = gzopen(fname, "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);

}

gzseek(file, 1L, SEEK_CUR); /* add one zero byte */

gzclose(file);

file = gzopen(fname, "rb");

if (file == NULL) {

fprintf(stderr, "gzopen error\n");

exit(1);

}

strcpy((char*)uncompr, "garbage");

if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {

fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));

exit(1);

}

if (strcmp((char*)uncompr, hello)) {

fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);

exit(1);

} else {

printf("gzread(): %s\n", (char*)uncompr);

}

pos = gzseek(file, -8L, SEEK_CUR);

if (pos != 6 || gztell(file) != pos) {

fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",

(long)pos, (long)gztell(file));

exit(1);

}

if (gzgetc(file) != ' ') {

fprintf(stderr, "gzgetc error\n");

exit(1);

}

if (gzungetc(' ', file) != ' ') {

fprintf(stderr, "gzungetc error\n");

exit(1);

}

gzgets(file, (char*)uncompr, (int)uncomprLen);

if (strlen((char*)uncompr) != 7) { /* " hello!" */

fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));

exit(1);

}

if (strcmp((char*)uncompr, hello + 6)) {

fprintf(stderr, "bad gzgets after gzseek\n");

exit(1);

} else {

printf("gzgets() after gzseek: %s\n", (char*)uncompr);

}

gzclose(file);

}

void test_deflate(compr, comprLen)

Byte *compr;

uLong comprLen;

{

z_stream c_stream; /* compression stream */

int err;

uLong len = (uLong)strlen(hello)+1;

c_stream.zalloc = (alloc_func)0;

c_stream.zfree = (free_func)0;

c_stream.opaque = (voidpf)0;

err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);

CHECK_ERR(err, "deflateInit");

c_stream.next_in = (Bytef*)hello;

c_stream.next_out = compr;

while (c_stream.total_in != len && c_stream.total_out < comprLen) {

c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */

err = deflate(&c_stream, Z_NO_FLUSH);

CHECK_ERR(err, "deflate");

}

/* Finish the stream, still forcing small buffers: */

for (;;) {

c_stream.avail_out = 1;

err = deflate(&c_stream, Z_FINISH);

if (err == Z_STREAM_END) break;

CHECK_ERR(err, "deflate");

}

err = deflateEnd(&c_stream);

CHECK_ERR(err, "deflateEnd");

}

void test_inflate(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

int err;

z_stream d_stream; /* decompression stream */

strcpy((char*)uncompr, "garbage");

d_stream.zalloc = (alloc_func)0;

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");

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);

if (err == Z_STREAM_END) break;

CHECK_ERR(err, "inflate");

}

err = inflateEnd(&d_stream);

CHECK_ERR(err, "inflateEnd");

if (strcmp((char*)uncompr, hello)) {

fprintf(stderr, "bad inflate\n");

exit(1);

} else {

printf("inflate(): %s\n", (char *)uncompr);

}

}

void test_large_deflate(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

z_stream c_stream; /* compression stream */

int err;

c_stream.zalloc = (alloc_func)0;

c_stream.zfree = (free_func)0;

c_stream.opaque = (voidpf)0;

err = deflateInit(&c_stream, Z_BEST_SPEED);

CHECK_ERR(err, "deflateInit");

c_stream.next_out = compr;

c_stream.avail_out = (uInt)comprLen;

/* At this point, uncompr is still mostly zeroes, so it should compress

c_stream.next_in = uncompr;

c_stream.avail_in = (uInt)uncomprLen;

err = deflate(&c_stream, Z_NO_FLUSH);

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: */

deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);

c_stream.next_in = compr;

c_stream.avail_in = (uInt)comprLen/2;

err = deflate(&c_stream, Z_NO_FLUSH);

CHECK_ERR(err, "deflate");

/* Switch back to compressing mode: */

deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);

c_stream.next_in = uncompr;

c_stream.avail_in = (uInt)uncomprLen;

err = deflate(&c_stream, Z_NO_FLUSH);

CHECK_ERR(err, "deflate");

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");

}

void test_large_inflate(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

int err;

z_stream d_stream; /* decompression stream */

strcpy((char*)uncompr, "garbage");

d_stream.zalloc = (alloc_func)0;

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");

for (;;) {

d_stream.next_out = uncompr; /* discard the output */

d_stream.avail_out = (uInt)uncomprLen;

err = inflate(&d_stream, Z_NO_FLUSH);

if (err == Z_STREAM_END) break;

CHECK_ERR(err, "large inflate");

}

err = inflateEnd(&d_stream);

CHECK_ERR(err, "inflateEnd");

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");

}

}

void test_flush(compr, comprLen)

Byte *compr;

uLong *comprLen;

{

z_stream c_stream; /* compression stream */

int err;

uInt len = (uInt)strlen(hello)+1;

c_stream.zalloc = (alloc_func)0;

c_stream.zfree = (free_func)0;

c_stream.opaque = (voidpf)0;

err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);

CHECK_ERR(err, "deflateInit");

c_stream.next_in = (Bytef*)hello;

c_stream.next_out = compr;

c_stream.avail_in = 3;

c_stream.avail_out = (uInt)*comprLen;

err = deflate(&c_stream, Z_FULL_FLUSH);

CHECK_ERR(err, "deflate");

compr[3]++; /* force an error in first compressed block */

c_stream.avail_in = len - 3;

err = deflate(&c_stream, Z_FINISH);

if (err != Z_STREAM_END) {

CHECK_ERR(err, "deflate");

}

err = deflateEnd(&c_stream);

CHECK_ERR(err, "deflateEnd");

*comprLen = c_stream.total_out;

}

void test_sync(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

int err;

z_stream d_stream; /* decompression stream */

strcpy((char*)uncompr, "garbage");

d_stream.zalloc = (alloc_func)0;

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_out = uncompr;

d_stream.avail_out = (uInt)uncomprLen;

inflate(&d_stream, Z_NO_FLUSH);

CHECK_ERR(err, "inflate");

d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */

err = inflateSync(&d_stream); /* but skip the damaged part */

CHECK_ERR(err, "inflateSync");

err = inflate(&d_stream, Z_FINISH);

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");

printf("after inflateSync(): hel%s\n", (char *)uncompr);

}

void test_dict_deflate(compr, comprLen)

Byte *compr;

uLong comprLen;

{

z_stream c_stream; /* compression stream */

int err;

c_stream.zalloc = (alloc_func)0;

c_stream.zfree = (free_func)0;

c_stream.opaque = (voidpf)0;

err = deflateInit(&c_stream, Z_BEST_COMPRESSION);

CHECK_ERR(err, "deflateInit");

err = deflateSetDictionary(&c_stream,

(const Bytef*)dictionary, sizeof(dictionary));

CHECK_ERR(err, "deflateSetDictionary");

dictId = c_stream.adler;

c_stream.next_out = compr;

c_stream.avail_out = (uInt)comprLen;

c_stream.next_in = (Bytef*)hello;

c_stream.avail_in = (uInt)strlen(hello)+1;

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");

}

void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)

Byte *compr, *uncompr;

uLong comprLen, uncomprLen;

{

int err;

z_stream d_stream; /* decompression stream */

strcpy((char*)uncompr, "garbage");

d_stream.zalloc = (alloc_func)0;

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_out = uncompr;

d_stream.avail_out = (uInt)uncomprLen;

for (;;) {

err = inflate(&d_stream, Z_NO_FLUSH);

if (err == Z_STREAM_END) break;

if (err == Z_NEED_DICT) {

if (d_stream.adler != dictId) {

fprintf(stderr, "unexpected dictionary");

exit(1);

}

err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,

sizeof(dictionary));

}

CHECK_ERR(err, "inflate with dict");

}

err = inflateEnd(&d_stream);

CHECK_ERR(err, "inflateEnd");

if (strcmp((char*)uncompr, hello)) {

fprintf(stderr, "bad inflate with dict\n");

exit(1);

} else {

printf("inflate with dictionary: %s\n", (char *)uncompr);

}

}

int main(argc, argv)

int argc;

char *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]) {

fprintf(stderr, "incompatible zlib version\n");

exit(1);

} else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {

fprintf(stderr, "warning: different zlib version\n");

}

printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",

ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());

compr = (Byte*)calloc((uInt)comprLen, 1);

uncompr = (Byte*)calloc((uInt)uncomprLen, 1);

/* compr and uncompr are cleared to avoid reading uninitialized

if (compr == Z_NULL || uncompr == Z_NULL) {

printf("out of memory\n");

exit(1);

}

test_compress(compr, comprLen, uncompr, uncomprLen);

test_gzio((argc > 1 ? argv[1] : TESTFILE),

uncompr, uncomprLen);

test_deflate(compr, comprLen);

test_inflate(compr, comprLen, uncompr, uncomprLen);

test_large_deflate(compr, comprLen, uncompr, uncomprLen);

test_large_inflate(compr, comprLen, uncompr, uncomprLen);

test_flush(compr, &comprLen);

test_sync(compr, comprLen, uncompr, uncomprLen);

comprLen = uncomprLen;

test_dict_deflate(compr, comprLen);

test_dict_inflate(compr, comprLen, uncompr, uncomprLen);

free(compr);

free(uncompr);

return 0;

}