大家好，
我正在尝试使用dev-c++让zpipe演示程序运行，我已经导入了所有的zlib代码，并使用zpipe.c作为示例。一切都编译并运行正常。如果我尝试使用注释掉的deflateInit2调用创建gzip文件，它会在没有错误的情况下创建，但在使用7zip解压缩时会损坏。如果我使用标准的zlib头文件来创建文件，在使用相应的inflate调用进行解压缩时，它会给我返回-3/Z_DATA_ERROR，表示我的defalte数据已损坏。一切都指向def函数出现问题，但它几乎完全按照示例。
有什么想法吗？非常感谢！
int main(int argc, char **argv)
{
int ret;
FILE *source;
FILE *zip;
FILE *zipped;
FILE *back;
source = fopen ("C:\\Users\\schmoudm\\Pictures\\caela.jpg", "r");
zip = fopen ("C:\\Core\\RD\\test.gz", "w");
printf ("calling def \n");
ret = def(source, zip, Z_DEFAULT_COMPRESSION);
printf("def return: %i \n", ret);
fclose(source);
fclose(zip);
if (ret == 0) {
printf ("setting up inf \n");
zipped = fopen ("C:\\Core\\RD\\test.gz", "r");
back = fopen ("C:\\Core\\RD\\zlibout.txt", "w");
printf ("calling inf \n");
ret = inf(zipped, back);
printf("inf return: %i \n", ret);
zerr(ret);
}
fclose(source);
fclose(zip);
printf("DONE!");
system("PAUSE");
return 0;
}
int def(FILE *source, FILE *dest, int level)
{
int ret, flush;
unsigned have;
z_stream strm;
unsigned char in[CHUNK];
unsigned char out[CHUNK];
/* allocate deflate state */
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
ret = deflateInit(&strm, Z_DEFAULT_COMPRESSION);
//ret = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, (15+16), 8, Z_DEFAULT_STRATEGY);
if (ret != Z_OK)
return ret;
/* compress until end of file */
do {
strm.avail_in = fread(in, 1, CHUNK, source);
printf("available in: %u \n", strm.avail_in);
if (ferror(source)) {
(void)deflateEnd(&strm);
return Z_ERRNO;
}
flush = feof(source) ? Z_FINISH : Z_NO_FLUSH;
strm.next_in = in;
/* run deflate() on input until output buffer not full, finish
compression if all of source has been read in */
do {
strm.avail_out = CHUNK;
strm.next_out = out;
ret = deflate(&strm, flush); /* no bad return value */
assert(ret != Z_STREAM_ERROR); /* state not clobbered */
have = CHUNK - strm.avail_out;
if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
(void)deflateEnd(&strm);
return Z_ERRNO;
}
} while (strm.avail_out == 0);
assert(strm.avail_in == 0); /* all input will be used */
/* done when last data in file processed */
} while (flush != Z_FINISH);
assert(ret == Z_STREAM_END); /* stream will be complete */
/* clean up and return */
(void)deflateEnd(&strm);
return Z_OK;
}
Get-Content <input file> | ./zpipe -d > <output file>，它会报告“zpipe：无效或不完整的deflate数据”（CMD的“>”和“<”则可以正常工作）。 - broderick