8 #include "util/debug.h"
11 #define CHUNK_SIZE 16384
13 int gzip_decompress_to_file(const char *input, int output_fd)
15 int ret = Z_STREAM_ERROR;
20 unsigned char buf[CHUNK_SIZE];
29 input_fd = open(input, O_RDONLY);
33 if (fstat(input_fd, &stbuf) < 0)
36 ptr = mmap(NULL, stbuf.st_size, PROT_READ, MAP_PRIVATE, input_fd, 0);
37 if (ptr == MAP_FAILED)
40 if (inflateInit2(&zs, 16 + MAX_WBITS) != Z_OK)
44 zs.avail_in = stbuf.st_size;
48 zs.avail_out = CHUNK_SIZE;
50 ret = inflate(&zs, Z_NO_FLUSH);
62 len = CHUNK_SIZE - zs.avail_out;
63 if (writen(output_fd, buf, len) != len) {
68 } while (ret != Z_STREAM_END);
73 munmap(ptr, stbuf.st_size);
77 return ret == Z_STREAM_END ? 0 : -1;