Function gz_open

freebsd/contrib/zstd/zlibWrapper/examples/minigzip.c:201–237

(path, fd, mode)

}

gzFile gz_open(path, fd, mode)
    const char *path;
    int fd;
    const char *mode;
{
    gzFile gz;
    int ret;

    gz = malloc(sizeof(struct gzFile_s));
    if (gz == NULL)
        return NULL;
    gz->write = strchr(mode, 'w') != NULL;
    gz->strm.zalloc = myalloc;
    gz->strm.zfree = myfree;
    gz->strm.opaque = Z_NULL;
    if (gz->write)
        ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0);
    else {
        gz->strm.next_in = 0;
        gz->strm.avail_in = Z_NULL;
        ret = inflateInit2(&(gz->strm), 15 + 16);
    }
    if (ret != Z_OK) {
        free(gz);
        return NULL;
    }
    gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") :
                              fopen(path, gz->write ? "wb" : "rb");
    if (gz->file == NULL) {
        gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm));
        free(gz);
        return NULL;
    }
    gz->err = 0;
    gz->msg = "";
    return gz;
}

int gzwrite OF((gzFile, const void *, unsigned));