| 263 | int gzread OF((gzFile, void *, unsigned)); |
| 264 | |
| 265 | int gzread(gz, buf, len) |
| 266 | gzFile gz; |
| 267 | void *buf; |
| 268 | unsigned len; |
| 269 | { |
| 270 | int ret; |
| 271 | unsigned got; |
| 272 | unsigned char in[1]; |
| 273 | z_stream *strm; |
| 274 | |
| 275 | if (gz == NULL || gz->write) |
| 276 | return 0; |
| 277 | if (gz->err) |
| 278 | return 0; |
| 279 | strm = &(gz->strm); |
| 280 | strm->next_out = (void *)buf; |
| 281 | strm->avail_out = len; |
| 282 | do { |
| 283 | got = fread(in, 1, 1, gz->file); |
| 284 | if (got == 0) |
| 285 | break; |
| 286 | strm->next_in = in; |
| 287 | strm->avail_in = 1; |
| 288 | ret = inflate(strm, Z_NO_FLUSH); |
| 289 | if (ret == Z_DATA_ERROR) { |
| 290 | gz->err = Z_DATA_ERROR; |
| 291 | gz->msg = strm->msg; |
| 292 | return 0; |
| 293 | } |
| 294 | if (ret == Z_STREAM_END) |
| 295 | inflateReset(strm); |
| 296 | } while (strm->avail_out); |
| 297 | return len - strm->avail_out; |
| 298 | } |
| 299 | |
| 300 | int gzclose OF((gzFile)); |
| 301 | |