-- see zlib.h -- */
| 308 | |
| 309 | /* -- see zlib.h -- */ |
| 310 | int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va) |
| 311 | { |
| 312 | int size, len; |
| 313 | gz_statep state; |
| 314 | z_streamp strm; |
| 315 | |
| 316 | /* get internal structure */ |
| 317 | if (file == NULL) |
| 318 | return -1; |
| 319 | state = (gz_statep)file; |
| 320 | strm = &(state->strm); |
| 321 | |
| 322 | /* check that we're writing and that there's no error */ |
| 323 | if (state->mode != GZ_WRITE || state->err != Z_OK) |
| 324 | return 0; |
| 325 | |
| 326 | /* make sure we have some buffer space */ |
| 327 | if (state->size == 0 && gz_init(state) == -1) |
| 328 | return 0; |
| 329 | |
| 330 | /* check for seek request */ |
| 331 | if (state->seek) { |
| 332 | state->seek = 0; |
| 333 | if (gz_zero(state, state->skip) == -1) |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | /* consume whatever's left in the input buffer */ |
| 338 | if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1) |
| 339 | return 0; |
| 340 | |
| 341 | /* do the printf() into the input buffer, put length in len */ |
| 342 | size = (int)(state->size); |
| 343 | state->in[size - 1] = 0; |
| 344 | #ifdef NO_vsnprintf |
| 345 | # ifdef HAS_vsprintf_void |
| 346 | (void)vsprintf((char *)(state->in), format, va); |
| 347 | for (len = 0; len < size; len++) |
| 348 | if (state->in[len] == 0) break; |
| 349 | # else |
| 350 | len = vsprintf((char *)(state->in), format, va); |
| 351 | # endif |
| 352 | #else |
| 353 | # ifdef HAS_vsnprintf_void |
| 354 | (void)vsnprintf((char *)(state->in), size, format, va); |
| 355 | len = strlen((char *)(state->in)); |
| 356 | # else |
| 357 | len = vsnprintf((char *)(state->in), size, format, va); |
| 358 | # endif |
| 359 | #endif |
| 360 | |
| 361 | /* check that printf() results fit in buffer */ |
| 362 | if (len <= 0 || len >= (int)size || state->in[size - 1] != 0) |
| 363 | return 0; |
| 364 | |
| 365 | /* update buffer and position, defer compression until needed */ |
| 366 | strm->avail_in = (unsigned)len; |
| 367 | strm->next_in = state->in; |