diff options
| -rw-r--r-- | archival/bz/bzlib.c | 8 | ||||
| -rw-r--r-- | archival/bzip2.c | 94 |
2 files changed, 38 insertions, 64 deletions
diff --git a/archival/bz/bzlib.c b/archival/bz/bzlib.c index cdb596c..9957c2f 100644 --- a/archival/bz/bzlib.c +++ b/archival/bz/bzlib.c @@ -76,11 +76,9 @@ void init_RL(EState* s) static -Bool isempty_RL(EState* s) +int isempty_RL(EState* s) { - if (s->state_in_ch < 256 && s->state_in_len > 0) - return False; - return True; + return (s->state_in_ch >= 256 || s->state_in_len <= 0); } @@ -333,7 +331,7 @@ int BZ2_bzCompress(bz_stream *strm, int action) } #ifdef FLUSH_IS_UNUSED -case_BZ_M_FLUSHING: + case_BZ_M_FLUSHING: case BZ_M_FLUSHING: /*if (s->avail_in_expect != s->strm->avail_in) return BZ_SEQUENCE_ERROR;*/ diff --git a/archival/bzip2.c b/archival/bzip2.c index 67df144..7696336 100644 --- a/archival/bzip2.c +++ b/archival/bzip2.c @@ -51,79 +51,55 @@ enum { IOBUF_SIZE = 8 * 1024 }; +static uint8_t level; + +/* NB: compressStream() has to return -1 on errors, not die. + * bbunpack() will correctly clean up in this case + * (delete incomplete .bz2 file) + */ + /* Returns: - * <0 on write errors (examine errno), - * >0 on short writes (errno == 0) - * 0 no error (entire input consumed, gimme more) - * on "impossible" errors (internal bzip2 compressor bug) dies + * -1 on errors + * total written bytes so far otherwise */ static -ssize_t bz_write(bz_stream *strm, void* rbuf, ssize_t rlen, void *wbuf) +USE_DESKTOP(long long) int bz_write(bz_stream *strm, void* rbuf, ssize_t rlen, void *wbuf) { int n, n2, ret; strm->avail_in = rlen; - strm->next_in = rbuf; + strm->next_in = rbuf; while (1) { strm->avail_out = IOBUF_SIZE; strm->next_out = wbuf; - ret = BZ2_bzCompress(strm, BZ_RUN); - if (ret != BZ_RUN_OK) + ret = BZ2_bzCompress(strm, rlen ? BZ_RUN : BZ_FINISH); + if (ret != BZ_RUN_OK /* BZ_RUNning */ + && ret != BZ_FINISH_OK /* BZ_FINISHing, but not done yet */ + && ret != BZ_STREAM_END /* BZ_FINISHed */ + ) { bb_error_msg_and_die("internal error %d", ret); - - n = IOBUF_SIZE - strm->avail_out; - if (n) { - /* short reads must have errno == 0 */ - errno = 0; - n2 = full_write(STDOUT_FILENO, wbuf, n); - if (n2 != n) - return n2 ? n2 : 1; } - if (strm->avail_in == 0) - return 0; - } -} - - -/*---------------------------------------------------*/ -static -USE_DESKTOP(long long) int bz_write_tail(bz_stream *strm, void *wbuf) -{ - int n, n2, ret; - USE_DESKTOP(long long) int total; - - total = -1; - while (1) { - strm->avail_out = IOBUF_SIZE; - strm->next_out = wbuf; - - ret = BZ2_bzCompress(strm, BZ_FINISH); - if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END) - bb_error_msg_and_die("internal error %d", ret); - n = IOBUF_SIZE - strm->avail_out; if (n) { n2 = full_write(STDOUT_FILENO, wbuf, n); - if (n2 != n) - goto err; + if (n2 != n) { + if (n2 >= 0) + errno = 0; /* prevent bogus error message */ + bb_perror_msg(n2 >= 0 ? "short write" : "write error"); + return -1; + } } if (ret == BZ_STREAM_END) break; + if (rlen && strm->avail_in == 0) + break; } - - total = 0 USE_DESKTOP( + strm->total_out ); - err: -#if ENABLE_FEATURE_CLEAN_UP - BZ2_bzCompressEnd(strm); -#endif - return total; + return 0 USE_DESKTOP( + strm->total_out ); } -static uint8_t level; - static USE_DESKTOP(long long) int compressStream(void) { @@ -136,26 +112,26 @@ USE_DESKTOP(long long) int compressStream(void) #define wbuf (iobuf + IOBUF_SIZE) iobuf = xmalloc(2 * IOBUF_SIZE); - BZ2_bzCompressInit(strm, level); while (1) { count = full_read(STDIN_FILENO, rbuf, IOBUF_SIZE); - if (count < 0) + if (count < 0) { bb_perror_msg("read error"); - if (count <= 0) - break; - count = bz_write(strm, rbuf, count, wbuf); - if (count) { - bb_perror_msg(count < 0 ? "write error" : "short write"); + total = -1; break; } + /* if count == 0, bz_write finalizes compression */ + total = bz_write(strm, rbuf, count, wbuf); + if (count == 0 || total < 0) + break; } - total = bz_write_tail(strm, wbuf); +#if ENABLE_FEATURE_CLEAN_UP + BZ2_bzCompressEnd(strm); free(iobuf); - /* we had no error _only_ if count == 0 */ - return count == 0 ? total : -1; +#endif + return total; } static |