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NetBSD/dist/bzip2/bzlib.c

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merge conflicts
2008-03-18 17:47:07 +03:00
/* $NetBSD: bzlib.c,v 1.4 2008/03/18 14:47:07 christos Exp $ */
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
/*-------------------------------------------------------------*/
/*--- Library top-level functions. ---*/
/*--- bzlib.c ---*/
/*-------------------------------------------------------------*/
merge conflicts
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/* ------------------------------------------------------------------
This file is part of bzip2/libbzip2, a program and library for
lossless, block-sorting data compression.
Import bzip2 1.0.1
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merge conflicts
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bzip2/libbzip2 version 1.0.5 of 10 December 2007
Copyright (C) 1996-2007 Julian Seward <jseward@bzip.org>
Import bzip2 1.0.1
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merge conflicts
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Please read the WARNING, DISCLAIMER and PATENTS sections in the
README file.
Import bzip2 1.0.1
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merge conflicts
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This program is released under the terms of the license contained
in the file LICENSE.
------------------------------------------------------------------ */
/* CHANGES
0.9.0 -- original version.
0.9.0a/b -- no changes in this file.
0.9.0c -- made zero-length BZ_FLUSH work correctly in bzCompress().
fixed bzWrite/bzRead to ignore zero-length requests.
fixed bzread to correctly handle read requests after EOF.
wrong parameter order in call to bzDecompressInit in
bzBuffToBuffDecompress. Fixed.
*/
Import bzip2 1.0.1
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#include "bzlib_private.h"
/*---------------------------------------------------*/
/*--- Compression stuff ---*/
/*---------------------------------------------------*/
/*---------------------------------------------------*/
#ifndef BZ_NO_STDIO
void BZ2_bz__AssertH__fail ( int errcode )
{
fprintf(stderr,
"\n\nbzip2/libbzip2: internal error number %d.\n"
"This is a bug in bzip2/libbzip2, %s.\n"
merge conflicts
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"Please report it to me at: jseward@bzip.org. If this happened\n"
Import bzip2 1.0.1
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"when you were using some program which uses libbzip2 as a\n"
"component, you should also report this bug to the author(s)\n"
"of that program. Please make an effort to report this bug;\n"
"timely and accurate bug reports eventually lead to higher\n"
merge conflicts
2008-03-18 17:47:07 +03:00
"quality software. Thanks. Julian Seward, 10 December 2007.\n\n",
Import bzip2 1.0.1
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errcode,
BZ2_bzlibVersion()
);
Import bzip2 1.0.2
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if (errcode == 1007) {
fprintf(stderr,
"\n*** A special note about internal error number 1007 ***\n"
"\n"
"Experience suggests that a common cause of i.e. 1007\n"
"is unreliable memory or other hardware. The 1007 assertion\n"
"just happens to cross-check the results of huge numbers of\n"
"memory reads/writes, and so acts (unintendedly) as a stress\n"
"test of your memory system.\n"
"\n"
"I suggest the following: try compressing the file again,\n"
"possibly monitoring progress in detail with the -vv flag.\n"
"\n"
"* If the error cannot be reproduced, and/or happens at different\n"
" points in compression, you may have a flaky memory system.\n"
" Try a memory-test program. I have used Memtest86\n"
" (www.memtest86.com). At the time of writing it is free (GPLd).\n"
" Memtest86 tests memory much more thorougly than your BIOSs\n"
" power-on test, and may find failures that the BIOS doesn't.\n"
"\n"
"* If the error can be repeatably reproduced, this is a bug in\n"
" bzip2, and I would very much like to hear about it. Please\n"
" let me know, and, ideally, save a copy of the file causing the\n"
" problem -- without which I will be unable to investigate it.\n"
"\n"
);
}
Import bzip2 1.0.1
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exit(3);
}
#endif
/*---------------------------------------------------*/
static
int bz_config_ok ( void )
{
if (sizeof(int) != 4) return 0;
if (sizeof(short) != 2) return 0;
if (sizeof(char) != 1) return 0;
return 1;
}
/*---------------------------------------------------*/
static
void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
{
void* v = malloc ( items * size );
return v;
}
static
void default_bzfree ( void* opaque, void* addr )
{
if (addr != NULL) free ( addr );
}
/*---------------------------------------------------*/
static
void prepare_new_block ( EState* s )
{
Int32 i;
s->nblock = 0;
s->numZ = 0;
s->state_out_pos = 0;
BZ_INITIALISE_CRC ( s->blockCRC );
for (i = 0; i < 256; i++) s->inUse[i] = False;
s->blockNo++;
}
/*---------------------------------------------------*/
static
void init_RL ( EState* s )
{
s->state_in_ch = 256;
s->state_in_len = 0;
}
static
Bool isempty_RL ( EState* s )
{
if (s->state_in_ch < 256 && s->state_in_len > 0)
return False; else
return True;
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompressInit)
( bz_stream* strm,
int blockSize100k,
int verbosity,
int workFactor )
{
Int32 n;
EState* s;
if (!bz_config_ok()) return BZ_CONFIG_ERROR;
if (strm == NULL ||
blockSize100k < 1 || blockSize100k > 9 ||
workFactor < 0 || workFactor > 250)
return BZ_PARAM_ERROR;
if (workFactor == 0) workFactor = 30;
if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
s = BZALLOC( sizeof(EState) );
if (s == NULL) return BZ_MEM_ERROR;
s->strm = strm;
s->arr1 = NULL;
s->arr2 = NULL;
s->ftab = NULL;
n = 100000 * blockSize100k;
s->arr1 = BZALLOC( n * sizeof(UInt32) );
s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
s->ftab = BZALLOC( 65537 * sizeof(UInt32) );
if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) {
if (s->arr1 != NULL) BZFREE(s->arr1);
if (s->arr2 != NULL) BZFREE(s->arr2);
if (s->ftab != NULL) BZFREE(s->ftab);
if (s != NULL) BZFREE(s);
return BZ_MEM_ERROR;
}
s->blockNo = 0;
s->state = BZ_S_INPUT;
s->mode = BZ_M_RUNNING;
s->combinedCRC = 0;
s->blockSize100k = blockSize100k;
s->nblockMAX = 100000 * blockSize100k - 19;
s->verbosity = verbosity;
s->workFactor = workFactor;
s->block = (UChar*)s->arr2;
s->mtfv = (UInt16*)s->arr1;
s->zbits = NULL;
s->ptr = (UInt32*)s->arr1;
strm->state = s;
strm->total_in_lo32 = 0;
strm->total_in_hi32 = 0;
strm->total_out_lo32 = 0;
strm->total_out_hi32 = 0;
init_RL ( s );
prepare_new_block ( s );
return BZ_OK;
}
/*---------------------------------------------------*/
static
void add_pair_to_block ( EState* s )
{
Int32 i;
UChar ch = (UChar)(s->state_in_ch);
for (i = 0; i < s->state_in_len; i++) {
BZ_UPDATE_CRC( s->blockCRC, ch );
}
s->inUse[s->state_in_ch] = True;
switch (s->state_in_len) {
case 1:
s->block[s->nblock] = (UChar)ch; s->nblock++;
break;
case 2:
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
break;
case 3:
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
break;
default:
s->inUse[s->state_in_len-4] = True;
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = (UChar)ch; s->nblock++;
s->block[s->nblock] = ((UChar)(s->state_in_len-4));
s->nblock++;
break;
}
}
/*---------------------------------------------------*/
static
void flush_RL ( EState* s )
{
if (s->state_in_ch < 256) add_pair_to_block ( s );
init_RL ( s );
}
/*---------------------------------------------------*/
#define ADD_CHAR_TO_BLOCK(zs,zchh0) \
{ \
UInt32 zchh = (UInt32)(zchh0); \
/*-- fast track the common case --*/ \
if (zchh != zs->state_in_ch && \
zs->state_in_len == 1) { \
UChar ch = (UChar)(zs->state_in_ch); \
BZ_UPDATE_CRC( zs->blockCRC, ch ); \
zs->inUse[zs->state_in_ch] = True; \
zs->block[zs->nblock] = (UChar)ch; \
zs->nblock++; \
zs->state_in_ch = zchh; \
} \
else \
/*-- general, uncommon cases --*/ \
if (zchh != zs->state_in_ch || \
zs->state_in_len == 255) { \
if (zs->state_in_ch < 256) \
add_pair_to_block ( zs ); \
zs->state_in_ch = zchh; \
zs->state_in_len = 1; \
} else { \
zs->state_in_len++; \
} \
}
/*---------------------------------------------------*/
static
Bool copy_input_until_stop ( EState* s )
{
Bool progress_in = False;
if (s->mode == BZ_M_RUNNING) {
/*-- fast track the common case --*/
while (True) {
/*-- block full? --*/
if (s->nblock >= s->nblockMAX) break;
/*-- no input? --*/
if (s->strm->avail_in == 0) break;
progress_in = True;
ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
s->strm->next_in++;
s->strm->avail_in--;
s->strm->total_in_lo32++;
if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
}
} else {
/*-- general, uncommon case --*/
while (True) {
/*-- block full? --*/
if (s->nblock >= s->nblockMAX) break;
/*-- no input? --*/
if (s->strm->avail_in == 0) break;
/*-- flush/finish end? --*/
if (s->avail_in_expect == 0) break;
progress_in = True;
ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
s->strm->next_in++;
s->strm->avail_in--;
s->strm->total_in_lo32++;
if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
s->avail_in_expect--;
}
}
return progress_in;
}
/*---------------------------------------------------*/
static
Bool copy_output_until_stop ( EState* s )
{
Bool progress_out = False;
while (True) {
/*-- no output space? --*/
if (s->strm->avail_out == 0) break;
/*-- block done? --*/
if (s->state_out_pos >= s->numZ) break;
progress_out = True;
*(s->strm->next_out) = s->zbits[s->state_out_pos];
s->state_out_pos++;
s->strm->avail_out--;
s->strm->next_out++;
s->strm->total_out_lo32++;
if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
}
return progress_out;
}
/*---------------------------------------------------*/
static
Bool handle_compress ( bz_stream* strm )
{
Bool progress_in = False;
Bool progress_out = False;
EState* s = strm->state;
while (True) {
if (s->state == BZ_S_OUTPUT) {
progress_out |= copy_output_until_stop ( s );
if (s->state_out_pos < s->numZ) break;
if (s->mode == BZ_M_FINISHING &&
s->avail_in_expect == 0 &&
isempty_RL(s)) break;
prepare_new_block ( s );
s->state = BZ_S_INPUT;
if (s->mode == BZ_M_FLUSHING &&
s->avail_in_expect == 0 &&
isempty_RL(s)) break;
}
if (s->state == BZ_S_INPUT) {
progress_in |= copy_input_until_stop ( s );
if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) {
flush_RL ( s );
BZ2_compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) );
s->state = BZ_S_OUTPUT;
}
else
if (s->nblock >= s->nblockMAX) {
BZ2_compressBlock ( s, False );
s->state = BZ_S_OUTPUT;
}
else
if (s->strm->avail_in == 0) {
break;
}
}
}
return progress_in || progress_out;
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompress) ( bz_stream *strm, int action )
{
Bool progress;
EState* s;
if (strm == NULL) return BZ_PARAM_ERROR;
s = strm->state;
if (s == NULL) return BZ_PARAM_ERROR;
if (s->strm != strm) return BZ_PARAM_ERROR;
preswitch:
switch (s->mode) {
case BZ_M_IDLE:
return BZ_SEQUENCE_ERROR;
case BZ_M_RUNNING:
if (action == BZ_RUN) {
progress = handle_compress ( strm );
return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
}
else
if (action == BZ_FLUSH) {
s->avail_in_expect = strm->avail_in;
s->mode = BZ_M_FLUSHING;
goto preswitch;
}
else
if (action == BZ_FINISH) {
s->avail_in_expect = strm->avail_in;
s->mode = BZ_M_FINISHING;
goto preswitch;
}
else
return BZ_PARAM_ERROR;
case BZ_M_FLUSHING:
if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR;
if (s->avail_in_expect != s->strm->avail_in)
return BZ_SEQUENCE_ERROR;
progress = handle_compress ( strm );
if (s->avail_in_expect > 0 || !isempty_RL(s) ||
s->state_out_pos < s->numZ) return BZ_FLUSH_OK;
s->mode = BZ_M_RUNNING;
return BZ_RUN_OK;
case BZ_M_FINISHING:
if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR;
if (s->avail_in_expect != s->strm->avail_in)
return BZ_SEQUENCE_ERROR;
progress = handle_compress ( strm );
if (!progress) return BZ_SEQUENCE_ERROR;
if (s->avail_in_expect > 0 || !isempty_RL(s) ||
s->state_out_pos < s->numZ) return BZ_FINISH_OK;
s->mode = BZ_M_IDLE;
return BZ_STREAM_END;
}
return BZ_OK; /*--not reached--*/
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompressEnd) ( bz_stream *strm )
{
EState* s;
if (strm == NULL) return BZ_PARAM_ERROR;
s = strm->state;
if (s == NULL) return BZ_PARAM_ERROR;
if (s->strm != strm) return BZ_PARAM_ERROR;
if (s->arr1 != NULL) BZFREE(s->arr1);
if (s->arr2 != NULL) BZFREE(s->arr2);
if (s->ftab != NULL) BZFREE(s->ftab);
BZFREE(strm->state);
strm->state = NULL;
return BZ_OK;
}
/*---------------------------------------------------*/
/*--- Decompression stuff ---*/
/*---------------------------------------------------*/
/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompressInit)
( bz_stream* strm,
int verbosity,
int small )
{
DState* s;
if (!bz_config_ok()) return BZ_CONFIG_ERROR;
if (strm == NULL) return BZ_PARAM_ERROR;
if (small != 0 && small != 1) return BZ_PARAM_ERROR;
if (verbosity < 0 || verbosity > 4) return BZ_PARAM_ERROR;
if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
s = BZALLOC( sizeof(DState) );
if (s == NULL) return BZ_MEM_ERROR;
s->strm = strm;
strm->state = s;
s->state = BZ_X_MAGIC_1;
s->bsLive = 0;
s->bsBuff = 0;
s->calculatedCombinedCRC = 0;
strm->total_in_lo32 = 0;
strm->total_in_hi32 = 0;
strm->total_out_lo32 = 0;
strm->total_out_hi32 = 0;
s->smallDecompress = (Bool)small;
s->ll4 = NULL;
s->ll16 = NULL;
s->tt = NULL;
s->currBlockNo = 0;
s->verbosity = verbosity;
return BZ_OK;
}
/*---------------------------------------------------*/
merge conflicts
2008-03-18 17:47:07 +03:00
/* Return True iff data corruption is discovered.
Returns False if there is no problem.
*/
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
static
merge conflicts
2008-03-18 17:47:07 +03:00
Bool unRLE_obuf_to_output_FAST ( DState* s )
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
{
UChar k1;
if (s->blockRandomised) {
while (True) {
/* try to finish existing run */
while (True) {
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->strm->avail_out == 0) return False;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if (s->state_out_len == 0) break;
*( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
s->state_out_len--;
s->strm->next_out++;
s->strm->avail_out--;
s->strm->total_out_lo32++;
if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
}
merge conflicts
2008-03-18 17:47:07 +03:00
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
/* can a new run be started? */
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->nblock_used == s->save_nblock+1) return False;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
merge conflicts
2008-03-18 17:47:07 +03:00
/* Only caused by corrupt data stream? */
if (s->nblock_used > s->save_nblock+1)
return True;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
s->state_out_len = 1;
s->state_out_ch = s->k0;
BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 2;
BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 3;
BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
s->state_out_len = ((Int32)k1) + 4;
BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK;
s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
}
} else {
/* restore */
UInt32 c_calculatedBlockCRC = s->calculatedBlockCRC;
UChar c_state_out_ch = s->state_out_ch;
Int32 c_state_out_len = s->state_out_len;
Int32 c_nblock_used = s->nblock_used;
Int32 c_k0 = s->k0;
UInt32* c_tt = s->tt;
UInt32 c_tPos = s->tPos;
char* cs_next_out = s->strm->next_out;
unsigned int cs_avail_out = s->strm->avail_out;
merge conflicts
2008-03-18 17:47:07 +03:00
Int32 ro_blockSize100k = s->blockSize100k;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
/* end restore */
UInt32 avail_out_INIT = cs_avail_out;
Int32 s_save_nblockPP = s->save_nblock+1;
unsigned int total_out_lo32_old;
while (True) {
/* try to finish existing run */
if (c_state_out_len > 0) {
while (True) {
if (cs_avail_out == 0) goto return_notr;
if (c_state_out_len == 1) break;
*( (UChar*)(cs_next_out) ) = c_state_out_ch;
BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
c_state_out_len--;
cs_next_out++;
cs_avail_out--;
}
s_state_out_len_eq_one:
{
if (cs_avail_out == 0) {
c_state_out_len = 1; goto return_notr;
};
*( (UChar*)(cs_next_out) ) = c_state_out_ch;
BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
cs_next_out++;
cs_avail_out--;
}
}
merge conflicts
2008-03-18 17:47:07 +03:00
/* Only caused by corrupt data stream? */
if (c_nblock_used > s_save_nblockPP)
return True;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
/* can a new run be started? */
if (c_nblock_used == s_save_nblockPP) {
c_state_out_len = 0; goto return_notr;
};
c_state_out_ch = c_k0;
BZ_GET_FAST_C(k1); c_nblock_used++;
if (k1 != c_k0) {
c_k0 = k1; goto s_state_out_len_eq_one;
};
if (c_nblock_used == s_save_nblockPP)
goto s_state_out_len_eq_one;
c_state_out_len = 2;
BZ_GET_FAST_C(k1); c_nblock_used++;
if (c_nblock_used == s_save_nblockPP) continue;
if (k1 != c_k0) { c_k0 = k1; continue; };
c_state_out_len = 3;
BZ_GET_FAST_C(k1); c_nblock_used++;
if (c_nblock_used == s_save_nblockPP) continue;
if (k1 != c_k0) { c_k0 = k1; continue; };
BZ_GET_FAST_C(k1); c_nblock_used++;
c_state_out_len = ((Int32)k1) + 4;
BZ_GET_FAST_C(c_k0); c_nblock_used++;
}
return_notr:
total_out_lo32_old = s->strm->total_out_lo32;
s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out);
if (s->strm->total_out_lo32 < total_out_lo32_old)
s->strm->total_out_hi32++;
/* save */
s->calculatedBlockCRC = c_calculatedBlockCRC;
s->state_out_ch = c_state_out_ch;
s->state_out_len = c_state_out_len;
s->nblock_used = c_nblock_used;
s->k0 = c_k0;
s->tt = c_tt;
s->tPos = c_tPos;
s->strm->next_out = cs_next_out;
s->strm->avail_out = cs_avail_out;
/* end save */
}
merge conflicts
2008-03-18 17:47:07 +03:00
return False;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
}
/*---------------------------------------------------*/
__inline__ Int32 BZ2_indexIntoF ( Int32 indx, Int32 *cftab )
{
Int32 nb, na, mid;
nb = 0;
na = 256;
do {
mid = (nb + na) >> 1;
if (indx >= cftab[mid]) nb = mid; else na = mid;
}
while (na - nb != 1);
return nb;
}
/*---------------------------------------------------*/
merge conflicts
2008-03-18 17:47:07 +03:00
/* Return True iff data corruption is discovered.
Returns False if there is no problem.
*/
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
static
merge conflicts
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Bool unRLE_obuf_to_output_SMALL ( DState* s )
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
{
UChar k1;
if (s->blockRandomised) {
while (True) {
/* try to finish existing run */
while (True) {
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->strm->avail_out == 0) return False;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if (s->state_out_len == 0) break;
*( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
s->state_out_len--;
s->strm->next_out++;
s->strm->avail_out--;
s->strm->total_out_lo32++;
if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
}
/* can a new run be started? */
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->nblock_used == s->save_nblock+1) return False;
/* Only caused by corrupt data stream? */
if (s->nblock_used > s->save_nblock+1)
return True;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
s->state_out_len = 1;
s->state_out_ch = s->k0;
BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 2;
BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 3;
BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
k1 ^= BZ_RAND_MASK; s->nblock_used++;
s->state_out_len = ((Int32)k1) + 4;
BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK;
s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
}
} else {
while (True) {
/* try to finish existing run */
while (True) {
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->strm->avail_out == 0) return False;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if (s->state_out_len == 0) break;
*( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
s->state_out_len--;
s->strm->next_out++;
s->strm->avail_out--;
s->strm->total_out_lo32++;
if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
}
/* can a new run be started? */
merge conflicts
2008-03-18 17:47:07 +03:00
if (s->nblock_used == s->save_nblock+1) return False;
/* Only caused by corrupt data stream? */
if (s->nblock_used > s->save_nblock+1)
return True;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
s->state_out_len = 1;
s->state_out_ch = s->k0;
BZ_GET_SMALL(k1); s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 2;
BZ_GET_SMALL(k1); s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
s->state_out_len = 3;
BZ_GET_SMALL(k1); s->nblock_used++;
if (s->nblock_used == s->save_nblock+1) continue;
if (k1 != s->k0) { s->k0 = k1; continue; };
BZ_GET_SMALL(k1); s->nblock_used++;
s->state_out_len = ((Int32)k1) + 4;
BZ_GET_SMALL(s->k0); s->nblock_used++;
}
}
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompress) ( bz_stream *strm )
{
merge conflicts
2008-03-18 17:47:07 +03:00
Bool corrupt;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
DState* s;
if (strm == NULL) return BZ_PARAM_ERROR;
s = strm->state;
if (s == NULL) return BZ_PARAM_ERROR;
if (s->strm != strm) return BZ_PARAM_ERROR;
while (True) {
if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR;
if (s->state == BZ_X_OUTPUT) {
if (s->smallDecompress)
merge conflicts
2008-03-18 17:47:07 +03:00
corrupt = unRLE_obuf_to_output_SMALL ( s ); else
corrupt = unRLE_obuf_to_output_FAST ( s );
if (corrupt) return BZ_DATA_ERROR;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) {
BZ_FINALISE_CRC ( s->calculatedBlockCRC );
if (s->verbosity >= 3)
merge conflicts
2008-03-18 17:47:07 +03:00
VPrintf2 ( " {0x%08x, 0x%08x}", s->storedBlockCRC,
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
s->calculatedBlockCRC );
if (s->verbosity >= 2) VPrintf0 ( "]" );
if (s->calculatedBlockCRC != s->storedBlockCRC)
return BZ_DATA_ERROR;
s->calculatedCombinedCRC
= (s->calculatedCombinedCRC << 1) |
(s->calculatedCombinedCRC >> 31);
s->calculatedCombinedCRC ^= s->calculatedBlockCRC;
s->state = BZ_X_BLKHDR_1;
} else {
return BZ_OK;
}
}
if (s->state >= BZ_X_MAGIC_1) {
Int32 r = BZ2_decompress ( s );
if (r == BZ_STREAM_END) {
if (s->verbosity >= 3)
merge conflicts
2008-03-18 17:47:07 +03:00
VPrintf2 ( "\n combined CRCs: stored = 0x%08x, computed = 0x%08x",
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
s->storedCombinedCRC, s->calculatedCombinedCRC );
if (s->calculatedCombinedCRC != s->storedCombinedCRC)
return BZ_DATA_ERROR;
return r;
}
if (s->state != BZ_X_OUTPUT) return r;
}
}
AssertH ( 0, 6001 );
return 0; /*NOTREACHED*/
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompressEnd) ( bz_stream *strm )
{
DState* s;
if (strm == NULL) return BZ_PARAM_ERROR;
s = strm->state;
if (s == NULL) return BZ_PARAM_ERROR;
if (s->strm != strm) return BZ_PARAM_ERROR;
if (s->tt != NULL) BZFREE(s->tt);
if (s->ll16 != NULL) BZFREE(s->ll16);
if (s->ll4 != NULL) BZFREE(s->ll4);
BZFREE(strm->state);
strm->state = NULL;
return BZ_OK;
}
#ifndef BZ_NO_STDIO
/*---------------------------------------------------*/
/*--- File I/O stuff ---*/
/*---------------------------------------------------*/
#define BZ_SETERR(eee) \
{ \
if (bzerror != NULL) *bzerror = eee; \
if (bzf != NULL) bzf->lastErr = eee; \
}
typedef
struct {
FILE* handle;
Char buf[BZ_MAX_UNUSED];
Int32 bufN;
Bool writing;
bz_stream strm;
Int32 lastErr;
Bool initialisedOk;
}
bzFile;
/*---------------------------------------------*/
static Bool myfeof ( FILE* f )
{
Int32 c = fgetc ( f );
if (c == EOF) return True;
ungetc ( c, f );
return False;
}
/*---------------------------------------------------*/
BZFILE* BZ_API(BZ2_bzWriteOpen)
( int* bzerror,
FILE* f,
int blockSize100k,
int verbosity,
int workFactor )
{
Int32 ret;
bzFile* bzf = NULL;
BZ_SETERR(BZ_OK);
if (f == NULL ||
(blockSize100k < 1 || blockSize100k > 9) ||
(workFactor < 0 || workFactor > 250) ||
(verbosity < 0 || verbosity > 4))
{ BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
if (ferror(f))
{ BZ_SETERR(BZ_IO_ERROR); return NULL; };
bzf = malloc ( sizeof(bzFile) );
if (bzf == NULL)
{ BZ_SETERR(BZ_MEM_ERROR); return NULL; };
BZ_SETERR(BZ_OK);
bzf->initialisedOk = False;
bzf->bufN = 0;
bzf->handle = f;
bzf->writing = True;
bzf->strm.bzalloc = NULL;
bzf->strm.bzfree = NULL;
bzf->strm.opaque = NULL;
if (workFactor == 0) workFactor = 30;
ret = BZ2_bzCompressInit ( &(bzf->strm), blockSize100k,
verbosity, workFactor );
if (ret != BZ_OK)
{ BZ_SETERR(ret); free(bzf); return NULL; };
bzf->strm.avail_in = 0;
bzf->initialisedOk = True;
return bzf;
}
/*---------------------------------------------------*/
void BZ_API(BZ2_bzWrite)
( int* bzerror,
BZFILE* b,
void* buf,
int len )
{
Int32 n, n2, ret;
bzFile* bzf = (bzFile*)b;
BZ_SETERR(BZ_OK);
if (bzf == NULL || buf == NULL || len < 0)
{ BZ_SETERR(BZ_PARAM_ERROR); return; };
if (!(bzf->writing))
{ BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
if (ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return; };
if (len == 0)
{ BZ_SETERR(BZ_OK); return; };
bzf->strm.avail_in = len;
bzf->strm.next_in = buf;
while (True) {
bzf->strm.avail_out = BZ_MAX_UNUSED;
bzf->strm.next_out = bzf->buf;
ret = BZ2_bzCompress ( &(bzf->strm), BZ_RUN );
if (ret != BZ_RUN_OK)
{ BZ_SETERR(ret); return; };
if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
n = BZ_MAX_UNUSED - bzf->strm.avail_out;
n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
n, bzf->handle );
if (n != n2 || ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return; };
}
if (bzf->strm.avail_in == 0)
{ BZ_SETERR(BZ_OK); return; };
}
}
/*---------------------------------------------------*/
void BZ_API(BZ2_bzWriteClose)
( int* bzerror,
BZFILE* b,
int abandon,
unsigned int* nbytes_in,
unsigned int* nbytes_out )
{
BZ2_bzWriteClose64 ( bzerror, b, abandon,
nbytes_in, NULL, nbytes_out, NULL );
}
void BZ_API(BZ2_bzWriteClose64)
( int* bzerror,
BZFILE* b,
int abandon,
unsigned int* nbytes_in_lo32,
unsigned int* nbytes_in_hi32,
unsigned int* nbytes_out_lo32,
unsigned int* nbytes_out_hi32 )
{
Int32 n, n2, ret;
bzFile* bzf = (bzFile*)b;
if (bzf == NULL)
{ BZ_SETERR(BZ_OK); return; };
if (!(bzf->writing))
{ BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
if (ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return; };
if (nbytes_in_lo32 != NULL) *nbytes_in_lo32 = 0;
if (nbytes_in_hi32 != NULL) *nbytes_in_hi32 = 0;
if (nbytes_out_lo32 != NULL) *nbytes_out_lo32 = 0;
if (nbytes_out_hi32 != NULL) *nbytes_out_hi32 = 0;
if ((!abandon) && bzf->lastErr == BZ_OK) {
while (True) {
bzf->strm.avail_out = BZ_MAX_UNUSED;
bzf->strm.next_out = bzf->buf;
ret = BZ2_bzCompress ( &(bzf->strm), BZ_FINISH );
if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END)
{ BZ_SETERR(ret); return; };
if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
n = BZ_MAX_UNUSED - bzf->strm.avail_out;
n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
n, bzf->handle );
if (n != n2 || ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return; };
}
if (ret == BZ_STREAM_END) break;
}
}
if ( !abandon && !ferror ( bzf->handle ) ) {
fflush ( bzf->handle );
if (ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return; };
}
if (nbytes_in_lo32 != NULL)
*nbytes_in_lo32 = bzf->strm.total_in_lo32;
if (nbytes_in_hi32 != NULL)
*nbytes_in_hi32 = bzf->strm.total_in_hi32;
if (nbytes_out_lo32 != NULL)
*nbytes_out_lo32 = bzf->strm.total_out_lo32;
if (nbytes_out_hi32 != NULL)
*nbytes_out_hi32 = bzf->strm.total_out_hi32;
BZ_SETERR(BZ_OK);
BZ2_bzCompressEnd ( &(bzf->strm) );
free ( bzf );
}
/*---------------------------------------------------*/
BZFILE* BZ_API(BZ2_bzReadOpen)
( int* bzerror,
FILE* f,
int verbosity,
int small,
void* unused,
int nUnused )
{
bzFile* bzf = NULL;
int ret;
BZ_SETERR(BZ_OK);
if (f == NULL ||
(small != 0 && small != 1) ||
(verbosity < 0 || verbosity > 4) ||
(unused == NULL && nUnused != 0) ||
(unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED)))
{ BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
if (ferror(f))
{ BZ_SETERR(BZ_IO_ERROR); return NULL; };
bzf = malloc ( sizeof(bzFile) );
if (bzf == NULL)
{ BZ_SETERR(BZ_MEM_ERROR); return NULL; };
BZ_SETERR(BZ_OK);
bzf->initialisedOk = False;
bzf->handle = f;
bzf->bufN = 0;
bzf->writing = False;
bzf->strm.bzalloc = NULL;
bzf->strm.bzfree = NULL;
bzf->strm.opaque = NULL;
while (nUnused > 0) {
bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++;
unused = ((void*)( 1 + ((UChar*)(unused)) ));
nUnused--;
}
ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small );
if (ret != BZ_OK)
{ BZ_SETERR(ret); free(bzf); return NULL; };
bzf->strm.avail_in = bzf->bufN;
bzf->strm.next_in = bzf->buf;
bzf->initialisedOk = True;
return bzf;
}
/*---------------------------------------------------*/
void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b )
{
bzFile* bzf = (bzFile*)b;
BZ_SETERR(BZ_OK);
if (bzf == NULL)
{ BZ_SETERR(BZ_OK); return; };
if (bzf->writing)
{ BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
if (bzf->initialisedOk)
(void)BZ2_bzDecompressEnd ( &(bzf->strm) );
free ( bzf );
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzRead)
( int* bzerror,
BZFILE* b,
void* buf,
int len )
{
Int32 n, ret;
bzFile* bzf = (bzFile*)b;
BZ_SETERR(BZ_OK);
if (bzf == NULL || buf == NULL || len < 0)
{ BZ_SETERR(BZ_PARAM_ERROR); return 0; };
if (bzf->writing)
{ BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; };
if (len == 0)
{ BZ_SETERR(BZ_OK); return 0; };
bzf->strm.avail_out = len;
bzf->strm.next_out = buf;
while (True) {
if (ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return 0; };
if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) {
n = fread ( bzf->buf, sizeof(UChar),
BZ_MAX_UNUSED, bzf->handle );
if (ferror(bzf->handle))
{ BZ_SETERR(BZ_IO_ERROR); return 0; };
bzf->bufN = n;
bzf->strm.avail_in = bzf->bufN;
bzf->strm.next_in = bzf->buf;
}
ret = BZ2_bzDecompress ( &(bzf->strm) );
if (ret != BZ_OK && ret != BZ_STREAM_END)
{ BZ_SETERR(ret); return 0; };
if (ret == BZ_OK && myfeof(bzf->handle) &&
bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0)
{ BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; };
if (ret == BZ_STREAM_END)
{ BZ_SETERR(BZ_STREAM_END);
return len - bzf->strm.avail_out; };
if (bzf->strm.avail_out == 0)
{ BZ_SETERR(BZ_OK); return len; };
}
return 0; /*not reached*/
}
/*---------------------------------------------------*/
void BZ_API(BZ2_bzReadGetUnused)
( int* bzerror,
BZFILE* b,
void** unused,
int* nUnused )
{
bzFile* bzf = (bzFile*)b;
if (bzf == NULL)
{ BZ_SETERR(BZ_PARAM_ERROR); return; };
if (bzf->lastErr != BZ_STREAM_END)
{ BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
if (unused == NULL || nUnused == NULL)
{ BZ_SETERR(BZ_PARAM_ERROR); return; };
BZ_SETERR(BZ_OK);
*nUnused = bzf->strm.avail_in;
*unused = bzf->strm.next_in;
}
#endif
/*---------------------------------------------------*/
/*--- Misc convenience stuff ---*/
/*---------------------------------------------------*/
/*---------------------------------------------------*/
int BZ_API(BZ2_bzBuffToBuffCompress)
( char* dest,
unsigned int* destLen,
char* source,
unsigned int sourceLen,
int blockSize100k,
int verbosity,
int workFactor )
{
bz_stream strm;
int ret;
if (dest == NULL || destLen == NULL ||
source == NULL ||
blockSize100k < 1 || blockSize100k > 9 ||
verbosity < 0 || verbosity > 4 ||
workFactor < 0 || workFactor > 250)
return BZ_PARAM_ERROR;
if (workFactor == 0) workFactor = 30;
strm.bzalloc = NULL;
strm.bzfree = NULL;
strm.opaque = NULL;
ret = BZ2_bzCompressInit ( &strm, blockSize100k,
verbosity, workFactor );
if (ret != BZ_OK) return ret;
strm.next_in = source;
strm.next_out = dest;
strm.avail_in = sourceLen;
strm.avail_out = *destLen;
ret = BZ2_bzCompress ( &strm, BZ_FINISH );
if (ret == BZ_FINISH_OK) goto output_overflow;
if (ret != BZ_STREAM_END) goto errhandler;
/* normal termination */
*destLen -= strm.avail_out;
BZ2_bzCompressEnd ( &strm );
return BZ_OK;
output_overflow:
BZ2_bzCompressEnd ( &strm );
return BZ_OUTBUFF_FULL;
errhandler:
BZ2_bzCompressEnd ( &strm );
return ret;
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzBuffToBuffDecompress)
( char* dest,
unsigned int* destLen,
char* source,
unsigned int sourceLen,
int small,
int verbosity )
{
bz_stream strm;
int ret;
if (dest == NULL || destLen == NULL ||
source == NULL ||
(small != 0 && small != 1) ||
verbosity < 0 || verbosity > 4)
return BZ_PARAM_ERROR;
strm.bzalloc = NULL;
strm.bzfree = NULL;
strm.opaque = NULL;
ret = BZ2_bzDecompressInit ( &strm, verbosity, small );
if (ret != BZ_OK) return ret;
strm.next_in = source;
strm.next_out = dest;
strm.avail_in = sourceLen;
strm.avail_out = *destLen;
ret = BZ2_bzDecompress ( &strm );
if (ret == BZ_OK) goto output_overflow_or_eof;
if (ret != BZ_STREAM_END) goto errhandler;
/* normal termination */
*destLen -= strm.avail_out;
BZ2_bzDecompressEnd ( &strm );
return BZ_OK;
output_overflow_or_eof:
if (strm.avail_out > 0) {
BZ2_bzDecompressEnd ( &strm );
return BZ_UNEXPECTED_EOF;
} else {
BZ2_bzDecompressEnd ( &strm );
return BZ_OUTBUFF_FULL;
};
errhandler:
BZ2_bzDecompressEnd ( &strm );
return ret;
}
/*---------------------------------------------------*/
/*--
merge conflicts
2008-03-18 17:47:07 +03:00
Code contributed by Yoshioka Tsuneo (tsuneo@rr.iij4u.or.jp)
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
to support better zlib compatibility.
This code is not _officially_ part of libbzip2 (yet);
I haven't tested it, documented it, or considered the
threading-safeness of it.
If this code breaks, please contact both Yoshioka and me.
--*/
/*---------------------------------------------------*/
/*---------------------------------------------------*/
/*--
merge conflicts
2008-03-18 17:47:07 +03:00
return version like "0.9.5d, 4-Sept-1999".
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
--*/
const char * BZ_API(BZ2_bzlibVersion)(void)
{
return BZ_VERSION;
}
#ifndef BZ_NO_STDIO
/*---------------------------------------------------*/
#if defined(_WIN32) || defined(OS2) || defined(MSDOS)
# include <fcntl.h>
# include <io.h>
# define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY)
#else
# define SET_BINARY_MODE(file)
#endif
static
BZFILE * bzopen_or_bzdopen
( const char *path, /* no use when bzdopen */
int fd, /* no use when bzdopen */
const char *mode,
int open_mode) /* bzopen: 0, bzdopen:1 */
{
int bzerr;
char unused[BZ_MAX_UNUSED];
int blockSize100k = 9;
int writing = 0;
char mode2[10] = "";
FILE *fp = NULL;
BZFILE *bzfp = NULL;
int verbosity = 0;
int workFactor = 30;
int smallMode = 0;
int nUnused = 0;
if (mode == NULL) return NULL;
while (*mode) {
switch (*mode) {
case 'r':
writing = 0; break;
case 'w':
writing = 1; break;
case 's':
smallMode = 1; break;
default:
PR/21152: Christian Biere: ctype function misuse.
2005-04-17 21:37:11 +04:00
if (isdigit((unsigned char)(*mode))) {
Import bzip2 1.0.2
2002-03-15 04:35:17 +03:00
blockSize100k = *mode-BZ_HDR_0;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
}
}
mode++;
}
strcat(mode2, writing ? "w" : "r" );
strcat(mode2,"b"); /* binary mode */
if (open_mode==0) {
if (path==NULL || strcmp(path,"")==0) {
fp = (writing ? stdout : stdin);
SET_BINARY_MODE(fp);
} else {
fp = fopen(path,mode2);
}
} else {
#ifdef BZ_STRICT_ANSI
fp = NULL;
#else
fp = fdopen(fd,mode2);
#endif
}
if (fp == NULL) return NULL;
if (writing) {
/* Guard against total chaos and anarchy -- JRS */
if (blockSize100k < 1) blockSize100k = 1;
if (blockSize100k > 9) blockSize100k = 9;
bzfp = BZ2_bzWriteOpen(&bzerr,fp,blockSize100k,
verbosity,workFactor);
} else {
bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode,
unused,nUnused);
}
if (bzfp == NULL) {
if (fp != stdin && fp != stdout) fclose(fp);
return NULL;
}
return bzfp;
}
/*---------------------------------------------------*/
/*--
open file for read or write.
ex) bzopen("file","w9")
case path="" or NULL => use stdin or stdout.
--*/
BZFILE * BZ_API(BZ2_bzopen)
( const char *path,
const char *mode )
{
return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
}
/*---------------------------------------------------*/
BZFILE * BZ_API(BZ2_bzdopen)
( int fd,
const char *mode )
{
return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzread) (BZFILE* b, void* buf, int len )
{
int bzerr, nread;
if (((bzFile*)b)->lastErr == BZ_STREAM_END) return 0;
nread = BZ2_bzRead(&bzerr,b,buf,len);
if (bzerr == BZ_OK || bzerr == BZ_STREAM_END) {
return nread;
} else {
return -1;
}
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzwrite) (BZFILE* b, void* buf, int len )
{
int bzerr;
BZ2_bzWrite(&bzerr,b,buf,len);
if(bzerr == BZ_OK){
return len;
}else{
return -1;
}
}
/*---------------------------------------------------*/
int BZ_API(BZ2_bzflush) (BZFILE *b)
{
/* do nothing now... */
return 0;
}
/*---------------------------------------------------*/
void BZ_API(BZ2_bzclose) (BZFILE* b)
{
int bzerr;
Only dereference b after it has been NULL checked. Coverity CID 2398.
2006-03-17 05:52:56 +03:00
FILE *fp;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if (b==NULL) {return;}
Only dereference b after it has been NULL checked. Coverity CID 2398.
2006-03-17 05:52:56 +03:00
fp = ((bzFile *)b)->handle;
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
if(((bzFile*)b)->writing){
BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL);
if(bzerr != BZ_OK){
BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
}
}else{
BZ2_bzReadClose(&bzerr,b);
}
if(fp!=stdin && fp!=stdout){
fclose(fp);
}
}
/*---------------------------------------------------*/
/*--
return last error code
--*/
merge conflicts
2008-03-18 17:47:07 +03:00
static const char *bzerrorstrings[] = {
Import bzip2 1.0.1
2001-06-03 17:03:00 +04:00
"OK"
,"SEQUENCE_ERROR"
,"PARAM_ERROR"
,"MEM_ERROR"
,"DATA_ERROR"
,"DATA_ERROR_MAGIC"
,"IO_ERROR"
,"UNEXPECTED_EOF"
,"OUTBUFF_FULL"
,"CONFIG_ERROR"
,"???" /* for future */
,"???" /* for future */
,"???" /* for future */
,"???" /* for future */
,"???" /* for future */
,"???" /* for future */
};
const char * BZ_API(BZ2_bzerror) (BZFILE *b, int *errnum)
{
int err = ((bzFile *)b)->lastErr;
if(err>0) err = 0;
*errnum = err;
return bzerrorstrings[err*-1];
}
#endif
/*-------------------------------------------------------------*/
/*--- end bzlib.c ---*/
/*-------------------------------------------------------------*/