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Bzip2.xs
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Bzip2.xs
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/* Bzip2.xs -- Bzip2 bindings for Perl5 -- -*- mode: c -*- */
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
#include <bzlib.h>
#include "const-c.inc"
typedef unsigned char Bool;
#define True ((Bool)1)
#define False ((Bool)0)
#define BZ_IO_EOF (-100)
#define BZERRNO "Compress::Bzip2::bzerrno"
int global_bzip_errno = 0;
#define BZ_SETERR(obj, eee, infomsg) bzfile_seterror(obj, eee, infomsg)
#define OPEN_STATUS_ISCLOSED 0
#define OPEN_STATUS_READ 1
#define OPEN_STATUS_WRITE 2
#define OPEN_STATUS_WRITESTREAM 3
#define OPEN_STATUS_READSTREAM 4
typedef struct bzFile_s {
bz_stream strm;
PerlIO* handle;
int bzip_errno;
char bufferOfCompressed[BZ_MAX_UNUSED];
int nCompressed;
int compressedOffset_addmore;
int compressedOffset_takeout;
char bufferOfHolding[BZ_MAX_UNUSED];
int nHolding;
char bufferOfLines[BZ_MAX_UNUSED];
int bufferOffset;
int nBufferBytes;
char* streamBuf;
int streamBufSize;
int streamBufLen;
int streamBufOffset;
int open_status;
int run_progress;
int io_error;
Bool pending_io_error;
Bool allowUncompressedRead;
Bool notCompressed;
int scan_BZh9;
char BZh9[5];
int BZh9_count;
int verbosity;
int small;
int blockSize100k;
int workFactor;
long total_in;
long total_out;
} bzFile ;
typedef bzFile* Compress__Bzip2;
#ifdef CAN_PROTOTYPE
void bzfile_streambuf_set( bzFile* obj, char* buffer, int bufsize );
int bzfile_closeread( bzFile* obj, int abandon );
int bzfile_closewrite( bzFile* obj, int abandon );
int bzfile_read( bzFile* obj, char *bufferOfUncompress, int nUncompress );
#else
void bzfile_streambuf_set( );
int bzfile_closeread( );
int bzfile_closewrite( );
int bzfile_read( );
#endif
static SV*
#ifdef CAN_PROTOTYPE
deRef(SV * sv, char * string)
#else
deRef(sv, string)
SV * sv ;
char * string;
#endif
{
SV *last_sv = NULL;
while(SvROK(sv) && sv != last_sv) {
last_sv = sv;
sv = SvRV(sv) ;
switch(SvTYPE(sv)) {
case SVt_PVAV:
case SVt_PVHV:
case SVt_PVCV:
croak("%s: buffer parameter is not a SCALAR reference", string);
break;
default:
;
}
/* if (SvROK(sv))
croak("%s: buffer parameter is a reference to a reference", string) ;*/
}
if (!SvOK(sv)) croak("%s: buffer parameter is not a SCALAR reference", string);
/*sv = newSVpv("", 0);*/
return sv ;
}
static char *bzerrorstrings[] = {
"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 */
};
/* memory allocator */
static void*
#ifdef CAN_PROTOTYPE
bzmemalloc(void* opaque, int n, int m)
#else
bzalloc(opaque,n,m) void* opaque; int n; int m;
#endif
{
New(0,opaque,n*m,char);
return opaque;
}
/* memory deallocator */
static void
#ifdef CAN_PROTOTYPE
bzmemfree(void* opaque, void* p)
#else
bzfree(opaque, p) void* opaque; void* p;
#endif
{
Safefree(p);
}
int
#ifdef CAN_PROTOTYPE
bzfile_seterror(bzFile* obj, int error_num, char *error_info)
#else
bzfile_seterror(obj, error_num, error_info)
bzFile* obj;
int error_num;
char* error_info;
#endif
{
char *errstr ;
SV * bzerror_sv = perl_get_sv(BZERRNO, FALSE) ;
global_bzip_errno = error_num;
sv_setiv(bzerror_sv, error_num) ; /* set the integer part of the perl thing */
errstr = error_num * -1 < 0 || error_num * -1 > 9 ? "Unknown" : (char *) bzerrorstrings[ error_num * -1 ];
if ( obj != NULL ) {
obj->bzip_errno = error_num;
obj->io_error = error_num == BZ_IO_ERROR ? errno : 0;
}
/* set the string part of the perl thing */
if ( error_info == NULL ) {
if (error_num == BZ_IO_ERROR)
sv_setpvf(bzerror_sv, "%s (%d): %d %s", errstr, error_num, errno, Strerror(errno));
else
sv_setpvf(bzerror_sv, "%s (%d)", errstr, error_num);
}
else {
if (error_num == BZ_IO_ERROR)
sv_setpvf(bzerror_sv, "%s (%d): %s - %d %s", errstr, error_num, error_info, errno, Strerror(errno));
else
sv_setpvf(bzerror_sv, "%s (%d): %s", errstr, error_num, error_info);
}
SvIOK_on(bzerror_sv) ; /* say "I AM INTEGER (too)" */
return error_num;
}
#ifdef CAN_PROTOTYPE
PerlIO* bzfile_getiohandle( bzFile *obj ) {
#else
PerlIO* bzfile_getiohandle( obj ) bzFile *obj; {
#endif
return obj->handle;
}
#ifdef CAN_PROTOTYPE
Bool bzfile_error( bzFile *obj ) {
#else
Bool bzfile_error( obj ) bzFile *obj; {
#endif
return obj != NULL ? ( obj->bzip_errno ? True : False ) : global_bzip_errno ? True : False;
}
#ifdef CAN_PROTOTYPE
int bzfile_geterrno( bzFile *obj ) {
#else
int bzfile_geterrno( obj ) bzFile *obj; {
#endif
return obj == NULL ? global_bzip_errno : obj->bzip_errno;
}
#ifdef CAN_PROTOTYPE
const char *bzfile_geterrstr( bzFile *obj ) {
#else
const char *bzfile_geterrstr( obj ) bzFile *obj; {
#endif
int error_num = obj == NULL ? global_bzip_errno : obj->bzip_errno;
char *errstr = error_num * -1 < 0 || error_num * -1 > 9 ? "Unknown" : (char *) bzerrorstrings[ error_num * -1 ];
return errstr;
}
#ifdef CAN_PROTOTYPE
Bool bzfile_eof( bzFile *obj ) {
#else
Bool bzfile_eof( obj ) bzFile *obj; {
#endif
return obj == NULL ? False :
obj->bzip_errno == BZ_UNEXPECTED_EOF ? True :
obj->bzip_errno == BZ_OK && obj->pending_io_error && obj->io_error == BZ_IO_EOF ? True :
obj->bzip_errno != BZ_IO_ERROR ? False :
obj->io_error == BZ_IO_EOF ? True : False;
}
#ifdef CAN_PROTOTYPE
long bzfile_total_in( bzFile *obj ) {
#else
long bzfile_total_in( obj ) bzFile *obj; {
#endif
return obj == NULL ? 0 : obj->total_in;
}
#ifdef CAN_PROTOTYPE
long bzfile_total_out( bzFile *obj ) {
#else
long bzfile_total_out( obj ) bzFile *obj; {
#endif
return obj == NULL ? 0 : obj->total_out;
}
#ifdef CAN_PROTOTYPE
long bzfile_clear_totals( bzFile *obj ) {
#else
long bzfile_clear_totals( obj ) bzFile *obj; {
#endif
if (obj) {
obj->total_in = 0;
obj->total_out = 0;
}
return 0;
}
#ifdef CAN_PROTOTYPE
int bzfile_clearerr( bzFile *obj ) {
#else
int bzfile_clearerr( obj ) bzFile *obj; {
#endif
int error_num = obj == NULL ? global_bzip_errno : obj->bzip_errno;
int clear_flag = 1;
if ( error_num == BZ_IO_ERROR ) {
if (obj)
PerlIO_clearerr( obj->handle );
}
else if ( error_num == BZ_SEQUENCE_ERROR ) {
/* program error */
}
else if ( error_num == BZ_PARAM_ERROR ) {
/* program error */
}
else if ( error_num == BZ_MEM_ERROR ) {
clear_flag = 0; /* must close */
}
else if ( error_num == BZ_DATA_ERROR ) {
clear_flag = 0; /* must close or flush */
}
else if ( error_num == BZ_DATA_ERROR_MAGIC ) {
clear_flag = 0; /* must close or flush */
}
else if ( error_num == BZ_UNEXPECTED_EOF ) {
clear_flag = 0; /* must close */
}
else if ( error_num == BZ_OUTBUFF_FULL ) {
}
else if ( error_num == BZ_CONFIG_ERROR ) {
clear_flag = 0; /* we don't like the version of bzlib */
}
else if ( error_num == BZ_OK ) {
if ( obj && obj->pending_io_error ) {
if ( obj->io_error == BZ_IO_EOF ) {
PerlIO_clearerr( obj->handle );
clear_flag = 0;
}
}
else {
clear_flag = 0; /* this is a state, not an error */
return 1; /* but return success anyways */
}
}
else if ( error_num == BZ_RUN_OK ) {
clear_flag = 0; /* this is a state, not an error */
}
else if ( error_num == BZ_FLUSH_OK ) {
clear_flag = 0; /* this is a state, not an error */
}
else if ( error_num == BZ_FINISH_OK ) {
clear_flag = 0; /* this is a state, not an error */
}
else if ( error_num == BZ_STREAM_END ) {
clear_flag = 0; /* this is a state, not an error */
}
if ( clear_flag ) {
if ( obj ) {
obj->bzip_errno = 0;
obj->io_error = 0;
obj->pending_io_error = False;
}
global_bzip_errno = 0;
}
return clear_flag;
}
#ifdef CAN_PROTOTYPE
bzFile* bzfile_new( int verbosity, int small, int blockSize100k, int workFactor ) {
#else
bzFile* bzfile_new( verbosity, small, blockSize100k, workFactor )
int verbosity; int small; int blockSize100k; int workFactor; {
#endif
bzFile* obj = NULL;
/* creates a new bzFile object */
/* sets parameters */
if (small != 0 && small != 1) {
BZ_SETERR(NULL, BZ_PARAM_ERROR, "bzfile_new small out of range");
return NULL;
}
if (verbosity < 0 || verbosity > 4) {
BZ_SETERR(NULL, BZ_PARAM_ERROR, "bzfile_new verbosity out of range");
return NULL;
}
Newz(idthing, obj, 1, bzFile);
if (!obj) {
BZ_SETERR(NULL, BZ_IO_ERROR, NULL);
die( "Out of memory");
return NULL;
}
BZ_SETERR(obj, BZ_OK, NULL);
obj->open_status = OPEN_STATUS_ISCLOSED;
obj->run_progress = 0;
obj->io_error = 0;
obj->pending_io_error = False;
obj->handle = NULL;
obj->nCompressed = 0;
obj->compressedOffset_addmore = 0;
obj->compressedOffset_takeout = 0;
obj->verbosity = verbosity;
obj->small = small;
obj->blockSize100k = blockSize100k;
obj->workFactor = workFactor;
obj->bufferOffset = 0;
obj->nBufferBytes = 0;
obj->bzip_errno = 0;
obj->total_in = 0;
obj->total_out = 0;
obj->strm.bzalloc = bzmemalloc;
obj->strm.bzfree = bzmemfree;
obj->strm.opaque = NULL;
obj->allowUncompressedRead = False;
bzfile_streambuf_set( obj, NULL, 0 );
if (obj->verbosity >= 4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_new(%d,%d,%d,%d) called %p\n", verbosity, small, blockSize100k, workFactor, obj);
return obj;
}
#ifdef CAN_PROTOTYPE
void bzfile_free( bzFile* obj ) {
#else
void bzfile_free( obj ) bzFile* obj; {
#endif
if ( obj != NULL ) Safefree((void*) obj);
}
/* query and/or set param setting of bzFile */
/* param may be verbosity, small, blockSize100k or workFactor */
/* if setting is -1, the param is not changed, but the current value is returned */
/* returns -1 on error */
#ifdef CAN_PROTOTYPE
int bzfile_setparams( bzFile* obj, char* param, int setting ) {
#else
int bzfile_setparams( obj, param, setting ) bzFile* obj; char* param; int setting; {
#endif
int savsetting = -1;
if ( param[0] == '-' ) param++;
if ( param[0] == '-' ) param++;
if ( strEQ( param, "verbosity" ) ) {
savsetting = obj->verbosity;
if ( setting >= 0 && setting <= 4 )
obj->verbosity = setting;
else if ( setting != -1 ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
}
else if ( strEQ( param, "buffer" ) ) {
savsetting = BZ_MAX_UNUSED;
}
else if ( strEQ( param, "small" ) ) {
savsetting = obj->small;
if ( setting == 0 || setting == 1 )
obj->small = setting;
else if ( setting != -1 ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
}
else if ( strEQ( param, "blockSize100k" ) || strEQ( param, "level" ) ) {
savsetting = obj->blockSize100k;
if ( setting >= 1 && setting <= 9 )
obj->blockSize100k = setting;
else if ( setting != -1 ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
}
else if ( strEQ( param, "workFactor" ) ) {
savsetting = obj->workFactor;
if ( setting >= 0 && setting <= 250 )
obj->workFactor = setting;
else if ( setting != -1 ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
}
else if ( strEQ( param, "readUncompressed" ) ) {
savsetting = obj->allowUncompressedRead ? 1 : 0;
if ( setting >= 0 && setting <= 1 )
obj->allowUncompressedRead = setting ? True : False;
else if ( setting != -1 ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
}
else {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
savsetting = -1;
}
if (obj->verbosity>1) {
if ( savsetting == -1 )
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_setparams invalid param %s => %d\n", param, setting);
else
if ( setting == -1 )
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_setparams query %s is %d\n", param, savsetting);
else
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_setparams set %s (is %d) => %d\n", param, savsetting, setting);
}
return savsetting;
}
#ifdef CAN_PROTOTYPE
bzFile* bzfile_open( char *filename, char *mode, bzFile *obj ) {
#else
bzFile* bzfile_open( filename, mode, obj ) char *filename; char *mode; bzFile *obj; {
#endif
PerlIO *io;
io = PerlIO_open( filename, mode );
if ( io == NULL ) {
BZ_SETERR(obj, BZ_IO_ERROR, NULL);
if (obj && obj->verbosity > 0) warn( "Error: PerlIO_open( %s, %s ) failed: %s\n", filename, mode, Strerror(errno) );
return NULL;
}
#if defined(_WIN32) || defined(OS2) || defined(MSDOS) || defined(__CYGWIN__) || defined(WIN32)
PerlIO_binmode(aTHX_ io, mode[0]=='w' ? '>' : '<', O_BINARY, Nullch);
#endif
if ( obj == NULL ) obj = bzfile_new( 0, 0, 9, 0 );
obj->handle = io;
obj->open_status = mode && mode[0] == 'w' ? OPEN_STATUS_WRITE : OPEN_STATUS_READ;
if (obj->verbosity>=2)
PerlIO_printf(PerlIO_stderr(), "Info: PerlIO_open( %s, %s ) succeeded, obj=%p\n", filename, mode, obj );
return obj;
}
#ifdef CAN_PROTOTYPE
bzFile* bzfile_fdopen( PerlIO *io, char *mode, bzFile *obj ) {
#else
bzFile* bzfile_fdopen( io, mode, obj ) PerlIO *io; char *mode; bzFile *obj; {
#endif
if ( io == NULL ) {
BZ_SETERR(obj, BZ_PARAM_ERROR, NULL);
return NULL;
}
#if defined(_WIN32) || defined(OS2) || defined(MSDOS) || defined(__CYGWIN__) || defined(WIN32)
PerlIO_binmode(aTHX_ io, mode[0]=='w' ? '>' : '<', O_BINARY, Nullch);
#endif
if ( obj == NULL ) obj = bzfile_new( 0, 0, 9, 0 );
obj->handle = io;
obj->open_status = mode && mode[0] == 'w' ? OPEN_STATUS_WRITE : OPEN_STATUS_READ;
return obj;
}
#ifdef CAN_PROTOTYPE
bzFile* bzfile_openstream( char *mode, bzFile *obj ) {
#else
bzFile* bzfile_openstream( mode, obj ) char *mode; bzFile *obj; {
#endif
if ( obj == NULL ) obj = bzfile_new( 0, 0, 1, 0 );
if ( obj == NULL ) return NULL;
obj->open_status = mode && mode[0] == 'w' ? OPEN_STATUS_WRITESTREAM : OPEN_STATUS_READSTREAM;
return obj;
}
#ifdef CAN_PROTOTYPE
void bzfile_streambuf_deposit( bzFile* obj, char* buffer, int buflen ) {
#else
void bzfile_streambuf_deposit( obj, buffer, buflen ) bzFile* obj; char* buffer; int buflen; {
#endif
/* inflate */
/* insert compressed data into reading stream */
obj->streamBuf = buffer;
obj->streamBufSize = buflen;
obj->streamBufLen = buflen;
obj->streamBufOffset = 0;
}
#ifdef CAN_PROTOTYPE
int bzfile_streambuf_read( bzFile* obj, char* out, int outlen ) {
#else
int bzfile_streambuf_read( obj, out, outlen ) bzFile* obj; char* out; int outlen; {
#endif
/* inflate */
/* read compressed data from buffer */
char *in;
int i;
int n = obj->streamBufLen - obj->streamBufOffset;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_streambuf_read( %p, %d ), buffer %p, sz=%d, len=%d, offset=%d\n",
out, outlen, obj->streamBuf, obj->streamBufSize, obj->streamBufLen, obj->streamBufOffset );
if ( n <= 0 ) {
/* EAGAIN */
errno = EAGAIN;
return -1;
}
in = obj->streamBuf + obj->streamBufOffset;
for ( i=0; i<outlen && i<n; i++)
*out++ = *in++;
obj->streamBufOffset += i;
return i;
}
#ifdef CAN_PROTOTYPE
void bzfile_streambuf_set( bzFile* obj, char* buffer, int bufsize ) {
#else
void bzfile_streambuf_set( obj, buffer, bufsize ) bzFile* obj; char* buffer; int bufsize; {
#endif
/* deflate */
obj->streamBuf = buffer;
obj->streamBufSize = bufsize;
obj->streamBufLen = 0;
obj->streamBufOffset = 0;
}
#ifdef CAN_PROTOTYPE
int bzfile_streambuf_write( bzFile* obj, char* in, int inlen ) {
#else
int bzfile_streambuf_write( obj, in, inlen ) bzFile* obj; char* in; int inlen; {
#endif
/* deflate */
/* write compressed data to buffer */
char *out;
int i;
int available_space = obj->streamBufSize - obj->streamBufLen;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_streambuf_write( %p, %d ), buffer %p, sz=%d, len=%d, offset=%d\n",
in, inlen, obj->streamBuf, obj->streamBufSize, obj->streamBufLen, obj->streamBufOffset );
if ( available_space <= 0 ) {
errno = EAGAIN;
return -1; /* EAGAIN */
}
out = obj->streamBuf + obj->streamBufOffset;
for ( i=0; i<inlen && i<available_space; i++)
*out++ = *in++;
obj->streamBufLen += i;
return i;
}
#ifdef CAN_PROTOTYPE
int bzfile_streambuf_collect( bzFile* obj, char* out, int outlen ) {
#else
int bzfile_streambuf_collect( obj, out, outlen ) bzFile* obj; char* out; int outlen; {
#endif
/* deflate */
/* pull collected compressed data from buffer */
int ret;
ret = bzfile_streambuf_read( obj, out, outlen );
if ( ret == -1 ) {
/* got all the data out, reset the counters */
obj->streamBufLen = 0;
obj->streamBufOffset = 0;
}
return ret;
}
/* success: 0 returned */
/* failure: -1 returned, global error set */
/* other error: -2 returned, global error already set */
#ifdef CAN_PROTOTYPE
int bzfile_flush( bzFile* obj ) {
#else
int bzfile_flush( obj ) bzFile* obj; {
#endif
int error_num = bzfile_geterrno( obj );
int tracker;
int compressed_bytes_count;
if ( obj == NULL ) return 0;
if ( obj->run_progress == 0 || obj->run_progress == 10 ) return 0;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_flush called, error_num=%d, open_status %d\n",
error_num, obj->open_status);
if ( error_num == BZ_OK ) {
}
else if ( error_num == BZ_IO_ERROR ) {
if ( obj->io_error == EAGAIN || obj->io_error == EINTR ) {
obj->io_error = 0;
BZ_SETERR(obj, BZ_OK, NULL);
}
else if ( obj->io_error == BZ_IO_EOF ) {
PerlIO_clearerr( obj->handle );
}
else {
return -2;
}
}
else if ( error_num == BZ_DATA_ERROR ) {
/* a read error */
}
else if ( error_num == BZ_UNEXPECTED_EOF ) {
/* a read error */
}
else if ( error_num == BZ_OUTBUFF_FULL ) {
/* only when compressing or decompressing a buffer */
return -2;
}
else {
return -2;
}
if (obj->open_status == OPEN_STATUS_WRITE || obj->open_status == OPEN_STATUS_WRITESTREAM) {
int ret = BZ_OK;
while (True) {
obj->strm.next_out = obj->bufferOfCompressed + obj->compressedOffset_addmore;
obj->strm.avail_out = sizeof(obj->bufferOfCompressed) - obj->compressedOffset_addmore;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_flush: call to BZ2_bzCompress with avail_in %d, next_in %p, avail_out %d, next_out %p, run_progress %d\n",
obj->strm.avail_in, obj->strm.next_in, obj->strm.avail_out, obj->strm.next_out, obj->run_progress);
compressed_bytes_count = obj->strm.avail_out;
tracker = obj->strm.avail_in;
if ( obj->strm.avail_out <= 0 || obj->run_progress > 2 )
ret = obj->run_progress <= 2 ? BZ_FLUSH_OK : BZ_RUN_OK;
else {
ret = BZ2_bzCompress( &(obj->strm), BZ_FLUSH );
if ( ret == BZ_RUN_OK ) obj->run_progress = 3;
}
if (ret != BZ_RUN_OK && ret != BZ_FLUSH_OK) {
BZ_SETERR(obj, ret, NULL);
if (obj->verbosity>1)
warn("Error: bzfile_flush, BZ2_bzCompress error %d, strm is %p, strm.state is %p, in state %d\n",
ret, &(obj->strm), obj->strm.state, *((int*)obj->strm.state));
return -1;
}
obj->total_in += tracker - obj->strm.avail_in;
compressed_bytes_count -= obj->strm.avail_out;
obj->compressedOffset_addmore += compressed_bytes_count;
obj->nCompressed += compressed_bytes_count;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_flush BZ2_bzCompress, took in %d, put out %d bytes, ret %d\n",
tracker-obj->strm.avail_in, compressed_bytes_count, ret);
if ( obj->nCompressed ) {
int n, n2;
n = obj->nCompressed;
while ( n > 0 ) {
if ( obj->open_status == OPEN_STATUS_WRITESTREAM )
n2 = bzfile_streambuf_write( obj, obj->bufferOfCompressed + obj->compressedOffset_takeout, n );
else
if ( obj->handle )
n2 = PerlIO_write( obj->handle, obj->bufferOfCompressed + obj->compressedOffset_takeout, n );
else
n2 = n;
if ( n2==-1 ) {
BZ_SETERR(obj, BZ_IO_ERROR, NULL);
if ( errno != EINTR && errno != EAGAIN ) {
if (obj->verbosity>0)
warn("Error: bzfile_flush io error %d '%s'\n", errno, Strerror(errno));
}
else {
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_flush: file write error %s\n", Strerror(errno));
}
return -1;
}
else {
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_flush: file write took in %d, put out %d\n", n, n2);
obj->compressedOffset_takeout += n2;
obj->nCompressed -= n2;
n -= n2;
obj->total_out += n2;
}
}
obj->nCompressed = 0;
obj->compressedOffset_addmore = 0;
obj->compressedOffset_takeout = 0;
}
if (obj->verbosity>1)
PerlIO_printf(PerlIO_stderr(), "Info: bzfile_flush ret %d, total written %ld\n", ret, obj->total_out );
if (ret == BZ_RUN_OK) {
obj->run_progress = 1;
break;
}
}
if ( obj->handle && !PerlIO_error( obj->handle ) ) {
/* ok, we got bzip flushed out, now flush out the IO buffers themselves */
if ( -1 == PerlIO_flush( obj->handle ) ) {
BZ_SETERR(obj, BZ_IO_ERROR, NULL);
return -1;
}
}
}
else {
/* decompressing from a read IO handle */
obj->nBufferBytes = 0; /* toss getreadline data */
/* can't flush the file handle, that will cause the compression stream to break up */
/* the program will be unable to uncompress subsequent data, up to the next checkpoint */
if ( error_num == BZ_DATA_ERROR ) {
/* a read error */
/* could look ahead for that 49 bit pattern ... */
return -2; /* for now */
}
else if ( error_num == BZ_UNEXPECTED_EOF ) {
return -2;
}
}
return 0;
}
#ifdef CAN_PROTOTYPE
int bzfile_close( bzFile* obj, int abandon ) {
#else
int bzfile_close( obj, abandon ) bzFile* obj; int abandon; {
#endif
/* returns zero on success, -1 on error */
int ret;
if ( obj->open_status == OPEN_STATUS_ISCLOSED ) {
BZ_SETERR(obj, BZ_SEQUENCE_ERROR, NULL);
return -1;
}
if (obj->open_status == OPEN_STATUS_WRITE || obj->open_status == OPEN_STATUS_WRITESTREAM)
ret = bzfile_closewrite( obj, abandon );
else
ret = bzfile_closeread( obj, abandon );
if ( ret == BZ_OK ) obj->open_status = OPEN_STATUS_ISCLOSED;
return ret != BZ_OK ? -1 : 0;
}
#ifdef CAN_PROTOTYPE
int bzfile_closeread( bzFile* obj, int abandon ) {
#else
int bzfile_closeread( obj, abandon ) bzFile* obj; int abandon; {
#endif
int ret = BZ_OK;
if (obj->open_status == OPEN_STATUS_WRITE || obj->open_status == OPEN_STATUS_WRITESTREAM)
return BZ_SETERR(obj, BZ_SEQUENCE_ERROR, NULL);
if ( obj->run_progress!=0 && obj->run_progress!=10 )
ret = BZ2_bzDecompressEnd( &(obj->strm) );
obj->run_progress = 0;
obj->nBufferBytes = 0; /* toss getreadline data */
obj->pending_io_error = False;
if ( obj->handle )
if ( 0 != PerlIO_close( obj->handle ) )
ret = BZ_SETERR(obj, BZ_IO_ERROR, NULL);
return BZ_SETERR(obj, ret, NULL);
}
#ifdef CAN_PROTOTYPE
int bzfile_closewrite( bzFile* obj, int abandon ) {
#else
int bzfile_closewrite( obj, abandon ) bzFile* obj; int abandon; {
#endif
int error_num = bzfile_geterrno( obj );
int ret = BZ_OK;
int tracker;
int compressed_bytes_count;
if (obj->verbosity>=2)
PerlIO_printf(PerlIO_stderr(), "Info: bzfile_closewrite called, abandon=%d, error_num=%d, open_status %d\n",
abandon, error_num, obj->open_status);
if ( obj == NULL ) return BZ_SETERR(NULL, BZ_OK, NULL);
if (obj->open_status != OPEN_STATUS_WRITE && obj->open_status != OPEN_STATUS_WRITESTREAM)
return BZ_SETERR(obj, BZ_SEQUENCE_ERROR, NULL);
if ( error_num == BZ_OK ) {
}
else if ( error_num == BZ_IO_ERROR ) {
if ( obj->io_error == EAGAIN || obj->io_error == EINTR ) {
obj->io_error = 0;
BZ_SETERR(obj, BZ_OK, NULL);
}
else if ( !abandon )
return error_num;
}
else if ( error_num == BZ_DATA_ERROR ) {
/* a read error */
if ( !abandon ) return error_num;
}
else if ( error_num == BZ_UNEXPECTED_EOF ) {
/* a read error */
if ( !abandon ) return error_num;
}
else if ( error_num == BZ_OUTBUFF_FULL ) {
/* only when compressing or decompressing a buffer */
if ( !abandon ) return error_num;
}
else {
if ( !abandon ) return error_num;
}
if ( obj->run_progress!=0 ) {
if ( !abandon ) {
while (True) {
obj->strm.next_out = obj->bufferOfCompressed + obj->compressedOffset_addmore;
obj->strm.avail_out = sizeof(obj->bufferOfCompressed) - obj->compressedOffset_addmore;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_closewrite: call to BZ2_bzCompress with avail_in %d, next_in %p, avail_out %d, next_out %p, run_progress %d\n",
obj->strm.avail_in, obj->strm.next_in, obj->strm.avail_out, obj->strm.next_out, obj->run_progress);
compressed_bytes_count = obj->strm.avail_out;
tracker = obj->strm.avail_in;
if ( obj->strm.avail_out <= 0 || obj->run_progress > 2 )
ret = obj->run_progress <= 2 ? BZ_FINISH_OK : BZ_STREAM_END;
else {
ret = BZ2_bzCompress( &(obj->strm), BZ_FINISH );
if ( ret == BZ_STREAM_END ) obj->run_progress = 9;
}
if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END) {
BZ_SETERR(obj, ret, NULL);
if (obj->verbosity>=1)
PerlIO_printf(PerlIO_stderr(), "Warning: bzfile_closewrite BZ2_bzCompress error %d\n", ret);
return ret;
}
obj->total_in += tracker - obj->strm.avail_in;
compressed_bytes_count -= obj->strm.avail_out;
obj->compressedOffset_addmore += compressed_bytes_count;
obj->nCompressed += compressed_bytes_count;
if (obj->verbosity>=4)
PerlIO_printf(PerlIO_stderr(), "debug: bzfile_closewrite BZ2_bzCompress, took in %d, put out %d bytes, ret %d\n",
tracker-obj->strm.avail_in, compressed_bytes_count, ret);
if ( obj->nCompressed ) {
int n, n2;
n = obj->nCompressed;
while ( n > 0 ) {
if ( obj->open_status == OPEN_STATUS_WRITESTREAM )
n2 = bzfile_streambuf_write( obj, obj->bufferOfCompressed + obj->compressedOffset_takeout, n );
else
if ( obj->handle )
n2 = PerlIO_write( obj->handle, obj->bufferOfCompressed + obj->compressedOffset_takeout, n );
else
n2 = n;
if ( n2==-1 ) {
BZ_SETERR(obj, BZ_IO_ERROR, NULL);
if ( errno != EINTR && errno != EAGAIN ) {
if (obj->verbosity>0)
warn("Error: bzfile_closewrite io error %d '%s'\n", errno, Strerror(errno));
}
else {