static int
ZIPDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
{
static const char module[] = "ZIPDecode";
ZIPState* sp = DecoderState(tif);
(void) s;
assert(sp != NULL);
assert(sp->state == ZSTATE_INIT_DECODE);
sp->stream.next_in = tif->tif_rawcp;
sp->stream.avail_in = (uInt) tif->tif_rawcc;
sp->stream.next_out = op;
assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised,
we need to simplify this code to reflect a ZLib that is likely updated
to deal with 8byte memory sizes, though this code will respond
appropriately even before we simplify it */
sp->stream.avail_out = (uInt) occ;
if ((tmsize_t)sp->stream.avail_out != occ)
{
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
return (0);
}
do {
int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
if (state == Z_STREAM_END)
break;
if (state == Z_DATA_ERROR) {
TIFFErrorExt(tif->tif_clientdata, module,
"Decoding error at scanline %lu, %s",
(unsigned long) tif->tif_row, SAFE_MSG(sp));
if (inflateSync(&sp->stream) != Z_OK)
return (0);
continue;
}
if (state != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module,
"ZLib error: %s", SAFE_MSG(sp));
return (0);
}
} while (sp->stream.avail_out > 0);
if (sp->stream.avail_out != 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Not enough data at scanline %lu (short " TIFF_UINT64_FORMAT " bytes)",
(unsigned long) tif->tif_row, (TIFF_UINT64_T) sp->stream.avail_out);
return (0);
}
tif->tif_rawcp = sp->stream.next_in;
tif->tif_rawcc = sp->stream.avail_in;
return (1);
}
/*
* Finish off an encoded strip by flushing the last
* string and tacking on an End Of Information code.
*/
static int
ZIPPostEncode(TIFF* tif)
{
static const char module[] = "ZIPPostEncode";
ZIPState *sp = EncoderState(tif);
int state;
sp->stream.avail_in = 0;
do {
state = deflate(&sp->stream, Z_FINISH);
switch (state) {
case Z_STREAM_END:
case Z_OK:
if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
{
tif->tif_rawcc = tif->tif_rawdatasize - sp->stream.avail_out;
TIFFFlushData1(tif);
sp->stream.next_out = tif->tif_rawdata;
sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
}
break;
default:
TIFFErrorExt(tif->tif_clientdata, module,
"ZLib error: %s", SAFE_MSG(sp));
return (0);
}
} while (state != Z_STREAM_END);
return (1);
}
static int
ZIPSetupDecode(TIFF* tif)
{
static const char module[] = "ZIPSetupDecode";
ZIPState* sp = DecoderState(tif);
assert(sp != NULL);
/* if we were last encoding, terminate this mode */
if (sp->state & ZSTATE_INIT_ENCODE) {
deflateEnd(&sp->stream);
sp->state = 0;
}
/* This function can possibly be called several times by */
/* PredictorSetupDecode() if this function succeeds but */
/* PredictorSetup() fails */
if ((sp->state & ZSTATE_INIT_DECODE) == 0 &&
inflateInit(&sp->stream) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module, "%s", SAFE_MSG(sp));
return (0);
} else {
sp->state |= ZSTATE_INIT_DECODE;
return (1);
}
}
static int
ZIPSetupEncode(TIFF* tif)
{
static const char module[] = "ZIPSetupEncode";
ZIPState* sp = EncoderState(tif);
assert(sp != NULL);
if (sp->state & ZSTATE_INIT_DECODE) {
inflateEnd(&sp->stream);
sp->state = 0;
}
if (deflateInit(&sp->stream, sp->zipquality) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module, "%s", SAFE_MSG(sp));
return (0);
} else {
sp->state |= ZSTATE_INIT_ENCODE;
return (1);
}
}
static int
ZIPSetupDecode(TIFF* tif)
{
static const char module[] = "ZIPSetupDecode";
ZIPState* sp = DecoderState(tif);
assert(sp != NULL);
/* if we were last encoding, terminate this mode */
if (sp->state & ZSTATE_INIT_ENCODE) {
deflateEnd(&sp->stream);
sp->state = 0;
}
if (inflateInit(&sp->stream) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module, "%s", SAFE_MSG(sp));
return (0);
} else {
sp->state |= ZSTATE_INIT_DECODE;
return (1);
}
}
static int
ZIPVSetField(TIFF* tif, uint32 tag, va_list ap)
{
static const char module[] = "ZIPVSetField";
ZIPState* sp = ZState(tif);
switch (tag) {
case TIFFTAG_ZIPQUALITY:
sp->zipquality = (int) va_arg(ap, int);
if ( sp->state&ZSTATE_INIT_ENCODE ) {
if (deflateParams(&sp->stream,
sp->zipquality, Z_DEFAULT_STRATEGY) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
SAFE_MSG(sp));
return (0);
}
}
return (1);
default:
return (*sp->vsetparent)(tif, tag, ap);
}
/*NOTREACHED*/
}
/*
* Encode a chunk of pixels.
*/
static int
ZIPEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
{
static const char module[] = "ZIPEncode";
ZIPState *sp = EncoderState(tif);
assert(sp != NULL);
assert(sp->state == ZSTATE_INIT_ENCODE);
(void) s;
sp->stream.next_in = bp;
assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised,
we need to simplify this code to reflect a ZLib that is likely updated
to deal with 8byte memory sizes, though this code will respond
appropriately even before we simplify it */
sp->stream.avail_in = (uInt) cc;
if ((tmsize_t)sp->stream.avail_in != cc)
{
TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
return (0);
}
do {
if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
TIFFErrorExt(tif->tif_clientdata, module,
"Encoder error: %s",
SAFE_MSG(sp));
return (0);
}
if (sp->stream.avail_out == 0) {
tif->tif_rawcc = tif->tif_rawdatasize;
TIFFFlushData1(tif);
sp->stream.next_out = tif->tif_rawdata;
sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in ZIPPreEncode */
}
} while (sp->stream.avail_in > 0);
return (1);
}
int run_gdb(unsigned dbg_flags, const char *dbg_opts) {
// Note that this function and it's callee's should be signal-safe.
// Strlen and sprintf are not officially signal-safe but come on...
// Check if gdb is already attached
if(gdb_pid != -1) {
int status = 0;
pid_t res_pid = waitpid(gdb_pid, &status, WNOHANG);
if(res_pid == -1) {
SAFE_MSG("libdebugme: failed to check status of debugger\n");
return 0;
} else if(res_pid == 0
|| (res_pid == gdb_pid && !WIFEXITED(status) && !WIFSIGNALED(status))) {
SAFE_MSG("libdebugme: can't attach more than one debugger simultaneously\n");
return 0;
}
gdb_pid = -1;
}
gdb_pid = fork();
switch(gdb_pid) {
case -1:
SAFE_MSG("libdebugme: failed to fork\n");
return 0;
case 0: {
// Child
pid_t ppid = getppid();
char buf[256];
int nread = snprintf(buf, sizeof(buf),
"gdb -ex 'attach %ld' "
// Unblock parent process
"-ex 'set __debugme_go=1' "
// Wait untils it breaks
"-ex continue "
// Return from raise()
"-ex finish "
// Give control to user
"%s", (long)ppid, dbg_opts);
if(nread >= (int)sizeof(buf) - 1) {
SAFE_MSG("libdebugme: increase size of buffer in run_gdb\n");
exit(1);
}
if(dbg_flags & DEBUGME_XTERM) {
execl("/usr/bin/xterm", "/usr/bin/xterm", "-e", buf, (char *)0);
} else {
execl("/bin/bash", "/bin/bash", "-c", buf, (char *)0);
}
SAFE_MSG("libdebugme: failed to run gdb command: /bin/bash -c ");
SAFE_MSG(buf);
SAFE_MSG("\n");
_exit(1);
}
}
// Parent
return 1;
}
