/// Parse multiplication and division
word36 ParseFactors() {
word36 num1 = ParseAtom();
for(;;) {
// Skip spaces
while(*expr == ' ')
expr++;
/// Save the operation and position
char op = *expr;
char* pos = expr;
if(op != '/' && op != '*' && op != '%')
return num1;
expr++;
word36 num2 = ParseAtom();
// Perform the saved operation
if(op == '/' || op == '%') {
// Handle division/modulus by zero
if(num2 == 0) {
_err = EEE_DIVIDE_BY_ZERO;
_err_pos = pos;
return 0;
}
if (op == '/')
num1 /= num2;
else
num1 %= num2;
}
else
num1 *= num2;
}
}
M4Err ghnt_Read(Atom *s, BitStream *bs, u64 *read)
{
Atom *a;
u64 sr;
M4Err e;
HintSampleEntryAtom *ptr = (HintSampleEntryAtom *)s;
if (ptr == NULL) return M4BadParam;
BS_ReadData(bs, ptr->reserved, 6);
ptr->dataReferenceIndex = BS_ReadInt(bs, 16);
*read += 8;
ptr->HintTrackVersion = BS_ReadInt(bs, 16);
ptr->LastCompatibleVersion = BS_ReadInt(bs, 16);
ptr->MaxPacketSize = BS_ReadInt(bs, 32);
*read += 8;
while (*read < ptr->size) {
e = ParseAtom(&a, bs, &sr);
if (e) return e;
e = ChainAddEntry(ptr->HintDataTable, a);
if (e) return e;
*read += a->size;
}
if (*read != ptr->size) return M4ReadAtomFailed;
return M4OK;
}
M4Err tx3g_Read(Atom *s, BitStream *bs, u64 *read)
{
M4Err e;
u64 sr;
Atom *a;
TextSampleEntryAtom *ptr = (TextSampleEntryAtom*)s;
BS_ReadData(bs, (unsigned char*)ptr->reserved, 6);
ptr->dataReferenceIndex = BS_ReadInt(bs, 16);
ptr->displayFlags = BS_ReadInt(bs, 32);
ptr->horizontal_justification = BS_ReadInt(bs, 8);
ptr->vertical_justification = BS_ReadInt(bs, 8);
ptr->back_color = gpp_read_rgba(bs);
gpp_read_box(bs, &ptr->default_box);
gpp_read_style(bs, &ptr->default_style);
*read += 18 + GPP_BOX_SIZE + GPP_STYLE_SIZE;
while (*read < ptr->size) {
e = ParseAtom(&a, bs, &sr);
if (e) return e;
*read += a->size;
if (a->type==FontTableAtomType) {
if (ptr->font_table) DelAtom((Atom *) ptr->font_table);
ptr->font_table = (FontTableAtom *)a;
} else {
DelAtom(a);
}
}
if (*read != ptr->size) return M4ReadAtomFailed;
return M4OK;
}
void
nsAttrValue::ParseStringOrAtom(const nsAString& aValue)
{
PRUint32 len = aValue.Length();
// Don't bother with atoms if it's an empty string since
// we can store those efficently anyway.
if (len && len <= NS_ATTRVALUE_MAX_STRINGLENGTH_ATOM) {
ParseAtom(aValue);
}
else {
SetTo(aValue);
}
}
void DwRfc1521Tokenizer::ParseToken()
{
// Assume the field body has already been extracted. That is, we don't
// have to watch for the end of the field body or folding. We just
// treat any CRs or LFs as white space.
mTokenStart = mNextStart;
mTokenLength = 0;
mTkType = eTkNull;
if (mTokenStart >= mString.length()) {
return;
}
// Skip leading space. Also, since control chars are not permitted
// in atoms, skip these, too.
while (1) {
if (mTokenStart >= mString.length()) {
return;
}
if (!isspace(mString[mTokenStart]) && !iscntrl(mString[mTokenStart]))
break;
++mTokenStart;
}
char ch = mString[mTokenStart];
// Quoted string
if (ch == '"') {
mTkType = eTkQuotedString;
ParseQuotedString();
}
// Comment
else if (ch == '(') {
mTkType = eTkComment;
ParseComment();
}
// Domain literal
else if (ch == '[') {
mTkType = eTkDomainLiteral;
ParseDomainLiteral();
}
// Special
else if (istspecial(ch)) {
mTkType = eTkTspecial;
mTokenLength = 1;
mToken = mString.substr(mTokenStart, 1);
mNextStart = mTokenStart + 1;
}
// Atom
else {
mTkType = eTkToken;
ParseAtom();
}
if (mDebugOut) PrintToken(mDebugOut);
}
M4Err amr3_Read(Atom *s, BitStream *bs, u64 *read)
{
M4Err e;
u64 sub_read;
AMRSampleEntryAtom *ptr = (AMRSampleEntryAtom *)s;
if (ptr == NULL) return M4BadParam;
ReadAudioSampleEntry((AudioSampleEntryAtom*)s, bs, read);
e = ParseAtom((Atom **)&ptr->amr_info, bs, &sub_read);
if (e) return e;
*read += sub_read;
if (*read != s->size) return M4ReadAtomFailed;
return M4OK;
}
M4Err h263_Read(Atom *s, BitStream *bs, u64 *read)
{
M4Err e;
u64 sub_read;
H263SampleEntryAtom *ptr = (H263SampleEntryAtom *)s;
if (ptr == NULL) return M4BadParam;
ReadVideoSampleEntry((VisualSampleEntryAtom *)ptr, bs, read);
e = ParseAtom((Atom **)&ptr->h263_config, bs, &sub_read);
if (e) return e;
*read += sub_read;
if (*read != ptr->size) return M4ReadAtomFailed;
return M4OK;
}
M4Err avc1_Read(Atom *s, BitStream *bs, u64 *read)
{
M4Err e;
u64 sr;
Atom *a;
AVCSampleEntryAtom *ptr = (AVCSampleEntryAtom *)s;
ReadVideoSampleEntry((VisualSampleEntryAtom *)ptr, bs, read);
while (*read < ptr->size) {
e = ParseAtom(&a, bs, &sr);
if (e) return e;
*read += a->size;
e = avc1_AddAtom(ptr, a);
if (e) return e;
}
AVC_RewriteESDescriptor(ptr);
return (*read != ptr->size) ? M4ReadAtomFailed : M4OK;
}
// Piece ::= Atom [ Repeat ]
Instruction* ParsePiece(const char **ppc, ParseInfo &info)
{
Instruction *i = ParseAtom(ppc, info);
if (i)
{
bool failed = false;
Repeat *r = ParseRepeat(ppc, failed, info);
if (r)
{
r->setInstruction(i);
i = r;
}
else if (failed)
{
delete i;
return 0;
}
}
return i;
}
//Add this funct to handle incomplete files...
//bytesExpected is 0 most of the time. If the file is incomplete, bytesExpected
//is the number of bytes missing to parse the atom...
M4Err ParseRootAtom(Atom **outAtom, BitStream *bs, u64 *bytesExpected)
{
M4Err ret;
u64 read;
//first make sure we can at least get the atom size and type...
//18 = size (int32) + type (int32)
if (BS_Available(bs) < 8) {
*bytesExpected = 8;
return M4UncompleteFile;
}
ret = ParseAtom(outAtom, bs, &read);
if (ret == M4UncompleteFile) {
*bytesExpected = (*outAtom)->size - read - BS_Available(bs);
//rewind our BitStream for next parsing
BS_Rewind(bs, read);
DelAtom(*outAtom);
*outAtom = NULL;
}
return ret;
}
// I kept the same interface, because.. well.. it seemed to make sense at the time.
int qtmovie_read(stream_t *file, demux_res_t *demux_res)
{
// Our parameter object..
qtmovie_t qtmovie;
// Our filesize
long fileSize;
// We haven't found the mdat chunk yet..
g_FoundMdatAtom = 0;
g_IsM4AFile = 0;
g_IsAppleLossless = 0;
g_StopParsing = 0;
// construct the stream;
qtmovie.stream = file;
qtmovie.res = demux_res;
// Find the file length..
stream_seek( file, 0, SEEK_END );
fileSize = stream_tell( file );
stream_seek( file, 0, SEEK_SET );
// find the goo inside..
ParseAtom( 0, fileSize, &qtmovie );
// Return our state to the caller..
if ( g_FoundMdatAtom && g_IsM4AFile && g_IsAppleLossless )
return 1;
else
{
// Something didn't go right, so we attempt to clear the allocations that were made during
// the failed call, before returning that it failed to the caller.
free( demux_res->codecdata );
free( demux_res->time_to_sample );
free( demux_res->sample_byte_size );
return 0;
}
}
/*
* NAME
* QuerySCCData - Query for the SCC data on the root window
*
* SYNOPSIS
*/
static void
QuerySCCDataRGB(Display *dpy, Window root)
/*
* DESCRIPTION
*
* RETURNS
* None
*/
{
char *property_return, *pChar;
int i, j;
int count, format, cType, nTables;
unsigned long nitems, nbytes_return;
Atom MatricesAtom, CorrectAtom;
VisualID visualID;
XVisualInfo vinfo_template, *vinfo_ret;
int nvis;
static char *visual_strings[] = {
"StaticGray",
"GrayScale",
"StaticColor",
"PseudoColor",
"TrueColor",
"DirectColor"
};
/*
* Get Matrices
*/
MatricesAtom = ParseAtom (dpy, XDCCC_MATRIX_ATOM_NAME, True);
if (MatricesAtom != None) {
if (_XcmsGetProperty (dpy, root, MatricesAtom, &format, &nitems,
&nbytes_return, &property_return) == XcmsFailure) {
format = 0;
} else if (nitems != 18) {
printf ("Property %s had invalid length of %ld\n",
XDCCC_MATRIX_ATOM_NAME, nitems);
if (property_return) {
XFree (property_return);
}
return;
}
}
if (MatricesAtom == None || !format) {
printf ("Could not find property %s\n", XDCCC_MATRIX_ATOM_NAME);
} else if (format != 32) {
printf ("Data in property %s not in 32 bit format\n",
XDCCC_MATRIX_ATOM_NAME);
} else {
pChar = property_return;
printf ("Screen: %d\n", DefaultScreen(dpy));
printf ("Querying property %s\n", XDCCC_MATRIX_ATOM_NAME);
printf ("\tXYZtoRGB matrix :\n");
for (i = 0; i < 3; i++) {
printf ("\t");
for (j = 0; j < 3; j++) {
printf ("\t%8.5f",
(long)_XcmsGetElement(format, &pChar, &nitems)
/ (XcmsFloat) XDCCC_NUMBER);
}
printf ("\n");
}
printf ("\tRGBtoXYZ matrix :\n");
for (i = 0; i < 3; i++) {
printf ("\t");
for (j = 0; j < 3; j++) {
printf ("\t%8.5f",
(long) _XcmsGetElement(format, &pChar, &nitems)
/ (XcmsFloat) XDCCC_NUMBER);
}
printf ("\n");
}
XFree (property_return);
}
/*
* Get Intensity Tables
*/
CorrectAtom = XInternAtom (dpy, XDCCC_CORRECT_ATOM_NAME, True);
if (CorrectAtom != None) {
if (_XcmsGetProperty (dpy, root, CorrectAtom, &format, &nitems,
&nbytes_return, &property_return) == XcmsFailure) {
format = 0;
} else if (nitems <= 0) {
printf ("Property %s had invalid length of %ld\n",
XDCCC_CORRECT_ATOM_NAME, nitems);
if (property_return) {
XFree (property_return);
}
return;
}
}
if (CorrectAtom == None || !format) {
printf ("Could not find property %s\n", XDCCC_CORRECT_ATOM_NAME);
} else {
printf ("\nQuerying property %s\n", XDCCC_CORRECT_ATOM_NAME);
pChar = property_return;
while (nitems) {
switch (format) {
case 8:
/*
* Must have at least:
* VisualID0
* VisualID1
* VisualID2
* VisualID3
* type
* count
* length
* intensity1
* intensity2
*/
if (nitems < 9) {
goto IntensityTblError;
}
count = 3;
break;
case 16:
/*
* Must have at least:
* VisualID0
* VisualID3
* type
* count
* length
* intensity1
* intensity2
*/
if (nitems < 7) {
goto IntensityTblError;
}
count = 1;
break;
case 32:
/*
* Must have at least:
* VisualID0
* type
* count
* length
* intensity1
* intensity2
*/
if (nitems < 6) {
goto IntensityTblError;
}
count = 0;
break;
default:
goto IntensityTblError;
}
/*
* Get VisualID
*/
visualID = _XcmsGetElement(format, &pChar, &nitems);
/* add the depth, class, and bits info in output */
vinfo_template.visualid = visualID;
vinfo_ret = XGetVisualInfo(dpy, VisualIDMask, &vinfo_template,
&nvis);
while (count--) {
visualID = visualID << format;
visualID |= _XcmsGetElement(format, &pChar, &nitems);
}
if (vinfo_ret != NULL) {
printf
("\n\tVisualID: 0x%lx class: %s depth: %d bits_per_rgb: %d\n",
visualID, visual_strings[vinfo_ret->class],
vinfo_ret->depth, vinfo_ret->bits_per_rgb);
}
else
printf ("\n\tVisualID: 0x%lx\n", visualID);
XFree(vinfo_ret);
cType = _XcmsGetElement(format, &pChar, &nitems);
printf ("\ttype: %d\n", cType);
nTables = _XcmsGetElement(format, &pChar, &nitems);
printf ("\tcount: %d\n", nTables);
switch (cType) {
case 0:
/* Red Table should always exist */
printf ("\tRed Conversion Table:\n");
PrintTableType0(format, &pChar, &nitems);
if (nTables > 1) {
printf ("\tGreen Conversion Table:\n");
PrintTableType0(format, &pChar, &nitems);
printf ("\tBlue Conversion Table:\n");
PrintTableType0(format, &pChar, &nitems);
}
break;
case 1:
/* Red Table should always exist */
printf ("\tRed Conversion Table:\n");
PrintTableType1(format, &pChar, &nitems);
if (nTables > 1) {
printf ("\tGreen Conversion Table:\n");
PrintTableType1(format, &pChar, &nitems);
printf ("\tBlue Conversion Table:\n");
PrintTableType1(format, &pChar, &nitems);
}
break;
default:
goto IntensityTblError;
}
}
static void sendOSC_sendtyped(t_sendOSC *x, t_symbol *s, int argc, t_atom *argv)
{
char messageName[MAXPDSTRING];
// char *token;
typedArg args[MAX_ARGS];
int i;
messageName[0] = '\0'; // empty
if(argc>MAX_ARGS)
{
post ("sendOSC: too many arguments! (max: %d)", MAX_ARGS);
return;
}
// this sock needs to be larger than 0, not >= ..
if (x->x_htmsocket > 0)
{
#ifdef DEBUG
post ("sendOSC: type tags? %d", useTypeTags);
#endif
atom_string(&argv[0], messageName, MAXPDSTRING);
// messageName = strtok(targv[0], ",");
for (i = 0; i < argc-1; i++)
{
// token = strtok(targv[i],",");
args[i] = ParseAtom(&argv[i+1]);
#ifdef DEBUG
switch (args[i].type)
{
case INT_osc:
printf("cell-cont: %d\n", args[i].datum.i);
break;
case FLOAT_osc:
printf("cell-cont: %f\n", args[i].datum.f);
break;
case STRING_osc:
printf("cell-cont: %s\n", args[i].datum.s);
break;
case NOTYPE_osc:
printf("unknown type\n");
break;
}
printf(" type-id: %d\n", args[i].type);
#endif
}
if(WriteMessage(x->x_oscbuf, messageName, i, args))
{
post("sendOSC: usage error, write-msg failed: %s", OSC_errorMessage);
return;
}
if(!x->x_bundle)
{
SendBuffer(x->x_htmsocket, x->x_oscbuf);
OSC_initBuffer(x->x_oscbuf, SC_BUFFER_SIZE, bufferForOSCbuf);
}
}
else post("sendOSC: not connected");
}
struct Expression* ParseRepeatedExpression(const RegexpTokenType* token_stream, int* pos) {
struct Expression * atom = NULL;
int origpos = *pos;
int is_greedy = 1;
int lower_bound, upper_bound;
atom = ParseAtom(token_stream, pos);
if (atom == NULL) { /* All RepeatedExpression terms start with Atom */
goto parse_error;
}
switch (token_stream[*pos]) {
case ZERO_OR_MORE: lower_bound = 0; upper_bound = INFINITY; (*pos)++; break;
case ONE_OR_MORE: lower_bound = 1; upper_bound = INFINITY; (*pos)++; break;
case ZERO_OR_ONE: lower_bound = 0; upper_bound = 1; (*pos)++; break;
case REPEAT_OPEN: {
int i, upper_bound_pos;
/* Validity check */
for(i=*pos + 1; token_stream[i] != REPEAT_COMMA && token_stream[i] != REPEAT_CLOSE; i++) {
if (!isdigit(token_stream[i])) /* including == 0 */
goto parse_error;
}
if (token_stream[i] == REPEAT_CLOSE) {
upper_bound_pos = *pos + 1;
} else {
upper_bound_pos = i + 1;
for(i++; token_stream[i] != REPEAT_CLOSE; i++) {
if (!isdigit(token_stream[i])) /* including == 0 */
goto parse_error;
}
}
lower_bound = tokens_to_nat(token_stream + *pos + 1);
if (lower_bound == -1) {
goto parse_error;
}
if (token_stream[upper_bound_pos] == REPEAT_CLOSE) {
upper_bound = INFINITY;
} else {
upper_bound = tokens_to_nat(token_stream + upper_bound_pos);
if (upper_bound == -1 || upper_bound < lower_bound) {
goto parse_error;
}
}
(*pos) = i + 1;
break;
}
default:
/* RepeatedExpression := Atom */
return atom;
}
/* Check for nongreedy mark */
if (token_stream[*pos] == NONGREEDY_MARK) {
is_greedy = 0;
(*pos)++;
}
/* All other RepeatedExpression rules */
{
struct RepeatedExpression* result =
malloc(sizeof(struct RepeatedExpression));
result->base.typecode = REPEATED_EXPRESSION_TYPE;
result->base.group_number = NO_GROUP;
result->expression_repeated = atom;
result->lower_bound = lower_bound;
result->upper_bound = upper_bound;
result->is_greedy = is_greedy;
return (struct Expression*)result;
}
parse_error:
if (atom != NULL) destroy_expression(atom);
*pos = origpos;
return NULL;
}
void DwRfc1521Tokenizer::ParseToken()
{
// Assume the field body has already been extracted. That is, we don't
// have to watch for the end of the field body or folding. We just
// treat any CRs or LFs as white space.
mTokenStart = mNextStart;
mTokenLength = 0;
mTkType = eTkNull;
// Skip leading space. Also, since control chars are not permitted
// in atoms, skip these, too.
while(1)
{
if(mTokenStart >= mString.length())
{
return;
}
if(isnotspaceorcntrl(mString[mTokenStart]))
break;
++mTokenStart;
}
char ch = mString[mTokenStart];
switch(ch)
{
// Quoted string
case '"':
mTkType = eTkQuotedString;
ParseQuotedString();
break;
// Comment
case '(':
mTkType = eTkComment;
ParseComment();
break;
// Domain literal
case '[':
mTkType = eTkDomainLiteral;
ParseDomainLiteral();
break;
// Special
case ')':
case '<':
case '>':
case '@':
case ',':
case ';':
case ':':
case '\\':
case '/':
case ']':
case '?':
case '=':
mTkType = eTkTspecial;
mTokenLength = 1;
mToken = mString.substr(mTokenStart, 1);
mNextStart = mTokenStart + 1;
break;
default:
mTkType = eTkToken;
ParseAtom();
break;
}
if(mDebugOut) PrintToken(mDebugOut);
}
void*
NewJulie(
Symbol* ,
short iArgC,
Atom* iArgV)
{
tJulie* me = NIL;
double z0Real = 0.0,
z0Imag = 0.0,
cReal = 0.0,
cImag = 0.0;
// Take all initialization arguments as passed to us.
// This is a little dull for the Julia set, but there is no "natural" alternative
switch (iArgC) {
default:
error("%s: ignoring spurious arguments", kClassName);
// fall into next case...
case 4:
if ( ParseAtom(iArgV + 3, false, true, 0, NIL, kClassName) )
cImag = iArgV[3].a_w.w_float;
// fall into next case...
case 3:
if ( ParseAtom(iArgV + 2, false, true, 0, NIL, kClassName) )
cReal = iArgV[2].a_w.w_float;
// fall into next case...
case 2:
if ( ParseAtom(iArgV + 1, false, true, 0, NIL, kClassName) )
z0Imag = iArgV[1].a_w.w_float;
// fall into next case...
case 1:
if ( ParseAtom(iArgV, false, true, 0, NIL, kClassName) )
z0Real = iArgV[0].a_w.w_float;
// fall into next case...
case 0:
break;
}
// Let Max/MSP allocate us, our inlets, and outlets.
me = (tJulie*) newobject(gObjectClass);
if (me == NIL) goto punt;
dsp_setup(&(me->coreObject), 4); // All four inlets accept signal vectors
outlet_new(me, "signal"); // Two outlets (for real and imaginary
outlet_new(me, "signal"); // components of Julia set elements)
//
// Store initial values
//
me->zReal = me->z0Real
= z0Real;
me->zImag = me->z0Imag
= z0Imag;
me->cReal = cReal;
me->cImag = cImag;
//
// All done
//
punt:
return me;
}
static void ParseAtom( int startOffset, int stopOffset, qtmovie_t* qtmovie )
{
long currentOffset;
int containerAtom;
int atomSize;
unsigned int atomName;
char atomHeader[ 10 ];
if ( g_StopParsing )
return;
currentOffset = startOffset;
while ( currentOffset < stopOffset)
{
// Seek to the atom header
stream_seek( qtmovie->stream, currentOffset, SEEK_SET );
memset( atomHeader, 0, 10 );
// Read it in.. we only want the atom name & size.. they're always there..
stream_read( qtmovie->stream, 8, atomHeader );
// Now pull out the bits we need..
atomSize = ReadUnsignedInt( &atomHeader[ 0 ] );
atomName = ReadUnsignedInt( &atomHeader[ 4 ] );
// See if it's a container atom.. if it is, then recursively call ParseAtom on it...
for ( containerAtom = 0; containerAtom < ( sizeof( g_ContainerAtoms ) / sizeof( unsigned int ) ); containerAtom++ )
{
if ( atomName == g_ContainerAtoms[ containerAtom ] )
{
ParseAtom( stream_tell( qtmovie->stream ), currentOffset + atomSize, qtmovie );
break;
}
}
if ( atomName == g_FtypAtomName )
{
void* pAtomData = GetAtomData( qtmovie, atomSize );
ProcessFtypAtom( pAtomData, qtmovie );
FreeAtomData( pAtomData );
}
else
if ( atomName == g_StsdAtomName )
{
void* pAtomData = GetAtomData( qtmovie, atomSize );
ProcessStsdAtom( pAtomData, qtmovie );
FreeAtomData( pAtomData );
}
else
if ( atomName == g_SttsAtomName )
{
void* pAtomData = GetAtomData( qtmovie, atomSize );
ProcessSttsAtom( pAtomData, qtmovie );
FreeAtomData( pAtomData );
}
else
if ( atomName == g_StszAtomName )
{
void* pAtomData = GetAtomData( qtmovie, atomSize );
ProcessStszAtom( pAtomData, qtmovie );
FreeAtomData( pAtomData );
}
else
if ( atomName == g_MdatAtomName )
{
g_FoundMdatAtom = 1;
g_StopParsing = 1;
}
// If we've got a zero sized atom, then it's all over.. force the offset to trigger a stop.
if ( atomSize == 0 )
currentOffset = stopOffset;
else
currentOffset += atomSize;
}
// Everything seems to have gone ok...
return;
}
// Atom ::= "(" Expression ")" | "[" [^] Range "]" | Characters
Instruction* ParseAtom(const char **ppc, ParseInfo &info)
{
Instruction *i = 0;
const char *pc = *ppc;
switch (*pc)
{
case '(':
{
Group::TriState dnl = Group::Inherit;
Group::TriState nc = Group::Inherit;
Group::TriState ml = Group::Inherit;
bool capture = true;
bool consume = true;
bool invert = false;
bool reverse = false;
std::string name = "";
++pc;
if (*pc == '?')
{
++pc;
if (*pc == '#')
{
// skip everything until ) and from behave as if ParseAtom was
// called starting next character
++pc;
while (*pc != ')')
{
if (*pc == '\0')
{
return 0;
}
++pc;
}
*ppc = ++pc;
return ParseAtom(ppc, info);
}
if (*pc == ':')
{
capture = false;
++pc;
}
else if (*pc == '(')
{
// conditional
++pc;
std::string cond;
while (*pc != ')')
{
if (*pc == '\0')
{
return 0;
}
cond.push_back(*pc);
++pc;
}
++pc;
Instruction *ci = ParseExpression(&pc, info);
if (!ci || *pc != ')')
{
if (ci)
{
delete ci;
}
return 0;
}
++pc;
Alternative *alt = dynamic_cast<Alternative*>(ci);
Instruction *ifTrue, *ifFalse;
if (alt == 0)
{
ifTrue = ci;
ifFalse = 0;
}
else
{
ifTrue = alt->first()->clone();
ifFalse = alt->second()->clone();
delete alt;
}
*ppc = pc;
int index = 0;
if (sscanf(cond.c_str(), "%d", &index) != 1)
{
return new Conditional(cond, ifTrue, ifFalse);
}
else
{
return new Conditional(index, ifTrue, ifFalse);
}
}
else if (*pc == 'P')
{
++pc;
if (*pc == '<')
{
++pc;
while (*pc != '>')
{
if (*pc == '\0')
{
return 0;
}
name.push_back(*pc);
++pc;
}
++pc;
}
else if (*pc == '=')
{
std::string name;
++pc;
while (*pc != ')')
{
if (*pc == '\0')
{
return 0;
}
name.push_back(*pc);
++pc;
}
++pc;
*ppc = pc;
return new Backsubst(name);
}
else
{
return 0;
}
}
else if (*pc == '=')
{
// positive lookahead
capture = false;
consume = false;
++pc;
}
else if (*pc == '!')
{
// negative lookahead
capture = false;
consume = false;
invert = true;
++pc;
}
else if (*pc == '<')
{
++pc;
if (*pc == '=')
{
// positive lookbehind
capture = false;
consume = false;
reverse = true;
++pc;
}
else if (*pc == '!')
{
// negative lookbehind
capture = false;
consume = false;
reverse = true;
invert = true;
++pc;
}
else
{
Log::PrintError("[gcore] rex/ParseAtom: Invalid group format");
return 0;
}
}
else if (*pc == 'i' || *pc == 'm' || *pc == 's' || *pc == '-')
{
//capture = false;
//consume = false;
if (*pc == 'i')
{
// case sensitive off
nc = Group::On;
++pc;
}
if (*pc == 'm')
{
// multiline on (. matches \r\n)
ml = Group::On;
++pc;
}
if (*pc == 's')
{
// dot matches new line on
dnl = Group::On;
++pc;
}
if (*pc == '-')
{
++pc;
if (*pc == 'i')
{
// case sensitive on
nc = Group::Off;
++pc;
}
if (*pc == 'm')
{
// multiline off
ml = Group::Off;
++pc;
}
if (*pc == 's')
{
// dot matches newline off
dnl = Group::Off;
++pc;
}
}
if (*pc != ':' && *pc != ')')
{
// either followed by : or group end (meaning we just want to change exp exec flags)
Log::PrintError("[gcore] rex/ParseAtom: Invalid group format");
return 0;
}
if (*pc == ':')
{
++pc;
// would having a closing parent here be problematic
}
else
{
capture = false;
consume = false;
}
}
}
int gidx = (capture ? (++(info.numGroups)) : -1);
unsigned short flags = (unsigned short)(reverse ? Rex::Reverse : 0);
if (*pc != ')')
{
i = ParseExpression(&pc, info);
}
if (*pc != ')')
{
if (i)
{
delete i;
}
return 0;
}
#ifdef _DEBUG_REX
Log::PrintDebug("[gcore] rex/ParseAtom: Create group");
Log::SetIndentLevel(Log::GetIndentLevel()+1);
Log::PrintDebug("index: %d", gidx);
Log::PrintDebug("invert: %d", invert);
Log::PrintDebug("consume: %d", consume);
Log::PrintDebug("flags: %d", flags);
Log::PrintDebug("nc: %d", nc);
Log::PrintDebug("ml: %d", ml);
Log::PrintDebug("dnl: %d", dnl);
Log::PrintDebug("name: %d", name.c_str());
Log::PrintDebug("code: ");
if (i)
{
std::ostringstream oss;
Log::SetIndentLevel(Log::GetIndentLevel()+1)
i->toStream(oss);
Log::PrintDebug(oss.str().c_str());
Log::SetIndentLevel(Log::GetIndentLevel()-1)
}
Log::SetIndentLevel(Log::GetIndentLevel()-1);
#endif
i = new Group(gidx, i, !consume, invert, flags, nc, ml, dnl, name);
#ifdef _DEBUG_REX
Log::PrintDebug("[gcore] rex/ParseAtom: Group created");
#endif
++pc;
break;
}
case '[':
{
bool inv = false;
++pc;
if (*pc == '^')
{
inv = true;
++pc;
}
i = ParseRange(&pc, inv, info);
if (!i)
{
return 0;
}
if (*pc != ']')
{
Log::PrintError("[gcore] rex/ParseAtom: Invalid character '%c' in expression, expected ']'", *pc);
if (i)
{
delete i;
}
return 0;
}
++pc;
break;
}
default:
i = ParseCharacters(&pc, info);
if (!i)
{
i = ParseZerowidth(&pc, info);
if (!i)
{
return 0;
}
}
}
*ppc = pc;
return i;
}
