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xmlregexp.c
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xmlregexp.c
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/*
* regexp.c: generic and extensible Regular Expression engine
*
* Basically designed with the purpose of compiling regexps for
* the variety of validation/schemas mechanisms now available in
* XML related specifications these include:
* - XML-1.0 DTD validation
* - XML Schemas structure part 1
* - XML Schemas Datatypes part 2 especially Appendix F
* - RELAX-NG/TREX i.e. the counter proposal
*
* See Copyright for the status of this software.
*
* Daniel Veillard <[email protected]>
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_REGEXP_ENABLED
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <libxml/tree.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlregexp.h>
#include <libxml/xmlautomata.h>
#include <libxml/xmlunicode.h>
#include "private/error.h"
#include "private/regexp.h"
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t) -1)
#endif
#define MAX_PUSH 10000000
#ifdef ERROR
#undef ERROR
#endif
#define ERROR(str) \
ctxt->error = XML_REGEXP_COMPILE_ERROR; \
xmlRegexpErrCompile(ctxt, str);
#define NEXT ctxt->cur++
#define CUR (*(ctxt->cur))
#define NXT(index) (ctxt->cur[index])
#define NEXTL(l) ctxt->cur += l;
#define XML_REG_STRING_SEPARATOR '|'
/*
* Need PREV to check on a '-' within a Character Group. May only be used
* when it's guaranteed that cur is not at the beginning of ctxt->string!
*/
#define PREV (ctxt->cur[-1])
/************************************************************************
* *
* Datatypes and structures *
* *
************************************************************************/
/*
* Note: the order of the enums below is significant, do not shuffle
*/
typedef enum {
XML_REGEXP_EPSILON = 1,
XML_REGEXP_CHARVAL,
XML_REGEXP_RANGES,
XML_REGEXP_SUBREG, /* used for () sub regexps */
XML_REGEXP_STRING,
XML_REGEXP_ANYCHAR, /* . */
XML_REGEXP_ANYSPACE, /* \s */
XML_REGEXP_NOTSPACE, /* \S */
XML_REGEXP_INITNAME, /* \l */
XML_REGEXP_NOTINITNAME, /* \L */
XML_REGEXP_NAMECHAR, /* \c */
XML_REGEXP_NOTNAMECHAR, /* \C */
XML_REGEXP_DECIMAL, /* \d */
XML_REGEXP_NOTDECIMAL, /* \D */
XML_REGEXP_REALCHAR, /* \w */
XML_REGEXP_NOTREALCHAR, /* \W */
XML_REGEXP_LETTER = 100,
XML_REGEXP_LETTER_UPPERCASE,
XML_REGEXP_LETTER_LOWERCASE,
XML_REGEXP_LETTER_TITLECASE,
XML_REGEXP_LETTER_MODIFIER,
XML_REGEXP_LETTER_OTHERS,
XML_REGEXP_MARK,
XML_REGEXP_MARK_NONSPACING,
XML_REGEXP_MARK_SPACECOMBINING,
XML_REGEXP_MARK_ENCLOSING,
XML_REGEXP_NUMBER,
XML_REGEXP_NUMBER_DECIMAL,
XML_REGEXP_NUMBER_LETTER,
XML_REGEXP_NUMBER_OTHERS,
XML_REGEXP_PUNCT,
XML_REGEXP_PUNCT_CONNECTOR,
XML_REGEXP_PUNCT_DASH,
XML_REGEXP_PUNCT_OPEN,
XML_REGEXP_PUNCT_CLOSE,
XML_REGEXP_PUNCT_INITQUOTE,
XML_REGEXP_PUNCT_FINQUOTE,
XML_REGEXP_PUNCT_OTHERS,
XML_REGEXP_SEPAR,
XML_REGEXP_SEPAR_SPACE,
XML_REGEXP_SEPAR_LINE,
XML_REGEXP_SEPAR_PARA,
XML_REGEXP_SYMBOL,
XML_REGEXP_SYMBOL_MATH,
XML_REGEXP_SYMBOL_CURRENCY,
XML_REGEXP_SYMBOL_MODIFIER,
XML_REGEXP_SYMBOL_OTHERS,
XML_REGEXP_OTHER,
XML_REGEXP_OTHER_CONTROL,
XML_REGEXP_OTHER_FORMAT,
XML_REGEXP_OTHER_PRIVATE,
XML_REGEXP_OTHER_NA,
XML_REGEXP_BLOCK_NAME
} xmlRegAtomType;
typedef enum {
XML_REGEXP_QUANT_EPSILON = 1,
XML_REGEXP_QUANT_ONCE,
XML_REGEXP_QUANT_OPT,
XML_REGEXP_QUANT_MULT,
XML_REGEXP_QUANT_PLUS,
XML_REGEXP_QUANT_ONCEONLY,
XML_REGEXP_QUANT_ALL,
XML_REGEXP_QUANT_RANGE
} xmlRegQuantType;
typedef enum {
XML_REGEXP_START_STATE = 1,
XML_REGEXP_FINAL_STATE,
XML_REGEXP_TRANS_STATE,
XML_REGEXP_SINK_STATE,
XML_REGEXP_UNREACH_STATE
} xmlRegStateType;
typedef enum {
XML_REGEXP_MARK_NORMAL = 0,
XML_REGEXP_MARK_START,
XML_REGEXP_MARK_VISITED
} xmlRegMarkedType;
typedef struct _xmlRegRange xmlRegRange;
typedef xmlRegRange *xmlRegRangePtr;
struct _xmlRegRange {
int neg; /* 0 normal, 1 not, 2 exclude */
xmlRegAtomType type;
int start;
int end;
xmlChar *blockName;
};
typedef struct _xmlRegAtom xmlRegAtom;
typedef xmlRegAtom *xmlRegAtomPtr;
typedef struct _xmlAutomataState xmlRegState;
typedef xmlRegState *xmlRegStatePtr;
struct _xmlRegAtom {
int no;
xmlRegAtomType type;
xmlRegQuantType quant;
int min;
int max;
void *valuep;
void *valuep2;
int neg;
int codepoint;
xmlRegStatePtr start;
xmlRegStatePtr start0;
xmlRegStatePtr stop;
int maxRanges;
int nbRanges;
xmlRegRangePtr *ranges;
void *data;
};
typedef struct _xmlRegCounter xmlRegCounter;
typedef xmlRegCounter *xmlRegCounterPtr;
struct _xmlRegCounter {
int min;
int max;
};
typedef struct _xmlRegTrans xmlRegTrans;
typedef xmlRegTrans *xmlRegTransPtr;
struct _xmlRegTrans {
xmlRegAtomPtr atom;
int to;
int counter;
int count;
int nd;
};
struct _xmlAutomataState {
xmlRegStateType type;
xmlRegMarkedType mark;
xmlRegMarkedType markd;
xmlRegMarkedType reached;
int no;
int maxTrans;
int nbTrans;
xmlRegTrans *trans;
/* knowing states pointing to us can speed things up */
int maxTransTo;
int nbTransTo;
int *transTo;
};
typedef struct _xmlAutomata xmlRegParserCtxt;
typedef xmlRegParserCtxt *xmlRegParserCtxtPtr;
#define AM_AUTOMATA_RNG 1
struct _xmlAutomata {
xmlChar *string;
xmlChar *cur;
int error;
int neg;
xmlRegStatePtr start;
xmlRegStatePtr end;
xmlRegStatePtr state;
xmlRegAtomPtr atom;
int maxAtoms;
int nbAtoms;
xmlRegAtomPtr *atoms;
int maxStates;
int nbStates;
xmlRegStatePtr *states;
int maxCounters;
int nbCounters;
xmlRegCounter *counters;
int determinist;
int negs;
int flags;
int depth;
};
struct _xmlRegexp {
xmlChar *string;
int nbStates;
xmlRegStatePtr *states;
int nbAtoms;
xmlRegAtomPtr *atoms;
int nbCounters;
xmlRegCounter *counters;
int determinist;
int flags;
/*
* That's the compact form for determinists automatas
*/
int nbstates;
int *compact;
void **transdata;
int nbstrings;
xmlChar **stringMap;
};
typedef struct _xmlRegExecRollback xmlRegExecRollback;
typedef xmlRegExecRollback *xmlRegExecRollbackPtr;
struct _xmlRegExecRollback {
xmlRegStatePtr state;/* the current state */
int index; /* the index in the input stack */
int nextbranch; /* the next transition to explore in that state */
int *counts; /* save the automata state if it has some */
};
typedef struct _xmlRegInputToken xmlRegInputToken;
typedef xmlRegInputToken *xmlRegInputTokenPtr;
struct _xmlRegInputToken {
xmlChar *value;
void *data;
};
struct _xmlRegExecCtxt {
int status; /* execution status != 0 indicate an error */
int determinist; /* did we find an indeterministic behaviour */
xmlRegexpPtr comp; /* the compiled regexp */
xmlRegExecCallbacks callback;
void *data;
xmlRegStatePtr state;/* the current state */
int transno; /* the current transition on that state */
int transcount; /* the number of chars in char counted transitions */
/*
* A stack of rollback states
*/
int maxRollbacks;
int nbRollbacks;
xmlRegExecRollback *rollbacks;
/*
* The state of the automata if any
*/
int *counts;
/*
* The input stack
*/
int inputStackMax;
int inputStackNr;
int index;
int *charStack;
const xmlChar *inputString; /* when operating on characters */
xmlRegInputTokenPtr inputStack;/* when operating on strings */
/*
* error handling
*/
int errStateNo; /* the error state number */
xmlRegStatePtr errState; /* the error state */
xmlChar *errString; /* the string raising the error */
int *errCounts; /* counters at the error state */
int nbPush;
};
#define REGEXP_ALL_COUNTER 0x123456
#define REGEXP_ALL_LAX_COUNTER 0x123457
static void xmlFAParseRegExp(xmlRegParserCtxtPtr ctxt, int top);
static void xmlRegFreeState(xmlRegStatePtr state);
static void xmlRegFreeAtom(xmlRegAtomPtr atom);
static int xmlRegStrEqualWildcard(const xmlChar *expStr, const xmlChar *valStr);
static int xmlRegCheckCharacter(xmlRegAtomPtr atom, int codepoint);
static int xmlRegCheckCharacterRange(xmlRegAtomType type, int codepoint,
int neg, int start, int end, const xmlChar *blockName);
/************************************************************************
* *
* Regexp memory error handler *
* *
************************************************************************/
/**
* xmlRegexpErrMemory:
* @extra: extra information
*
* Handle an out of memory condition
*/
static void
xmlRegexpErrMemory(xmlRegParserCtxtPtr ctxt)
{
if (ctxt != NULL)
ctxt->error = XML_ERR_NO_MEMORY;
xmlRaiseMemoryError(NULL, NULL, NULL, XML_FROM_REGEXP, NULL);
}
/**
* xmlRegexpErrCompile:
* @extra: extra information
*
* Handle a compilation failure
*/
static void
xmlRegexpErrCompile(xmlRegParserCtxtPtr ctxt, const char *extra)
{
const char *regexp = NULL;
int idx = 0;
int res;
if (ctxt != NULL) {
regexp = (const char *) ctxt->string;
idx = ctxt->cur - ctxt->string;
ctxt->error = XML_REGEXP_COMPILE_ERROR;
}
res = xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_REGEXP,
XML_REGEXP_COMPILE_ERROR, XML_ERR_FATAL,
NULL, 0, extra, regexp, NULL, idx, 0,
"failed to compile: %s\n", extra);
if (res < 0)
xmlRegexpErrMemory(ctxt);
}
/************************************************************************
* *
* Allocation/Deallocation *
* *
************************************************************************/
static int xmlFAComputesDeterminism(xmlRegParserCtxtPtr ctxt);
/**
* xmlRegCalloc2:
* @dim1: size of first dimension
* @dim2: size of second dimension
* @elemSize: size of element
*
* Allocate a two-dimensional array and set all elements to zero.
*
* Returns the new array or NULL in case of error.
*/
static void*
xmlRegCalloc2(size_t dim1, size_t dim2, size_t elemSize) {
size_t totalSize;
void *ret;
/* Check for overflow */
if ((dim2 == 0) || (elemSize == 0) ||
(dim1 > SIZE_MAX / dim2 / elemSize))
return (NULL);
totalSize = dim1 * dim2 * elemSize;
ret = xmlMalloc(totalSize);
if (ret != NULL)
memset(ret, 0, totalSize);
return (ret);
}
/**
* xmlRegEpxFromParse:
* @ctxt: the parser context used to build it
*
* Allocate a new regexp and fill it with the result from the parser
*
* Returns the new regexp or NULL in case of error
*/
static xmlRegexpPtr
xmlRegEpxFromParse(xmlRegParserCtxtPtr ctxt) {
xmlRegexpPtr ret;
ret = (xmlRegexpPtr) xmlMalloc(sizeof(xmlRegexp));
if (ret == NULL) {
xmlRegexpErrMemory(ctxt);
return(NULL);
}
memset(ret, 0, sizeof(xmlRegexp));
ret->string = ctxt->string;
ret->nbStates = ctxt->nbStates;
ret->states = ctxt->states;
ret->nbAtoms = ctxt->nbAtoms;
ret->atoms = ctxt->atoms;
ret->nbCounters = ctxt->nbCounters;
ret->counters = ctxt->counters;
ret->determinist = ctxt->determinist;
ret->flags = ctxt->flags;
if (ret->determinist == -1) {
if (xmlRegexpIsDeterminist(ret) < 0) {
xmlRegexpErrMemory(ctxt);
xmlFree(ret);
return(NULL);
}
}
if ((ret->determinist != 0) &&
(ret->nbCounters == 0) &&
(ctxt->negs == 0) &&
(ret->atoms != NULL) &&
(ret->atoms[0] != NULL) &&
(ret->atoms[0]->type == XML_REGEXP_STRING)) {
int i, j, nbstates = 0, nbatoms = 0;
int *stateRemap;
int *stringRemap;
int *transitions;
void **transdata;
xmlChar **stringMap;
xmlChar *value;
/*
* Switch to a compact representation
* 1/ counting the effective number of states left
* 2/ counting the unique number of atoms, and check that
* they are all of the string type
* 3/ build a table state x atom for the transitions
*/
stateRemap = xmlMalloc(ret->nbStates * sizeof(int));
if (stateRemap == NULL) {
xmlRegexpErrMemory(ctxt);
xmlFree(ret);
return(NULL);
}
for (i = 0;i < ret->nbStates;i++) {
if (ret->states[i] != NULL) {
stateRemap[i] = nbstates;
nbstates++;
} else {
stateRemap[i] = -1;
}
}
stringMap = xmlMalloc(ret->nbAtoms * sizeof(char *));
if (stringMap == NULL) {
xmlRegexpErrMemory(ctxt);
xmlFree(stateRemap);
xmlFree(ret);
return(NULL);
}
stringRemap = xmlMalloc(ret->nbAtoms * sizeof(int));
if (stringRemap == NULL) {
xmlRegexpErrMemory(ctxt);
xmlFree(stringMap);
xmlFree(stateRemap);
xmlFree(ret);
return(NULL);
}
for (i = 0;i < ret->nbAtoms;i++) {
if ((ret->atoms[i]->type == XML_REGEXP_STRING) &&
(ret->atoms[i]->quant == XML_REGEXP_QUANT_ONCE)) {
value = ret->atoms[i]->valuep;
for (j = 0;j < nbatoms;j++) {
if (xmlStrEqual(stringMap[j], value)) {
stringRemap[i] = j;
break;
}
}
if (j >= nbatoms) {
stringRemap[i] = nbatoms;
stringMap[nbatoms] = xmlStrdup(value);
if (stringMap[nbatoms] == NULL) {
for (i = 0;i < nbatoms;i++)
xmlFree(stringMap[i]);
xmlFree(stringRemap);
xmlFree(stringMap);
xmlFree(stateRemap);
xmlFree(ret);
return(NULL);
}
nbatoms++;
}
} else {
xmlFree(stateRemap);
xmlFree(stringRemap);
for (i = 0;i < nbatoms;i++)
xmlFree(stringMap[i]);
xmlFree(stringMap);
xmlFree(ret);
return(NULL);
}
}
transitions = (int *) xmlRegCalloc2(nbstates + 1, nbatoms + 1,
sizeof(int));
if (transitions == NULL) {
xmlFree(stateRemap);
xmlFree(stringRemap);
for (i = 0;i < nbatoms;i++)
xmlFree(stringMap[i]);
xmlFree(stringMap);
xmlFree(ret);
return(NULL);
}
/*
* Allocate the transition table. The first entry for each
* state corresponds to the state type.
*/
transdata = NULL;
for (i = 0;i < ret->nbStates;i++) {
int stateno, atomno, targetno, prev;
xmlRegStatePtr state;
xmlRegTransPtr trans;
stateno = stateRemap[i];
if (stateno == -1)
continue;
state = ret->states[i];
transitions[stateno * (nbatoms + 1)] = state->type;
for (j = 0;j < state->nbTrans;j++) {
trans = &(state->trans[j]);
if ((trans->to < 0) || (trans->atom == NULL))
continue;
atomno = stringRemap[trans->atom->no];
if ((trans->atom->data != NULL) && (transdata == NULL)) {
transdata = (void **) xmlRegCalloc2(nbstates, nbatoms,
sizeof(void *));
if (transdata == NULL) {
xmlRegexpErrMemory(ctxt);
break;
}
}
targetno = stateRemap[trans->to];
/*
* if the same atom can generate transitions to 2 different
* states then it means the automata is not deterministic and
* the compact form can't be used !
*/
prev = transitions[stateno * (nbatoms + 1) + atomno + 1];
if (prev != 0) {
if (prev != targetno + 1) {
ret->determinist = 0;
if (transdata != NULL)
xmlFree(transdata);
xmlFree(transitions);
xmlFree(stateRemap);
xmlFree(stringRemap);
for (i = 0;i < nbatoms;i++)
xmlFree(stringMap[i]);
xmlFree(stringMap);
goto not_determ;
}
} else {
#if 0
printf("State %d trans %d: atom %d to %d : %d to %d\n",
i, j, trans->atom->no, trans->to, atomno, targetno);
#endif
transitions[stateno * (nbatoms + 1) + atomno + 1] =
targetno + 1; /* to avoid 0 */
if (transdata != NULL)
transdata[stateno * nbatoms + atomno] =
trans->atom->data;
}
}
}
ret->determinist = 1;
/*
* Cleanup of the old data
*/
if (ret->states != NULL) {
for (i = 0;i < ret->nbStates;i++)
xmlRegFreeState(ret->states[i]);
xmlFree(ret->states);
}
ret->states = NULL;
ret->nbStates = 0;
if (ret->atoms != NULL) {
for (i = 0;i < ret->nbAtoms;i++)
xmlRegFreeAtom(ret->atoms[i]);
xmlFree(ret->atoms);
}
ret->atoms = NULL;
ret->nbAtoms = 0;
ret->compact = transitions;
ret->transdata = transdata;
ret->stringMap = stringMap;
ret->nbstrings = nbatoms;
ret->nbstates = nbstates;
xmlFree(stateRemap);
xmlFree(stringRemap);
}
not_determ:
ctxt->string = NULL;
ctxt->nbStates = 0;
ctxt->states = NULL;
ctxt->nbAtoms = 0;
ctxt->atoms = NULL;
ctxt->nbCounters = 0;
ctxt->counters = NULL;
return(ret);
}
/**
* xmlRegNewParserCtxt:
* @string: the string to parse
*
* Allocate a new regexp parser context
*
* Returns the new context or NULL in case of error
*/
static xmlRegParserCtxtPtr
xmlRegNewParserCtxt(const xmlChar *string) {
xmlRegParserCtxtPtr ret;
ret = (xmlRegParserCtxtPtr) xmlMalloc(sizeof(xmlRegParserCtxt));
if (ret == NULL)
return(NULL);
memset(ret, 0, sizeof(xmlRegParserCtxt));
if (string != NULL) {
ret->string = xmlStrdup(string);
if (ret->string == NULL) {
xmlFree(ret);
return(NULL);
}
}
ret->cur = ret->string;
ret->neg = 0;
ret->negs = 0;
ret->error = 0;
ret->determinist = -1;
return(ret);
}
/**
* xmlRegNewRange:
* @ctxt: the regexp parser context
* @neg: is that negative
* @type: the type of range
* @start: the start codepoint
* @end: the end codepoint
*
* Allocate a new regexp range
*
* Returns the new range or NULL in case of error
*/
static xmlRegRangePtr
xmlRegNewRange(xmlRegParserCtxtPtr ctxt,
int neg, xmlRegAtomType type, int start, int end) {
xmlRegRangePtr ret;
ret = (xmlRegRangePtr) xmlMalloc(sizeof(xmlRegRange));
if (ret == NULL) {
xmlRegexpErrMemory(ctxt);
return(NULL);
}
ret->neg = neg;
ret->type = type;
ret->start = start;
ret->end = end;
return(ret);
}
/**
* xmlRegFreeRange:
* @range: the regexp range
*
* Free a regexp range
*/
static void
xmlRegFreeRange(xmlRegRangePtr range) {
if (range == NULL)
return;
if (range->blockName != NULL)
xmlFree(range->blockName);
xmlFree(range);
}
/**
* xmlRegCopyRange:
* @range: the regexp range
*
* Copy a regexp range
*
* Returns the new copy or NULL in case of error.
*/
static xmlRegRangePtr
xmlRegCopyRange(xmlRegParserCtxtPtr ctxt, xmlRegRangePtr range) {
xmlRegRangePtr ret;
if (range == NULL)
return(NULL);
ret = xmlRegNewRange(ctxt, range->neg, range->type, range->start,
range->end);
if (ret == NULL)
return(NULL);
if (range->blockName != NULL) {
ret->blockName = xmlStrdup(range->blockName);
if (ret->blockName == NULL) {
xmlRegexpErrMemory(ctxt);
xmlRegFreeRange(ret);
return(NULL);
}
}
return(ret);
}
/**
* xmlRegNewAtom:
* @ctxt: the regexp parser context
* @type: the type of atom
*
* Allocate a new atom
*
* Returns the new atom or NULL in case of error
*/
static xmlRegAtomPtr
xmlRegNewAtom(xmlRegParserCtxtPtr ctxt, xmlRegAtomType type) {
xmlRegAtomPtr ret;
ret = (xmlRegAtomPtr) xmlMalloc(sizeof(xmlRegAtom));
if (ret == NULL) {
xmlRegexpErrMemory(ctxt);
return(NULL);
}
memset(ret, 0, sizeof(xmlRegAtom));
ret->type = type;
ret->quant = XML_REGEXP_QUANT_ONCE;
ret->min = 0;
ret->max = 0;
return(ret);
}
/**
* xmlRegFreeAtom:
* @atom: the regexp atom
*
* Free a regexp atom
*/
static void
xmlRegFreeAtom(xmlRegAtomPtr atom) {
int i;
if (atom == NULL)
return;
for (i = 0;i < atom->nbRanges;i++)
xmlRegFreeRange(atom->ranges[i]);
if (atom->ranges != NULL)
xmlFree(atom->ranges);
if ((atom->type == XML_REGEXP_STRING) && (atom->valuep != NULL))
xmlFree(atom->valuep);
if ((atom->type == XML_REGEXP_STRING) && (atom->valuep2 != NULL))
xmlFree(atom->valuep2);
if ((atom->type == XML_REGEXP_BLOCK_NAME) && (atom->valuep != NULL))
xmlFree(atom->valuep);
xmlFree(atom);
}
/**
* xmlRegCopyAtom:
* @ctxt: the regexp parser context
* @atom: the original atom
*
* Allocate a new regexp range
*
* Returns the new atom or NULL in case of error
*/
static xmlRegAtomPtr
xmlRegCopyAtom(xmlRegParserCtxtPtr ctxt, xmlRegAtomPtr atom) {
xmlRegAtomPtr ret;
ret = (xmlRegAtomPtr) xmlMalloc(sizeof(xmlRegAtom));
if (ret == NULL) {
xmlRegexpErrMemory(ctxt);
return(NULL);
}
memset(ret, 0, sizeof(xmlRegAtom));
ret->type = atom->type;
ret->quant = atom->quant;
ret->min = atom->min;
ret->max = atom->max;
if (atom->nbRanges > 0) {
int i;
ret->ranges = (xmlRegRangePtr *) xmlMalloc(sizeof(xmlRegRangePtr) *
atom->nbRanges);
if (ret->ranges == NULL) {
xmlRegexpErrMemory(ctxt);
goto error;
}
for (i = 0;i < atom->nbRanges;i++) {
ret->ranges[i] = xmlRegCopyRange(ctxt, atom->ranges[i]);
if (ret->ranges[i] == NULL)
goto error;
ret->nbRanges = i + 1;
}
}
return(ret);
error:
xmlRegFreeAtom(ret);
return(NULL);
}
static xmlRegStatePtr
xmlRegNewState(xmlRegParserCtxtPtr ctxt) {
xmlRegStatePtr ret;
ret = (xmlRegStatePtr) xmlMalloc(sizeof(xmlRegState));
if (ret == NULL) {
xmlRegexpErrMemory(ctxt);
return(NULL);
}
memset(ret, 0, sizeof(xmlRegState));
ret->type = XML_REGEXP_TRANS_STATE;
ret->mark = XML_REGEXP_MARK_NORMAL;
return(ret);
}
/**
* xmlRegFreeState:
* @state: the regexp state
*
* Free a regexp state
*/
static void
xmlRegFreeState(xmlRegStatePtr state) {
if (state == NULL)
return;
if (state->trans != NULL)
xmlFree(state->trans);
if (state->transTo != NULL)
xmlFree(state->transTo);
xmlFree(state);
}
/**
* xmlRegFreeParserCtxt:
* @ctxt: the regexp parser context
*
* Free a regexp parser context
*/
static void
xmlRegFreeParserCtxt(xmlRegParserCtxtPtr ctxt) {
int i;
if (ctxt == NULL)
return;
if (ctxt->string != NULL)
xmlFree(ctxt->string);
if (ctxt->states != NULL) {
for (i = 0;i < ctxt->nbStates;i++)
xmlRegFreeState(ctxt->states[i]);
xmlFree(ctxt->states);
}
if (ctxt->atoms != NULL) {
for (i = 0;i < ctxt->nbAtoms;i++)
xmlRegFreeAtom(ctxt->atoms[i]);
xmlFree(ctxt->atoms);
}
if (ctxt->counters != NULL)
xmlFree(ctxt->counters);
xmlFree(ctxt);
}
/************************************************************************
* *
* Display of Data structures *
* *
************************************************************************/
static void
xmlRegPrintAtomType(FILE *output, xmlRegAtomType type) {
switch (type) {
case XML_REGEXP_EPSILON:
fprintf(output, "epsilon "); break;
case XML_REGEXP_CHARVAL:
fprintf(output, "charval "); break;
case XML_REGEXP_RANGES:
fprintf(output, "ranges "); break;
case XML_REGEXP_SUBREG:
fprintf(output, "subexpr "); break;
case XML_REGEXP_STRING:
fprintf(output, "string "); break;
case XML_REGEXP_ANYCHAR:
fprintf(output, "anychar "); break;
case XML_REGEXP_ANYSPACE:
fprintf(output, "anyspace "); break;
case XML_REGEXP_NOTSPACE:
fprintf(output, "notspace "); break;
case XML_REGEXP_INITNAME:
fprintf(output, "initname "); break;
case XML_REGEXP_NOTINITNAME:
fprintf(output, "notinitname "); break;
case XML_REGEXP_NAMECHAR:
fprintf(output, "namechar "); break;
case XML_REGEXP_NOTNAMECHAR:
fprintf(output, "notnamechar "); break;
case XML_REGEXP_DECIMAL:
fprintf(output, "decimal "); break;
case XML_REGEXP_NOTDECIMAL:
fprintf(output, "notdecimal "); break;
case XML_REGEXP_REALCHAR:
fprintf(output, "realchar "); break;
case XML_REGEXP_NOTREALCHAR:
fprintf(output, "notrealchar "); break;
case XML_REGEXP_LETTER:
fprintf(output, "LETTER "); break;
case XML_REGEXP_LETTER_UPPERCASE:
fprintf(output, "LETTER_UPPERCASE "); break;
case XML_REGEXP_LETTER_LOWERCASE:
fprintf(output, "LETTER_LOWERCASE "); break;
case XML_REGEXP_LETTER_TITLECASE:
fprintf(output, "LETTER_TITLECASE "); break;
case XML_REGEXP_LETTER_MODIFIER:
fprintf(output, "LETTER_MODIFIER "); break;
case XML_REGEXP_LETTER_OTHERS:
fprintf(output, "LETTER_OTHERS "); break;
case XML_REGEXP_MARK:
fprintf(output, "MARK "); break;
case XML_REGEXP_MARK_NONSPACING:
fprintf(output, "MARK_NONSPACING "); break;
case XML_REGEXP_MARK_SPACECOMBINING:
fprintf(output, "MARK_SPACECOMBINING "); break;
case XML_REGEXP_MARK_ENCLOSING:
fprintf(output, "MARK_ENCLOSING "); break;
case XML_REGEXP_NUMBER:
fprintf(output, "NUMBER "); break;
case XML_REGEXP_NUMBER_DECIMAL:
fprintf(output, "NUMBER_DECIMAL "); break;
case XML_REGEXP_NUMBER_LETTER:
fprintf(output, "NUMBER_LETTER "); break;
case XML_REGEXP_NUMBER_OTHERS:
fprintf(output, "NUMBER_OTHERS "); break;
case XML_REGEXP_PUNCT:
fprintf(output, "PUNCT "); break;