code/trunk/pcreposix.c

/*************************************************
*      Perl-Compatible Regular Expressions       *
*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel
           Copyright (c) 1997-2007 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/


/* This module is a wrapper that provides a POSIX API to the underlying PCRE
functions. */


#include "pcre_internal.h"
#include "pcreposix.h"
#include "stdlib.h"


/* Table to translate PCRE compile time error codes into POSIX error codes. */

static const int eint[] = {
  0,           /* no error */
  REG_EESCAPE, /* \ at end of pattern */
  REG_EESCAPE, /* \c at end of pattern */
  REG_EESCAPE, /* unrecognized character follows \ */
  REG_BADBR,   /* numbers out of order in {} quantifier */
  REG_BADBR,   /* number too big in {} quantifier */
  REG_EBRACK,  /* missing terminating ] for character class */
  REG_ECTYPE,  /* invalid escape sequence in character class */
  REG_ERANGE,  /* range out of order in character class */
  REG_BADRPT,  /* nothing to repeat */
  REG_BADRPT,  /* operand of unlimited repeat could match the empty string */
  REG_ASSERT,  /* internal error: unexpected repeat */
  REG_BADPAT,  /* unrecognized character after (? */
  REG_BADPAT,  /* POSIX named classes are supported only within a class */
  REG_EPAREN,  /* missing ) */
  REG_ESUBREG, /* reference to non-existent subpattern */
  REG_INVARG,  /* erroffset passed as NULL */
  REG_INVARG,  /* unknown option bit(s) set */
  REG_EPAREN,  /* missing ) after comment */
  REG_ESIZE,   /* parentheses nested too deeply */
  REG_ESIZE,   /* regular expression too large */
  REG_ESPACE,  /* failed to get memory */
  REG_EPAREN,  /* unmatched brackets */
  REG_ASSERT,  /* internal error: code overflow */
  REG_BADPAT,  /* unrecognized character after (?< */
  REG_BADPAT,  /* lookbehind assertion is not fixed length */
  REG_BADPAT,  /* malformed number or name after (?( */
  REG_BADPAT,  /* conditional group contains more than two branches */
  REG_BADPAT,  /* assertion expected after (?( */
  REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
  REG_ECTYPE,  /* unknown POSIX class name */
  REG_BADPAT,  /* POSIX collating elements are not supported */
  REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UTF8 support */
  REG_BADPAT,  /* spare error */
  REG_BADPAT,  /* character value in \x{...} sequence is too large */
  REG_BADPAT,  /* invalid condition (?(0) */
  REG_BADPAT,  /* \C not allowed in lookbehind assertion */
  REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
  REG_BADPAT,  /* number after (?C is > 255 */
  REG_BADPAT,  /* closing ) for (?C expected */
  REG_BADPAT,  /* recursive call could loop indefinitely */
  REG_BADPAT,  /* unrecognized character after (?P */
  REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
  REG_BADPAT,  /* two named subpatterns have the same name */
  REG_BADPAT,  /* invalid UTF-8 string */
  REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
  REG_BADPAT,  /* malformed \P or \p sequence */
  REG_BADPAT,  /* unknown property name after \P or \p */
  REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */
  REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */
  REG_BADPAT,  /* repeated subpattern is too long */
  REG_BADPAT,  /* octal value is greater than \377 (not in UTF-8 mode) */
  REG_BADPAT,  /* internal error: overran compiling workspace */
  REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */
  REG_BADPAT,  /* DEFINE group contains more than one branch */
  REG_BADPAT,  /* repeating a DEFINE group is not allowed */
  REG_INVARG,  /* inconsistent NEWLINE options */
  REG_BADPAT,  /* \g is not followed followed by an (optionally braced) non-zero number */
  REG_BADPAT   /* (?+ or (?- must be followed by a non-zero number */
};

/* Table of texts corresponding to POSIX error codes */

static const char *const pstring[] = {
  "",                                /* Dummy for value 0 */
  "internal error",                  /* REG_ASSERT */
  "invalid repeat counts in {}",     /* BADBR      */
  "pattern error",                   /* BADPAT     */
  "? * + invalid",                   /* BADRPT     */
  "unbalanced {}",                   /* EBRACE     */
  "unbalanced []",                   /* EBRACK     */
  "collation error - not relevant",  /* ECOLLATE   */
  "bad class",                       /* ECTYPE     */
  "bad escape sequence",             /* EESCAPE    */
  "empty expression",                /* EMPTY      */
  "unbalanced ()",                   /* EPAREN     */
  "bad range inside []",             /* ERANGE     */
  "expression too big",              /* ESIZE      */
  "failed to get memory",            /* ESPACE     */
  "bad back reference",              /* ESUBREG    */
  "bad argument",                    /* INVARG     */
  "match failed"                     /* NOMATCH    */
};


/*************************************************
*          Translate error code to string        *
*************************************************/

PCREPOSIX_EXP_DEFN size_t
regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
{
const char *message, *addmessage;
size_t length, addlength;

message = (errcode >= (int)(sizeof(pstring)/sizeof(char *)))?
  "unknown error code" : pstring[errcode];
length = strlen(message) + 1;

addmessage = " at offset ";
addlength = (preg != NULL && (int)preg->re_erroffset != -1)?
  strlen(addmessage) + 6 : 0;

if (errbuf_size > 0)
  {
  if (addlength > 0 && errbuf_size >= length + addlength)
    sprintf(errbuf, "%s%s%-6d", message, addmessage, (int)preg->re_erroffset);
  else
    {
    strncpy(errbuf, message, errbuf_size - 1);
    errbuf[errbuf_size-1] = 0;
    }
  }

return length + addlength;
}


/*************************************************
*           Free store held by a regex           *
*************************************************/

PCREPOSIX_EXP_DEFN void
regfree(regex_t *preg)
{
(pcre_free)(preg->re_pcre);
}


/*************************************************
*            Compile a regular expression        *
*************************************************/

/*
Arguments:
  preg        points to a structure for recording the compiled expression
  pattern     the pattern to compile
  cflags      compilation flags

Returns:      0 on success
              various non-zero codes on failure
*/

PCREPOSIX_EXP_DEFN int
regcomp(regex_t *preg, const char *pattern, int cflags)
{
const char *errorptr;
int erroffset;
int errorcode;
int options = 0;

if ((cflags & REG_ICASE) != 0)   options |= PCRE_CASELESS;
if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;
if ((cflags & REG_DOTALL) != 0)  options |= PCRE_DOTALL;
if ((cflags & REG_NOSUB) != 0)   options |= PCRE_NO_AUTO_CAPTURE;
if ((cflags & REG_UTF8) != 0)    options |= PCRE_UTF8;

preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
  &erroffset, NULL);
preg->re_erroffset = erroffset;

if (preg->re_pcre == NULL) return eint[errorcode];

preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
return 0;
}


/*************************************************
*              Match a regular expression        *
*************************************************/

/* Unfortunately, PCRE requires 3 ints of working space for each captured
substring, so we have to get and release working store instead of just using
the POSIX structures as was done in earlier releases when PCRE needed only 2
ints. However, if the number of possible capturing brackets is small, use a
block of store on the stack, to reduce the use of malloc/free. The threshold is
in a macro that can be changed at configure time.

If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
be set. When this is the case, the nmatch and pmatch arguments are ignored, and
the only result is yes/no/error. */

PCREPOSIX_EXP_DEFN int
regexec(const regex_t *preg, const char *string, size_t nmatch,
  regmatch_t pmatch[], int eflags)
{
int rc;
int options = 0;
int *ovector = NULL;
int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
BOOL allocated_ovector = FALSE;
BOOL nosub =
  (((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;

if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;

((regex_t *)preg)->re_erroffset = (size_t)(-1);  /* Only has meaning after compile */

/* When no string data is being returned, ensure that nmatch is zero.
Otherwise, ensure the vector for holding the return data is large enough. */

if (nosub) nmatch = 0;

else if (nmatch > 0)
  {
  if (nmatch <= POSIX_MALLOC_THRESHOLD)
    {
    ovector = &(small_ovector[0]);
    }
  else
    {
    if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
    ovector = (int *)malloc(sizeof(int) * nmatch * 3);
    if (ovector == NULL) return REG_ESPACE;
    allocated_ovector = TRUE;
    }
  }

rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),
  0, options, ovector, nmatch * 3);

if (rc == 0) rc = nmatch;    /* All captured slots were filled in */

if (rc >= 0)
  {
  size_t i;
  if (!nosub)
    {
    for (i = 0; i < (size_t)rc; i++)
      {
      pmatch[i].rm_so = ovector[i*2];
      pmatch[i].rm_eo = ovector[i*2+1];
      }
    if (allocated_ovector) free(ovector);
    for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
    }
  return 0;
  }

else
  {
  if (allocated_ovector) free(ovector);
  switch(rc)
    {
    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
    case PCRE_ERROR_NULL: return REG_INVARG;
    case PCRE_ERROR_BADOPTION: return REG_INVARG;
    case PCRE_ERROR_BADMAGIC: return REG_INVARG;
    case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
    case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
    case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
    case PCRE_ERROR_BADUTF8: return REG_INVARG;
    case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
    default: return REG_ASSERT;
    }
  }
}

/* End of pcreposix.c */
1	nigel	3	/*************************************************
2			* Perl-Compatible Regular Expressions *
3			*************************************************/
4
5	nigel	77	/* PCRE is a library of functions to support regular expressions whose syntax
6			and semantics are as close as possible to those of the Perl 5 language.
7	nigel	3
8	nigel	77	Written by Philip Hazel
9	ph10	117	Copyright (c) 1997-2007 University of Cambridge
10	nigel	3
11			-----------------------------------------------------------------------------
12	nigel	75	Redistribution and use in source and binary forms, with or without
13			modification, are permitted provided that the following conditions are met:
14	nigel	3
15	nigel	75	* Redistributions of source code must retain the above copyright notice,
16			this list of conditions and the following disclaimer.
17	nigel	3
18	nigel	75	* Redistributions in binary form must reproduce the above copyright
19			notice, this list of conditions and the following disclaimer in the
20			documentation and/or other materials provided with the distribution.
21	nigel	3
22	nigel	75	* Neither the name of the University of Cambridge nor the names of its
23			contributors may be used to endorse or promote products derived from
24			this software without specific prior written permission.
25	nigel	29
26	nigel	75	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27			AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28			IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29			ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30			LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31			CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32			SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33			INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34			CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35			ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36			POSSIBILITY OF SUCH DAMAGE.
37	nigel	3	-----------------------------------------------------------------------------
38			*/
39
40	nigel	77
41			/* This module is a wrapper that provides a POSIX API to the underlying PCRE
42			functions. */
43
44
45			#include "pcre_internal.h"
46	nigel	3	#include "pcreposix.h"
47			#include "stdlib.h"
48
49
50
51	nigel	77	/* Table to translate PCRE compile time error codes into POSIX error codes. */
52	nigel	3
53	nigel	73	static const int eint[] = {
54	nigel	77	0, /* no error */
55			REG_EESCAPE, /* \ at end of pattern */
56			REG_EESCAPE, /* \c at end of pattern */
57			REG_EESCAPE, /* unrecognized character follows \ */
58			REG_BADBR, /* numbers out of order in {} quantifier */
59			REG_BADBR, /* number too big in {} quantifier */
60			REG_EBRACK, /* missing terminating ] for character class */
61			REG_ECTYPE, /* invalid escape sequence in character class */
62			REG_ERANGE, /* range out of order in character class */
63			REG_BADRPT, /* nothing to repeat */
64			REG_BADRPT, /* operand of unlimited repeat could match the empty string */
65			REG_ASSERT, /* internal error: unexpected repeat */
66			REG_BADPAT, /* unrecognized character after (? */
67			REG_BADPAT, /* POSIX named classes are supported only within a class */
68			REG_EPAREN, /* missing ) */
69			REG_ESUBREG, /* reference to non-existent subpattern */
70			REG_INVARG, /* erroffset passed as NULL */
71			REG_INVARG, /* unknown option bit(s) set */
72			REG_EPAREN, /* missing ) after comment */
73			REG_ESIZE, /* parentheses nested too deeply */
74			REG_ESIZE, /* regular expression too large */
75			REG_ESPACE, /* failed to get memory */
76			REG_EPAREN, /* unmatched brackets */
77			REG_ASSERT, /* internal error: code overflow */
78			REG_BADPAT, /* unrecognized character after (?< */
79			REG_BADPAT, /* lookbehind assertion is not fixed length */
80	nigel	91	REG_BADPAT, /* malformed number or name after (?( */
81	nigel	93	REG_BADPAT, /* conditional group contains more than two branches */
82	nigel	77	REG_BADPAT, /* assertion expected after (?( */
83	ph10	166	REG_BADPAT, /* (?R or (?[+-]digits must be followed by ) */
84	nigel	77	REG_ECTYPE, /* unknown POSIX class name */
85			REG_BADPAT, /* POSIX collating elements are not supported */
86			REG_INVARG, /* this version of PCRE is not compiled with PCRE_UTF8 support */
87			REG_BADPAT, /* spare error */
88			REG_BADPAT, /* character value in \x{...} sequence is too large */
89			REG_BADPAT, /* invalid condition (?(0) */
90			REG_BADPAT, /* \C not allowed in lookbehind assertion */
91			REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
92			REG_BADPAT, /* number after (?C is > 255 */
93			REG_BADPAT, /* closing ) for (?C expected */
94			REG_BADPAT, /* recursive call could loop indefinitely */
95			REG_BADPAT, /* unrecognized character after (?P */
96	nigel	93	REG_BADPAT, /* syntax error in subpattern name (missing terminator) */
97	nigel	91	REG_BADPAT, /* two named subpatterns have the same name */
98	nigel	77	REG_BADPAT, /* invalid UTF-8 string */
99			REG_BADPAT, /* support for \P, \p, and \X has not been compiled */
100			REG_BADPAT, /* malformed \P or \p sequence */
101	nigel	91	REG_BADPAT, /* unknown property name after \P or \p */
102			REG_BADPAT, /* subpattern name is too long (maximum 32 characters) */
103			REG_BADPAT, /* too many named subpatterns (maximum 10,000) */
104			REG_BADPAT, /* repeated subpattern is too long */
105	nigel	93	REG_BADPAT, /* octal value is greater than \377 (not in UTF-8 mode) */
106			REG_BADPAT, /* internal error: overran compiling workspace */
107			REG_BADPAT, /* internal error: previously-checked referenced subpattern not found */
108			REG_BADPAT, /* DEFINE group contains more than one branch */
109			REG_BADPAT, /* repeating a DEFINE group is not allowed */
110			REG_INVARG, /* inconsistent NEWLINE options */
111	ph10	166	REG_BADPAT, /* \g is not followed followed by an (optionally braced) non-zero number */
112			REG_BADPAT /* (?+ or (?- must be followed by a non-zero number */
113	nigel	3	};
114
115			/* Table of texts corresponding to POSIX error codes */
116
117	nigel	73	static const char *const pstring[] = {
118	nigel	3	"", /* Dummy for value 0 */
119			"internal error", /* REG_ASSERT */
120			"invalid repeat counts in {}", /* BADBR */
121			"pattern error", /* BADPAT */
122			"? * + invalid", /* BADRPT */
123			"unbalanced {}", /* EBRACE */
124			"unbalanced []", /* EBRACK */
125			"collation error - not relevant", /* ECOLLATE */
126			"bad class", /* ECTYPE */
127			"bad escape sequence", /* EESCAPE */
128			"empty expression", /* EMPTY */
129			"unbalanced ()", /* EPAREN */
130			"bad range inside []", /* ERANGE */
131			"expression too big", /* ESIZE */
132			"failed to get memory", /* ESPACE */
133			"bad back reference", /* ESUBREG */
134			"bad argument", /* INVARG */
135			"match failed" /* NOMATCH */
136			};
137
138
139
140
141			/*************************************************
142			* Translate error code to string *
143			*************************************************/
144
145	ph10	145	PCREPOSIX_EXP_DEFN size_t
146	nigel	3	regerror(int errcode, const regex_t preg, char errbuf, size_t errbuf_size)
147			{
148	nigel	7	const char message, addmessage;
149			size_t length, addlength;
150	nigel	3
151	nigel	7	message = (errcode >= (int)(sizeof(pstring)/sizeof(char *)))?
152	nigel	3	"unknown error code" : pstring[errcode];
153	nigel	7	length = strlen(message) + 1;
154	nigel	3
155	nigel	7	addmessage = " at offset ";
156			addlength = (preg != NULL && (int)preg->re_erroffset != -1)?
157			strlen(addmessage) + 6 : 0;
158	nigel	3
159			if (errbuf_size > 0)
160			{
161	nigel	7	if (addlength > 0 && errbuf_size >= length + addlength)
162	nigel	23	sprintf(errbuf, "%s%s%-6d", message, addmessage, (int)preg->re_erroffset);
163	nigel	3	else
164			{
165			strncpy(errbuf, message, errbuf_size - 1);
166			errbuf[errbuf_size-1] = 0;
167			}
168			}
169
170	nigel	7	return length + addlength;
171	nigel	3	}
172
173
174
175
176			/*************************************************
177			* Free store held by a regex *
178			*************************************************/
179
180	ph10	145	PCREPOSIX_EXP_DEFN void
181	nigel	3	regfree(regex_t *preg)
182			{
183			(pcre_free)(preg->re_pcre);
184			}
185
186
187
188
189			/*************************************************
190			* Compile a regular expression *
191			*************************************************/
192
193			/*
194			Arguments:
195			preg points to a structure for recording the compiled expression
196			pattern the pattern to compile
197			cflags compilation flags
198
199			Returns: 0 on success
200			various non-zero codes on failure
201			*/
202
203	ph10	145	PCREPOSIX_EXP_DEFN int
204	nigel	3	regcomp(regex_t preg, const char pattern, int cflags)
205			{
206	nigel	7	const char *errorptr;
207	nigel	3	int erroffset;
208	nigel	77	int errorcode;
209	nigel	3	int options = 0;
210
211	nigel	87	if ((cflags & REG_ICASE) != 0) options \|= PCRE_CASELESS;
212	nigel	3	if ((cflags & REG_NEWLINE) != 0) options \|= PCRE_MULTILINE;
213	nigel	87	if ((cflags & REG_DOTALL) != 0) options \|= PCRE_DOTALL;
214			if ((cflags & REG_NOSUB) != 0) options \|= PCRE_NO_AUTO_CAPTURE;
215			if ((cflags & REG_UTF8) != 0) options \|= PCRE_UTF8;
216	nigel	3
217	nigel	77	preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
218			&erroffset, NULL);
219	nigel	3	preg->re_erroffset = erroffset;
220
221	nigel	77	if (preg->re_pcre == NULL) return eint[errorcode];
222	nigel	3
223	nigel	71	preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
224	nigel	3	return 0;
225			}
226
227
228
229
230			/*************************************************
231			* Match a regular expression *
232			*************************************************/
233
234	nigel	41	/* Unfortunately, PCRE requires 3 ints of working space for each captured
235			substring, so we have to get and release working store instead of just using
236			the POSIX structures as was done in earlier releases when PCRE needed only 2
237	nigel	63	ints. However, if the number of possible capturing brackets is small, use a
238			block of store on the stack, to reduce the use of malloc/free. The threshold is
239	nigel	87	in a macro that can be changed at configure time.
240	nigel	41
241	nigel	87	If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
242			be set. When this is the case, the nmatch and pmatch arguments are ignored, and
243			the only result is yes/no/error. */
244
245	ph10	145	PCREPOSIX_EXP_DEFN int
246	nigel	69	regexec(const regex_t preg, const char string, size_t nmatch,
247	nigel	3	regmatch_t pmatch[], int eflags)
248			{
249			int rc;
250			int options = 0;
251	nigel	41	int *ovector = NULL;
252	nigel	63	int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
253			BOOL allocated_ovector = FALSE;
254	nigel	87	BOOL nosub =
255			(((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;
256	nigel	3
257			if ((eflags & REG_NOTBOL) != 0) options \|= PCRE_NOTBOL;
258			if ((eflags & REG_NOTEOL) != 0) options \|= PCRE_NOTEOL;
259
260	nigel	69	((regex_t )preg)->re_erroffset = (size_t)(-1); / Only has meaning after compile */
261	nigel	3
262	nigel	87	/* When no string data is being returned, ensure that nmatch is zero.
263			Otherwise, ensure the vector for holding the return data is large enough. */
264
265			if (nosub) nmatch = 0;
266
267			else if (nmatch > 0)
268	nigel	41	{
269	nigel	63	if (nmatch <= POSIX_MALLOC_THRESHOLD)
270			{
271			ovector = &(small_ovector[0]);
272			}
273			else
274			{
275	nigel	87	if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
276	nigel	63	ovector = (int )malloc(sizeof(int) nmatch * 3);
277			if (ovector == NULL) return REG_ESPACE;
278			allocated_ovector = TRUE;
279			}
280	nigel	41	}
281
282	nigel	71	rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),
283			0, options, ovector, nmatch * 3);
284	nigel	3
285	nigel	41	if (rc == 0) rc = nmatch; /* All captured slots were filled in */
286	nigel	3
287	nigel	41	if (rc >= 0)
288	nigel	3	{
289	nigel	7	size_t i;
290	nigel	87	if (!nosub)
291	nigel	41	{
292	nigel	87	for (i = 0; i < (size_t)rc; i++)
293			{
294			pmatch[i].rm_so = ovector[i*2];
295			pmatch[i].rm_eo = ovector[i*2+1];
296			}
297			if (allocated_ovector) free(ovector);
298			for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
299	nigel	41	}
300	nigel	3	return 0;
301			}
302
303	nigel	41	else
304	nigel	3	{
305	nigel	63	if (allocated_ovector) free(ovector);
306	nigel	41	switch(rc)
307			{
308			case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
309			case PCRE_ERROR_NULL: return REG_INVARG;
310			case PCRE_ERROR_BADOPTION: return REG_INVARG;
311			case PCRE_ERROR_BADMAGIC: return REG_INVARG;
312			case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
313			case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
314	nigel	73	case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
315			case PCRE_ERROR_BADUTF8: return REG_INVARG;
316			case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
317	nigel	41	default: return REG_ASSERT;
318			}
319	nigel	3	}
320			}
321
322			/* End of pcreposix.c */
Name	Value
svn:eol-style	native
svn:keywords	"Author Date Id Revision Url"