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 */
};

/* 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			REG_BADPAT, /* (?R or (?digits must be followed by ) */
84			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			REG_BADPAT /* \g is not followed followed by an (optionally braced) non-zero number */
112	nigel	3	};
113
114			/* Table of texts corresponding to POSIX error codes */
115
116	nigel	73	static const char *const pstring[] = {
117	nigel	3	"", /* Dummy for value 0 */
118			"internal error", /* REG_ASSERT */
119			"invalid repeat counts in {}", /* BADBR */
120			"pattern error", /* BADPAT */
121			"? * + invalid", /* BADRPT */
122			"unbalanced {}", /* EBRACE */
123			"unbalanced []", /* EBRACK */
124			"collation error - not relevant", /* ECOLLATE */
125			"bad class", /* ECTYPE */
126			"bad escape sequence", /* EESCAPE */
127			"empty expression", /* EMPTY */
128			"unbalanced ()", /* EPAREN */
129			"bad range inside []", /* ERANGE */
130			"expression too big", /* ESIZE */
131			"failed to get memory", /* ESPACE */
132			"bad back reference", /* ESUBREG */
133			"bad argument", /* INVARG */
134			"match failed" /* NOMATCH */
135			};
136
137
138
139
140			/*************************************************
141			* Translate error code to string *
142			*************************************************/
143
144	ph10	145	PCREPOSIX_EXP_DEFN size_t
145	nigel	3	regerror(int errcode, const regex_t preg, char errbuf, size_t errbuf_size)
146			{
147	nigel	7	const char message, addmessage;
148			size_t length, addlength;
149	nigel	3
150	nigel	7	message = (errcode >= (int)(sizeof(pstring)/sizeof(char *)))?
151	nigel	3	"unknown error code" : pstring[errcode];
152	nigel	7	length = strlen(message) + 1;
153	nigel	3
154	nigel	7	addmessage = " at offset ";
155			addlength = (preg != NULL && (int)preg->re_erroffset != -1)?
156			strlen(addmessage) + 6 : 0;
157	nigel	3
158			if (errbuf_size > 0)
159			{
160	nigel	7	if (addlength > 0 && errbuf_size >= length + addlength)
161	nigel	23	sprintf(errbuf, "%s%s%-6d", message, addmessage, (int)preg->re_erroffset);
162	nigel	3	else
163			{
164			strncpy(errbuf, message, errbuf_size - 1);
165			errbuf[errbuf_size-1] = 0;
166			}
167			}
168
169	nigel	7	return length + addlength;
170	nigel	3	}
171
172
173
174
175			/*************************************************
176			* Free store held by a regex *
177			*************************************************/
178
179	ph10	145	PCREPOSIX_EXP_DEFN void
180	nigel	3	regfree(regex_t *preg)
181			{
182			(pcre_free)(preg->re_pcre);
183			}
184
185
186
187
188			/*************************************************
189			* Compile a regular expression *
190			*************************************************/
191
192			/*
193			Arguments:
194			preg points to a structure for recording the compiled expression
195			pattern the pattern to compile
196			cflags compilation flags
197
198			Returns: 0 on success
199			various non-zero codes on failure
200			*/
201
202	ph10	145	PCREPOSIX_EXP_DEFN int
203	nigel	3	regcomp(regex_t preg, const char pattern, int cflags)
204			{
205	nigel	7	const char *errorptr;
206	nigel	3	int erroffset;
207	nigel	77	int errorcode;
208	nigel	3	int options = 0;
209
210	nigel	87	if ((cflags & REG_ICASE) != 0) options \|= PCRE_CASELESS;
211	nigel	3	if ((cflags & REG_NEWLINE) != 0) options \|= PCRE_MULTILINE;
212	nigel	87	if ((cflags & REG_DOTALL) != 0) options \|= PCRE_DOTALL;
213			if ((cflags & REG_NOSUB) != 0) options \|= PCRE_NO_AUTO_CAPTURE;
214			if ((cflags & REG_UTF8) != 0) options \|= PCRE_UTF8;
215	nigel	3
216	nigel	77	preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
217			&erroffset, NULL);
218	nigel	3	preg->re_erroffset = erroffset;
219
220	nigel	77	if (preg->re_pcre == NULL) return eint[errorcode];
221	nigel	3
222	nigel	71	preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
223	nigel	3	return 0;
224			}
225
226
227
228
229			/*************************************************
230			* Match a regular expression *
231			*************************************************/
232
233	nigel	41	/* Unfortunately, PCRE requires 3 ints of working space for each captured
234			substring, so we have to get and release working store instead of just using
235			the POSIX structures as was done in earlier releases when PCRE needed only 2
236	nigel	63	ints. However, if the number of possible capturing brackets is small, use a
237			block of store on the stack, to reduce the use of malloc/free. The threshold is
238	nigel	87	in a macro that can be changed at configure time.
239	nigel	41
240	nigel	87	If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
241			be set. When this is the case, the nmatch and pmatch arguments are ignored, and
242			the only result is yes/no/error. */
243
244	ph10	145	PCREPOSIX_EXP_DEFN int
245	nigel	69	regexec(const regex_t preg, const char string, size_t nmatch,
246	nigel	3	regmatch_t pmatch[], int eflags)
247			{
248			int rc;
249			int options = 0;
250	nigel	41	int *ovector = NULL;
251	nigel	63	int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
252			BOOL allocated_ovector = FALSE;
253	nigel	87	BOOL nosub =
254			(((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;
255	nigel	3
256			if ((eflags & REG_NOTBOL) != 0) options \|= PCRE_NOTBOL;
257			if ((eflags & REG_NOTEOL) != 0) options \|= PCRE_NOTEOL;
258
259	nigel	69	((regex_t )preg)->re_erroffset = (size_t)(-1); / Only has meaning after compile */
260	nigel	3
261	nigel	87	/* When no string data is being returned, ensure that nmatch is zero.
262			Otherwise, ensure the vector for holding the return data is large enough. */
263
264			if (nosub) nmatch = 0;
265
266			else if (nmatch > 0)
267	nigel	41	{
268	nigel	63	if (nmatch <= POSIX_MALLOC_THRESHOLD)
269			{
270			ovector = &(small_ovector[0]);
271			}
272			else
273			{
274	nigel	87	if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
275	nigel	63	ovector = (int )malloc(sizeof(int) nmatch * 3);
276			if (ovector == NULL) return REG_ESPACE;
277			allocated_ovector = TRUE;
278			}
279	nigel	41	}
280
281	nigel	71	rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),
282			0, options, ovector, nmatch * 3);
283	nigel	3
284	nigel	41	if (rc == 0) rc = nmatch; /* All captured slots were filled in */
285	nigel	3
286	nigel	41	if (rc >= 0)
287	nigel	3	{
288	nigel	7	size_t i;
289	nigel	87	if (!nosub)
290	nigel	41	{
291	nigel	87	for (i = 0; i < (size_t)rc; i++)
292			{
293			pmatch[i].rm_so = ovector[i*2];
294			pmatch[i].rm_eo = ovector[i*2+1];
295			}
296			if (allocated_ovector) free(ovector);
297			for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
298	nigel	41	}
299	nigel	3	return 0;
300			}
301
302	nigel	41	else
303	nigel	3	{
304	nigel	63	if (allocated_ovector) free(ovector);
305	nigel	41	switch(rc)
306			{
307			case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
308			case PCRE_ERROR_NULL: return REG_INVARG;
309			case PCRE_ERROR_BADOPTION: return REG_INVARG;
310			case PCRE_ERROR_BADMAGIC: return REG_INVARG;
311			case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
312			case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
313	nigel	73	case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
314			case PCRE_ERROR_BADUTF8: return REG_INVARG;
315			case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
316	nigel	41	default: return REG_ASSERT;
317			}
318	nigel	3	}
319			}
320
321			/* End of pcreposix.c */
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