tags/pcre-8.12/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) 1997-2010 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. */


#ifdef HAVE_CONFIG_H
#include "config.h"
#endif


/* Ensure that the PCREPOSIX_EXP_xxx macros are set appropriately for
compiling these functions. This must come before including pcreposix.h, where
they are set for an application (using these functions) if they have not
previously been set. */

#if defined(_WIN32) && !defined(PCRE_STATIC)
#  define PCREPOSIX_EXP_DECL extern __declspec(dllexport)
#  define PCREPOSIX_EXP_DEFN __declspec(dllexport)
#endif

/* We include pcre.h before pcre_internal.h so that the PCRE library functions
are declared as "import" for Windows by defining PCRE_EXP_DECL as "import".
This is needed even though pcre_internal.h itself includes pcre.h, because it
does so after it has set PCRE_EXP_DECL to "export" if it is not already set. */

#include "pcre.h"
#include "pcre_internal.h"
#include "pcreposix.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 */
  /* 5 */
  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 */
  /* 10 */
  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 ) */
  /* 15 */
  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 */
  /* 20 */
  REG_ESIZE,   /* regular expression too large */
  REG_ESPACE,  /* failed to get memory */
  REG_EPAREN,  /* unmatched parentheses */
  REG_ASSERT,  /* internal error: code overflow */
  REG_BADPAT,  /* unrecognized character after (?< */
  /* 25 */
  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 ) */
  /* 30 */
  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 */
  /* 35 */
  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 */
  /* 40 */
  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 */
  /* 45 */
  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) */
  /* 50 */
  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 */
  /* 55 */
  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,  /* a numbered reference must not be zero */
  REG_BADPAT,  /* an argument is not allowed for (*ACCEPT), (*FAIL), or (*COMMIT) */
  /* 60 */
  REG_BADPAT,  /* (*VERB) not recognized */
  REG_BADPAT,  /* number is too big */
  REG_BADPAT,  /* subpattern name expected */
  REG_BADPAT,  /* digit expected after (?+ */
  REG_BADPAT,  /* ] is an invalid data character in JavaScript compatibility mode */
  /* 65 */
  REG_BADPAT,  /* different names for subpatterns of the same number are not allowed */
  REG_BADPAT,  /* (*MARK) must have an argument */
  REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UCP support */
  REG_BADPAT,  /* \c must be followed by an ASCII character */
};

/* 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 PCRE_CALL_CONVENTION
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 PCRE_CALL_CONVENTION
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 PCRE_CALL_CONVENTION
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;
if ((cflags & REG_UCP) != 0)      options |= PCRE_UCP;
if ((cflags & REG_UNGREEDY) != 0) options |= PCRE_UNGREEDY;

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

/* Safety: if the error code is too big for the translation vector (which
should not happen, but we all make mistakes), return REG_BADPAT. */

if (preg->re_pcre == NULL)
  {
  return (errorcode < sizeof(eint)/sizeof(const int))?
    eint[errorcode] : REG_BADPAT;
  }

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 PCRE_CALL_CONVENTION
regexec(const regex_t *preg, const char *string, size_t nmatch,
  regmatch_t pmatch[], int eflags)
{
int rc, so, eo;
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;
if ((eflags & REG_NOTEMPTY) != 0) options |= PCRE_NOTEMPTY;

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

/* When no string data is being returned, or no vector has been passed in which
to put it, ensure that nmatch is zero. Otherwise, ensure the vector for holding
the return data is large enough. */

if (nosub || pmatch == NULL) 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;
    }
  }

/* REG_STARTEND is a BSD extension, to allow for non-NUL-terminated strings.
The man page from OS X says "REG_STARTEND affects only the location of the
string, not how it is matched". That is why the "so" value is used to bump the
start location rather than being passed as a PCRE "starting offset". */

if ((eflags & REG_STARTEND) != 0)
  {
  so = pmatch[0].rm_so;
  eo = pmatch[0].rm_eo;
  }
else
  {
  so = 0;
  eo = (int)strlen(string);
  }

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

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

/* Successful match */

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;
  }

/* Unsuccessful match */

if (allocated_ovector) free(ovector);
switch(rc)
  {
/* ========================================================================== */
  /* These cases are never obeyed. This is a fudge that causes a compile-time
  error if the vector eint, which is indexed by compile-time error number, is
  not the correct length. It seems to be the only way to do such a check at
  compile time, as the sizeof() operator does not work in the C preprocessor.
  As all the PCRE_ERROR_xxx values are negative, we can use 0 and 1. */

  case 0:
  case (sizeof(eint)/sizeof(int) == ERRCOUNT):
  return REG_ASSERT;
/* ========================================================================== */

  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	518	Copyright (c) 1997-2010 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	ph10	200	#ifdef HAVE_CONFIG_H
46	ph10	236	#include "config.h"
47	ph10	200	#endif
48	ph10	199
49
50	ph10	200	/* Ensure that the PCREPOSIX_EXP_xxx macros are set appropriately for
51	ph10	199	compiling these functions. This must come before including pcreposix.h, where
52			they are set for an application (using these functions) if they have not
53			previously been set. */
54
55			#if defined(_WIN32) && !defined(PCRE_STATIC)
56			# define PCREPOSIX_EXP_DECL extern __declspec(dllexport)
57			# define PCREPOSIX_EXP_DEFN __declspec(dllexport)
58			#endif
59
60	ph10	545	/* We include pcre.h before pcre_internal.h so that the PCRE library functions
61	ph10	536	are declared as "import" for Windows by defining PCRE_EXP_DECL as "import".
62	ph10	545	This is needed even though pcre_internal.h itself includes pcre.h, because it
63	ph10	536	does so after it has set PCRE_EXP_DECL to "export" if it is not already set. */
64
65			#include "pcre.h"
66	nigel	77	#include "pcre_internal.h"
67	nigel	3	#include "pcreposix.h"
68
69
70	nigel	77	/* Table to translate PCRE compile time error codes into POSIX error codes. */
71	nigel	3
72	nigel	73	static const int eint[] = {
73	nigel	77	0, /* no error */
74			REG_EESCAPE, /* \ at end of pattern */
75			REG_EESCAPE, /* \c at end of pattern */
76			REG_EESCAPE, /* unrecognized character follows \ */
77			REG_BADBR, /* numbers out of order in {} quantifier */
78	ph10	461	/* 5 */
79	nigel	77	REG_BADBR, /* number too big in {} quantifier */
80			REG_EBRACK, /* missing terminating ] for character class */
81			REG_ECTYPE, /* invalid escape sequence in character class */
82			REG_ERANGE, /* range out of order in character class */
83			REG_BADRPT, /* nothing to repeat */
84	ph10	461	/* 10 */
85	nigel	77	REG_BADRPT, /* operand of unlimited repeat could match the empty string */
86			REG_ASSERT, /* internal error: unexpected repeat */
87			REG_BADPAT, /* unrecognized character after (? */
88			REG_BADPAT, /* POSIX named classes are supported only within a class */
89			REG_EPAREN, /* missing ) */
90	ph10	461	/* 15 */
91	nigel	77	REG_ESUBREG, /* reference to non-existent subpattern */
92			REG_INVARG, /* erroffset passed as NULL */
93			REG_INVARG, /* unknown option bit(s) set */
94			REG_EPAREN, /* missing ) after comment */
95			REG_ESIZE, /* parentheses nested too deeply */
96	ph10	461	/* 20 */
97	nigel	77	REG_ESIZE, /* regular expression too large */
98			REG_ESPACE, /* failed to get memory */
99	ph10	418	REG_EPAREN, /* unmatched parentheses */
100	nigel	77	REG_ASSERT, /* internal error: code overflow */
101			REG_BADPAT, /* unrecognized character after (?< */
102	ph10	461	/* 25 */
103	nigel	77	REG_BADPAT, /* lookbehind assertion is not fixed length */
104	nigel	91	REG_BADPAT, /* malformed number or name after (?( */
105	nigel	93	REG_BADPAT, /* conditional group contains more than two branches */
106	nigel	77	REG_BADPAT, /* assertion expected after (?( */
107	ph10	166	REG_BADPAT, /* (?R or (?[+-]digits must be followed by ) */
108	ph10	461	/* 30 */
109	nigel	77	REG_ECTYPE, /* unknown POSIX class name */
110			REG_BADPAT, /* POSIX collating elements are not supported */
111			REG_INVARG, /* this version of PCRE is not compiled with PCRE_UTF8 support */
112			REG_BADPAT, /* spare error */
113			REG_BADPAT, /* character value in \x{...} sequence is too large */
114	ph10	461	/* 35 */
115	nigel	77	REG_BADPAT, /* invalid condition (?(0) */
116			REG_BADPAT, /* \C not allowed in lookbehind assertion */
117			REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
118			REG_BADPAT, /* number after (?C is > 255 */
119			REG_BADPAT, /* closing ) for (?C expected */
120	ph10	461	/* 40 */
121	nigel	77	REG_BADPAT, /* recursive call could loop indefinitely */
122			REG_BADPAT, /* unrecognized character after (?P */
123	nigel	93	REG_BADPAT, /* syntax error in subpattern name (missing terminator) */
124	nigel	91	REG_BADPAT, /* two named subpatterns have the same name */
125	nigel	77	REG_BADPAT, /* invalid UTF-8 string */
126	ph10	461	/* 45 */
127	nigel	77	REG_BADPAT, /* support for \P, \p, and \X has not been compiled */
128			REG_BADPAT, /* malformed \P or \p sequence */
129	nigel	91	REG_BADPAT, /* unknown property name after \P or \p */
130			REG_BADPAT, /* subpattern name is too long (maximum 32 characters) */
131			REG_BADPAT, /* too many named subpatterns (maximum 10,000) */
132	ph10	461	/* 50 */
133	nigel	91	REG_BADPAT, /* repeated subpattern is too long */
134	nigel	93	REG_BADPAT, /* octal value is greater than \377 (not in UTF-8 mode) */
135			REG_BADPAT, /* internal error: overran compiling workspace */
136			REG_BADPAT, /* internal error: previously-checked referenced subpattern not found */
137			REG_BADPAT, /* DEFINE group contains more than one branch */
138	ph10	461	/* 55 */
139	nigel	93	REG_BADPAT, /* repeating a DEFINE group is not allowed */
140			REG_INVARG, /* inconsistent NEWLINE options */
141	ph10	166	REG_BADPAT, /* \g is not followed followed by an (optionally braced) non-zero number */
142	ph10	418	REG_BADPAT, /* a numbered reference must not be zero */
143	ph10	510	REG_BADPAT, /* an argument is not allowed for (ACCEPT), (FAIL), or (COMMIT) /
144	ph10	418	/* 60 */
145	ph10	461	REG_BADPAT, /* (VERB) not recognized /
146	ph10	268	REG_BADPAT, /* number is too big */
147	ph10	286	REG_BADPAT, /* subpattern name expected */
148	ph10	336	REG_BADPAT, /* digit expected after (?+ */
149	ph10	457	REG_BADPAT, /* ] is an invalid data character in JavaScript compatibility mode */
150			/* 65 */
151	ph10	510	REG_BADPAT, /* different names for subpatterns of the same number are not allowed */
152			REG_BADPAT, /* (MARK) must have an argument /
153	ph10	518	REG_INVARG, /* this version of PCRE is not compiled with PCRE_UCP support */
154	ph10	579	REG_BADPAT, /* \c must be followed by an ASCII character */
155	nigel	3	};
156
157			/* Table of texts corresponding to POSIX error codes */
158
159	nigel	73	static const char *const pstring[] = {
160	nigel	3	"", /* Dummy for value 0 */
161			"internal error", /* REG_ASSERT */
162			"invalid repeat counts in {}", /* BADBR */
163			"pattern error", /* BADPAT */
164			"? * + invalid", /* BADRPT */
165			"unbalanced {}", /* EBRACE */
166			"unbalanced []", /* EBRACK */
167			"collation error - not relevant", /* ECOLLATE */
168			"bad class", /* ECTYPE */
169			"bad escape sequence", /* EESCAPE */
170			"empty expression", /* EMPTY */
171			"unbalanced ()", /* EPAREN */
172			"bad range inside []", /* ERANGE */
173			"expression too big", /* ESIZE */
174			"failed to get memory", /* ESPACE */
175			"bad back reference", /* ESUBREG */
176			"bad argument", /* INVARG */
177			"match failed" /* NOMATCH */
178			};
179
180
181
182
183			/*************************************************
184			* Translate error code to string *
185			*************************************************/
186
187	ph10	359	PCREPOSIX_EXP_DEFN size_t PCRE_CALL_CONVENTION
188	nigel	3	regerror(int errcode, const regex_t preg, char errbuf, size_t errbuf_size)
189			{
190	nigel	7	const char message, addmessage;
191			size_t length, addlength;
192	nigel	3
193	nigel	7	message = (errcode >= (int)(sizeof(pstring)/sizeof(char *)))?
194	nigel	3	"unknown error code" : pstring[errcode];
195	nigel	7	length = strlen(message) + 1;
196	nigel	3
197	nigel	7	addmessage = " at offset ";
198			addlength = (preg != NULL && (int)preg->re_erroffset != -1)?
199			strlen(addmessage) + 6 : 0;
200	nigel	3
201			if (errbuf_size > 0)
202			{
203	nigel	7	if (addlength > 0 && errbuf_size >= length + addlength)
204	nigel	23	sprintf(errbuf, "%s%s%-6d", message, addmessage, (int)preg->re_erroffset);
205	nigel	3	else
206			{
207			strncpy(errbuf, message, errbuf_size - 1);
208			errbuf[errbuf_size-1] = 0;
209			}
210			}
211
212	nigel	7	return length + addlength;
213	nigel	3	}
214
215
216
217
218			/*************************************************
219			* Free store held by a regex *
220			*************************************************/
221
222	ph10	359	PCREPOSIX_EXP_DEFN void PCRE_CALL_CONVENTION
223	nigel	3	regfree(regex_t *preg)
224			{
225			(pcre_free)(preg->re_pcre);
226			}
227
228
229
230
231			/*************************************************
232			* Compile a regular expression *
233			*************************************************/
234
235			/*
236			Arguments:
237			preg points to a structure for recording the compiled expression
238			pattern the pattern to compile
239			cflags compilation flags
240
241			Returns: 0 on success
242			various non-zero codes on failure
243			*/
244
245	ph10	359	PCREPOSIX_EXP_DEFN int PCRE_CALL_CONVENTION
246	nigel	3	regcomp(regex_t preg, const char pattern, int cflags)
247			{
248	nigel	7	const char *errorptr;
249	nigel	3	int erroffset;
250	nigel	77	int errorcode;
251	nigel	3	int options = 0;
252
253	ph10	432	if ((cflags & REG_ICASE) != 0) options \|= PCRE_CASELESS;
254			if ((cflags & REG_NEWLINE) != 0) options \|= PCRE_MULTILINE;
255			if ((cflags & REG_DOTALL) != 0) options \|= PCRE_DOTALL;
256			if ((cflags & REG_NOSUB) != 0) options \|= PCRE_NO_AUTO_CAPTURE;
257			if ((cflags & REG_UTF8) != 0) options \|= PCRE_UTF8;
258	ph10	518	if ((cflags & REG_UCP) != 0) options \|= PCRE_UCP;
259	ph10	432	if ((cflags & REG_UNGREEDY) != 0) options \|= PCRE_UNGREEDY;
260	nigel	3
261	nigel	77	preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
262			&erroffset, NULL);
263	nigel	3	preg->re_erroffset = erroffset;
264
265	ph10	461	/* Safety: if the error code is too big for the translation vector (which
266	ph10	418	should not happen, but we all make mistakes), return REG_BADPAT. */
267	nigel	3
268	ph10	461	if (preg->re_pcre == NULL)
269	ph10	418	{
270			return (errorcode < sizeof(eint)/sizeof(const int))?
271			eint[errorcode] : REG_BADPAT;
272	ph10	461	}
273	ph10	418
274	nigel	71	preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
275	nigel	3	return 0;
276			}
277
278
279
280
281			/*************************************************
282			* Match a regular expression *
283			*************************************************/
284
285	nigel	41	/* Unfortunately, PCRE requires 3 ints of working space for each captured
286			substring, so we have to get and release working store instead of just using
287			the POSIX structures as was done in earlier releases when PCRE needed only 2
288	nigel	63	ints. However, if the number of possible capturing brackets is small, use a
289			block of store on the stack, to reduce the use of malloc/free. The threshold is
290	nigel	87	in a macro that can be changed at configure time.
291	nigel	41
292	nigel	87	If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
293			be set. When this is the case, the nmatch and pmatch arguments are ignored, and
294			the only result is yes/no/error. */
295
296	ph10	359	PCREPOSIX_EXP_DEFN int PCRE_CALL_CONVENTION
297	nigel	69	regexec(const regex_t preg, const char string, size_t nmatch,
298	nigel	3	regmatch_t pmatch[], int eflags)
299			{
300	ph10	332	int rc, so, eo;
301	nigel	3	int options = 0;
302	nigel	41	int *ovector = NULL;
303	nigel	63	int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
304			BOOL allocated_ovector = FALSE;
305	nigel	87	BOOL nosub =
306			(((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;
307	nigel	3
308			if ((eflags & REG_NOTBOL) != 0) options \|= PCRE_NOTBOL;
309			if ((eflags & REG_NOTEOL) != 0) options \|= PCRE_NOTEOL;
310	ph10	388	if ((eflags & REG_NOTEMPTY) != 0) options \|= PCRE_NOTEMPTY;
311	nigel	3
312	nigel	69	((regex_t )preg)->re_erroffset = (size_t)(-1); / Only has meaning after compile */
313	nigel	3
314	ph10	461	/* When no string data is being returned, or no vector has been passed in which
315	ph10	432	to put it, ensure that nmatch is zero. Otherwise, ensure the vector for holding
316			the return data is large enough. */
317	nigel	87
318	ph10	432	if (nosub \|\| pmatch == NULL) nmatch = 0;
319	nigel	87
320			else if (nmatch > 0)
321	nigel	41	{
322	nigel	63	if (nmatch <= POSIX_MALLOC_THRESHOLD)
323			{
324			ovector = &(small_ovector[0]);
325			}
326			else
327			{
328	nigel	87	if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
329	nigel	63	ovector = (int )malloc(sizeof(int) nmatch * 3);
330			if (ovector == NULL) return REG_ESPACE;
331			allocated_ovector = TRUE;
332			}
333	nigel	41	}
334
335	ph10	332	/* REG_STARTEND is a BSD extension, to allow for non-NUL-terminated strings.
336			The man page from OS X says "REG_STARTEND affects only the location of the
337	ph10	345	string, not how it is matched". That is why the "so" value is used to bump the
338	ph10	332	start location rather than being passed as a PCRE "starting offset". */
339
340	ph10	345	if ((eflags & REG_STARTEND) != 0)
341	ph10	332	{
342			so = pmatch[0].rm_so;
343			eo = pmatch[0].rm_eo;
344	ph10	345	}
345			else
346	ph10	332	{
347			so = 0;
348	ph10	530	eo = (int)strlen(string);
349	ph10	332	}
350
351			rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string + so, (eo - so),
352	ph10	530	0, options, ovector, (int)(nmatch * 3));
353	nigel	3
354	ph10	530	if (rc == 0) rc = (int)nmatch; /* All captured slots were filled in */
355	nigel	3
356	ph10	499	/* Successful match */
357
358	nigel	41	if (rc >= 0)
359	nigel	3	{
360	nigel	7	size_t i;
361	nigel	87	if (!nosub)
362	nigel	41	{
363	nigel	87	for (i = 0; i < (size_t)rc; i++)
364			{
365			pmatch[i].rm_so = ovector[i*2];
366			pmatch[i].rm_eo = ovector[i*2+1];
367			}
368			if (allocated_ovector) free(ovector);
369			for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
370	nigel	41	}
371	nigel	3	return 0;
372			}
373
374	ph10	499	/* Unsuccessful match */
375
376			if (allocated_ovector) free(ovector);
377			switch(rc)
378	nigel	3	{
379	ph10	499	/* ========================================================================== */
380			/* These cases are never obeyed. This is a fudge that causes a compile-time
381			error if the vector eint, which is indexed by compile-time error number, is
382			not the correct length. It seems to be the only way to do such a check at
383			compile time, as the sizeof() operator does not work in the C preprocessor.
384	ph10	507	As all the PCRE_ERROR_xxx values are negative, we can use 0 and 1. */
385	ph10	499
386			case 0:
387			case (sizeof(eint)/sizeof(int) == ERRCOUNT):
388			return REG_ASSERT;
389			/* ========================================================================== */
390
391			case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
392			case PCRE_ERROR_NULL: return REG_INVARG;
393			case PCRE_ERROR_BADOPTION: return REG_INVARG;
394			case PCRE_ERROR_BADMAGIC: return REG_INVARG;
395			case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
396			case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
397			case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
398			case PCRE_ERROR_BADUTF8: return REG_INVARG;
399			case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
400			default: return REG_ASSERT;
401	nigel	3	}
402			}
403
404			/* End of pcreposix.c */
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