/[pcre]/code/trunk/pcreposix.c
ViewVC logotype

Diff of /code/trunk/pcreposix.c

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 71 by nigel, Sat Feb 24 21:40:24 2007 UTC revision 286 by ph10, Mon Dec 17 14:46:11 2007 UTC
# Line 2  Line 2 
2  *      Perl-Compatible Regular Expressions       *  *      Perl-Compatible Regular Expressions       *
3  *************************************************/  *************************************************/
4    
5  /*  /* PCRE is a library of functions to support regular expressions whose syntax
6  This 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.
 and semantics are as close as possible to those of the Perl 5 language. See  
 the file Tech.Notes for some information on the internals.  
7    
8  This module is a wrapper that provides a POSIX API to the underlying PCRE                         Written by Philip Hazel
9  functions.             Copyright (c) 1997-2007 University of Cambridge
10    
11  Written by: Philip Hazel <ph10@cam.ac.uk>  -----------------------------------------------------------------------------
12    Redistribution and use in source and binary forms, with or without
13    modification, are permitted provided that the following conditions are met:
14    
15             Copyright (c) 1997-2003 University of Cambridge      * Redistributions of source code must retain the above copyright notice,
16          this list of conditions and the following disclaimer.
17    
18  -----------------------------------------------------------------------------      * Redistributions in binary form must reproduce the above copyright
19  Permission is granted to anyone to use this software for any purpose on any        notice, this list of conditions and the following disclaimer in the
20  computer system, and to redistribute it freely, subject to the following        documentation and/or other materials provided with the distribution.
21  restrictions:  
22        * Neither the name of the University of Cambridge nor the names of its
23  1. This software is distributed in the hope that it will be useful,        contributors may be used to endorse or promote products derived from
24     but WITHOUT ANY WARRANTY; without even the implied warranty of        this software without specific prior written permission.
25     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
26    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27  2. The origin of this software must not be misrepresented, either by  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28     explicit claim or by omission.  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30  3. Altered versions must be plainly marked as such, and must not be  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31     misrepresented as being the original software.  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33  4. If PCRE is embedded in any software that is released under the GNU  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34     General Purpose Licence (GPL), then the terms of that licence shall  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35     supersede any condition above with which it is incompatible.  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36    POSSIBILITY OF SUCH DAMAGE.
37  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
38  */  */
39    
 #include "internal.h"  
 #include "pcreposix.h"  
 #include "stdlib.h"  
40    
41    /* This module is a wrapper that provides a POSIX API to the underlying PCRE
42    functions. */
43    
44    
45    #ifdef HAVE_CONFIG_H
46    #include "config.h"
47    #endif
48    
49    
50  /* Corresponding tables of PCRE error messages and POSIX error codes. */  /* Ensure that the PCREPOSIX_EXP_xxx macros are set appropriately for
51    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  static const char *estring[] = {  #if defined(_WIN32) && !defined(PCRE_STATIC)
56    ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,  ERR10,  #  define PCREPOSIX_EXP_DECL extern __declspec(dllexport)
57    ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, ERR20,  #  define PCREPOSIX_EXP_DEFN __declspec(dllexport)
58    ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR29, ERR29, ERR30,  #endif
59    ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39, ERR40,  
60    ERR41, ERR42, ERR43, ERR44 };  #include "pcre.h"
61    #include "pcre_internal.h"
62  static int eint[] = {  #include "pcreposix.h"
63    REG_EESCAPE, /* "\\ at end of pattern" */  
64    REG_EESCAPE, /* "\\c at end of pattern" */  
65    REG_EESCAPE, /* "unrecognized character follows \\" */  /* Table to translate PCRE compile time error codes into POSIX error codes. */
66    REG_BADBR,   /* "numbers out of order in {} quantifier" */  
67    REG_BADBR,   /* "number too big in {} quantifier" */  static const int eint[] = {
68    REG_EBRACK,  /* "missing terminating ] for character class" */    0,           /* no error */
69    REG_ECTYPE,  /* "invalid escape sequence in character class" */    REG_EESCAPE, /* \ at end of pattern */
70    REG_ERANGE,  /* "range out of order in character class" */    REG_EESCAPE, /* \c at end of pattern */
71    REG_BADRPT,  /* "nothing to repeat" */    REG_EESCAPE, /* unrecognized character follows \ */
72    REG_BADRPT,  /* "operand of unlimited repeat could match the empty string" */    REG_BADBR,   /* numbers out of order in {} quantifier */
73    REG_ASSERT,  /* "internal error: unexpected repeat" */    REG_BADBR,   /* number too big in {} quantifier */
74    REG_BADPAT,  /* "unrecognized character after (?" */    REG_EBRACK,  /* missing terminating ] for character class */
75    REG_BADPAT,  /* "POSIX named classes are supported only within a class" */    REG_ECTYPE,  /* invalid escape sequence in character class */
76    REG_EPAREN,  /* "missing )" */    REG_ERANGE,  /* range out of order in character class */
77    REG_ESUBREG, /* "reference to non-existent subpattern" */    REG_BADRPT,  /* nothing to repeat */
78    REG_INVARG,  /* "erroffset passed as NULL" */    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */
79    REG_INVARG,  /* "unknown option bit(s) set" */    REG_ASSERT,  /* internal error: unexpected repeat */
80    REG_EPAREN,  /* "missing ) after comment" */    REG_BADPAT,  /* unrecognized character after (? */
81    REG_ESIZE,   /* "parentheses nested too deeply" */    REG_BADPAT,  /* POSIX named classes are supported only within a class */
82    REG_ESIZE,   /* "regular expression too large" */    REG_EPAREN,  /* missing ) */
83    REG_ESPACE,  /* "failed to get memory" */    REG_ESUBREG, /* reference to non-existent subpattern */
84    REG_EPAREN,  /* "unmatched brackets" */    REG_INVARG,  /* erroffset passed as NULL */
85    REG_ASSERT,  /* "internal error: code overflow" */    REG_INVARG,  /* unknown option bit(s) set */
86    REG_BADPAT,  /* "unrecognized character after (?<" */    REG_EPAREN,  /* missing ) after comment */
87    REG_BADPAT,  /* "lookbehind assertion is not fixed length" */    REG_ESIZE,   /* parentheses nested too deeply */
88    REG_BADPAT,  /* "malformed number after (?(" */    REG_ESIZE,   /* regular expression too large */
89    REG_BADPAT,  /* "conditional group containe more than two branches" */    REG_ESPACE,  /* failed to get memory */
90    REG_BADPAT,  /* "assertion expected after (?(" */    REG_EPAREN,  /* unmatched brackets */
91    REG_BADPAT,  /* "(?R or (?digits must be followed by )" */    REG_ASSERT,  /* internal error: code overflow */
92    REG_ECTYPE,  /* "unknown POSIX class name" */    REG_BADPAT,  /* unrecognized character after (?< */
93    REG_BADPAT,  /* "POSIX collating elements are not supported" */    REG_BADPAT,  /* lookbehind assertion is not fixed length */
94    REG_INVARG,  /* "this version of PCRE is not compiled with PCRE_UTF8 support" */    REG_BADPAT,  /* malformed number or name after (?( */
95    REG_BADPAT,  /* "spare error" */    REG_BADPAT,  /* conditional group contains more than two branches */
96    REG_BADPAT,  /* "character value in \x{...} sequence is too large" */    REG_BADPAT,  /* assertion expected after (?( */
97    REG_BADPAT,  /* "invalid condition (?(0)" */    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
98    REG_BADPAT,  /* "\\C not allowed in lookbehind assertion" */    REG_ECTYPE,  /* unknown POSIX class name */
99    REG_EESCAPE, /* "PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X" */    REG_BADPAT,  /* POSIX collating elements are not supported */
100    REG_BADPAT,  /* "number after (?C is > 255" */    REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UTF8 support */
101    REG_BADPAT,  /* "closing ) for (?C expected" */    REG_BADPAT,  /* spare error */
102    REG_BADPAT,  /* "recursive call could loop indefinitely" */    REG_BADPAT,  /* character value in \x{...} sequence is too large */
103    REG_BADPAT,  /* "unrecognized character after (?P" */    REG_BADPAT,  /* invalid condition (?(0) */
104    REG_BADPAT,  /* "syntax error after (?P" */    REG_BADPAT,  /* \C not allowed in lookbehind assertion */
105    REG_BADPAT,  /* "two named groups have the same name" */    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
106    REG_BADPAT   /* "invalid UTF-8 string" */    REG_BADPAT,  /* number after (?C is > 255 */
107      REG_BADPAT,  /* closing ) for (?C expected */
108      REG_BADPAT,  /* recursive call could loop indefinitely */
109      REG_BADPAT,  /* unrecognized character after (?P */
110      REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
111      REG_BADPAT,  /* two named subpatterns have the same name */
112      REG_BADPAT,  /* invalid UTF-8 string */
113      REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
114      REG_BADPAT,  /* malformed \P or \p sequence */
115      REG_BADPAT,  /* unknown property name after \P or \p */
116      REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */
117      REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */
118      REG_BADPAT,  /* repeated subpattern is too long */
119      REG_BADPAT,  /* octal value is greater than \377 (not in UTF-8 mode) */
120      REG_BADPAT,  /* internal error: overran compiling workspace */
121      REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */
122      REG_BADPAT,  /* DEFINE group contains more than one branch */
123      REG_BADPAT,  /* repeating a DEFINE group is not allowed */
124      REG_INVARG,  /* inconsistent NEWLINE options */
125      REG_BADPAT,  /* \g is not followed followed by an (optionally braced) non-zero number */
126      REG_BADPAT,  /* (?+ or (?- must be followed by a non-zero number */
127      REG_BADPAT,  /* number is too big */
128      REG_BADPAT,  /* subpattern name expected */
129      REG_BADPAT   /* digit expected after (?+ */
130  };  };
131    
132  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
133    
134  static const char *pstring[] = {  static const char *const pstring[] = {
135    "",                                /* Dummy for value 0 */    "",                                /* Dummy for value 0 */
136    "internal error",                  /* REG_ASSERT */    "internal error",                  /* REG_ASSERT */
137    "invalid repeat counts in {}",     /* BADBR      */    "invalid repeat counts in {}",     /* BADBR      */
# Line 124  static const char *pstring[] = { Line 156  static const char *pstring[] = {
156    
157    
158  /*************************************************  /*************************************************
 *          Translate PCRE text code to int       *  
 *************************************************/  
   
 /* PCRE compile-time errors are given as strings defined as macros. We can just  
 look them up in a table to turn them into POSIX-style error codes. */  
   
 static int  
 pcre_posix_error_code(const char *s)  
 {  
 size_t i;  
 for (i = 0; i < sizeof(estring)/sizeof(char *); i++)  
   if (strcmp(s, estring[i]) == 0) return eint[i];  
 return REG_ASSERT;  
 }  
   
   
   
 /*************************************************  
159  *          Translate error code to string        *  *          Translate error code to string        *
160  *************************************************/  *************************************************/
161    
162  size_t  PCREPOSIX_EXP_DEFN size_t
163  regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)  regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
164  {  {
165  const char *message, *addmessage;  const char *message, *addmessage;
# Line 180  return length + addlength; Line 194  return length + addlength;
194  *           Free store held by a regex           *  *           Free store held by a regex           *
195  *************************************************/  *************************************************/
196    
197  void  PCREPOSIX_EXP_DEFN void
198  regfree(regex_t *preg)  regfree(regex_t *preg)
199  {  {
200  (pcre_free)(preg->re_pcre);  (pcre_free)(preg->re_pcre);
# Line 203  Returns:      0 on success Line 217  Returns:      0 on success
217                various non-zero codes on failure                various non-zero codes on failure
218  */  */
219    
220  int  PCREPOSIX_EXP_DEFN int
221  regcomp(regex_t *preg, const char *pattern, int cflags)  regcomp(regex_t *preg, const char *pattern, int cflags)
222  {  {
223  const char *errorptr;  const char *errorptr;
224  int erroffset;  int erroffset;
225    int errorcode;
226  int options = 0;  int options = 0;
227    
228  if ((cflags & REG_ICASE) != 0) options |= PCRE_CASELESS;  if ((cflags & REG_ICASE) != 0)   options |= PCRE_CASELESS;
229  if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;  if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;
230    if ((cflags & REG_DOTALL) != 0)  options |= PCRE_DOTALL;
231    if ((cflags & REG_NOSUB) != 0)   options |= PCRE_NO_AUTO_CAPTURE;
232    if ((cflags & REG_UTF8) != 0)    options |= PCRE_UTF8;
233    
234  preg->re_pcre = pcre_compile(pattern, options, &errorptr, &erroffset, NULL);  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
235      &erroffset, NULL);
236  preg->re_erroffset = erroffset;  preg->re_erroffset = erroffset;
237    
238  if (preg->re_pcre == NULL) return pcre_posix_error_code(errorptr);  if (preg->re_pcre == NULL) return eint[errorcode];
239    
240  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
241  return 0;  return 0;
# Line 234  substring, so we have to get and release Line 253  substring, so we have to get and release
253  the POSIX structures as was done in earlier releases when PCRE needed only 2  the POSIX structures as was done in earlier releases when PCRE needed only 2
254  ints. However, if the number of possible capturing brackets is small, use a  ints. However, if the number of possible capturing brackets is small, use a
255  block of store on the stack, to reduce the use of malloc/free. The threshold is  block of store on the stack, to reduce the use of malloc/free. The threshold is
256  in a macro that can be changed at configure time. */  in a macro that can be changed at configure time.
257    
258    If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
259    be set. When this is the case, the nmatch and pmatch arguments are ignored, and
260    the only result is yes/no/error. */
261    
262  int  PCREPOSIX_EXP_DEFN int
263  regexec(const regex_t *preg, const char *string, size_t nmatch,  regexec(const regex_t *preg, const char *string, size_t nmatch,
264    regmatch_t pmatch[], int eflags)    regmatch_t pmatch[], int eflags)
265  {  {
# Line 245  int options = 0; Line 268  int options = 0;
268  int *ovector = NULL;  int *ovector = NULL;
269  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
270  BOOL allocated_ovector = FALSE;  BOOL allocated_ovector = FALSE;
271    BOOL nosub =
272      (((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;
273    
274  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
275  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
276    
277  ((regex_t *)preg)->re_erroffset = (size_t)(-1);  /* Only has meaning after compile */  ((regex_t *)preg)->re_erroffset = (size_t)(-1);  /* Only has meaning after compile */
278    
279  if (nmatch > 0)  /* When no string data is being returned, ensure that nmatch is zero.
280    Otherwise, ensure the vector for holding the return data is large enough. */
281    
282    if (nosub) nmatch = 0;
283    
284    else if (nmatch > 0)
285    {    {
286    if (nmatch <= POSIX_MALLOC_THRESHOLD)    if (nmatch <= POSIX_MALLOC_THRESHOLD)
287      {      {
# Line 259  if (nmatch > 0) Line 289  if (nmatch > 0)
289      }      }
290    else    else
291      {      {
292        if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
293      ovector = (int *)malloc(sizeof(int) * nmatch * 3);      ovector = (int *)malloc(sizeof(int) * nmatch * 3);
294      if (ovector == NULL) return REG_ESPACE;      if (ovector == NULL) return REG_ESPACE;
295      allocated_ovector = TRUE;      allocated_ovector = TRUE;
# Line 273  if (rc == 0) rc = nmatch;    /* All capt Line 304  if (rc == 0) rc = nmatch;    /* All capt
304  if (rc >= 0)  if (rc >= 0)
305    {    {
306    size_t i;    size_t i;
307    for (i = 0; i < (size_t)rc; i++)    if (!nosub)
308      {      {
309      pmatch[i].rm_so = ovector[i*2];      for (i = 0; i < (size_t)rc; i++)
310      pmatch[i].rm_eo = ovector[i*2+1];        {
311          pmatch[i].rm_so = ovector[i*2];
312          pmatch[i].rm_eo = ovector[i*2+1];
313          }
314        if (allocated_ovector) free(ovector);
315        for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
316      }      }
   if (allocated_ovector) free(ovector);  
   for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;  
317    return 0;    return 0;
318    }    }
319    
# Line 294  else Line 328  else
328      case PCRE_ERROR_BADMAGIC: return REG_INVARG;      case PCRE_ERROR_BADMAGIC: return REG_INVARG;
329      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
330      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
331        case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
332        case PCRE_ERROR_BADUTF8: return REG_INVARG;
333        case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
334      default: return REG_ASSERT;      default: return REG_ASSERT;
335      }      }
336    }    }

Legend:
Removed from v.71  
changed lines
  Added in v.286

  ViewVC Help
Powered by ViewVC 1.1.5