/[pcre]/code/trunk/pcreposix.c
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revision 220 by ph10, Thu Aug 16 13:29:39 2007 UTC revision 418 by ph10, Fri Apr 24 09:17:18 2009 UTC
# Line 6  Line 6 
6  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.
7    
8                         Written by Philip Hazel                         Written by Philip Hazel
9             Copyright (c) 1997-2007 University of Cambridge             Copyright (c) 1997-2009 University of Cambridge
10    
11  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
12  Redistribution and use in source and binary forms, with or without  Redistribution and use in source and binary forms, with or without
# Line 43  functions. */ Line 43  functions. */
43    
44    
45  #ifdef HAVE_CONFIG_H  #ifdef HAVE_CONFIG_H
46  #include <config.h>  #include "config.h"
47  #endif  #endif
48    
49    
# Line 57  previously been set. */ Line 57  previously been set. */
57  #  define PCREPOSIX_EXP_DEFN __declspec(dllexport)  #  define PCREPOSIX_EXP_DEFN __declspec(dllexport)
58  #endif  #endif
59    
60  #include <pcre.h>  #include "pcre.h"
61  #include "pcre_internal.h"  #include "pcre_internal.h"
62  #include "pcreposix.h"  #include "pcreposix.h"
63    
64    
   
65  /* Table to translate PCRE compile time error codes into POSIX error codes. */  /* Table to translate PCRE compile time error codes into POSIX error codes. */
66    
67  static const int eint[] = {  static const int eint[] = {
# Line 71  static const int eint[] = { Line 70  static const int eint[] = {
70    REG_EESCAPE, /* \c at end of pattern */    REG_EESCAPE, /* \c at end of pattern */
71    REG_EESCAPE, /* unrecognized character follows \ */    REG_EESCAPE, /* unrecognized character follows \ */
72    REG_BADBR,   /* numbers out of order in {} quantifier */    REG_BADBR,   /* numbers out of order in {} quantifier */
73      /* 5 */
74    REG_BADBR,   /* number too big in {} quantifier */    REG_BADBR,   /* number too big in {} quantifier */
75    REG_EBRACK,  /* missing terminating ] for character class */    REG_EBRACK,  /* missing terminating ] for character class */
76    REG_ECTYPE,  /* invalid escape sequence in character class */    REG_ECTYPE,  /* invalid escape sequence in character class */
77    REG_ERANGE,  /* range out of order in character class */    REG_ERANGE,  /* range out of order in character class */
78    REG_BADRPT,  /* nothing to repeat */    REG_BADRPT,  /* nothing to repeat */
79      /* 10 */
80    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */
81    REG_ASSERT,  /* internal error: unexpected repeat */    REG_ASSERT,  /* internal error: unexpected repeat */
82    REG_BADPAT,  /* unrecognized character after (? */    REG_BADPAT,  /* unrecognized character after (? */
83    REG_BADPAT,  /* POSIX named classes are supported only within a class */    REG_BADPAT,  /* POSIX named classes are supported only within a class */
84    REG_EPAREN,  /* missing ) */    REG_EPAREN,  /* missing ) */
85      /* 15 */
86    REG_ESUBREG, /* reference to non-existent subpattern */    REG_ESUBREG, /* reference to non-existent subpattern */
87    REG_INVARG,  /* erroffset passed as NULL */    REG_INVARG,  /* erroffset passed as NULL */
88    REG_INVARG,  /* unknown option bit(s) set */    REG_INVARG,  /* unknown option bit(s) set */
89    REG_EPAREN,  /* missing ) after comment */    REG_EPAREN,  /* missing ) after comment */
90    REG_ESIZE,   /* parentheses nested too deeply */    REG_ESIZE,   /* parentheses nested too deeply */
91      /* 20 */
92    REG_ESIZE,   /* regular expression too large */    REG_ESIZE,   /* regular expression too large */
93    REG_ESPACE,  /* failed to get memory */    REG_ESPACE,  /* failed to get memory */
94    REG_EPAREN,  /* unmatched brackets */    REG_EPAREN,  /* unmatched parentheses */
95    REG_ASSERT,  /* internal error: code overflow */    REG_ASSERT,  /* internal error: code overflow */
96    REG_BADPAT,  /* unrecognized character after (?< */    REG_BADPAT,  /* unrecognized character after (?< */
97      /* 25 */
98    REG_BADPAT,  /* lookbehind assertion is not fixed length */    REG_BADPAT,  /* lookbehind assertion is not fixed length */
99    REG_BADPAT,  /* malformed number or name after (?( */    REG_BADPAT,  /* malformed number or name after (?( */
100    REG_BADPAT,  /* conditional group contains more than two branches */    REG_BADPAT,  /* conditional group contains more than two branches */
101    REG_BADPAT,  /* assertion expected after (?( */    REG_BADPAT,  /* assertion expected after (?( */
102    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
103      /* 30 */
104    REG_ECTYPE,  /* unknown POSIX class name */    REG_ECTYPE,  /* unknown POSIX class name */
105    REG_BADPAT,  /* POSIX collating elements are not supported */    REG_BADPAT,  /* POSIX collating elements are not supported */
106    REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UTF8 support */    REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UTF8 support */
107    REG_BADPAT,  /* spare error */    REG_BADPAT,  /* spare error */
108    REG_BADPAT,  /* character value in \x{...} sequence is too large */    REG_BADPAT,  /* character value in \x{...} sequence is too large */
109      /* 35 */
110    REG_BADPAT,  /* invalid condition (?(0) */    REG_BADPAT,  /* invalid condition (?(0) */
111    REG_BADPAT,  /* \C not allowed in lookbehind assertion */    REG_BADPAT,  /* \C not allowed in lookbehind assertion */
112    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
113    REG_BADPAT,  /* number after (?C is > 255 */    REG_BADPAT,  /* number after (?C is > 255 */
114    REG_BADPAT,  /* closing ) for (?C expected */    REG_BADPAT,  /* closing ) for (?C expected */
115      /* 40 */
116    REG_BADPAT,  /* recursive call could loop indefinitely */    REG_BADPAT,  /* recursive call could loop indefinitely */
117    REG_BADPAT,  /* unrecognized character after (?P */    REG_BADPAT,  /* unrecognized character after (?P */
118    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
119    REG_BADPAT,  /* two named subpatterns have the same name */    REG_BADPAT,  /* two named subpatterns have the same name */
120    REG_BADPAT,  /* invalid UTF-8 string */    REG_BADPAT,  /* invalid UTF-8 string */
121      /* 45 */
122    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
123    REG_BADPAT,  /* malformed \P or \p sequence */    REG_BADPAT,  /* malformed \P or \p sequence */
124    REG_BADPAT,  /* unknown property name after \P or \p */    REG_BADPAT,  /* unknown property name after \P or \p */
125    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */
126    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */
127      /* 50 */
128    REG_BADPAT,  /* repeated subpattern is too long */    REG_BADPAT,  /* repeated subpattern is too long */
129    REG_BADPAT,  /* octal value is greater than \377 (not in UTF-8 mode) */    REG_BADPAT,  /* octal value is greater than \377 (not in UTF-8 mode) */
130    REG_BADPAT,  /* internal error: overran compiling workspace */    REG_BADPAT,  /* internal error: overran compiling workspace */
131    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */
132    REG_BADPAT,  /* DEFINE group contains more than one branch */    REG_BADPAT,  /* DEFINE group contains more than one branch */
133      /* 55 */
134    REG_BADPAT,  /* repeating a DEFINE group is not allowed */    REG_BADPAT,  /* repeating a DEFINE group is not allowed */
135    REG_INVARG,  /* inconsistent NEWLINE options */    REG_INVARG,  /* inconsistent NEWLINE options */
136    REG_BADPAT,  /* \g is not followed followed by an (optionally braced) non-zero number */    REG_BADPAT,  /* \g is not followed followed by an (optionally braced) non-zero number */
137    REG_BADPAT,  /* (?+ or (?- must be followed by a non-zero number */    REG_BADPAT,  /* a numbered reference must not be zero */
138    REG_BADPAT   /* number is too big */    REG_BADPAT,  /* (*VERB) with an argument is not supported */
139      /* 60 */
140      REG_BADPAT,  /* (*VERB) not recognized */
141      REG_BADPAT,  /* number is too big */
142      REG_BADPAT,  /* subpattern name expected */
143      REG_BADPAT,  /* digit expected after (?+ */
144      REG_BADPAT   /* ] is an invalid data character in JavaScript compatibility mode */
145  };  };
146    
147  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
# Line 158  static const char *const pstring[] = { Line 174  static const char *const pstring[] = {
174  *          Translate error code to string        *  *          Translate error code to string        *
175  *************************************************/  *************************************************/
176    
177  PCREPOSIX_EXP_DEFN size_t  PCREPOSIX_EXP_DEFN size_t PCRE_CALL_CONVENTION
178  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)
179  {  {
180  const char *message, *addmessage;  const char *message, *addmessage;
# Line 193  return length + addlength; Line 209  return length + addlength;
209  *           Free store held by a regex           *  *           Free store held by a regex           *
210  *************************************************/  *************************************************/
211    
212  PCREPOSIX_EXP_DEFN void  PCREPOSIX_EXP_DEFN void PCRE_CALL_CONVENTION
213  regfree(regex_t *preg)  regfree(regex_t *preg)
214  {  {
215  (pcre_free)(preg->re_pcre);  (pcre_free)(preg->re_pcre);
# Line 216  Returns: 0 on success Line 232  Returns: 0 on success
232                various non-zero codes on failure                various non-zero codes on failure
233  */  */
234    
235  PCREPOSIX_EXP_DEFN int  PCREPOSIX_EXP_DEFN int PCRE_CALL_CONVENTION
236  regcomp(regex_t *preg, const char *pattern, int cflags)  regcomp(regex_t *preg, const char *pattern, int cflags)
237  {  {
238  const char *errorptr;  const char *errorptr;
# Line 234  preg->re_pcre = pcre_compile2(pattern, o Line 250  preg->re_pcre = pcre_compile2(pattern, o
250    &erroffset, NULL);    &erroffset, NULL);
251  preg->re_erroffset = erroffset;  preg->re_erroffset = erroffset;
252    
253  if (preg->re_pcre == NULL) return eint[errorcode];  /* Safety: if the error code is too big for the translation vector (which
254    should not happen, but we all make mistakes), return REG_BADPAT. */
255    
256    if (preg->re_pcre == NULL)
257      {
258      return (errorcode < sizeof(eint)/sizeof(const int))?
259        eint[errorcode] : REG_BADPAT;
260      }
261    
262  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
263  return 0;  return 0;
# Line 258  If REG_NOSUB was specified at compile ti Line 281  If REG_NOSUB was specified at compile ti
281  be set. When this is the case, the nmatch and pmatch arguments are ignored, and  be set. When this is the case, the nmatch and pmatch arguments are ignored, and
282  the only result is yes/no/error. */  the only result is yes/no/error. */
283    
284  PCREPOSIX_EXP_DEFN int  PCREPOSIX_EXP_DEFN int PCRE_CALL_CONVENTION
285  regexec(const regex_t *preg, const char *string, size_t nmatch,  regexec(const regex_t *preg, const char *string, size_t nmatch,
286    regmatch_t pmatch[], int eflags)    regmatch_t pmatch[], int eflags)
287  {  {
288  int rc;  int rc, so, eo;
289  int options = 0;  int options = 0;
290  int *ovector = NULL;  int *ovector = NULL;
291  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
# Line 272  BOOL nosub = Line 295  BOOL nosub =
295    
296  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
297  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
298    if ((eflags & REG_NOTEMPTY) != 0) options |= PCRE_NOTEMPTY;
299    
300  ((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 */
301    
# Line 295  else if (nmatch > 0) Line 319  else if (nmatch > 0)
319      }      }
320    }    }
321    
322  rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string, (int)strlen(string),  /* REG_STARTEND is a BSD extension, to allow for non-NUL-terminated strings.
323    The man page from OS X says "REG_STARTEND affects only the location of the
324    string, not how it is matched". That is why the "so" value is used to bump the
325    start location rather than being passed as a PCRE "starting offset". */
326    
327    if ((eflags & REG_STARTEND) != 0)
328      {
329      so = pmatch[0].rm_so;
330      eo = pmatch[0].rm_eo;
331      }
332    else
333      {
334      so = 0;
335      eo = strlen(string);
336      }
337    
338    rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string + so, (eo - so),
339    0, options, ovector, nmatch * 3);    0, options, ovector, nmatch * 3);
340    
341  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */

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