/[pcre]/code/trunk/pcreposix.c
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revision 432 by ph10, Wed Sep 2 16:02:56 2009 UTC revision 521 by ph10, Sat May 22 19:03:35 2010 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) 1997-2009 University of Cambridge             Copyright (c) 1997-2010 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 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    
 #include "pcre.h"  
60  #include "pcre_internal.h"  #include "pcre_internal.h"
61  #include "pcreposix.h"  #include "pcreposix.h"
62    
# Line 70  static const int eint[] = { Line 69  static const int eint[] = {
69    REG_EESCAPE, /* \c at end of pattern */    REG_EESCAPE, /* \c at end of pattern */
70    REG_EESCAPE, /* unrecognized character follows \ */    REG_EESCAPE, /* unrecognized character follows \ */
71    REG_BADBR,   /* numbers out of order in {} quantifier */    REG_BADBR,   /* numbers out of order in {} quantifier */
72    /* 5 */    /* 5 */
73    REG_BADBR,   /* number too big in {} quantifier */    REG_BADBR,   /* number too big in {} quantifier */
74    REG_EBRACK,  /* missing terminating ] for character class */    REG_EBRACK,  /* missing terminating ] for character class */
75    REG_ECTYPE,  /* invalid escape sequence in character class */    REG_ECTYPE,  /* invalid escape sequence in character class */
76    REG_ERANGE,  /* range out of order in character class */    REG_ERANGE,  /* range out of order in character class */
77    REG_BADRPT,  /* nothing to repeat */    REG_BADRPT,  /* nothing to repeat */
78    /* 10 */    /* 10 */
79    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */
80    REG_ASSERT,  /* internal error: unexpected repeat */    REG_ASSERT,  /* internal error: unexpected repeat */
81    REG_BADPAT,  /* unrecognized character after (? */    REG_BADPAT,  /* unrecognized character after (? */
82    REG_BADPAT,  /* POSIX named classes are supported only within a class */    REG_BADPAT,  /* POSIX named classes are supported only within a class */
83    REG_EPAREN,  /* missing ) */    REG_EPAREN,  /* missing ) */
84    /* 15 */    /* 15 */
85    REG_ESUBREG, /* reference to non-existent subpattern */    REG_ESUBREG, /* reference to non-existent subpattern */
86    REG_INVARG,  /* erroffset passed as NULL */    REG_INVARG,  /* erroffset passed as NULL */
87    REG_INVARG,  /* unknown option bit(s) set */    REG_INVARG,  /* unknown option bit(s) set */
88    REG_EPAREN,  /* missing ) after comment */    REG_EPAREN,  /* missing ) after comment */
89    REG_ESIZE,   /* parentheses nested too deeply */    REG_ESIZE,   /* parentheses nested too deeply */
90    /* 20 */    /* 20 */
91    REG_ESIZE,   /* regular expression too large */    REG_ESIZE,   /* regular expression too large */
92    REG_ESPACE,  /* failed to get memory */    REG_ESPACE,  /* failed to get memory */
93    REG_EPAREN,  /* unmatched parentheses */    REG_EPAREN,  /* unmatched parentheses */
94    REG_ASSERT,  /* internal error: code overflow */    REG_ASSERT,  /* internal error: code overflow */
95    REG_BADPAT,  /* unrecognized character after (?< */    REG_BADPAT,  /* unrecognized character after (?< */
96    /* 25 */    /* 25 */
97    REG_BADPAT,  /* lookbehind assertion is not fixed length */    REG_BADPAT,  /* lookbehind assertion is not fixed length */
98    REG_BADPAT,  /* malformed number or name after (?( */    REG_BADPAT,  /* malformed number or name after (?( */
99    REG_BADPAT,  /* conditional group contains more than two branches */    REG_BADPAT,  /* conditional group contains more than two branches */
100    REG_BADPAT,  /* assertion expected after (?( */    REG_BADPAT,  /* assertion expected after (?( */
101    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
102    /* 30 */    /* 30 */
103    REG_ECTYPE,  /* unknown POSIX class name */    REG_ECTYPE,  /* unknown POSIX class name */
104    REG_BADPAT,  /* POSIX collating elements are not supported */    REG_BADPAT,  /* POSIX collating elements are not supported */
105    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 */
106    REG_BADPAT,  /* spare error */    REG_BADPAT,  /* spare error */
107    REG_BADPAT,  /* character value in \x{...} sequence is too large */    REG_BADPAT,  /* character value in \x{...} sequence is too large */
108    /* 35 */    /* 35 */
109    REG_BADPAT,  /* invalid condition (?(0) */    REG_BADPAT,  /* invalid condition (?(0) */
110    REG_BADPAT,  /* \C not allowed in lookbehind assertion */    REG_BADPAT,  /* \C not allowed in lookbehind assertion */
111    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
112    REG_BADPAT,  /* number after (?C is > 255 */    REG_BADPAT,  /* number after (?C is > 255 */
113    REG_BADPAT,  /* closing ) for (?C expected */    REG_BADPAT,  /* closing ) for (?C expected */
114    /* 40 */    /* 40 */
115    REG_BADPAT,  /* recursive call could loop indefinitely */    REG_BADPAT,  /* recursive call could loop indefinitely */
116    REG_BADPAT,  /* unrecognized character after (?P */    REG_BADPAT,  /* unrecognized character after (?P */
117    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
118    REG_BADPAT,  /* two named subpatterns have the same name */    REG_BADPAT,  /* two named subpatterns have the same name */
119    REG_BADPAT,  /* invalid UTF-8 string */    REG_BADPAT,  /* invalid UTF-8 string */
120    /* 45 */    /* 45 */
121    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
122    REG_BADPAT,  /* malformed \P or \p sequence */    REG_BADPAT,  /* malformed \P or \p sequence */
123    REG_BADPAT,  /* unknown property name after \P or \p */    REG_BADPAT,  /* unknown property name after \P or \p */
124    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */
125    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */
126    /* 50 */    /* 50 */
127    REG_BADPAT,  /* repeated subpattern is too long */    REG_BADPAT,  /* repeated subpattern is too long */
128    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) */
129    REG_BADPAT,  /* internal error: overran compiling workspace */    REG_BADPAT,  /* internal error: overran compiling workspace */
130    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */
131    REG_BADPAT,  /* DEFINE group contains more than one branch */    REG_BADPAT,  /* DEFINE group contains more than one branch */
132    /* 55 */    /* 55 */
133    REG_BADPAT,  /* repeating a DEFINE group is not allowed */    REG_BADPAT,  /* repeating a DEFINE group is not allowed */
134    REG_INVARG,  /* inconsistent NEWLINE options */    REG_INVARG,  /* inconsistent NEWLINE options */
135    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 */
136    REG_BADPAT,  /* a numbered reference must not be zero */    REG_BADPAT,  /* a numbered reference must not be zero */
137    REG_BADPAT,  /* (*VERB) with an argument is not supported */    REG_BADPAT,  /* an argument is not allowed for (*ACCEPT), (*FAIL), or (*COMMIT) */
138    /* 60 */    /* 60 */
139    REG_BADPAT,  /* (*VERB) not recognized */    REG_BADPAT,  /* (*VERB) not recognized */
140    REG_BADPAT,  /* number is too big */    REG_BADPAT,  /* number is too big */
141    REG_BADPAT,  /* subpattern name expected */    REG_BADPAT,  /* subpattern name expected */
142    REG_BADPAT,  /* digit expected after (?+ */    REG_BADPAT,  /* digit expected after (?+ */
143    REG_BADPAT   /* ] is an invalid data character in JavaScript compatibility mode */    REG_BADPAT,  /* ] is an invalid data character in JavaScript compatibility mode */
144      /* 65 */
145      REG_BADPAT,  /* different names for subpatterns of the same number are not allowed */
146      REG_BADPAT,  /* (*MARK) must have an argument */
147      REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UCP support */
148  };  };
149    
150  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
# Line 245  if ((cflags & REG_NEWLINE) != 0)  option Line 248  if ((cflags & REG_NEWLINE) != 0)  option
248  if ((cflags & REG_DOTALL) != 0)   options |= PCRE_DOTALL;  if ((cflags & REG_DOTALL) != 0)   options |= PCRE_DOTALL;
249  if ((cflags & REG_NOSUB) != 0)    options |= PCRE_NO_AUTO_CAPTURE;  if ((cflags & REG_NOSUB) != 0)    options |= PCRE_NO_AUTO_CAPTURE;
250  if ((cflags & REG_UTF8) != 0)     options |= PCRE_UTF8;  if ((cflags & REG_UTF8) != 0)     options |= PCRE_UTF8;
251    if ((cflags & REG_UCP) != 0)      options |= PCRE_UCP;
252  if ((cflags & REG_UNGREEDY) != 0) options |= PCRE_UNGREEDY;  if ((cflags & REG_UNGREEDY) != 0) options |= PCRE_UNGREEDY;
253    
254  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
255    &erroffset, NULL);    &erroffset, NULL);
256  preg->re_erroffset = erroffset;  preg->re_erroffset = erroffset;
257    
258  /* Safety: if the error code is too big for the translation vector (which  /* Safety: if the error code is too big for the translation vector (which
259  should not happen, but we all make mistakes), return REG_BADPAT. */  should not happen, but we all make mistakes), return REG_BADPAT. */
260    
261  if (preg->re_pcre == NULL)  if (preg->re_pcre == NULL)
262    {    {
263    return (errorcode < sizeof(eint)/sizeof(const int))?    return (errorcode < sizeof(eint)/sizeof(const int))?
264      eint[errorcode] : REG_BADPAT;      eint[errorcode] : REG_BADPAT;
265    }    }
266    
267  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
268  return 0;  return 0;
# Line 300  if ((eflags & REG_NOTEMPTY) != 0) option Line 304  if ((eflags & REG_NOTEMPTY) != 0) option
304    
305  ((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 */
306    
307  /* When no string data is being returned, or no vector has been passed in which  /* When no string data is being returned, or no vector has been passed in which
308  to put it, ensure that nmatch is zero. Otherwise, ensure the vector for holding  to put it, ensure that nmatch is zero. Otherwise, ensure the vector for holding
309  the return data is large enough. */  the return data is large enough. */
310    
# Line 342  rc = pcre_exec((const pcre *)preg->re_pc Line 346  rc = pcre_exec((const pcre *)preg->re_pc
346    
347  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */
348    
349    /* Successful match */
350    
351  if (rc >= 0)  if (rc >= 0)
352    {    {
353    size_t i;    size_t i;
# Line 358  if (rc >= 0) Line 364  if (rc >= 0)
364    return 0;    return 0;
365    }    }
366    
367  else  /* Unsuccessful match */
368    
369    if (allocated_ovector) free(ovector);
370    switch(rc)
371    {    {
372    if (allocated_ovector) free(ovector);  /* ========================================================================== */
373    switch(rc)    /* These cases are never obeyed. This is a fudge that causes a compile-time
374      {    error if the vector eint, which is indexed by compile-time error number, is
375      case PCRE_ERROR_NOMATCH: return REG_NOMATCH;    not the correct length. It seems to be the only way to do such a check at
376      case PCRE_ERROR_NULL: return REG_INVARG;    compile time, as the sizeof() operator does not work in the C preprocessor.
377      case PCRE_ERROR_BADOPTION: return REG_INVARG;    As all the PCRE_ERROR_xxx values are negative, we can use 0 and 1. */
378      case PCRE_ERROR_BADMAGIC: return REG_INVARG;  
379      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;    case 0:
380      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;    case (sizeof(eint)/sizeof(int) == ERRCOUNT):
381      case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;    return REG_ASSERT;
382      case PCRE_ERROR_BADUTF8: return REG_INVARG;  /* ========================================================================== */
383      case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;  
384      default: return REG_ASSERT;    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
385      }    case PCRE_ERROR_NULL: return REG_INVARG;
386      case PCRE_ERROR_BADOPTION: return REG_INVARG;
387      case PCRE_ERROR_BADMAGIC: return REG_INVARG;
388      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
389      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
390      case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
391      case PCRE_ERROR_BADUTF8: return REG_INVARG;
392      case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
393      default: return REG_ASSERT;
394    }    }
395  }  }
396    

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