/[pcre]/code/trunk/pcreposix.c
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revision 457 by ph10, Sat Oct 3 16:24:08 2009 UTC revision 545 by ph10, Wed Jun 16 10:51:15 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    
60    /* We include pcre.h before pcre_internal.h so that the PCRE library functions
61    are declared as "import" for Windows by defining PCRE_EXP_DECL as "import".
62    This is needed even though pcre_internal.h itself includes pcre.h, because it
63    does so after it has set PCRE_EXP_DECL to "export" if it is not already set. */
64    
65  #include "pcre.h"  #include "pcre.h"
66  #include "pcre_internal.h"  #include "pcre_internal.h"
67  #include "pcreposix.h"  #include "pcreposix.h"
# Line 70  static const int eint[] = { Line 75  static const int eint[] = {
75    REG_EESCAPE, /* \c at end of pattern */    REG_EESCAPE, /* \c at end of pattern */
76    REG_EESCAPE, /* unrecognized character follows \ */    REG_EESCAPE, /* unrecognized character follows \ */
77    REG_BADBR,   /* numbers out of order in {} quantifier */    REG_BADBR,   /* numbers out of order in {} quantifier */
78    /* 5 */    /* 5 */
79    REG_BADBR,   /* number too big in {} quantifier */    REG_BADBR,   /* number too big in {} quantifier */
80    REG_EBRACK,  /* missing terminating ] for character class */    REG_EBRACK,  /* missing terminating ] for character class */
81    REG_ECTYPE,  /* invalid escape sequence in character class */    REG_ECTYPE,  /* invalid escape sequence in character class */
82    REG_ERANGE,  /* range out of order in character class */    REG_ERANGE,  /* range out of order in character class */
83    REG_BADRPT,  /* nothing to repeat */    REG_BADRPT,  /* nothing to repeat */
84    /* 10 */    /* 10 */
85    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */    REG_BADRPT,  /* operand of unlimited repeat could match the empty string */
86    REG_ASSERT,  /* internal error: unexpected repeat */    REG_ASSERT,  /* internal error: unexpected repeat */
87    REG_BADPAT,  /* unrecognized character after (? */    REG_BADPAT,  /* unrecognized character after (? */
88    REG_BADPAT,  /* POSIX named classes are supported only within a class */    REG_BADPAT,  /* POSIX named classes are supported only within a class */
89    REG_EPAREN,  /* missing ) */    REG_EPAREN,  /* missing ) */
90    /* 15 */    /* 15 */
91    REG_ESUBREG, /* reference to non-existent subpattern */    REG_ESUBREG, /* reference to non-existent subpattern */
92    REG_INVARG,  /* erroffset passed as NULL */    REG_INVARG,  /* erroffset passed as NULL */
93    REG_INVARG,  /* unknown option bit(s) set */    REG_INVARG,  /* unknown option bit(s) set */
94    REG_EPAREN,  /* missing ) after comment */    REG_EPAREN,  /* missing ) after comment */
95    REG_ESIZE,   /* parentheses nested too deeply */    REG_ESIZE,   /* parentheses nested too deeply */
96    /* 20 */    /* 20 */
97    REG_ESIZE,   /* regular expression too large */    REG_ESIZE,   /* regular expression too large */
98    REG_ESPACE,  /* failed to get memory */    REG_ESPACE,  /* failed to get memory */
99    REG_EPAREN,  /* unmatched parentheses */    REG_EPAREN,  /* unmatched parentheses */
100    REG_ASSERT,  /* internal error: code overflow */    REG_ASSERT,  /* internal error: code overflow */
101    REG_BADPAT,  /* unrecognized character after (?< */    REG_BADPAT,  /* unrecognized character after (?< */
102    /* 25 */    /* 25 */
103    REG_BADPAT,  /* lookbehind assertion is not fixed length */    REG_BADPAT,  /* lookbehind assertion is not fixed length */
104    REG_BADPAT,  /* malformed number or name after (?( */    REG_BADPAT,  /* malformed number or name after (?( */
105    REG_BADPAT,  /* conditional group contains more than two branches */    REG_BADPAT,  /* conditional group contains more than two branches */
106    REG_BADPAT,  /* assertion expected after (?( */    REG_BADPAT,  /* assertion expected after (?( */
107    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
108    /* 30 */    /* 30 */
109    REG_ECTYPE,  /* unknown POSIX class name */    REG_ECTYPE,  /* unknown POSIX class name */
110    REG_BADPAT,  /* POSIX collating elements are not supported */    REG_BADPAT,  /* POSIX collating elements are not supported */
111    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 */
112    REG_BADPAT,  /* spare error */    REG_BADPAT,  /* spare error */
113    REG_BADPAT,  /* character value in \x{...} sequence is too large */    REG_BADPAT,  /* character value in \x{...} sequence is too large */
114    /* 35 */    /* 35 */
115    REG_BADPAT,  /* invalid condition (?(0) */    REG_BADPAT,  /* invalid condition (?(0) */
116    REG_BADPAT,  /* \C not allowed in lookbehind assertion */    REG_BADPAT,  /* \C not allowed in lookbehind assertion */
117    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */    REG_EESCAPE, /* PCRE does not support \L, \l, \N, \U, or \u */
118    REG_BADPAT,  /* number after (?C is > 255 */    REG_BADPAT,  /* number after (?C is > 255 */
119    REG_BADPAT,  /* closing ) for (?C expected */    REG_BADPAT,  /* closing ) for (?C expected */
120    /* 40 */    /* 40 */
121    REG_BADPAT,  /* recursive call could loop indefinitely */    REG_BADPAT,  /* recursive call could loop indefinitely */
122    REG_BADPAT,  /* unrecognized character after (?P */    REG_BADPAT,  /* unrecognized character after (?P */
123    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
124    REG_BADPAT,  /* two named subpatterns have the same name */    REG_BADPAT,  /* two named subpatterns have the same name */
125    REG_BADPAT,  /* invalid UTF-8 string */    REG_BADPAT,  /* invalid UTF-8 string */
126    /* 45 */    /* 45 */
127    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
128    REG_BADPAT,  /* malformed \P or \p sequence */    REG_BADPAT,  /* malformed \P or \p sequence */
129    REG_BADPAT,  /* unknown property name after \P or \p */    REG_BADPAT,  /* unknown property name after \P or \p */
130    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */    REG_BADPAT,  /* subpattern name is too long (maximum 32 characters) */
131    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */    REG_BADPAT,  /* too many named subpatterns (maximum 10,000) */
132    /* 50 */    /* 50 */
133    REG_BADPAT,  /* repeated subpattern is too long */    REG_BADPAT,  /* repeated subpattern is too long */
134    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) */
135    REG_BADPAT,  /* internal error: overran compiling workspace */    REG_BADPAT,  /* internal error: overran compiling workspace */
136    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */    REG_BADPAT,  /* internal error: previously-checked referenced subpattern not found */
137    REG_BADPAT,  /* DEFINE group contains more than one branch */    REG_BADPAT,  /* DEFINE group contains more than one branch */
138    /* 55 */    /* 55 */
139    REG_BADPAT,  /* repeating a DEFINE group is not allowed */    REG_BADPAT,  /* repeating a DEFINE group is not allowed */
140    REG_INVARG,  /* inconsistent NEWLINE options */    REG_INVARG,  /* inconsistent NEWLINE options */
141    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 */
142    REG_BADPAT,  /* a numbered reference must not be zero */    REG_BADPAT,  /* a numbered reference must not be zero */
143    REG_BADPAT,  /* (*VERB) with an argument is not supported */    REG_BADPAT,  /* an argument is not allowed for (*ACCEPT), (*FAIL), or (*COMMIT) */
144    /* 60 */    /* 60 */
145    REG_BADPAT,  /* (*VERB) not recognized */    REG_BADPAT,  /* (*VERB) not recognized */
146    REG_BADPAT,  /* number is too big */    REG_BADPAT,  /* number is too big */
147    REG_BADPAT,  /* subpattern name expected */    REG_BADPAT,  /* subpattern name expected */
148    REG_BADPAT,  /* digit expected after (?+ */    REG_BADPAT,  /* digit expected after (?+ */
149    REG_BADPAT,  /* ] is an invalid data character in JavaScript compatibility mode */    REG_BADPAT,  /* ] is an invalid data character in JavaScript compatibility mode */
150    /* 65 */    /* 65 */
151    REG_BADPAT   /* different names for subpatterns of the same number are not allowed */    REG_BADPAT,  /* different names for subpatterns of the same number are not allowed */
152      REG_BADPAT,  /* (*MARK) must have an argument */
153      REG_INVARG,  /* this version of PCRE is not compiled with PCRE_UCP support */
154  };  };
155    
156  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
# Line 247  if ((cflags & REG_NEWLINE) != 0)  option Line 254  if ((cflags & REG_NEWLINE) != 0)  option
254  if ((cflags & REG_DOTALL) != 0)   options |= PCRE_DOTALL;  if ((cflags & REG_DOTALL) != 0)   options |= PCRE_DOTALL;
255  if ((cflags & REG_NOSUB) != 0)    options |= PCRE_NO_AUTO_CAPTURE;  if ((cflags & REG_NOSUB) != 0)    options |= PCRE_NO_AUTO_CAPTURE;
256  if ((cflags & REG_UTF8) != 0)     options |= PCRE_UTF8;  if ((cflags & REG_UTF8) != 0)     options |= PCRE_UTF8;
257    if ((cflags & REG_UCP) != 0)      options |= PCRE_UCP;
258  if ((cflags & REG_UNGREEDY) != 0) options |= PCRE_UNGREEDY;  if ((cflags & REG_UNGREEDY) != 0) options |= PCRE_UNGREEDY;
259    
260  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
261    &erroffset, NULL);    &erroffset, NULL);
262  preg->re_erroffset = erroffset;  preg->re_erroffset = erroffset;
263    
264  /* 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
265  should not happen, but we all make mistakes), return REG_BADPAT. */  should not happen, but we all make mistakes), return REG_BADPAT. */
266    
267  if (preg->re_pcre == NULL)  if (preg->re_pcre == NULL)
268    {    {
269    return (errorcode < sizeof(eint)/sizeof(const int))?    return (errorcode < sizeof(eint)/sizeof(const int))?
270      eint[errorcode] : REG_BADPAT;      eint[errorcode] : REG_BADPAT;
271    }    }
272    
273  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);  preg->re_nsub = pcre_info((const pcre *)preg->re_pcre, NULL, NULL);
274  return 0;  return 0;
# Line 302  if ((eflags & REG_NOTEMPTY) != 0) option Line 310  if ((eflags & REG_NOTEMPTY) != 0) option
310    
311  ((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 */
312    
313  /* 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
314  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
315  the return data is large enough. */  the return data is large enough. */
316    
# Line 336  if ((eflags & REG_STARTEND) != 0) Line 344  if ((eflags & REG_STARTEND) != 0)
344  else  else
345    {    {
346    so = 0;    so = 0;
347    eo = strlen(string);    eo = (int)strlen(string);
348    }    }
349    
350  rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string + so, (eo - so),  rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string + so, (eo - so),
351    0, options, ovector, nmatch * 3);    0, options, ovector, (int)(nmatch * 3));
352    
353  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */  if (rc == 0) rc = (int)nmatch;    /* All captured slots were filled in */
354    
355    /* Successful match */
356    
357  if (rc >= 0)  if (rc >= 0)
358    {    {
# Line 360  if (rc >= 0) Line 370  if (rc >= 0)
370    return 0;    return 0;
371    }    }
372    
373  else  /* Unsuccessful match */
374    
375    if (allocated_ovector) free(ovector);
376    switch(rc)
377    {    {
378    if (allocated_ovector) free(ovector);  /* ========================================================================== */
379    switch(rc)    /* These cases are never obeyed. This is a fudge that causes a compile-time
380      {    error if the vector eint, which is indexed by compile-time error number, is
381      case PCRE_ERROR_NOMATCH: return REG_NOMATCH;    not the correct length. It seems to be the only way to do such a check at
382      case PCRE_ERROR_NULL: return REG_INVARG;    compile time, as the sizeof() operator does not work in the C preprocessor.
383      case PCRE_ERROR_BADOPTION: return REG_INVARG;    As all the PCRE_ERROR_xxx values are negative, we can use 0 and 1. */
384      case PCRE_ERROR_BADMAGIC: return REG_INVARG;  
385      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;    case 0:
386      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;    case (sizeof(eint)/sizeof(int) == ERRCOUNT):
387      case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;    return REG_ASSERT;
388      case PCRE_ERROR_BADUTF8: return REG_INVARG;  /* ========================================================================== */
389      case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;  
390      default: return REG_ASSERT;    case PCRE_ERROR_NOMATCH: return REG_NOMATCH;
391      }    case PCRE_ERROR_NULL: return REG_INVARG;
392      case PCRE_ERROR_BADOPTION: return REG_INVARG;
393      case PCRE_ERROR_BADMAGIC: return REG_INVARG;
394      case PCRE_ERROR_UNKNOWN_NODE: return REG_ASSERT;
395      case PCRE_ERROR_NOMEMORY: return REG_ESPACE;
396      case PCRE_ERROR_MATCHLIMIT: return REG_ESPACE;
397      case PCRE_ERROR_BADUTF8: return REG_INVARG;
398      case PCRE_ERROR_BADUTF8_OFFSET: return REG_INVARG;
399      default: return REG_ASSERT;
400    }    }
401  }  }
402    

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