/[pcre]/code/trunk/pcreposix.c
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revision 77 by nigel, Sat Feb 24 21:40:45 2007 UTC revision 345 by ph10, Mon Apr 28 15:10:02 2008 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) 1997-2005 University of Cambridge             Copyright (c) 1997-2008 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 42  POSSIBILITY OF SUCH DAMAGE. Line 42  POSSIBILITY OF SUCH DAMAGE.
42  functions. */  functions. */
43    
44    
45    #ifdef HAVE_CONFIG_H
46    #include "config.h"
47    #endif
48    
49    
50    /* 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    #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    #include "pcre.h"
61  #include "pcre_internal.h"  #include "pcre_internal.h"
62  #include "pcreposix.h"  #include "pcreposix.h"
 #include "stdlib.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. */
# Line 77  static const int eint[] = { Line 91  static const int eint[] = {
91    REG_ASSERT,  /* internal error: code overflow */    REG_ASSERT,  /* internal error: code overflow */
92    REG_BADPAT,  /* unrecognized character after (?< */    REG_BADPAT,  /* unrecognized character after (?< */
93    REG_BADPAT,  /* lookbehind assertion is not fixed length */    REG_BADPAT,  /* lookbehind assertion is not fixed length */
94    REG_BADPAT,  /* malformed number after (?( */    REG_BADPAT,  /* malformed number or name after (?( */
95    REG_BADPAT,  /* conditional group containe more than two branches */    REG_BADPAT,  /* conditional group contains more than two branches */
96    REG_BADPAT,  /* assertion expected after (?( */    REG_BADPAT,  /* assertion expected after (?( */
97    REG_BADPAT,  /* (?R or (?digits must be followed by ) */    REG_BADPAT,  /* (?R or (?[+-]digits must be followed by ) */
98    REG_ECTYPE,  /* unknown POSIX class name */    REG_ECTYPE,  /* unknown POSIX class name */
99    REG_BADPAT,  /* POSIX collating elements are not supported */    REG_BADPAT,  /* POSIX collating elements are not supported */
100    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 */
# Line 93  static const int eint[] = { Line 107  static const int eint[] = {
107    REG_BADPAT,  /* closing ) for (?C expected */    REG_BADPAT,  /* closing ) for (?C expected */
108    REG_BADPAT,  /* recursive call could loop indefinitely */    REG_BADPAT,  /* recursive call could loop indefinitely */
109    REG_BADPAT,  /* unrecognized character after (?P */    REG_BADPAT,  /* unrecognized character after (?P */
110    REG_BADPAT,  /* syntax error after (?P */    REG_BADPAT,  /* syntax error in subpattern name (missing terminator) */
111    REG_BADPAT,  /* two named groups have the same name */    REG_BADPAT,  /* two named subpatterns have the same name */
112    REG_BADPAT,  /* invalid UTF-8 string */    REG_BADPAT,  /* invalid UTF-8 string */
113    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */    REG_BADPAT,  /* support for \P, \p, and \X has not been compiled */
114    REG_BADPAT,  /* malformed \P or \p sequence */    REG_BADPAT,  /* malformed \P or \p sequence */
115    REG_BADPAT   /* unknown property name after \P or \p */    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      REG_BADPAT   /* ] is an invalid data character in JavaScript compatibility mode */
131  };  };
132    
133  /* Table of texts corresponding to POSIX error codes */  /* Table of texts corresponding to POSIX error codes */
# Line 131  static const char *const pstring[] = { Line 160  static const char *const pstring[] = {
160  *          Translate error code to string        *  *          Translate error code to string        *
161  *************************************************/  *************************************************/
162    
163  EXPORT size_t  PCREPOSIX_EXP_DEFN size_t
164  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)
165  {  {
166  const char *message, *addmessage;  const char *message, *addmessage;
# Line 166  return length + addlength; Line 195  return length + addlength;
195  *           Free store held by a regex           *  *           Free store held by a regex           *
196  *************************************************/  *************************************************/
197    
198  EXPORT void  PCREPOSIX_EXP_DEFN void
199  regfree(regex_t *preg)  regfree(regex_t *preg)
200  {  {
201  (pcre_free)(preg->re_pcre);  (pcre_free)(preg->re_pcre);
# Line 189  Returns:      0 on success Line 218  Returns:      0 on success
218                various non-zero codes on failure                various non-zero codes on failure
219  */  */
220    
221  EXPORT int  PCREPOSIX_EXP_DEFN int
222  regcomp(regex_t *preg, const char *pattern, int cflags)  regcomp(regex_t *preg, const char *pattern, int cflags)
223  {  {
224  const char *errorptr;  const char *errorptr;
# Line 197  int erroffset; Line 226  int erroffset;
226  int errorcode;  int errorcode;
227  int options = 0;  int options = 0;
228    
229  if ((cflags & REG_ICASE) != 0) options |= PCRE_CASELESS;  if ((cflags & REG_ICASE) != 0)   options |= PCRE_CASELESS;
230  if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;  if ((cflags & REG_NEWLINE) != 0) options |= PCRE_MULTILINE;
231  if ((cflags & REG_DOTALL) != 0) options |= PCRE_DOTALL;  if ((cflags & REG_DOTALL) != 0)  options |= PCRE_DOTALL;
232    if ((cflags & REG_NOSUB) != 0)   options |= PCRE_NO_AUTO_CAPTURE;
233    if ((cflags & REG_UTF8) != 0)    options |= PCRE_UTF8;
234    
235  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,  preg->re_pcre = pcre_compile2(pattern, options, &errorcode, &errorptr,
236    &erroffset, NULL);    &erroffset, NULL);
# Line 223  substring, so we have to get and release Line 254  substring, so we have to get and release
254  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
255  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
256  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
257  in a macro that can be changed at configure time. */  in a macro that can be changed at configure time.
258    
259    If REG_NOSUB was specified at compile time, the PCRE_NO_AUTO_CAPTURE flag will
260    be set. When this is the case, the nmatch and pmatch arguments are ignored, and
261    the only result is yes/no/error. */
262    
263  EXPORT int  PCREPOSIX_EXP_DEFN int
264  regexec(const regex_t *preg, const char *string, size_t nmatch,  regexec(const regex_t *preg, const char *string, size_t nmatch,
265    regmatch_t pmatch[], int eflags)    regmatch_t pmatch[], int eflags)
266  {  {
267  int rc;  int rc, so, eo;
268  int options = 0;  int options = 0;
269  int *ovector = NULL;  int *ovector = NULL;
270  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];  int small_ovector[POSIX_MALLOC_THRESHOLD * 3];
271  BOOL allocated_ovector = FALSE;  BOOL allocated_ovector = FALSE;
272    BOOL nosub =
273      (((const pcre *)preg->re_pcre)->options & PCRE_NO_AUTO_CAPTURE) != 0;
274    
275  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;  if ((eflags & REG_NOTBOL) != 0) options |= PCRE_NOTBOL;
276  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;  if ((eflags & REG_NOTEOL) != 0) options |= PCRE_NOTEOL;
277    
278  ((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 */
279    
280  if (nmatch > 0)  /* When no string data is being returned, ensure that nmatch is zero.
281    Otherwise, ensure the vector for holding the return data is large enough. */
282    
283    if (nosub) nmatch = 0;
284    
285    else if (nmatch > 0)
286    {    {
287    if (nmatch <= POSIX_MALLOC_THRESHOLD)    if (nmatch <= POSIX_MALLOC_THRESHOLD)
288      {      {
# Line 248  if (nmatch > 0) Line 290  if (nmatch > 0)
290      }      }
291    else    else
292      {      {
293        if (nmatch > INT_MAX/(sizeof(int) * 3)) return REG_ESPACE;
294      ovector = (int *)malloc(sizeof(int) * nmatch * 3);      ovector = (int *)malloc(sizeof(int) * nmatch * 3);
295      if (ovector == NULL) return REG_ESPACE;      if (ovector == NULL) return REG_ESPACE;
296      allocated_ovector = TRUE;      allocated_ovector = TRUE;
297      }      }
298    }    }
299    
300  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.
301    The man page from OS X says "REG_STARTEND affects only the location of the
302    string, not how it is matched". That is why the "so" value is used to bump the
303    start location rather than being passed as a PCRE "starting offset". */
304    
305    if ((eflags & REG_STARTEND) != 0)
306      {
307      so = pmatch[0].rm_so;
308      eo = pmatch[0].rm_eo;
309      }
310    else
311      {
312      so = 0;
313      eo = strlen(string);
314      }
315    
316    rc = pcre_exec((const pcre *)preg->re_pcre, NULL, string + so, (eo - so),
317    0, options, ovector, nmatch * 3);    0, options, ovector, nmatch * 3);
318    
319  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */  if (rc == 0) rc = nmatch;    /* All captured slots were filled in */
# Line 262  if (rc == 0) rc = nmatch;    /* All capt Line 321  if (rc == 0) rc = nmatch;    /* All capt
321  if (rc >= 0)  if (rc >= 0)
322    {    {
323    size_t i;    size_t i;
324    for (i = 0; i < (size_t)rc; i++)    if (!nosub)
325      {      {
326      pmatch[i].rm_so = ovector[i*2];      for (i = 0; i < (size_t)rc; i++)
327      pmatch[i].rm_eo = ovector[i*2+1];        {
328          pmatch[i].rm_so = ovector[i*2];
329          pmatch[i].rm_eo = ovector[i*2+1];
330          }
331        if (allocated_ovector) free(ovector);
332        for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;
333      }      }
   if (allocated_ovector) free(ovector);  
   for (; i < nmatch; i++) pmatch[i].rm_so = pmatch[i].rm_eo = -1;  
334    return 0;    return 0;
335    }    }
336    

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