/[pcre]/code/trunk/pcrecpp.cc
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revision 91 by nigel, Sat Feb 24 21:41:34 2007 UTC revision 200 by ph10, Wed Aug 1 09:10:40 2007 UTC
# Line 29  Line 29 
29  //  //
30  // Author: Sanjay Ghemawat  // Author: Sanjay Ghemawat
31    
32    #ifdef HAVE_CONFIG_H
33    #include <config.h>
34    #endif
35    
36  #include <stdlib.h>  #include <stdlib.h>
37  #include <stdio.h>  #include <stdio.h>
38  #include <ctype.h>  #include <ctype.h>
# Line 37  Line 41 
41  #include <errno.h>  #include <errno.h>
42  #include <string>  #include <string>
43  #include <algorithm>  #include <algorithm>
44  #include "config.h"  
45  // We need this to compile the proper dll on windows/msys.  This is copied  #include "pcrecpp_internal.h"
46  // from pcre_internal.h.  It would probably be better just to include that.  #include <pcre.h>
 #define PCRE_DEFINITION  /* Win32 __declspec(export) trigger for .dll */  
 #include "pcre.h"  
 #include "pcre_stringpiece.h"  
47  #include "pcrecpp.h"  #include "pcrecpp.h"
48    #include "pcre_stringpiece.h"
49    
50    
51  namespace pcrecpp {  namespace pcrecpp {
# Line 53  static const int kMaxArgs = 16; Line 55  static const int kMaxArgs = 16;
55  static const int kVecSize = (1 + kMaxArgs) * 3;  // results + PCRE workspace  static const int kVecSize = (1 + kMaxArgs) * 3;  // results + PCRE workspace
56    
57  // Special object that stands-in for no argument  // Special object that stands-in for no argument
58  Arg no_arg((void*)NULL);  PCRECPP_EXP_DEFN Arg no_arg((void*)NULL);
59    
60  // If a regular expression has no error, its error_ field points here  // If a regular expression has no error, its error_ field points here
61  static const string empty_string;  static const string empty_string;
# Line 61  static const string empty_string; Line 63  static const string empty_string;
63  // If the user doesn't ask for any options, we just use this one  // If the user doesn't ask for any options, we just use this one
64  static RE_Options default_options;  static RE_Options default_options;
65    
66  void RE::Init(const char* pat, const RE_Options* options) {  void RE::Init(const string& pat, const RE_Options* options) {
67    pattern_ = pat;    pattern_ = pat;
68    if (options == NULL) {    if (options == NULL) {
69      options_ = default_options;      options_ = default_options;
# Line 74  void RE::Init(const char* pat, const RE_ Line 76  void RE::Init(const char* pat, const RE_
76    
77    re_partial_ = Compile(UNANCHORED);    re_partial_ = Compile(UNANCHORED);
78    if (re_partial_ != NULL) {    if (re_partial_ != NULL) {
79      // Check for complicated patterns.  The following change is      re_full_ = Compile(ANCHOR_BOTH);
     // conservative in that it may treat some "simple" patterns  
     // as "complex" (e.g., if the vertical bar is in a character  
     // class or is escaped).  But it seems good enough.  
     if (strchr(pat, '|') == NULL) {  
       // Simple pattern: we can use position-based checks to perform  
       // fully anchored matches  
       re_full_ = re_partial_;  
     } else {  
       // We need a special pattern for anchored matches  
       re_full_ = Compile(ANCHOR_BOTH);  
     }  
80    }    }
81  }  }
82    
83    void RE::Cleanup() {
84      if (re_full_ != NULL)         (*pcre_free)(re_full_);
85      if (re_partial_ != NULL)      (*pcre_free)(re_partial_);
86      if (error_ != &empty_string)  delete error_;
87    }
88    
89    
90  RE::~RE() {  RE::~RE() {
91    if (re_full_ != NULL && re_full_ != re_partial_) (*pcre_free)(re_full_);    Cleanup();
   if (re_partial_ != NULL)                         (*pcre_free)(re_partial_);  
   if (error_ != &empty_string)                     delete error_;  
92  }  }
93    
94    
95  pcre* RE::Compile(Anchor anchor) {  pcre* RE::Compile(Anchor anchor) {
96    // First, convert RE_Options into pcre options    // First, convert RE_Options into pcre options
97    int pcre_options = 0;    int pcre_options = 0;
# Line 424  bool RE::Extract(const StringPiece& rewr Line 421  bool RE::Extract(const StringPiece& rewr
421    return Rewrite(out, rewrite, text, vec, matches);    return Rewrite(out, rewrite, text, vec, matches);
422  }  }
423    
424    /*static*/ string RE::QuoteMeta(const StringPiece& unquoted) {
425      string result;
426    
427      // Escape any ascii character not in [A-Za-z_0-9].
428      //
429      // Note that it's legal to escape a character even if it has no
430      // special meaning in a regular expression -- so this function does
431      // that.  (This also makes it identical to the perl function of the
432      // same name; see `perldoc -f quotemeta`.)
433      for (int ii = 0; ii < unquoted.size(); ++ii) {
434        // Note that using 'isalnum' here raises the benchmark time from
435        // 32ns to 58ns:
436        if ((unquoted[ii] < 'a' || unquoted[ii] > 'z') &&
437            (unquoted[ii] < 'A' || unquoted[ii] > 'Z') &&
438            (unquoted[ii] < '0' || unquoted[ii] > '9') &&
439            unquoted[ii] != '_' &&
440            // If this is the part of a UTF8 or Latin1 character, we need
441            // to copy this byte without escaping.  Experimentally this is
442            // what works correctly with the regexp library.
443            !(unquoted[ii] & 128)) {
444          result += '\\';
445        }
446        result += unquoted[ii];
447      }
448    
449      return result;
450    }
451    
452  /***** Actual matching and rewriting code *****/  /***** Actual matching and rewriting code *****/
453    
454  int RE::TryMatch(const StringPiece& text,  int RE::TryMatch(const StringPiece& text,
# Line 437  int RE::TryMatch(const StringPiece& text Line 462  int RE::TryMatch(const StringPiece& text
462      return 0;      return 0;
463    }    }
464    
465    pcre_extra extra = { 0 };    pcre_extra extra = { 0, 0, 0, 0, 0, 0 };
466    if (options_.match_limit() > 0) {    if (options_.match_limit() > 0) {
467      extra.flags |= PCRE_EXTRA_MATCH_LIMIT;      extra.flags |= PCRE_EXTRA_MATCH_LIMIT;
468      extra.match_limit = options_.match_limit();      extra.match_limit = options_.match_limit();
# Line 470  int RE::TryMatch(const StringPiece& text Line 495  int RE::TryMatch(const StringPiece& text
495      rc = vecsize / 2;      rc = vecsize / 2;
496    }    }
497    
   if ((anchor == ANCHOR_BOTH) && (re_full_ == re_partial_)) {  
     // We need an extra check to make sure that the match extended  
     // to the end of the input string  
     assert(vec[0] == 0);                 // PCRE_ANCHORED forces starting match  
     if (vec[1] != text.size()) return 0; // Did not get ending match  
   }  
   
498    return rc;    return rc;
499  }  }
500    
# Line 809  bool Arg::parse_float(const char* str, i Line 827  bool Arg::parse_float(const char* str, i
827      return parse_##name##_radix(str, n, dest, 0);                       \      return parse_##name##_radix(str, n, dest, 0);                       \
828    }    }
829    
830  DEFINE_INTEGER_PARSERS(short);  DEFINE_INTEGER_PARSERS(short)      /*                                   */
831  DEFINE_INTEGER_PARSERS(ushort);  DEFINE_INTEGER_PARSERS(ushort)     /*                                   */
832  DEFINE_INTEGER_PARSERS(int);  DEFINE_INTEGER_PARSERS(int)        /* Don't use semicolons after these  */
833  DEFINE_INTEGER_PARSERS(uint);  DEFINE_INTEGER_PARSERS(uint)       /* statements because they can cause */
834  DEFINE_INTEGER_PARSERS(long);  DEFINE_INTEGER_PARSERS(long)       /* compiler warnings if the checking */
835  DEFINE_INTEGER_PARSERS(ulong);  DEFINE_INTEGER_PARSERS(ulong)      /* level is turned up high enough.   */
836  DEFINE_INTEGER_PARSERS(longlong);  DEFINE_INTEGER_PARSERS(longlong)   /*                                   */
837  DEFINE_INTEGER_PARSERS(ulonglong);  DEFINE_INTEGER_PARSERS(ulonglong)  /*                                   */
838    
839  #undef DEFINE_INTEGER_PARSERS  #undef DEFINE_INTEGER_PARSERS
840    
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