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revision 81 by nigel, Sat Feb 24 21:40:59 2007 UTC revision 308 by ph10, Mon Jan 21 14:57:19 2008 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"
 // from pcre_internal.h.  It would probably be better just to include that.  
 #define PCRE_DEFINITION  /* Win32 __declspec(export) trigger for .dll */  
46  #include "pcre.h"  #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);  Arg RE::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 332  bool RE::Replace(const StringPiece& rewr Line 329  bool RE::Replace(const StringPiece& rewr
329    return true;    return true;
330  }  }
331    
332    // Returns PCRE_NEWLINE_CRLF, PCRE_NEWLINE_CR, or PCRE_NEWLINE_LF.
333    // Note that PCRE_NEWLINE_CRLF is defined to be P_N_CR | P_N_LF.
334    // Modified by PH to add PCRE_NEWLINE_ANY and PCRE_NEWLINE_ANYCRLF.
335    
336    static int NewlineMode(int pcre_options) {
337      // TODO: if we can make it threadsafe, cache this var
338      int newline_mode = 0;
339      /* if (newline_mode) return newline_mode; */  // do this once it's cached
340      if (pcre_options & (PCRE_NEWLINE_CRLF|PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|
341                          PCRE_NEWLINE_ANY|PCRE_NEWLINE_ANYCRLF)) {
342        newline_mode = (pcre_options &
343                        (PCRE_NEWLINE_CRLF|PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|
344                         PCRE_NEWLINE_ANY|PCRE_NEWLINE_ANYCRLF));
345      } else {
346        int newline;
347        pcre_config(PCRE_CONFIG_NEWLINE, &newline);
348        if (newline == 10)
349          newline_mode = PCRE_NEWLINE_LF;
350        else if (newline == 13)
351          newline_mode = PCRE_NEWLINE_CR;
352        else if (newline == 3338)
353          newline_mode = PCRE_NEWLINE_CRLF;
354        else if (newline == -1)
355          newline_mode = PCRE_NEWLINE_ANY;
356        else if (newline == -2)
357          newline_mode = PCRE_NEWLINE_ANYCRLF;
358        else
359          assert("" == "Unexpected return value from pcre_config(NEWLINE)");
360      }
361      return newline_mode;
362    }
363    
364  int RE::GlobalReplace(const StringPiece& rewrite,  int RE::GlobalReplace(const StringPiece& rewrite,
365                        string *str) const {                        string *str) const {
366    int count = 0;    int count = 0;
# Line 340  int RE::GlobalReplace(const StringPiece& Line 369  int RE::GlobalReplace(const StringPiece&
369    int start = 0;    int start = 0;
370    int lastend = -1;    int lastend = -1;
371    
372    for (; start <= static_cast<int>(str->length()); count++) {    while (start <= static_cast<int>(str->length())) {
373      int matches = TryMatch(*str, start, UNANCHORED, vec, kVecSize);      int matches = TryMatch(*str, start, UNANCHORED, vec, kVecSize);
374      if (matches <= 0)      if (matches <= 0)
375        break;        break;
# Line 350  int RE::GlobalReplace(const StringPiece& Line 379  int RE::GlobalReplace(const StringPiece&
379      if (matchstart == matchend && matchstart == lastend) {      if (matchstart == matchend && matchstart == lastend) {
380        // advance one character if we matched an empty string at the same        // advance one character if we matched an empty string at the same
381        // place as the last match occurred        // place as the last match occurred
382        if (start < static_cast<int>(str->length()))        matchend = start + 1;
383          out.push_back((*str)[start]);        // If the current char is CR and we're in CRLF mode, skip LF too.
384        start++;        // Note it's better to call pcre_fullinfo() than to examine
385          // all_options(), since options_ could have changed bewteen
386          // compile-time and now, but this is simpler and safe enough.
387          // Modified by PH to add ANY and ANYCRLF.
388          if (start+1 < static_cast<int>(str->length()) &&
389              (*str)[start] == '\r' && (*str)[start+1] == '\n' &&
390              (NewlineMode(options_.all_options()) == PCRE_NEWLINE_CRLF ||
391               NewlineMode(options_.all_options()) == PCRE_NEWLINE_ANY ||
392               NewlineMode(options_.all_options()) == PCRE_NEWLINE_ANYCRLF)
393              ) {
394            matchend++;
395          }
396          // We also need to advance more than one char if we're in utf8 mode.
397    #ifdef SUPPORT_UTF8
398          if (options_.utf8()) {
399            while (matchend < static_cast<int>(str->length()) &&
400                   ((*str)[matchend] & 0xc0) == 0x80)
401              matchend++;
402          }
403    #endif
404          if (matchend <= static_cast<int>(str->length()))
405            out.append(*str, start, matchend - start);
406          start = matchend;
407      } else {      } else {
408        out.append(*str, start, matchstart - start);        out.append(*str, start, matchstart - start);
409        Rewrite(&out, rewrite, *str, vec, matches);        Rewrite(&out, rewrite, *str, vec, matches);
# Line 382  bool RE::Extract(const StringPiece& rewr Line 433  bool RE::Extract(const StringPiece& rewr
433    return Rewrite(out, rewrite, text, vec, matches);    return Rewrite(out, rewrite, text, vec, matches);
434  }  }
435    
436    /*static*/ string RE::QuoteMeta(const StringPiece& unquoted) {
437      string result;
438    
439      // Escape any ascii character not in [A-Za-z_0-9].
440      //
441      // Note that it's legal to escape a character even if it has no
442      // special meaning in a regular expression -- so this function does
443      // that.  (This also makes it identical to the perl function of the
444      // same name; see `perldoc -f quotemeta`.)
445      for (int ii = 0; ii < unquoted.size(); ++ii) {
446        // Note that using 'isalnum' here raises the benchmark time from
447        // 32ns to 58ns:
448        if ((unquoted[ii] < 'a' || unquoted[ii] > 'z') &&
449            (unquoted[ii] < 'A' || unquoted[ii] > 'Z') &&
450            (unquoted[ii] < '0' || unquoted[ii] > '9') &&
451            unquoted[ii] != '_' &&
452            // If this is the part of a UTF8 or Latin1 character, we need
453            // to copy this byte without escaping.  Experimentally this is
454            // what works correctly with the regexp library.
455            !(unquoted[ii] & 128)) {
456          result += '\\';
457        }
458        result += unquoted[ii];
459      }
460    
461      return result;
462    }
463    
464  /***** Actual matching and rewriting code *****/  /***** Actual matching and rewriting code *****/
465    
466  int RE::TryMatch(const StringPiece& text,  int RE::TryMatch(const StringPiece& text,
# Line 395  int RE::TryMatch(const StringPiece& text Line 474  int RE::TryMatch(const StringPiece& text
474      return 0;      return 0;
475    }    }
476    
477    pcre_extra extra = { 0 };    pcre_extra extra = { 0, 0, 0, 0, 0, 0 };
478    if (options_.match_limit() > 0) {    if (options_.match_limit() > 0) {
479      extra.flags = PCRE_EXTRA_MATCH_LIMIT;      extra.flags |= PCRE_EXTRA_MATCH_LIMIT;
480      extra.match_limit = options_.match_limit();      extra.match_limit = options_.match_limit();
481    }    }
482      if (options_.match_limit_recursion() > 0) {
483        extra.flags |= PCRE_EXTRA_MATCH_LIMIT_RECURSION;
484        extra.match_limit_recursion = options_.match_limit_recursion();
485      }
486    int rc = pcre_exec(re,              // The regular expression object    int rc = pcre_exec(re,              // The regular expression object
487                       &extra,                       &extra,
488                       text.data(),                       (text.data() == NULL) ? "" : text.data(),
489                       text.size(),                       text.size(),
490                       startpos,                       startpos,
491                       (anchor == UNANCHORED) ? 0 : PCRE_ANCHORED,                       (anchor == UNANCHORED) ? 0 : PCRE_ANCHORED,
# Line 424  int RE::TryMatch(const StringPiece& text Line 507  int RE::TryMatch(const StringPiece& text
507      rc = vecsize / 2;      rc = vecsize / 2;
508    }    }
509    
   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  
   }  
   
510    return rc;    return rc;
511  }  }
512    
# Line 449  bool RE::DoMatchImpl(const StringPiece& Line 525  bool RE::DoMatchImpl(const StringPiece&
525    
526    *consumed = vec[1];    *consumed = vec[1];
527    
528    if (args == NULL) {    if (n == 0 || args == NULL) {
529      // We are not interested in results      // We are not interested in results
530      return true;      return true;
531    }    }
532    
533      if (NumberOfCapturingGroups() < n) {
534        // RE has fewer capturing groups than number of arg pointers passed in
535        return false;
536      }
537    
538    // If we got here, we must have matched the whole pattern.    // If we got here, we must have matched the whole pattern.
539    // We do not need (can not do) any more checks on the value of 'matches' here    // We do not need (can not do) any more checks on the value of 'matches' here
540    // -- see the comment for TryMatch.    // -- see the comment for TryMatch.
# Line 517  bool RE::Rewrite(string *out, const Stri Line 598  bool RE::Rewrite(string *out, const Stri
598    
599  // Return the number of capturing subpatterns, or -1 if the  // Return the number of capturing subpatterns, or -1 if the
600  // regexp wasn't valid on construction.  // regexp wasn't valid on construction.
601  int RE::NumberOfCapturingGroups() {  int RE::NumberOfCapturingGroups() const {
602    if (re_partial_ == NULL) return -1;    if (re_partial_ == NULL) return -1;
603    
604    int result;    int result;
# Line 537  bool Arg::parse_null(const char* str, in Line 618  bool Arg::parse_null(const char* str, in
618  }  }
619    
620  bool Arg::parse_string(const char* str, int n, void* dest) {  bool Arg::parse_string(const char* str, int n, void* dest) {
621      if (dest == NULL) return true;
622    reinterpret_cast<string*>(dest)->assign(str, n);    reinterpret_cast<string*>(dest)->assign(str, n);
623    return true;    return true;
624  }  }
625    
626  bool Arg::parse_stringpiece(const char* str, int n, void* dest) {  bool Arg::parse_stringpiece(const char* str, int n, void* dest) {
627      if (dest == NULL) return true;
628    reinterpret_cast<StringPiece*>(dest)->set(str, n);    reinterpret_cast<StringPiece*>(dest)->set(str, n);
629    return true;    return true;
630  }  }
631    
632  bool Arg::parse_char(const char* str, int n, void* dest) {  bool Arg::parse_char(const char* str, int n, void* dest) {
633    if (n != 1) return false;    if (n != 1) return false;
634      if (dest == NULL) return true;
635    *(reinterpret_cast<char*>(dest)) = str[0];    *(reinterpret_cast<char*>(dest)) = str[0];
636    return true;    return true;
637  }  }
638    
639  bool Arg::parse_uchar(const char* str, int n, void* dest) {  bool Arg::parse_uchar(const char* str, int n, void* dest) {
640    if (n != 1) return false;    if (n != 1) return false;
641      if (dest == NULL) return true;
642    *(reinterpret_cast<unsigned char*>(dest)) = str[0];    *(reinterpret_cast<unsigned char*>(dest)) = str[0];
643    return true;    return true;
644  }  }
# Line 602  bool Arg::parse_long_radix(const char* s Line 687  bool Arg::parse_long_radix(const char* s
687    long r = strtol(str, &end, radix);    long r = strtol(str, &end, radix);
688    if (end != str + n) return false;   // Leftover junk    if (end != str + n) return false;   // Leftover junk
689    if (errno) return false;    if (errno) return false;
690      if (dest == NULL) return true;
691    *(reinterpret_cast<long*>(dest)) = r;    *(reinterpret_cast<long*>(dest)) = r;
692    return true;    return true;
693  }  }
# Line 613  bool Arg::parse_ulong_radix(const char* Line 699  bool Arg::parse_ulong_radix(const char*
699    if (n == 0) return false;    if (n == 0) return false;
700    char buf[kMaxNumberLength+1];    char buf[kMaxNumberLength+1];
701    str = TerminateNumber(buf, str, n);    str = TerminateNumber(buf, str, n);
702      if (str[0] == '-') return false;    // strtoul() on a negative number?!
703    char* end;    char* end;
704    errno = 0;    errno = 0;
705    unsigned long r = strtoul(str, &end, radix);    unsigned long r = strtoul(str, &end, radix);
706    if (end != str + n) return false;   // Leftover junk    if (end != str + n) return false;   // Leftover junk
707    if (errno) return false;    if (errno) return false;
708      if (dest == NULL) return true;
709    *(reinterpret_cast<unsigned long*>(dest)) = r;    *(reinterpret_cast<unsigned long*>(dest)) = r;
710    return true;    return true;
711  }  }
# Line 629  bool Arg::parse_short_radix(const char* Line 717  bool Arg::parse_short_radix(const char*
717    long r;    long r;
718    if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse    if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse
719    if (r < SHRT_MIN || r > SHRT_MAX) return false;       // Out of range    if (r < SHRT_MIN || r > SHRT_MAX) return false;       // Out of range
720    *(reinterpret_cast<short*>(dest)) = r;    if (dest == NULL) return true;
721      *(reinterpret_cast<short*>(dest)) = static_cast<short>(r);
722    return true;    return true;
723  }  }
724    
# Line 640  bool Arg::parse_ushort_radix(const char* Line 729  bool Arg::parse_ushort_radix(const char*
729    unsigned long r;    unsigned long r;
730    if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse    if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse
731    if (r > USHRT_MAX) return false;                      // Out of range    if (r > USHRT_MAX) return false;                      // Out of range
732    *(reinterpret_cast<unsigned short*>(dest)) = r;    if (dest == NULL) return true;
733      *(reinterpret_cast<unsigned short*>(dest)) = static_cast<unsigned short>(r);
734    return true;    return true;
735  }  }
736    
# Line 651  bool Arg::parse_int_radix(const char* st Line 741  bool Arg::parse_int_radix(const char* st
741    long r;    long r;
742    if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse    if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse
743    if (r < INT_MIN || r > INT_MAX) return false;         // Out of range    if (r < INT_MIN || r > INT_MAX) return false;         // Out of range
744      if (dest == NULL) return true;
745    *(reinterpret_cast<int*>(dest)) = r;    *(reinterpret_cast<int*>(dest)) = r;
746    return true;    return true;
747  }  }
# Line 662  bool Arg::parse_uint_radix(const char* s Line 753  bool Arg::parse_uint_radix(const char* s
753    unsigned long r;    unsigned long r;
754    if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse    if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse
755    if (r > UINT_MAX) return false;                       // Out of range    if (r > UINT_MAX) return false;                       // Out of range
756      if (dest == NULL) return true;
757    *(reinterpret_cast<unsigned int*>(dest)) = r;    *(reinterpret_cast<unsigned int*>(dest)) = r;
758    return true;    return true;
759  }  }
# Line 682  bool Arg::parse_longlong_radix(const cha Line 774  bool Arg::parse_longlong_radix(const cha
774    long long r = strtoq(str, &end, radix);    long long r = strtoq(str, &end, radix);
775  #elif defined HAVE_STRTOLL  #elif defined HAVE_STRTOLL
776    long long r = strtoll(str, &end, radix);    long long r = strtoll(str, &end, radix);
777    #elif defined HAVE__STRTOI64
778      long long r = _strtoi64(str, &end, radix);
779  #else  #else
780  #error parse_longlong_radix: cannot convert input to a long-long  #error parse_longlong_radix: cannot convert input to a long-long
781  #endif  #endif
782    if (end != str + n) return false;   // Leftover junk    if (end != str + n) return false;   // Leftover junk
783    if (errno) return false;    if (errno) return false;
784      if (dest == NULL) return true;
785    *(reinterpret_cast<long long*>(dest)) = r;    *(reinterpret_cast<long long*>(dest)) = r;
786    return true;    return true;
787  #endif   /* HAVE_LONG_LONG */  #endif   /* HAVE_LONG_LONG */
# Line 702  bool Arg::parse_ulonglong_radix(const ch Line 797  bool Arg::parse_ulonglong_radix(const ch
797    if (n == 0) return false;    if (n == 0) return false;
798    char buf[kMaxNumberLength+1];    char buf[kMaxNumberLength+1];
799    str = TerminateNumber(buf, str, n);    str = TerminateNumber(buf, str, n);
800      if (str[0] == '-') return false;    // strtoull() on a negative number?!
801    char* end;    char* end;
802    errno = 0;    errno = 0;
803  #if defined HAVE_STRTOQ  #if defined HAVE_STRTOQ
804    unsigned long long r = strtouq(str, &end, radix);    unsigned long long r = strtouq(str, &end, radix);
805  #elif defined HAVE_STRTOLL  #elif defined HAVE_STRTOLL
806    unsigned long long r = strtoull(str, &end, radix);    unsigned long long r = strtoull(str, &end, radix);
807    #elif defined HAVE__STRTOI64
808      unsigned long long r = _strtoui64(str, &end, radix);
809  #else  #else
810  #error parse_ulonglong_radix: cannot convert input to a long-long  #error parse_ulonglong_radix: cannot convert input to a long-long
811  #endif  #endif
812    if (end != str + n) return false;   // Leftover junk    if (end != str + n) return false;   // Leftover junk
813    if (errno) return false;    if (errno) return false;
814      if (dest == NULL) return true;
815    *(reinterpret_cast<unsigned long long*>(dest)) = r;    *(reinterpret_cast<unsigned long long*>(dest)) = r;
816    return true;    return true;
817  #endif   /* HAVE_UNSIGNED_LONG_LONG */  #endif   /* HAVE_UNSIGNED_LONG_LONG */
# Line 730  bool Arg::parse_double(const char* str, Line 829  bool Arg::parse_double(const char* str,
829    double r = strtod(buf, &end);    double r = strtod(buf, &end);
830    if (end != buf + n) return false;   // Leftover junk    if (end != buf + n) return false;   // Leftover junk
831    if (errno) return false;    if (errno) return false;
832      if (dest == NULL) return true;
833    *(reinterpret_cast<double*>(dest)) = r;    *(reinterpret_cast<double*>(dest)) = r;
834    return true;    return true;
835  }  }
# Line 737  bool Arg::parse_double(const char* str, Line 837  bool Arg::parse_double(const char* str,
837  bool Arg::parse_float(const char* str, int n, void* dest) {  bool Arg::parse_float(const char* str, int n, void* dest) {
838    double r;    double r;
839    if (!parse_double(str, n, &r)) return false;    if (!parse_double(str, n, &r)) return false;
840      if (dest == NULL) return true;
841    *(reinterpret_cast<float*>(dest)) = static_cast<float>(r);    *(reinterpret_cast<float*>(dest)) = static_cast<float>(r);
842    return true;    return true;
843  }  }
# Line 756  bool Arg::parse_float(const char* str, i Line 857  bool Arg::parse_float(const char* str, i
857      return parse_##name##_radix(str, n, dest, 0);                       \      return parse_##name##_radix(str, n, dest, 0);                       \
858    }    }
859    
860  DEFINE_INTEGER_PARSERS(short);  DEFINE_INTEGER_PARSERS(short)      /*                                   */
861  DEFINE_INTEGER_PARSERS(ushort);  DEFINE_INTEGER_PARSERS(ushort)     /*                                   */
862  DEFINE_INTEGER_PARSERS(int);  DEFINE_INTEGER_PARSERS(int)        /* Don't use semicolons after these  */
863  DEFINE_INTEGER_PARSERS(uint);  DEFINE_INTEGER_PARSERS(uint)       /* statements because they can cause */
864  DEFINE_INTEGER_PARSERS(long);  DEFINE_INTEGER_PARSERS(long)       /* compiler warnings if the checking */
865  DEFINE_INTEGER_PARSERS(ulong);  DEFINE_INTEGER_PARSERS(ulong)      /* level is turned up high enough.   */
866  DEFINE_INTEGER_PARSERS(longlong);  DEFINE_INTEGER_PARSERS(longlong)   /*                                   */
867  DEFINE_INTEGER_PARSERS(ulonglong);  DEFINE_INTEGER_PARSERS(ulonglong)  /*                                   */
868    
869  #undef DEFINE_INTEGER_PARSERS  #undef DEFINE_INTEGER_PARSERS
870    

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