Load pcre-6.0 into code/trunk.

git-svn-id: svn://vcs.exim.org/pcre/code/trunk@77 2f5784b3-3f2a-0410-8824-cb99058d5e15

1 files changed, 770 insertions, 0 deletions

diff --git a/pcrecpp.cc b/pcrecpp.cc
new file mode 100644
index 0000000..0876abf
--- /dev/null
+++ b/pcrecpp.cc
@@ -0,0 +1,770 @@
+// Copyright (c) 2005, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: Sanjay Ghemawat
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <limits.h>      /* for SHRT_MIN, USHRT_MAX, etc */
+#include <assert.h>
+#include <errno.h>
+#include <string>
+#include "config.h"
+// We need this to compile the proper dll on windows/msys.  This is copied
+// from pcre_internal.h.  It would probably be better just to include that.
+#define PCRE_DEFINITION  /* Win32 __declspec(export) trigger for .dll */
+#include "pcre.h"
+#include "pcre_stringpiece.h"
+#include "pcrecpp.h"
+
+
+namespace pcrecpp {
+
+// Maximum number of args we can set
+static const int kMaxArgs = 16;
+static const int kVecSize = (1 + kMaxArgs) * 3;  // results + PCRE workspace
+
+// Special object that stands-in for no argument
+Arg no_arg((void*)NULL);
+
+// If a regular expression has no error, its error_ field points here
+static const string empty_string;
+
+// If the user doesn't ask for any options, we just use this one
+static RE_Options default_options;
+
+void RE::Init(const char* pat, const RE_Options* options) {
+  pattern_ = pat;
+  if (options == NULL) {
+    options_ = default_options;
+  } else {
+    options_ = *options;
+  }
+  error_ = &empty_string;
+  re_full_ = NULL;
+  re_partial_ = NULL;
+
+  re_partial_ = Compile(UNANCHORED);
+  if (re_partial_ != NULL) {
+    // Check for complicated patterns.  The following change is
+    // 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);
+    }
+  }
+}
+
+RE::~RE() {
+  if (re_full_ != NULL && re_full_ != re_partial_) (*pcre_free)(re_full_);
+  if (re_partial_ != NULL)                         (*pcre_free)(re_partial_);
+  if (error_ != &empty_string)                     delete error_;
+}
+
+pcre* RE::Compile(Anchor anchor) {
+  // First, convert RE_Options into pcre options
+  int pcre_options = 0;
+  if (options_.utf8())
+    pcre_options |= PCRE_UTF8;
+
+  // Special treatment for anchoring.  This is needed because at
+  // runtime pcre only provides an option for anchoring at the
+  // beginning of a string (unless you use offset).
+  //
+  // There are three types of anchoring we want:
+  //    UNANCHORED      Compile the original pattern, and use
+  //                    a pcre unanchored match.
+  //    ANCHOR_START    Compile the original pattern, and use
+  //                    a pcre anchored match.
+  //    ANCHOR_BOTH     Tack a "\z" to the end of the original pattern
+  //                    and use a pcre anchored match.
+
+  const char* compile_error;
+  int eoffset;
+  pcre* re;
+  if (anchor != ANCHOR_BOTH) {
+    re = pcre_compile(pattern_.c_str(), pcre_options,
+                      &compile_error, &eoffset, NULL);
+  } else {
+    // Tack a '\z' at the end of RE.  Parenthesize it first so that
+    // the '\z' applies to all top-level alternatives in the regexp.
+    string wrapped = "(?:";  // A non-counting grouping operator
+    wrapped += pattern_;
+    wrapped += ")\\z";
+    re = pcre_compile(wrapped.c_str(), pcre_options,
+                      &compile_error, &eoffset, NULL);
+  }
+  if (re == NULL) {
+    if (error_ == &empty_string) error_ = new string(compile_error);
+  }
+  return re;
+}
+
+/***** Matching interfaces *****/
+
+bool RE::FullMatch(const StringPiece& text,
+                   const Arg& ptr1,
+                   const Arg& ptr2,
+                   const Arg& ptr3,
+                   const Arg& ptr4,
+                   const Arg& ptr5,
+                   const Arg& ptr6,
+                   const Arg& ptr7,
+                   const Arg& ptr8,
+                   const Arg& ptr9,
+                   const Arg& ptr10,
+                   const Arg& ptr11,
+                   const Arg& ptr12,
+                   const Arg& ptr13,
+                   const Arg& ptr14,
+                   const Arg& ptr15,
+                   const Arg& ptr16) const {
+  const Arg* args[kMaxArgs];
+  int n = 0;
+  if (&ptr1  == &no_arg) goto done; args[n++] = &ptr1;
+  if (&ptr2  == &no_arg) goto done; args[n++] = &ptr2;
+  if (&ptr3  == &no_arg) goto done; args[n++] = &ptr3;
+  if (&ptr4  == &no_arg) goto done; args[n++] = &ptr4;
+  if (&ptr5  == &no_arg) goto done; args[n++] = &ptr5;
+  if (&ptr6  == &no_arg) goto done; args[n++] = &ptr6;
+  if (&ptr7  == &no_arg) goto done; args[n++] = &ptr7;
+  if (&ptr8  == &no_arg) goto done; args[n++] = &ptr8;
+  if (&ptr9  == &no_arg) goto done; args[n++] = &ptr9;
+  if (&ptr10 == &no_arg) goto done; args[n++] = &ptr10;
+  if (&ptr11 == &no_arg) goto done; args[n++] = &ptr11;
+  if (&ptr12 == &no_arg) goto done; args[n++] = &ptr12;
+  if (&ptr13 == &no_arg) goto done; args[n++] = &ptr13;
+  if (&ptr14 == &no_arg) goto done; args[n++] = &ptr14;
+  if (&ptr15 == &no_arg) goto done; args[n++] = &ptr15;
+  if (&ptr16 == &no_arg) goto done; args[n++] = &ptr16;
+ done:
+
+  int consumed;
+  int vec[kVecSize];
+  return DoMatchImpl(text, ANCHOR_BOTH, &consumed, args, n, vec, kVecSize);
+}
+
+bool RE::PartialMatch(const StringPiece& text,
+                      const Arg& ptr1,
+                      const Arg& ptr2,
+                      const Arg& ptr3,
+                      const Arg& ptr4,
+                      const Arg& ptr5,
+                      const Arg& ptr6,
+                      const Arg& ptr7,
+                      const Arg& ptr8,
+                      const Arg& ptr9,
+                      const Arg& ptr10,
+                      const Arg& ptr11,
+                      const Arg& ptr12,
+                      const Arg& ptr13,
+                      const Arg& ptr14,
+                      const Arg& ptr15,
+                      const Arg& ptr16) const {
+  const Arg* args[kMaxArgs];
+  int n = 0;
+  if (&ptr1  == &no_arg) goto done; args[n++] = &ptr1;
+  if (&ptr2  == &no_arg) goto done; args[n++] = &ptr2;
+  if (&ptr3  == &no_arg) goto done; args[n++] = &ptr3;
+  if (&ptr4  == &no_arg) goto done; args[n++] = &ptr4;
+  if (&ptr5  == &no_arg) goto done; args[n++] = &ptr5;
+  if (&ptr6  == &no_arg) goto done; args[n++] = &ptr6;
+  if (&ptr7  == &no_arg) goto done; args[n++] = &ptr7;
+  if (&ptr8  == &no_arg) goto done; args[n++] = &ptr8;
+  if (&ptr9  == &no_arg) goto done; args[n++] = &ptr9;
+  if (&ptr10 == &no_arg) goto done; args[n++] = &ptr10;
+  if (&ptr11 == &no_arg) goto done; args[n++] = &ptr11;
+  if (&ptr12 == &no_arg) goto done; args[n++] = &ptr12;
+  if (&ptr13 == &no_arg) goto done; args[n++] = &ptr13;
+  if (&ptr14 == &no_arg) goto done; args[n++] = &ptr14;
+  if (&ptr15 == &no_arg) goto done; args[n++] = &ptr15;
+  if (&ptr16 == &no_arg) goto done; args[n++] = &ptr16;
+ done:
+
+  int consumed;
+  int vec[kVecSize];
+  return DoMatchImpl(text, UNANCHORED, &consumed, args, n, vec, kVecSize);
+}
+
+bool RE::Consume(StringPiece* input,
+                 const Arg& ptr1,
+                 const Arg& ptr2,
+                 const Arg& ptr3,
+                 const Arg& ptr4,
+                 const Arg& ptr5,
+                 const Arg& ptr6,
+                 const Arg& ptr7,
+                 const Arg& ptr8,
+                 const Arg& ptr9,
+                 const Arg& ptr10,
+                 const Arg& ptr11,
+                 const Arg& ptr12,
+                 const Arg& ptr13,
+                 const Arg& ptr14,
+                 const Arg& ptr15,
+                 const Arg& ptr16) const {
+  const Arg* args[kMaxArgs];
+  int n = 0;
+  if (&ptr1  == &no_arg) goto done; args[n++] = &ptr1;
+  if (&ptr2  == &no_arg) goto done; args[n++] = &ptr2;
+  if (&ptr3  == &no_arg) goto done; args[n++] = &ptr3;
+  if (&ptr4  == &no_arg) goto done; args[n++] = &ptr4;
+  if (&ptr5  == &no_arg) goto done; args[n++] = &ptr5;
+  if (&ptr6  == &no_arg) goto done; args[n++] = &ptr6;
+  if (&ptr7  == &no_arg) goto done; args[n++] = &ptr7;
+  if (&ptr8  == &no_arg) goto done; args[n++] = &ptr8;
+  if (&ptr9  == &no_arg) goto done; args[n++] = &ptr9;
+  if (&ptr10 == &no_arg) goto done; args[n++] = &ptr10;
+  if (&ptr11 == &no_arg) goto done; args[n++] = &ptr11;
+  if (&ptr12 == &no_arg) goto done; args[n++] = &ptr12;
+  if (&ptr13 == &no_arg) goto done; args[n++] = &ptr13;
+  if (&ptr14 == &no_arg) goto done; args[n++] = &ptr14;
+  if (&ptr15 == &no_arg) goto done; args[n++] = &ptr15;
+  if (&ptr16 == &no_arg) goto done; args[n++] = &ptr16;
+ done:
+
+  int consumed;
+  int vec[kVecSize];
+  if (DoMatchImpl(*input, ANCHOR_START, &consumed,
+                  args, n, vec, kVecSize)) {
+    input->remove_prefix(consumed);
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool RE::FindAndConsume(StringPiece* input,
+                        const Arg& ptr1,
+                        const Arg& ptr2,
+                        const Arg& ptr3,
+                        const Arg& ptr4,
+                        const Arg& ptr5,
+                        const Arg& ptr6,
+                        const Arg& ptr7,
+                        const Arg& ptr8,
+                        const Arg& ptr9,
+                        const Arg& ptr10,
+                        const Arg& ptr11,
+                        const Arg& ptr12,
+                        const Arg& ptr13,
+                        const Arg& ptr14,
+                        const Arg& ptr15,
+                        const Arg& ptr16) const {
+  const Arg* args[kMaxArgs];
+  int n = 0;
+  if (&ptr1  == &no_arg) goto done; args[n++] = &ptr1;
+  if (&ptr2  == &no_arg) goto done; args[n++] = &ptr2;
+  if (&ptr3  == &no_arg) goto done; args[n++] = &ptr3;
+  if (&ptr4  == &no_arg) goto done; args[n++] = &ptr4;
+  if (&ptr5  == &no_arg) goto done; args[n++] = &ptr5;
+  if (&ptr6  == &no_arg) goto done; args[n++] = &ptr6;
+  if (&ptr7  == &no_arg) goto done; args[n++] = &ptr7;
+  if (&ptr8  == &no_arg) goto done; args[n++] = &ptr8;
+  if (&ptr9  == &no_arg) goto done; args[n++] = &ptr9;
+  if (&ptr10 == &no_arg) goto done; args[n++] = &ptr10;
+  if (&ptr11 == &no_arg) goto done; args[n++] = &ptr11;
+  if (&ptr12 == &no_arg) goto done; args[n++] = &ptr12;
+  if (&ptr13 == &no_arg) goto done; args[n++] = &ptr13;
+  if (&ptr14 == &no_arg) goto done; args[n++] = &ptr14;
+  if (&ptr15 == &no_arg) goto done; args[n++] = &ptr15;
+  if (&ptr16 == &no_arg) goto done; args[n++] = &ptr16;
+ done:
+
+  int consumed;
+  int vec[kVecSize];
+  if (DoMatchImpl(*input, UNANCHORED, &consumed,
+                  args, n, vec, kVecSize)) {
+    input->remove_prefix(consumed);
+    return true;
+  } else {
+    return false;
+  }
+}
+
+bool RE::Replace(const StringPiece& rewrite,
+                 string *str) const {
+  int vec[kVecSize];
+  int matches = TryMatch(*str, 0, UNANCHORED, vec, kVecSize);
+  if (matches == 0)
+    return false;
+
+  string s;
+  if (!Rewrite(&s, rewrite, *str, vec, matches))
+    return false;
+
+  assert(vec[0] >= 0);
+  assert(vec[1] >= 0);
+  str->replace(vec[0], vec[1] - vec[0], s);
+  return true;
+}
+
+int RE::GlobalReplace(const StringPiece& rewrite,
+                      string *str) const {
+  int count = 0;
+  int vec[kVecSize];
+  string out;
+  int start = 0;
+  int lastend = -1;
+
+  for (; start <= static_cast<int>(str->length()); count++) {
+    int matches = TryMatch(*str, start, UNANCHORED, vec, kVecSize);
+    if (matches <= 0)
+      break;
+    int matchstart = vec[0], matchend = vec[1];
+    assert(matchstart >= start);
+    assert(matchend >= matchstart);
+    if (matchstart == matchend && matchstart == lastend) {
+      // advance one character if we matched an empty string at the same
+      // place as the last match occurred
+      if (start < static_cast<int>(str->length()))
+        out.push_back((*str)[start]);
+      start++;
+    } else {
+      out.append(*str, start, matchstart - start);
+      Rewrite(&out, rewrite, *str, vec, matches);
+      start = matchend;
+      lastend = matchend;
+      count++;
+    }
+  }
+
+  if (count == 0)
+    return 0;
+
+  if (start < static_cast<int>(str->length()))
+    out.append(*str, start, str->length() - start);
+  swap(out, *str);
+  return count;
+}
+
+bool RE::Extract(const StringPiece& rewrite,
+                 const StringPiece& text,
+                 string *out) const {
+  int vec[kVecSize];
+  int matches = TryMatch(text, 0, UNANCHORED, vec, kVecSize);
+  if (matches == 0)
+    return false;
+  out->clear();
+  return Rewrite(out, rewrite, text, vec, matches);
+}
+
+/***** Actual matching and rewriting code *****/
+
+int RE::TryMatch(const StringPiece& text,
+                 int startpos,
+                 Anchor anchor,
+                 int *vec,
+                 int vecsize) const {
+  pcre* re = (anchor == ANCHOR_BOTH) ? re_full_ : re_partial_;
+  if (re == NULL) {
+    //fprintf(stderr, "Matching against invalid re: %s\n", error_->c_str());
+    return 0;
+  }
+
+  pcre_extra extra = { 0 };
+  if (options_.match_limit() > 0) {
+    extra.flags = PCRE_EXTRA_MATCH_LIMIT;
+    extra.match_limit = options_.match_limit();
+  }
+  int rc = pcre_exec(re,              // The regular expression object
+                     &extra,
+                     text.data(),
+                     text.size(),
+                     startpos,
+                     (anchor == UNANCHORED) ? 0 : PCRE_ANCHORED,
+                     vec,
+                     vecsize);
+
+  // Handle errors
+  if (rc == PCRE_ERROR_NOMATCH) {
+    return 0;
+  } else if (rc < 0) {
+    //fprintf(stderr, "Unexpected return code: %d when matching '%s'\n",
+    //        re, pattern_.c_str());
+    return 0;
+  } else if (rc == 0) {
+    // pcre_exec() returns 0 as a special case when the number of
+    // capturing subpatterns exceeds the size of the vector.
+    // When this happens, there is a match and the output vector
+    // is filled, but we miss out on the positions of the extra subpatterns.
+    rc = vecsize / 2;
+  }
+
+  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
+  }
+
+  return rc;
+}
+
+bool RE::DoMatchImpl(const StringPiece& text,
+                     Anchor anchor,
+                     int* consumed,
+                     const Arg* const* args,
+                     int n,
+                     int* vec,
+                     int vecsize) const {
+  assert((1 + n) * 3 <= vecsize);  // results + PCRE workspace
+  int matches = TryMatch(text, 0, anchor, vec, vecsize);
+  assert(matches >= 0);  // TryMatch never returns negatives
+  if (matches == 0)
+    return false;
+
+  *consumed = vec[1];
+
+  if (args == NULL) {
+    // We are not interested in results
+    return true;
+  }
+
+  // If we got here, we must have matched the whole pattern.
+  // We do not need (can not do) any more checks on the value of 'matches' here
+  // -- see the comment for TryMatch.
+  for (int i = 0; i < n; i++) {
+    const int start = vec[2*(i+1)];
+    const int limit = vec[2*(i+1)+1];
+    if (!args[i]->Parse(text.data() + start, limit-start)) {
+      // TODO: Should we indicate what the error was?
+      return false;
+    }
+  }
+
+  return true;
+}
+
+bool RE::DoMatch(const StringPiece& text,
+                 Anchor anchor,
+                 int* consumed,
+                 const Arg* const args[],
+                 int n) const {
+  assert(n >= 0);
+  size_t const vecsize = (1 + n) * 3;  // results + PCRE workspace
+                                       // (as for kVecSize)
+  int space[21];   // use stack allocation for small vecsize (common case)
+  int* vec = vecsize <= 21 ? space : new int[vecsize];
+  bool retval = DoMatchImpl(text, anchor, consumed, args, n, vec, vecsize);
+  if (vec != space) delete [] vec;
+  return retval;
+}
+
+bool RE::Rewrite(string *out, const StringPiece &rewrite,
+                 const StringPiece &text, int *vec, int veclen) const {
+  for (const char *s = rewrite.data(), *end = s + rewrite.size();
+       s < end; s++) {
+    int c = *s;
+    if (c == '\\') {
+      c = *++s;
+      if (isdigit(c)) {
+        int n = (c - '0');
+        if (n >= veclen) {
+          //fprintf(stderr, requested group %d in regexp %.*s\n",
+          //        n, rewrite.size(), rewrite.data());
+          return false;
+        }
+        int start = vec[2 * n];
+        if (start >= 0)
+          out->append(text.data() + start, vec[2 * n + 1] - start);
+      } else if (c == '\\') {
+        out->push_back('\\');
+      } else {
+        //fprintf(stderr, "invalid rewrite pattern: %.*s\n",
+        //        rewrite.size(), rewrite.data());
+        return false;
+      }
+    } else {
+      out->push_back(c);
+    }
+  }
+  return true;
+}
+
+// Return the number of capturing subpatterns, or -1 if the
+// regexp wasn't valid on construction.
+int RE::NumberOfCapturingGroups() {
+  if (re_partial_ == NULL) return -1;
+
+  int result;
+  int pcre_retval = pcre_fullinfo(re_partial_,  // The regular expression object
+                                  NULL,         // We did not study the pattern
+                                  PCRE_INFO_CAPTURECOUNT,
+                                  &result);
+  assert(pcre_retval == 0);
+  return result;
+}
+
+/***** Parsers for various types *****/
+
+bool Arg::parse_null(const char* str, int n, void* dest) {
+  // We fail if somebody asked us to store into a non-NULL void* pointer
+  return (dest == NULL);
+}
+
+bool Arg::parse_string(const char* str, int n, void* dest) {
+  reinterpret_cast<string*>(dest)->assign(str, n);
+  return true;
+}
+
+bool Arg::parse_stringpiece(const char* str, int n, void* dest) {
+  reinterpret_cast<StringPiece*>(dest)->set(str, n);
+  return true;
+}
+
+bool Arg::parse_char(const char* str, int n, void* dest) {
+  if (n != 1) return false;
+  *(reinterpret_cast<char*>(dest)) = str[0];
+  return true;
+}
+
+bool Arg::parse_uchar(const char* str, int n, void* dest) {
+  if (n != 1) return false;
+  *(reinterpret_cast<unsigned char*>(dest)) = str[0];
+  return true;
+}
+
+// Largest number spec that we are willing to parse
+static const int kMaxNumberLength = 32;
+
+// REQUIRES "buf" must have length at least kMaxNumberLength+1
+// REQUIRES "n > 0"
+// Copies "str" into "buf" and null-terminates if necessary.
+// Returns one of:
+//      a. "str" if no termination is needed
+//      b. "buf" if the string was copied and null-terminated
+//      c. "" if the input was invalid and has no hope of being parsed
+static const char* TerminateNumber(char* buf, const char* str, int n) {
+  if ((n > 0) && isspace(*str)) {
+    // We are less forgiving than the strtoxxx() routines and do not
+    // allow leading spaces.
+    return "";
+  }
+
+  // See if the character right after the input text may potentially
+  // look like a digit.
+  if (isdigit(str[n]) ||
+      ((str[n] >= 'a') && (str[n] <= 'f')) ||
+      ((str[n] >= 'A') && (str[n] <= 'F'))) {
+    if (n > kMaxNumberLength) return ""; // Input too big to be a valid number
+    memcpy(buf, str, n);
+    buf[n] = '\0';
+    return buf;
+  } else {
+    // We can parse right out of the supplied string, so return it.
+    return str;
+  }
+}
+
+bool Arg::parse_long_radix(const char* str,
+                           int n,
+                           void* dest,
+                           int radix) {
+  if (n == 0) return false;
+  char buf[kMaxNumberLength+1];
+  str = TerminateNumber(buf, str, n);
+  char* end;
+  errno = 0;
+  long r = strtol(str, &end, radix);
+  if (end != str + n) return false;   // Leftover junk
+  if (errno) return false;
+  *(reinterpret_cast<long*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_ulong_radix(const char* str,
+                            int n,
+                            void* dest,
+                            int radix) {
+  if (n == 0) return false;
+  char buf[kMaxNumberLength+1];
+  str = TerminateNumber(buf, str, n);
+  char* end;
+  errno = 0;
+  unsigned long r = strtoul(str, &end, radix);
+  if (end != str + n) return false;   // Leftover junk
+  if (errno) return false;
+  *(reinterpret_cast<unsigned long*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_short_radix(const char* str,
+                            int n,
+                            void* dest,
+                            int radix) {
+  long r;
+  if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse
+  if (r < SHRT_MIN || r > SHRT_MAX) return false;       // Out of range
+  *(reinterpret_cast<short*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_ushort_radix(const char* str,
+                             int n,
+                             void* dest,
+                             int radix) {
+  unsigned long r;
+  if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse
+  if (r > USHRT_MAX) return false;                      // Out of range
+  *(reinterpret_cast<unsigned short*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_int_radix(const char* str,
+                          int n,
+                          void* dest,
+                          int radix) {
+  long r;
+  if (!parse_long_radix(str, n, &r, radix)) return false; // Could not parse
+  if (r < INT_MIN || r > INT_MAX) return false;         // Out of range
+  *(reinterpret_cast<int*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_uint_radix(const char* str,
+                           int n,
+                           void* dest,
+                           int radix) {
+  unsigned long r;
+  if (!parse_ulong_radix(str, n, &r, radix)) return false; // Could not parse
+  if (r > UINT_MAX) return false;                       // Out of range
+  *(reinterpret_cast<unsigned int*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_longlong_radix(const char* str,
+                               int n,
+                               void* dest,
+                               int radix) {
+#ifndef HAVE_LONG_LONG
+  return false;
+#else
+  if (n == 0) return false;
+  char buf[kMaxNumberLength+1];
+  str = TerminateNumber(buf, str, n);
+  char* end;
+  errno = 0;
+#if defined HAVE_STRTOQ
+  long long r = strtoq(str, &end, radix);
+#elif defined HAVE_STRTOLL
+  long long r = strtoll(str, &end, radix);
+#else
+#error parse_longlong_radix: cannot convert input to a long-long
+#endif
+  if (end != str + n) return false;   // Leftover junk
+  if (errno) return false;
+  *(reinterpret_cast<long long*>(dest)) = r;
+  return true;
+#endif   /* HAVE_LONG_LONG */
+}
+
+bool Arg::parse_ulonglong_radix(const char* str,
+                                int n,
+                                void* dest,
+                                int radix) {
+#ifndef HAVE_UNSIGNED_LONG_LONG
+  return false;
+#else
+  if (n == 0) return false;
+  char buf[kMaxNumberLength+1];
+  str = TerminateNumber(buf, str, n);
+  char* end;
+  errno = 0;
+#if defined HAVE_STRTOQ
+  unsigned long long r = strtouq(str, &end, radix);
+#elif defined HAVE_STRTOLL
+  unsigned long long r = strtoull(str, &end, radix);
+#else
+#error parse_ulonglong_radix: cannot convert input to a long-long
+#endif
+  if (end != str + n) return false;   // Leftover junk
+  if (errno) return false;
+  *(reinterpret_cast<unsigned long long*>(dest)) = r;
+  return true;
+#endif   /* HAVE_UNSIGNED_LONG_LONG */
+}
+
+bool Arg::parse_double(const char* str, int n, void* dest) {
+  if (n == 0) return false;
+  static const int kMaxLength = 200;
+  char buf[kMaxLength];
+  if (n >= kMaxLength) return false;
+  memcpy(buf, str, n);
+  buf[n] = '\0';
+  errno = 0;
+  char* end;
+  double r = strtod(buf, &end);
+  if (end != buf + n) return false;   // Leftover junk
+  if (errno) return false;
+  *(reinterpret_cast<double*>(dest)) = r;
+  return true;
+}
+
+bool Arg::parse_float(const char* str, int n, void* dest) {
+  double r;
+  if (!parse_double(str, n, &r)) return false;
+  *(reinterpret_cast<float*>(dest)) = static_cast<float>(r);
+  return true;
+}
+
+
+#define DEFINE_INTEGER_PARSERS(name)                                    \
+  bool Arg::parse_##name(const char* str, int n, void* dest) {          \
+    return parse_##name##_radix(str, n, dest, 10);                      \
+  }                                                                     \
+  bool Arg::parse_##name##_hex(const char* str, int n, void* dest) {    \
+    return parse_##name##_radix(str, n, dest, 16);                      \
+  }                                                                     \
+  bool Arg::parse_##name##_octal(const char* str, int n, void* dest) {  \
+    return parse_##name##_radix(str, n, dest, 8);                       \
+  }                                                                     \
+  bool Arg::parse_##name##_cradix(const char* str, int n, void* dest) { \
+    return parse_##name##_radix(str, n, dest, 0);                       \
+  }
+
+DEFINE_INTEGER_PARSERS(short);
+DEFINE_INTEGER_PARSERS(ushort);
+DEFINE_INTEGER_PARSERS(int);
+DEFINE_INTEGER_PARSERS(uint);
+DEFINE_INTEGER_PARSERS(long);
+DEFINE_INTEGER_PARSERS(ulong);
+DEFINE_INTEGER_PARSERS(longlong);
+DEFINE_INTEGER_PARSERS(ulonglong);
+
+#undef DEFINE_INTEGER_PARSERS
+
+}   // namespace pcrecpp