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 // 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
 
 #ifndef _PCRECPPARG_H
 #define _PCRECPPARG_H
 
 #include <stdlib.h>    // for NULL
 #include <string>
 
 #include <pcre.h>
 
 namespace pcrecpp {
 
 class StringPiece;
 
 // Hex/Octal/Binary?
 
 // Special class for parsing into objects that define a ParseFrom() method
 template <class T>
 class _RE_MatchObject {
  public:
   static inline bool Parse(const char* str, int n, void* dest) {
     if (dest == NULL) return true;
     T* object = reinterpret_cast<T*>(dest);
     return object->ParseFrom(str, n);
   }
 };
 
 class PCRECPP_EXP_DEFN Arg {
  public:
   // Empty constructor so we can declare arrays of Arg
   Arg();
 
   // Constructor specially designed for NULL arguments
   Arg(void*);
 
   typedef bool (*Parser)(const char* str, int n, void* dest);
 
 // Type-specific parsers
 #define PCRE_MAKE_PARSER(type,name)                             \
   Arg(type* p) : arg_(p), parser_(name) { }                     \
   Arg(type* p, Parser parser) : arg_(p), parser_(parser) { }
 
 
   PCRE_MAKE_PARSER(char,               parse_char);
   PCRE_MAKE_PARSER(unsigned char,      parse_uchar);
   PCRE_MAKE_PARSER(short,              parse_short);
   PCRE_MAKE_PARSER(unsigned short,     parse_ushort);
   PCRE_MAKE_PARSER(int,                parse_int);
   PCRE_MAKE_PARSER(unsigned int,       parse_uint);
   PCRE_MAKE_PARSER(long,               parse_long);
   PCRE_MAKE_PARSER(unsigned long,      parse_ulong);
 #if 1
   PCRE_MAKE_PARSER(long long,          parse_longlong);
 #endif
 #if 1
   PCRE_MAKE_PARSER(unsigned long long, parse_ulonglong);
 #endif
   PCRE_MAKE_PARSER(float,              parse_float);
   PCRE_MAKE_PARSER(double,             parse_double);
   PCRE_MAKE_PARSER(std::string,        parse_string);
   PCRE_MAKE_PARSER(StringPiece,        parse_stringpiece);
 
 #undef PCRE_MAKE_PARSER
 
   // Generic constructor
   template <class T> Arg(T*, Parser parser);
   // Generic constructor template
   template <class T> Arg(T* p)
     : arg_(p), parser_(_RE_MatchObject<T>::Parse) {
   }
 
   // Parse the data
   bool Parse(const char* str, int n) const;
 
  private:
   void*         arg_;
   Parser        parser_;
 
   static bool parse_null          (const char* str, int n, void* dest);
   static bool parse_char          (const char* str, int n, void* dest);
   static bool parse_uchar         (const char* str, int n, void* dest);
   static bool parse_float         (const char* str, int n, void* dest);
   static bool parse_double        (const char* str, int n, void* dest);
   static bool parse_string        (const char* str, int n, void* dest);
   static bool parse_stringpiece   (const char* str, int n, void* dest);
 
 #define PCRE_DECLARE_INTEGER_PARSER(name)                                   \
  private:                                                                   \
   static bool parse_ ## name(const char* str, int n, void* dest);           \
   static bool parse_ ## name ## _radix(                                     \
     const char* str, int n, void* dest, int radix);                         \
  public:                                                                    \
   static bool parse_ ## name ## _hex(const char* str, int n, void* dest);   \
   static bool parse_ ## name ## _octal(const char* str, int n, void* dest); \
   static bool parse_ ## name ## _cradix(const char* str, int n, void* dest)
 
   PCRE_DECLARE_INTEGER_PARSER(short);
   PCRE_DECLARE_INTEGER_PARSER(ushort);
   PCRE_DECLARE_INTEGER_PARSER(int);
   PCRE_DECLARE_INTEGER_PARSER(uint);
   PCRE_DECLARE_INTEGER_PARSER(long);
   PCRE_DECLARE_INTEGER_PARSER(ulong);
   PCRE_DECLARE_INTEGER_PARSER(longlong);
   PCRE_DECLARE_INTEGER_PARSER(ulonglong);
 
 #undef PCRE_DECLARE_INTEGER_PARSER
 };
 
 inline Arg::Arg() : arg_(NULL), parser_(parse_null) { }
 inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { }
 
 inline bool Arg::Parse(const char* str, int n) const {
   return (*parser_)(str, n, arg_);
 }
 
 // This part of the parser, appropriate only for ints, deals with bases
 #define MAKE_INTEGER_PARSER(type, name) \
   inline Arg Hex(type* ptr) { \
     return Arg(ptr, Arg::parse_ ## name ## _hex); } \
   inline Arg Octal(type* ptr) { \
     return Arg(ptr, Arg::parse_ ## name ## _octal); } \
   inline Arg CRadix(type* ptr) { \
     return Arg(ptr, Arg::parse_ ## name ## _cradix); }
 
 MAKE_INTEGER_PARSER(short,              short)     /*                        */
 MAKE_INTEGER_PARSER(unsigned short,     ushort)    /*                        */
 MAKE_INTEGER_PARSER(int,                int)       /* Don't use semicolons   */
 MAKE_INTEGER_PARSER(unsigned int,       uint)      /* after these statement  */
 MAKE_INTEGER_PARSER(long,               long)      /* because they can cause */
 MAKE_INTEGER_PARSER(unsigned long,      ulong)     /* compiler warnings if   */
 #if 1                          /* the checking level is  */
 MAKE_INTEGER_PARSER(long long,          longlong)  /* turned up high enough. */
 #endif                                             /*                        */
 #if 1                         /*                        */
 MAKE_INTEGER_PARSER(unsigned long long, ulonglong) /*                        */
 #endif
 
 #undef PCRE_IS_SET
 #undef PCRE_SET_OR_CLEAR
 #undef MAKE_INTEGER_PARSER
 
 }   // namespace pcrecpp
 
 
 #endif /* _PCRECPPARG_H */

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