// Copyright (c) 2005, Google Inc.

// All rights reserved.

//

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// 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.

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// 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

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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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// 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 @pcre_have_long_long@

  PCRE_MAKE_PARSER(long long,          parse_longlong);

#endif

#if @pcre_have_ulong_long@

  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 @pcre_have_long_long@                          /* the checking level is  */

MAKE_INTEGER_PARSER(long long,          longlong)  /* turned up high enough. */

#endif                                             /*                        */

#if @pcre_have_ulong_long@                         /*                        */

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 */