175 lines
6.7 KiB
C
175 lines
6.7 KiB
C
// Copyright (c) 2005, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: Sanjay Ghemawat
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#ifndef _PCRECPPARG_H
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#define _PCRECPPARG_H
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#include <stdlib.h> // for NULL
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#include <string>
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#include <pcre.h>
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namespace pcrecpp {
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class StringPiece;
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// Hex/Octal/Binary?
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// Special class for parsing into objects that define a ParseFrom() method
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template <class T>
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class _RE_MatchObject {
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public:
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static inline bool Parse(const char* str, int n, void* dest) {
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if (dest == NULL) return true;
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T* object = reinterpret_cast<T*>(dest);
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return object->ParseFrom(str, n);
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}
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};
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class PCRECPP_EXP_DEFN Arg {
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public:
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// Empty constructor so we can declare arrays of Arg
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Arg();
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// Constructor specially designed for NULL arguments
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Arg(void*);
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typedef bool (*Parser)(const char* str, int n, void* dest);
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// Type-specific parsers
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#define PCRE_MAKE_PARSER(type,name) \
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Arg(type* p) : arg_(p), parser_(name) { } \
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Arg(type* p, Parser parser) : arg_(p), parser_(parser) { }
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PCRE_MAKE_PARSER(char, parse_char);
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PCRE_MAKE_PARSER(unsigned char, parse_uchar);
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PCRE_MAKE_PARSER(short, parse_short);
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PCRE_MAKE_PARSER(unsigned short, parse_ushort);
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PCRE_MAKE_PARSER(int, parse_int);
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PCRE_MAKE_PARSER(unsigned int, parse_uint);
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PCRE_MAKE_PARSER(long, parse_long);
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PCRE_MAKE_PARSER(unsigned long, parse_ulong);
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#if @pcre_have_long_long@
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PCRE_MAKE_PARSER(long long, parse_longlong);
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#endif
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#if @pcre_have_ulong_long@
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PCRE_MAKE_PARSER(unsigned long long, parse_ulonglong);
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#endif
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PCRE_MAKE_PARSER(float, parse_float);
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PCRE_MAKE_PARSER(double, parse_double);
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PCRE_MAKE_PARSER(std::string, parse_string);
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PCRE_MAKE_PARSER(StringPiece, parse_stringpiece);
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#undef PCRE_MAKE_PARSER
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// Generic constructor
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template <class T> Arg(T*, Parser parser);
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// Generic constructor template
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template <class T> Arg(T* p)
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: arg_(p), parser_(_RE_MatchObject<T>::Parse) {
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}
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// Parse the data
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bool Parse(const char* str, int n) const;
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private:
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void* arg_;
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Parser parser_;
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static bool parse_null (const char* str, int n, void* dest);
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static bool parse_char (const char* str, int n, void* dest);
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static bool parse_uchar (const char* str, int n, void* dest);
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static bool parse_float (const char* str, int n, void* dest);
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static bool parse_double (const char* str, int n, void* dest);
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static bool parse_string (const char* str, int n, void* dest);
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static bool parse_stringpiece (const char* str, int n, void* dest);
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#define PCRE_DECLARE_INTEGER_PARSER(name) \
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private: \
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static bool parse_ ## name(const char* str, int n, void* dest); \
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static bool parse_ ## name ## _radix( \
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const char* str, int n, void* dest, int radix); \
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public: \
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static bool parse_ ## name ## _hex(const char* str, int n, void* dest); \
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static bool parse_ ## name ## _octal(const char* str, int n, void* dest); \
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static bool parse_ ## name ## _cradix(const char* str, int n, void* dest)
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PCRE_DECLARE_INTEGER_PARSER(short);
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PCRE_DECLARE_INTEGER_PARSER(ushort);
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PCRE_DECLARE_INTEGER_PARSER(int);
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PCRE_DECLARE_INTEGER_PARSER(uint);
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PCRE_DECLARE_INTEGER_PARSER(long);
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PCRE_DECLARE_INTEGER_PARSER(ulong);
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PCRE_DECLARE_INTEGER_PARSER(longlong);
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PCRE_DECLARE_INTEGER_PARSER(ulonglong);
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#undef PCRE_DECLARE_INTEGER_PARSER
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};
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inline Arg::Arg() : arg_(NULL), parser_(parse_null) { }
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inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { }
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inline bool Arg::Parse(const char* str, int n) const {
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return (*parser_)(str, n, arg_);
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}
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// This part of the parser, appropriate only for ints, deals with bases
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#define MAKE_INTEGER_PARSER(type, name) \
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inline Arg Hex(type* ptr) { \
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return Arg(ptr, Arg::parse_ ## name ## _hex); } \
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inline Arg Octal(type* ptr) { \
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return Arg(ptr, Arg::parse_ ## name ## _octal); } \
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inline Arg CRadix(type* ptr) { \
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return Arg(ptr, Arg::parse_ ## name ## _cradix); }
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MAKE_INTEGER_PARSER(short, short) /* */
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MAKE_INTEGER_PARSER(unsigned short, ushort) /* */
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MAKE_INTEGER_PARSER(int, int) /* Don't use semicolons */
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MAKE_INTEGER_PARSER(unsigned int, uint) /* after these statement */
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MAKE_INTEGER_PARSER(long, long) /* because they can cause */
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MAKE_INTEGER_PARSER(unsigned long, ulong) /* compiler warnings if */
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#if @pcre_have_long_long@ /* the checking level is */
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MAKE_INTEGER_PARSER(long long, longlong) /* turned up high enough. */
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#endif /* */
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#if @pcre_have_ulong_long@ /* */
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MAKE_INTEGER_PARSER(unsigned long long, ulonglong) /* */
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#endif
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#undef PCRE_IS_SET
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#undef PCRE_SET_OR_CLEAR
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#undef MAKE_INTEGER_PARSER
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} // namespace pcrecpp
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#endif /* _PCRECPPARG_H */
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