Tristan Matthews | 0461646 | 2013-11-14 16:09:34 -0500 | [diff] [blame] | 1 | // Copyright (c) 2005, Google Inc. |
| 2 | // All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions are |
| 6 | // met: |
| 7 | // |
| 8 | // * Redistributions of source code must retain the above copyright |
| 9 | // notice, this list of conditions and the following disclaimer. |
| 10 | // * Redistributions in binary form must reproduce the above |
| 11 | // copyright notice, this list of conditions and the following disclaimer |
| 12 | // in the documentation and/or other materials provided with the |
| 13 | // distribution. |
| 14 | // * Neither the name of Google Inc. nor the names of its |
| 15 | // contributors may be used to endorse or promote products derived from |
| 16 | // this software without specific prior written permission. |
| 17 | // |
| 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | // |
| 30 | // Author: Sanjay Ghemawat |
| 31 | |
| 32 | #ifndef _PCRECPPARG_H |
| 33 | #define _PCRECPPARG_H |
| 34 | |
| 35 | #include <stdlib.h> // for NULL |
| 36 | #include <string> |
| 37 | |
| 38 | #include <pcre.h> |
| 39 | |
| 40 | namespace pcrecpp { |
| 41 | |
| 42 | class StringPiece; |
| 43 | |
| 44 | // Hex/Octal/Binary? |
| 45 | |
| 46 | // Special class for parsing into objects that define a ParseFrom() method |
| 47 | template <class T> |
| 48 | class _RE_MatchObject { |
| 49 | public: |
| 50 | static inline bool Parse(const char* str, int n, void* dest) { |
| 51 | if (dest == NULL) return true; |
| 52 | T* object = reinterpret_cast<T*>(dest); |
| 53 | return object->ParseFrom(str, n); |
| 54 | } |
| 55 | }; |
| 56 | |
| 57 | class PCRECPP_EXP_DEFN Arg { |
| 58 | public: |
| 59 | // Empty constructor so we can declare arrays of Arg |
| 60 | Arg(); |
| 61 | |
| 62 | // Constructor specially designed for NULL arguments |
| 63 | Arg(void*); |
| 64 | |
| 65 | typedef bool (*Parser)(const char* str, int n, void* dest); |
| 66 | |
| 67 | // Type-specific parsers |
| 68 | #define PCRE_MAKE_PARSER(type,name) \ |
| 69 | Arg(type* p) : arg_(p), parser_(name) { } \ |
| 70 | Arg(type* p, Parser parser) : arg_(p), parser_(parser) { } |
| 71 | |
| 72 | |
| 73 | PCRE_MAKE_PARSER(char, parse_char); |
| 74 | PCRE_MAKE_PARSER(unsigned char, parse_uchar); |
| 75 | PCRE_MAKE_PARSER(short, parse_short); |
| 76 | PCRE_MAKE_PARSER(unsigned short, parse_ushort); |
| 77 | PCRE_MAKE_PARSER(int, parse_int); |
| 78 | PCRE_MAKE_PARSER(unsigned int, parse_uint); |
| 79 | PCRE_MAKE_PARSER(long, parse_long); |
| 80 | PCRE_MAKE_PARSER(unsigned long, parse_ulong); |
| 81 | #if @pcre_have_long_long@ |
| 82 | PCRE_MAKE_PARSER(long long, parse_longlong); |
| 83 | #endif |
| 84 | #if @pcre_have_ulong_long@ |
| 85 | PCRE_MAKE_PARSER(unsigned long long, parse_ulonglong); |
| 86 | #endif |
| 87 | PCRE_MAKE_PARSER(float, parse_float); |
| 88 | PCRE_MAKE_PARSER(double, parse_double); |
| 89 | PCRE_MAKE_PARSER(std::string, parse_string); |
| 90 | PCRE_MAKE_PARSER(StringPiece, parse_stringpiece); |
| 91 | |
| 92 | #undef PCRE_MAKE_PARSER |
| 93 | |
| 94 | // Generic constructor |
| 95 | template <class T> Arg(T*, Parser parser); |
| 96 | // Generic constructor template |
| 97 | template <class T> Arg(T* p) |
| 98 | : arg_(p), parser_(_RE_MatchObject<T>::Parse) { |
| 99 | } |
| 100 | |
| 101 | // Parse the data |
| 102 | bool Parse(const char* str, int n) const; |
| 103 | |
| 104 | private: |
| 105 | void* arg_; |
| 106 | Parser parser_; |
| 107 | |
| 108 | static bool parse_null (const char* str, int n, void* dest); |
| 109 | static bool parse_char (const char* str, int n, void* dest); |
| 110 | static bool parse_uchar (const char* str, int n, void* dest); |
| 111 | static bool parse_float (const char* str, int n, void* dest); |
| 112 | static bool parse_double (const char* str, int n, void* dest); |
| 113 | static bool parse_string (const char* str, int n, void* dest); |
| 114 | static bool parse_stringpiece (const char* str, int n, void* dest); |
| 115 | |
| 116 | #define PCRE_DECLARE_INTEGER_PARSER(name) \ |
| 117 | private: \ |
| 118 | static bool parse_ ## name(const char* str, int n, void* dest); \ |
| 119 | static bool parse_ ## name ## _radix( \ |
| 120 | const char* str, int n, void* dest, int radix); \ |
| 121 | public: \ |
| 122 | static bool parse_ ## name ## _hex(const char* str, int n, void* dest); \ |
| 123 | static bool parse_ ## name ## _octal(const char* str, int n, void* dest); \ |
| 124 | static bool parse_ ## name ## _cradix(const char* str, int n, void* dest) |
| 125 | |
| 126 | PCRE_DECLARE_INTEGER_PARSER(short); |
| 127 | PCRE_DECLARE_INTEGER_PARSER(ushort); |
| 128 | PCRE_DECLARE_INTEGER_PARSER(int); |
| 129 | PCRE_DECLARE_INTEGER_PARSER(uint); |
| 130 | PCRE_DECLARE_INTEGER_PARSER(long); |
| 131 | PCRE_DECLARE_INTEGER_PARSER(ulong); |
| 132 | PCRE_DECLARE_INTEGER_PARSER(longlong); |
| 133 | PCRE_DECLARE_INTEGER_PARSER(ulonglong); |
| 134 | |
| 135 | #undef PCRE_DECLARE_INTEGER_PARSER |
| 136 | }; |
| 137 | |
| 138 | inline Arg::Arg() : arg_(NULL), parser_(parse_null) { } |
| 139 | inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { } |
| 140 | |
| 141 | inline bool Arg::Parse(const char* str, int n) const { |
| 142 | return (*parser_)(str, n, arg_); |
| 143 | } |
| 144 | |
| 145 | // This part of the parser, appropriate only for ints, deals with bases |
| 146 | #define MAKE_INTEGER_PARSER(type, name) \ |
| 147 | inline Arg Hex(type* ptr) { \ |
| 148 | return Arg(ptr, Arg::parse_ ## name ## _hex); } \ |
| 149 | inline Arg Octal(type* ptr) { \ |
| 150 | return Arg(ptr, Arg::parse_ ## name ## _octal); } \ |
| 151 | inline Arg CRadix(type* ptr) { \ |
| 152 | return Arg(ptr, Arg::parse_ ## name ## _cradix); } |
| 153 | |
| 154 | MAKE_INTEGER_PARSER(short, short) /* */ |
| 155 | MAKE_INTEGER_PARSER(unsigned short, ushort) /* */ |
| 156 | MAKE_INTEGER_PARSER(int, int) /* Don't use semicolons */ |
| 157 | MAKE_INTEGER_PARSER(unsigned int, uint) /* after these statement */ |
| 158 | MAKE_INTEGER_PARSER(long, long) /* because they can cause */ |
| 159 | MAKE_INTEGER_PARSER(unsigned long, ulong) /* compiler warnings if */ |
| 160 | #if @pcre_have_long_long@ /* the checking level is */ |
| 161 | MAKE_INTEGER_PARSER(long long, longlong) /* turned up high enough. */ |
| 162 | #endif /* */ |
| 163 | #if @pcre_have_ulong_long@ /* */ |
| 164 | MAKE_INTEGER_PARSER(unsigned long long, ulonglong) /* */ |
| 165 | #endif |
| 166 | |
| 167 | #undef PCRE_IS_SET |
| 168 | #undef PCRE_SET_OR_CLEAR |
| 169 | #undef MAKE_INTEGER_PARSER |
| 170 | |
| 171 | } // namespace pcrecpp |
| 172 | |
| 173 | |
| 174 | #endif /* _PCRECPPARG_H */ |