/[pcre]/code/trunk/pcrecpparg.h.in
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Contents of /code/trunk/pcrecpparg.h.in

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Revision 263 - (show annotations) (download)
Mon Nov 12 16:53:25 2007 UTC (7 years ago) by ph10
File size: 6865 byte(s)
Apply Craig's patch, which makes it possible to "ignore" values in parens 
when parsing an RE using the c++ wrapper.

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 */

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