/[pcre]/code/branches/pcre16/pcrecpparg.h.in
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Contents of /code/branches/pcre16/pcrecpparg.h.in

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Revision 263 - (hide annotations) (download)
Mon Nov 12 16:53:25 2007 UTC (7 years, 1 month ago) by ph10
Original Path: code/trunk/pcrecpparg.h.in
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 nigel 87 // 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 ph10 199 #include <pcre.h>
39    
40 nigel 87 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 ph10 263 if (dest == NULL) return true;
52 nigel 87 T* object = reinterpret_cast<T*>(dest);
53     return object->ParseFrom(str, n);
54     }
55     };
56    
57 ph10 199 class PCRECPP_EXP_DEFN Arg {
58 nigel 87 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 nigel 93 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 nigel 87 #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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