1: // Copyright (c) 2005, Google Inc.
2: // All rights reserved.
3: //
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5: // modification, are permitted provided that the following conditions are
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9: // notice, this list of conditions and the following disclaimer.
10: // * Redistributions in binary form must reproduce the above
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12: // in the documentation and/or other materials provided with the
13: // distribution.
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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
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21: // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22: // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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24: // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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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