1 // Copyright (c) 2005, Google Inc.
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30 // Author: Sanjay Ghemawat
35 #include <stdlib.h> // for NULL
46 // Special class for parsing into objects that define a ParseFrom() method
48 class _RE_MatchObject {
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);
57 class PCRECPP_EXP_DEFN Arg {
59 // Empty constructor so we can declare arrays of Arg
62 // Constructor specially designed for NULL arguments
65 typedef bool (*Parser)(const char* str, int n, void* dest);
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) { }
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);
84 #if @pcre_have_ulong_long@
85 PCRE_MAKE_PARSER(unsigned long long, parse_ulonglong);
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);
92 #undef PCRE_MAKE_PARSER
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) {
102 bool Parse(const char* str, int n) const;
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);
116 #define PCRE_DECLARE_INTEGER_PARSER(name) \
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); \
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)
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);
135 #undef PCRE_DECLARE_INTEGER_PARSER
138 inline Arg::Arg() : arg_(NULL), parser_(parse_null) { }
139 inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { }
141 inline bool Arg::Parse(const char* str, int n) const {
142 return (*parser_)(str, n, arg_);
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); }
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. */
163 #if @pcre_have_ulong_long@ /* */
164 MAKE_INTEGER_PARSER(unsigned long long, ulonglong) /* */
168 #undef PCRE_SET_OR_CLEAR
169 #undef MAKE_INTEGER_PARSER
171 } // namespace pcrecpp
174 #endif /* _PCRECPPARG_H */
