release/src/router/pcre/pcrecpparg.h

   1 // Copyright (c) 2005, Google Inc.
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  10 //     * Redistributions in binary form must reproduce the above
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  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
  82   PCRE_MAKE_PARSER(long long,          parse_longlong);
  83 #endif
  84 #if
  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                           /* the checking level is  */
 161 MAKE_INTEGER_PARSER(long long,          longlong)  /* turned up high enough. */
 162 #endif                                             /*                        */
 163 #if                          /*                        */
 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 */