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17//
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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
40namespace pcrecpp {
41
42class StringPiece;
43
44// Hex/Octal/Binary?
45
46// Special class for parsing into objects that define a ParseFrom() method
47template <class T>
48class _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
57class 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
138inline Arg::Arg() : arg_(NULL), parser_(parse_null) { }
139inline Arg::Arg(void* p) : arg_(p), parser_(parse_null) { }
140
141inline 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
154MAKE_INTEGER_PARSER(short,              short)     /*                        */
155MAKE_INTEGER_PARSER(unsigned short,     ushort)    /*                        */
156MAKE_INTEGER_PARSER(int,                int)       /* Don't use semicolons   */
157MAKE_INTEGER_PARSER(unsigned int,       uint)      /* after these statement  */
158MAKE_INTEGER_PARSER(long,               long)      /* because they can cause */
159MAKE_INTEGER_PARSER(unsigned long,      ulong)     /* compiler warnings if   */
160#if @pcre_have_long_long@                          /* the checking level is  */
161MAKE_INTEGER_PARSER(long long,          longlong)  /* turned up high enough. */
162#endif                                             /*                        */
163#if @pcre_have_ulong_long@                         /*                        */
164MAKE_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 */
175