libzypp  17.28.4
Regex.h
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12 #ifndef ZYPP_BASE_REGEX_H
13 #define ZYPP_BASE_REGEX_H
14 
15 #include <iosfwd>
16 #include <string>
17 #include <regex.h>
18 
19 #include <zypp-core/base/Exception.h>
20 
22 namespace zypp
23 {
27  namespace str
28  {
53 
55 
56  class smatch;
57  class regex;
58 
67  bool regex_match( const char * s, smatch & matches, const regex & regex );
68 
70  inline bool regex_match(const std::string & s, smatch & matches, const regex & regex)
71  { return regex_match( s.c_str(), matches, regex ); }
72 
74  bool regex_match( const char * s, const regex & regex );
75 
77  inline bool regex_match( const std::string & s, const regex & regex )
78  { return regex_match( s.c_str(), regex ); }
79 
86  std::string regex_substitute ( const std::string & s, const regex & regex, const std::string &replacement, bool global = true );
87 
94  class regex
95  {
96  public:
97 
98  enum RegFlags {
99  icase = REG_ICASE,
100  nosubs = REG_NOSUB,
101  match_extended = REG_EXTENDED,
102  newline = REG_NEWLINE,
104  };
105 
106  enum MatchFlags {
107  none = 0,
108  not_bol = REG_NOTBOL
109  };
110 
111  regex();
112  regex( const std::string & s, int flags = rxdefault );
113  regex( const char* s, int flags = rxdefault ) : regex( std::string(s?s:""), flags ) {}
114  ~regex();
115 
116  regex( const regex & rhs )
117  { assign( rhs.m_str, rhs.m_flags ); }
118 
119  regex & operator=( const regex & rhs )
120  { assign( rhs.m_str, rhs.m_flags ); return *this; }
121 
125  std::string asString() const
126  { return m_str; }
127 
128  bool matches( const char * s, str::smatch & matches, int flags = none ) const;
129  bool matches( const std::string & s_r, str::smatch & matches_r, int flags_r = none ) const
130  { return matches( s_r.c_str(), matches_r, flags_r ); }
131 
132  bool matches( const char * s ) const;
133  bool matches( const std::string & s_r ) const
134  { return matches( s_r.c_str() ); }
135 
136  public:
138  regex_t * get()
139  { return & m_preg; }
140 
141  private:
142  void assign( const std::string & s, int flags );
143 
144  private:
145  friend class smatch;
146  std::string m_str;
147  int m_flags;
148  regex_t m_preg;
149  bool m_valid = false;
150  };
151 
153  inline std::ostream & operator<<( std::ostream & str, const regex & obj )
154  { return str << obj.asString(); }
155 
167  class smatch
168  {
169  public:
170  smatch();
171 
172  std::string operator[](unsigned i) const;
173 
174  unsigned size() const;
175 
177  std::string::size_type begin( unsigned i ) const;
178 
180  std::string::size_type end( unsigned i ) const;
181 
183  std::string::size_type size( unsigned i ) const;
184 
185  std::string match_str;
186  std::vector<regmatch_t> pmatch;
187  };
188 
189  } // namespace str
191 } // namespace zypp
193 #endif // ZYPP_BASE_STRING_H
Base class for Exception.
Definition: Exception.h:146
Regular expression.
Definition: Regex.h:95
std::ostream & operator<<(std::ostream &str, const regex &obj)
Stream output.
Definition: Regex.h:153
bool matches(const std::string &s_r) const
Definition: Regex.h:133
regex(const char *s, int flags=rxdefault)
Definition: Regex.h:113
regex_t m_preg
Definition: Regex.h:148
std::string m_str
Definition: Regex.h:146
@ match_extended
Use POSIX Extended Regular Expression syntax when interpreting regex.
Definition: Regex.h:101
@ icase
Do not differentiate case.
Definition: Regex.h:99
@ newline
Match newline.
Definition: Regex.h:102
@ rxdefault
These are enforced even if you don't pass them as flag argument.
Definition: Regex.h:103
@ nosubs
Support for substring addressing of matches is not required.
Definition: Regex.h:100
std::string asString() const
string representation of the regular expression
Definition: Regex.h:125
bool m_valid
Definition: Regex.h:149
void assign(const std::string &s, int flags)
Definition: Regex.cc:36
bool matches(const std::string &s_r, str::smatch &matches_r, int flags_r=none) const
Definition: Regex.h:129
regex & operator=(const regex &rhs)
Definition: Regex.h:119
bool matches(const char *s, str::smatch &matches, int flags=none) const
Definition: Regex.cc:57
@ not_bol
Do not match begin of line.
Definition: Regex.h:108
regex(const regex &rhs)
Definition: Regex.h:116
regex_t * get()
Expert backdoor.
Definition: Regex.h:138
Regular expression match result.
Definition: Regex.h:168
unsigned size() const
Definition: Regex.cc:106
std::string::size_type end(unsigned i) const
End index of subexpression i in match_str (or std::string::npos)
Definition: Regex.cc:100
std::string::size_type begin(unsigned i) const
Begin index of subexpression i in match_str (or std::string::npos)
Definition: Regex.cc:97
std::string operator[](unsigned i) const
Definition: Regex.cc:89
std::string match_str
Definition: Regex.h:185
std::vector< regmatch_t > pmatch
Definition: Regex.h:186
bool regex_match(const char *s, smatch &matches, const regex &regex)
Regular expression matching.
Definition: Arch.h:348
String related utilities and Regular expression matching.
SolvableIdType size_type
Definition: PoolMember.h:126
std::string regex_substitute(const std::string &s, const regex &regex, const std::string &replacement, bool global=true)
Replaces the matched regex with the string passed in replacement.
Definition: Regex.cc:120
bool regex_match(const std::string &s, smatch &matches, const regex &regex)
\relates regex \ingroup ZYPP_STR_REGEX \relates regex \ingroup ZYPP_STR_REGEX
Definition: Regex.h:70
Exception regex_error
Definition: Regex.h:54
Easy-to use interface to the ZYPP dependency resolver.
Definition: CodePitfalls.doc:2