C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.
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54 lines
1.3 KiB
54 lines
1.3 KiB
/** @file |
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$Id$ |
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$Date$ |
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$Author$ |
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@copy © Marc Wäckerlin |
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@license LGPL, see file <a href="license.html">COPYING</a> |
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$Log$ |
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Revision 1.2 2004/12/16 13:09:31 marc |
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possibility to evaluate and extract sub expressions |
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Revision 1.1 2004/12/14 20:20:30 marc |
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initial version |
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*/ |
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#include <mrw/string.hxx> |
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#include <mrw/regexp.hxx> |
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#include <mrw/exception.hxx> |
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namespace mrw { |
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RegExp::RegExp(const std::string& pattern, bool hassub, int flags) |
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: |
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_hassub(hassub) { |
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if (flags&nosub) throw mrw::invalid_argument("nosub"); |
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if (regcomp(&_regex, pattern.c_str(), (_hassub?flags:(flags|nosub)))) |
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throw mrw::invalid_argument(pattern); |
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} |
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RegExp::~RegExp() noexcept { |
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regfree(&_regex); |
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} |
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bool RegExp::operator()(const std::string& text) { |
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if (_hassub) |
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return !regexec(&_regex, (_text=text).c_str(), MAX_SUB, _sub, 0); |
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else |
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return !regexec(&_regex, text.c_str(), 0, 0, 0); |
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} |
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std::string RegExp::operator[](unsigned int n) const { |
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if (!_hassub) |
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throw mrw::invalid_argument("initialized with no sub expressions"); |
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if (n>=MAX_SUB || _sub[n].rm_so<0 || _sub[n].rm_eo<0) |
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throw mrw::invalid_argument(mrw::string(n)); |
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return _text.substr(_sub[n].rm_so, _sub[n].rm_eo-_sub[n].rm_so); |
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} |
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}
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