forked from lix-project/lix
104e55bb7f
So you can now do things like: $ nix-env -qa '.*zip.*' $ nix-env -qa '.*(firefox|chromium).*'
34 lines
754 B
C++
34 lines
754 B
C++
#include "regex.hh"
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#include "types.hh"
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namespace nix {
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Regex::Regex(const string & pattern)
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{
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/* Patterns must match the entire string. */
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int err = regcomp(&preg, ("^(" + pattern + ")$").c_str(), REG_NOSUB | REG_EXTENDED);
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if (err) throw Error(format("compiling pattern ‘%1%’: %2%") % pattern % showError(err));
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}
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Regex::~Regex()
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{
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regfree(&preg);
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}
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bool Regex::matches(const string & s)
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{
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int err = regexec(&preg, s.c_str(), 0, 0, 0);
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if (err == 0) return true;
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else if (err == REG_NOMATCH) return false;
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throw Error(format("matching string ‘%1%’: %2%") % s % showError(err));
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}
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string Regex::showError(int err)
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{
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char buf[256];
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regerror(err, &preg, buf, sizeof(buf));
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return string(buf);
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}
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}
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