204 lines
4.4 KiB
Ragel
204 lines
4.4 KiB
Ragel
/*
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* This file is part of libgim.
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*
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* libgim is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* libgim is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
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#include "version.hpp"
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#include <cstring>
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#include <stdexcept>
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#include "debug.hpp"
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using namespace util;
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//-----------------------------------------------------------------------------
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version::version ():
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size (0)
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{ ; }
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version::version (unsigned int _major,
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unsigned int _minor):
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size (2),
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release (RELEASE_PRODUCTION)
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{
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values[OFFSET_MAJOR] = _major;
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values[OFFSET_MINOR] = _minor;
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}
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version::version (const std::string& str):
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size (0)
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{
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*this = version::parse (str);
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}
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version::version (const char *str):
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size (0)
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{
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*this = version::parse (str);
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}
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//-----------------------------------------------------------------------------
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static void
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sanity (version::release_t r) {
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switch (r) {
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case version::RELEASE_ALPHA:
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case version::RELEASE_BETA:
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case version::RELEASE_GAMMA:
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case version::RELEASE_PRODUCTION:
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return;
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}
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panic ("invalid release_t value");
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}
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void
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version::sanity (void) const {
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::sanity (release);
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CHECK (size > 0);
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}
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//-----------------------------------------------------------------------------
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%%{
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machine version;
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action clear
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{ accum = 0; }
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action increment
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{ accum *= 10;
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accum += (uintptr_t)(fc - (unsigned char)'0'); }
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action finish
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{ v.values[v.size++] = accum ; }
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number = (digit+)
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>clear
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$increment
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%finish;
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dots = (number '.')* number;
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type = ('beta'i | 'b'i) %{ v.release = RELEASE_BETA; }
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| ('alpha'i | 'a'i) %{ v.release = RELEASE_ALPHA; }
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| ('gamma'i | 'g'i) %{ v.release = RELEASE_GAMMA; };
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version := (dots type?)
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$!{ throw std::invalid_argument (str); };
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write data;
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}%%
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//-----------------------------------------------------------------------------
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util::version
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util::version::parse (const std::string& str) {
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unsigned int accum;
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int cs;
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const char *p = str.data (),
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*pe = str.data () + str.size (),
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*eof = pe;
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version v;
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%%write init;
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%%write exec;
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return v;
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}
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util::version
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util::version::parse (const char *str) {
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return parse (std::string (str));
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}
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//-----------------------------------------------------------------------------
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static std::string
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release_to_string (version::release_t r) {
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sanity (r);
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static const char* RELEASE_STRINGS[] = {
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"a", // RELEASE_ALPHA
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"b", // RELEASE_BETA
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"g", // RELEASE_GAMMA
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"" // RELEASE_PRODUCTION
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};
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return RELEASE_STRINGS[r];
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}
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bool
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version::operator> (const version &rhs) const {
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unsigned int count = min (values.size (), rhs.values.size ());
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for (unsigned int i = 0; i < count; ++i)
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if (values[i] < rhs.values[i])
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return false;
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if (values.size () < rhs.values.size())
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return false;
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if (release <= rhs.release)
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return false;
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return true;
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}
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bool
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version::operator== (const version &rhs) const {
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return values == rhs.values &&
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size == rhs.size &&
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release == rhs.release;
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}
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std::ostream&
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operator <<(std::ostream& os, const util::version& rhs) {
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size_t elements = rhs.size;
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CHECK_HARD (elements > 0);
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os << rhs.major ();
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if (!--elements)
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goto done;
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os << "." << rhs.minor ();
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if (!--elements)
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goto done;
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os << "." << rhs.point ();
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if (!--elements)
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goto done;
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os << "." << rhs.build ();
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CHECK_EQ (--elements, 0);
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done:
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os << release_to_string (rhs.release);
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return os;
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}
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