mirror of https://github.com/ksherlock/mpw.git
159 lines
2.9 KiB
Ragel
159 lines
2.9 KiB
Ragel
/*
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* Copyright (c) 2013, Kelvin W Sherlock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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*
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* file -> file
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* :directory:file -> directory/file
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* volume:directory -> /volume/directory
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* :: -> ../
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* ::: -> ../../
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*/
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%%{
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machine m;
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main := |*
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':' {2,} {
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// :: = ..
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// ::: = ../..
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// etc
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unsigned count = te - ts;
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if (ts != begin)
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{
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rv.push_back('/');
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}
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for (unsigned i = 1; i < count; ++i)
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{
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rv.append("../");
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}
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};
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':' {
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if (ts != begin)
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rv.push_back('/');
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};
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any {
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rv.push_back(*ts);
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};
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*|;
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}%%
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#include <string>
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#include "mpw.h"
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namespace {
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%%write data;
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}
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namespace MPW {
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std::string ExpandPathVariables(std::string);
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std::string ExpandPath(std::string s)
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{
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std::string rv;
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// 1. expand any variables.
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#ifndef TESTING
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if (s.find('{') != s.npos)
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{
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s = ExpandPathVariables(s);
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}
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#endif
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// 2. does it even need it?
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unsigned sep = 0;
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for (char c : s)
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{
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if (c == ':' || c == '/')
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{
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sep = c;
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break;
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}
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}
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if (!sep) return s;
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// convert volume:path to /volume/path
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// leading / manually placed.
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if (sep == ':' && s.front() != ':')
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rv.push_back('/');
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auto begin = s.c_str();
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auto p = begin;
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auto pe = p + s.length();
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auto eof = pe;
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const char *ts;
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const char *te;
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int cs;
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int act;
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%%write init;
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%%write exec;
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return rv;
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}
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}
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#if TESTING
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#include <cstdio>
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int main(int argc, char **argv)
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{
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for (int i = 1; i < argc; ++i)
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{
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std::string s(argv[i]);
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printf("%s -> ", s.c_str());
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s = MPW::ExpandPath(s);
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printf("%s\n", s.c_str());
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}
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return 0;
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}
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#endif
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