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// Copyright 2015 The Shaderc Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef LIBSHADERC_UTIL_SRC_FILE_FINDER_H_
#define LIBSHADERC_UTIL_SRC_FILE_FINDER_H_
#include <string>
#include <vector>
namespace shaderc_util {
// Finds files within a search path.
class FileFinder {
public:
// Searches for a read-openable file based on filename, which must be
// non-empty. The search is attempted on filename prefixed by each element of
// search_path() in turn. The first hit is returned, or an empty string if
// there are no hits. Search attempts treat their argument the way
// std::fopen() treats its filename argument, blind to whether the path is
// absolute or relative.
//
// If a search_path() element is non-empty and not ending in a slash, then a
// slash is inserted between it and filename before its search attempt. An
// empty string in search_path() means that the filename is tried as-is.
std::string FindReadableFilepath(const std::string& filename) const;
// Searches for a read-openable file based on filename, which must be
// non-empty. The search is first attempted as a path relative to
// the requesting_file parameter. If no file is found relative to the
// requesting_file then this acts as FindReadableFilepath does. If
// requesting_file does not contain a '/' or a '\' character then it is
// assumed to be a filename and the request will be relative to the
// current directory.
std::string FindRelativeReadableFilepath(const std::string& requesting_file,
const std::string& filename) const;
// Search path for Find(). Users may add/remove elements as desired.
std::vector<std::string>& search_path() { return search_path_; }
private:
std::vector<std::string> search_path_;
};
} // namespace shaderc_util
#endif // LIBSHADERC_UTIL_SRC_FILE_FINDER_H_
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