98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
/*
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Unpack a local file.
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Copyright (C) 2019, Guillaume Gonnet
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This program is free software: you can redistribute it and/or modify it under
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the 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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This program 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 FOR A
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PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "formats/formats.h"
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#include "commands.h"
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namespace maconv {
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// Unpack two files (double format).
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static void UnPackDouble(fs::FileReader &reader, UnPacked &u)
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{
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for (auto &format : formats_double) {
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reader.Seek(0);
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// "read" returns true if the file is actually read.
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if (format.read(reader, u))
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return;
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}
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}
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// Unpack a single file.
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bool UnPackSingle(fs::File &file, fs::FileReader &reader)
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{
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for (auto &format : formats_single) {
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// Test if the file is in this format (if true, unpack it).
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reader.Seek(0);
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if (!format.test(reader))
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continue;
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reader.Seek(0);
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file.Reset();
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format.read(reader, file);
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return true;
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}
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return false;
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}
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// Unpack the first local file.
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static UnPacked UnPackFirstLocalFile(const std::string &input)
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{
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UnPacked u;
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u.n1 = input;
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// Read the input file given.
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int size = ReadLocalFile(input, u.d1);
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if (size == -1)
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StopOnError("can't read input file %s", input.c_str());
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// Unpack one or two files.
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fs::FileReader reader {u.d1.get(), static_cast<uint32_t>(size), input};
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if (!UnPackSingle(u.file, reader))
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UnPackDouble(reader, u); // Cannot fail ("rsrc" accepts all files).
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return u;
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}
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// Unpack a local file (recursively).
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UnPacked UnPackLocalFile(const std::string &input, bool recurs)
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{
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auto u = UnPackFirstLocalFile(input);
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while (recurs) {
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fs::FileReader reader {u.file};
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if (!UnPackSingle(u.file, reader))
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break;
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}
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return u;
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}
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} // namespace maconv
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