120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "glk/comprehend/file_buf.h"
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#include "common/algorithm.h"
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#include "common/file.h"
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namespace Glk {
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namespace Comprehend {
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FileBuffer::FileBuffer(const Common::String &filename) : _pos(0) {
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// Open the file
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Common::File f;
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if (!f.open(Common::Path(filename)))
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error("Could not open - %s", filename.c_str());
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_data.resize(f.size());
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_readBytes.resize(f.size());
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f.read(&_data[0], f.size());
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}
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FileBuffer::FileBuffer(Common::ReadStream *stream, size_t size) : _pos(0) {
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_data.resize(size);
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_readBytes.resize(size);
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stream->read(&_data[0], size);
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}
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bool FileBuffer::exists(const Common::String &filename) {
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return Common::File::exists(Common::Path(filename));
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}
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void FileBuffer::close() {
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_data.clear();
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_readBytes.clear();
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_pos = 0;
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}
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bool FileBuffer::seek(int64 offset, int whence) {
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switch (whence) {
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case SEEK_SET:
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_pos = offset;
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break;
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case SEEK_CUR:
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_pos += offset;
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break;
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case SEEK_END:
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_pos = (int)_data.size() + offset;
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break;
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default:
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break;
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}
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return true;
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}
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uint32 FileBuffer::read(void *dataPtr, uint32 dataSize) {
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int32 bytesRead = CLIP((int32)dataSize, (int32)0, (int32)_data.size() - _pos);
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if (bytesRead) {
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Common::fill(&_readBytes[_pos], &_readBytes[_pos] + bytesRead, true);
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Common::copy(&_data[_pos], &_data[_pos] + bytesRead, (byte *)dataPtr);
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_pos += bytesRead;
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}
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return bytesRead;
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}
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size_t FileBuffer::strlen(bool *eof) {
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uint8 *end;
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if (eof)
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*eof = false;
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end = (uint8 *)memchr(&_data[_pos], '\0', size() - _pos);
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if (!end) {
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// No null terminator - string is remaining length
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if (eof)
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*eof = true;
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return size() - _pos;
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}
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return end - &_data[_pos];
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}
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void FileBuffer::showUnmarked() {
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int i, start = -1;
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for (i = 0; i < (int)_data.size(); i++) {
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if (!_readBytes[i] && start == -1)
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start = i;
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if ((_readBytes[i] || i == (int)_data.size() - 1) && start != -1) {
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warning("%.4x - %.4x unmarked (%d bytes)\n",
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start, i - 1, i - start);
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start = -1;
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}
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}
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}
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} // namespace Comprehend
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} // namespace Glk
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