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123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2006 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/stdafx.h"
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#include "common/stream.h"
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#include "common/str.h"
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namespace Common {
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void WriteStream::writeString(const String &str) {
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write(str.c_str(), str.size());
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}
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void MemoryReadStream::seek(int32 offs, int whence) {
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// Pre-Condition
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assert(_pos <= _bufSize);
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switch (whence) {
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case SEEK_END:
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// SEEK_END works just like SEEK_SET, only 'reversed',
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// i.e. from the end.
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offs = _bufSize - offs;
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// Fall through
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case SEEK_SET:
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_ptr = _ptrOrig + offs;
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_pos = offs;
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break;
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case SEEK_CUR:
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_ptr += offs;
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_pos += offs;
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break;
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}
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// Post-Condition
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assert(_pos <= _bufSize);
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}
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#define LF 0x0A
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#define CR 0x0D
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char *SeekableReadStream::readLine(char *buf, size_t bufSize) {
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assert(buf && bufSize > 0);
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char *p = buf;
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size_t len = 0;
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char c;
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if (buf == 0 || bufSize == 0 || eos()) {
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return 0;
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}
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// We don't include the newline character(s) in the buffer, and we
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// always terminate it - we never read more than len-1 characters.
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// EOF is treated as a line break, unless it was the first character
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// that was read.
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// 0 is treated as a line break, even though it should never occur in
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// a text file.
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// DOS and Windows use CRLF line breaks
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// Unix and OS X use LF line breaks
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// Macintosh before OS X uses CR line breaks
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c = readByte();
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if (eos() || ioFailed()) {
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return 0;
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}
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while (!eos() && len + 1 < bufSize) {
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if (ioFailed())
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return 0;
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if (c == 0 || c == LF)
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break;
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if (c == CR) {
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c = readByte();
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if (c != LF && !eos())
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seek(-1, SEEK_CUR);
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break;
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}
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*p++ = c;
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len++;
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c = readByte();
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}
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// This should fix a bug while using readLine with Common::File
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// it seems that it sets the eos flag after an invalid read
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// and at the same time the ioFailed flag
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// the config file parser fails out of that reason for the new themes
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if (eos()) {
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clearIOFailed();
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}
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*p = 0;
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return buf;
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}
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} // End of namespace Common
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