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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "parallaction/parallaction.h"
namespace Parallaction {
char _tokens[20][40];
Script::Script(Common::ReadStream *input, bool disposeSource) : _input(input), _disposeSource(disposeSource), _line(0) {
}
Script::~Script() {
if (_disposeSource)
delete _input;
}
char *Script::readLine(char *buf, size_t bufSize) {
uint16 _si;
char v2 = 0;
for ( _si = 0; _si<bufSize; _si++) {
v2 = _input->readSByte();
if (v2 == 0xA || v2 == 0xD || _input->eos()) break;
if (!_input->eos() && _si < bufSize) buf[_si] = v2;
}
_line++;
if (_si == 0 && _input->eos())
return 0;
buf[_si] = 0xA;
buf[_si+1] = '\0';
return buf;
}
void Script::clearTokens() {
for (uint16 i = 0; i < 20; i++)
_tokens[i][0] = '\0';
return;
}
void Script::skip(const char* endToken) {
while (scumm_stricmp(_tokens[0], endToken)) {
readLineToken(true);
}
}
//
// Scans 's' until one of the stop-chars in 'brk' is found, building a token.
// If the routine encounters quotes, it will extract the contained text and
// make a proper token. When scanning inside quotes, 'brk' is ignored and
// only newlines are considered stop-chars.
//
// The routine returns the unparsed portion of the input string 's'.
//
char *parseNextToken(char *s, char *tok, uint16 count, const char *brk, bool ignoreQuotes) {
enum STATES { NORMAL, QUOTED };
STATES state = NORMAL;
while (count > 0) {
switch (state) {
case NORMAL:
if (*s == '\0') {
*tok = '\0';
return s;
}
if (strchr(brk, *s)) {
*tok = '\0';
return ++s;
}
if (*s == '"') {
if (ignoreQuotes) {
*tok++ = *s++;
count--;
} else {
state = QUOTED;
s++;
}
} else {
*tok++ = *s++;
count--;
}
break;
case QUOTED:
if (*s == '\0') {
*tok = '\0';
return s;
}
if (*s == '"' || *s == '\n' || *s == '\t') {
*tok = '\0';
return ++s;
}
*tok++ = *s++;
count--;
break;
}
}
*tok = '\0';
// TODO: if execution flows here, make *REALLY* sure everything has been parsed
// out of the input string. This is what is supposed to happen, but never ever
// allocated time to properly check.
return tok;
}
uint16 Script::fillTokens(char* line) {
uint16 i = 0;
while (strlen(line) > 0 && i < 20) {
line = parseNextToken(line, _tokens[i], 40, " \t\n");
line = Common::ltrim(line);
i++;
}
return i;
}
uint16 Script::readLineToken(bool errorOnEOF) {
clearTokens();
char buf[200];
char *line = NULL;
do {
line = readLine(buf, 200);
if (line == NULL) {
if (errorOnEOF)
error("unexpected end of file while parsing");
else
return 0;
}
line = Common::ltrim(line);
} while (strlen(line) == 0 || line[0] == '#');
return fillTokens(line);
}
} // namespace Parallaction
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