mirror of
https://github.com/libretro/scummvm.git
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162 lines
3.9 KiB
C++
162 lines
3.9 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2004 The ScummVM project
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*
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* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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// Type SDataWord_T must be unpadded
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#include "saga/saga.h"
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#include "saga/gfx.h"
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#include "saga/script.h"
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#include "saga/sdata.h"
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namespace Saga {
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SData::SData() {
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unsigned int i;
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void *alloc_ptr;
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debug(0, "Initializing script data buffers");
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for (i = 0; i < R_SCRIPT_DATABUF_NUM; i++) {
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alloc_ptr = malloc(sizeof *_vm->_script->dataBuffer(0));
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if (alloc_ptr == NULL) {
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error("Couldn't allocate memory for script data buffer %d", i);
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}
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_vm->_script->setBuffer(i, (R_SCRIPT_DATABUF *)alloc_ptr);
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alloc_ptr = calloc(R_SCRIPT_DATABUF_LEN, sizeof(SDataWord_T));
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if (alloc_ptr == NULL) {
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error("Couldn't allocate memory for script data buffer %d", i);
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}
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_vm->_script->dataBuffer(i)->len = R_SCRIPT_DATABUF_LEN;
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_vm->_script->dataBuffer(i)->data = (SDataWord_T *)alloc_ptr;
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}
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}
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SData::~SData() {
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}
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int SData::getWord(int n_buf, int n_word, SDataWord_T *data) {
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if ((n_buf < 0) || (n_buf >= R_SCRIPT_DATABUF_NUM)) {
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return R_FAILURE;
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}
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if ((n_word < 0) || (n_word >= _vm->_script->dataBuffer(n_buf)->len)) {
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return R_FAILURE;
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}
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if (data == NULL) {
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return R_FAILURE;
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}
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*data = _vm->_script->dataBuffer(n_buf)->data[n_word];
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return R_SUCCESS;
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}
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int SData::putWord(int n_buf, int n_word, SDataWord_T data) {
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if ((n_buf < 0) || (n_buf >= R_SCRIPT_DATABUF_NUM)) {
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return R_FAILURE;
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}
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if ((n_word < 0) || (n_word >= _vm->_script->dataBuffer(n_buf)->len)) {
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return R_FAILURE;
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}
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_vm->_script->dataBuffer(n_buf)->data[n_word] = data;
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return R_SUCCESS;
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}
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int SData::setBit(int n_buf, SDataWord_T n_bit, int bitstate) {
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int n_word;
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int n_bitpos;
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SDataWord_T bit_pattern = 0x01;
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if ((n_buf < 0) || (n_buf >= R_SCRIPT_DATABUF_NUM)) {
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return R_FAILURE;
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}
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if (n_bit >= (unsigned long)_vm->_script->dataBuffer(n_buf)->len * (sizeof(SDataWord_T) * CHAR_BIT)) {
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return R_FAILURE;
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}
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n_word = n_bit / (sizeof(SDataWord_T) * CHAR_BIT);
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n_bitpos = n_bit % (sizeof(SDataWord_T) * CHAR_BIT);
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bit_pattern <<= ((sizeof(SDataWord_T) * CHAR_BIT) - (n_bitpos + 1));
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if (bitstate) {
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_vm->_script->dataBuffer(n_buf)->data[n_word] |= bit_pattern;
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} else {
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_vm->_script->dataBuffer(n_buf)->data[n_word] &= ~bit_pattern;
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}
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return R_SUCCESS;
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}
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int SData::getBit(int n_buf, SDataWord_T n_bit, int *bitstate) {
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int n_word;
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int n_bitpos;
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SDataWord_T bit_pattern = 0x01;
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if ((n_buf < 0) || (n_buf >= R_SCRIPT_DATABUF_NUM)) {
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return R_FAILURE;
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}
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if (n_bit >= (SDataWord_T) _vm->_script->dataBuffer(n_buf)->len * (sizeof(SDataWord_T) * CHAR_BIT)) {
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return R_FAILURE;
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}
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n_word = n_bit / (sizeof(SDataWord_T) * CHAR_BIT);
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n_bitpos = n_bit % (sizeof(SDataWord_T) * CHAR_BIT);
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bit_pattern <<= ((sizeof(SDataWord_T) * CHAR_BIT) - (n_bitpos + 1));
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*bitstate = (_vm->_script->dataBuffer(n_buf)->data[n_word] & bit_pattern) ? 1 : 0;
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return R_SUCCESS;
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}
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int SData::readWordS(SDataWord_T word) {
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uint16 u_int = word;
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int s_int;
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if (u_int & 0x8000U) {
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s_int = (int)(u_int - 0x8000U) - 0x7FFF - 1;
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} else {
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s_int = u_int;
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}
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return s_int;
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}
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uint16 SData::readWordU(SDataWord_T word) {
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uint16 u_int = (uint16) word;
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return u_int;
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}
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} // End of namespace Saga
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