1 /* ScummVM - Graphic Adventure Engine
2 *
3 * ScummVM is the legal property of its developers, whose names
4 * are too numerous to list here. Please refer to the COPYRIGHT
5 * file distributed with this source distribution.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 *
21 */
22
23 /*
24 * This code is based on Broken Sword 2.5 engine
25 *
26 * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
27 *
28 * Licensed under GNU GPL v2
29 *
30 */
31
32 #include "common/textconsole.h"
33
34 #include "sword25/kernel/inputpersistenceblock.h"
35
36 namespace Sword25 {
37
InputPersistenceBlock(const void * data,uint dataLength,int version)38 InputPersistenceBlock::InputPersistenceBlock(const void *data, uint dataLength, int version) :
39 _data(static_cast<const byte *>(data), dataLength),
40 _errorState(NONE),
41 _version(version) {
42 _iter = _data.begin();
43 }
44
~InputPersistenceBlock()45 InputPersistenceBlock::~InputPersistenceBlock() {
46 if (_iter != _data.end())
47 warning("Persistence block was not read to the end.");
48 }
49
read(int16 & value)50 void InputPersistenceBlock::read(int16 &value) {
51 int32 v;
52 read(v);
53 value = static_cast<int16>(v);
54 }
55
read(int32 & value)56 void InputPersistenceBlock::read(int32 &value) {
57 if (checkMarker(SINT_MARKER)) {
58 value = (int32)READ_LE_UINT32(_iter);
59 _iter += 4;
60 } else {
61 value = 0;
62 }
63 }
64
read(uint32 & value)65 void InputPersistenceBlock::read(uint32 &value) {
66 if (checkMarker(UINT_MARKER)) {
67 value = READ_LE_UINT32(_iter);
68 _iter += 4;
69 } else {
70 value = 0;
71 }
72 }
73
read(float & value)74 void InputPersistenceBlock::read(float &value) {
75 if (checkMarker(FLOAT_MARKER)) {
76 uint32 tmp[1];
77 tmp[0] = READ_LE_UINT32(_iter);
78 value = ((float *)tmp)[0];
79 _iter += 4;
80 } else {
81 value = 0.0f;
82 }
83 }
84
read(bool & value)85 void InputPersistenceBlock::read(bool &value) {
86 if (checkMarker(BOOL_MARKER)) {
87 uint uintBool = READ_LE_UINT32(_iter);
88 _iter += 4;
89 value = uintBool != 0;
90 } else {
91 value = false;
92 }
93 }
94
readString(Common::String & value)95 void InputPersistenceBlock::readString(Common::String &value) {
96 value = "";
97
98 if (checkMarker(STRING_MARKER)) {
99 uint32 size;
100 read(size);
101
102 if (checkBlockSize(size)) {
103 value = Common::String(reinterpret_cast<const char *>(&*_iter), size);
104 _iter += size;
105 }
106 }
107 }
108
readByteArray(Common::Array<byte> & value)109 void InputPersistenceBlock::readByteArray(Common::Array<byte> &value) {
110 if (checkMarker(BLOCK_MARKER)) {
111 uint32 size;
112 read(size);
113
114 if (checkBlockSize(size)) {
115 value = Common::Array<byte>(_iter, size);
116 _iter += size;
117 }
118 }
119 }
120
checkBlockSize(int size)121 bool InputPersistenceBlock::checkBlockSize(int size) {
122 if (_data.end() - _iter >= size) {
123 return true;
124 } else {
125 _errorState = END_OF_DATA;
126 error("Unexpected end of persistence block.");
127 return false;
128 }
129 }
130
checkMarker(byte marker)131 bool InputPersistenceBlock::checkMarker(byte marker) {
132 if (!isGood() || !checkBlockSize(1))
133 return false;
134
135 if (*_iter++ == marker) {
136 return true;
137 } else {
138 _errorState = OUT_OF_SYNC;
139 error("Wrong type marker found in persistence block.");
140 return false;
141 }
142 }
143
144 } // End of namespace Sword25
145