1 /* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
2 * Copyright (C) 2011-2017 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License as published by
6 * the Free Software Foundation, either version 2.1 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #ifdef MT32EMU_SHARED
19 #include <locale>
20 #endif
21
22 #include "internals.h"
23
24 // Disable MSVC STL exceptions
25 #ifdef _MSC_VER
26 #define _HAS_EXCEPTIONS 0
27 #endif
28 #include "FileStream.h"
29
30 namespace MT32Emu {
31
configureSystemLocale()32 static inline void configureSystemLocale() {
33 #ifdef MT32EMU_SHARED
34 static bool configured = false;
35
36 if (configured) return;
37 configured = true;
38 std::locale::global(std::locale(""));
39 #endif
40 }
41
42 using std::ios_base;
43
FileStream()44 FileStream::FileStream() : ifsp(*new std::ifstream), data(NULL), size(0)
45 {}
46
~FileStream()47 FileStream::~FileStream() {
48 // destructor closes ifsp
49 delete &ifsp;
50 delete[] data;
51 }
52
getSize()53 size_t FileStream::getSize() {
54 if (size != 0) {
55 return size;
56 }
57 if (!ifsp.is_open()) {
58 return 0;
59 }
60 ifsp.seekg(0, ios_base::end);
61 size = size_t(ifsp.tellg());
62 return size;
63 }
64
getData()65 const Bit8u *FileStream::getData() {
66 if (data != NULL) {
67 return data;
68 }
69 if (!ifsp.is_open()) {
70 return NULL;
71 }
72 if (getSize() == 0) {
73 return NULL;
74 }
75 Bit8u *fileData = new Bit8u[size];
76 if (fileData == NULL) {
77 return NULL;
78 }
79 ifsp.seekg(0);
80 ifsp.read(reinterpret_cast<char *>(fileData), std::streamsize(size));
81 if (size_t(ifsp.tellg()) != size) {
82 delete[] fileData;
83 return NULL;
84 }
85 data = fileData;
86 close();
87 return data;
88 }
89
open(const char * filename)90 bool FileStream::open(const char *filename) {
91 configureSystemLocale();
92 ifsp.clear();
93 ifsp.open(filename, ios_base::in | ios_base::binary);
94 return !ifsp.fail();
95 }
96
close()97 void FileStream::close() {
98 ifsp.close();
99 ifsp.clear();
100 }
101
102 } // namespace MT32Emu
103