Harmonized SaveFile API with File API a bit.

svn-id: r9626

1 files changed, 131 insertions, 0 deletions

diff --git a/common/savefile.cpp b/common/savefile.cpp
new file mode 100644
index 0000000000..7d99f0e5d3
--- /dev/null
+++ b/common/savefile.cpp
@@ -0,0 +1,131 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2002-2003 The ScummVM project
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * $Header$
+ *
+ */
+
+#include "common/savefile.h"
+#include "common/util.h"
+#include "common/engine.h"	// For debug/warning/error
+
+uint32 SaveFile::read(void *ptr, uint32 size)
+{
+	return fread(ptr, 1, size);
+}
+
+byte SaveFile::readByte()
+{
+	byte b;
+	if (fread(&b, 1, 1) != 1)
+		return 0;
+	return b;
+}
+
+uint16 SaveFile::readUint16LE() {
+	uint16 a = readByte();
+	uint16 b = readByte();
+	return a | (b << 8);
+}
+
+uint32 SaveFile::readUint32LE() {
+	uint32 a = readUint16LE();
+	uint32 b = readUint16LE();
+	return (b << 16) | a;
+}
+
+uint16 SaveFile::readUint16BE() {
+	uint16 b = readByte();
+	uint16 a = readByte();
+	return a | (b << 8);
+}
+
+uint32 SaveFile::readUint32BE() {
+	uint32 b = readUint16BE();
+	uint32 a = readUint16BE();
+	return (b << 16) | a;
+}
+
+uint32 SaveFile::write(const void *ptr, uint32 size)
+{
+	return fwrite(ptr, 1, size);
+}
+
+void SaveFile::writeByte(byte value)
+{
+	fwrite(&value, 1, 1);
+}
+
+void SaveFile::writeUint16LE(uint16 value) {
+	writeByte((byte)(value & 0xff));
+	writeByte((byte)(value >> 8));
+}
+
+void SaveFile::writeUint32LE(uint32 value) {
+	writeUint16LE((uint16)(value & 0xffff));
+	writeUint16LE((uint16)(value >> 16));
+}
+
+void SaveFile::writeUint16BE(uint16 value) {
+	writeByte((byte)(value >> 8));
+	writeByte((byte)(value & 0xff));
+}
+
+void SaveFile::writeUint32BE(uint32 value) {
+	writeUint16BE((uint16)(value >> 16));
+	writeUint16BE((uint16)(value & 0xffff));
+}
+
+SaveFile *SaveFileManager::open_savefile(const char *filename, const char *directory, bool saveOrLoad)
+{
+	char buf[256];
+	join_paths(filename, directory, buf, sizeof(buf));
+	StdioSaveFile *sf = new StdioSaveFile(buf,
+					      (saveOrLoad? "wb":"rb"));
+	if (!sf->is_open()) {
+		delete sf;
+		sf = NULL;
+	}
+	return sf;
+}
+
+void SaveFileManager::join_paths(const char *filename, const char *directory,
+				 char *buf, int bufsize)
+{
+	buf[bufsize-1] = '\0';
+	strncpy(buf, directory, bufsize-1);
+
+#ifdef WIN32
+	// Fix for Win98 issue related with game directory pointing to root drive ex. "c:\"
+	if ((buf[0] != 0) && (buf[1] == ':') && (buf[2] == '\\') && (buf[3] == 0)) {
+		buf[2] = 0;
+	}
+#endif
+
+	const int dirLen = strlen(buf);
+
+	if (dirLen > 0) {
+#ifdef __MORPHOS__
+		if (buf[dirLen-1] != ':' && buf[dirLen-1] != '/')
+#endif
+
+#if !defined(__GP32__) && !defined(__PALM_OS__)
+		strncat(buf, "/", bufsize-1);	// prevent double /
+#endif
+	}
+	strncat(buf, filename, bufsize-1);
+}