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-rw-r--r--common/winexe.cpp82
1 files changed, 82 insertions, 0 deletions
diff --git a/common/winexe.cpp b/common/winexe.cpp
index fc389f6ea6..fd1d565036 100644
--- a/common/winexe.cpp
+++ b/common/winexe.cpp
@@ -20,6 +20,8 @@
*
*/
+#include "common/file.h"
+#include "common/memstream.h"
#include "common/str.h"
#include "common/winexe.h"
@@ -78,4 +80,84 @@ String WinResourceID::toString() const {
return "";
}
+bool WinResources::loadFromEXE(const String &fileName) {
+ if (fileName.empty())
+ return false;
+
+ File *file = new File();
+
+ if (!file->open(fileName)) {
+ delete file;
+ return false;
+ }
+
+ return loadFromEXE(file);
+}
+
+bool WinResources::loadFromCompressedEXE(const String &fileName) {
+ // Based on http://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html
+
+ // TODO: Merge this with with loadFromEXE() so the handling of the compressed
+ // EXE's is transparent
+
+ File file;
+
+ if (!file.open(fileName))
+ return false;
+
+ // First part of the signature
+ if (file.readUint32BE() != MKTAG('S','Z','D','D'))
+ return false;
+
+ // Second part of the signature
+ if (file.readUint32BE() != 0x88F02733)
+ return false;
+
+ // Compression mode must be 'A'
+ if (file.readByte() != 'A')
+ return false;
+
+ file.readByte(); // file name character change
+ uint32 unpackedLength = file.readUint32LE();
+
+ byte *window = new byte[0x1000];
+ int pos = 0x1000 - 16;
+ memset(window, 0x20, 0x1000); // Initialize to all spaces
+
+ byte *unpackedData = (byte *)malloc(unpackedLength);
+ assert(unpackedData);
+ byte *dataPos = unpackedData;
+
+ // Apply simple LZSS decompression
+ for (;;) {
+ byte controlByte = file.readByte();
+
+ if (file.eos())
+ break;
+
+ for (byte i = 0; i < 8; i++) {
+ if (controlByte & (1 << i)) {
+ *dataPos++ = window[pos++] = file.readByte();
+ pos &= 0xFFF;
+ } else {
+ int matchPos = file.readByte();
+ int matchLen = file.readByte();
+ matchPos |= (matchLen & 0xF0) << 4;
+ matchLen = (matchLen & 0xF) + 3;
+ while (matchLen--) {
+ *dataPos++ = window[pos++] = window[matchPos++];
+ pos &= 0xFFF;
+ matchPos &= 0xFFF;
+ }
+ }
+
+ }
+ }
+
+ delete[] window;
+ SeekableReadStream *stream = new MemoryReadStream(unpackedData, unpackedLength);
+
+ return loadFromEXE(stream);
+}
+
} // End of namespace Common