SC1 unpacking tools

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@2767 8092fc87-c524-0410-9efc-e669fe64eaf9
2007-06-01 14:01:14 +00:00
parent c9095d9793
commit 325a882c5d
13 changed files with 1653 additions and 0 deletions
@@ -0,0 +1,44 @@
+// Reverse engineered from the Star Control executable.
+
+#ifndef _HUFF_H
+#define _HUFF_H
+
+typedef struct Huff_Code Huff_Code;
+typedef struct Huff_Context Huff_Context;
+
+#include "dostypes.h"
+#include "../../shared/cbytesex.h"
+
+
+struct Huff_Code {
+	WORD field_0;
+	BYTE value;
+	BYTE len;
+};
+
+struct Huff_Context {
+	Huff_Code codes[0x100];
+	WORD codeCount;
+	WORD maxCodeLen;
+	bool (*lookupCodeFunc)(Huff_Context *ctx, DWORD *result);
+
+	BitStreamContext *bsc;
+
+	union {
+		BYTE topCodeIndexLen;
+				// Number of bits in the index of the top code.
+		BYTE codeIndices[16];
+				// Index into 'codes' to the first code with some length.
+	} u;
+};
+
+Huff_Context *Huff_new(BitStreamContext *bsc, WORD codeCount);
+void Huff_delete(Huff_Context *ctx);
+
+static inline bool
+Huff_getCode(Huff_Context *ctx, DWORD *result) {
+	return ctx->lookupCodeFunc(ctx, result);
+}
+
+#endif  /* _HUFF_H */
+