Implement HA's ASC and HSC algorithms.

ha/internal.h

@@ -0,0 +1,45 @@
+
+/***********************************************************************
+  Modified to work with memory buffers instead of files by
+  Copyright (C) 2005 Natalia Portillo
+************************************************************************/
+
+#ifndef INTERNAL_H
+#define INTERNAL_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+/* Type definitions matching original HA code */
+typedef int16_t  S16B;
+typedef uint16_t U16B;
+typedef int32_t  S32B;
+typedef uint32_t U32B;
+
+/* Memory buffer management */
+typedef struct
+{
+    const unsigned char *data;
+    size_t               size;
+    size_t               pos;
+    int                  error;
+} input_buffer_t;
+
+typedef struct
+{
+    unsigned char *data;
+    size_t         size;
+    size_t         pos;
+    size_t         max_size;
+    int            error;
+} output_buffer_t;
+
+/* Decompression context */
+typedef struct
+{
+    input_buffer_t  input;
+    output_buffer_t output;
+    int             algorithm;
+} decompress_context_t;
+
+#endif /* INTERNAL_H */