Implement HA's ASC and HSC algorithms.

ha/decompress.c

@@ -0,0 +1,70 @@
+
+/***********************************************************************
+  Modified to work with memory buffers instead of files by
+  Copyright (C) 2005 Natalia Portillo
+************************************************************************/
+
+#include "internal.h"
+#include "asc.h"
+#include "hsc.h"
+#include "../library.h"
+#include <string.h>
+
+int ha_algorithm_decompress(ha_algorithm_t       algorithm,
+                            const unsigned char *in_buf,
+                            size_t               in_len,
+                            unsigned char *      out_buf,
+                            size_t *             out_len)
+{
+    if(!in_buf || !out_buf || !out_len || in_len == 0) { return -1; }
+
+    decompress_context_t ctx;
+    memset(&ctx, 0, sizeof(ctx));
+
+    /* Initialize input buffer */
+    ctx.input.data  = in_buf;
+    ctx.input.size  = in_len;
+    ctx.input.pos   = 0;
+    ctx.input.error = 0;
+
+    /* Initialize output buffer */
+    ctx.output.data     = out_buf;
+    ctx.output.size     = 0;
+    ctx.output.pos      = 0;
+    ctx.output.max_size = *out_len;
+    ctx.output.error    = 0;
+
+    ctx.algorithm = algorithm;
+
+    int result;
+    switch(algorithm)
+    {
+        case HA_ALGORITHM_ASC:
+            result = asc_unpack(&ctx);
+            break;
+        case HA_ALGORITHM_HSC:
+            result = hsc_unpack(&ctx);
+            break;
+        default:
+            return -1;
+    }
+
+    *out_len = ctx.output.size;
+    return result;
+}
+
+AARU_EXPORT int AARU_CALL ha_asc_decompress(const unsigned char *in_buf,
+                                            size_t               in_len,
+                                            unsigned char *      out_buf,
+                                            size_t *             out_len)
+{
+    return ha_algorithm_decompress(HA_ALGORITHM_ASC, in_buf, in_len, out_buf, out_len);
+}
+
+AARU_EXPORT int AARU_CALL ha_hsc_decompress(const unsigned char *in_buf,
+                                            size_t               in_len,
+                                            unsigned char *      out_buf,
+                                            size_t *             out_len)
+{
+    return ha_algorithm_decompress(HA_ALGORITHM_HSC, in_buf, in_len, out_buf, out_len);
+}