1 files changed, 50 insertions, 0 deletions
diff --git a/cfe/cfe/lzma/dcapi.c b/cfe/cfe/lzma/dcapi.c
new file mode 100755
index 0000000..b8f59b0
--- /dev/null
+++ b/cfe/cfe/lzma/dcapi.c
@@ -0,0 +1,50 @@
+#include "LzmaDecode.h"
+#include "bcm63xx_util.h"
+#include "lib_malloc.h"
+
+#define LZMA_ORIGSIZE_SIZE 8
+
+int decompressLZMA(unsigned char *in, unsigned insize, unsigned char *out, unsigned outsize);
+
+// Call ANSI C LZMA decoder to decompress a LZMA block
+int decompressLZMA(unsigned char *in, unsigned insize, unsigned char *out, unsigned outsize)
+{
+
+    SizeT inProcessed, outProcessed;
+    unsigned origsize;
+    int ret;
+    CLzmaDecoderState state;
+
+    ret = LzmaDecodeProperties(&state.Properties, in, LZMA_PROPERTIES_SIZE);
+    if (ret != LZMA_RESULT_OK) {
+        return ret;
+    }
+    in += LZMA_PROPERTIES_SIZE;
+    
+    state.Probs = (CProb *)KMALLOC(LzmaGetNumProbs(&state.Properties) * sizeof(CProb), 0);
+    if (!state.Probs) {
+        return 1001;
+    }
+
+    if (in[4]==0 && in[5]==0 && in[6]==0 && in[7]==0) { // uncompressed size < 4GB (should be)
+        origsize = in[0] | (in[1] << 8) | (in[2] << 16) | (in[3] << 24);
+        in += LZMA_ORIGSIZE_SIZE;
+        if (origsize <= outsize) {
+              ret = LzmaDecode(&state, in, insize, &inProcessed, out, origsize, &outProcessed);
+        }
+        else {
+            // output buffer too small
+            ret = 1000;
+        }
+    }
+    else { // uncompressed size > 4GB, old lzma format or corrupted image, assume old format here
+        printf("LZMA: Prossible old LZMA format, trying to decompress..\n");
+        LzmaDecode(&state, in, insize, &inProcessed, out, outsize, &outProcessed);
+        ret = 0; // It would return an error code as the output buffer size doesn't match. We need to ignore the code.
+    }
+
+    KFREE(state.Probs);
+    
+    return ret;
+}
+