1 files changed, 69 insertions, 0 deletions
diff --git a/crypto/comp/c_rle.c b/crypto/comp/c_rle.c
new file mode 100644
index 0000000000..b8b9b3e1bc
--- /dev/null
+++ b/crypto/comp/c_rle.c
@@ -0,0 +1,69 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "objects.h"
+#include "comp.h"
+
+static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
+	unsigned int olen, unsigned char *in, unsigned int ilen);
+static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
+	unsigned int olen, unsigned char *in, unsigned int ilen);
+
+static COMP_METHOD rle_method={
+	NID_rle_compression,
+	LN_rle_compression,
+	NULL,
+	NULL,
+	rle_compress_block,
+	rle_expand_block,
+	NULL,
+	};
+
+COMP_METHOD *COMP_rle()
+	{
+	return(&rle_method);
+	}
+
+static int rle_compress_block(ctx,out,olen,in,ilen)
+COMP_CTX *ctx;
+unsigned char *out;
+unsigned int olen;
+unsigned char *in;
+unsigned int ilen;
+	{
+	/* int i; */
+
+	if (olen < (ilen+1))
+		{
+		/* ZZZZZZZZZZZZZZZZZZZZZZ */
+		return(-1);
+		}
+
+	*(out++)=0;
+	memcpy(out,in,ilen);
+	return(ilen+1);
+	}
+
+static int rle_expand_block(ctx,out,olen,in,ilen)
+COMP_CTX *ctx;
+unsigned char *out;
+unsigned int olen;
+unsigned char *in;
+unsigned int ilen;
+	{
+	int i;
+
+	if (olen < (ilen-1))
+		{
+		/* ZZZZZZZZZZZZZZZZZZZZZZ */
+		return(-1);
+		}
+
+	i= *(in++);
+	if (i == 0)
+		{
+		memcpy(out,in,ilen-1);
+		}
+	return(ilen-1);
+	}
+