1 files changed, 61 insertions, 0 deletions
diff --git a/openssl/crypto/comp/c_rle.c b/openssl/crypto/comp/c_rle.c
new file mode 100644
index 00000000..18bceae5
--- /dev/null
+++ b/openssl/crypto/comp/c_rle.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/objects.h>
+#include <openssl/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,
+	NULL,
+	};
+
+COMP_METHOD *COMP_rle(void)
+	{
+	return(&rle_method);
+	}
+
+static int rle_compress_block(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(COMP_CTX *ctx, unsigned char *out,
+	     unsigned int olen, unsigned char *in, unsigned int ilen)
+	{
+	int i;
+
+	if (ilen == 0 || olen < (ilen-1))
+		{
+		/* ZZZZZZZZZZZZZZZZZZZZZZ */
+		return(-1);
+		}
+
+	i= *(in++);
+	if (i == 0)
+		{
+		memcpy(out,in,ilen-1);
+		}
+	return(ilen-1);
+	}