Speed up LZ77 match copying

[wimlib] / src / lzms-decompress.c

diff --git a/src/lzms-decompress.c b/src/lzms-decompress.c
index 1ddc3f19dfdce40e9b0bc8e8833505654fd95595..532dfb59c9393f3b486c4c3661e07af283e6c951 100644 (file)
--- a/src/lzms-decompress.c
+++ b/src/lzms-decompress.c
@@ -664,7 +664,6 @@ static int
 lzms_copy_lz_match(struct lzms_decompressor *ctx, u32 length, u32 offset)
 {
        u8 *out_next;
-       u8 *matchptr;
 
        if (length > ctx->out_end - ctx->out_next) {
                LZMS_DEBUG("Match overrun!");
@@ -676,11 +675,10 @@ lzms_copy_lz_match(struct lzms_decompressor *ctx, u32 length, u32 offset)
        }
 
        out_next = ctx->out_next;
-       matchptr = out_next - offset;
-       while (length--)
-               *out_next++ = *matchptr++;
 
-       ctx->out_next = out_next;
+       lz_copy(out_next, length, offset, ctx->out_end);
+       ctx->out_next = out_next + length;
+
        return 0;
 }