crypto/md5-buffer: Use 'restrict'.

* lib/md5.h (__md5_finish_ctx, __md5_read_ctx, __md5_buffer): Use
'restrict'.
* modules/crypto/md5-buffer (configure.ac): Require AC_C_RESTRICT.

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/md5.h b/lib/md5.h
index 9e0c0fb3fc..0c8b929745 100644
--- a/lib/md5.h
+++ b/lib/md5.h
@@ -105,13 +105,15 @@ extern void __md5_process_bytes (const void *buffer, size_t len,
    in first 16 bytes following RESBUF.  The result is always in little
    endian byte order, so that a byte-wise output yields to the wanted
    ASCII representation of the message digest.  */
-extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;
+extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *restrict resbuf)
+     __THROW;
 
 
 /* Put result from CTX in first 16 bytes following RESBUF.  The result is
    always in little endian byte order, so that a byte-wise output yields
    to the wanted ASCII representation of the message digest.  */
-extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
+extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *restrict resbuf)
+     __THROW;
 
 
 /* Compute MD5 message digest for LEN bytes beginning at BUFFER.  The
@@ -119,7 +121,7 @@ extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
    output yields to the wanted ASCII representation of the message
    digest.  */
 extern void *__md5_buffer (const char *buffer, size_t len,
-                           void *resblock) __THROW;
+                           void *restrict resblock) __THROW;
 
 # endif
 /* Compute MD5 message digest for bytes read from STREAM.