digests, copy-file: increase the IO buffer size from 4KiB to 32KiB

[gnulib.git] / lib / md5.c

diff --git a/lib/md5.c b/lib/md5.c
index 2213dc1..85c3553 100644 (file)
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -56,7 +56,7 @@
 # define SWAP(n) (n)
 #endif
 
-#define BLOCKSIZE 4096
+#define BLOCKSIZE 32768
 #if BLOCKSIZE % 64 != 0
 # error "invalid BLOCKSIZE"
 #endif
@@ -136,9 +136,12 @@ int
 md5_stream (FILE *stream, void *resblock)
 {
   struct md5_ctx ctx;
-  char buffer[BLOCKSIZE + 72];
   size_t sum;
 
+  char *buffer = malloc (BLOCKSIZE + 72);
+  if (!buffer)
+    return 1;
+
   /* Initialize the computation context.  */
   md5_init_ctx (&ctx);
 
@@ -167,7 +170,10 @@ md5_stream (FILE *stream, void *resblock)
                 exit the loop after a partial read due to e.g., EAGAIN
                 or EWOULDBLOCK.  */
              if (ferror (stream))
-               return 1;
+               {
+                 free (buffer);
+                 return 1;
+               }
              goto process_partial_block;
            }
 
@@ -192,6 +198,7 @@ process_partial_block:
 
   /* Construct result in desired memory.  */
   md5_finish_ctx (&ctx, resblock);
+  free (buffer);
   return 0;
 }