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changeset 17194:aada14bf74ed

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randmtzig.c: prevent left-shift of a 1 into sign bit in oct_init_by_entropy(). * randmtzig.c: in expression "word[0] + ... + (word[3]<<24)", cast the latter to uint32_t before shifting, preventing (C99) undefined behavior.
author Philipp Kutin <philipp.kutin@gmail.com>
date Wed, 07 Aug 2013 12:54:30 +0200
parents af2051e363ea
children 2899d110c178
files liboctave/numeric/randmtzig.c
diffstat 1 files changed, 1 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/liboctave/numeric/randmtzig.c
+++ b/liboctave/numeric/randmtzig.c
@@ -268,7 +268,7 @@
             unsigned char word[4];
             if (fread (word, 4, 1, urandom) != 1)
               break;
-            entropy[n++] = word[0]+(word[1]<<8)+(word[2]<<16)+(word[3]<<24);
+            entropy[n++] = word[0]+(word[1]<<8)+(word[2]<<16)+((uint32_t)word[3]<<24);
           }
         fclose (urandom);
       }