Prevent sign extension on characters with 8bit set

svn path=/head/; revision=95071
2002-04-19 19:43:46 +00:00 · 2002-04-19 19:43:46 +00:00 · 81153b6b63 · 2020-12-20 02:59:44 +00:00
commit 81153b6b63
parent c7e56d3248
1 changed files with 1 additions and 1 deletions
--- a/usr.bin/m4/mdef.h
+++ b/usr.bin/m4/mdef.h
@ -170,7 +170,7 @@ struct input_file {
 *      pushf() - push a call frame entry onto stack
 *      pushs() - push a string pointer onto stack
 */
-#define gpbc()   (bp > bufbase) ? (*--bp ? *bp : EOF) : \
+#define gpbc()   (bp > bufbase) ? (*--bp ? (*bp & 0xFF) : EOF) : \
 	((chscratch = obtain_char(infile+ilevel)) == '\n' && \
 	++inlineno[ilevel], chscratch)
 #define pushf(x) 			\