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oops, casting negative char to size_t is… not nice

This commit is contained in:
tg 2018-01-14 00:09:34 +00:00
parent c763e7b0e9
commit 9e4868fb06
1 changed files with 6 additions and 3 deletions
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9
sh.h
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@ -182,7 +182,7 @@
#endif
#ifdef EXTERN
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.852 2018/01/14 00:03:03 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.853 2018/01/14 00:09:34 tg Exp $");
#endif
#define MKSH_VERSION "R56 2017/10/17"
@ -1474,14 +1474,17 @@ EXTERN char ifs0;
extern unsigned int eek_ord;
#define ORD(c) ((size_t)(c) > 0xFF ? eek_ord : \
((unsigned int)(unsigned char)(c)))
#define ord(c) ({ \
#define Oc(c,t) __builtin_types_compatible_p(__typeof__(c), t)
#define ord(c) __builtin_choose_expr( \
Oc((c), unsigned char) || Oc((c), char), \
((unsigned int)(unsigned char)(c)), ({ \
size_t ord_c = (c); \
\
if (ord_c > 0xFF) \
internal_errorf("%s:%d:ord(%zu)", \
__FILE__, __LINE__, ord_c); \
((unsigned int)(unsigned char)(c)); \
})
}))
#else
#define ord(c) ((unsigned int)(unsigned char)(c))
#define ORD(c) ord(c) /* may evaluate arguments twice */