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Change toupper/tolower so that they don't give a bogus answer if the

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argument is already upper/lower.
This commit is contained in:
dfr 1999-09-11 17:54:37 +00:00
parent 4d8d67c8c0
commit c45229cbf6
1 changed files with 10 additions and 2 deletions
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12
lib/libstand/stand.h
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@ -167,8 +167,16 @@ extern struct open_file files[];
#define isxdigit(c) (isdigit(c) || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
#define isascii(c) ((c) >= 0 || (c <= 0x7f))
#define isalpha(c) (isupper(c) || (islower(c)))
#define toupper(c) ((c) - 'a' + 'A')
#define tolower(c) ((c) - 'A' + 'a')
static __inline int toupper(int c)
{
return islower(c) ? c - 'a' + 'A' : c;
}
static __inline int tolower(int c)
{
return isupper(c) ? c - 'A' + 'a' : c;
}
/* sbrk emulation */
extern void setheap(void *base, void *top);