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#include <ctype.h>
#include "limits.h"
#include "nonstd/assert.h"
#include "nonstd/internal.h"
/** convert a lowercase letter to uppercase **/
int toupper(int c)
{
unsigned char *map = __libc(TOUPPER);
ASSERT_REPRESENTABLE(c, 0, UCHAR_MAX, unsigned char, EOF);
/*
RETURN_SUCCESS(ARGUMENT(c) converted to uppercase);
RETURN_FAILURE(ARGUMENT(c), ARGUMENT(c) was not a lowercase letter or it has no equivalent upercase letter);
*/
return map[c];
}
/***
converts a lowercase letter to its equivalent uppercase letter in the current
locale.
***/
/*
LC_CTYPE
STDC(1)
*/
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