newlib-cygwin/newlib/libc/string/strupr.c

41 lines
580 B
C

/*
FUNCTION
<<strupr>>---force string to uppercase
INDEX
strupr
SYNOPSIS
#include <string.h>
char *strupr(char *<[a]>);
DESCRIPTION
<<strupr>> converts each character in the string at <[a]> to
uppercase.
RETURNS
<<strupr>> returns its argument, <[a]>.
PORTABILITY
<<strupr>> is not widely portable.
<<strupr>> requires no supporting OS subroutines.
QUICKREF
strupr
*/
#include <string.h>
#include <ctype.h>
char *
strupr (char *s)
{
unsigned char *ucs = (unsigned char *) s;
for ( ; *ucs != '\0'; ucs++)
{
*ucs = toupper(*ucs);
}
return s;
}