[unix-history] / usr / src / games / monop / strcmp.c

# include	<stdio.h>
# include	<ctype.h>

# define	reg	register

# define	makelower(c)	(isupper(c) ? tolower(c) : c)

/*
 * Compare strings:  s1>s2: >0  s1==s2: 0  s1<s2: <0
 */

strcmp(s1, s2)
reg char	*s1, *s2; {

	while (makelower(*s1) == makelower(*s2)) {
		if (*s1 == '\0')
			return 0;
		s1++, s2++;
	}
	return *s1 - *s2;
}
Commit	Line	Data
5244a77d C	1	# include <stdio.h>
	2	# include <ctype.h>
	3
	4	# define reg register
	5
	6	# define makelower(c) (isupper(c) ? tolower(c) : c)
	7
	8	/*
	9	* Compare strings: s1>s2: >0 s1==s2: 0 s1<s2: <0
	10	*/
	11
	12	strcmp(s1, s2)
	13	reg char s1, s2; {
	14
	15	while (makelower(s1) == makelower(s2)) {
	16	if (*s1 == '\0')
	17	return 0;
	18	s1++, s2++;
	19	}
	20	return s1 - s2;
	21	}