/* This program uses code from "Algorithms in C, Third Edition,"
 *               by Robert Sedgewick, Addison-Wesley, 1998.
 */

#ifndef BASIC_STRINGS_H
#define BASIC_STRINGS_H

/* return the length of string s, i.e., the number of 
 * characters up to and not including the first occurrence of 
 * the NULL character. */
int strlen1(char * s);


/* copy the contents of source to the target string. */
void strcpy1(char * target, char * source);

/* ASCII-based comparison of the two strings. 
 * Return values:
 * 0, if the two srings have the same contents.
 * less than 0, if the ASCII code of s1 is less than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 * greater than 0, if the ASCII code of s1 is greater than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 */
int strcmp1_unoptimized(char * s1, char * s2);

/* ASCII-based comparison of the two strings. 
 * Return values:
 * 0, if the two srings have the same contents.
 * less than 0, if the ASCII code of s1 is less than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 * greater than 0, if the ASCII code of s1 is greater than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 */
int strcmp1(char * s1, char * s2);


/* ASCII-based comparison of the first N letters of two strings. 
 * Return values:
 * 0, if the two srings have the same contents.
 * less than 0, if the ASCII code of s1 is less than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 * greater than 0, if the ASCII code of s1 is greater than the ASCII code
 *     of s2 at the first position where s1 and s2 differ.
 */
int strncmp1(char * s1, char * s2, int N);

char * strcat1(char * a, char * b);


#endif // BASIC_STRINGS_H