Momentum-Apps/nrf24mousejacker/stdstring.c

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <string.h>

char* nrf_strcat(char* s, const char* append) {
    char* save = s;
    for(; *s; ++s)
        ;
    while((*s++ = *append++) != '\0')
        ;
    return (save);
}
static char* nrfstrtok_r(char* s, const char* delim, char** last) {
    char* spanp;
    int c, sc;
    char* tok;
    if(s == NULL && (s = *last) == NULL) return (NULL);
    /*
	 * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
	 */
cont:
    c = *s++;
    for(spanp = (char*)delim; (sc = *spanp++) != 0;) {
        if(c == sc) goto cont;
    }
    if(c == 0) { /* no non-delimiter characters */
        *last = NULL;
        return (NULL);
    }
    tok = s - 1;
    /*
	 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
	 * Note that delim must have one NUL; we stop if we see that, too.
	 */
    for(;;) {
        c = *s++;
        spanp = (char*)delim;
        do {
            if((sc = *spanp++) == c) {
                if(c == 0)
                    s = NULL;
                else
                    s[-1] = 0;
                *last = s;
                return (tok);
            }
        } while(sc != 0);
    }
    /* NOTREACHED */
}
char* nrf_strtok(char* s, const char* delim) {
    static char* last;
    return nrfstrtok_r(s, delim, &last);
}