svcomp_openbsd_cstrcspn_alloca.c

contents

/*
 * Date: 17.12.2013
 * Author: Thomas Ströder
 */
#include <stdlib.h>

extern int __VERIFIER_nondet_int(void);

/*
 * Span the complement of string s2.
 */
size_t
cstrcspn(const char *s1, const char *s2)
{
	const char *p, *spanp;
	char c, sc;

	/*
	 * Stop as soon as we find any character from s2.  Note that there
	 * must be a NUL in s2; it suffices to stop when we find that, too.
	 */
	for (p = s1;;) {
		c = *p++;
		spanp = s2;
		do {
			if ((sc = *spanp++) == c)
				return (p - 1 - s1);
		} while (sc != 0);
	}
	/* NOTREACHED */
}

int main() {
    int length1 = __VERIFIER_nondet_int();
    int length2 = __VERIFIER_nondet_int();
    if (length1 < 1) {
        length1 = 1;
    }
    if (length2 < 1) {
        length2 = 1;
    }
    char* nondetString1 = (char*) alloca(length1 * sizeof(char));
    char* nondetString2 = (char*) alloca(length2 * sizeof(char));
    nondetString1[length1-1] = '\0';
    nondetString2[length2-1] = '\0';
    return cstrcspn(nondetString1,nondetString2);
}

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