Function stringcmp

numexpr3/string_functions.hpp:448–472

//////////////////////////////////////////////////////// Original string functions in interpreter.cpp below here:// ////////////////////////////////////////////////////////

// Original string functions in interpreter.cpp below here://
/////////////////////////////////////////////////////////////
int
stringcmp(const char *s1, const char *s2, npy_intp maxlen1, npy_intp maxlen2)
{
    npy_intp maxlen, nextpos;
    // Point to this when the end of a string is found, to simulate infinte 
    // trailing NULL characters. 
    const char null = 0;

    // First check if some of the operands is the empty string and if so,
    // just check that the first char of the other is the NULL one.
    // Fixes #121
    if (maxlen2 == 0) return *s1 != null;
    if (maxlen1 == 0) return *s2 != null;

    maxlen = (maxlen1 > maxlen2) ? maxlen1 : maxlen2;
    for (nextpos = 1;  nextpos <= maxlen;  nextpos++) {
        if (*s1 < *s2)
            return -1;
        if (*s1 > *s2)
            return +1;
        s1 = (nextpos >= maxlen1) ? &null : s1+1;
        s2 = (nextpos >= maxlen2) ? &null : s2+1;
    }
    return 0;
}

int
stringcontains(const char *haystack_start, const char *needle_start,  npy_intp max_haystack_len, npy_intp max_needle_len)