Function firstIsParentOrSameDirOfSecond

freebsd/contrib/zstd/programs/util.c:866–874

}

static int
firstIsParentOrSameDirOfSecond(const char* firstDir, const char* secondDir)
{
    size_t firstDirLen  = strlen(firstDir),
           secondDirLen = strlen(secondDir);
    return firstDirLen <= secondDirLen &&
           (secondDir[firstDirLen] == PATH_SEP || secondDir[firstDirLen] == '\0') &&
           0 == strncmp(firstDir, secondDir, firstDirLen);
}

static int compareDir(const void* pathname1, const void* pathname2) {
    /* sort it after remove the leading '/'  or './'*/