kernel/lib/libc/string/strtok.c

// Copyright 2016 The Fuchsia Authors
// Copyright (c) 2008 Travis Geiselbrecht
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#include <string.h>
#include <sys/types.h>

static char *___strtok = NULL;

char *
strtok(char *s, char const *ct)
{
    char *sbegin, *send;

    sbegin  = s ? s : ___strtok;
    if (!sbegin) {
        return NULL;
    }
    sbegin += strspn(sbegin,ct);
    if (*sbegin == '\0') {
        ___strtok = NULL;
        return ( NULL );
    }
    send = strpbrk( sbegin, ct);
    if (send && *send != '\0')
        *send++ = '\0';
    ___strtok = send;
    return (sbegin);
}