/* strtok_r.c - file for string *//* Copyright 1992-1995 Wind River Systems, Inc. *//*modification history--------------------01d,23oct95,jdi  doc: added comment that input string will be		    changed (SPR 4874).01c,25feb93,jdi  documentation cleanup for 5.1.01b,20sep92,smb  documentation additions01a,08jul92,smb  written and documented.*//*DESCRIPTIONINCLUDE FILES: string.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "string.h"/******************************************************************************* strtok_r - break down a string into tokens (reentrant) (POSIX)** This routine considers the null-terminated string <string> as a sequence* of zero or more text tokens separated by spans of one or more characters* from the separator string <separators>.  The argument <ppLast> points to a* user-provided pointer which in turn points to the position within <string>* at which scanning should begin.** In the first call to this routine, <string> points to a null-terminated* string; <separators> points to a null-terminated string of separator* characters; and <ppLast> points to a NULL pointer.  The function returns a* pointer to the first character of the first token, writes a null character* into <string> immediately following the returned token, and updates the* pointer to which <ppLast> points so that it points to the first character* following the null written into <string>.  (Note that because the* separator character is overwritten by a null character, the input string* is modified as a result of this call.)** In subsequent calls <string> must be a NULL pointer and <ppLast> must* be unchanged so that subsequent calls will move through the string <string>,* returning successive tokens until no tokens remain.  The separator* string <separators> may be different from call to call.  When no token* remains in <string>, a NULL pointer is returned.** INCLUDE FILES: string.h* * RETURNS* A pointer to the first character of a token,* or a NULL pointer if there is no token.** SEE ALSO: strtok()*/char * strtok_r    (    char *       string,	/* string to break into tokens */    const char * separators,	/* the separators */    char **      ppLast		/* pointer to serve as string index */    )    {    if ((string == NULL) && ((string = *ppLast) == NULL))	return (NULL);    if (*(string += strspn (string, separators)) == EOS)	return (*ppLast = NULL);    if ((*ppLast = strpbrk (string, separators)) != NULL)	*(*ppLast)++ = EOS;    return (string);    }