RE: strtok and consecutive delimiters

["Bob cozzi" <cozzi@xxxxxxxxx>]

Yep, and this is the code I use in the RPG ToolKit:

#include <string.h>
#include <stdio.h>

/*
 * Get next token from string *stringp, where tokens are possibly-empty
 * strings separated by characters from delim.  
 *
 * Writes NULs into the string at *stringp to end tokens.
 * delim need not remain constant from call to call.
 * On return, *stringp points past the last NUL written (if there might
 * be further tokens), or is NULL (if there are definitely no more tokens).
 *
 * If *stringp is NULL, strsep returns NULL.
 */
char* strsep(char** stringp, const char* delim)
{
        char *s = NULL;
        const char *spanp;
        int c=0;
      int sc=0;
        char *tok=NULL;

        if ((s = *stringp) == NULL) {
                return (NULL);
        }
        for (tok = s;;) {
                c = *s++;
                spanp = delim;
                do {
                        if ((sc = *spanp++) == c) {
                                if (c == 0) {
                                        s = NULL;
                                } else {
                                        s[-1] = 0;
                                }
                                *stringp = s;
                                return (tok);
                        }
                } while (sc != 0);
        }
}

Bob Cozzi
Cozzi Consulting
www.rpgiv.com


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Hans Boldt
Sent: Thursday, June 12, 2003 10:12 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: strtok and consecutive delimiters

Bob cozzi wrote:
> "Slight modification" probably means he didn't know how to do it.
> (Jon's in Europe so I no he's not listening live, like he usually does,
<g>)
> The is another function called strsep() that does what you want. It too is
a
> C function. The C compiler/runtime does not come with that function on the
> 400. I ported it to the RPG ToolKit about 4 months ago and sent it to Jon
as
> well. 

FWIW, as far as I can tell, the only differences between strtok() 
and strsep() are that the former can't handle empty strings and the 
latter is not ANSI.

Cheers! Hans


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