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/*++
/* NAME
/* mystrtok 3
/* SUMMARY
/* safe tokenizer
/* SYNOPSIS
/* #include <stringops.h>
/*
/* char *mystrtok(bufp, delimiters)
/* char **bufp;
/* const char *delimiters;
/* DESCRIPTION
/* mystrtok() splits a buffer on the specified \fIdelimiters\fR.
/* Tokens are delimited by runs of delimiters, so this routine
/* cannot return zero-length tokens.
/*
/* The \fIbufp\fR argument specifies the start of the search; it
/* is updated with each call. The input is destroyed.
/*
/* The result value is the next token, or a null pointer when the
/* end of the buffer was reached.
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include "sys_defs.h"
#include <string.h>
/* Utility library. */
#include "stringops.h"
/* mystrtok - safe tokenizer */
char *mystrtok(char **src, const char *sep)
{
char *start = *src;
char *end;
/*
* Skip over leading delimiters.
*/
start += strspn(start, sep);
if (*start == 0) {
*src = start;
return (0);
}
/*
* Separate off one token.
*/
end = start + strcspn(start, sep);
if (*end != 0)
*end++ = 0;
*src = end;
return (start);
}
#ifdef TEST
/*
* Test program: read lines from stdin, split on whitespace.
*/
#include "vstring.h"
#include "vstream.h"
#include "vstring_vstream.h"
int main(void)
{
VSTRING *vp = vstring_alloc(100);
char *start;
char *str;
while (vstring_fgets(vp, VSTREAM_IN)) {
start = vstring_str(vp);
while ((str = mystrtok(&start, " \t\r\n")) != 0)
vstream_printf(">%s<\n", str);
vstream_fflush(VSTREAM_OUT);
}
vstring_free(vp);
}
#endif
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