strsep()

Separate a string into pieces marked by given delimiters

Synopsis:

#include <string.h>

char *strsep( char **stringp,
              char *delim );

Arguments:

stringp: The address of a pointer to the string that you want to break into pieces; see below.
delim: A set of characters that delimit the pieces in the string.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The strsep() function looks in the null-terminated string pointed to by stringp for the first occurrence of any character in delim and replaces this with a \0, records the location of the next character in *stringp, then returns the original value of *stringp. If no delimiter characters are found, strsep() sets *stringp to NULL; if *stringp is initially NULL, strsep() returns NULL.

Returns:

A pointer to the original value of *stringp.

Examples:

Parse strings containing runs of whitespace, making up an argument vector:

char inputstring[100];
char **argv[51], **ap = argv, *p, *val;

/* set up inputstring */
for (p = inputstring; p != NULL; ) {
    while ((val = strsep(&p, " \t")) != NULL && *val == '\0');
    *ap++ = val;
}
*ap = 0;

Classification:

Unix

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes