man strlen () - get string length

NAME

strlen - get string length

SYNOPSIS

#include <string.h>

size_t strlen(const char *s);

DESCRIPTION

The strlen() function shall compute the number of bytes in the string to which s points, not including the terminating null byte.

RETURN VALUE

The strlen() function shall return the length of s; no return value shall be reserved to indicate an error.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

Getting String Lengths

The following example sets the maximum length of key and data by using strlen() to get the lengths of those strings. 

#include <string.h>
...
struct element {
    char *key;
    char *data;
};
...
char *key, *data;
int len;


*keylength = *datalength = 0;
...
if ((len = strlen(key)) > *keylength)
    *keylength = len;
if ((len = strlen(data)) > *datalength)
    *datalength = len;
...



APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>

COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
http://www.opengroup.org/unix/online.html .