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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 .