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81 lines
1.9 KiB
Plaintext
81 lines
1.9 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "STRLEN" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" strlen
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.SH NAME
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strlen \- get string length
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.SH SYNOPSIS
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.LP
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\fB#include <string.h>
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.br
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.sp
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size_t strlen(const char *\fP\fIs\fP\fB);
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIstrlen\fP() function shall compute the number of bytes in the
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string to which \fIs\fP points, not including the
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terminating null byte.
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.SH RETURN VALUE
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.LP
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The \fIstrlen\fP() function shall return the length of \fIs\fP; no
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return value shall be reserved to indicate an error.
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.SH ERRORS
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.LP
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No errors are defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.SS Getting String Lengths
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.LP
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The following example sets the maximum length of \fIkey\fP and \fIdata\fP
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by using \fIstrlen\fP() to get the lengths of those
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strings.
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.sp
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.RS
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.nf
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\fB#include <string.h>
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\&...
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struct element {
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char *key;
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char *data;
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};
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\&...
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char *key, *data;
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int len;
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.sp
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*keylength = *datalength = 0;
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\&...
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if ((len = strlen(key)) > *keylength)
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*keylength = len;
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if ((len = strlen(data)) > *datalength)
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*datalength = len;
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\&...
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\fP
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.fi
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.RE
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.SH APPLICATION USAGE
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.LP
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None.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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The Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<string.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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