.TH "avr_string" 3avr "Fri Nov 24 2023 23:59:10" "Version 2.0.0" "avr-libc" \" -*- nroff -*-
.ad l
.nh
.SH NAME
avr_string \- <string\&.h>: Strings
.SH SYNOPSIS
.br
.PP
.SS "Macros"

.in +1c
.ti -1c
.RI "#define \fB_FFS\fP(x)"
.br
.in -1c
.SH "Detailed Description"
.PP 

.PP
.nf
#include <string\&.h> 

.fi
.PP
.PP
The string functions perform string operations on NULL terminated strings\&.
.PP
\fBNote\fP
.RS 4
If the strings you are working on resident in program space (flash), you will need to use the string functions described in \fB<avr/pgmspace\&.h>: Program Space Utilities\fP\&. 
.RE
.PP

.SH "Macro Definition Documentation"
.PP 
.SS "#define _FFS(x)"
This macro finds the first (least significant) bit set in the input value\&.
.PP
This macro is very similar to the function ffs() except that it evaluates its argument at compile-time, so it should only be applied to compile-time constant expressions where it will reduce to a constant itself\&. Application of this macro to expressions that are not constant at compile-time is not recommended, and might result in a huge amount of code generated\&.
.PP
\fBReturns\fP
.RS 4
The \fB_FFS()\fP macro returns the position of the first (least significant) bit set in the word val, or 0 if no bits are set\&. The least significant bit is position 1\&. Only 16 bits of argument are evaluted\&. 
.RE
.PP

.SH "Author"
.PP 
Generated automatically by Doxygen for avr-libc from the source code\&.