'\" t
.\"     Title: __bitmap_parse
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: April 2019
.\"    Manual: Basic Kernel Library Functions
.\"    Source: Kernel Hackers Manual 4.9.168
.\"  Language: English
.\"
.TH "__BITMAP_PARSE" "9" "April 2019" "Kernel Hackers Manual 4\&.9\&." "Basic Kernel Library Functions"
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.SH "NAME"
__bitmap_parse \- convert an ASCII hex string into a bitmap\&.
.SH "SYNOPSIS"
.HP \w'int\ __bitmap_parse('u
.BI "int __bitmap_parse(const\ char\ *\ " "buf" ", unsigned\ int\ " "buflen" ", int\ " "is_user" ", unsigned\ long\ *\ " "maskp" ", int\ " "nmaskbits" ");"
.SH "ARGUMENTS"
.PP
\fIbuf\fR
.RS 4
pointer to buffer containing string\&.
.RE
.PP
\fIbuflen\fR
.RS 4
buffer size in bytes\&. If string is smaller than this then it must be terminated with a \e0\&.
.RE
.PP
\fIis_user\fR
.RS 4
location of buffer, 0 indicates kernel space
.RE
.PP
\fImaskp\fR
.RS 4
pointer to bitmap array that will contain result\&.
.RE
.PP
\fInmaskbits\fR
.RS 4
size of bitmap, in bits\&.
.RE
.SH "DESCRIPTION"
.PP
Commas group hex digits into chunks\&. Each chunk defines exactly 32 bits of the resultant bitmask\&. No chunk may specify a value larger than 32 bits (\fB\-EOVERFLOW\fR), and if a chunk specifies a smaller value then leading 0\-bits are prepended\&.
\fB\-EINVAL\fR
is returned for illegal characters and for grouping errors such as
\(lq1,,5\(rq,
\(lq,44\(rq,
\(lq,\(rq
and ""\&. Leading and trailing whitespace accepted, but not embedded whitespace\&.
.SH "COPYRIGHT"
.br