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.\" ========================================================================
.\"
.IX Title "IO::InnerFile 3pm"
.TH IO::InnerFile 3pm "2005-02-10" "perl v5.12.4" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
IO::InnerFile \- define a file inside another file
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 5
\&    ### Read a subset of a file:
\&    $inner = IO::InnerFile\->new($fh, $start, $length);
\&    while (<$inner>) {
\&        ...
\&    }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
If you have a filehandle that can \fIseek()\fR and \fItell()\fR, then you 
can open an IO::InnerFile on a range of the underlying file.
.SH "PUBLIC INTERFACE"
.IX Header "PUBLIC INTERFACE"
.IP "new \s-1FILEHANDLE\s0, [\s-1START\s0, [\s-1LENGTH\s0]]" 4
.IX Item "new FILEHANDLE, [START, [LENGTH]]"
\&\fIClass method, constructor.\fR
Create a new inner-file opened on the given \s-1FILEHANDLE\s0,
from bytes \s-1START\s0 to \s-1START+LENGTH\s0.  Both \s-1START\s0 and \s-1LENGTH\s0
default to 0; negative values are silently coerced to zero.
.Sp
Note that \s-1FILEHANDLE\s0 must be able to \fIseek()\fR and \fItell()\fR, in addition
to whatever other methods you may desire for reading it.
.IP "set_length \s-1LENGTH\s0" 4
.IX Item "set_length LENGTH"
.PD 0
.IP "get_length" 4
.IX Item "get_length"
.IP "add_length \s-1NBYTES\s0" 4
.IX Item "add_length NBYTES"
.PD
\&\fIInstance methods.\fR
Get/set the virtual length of the inner file.
.IP "set_start \s-1START\s0" 4
.IX Item "set_start START"
.PD 0
.IP "get_start" 4
.IX Item "get_start"
.IP "add_start \s-1NBYTES\s0" 4
.IX Item "add_start NBYTES"
.PD
\&\fIInstance methods.\fR
Get/set the virtual start position of the inner file.
.IP "binmode" 4
.IX Item "binmode"
.PD 0
.IP "close" 4
.IX Item "close"
.IP "flush" 4
.IX Item "flush"
.IP "getc" 4
.IX Item "getc"
.IP "getline" 4
.IX Item "getline"
.IP "print \s-1LIST\s0" 4
.IX Item "print LIST"
.IP "printf \s-1LIST\s0" 4
.IX Item "printf LIST"
.IP "read \s-1BUF\s0, \s-1NBYTES\s0" 4
.IX Item "read BUF, NBYTES"
.IP "readline" 4
.IX Item "readline"
.IP "seek \s-1OFFFSET\s0, \s-1WHENCE\s0" 4
.IX Item "seek OFFFSET, WHENCE"
.IP "tell" 4
.IX Item "tell"
.IP "write \s-1ARGS\s0..." 4
.IX Item "write ARGS..."
.PD
\&\fIInstance methods.\fR
Standard filehandle methods.
.SH "VERSION"
.IX Header "VERSION"
\&\f(CW$Id:\fR InnerFile.pm,v 1.4 2005/02/10 21:21:53 dfs Exp $
.SH "AUTHOR"
.IX Header "AUTHOR"
Original version by Doru Petrescu (pdoru@kappa.ro).
.PP
Documentation and by Eryq (eryq@zeegee.com).
.PP
Currently maintained by David F. Skoll (dfs@roaringpenguin.com).