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129 .\" ========================================================================
131 .IX Title "IO::InnerFile 3"
132 .TH IO::InnerFile 3 "2005-02-10" "perl v5.8.7" "User Contributed Perl Documentation"
134 IO::InnerFile \- define a file inside another file
136 .IX Header "SYNOPSIS"
138 \& ### Read a subset of a file:
139 \& $inner = IO::InnerFile\->new($fh, $start, $length);
140 \& while (<$inner>) {
145 .IX Header "DESCRIPTION"
146 If you have a filehandle that can \fIseek()\fR and \fItell()\fR, then you
147 can open an IO::InnerFile on a range of the underlying file.
148 .SH "PUBLIC INTERFACE"
149 .IX Header "PUBLIC INTERFACE"
150 .IP "new \s-1FILEHANDLE\s0, [\s-1START\s0, [\s-1LENGTH\s0]]" 4
151 .IX Item "new FILEHANDLE, [START, [LENGTH]]"
152 \&\fIClass method, constructor.\fR
153 Create a new inner-file opened on the given \s-1FILEHANDLE\s0,
154 from bytes \s-1START\s0 to \s-1START+LENGTH\s0. Both \s-1START\s0 and \s-1LENGTH\s0
155 default to 0; negative values are silently coerced to zero.
157 Note that \s-1FILEHANDLE\s0 must be able to \fIseek()\fR and \fItell()\fR, in addition
158 to whatever other methods you may desire for reading it.
159 .IP "set_length \s-1LENGTH\s0" 4
160 .IX Item "set_length LENGTH"
163 .IX Item "get_length"
164 .IP "add_length \s-1NBYTES\s0" 4
165 .IX Item "add_length NBYTES"
167 \&\fIInstance methods.\fR
168 Get/set the virtual length of the inner file.
169 .IP "set_start \s-1START\s0" 4
170 .IX Item "set_start START"
174 .IP "add_start \s-1NBYTES\s0" 4
175 .IX Item "add_start NBYTES"
177 \&\fIInstance methods.\fR
178 Get/set the virtual start position of the inner file.
190 .IP "print \s-1LIST\s0" 4
191 .IX Item "print LIST"
192 .IP "printf \s-1LIST\s0" 4
193 .IX Item "printf LIST"
194 .IP "read \s-1BUF\s0, \s-1NBYTES\s0" 4
195 .IX Item "read BUF, NBYTES"
198 .IP "seek \s-1OFFFSET\s0, \s-1WHENCE\s0" 4
199 .IX Item "seek OFFFSET, WHENCE"
202 .IP "write \s-1ARGS\s0..." 4
203 .IX Item "write ARGS..."
205 \&\fIInstance methods.\fR
206 Standard filehandle methods.
209 $Id: InnerFile.pm,v 1.4 2005/02/10 21:21:53 dfs Exp $
212 Original version by Doru Petrescu (pdoru@kappa.ro).
214 Documentation and by Eryq (eryq@zeegee.com).
216 Currently maintained by David F. Skoll (dfs@roaringpenguin.com).