.\" zip_source_filep.mdoc -- create data source from a file stream
.\" Copyright (C) 2004-2019 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP archives.
.\" The authors can be contacted at <libzip@nih.at>
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.Dd December 18, 2017
.Dt ZIP_SOURCE_FILEP 3
.Os
.Sh NAME
.Nm zip_source_filep ,
.Nm zip_source_filep_create
.Nd create data source from FILE *
.Sh LIBRARY
libzip (-lzip)
.Sh SYNOPSIS
.In zip.h
.Ft zip_source_t *
.Fn zip_source_filep "zip_t *archive" "FILE *file" "zip_uint64_t start" "zip_int64_t len"
.Ft zip_source_t *
.Fn zip_source_filep_create "FILE *file" "zip_uint64_t start" "zip_int64_t len" "zip_error_t *error"
.Sh DESCRIPTION
The functions
.Fn zip_source_filep
and
.Fn zip_source_filep_create
create a zip source from a file stream.
They read
.Ar len
bytes from offset
.Ar start
from the open file stream
.Ar file .
If
.Ar len
is 0 or \-1, the whole file (starting from
.Ar start )
is used.
.Pp
If the file stream supports seeking, the source can be used to open
a read-only zip archive from.
.Pp
The file stream is closed when the source is being freed, usually
by
.Xr zip_close 3 .
.Sh RETURN VALUES
Upon successful completion, the created source is returned.
Otherwise,
.Dv NULL
is returned and the error code in
.Ar archive
or
.Ar error
is set to indicate the error.
.Sh ERRORS
.Fn zip_source_filep
fails if:
.Bl -tag -width Er
.It Bq Er ZIP_ER_INVAL
.Ar file ,
.Ar start ,
or
.Ar len
are invalid.
.It Bq Er ZIP_ER_MEMORY
Required memory could not be allocated.
.El
.Sh SEE ALSO
.Xr libzip 3 ,
.Xr zip_file_add 3 ,
.Xr zip_file_replace 3 ,
.Xr zip_source 3
.Sh HISTORY
.Fn zip_source_filep
and
.Fn zip_source_filep_create
were added in libzip 1.0.
.Sh AUTHORS
.An -nosplit
.An Dieter Baron Aq Mt dillo@nih.at
and
.An Thomas Klausner Aq Mt tk@giga.or.at