| .TH "ZIP_SOURCE_SEEK_COMPUTE_OFFSET" "3" "December 18, 2017" "NiH" "Library Functions Manual" |
| .nh |
| .if n .ad l |
| .SH "NAME" |
| \fBzip_source_seek_compute_offset\fR |
| \- validate arguments and compute offset |
| .SH "LIBRARY" |
| libzip (-lzip) |
| .SH "SYNOPSIS" |
| \fB#include <zip.h>\fR |
| .sp |
| \fIzip_int64_t\fR |
| .br |
| .PD 0 |
| .HP 4n |
| \fBzip_source_seek_compute_offset\fR(\fIzip_uint64_t\ offset\fR, \fIzip_uint64_t\ length\fR, \fIvoid\ *data\fR, \fIzip_uint64_t\ data_length\fR, \fIzip_error_t\ *error\fR); |
| .PD |
| .SH "DESCRIPTION" |
| Use this function to compute the offset for a |
| \fRZIP_SOURCE_SEEK\fR |
| or |
| \fRZIP_SOURCE_SEEK_WRITE\fR |
| command. |
| \fIdata\fR |
| and |
| \fIdata_length\fR |
| are the arguments to the source callback, |
| \fIoffset\fR |
| is the current offset and |
| \fIlength\fR |
| is the length of the source data or, for |
| \fRZIP_SOURCE_SEEK_WRITE\fR, |
| the amount of data written. |
| .SH "RETURN VALUES" |
| On success, it returns the new offset, on error it returns \-1 and |
| sets |
| \fIerror\fR. |
| .SH "ERRORS" |
| \fBzip_source_seek_compute_offset\fR() |
| fails if: |
| .TP 19n |
| [\fRZIP_ER_INVAL\fR] |
| One of the arguments is invalid or the seek would place the offset |
| outside the data. |
| .SH "SEE ALSO" |
| zip_source_function(3) |
| .SH "HISTORY" |
| \fBzip_source_seek_compute_offset\fR() |
| was added in libzip 1.0. |
| .SH "AUTHORS" |
| Dieter Baron <\fIdillo@nih.at\fR> |
| and |
| Thomas Klausner <\fItk@giga.or.at\fR> |