ZIP_SOURCE_SEEK_COMPUTE_OFFSET(3) Introduction to Library Functions

NAME

zip_source_seek_compute_offset - validate arguments and compute offset

LIBRARY

libzip (-lzip)

SYNOPSIS

#include <zip.h>

zip_int64_t
zip_source_seek_compute_offset(zip_uint64_t offset,
zip_uint64_t length, void *data, zip_uint64_t data_length,
zip_error_t *error);

DESCRIPTION

Use this function to compute the offset for a ZIP_SOURCE_SEEK or
ZIP_SOURCE_SEEK_WRITE command. data and data_length are the arguments
to the source callback, offset is the current offset and length is the
length of the source data or, for ZIP_SOURCE_SEEK_WRITE, the amount of
data written.

RETURN VALUES

On success, it returns the new offset, on error it returns -1 and sets
error.

ERRORS

zip_source_seek_compute_offset() fails if:

[ZIP_ER_INVAL] One of the arguments is invalid or the seek would
place the offset outside the data.

SEE ALSO

zip_source_function(3)

HISTORY

zip_source_seek_compute_offset() was added in libzip 1.0.

AUTHORS

Dieter Baron <dillo@nih.at> and Thomas Klausner <wiz@gatalith.at>

illumos December 18, 2017 illumos