zip_source_seek_compute_offset
—
validate arguments and compute offset
libzip (-lzip)
#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);
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.
On success, it returns the new offset, on error it returns -1 and sets
error.
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.
zip_source_function(3)
zip_source_seek_compute_offset
() was added in
libzip 1.0.
Dieter Baron
<
dillo@nih.at>
and
Thomas Klausner
<
tk@giga.or.at>