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
  <
tk@giga.or.at>