ZIP_SOURCE_SEEK_COMPUTE_OFFSET(3)                     Library Functions Manual

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>

Linux 6.7.4-arch1-1            December 18, 2017           Linux 6.7.4-arch1-1