NAME

       zip_source_seek_compute_offset - validate arguments and compute offset

LIBRARY

       libzip (-lzip)

SYNOPSIS

       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)

AUTHORS

       Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>