Struct cqdb_sys::tag_cqdb_writer

#[repr(C)]pub struct tag_cqdb_writer { /* fields omitted */ }

CQDB status codes. \addtogroup cqdb_writer CQDB Writer API @{

The CQDB Writer API constructs a CQDB chunk on a seekable stream. The seekable stream must be created by the fopen() function with writable and binary flags ("wb"). The CQDB Writer API can build a CQDB chunk at any position on the stream; one can thus write some data, append a CQDB chunk, and continue writing other data on the stream.

By default, the function cqdb_writer() constructs a database with forward (string to integer identifier) and backward (integer identifier to string) lookups. The data for reverse lookup is omitted with ::CQDB_ONEWAY flag specified.

It is recommended to keep the maximum number of identifiers as smallest as possible because reverse lookup is maintained by a array with the size of sizeof(int) * (maximum number of identifiers + 1). For example, putting a set of integer identifers (0, 1, 1000) creates a reverse lookup array with 1001 elements only to waste the disk space for 998 (= 1001-3) elements in the array.

Trait Implementations

impl Clone for tag_cqdb_writer

pub fn clone(&self) -> tag_cqdb_writer

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for tag_cqdb_writer

impl Debug for tag_cqdb_writer

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.