struct UDataInfo

UDataInfo contains the properties about the requested data.

This is meta data.

This structure may grow in the future, indicated by the

size

field.

ICU data must be at least 8-aligned, and should be 16-aligned.

The UDataInfo struct begins 4 bytes after the start of the data item,

so it is 4-aligned.

The platform data property fields help determine if a data

file can be efficiently used on a given machine.

The particular fields are of importance only if the data

is affected by the properties - if there is integer data

with word sizes > 1 byte, char* text, or UChar* text.

The implementation for the

udata_open[Choice]()

functions may reject data based on the value in

isBigEndian

.

No other field is used by the

udata

API implementation.

The

dataFormat

may be used to identify

the kind of data, e.g. a converter table.

The

formatVersion

field should be used to

make sure that the format can be interpreted.

It may be a good idea to check only for the one or two highest

of the version elements to allow the data memory to

get more or somewhat rearranged contents, for as long

as the using code can still interpret the older contents.

The

dataVersion

field is intended to be a

common place to store the source version of the data;

for data from the Unicode character database, this could

reflect the Unicode version.

ICU 2.0