On 2016-08-20 23:11, Richard Gaskin wrote:
In all cases, the data is read and written in binary mode.
If neither "number of bytes of" or "number of chars" will help, how
can I know the true byte length of a chunk of data?
The true byte length of a chunk of data is 'the number of bytes of' so
I'm not entirely clear on what you are asking for.
If you are existing data from a file, and finding where it is then
surely you know:
1) its offset
2) its length (in bytes)
If you didn't know either you wouldn't be able to load it and use it
(after decoding it).
A value only gets a 'byte length' when it is actually encoded as binary
data. For example, the length of a string encoded as UTF8 can be
determined by using:
the number of bytes in textEncode(tString, "utf8")
However, an encoding of a string on disk might include a prefix
describing the size of the string, and might or might not include a
trailing NUL byte.
Warmest Regards,
Mark.
--
Mark Waddingham ~ [email protected] ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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