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Re: fun (not so much) with funopen
In article <20120316223532.GA2639%britannica.bec.de@localhost>,
Joerg Sonnenberger <joerg%britannica.bec.de@localhost> wrote:
>On Sat, Mar 17, 2012 at 02:14:22AM +0900, Takehiko NOZAKI wrote:
>> POSIX2008 require open_w?memstream(3), but our stdio doesn't have
>> chance to override FILE fflush handle.
>> so it is hard to implement it. (and our fmemopen(3) implementation
>> have bug related about this).
>I don't see how this relates. The only requirement form POSIX seems to
>be that the write handler for open_w?memstream has update the buffer
>pointer to the highest position used. It doesn't specify anything else
>regarding to internal buffering.
I think he means in fmemopen:
When a stream that has been opened for writing is flushed (fflush(3))
or closed (fclose(3)), a null byte is written at the end of the
buffer if there is space. The caller should ensure that an extra
byte is available in the buffer (and that size counts that byte)
to allow for this.
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