Get a reference to the character buffer of a text object.
char *gettxtbuf(XPRMctx ctx, void *sysctx, void *t);
Mosel's execution context
Context of mmsystem
Reference to a text object
A reference to the character buffer.
The buffer returned is terminated by the character 0 (like a C string)
and can be modified as long as the size is not changed. If the length
of the buffer has to be altered, use the function txtresize
Since the memory management of the module may move text buffers when
allocating memory, the pointer returned by this function is only valid
until the next memory allocation.
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