Fnum(), Fnum32() - return count of all occurrences in buffer
Fnum() returns the number of fields contained in the specified buffer. fbfr is a pointer to a fielded buffer. The FLD_FML32 and FLD_VIEW32 fields are each counted as a single field, regardless of the number of fields they contain.
Fnum32() is used with 32-bit FML.
A thread in a multithreaded application may issue a call to Fnum() or Fnum32() while running in any context state, including TPINVALIDCONTEXT.
This function returns -1 on error and sets Ferror to indicate the error condition.
Under the following conditions, Fnum() fails and sets Ferror to:
The buffer does not begin on the proper boundary.
The buffer is not a fielded buffer or has not been initialized by Finit().
Introduction to FML Functions, Foccur, Foccur32(3fml), Fpres, Fpres32(3fml)
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