@param p Pointer to input data block.
@param type One of the BCF_BT_INT* type codes
@paramout q Location to store an updated value for p
@return The integer value, or zero if @p type is not valid.
If @p type is not one of BCF_BT_INT8, BCF_BT_INT16, BCF_BT_INT32 or
BCF_BT_INT64, zero will be returned and @p *q will not be updated.
Otherwise, the integer value will be returned and @p *q will be set
to the memory location immediately following the integer value.
Cautious callers can detect invalid type codes by checking that *q has
actually been updated.
@param p Pointer to input data block. @param type One of the BCF_BT_INT* type codes @paramout q Location to store an updated value for p @return The integer value, or zero if @p type is not valid.
If @p type is not one of BCF_BT_INT8, BCF_BT_INT16, BCF_BT_INT32 or BCF_BT_INT64, zero will be returned and @p *q will not be updated. Otherwise, the integer value will be returned and @p *q will be set to the memory location immediately following the integer value.
Cautious callers can detect invalid type codes by checking that *q has actually been updated.