typedef void (*PK_FFREAD_f_t)(const int *guise, const int *strid,
const int *nmax,
char buffer[], int *nactual, int *ifail);
Read from file
Receives:
int *guise --- class of file:
--- FFCROL,FFCSNP,FFCJNL,
--- FFCXMT,FFCXMO,FFCSCH,FFCLNC
int *strid --- frustrum strid
int *nmax --- maximum number of chars to read
Returns:
char buffer[] --- buffer containing read data
int *nactual --- actual number of characters read
--- equals *nmax except on EOF/error
int *ifail --- error code: FR_no_errors
--- FR_read_fail
--- FR_end_of_file
Description:
This function reads from file (starting at the current position of the file
pointer) storing a maximum of *nmax characters or bytes in the given buffer.
It returns the actual number of characters or bytes read. This is equal
to the number requested, except when the end of file is reached or if a read
error occurs. The end of file error is only returned when no bytes are read.
The file pointer is incremented by the number of characters or bytes read.
In the case of a rollback file, Parasolid does not require the function to
read beyond the actsiz limit which has been returned by FFOPRB.
