READ_DATA_PENDING  410 io.c           #define READ_DATA_BUFFERED(fptr) READ_DATA_PENDING(fptr)
READ_DATA_PENDING  424 io.c               if (!READ_DATA_PENDING(fptr)) {\
READ_DATA_PENDING  863 io.c               return READ_DATA_PENDING(fptr);
READ_DATA_PENDING  869 io.c               if (!READ_DATA_PENDING(fptr)) {
READ_DATA_PENDING 1824 io.c               if (READ_DATA_PENDING(fptr)) return Qfalse;
READ_DATA_PENDING 2100 io.c               if (READ_DATA_PENDING(fptr) == 0) {
READ_DATA_PENDING 8402 io.c           	    if (READ_DATA_PENDING(fptr) || READ_CHAR_PENDING(fptr)) { /* check for buffered data */