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# example program: reading events from keyboard or mouse
#
# Keeps printing 'a' until you press a key or click on the mouse.

def main [
  local-scope
  open-console
  {
    e:event, found?:bool <- check-for-interaction
    break-if found?
    print-character-to-display 97, 7/white
    loop
  }
  close-console
  $print e, 10/newline
]
ebx with edx 7c/jump-if-< $write-buffered:to-stream/disp8 # . persist f->write 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 4/disp8 . # copy ebx to *(edi+4) # . flush(f) # . . push args 57/push-edi # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . clear-stream(stream = f+4) # . . push args 8d/copy-address 1/mod/*+disp8 7/rm32/edi . . . 0/r32/eax 4/disp8 . # copy edi+4 to eax 50/push-eax # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . f->write must now be 0; update its cache at ebx 31/xor 3/mod/direct 3/rm32/ebx . . . 3/r32/ebx . . # clear ebx $write-buffered:to-stream: # write to stream # f->data[f->write] = *in # . AL = *in 31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax 8a/copy-byte 0/mod/indirect 6/rm32/esi . . . 0/r32/AL . . # copy byte at *esi to AL # . f->data[f->write] = AL 88/copy-byte 1/mod/*+disp8 4/rm32/sib 7/base/edi 3/index/ebx . 0/r32/AL 0x10/disp8 . # copy AL to *(edi+ebx+16) # ++f->write 43/increment-ebx # ++in 46/increment-esi eb/jump $write-buffered:loop/disp8 $write-buffered:loop-end: # persist necessary variables from registers 89/copy 1/mod/*+disp8 7/rm32/edi . . . 3/r32/ebx 4/disp8 . # copy ebx to *(edi+4) $write-buffered:end: # . restore registers 5f/pop-to-edi 5e/pop-to-esi 5b/pop-to-ebx 5a/pop-to-edx 59/pop-to-ecx 58/pop-to-eax # . epilogue 89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp 5d/pop-to-ebp c3/return test-write-buffered: # - check that write-buffered writes to the file # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . clear-stream($_test-buffered-file->buffer) # . . push args 68/push $_test-buffered-file->buffer/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # write-buffered(_test-buffered-file, "Abc") # . . push args 68/push "Abc"/imm32 68/push _test-buffered-file/imm32 # . . call e8/call write-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # flush(_test-buffered-file) # . . push args 68/push _test-buffered-file/imm32 # . . call e8/call flush/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # check-stream-equal(_test-stream, "Abc", msg) # . . push args 68/push "F - test-write-buffered-single"/imm32 68/push "Abc"/imm32 68/push _test-stream/imm32 # . . call e8/call check-stream-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . end c3/return test-write-buffered-with-intermediate-flush: # - check that write-buffered flushes in the middle if its buffer fills up # setup # . clear-stream(_test-stream) # . . push args 68/push _test-stream/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # . clear-stream($_test-buffered-file->buffer) # . . push args 68/push $_test-buffered-file->buffer/imm32 # . . call e8/call clear-stream/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp # _test-stream can hold 8 bytes, but _test-buffered-file can hold only 6. # Try to write 7 bytes. # . write-buffered(_test-buffered-file, "Abcdefg") # . . push args 68/push "Abcdefg"/imm32 68/push _test-buffered-file/imm32 # . . call e8/call write-buffered/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp # don't flush # 6 bytes should still have gotten to _test-stream # . check-ints-equal(*_test-stream->write, 6, msg) # . . push args 68/push "F - test-write-buffered-with-intermediate-flush: flushed data"/imm32 68/push 6/imm32 # . . push *_test-stream->write b8/copy-to-eax _test-stream/imm32 ff 6/subop/push 0/mod/indirect 0/rm32/eax . . . . . . # push *eax # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # and 1 byte should still be in _test-buffered-file # . check-ints-equal(*_test-buffered-file->write, 1, msg) # . . push args 68/push "F - test-write-buffered-with-intermediate-flush: unflushed bytes"/imm32 68/push 1/imm32 # . . push *_test-buffered-file->write b8/copy-to-eax _test-buffered-file/imm32 ff 6/subop/push 1/mod/*+disp8 0/rm32/eax . . . . 4/disp8 . # push *(eax+4) # . . call e8/call check-ints-equal/disp32 # . . discard args 81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp # . end c3/return == data # The buffered file for standard error. Stderr: # buffered-file # file descriptor or (addr stream byte) 2/imm32 # standard error $Stderr->buffer: # inlined fields for a stream # current write index 0/imm32 # current read index 0/imm32 # size 8/imm32 # data 00 00 00 00 00 00 00 00 # 8 bytes # TODO: 8 bytes is too small. We'll need to grow the buffer for efficiency. But # I don't want to type in 1024 bytes here. # . . vim:nowrap:textwidth=0