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| author | Kartik Agaram <vc@akkartik.com> | 2021-01-15 21:27:52 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2021-01-15 21:27:52 -0800 |
| commit | 0d246473c5270a0f13a2706a1f0204d375f62d30 (patch) | |
| tree | 7fc1fa8109a3d929f4197a88c8efe5b0cca6a0f4 /baremetal/115write-byte.subx | |
| parent | 49424b1933051b6cf1ce3371ada9cd7fa2d31df0 (diff) | |
| download | mu-0d246473c5270a0f13a2706a1f0204d375f62d30.tar.gz | |
7524 - bring back some abort messages
Our infrastructure for displaying errors is far more rudimentary in baremetal. Many ways things can go wrong. But making the attempt seems better than not. I'm also making some effort to keep it easy to see what has been copied over from the top-level, by not modifying copied code to use syntax sugar and so on. It may not be an important enough reason to mix notations in a single file.
Diffstat (limited to 'baremetal/115write-byte.subx')
| -rw-r--r-- | baremetal/115write-byte.subx | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/baremetal/115write-byte.subx b/baremetal/115write-byte.subx index 3ac587f0..45cf9950 100644 --- a/baremetal/115write-byte.subx +++ b/baremetal/115write-byte.subx @@ -22,7 +22,7 @@ append-byte: # f: (addr stream byte), n: int 8b/copy 0/mod/indirect 7/rm32/edi . . . 1/r32/ecx . . # copy *edi to ecx # if (f->write >= f->size) abort 3b/compare 1/mod/*+disp8 7/rm32/edi . . . 1/r32/ecx 8/disp8 . # compare ecx with *(edi+8) - 7d/jump-if->= $append-byte:end/disp8 # TODO: abort + 7d/jump-if->= $append-byte:abort/disp8 $append-byte:to-stream: # write to stream # f->data[f->write] = LSB(n) @@ -40,6 +40,13 @@ $append-byte:end: 5d/pop-to-ebp c3/return +$append-byte:abort: + (draw-text-wrapping-down-then-right-from-cursor-over-full-screen 0 "append-byte: out of space\n" 3) # 3=cyan + { + eb/jump loop/disp8 + } + # never gets here + test-append-byte-single: # - check that append-byte writes to first byte of 'file' # setup |