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| author | Kartik Agaram <vc@akkartik.com> | 2020-12-01 00:24:00 -0800 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2020-12-01 00:32:43 -0800 |
| commit | a06611f35cf39d201fb2581c81e56c7a8b7ddee6 (patch) | |
| tree | 42c38fc24eab12dfe7d5a17e76b1bbbaf15b6e57 /311decimal-int.subx | |
| parent | 8a73ef705207566e8d32a57bbb513f714e8fb9d6 (diff) | |
| download | mu-a06611f35cf39d201fb2581c81e56c7a8b7ddee6.tar.gz | |
7310 - advent day 1 part 1
In the process I had to: * Fix a bug in reading lines from stdin into streams * Start trailing newlines when parsing ints from streams * Implement `find` in an array
Diffstat (limited to '311decimal-int.subx')
| -rw-r--r-- | 311decimal-int.subx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/311decimal-int.subx b/311decimal-int.subx index 62ec51d6..badae601 100644 --- a/311decimal-int.subx +++ b/311decimal-int.subx @@ -60,6 +60,18 @@ parse-decimal-int-from-stream: # in: (addr stream byte) -> result/eax: int # var end/edx: (addr byte) = &in->data[in->write] 8b/-> *eax 2/r32/edx 8d/copy-address *(eax+edx+0xc) 2/r32/edx + # trim a trailing newline + { + # speculatively trim + 4a/decrement-edx + # if it's a newline, break + 8a/byte-> *edx 0/r32/eax + 81 4/subop/and %eax 0xff/imm32 + 3d/compare-eax-and 0xa/imm32/newline + 74/jump-if-= break/disp8 + # not a newline, so restore it + 42/increment-edx + } # (parse-decimal-int-helper %ecx %edx) # => eax $parse-decimal-int-from-stream:end: |