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author | Kartik K. Agaram <vc@akkartik.com> | 2021-03-03 22:09:50 -0800 |
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committer | Kartik K. Agaram <vc@akkartik.com> | 2021-03-03 22:21:03 -0800 |
commit | 71e4f3812982dba2efb471283d310224e8db363e (patch) | |
tree | ea111a1acb8b8845dbda39c0e1b4bac1d198143b /linux/advent2020/4a.mu | |
parent | c6b928be29ac8cdb4e4d6e1eaa20420ff03e5a4c (diff) | |
download | mu-71e4f3812982dba2efb471283d310224e8db363e.tar.gz |
7842 - new directory organization
Baremetal is now the default build target and therefore has its sources at the top-level. Baremetal programs build using the phase-2 Mu toolchain that requires a Linux kernel. This phase-2 codebase which used to be at the top-level is now under the linux/ directory. Finally, the phase-2 toolchain, while self-hosting, has a way to bootstrap from a C implementation, which is now stored in linux/bootstrap. The bootstrap C implementation uses some literate programming tools that are now in linux/bootstrap/tools. So the whole thing has gotten inverted. Each directory should build one artifact and include the main sources (along with standard library). Tools used for building it are relegated to sub-directories, even though those tools are often useful in their own right, and have had lots of interesting programs written using them. A couple of things have gotten dropped in this process: - I had old ways to run on just a Linux kernel, or with a Soso kernel. No more. - I had some old tooling for running a single test at the cursor. I haven't used that lately. Maybe I'll bring it back one day. The reorg isn't done yet. Still to do: - redo documentation everywhere. All the README files, all other markdown, particularly vocabulary.md. - clean up how-to-run comments at the start of programs everywhere - rethink what to do with the html/ directory. Do we even want to keep supporting it? In spite of these shortcomings, all the scripts at the top-level, linux/ and linux/bootstrap are working. The names of the scripts also feel reasonable. This is a good milestone to take stock at.
Diffstat (limited to 'linux/advent2020/4a.mu')
-rw-r--r-- | linux/advent2020/4a.mu | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/linux/advent2020/4a.mu b/linux/advent2020/4a.mu new file mode 100644 index 00000000..e645da24 --- /dev/null +++ b/linux/advent2020/4a.mu @@ -0,0 +1,75 @@ +# https://adventofcode.com/2020/day/4 +# +# To run (on Linux): +# $ git clone https://github.com/akkartik/mu +# $ cd mu +# $ ./translate_mu apps/advent2020/4a.mu +# $ ./a.elf < input +# +# You'll need to register to download the 'input' file for yourself. + +fn main -> _/ebx: int { + var curr-passport-field-count/esi: int <- copy 0 + var valid-passport-count/edi: int <- copy 0 + var line-storage: (stream byte 0x100) # 256 bytes + var line/ecx: (addr stream byte) <- address line-storage + var slice-storage: slice + var slice/edx: (addr slice) <- address slice-storage + $main:line-loop: { + # read line from stdin + clear-stream line + read-line-from-real-keyboard line + # if line is empty (not even a newline), quit + var done?/eax: boolean <- stream-empty? line + compare done?, 0/false + break-if-!= + print-stream-to-real-screen line + # if line has just a newline, process passport + skip-chars-matching-whitespace line + var new-passport?/eax: boolean <- stream-empty? line + { + compare new-passport?, 0/false + break-if-= + compare curr-passport-field-count, 7 + { + break-if-!= + valid-passport-count <- increment + print-string 0, "=> " + print-int32-decimal 0, valid-passport-count + print-string 0, "\n" + } + curr-passport-field-count <- copy 0 + loop $main:line-loop + } + $main:word-loop: { + next-word line, slice + var done?/eax: boolean <- slice-empty? slice + compare done?, 0/false + break-if-!= + print-string 0, " " + print-slice-to-real-screen slice + # treat cid as optional + var optional?/eax: boolean <- slice-starts-with? slice, "cid:" + compare optional?, 0/false + { + break-if-!= + # otherwise assume there are no invalid fields and no duplicate fields + curr-passport-field-count <- increment + print-string 0, " => " + print-int32-decimal 0, curr-passport-field-count + } + print-string 0, "\n" + loop + } + loop + } + # process final passport + compare curr-passport-field-count, 7 + { + break-if-!= + valid-passport-count <- increment + } + print-int32-decimal 0, valid-passport-count + print-string 0, "\n" + return 0 +} |