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authorKartik Agaram <vc@akkartik.com>2019-11-29 15:23:22 -0800
committerKartik Agaram <vc@akkartik.com>2019-11-29 15:23:22 -0800
commita3443cac7df9a0f3607ce3553f95a28452bf2539 (patch)
treee50548eadcc04df550b8494232b2c4e121090ecf /archive/2.vm/args.mu
parent8d5437838b46fef04d32864f3c294e78515c200b (diff)
downloadmu-a3443cac7df9a0f3607ce3553f95a28452bf2539.tar.gz
5779
Snapshot with new skeleton for parsing function body.
New test still failing, but only in the one expected place.
Diffstat (limited to 'archive/2.vm/args.mu')
0 files changed, 0 insertions, 0 deletions
 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-16 07:43:22 +0000


 


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# https://adventofcode.com/2020/day/5
#
# To run (on Linux):
#   $ git clone https://github.com/akkartik/mu
#   $ cd mu
#   $ ./translate advent2020/5a.mu
#   $ ./a.elf < input
#
# You'll need to register to download the 'input' file for yourself.

fn main -> _/ebx: int {
  var line-storage: (stream byte 0x10)  # 16 bytes is enough
  var line/edx: (addr stream byte) <- address line-storage
  var max-seat-id/edi: int <- copy 0
  {
    # read line from stdin
    clear-stream line
    read-line-from-real-keyboard line
    print-stream-to-real-screen line
    # if line is empty (not even a newline), quit
    var done?/eax: boolean <- stream-empty? line
    compare done?, 0/false
    break-if-!=
    # process line
    var seat-id/eax: int <- convert-from-binary line
    compare seat-id, max-seat-id
    {
      break-if-<=
      max-seat-id <- copy seat-id
    }
    loop
  }
  print-int32-decimal 0, max-seat-id
  print-string 0, "\n"
  return 0
}

fn convert-from-binary in: (addr stream byte) -> _/eax: int {
  var result/edi: int <- copy 0
  var i/ecx: int <- copy 9  # loop counter and also exponent
  {
    compare i, 0
    break-if-<
    var c/eax: byte <- read-byte in
#?     print-string 0, "char: "
#?     {
#?       var c2/eax: int <- copy c
#?       print-int32-hex 0, c2
#?     }
#?     print-string 0, "\n"
    var bit/edx: int <- copy 0
    {
      compare c, 0x42/B
      break-if-!=
      bit <- copy 1
    }
    {
      compare c, 0x52/R
      break-if-!=
      bit <- copy 1
    }
#?     print-string 0, "bit: "
#?     print-int32-decimal 0, bit
#?     print-string 0, "\n"
    var bit-value/eax: int <- repeated-shift-left bit, i
#?     print-string 0, "bit value: "
#?     print-int32-decimal 0, bit-value
#?     print-string 0, "\n"
    result <- add bit-value
#?     print-string 0, "result: "
#?     print-int32-decimal 0, result
#?     print-string 0, "\n"
    i <- decrement
    loop
  }
  print-int32-decimal 0, result
  print-string 0, "\n"
  return result
}



 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-11-16 07:43:22 +0000