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authorKartik Agaram <vc@akkartik.com>2019-08-13 12:40:25 -0700
committerKartik Agaram <vc@akkartik.com>2019-08-13 12:40:25 -0700
commit0059698b0b908904e68c8783deba2394e6d8dff5 (patch)
tree702b686b6a70be07627e5a05c59cc42f2fbd7cb6 /archive/Readme.md
parent63b8b18ef7594fd0bba8e936c40697c68d1376d9 (diff)
downloadmu-0059698b0b908904e68c8783deba2394e6d8dff5.tar.gz
half-done testing get-or-stop
Probably not needed for desugar; I'm just working through what we may
replace the calls to 'get-slice' with if and when we decide to start
focusing error messages and so writing tests for them.
Diffstat (limited to 'archive/Readme.md')
0 files changed, 0 insertions, 0 deletions
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## read a character from stdin, save it to a global, write it to stdout

# variables are always references
#   read their address with their names: x (can't write to their address)
#   read/write their contents with a lookup: *x
var x : char

fn main [
  call read 0/stdin, x, 1/size
  result/EAX <- call write 1/stdout, x, 1/size
  call exit, result/EAX
]

fn read fd : int, x : (address array byte), size : int [
  EBX <- copy fd
  ECX <- copy x
  EDX <- copy size
  EAX <- copy 3/read
  syscall
]

fn write fd : int, x : (address array byte), size : int [
  EBX <- copy fd
  ECX <- copy x
  EDX <- copy size
  EAX <- copy 4/write
  syscall
]

fn exit x : int [
  code/EBX <- copy x
  code/EAX <- copy 1/exit
  syscall
]