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authorKartik K. Agaram <vc@akkartik.com>2016-10-15 20:59:26 -0700
committerKartik K. Agaram <vc@akkartik.com>2016-10-15 20:59:26 -0700
commit392249a76da19cae798998dda198fbe59fbee905 (patch)
tree05ce1ea10135b0abb98a71547d9e556803ccd605 /html/040brace.cc.html
parentf510af3bae170e89fba8bd118e1e5a36451e3c97 (diff)
downloadmu-392249a76da19cae798998dda198fbe59fbee905.tar.gz
3501
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0 files changed, 0 insertions, 0 deletions
ont-weight: bold } /* Keyword.Constant */ .highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */ .highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */ .highlight .kp { color: #008800 } /* Keyword.Pseudo */ .highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */ .highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */ .highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */ .highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */ .highlight .na { color: #336699 } /* Name.Attribute */ .highlight .nb { color: #003388 } /* Name.Builtin */ .highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */ .highlight .no { color: #003366; font-weight: bold } /* Name.Constant */ .highlight .nd { color: #555555 } /* Name.Decorator */ .highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */ .highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */ .highlight .nl { color: #336699; font-style: italic } /* Name.Label */ .highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */ .highlight .py { color: #336699; font-weight: bold } /* Name.Property */ .highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */ .highlight .nv { color: #336699 } /* Name.Variable */ .highlight .ow { color: #008800 } /* Operator.Word */ .highlight .w { color: #bbbbbb } /* Text.Whitespace */ .highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */ .highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */ .highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */ .highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */ .highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */ .highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */ .highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */ .highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */ .highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */ .highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
# parse a decimal int at the commandline
#
# To run:
#   $ ./translate parse-int.mu
#   $ ./a.elf 123
#   $ echo $?
#   123

fn main _args: (addr array addr array byte) -> _/ebx: int {
  # if no args, print a message and exit
  var args/esi: (addr array addr array byte) <- copy _args
  var n/ecx: int <- length args
  compare n, 1
  {
    break-if->
    print-string 0/screen, "usage: parse-int <integer>\n"
    return 1
  }
  # otherwise parse the first arg as an integer
  var in/ecx: (addr addr array byte) <- index args, 1
  var out/eax: int <- parse-int *in
  return out
}

fn parse-int _in: (addr array byte) -> _/eax: int {
  var in/esi: (addr array byte) <- copy _in
  var len/edx: int <- length in
  var i/ecx: int <- copy 0
  var result/edi: int <- copy 0
  {
    compare i, len
    break-if->=
    # result *= 10
    var ten/eax: int <- copy 0xa
    result <- multiply ten
    # c = in[i]
    var tmp/ebx: (addr byte) <- index in, i
    var c/eax: byte <- copy-byte *tmp
    #
    var g/eax: grapheme <- copy c
    var digit/eax: int <- to-decimal-digit g
    result <- add digit
    i <- increment
    loop
  }
  return result
}