adamc@14
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1 (* Copyright (c) 2008, Adam Chlipala
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2 * All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * - Redistributions of source code must retain the above copyright notice,
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8 * this list of conditions and the following disclaimer.
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9 * - Redistributions in binary form must reproduce the above copyright notice,
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10 * this list of conditions and the following disclaimer in the documentation
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11 * and/or other materials provided with the distribution.
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12 * - The names of contributors may not be used to endorse or promote products
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13 * derived from this software without specific prior written permission.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 *)
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27
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28 structure Prim :> PRIM = struct
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29
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30 datatype t =
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31 Int of Int64.int
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32 | Float of Real64.real
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33 | String of string
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34 | Char of char
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35
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36 open Print.PD
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37 open Print
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38
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39 fun p_t t =
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40 case t of
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41 Int n => string (Int64.toString n)
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42 | Float n => string (Real64.toString n)
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43 | String s => box [string "\"", string (String.toString s), string "\""]
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44 | Char ch => box [string "#\"", string (String.toString (String.str ch)), string "\""]
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45
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46 fun int2s n =
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47 if Int64.compare (n, Int64.fromInt 0) = LESS then
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48 "-" ^ Int64.toString (Int64.~ n) ^ "LL"
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49 else
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50 Int64.toString n ^ "LL"
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51
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52 fun int2s' n =
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53 if Int64.compare (n, Int64.fromInt 0) = LESS then
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54 "-" ^ Int64.toString (Int64.~ n)
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55 else
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56 Int64.toString n
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57
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58 fun float2s n =
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59 if Real64.compare (n, Real64.fromInt 0) = LESS then
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60 "-" ^ Real64.toString (Real64.~ n)
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61 else
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62 Real64.toString n
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63
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64 fun toString t =
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65 case t of
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66 Int n => int2s' n
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67 | Float n => float2s n
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68 | String s => s
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69 | Char ch => str ch
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70
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71 fun pad (n, ch, s) =
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72 if size s >= n then
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73 s
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74 else
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75 str ch ^ pad (n-1, ch, s)
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76
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77 fun p_t_GCC t =
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78 case t of
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79 Int n => string (int2s n)
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80 | Float n => string (float2s n)
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81 | String s => box [string "\"", string (String.toCString s), string "\""]
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82 | Char ch => box [string "'", string (Char.toCString ch), string "'"]
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83
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84 fun equal x =
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85 case x of
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86 (Int n1, Int n2) => n1 = n2
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87 | (Float n1, Float n2) => Real64.== (n1, n2)
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88 | (String s1, String s2) => s1 = s2
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89 | (Char ch1, Char ch2) => ch1 = ch2
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90
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91 | _ => false
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92
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93 fun compare (p1, p2) =
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94 case (p1, p2) of
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95 (Int n1, Int n2) => Int64.compare (n1, n2)
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96 | (Int _, _) => LESS
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97 | (_, Int _) => GREATER
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98
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99 | (Float n1, Float n2) => Real64.compare (n1, n2)
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100 | (Float _, _) => LESS
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101 | (_, Float _) => GREATER
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102
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103 | (String n1, String n2) => String.compare (n1, n2)
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104 | (String _, _) => LESS
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105 | (_, String _) => GREATER
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106
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107 | (Char ch1, Char ch2) => Char.compare (ch1, ch2)
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108
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109 end
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