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annotate string.rhope @ 52:079200bc3e75

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String literals almost working. Print moved out of C runtime.
author Mike Pavone <pavone@retrodev.com>
date Wed, 28 Apr 2010 01:23:30 -0400
parents 7d6a6906b648
children 048046186d22
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51
7d6a6906b648 Added integer type conversions and started on the implementation of String
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1
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2 Blueprint Null String
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3 {
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4 }
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5
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6 Null String[:out(Null String)]
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7 {
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8 out <- Build[Null String()]
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9 }
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10
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11 Depth@Null String[in:out(Int32)]
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12 {
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13 out <- 0i32
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14 }
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15
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16 Blueprint Base String
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17 {
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18 Buffer
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19 Length(Int32,Naked)
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20 }
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52
079200bc3e75 String literals almost working. Print moved out of C runtime.
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22 Print@Base String[string:out]
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23 {
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24 //TODO: Sanitize string (remove terminal escapes and replace invalid UTF)
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25 write[1i32, [string]Buffer >>, Int64[[[string]Buffer >>]Length >>]]
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26 { out <- write[1i32, [Array[1]]Append[10u8], 1i64] }
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27 }
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51
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29 UTF8 Expect[num,arr,index,count,consumed:out]
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30 {
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31 byte <- [arr]Index[index]
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32 {
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33 If[[128u8]>[byte]]
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34 {
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35 //Error: ASCII byte when we were expecting part of a mutlibyte sequence
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36 //treat each byte as a separate character
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37 ncount <- [1i32]+[[count]+[consumed]]
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38 }{
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39 If[[192u8]>[byte]]
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40 {
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41 If[[num]=[1]]
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42 {
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43 //Sequence is complete count as single character
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44 ncount <- [1i32]+[count]
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45 }{
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46 out <- UTF8 Expect[[num]-[1], arr, [index]+[1], count, [1i32]+[consumed]]
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47 }
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48 }{
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49 //Error: too high to be a continuation byte
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50 ncount <- [1i32]+[[count]+[consumed]]
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51 }
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52 }
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53 }{
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54 //Error: string ended in the middle of a multi-byte sequence
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55 out <- [count]+[consumed]
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56 }
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57 Val[ncount]
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58 {
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59 [arr]Next[index]
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60 {
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61 out <- Count UTF8[arr, ~, ncount]
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62 }{
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63 out <- Val[ncount]
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64 }
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65 }
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66 }
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67
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68 Count UTF8[arr,index,count:out]
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69 {
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70 byte <- [arr]Index[index]
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71 If[[128u8]>[byte]]
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72 { ncount <- [1i32]+[count] }
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73 {
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74 If[[192u8]>[byte]]
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75 {
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76 //Error: Encoding for 2nd,3rd or 4th byte of sequence
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77 //treat as a single character
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78 ncount <- [1i32]+[count]
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79 }{
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80 If[[224u8]>[byte]]
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81 {
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82 out <- UTF8 Expect[1, arr, [index]+[1], count, 1]
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83 }{
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84 If[[240u8]>[byte]]
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85 {
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86 out <- UTF8 Expect[2, arr, [index]+[1], count, 1]
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87 }{
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88 If[[245u8]>[byte]]
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89 {
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90 out <- UTF8 Expect[3, arr, [index]+[1], count, 1]
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91 }{
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92 //Error: Out of range of Unicode standard
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93 //treat as a single character
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94 ncount <- [1i32]+[count]
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95 }
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96 }
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97 }
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98 }
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99 }
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100 [arr]Next[index]
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101 {
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102 out <- Count UTF8[arr, ~, ncount]
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103 }{
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104 out <- Val[ncount]
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105 }
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106 }
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107
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108 Blueprint String
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109 {
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110 Left
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111 Right
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112 L Offset(Int32,Naked)
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113 L Length(Int32,Naked)
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114 Depth(Int32,Naked)
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115 Length(Int32,Naked)
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116 }
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117
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118 String[in(Array):out(Base String)]
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119 {
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120 out <- [[Build[Base String()]]Buffer <<[in]]Length <<[Count UTF8[in, 0, 0]]
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121 }
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