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7597 | akron1 | 1 | (* |
2 | BSD 2-Clause License |
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3 | |||
4 | Copyright (c) 2018, 2019, Anton Krotov |
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5 | All rights reserved. |
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6 | *) |
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7 | |||
8 | MODULE ARITH; |
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9 | |||
10 | IMPORT AVLTREES, STRINGS, MACHINE, UTILS; |
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11 | |||
12 | |||
13 | CONST |
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14 | |||
15 | tINTEGER* = 1; tREAL* = 2; tSET* = 3; |
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16 | tBOOLEAN* = 4; tCHAR* = 5; tWCHAR* = 6; |
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17 | tSTRING* = 7; |
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18 | |||
19 | |||
20 | TYPE |
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21 | |||
22 | RELATION* = ARRAY 3 OF CHAR; |
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23 | |||
24 | VALUE* = RECORD |
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25 | |||
26 | typ*: INTEGER; |
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27 | |||
28 | int: INTEGER; |
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29 | float: REAL; |
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30 | set: SET; |
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31 | bool: BOOLEAN; |
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32 | |||
33 | string*: AVLTREES.DATA |
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34 | |||
35 | END; |
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36 | |||
37 | |||
38 | VAR |
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39 | |||
40 | digit: ARRAY 256 OF INTEGER; |
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41 | |||
42 | |||
43 | PROCEDURE Int* (v: VALUE): INTEGER; |
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44 | VAR |
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45 | res: INTEGER; |
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46 | |||
47 | BEGIN |
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48 | |||
49 | IF v.typ = tINTEGER THEN |
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50 | res := v.int |
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51 | ELSIF v.typ = tCHAR THEN |
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52 | res := v.int |
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53 | ELSIF v.typ = tWCHAR THEN |
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54 | res := v.int |
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55 | ELSIF v.typ = tSET THEN |
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56 | res := ORD(v.set); |
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57 | IF MACHINE._64to32 THEN |
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58 | res := MACHINE.Int32To64(res) |
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59 | END |
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60 | ELSIF v.typ = tBOOLEAN THEN |
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61 | res := ORD(v.bool) |
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62 | END |
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63 | |||
64 | RETURN res |
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65 | END Int; |
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66 | |||
67 | |||
68 | PROCEDURE getBool* (v: VALUE): BOOLEAN; |
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69 | BEGIN |
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70 | ASSERT(v.typ = tBOOLEAN); |
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71 | |||
72 | RETURN v.bool |
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73 | END getBool; |
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74 | |||
75 | |||
76 | PROCEDURE Float* (v: VALUE): REAL; |
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77 | BEGIN |
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78 | ASSERT(v.typ = tREAL); |
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79 | |||
80 | RETURN v.float |
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81 | END Float; |
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82 | |||
83 | |||
84 | PROCEDURE check* (v: VALUE): BOOLEAN; |
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85 | VAR |
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86 | error: BOOLEAN; |
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87 | |||
88 | BEGIN |
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89 | error := FALSE; |
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90 | |||
91 | IF (v.typ = tINTEGER) & ((v.int < MACHINE.target.minInt) OR (v.int > MACHINE.target.maxInt)) THEN |
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92 | error := TRUE |
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93 | ELSIF (v.typ = tCHAR) & ((v.int < 0) OR (v.int > 255)) THEN |
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94 | error := TRUE |
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95 | ELSIF (v.typ = tWCHAR) & ((v.int < 0) OR (v.int > 65535)) THEN |
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96 | error := TRUE |
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97 | ELSIF (v.typ = tREAL) & ((v.float < -MACHINE.target.maxReal) OR (v.float > MACHINE.target.maxReal)) THEN |
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98 | error := TRUE |
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99 | END |
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100 | |||
101 | RETURN ~error |
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102 | END check; |
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103 | |||
104 | |||
105 | PROCEDURE isZero* (v: VALUE): BOOLEAN; |
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106 | VAR |
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107 | res: BOOLEAN; |
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108 | BEGIN |
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109 | ASSERT(v.typ IN {tINTEGER, tREAL}); |
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110 | |||
111 | IF v.typ = tINTEGER THEN |
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112 | res := v.int = 0 |
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113 | ELSIF v.typ = tREAL THEN |
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114 | res := v.float = 0.0 |
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115 | END |
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116 | |||
117 | RETURN res |
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118 | END isZero; |
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119 | |||
120 | |||
121 | PROCEDURE iconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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122 | VAR |
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123 | value: INTEGER; |
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124 | i: INTEGER; |
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125 | d: INTEGER; |
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126 | |||
127 | BEGIN |
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128 | error := 0; |
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129 | value := 0; |
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130 | |||
131 | i := 0; |
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132 | WHILE STRINGS.digit(s[i]) & (error = 0) DO |
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133 | d := digit[ORD(s[i])]; |
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134 | IF value <= (UTILS.maxint - d) DIV 10 THEN |
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135 | value := value * 10 + d; |
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136 | INC(i) |
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137 | ELSE |
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138 | error := 1 |
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139 | END |
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140 | END; |
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141 | |||
142 | IF error = 0 THEN |
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143 | v.int := value; |
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144 | v.typ := tINTEGER; |
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145 | IF ~check(v) THEN |
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146 | error := 1 |
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147 | END |
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148 | END |
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149 | |||
150 | END iconv; |
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151 | |||
152 | |||
153 | PROCEDURE hconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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154 | VAR |
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155 | value: INTEGER; |
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156 | i: INTEGER; |
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157 | n: INTEGER; |
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158 | d: INTEGER; |
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159 | |||
160 | BEGIN |
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161 | ASSERT(STRINGS.digit(s[0])); |
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162 | |||
163 | error := 0; |
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164 | value := 0; |
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165 | |||
166 | n := -1; |
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167 | i := 0; |
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168 | WHILE (s[i] # "H") & (s[i] # "X") & (error = 0) DO |
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169 | |||
170 | d := digit[ORD(s[i])]; |
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171 | IF (n = -1) & (d # 0) THEN |
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172 | n := i |
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173 | END; |
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174 | |||
175 | IF (n # -1) & (i - n + 1 > MACHINE.target.maxHex) THEN |
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176 | error := 2 |
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177 | ELSE |
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178 | value := value * 16 + d; |
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179 | INC(i) |
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180 | END |
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181 | |||
182 | END; |
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183 | |||
184 | IF MACHINE._64to32 THEN |
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185 | value := MACHINE.Int32To64(value); |
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186 | END; |
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187 | |||
188 | IF (s[i] = "X") & (n # -1) & (i - n > 4) THEN |
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189 | error := 3 |
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190 | END; |
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191 | |||
192 | IF error = 0 THEN |
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193 | v.int := value; |
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194 | IF s[i] = "X" THEN |
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195 | v.typ := tCHAR; |
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196 | IF ~check(v) THEN |
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197 | v.typ := tWCHAR; |
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198 | IF ~check(v) THEN |
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199 | error := 3 |
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200 | END |
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201 | END |
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202 | ELSE |
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203 | v.typ := tINTEGER; |
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204 | IF ~check(v) THEN |
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205 | error := 2 |
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206 | END |
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207 | END |
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208 | END |
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209 | |||
210 | END hconv; |
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211 | |||
212 | |||
213 | PROCEDURE opFloat2 (VAR a: REAL; b: REAL; op: CHAR): BOOLEAN; |
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214 | VAR |
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215 | max: REAL; |
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216 | res: BOOLEAN; |
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217 | |||
218 | BEGIN |
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219 | max := UTILS.maxreal; |
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220 | |||
221 | CASE op OF |
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222 | |"+": |
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223 | IF (a < 0.0) & (b < 0.0) THEN |
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224 | res := a > -max - b |
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225 | ELSIF (a > 0.0) & (b > 0.0) THEN |
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226 | res := a < max - b |
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227 | ELSE |
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228 | res := TRUE |
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229 | END; |
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230 | IF res THEN |
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231 | a := a + b |
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232 | END |
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233 | |||
234 | |"-": |
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235 | IF (a < 0.0) & (b > 0.0) THEN |
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236 | res := a > b - max |
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237 | ELSIF (a > 0.0) & (b < 0.0) THEN |
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238 | res := a < b + max |
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239 | ELSE |
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240 | res := TRUE |
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241 | END; |
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242 | IF res THEN |
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243 | a := a - b |
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244 | END |
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245 | |||
246 | |"*": |
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247 | IF (ABS(a) > 1.0) & (ABS(b) > 1.0) THEN |
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248 | res := ABS(a) < max / ABS(b) |
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249 | ELSE |
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250 | res := TRUE |
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251 | END; |
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252 | IF res THEN |
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253 | a := a * b |
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254 | END |
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255 | |||
256 | |"/": |
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257 | IF ABS(b) < 1.0 THEN |
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258 | res := ABS(a) < max * ABS(b) |
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259 | ELSE |
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260 | res := TRUE |
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261 | END; |
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262 | IF res THEN |
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263 | a := a / b |
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264 | END |
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265 | |||
266 | END |
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267 | |||
268 | RETURN res |
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269 | END opFloat2; |
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270 | |||
271 | |||
272 | PROCEDURE fconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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273 | VAR |
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274 | value: REAL; |
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275 | exp10: REAL; |
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276 | i, n, d: INTEGER; |
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277 | minus: BOOLEAN; |
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278 | |||
279 | BEGIN |
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280 | error := 0; |
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281 | value := 0.0; |
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282 | exp10 := 10.0; |
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283 | minus := FALSE; |
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284 | n := 0; |
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285 | |||
286 | i := 0; |
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287 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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288 | IF opFloat2(value, 10.0, "*") & opFloat2(value, FLT(digit[ORD(s[i])]), "+") THEN |
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289 | INC(i) |
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290 | ELSE |
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291 | error := 4 |
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292 | END |
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293 | END; |
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294 | |||
295 | INC(i); |
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296 | |||
297 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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298 | IF opFloat2(value, FLT(digit[ORD(s[i])]) / exp10, "+") & opFloat2(exp10, 10.0, "*") THEN |
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299 | INC(i) |
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300 | ELSE |
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301 | error := 4 |
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302 | END |
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303 | END; |
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304 | |||
305 | IF s[i] = "E" THEN |
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306 | INC(i) |
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307 | END; |
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308 | |||
309 | IF (s[i] = "-") OR (s[i] = "+") THEN |
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310 | minus := s[i] = "-"; |
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311 | INC(i) |
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312 | END; |
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313 | |||
314 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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315 | d := digit[ORD(s[i])]; |
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316 | IF n <= (UTILS.maxint - d) DIV 10 THEN |
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317 | n := n * 10 + d; |
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318 | INC(i) |
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319 | ELSE |
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320 | error := 5 |
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321 | END |
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322 | END; |
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323 | |||
324 | exp10 := 1.0; |
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325 | WHILE (error = 0) & (n > 0) DO |
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326 | IF opFloat2(exp10, 10.0, "*") THEN |
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327 | DEC(n) |
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328 | ELSE |
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329 | error := 4 |
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330 | END |
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331 | END; |
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332 | |||
333 | IF error = 0 THEN |
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334 | IF minus THEN |
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335 | IF ~opFloat2(value, exp10, "/") THEN |
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336 | error := 4 |
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337 | END |
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338 | ELSE |
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339 | IF ~opFloat2(value, exp10, "*") THEN |
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340 | error := 4 |
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341 | END |
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342 | END |
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343 | END; |
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344 | |||
345 | IF error = 0 THEN |
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346 | v.float := value; |
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347 | v.typ := tREAL; |
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348 | IF ~check(v) THEN |
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349 | error := 4 |
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350 | END |
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351 | END |
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352 | |||
353 | END fconv; |
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354 | |||
355 | |||
356 | PROCEDURE setChar* (VAR v: VALUE; ord: INTEGER); |
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357 | BEGIN |
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358 | v.typ := tCHAR; |
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359 | v.int := ord |
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360 | END setChar; |
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361 | |||
362 | |||
363 | PROCEDURE setWChar* (VAR v: VALUE; ord: INTEGER); |
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364 | BEGIN |
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365 | v.typ := tWCHAR; |
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366 | v.int := ord |
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367 | END setWChar; |
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368 | |||
369 | |||
370 | PROCEDURE addInt (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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371 | VAR |
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372 | error: BOOLEAN; |
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373 | |||
374 | BEGIN |
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375 | IF (a > 0) & (b > 0) THEN |
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376 | error := a > UTILS.maxint - b |
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377 | ELSIF (a < 0) & (b < 0) THEN |
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378 | error := a < UTILS.minint - b |
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379 | ELSE |
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380 | error := FALSE |
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381 | END; |
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382 | |||
383 | IF ~error THEN |
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384 | a := a + b |
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385 | ELSE |
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386 | a := 0 |
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387 | END |
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388 | |||
389 | RETURN ~error |
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390 | END addInt; |
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391 | |||
392 | |||
393 | PROCEDURE subInt (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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394 | VAR |
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395 | error: BOOLEAN; |
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396 | |||
397 | BEGIN |
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398 | IF (a > 0) & (b < 0) THEN |
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399 | error := a > UTILS.maxint + b |
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400 | ELSIF (a < 0) & (b > 0) THEN |
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401 | error := a < UTILS.minint + b |
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402 | ELSIF (a = 0) & (b < 0) THEN |
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403 | error := b = UTILS.minint |
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404 | ELSE |
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405 | error := FALSE |
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406 | END; |
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407 | |||
408 | IF ~error THEN |
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409 | a := a - b |
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410 | ELSE |
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411 | a := 0 |
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412 | END |
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413 | |||
414 | RETURN ~error |
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415 | END subInt; |
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416 | |||
417 | |||
418 | PROCEDURE lg2 (x: INTEGER): INTEGER; |
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419 | VAR |
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420 | n: INTEGER; |
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421 | |||
422 | BEGIN |
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423 | ASSERT(x > 0); |
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424 | |||
425 | n := 0; |
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426 | WHILE ~ODD(x) DO |
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427 | x := x DIV 2; |
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428 | INC(n) |
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429 | END; |
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430 | |||
431 | IF x # 1 THEN |
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432 | n := 255 |
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433 | END |
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434 | |||
435 | RETURN n |
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436 | END lg2; |
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437 | |||
438 | |||
439 | PROCEDURE mulInt* (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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440 | VAR |
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441 | error: BOOLEAN; |
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442 | min, max: INTEGER; |
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443 | |||
444 | BEGIN |
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445 | min := UTILS.minint; |
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446 | max := UTILS.maxint; |
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447 | |||
448 | IF ((a > 1) & (b > 1)) OR ((a < 0) & (b < 0)) THEN |
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449 | error := (a = min) OR (b = min) OR (ABS(a) > max DIV ABS(b)) |
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450 | |||
451 | ELSIF ((a > 1) & (b < 0)) OR ((a < 0) & (b > 1)) THEN |
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452 | error := (a = min) OR (b = min); |
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453 | IF ~error THEN |
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454 | IF lg2(ABS(a)) + lg2(ABS(b)) >= UTILS.bit_depth THEN |
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455 | error := ABS(a) > max DIV ABS(b) |
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456 | END |
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457 | END |
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458 | |||
459 | ELSE |
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460 | error := FALSE |
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461 | END; |
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462 | |||
463 | IF ~error THEN |
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464 | a := a * b |
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465 | ELSE |
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466 | a := 0 |
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467 | END |
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468 | |||
469 | RETURN ~error |
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470 | END mulInt; |
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471 | |||
472 | |||
473 | PROCEDURE _ASR (x, n: INTEGER): INTEGER; |
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474 | BEGIN |
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475 | IF MACHINE._64to32 THEN |
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476 | x := MACHINE.Int32To64(x) |
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477 | END |
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478 | |||
479 | RETURN ASR(x, n) |
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480 | END _ASR; |
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481 | |||
482 | |||
483 | PROCEDURE _LSR (x, n: INTEGER): INTEGER; |
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484 | BEGIN |
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485 | IF MACHINE._64to32 THEN |
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486 | x := MACHINE.Int64To32(x); |
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487 | x := LSR(x, n); |
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488 | x := MACHINE.Int32To64(x) |
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489 | ELSE |
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490 | x := LSR(x, n) |
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491 | END |
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492 | |||
493 | RETURN x |
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494 | END _LSR; |
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495 | |||
496 | |||
497 | PROCEDURE _LSL (x, n: INTEGER): INTEGER; |
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498 | BEGIN |
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499 | x := LSL(x, n); |
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500 | IF MACHINE._64to32 THEN |
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501 | x := MACHINE.Int32To64(x) |
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502 | END |
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503 | |||
504 | RETURN x |
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505 | END _LSL; |
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506 | |||
507 | |||
508 | PROCEDURE _ROR1_32 (x: INTEGER): INTEGER; |
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509 | BEGIN |
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510 | x := MACHINE.Int64To32(x); |
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511 | x := ORD(BITS(LSR(x, 1)) + BITS(LSL(x, 31))) |
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512 | RETURN MACHINE.Int32To64(x) |
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513 | END _ROR1_32; |
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514 | |||
515 | |||
516 | PROCEDURE _ROR (x, n: INTEGER): INTEGER; |
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517 | BEGIN |
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518 | IF MACHINE._64to32 THEN |
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519 | n := n MOD 32; |
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520 | WHILE n > 0 DO |
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521 | x := _ROR1_32(x); |
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522 | DEC(n) |
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523 | END |
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524 | ELSE |
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525 | x := ROR(x, n) |
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526 | END |
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527 | |||
528 | RETURN x |
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529 | END _ROR; |
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530 | |||
531 | |||
532 | PROCEDURE opInt* (VAR a: VALUE; b: VALUE; op: CHAR): BOOLEAN; |
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533 | VAR |
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534 | success: BOOLEAN; |
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535 | |||
536 | BEGIN |
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537 | success := TRUE; |
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538 | |||
539 | CASE op OF |
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540 | |"+": success := addInt(a.int, b.int) |
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541 | |"-": success := subInt(a.int, b.int) |
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542 | |"*": success := mulInt(a.int, b.int) |
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543 | |"/": success := FALSE |
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544 | |"D": IF (b.int # -1) OR (a.int # UTILS.minint) THEN a.int := a.int DIV b.int ELSE success := FALSE END |
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545 | |"M": a.int := a.int MOD b.int |
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546 | |"L": a.int := _LSL(a.int, b.int) |
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547 | |"A": a.int := _ASR(a.int, b.int) |
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548 | |"O": a.int := _ROR(a.int, b.int) |
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549 | |"R": a.int := _LSR(a.int, b.int) |
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550 | |"m": a.int := MIN(a.int, b.int) |
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551 | |"x": a.int := MAX(a.int, b.int) |
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552 | END; |
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553 | a.typ := tINTEGER |
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554 | |||
555 | RETURN success & check(a) |
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556 | END opInt; |
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557 | |||
558 | |||
559 | PROCEDURE charToStr* (c: VALUE; VAR s: ARRAY OF CHAR); |
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560 | BEGIN |
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561 | s[0] := CHR(c.int); |
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562 | s[1] := 0X |
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563 | END charToStr; |
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564 | |||
565 | |||
566 | PROCEDURE opSet* (VAR a: VALUE; b: VALUE; op: CHAR); |
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567 | BEGIN |
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568 | CASE op OF |
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569 | |"+": a.set := a.set + b.set |
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570 | |"-": a.set := a.set - b.set |
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571 | |"*": a.set := a.set * b.set |
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572 | |"/": a.set := a.set / b.set |
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573 | END; |
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574 | a.typ := tSET |
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575 | END opSet; |
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576 | |||
577 | |||
578 | PROCEDURE opFloat* (VAR a: VALUE; b: VALUE; op: CHAR): BOOLEAN; |
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579 | BEGIN |
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580 | a.typ := tREAL |
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581 | RETURN opFloat2(a.float, b.float, op) & check(a) |
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582 | END opFloat; |
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583 | |||
584 | |||
585 | PROCEDURE ord* (VAR v: VALUE); |
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586 | BEGIN |
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587 | CASE v.typ OF |
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588 | |tCHAR, tWCHAR: |
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589 | |tBOOLEAN: v.int := ORD(v.bool) |
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590 | |tSET: |
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591 | v.int := ORD(v.set); |
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592 | IF MACHINE._64to32 THEN |
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593 | v.int := MACHINE.Int32To64(v.int) |
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594 | END |
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595 | END; |
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596 | v.typ := tINTEGER |
||
597 | END ord; |
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598 | |||
599 | |||
600 | PROCEDURE odd* (VAR v: VALUE); |
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601 | BEGIN |
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602 | v.typ := tBOOLEAN; |
||
603 | v.bool := ODD(v.int) |
||
604 | END odd; |
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605 | |||
606 | |||
607 | PROCEDURE bits* (VAR v: VALUE); |
||
608 | BEGIN |
||
609 | v.typ := tSET; |
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610 | v.set := BITS(v.int) |
||
611 | END bits; |
||
612 | |||
613 | |||
614 | PROCEDURE abs* (VAR v: VALUE): BOOLEAN; |
||
615 | VAR |
||
616 | res: BOOLEAN; |
||
617 | |||
618 | BEGIN |
||
619 | res := FALSE; |
||
620 | |||
621 | CASE v.typ OF |
||
622 | |tREAL: |
||
623 | v.float := ABS(v.float); |
||
624 | res := TRUE |
||
625 | |tINTEGER: |
||
626 | IF v.int # UTILS.minint THEN |
||
627 | v.int := ABS(v.int); |
||
628 | res := TRUE |
||
629 | END |
||
630 | END |
||
631 | |||
632 | RETURN res |
||
633 | END abs; |
||
634 | |||
635 | |||
636 | PROCEDURE floor* (VAR v: VALUE): BOOLEAN; |
||
637 | VAR |
||
638 | res: BOOLEAN; |
||
639 | |||
640 | BEGIN |
||
641 | v.typ := tINTEGER; |
||
642 | res := (FLT(UTILS.minint) <= v.float) & (v.float <= FLT(UTILS.maxint)); |
||
643 | IF res THEN |
||
644 | v.int := FLOOR(v.float) |
||
645 | END |
||
646 | |||
647 | RETURN res |
||
648 | END floor; |
||
649 | |||
650 | |||
651 | PROCEDURE flt* (VAR v: VALUE); |
||
652 | BEGIN |
||
653 | v.typ := tREAL; |
||
654 | v.float := FLT(v.int) |
||
655 | END flt; |
||
656 | |||
657 | |||
658 | PROCEDURE neg* (VAR v: VALUE): BOOLEAN; |
||
659 | VAR |
||
660 | z: VALUE; |
||
661 | res: BOOLEAN; |
||
662 | |||
663 | BEGIN |
||
664 | res := TRUE; |
||
665 | |||
666 | z.typ := tINTEGER; |
||
667 | z.int := 0; |
||
668 | |||
669 | CASE v.typ OF |
||
670 | |tREAL: v.float := -v.float |
||
671 | |tSET: v.set := -v.set |
||
672 | |tINTEGER: res := opInt(z, v, "-"); v := z |
||
673 | |tBOOLEAN: v.bool := ~v.bool |
||
674 | END |
||
675 | |||
676 | RETURN res |
||
677 | END neg; |
||
678 | |||
679 | |||
680 | PROCEDURE setbool* (VAR v: VALUE; b: BOOLEAN); |
||
681 | BEGIN |
||
682 | v.bool := b; |
||
683 | v.typ := tBOOLEAN |
||
684 | END setbool; |
||
685 | |||
686 | |||
687 | PROCEDURE opBoolean* (VAR a: VALUE; b: VALUE; op: CHAR); |
||
688 | BEGIN |
||
689 | CASE op OF |
||
690 | |"&": a.bool := a.bool & b.bool |
||
691 | |"|": a.bool := a.bool OR b.bool |
||
692 | END; |
||
693 | a.typ := tBOOLEAN |
||
694 | END opBoolean; |
||
695 | |||
696 | |||
697 | PROCEDURE range* (i: VALUE; a, b: INTEGER): BOOLEAN; |
||
698 | RETURN (a <= i.int) & (i.int <= b) |
||
699 | END range; |
||
700 | |||
701 | |||
702 | PROCEDURE less (v, v2: VALUE; VAR error: INTEGER): BOOLEAN; |
||
703 | VAR |
||
704 | res: BOOLEAN; |
||
705 | |||
706 | BEGIN |
||
707 | res := FALSE; |
||
708 | |||
709 | IF (v.typ = v2.typ) OR (v.typ IN {tCHAR, tWCHAR}) & (v2.typ IN {tCHAR, tWCHAR}) THEN |
||
710 | CASE v.typ OF |
||
711 | |tINTEGER, |
||
712 | tWCHAR, |
||
713 | tCHAR: res := v.int < v2.int |
||
714 | |tREAL: res := v.float < v2.float |
||
715 | |tBOOLEAN, |
||
716 | tSET: error := 1 |
||
717 | END |
||
718 | ELSE |
||
719 | error := 1 |
||
720 | END |
||
721 | |||
722 | RETURN res |
||
723 | END less; |
||
724 | |||
725 | |||
726 | PROCEDURE equal (v, v2: VALUE; VAR error: INTEGER): BOOLEAN; |
||
727 | VAR |
||
728 | res: BOOLEAN; |
||
729 | |||
730 | BEGIN |
||
731 | res := FALSE; |
||
732 | |||
733 | IF (v.typ = v2.typ) OR (v.typ IN {tCHAR, tWCHAR}) & (v2.typ IN {tCHAR, tWCHAR}) THEN |
||
734 | CASE v.typ OF |
||
735 | |tINTEGER, |
||
736 | tWCHAR, |
||
737 | tCHAR: res := v.int = v2.int |
||
738 | |tREAL: res := v.float = v2.float |
||
739 | |tBOOLEAN: res := v.bool = v2.bool |
||
740 | |tSET: res := v.set = v2.set |
||
741 | END |
||
742 | ELSE |
||
743 | error := 1 |
||
744 | END |
||
745 | |||
746 | RETURN res |
||
747 | END equal; |
||
748 | |||
749 | |||
750 | PROCEDURE relation* (VAR v: VALUE; v2: VALUE; operator: RELATION; VAR error: INTEGER); |
||
751 | VAR |
||
752 | res: BOOLEAN; |
||
753 | |||
754 | BEGIN |
||
755 | error := 0; |
||
756 | |||
757 | res := FALSE; |
||
758 | |||
759 | CASE operator[0] OF |
||
760 | |||
761 | |"=": |
||
762 | res := equal(v, v2, error) |
||
763 | |||
764 | |"#": |
||
765 | res := ~equal(v, v2, error) |
||
766 | |||
767 | |"<": |
||
768 | IF operator[1] = "=" THEN |
||
769 | res := less(v, v2, error); |
||
770 | IF error = 0 THEN |
||
771 | res := equal(v, v2, error) OR res |
||
772 | END |
||
773 | ELSE |
||
774 | res := less(v, v2, error) |
||
775 | END |
||
776 | |||
777 | |">": |
||
778 | IF operator[1] = "=" THEN |
||
779 | res := ~less(v, v2, error) |
||
780 | ELSE |
||
781 | res := less(v, v2, error); |
||
782 | IF error = 0 THEN |
||
783 | res := equal(v, v2, error) OR res |
||
784 | END; |
||
785 | res := ~res |
||
786 | END |
||
787 | |||
788 | |"I": |
||
789 | IF (v.typ = tINTEGER) & (v2.typ = tSET) THEN |
||
790 | IF range(v, 0, MACHINE.target.maxSet) THEN |
||
791 | res := v.int IN v2.set |
||
792 | ELSE |
||
793 | error := 2 |
||
794 | END |
||
795 | ELSE |
||
796 | error := 1 |
||
797 | END |
||
798 | |||
799 | END; |
||
800 | |||
801 | IF error = 0 THEN |
||
802 | v.bool := res; |
||
803 | v.typ := tBOOLEAN |
||
804 | END |
||
805 | |||
806 | END relation; |
||
807 | |||
808 | |||
809 | PROCEDURE emptySet* (VAR v: VALUE); |
||
810 | BEGIN |
||
811 | v.typ := tSET; |
||
812 | v.set := {} |
||
813 | END emptySet; |
||
814 | |||
815 | |||
816 | PROCEDURE constrSet* (VAR v: VALUE; a, b: VALUE); |
||
817 | BEGIN |
||
818 | v.typ := tSET; |
||
819 | v.set := {a.int .. b.int} |
||
820 | END constrSet; |
||
821 | |||
822 | |||
823 | PROCEDURE getInt* (v: VALUE): INTEGER; |
||
824 | BEGIN |
||
825 | ASSERT(check(v)) |
||
826 | |||
827 | RETURN v.int |
||
828 | END getInt; |
||
829 | |||
830 | |||
831 | PROCEDURE setInt* (VAR v: VALUE; i: INTEGER): BOOLEAN; |
||
832 | BEGIN |
||
833 | v.int := i; |
||
834 | v.typ := tINTEGER |
||
835 | |||
836 | RETURN check(v) |
||
837 | END setInt; |
||
838 | |||
839 | |||
840 | PROCEDURE init; |
||
841 | VAR |
||
842 | i: INTEGER; |
||
843 | |||
844 | BEGIN |
||
845 | FOR i := 0 TO LEN(digit) - 1 DO |
||
846 | digit[i] := -1 |
||
847 | END; |
||
848 | |||
849 | FOR i := ORD("0") TO ORD("9") DO |
||
850 | digit[i] := i - ORD("0") |
||
851 | END; |
||
852 | |||
853 | FOR i := ORD("A") TO ORD("F") DO |
||
854 | digit[i] := i - ORD("A") + 10 |
||
855 | END |
||
856 | END init; |
||
857 | |||
858 | |||
859 | BEGIN |
||
860 | init |
||
861 | END ARITH.": |