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Rev | Author | Line No. | Line |
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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 | |||
7693 | akron1 | 10 | IMPORT AVLTREES, STRINGS, UTILS; |
7597 | akron1 | 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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7693 | akron1 | 56 | res := UTILS.Long(ORD(v.set)) |
7597 | akron1 | 57 | ELSIF v.typ = tBOOLEAN THEN |
58 | res := ORD(v.bool) |
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59 | END |
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60 | |||
61 | RETURN res |
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62 | END Int; |
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63 | |||
64 | |||
65 | PROCEDURE getBool* (v: VALUE): BOOLEAN; |
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66 | BEGIN |
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67 | ASSERT(v.typ = tBOOLEAN); |
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68 | |||
69 | RETURN v.bool |
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70 | END getBool; |
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71 | |||
72 | |||
73 | PROCEDURE Float* (v: VALUE): REAL; |
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74 | BEGIN |
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75 | ASSERT(v.typ = tREAL); |
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76 | |||
77 | RETURN v.float |
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78 | END Float; |
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79 | |||
80 | |||
81 | PROCEDURE check* (v: VALUE): BOOLEAN; |
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82 | VAR |
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83 | error: BOOLEAN; |
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84 | |||
85 | BEGIN |
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86 | error := FALSE; |
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87 | |||
7693 | akron1 | 88 | IF (v.typ = tINTEGER) & ((v.int < UTILS.target.minInt) OR (v.int > UTILS.target.maxInt)) THEN |
7597 | akron1 | 89 | error := TRUE |
90 | ELSIF (v.typ = tCHAR) & ((v.int < 0) OR (v.int > 255)) THEN |
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91 | error := TRUE |
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92 | ELSIF (v.typ = tWCHAR) & ((v.int < 0) OR (v.int > 65535)) THEN |
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93 | error := TRUE |
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7693 | akron1 | 94 | ELSIF (v.typ = tREAL) & ((v.float < -UTILS.target.maxReal) OR (v.float > UTILS.target.maxReal)) THEN |
7597 | akron1 | 95 | error := TRUE |
96 | END |
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97 | |||
98 | RETURN ~error |
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99 | END check; |
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100 | |||
101 | |||
102 | PROCEDURE isZero* (v: VALUE): BOOLEAN; |
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103 | VAR |
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104 | res: BOOLEAN; |
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105 | BEGIN |
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106 | ASSERT(v.typ IN {tINTEGER, tREAL}); |
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107 | |||
108 | IF v.typ = tINTEGER THEN |
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109 | res := v.int = 0 |
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110 | ELSIF v.typ = tREAL THEN |
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111 | res := v.float = 0.0 |
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112 | END |
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113 | |||
114 | RETURN res |
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115 | END isZero; |
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116 | |||
117 | |||
118 | PROCEDURE iconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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119 | VAR |
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120 | value: INTEGER; |
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121 | i: INTEGER; |
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122 | d: INTEGER; |
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123 | |||
124 | BEGIN |
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125 | error := 0; |
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126 | value := 0; |
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127 | |||
128 | i := 0; |
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129 | WHILE STRINGS.digit(s[i]) & (error = 0) DO |
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130 | d := digit[ORD(s[i])]; |
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131 | IF value <= (UTILS.maxint - d) DIV 10 THEN |
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132 | value := value * 10 + d; |
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133 | INC(i) |
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134 | ELSE |
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135 | error := 1 |
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136 | END |
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137 | END; |
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138 | |||
139 | IF error = 0 THEN |
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140 | v.int := value; |
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141 | v.typ := tINTEGER; |
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142 | IF ~check(v) THEN |
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143 | error := 1 |
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144 | END |
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145 | END |
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146 | |||
147 | END iconv; |
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148 | |||
149 | |||
150 | PROCEDURE hconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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151 | VAR |
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152 | value: INTEGER; |
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153 | i: INTEGER; |
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154 | n: INTEGER; |
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155 | d: INTEGER; |
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156 | |||
157 | BEGIN |
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158 | ASSERT(STRINGS.digit(s[0])); |
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159 | |||
160 | error := 0; |
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161 | value := 0; |
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162 | |||
163 | n := -1; |
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164 | i := 0; |
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165 | WHILE (s[i] # "H") & (s[i] # "X") & (error = 0) DO |
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166 | |||
167 | d := digit[ORD(s[i])]; |
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168 | IF (n = -1) & (d # 0) THEN |
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169 | n := i |
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170 | END; |
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171 | |||
7693 | akron1 | 172 | IF (n # -1) & (i - n + 1 > UTILS.target.maxHex) THEN |
7597 | akron1 | 173 | error := 2 |
174 | ELSE |
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175 | value := value * 16 + d; |
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176 | INC(i) |
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177 | END |
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178 | |||
179 | END; |
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180 | |||
7693 | akron1 | 181 | value := UTILS.Long(value); |
7597 | akron1 | 182 | |
183 | IF (s[i] = "X") & (n # -1) & (i - n > 4) THEN |
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184 | error := 3 |
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185 | END; |
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186 | |||
187 | IF error = 0 THEN |
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188 | v.int := value; |
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189 | IF s[i] = "X" THEN |
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190 | v.typ := tCHAR; |
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191 | IF ~check(v) THEN |
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192 | v.typ := tWCHAR; |
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193 | IF ~check(v) THEN |
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194 | error := 3 |
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195 | END |
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196 | END |
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197 | ELSE |
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198 | v.typ := tINTEGER; |
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199 | IF ~check(v) THEN |
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200 | error := 2 |
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201 | END |
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202 | END |
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203 | END |
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204 | |||
205 | END hconv; |
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206 | |||
207 | |||
208 | PROCEDURE opFloat2 (VAR a: REAL; b: REAL; op: CHAR): BOOLEAN; |
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209 | VAR |
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210 | max: REAL; |
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211 | res: BOOLEAN; |
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212 | |||
213 | BEGIN |
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214 | max := UTILS.maxreal; |
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215 | |||
216 | CASE op OF |
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217 | |"+": |
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218 | IF (a < 0.0) & (b < 0.0) THEN |
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219 | res := a > -max - b |
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220 | ELSIF (a > 0.0) & (b > 0.0) THEN |
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221 | res := a < max - b |
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222 | ELSE |
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223 | res := TRUE |
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224 | END; |
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225 | IF res THEN |
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226 | a := a + b |
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227 | END |
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228 | |||
229 | |"-": |
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230 | IF (a < 0.0) & (b > 0.0) THEN |
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231 | res := a > b - max |
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232 | ELSIF (a > 0.0) & (b < 0.0) THEN |
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233 | res := a < b + max |
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234 | ELSE |
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235 | res := TRUE |
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236 | END; |
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237 | IF res THEN |
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238 | a := a - b |
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239 | END |
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240 | |||
241 | |"*": |
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242 | IF (ABS(a) > 1.0) & (ABS(b) > 1.0) THEN |
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243 | res := ABS(a) < max / ABS(b) |
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244 | ELSE |
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245 | res := TRUE |
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246 | END; |
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247 | IF res THEN |
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248 | a := a * b |
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249 | END |
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250 | |||
251 | |"/": |
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252 | IF ABS(b) < 1.0 THEN |
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253 | res := ABS(a) < max * ABS(b) |
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254 | ELSE |
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255 | res := TRUE |
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256 | END; |
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257 | IF res THEN |
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258 | a := a / b |
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259 | END |
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260 | |||
261 | END |
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262 | |||
263 | RETURN res |
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264 | END opFloat2; |
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265 | |||
266 | |||
267 | PROCEDURE fconv* (s: ARRAY OF CHAR; VAR v: VALUE; VAR error: INTEGER); |
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268 | VAR |
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269 | value: REAL; |
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270 | exp10: REAL; |
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271 | i, n, d: INTEGER; |
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272 | minus: BOOLEAN; |
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273 | |||
274 | BEGIN |
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275 | error := 0; |
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276 | value := 0.0; |
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277 | exp10 := 10.0; |
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278 | minus := FALSE; |
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279 | n := 0; |
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280 | |||
281 | i := 0; |
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282 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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283 | IF opFloat2(value, 10.0, "*") & opFloat2(value, FLT(digit[ORD(s[i])]), "+") THEN |
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284 | INC(i) |
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285 | ELSE |
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286 | error := 4 |
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287 | END |
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288 | END; |
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289 | |||
290 | INC(i); |
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291 | |||
292 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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293 | IF opFloat2(value, FLT(digit[ORD(s[i])]) / exp10, "+") & opFloat2(exp10, 10.0, "*") THEN |
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294 | INC(i) |
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295 | ELSE |
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296 | error := 4 |
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297 | END |
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298 | END; |
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299 | |||
300 | IF s[i] = "E" THEN |
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301 | INC(i) |
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302 | END; |
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303 | |||
304 | IF (s[i] = "-") OR (s[i] = "+") THEN |
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305 | minus := s[i] = "-"; |
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306 | INC(i) |
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307 | END; |
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308 | |||
309 | WHILE (error = 0) & STRINGS.digit(s[i]) DO |
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310 | d := digit[ORD(s[i])]; |
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311 | IF n <= (UTILS.maxint - d) DIV 10 THEN |
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312 | n := n * 10 + d; |
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313 | INC(i) |
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314 | ELSE |
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315 | error := 5 |
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316 | END |
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317 | END; |
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318 | |||
319 | exp10 := 1.0; |
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320 | WHILE (error = 0) & (n > 0) DO |
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321 | IF opFloat2(exp10, 10.0, "*") THEN |
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322 | DEC(n) |
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323 | ELSE |
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324 | error := 4 |
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325 | END |
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326 | END; |
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327 | |||
328 | IF error = 0 THEN |
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329 | IF minus THEN |
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330 | IF ~opFloat2(value, exp10, "/") THEN |
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331 | error := 4 |
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332 | END |
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333 | ELSE |
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334 | IF ~opFloat2(value, exp10, "*") THEN |
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335 | error := 4 |
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336 | END |
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337 | END |
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338 | END; |
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339 | |||
340 | IF error = 0 THEN |
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341 | v.float := value; |
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342 | v.typ := tREAL; |
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343 | IF ~check(v) THEN |
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344 | error := 4 |
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345 | END |
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346 | END |
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347 | |||
348 | END fconv; |
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349 | |||
350 | |||
351 | PROCEDURE setChar* (VAR v: VALUE; ord: INTEGER); |
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352 | BEGIN |
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353 | v.typ := tCHAR; |
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354 | v.int := ord |
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355 | END setChar; |
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356 | |||
357 | |||
358 | PROCEDURE setWChar* (VAR v: VALUE; ord: INTEGER); |
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359 | BEGIN |
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360 | v.typ := tWCHAR; |
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361 | v.int := ord |
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362 | END setWChar; |
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363 | |||
364 | |||
365 | PROCEDURE addInt (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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366 | VAR |
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367 | error: BOOLEAN; |
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368 | |||
369 | BEGIN |
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370 | IF (a > 0) & (b > 0) THEN |
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371 | error := a > UTILS.maxint - b |
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372 | ELSIF (a < 0) & (b < 0) THEN |
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373 | error := a < UTILS.minint - b |
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374 | ELSE |
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375 | error := FALSE |
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376 | END; |
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377 | |||
378 | IF ~error THEN |
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379 | a := a + b |
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380 | ELSE |
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381 | a := 0 |
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382 | END |
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383 | |||
384 | RETURN ~error |
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385 | END addInt; |
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386 | |||
387 | |||
388 | PROCEDURE subInt (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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389 | VAR |
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390 | error: BOOLEAN; |
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391 | |||
392 | BEGIN |
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393 | IF (a > 0) & (b < 0) THEN |
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394 | error := a > UTILS.maxint + b |
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395 | ELSIF (a < 0) & (b > 0) THEN |
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396 | error := a < UTILS.minint + b |
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397 | ELSIF (a = 0) & (b < 0) THEN |
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398 | error := b = UTILS.minint |
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399 | ELSE |
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400 | error := FALSE |
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401 | END; |
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402 | |||
403 | IF ~error THEN |
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404 | a := a - b |
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405 | ELSE |
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406 | a := 0 |
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407 | END |
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408 | |||
409 | RETURN ~error |
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410 | END subInt; |
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411 | |||
412 | |||
413 | PROCEDURE lg2 (x: INTEGER): INTEGER; |
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414 | VAR |
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415 | n: INTEGER; |
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416 | |||
417 | BEGIN |
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418 | ASSERT(x > 0); |
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419 | |||
420 | n := 0; |
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421 | WHILE ~ODD(x) DO |
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422 | x := x DIV 2; |
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423 | INC(n) |
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424 | END; |
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425 | |||
426 | IF x # 1 THEN |
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427 | n := 255 |
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428 | END |
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429 | |||
430 | RETURN n |
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431 | END lg2; |
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432 | |||
433 | |||
434 | PROCEDURE mulInt* (VAR a: INTEGER; b: INTEGER): BOOLEAN; |
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435 | VAR |
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436 | error: BOOLEAN; |
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437 | min, max: INTEGER; |
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438 | |||
439 | BEGIN |
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440 | min := UTILS.minint; |
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441 | max := UTILS.maxint; |
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442 | |||
443 | IF ((a > 1) & (b > 1)) OR ((a < 0) & (b < 0)) THEN |
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444 | error := (a = min) OR (b = min) OR (ABS(a) > max DIV ABS(b)) |
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445 | |||
446 | ELSIF ((a > 1) & (b < 0)) OR ((a < 0) & (b > 1)) THEN |
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447 | error := (a = min) OR (b = min); |
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448 | IF ~error THEN |
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449 | IF lg2(ABS(a)) + lg2(ABS(b)) >= UTILS.bit_depth THEN |
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450 | error := ABS(a) > max DIV ABS(b) |
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451 | END |
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452 | END |
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453 | |||
454 | ELSE |
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455 | error := FALSE |
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456 | END; |
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457 | |||
458 | IF ~error THEN |
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459 | a := a * b |
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460 | ELSE |
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461 | a := 0 |
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462 | END |
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463 | |||
464 | RETURN ~error |
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465 | END mulInt; |
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466 | |||
467 | |||
468 | PROCEDURE _ASR (x, n: INTEGER): INTEGER; |
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7693 | akron1 | 469 | RETURN ASR(UTILS.Long(x), n) |
7597 | akron1 | 470 | END _ASR; |
471 | |||
472 | |||
473 | PROCEDURE _LSR (x, n: INTEGER): INTEGER; |
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7693 | akron1 | 474 | RETURN UTILS.Long(LSR(UTILS.Short(x), n)) |
7597 | akron1 | 475 | END _LSR; |
476 | |||
477 | |||
478 | PROCEDURE _LSL (x, n: INTEGER): INTEGER; |
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7693 | akron1 | 479 | RETURN UTILS.Long(LSL(x, n)) |
7597 | akron1 | 480 | END _LSL; |
481 | |||
482 | |||
483 | PROCEDURE _ROR1_32 (x: INTEGER): INTEGER; |
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484 | BEGIN |
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7693 | akron1 | 485 | x := UTILS.Short(x); |
7597 | akron1 | 486 | x := ORD(BITS(LSR(x, 1)) + BITS(LSL(x, 31))) |
7693 | akron1 | 487 | RETURN UTILS.Long(x) |
7597 | akron1 | 488 | END _ROR1_32; |
489 | |||
490 | |||
7693 | akron1 | 491 | PROCEDURE _ROR1_16 (x: INTEGER): INTEGER; |
492 | BEGIN |
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493 | x := x MOD 65536; |
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494 | x := ORD(BITS(LSR(x, 1)) + BITS(LSL(x, 15))) |
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495 | RETURN UTILS.Long(x) |
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496 | END _ROR1_16; |
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497 | |||
498 | |||
7597 | akron1 | 499 | PROCEDURE _ROR (x, n: INTEGER): INTEGER; |
500 | BEGIN |
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7693 | akron1 | 501 | |
502 | CASE UTILS.bit_diff OF |
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503 | |0: x := ROR(x, n) |
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504 | |16, 48: |
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505 | n := n MOD 16; |
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506 | WHILE n > 0 DO |
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507 | x := _ROR1_16(x); |
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508 | DEC(n) |
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509 | END |
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510 | |32: |
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7597 | akron1 | 511 | n := n MOD 32; |
512 | WHILE n > 0 DO |
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513 | x := _ROR1_32(x); |
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514 | DEC(n) |
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515 | END |
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516 | END |
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517 | |||
518 | RETURN x |
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519 | END _ROR; |
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520 | |||
521 | |||
522 | PROCEDURE opInt* (VAR a: VALUE; b: VALUE; op: CHAR): BOOLEAN; |
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523 | VAR |
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524 | success: BOOLEAN; |
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525 | |||
526 | BEGIN |
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527 | success := TRUE; |
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528 | |||
529 | CASE op OF |
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530 | |"+": success := addInt(a.int, b.int) |
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531 | |"-": success := subInt(a.int, b.int) |
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532 | |"*": success := mulInt(a.int, b.int) |
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533 | |"/": success := FALSE |
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534 | |"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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535 | |"M": a.int := a.int MOD b.int |
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536 | |"L": a.int := _LSL(a.int, b.int) |
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537 | |"A": a.int := _ASR(a.int, b.int) |
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538 | |"O": a.int := _ROR(a.int, b.int) |
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539 | |"R": a.int := _LSR(a.int, b.int) |
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540 | |"m": a.int := MIN(a.int, b.int) |
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541 | |"x": a.int := MAX(a.int, b.int) |
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542 | END; |
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543 | a.typ := tINTEGER |
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544 | |||
545 | RETURN success & check(a) |
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546 | END opInt; |
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547 | |||
548 | |||
549 | PROCEDURE charToStr* (c: VALUE; VAR s: ARRAY OF CHAR); |
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550 | BEGIN |
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551 | s[0] := CHR(c.int); |
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552 | s[1] := 0X |
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553 | END charToStr; |
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554 | |||
555 | |||
556 | PROCEDURE opSet* (VAR a: VALUE; b: VALUE; op: CHAR); |
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557 | BEGIN |
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558 | CASE op OF |
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559 | |"+": a.set := a.set + b.set |
||
560 | |"-": a.set := a.set - b.set |
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561 | |"*": a.set := a.set * b.set |
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562 | |"/": a.set := a.set / b.set |
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563 | END; |
||
564 | a.typ := tSET |
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565 | END opSet; |
||
566 | |||
567 | |||
568 | PROCEDURE opFloat* (VAR a: VALUE; b: VALUE; op: CHAR): BOOLEAN; |
||
569 | BEGIN |
||
570 | a.typ := tREAL |
||
571 | RETURN opFloat2(a.float, b.float, op) & check(a) |
||
572 | END opFloat; |
||
573 | |||
574 | |||
575 | PROCEDURE ord* (VAR v: VALUE); |
||
576 | BEGIN |
||
577 | CASE v.typ OF |
||
578 | |tCHAR, tWCHAR: |
||
579 | |tBOOLEAN: v.int := ORD(v.bool) |
||
7693 | akron1 | 580 | |tSET: v.int := UTILS.Long(ORD(v.set)) |
7597 | akron1 | 581 | END; |
582 | v.typ := tINTEGER |
||
583 | END ord; |
||
584 | |||
585 | |||
586 | PROCEDURE odd* (VAR v: VALUE); |
||
587 | BEGIN |
||
588 | v.typ := tBOOLEAN; |
||
589 | v.bool := ODD(v.int) |
||
590 | END odd; |
||
591 | |||
592 | |||
593 | PROCEDURE bits* (VAR v: VALUE); |
||
594 | BEGIN |
||
595 | v.typ := tSET; |
||
596 | v.set := BITS(v.int) |
||
597 | END bits; |
||
598 | |||
599 | |||
600 | PROCEDURE abs* (VAR v: VALUE): BOOLEAN; |
||
601 | VAR |
||
602 | res: BOOLEAN; |
||
603 | |||
604 | BEGIN |
||
7693 | akron1 | 605 | res := FALSE; |
7597 | akron1 | 606 | |
607 | CASE v.typ OF |
||
608 | |tREAL: |
||
609 | v.float := ABS(v.float); |
||
610 | res := TRUE |
||
611 | |tINTEGER: |
||
612 | IF v.int # UTILS.minint THEN |
||
613 | v.int := ABS(v.int); |
||
614 | res := TRUE |
||
615 | END |
||
7693 | akron1 | 616 | END |
617 | |||
7597 | akron1 | 618 | RETURN res |
619 | END abs; |
||
620 | |||
621 | |||
622 | PROCEDURE floor* (VAR v: VALUE): BOOLEAN; |
||
623 | VAR |
||
624 | res: BOOLEAN; |
||
625 | |||
626 | BEGIN |
||
627 | v.typ := tINTEGER; |
||
628 | res := (FLT(UTILS.minint) <= v.float) & (v.float <= FLT(UTILS.maxint)); |
||
629 | IF res THEN |
||
630 | v.int := FLOOR(v.float) |
||
631 | END |
||
632 | |||
633 | RETURN res |
||
634 | END floor; |
||
635 | |||
636 | |||
637 | PROCEDURE flt* (VAR v: VALUE); |
||
638 | BEGIN |
||
639 | v.typ := tREAL; |
||
640 | v.float := FLT(v.int) |
||
641 | END flt; |
||
642 | |||
643 | |||
644 | PROCEDURE neg* (VAR v: VALUE): BOOLEAN; |
||
645 | VAR |
||
646 | z: VALUE; |
||
647 | res: BOOLEAN; |
||
648 | |||
649 | BEGIN |
||
650 | res := TRUE; |
||
651 | |||
652 | z.typ := tINTEGER; |
||
653 | z.int := 0; |
||
654 | |||
655 | CASE v.typ OF |
||
656 | |tREAL: v.float := -v.float |
||
657 | |tSET: v.set := -v.set |
||
658 | |tINTEGER: res := opInt(z, v, "-"); v := z |
||
659 | |tBOOLEAN: v.bool := ~v.bool |
||
660 | END |
||
661 | |||
662 | RETURN res |
||
663 | END neg; |
||
664 | |||
665 | |||
666 | PROCEDURE setbool* (VAR v: VALUE; b: BOOLEAN); |
||
667 | BEGIN |
||
668 | v.bool := b; |
||
669 | v.typ := tBOOLEAN |
||
670 | END setbool; |
||
671 | |||
672 | |||
673 | PROCEDURE opBoolean* (VAR a: VALUE; b: VALUE; op: CHAR); |
||
674 | BEGIN |
||
675 | CASE op OF |
||
676 | |"&": a.bool := a.bool & b.bool |
||
677 | |"|": a.bool := a.bool OR b.bool |
||
678 | END; |
||
679 | a.typ := tBOOLEAN |
||
680 | END opBoolean; |
||
681 | |||
682 | |||
683 | PROCEDURE range* (i: VALUE; a, b: INTEGER): BOOLEAN; |
||
684 | RETURN (a <= i.int) & (i.int <= b) |
||
685 | END range; |
||
686 | |||
687 | |||
688 | PROCEDURE less (v, v2: VALUE; VAR error: INTEGER): BOOLEAN; |
||
689 | VAR |
||
690 | res: BOOLEAN; |
||
691 | |||
692 | BEGIN |
||
693 | res := FALSE; |
||
694 | |||
695 | IF (v.typ = v2.typ) OR (v.typ IN {tCHAR, tWCHAR}) & (v2.typ IN {tCHAR, tWCHAR}) THEN |
||
696 | CASE v.typ OF |
||
697 | |tINTEGER, |
||
698 | tWCHAR, |
||
699 | tCHAR: res := v.int < v2.int |
||
700 | |tREAL: res := v.float < v2.float |
||
701 | |tBOOLEAN, |
||
702 | tSET: error := 1 |
||
703 | END |
||
704 | ELSE |
||
705 | error := 1 |
||
706 | END |
||
707 | |||
708 | RETURN res |
||
709 | END less; |
||
710 | |||
711 | |||
712 | PROCEDURE equal (v, v2: VALUE; VAR error: INTEGER): BOOLEAN; |
||
713 | VAR |
||
714 | res: BOOLEAN; |
||
715 | |||
716 | BEGIN |
||
717 | res := FALSE; |
||
718 | |||
719 | IF (v.typ = v2.typ) OR (v.typ IN {tCHAR, tWCHAR}) & (v2.typ IN {tCHAR, tWCHAR}) THEN |
||
720 | CASE v.typ OF |
||
721 | |tINTEGER, |
||
722 | tWCHAR, |
||
723 | tCHAR: res := v.int = v2.int |
||
724 | |tREAL: res := v.float = v2.float |
||
725 | |tBOOLEAN: res := v.bool = v2.bool |
||
726 | |tSET: res := v.set = v2.set |
||
727 | END |
||
728 | ELSE |
||
729 | error := 1 |
||
730 | END |
||
731 | |||
732 | RETURN res |
||
733 | END equal; |
||
734 | |||
735 | |||
736 | PROCEDURE relation* (VAR v: VALUE; v2: VALUE; operator: RELATION; VAR error: INTEGER); |
||
737 | VAR |
||
738 | res: BOOLEAN; |
||
739 | |||
740 | BEGIN |
||
741 | error := 0; |
||
742 | |||
743 | res := FALSE; |
||
744 | |||
745 | CASE operator[0] OF |
||
746 | |||
747 | |"=": |
||
748 | res := equal(v, v2, error) |
||
749 | |||
750 | |"#": |
||
751 | res := ~equal(v, v2, error) |
||
752 | |||
753 | |"<": |
||
754 | IF operator[1] = "=" THEN |
||
755 | res := less(v, v2, error); |
||
756 | IF error = 0 THEN |
||
757 | res := equal(v, v2, error) OR res |
||
758 | END |
||
759 | ELSE |
||
760 | res := less(v, v2, error) |
||
761 | END |
||
762 | |||
763 | |">": |
||
764 | IF operator[1] = "=" THEN |
||
765 | res := ~less(v, v2, error) |
||
766 | ELSE |
||
767 | res := less(v, v2, error); |
||
768 | IF error = 0 THEN |
||
769 | res := equal(v, v2, error) OR res |
||
770 | END; |
||
771 | res := ~res |
||
772 | END |
||
773 | |||
774 | |"I": |
||
775 | IF (v.typ = tINTEGER) & (v2.typ = tSET) THEN |
||
7693 | akron1 | 776 | IF range(v, 0, UTILS.target.maxSet) THEN |
7597 | akron1 | 777 | res := v.int IN v2.set |
778 | ELSE |
||
779 | error := 2 |
||
780 | END |
||
781 | ELSE |
||
782 | error := 1 |
||
783 | END |
||
784 | |||
785 | END; |
||
786 | |||
787 | IF error = 0 THEN |
||
788 | v.bool := res; |
||
789 | v.typ := tBOOLEAN |
||
790 | END |
||
791 | |||
792 | END relation; |
||
793 | |||
794 | |||
795 | PROCEDURE emptySet* (VAR v: VALUE); |
||
796 | BEGIN |
||
797 | v.typ := tSET; |
||
798 | v.set := {} |
||
799 | END emptySet; |
||
800 | |||
801 | |||
802 | PROCEDURE constrSet* (VAR v: VALUE; a, b: VALUE); |
||
803 | BEGIN |
||
804 | v.typ := tSET; |
||
805 | v.set := {a.int .. b.int} |
||
806 | END constrSet; |
||
807 | |||
808 | |||
809 | PROCEDURE getInt* (v: VALUE): INTEGER; |
||
810 | BEGIN |
||
811 | ASSERT(check(v)) |
||
812 | |||
813 | RETURN v.int |
||
814 | END getInt; |
||
815 | |||
816 | |||
817 | PROCEDURE setInt* (VAR v: VALUE; i: INTEGER): BOOLEAN; |
||
818 | BEGIN |
||
819 | v.int := i; |
||
820 | v.typ := tINTEGER |
||
821 | |||
822 | RETURN check(v) |
||
823 | END setInt; |
||
824 | |||
825 | |||
826 | PROCEDURE init; |
||
827 | VAR |
||
828 | i: INTEGER; |
||
829 | |||
830 | BEGIN |
||
831 | FOR i := 0 TO LEN(digit) - 1 DO |
||
832 | digit[i] := -1 |
||
833 | END; |
||
834 | |||
835 | FOR i := ORD("0") TO ORD("9") DO |
||
836 | digit[i] := i - ORD("0") |
||
837 | END; |
||
838 | |||
839 | FOR i := ORD("A") TO ORD("F") DO |
||
840 | digit[i] := i - ORD("A") + 10 |
||
841 | END |
||
842 | END init; |
||
843 | |||
844 | |||
845 | BEGIN |
||
846 | init |
||
847 | END ARITH.": |