99
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1
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2 #define DEBUG error(-1)
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3
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4 /*#include "CCLIB.TXT"
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5 */
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6 #include <stdio.h>
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7
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8 #define INT (-1)
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9 #define CHAR (-2)
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10 #define UNSIGNED (-3)
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11 #define POINTER (-4)
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12 #define ARRAY (-5)
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13 #define STRUCT (-6)
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14 #define UNION (-7)
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15 #define FUNCTION (-8)
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16 #define EMPTY (-9)
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17
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18 #define STATIC (-10)
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19 #define GOTO (-11)
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20 #define RETURN (-12)
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21 #define BREAK (-13)
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22 #define CONTINUE (-14)
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23 #define IF (-15)
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24 #define ELSE (-16)
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25 #define FOR (-17)
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26 #define DO (-18)
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27 #define WHILE (-19)
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28 #define SWITCH (-20)
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29 #define CASE (-21)
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30 #define DEFAULT (-22)
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31 #define RESERVE (-23)
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32 #define TAG (-24)
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33 #define FIELD (-25)
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34 #define IDENT (-26)
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35 #define STRING (-27)
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36 #define MACRO (-28)
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37 #define BLABEL (-29)
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38 #define FLABEL (-30)
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39 #define TYPEDEF (-31)
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40 #define SIZEOF (-32)
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41 #define TYPE (-33)
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42 #define LONG (-34)
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43 #define SHORT (-35)
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44
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45 #define TOP 0
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46 #define GDECL 1
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47 #define GSDECL 2
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48 #define GUDECL 3
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49 #define ADECL 4
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50 #define LDECL 5
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51 #define LSDECL 6
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52 #define LUDECL 7
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53 #define STADECL 8
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54 #define STAT 9
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55 #define GTDECL 10
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56 #define LTDECL 11
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57
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58 #define GVAR 1
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59 #define RGVAR 2
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60 #define CRGVAR 3
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61 #define LVAR 4
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62 #define RLVAR 5
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63 #define CRLVAR 6
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64 #define CONST 7
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65 #define FNAME 8
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66 #define INDIRECT 9
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67 #define RINDIRECT 10
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68 #define CRINDIRECT 11
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69 #define ADDRESS 12
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70 #define MINUS 13
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71 #define LNOT 14
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72 #define BNOT 15
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73 #define INC 16
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74 #define POSTINC 17
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75 #define PREINC 18
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76 #define CPOSTINC 19
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77 #define CPREINC 20
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78 #define DEC 21
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79 #define CPOSTDEC 22
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80 #define CPREDEC 23
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81 #define MUL 24
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82 #define UMUL 25
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83 #define DIV 26
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84 #define UDIV 27
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85 #define MOD 28
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86 #define UMOD 29
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87 #define ADD 30
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88 #define SUB 31
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89 #define RSHIFT 32
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90 #define URSHIFT 33
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91 #define LSHIFT 34
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92 #define ULSHIFT 35
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93 #define GT 36
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94 #define UGT 37
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95 #define GE 38
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96 #define UGE 39
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97 #define LT 40
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98 #define ULT 41
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99 #define LE 42
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100 #define ULE 43
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101 #define EQ 44
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102 #define NEQ 45
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103 #define BAND 46
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104 #define EOR 47
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105 #define BOR 48
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106 #define LAND 49
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107 #define LOR 50
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108 #define COND 51
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109 #define ASS 52
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110 #define CASS 53
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111 #define ASSOP 54
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112 #define CASSOP 55
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113 #define COMMA 56
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114 #define LPAR 57
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115 #define RPAR 58
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116 #define LBRA 59
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117 #define RBRA 60
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118 #define LC 61
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119 #define RC 62
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120 #define COLON 63
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121 #define SM 64
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122 #define PERIOD 65
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123 #define ARROW 66
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124
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125 #define US 1
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126 #define AS 100
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127
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128 #define FILERR 1
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129 #define DCERR 2
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130 #define STERR 3
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131 #define EXERR 4
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132 #define CNERR 5
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133 #define CHERR 6
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134 #define GSERR 7
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135 #define LSERR 8
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136 #define STRERR 9
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137 #define LNERR 10
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138 #define EOFERR 11
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139 #define MCERR 12
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140 #define INCERR 13
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141 #define HPERR 14
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142 #define TYERR 15
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143 #define LVERR 16
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144 #define UDERR 17
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145 #define OPTION 18
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146
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147 #define GSYMS 450
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148 #define LSYMS 50
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149
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150 #define HEAPSIZE 1000
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151 #define CHEAPSIZE 3000
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152 #define LBUFSIZE 256
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153
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154 #define FILES 3
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155
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156 int sym,ch,chsave,type,mode,gfree,lfree,mflag,lineno,glineno;
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157 int labelno,gpc,lvar,disp;
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158 int symval,args,heap[HEAPSIZE];
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159 int blabel,clabel,dlabel,cslabel,ilabel,control,ac,ac2,lsrc,chk,asmf;
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160
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161 unsigned hash;
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162
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163 char linebuf[LBUFSIZE],cheap[CHEAPSIZE],*chptr,*chptrsave;
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164 char name[9],*cheapp,**av,/*obuf[320],*/*sptr,escape();
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165
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166 FILE *obuf;
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167
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168 typedef struct nametable {
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169 char nm[9];
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170 int sc,ty,dsp; } NMTBL;
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171
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172 NMTBL ntable[GSYMS+LSYMS],*nptr,*gnptr,*decl0(),*decl1(),*lsearch(),*gsearch();
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173
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174 struct {int fd,ln;/*char fcb[320]*/FILE *fcb;} *filep,filestack[FILES];
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175
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176 main(argc,argv)
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177 int argc;
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178 char **argv;
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179 {NMTBL *nptr;
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180 int i;
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181 char *ccout;
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182 if(argc==1) exit(1);
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183 lsrc = chk = asmf = 0;
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184 ccout = "c.out";
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185 ac=argc;
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186 av=argv;
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187 for (ac2=1; (ac2 < ac) && (*av[ac2] == '-'); ++ac2)
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188 switch (*(av[ac2]+1))
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189 {case 'S': case 's':
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190 lsrc = 1;
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191 break;
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192 case 'O': case 'o':
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193 ccout = av[ac2]+2;
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194 break;
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195 case 'C': case 'c':
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196 chk = 1;
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197 break;
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198 default:
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199 error(OPTION);
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200 exit(1);
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201 }
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202 fclose(stdout);
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203 if (!chk)
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204 if ( (obuf = fopen(ccout,"w")) == NULL ) error(FILERR);
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205 init();
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206 while(1)
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207 { for (nptr = &ntable[GSYMS],i=LSYMS; i--;)
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208 (nptr++)->sc = EMPTY;
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209 mode=TOP;
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210 while(getsym()==SM);
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211 mode=GDECL;
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212 args=0;
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213 decl();
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214 }
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215 }
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216 error(n)
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217 int n;
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218 { if(n == EOFERR)
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219 if(filep!=filestack)
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220 { lineno=filep->ln;
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221 fclose(filep->fcb);
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222 fprintf(stderr,"End of inclusion.\n");
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223 --filep;
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224 return;
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225 }
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226 else if(ac2!=ac)
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227 { fclose(filep->fcb);
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228 newfile();
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229 return;
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230 }
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231 else if(mode == TOP)
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232 { fprintf(stderr,"\nCompiled %u lines.\n",glineno-1);
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233 if (!chk) fprintf(stderr,
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234 "Total internal labels : %u.\n",labelno-1);
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235 fprintf(stderr,
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236 "Total global variables : %u bytes.\n\n",gpc);
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237 printf("_%d\tRTS\n_INITIALIZE\tEQU\t_1\n",ilabel);
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238 printf("_GLOBALS\tEQU\t%u\n\tEND\n",gpc);
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239 exit(0);
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240 }
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241 fprintf(stderr,"%5d:%s.\n",lineno,
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242 (n==FILERR) ? "Can't open specified file" :
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243 (n==DCERR) ? "Declaration syntax" :
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244 (n==STERR) ? "Statement syntax" :
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245 (n==EXERR) ? "Expression syntax" :
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246 (n==CNERR) ? "Constant required" :
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247 (n==CHERR) ? "Illegal character" :
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248 (n==GSERR) ? "Too many global symbols" :
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249 (n==LSERR) ? "Too many local symbols" :
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250 (n==STRERR) ? "Too many strings or macros" :
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251 (n==LNERR) ? "Line too long" :
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252 (n==EOFERR) ? "Unexpected end of file" :
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253 (n==MCERR) ? "Macro syntax" :
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254 (n==INCERR) ? "Include syntax" :
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255 (n==HPERR) ? "Too long expression" :
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256 (n==TYERR) ? "Type mismatch" :
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257 (n==LVERR) ? "Lvalue required" :
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258 (n==UDERR) ? "Undeclared identifier" :
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259 (n==OPTION) ? "Illegal option" :
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260 "Bug of compiler");
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261 errmsg();
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262 exit(1);
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263 }
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264 errmsg()
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265 {char *p,*lim;
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266 if(lineno==0) return;
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267 fprintf(stderr,"%s",linebuf);
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268 lim=(mflag?chptrsave:chptr);
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269 for (p=linebuf; p < lim;)
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270 fprintf(stderr,(*p++ == '\t') ? "\t" : " ");
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271 fprintf (stderr,"^\n");
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272 }
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273 checksym(s)
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274 int s;
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275 {char *p;
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276 if (sym != s)
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277 { p=(s==RPAR) ? "')'": (s==RBRA) ? "']'": (s==SM) ? "';'":
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278 (s==LPAR) ? "'('": (s==WHILE) ? "'while'":
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279 (s==COLON) ? "':'": "Identifier";
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280 fprintf(stderr,"%d:%s expected.\n",lineno,p);
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281 errmsg();
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282 }
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283 else getsym();
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284 }
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285 init()
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286 {NMTBL *nptr;
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287 int i;
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288 for(nptr = ntable,i = GSYMS; i--;) (nptr++)->sc = EMPTY;
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289 reserve("int",INT);
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290 reserve("void",INT);
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291 reserve("char",CHAR);
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292 reserve("struct",STRUCT);
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293 reserve("union",UNION);
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294 reserve("unsigned",UNSIGNED);
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295 reserve("static",STATIC);
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296 reserve("goto",GOTO);
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297 reserve("return",RETURN);
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298 reserve("break",BREAK);
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299 reserve("continue",CONTINUE);
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300 reserve("if",IF);
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301 reserve("else",ELSE);
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302 reserve("for",FOR);
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303 reserve("do",DO);
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304 reserve("while",WHILE);
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305 reserve("switch",SWITCH);
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306 reserve("case",CASE);
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307 reserve("default",DEFAULT);
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308 reserve("typedef",TYPEDEF);
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309 reserve("sizeof",SIZEOF);
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310 reserve("long",LONG);
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311 reserve("short",SHORT);
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312 gpc=glineno=mflag=0;
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313 gfree=ilabel=1;
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314 labelno=2;
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315 cheapp=cheap;
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316 lfree=HEAPSIZE;
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317 filep=filestack;
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318 newfile();
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319 getline();
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320 getch();
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321 }
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322 newfile()
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323 { lineno=0;
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324 fprintf(stderr,"%s:\n",av[ac2]);
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325 if ( (filep->fcb = fopen(av[ac2++],"r")) == NULL ) error(FILERR);
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326 }
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327 reserve(s,d)
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328 char *s;
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329 int d;
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330 {NMTBL *nptr;
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331 char *t;
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332 hash=0;
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333 t=name;
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334 while(*t++ = *s) hash=7*(hash+*s++);
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335 (nptr = gsearch())->sc = RESERVE;
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336 nptr->dsp = d;
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337 }
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338
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339 decl()
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340 {NMTBL *n;
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341 int t;
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342 if(sym==STATIC)
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343 if(mode==LDECL)
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344 { getsym();
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345 mode=STADECL;
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346 }
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347 else error(DCERR);
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348 else if(sym==TYPEDEF)
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349 if(mode==GDECL)
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350 { getsym();
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351 mode=GTDECL;
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352 }
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353 else if(mode==LDECL)
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354 { getsym();
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355 mode=LTDECL;
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356 }
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357 else error(DCERR);
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358 if((t=typespec())==0) return;
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359 if(sym==SM) return;
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360 type=t;
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361 n=decl0();
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362 reverse(t);
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363 if(args||sym==LC) {fdecl(n);return;}
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364 def(n);
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365 while(sym==COMMA)
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366 { getsym();
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367 type=t;
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368 n=decl0();
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369 reverse(t);
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370 if(args) error(DCERR);
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371 def(n);
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372 }
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373 if(sym!=SM) error(DCERR);
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374 if(mode==GTDECL) mode=GDECL;
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375 if(mode==STADECL||mode==LTDECL) mode=LDECL;
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376 }
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377 typespec()
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378 {int t;
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379 switch(sym)
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380 {case INT:
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381 case CHAR:
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382 t= sym;
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383 getsym();
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384 break;
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385 case STRUCT:
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386 case UNION:
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387 t=sdecl(sym);
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388 break;
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389 case UNSIGNED:
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390 t = UNSIGNED;
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391 if(getsym()==INT) getsym();
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392 break;
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393 case SHORT:
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394 t=CHAR;
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395 if(getsym()==INT) getsym();
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396 break;
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397 case LONG:
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398 t=INT;
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399 if(getsym()==INT) getsym();
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400 break;
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401 default:
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402 if(sym==IDENT)
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403 if(nptr->sc==TYPE)
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404 { t=nptr->ty;
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405 getsym();
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406 break;
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407 }
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408 else if(nptr->sc==EMPTY && gnptr->sc==TYPE)
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409 { t=gnptr->ty;
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410 getsym();
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411 break;
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412 }
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413 if(mode==LDECL) return 0;
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414 t= INT;
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415 }
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416 return t;
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417 }
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418 struct nametable *decl0()
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419 {NMTBL *n;
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420 if(sym==MUL)
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421 { getsym();
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422 n=decl0();
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423 type=list2(POINTER,type);
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424 return n;
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425 }
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426 return decl1();
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427 }
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428 NMTBL *decl1()
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429 {NMTBL *n;
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430 int i,t;
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431 if(sym==LPAR)
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432 { getsym();
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433 n=decl0();
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434 checksym(RPAR);
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435 }
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436 else if (sym == IDENT)
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437 { n=nptr;
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438 getsym();
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439 }
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440 else error(DCERR);
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441 while(1)
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442 if(sym==LBRA)
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443 if(getsym()==RBRA)
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444 { getsym();
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445 if(mode!=ADECL) error(DCERR);
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446 t=type;
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447 type=list2(POINTER,type);
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448 }
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449 else
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450 { t=type;
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451 i=cexpr(expr());
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452 checksym(RBRA);
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453 type=list3(ARRAY,t,i);
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454 }
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455 else if(sym==LPAR)
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456 { if(mode==GDECL) {mode=ADECL;getsym();mode=GDECL;}
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457 else getsym();
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458 if(sym==RPAR) getsym();
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459 else
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460 { n->sc=FUNCTION;
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461 adecl();
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462 n->sc=EMPTY;
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463 }
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464 type=list2(FUNCTION,type);
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465 }
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466 else return n;
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467 }
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468 adecl()
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469 { if(mode!=GDECL) error(DCERR);
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470 mode=ADECL;
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471 args= 2;
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472 while(1)
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473 { if(sym!=IDENT) error(DCERR);
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474 nptr->ty = INT;
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475 nptr->sc = LVAR;
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476 nptr->dsp = (args += 2);
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477 if(getsym()!=COMMA) break;
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478 getsym();
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479 }
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480 checksym(RPAR);
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481 mode=GDECL;
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482 return;
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483 }
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484 reverse(t1)
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485 int t1;
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486 {int t2,t3;
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487 t2=t1;
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488 while(type!=t1)
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489 { t3=cadr(type);
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490 rplacad(type,t2);
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491 t2=type;
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492 type=t3;
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493 }
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494 type=t2;
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495 }
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496 size(t)
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497 int t;
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498 { if(t==CHAR) return 1;
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499 if(scalar(t)) return 2;
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500 if(car(t)==STRUCT||car(t)==UNION)
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501 { if(cadr(t)==-1) error(DCERR);
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502 return(cadr(t));
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503 }
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504 if(car(t)==ARRAY) return(size(cadr(t))*caddr(t));
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505 else error(DCERR);
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506 /*NOTREACHED*/
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507 }
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508 def(n)
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509 NMTBL *n;
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510 {int sz,nsc,ndsp,slfree,l,t,e;
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511 if(car(type)==FUNCTION)
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512 { fcheck(n);
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513 return;
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514 }
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515 if (n->sc!=EMPTY &&
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516 (mode!=ADECL || n->sc!=LVAR || n->ty!=INT) &&
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517 (mode!=GSDECL&&mode!=LSDECL || n->sc!=FIELD || n->dsp!=disp) &&
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518 (mode!=GUDECL&&mode!=LUDECL || n->sc!=FIELD || n->dsp!=0) )
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519 error(DCERR);
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520 sz = size(n->ty = type);
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521 switch(mode)
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522 {case GDECL:
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523 printf("%s\tEQU\t%u\n",n->nm,gpc);
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524 case STADECL:
|
|
525 nsc = GVAR;
|
|
526 ndsp = gpc;
|
|
527 if(sym==ASS)
|
|
528 { t=type;
|
|
529 if(!scalar(t))
|
|
530 error(TYERR);
|
|
531 if(mode==STADECL) printf("\tBRA\t_%d\n",l=fwdlabel());
|
|
532 fwddef(ilabel);
|
|
533 getsym();
|
|
534 slfree=lfree;
|
|
535 e=expr1();
|
|
536 if(car(e)==CONST)
|
|
537 { lddim(cadr(e));
|
|
538 indexy(t==CHAR?"STB":"STD",gpc);
|
|
539 }
|
|
540 else if(t!=CHAR)
|
|
541 { if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
542 leaxy(cadr(cadr(e)));
|
|
543 else if(car(e)==FNAME)
|
|
544 leaxpcr((NMTBL *)cadr(e));
|
|
545 else error(TYERR);
|
|
546 stxy(gpc);
|
|
547 }
|
|
548 else error(TYERR);
|
|
549 lfree=slfree;
|
|
550 jmp(ilabel=fwdlabel());
|
|
551 if(mode==STADECL) fwddef(l);
|
|
552 type=t;
|
|
553 }
|
|
554 gpc +=sz;
|
|
555 break;
|
|
556 case GSDECL:
|
|
557 nsc = FIELD;
|
|
558 ndsp = disp;
|
|
559 disp += sz;
|
|
560 break;
|
|
561 case GUDECL:
|
|
562 nsc = FIELD;
|
|
563 ndsp = 0;
|
|
564 if (disp < sz) disp = sz;
|
|
565 break;
|
|
566 case GTDECL:
|
|
567 nsc = TYPE;
|
|
568 break;
|
|
569 case ADECL:
|
|
570 if(type==CHAR) ++(n->dsp);
|
|
571 else if (!scalar(type)) error(TYERR);
|
|
572 return;
|
|
573 case LDECL:
|
|
574 nsc = LVAR;
|
|
575 ndsp = (disp -= sz);
|
|
576 break;
|
|
577 case LSDECL:
|
|
578 nsc = FIELD;
|
|
579 ndsp = disp;
|
|
580 disp += sz;
|
|
581 break;
|
|
582 case LUDECL:
|
|
583 nsc = FIELD;
|
|
584 ndsp = 0;
|
|
585 if (disp < sz) disp = sz;
|
|
586 break;
|
|
587 case LTDECL:
|
|
588 nsc = TYPE;
|
|
589 break;
|
|
590 default:
|
|
591 error(DCERR);
|
|
592 }
|
|
593 n->sc = nsc;
|
|
594 n->dsp = ndsp;
|
|
595 }
|
|
596 sdecl(s)
|
|
597 int s;
|
|
598 {int smode,sdisp,type;
|
|
599 NMTBL *nptr0;
|
|
600 smode=mode;
|
|
601 if (mode==GDECL || mode==GSDECL || mode==GUDECL || mode==GTDECL)
|
|
602 mode=(s==STRUCT?GSDECL:GUDECL);
|
|
603 else mode=(s==STRUCT?LSDECL:LUDECL);
|
|
604 sdisp=disp;
|
|
605 disp=0;
|
|
606 if (getsym() == IDENT)
|
|
607 { nptr0 = nptr;
|
|
608 if (getsym() == LC)
|
|
609 { if (nptr0->sc != EMPTY) error(DCERR);
|
|
610 nptr0->sc = TAG;
|
|
611 nptr0->ty = list2(s,-1);
|
|
612 while (getsym() != RC) decl();
|
|
613 getsym();
|
|
614 rplacad(type = nptr0->ty,disp);
|
|
615 }
|
|
616 else
|
|
617 { if(nptr0->sc == EMPTY) nptr0=gnptr;
|
|
618 if(nptr0->sc == EMPTY) error(UDERR);
|
|
619 if(nptr0->sc != TAG) error(TYERR);
|
|
620 type = nptr0->ty;
|
|
621 }
|
|
622 }
|
|
623 else if(sym==LC)
|
|
624 { while(getsym() != RC) decl();
|
|
625 getsym();
|
|
626 type = list2(s,disp);
|
|
627 }
|
|
628 else error(DCERR);
|
|
629 disp=sdisp;
|
|
630 mode=smode;
|
|
631 return type;
|
|
632 }
|
|
633 fdecl(n)
|
|
634 NMTBL *n;
|
|
635 { args=0;
|
|
636 fcheck(n);
|
|
637 mode=ADECL;
|
|
638 lfree= HEAPSIZE;
|
|
639 while (sym!=LC) {decl(); getsym();}
|
|
640 disp=0;
|
|
641 mode=STAT;
|
|
642 while (typeid(getsym()) || sym==STATIC || sym==TYPEDEF)
|
|
643 { mode=LDECL;
|
|
644 decl();
|
|
645 mode=STAT;
|
|
646 }
|
|
647 control=1;
|
|
648 printf("%s\n\tPSHS\tU\n\tLEAU\t,S\n",n->nm);
|
|
649 if(disp) printf("\tLEAS\t%d,S\n",disp);
|
|
650 lvar= -disp;
|
|
651 while(sym!=RC) statement();
|
|
652 if (control) return2();
|
|
653 }
|
|
654 fcheck(n)
|
|
655 NMTBL *n;
|
|
656 { if(mode!=GDECL||car(type)!=FUNCTION) error(DCERR);
|
|
657 if(n->sc==FUNCTION) compatible(n->ty,cadr(type));
|
|
658 else if(n->sc!=EMPTY) error(DCERR);
|
|
659 n->sc=FUNCTION;
|
|
660 n->ty=cadr(type);
|
|
661 }
|
|
662 compatible(t1,t2)
|
|
663 int t1,t2;
|
|
664 { if(integral(t1))
|
|
665 { if(t1!=t2) error(TYERR);
|
|
666 }
|
|
667 else if(car(t1)!=car(t2)) error(TYERR);
|
|
668 else if((car(t1)==STRUCT || car(t1)==UNION) && cadr(t1)!=cadr(t2))
|
|
669 error(TYERR);
|
|
670 else if(car(t1)==POINTER || car(t1)==ARRAY ||car(t1)==FUNCTION)
|
|
671 compatible(cadr(t1),cadr(t2));
|
|
672 }
|
|
673 scalar(t)
|
|
674 int t;
|
|
675 { return(integral(t)||car(t)==POINTER);
|
|
676 }
|
|
677 integral(t)
|
|
678 int t;
|
|
679 { return(t==INT||t==CHAR||t==UNSIGNED);
|
|
680 }
|
|
681
|
|
682 statement()
|
|
683 {int slfree;
|
|
684 switch(sym)
|
|
685 {case IF:
|
|
686 doif();
|
|
687 return;
|
|
688 case WHILE:
|
|
689 dowhile();
|
|
690 return;
|
|
691 case DO:
|
|
692 dodo();
|
|
693 return;
|
|
694 case FOR:
|
|
695 dofor();
|
|
696 return;
|
|
697 case SWITCH:
|
|
698 doswitch();
|
|
699 return;
|
|
700 case LC:
|
|
701 docomp();
|
|
702 return;
|
|
703 case BREAK:
|
|
704 jmp(blabel);
|
|
705 getsym();
|
|
706 checksym(SM);
|
|
707 return;
|
|
708 case CONTINUE:
|
|
709 jmp(clabel);
|
|
710 getsym();
|
|
711 checksym(SM);
|
|
712 return;
|
|
713 case CASE:
|
|
714 docase();
|
|
715 statement();
|
|
716 return;
|
|
717 case DEFAULT:
|
|
718 dodefault();
|
|
719 statement();
|
|
720 return;
|
|
721 case RETURN:
|
|
722 doreturn();
|
|
723 return;
|
|
724 case GOTO:
|
|
725 dogoto();
|
|
726 return;
|
|
727 case SM:
|
|
728 getsym();
|
|
729 return;
|
|
730 default:if(sym==IDENT&&skipspc()==':')
|
|
731 { dolabel();
|
|
732 statement();
|
|
733 }
|
|
734 else
|
|
735 { slfree=lfree;
|
|
736 gexpr(expr());
|
|
737 lfree=slfree;
|
|
738 checksym(SM);
|
|
739 }
|
|
740 }
|
|
741 }
|
|
742 doif()
|
|
743 {int l1,l2,slfree;
|
|
744 getsym();
|
|
745 checksym(LPAR);
|
|
746 slfree=lfree;
|
|
747 bexpr(expr(),0,l1=fwdlabel());
|
|
748 lfree=slfree;
|
|
749 checksym(RPAR);
|
|
750 statement();
|
|
751 if(sym==ELSE)
|
|
752 { if (l2 = control) jmp(l2=fwdlabel());
|
|
753 fwddef(l1);
|
|
754 getsym();
|
|
755 statement();
|
|
756 if (l2) fwddef(l2);
|
|
757 }
|
|
758 else fwddef(l1);
|
|
759 }
|
|
760 dowhile()
|
|
761 {int sbreak,scontinue,slfree,e;
|
|
762 sbreak=blabel;
|
|
763 scontinue=clabel;
|
|
764 blabel=fwdlabel();
|
|
765 clabel=backdef();
|
|
766 getsym();
|
|
767 checksym(LPAR);
|
|
768 slfree=lfree;
|
|
769 e=expr();
|
|
770 checksym(RPAR);
|
|
771 if(sym==SM)
|
|
772 { bexpr(e,1,clabel);
|
|
773 lfree=slfree;
|
|
774 getsym();
|
|
775 }
|
|
776 else
|
|
777 { bexpr(e,0,blabel);
|
|
778 lfree=slfree;
|
|
779 statement();
|
|
780 jmp(clabel);
|
|
781 }
|
|
782 fwddef(blabel);
|
|
783 clabel=scontinue;
|
|
784 blabel=sbreak;
|
|
785 }
|
|
786 dodo()
|
|
787 {int sbreak,scontinue,l,slfree;
|
|
788 sbreak=blabel;
|
|
789 scontinue=clabel;
|
|
790 blabel=fwdlabel();
|
|
791 clabel=fwdlabel();
|
|
792 l=backdef();
|
|
793 getsym();
|
|
794 statement();
|
|
795 fwddef(clabel);
|
|
796 checksym(WHILE);
|
|
797 checksym(LPAR);
|
|
798 slfree=lfree;
|
|
799 bexpr(expr(),1,l);
|
|
800 lfree=slfree;
|
|
801 checksym(RPAR);
|
|
802 checksym(SM);
|
|
803 fwddef(blabel);
|
|
804 clabel=scontinue;
|
|
805 blabel=sbreak;
|
|
806 }
|
|
807 dofor()
|
|
808 {int sbreak,scontinue,l,e,slfree;
|
|
809 sbreak=blabel;
|
|
810 scontinue=clabel;
|
|
811 blabel=fwdlabel();
|
|
812 getsym();
|
|
813 checksym(LPAR);
|
|
814 slfree=lfree;
|
|
815 if(sym!=SM)
|
|
816 { gexpr(expr());
|
|
817 checksym(SM);
|
|
818 }
|
|
819 else getsym();
|
|
820 lfree=slfree;
|
|
821 l=backdef();
|
|
822 if(sym!=SM)
|
|
823 { bexpr(expr(),0,blabel);
|
|
824 checksym(SM);
|
|
825 }
|
|
826 else getsym();
|
|
827 lfree=slfree;
|
|
828 if(sym==RPAR)
|
|
829 { clabel=l;
|
|
830 getsym();
|
|
831 statement();
|
|
832 }
|
|
833 else
|
|
834 { clabel=fwdlabel();
|
|
835 e=expr();
|
|
836 checksym(RPAR);
|
|
837 statement();
|
|
838 fwddef(clabel);
|
|
839 gexpr(e);
|
|
840 lfree=slfree;
|
|
841 }
|
|
842 jmp(l);
|
|
843 fwddef(blabel);
|
|
844 clabel=scontinue;
|
|
845 blabel=sbreak;
|
|
846 }
|
|
847 doswitch()
|
|
848 {int sbreak,scase,sdefault,slfree;
|
|
849 sbreak=blabel;
|
|
850 blabel=fwdlabel();
|
|
851 sdefault=dlabel;
|
|
852 dlabel=0;
|
|
853 scase=cslabel;
|
|
854 getsym();
|
|
855 checksym(LPAR);
|
|
856 slfree=lfree;
|
|
857 gexpr(expr());
|
|
858 lfree=slfree;
|
|
859 checksym(RPAR);
|
|
860 cslabel = control = 0;
|
|
861 statement();
|
|
862 if(dlabel) printf("_%d\tEQU\t_%d\n",cslabel,dlabel);
|
|
863 else fwddef(cslabel);
|
|
864 cslabel=scase;
|
|
865 dlabel=sdefault;
|
|
866 fwddef(blabel);
|
|
867 blabel=sbreak;
|
|
868 }
|
|
869 docomp()
|
|
870 { getsym();
|
|
871 while(sym!=RC) statement();
|
|
872 getsym();
|
|
873 }
|
|
874 docase()
|
|
875 {int c,n,l,slfree;
|
|
876 c=0;
|
|
877 n=2;
|
|
878 slfree=lfree;
|
|
879 while(sym==CASE)
|
|
880 { getsym();
|
|
881 c=list2(cexpr(expr()),c);
|
|
882 n+=6;
|
|
883 checksym(COLON);
|
|
884 }
|
|
885 l=fwdlabel();
|
|
886 if (control)
|
|
887 { control=0;
|
|
888 if (n>127) jmp(l);
|
|
889 else printf("\tBRA\t_%d\n",l);
|
|
890 }
|
|
891 if (cslabel) fwddef(cslabel);
|
|
892 while(cadr(c))
|
|
893 { cmpdimm(car(c));
|
|
894 if((n-=6)>127) jcond(l,0);
|
|
895 else printf("\tBEQ\t_%d\n",l);
|
|
896 c=cadr(c);
|
|
897 }
|
|
898 lfree=slfree;
|
|
899 cmpdimm(car(c));
|
|
900 jcond(cslabel=fwdlabel(),1);
|
|
901 fwddef(l);
|
|
902 }
|
|
903 dodefault()
|
|
904 { getsym();
|
|
905 checksym(COLON);
|
|
906 if (dlabel) error(STERR);
|
|
907 if (!cslabel) jmp(cslabel = fwdlabel());
|
|
908 dlabel = backdef();
|
|
909 }
|
|
910 doreturn()
|
|
911 {int slfree;
|
|
912 if(getsym()==SM)
|
|
913 { getsym();
|
|
914 return2();
|
|
915 return;
|
|
916 }
|
|
917 slfree=lfree;
|
|
918 gexpr(expr());
|
|
919 lfree=slfree;
|
|
920 checksym(SM);
|
|
921 control=0;
|
|
922 switch(lvar)
|
|
923 {case 0:
|
|
924 ret("");
|
|
925 return;
|
|
926 case 2:
|
|
927 ret("X,");
|
|
928 return;
|
|
929 default:unlink();
|
|
930 return;
|
|
931 }
|
|
932 }
|
|
933 return2()
|
|
934 { control=0;
|
|
935 switch(lvar)
|
|
936 {case 0:
|
|
937 ret("");
|
|
938 return;
|
|
939 case 1:
|
|
940 ret("A,");
|
|
941 return;
|
|
942 case 2:
|
|
943 ret("D,");
|
|
944 return;
|
|
945 case 3:
|
|
946 ret("A,X,");
|
|
947 return;
|
|
948 case 4:
|
|
949 ret("D,X,");
|
|
950 return;
|
|
951 default:unlink();
|
|
952 return;
|
|
953 }
|
|
954 }
|
|
955 ret(reg)
|
|
956 char *reg;
|
|
957 { printf("\tPULS\t%sU,PC\n",reg);
|
|
958 }
|
|
959 unlink()
|
|
960 { printf("\tLEAS\t,U\n");
|
|
961 ret("");
|
|
962 }
|
|
963 dogoto()
|
|
964 {NMTBL *nptr0;
|
|
965 getsym();
|
|
966 nptr0=nptr;
|
|
967 checksym(IDENT);
|
|
968 if(nptr0->sc == BLABEL || nptr0->sc == FLABEL) jmp(nptr0->dsp);
|
|
969 else if(nptr0->sc == EMPTY)
|
|
970 { nptr0->sc = FLABEL;
|
|
971 jmp(nptr0->dsp = fwdlabel());
|
|
972 }
|
|
973 else error(STERR);
|
|
974 checksym(SM);
|
|
975 }
|
|
976 dolabel()
|
|
977 { if(nptr->sc == FLABEL) fwddef(nptr->dsp);
|
|
978 else if(nptr->sc != EMPTY) error(TYERR);
|
|
979 nptr->sc = BLABEL;
|
|
980 nptr->dsp = backdef();
|
|
981 getsym();
|
|
982 checksym(COLON);
|
|
983 }
|
|
984
|
|
985 expr()
|
|
986 { return(rvalue(expr0()));
|
|
987 }
|
|
988 expr0()
|
|
989 {int e;
|
|
990 e=expr1();
|
|
991 while(sym==COMMA) {getsym();e=list3(COMMA,e,rvalue(expr1()));}
|
|
992 return e;
|
|
993 }
|
|
994 expr1()
|
|
995 {int e1,e2,t,op;
|
|
996 e1=expr2();
|
|
997 switch (sym)
|
|
998 {case ASS:
|
|
999 lcheck(e1);
|
|
1000 t=type;
|
|
1001 getsym();
|
|
1002 e2=rvalue(expr1());
|
|
1003 if(t==CHAR) {type= INT;return(list3(CASS,e1,e2));}
|
|
1004 type=t;
|
|
1005 return(list3(ASS,e1,e2));
|
|
1006 case ADD+AS: case SUB+AS: case MUL+AS: case DIV+AS: case MOD+AS:
|
|
1007 case RSHIFT+AS: case LSHIFT+AS: case BAND+AS: case EOR+AS: case BOR+AS:
|
|
1008 op = sym-AS;
|
|
1009 lcheck(e1);
|
|
1010 t=type;
|
|
1011 getsym();
|
|
1012 e2=rvalue(expr1());
|
|
1013 if(!integral(type)) error(TYERR);
|
|
1014 if((t==UNSIGNED||type==UNSIGNED)&&
|
|
1015 (op==MUL||op==DIV||op==MOD||op==RSHIFT||op==LSHIFT))
|
|
1016 op=op+US;
|
|
1017 if(t==CHAR)
|
|
1018 { type= INT;
|
|
1019 return(list4(CASSOP,e1,e2,op));
|
|
1020 }
|
|
1021 type=t;
|
|
1022 if(integral(t)) return(list4(ASSOP,e1,e2,op));
|
|
1023 if((op!=ADD&&op!=SUB)||car(t)!=POINTER) error(TYERR);
|
|
1024 e2=binop(MUL,e2,list2(CONST,size(cadr(t))),INT,UNSIGNED);
|
|
1025 type=t;
|
|
1026 return list4(ASSOP,e1,e2,op);
|
|
1027 default:
|
|
1028 return(e1);
|
|
1029 }
|
|
1030 }
|
|
1031 expr2()
|
|
1032 {int e1,e2,e3,t;
|
|
1033 e1=expr3();
|
|
1034 if(sym==COND)
|
|
1035 { e1=rvalue(e1);
|
|
1036 getsym();
|
|
1037 e2=rvalue(expr2());
|
|
1038 t=type;
|
|
1039 checksym(COLON);
|
|
1040 e3=rvalue(expr2());
|
|
1041 if(car(e1)==CONST)
|
|
1042 if(cadr(e1)) {type=t;return e2;}
|
|
1043 else return e3;
|
|
1044 if(type==INT||t!=INT&&type==UNSIGNED) type=t;
|
|
1045 return(list4(COND,e1,e2,e3));
|
|
1046 }
|
|
1047 return(e1);
|
|
1048 }
|
|
1049 expr3()
|
|
1050 {int e;
|
|
1051 e=expr4();
|
|
1052 while(sym==LOR)
|
|
1053 { e=rvalue(e);
|
|
1054 getsym();
|
|
1055 e=list3(LOR,e,rvalue(expr4()));
|
|
1056 type= INT;
|
|
1057 }
|
|
1058 return(e);
|
|
1059 }
|
|
1060 expr4()
|
|
1061 {int e;
|
|
1062 e=expr5();
|
|
1063 while(sym==LAND)
|
|
1064 { e=rvalue(e);
|
|
1065 getsym();
|
|
1066 e=list3(LAND,e,rvalue(expr5()));
|
|
1067 type= INT;
|
|
1068 }
|
|
1069 return(e);
|
|
1070 }
|
|
1071 expr5()
|
|
1072 {int e1,e2,t;
|
|
1073 e1=expr6();
|
|
1074 while(sym==BOR)
|
|
1075 { e1=rvalue(e1);
|
|
1076 t=type;
|
|
1077 getsym();
|
|
1078 e2=rvalue(expr6());
|
|
1079 e1=binop(BOR,e1,e2,t,type);
|
|
1080 }
|
|
1081 return(e1);
|
|
1082 }
|
|
1083 expr6()
|
|
1084 {int e1,e2,t;
|
|
1085 e1=expr7();
|
|
1086 while(sym==EOR)
|
|
1087 { e1=rvalue(e1);
|
|
1088 t=type;
|
|
1089 getsym();
|
|
1090 e2=rvalue(expr7());
|
|
1091 e1=binop(EOR,e1,e2,t,type);
|
|
1092 }
|
|
1093 return(e1);
|
|
1094 }
|
|
1095 expr7()
|
|
1096 {int e1,e2,t;
|
|
1097 e1=expr8();
|
|
1098 while(sym==BAND)
|
|
1099 { e1=rvalue(e1);
|
|
1100 t=type;
|
|
1101 getsym();
|
|
1102 e2=rvalue(expr8());
|
|
1103 e1=binop(BAND,e1,e2,t,type);
|
|
1104 }
|
|
1105 return(e1);
|
|
1106 }
|
|
1107 expr8()
|
|
1108 {int e,op;
|
|
1109 e=expr9();
|
|
1110 while((op=sym)==EQ||op==NEQ)
|
|
1111 { e=rvalue(e);
|
|
1112 getsym();
|
|
1113 e=list3(op,e,rvalue(expr9()));
|
|
1114 type= INT;
|
|
1115 }
|
|
1116 return e;
|
|
1117 }
|
|
1118 expr9()
|
|
1119 {int e1,e2,t,op;
|
|
1120 e1=expr10();
|
|
1121 while((op=sym)==GT||op==GE||op==LT||op==LE)
|
|
1122 { e1=rvalue(e1);
|
|
1123 t=type;
|
|
1124 getsym();
|
|
1125 e2=rvalue(expr10());
|
|
1126 if(t==INT&&type==INT) e1=list3(op,e1,e2);
|
|
1127 else e1=list3(op+US,e1,e2);
|
|
1128 type= INT;
|
|
1129 }
|
|
1130 return e1;
|
|
1131 }
|
|
1132 expr10()
|
|
1133 {int e1,e2,t,op;
|
|
1134 e1=expr11();
|
|
1135 while((op=sym)==RSHIFT||op==LSHIFT)
|
|
1136 { e1=rvalue(e1);
|
|
1137 t=type;
|
|
1138 getsym();
|
|
1139 e2=rvalue(expr11());
|
|
1140 e1=binop(op,e1,e2,t,type);
|
|
1141 }
|
|
1142 return e1;
|
|
1143 }
|
|
1144 expr11()
|
|
1145 {int e1,e2,t,op;
|
|
1146 e1=expr12();
|
|
1147 while((op=sym)==ADD||op==SUB)
|
|
1148 { e1=rvalue(e1);
|
|
1149 t=type;
|
|
1150 getsym();
|
|
1151 e2=rvalue(expr12());
|
|
1152 e1=binop(op,e1,e2,t,type);
|
|
1153 }
|
|
1154 return e1;
|
|
1155 }
|
|
1156 expr12()
|
|
1157 {int e1,e2,t,op;
|
|
1158 e1=expr13();
|
|
1159 while((op=sym)==MUL||op==DIV||op==MOD)
|
|
1160 { e1=rvalue(e1);
|
|
1161 t=type;
|
|
1162 getsym();
|
|
1163 e2=rvalue(expr13());
|
|
1164 e1=binop(op,e1,e2,t,type);
|
|
1165 }
|
|
1166 return e1;
|
|
1167 }
|
|
1168 expr13()
|
|
1169 {int e,op;
|
|
1170 switch (op = sym)
|
|
1171 {case INC: case DEC:
|
|
1172 getsym();
|
|
1173 lcheck(e=expr13());
|
|
1174 if(type==CHAR)
|
|
1175 { type= INT;
|
|
1176 return(list2(op==INC?CPREINC:CPREDEC,e));
|
|
1177 }
|
|
1178 if(integral(type))
|
|
1179 return(list3(PREINC,e,op==INC?1:-1));
|
|
1180 if(car(type)!=POINTER) error(TYERR);
|
|
1181 return(list3(PREINC,e,
|
|
1182 op==INC?size(cadr(type)):-size(cadr(type)) ));
|
|
1183 case MUL:
|
|
1184 getsym();
|
|
1185 e=rvalue(expr13());
|
|
1186 return(indop(e));
|
|
1187 case BAND:
|
|
1188 getsym();
|
|
1189 switch(car(e=expr13()))
|
|
1190 {case INDIRECT:
|
|
1191 e=cadr(e);
|
|
1192 break;
|
|
1193 case GVAR:
|
|
1194 case LVAR:
|
|
1195 e=list2(ADDRESS,e);
|
|
1196 break;
|
|
1197 case FNAME:
|
|
1198 return e;
|
|
1199 default:error(LVERR);
|
|
1200 }
|
|
1201 type=list2(POINTER,type);
|
|
1202 return e;
|
|
1203 case SUB:
|
|
1204 getsym();
|
|
1205 e=rvalue(expr13());
|
|
1206 if(!integral(type)) error(TYERR);
|
|
1207 return(car(e)==CONST?list2(CONST,-cadr(e)):list2(MINUS,e));
|
|
1208 case BNOT:
|
|
1209 getsym();
|
|
1210 e=rvalue(expr13());
|
|
1211 if(!integral(type)) error(TYERR);
|
|
1212 return(car(e)==CONST?list2(CONST,~cadr(e)):list2(BNOT,e));
|
|
1213 case LNOT:
|
|
1214 getsym();
|
|
1215 return(list2(LNOT,rvalue(expr13())));
|
|
1216 case SIZEOF:
|
|
1217 if(getsym()==LPAR)
|
|
1218 if(typeid(getsym()))
|
|
1219 { e=list2(CONST,size(typename()));
|
|
1220 type=INT;
|
|
1221 checksym(RPAR);
|
|
1222 return e;
|
|
1223 }
|
|
1224 else
|
|
1225 { e=expr0();
|
|
1226 checksym(RPAR);
|
|
1227 expr16(e);
|
|
1228 if(sym==INC||sym==DEC)
|
|
1229 { getsym();
|
|
1230 if(type==CHAR) type=INT;
|
|
1231 else if(!scalar(type))
|
|
1232 error(TYERR);
|
|
1233 }
|
|
1234 }
|
|
1235 else expr13();
|
|
1236 e=list2(CONST,size(type));
|
|
1237 type=INT;
|
|
1238 return e;
|
|
1239 }
|
|
1240 e=expr14();
|
|
1241 if((op=sym)==INC||op==DEC)
|
|
1242 { lcheck(e);
|
|
1243 getsym();
|
|
1244 if(type==CHAR)
|
|
1245 { type= INT;
|
|
1246 return(list2(op==INC?CPOSTINC:CPOSTDEC,e));
|
|
1247 }
|
|
1248 if(integral(type))
|
|
1249 return(list3(POSTINC,e,op==INC?1:-1));
|
|
1250 if(car(type)!=POINTER) error(TYERR);
|
|
1251 return (list3(POSTINC,e,
|
|
1252 op == INC ? size(cadr(type)): -size(cadr(type)) ));
|
|
1253 }
|
|
1254 return e;
|
|
1255 }
|
|
1256 expr14()
|
|
1257 {int e1,t;
|
|
1258 switch(sym)
|
|
1259 {case IDENT:
|
|
1260 switch(nptr->sc)
|
|
1261 {case GVAR:
|
|
1262 e1=list2(GVAR,nptr->dsp);
|
|
1263 type=nptr->ty;
|
|
1264 getsym();
|
|
1265 break;
|
|
1266 case LVAR:
|
|
1267 e1=list2(LVAR,nptr->dsp);
|
|
1268 type=nptr->ty;
|
|
1269 getsym();
|
|
1270 break;
|
|
1271 case FUNCTION:
|
|
1272 e1=list2(FNAME,(int)nptr);
|
|
1273 type=list2(FUNCTION,nptr->ty);
|
|
1274 getsym();
|
|
1275 break;
|
|
1276 case EMPTY:
|
|
1277 if(getsym()==LPAR)
|
|
1278 { nptr->sc = FUNCTION;
|
|
1279 nptr->ty= INT;
|
|
1280 type= list2(FUNCTION,INT);
|
|
1281 e1=expr15(list2(FNAME,(int)nptr));
|
|
1282 break;
|
|
1283 }
|
|
1284 default:error(UDERR);
|
|
1285 }
|
|
1286 break;
|
|
1287 case STRING:
|
|
1288 e1=list3(STRING,(int)sptr,symval);
|
|
1289 type=list3(ARRAY,CHAR,symval);
|
|
1290 getsym();
|
|
1291 break;
|
|
1292 case CONST:
|
|
1293 type= INT;
|
|
1294 e1=list2(CONST,symval);
|
|
1295 getsym();
|
|
1296 break;
|
|
1297 case LPAR:
|
|
1298 if(typeid(getsym()))
|
|
1299 { t=typename();
|
|
1300 checksym(RPAR);
|
|
1301 e1=expr13();
|
|
1302 type=t;
|
|
1303 return e1;
|
|
1304 }
|
|
1305 e1=expr0();
|
|
1306 checksym(RPAR);
|
|
1307 break;
|
|
1308 default:error(EXERR);
|
|
1309 }
|
|
1310 return expr16(e1);
|
|
1311 }
|
|
1312 expr16(e1)
|
|
1313 int e1;
|
|
1314 {int e2,t;
|
|
1315 while(1)
|
|
1316 if(sym==LBRA)
|
|
1317 { e1=rvalue(e1);
|
|
1318 t=type;
|
|
1319 getsym();
|
|
1320 e2=rvalue(expr0());
|
|
1321 checksym(RBRA);
|
|
1322 e1=binop(ADD,e1,e2,t,type);
|
|
1323 e1=indop(e1);
|
|
1324 }
|
|
1325 else if(sym==LPAR) e1=expr15(e1);
|
|
1326 else if(sym==PERIOD) e1=strop(e1);
|
|
1327 else if(sym==ARROW) e1=strop(indop(rvalue(e1)));
|
|
1328 else break;
|
|
1329 if(car(e1)==FNAME) type=list2(POINTER,type);
|
|
1330 return e1;
|
|
1331 }
|
|
1332 rvalue(e)
|
|
1333 int e;
|
|
1334 { if(type==CHAR)
|
|
1335 { type= INT;
|
|
1336 switch(car(e))
|
|
1337 {case GVAR:
|
|
1338 return(list2(CRGVAR,cadr(e)));
|
|
1339 case LVAR:
|
|
1340 return(list2(CRLVAR,cadr(e)));
|
|
1341 case INDIRECT:
|
|
1342 return(list2(CRINDIRECT,cadr(e)));
|
|
1343 default:return(e);
|
|
1344 }
|
|
1345 }
|
|
1346 if(!integral(type))
|
|
1347 if(car(type)==ARRAY)
|
|
1348 { type=list2(POINTER,cadr(type));
|
|
1349 if(car(e)==INDIRECT) return cadr(e);
|
|
1350 return list2(ADDRESS,e);
|
|
1351 }
|
|
1352 else if(car(type)!=POINTER) error(TYERR);
|
|
1353 switch(car(e))
|
|
1354 {case GVAR:
|
|
1355 return(list2(RGVAR,cadr(e)));
|
|
1356 case LVAR:
|
|
1357 return(list2(RLVAR,cadr(e)));
|
|
1358 case INDIRECT:
|
|
1359 return(list2(RINDIRECT,cadr(e)));
|
|
1360 default:return(e);
|
|
1361 }
|
|
1362 }
|
|
1363 lcheck(e)
|
|
1364 int e;
|
|
1365 { if(!scalar(type)||car(e)!=GVAR&&car(e)!=LVAR&&car(e)!=INDIRECT)
|
|
1366 error(LVERR);
|
|
1367 }
|
|
1368 indop(e)
|
|
1369 int e;
|
|
1370 { if(type!=INT&&type!=UNSIGNED)
|
|
1371 if(car(type)==POINTER) type=cadr(type);
|
|
1372 else error(TYERR);
|
|
1373 else type= CHAR;
|
|
1374 if(car(e)==ADDRESS) return(cadr(e));
|
|
1375 return(list2(INDIRECT,e));
|
|
1376 }
|
|
1377 strop(e)
|
|
1378 { getsym();
|
|
1379 if (sym!=IDENT||nptr->sc!=FIELD) error(TYERR);
|
|
1380 if (integral(type)||car(type)!=STRUCT && car(type)!=UNION)
|
|
1381 e=rvalue(e);
|
|
1382 type = nptr->ty;
|
|
1383 switch(car(e))
|
|
1384 {case GVAR:
|
|
1385 case LVAR:
|
|
1386 e=list2(car(e),cadr(e) + nptr->dsp);
|
|
1387 break;
|
|
1388 case INDIRECT:
|
|
1389 if(!nptr->dsp) break;
|
|
1390 e=list2(INDIRECT,list3(ADD,cadr(e),list2(CONST,nptr->dsp)));
|
|
1391 break;
|
|
1392 default:
|
|
1393 e=list2(INDIRECT,list3(ADD,e,list2(CONST,nptr->dsp)));
|
|
1394 }
|
|
1395 getsym();
|
|
1396 return e;
|
|
1397 }
|
|
1398 binop(op,e1,e2,t1,t2)
|
|
1399 int op,e1,e2,t1,t2;
|
|
1400 {int e;
|
|
1401 if(car(e1)==CONST&&car(e2)==CONST)
|
|
1402 { e1=cadr(e1);
|
|
1403 e2=cadr(e2);
|
|
1404 type= INT;
|
|
1405 switch(op)
|
|
1406 {case BOR:
|
|
1407 e=e1|e2;break;
|
|
1408 case EOR:
|
|
1409 e=e1^e2;break;
|
|
1410 case BAND:
|
|
1411 e=e1&e2;break;
|
|
1412 case ADD:
|
|
1413 if(integral(t1))
|
|
1414 { if(integral(t2))
|
|
1415 e=e1+e2;
|
|
1416 else
|
|
1417 { if(car(t2)!=POINTER) error(TYERR);
|
|
1418 e=size(cadr(t2))*e1+e2;
|
|
1419 type=t2;
|
|
1420 }
|
|
1421 }
|
|
1422 else
|
|
1423 { if(car(t1)!=POINTER) error(TYERR);
|
|
1424 e=e1+size(cadr(t1))*e2;
|
|
1425 type=t1;
|
|
1426 }
|
|
1427 break;
|
|
1428 case SUB:
|
|
1429 if(integral(t1))
|
|
1430 e=e1-e2;
|
|
1431 else
|
|
1432 { if(car(t1)!=POINTER) error(TYERR);
|
|
1433 e=e1-size(cadr(t1))*e2;
|
|
1434 type=t1;
|
|
1435 }
|
|
1436 break;
|
|
1437 case MUL:
|
|
1438 e=e1*e2;break;
|
|
1439 case DIV:
|
|
1440 if(!e2) error(EXERR);e=e1/e2;break;
|
|
1441 case MOD:
|
|
1442 if(!e2) error(EXERR);e=e1%e2;break;
|
|
1443 case RSHIFT:
|
|
1444 e=e1>>e2;break;
|
|
1445 case LSHIFT:
|
|
1446 e=e1<<e2;
|
|
1447 }
|
|
1448 return list2(CONST,e);
|
|
1449 }
|
|
1450 if((op==ADD||op==MUL||op==BOR||op==EOR||op==BAND)&&
|
|
1451 (car(e1)==CONST||car(e2)!=CONST&&
|
|
1452 (car(e1)==RGVAR||car(e1)==RLVAR)))
|
|
1453 {e=e1;e1=e2;e2=e;e=t1;t1=t2;t2=e;}
|
|
1454 if(op==ADD)
|
|
1455 { if(integral(t1))
|
|
1456 { if(integral(t2))
|
|
1457 { if(t1==INT) type=t2;else type=t1;
|
|
1458 return(list3(ADD,e1,e2));
|
|
1459 }
|
|
1460 if(car(t2)!=POINTER) error(TYERR);
|
|
1461 e=binop(MUL,e1,list2(CONST,size(cadr(t2))),t1,INT);
|
|
1462 type=t2;
|
|
1463 return(list3(ADD,e,e2));
|
|
1464 }
|
|
1465 if(car(t1)!=POINTER||!integral(t2)) error(TYERR);
|
|
1466 e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
1467 type=t1;
|
|
1468 if(car(e1)==ADDRESS&&car(e)==CONST)
|
|
1469 return(list2(ADDRESS,list2(car(cadr(e1)),
|
|
1470 cadr(cadr(e1))+cadr(e))));
|
|
1471 return(list3(ADD,e1,e));
|
|
1472 }
|
|
1473 if(op==SUB)
|
|
1474 { if(integral(t1))
|
|
1475 { if(!integral(t2)) error(TYERR);
|
|
1476 if(t1==INT) type=t2;else type=t1;
|
|
1477 return(list3(SUB,e1,e2));
|
|
1478 }
|
|
1479 if(car(t1)!=POINTER) error(TYERR);
|
|
1480 if(integral(t2))
|
|
1481 { e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
1482 type=t1;
|
|
1483 return(list3(SUB,e1,e));
|
|
1484 }
|
|
1485 if(car(t2)!=POINTER)
|
|
1486 error(TYERR);
|
|
1487 compatible(t1,t2);
|
|
1488 e=list3(SUB,e1,e2);
|
|
1489 e=binop(DIV,e,list2(CONST,size(cadr(t1))),UNSIGNED,INT);
|
|
1490 type= INT;
|
|
1491 return e;
|
|
1492 }
|
|
1493 if(!integral(t1)||!integral(t2)) error(TYERR);
|
|
1494 if(t1==INT) type=t2;else type=t1;
|
|
1495 if((op==MUL||op==DIV)&&car(e2)==CONST&&cadr(e2)==1) return e1;
|
|
1496 if(op==BOR||op==EOR||op==BAND) return(list3(op,e1,e2));
|
|
1497 return(list3(type==UNSIGNED?op+US:op,e1,e2));
|
|
1498 }
|
|
1499 expr15(e1)
|
|
1500 int e1;
|
|
1501 {int t,args;
|
|
1502 t=type;
|
|
1503 if(integral(t)||car(t)!=FUNCTION)
|
|
1504 error(TYERR);
|
|
1505 t=cadr(t);
|
|
1506 getsym();
|
|
1507 args=0;
|
|
1508 while(sym!=RPAR)
|
|
1509 { args=list2(rvalue(expr1()),args);
|
|
1510 if(sym!=COMMA) break;
|
|
1511 getsym();
|
|
1512 }
|
|
1513 checksym(RPAR);
|
|
1514 if(t==CHAR) type= INT;else type=t;
|
|
1515 return list3(FUNCTION,e1,args);
|
|
1516 }
|
|
1517 typeid(s)
|
|
1518 int s;
|
|
1519 { return (integral(s) || s==SHORT || s==LONG || s==STRUCT || s==UNION ||
|
|
1520 (s==IDENT && nptr->sc==TYPE));
|
|
1521 }
|
|
1522 typename()
|
|
1523 {int t;
|
|
1524 type=t=typespec();
|
|
1525 ndecl0();
|
|
1526 reverse(t);
|
|
1527 return type;
|
|
1528 }
|
|
1529 ndecl0()
|
|
1530 { if(sym==MUL)
|
|
1531 { getsym();
|
|
1532 return type=list2(POINTER,ndecl0());
|
|
1533 }
|
|
1534 return ndecl1();
|
|
1535 }
|
|
1536 ndecl1()
|
|
1537 {int i,t;
|
|
1538 if(sym==LPAR)
|
|
1539 if(getsym()==RPAR) {type=list2(FUNCTION,type); getsym();}
|
|
1540 else
|
|
1541 { ndecl0();
|
|
1542 checksym(RPAR);
|
|
1543 }
|
|
1544 while(1)
|
|
1545 if(sym==LBRA)
|
|
1546 { getsym();
|
|
1547 t=type;
|
|
1548 i=cexpr(expr());
|
|
1549 checksym(RBRA);
|
|
1550 type=list3(ARRAY,t,i);
|
|
1551 }
|
|
1552 else if(sym==LPAR)
|
|
1553 { getsym();
|
|
1554 checksym(RPAR);
|
|
1555 type=list2(FUNCTION,type);
|
|
1556 }
|
|
1557 else return type;
|
|
1558 }
|
|
1559
|
|
1560 bexpr(e1,cond,l1)
|
|
1561 int e1,l1;
|
|
1562 char cond;
|
|
1563 {int e2,l2;
|
|
1564 if (chk) return;
|
|
1565 e2=cadr(e1);
|
|
1566 switch(car(e1))
|
|
1567 {case LNOT:
|
|
1568 bexpr(e2,!cond,l1);
|
|
1569 return;
|
|
1570 case GT:
|
|
1571 rexpr(e1,l1,cond?"GT":"LE");
|
|
1572 return;
|
|
1573 case UGT:
|
|
1574 rexpr(e1,l1,cond?"HI":"LS");
|
|
1575 return;
|
|
1576 case GE:
|
|
1577 rexpr(e1,l1,cond?"GE":"LT");
|
|
1578 return;
|
|
1579 case UGE:
|
|
1580 rexpr(e1,l1,cond?"HS":"LO");
|
|
1581 return;
|
|
1582 case LT:
|
|
1583 rexpr(e1,l1,cond?"LT":"GE");
|
|
1584 return;
|
|
1585 case ULT:
|
|
1586 rexpr(e1,l1,cond?"LO":"HS");
|
|
1587 return;
|
|
1588 case LE:
|
|
1589 rexpr(e1,l1,cond?"LE":"GT");
|
|
1590 return;
|
|
1591 case ULE:
|
|
1592 rexpr(e1,l1,cond?"LS":"HI");
|
|
1593 return;
|
|
1594 case EQ:
|
|
1595 rexpr(e1,l1,cond?"EQ":"NE");
|
|
1596 return;
|
|
1597 case NEQ:
|
|
1598 rexpr(e1,l1,cond?"NE":"EQ");
|
|
1599 return;
|
|
1600 case LAND:
|
|
1601 bexpr(e2,0,cond?(l2=fwdlabel()):l1);
|
|
1602 bexpr(caddr(e1),cond,l1);
|
|
1603 if(cond) fwddef(l2);
|
|
1604 return;
|
|
1605 case LOR:
|
|
1606 bexpr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
1607 bexpr(caddr(e1),cond,l1);
|
|
1608 if(!cond) fwddef(l2);
|
|
1609 return;
|
|
1610 case CRGVAR:
|
|
1611 ldby(e2);
|
|
1612 jcond(l1,cond);
|
|
1613 return;
|
|
1614 case CRLVAR:
|
|
1615 ldbu(e2);
|
|
1616 jcond(l1,cond);
|
|
1617 return;
|
|
1618 case CONST:
|
|
1619 if(cond&&e2||!cond&&!e2) jmp(l1);
|
|
1620 return;
|
|
1621 case RGVAR:
|
|
1622 case RLVAR:
|
|
1623 case CRINDIRECT:
|
|
1624 gexpr(e1);
|
|
1625 jcond(l1,cond);
|
|
1626 return;
|
|
1627 default:gexpr(e1);
|
|
1628 subdim(0);
|
|
1629 jcond(l1,cond);
|
|
1630 return;
|
|
1631 }
|
|
1632 }
|
|
1633 rexpr(e1,l1,s)
|
|
1634 int e1,l1;
|
|
1635 char *s;
|
|
1636 { gexpr(list3(SUB,cadr(e1),caddr(e1)));
|
|
1637 printf("\tLB%s\t_%d\n",s,l1);
|
|
1638 }
|
|
1639 jcond(l,cond)
|
|
1640 int l;
|
|
1641 char cond;
|
|
1642 { printf("\tLB%s\t_%d\n",cond?"NE":"EQ",l);
|
|
1643 }
|
|
1644 jmp(l)
|
|
1645 int l;
|
|
1646 { control=0;
|
|
1647 printf("\tLBRA\t_%d\n",l);
|
|
1648 }
|
|
1649 fwdlabel()
|
|
1650 { return labelno++;
|
|
1651 }
|
|
1652 fwddef(l)
|
|
1653 int l;
|
|
1654 { control=1;
|
|
1655 printf("_%d\n",l);
|
|
1656 }
|
|
1657 backdef()
|
|
1658 { control=1;
|
|
1659 printf("_%d\n",labelno);
|
|
1660 return labelno++;
|
|
1661 }
|
|
1662
|
|
1663 gexpr(e1)
|
|
1664 int e1;
|
|
1665 {int e2,e3;
|
|
1666 if (chk) return;
|
|
1667 e2 = cadr(e1);
|
|
1668 switch (car(e1))
|
|
1669 {case GVAR:
|
|
1670 leaxy(e2);
|
|
1671 return;
|
|
1672 case RGVAR:
|
|
1673 lddy(e2);
|
|
1674 return;
|
|
1675 case CRGVAR:
|
|
1676 ldby(e2);
|
|
1677 sex();
|
|
1678 return;
|
|
1679 case LVAR:
|
|
1680 leaxu(e2);
|
|
1681 return;
|
|
1682 case RLVAR:
|
|
1683 lddu(e2);
|
|
1684 return;
|
|
1685 case CRLVAR:
|
|
1686 ldbu(e2);
|
|
1687 sex();
|
|
1688 return;
|
|
1689 case FNAME:
|
|
1690 leaxpcr((NMTBL *)e2);
|
|
1691 tfrxd();
|
|
1692 return;
|
|
1693 case CONST:
|
|
1694 if (e2) lddim(e2);
|
|
1695 else clrd();
|
|
1696 return;
|
|
1697 case STRING:
|
|
1698 string(e1);
|
|
1699 return;
|
|
1700 case FUNCTION:
|
|
1701 function(e1);
|
|
1702 return;
|
|
1703 case INDIRECT:
|
|
1704 indirect(e1);
|
|
1705 return;
|
|
1706 case RINDIRECT: case CRINDIRECT:
|
|
1707 rindirect(e1);
|
|
1708 return;
|
|
1709 case ADDRESS:
|
|
1710 gexpr(e2);
|
|
1711 tfrxd();
|
|
1712 return;
|
|
1713 case MINUS:
|
|
1714 gexpr(e2);
|
|
1715 printf("\tNEGA\n\tNEGB\n\tSBCA\t#0\n");
|
|
1716 return;
|
|
1717 case BNOT:
|
|
1718 gexpr(e2);
|
|
1719 printf("\tCOMA\n\tCOMB\n");
|
|
1720 return;
|
|
1721 case PREINC:
|
|
1722 switch (car(e2))
|
|
1723 {case GVAR: case LVAR:
|
|
1724 ldd(e2);
|
|
1725 adddim(caddr(e1));
|
|
1726 std(e2);
|
|
1727 return;
|
|
1728 default:
|
|
1729 gexpr(e2);
|
|
1730 lddx();
|
|
1731 adddim(caddr(e1));
|
|
1732 stdx();
|
|
1733 return;
|
|
1734 }
|
|
1735 case POSTINC:
|
|
1736 switch (car(e2))
|
|
1737 {case GVAR: case LVAR:
|
|
1738 ldd(e2);
|
|
1739 adddim(e3 = caddr(e1));
|
|
1740 std(e2);
|
|
1741 subdim(e3);
|
|
1742 return;
|
|
1743 default:
|
|
1744 gexpr(e2);
|
|
1745 lddx();
|
|
1746 adddim(e3=caddr(e1));
|
|
1747 stdx();
|
|
1748 subdim(e3);
|
|
1749 return;
|
|
1750 }
|
|
1751 case CPOSTINC:
|
|
1752 gexpr(e2);
|
|
1753 ldbx();
|
|
1754 incx();
|
|
1755 sex();
|
|
1756 return;
|
|
1757 case CPREINC:
|
|
1758 gexpr(e2);
|
|
1759 incx();
|
|
1760 ldbx();
|
|
1761 sex();
|
|
1762 return;
|
|
1763 case CPOSTDEC:
|
|
1764 gexpr(e2);
|
|
1765 ldbx();
|
|
1766 decx();
|
|
1767 sex();
|
|
1768 return;
|
|
1769 case CPREDEC:
|
|
1770 gexpr(e2);
|
|
1771 decx();
|
|
1772 ldbx();
|
|
1773 sex();
|
|
1774 return;
|
|
1775 case MUL: case UMUL:
|
|
1776 if (car(e3=caddr(e1)) == CONST)
|
|
1777 { if (0 < (e3 = cadr(e3)) && e3 <= 10)
|
|
1778 { gexpr(e2);
|
|
1779 switch (e3)
|
|
1780 {case 8:
|
|
1781 asld();
|
|
1782 case 4:
|
|
1783 asld();
|
|
1784 case 2:
|
|
1785 asld();
|
|
1786 case 1:
|
|
1787 return;
|
|
1788 case 10:
|
|
1789 asld();
|
|
1790 case 5:
|
|
1791 pushd();
|
|
1792 asld();
|
|
1793 asld();
|
|
1794 addds();
|
|
1795 return;
|
|
1796 case 6:
|
|
1797 asld();
|
|
1798 case 3:
|
|
1799 pushd();
|
|
1800 asld();
|
|
1801 addds();
|
|
1802 return;
|
|
1803 case 9: case 7:
|
|
1804 pushd();
|
|
1805 asld();
|
|
1806 asld();
|
|
1807 asld();
|
|
1808 if (e3 == 9) addds(); else subds();
|
|
1809 return;
|
|
1810 }
|
|
1811 }
|
|
1812 }
|
|
1813 case DIV: case UDIV: case MOD: case UMOD:
|
|
1814 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
|
|
1815 binexpr(e1);
|
|
1816 return;
|
|
1817 case ADD: case SUB: case BAND: case EOR: case BOR:
|
|
1818 machinop(e1);
|
|
1819 return;
|
|
1820 case COND:
|
|
1821 e2=fwdlabel();
|
|
1822 bexpr(cadr(e1),0,e2);
|
|
1823 gexpr(caddr(e1));
|
|
1824 jmp(e3=fwdlabel());
|
|
1825 fwddef(e2);
|
|
1826 gexpr(cadddr(e1));
|
|
1827 fwddef(e3);
|
|
1828 return;
|
|
1829 case ASS: case CASS:
|
|
1830 assign(e1);
|
|
1831 return;
|
|
1832 case ASSOP: case CASSOP:
|
|
1833 assop(e1);
|
|
1834 return;
|
|
1835 case COMMA:
|
|
1836 gexpr(e2);
|
|
1837 gexpr(caddr(e1));
|
|
1838 return;
|
|
1839 default:
|
|
1840 bexpr(e1,1,e2=fwdlabel());
|
|
1841 clrd();
|
|
1842 printf("\tBRA\t*+5\n");
|
|
1843 fwddef(e2);
|
|
1844 lddim(1);
|
|
1845 }
|
|
1846 }
|
|
1847 string(e1)
|
|
1848 int e1;
|
|
1849 {char *s;
|
|
1850 int i,l,lb;
|
|
1851 s=(char *)cadr(e1);
|
|
1852 lb=fwdlabel();
|
|
1853 if ((l = caddr(e1)) < 128)
|
|
1854 printf("\tLEAX\t2,PC\n\tBRA\t_%d\n",lb);
|
|
1855 else
|
|
1856 printf("\tLEAX\t3,PC\n\tLBRA\t_%d\n",lb);
|
|
1857 do
|
|
1858 { printf("\tFCB\t%d",*s++);
|
|
1859 for (i=8; --l && --i;) printf(",%d",*s++);
|
|
1860 printf("\n");
|
|
1861 }
|
|
1862 while (l);
|
|
1863 fwddef(lb);
|
|
1864 }
|
|
1865 function(e1)
|
|
1866 int e1;
|
|
1867 {int e2,e3,e4,e5,nargs;
|
|
1868 NMTBL *n;
|
|
1869 e2 = cadr(e1);
|
|
1870 nargs = 0;
|
|
1871 for (e3 = caddr(e1); e3; e3 = cadr(e3))
|
|
1872 { n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
1873 switch(car(e4))
|
|
1874 {case FNAME:
|
|
1875 leaxpcr(n);
|
|
1876 pushx();
|
|
1877 break;
|
|
1878 case ADDRESS:
|
|
1879 gexpr(e5);
|
|
1880 pushx();
|
|
1881 break;
|
|
1882 default:gexpr(e4);
|
|
1883 pushd();
|
|
1884 }
|
|
1885 ++nargs;
|
|
1886 }
|
|
1887 if (car(e2) == FNAME)
|
|
1888 { n=(NMTBL *)cadr(e2);
|
|
1889 printf("\tLBSR\t%s\n",n->nm);
|
|
1890 }
|
|
1891 else
|
|
1892 { gexpr(e2);
|
|
1893 printf("\tJSR\t,X\n");
|
|
1894 }
|
|
1895 if (nargs) printf("\tLEAS\t%d,S\n",2*nargs);
|
|
1896 }
|
|
1897 indirect(e1)
|
|
1898 int e1;
|
|
1899 {int e2,e3,e4;
|
|
1900 e3 = cadr(e2 = cadr(e1));
|
|
1901 switch(car(e2))
|
|
1902 {case RGVAR: case RLVAR:
|
|
1903 ldx(e2);
|
|
1904 return;
|
|
1905 case ADD:
|
|
1906 if(car(e3)==ADDRESS)
|
|
1907 { gexpr(caddr(e2));
|
|
1908 gexpr(cadr(e3));
|
|
1909 opdx("LEAX");
|
|
1910 return;
|
|
1911 }
|
|
1912 switch(car(e4 = caddr(e2)))
|
|
1913 {case RGVAR: case RLVAR:
|
|
1914 gexpr(e3);
|
|
1915 ldx(e4);
|
|
1916 opdx("LEAX");
|
|
1917 return;
|
|
1918 }
|
|
1919 default:
|
|
1920 gexpr(e2);
|
|
1921 tfrdx();
|
|
1922 }
|
|
1923 }
|
|
1924
|
|
1925 machinop(e1)
|
|
1926 int e1;
|
|
1927 {int e2,e3;
|
|
1928 e2 = cadr(e1);
|
|
1929 switch (car(e3 = caddr(e1)))
|
|
1930 {case RGVAR: case RLVAR: case CONST:
|
|
1931 gexpr(e2);
|
|
1932 oprt(car(e1),e3);
|
|
1933 return;
|
|
1934 default:
|
|
1935 gexpr(e3);
|
|
1936 pushd();
|
|
1937 gexpr(e2);
|
|
1938 tosop(car(e1));
|
|
1939 return;
|
|
1940 }
|
|
1941 }
|
|
1942
|
|
1943 rindirect(e1)
|
|
1944 int e1;
|
|
1945 {char *op;
|
|
1946 int e2,e3,e4,byte,l;
|
|
1947 op = ((byte = (car(e1) == CRINDIRECT)) ? "LDB" : "LDD");
|
|
1948 e3 = cadr(e2 = cadr(e1));
|
|
1949 switch (car(e2))
|
|
1950 {case RGVAR: case RLVAR:
|
|
1951 indir(op,e2);
|
|
1952 sextend(byte);
|
|
1953 return;
|
|
1954 case ADD:
|
|
1955 if(car(e3)==ADDRESS)
|
|
1956 { gexpr(caddr(e2));
|
|
1957 gexpr(cadr(e3));
|
|
1958 opdx(op);
|
|
1959 sextend(byte);
|
|
1960 return;
|
|
1961 }
|
|
1962 switch(car(e4=caddr(e2)))
|
|
1963 {case RGVAR: case RLVAR:
|
|
1964 gexpr(e3);
|
|
1965 ldx(e4);
|
|
1966 opdx(op);
|
|
1967 sextend(byte);
|
|
1968 return;
|
|
1969 case CONST:
|
|
1970 switch (car(e3))
|
|
1971 {case RGVAR: case RLVAR:
|
|
1972 ldx(e3);
|
|
1973 indexx(op,cadr(e4));
|
|
1974 sextend(byte);
|
|
1975 return;
|
|
1976 }
|
|
1977 default:
|
|
1978 gexpr(e3);
|
|
1979 pushd();
|
|
1980 gexpr(e4);
|
|
1981 pulx();
|
|
1982 opdx(op);
|
|
1983 sextend(byte);
|
|
1984 return;
|
|
1985 }
|
|
1986 case PREINC:
|
|
1987 if ((l = caddr(e2)) == -1 || l == -2)
|
|
1988 switch (car(e3))
|
|
1989 {case GVAR: case LVAR:
|
|
1990 ldx(e3);
|
|
1991 predecx(op,l);
|
|
1992 stx(e3);
|
|
1993 sextend(byte);
|
|
1994 return;
|
|
1995 }
|
|
1996 break;
|
|
1997 case POSTINC:
|
|
1998 if ((l = caddr(e2)) == 1 || l == 2)
|
|
1999 switch (car(e3))
|
|
2000 {case GVAR: case LVAR:
|
|
2001 ldx(e3);
|
|
2002 postincx(op,l);
|
|
2003 stx(e3);
|
|
2004 sextend(byte);
|
|
2005 return;
|
|
2006 }
|
|
2007 break;
|
|
2008 }
|
|
2009 gexpr(e2);
|
|
2010 tfrdx();
|
|
2011 indexx(op,0);
|
|
2012 sextend(byte);
|
|
2013 }
|
|
2014 assign(e1)
|
|
2015 int e1;
|
|
2016 {char *op;
|
|
2017 int e2,e3,e4,e5,l;
|
|
2018 op = (car(e1) == CASS ? "STB" : "STD");
|
|
2019 e3 = cadr(e2 = cadr(e1));
|
|
2020 e4 = caddr(e1);
|
|
2021 switch(car(e2))
|
|
2022 {case GVAR: case LVAR:
|
|
2023 gexpr(e4);
|
|
2024 index(op,e2);
|
|
2025 return;
|
|
2026 case INDIRECT:
|
|
2027 switch(car(e3))
|
|
2028 {case RGVAR: case RLVAR:
|
|
2029 gexpr(e4);
|
|
2030 indir(op,e3);
|
|
2031 return;
|
|
2032 case ADD:
|
|
2033 if (car(caddr(e3)) == CONST)
|
|
2034 switch (car(e5=cadr(e3)))
|
|
2035 {case RGVAR: case RLVAR:
|
|
2036 gexpr(e4);
|
|
2037 ldx(e5);
|
|
2038 indexx(op,cadr(caddr(e3)));
|
|
2039 return;
|
|
2040 }
|
|
2041 break;
|
|
2042 case PREINC:
|
|
2043 if ((l = caddr(e3)) == -1 || l == -2)
|
|
2044 switch (car(e5=cadr(e3)))
|
|
2045 {case GVAR: case LVAR:
|
|
2046 gexpr(e4);
|
|
2047 ldx(e5);
|
|
2048 predecx(op,l);
|
|
2049 stx(e5);
|
|
2050 return;
|
|
2051 }
|
|
2052 break;
|
|
2053 case POSTINC:
|
|
2054 if ((l = caddr(e3)) == 1 || l == 2)
|
|
2055 switch (car(e5=cadr(e3)))
|
|
2056 {case GVAR: case LVAR:
|
|
2057 gexpr(e4);
|
|
2058 ldx(e5);
|
|
2059 postincx(op,l);
|
|
2060 stx(e5);
|
|
2061 return;
|
|
2062 }
|
|
2063 break;
|
|
2064 }
|
|
2065 }
|
|
2066 switch (car(e4))
|
|
2067 {case RGVAR: case CRGVAR: case RLVAR: case CRLVAR: case CONST:
|
|
2068 gexpr(e2);
|
|
2069 gexpr(e4);
|
|
2070 break;
|
|
2071 default:
|
|
2072 gexpr(e4);
|
|
2073 pushd();
|
|
2074 gexpr(e2);
|
|
2075 pulld();
|
|
2076 }
|
|
2077 indexx(op,0);
|
|
2078 return;
|
|
2079 }
|
|
2080 assop(e1)
|
|
2081 int e1;
|
|
2082 {int e2,e3,byte,op;
|
|
2083 char *ldop,*stop;
|
|
2084 ldop = ((byte = (car(e1) == CASSOP)) ? "LDB" : "LDD");
|
|
2085 stop = (byte ? "STB" : "STD");
|
|
2086 e2 = cadr(e1);
|
|
2087 e3 = caddr(e1);
|
|
2088 op = cadddr(e1);
|
|
2089 switch (car(e2))
|
|
2090 {case GVAR: case LVAR:
|
|
2091 switch (car(e3))
|
|
2092 {case RGVAR: case RLVAR: case CONST:
|
|
2093 if (simpop(op))
|
|
2094 { index(ldop,e2);
|
|
2095 sextend(byte);
|
|
2096 oprt(op,e3);
|
|
2097 index(stop,e2);
|
|
2098 return;
|
|
2099 }
|
|
2100 default:
|
|
2101 gexpr(e3);
|
|
2102 pushd();
|
|
2103 index(ldop,e2);
|
|
2104 sextend(byte);
|
|
2105 tosop(op);
|
|
2106 index(stop,e2);
|
|
2107 return;
|
|
2108 }
|
|
2109 default:
|
|
2110 switch (car(e3))
|
|
2111 {case RGVAR: case RLVAR: case CONST:
|
|
2112 if (simpop(op))
|
|
2113 { gexpr(e2);
|
|
2114 indexx(ldop,0);
|
|
2115 sextend(byte);
|
|
2116 oprt(op,e3);
|
|
2117 indexx(stop,0);
|
|
2118 return;
|
|
2119 }
|
|
2120 default:
|
|
2121 gexpr(e3);
|
|
2122 pushd();
|
|
2123 gexpr(e2);
|
|
2124 indexx(ldop,0);
|
|
2125 sextend(byte);
|
|
2126 tosop(op);
|
|
2127 indexx(stop,0);
|
|
2128 return;
|
|
2129 }
|
|
2130 }
|
|
2131 }
|
|
2132 simpop(op)
|
|
2133 int op;
|
|
2134 { return (op == ADD || op == SUB ||
|
|
2135 op == BAND || op == EOR || op == BOR);
|
|
2136 }
|
|
2137 oprt(op,e1)
|
|
2138 int op,e1;
|
|
2139 {int e2;
|
|
2140 e2 = cadr(e1);
|
|
2141 switch (car(e1))
|
|
2142 {case RGVAR:
|
|
2143 oprt1(op,"Y",e2);
|
|
2144 return;
|
|
2145 case RLVAR:
|
|
2146 oprt1(op,"U",e2);
|
|
2147 return;
|
|
2148 case CONST:
|
|
2149 oprtc(op,e2);
|
|
2150 return;
|
|
2151 }
|
|
2152 }
|
|
2153 oprt1(op,index,n)
|
|
2154 int op,n;
|
|
2155 char *index;
|
|
2156 { switch (op)
|
|
2157 {case ADD:
|
|
2158 printf("\tADDD\t%d,%s\n",n,index);
|
|
2159 return;
|
|
2160 case SUB:
|
|
2161 printf("\tSUBD\t%d,%s\n",n,index);
|
|
2162 return;
|
|
2163 case BAND: case EOR: case BOR:
|
|
2164 dualop(op,index,n);
|
|
2165 return;
|
|
2166 }
|
|
2167 }
|
|
2168 dualop(op,index,n)
|
|
2169 int op;
|
|
2170 char *index;
|
|
2171 int n;
|
|
2172 {char *ops;
|
|
2173 ops = ((op == BAND) ? "AND" :
|
|
2174 (op == EOR) ? "EOR" :
|
|
2175 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2176 printf("\t%sA\t%d,%s\n\t%sB\t%d+1,%s\n",ops,n,index,ops,n,index);
|
|
2177 }
|
|
2178
|
|
2179 oprtc(op,n)
|
|
2180 int op,n;
|
|
2181 { switch (op)
|
|
2182 {case ADD:
|
|
2183 adddim(n);
|
|
2184 return;
|
|
2185 case SUB:
|
|
2186 subdim(n);
|
|
2187 return;
|
|
2188 case BAND: case EOR: case BOR:
|
|
2189 dualc(op,n);
|
|
2190 return;
|
|
2191 }
|
|
2192 }
|
|
2193 dualc(op,n)
|
|
2194 int op;
|
|
2195 int n;
|
|
2196 {char *ops;
|
|
2197 ops = ((op == BAND) ? "AND" :
|
|
2198 (op == EOR) ? "EOR" :
|
|
2199 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2200 printf("\t%sA\t#%d\n\t%sB\t#%d\n",ops,(n >> 8) & 0xff,ops,n & 0xff);
|
|
2201 }
|
|
2202 tosop(op)
|
|
2203 int op;
|
|
2204 { switch (op)
|
|
2205 {case ADD:
|
|
2206 addds();
|
|
2207 return;
|
|
2208 case SUB:
|
|
2209 subds();
|
|
2210 return;
|
|
2211 case BAND: case EOR: case BOR:
|
|
2212 dualtosop(op);
|
|
2213 return;
|
|
2214 default:
|
|
2215 pulx();
|
|
2216 library(op);
|
|
2217 }
|
|
2218 }
|
|
2219 dualtosop(op)
|
|
2220 int op;
|
|
2221 {char *ops;
|
|
2222 ops = ((op == BAND) ? "AND" :
|
|
2223 (op == EOR) ? "EOR" :
|
|
2224 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2225 printf("\t%sA\t,S+\n\t%sB\t,S+\n",ops,ops);
|
|
2226 }
|
|
2227 pushd()
|
|
2228 { printf("\tPSHS\tD\n");
|
|
2229 }
|
|
2230 pushx()
|
|
2231 { printf("\tPSHS\tX\n");
|
|
2232 }
|
|
2233 pulld()
|
|
2234 { printf("\tPULS\tD\n");
|
|
2235 }
|
|
2236 pulx()
|
|
2237 { printf("\tPULS\tX\n");
|
|
2238 }
|
|
2239 tfrdx()
|
|
2240 { printf("\tTFR\tD,X\n");
|
|
2241 }
|
|
2242 tfrxd()
|
|
2243 { printf("\tTFR\tX,D\n");
|
|
2244 }
|
|
2245 /*
|
|
2246 exgdx()
|
|
2247 { printf("\tEXG\tD,X\n");
|
|
2248 }
|
|
2249 */
|
|
2250 asld()
|
|
2251 { printf("\tASLB\n\tROLA\n");
|
|
2252 }
|
|
2253 adddim(n)
|
|
2254 { printf("\tADDD\t#%d\n",n);
|
|
2255 }
|
|
2256 subdim(n)
|
|
2257 { printf("\tSUBD\t#%d\n",n);
|
|
2258 }
|
|
2259 cmpdimm(n)
|
|
2260 int n;
|
|
2261 { printf("\tCMPD\t#%d\n",n);
|
|
2262 }
|
|
2263 addds()
|
|
2264 { printf("\tADDD\t,S++\n");
|
|
2265 }
|
|
2266 subds()
|
|
2267 { printf("\tSUBD\t,S++\n");
|
|
2268 }
|
|
2269 clrd()
|
|
2270 { printf("\tCLRA\n\tCLRB\n");
|
|
2271 }
|
|
2272 lddim(n)
|
|
2273 int n;
|
|
2274 { printf("\tLDD\t#%d\n",n);
|
|
2275 }
|
|
2276
|
|
2277 ldd(e)
|
|
2278 int e;
|
|
2279 { switch (car(e))
|
|
2280 {case GVAR:
|
|
2281 lddy(cadr(e));
|
|
2282 return;
|
|
2283 case LVAR:
|
|
2284 lddu(cadr(e));
|
|
2285 return;
|
|
2286 default:
|
|
2287 DEBUG;
|
|
2288 }
|
|
2289 }
|
|
2290
|
|
2291 lddx()
|
|
2292 { printf("\tLDD\t,X\n");
|
|
2293 }
|
|
2294 lddy(n)
|
|
2295 int n;
|
|
2296 { printf("\tLDD\t%d,Y\n",n);
|
|
2297 }
|
|
2298 lddu(n)
|
|
2299 int n;
|
|
2300 { printf("\tLDD\t%d,U\n",n);
|
|
2301 }
|
|
2302
|
|
2303 std(e)
|
|
2304 int e;
|
|
2305 { switch (car(e))
|
|
2306 {case GVAR:
|
|
2307 stdy(cadr(e));
|
|
2308 return;
|
|
2309 case LVAR:
|
|
2310 stdu(cadr(e));
|
|
2311 return;
|
|
2312 default:
|
|
2313 DEBUG;
|
|
2314 }
|
|
2315 }
|
|
2316 stdx()
|
|
2317 { printf("\tSTD\t,X\n");
|
|
2318 }
|
|
2319 stdy(n)
|
|
2320 int n;
|
|
2321 { printf("\tSTD\t%d,Y\n",n);
|
|
2322 }
|
|
2323 stdu(n)
|
|
2324 int n;
|
|
2325 { printf("\tSTD\t%d,U\n",n);
|
|
2326 }
|
|
2327
|
|
2328 ldbx()
|
|
2329 { printf("\tLDB\t,X\n");
|
|
2330 }
|
|
2331 /*
|
|
2332 stbx()
|
|
2333 { printf("\tSTB\t,X\n");
|
|
2334 }
|
|
2335 */
|
|
2336 ldby(n)
|
|
2337 int n;
|
|
2338 { printf("\tLDB\t%d,Y\n",n);
|
|
2339 }
|
|
2340 ldbu(n)
|
|
2341 int n;
|
|
2342 { printf("\tLDB\t%d,U\n",n);
|
|
2343 }
|
|
2344 predecx(op,l)
|
|
2345 char *op;
|
|
2346 int l;
|
|
2347 { printf("\t%s\t,%sX\n",op,(l == -1 ? "-" : "--"));
|
|
2348 }
|
|
2349 postincx(op,l)
|
|
2350 char *op;
|
|
2351 int l;
|
|
2352 { printf("\t%s\t,X%s\n",op,(l == 1 ? "+" : "++"));
|
|
2353 }
|
|
2354 leaxy(n)
|
|
2355 int n;
|
|
2356 { printf("\tLEAX\t%d,Y\n",n);
|
|
2357 }
|
|
2358 leaxu(n)
|
|
2359 int n;
|
|
2360 { printf("\tLEAX\t%d,U\n",n);
|
|
2361 }
|
|
2362 leaxpcr(n)
|
|
2363 NMTBL *n;
|
|
2364 { printf("\tLEAX\t%s,PCR\n",n->nm);
|
|
2365 }
|
|
2366
|
|
2367 ldx(e)
|
|
2368 int e;
|
|
2369 { switch (car(e))
|
|
2370 {case GVAR: case RGVAR:
|
|
2371 ldxy(cadr(e));
|
|
2372 return;
|
|
2373 case LVAR: case RLVAR:
|
|
2374 ldxu(cadr(e));
|
|
2375 return;
|
|
2376 default:
|
|
2377 DEBUG;
|
|
2378 }
|
|
2379 }
|
|
2380
|
|
2381 ldxy(n)
|
|
2382 int n;
|
|
2383 { printf("\tLDX\t%d,Y\n",n);
|
|
2384 }
|
|
2385 ldxu(n)
|
|
2386 int n;
|
|
2387 { printf("\tLDX\t%d,U\n",n);
|
|
2388 }
|
|
2389 /*
|
|
2390 ldxi(n)
|
|
2391 int n;
|
|
2392 { printf("\tLDX\t#%d\n",n);
|
|
2393 }
|
|
2394 */
|
|
2395 stx(e)
|
|
2396 int e;
|
|
2397 { switch (car(e))
|
|
2398 {case GVAR:
|
|
2399 stxy(cadr(e));
|
|
2400 return;
|
|
2401 case LVAR:
|
|
2402 stxu(cadr(e));
|
|
2403 return;
|
|
2404 default:
|
|
2405 DEBUG;
|
|
2406 }
|
|
2407 }
|
|
2408
|
|
2409 stxy(n)
|
|
2410 int n;
|
|
2411 { printf("\tSTX\t%d,Y\n",n);
|
|
2412 }
|
|
2413 stxu(n)
|
|
2414 int n;
|
|
2415 { printf("\tSTX\t%d,U\n",n);
|
|
2416 }
|
|
2417
|
|
2418 sex()
|
|
2419 { printf("\tSEX\n");
|
|
2420 }
|
|
2421 incx()
|
|
2422 { printf("\tINC\t,X\n");
|
|
2423 }
|
|
2424 decx()
|
|
2425 { printf("\tDEC\t,X\n");
|
|
2426 }
|
|
2427 opdx(op)
|
|
2428 char *op;
|
|
2429 { printf("\t%s\tD,X\n",op);
|
|
2430 }
|
|
2431 indexx(op,n)
|
|
2432 char *op;
|
|
2433 int n;
|
|
2434 { printf("\t%s\t%d,X\n",op,n);
|
|
2435 }
|
|
2436
|
|
2437 index(op,e)
|
|
2438 char *op;
|
|
2439 int e;
|
|
2440 { switch (car(e))
|
|
2441 {case GVAR:
|
|
2442 indexy(op,cadr(e));
|
|
2443 return;
|
|
2444 case LVAR:
|
|
2445 indexu(op,cadr(e));
|
|
2446 return;
|
|
2447 default:
|
|
2448 DEBUG;
|
|
2449 }
|
|
2450 }
|
|
2451
|
|
2452 indexy(op,n)
|
|
2453 char *op;
|
|
2454 int n;
|
|
2455 { printf("\t%s\t%d,Y\n",op,n);
|
|
2456 }
|
|
2457 indexu(op,n)
|
|
2458 char *op;
|
|
2459 int n;
|
|
2460 { printf("\t%s\t%d,U\n",op,n);
|
|
2461 }
|
|
2462
|
|
2463
|
|
2464 indir(op,e)
|
|
2465 char *op;
|
|
2466 int e;
|
|
2467 { switch (car(e))
|
|
2468 {case RGVAR:
|
|
2469 indiry(op,cadr(e));
|
|
2470 return;
|
|
2471 case RLVAR:
|
|
2472 indiru(op,cadr(e));
|
|
2473 return;
|
|
2474 default:
|
|
2475 DEBUG;
|
|
2476 }
|
|
2477 }
|
|
2478
|
|
2479 indiry(op,n)
|
|
2480 char *op;
|
|
2481 int n;
|
|
2482 { printf("\t%s\t[%d,Y]\n",op,n);
|
|
2483 }
|
|
2484 indiru(op,n)
|
|
2485 char *op;
|
|
2486 int n;
|
|
2487 { printf("\t%s\t[%d,U]\n",op,n);
|
|
2488 }
|
|
2489 sextend(byte)
|
|
2490 int byte;
|
|
2491 { if (byte) sex();
|
|
2492 }
|
|
2493 binexpr(e1)
|
|
2494 int e1;
|
|
2495 { gexpr(caddr(e1));
|
|
2496 pushd();
|
|
2497 gexpr(cadr(e1));
|
|
2498 pulx();
|
|
2499 library(car(e1));
|
|
2500 }
|
|
2501 library(op)
|
|
2502 int op;
|
|
2503 { printf("\tLBSR\t_0000%d\n",
|
|
2504 ((op == MUL || op == UMUL) ? 1 :
|
|
2505 (op == DIV) ? 2 :
|
|
2506 (op == UDIV) ? 3 :
|
|
2507 (op == MOD) ? 4 :
|
|
2508 (op == UMOD) ? 5 :
|
|
2509 (op == LSHIFT) ? 6 :
|
|
2510 (op == ULSHIFT) ? 7 :
|
|
2511 (op == RSHIFT) ? 8 :
|
|
2512 (op == URSHIFT) ? 9 : DEBUG));
|
|
2513 }
|
|
2514 cexpr(e)
|
|
2515 int e;
|
|
2516 { if (car(e) != CONST) error(CNERR);
|
|
2517 return (cadr(e));
|
|
2518 }
|
|
2519
|
|
2520 getsym()
|
|
2521 {NMTBL *nptr0,*nptr1;
|
|
2522 int i;
|
|
2523 char c;
|
|
2524 if (alpha(skipspc()))
|
|
2525 { i = hash = 0;
|
|
2526 while (alpha(ch) || digit(ch))
|
|
2527 { if (i <= 7) hash=7*(hash+(name[i++]=ch));
|
|
2528 getch();
|
|
2529 }
|
|
2530 name[i] = '\0';
|
|
2531 nptr0 = gsearch();
|
|
2532 if (nptr0->sc == RESERVE) return sym = nptr0->dsp;
|
|
2533 if (nptr0->sc == MACRO && !mflag)
|
|
2534 { mflag++;
|
|
2535 chsave = ch;
|
|
2536 chptrsave = chptr;
|
|
2537 chptr = (char *)nptr0->dsp;
|
|
2538 getch();
|
|
2539 return getsym();
|
|
2540 }
|
|
2541 sym = IDENT;
|
|
2542 gnptr=nptr=nptr0;
|
|
2543 if (mode==GDECL || mode==GSDECL || mode==GUDECL ||
|
|
2544 mode==GTDECL || mode==TOP)
|
|
2545 return sym;
|
|
2546 nptr1=lsearch();
|
|
2547 if (mode==STAT)
|
|
2548 if (nptr1->sc == EMPTY) return sym;
|
|
2549 else { nptr=nptr1; return sym;}
|
|
2550 nptr=nptr1;
|
|
2551 return sym;
|
|
2552 }
|
|
2553 else if (digit(ch))
|
|
2554 { symval=0;
|
|
2555 if (ch == '0')
|
|
2556 { if (getch() == 'x' || ch == 'X')
|
|
2557 while(1)
|
|
2558 if(digit(getch()))
|
|
2559 symval=symval*16+ch-'0';
|
|
2560 else if('a'<=ch&&ch<='f')
|
|
2561 symval=symval*16+ch-'a'+10;
|
|
2562 else if('A'<=ch&&ch<='F')
|
|
2563 symval=symval*16+ch-'A'+10;
|
|
2564 else break;
|
|
2565 else while (digit(ch)) {symval=symval*8+ch-'0';getch();}
|
|
2566 }
|
|
2567 else while(digit(ch)) {symval=symval*10+ch-'0';getch();}
|
|
2568 return sym=CONST;
|
|
2569 }
|
|
2570 else if(ch=='\'')
|
|
2571 { getch();
|
|
2572 symval=escape();
|
|
2573 if(ch!='\'') error(CHERR);
|
|
2574 getch();
|
|
2575 return sym=CONST;
|
|
2576 }
|
|
2577 else if(ch=='"')
|
|
2578 { getstring();
|
|
2579 return sym= STRING;
|
|
2580 }
|
|
2581 c=ch;
|
|
2582 getch();
|
|
2583 switch(c)
|
|
2584 {case '*':
|
|
2585 return postequ(MUL,MUL+AS);
|
|
2586 case '&':
|
|
2587 if(ch=='&') {getch();return sym=LAND;}
|
|
2588 return postequ(BAND,BAND+AS);
|
|
2589 case '-':
|
|
2590 if(ch=='>') {getch();return sym=ARROW;}
|
|
2591 if(ch=='-') {getch();return sym=DEC;}
|
|
2592 return postequ(SUB,SUB+AS);
|
|
2593 case '!':
|
|
2594 return postequ(LNOT,NEQ);
|
|
2595 case '~':
|
|
2596 return sym=BNOT;
|
|
2597 case '+':
|
|
2598 if(ch=='+') {getch();return sym=INC;}
|
|
2599 return postequ(ADD,ADD+AS);
|
|
2600 case '%':
|
|
2601 return postequ(MOD,MOD+AS);
|
|
2602 case '^':
|
|
2603 return postequ(EOR,EOR+AS);
|
|
2604 case '|':
|
|
2605 if(ch=='|') {getch();return sym=LOR;}
|
|
2606 return postequ(BOR,BOR+AS);
|
|
2607 case '=':
|
|
2608 return postequ(ASS,EQ);
|
|
2609 case '>':
|
|
2610 if(ch=='>') {getch();return postequ(RSHIFT,RSHIFT+AS);}
|
|
2611 return postequ(GT,GE);
|
|
2612 case '<':
|
|
2613 if(ch=='<') {getch();return postequ(LSHIFT,LSHIFT+AS);}
|
|
2614 return postequ(LT,LE);
|
|
2615 case '(':
|
|
2616 return sym=LPAR;
|
|
2617 case ')':
|
|
2618 return sym=RPAR;
|
|
2619 case '[':
|
|
2620 return sym=LBRA;
|
|
2621 case ']':
|
|
2622 return sym=RBRA;
|
|
2623 case '{':
|
|
2624 return sym=LC;
|
|
2625 case '}':
|
|
2626 return sym=RC;
|
|
2627 case ',':
|
|
2628 return sym=COMMA;
|
|
2629 case ';':
|
|
2630 return sym=SM;
|
|
2631 case ':':
|
|
2632 return sym=COLON;
|
|
2633 case '?':
|
|
2634 return sym=COND;
|
|
2635 case '.':
|
|
2636 return sym=PERIOD;
|
|
2637 case '/':
|
|
2638 if(ch!='*') return postequ(DIV,DIV+AS);
|
|
2639 getch();
|
|
2640 while(ch=='*'?getch()!='/':getch());
|
|
2641 getch();
|
|
2642 return getsym();
|
|
2643 default:
|
|
2644 error(CHERR);
|
|
2645 return getsym();
|
|
2646 }
|
|
2647 }
|
|
2648 postequ(s1,s2)
|
|
2649 int s1,s2;
|
|
2650 { if(ch=='=') {getch();return sym=s2;}
|
|
2651 return sym=s1;
|
|
2652 }
|
|
2653 alpha(c)
|
|
2654 char c;
|
|
2655 { return('a'<=c&&c<='z'||'A'<=c&&c<='Z'||c=='_');
|
|
2656 }
|
|
2657 digit(c)
|
|
2658 char c;
|
|
2659 { return('0'<=c&&c<='9');
|
|
2660 }
|
|
2661 NMTBL *gsearch()
|
|
2662 {NMTBL *nptr,*iptr;
|
|
2663 iptr=nptr= &ntable[hash % GSYMS];
|
|
2664 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
2665 { if (++nptr== &ntable[GSYMS]) nptr=ntable;
|
|
2666 if (nptr==iptr) error(GSERR);
|
|
2667 }
|
|
2668 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
2669 return nptr;
|
|
2670 }
|
|
2671 NMTBL *lsearch()
|
|
2672 {NMTBL *nptr,*iptr;
|
|
2673 iptr=nptr= &ntable[hash%LSYMS+GSYMS];
|
|
2674 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
2675 { if (++nptr== &ntable[LSYMS+GSYMS]) nptr= &ntable[GSYMS];
|
|
2676 if (nptr==iptr) error(LSERR);
|
|
2677 }
|
|
2678 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
2679 return nptr;
|
|
2680 }
|
|
2681 neqname(p)
|
|
2682 char *p;
|
|
2683 {char *q;
|
|
2684 q=name;
|
|
2685 while(*p) if(*p++ != *q++) return 1;
|
|
2686 return *q!=0;
|
|
2687 }
|
|
2688 copy(p)
|
|
2689 char *p;
|
|
2690 {char *q;
|
|
2691 q=name;
|
|
2692 while(*p++= *q++);
|
|
2693 }
|
|
2694 getstring()
|
|
2695 { getch();
|
|
2696 symval = 0;
|
|
2697 sptr = cheapp;
|
|
2698 while (ch != '"')
|
|
2699 { *cheapp++ = escape();
|
|
2700 symval++;
|
|
2701 if (cheapp >= cheap+CHEAPSIZE) error(STRERR);
|
|
2702 }
|
|
2703 getch();
|
|
2704 *cheapp++ = '\0';
|
|
2705 symval++;
|
|
2706 }
|
|
2707 skipspc()
|
|
2708 { while(ch=='\t'||ch=='\n'||ch==' '||ch=='\r') getch();
|
|
2709 return ch;
|
|
2710 }
|
|
2711 getch()
|
|
2712 { if(*chptr) return ch= *chptr++;
|
|
2713 if(mflag) {mflag=0;chptr=chptrsave;return ch=chsave;}
|
|
2714 getline();
|
|
2715 return getch();
|
|
2716 }
|
|
2717 char escape()
|
|
2718 {char c;
|
|
2719 if ((c=ch) == '\\')
|
|
2720 { if (digit(c=getch()))
|
|
2721 { c = ch-'0';
|
|
2722 if (digit(getch()))
|
|
2723 { c = c*8+ch-'0';
|
|
2724 if (digit(getch())) {c=c*8+ch-'0';getch();}
|
|
2725 }
|
|
2726 return c;
|
|
2727 }
|
|
2728 getch();
|
|
2729 switch(c)
|
|
2730 {case 'n':
|
|
2731 return '\n';
|
|
2732 case 't':
|
|
2733 return '\t';
|
|
2734 case 'b':
|
|
2735 return '\b';
|
|
2736 case 'r':
|
|
2737 return '\r';
|
|
2738 case 'f':
|
|
2739 return '\f';
|
|
2740 case '\n':
|
|
2741 return escape();
|
|
2742 default:
|
|
2743 return c;
|
|
2744 }
|
|
2745 }
|
|
2746 if (c == '\n') error(EXERR);
|
|
2747 getch();
|
|
2748 return c;
|
|
2749 }
|
|
2750 FILE *getfname()
|
|
2751 {int i;
|
|
2752 char name[LBUFSIZE];
|
|
2753 getch();
|
|
2754 if(skipspc()!='"') error(INCERR);
|
|
2755 for(i=0;(getch()!='"' && ch!='\n');)
|
|
2756 if(i<LBUFSIZE-1) name[i++]=ch;
|
|
2757 if(ch=='\n') error(INCERR);
|
|
2758 name[i]=0;
|
|
2759 return ( (filep+1)->fcb = fopen(name,"r") );
|
|
2760 }
|
|
2761 getline()
|
|
2762 {int i;
|
|
2763 int c;
|
|
2764 lineno++;
|
|
2765 glineno++;
|
|
2766 chptr=linebuf;
|
|
2767 i=0;
|
|
2768 while ((*chptr++ = c = getc(filep->fcb)) != '\n')
|
|
2769 { if (++i > LBUFSIZE-2) error(LNERR);
|
|
2770 if (c==EOF)
|
|
2771 { error(EOFERR);
|
|
2772 --chptr;
|
|
2773 }
|
|
2774 }
|
|
2775 *chptr = '\0';
|
|
2776 if (lsrc && !asmf) printf("* %s",linebuf);
|
|
2777 if (*(chptr = linebuf) == '#')
|
|
2778 { ++chptr;
|
|
2779 if (macroeq("define"))
|
|
2780 { i=mode;
|
|
2781 mode=GDECL;
|
|
2782 ch= *chptr;
|
|
2783 if (getsym() == IDENT)
|
|
2784 { if (nptr->sc == EMPTY)
|
|
2785 { nptr->sc = MACRO;
|
|
2786 nptr->dsp = (int)cheapp;
|
|
2787 while ((*cheapp++ = c = *chptr++)
|
|
2788 && c != '\n');
|
|
2789 *cheapp++ = '\0';
|
|
2790 if (cheapp >= cheap+CHEAPSIZE)
|
|
2791 error(STRERR);
|
|
2792 if (!c) error(EOFERR);
|
|
2793 }
|
|
2794 else error(MCERR);
|
|
2795 }
|
|
2796 else error(MCERR);
|
|
2797 mode=i;
|
|
2798 *(chptr = linebuf) = '\0';
|
|
2799 }
|
|
2800 else if (macroeq("include"))
|
|
2801 { fprintf(stderr,"%s",linebuf);
|
|
2802 if(filep+1 >= filestack + FILES) error(FILERR);
|
|
2803 if ( ((filep+1)->fcb=getfname()) == NULL) error(FILERR);
|
|
2804 (filep+1)->ln=lineno;
|
|
2805 lineno=0;
|
|
2806 ++filep;
|
|
2807 *(chptr = linebuf) = '\0';
|
|
2808 }
|
|
2809 else if (macroeq("asm"))
|
|
2810 { if (asmf) error(MCERR);
|
|
2811 asmf = 1;
|
|
2812 getline();
|
|
2813 while (asmf)
|
|
2814 { printf("%s",linebuf);
|
|
2815 getline();
|
|
2816 }
|
|
2817 }
|
|
2818 else if (macroeq("endasm"))
|
|
2819 { if (!asmf) error(MCERR);
|
|
2820 asmf = 0;
|
|
2821 }
|
|
2822 else if (macroeq(" "))
|
|
2823 getline();
|
|
2824 else error(MCERR);
|
|
2825 }
|
|
2826 }
|
|
2827
|
|
2828 macroeq(s)
|
|
2829 char *s;
|
|
2830 {char *p;
|
|
2831 for (p = chptr; *s;) if (*s++ != *p++) return 0;
|
|
2832 chptr = p;
|
|
2833 return 1;
|
|
2834 }
|
|
2835
|
|
2836 car(e)
|
|
2837 int e;
|
|
2838 { return heap[e];
|
|
2839 }
|
|
2840 cadr(e)
|
|
2841 int e;
|
|
2842 { return heap[e+1];
|
|
2843 }
|
|
2844 caddr(e)
|
|
2845 int e;
|
|
2846 { return heap[e+2];
|
|
2847 }
|
|
2848 cadddr(e)
|
|
2849 int e;
|
|
2850 { return heap[e+3];
|
|
2851 }
|
|
2852 list2(e1,e2)
|
|
2853 int e1,e2;
|
|
2854 {int e;
|
|
2855 e=getfree(2);
|
|
2856 heap[e]=e1;
|
|
2857 heap[e+1]=e2;
|
|
2858 return e;
|
|
2859 }
|
|
2860 list3(e1,e2,e3)
|
|
2861 int e1,e2,e3;
|
|
2862 {int e;
|
|
2863 e=getfree(3);
|
|
2864 heap[e]=e1;
|
|
2865 heap[e+1]=e2;
|
|
2866 heap[e+2]=e3;
|
|
2867 return e;
|
|
2868 }
|
|
2869 list4(e1,e2,e3,e4)
|
|
2870 int e1,e2,e3,e4;
|
|
2871 {int e;
|
|
2872 e=getfree(4);
|
|
2873 heap[e]=e1;
|
|
2874 heap[e+1]=e2;
|
|
2875 heap[e+2]=e3;
|
|
2876 heap[e+3]=e4;
|
|
2877 return e;
|
|
2878 }
|
|
2879 getfree(n)
|
|
2880 int n;
|
|
2881 {int e;
|
|
2882 switch (mode)
|
|
2883 {case GDECL: case GSDECL: case GUDECL: case GTDECL:
|
|
2884 e=gfree;
|
|
2885 gfree+=n;
|
|
2886 break;
|
|
2887 default:
|
|
2888 lfree-=n;
|
|
2889 e=lfree;
|
|
2890 }
|
|
2891 if(lfree<gfree) error(HPERR);
|
|
2892 return e;
|
|
2893 }
|
|
2894 rplacad(e,n)
|
|
2895 int e,n;
|
|
2896 { heap[e+1]=n;
|
|
2897 return e;
|
|
2898 }
|