99
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1
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2 #define DEBUG error(-1)
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3
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102
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4 #include "mclibos9.c"
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99
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5
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6 #define INT (-1)
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7 #define CHAR (-2)
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8 #define UNSIGNED (-3)
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9 #define POINTER (-4)
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10 #define ARRAY (-5)
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11 #define STRUCT (-6)
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12 #define UNION (-7)
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13 #define FUNCTION (-8)
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14 #define EMPTY (-9)
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15
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16 #define STATIC (-10)
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17 #define GOTO (-11)
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18 #define RETURN (-12)
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19 #define BREAK (-13)
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20 #define CONTINUE (-14)
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21 #define IF (-15)
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22 #define ELSE (-16)
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23 #define FOR (-17)
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24 #define DO (-18)
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25 #define WHILE (-19)
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26 #define SWITCH (-20)
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27 #define CASE (-21)
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28 #define DEFAULT (-22)
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29 #define RESERVE (-23)
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30 #define TAG (-24)
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31 #define FIELD (-25)
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32 #define IDENT (-26)
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33 #define STRING (-27)
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34 #define MACRO (-28)
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35 #define BLABEL (-29)
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36 #define FLABEL (-30)
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37 #define TYPEDEF (-31)
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38 #define SIZEOF (-32)
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39 #define TYPE (-33)
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40 #define LONG (-34)
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41 #define SHORT (-35)
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42
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43 #define TOP 0
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44 #define GDECL 1
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45 #define GSDECL 2
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46 #define GUDECL 3
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47 #define ADECL 4
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48 #define LDECL 5
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49 #define LSDECL 6
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50 #define LUDECL 7
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51 #define STADECL 8
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52 #define STAT 9
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53 #define GTDECL 10
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54 #define LTDECL 11
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55
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56 #define GVAR 1
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57 #define RGVAR 2
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58 #define CRGVAR 3
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59 #define LVAR 4
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60 #define RLVAR 5
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61 #define CRLVAR 6
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62 #define CONST 7
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63 #define FNAME 8
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64 #define INDIRECT 9
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65 #define RINDIRECT 10
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66 #define CRINDIRECT 11
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67 #define ADDRESS 12
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68 #define MINUS 13
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69 #define LNOT 14
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70 #define BNOT 15
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71 #define INC 16
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72 #define POSTINC 17
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73 #define PREINC 18
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74 #define CPOSTINC 19
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75 #define CPREINC 20
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76 #define DEC 21
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77 #define CPOSTDEC 22
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78 #define CPREDEC 23
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79 #define MUL 24
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80 #define UMUL 25
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81 #define DIV 26
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82 #define UDIV 27
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83 #define MOD 28
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84 #define UMOD 29
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85 #define ADD 30
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86 #define SUB 31
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87 #define RSHIFT 32
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88 #define URSHIFT 33
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89 #define LSHIFT 34
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90 #define ULSHIFT 35
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91 #define GT 36
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92 #define UGT 37
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93 #define GE 38
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94 #define UGE 39
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95 #define LT 40
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96 #define ULT 41
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97 #define LE 42
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98 #define ULE 43
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99 #define EQ 44
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100 #define NEQ 45
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101 #define BAND 46
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102 #define EOR 47
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103 #define BOR 48
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104 #define LAND 49
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105 #define LOR 50
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106 #define COND 51
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107 #define ASS 52
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108 #define CASS 53
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109 #define ASSOP 54
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110 #define CASSOP 55
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111 #define COMMA 56
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112 #define LPAR 57
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113 #define RPAR 58
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114 #define LBRA 59
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115 #define RBRA 60
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116 #define LC 61
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117 #define RC 62
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118 #define COLON 63
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119 #define SM 64
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120 #define PERIOD 65
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121 #define ARROW 66
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122
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123 #define US 1
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124 #define AS 100
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125
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126 #define FILERR 1
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127 #define DCERR 2
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128 #define STERR 3
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129 #define EXERR 4
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130 #define CNERR 5
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131 #define CHERR 6
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132 #define GSERR 7
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133 #define LSERR 8
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134 #define STRERR 9
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135 #define LNERR 10
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136 #define EOFERR 11
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137 #define MCERR 12
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138 #define INCERR 13
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139 #define HPERR 14
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140 #define TYERR 15
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141 #define LVERR 16
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142 #define UDERR 17
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143 #define OPTION 18
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144
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145 #define GSYMS 450
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146 #define LSYMS 50
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147
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148 #define HEAPSIZE 700
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149 #define CHEAPSIZE 3000
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150 #define LBUFSIZE 256
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151
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152 #define FILES 3
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153
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154 int sym,ch,chsave,type,mode,gfree,lfree,mflag,lineno,glineno;
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155 int labelno,gpc,lvar,disp;
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156 int symval,args,heap[HEAPSIZE];
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157 int blabel,clabel,dlabel,cslabel,ilabel,control,ac,ac2,lsrc,chk,asmf;
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158
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159 unsigned hash;
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160
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161 char linebuf[LBUFSIZE],cheap[CHEAPSIZE],*chptr,*chptrsave;
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162 char name[9],*cheapp,**av,/*obuf[320],*/*sptr,escape();
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163
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164 FILE *obuf;
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165
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166 typedef struct nametable {
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167 char nm[9];
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168 int sc,ty,dsp; } NMTBL;
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169
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170 NMTBL ntable[GSYMS+LSYMS],*nptr,*gnptr,*decl0(),*decl1(),*lsearch(),*gsearch();
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171
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172 struct {int fd,ln;/*char fcb[320]*/FILE *fcb;} *filep,filestack[FILES];
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173
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174 main(argc,argv)
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175 int argc;
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176 char **argv;
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177 {NMTBL *nptr;
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178 int i;
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102
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179 char *ccout,*modname;
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99
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180 if(argc==1) exit(1);
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181 lsrc = chk = asmf = 0;
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182 ccout = "C.OUT";
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102
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183 modname = "aout";
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99
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184 ac=argc;
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185 av=argv;
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186 for (ac2=1; (ac2 < ac) && (*av[ac2] == '-'); ++ac2)
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187 switch (*(av[ac2]+1))
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188 {case 'S': case 's':
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189 lsrc = 1;
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190 break;
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191 case 'O': case 'o':
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192 ccout = av[ac2]+2;
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193 break;
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102
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194 case 'M': case 'm':
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195 modname = av[ac2]+2;
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196 break;
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99
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197 case 'C': case 'c':
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198 chk = 1;
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199 break;
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200 default:
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201 error(OPTION);
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202 exit(1);
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203 }
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204 fclose(stdout);
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102
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205 if (!chk) {
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206 if ( (obuf = fopen(ccout,"w")) == NULL ) error(FILERR);
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207 else {
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104
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208 printf("\tmod _eom,_name,_tylg,_atrv,_start,_GLOBALS\n"); /* os9 module header */
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209 printf("_name fcs /%s/\n\tfcb 0\n",modname);
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102
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210 }
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211 }
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99
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212 init();
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213 while(1)
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214 { for (nptr = &ntable[GSYMS],i=LSYMS; i--;)
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215 (nptr++)->sc = EMPTY;
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216 mode=TOP;
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217 while(getsym()==SM);
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218 mode=GDECL;
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219 args=0;
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220 decl();
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221 }
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222 }
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223 error(n)
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224 int n;
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225 { if(n == EOFERR)
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226 if(filep!=filestack)
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227 { lineno=filep->ln;
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228 fclose(filep->fcb);
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229 fprintf(stderr,"End of inclusion.\n");
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230 --filep;
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231 return;
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232 }
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233 else if(ac2!=ac)
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234 { fclose(filep->fcb);
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235 newfile();
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236 return;
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237 }
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238 else if(mode == TOP)
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239 { fprintf(stderr,"\nCompiled %u lines.\n",glineno-1);
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240 if (!chk) fprintf(stderr,
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241 "Total internal labels : %u.\n",labelno-1);
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242 fprintf(stderr,
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243 "Total global variables : %u bytes.\n\n",gpc);
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244 printf("_%d\tRTS\n_INITIALIZE\tEQU\t_1\n",ilabel);
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100
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245 printf("_GLOBALS\tEQU\t%u\n",gpc);
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99
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246 exit(0);
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247 }
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248 fprintf(stderr,"%5d:%s.\n",lineno,
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249 (n==FILERR) ? "Can't open specified file" :
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250 (n==DCERR) ? "Declaration syntax" :
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251 (n==STERR) ? "Statement syntax" :
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252 (n==EXERR) ? "Expression syntax" :
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253 (n==CNERR) ? "Constant required" :
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254 (n==CHERR) ? "Illegal character" :
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255 (n==GSERR) ? "Too many global symbols" :
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256 (n==LSERR) ? "Too many local symbols" :
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257 (n==STRERR) ? "Too many strings or macros" :
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258 (n==LNERR) ? "Line too long" :
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259 (n==EOFERR) ? "Unexpected end of file" :
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260 (n==MCERR) ? "Macro syntax" :
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261 (n==INCERR) ? "Include syntax" :
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262 (n==HPERR) ? "Too long expression" :
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263 (n==TYERR) ? "Type mismatch" :
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264 (n==LVERR) ? "Lvalue required" :
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265 (n==UDERR) ? "Undeclared identifier" :
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266 (n==OPTION) ? "Illegal option" :
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267 "Bug of compiler");
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268 errmsg();
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269 exit(1);
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270 }
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271 errmsg()
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272 {char *p,*lim;
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273 if(lineno==0) return;
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274 fprintf(stderr,"%s",linebuf);
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275 lim=(mflag?chptrsave:chptr);
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276 for (p=linebuf; p < lim;)
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277 fprintf(stderr,(*p++ == '\t') ? "\t" : " ");
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278 fprintf (stderr,"^\n");
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279 }
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280 checksym(s)
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281 int s;
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282 {char *p;
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283 if (sym != s)
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284 { p=(s==RPAR) ? "')'": (s==RBRA) ? "']'": (s==SM) ? "';'":
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285 (s==LPAR) ? "'('": (s==WHILE) ? "'while'":
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286 (s==COLON) ? "':'": "Identifier";
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287 fprintf(stderr,"%d:%s expected.\n",lineno,p);
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288 errmsg();
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289 }
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290 else getsym();
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291 }
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292 init()
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293 {NMTBL *nptr;
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294 int i;
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295 for(nptr = ntable,i = GSYMS; i--;) (nptr++)->sc = EMPTY;
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296 reserve("int",INT);
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297 reserve("void",INT);
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298 reserve("char",CHAR);
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299 reserve("struct",STRUCT);
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300 reserve("union",UNION);
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301 reserve("unsigned",UNSIGNED);
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302 reserve("static",STATIC);
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303 reserve("goto",GOTO);
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304 reserve("return",RETURN);
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305 reserve("break",BREAK);
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306 reserve("continue",CONTINUE);
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307 reserve("if",IF);
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308 reserve("else",ELSE);
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309 reserve("for",FOR);
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310 reserve("do",DO);
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311 reserve("while",WHILE);
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312 reserve("switch",SWITCH);
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313 reserve("case",CASE);
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314 reserve("default",DEFAULT);
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315 reserve("typedef",TYPEDEF);
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316 reserve("sizeof",SIZEOF);
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317 reserve("long",LONG);
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318 reserve("short",SHORT);
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319 gpc=glineno=mflag=0;
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320 gfree=ilabel=1;
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321 labelno=2;
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322 cheapp=cheap;
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323 lfree=HEAPSIZE;
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324 filep=filestack;
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325 newfile();
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326 getline();
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327 getch();
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328 }
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329 newfile()
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330 { lineno=0;
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331 fprintf(stderr,"%s:\n",av[ac2]);
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332 if ( (filep->fcb = fopen(av[ac2++],"rc")) == NULL ) error(FILERR);
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333 }
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334 reserve(s,d)
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335 char *s;
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336 int d;
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337 {NMTBL *nptr;
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338 char *t;
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339 hash=0;
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340 t=name;
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341 while(*t++ = *s) hash=7*(hash+*s++);
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342 (nptr = gsearch())->sc = RESERVE;
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343 nptr->dsp = d;
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344 }
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345
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346 decl()
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347 {NMTBL *n;
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348 int t;
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349 if(sym==STATIC)
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350 if(mode==LDECL)
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351 { getsym();
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352 mode=STADECL;
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353 }
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354 else error(DCERR);
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355 else if(sym==TYPEDEF)
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356 if(mode==GDECL)
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357 { getsym();
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358 mode=GTDECL;
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359 }
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360 else if(mode==LDECL)
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361 { getsym();
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362 mode=LTDECL;
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363 }
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364 else error(DCERR);
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365 if((t=typespec())==0) return;
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366 if(sym==SM) return;
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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||sym==LC) {fdecl(n);return;}
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371 def(n);
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372 while(sym==COMMA)
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373 { getsym();
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374 type=t;
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375 n=decl0();
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376 reverse(t);
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377 if(args) error(DCERR);
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378 def(n);
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379 }
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380 if(sym!=SM) error(DCERR);
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381 if(mode==GTDECL) mode=GDECL;
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382 if(mode==STADECL||mode==LTDECL) mode=LDECL;
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383 }
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384 typespec()
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385 {int t;
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386 switch(sym)
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387 {case INT:
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388 case CHAR:
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389 t= sym;
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390 getsym();
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391 break;
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392 case STRUCT:
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393 case UNION:
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394 t=sdecl(sym);
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395 break;
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396 case UNSIGNED:
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397 t = UNSIGNED;
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398 if(getsym()==INT) getsym();
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399 break;
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400 case SHORT:
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401 t=CHAR;
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402 if(getsym()==INT) getsym();
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403 break;
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404 case LONG:
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405 t=INT;
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406 if(getsym()==INT) getsym();
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407 break;
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408 default:
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409 if(sym==IDENT)
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410 if(nptr->sc==TYPE)
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411 { t=nptr->ty;
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412 getsym();
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413 break;
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414 }
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415 else if(nptr->sc==EMPTY && gnptr->sc==TYPE)
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416 { t=gnptr->ty;
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417 getsym();
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418 break;
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419 }
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420 if(mode==LDECL) return 0;
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421 t= INT;
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422 }
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423 return t;
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424 }
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425 struct nametable *decl0()
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426 {NMTBL *n;
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427 if(sym==MUL)
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428 { getsym();
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429 n=decl0();
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430 type=list2(POINTER,type);
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431 return n;
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432 }
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433 return decl1();
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434 }
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435 NMTBL *decl1()
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436 {NMTBL *n;
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437 int i,t;
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438 if(sym==LPAR)
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439 { getsym();
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440 n=decl0();
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441 checksym(RPAR);
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442 }
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443 else if (sym == IDENT)
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444 { n=nptr;
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445 getsym();
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446 }
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447 else error(DCERR);
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448 while(1)
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449 if(sym==LBRA)
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450 if(getsym()==RBRA)
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451 { getsym();
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452 if(mode!=ADECL) error(DCERR);
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453 t=type;
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454 type=list2(POINTER,type);
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455 }
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456 else
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457 { t=type;
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458 i=cexpr(expr());
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459 checksym(RBRA);
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460 type=list3(ARRAY,t,i);
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461 }
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462 else if(sym==LPAR)
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463 { if(mode==GDECL) {mode=ADECL;getsym();mode=GDECL;}
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464 else getsym();
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465 if(sym==RPAR) getsym();
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466 else
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467 { n->sc=FUNCTION;
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468 adecl();
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469 n->sc=EMPTY;
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470 }
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471 type=list2(FUNCTION,type);
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472 }
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473 else return n;
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474 }
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475 adecl()
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476 { if(mode!=GDECL) error(DCERR);
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477 mode=ADECL;
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478 args= 2;
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479 while(1)
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480 { if(sym!=IDENT) error(DCERR);
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481 nptr->ty = INT;
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482 nptr->sc = LVAR;
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483 nptr->dsp = (args += 2);
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484 if(getsym()!=COMMA) break;
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485 getsym();
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486 }
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487 checksym(RPAR);
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488 mode=GDECL;
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489 return;
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490 }
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491 reverse(t1)
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492 int t1;
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493 {int t2,t3;
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494 t2=t1;
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495 while(type!=t1)
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496 { t3=cadr(type);
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497 rplacad(type,t2);
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498 t2=type;
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499 type=t3;
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500 }
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501 type=t2;
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502 }
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503 size(t)
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504 int t;
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505 { if(t==CHAR) return 1;
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506 if(scalar(t)) return 2;
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507 if(car(t)==STRUCT||car(t)==UNION)
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508 { if(cadr(t)==-1) error(DCERR);
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509 return(cadr(t));
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510 }
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511 if(car(t)==ARRAY) return(size(cadr(t))*caddr(t));
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512 else error(DCERR);
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513 /*NOTREACHED*/
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514 }
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515 def(n)
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516 NMTBL *n;
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517 {int sz,nsc,ndsp,slfree,l,t,e;
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518 if(car(type)==FUNCTION)
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519 { fcheck(n);
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520 return;
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521 }
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522 if (n->sc!=EMPTY &&
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523 (mode!=ADECL || n->sc!=LVAR || n->ty!=INT) &&
|
|
524 (mode!=GSDECL&&mode!=LSDECL || n->sc!=FIELD || n->dsp!=disp) &&
|
|
525 (mode!=GUDECL&&mode!=LUDECL || n->sc!=FIELD || n->dsp!=0) )
|
|
526 error(DCERR);
|
|
527 sz = size(n->ty = type);
|
|
528 switch(mode)
|
|
529 {case GDECL:
|
|
530 printf("%s\tEQU\t%u\n",n->nm,gpc);
|
|
531 case STADECL:
|
|
532 nsc = GVAR;
|
|
533 ndsp = gpc;
|
|
534 if(sym==ASS)
|
|
535 { t=type;
|
|
536 if(!scalar(t))
|
|
537 error(TYERR);
|
|
538 if(mode==STADECL) printf("\tBRA\t_%d\n",l=fwdlabel());
|
|
539 fwddef(ilabel);
|
|
540 getsym();
|
|
541 slfree=lfree;
|
|
542 e=expr1();
|
|
543 if(car(e)==CONST)
|
|
544 { lddim(cadr(e));
|
|
545 indexy(t==CHAR?"STB":"STD",gpc);
|
|
546 }
|
|
547 else if(t!=CHAR)
|
|
548 { if(car(e)==ADDRESS&&car(cadr(e))==GVAR)
|
|
549 leaxy(cadr(cadr(e)));
|
|
550 else if(car(e)==FNAME)
|
|
551 leaxpcr((NMTBL *)cadr(e));
|
|
552 else error(TYERR);
|
|
553 stxy(gpc);
|
|
554 }
|
|
555 else error(TYERR);
|
|
556 lfree=slfree;
|
|
557 jmp(ilabel=fwdlabel());
|
|
558 if(mode==STADECL) fwddef(l);
|
|
559 type=t;
|
|
560 }
|
|
561 gpc +=sz;
|
|
562 break;
|
|
563 case GSDECL:
|
|
564 nsc = FIELD;
|
|
565 ndsp = disp;
|
|
566 disp += sz;
|
|
567 break;
|
|
568 case GUDECL:
|
|
569 nsc = FIELD;
|
|
570 ndsp = 0;
|
|
571 if (disp < sz) disp = sz;
|
|
572 break;
|
|
573 case GTDECL:
|
|
574 nsc = TYPE;
|
|
575 break;
|
|
576 case ADECL:
|
|
577 if(type==CHAR) ++(n->dsp);
|
|
578 else if (!scalar(type)) error(TYERR);
|
|
579 return;
|
|
580 case LDECL:
|
|
581 nsc = LVAR;
|
|
582 ndsp = (disp -= sz);
|
|
583 break;
|
|
584 case LSDECL:
|
|
585 nsc = FIELD;
|
|
586 ndsp = disp;
|
|
587 disp += sz;
|
|
588 break;
|
|
589 case LUDECL:
|
|
590 nsc = FIELD;
|
|
591 ndsp = 0;
|
|
592 if (disp < sz) disp = sz;
|
|
593 break;
|
|
594 case LTDECL:
|
|
595 nsc = TYPE;
|
|
596 break;
|
|
597 default:
|
|
598 error(DCERR);
|
|
599 }
|
|
600 n->sc = nsc;
|
|
601 n->dsp = ndsp;
|
|
602 }
|
|
603 sdecl(s)
|
|
604 int s;
|
|
605 {int smode,sdisp,type;
|
|
606 NMTBL *nptr0;
|
|
607 smode=mode;
|
|
608 if (mode==GDECL || mode==GSDECL || mode==GUDECL || mode==GTDECL)
|
|
609 mode=(s==STRUCT?GSDECL:GUDECL);
|
|
610 else mode=(s==STRUCT?LSDECL:LUDECL);
|
|
611 sdisp=disp;
|
|
612 disp=0;
|
|
613 if (getsym() == IDENT)
|
|
614 { nptr0 = nptr;
|
|
615 if (getsym() == LC)
|
|
616 { if (nptr0->sc != EMPTY) error(DCERR);
|
|
617 nptr0->sc = TAG;
|
|
618 nptr0->ty = list2(s,-1);
|
|
619 while (getsym() != RC) decl();
|
|
620 getsym();
|
|
621 rplacad(type = nptr0->ty,disp);
|
|
622 }
|
|
623 else
|
|
624 { if(nptr0->sc == EMPTY) nptr0=gnptr;
|
|
625 if(nptr0->sc == EMPTY) error(UDERR);
|
|
626 if(nptr0->sc != TAG) error(TYERR);
|
|
627 type = nptr0->ty;
|
|
628 }
|
|
629 }
|
|
630 else if(sym==LC)
|
|
631 { while(getsym() != RC) decl();
|
|
632 getsym();
|
|
633 type = list2(s,disp);
|
|
634 }
|
|
635 else error(DCERR);
|
|
636 disp=sdisp;
|
|
637 mode=smode;
|
|
638 return type;
|
|
639 }
|
|
640 fdecl(n)
|
|
641 NMTBL *n;
|
|
642 { args=0;
|
|
643 fcheck(n);
|
|
644 mode=ADECL;
|
|
645 lfree= HEAPSIZE;
|
|
646 while (sym!=LC) {decl(); getsym();}
|
|
647 disp=0;
|
|
648 mode=STAT;
|
|
649 while (typeid(getsym()) || sym==STATIC || sym==TYPEDEF)
|
|
650 { mode=LDECL;
|
|
651 decl();
|
|
652 mode=STAT;
|
|
653 }
|
|
654 control=1;
|
|
655 printf("%s\n\tPSHS\tU\n\tLEAU\t,S\n",n->nm);
|
|
656 if(disp) printf("\tLEAS\t%d,S\n",disp);
|
|
657 lvar= -disp;
|
|
658 while(sym!=RC) statement();
|
|
659 if (control) return2();
|
|
660 }
|
|
661 fcheck(n)
|
|
662 NMTBL *n;
|
|
663 { if(mode!=GDECL||car(type)!=FUNCTION) error(DCERR);
|
|
664 if(n->sc==FUNCTION) compatible(n->ty,cadr(type));
|
|
665 else if(n->sc!=EMPTY) error(DCERR);
|
|
666 n->sc=FUNCTION;
|
|
667 n->ty=cadr(type);
|
|
668 }
|
|
669 compatible(t1,t2)
|
|
670 int t1,t2;
|
|
671 { if(integral(t1))
|
|
672 { if(t1!=t2) error(TYERR);
|
|
673 }
|
|
674 else if(car(t1)!=car(t2)) error(TYERR);
|
|
675 else if((car(t1)==STRUCT || car(t1)==UNION) && cadr(t1)!=cadr(t2))
|
|
676 error(TYERR);
|
|
677 else if(car(t1)==POINTER || car(t1)==ARRAY ||car(t1)==FUNCTION)
|
|
678 compatible(cadr(t1),cadr(t2));
|
|
679 }
|
|
680 scalar(t)
|
|
681 int t;
|
|
682 { return(integral(t)||car(t)==POINTER);
|
|
683 }
|
|
684 integral(t)
|
|
685 int t;
|
|
686 { return(t==INT||t==CHAR||t==UNSIGNED);
|
|
687 }
|
|
688
|
|
689 statement()
|
|
690 {int slfree;
|
|
691 switch(sym)
|
|
692 {case IF:
|
|
693 doif();
|
|
694 return;
|
|
695 case WHILE:
|
|
696 dowhile();
|
|
697 return;
|
|
698 case DO:
|
|
699 dodo();
|
|
700 return;
|
|
701 case FOR:
|
|
702 dofor();
|
|
703 return;
|
|
704 case SWITCH:
|
|
705 doswitch();
|
|
706 return;
|
|
707 case LC:
|
|
708 docomp();
|
|
709 return;
|
|
710 case BREAK:
|
|
711 jmp(blabel);
|
|
712 getsym();
|
|
713 checksym(SM);
|
|
714 return;
|
|
715 case CONTINUE:
|
|
716 jmp(clabel);
|
|
717 getsym();
|
|
718 checksym(SM);
|
|
719 return;
|
|
720 case CASE:
|
|
721 docase();
|
|
722 statement();
|
|
723 return;
|
|
724 case DEFAULT:
|
|
725 dodefault();
|
|
726 statement();
|
|
727 return;
|
|
728 case RETURN:
|
|
729 doreturn();
|
|
730 return;
|
|
731 case GOTO:
|
|
732 dogoto();
|
|
733 return;
|
|
734 case SM:
|
|
735 getsym();
|
|
736 return;
|
|
737 default:if(sym==IDENT&&skipspc()==':')
|
|
738 { dolabel();
|
|
739 statement();
|
|
740 }
|
|
741 else
|
|
742 { slfree=lfree;
|
|
743 gexpr(expr());
|
|
744 lfree=slfree;
|
|
745 checksym(SM);
|
|
746 }
|
|
747 }
|
|
748 }
|
|
749 doif()
|
|
750 {int l1,l2,slfree;
|
|
751 getsym();
|
|
752 checksym(LPAR);
|
|
753 slfree=lfree;
|
|
754 bexpr(expr(),0,l1=fwdlabel());
|
|
755 lfree=slfree;
|
|
756 checksym(RPAR);
|
|
757 statement();
|
|
758 if(sym==ELSE)
|
|
759 { if (l2 = control) jmp(l2=fwdlabel());
|
|
760 fwddef(l1);
|
|
761 getsym();
|
|
762 statement();
|
|
763 if (l2) fwddef(l2);
|
|
764 }
|
|
765 else fwddef(l1);
|
|
766 }
|
|
767 dowhile()
|
|
768 {int sbreak,scontinue,slfree,e;
|
|
769 sbreak=blabel;
|
|
770 scontinue=clabel;
|
|
771 blabel=fwdlabel();
|
|
772 clabel=backdef();
|
|
773 getsym();
|
|
774 checksym(LPAR);
|
|
775 slfree=lfree;
|
|
776 e=expr();
|
|
777 checksym(RPAR);
|
|
778 if(sym==SM)
|
|
779 { bexpr(e,1,clabel);
|
|
780 lfree=slfree;
|
|
781 getsym();
|
|
782 }
|
|
783 else
|
|
784 { bexpr(e,0,blabel);
|
|
785 lfree=slfree;
|
|
786 statement();
|
|
787 jmp(clabel);
|
|
788 }
|
|
789 fwddef(blabel);
|
|
790 clabel=scontinue;
|
|
791 blabel=sbreak;
|
|
792 }
|
|
793 dodo()
|
|
794 {int sbreak,scontinue,l,slfree;
|
|
795 sbreak=blabel;
|
|
796 scontinue=clabel;
|
|
797 blabel=fwdlabel();
|
|
798 clabel=fwdlabel();
|
|
799 l=backdef();
|
|
800 getsym();
|
|
801 statement();
|
|
802 fwddef(clabel);
|
|
803 checksym(WHILE);
|
|
804 checksym(LPAR);
|
|
805 slfree=lfree;
|
|
806 bexpr(expr(),1,l);
|
|
807 lfree=slfree;
|
|
808 checksym(RPAR);
|
|
809 checksym(SM);
|
|
810 fwddef(blabel);
|
|
811 clabel=scontinue;
|
|
812 blabel=sbreak;
|
|
813 }
|
|
814 dofor()
|
|
815 {int sbreak,scontinue,l,e,slfree;
|
|
816 sbreak=blabel;
|
|
817 scontinue=clabel;
|
|
818 blabel=fwdlabel();
|
|
819 getsym();
|
|
820 checksym(LPAR);
|
|
821 slfree=lfree;
|
|
822 if(sym!=SM)
|
|
823 { gexpr(expr());
|
|
824 checksym(SM);
|
|
825 }
|
|
826 else getsym();
|
|
827 lfree=slfree;
|
|
828 l=backdef();
|
|
829 if(sym!=SM)
|
|
830 { bexpr(expr(),0,blabel);
|
|
831 checksym(SM);
|
|
832 }
|
|
833 else getsym();
|
|
834 lfree=slfree;
|
|
835 if(sym==RPAR)
|
|
836 { clabel=l;
|
|
837 getsym();
|
|
838 statement();
|
|
839 }
|
|
840 else
|
|
841 { clabel=fwdlabel();
|
|
842 e=expr();
|
|
843 checksym(RPAR);
|
|
844 statement();
|
|
845 fwddef(clabel);
|
|
846 gexpr(e);
|
|
847 lfree=slfree;
|
|
848 }
|
|
849 jmp(l);
|
|
850 fwddef(blabel);
|
|
851 clabel=scontinue;
|
|
852 blabel=sbreak;
|
|
853 }
|
|
854 doswitch()
|
|
855 {int sbreak,scase,sdefault,slfree;
|
|
856 sbreak=blabel;
|
|
857 blabel=fwdlabel();
|
|
858 sdefault=dlabel;
|
|
859 dlabel=0;
|
|
860 scase=cslabel;
|
|
861 getsym();
|
|
862 checksym(LPAR);
|
|
863 slfree=lfree;
|
|
864 gexpr(expr());
|
|
865 lfree=slfree;
|
|
866 checksym(RPAR);
|
|
867 cslabel = control = 0;
|
|
868 statement();
|
|
869 if(dlabel) printf("_%d\tEQU\t_%d\n",cslabel,dlabel);
|
|
870 else fwddef(cslabel);
|
|
871 cslabel=scase;
|
|
872 dlabel=sdefault;
|
|
873 fwddef(blabel);
|
|
874 blabel=sbreak;
|
|
875 }
|
|
876 docomp()
|
|
877 { getsym();
|
|
878 while(sym!=RC) statement();
|
|
879 getsym();
|
|
880 }
|
|
881 docase()
|
|
882 {int c,n,l,slfree;
|
|
883 c=0;
|
|
884 n=2;
|
|
885 slfree=lfree;
|
|
886 while(sym==CASE)
|
|
887 { getsym();
|
|
888 c=list2(cexpr(expr()),c);
|
|
889 n+=6;
|
|
890 checksym(COLON);
|
|
891 }
|
|
892 l=fwdlabel();
|
|
893 if (control)
|
|
894 { control=0;
|
|
895 if (n>127) jmp(l);
|
|
896 else printf("\tBRA\t_%d\n",l);
|
|
897 }
|
|
898 if (cslabel) fwddef(cslabel);
|
|
899 while(cadr(c))
|
|
900 { cmpdimm(car(c));
|
|
901 if((n-=6)>127) jcond(l,0);
|
|
902 else printf("\tBEQ\t_%d\n",l);
|
|
903 c=cadr(c);
|
|
904 }
|
|
905 lfree=slfree;
|
|
906 cmpdimm(car(c));
|
|
907 jcond(cslabel=fwdlabel(),1);
|
|
908 fwddef(l);
|
|
909 }
|
|
910 dodefault()
|
|
911 { getsym();
|
|
912 checksym(COLON);
|
|
913 if (dlabel) error(STERR);
|
|
914 if (!cslabel) jmp(cslabel = fwdlabel());
|
|
915 dlabel = backdef();
|
|
916 }
|
|
917 doreturn()
|
|
918 {int slfree;
|
|
919 if(getsym()==SM)
|
|
920 { getsym();
|
|
921 return2();
|
|
922 return;
|
|
923 }
|
|
924 slfree=lfree;
|
|
925 gexpr(expr());
|
|
926 lfree=slfree;
|
|
927 checksym(SM);
|
|
928 control=0;
|
|
929 switch(lvar)
|
|
930 {case 0:
|
|
931 ret("");
|
|
932 return;
|
|
933 case 2:
|
|
934 ret("X,");
|
|
935 return;
|
|
936 default:unlink();
|
|
937 return;
|
|
938 }
|
|
939 }
|
|
940 return2()
|
|
941 { control=0;
|
|
942 switch(lvar)
|
|
943 {case 0:
|
|
944 ret("");
|
|
945 return;
|
|
946 case 1:
|
|
947 ret("A,");
|
|
948 return;
|
|
949 case 2:
|
|
950 ret("D,");
|
|
951 return;
|
|
952 case 3:
|
|
953 ret("A,X,");
|
|
954 return;
|
|
955 case 4:
|
|
956 ret("D,X,");
|
|
957 return;
|
|
958 default:unlink();
|
|
959 return;
|
|
960 }
|
|
961 }
|
|
962 ret(reg)
|
|
963 char *reg;
|
|
964 { printf("\tPULS\t%sU,PC\n",reg);
|
|
965 }
|
|
966 unlink()
|
|
967 { printf("\tLEAS\t,U\n");
|
|
968 ret("");
|
|
969 }
|
|
970 dogoto()
|
|
971 {NMTBL *nptr0;
|
|
972 getsym();
|
|
973 nptr0=nptr;
|
|
974 checksym(IDENT);
|
|
975 if(nptr0->sc == BLABEL || nptr0->sc == FLABEL) jmp(nptr0->dsp);
|
|
976 else if(nptr0->sc == EMPTY)
|
|
977 { nptr0->sc = FLABEL;
|
|
978 jmp(nptr0->dsp = fwdlabel());
|
|
979 }
|
|
980 else error(STERR);
|
|
981 checksym(SM);
|
|
982 }
|
|
983 dolabel()
|
|
984 { if(nptr->sc == FLABEL) fwddef(nptr->dsp);
|
|
985 else if(nptr->sc != EMPTY) error(TYERR);
|
|
986 nptr->sc = BLABEL;
|
|
987 nptr->dsp = backdef();
|
|
988 getsym();
|
|
989 checksym(COLON);
|
|
990 }
|
|
991
|
|
992 expr()
|
|
993 { return(rvalue(expr0()));
|
|
994 }
|
|
995 expr0()
|
|
996 {int e;
|
|
997 e=expr1();
|
|
998 while(sym==COMMA) {getsym();e=list3(COMMA,e,rvalue(expr1()));}
|
|
999 return e;
|
|
1000 }
|
|
1001 expr1()
|
|
1002 {int e1,e2,t,op;
|
|
1003 e1=expr2();
|
|
1004 switch (sym)
|
|
1005 {case ASS:
|
|
1006 lcheck(e1);
|
|
1007 t=type;
|
|
1008 getsym();
|
|
1009 e2=rvalue(expr1());
|
|
1010 if(t==CHAR) {type= INT;return(list3(CASS,e1,e2));}
|
|
1011 type=t;
|
|
1012 return(list3(ASS,e1,e2));
|
|
1013 case ADD+AS: case SUB+AS: case MUL+AS: case DIV+AS: case MOD+AS:
|
|
1014 case RSHIFT+AS: case LSHIFT+AS: case BAND+AS: case EOR+AS: case BOR+AS:
|
|
1015 op = sym-AS;
|
|
1016 lcheck(e1);
|
|
1017 t=type;
|
|
1018 getsym();
|
|
1019 e2=rvalue(expr1());
|
|
1020 if(!integral(type)) error(TYERR);
|
|
1021 if((t==UNSIGNED||type==UNSIGNED)&&
|
|
1022 (op==MUL||op==DIV||op==MOD||op==RSHIFT||op==LSHIFT))
|
|
1023 op=op+US;
|
|
1024 if(t==CHAR)
|
|
1025 { type= INT;
|
|
1026 return(list4(CASSOP,e1,e2,op));
|
|
1027 }
|
|
1028 type=t;
|
|
1029 if(integral(t)) return(list4(ASSOP,e1,e2,op));
|
|
1030 if((op!=ADD&&op!=SUB)||car(t)!=POINTER) error(TYERR);
|
|
1031 e2=binop(MUL,e2,list2(CONST,size(cadr(t))),INT,UNSIGNED);
|
|
1032 type=t;
|
|
1033 return list4(ASSOP,e1,e2,op);
|
|
1034 default:
|
|
1035 return(e1);
|
|
1036 }
|
|
1037 }
|
|
1038 expr2()
|
|
1039 {int e1,e2,e3,t;
|
|
1040 e1=expr3();
|
|
1041 if(sym==COND)
|
|
1042 { e1=rvalue(e1);
|
|
1043 getsym();
|
|
1044 e2=rvalue(expr2());
|
|
1045 t=type;
|
|
1046 checksym(COLON);
|
|
1047 e3=rvalue(expr2());
|
|
1048 if(car(e1)==CONST)
|
|
1049 if(cadr(e1)) {type=t;return e2;}
|
|
1050 else return e3;
|
|
1051 if(type==INT||t!=INT&&type==UNSIGNED) type=t;
|
|
1052 return(list4(COND,e1,e2,e3));
|
|
1053 }
|
|
1054 return(e1);
|
|
1055 }
|
|
1056 expr3()
|
|
1057 {int e;
|
|
1058 e=expr4();
|
|
1059 while(sym==LOR)
|
|
1060 { e=rvalue(e);
|
|
1061 getsym();
|
|
1062 e=list3(LOR,e,rvalue(expr4()));
|
|
1063 type= INT;
|
|
1064 }
|
|
1065 return(e);
|
|
1066 }
|
|
1067 expr4()
|
|
1068 {int e;
|
|
1069 e=expr5();
|
|
1070 while(sym==LAND)
|
|
1071 { e=rvalue(e);
|
|
1072 getsym();
|
|
1073 e=list3(LAND,e,rvalue(expr5()));
|
|
1074 type= INT;
|
|
1075 }
|
|
1076 return(e);
|
|
1077 }
|
|
1078 expr5()
|
|
1079 {int e1,e2,t;
|
|
1080 e1=expr6();
|
|
1081 while(sym==BOR)
|
|
1082 { e1=rvalue(e1);
|
|
1083 t=type;
|
|
1084 getsym();
|
|
1085 e2=rvalue(expr6());
|
|
1086 e1=binop(BOR,e1,e2,t,type);
|
|
1087 }
|
|
1088 return(e1);
|
|
1089 }
|
|
1090 expr6()
|
|
1091 {int e1,e2,t;
|
|
1092 e1=expr7();
|
|
1093 while(sym==EOR)
|
|
1094 { e1=rvalue(e1);
|
|
1095 t=type;
|
|
1096 getsym();
|
|
1097 e2=rvalue(expr7());
|
|
1098 e1=binop(EOR,e1,e2,t,type);
|
|
1099 }
|
|
1100 return(e1);
|
|
1101 }
|
|
1102 expr7()
|
|
1103 {int e1,e2,t;
|
|
1104 e1=expr8();
|
|
1105 while(sym==BAND)
|
|
1106 { e1=rvalue(e1);
|
|
1107 t=type;
|
|
1108 getsym();
|
|
1109 e2=rvalue(expr8());
|
|
1110 e1=binop(BAND,e1,e2,t,type);
|
|
1111 }
|
|
1112 return(e1);
|
|
1113 }
|
|
1114 expr8()
|
|
1115 {int e,op;
|
|
1116 e=expr9();
|
|
1117 while((op=sym)==EQ||op==NEQ)
|
|
1118 { e=rvalue(e);
|
|
1119 getsym();
|
|
1120 e=list3(op,e,rvalue(expr9()));
|
|
1121 type= INT;
|
|
1122 }
|
|
1123 return e;
|
|
1124 }
|
|
1125 expr9()
|
|
1126 {int e1,e2,t,op;
|
|
1127 e1=expr10();
|
|
1128 while((op=sym)==GT||op==GE||op==LT||op==LE)
|
|
1129 { e1=rvalue(e1);
|
|
1130 t=type;
|
|
1131 getsym();
|
|
1132 e2=rvalue(expr10());
|
|
1133 if(t==INT&&type==INT) e1=list3(op,e1,e2);
|
|
1134 else e1=list3(op+US,e1,e2);
|
|
1135 type= INT;
|
|
1136 }
|
|
1137 return e1;
|
|
1138 }
|
|
1139 expr10()
|
|
1140 {int e1,e2,t,op;
|
|
1141 e1=expr11();
|
|
1142 while((op=sym)==RSHIFT||op==LSHIFT)
|
|
1143 { e1=rvalue(e1);
|
|
1144 t=type;
|
|
1145 getsym();
|
|
1146 e2=rvalue(expr11());
|
|
1147 e1=binop(op,e1,e2,t,type);
|
|
1148 }
|
|
1149 return e1;
|
|
1150 }
|
|
1151 expr11()
|
|
1152 {int e1,e2,t,op;
|
|
1153 e1=expr12();
|
|
1154 while((op=sym)==ADD||op==SUB)
|
|
1155 { e1=rvalue(e1);
|
|
1156 t=type;
|
|
1157 getsym();
|
|
1158 e2=rvalue(expr12());
|
|
1159 e1=binop(op,e1,e2,t,type);
|
|
1160 }
|
|
1161 return e1;
|
|
1162 }
|
|
1163 expr12()
|
|
1164 {int e1,e2,t,op;
|
|
1165 e1=expr13();
|
|
1166 while((op=sym)==MUL||op==DIV||op==MOD)
|
|
1167 { e1=rvalue(e1);
|
|
1168 t=type;
|
|
1169 getsym();
|
|
1170 e2=rvalue(expr13());
|
|
1171 e1=binop(op,e1,e2,t,type);
|
|
1172 }
|
|
1173 return e1;
|
|
1174 }
|
|
1175 expr13()
|
|
1176 {int e,op;
|
|
1177 switch (op = sym)
|
|
1178 {case INC: case DEC:
|
|
1179 getsym();
|
|
1180 lcheck(e=expr13());
|
|
1181 if(type==CHAR)
|
|
1182 { type= INT;
|
|
1183 return(list2(op==INC?CPREINC:CPREDEC,e));
|
|
1184 }
|
|
1185 if(integral(type))
|
|
1186 return(list3(PREINC,e,op==INC?1:-1));
|
|
1187 if(car(type)!=POINTER) error(TYERR);
|
|
1188 return(list3(PREINC,e,
|
|
1189 op==INC?size(cadr(type)):-size(cadr(type)) ));
|
|
1190 case MUL:
|
|
1191 getsym();
|
|
1192 e=rvalue(expr13());
|
|
1193 return(indop(e));
|
|
1194 case BAND:
|
|
1195 getsym();
|
|
1196 switch(car(e=expr13()))
|
|
1197 {case INDIRECT:
|
|
1198 e=cadr(e);
|
|
1199 break;
|
|
1200 case GVAR:
|
|
1201 case LVAR:
|
|
1202 e=list2(ADDRESS,e);
|
|
1203 break;
|
|
1204 case FNAME:
|
|
1205 return e;
|
|
1206 default:error(LVERR);
|
|
1207 }
|
|
1208 type=list2(POINTER,type);
|
|
1209 return e;
|
|
1210 case SUB:
|
|
1211 getsym();
|
|
1212 e=rvalue(expr13());
|
|
1213 if(!integral(type)) error(TYERR);
|
|
1214 return(car(e)==CONST?list2(CONST,-cadr(e)):list2(MINUS,e));
|
|
1215 case BNOT:
|
|
1216 getsym();
|
|
1217 e=rvalue(expr13());
|
|
1218 if(!integral(type)) error(TYERR);
|
|
1219 return(car(e)==CONST?list2(CONST,~cadr(e)):list2(BNOT,e));
|
|
1220 case LNOT:
|
|
1221 getsym();
|
|
1222 return(list2(LNOT,rvalue(expr13())));
|
|
1223 case SIZEOF:
|
|
1224 if(getsym()==LPAR)
|
|
1225 if(typeid(getsym()))
|
|
1226 { e=list2(CONST,size(typename()));
|
|
1227 type=INT;
|
|
1228 checksym(RPAR);
|
|
1229 return e;
|
|
1230 }
|
|
1231 else
|
|
1232 { e=expr0();
|
|
1233 checksym(RPAR);
|
|
1234 expr16(e);
|
|
1235 if(sym==INC||sym==DEC)
|
|
1236 { getsym();
|
|
1237 if(type==CHAR) type=INT;
|
|
1238 else if(!scalar(type))
|
|
1239 error(TYERR);
|
|
1240 }
|
|
1241 }
|
|
1242 else expr13();
|
|
1243 e=list2(CONST,size(type));
|
|
1244 type=INT;
|
|
1245 return e;
|
|
1246 }
|
|
1247 e=expr14();
|
|
1248 if((op=sym)==INC||op==DEC)
|
|
1249 { lcheck(e);
|
|
1250 getsym();
|
|
1251 if(type==CHAR)
|
|
1252 { type= INT;
|
|
1253 return(list2(op==INC?CPOSTINC:CPOSTDEC,e));
|
|
1254 }
|
|
1255 if(integral(type))
|
|
1256 return(list3(POSTINC,e,op==INC?1:-1));
|
|
1257 if(car(type)!=POINTER) error(TYERR);
|
|
1258 return (list3(POSTINC,e,
|
|
1259 op == INC ? size(cadr(type)): -size(cadr(type)) ));
|
|
1260 }
|
|
1261 return e;
|
|
1262 }
|
|
1263 expr14()
|
|
1264 {int e1,t;
|
|
1265 switch(sym)
|
|
1266 {case IDENT:
|
|
1267 switch(nptr->sc)
|
|
1268 {case GVAR:
|
|
1269 e1=list2(GVAR,nptr->dsp);
|
|
1270 type=nptr->ty;
|
|
1271 getsym();
|
|
1272 break;
|
|
1273 case LVAR:
|
|
1274 e1=list2(LVAR,nptr->dsp);
|
|
1275 type=nptr->ty;
|
|
1276 getsym();
|
|
1277 break;
|
|
1278 case FUNCTION:
|
|
1279 e1=list2(FNAME,(int)nptr);
|
|
1280 type=list2(FUNCTION,nptr->ty);
|
|
1281 getsym();
|
|
1282 break;
|
|
1283 case EMPTY:
|
|
1284 if(getsym()==LPAR)
|
|
1285 { nptr->sc = FUNCTION;
|
|
1286 nptr->ty= INT;
|
|
1287 type= list2(FUNCTION,INT);
|
|
1288 e1=expr15(list2(FNAME,(int)nptr));
|
|
1289 break;
|
|
1290 }
|
|
1291 default:error(UDERR);
|
|
1292 }
|
|
1293 break;
|
|
1294 case STRING:
|
|
1295 e1=list3(STRING,(int)sptr,symval);
|
|
1296 type=list3(ARRAY,CHAR,symval);
|
|
1297 getsym();
|
|
1298 break;
|
|
1299 case CONST:
|
|
1300 type= INT;
|
|
1301 e1=list2(CONST,symval);
|
|
1302 getsym();
|
|
1303 break;
|
|
1304 case LPAR:
|
|
1305 if(typeid(getsym()))
|
|
1306 { t=typename();
|
|
1307 checksym(RPAR);
|
|
1308 e1=expr13();
|
|
1309 type=t;
|
|
1310 return e1;
|
|
1311 }
|
|
1312 e1=expr0();
|
|
1313 checksym(RPAR);
|
|
1314 break;
|
|
1315 default:error(EXERR);
|
|
1316 }
|
|
1317 return expr16(e1);
|
|
1318 }
|
|
1319 expr16(e1)
|
|
1320 int e1;
|
|
1321 {int e2,t;
|
|
1322 while(1)
|
|
1323 if(sym==LBRA)
|
|
1324 { e1=rvalue(e1);
|
|
1325 t=type;
|
|
1326 getsym();
|
|
1327 e2=rvalue(expr0());
|
|
1328 checksym(RBRA);
|
|
1329 e1=binop(ADD,e1,e2,t,type);
|
|
1330 e1=indop(e1);
|
|
1331 }
|
|
1332 else if(sym==LPAR) e1=expr15(e1);
|
|
1333 else if(sym==PERIOD) e1=strop(e1);
|
|
1334 else if(sym==ARROW) e1=strop(indop(rvalue(e1)));
|
|
1335 else break;
|
|
1336 if(car(e1)==FNAME) type=list2(POINTER,type);
|
|
1337 return e1;
|
|
1338 }
|
|
1339 rvalue(e)
|
|
1340 int e;
|
|
1341 { if(type==CHAR)
|
|
1342 { type= INT;
|
|
1343 switch(car(e))
|
|
1344 {case GVAR:
|
|
1345 return(list2(CRGVAR,cadr(e)));
|
|
1346 case LVAR:
|
|
1347 return(list2(CRLVAR,cadr(e)));
|
|
1348 case INDIRECT:
|
|
1349 return(list2(CRINDIRECT,cadr(e)));
|
|
1350 default:return(e);
|
|
1351 }
|
|
1352 }
|
|
1353 if(!integral(type))
|
|
1354 if(car(type)==ARRAY)
|
|
1355 { type=list2(POINTER,cadr(type));
|
|
1356 if(car(e)==INDIRECT) return cadr(e);
|
|
1357 return list2(ADDRESS,e);
|
|
1358 }
|
|
1359 else if(car(type)!=POINTER) error(TYERR);
|
|
1360 switch(car(e))
|
|
1361 {case GVAR:
|
|
1362 return(list2(RGVAR,cadr(e)));
|
|
1363 case LVAR:
|
|
1364 return(list2(RLVAR,cadr(e)));
|
|
1365 case INDIRECT:
|
|
1366 return(list2(RINDIRECT,cadr(e)));
|
|
1367 default:return(e);
|
|
1368 }
|
|
1369 }
|
|
1370 lcheck(e)
|
|
1371 int e;
|
|
1372 { if(!scalar(type)||car(e)!=GVAR&&car(e)!=LVAR&&car(e)!=INDIRECT)
|
|
1373 error(LVERR);
|
|
1374 }
|
|
1375 indop(e)
|
|
1376 int e;
|
|
1377 { if(type!=INT&&type!=UNSIGNED)
|
|
1378 if(car(type)==POINTER) type=cadr(type);
|
|
1379 else error(TYERR);
|
|
1380 else type= CHAR;
|
|
1381 if(car(e)==ADDRESS) return(cadr(e));
|
|
1382 return(list2(INDIRECT,e));
|
|
1383 }
|
|
1384 strop(e)
|
|
1385 { getsym();
|
|
1386 if (sym!=IDENT||nptr->sc!=FIELD) error(TYERR);
|
|
1387 if (integral(type)||car(type)!=STRUCT && car(type)!=UNION)
|
|
1388 e=rvalue(e);
|
|
1389 type = nptr->ty;
|
|
1390 switch(car(e))
|
|
1391 {case GVAR:
|
|
1392 case LVAR:
|
|
1393 e=list2(car(e),cadr(e) + nptr->dsp);
|
|
1394 break;
|
|
1395 case INDIRECT:
|
|
1396 if(!nptr->dsp) break;
|
|
1397 e=list2(INDIRECT,list3(ADD,cadr(e),list2(CONST,nptr->dsp)));
|
|
1398 break;
|
|
1399 default:
|
|
1400 e=list2(INDIRECT,list3(ADD,e,list2(CONST,nptr->dsp)));
|
|
1401 }
|
|
1402 getsym();
|
|
1403 return e;
|
|
1404 }
|
|
1405 binop(op,e1,e2,t1,t2)
|
|
1406 int op,e1,e2,t1,t2;
|
|
1407 {int e;
|
|
1408 if(car(e1)==CONST&&car(e2)==CONST)
|
|
1409 { e1=cadr(e1);
|
|
1410 e2=cadr(e2);
|
|
1411 type= INT;
|
|
1412 switch(op)
|
|
1413 {case BOR:
|
|
1414 e=e1|e2;break;
|
|
1415 case EOR:
|
|
1416 e=e1^e2;break;
|
|
1417 case BAND:
|
|
1418 e=e1&e2;break;
|
|
1419 case ADD:
|
|
1420 if(integral(t1))
|
|
1421 { if(integral(t2))
|
|
1422 e=e1+e2;
|
|
1423 else
|
|
1424 { if(car(t2)!=POINTER) error(TYERR);
|
|
1425 e=size(cadr(t2))*e1+e2;
|
|
1426 type=t2;
|
|
1427 }
|
|
1428 }
|
|
1429 else
|
|
1430 { if(car(t1)!=POINTER) error(TYERR);
|
|
1431 e=e1+size(cadr(t1))*e2;
|
|
1432 type=t1;
|
|
1433 }
|
|
1434 break;
|
|
1435 case SUB:
|
|
1436 if(integral(t1))
|
|
1437 e=e1-e2;
|
|
1438 else
|
|
1439 { if(car(t1)!=POINTER) error(TYERR);
|
|
1440 e=e1-size(cadr(t1))*e2;
|
|
1441 type=t1;
|
|
1442 }
|
|
1443 break;
|
|
1444 case MUL:
|
|
1445 e=e1*e2;break;
|
|
1446 case DIV:
|
|
1447 if(!e2) error(EXERR);e=e1/e2;break;
|
|
1448 case MOD:
|
|
1449 if(!e2) error(EXERR);e=e1%e2;break;
|
|
1450 case RSHIFT:
|
|
1451 e=e1>>e2;break;
|
|
1452 case LSHIFT:
|
|
1453 e=e1<<e2;
|
|
1454 }
|
|
1455 return list2(CONST,e);
|
|
1456 }
|
|
1457 if((op==ADD||op==MUL||op==BOR||op==EOR||op==BAND)&&
|
|
1458 (car(e1)==CONST||car(e2)!=CONST&&
|
|
1459 (car(e1)==RGVAR||car(e1)==RLVAR)))
|
|
1460 {e=e1;e1=e2;e2=e;e=t1;t1=t2;t2=e;}
|
|
1461 if(op==ADD)
|
|
1462 { if(integral(t1))
|
|
1463 { if(integral(t2))
|
|
1464 { if(t1==INT) type=t2;else type=t1;
|
|
1465 return(list3(ADD,e1,e2));
|
|
1466 }
|
|
1467 if(car(t2)!=POINTER) error(TYERR);
|
|
1468 e=binop(MUL,e1,list2(CONST,size(cadr(t2))),t1,INT);
|
|
1469 type=t2;
|
|
1470 return(list3(ADD,e,e2));
|
|
1471 }
|
|
1472 if(car(t1)!=POINTER||!integral(t2)) error(TYERR);
|
|
1473 e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
1474 type=t1;
|
|
1475 if(car(e1)==ADDRESS&&car(e)==CONST)
|
|
1476 return(list2(ADDRESS,list2(car(cadr(e1)),
|
|
1477 cadr(cadr(e1))+cadr(e))));
|
|
1478 return(list3(ADD,e1,e));
|
|
1479 }
|
|
1480 if(op==SUB)
|
|
1481 { if(integral(t1))
|
|
1482 { if(!integral(t2)) error(TYERR);
|
|
1483 if(t1==INT) type=t2;else type=t1;
|
|
1484 return(list3(SUB,e1,e2));
|
|
1485 }
|
|
1486 if(car(t1)!=POINTER) error(TYERR);
|
|
1487 if(integral(t2))
|
|
1488 { e=binop(MUL,e2,list2(CONST,size(cadr(t1))),t2,INT);
|
|
1489 type=t1;
|
|
1490 return(list3(SUB,e1,e));
|
|
1491 }
|
|
1492 if(car(t2)!=POINTER)
|
|
1493 error(TYERR);
|
|
1494 compatible(t1,t2);
|
|
1495 e=list3(SUB,e1,e2);
|
|
1496 e=binop(DIV,e,list2(CONST,size(cadr(t1))),UNSIGNED,INT);
|
|
1497 type= INT;
|
|
1498 return e;
|
|
1499 }
|
|
1500 if(!integral(t1)||!integral(t2)) error(TYERR);
|
|
1501 if(t1==INT) type=t2;else type=t1;
|
|
1502 if((op==MUL||op==DIV)&&car(e2)==CONST&&cadr(e2)==1) return e1;
|
|
1503 if(op==BOR||op==EOR||op==BAND) return(list3(op,e1,e2));
|
|
1504 return(list3(type==UNSIGNED?op+US:op,e1,e2));
|
|
1505 }
|
|
1506 expr15(e1)
|
|
1507 int e1;
|
|
1508 {int t,args;
|
|
1509 t=type;
|
|
1510 if(integral(t)||car(t)!=FUNCTION)
|
|
1511 error(TYERR);
|
|
1512 t=cadr(t);
|
|
1513 getsym();
|
|
1514 args=0;
|
|
1515 while(sym!=RPAR)
|
|
1516 { args=list2(rvalue(expr1()),args);
|
|
1517 if(sym!=COMMA) break;
|
|
1518 getsym();
|
|
1519 }
|
|
1520 checksym(RPAR);
|
|
1521 if(t==CHAR) type= INT;else type=t;
|
|
1522 return list3(FUNCTION,e1,args);
|
|
1523 }
|
|
1524 typeid(s)
|
|
1525 int s;
|
|
1526 { return (integral(s) || s==SHORT || s==LONG || s==STRUCT || s==UNION ||
|
|
1527 (s==IDENT && nptr->sc==TYPE));
|
|
1528 }
|
|
1529 typename()
|
|
1530 {int t;
|
|
1531 type=t=typespec();
|
|
1532 ndecl0();
|
|
1533 reverse(t);
|
|
1534 return type;
|
|
1535 }
|
|
1536 ndecl0()
|
|
1537 { if(sym==MUL)
|
|
1538 { getsym();
|
|
1539 return type=list2(POINTER,ndecl0());
|
|
1540 }
|
|
1541 return ndecl1();
|
|
1542 }
|
|
1543 ndecl1()
|
|
1544 {int i,t;
|
|
1545 if(sym==LPAR)
|
|
1546 if(getsym()==RPAR) {type=list2(FUNCTION,type); getsym();}
|
|
1547 else
|
|
1548 { ndecl0();
|
|
1549 checksym(RPAR);
|
|
1550 }
|
|
1551 while(1)
|
|
1552 if(sym==LBRA)
|
|
1553 { getsym();
|
|
1554 t=type;
|
|
1555 i=cexpr(expr());
|
|
1556 checksym(RBRA);
|
|
1557 type=list3(ARRAY,t,i);
|
|
1558 }
|
|
1559 else if(sym==LPAR)
|
|
1560 { getsym();
|
|
1561 checksym(RPAR);
|
|
1562 type=list2(FUNCTION,type);
|
|
1563 }
|
|
1564 else return type;
|
|
1565 }
|
|
1566
|
|
1567 bexpr(e1,cond,l1)
|
|
1568 int e1,l1;
|
|
1569 char cond;
|
|
1570 {int e2,l2;
|
|
1571 if (chk) return;
|
|
1572 e2=cadr(e1);
|
|
1573 switch(car(e1))
|
|
1574 {case LNOT:
|
|
1575 bexpr(e2,!cond,l1);
|
|
1576 return;
|
|
1577 case GT:
|
|
1578 rexpr(e1,l1,cond?"GT":"LE");
|
|
1579 return;
|
|
1580 case UGT:
|
|
1581 rexpr(e1,l1,cond?"HI":"LS");
|
|
1582 return;
|
|
1583 case GE:
|
|
1584 rexpr(e1,l1,cond?"GE":"LT");
|
|
1585 return;
|
|
1586 case UGE:
|
|
1587 rexpr(e1,l1,cond?"HS":"LO");
|
|
1588 return;
|
|
1589 case LT:
|
|
1590 rexpr(e1,l1,cond?"LT":"GE");
|
|
1591 return;
|
|
1592 case ULT:
|
|
1593 rexpr(e1,l1,cond?"LO":"HS");
|
|
1594 return;
|
|
1595 case LE:
|
|
1596 rexpr(e1,l1,cond?"LE":"GT");
|
|
1597 return;
|
|
1598 case ULE:
|
|
1599 rexpr(e1,l1,cond?"LS":"HI");
|
|
1600 return;
|
|
1601 case EQ:
|
|
1602 rexpr(e1,l1,cond?"EQ":"NE");
|
|
1603 return;
|
|
1604 case NEQ:
|
|
1605 rexpr(e1,l1,cond?"NE":"EQ");
|
|
1606 return;
|
|
1607 case LAND:
|
|
1608 bexpr(e2,0,cond?(l2=fwdlabel()):l1);
|
|
1609 bexpr(caddr(e1),cond,l1);
|
|
1610 if(cond) fwddef(l2);
|
|
1611 return;
|
|
1612 case LOR:
|
|
1613 bexpr(e2,1,cond?l1:(l2=fwdlabel()));
|
|
1614 bexpr(caddr(e1),cond,l1);
|
|
1615 if(!cond) fwddef(l2);
|
|
1616 return;
|
|
1617 case CRGVAR:
|
|
1618 ldby(e2);
|
|
1619 jcond(l1,cond);
|
|
1620 return;
|
|
1621 case CRLVAR:
|
|
1622 ldbu(e2);
|
|
1623 jcond(l1,cond);
|
|
1624 return;
|
|
1625 case CONST:
|
|
1626 if(cond&&e2||!cond&&!e2) jmp(l1);
|
|
1627 return;
|
|
1628 case RGVAR:
|
|
1629 case RLVAR:
|
|
1630 case CRINDIRECT:
|
|
1631 gexpr(e1);
|
|
1632 jcond(l1,cond);
|
|
1633 return;
|
|
1634 default:gexpr(e1);
|
|
1635 subdim(0);
|
|
1636 jcond(l1,cond);
|
|
1637 return;
|
|
1638 }
|
|
1639 }
|
|
1640 rexpr(e1,l1,s)
|
|
1641 int e1,l1;
|
|
1642 char *s;
|
|
1643 { gexpr(list3(SUB,cadr(e1),caddr(e1)));
|
|
1644 printf("\tLB%s\t_%d\n",s,l1);
|
|
1645 }
|
|
1646 jcond(l,cond)
|
|
1647 int l;
|
|
1648 char cond;
|
|
1649 { printf("\tLB%s\t_%d\n",cond?"NE":"EQ",l);
|
|
1650 }
|
|
1651 jmp(l)
|
|
1652 int l;
|
|
1653 { control=0;
|
|
1654 printf("\tLBRA\t_%d\n",l);
|
|
1655 }
|
|
1656 fwdlabel()
|
|
1657 { return labelno++;
|
|
1658 }
|
|
1659 fwddef(l)
|
|
1660 int l;
|
|
1661 { control=1;
|
|
1662 printf("_%d\n",l);
|
|
1663 }
|
|
1664 backdef()
|
|
1665 { control=1;
|
|
1666 printf("_%d\n",labelno);
|
|
1667 return labelno++;
|
|
1668 }
|
|
1669
|
|
1670 gexpr(e1)
|
|
1671 int e1;
|
|
1672 {int e2,e3;
|
|
1673 if (chk) return;
|
|
1674 e2 = cadr(e1);
|
|
1675 switch (car(e1))
|
|
1676 {case GVAR:
|
|
1677 leaxy(e2);
|
|
1678 return;
|
|
1679 case RGVAR:
|
|
1680 lddy(e2);
|
|
1681 return;
|
|
1682 case CRGVAR:
|
|
1683 ldby(e2);
|
|
1684 sex();
|
|
1685 return;
|
|
1686 case LVAR:
|
|
1687 leaxu(e2);
|
|
1688 return;
|
|
1689 case RLVAR:
|
|
1690 lddu(e2);
|
|
1691 return;
|
|
1692 case CRLVAR:
|
|
1693 ldbu(e2);
|
|
1694 sex();
|
|
1695 return;
|
|
1696 case FNAME:
|
|
1697 leaxpcr((NMTBL *)e2);
|
|
1698 tfrxd();
|
|
1699 return;
|
|
1700 case CONST:
|
|
1701 if (e2) lddim(e2);
|
|
1702 else clrd();
|
|
1703 return;
|
|
1704 case STRING:
|
|
1705 string(e1);
|
|
1706 return;
|
|
1707 case FUNCTION:
|
|
1708 function(e1);
|
|
1709 return;
|
|
1710 case INDIRECT:
|
|
1711 indirect(e1);
|
|
1712 return;
|
|
1713 case RINDIRECT: case CRINDIRECT:
|
|
1714 rindirect(e1);
|
|
1715 return;
|
|
1716 case ADDRESS:
|
|
1717 gexpr(e2);
|
|
1718 tfrxd();
|
|
1719 return;
|
|
1720 case MINUS:
|
|
1721 gexpr(e2);
|
|
1722 printf("\tNEGA\n\tNEGB\n\tSBCA\t#0\n");
|
|
1723 return;
|
|
1724 case BNOT:
|
|
1725 gexpr(e2);
|
|
1726 printf("\tCOMA\n\tCOMB\n");
|
|
1727 return;
|
|
1728 case PREINC:
|
|
1729 switch (car(e2))
|
|
1730 {case GVAR: case LVAR:
|
|
1731 ldd(e2);
|
|
1732 adddim(caddr(e1));
|
|
1733 std(e2);
|
|
1734 return;
|
|
1735 default:
|
|
1736 gexpr(e2);
|
|
1737 lddx();
|
|
1738 adddim(caddr(e1));
|
|
1739 stdx();
|
|
1740 return;
|
|
1741 }
|
|
1742 case POSTINC:
|
|
1743 switch (car(e2))
|
|
1744 {case GVAR: case LVAR:
|
|
1745 ldd(e2);
|
|
1746 adddim(e3 = caddr(e1));
|
|
1747 std(e2);
|
|
1748 subdim(e3);
|
|
1749 return;
|
|
1750 default:
|
|
1751 gexpr(e2);
|
|
1752 lddx();
|
|
1753 adddim(e3=caddr(e1));
|
|
1754 stdx();
|
|
1755 subdim(e3);
|
|
1756 return;
|
|
1757 }
|
|
1758 case CPOSTINC:
|
|
1759 gexpr(e2);
|
|
1760 ldbx();
|
|
1761 incx();
|
|
1762 sex();
|
|
1763 return;
|
|
1764 case CPREINC:
|
|
1765 gexpr(e2);
|
|
1766 incx();
|
|
1767 ldbx();
|
|
1768 sex();
|
|
1769 return;
|
|
1770 case CPOSTDEC:
|
|
1771 gexpr(e2);
|
|
1772 ldbx();
|
|
1773 decx();
|
|
1774 sex();
|
|
1775 return;
|
|
1776 case CPREDEC:
|
|
1777 gexpr(e2);
|
|
1778 decx();
|
|
1779 ldbx();
|
|
1780 sex();
|
|
1781 return;
|
|
1782 case MUL: case UMUL:
|
|
1783 if (car(e3=caddr(e1)) == CONST)
|
|
1784 { if (0 < (e3 = cadr(e3)) && e3 <= 10)
|
|
1785 { gexpr(e2);
|
|
1786 switch (e3)
|
|
1787 {case 8:
|
|
1788 asld();
|
|
1789 case 4:
|
|
1790 asld();
|
|
1791 case 2:
|
|
1792 asld();
|
|
1793 case 1:
|
|
1794 return;
|
|
1795 case 10:
|
|
1796 asld();
|
|
1797 case 5:
|
|
1798 pushd();
|
|
1799 asld();
|
|
1800 asld();
|
|
1801 addds();
|
|
1802 return;
|
|
1803 case 6:
|
|
1804 asld();
|
|
1805 case 3:
|
|
1806 pushd();
|
|
1807 asld();
|
|
1808 addds();
|
|
1809 return;
|
|
1810 case 9: case 7:
|
|
1811 pushd();
|
|
1812 asld();
|
|
1813 asld();
|
|
1814 asld();
|
|
1815 if (e3 == 9) addds(); else subds();
|
|
1816 return;
|
|
1817 }
|
|
1818 }
|
|
1819 }
|
|
1820 case DIV: case UDIV: case MOD: case UMOD:
|
|
1821 case LSHIFT: case ULSHIFT: case RSHIFT: case URSHIFT:
|
|
1822 binexpr(e1);
|
|
1823 return;
|
|
1824 case ADD: case SUB: case BAND: case EOR: case BOR:
|
|
1825 machinop(e1);
|
|
1826 return;
|
|
1827 case COND:
|
|
1828 e2=fwdlabel();
|
|
1829 bexpr(cadr(e1),0,e2);
|
|
1830 gexpr(caddr(e1));
|
|
1831 jmp(e3=fwdlabel());
|
|
1832 fwddef(e2);
|
|
1833 gexpr(cadddr(e1));
|
|
1834 fwddef(e3);
|
|
1835 return;
|
|
1836 case ASS: case CASS:
|
|
1837 assign(e1);
|
|
1838 return;
|
|
1839 case ASSOP: case CASSOP:
|
|
1840 assop(e1);
|
|
1841 return;
|
|
1842 case COMMA:
|
|
1843 gexpr(e2);
|
|
1844 gexpr(caddr(e1));
|
|
1845 return;
|
|
1846 default:
|
|
1847 bexpr(e1,1,e2=fwdlabel());
|
|
1848 clrd();
|
|
1849 printf("\tBRA\t*+5\n");
|
|
1850 fwddef(e2);
|
|
1851 lddim(1);
|
|
1852 }
|
|
1853 }
|
|
1854 string(e1)
|
|
1855 int e1;
|
|
1856 {char *s;
|
|
1857 int i,l,lb;
|
|
1858 s=(char *)cadr(e1);
|
|
1859 lb=fwdlabel();
|
|
1860 if ((l = caddr(e1)) < 128)
|
105
|
1861 printf("\tLEAX\t*+5,PCR\n\tBRA\t_%d\n",lb);
|
99
|
1862 else
|
105
|
1863 printf("\tLEAX\t*+6,PCR\n\tLBRA\t_%d\n",lb);
|
99
|
1864 do
|
|
1865 { printf("\tFCB\t%d",*s++);
|
|
1866 for (i=8; --l && --i;) printf(",%d",*s++);
|
|
1867 printf("\n");
|
|
1868 }
|
|
1869 while (l);
|
|
1870 fwddef(lb);
|
|
1871 }
|
|
1872 function(e1)
|
|
1873 int e1;
|
|
1874 {int e2,e3,e4,e5,nargs;
|
|
1875 NMTBL *n;
|
|
1876 e2 = cadr(e1);
|
|
1877 nargs = 0;
|
|
1878 for (e3 = caddr(e1); e3; e3 = cadr(e3))
|
|
1879 { n=(NMTBL *)(e5=(cadr(e4 = car(e3))));
|
|
1880 switch(car(e4))
|
|
1881 {case FNAME:
|
|
1882 leaxpcr(n);
|
|
1883 pushx();
|
|
1884 break;
|
|
1885 case ADDRESS:
|
|
1886 gexpr(e5);
|
|
1887 pushx();
|
|
1888 break;
|
|
1889 default:gexpr(e4);
|
|
1890 pushd();
|
|
1891 }
|
|
1892 ++nargs;
|
|
1893 }
|
|
1894 if (car(e2) == FNAME)
|
|
1895 { n=(NMTBL *)cadr(e2);
|
|
1896 printf("\tLBSR\t%s\n",n->nm);
|
|
1897 }
|
|
1898 else
|
|
1899 { gexpr(e2);
|
|
1900 printf("\tJSR\t,X\n");
|
|
1901 }
|
|
1902 if (nargs) printf("\tLEAS\t%d,S\n",2*nargs);
|
|
1903 }
|
|
1904 indirect(e1)
|
|
1905 int e1;
|
|
1906 {int e2,e3,e4;
|
|
1907 e3 = cadr(e2 = cadr(e1));
|
|
1908 switch(car(e2))
|
|
1909 {case RGVAR: case RLVAR:
|
|
1910 ldx(e2);
|
|
1911 return;
|
|
1912 case ADD:
|
|
1913 if(car(e3)==ADDRESS)
|
|
1914 { gexpr(caddr(e2));
|
|
1915 gexpr(cadr(e3));
|
|
1916 opdx("LEAX");
|
|
1917 return;
|
|
1918 }
|
|
1919 switch(car(e4 = caddr(e2)))
|
|
1920 {case RGVAR: case RLVAR:
|
|
1921 gexpr(e3);
|
|
1922 ldx(e4);
|
|
1923 opdx("LEAX");
|
|
1924 return;
|
|
1925 }
|
|
1926 default:
|
|
1927 gexpr(e2);
|
|
1928 tfrdx();
|
|
1929 }
|
|
1930 }
|
|
1931
|
|
1932 machinop(e1)
|
|
1933 int e1;
|
|
1934 {int e2,e3;
|
|
1935 e2 = cadr(e1);
|
|
1936 switch (car(e3 = caddr(e1)))
|
|
1937 {case RGVAR: case RLVAR: case CONST:
|
|
1938 gexpr(e2);
|
|
1939 oprt(car(e1),e3);
|
|
1940 return;
|
|
1941 default:
|
|
1942 gexpr(e3);
|
|
1943 pushd();
|
|
1944 gexpr(e2);
|
|
1945 tosop(car(e1));
|
|
1946 return;
|
|
1947 }
|
|
1948 }
|
|
1949
|
|
1950 rindirect(e1)
|
|
1951 int e1;
|
|
1952 {char *op;
|
|
1953 int e2,e3,e4,byte,l;
|
|
1954 op = ((byte = (car(e1) == CRINDIRECT)) ? "LDB" : "LDD");
|
|
1955 e3 = cadr(e2 = cadr(e1));
|
|
1956 switch (car(e2))
|
|
1957 {case RGVAR: case RLVAR:
|
|
1958 indir(op,e2);
|
|
1959 sextend(byte);
|
|
1960 return;
|
|
1961 case ADD:
|
|
1962 if(car(e3)==ADDRESS)
|
|
1963 { gexpr(caddr(e2));
|
|
1964 gexpr(cadr(e3));
|
|
1965 opdx(op);
|
|
1966 sextend(byte);
|
|
1967 return;
|
|
1968 }
|
|
1969 switch(car(e4=caddr(e2)))
|
|
1970 {case RGVAR: case RLVAR:
|
|
1971 gexpr(e3);
|
|
1972 ldx(e4);
|
|
1973 opdx(op);
|
|
1974 sextend(byte);
|
|
1975 return;
|
|
1976 case CONST:
|
|
1977 switch (car(e3))
|
|
1978 {case RGVAR: case RLVAR:
|
|
1979 ldx(e3);
|
|
1980 indexx(op,cadr(e4));
|
|
1981 sextend(byte);
|
|
1982 return;
|
|
1983 }
|
|
1984 default:
|
|
1985 gexpr(e3);
|
|
1986 pushd();
|
|
1987 gexpr(e4);
|
|
1988 pulx();
|
|
1989 opdx(op);
|
|
1990 sextend(byte);
|
|
1991 return;
|
|
1992 }
|
|
1993 case PREINC:
|
|
1994 if ((l = caddr(e2)) == -1 || l == -2)
|
|
1995 switch (car(e3))
|
|
1996 {case GVAR: case LVAR:
|
|
1997 ldx(e3);
|
|
1998 predecx(op,l);
|
|
1999 stx(e3);
|
|
2000 sextend(byte);
|
|
2001 return;
|
|
2002 }
|
|
2003 break;
|
|
2004 case POSTINC:
|
|
2005 if ((l = caddr(e2)) == 1 || l == 2)
|
|
2006 switch (car(e3))
|
|
2007 {case GVAR: case LVAR:
|
|
2008 ldx(e3);
|
|
2009 postincx(op,l);
|
|
2010 stx(e3);
|
|
2011 sextend(byte);
|
|
2012 return;
|
|
2013 }
|
|
2014 break;
|
|
2015 }
|
|
2016 gexpr(e2);
|
|
2017 tfrdx();
|
|
2018 indexx(op,0);
|
|
2019 sextend(byte);
|
|
2020 }
|
|
2021 assign(e1)
|
|
2022 int e1;
|
|
2023 {char *op;
|
|
2024 int e2,e3,e4,e5,l;
|
|
2025 op = (car(e1) == CASS ? "STB" : "STD");
|
|
2026 e3 = cadr(e2 = cadr(e1));
|
|
2027 e4 = caddr(e1);
|
|
2028 switch(car(e2))
|
|
2029 {case GVAR: case LVAR:
|
|
2030 gexpr(e4);
|
|
2031 index(op,e2);
|
|
2032 return;
|
|
2033 case INDIRECT:
|
|
2034 switch(car(e3))
|
|
2035 {case RGVAR: case RLVAR:
|
|
2036 gexpr(e4);
|
|
2037 indir(op,e3);
|
|
2038 return;
|
|
2039 case ADD:
|
|
2040 if (car(caddr(e3)) == CONST)
|
|
2041 switch (car(e5=cadr(e3)))
|
|
2042 {case RGVAR: case RLVAR:
|
|
2043 gexpr(e4);
|
|
2044 ldx(e5);
|
|
2045 indexx(op,cadr(caddr(e3)));
|
|
2046 return;
|
|
2047 }
|
|
2048 break;
|
|
2049 case PREINC:
|
|
2050 if ((l = caddr(e3)) == -1 || l == -2)
|
|
2051 switch (car(e5=cadr(e3)))
|
|
2052 {case GVAR: case LVAR:
|
|
2053 gexpr(e4);
|
|
2054 ldx(e5);
|
|
2055 predecx(op,l);
|
|
2056 stx(e5);
|
|
2057 return;
|
|
2058 }
|
|
2059 break;
|
|
2060 case POSTINC:
|
|
2061 if ((l = caddr(e3)) == 1 || l == 2)
|
|
2062 switch (car(e5=cadr(e3)))
|
|
2063 {case GVAR: case LVAR:
|
|
2064 gexpr(e4);
|
|
2065 ldx(e5);
|
|
2066 postincx(op,l);
|
|
2067 stx(e5);
|
|
2068 return;
|
|
2069 }
|
|
2070 break;
|
|
2071 }
|
|
2072 }
|
|
2073 switch (car(e4))
|
|
2074 {case RGVAR: case CRGVAR: case RLVAR: case CRLVAR: case CONST:
|
|
2075 gexpr(e2);
|
|
2076 gexpr(e4);
|
|
2077 break;
|
|
2078 default:
|
|
2079 gexpr(e4);
|
|
2080 pushd();
|
|
2081 gexpr(e2);
|
|
2082 pulld();
|
|
2083 }
|
|
2084 indexx(op,0);
|
|
2085 return;
|
|
2086 }
|
|
2087 assop(e1)
|
|
2088 int e1;
|
|
2089 {int e2,e3,byte,op;
|
|
2090 char *ldop,*stop;
|
|
2091 ldop = ((byte = (car(e1) == CASSOP)) ? "LDB" : "LDD");
|
|
2092 stop = (byte ? "STB" : "STD");
|
|
2093 e2 = cadr(e1);
|
|
2094 e3 = caddr(e1);
|
|
2095 op = cadddr(e1);
|
|
2096 switch (car(e2))
|
|
2097 {case GVAR: case LVAR:
|
|
2098 switch (car(e3))
|
|
2099 {case RGVAR: case RLVAR: case CONST:
|
|
2100 if (simpop(op))
|
|
2101 { index(ldop,e2);
|
|
2102 sextend(byte);
|
|
2103 oprt(op,e3);
|
|
2104 index(stop,e2);
|
|
2105 return;
|
|
2106 }
|
|
2107 default:
|
|
2108 gexpr(e3);
|
|
2109 pushd();
|
|
2110 index(ldop,e2);
|
|
2111 sextend(byte);
|
|
2112 tosop(op);
|
|
2113 index(stop,e2);
|
|
2114 return;
|
|
2115 }
|
|
2116 default:
|
|
2117 switch (car(e3))
|
|
2118 {case RGVAR: case RLVAR: case CONST:
|
|
2119 if (simpop(op))
|
|
2120 { gexpr(e2);
|
|
2121 indexx(ldop,0);
|
|
2122 sextend(byte);
|
|
2123 oprt(op,e3);
|
|
2124 indexx(stop,0);
|
|
2125 return;
|
|
2126 }
|
|
2127 default:
|
|
2128 gexpr(e3);
|
|
2129 pushd();
|
|
2130 gexpr(e2);
|
|
2131 indexx(ldop,0);
|
|
2132 sextend(byte);
|
|
2133 tosop(op);
|
|
2134 indexx(stop,0);
|
|
2135 return;
|
|
2136 }
|
|
2137 }
|
|
2138 }
|
|
2139 simpop(op)
|
|
2140 int op;
|
|
2141 { return (op == ADD || op == SUB ||
|
|
2142 op == BAND || op == EOR || op == BOR);
|
|
2143 }
|
|
2144 oprt(op,e1)
|
|
2145 int op,e1;
|
|
2146 {int e2;
|
|
2147 e2 = cadr(e1);
|
|
2148 switch (car(e1))
|
|
2149 {case RGVAR:
|
|
2150 oprt1(op,"Y",e2);
|
|
2151 return;
|
|
2152 case RLVAR:
|
|
2153 oprt1(op,"U",e2);
|
|
2154 return;
|
|
2155 case CONST:
|
|
2156 oprtc(op,e2);
|
|
2157 return;
|
|
2158 }
|
|
2159 }
|
|
2160 oprt1(op,index,n)
|
|
2161 int op,n;
|
|
2162 char *index;
|
|
2163 { switch (op)
|
|
2164 {case ADD:
|
|
2165 printf("\tADDD\t%d,%s\n",n,index);
|
|
2166 return;
|
|
2167 case SUB:
|
|
2168 printf("\tSUBD\t%d,%s\n",n,index);
|
|
2169 return;
|
|
2170 case BAND: case EOR: case BOR:
|
|
2171 dualop(op,index,n);
|
|
2172 return;
|
|
2173 }
|
|
2174 }
|
|
2175 dualop(op,index,n)
|
|
2176 int op;
|
|
2177 char *index;
|
|
2178 int n;
|
|
2179 {char *ops;
|
|
2180 ops = ((op == BAND) ? "AND" :
|
|
2181 (op == EOR) ? "EOR" :
|
|
2182 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2183 printf("\t%sA\t%d,%s\n\t%sB\t%d+1,%s\n",ops,n,index,ops,n,index);
|
|
2184 }
|
|
2185
|
|
2186 oprtc(op,n)
|
|
2187 int op,n;
|
|
2188 { switch (op)
|
|
2189 {case ADD:
|
|
2190 adddim(n);
|
|
2191 return;
|
|
2192 case SUB:
|
|
2193 subdim(n);
|
|
2194 return;
|
|
2195 case BAND: case EOR: case BOR:
|
|
2196 dualc(op,n);
|
|
2197 return;
|
|
2198 }
|
|
2199 }
|
|
2200 dualc(op,n)
|
|
2201 int op;
|
|
2202 int n;
|
|
2203 {char *ops;
|
|
2204 ops = ((op == BAND) ? "AND" :
|
|
2205 (op == EOR) ? "EOR" :
|
|
2206 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2207 printf("\t%sA\t#%d\n\t%sB\t#%d\n",ops,(n >> 8) & 0xff,ops,n & 0xff);
|
|
2208 }
|
|
2209 tosop(op)
|
|
2210 int op;
|
|
2211 { switch (op)
|
|
2212 {case ADD:
|
|
2213 addds();
|
|
2214 return;
|
|
2215 case SUB:
|
|
2216 subds();
|
|
2217 return;
|
|
2218 case BAND: case EOR: case BOR:
|
|
2219 dualtosop(op);
|
|
2220 return;
|
|
2221 default:
|
|
2222 pulx();
|
|
2223 library(op);
|
|
2224 }
|
|
2225 }
|
|
2226 dualtosop(op)
|
|
2227 int op;
|
|
2228 {char *ops;
|
|
2229 ops = ((op == BAND) ? "AND" :
|
|
2230 (op == EOR) ? "EOR" :
|
|
2231 (op == BOR) ? "OR" : (char *)DEBUG);
|
|
2232 printf("\t%sA\t,S+\n\t%sB\t,S+\n",ops,ops);
|
|
2233 }
|
|
2234 pushd()
|
|
2235 { printf("\tPSHS\tD\n");
|
|
2236 }
|
|
2237 pushx()
|
|
2238 { printf("\tPSHS\tX\n");
|
|
2239 }
|
|
2240 pulld()
|
|
2241 { printf("\tPULS\tD\n");
|
|
2242 }
|
|
2243 pulx()
|
|
2244 { printf("\tPULS\tX\n");
|
|
2245 }
|
|
2246 tfrdx()
|
|
2247 { printf("\tTFR\tD,X\n");
|
|
2248 }
|
|
2249 tfrxd()
|
|
2250 { printf("\tTFR\tX,D\n");
|
|
2251 }
|
|
2252 /*
|
|
2253 exgdx()
|
|
2254 { printf("\tEXG\tD,X\n");
|
|
2255 }
|
|
2256 */
|
|
2257 asld()
|
|
2258 { printf("\tASLB\n\tROLA\n");
|
|
2259 }
|
|
2260 adddim(n)
|
|
2261 { printf("\tADDD\t#%d\n",n);
|
|
2262 }
|
|
2263 subdim(n)
|
|
2264 { printf("\tSUBD\t#%d\n",n);
|
|
2265 }
|
|
2266 cmpdimm(n)
|
|
2267 int n;
|
|
2268 { printf("\tCMPD\t#%d\n",n);
|
|
2269 }
|
|
2270 addds()
|
|
2271 { printf("\tADDD\t,S++\n");
|
|
2272 }
|
|
2273 subds()
|
|
2274 { printf("\tSUBD\t,S++\n");
|
|
2275 }
|
|
2276 clrd()
|
|
2277 { printf("\tCLRA\n\tCLRB\n");
|
|
2278 }
|
|
2279 lddim(n)
|
|
2280 int n;
|
|
2281 { printf("\tLDD\t#%d\n",n);
|
|
2282 }
|
|
2283
|
|
2284 ldd(e)
|
|
2285 int e;
|
|
2286 { switch (car(e))
|
|
2287 {case GVAR:
|
|
2288 lddy(cadr(e));
|
|
2289 return;
|
|
2290 case LVAR:
|
|
2291 lddu(cadr(e));
|
|
2292 return;
|
|
2293 default:
|
|
2294 DEBUG;
|
|
2295 }
|
|
2296 }
|
|
2297
|
|
2298 lddx()
|
|
2299 { printf("\tLDD\t,X\n");
|
|
2300 }
|
|
2301 lddy(n)
|
|
2302 int n;
|
|
2303 { printf("\tLDD\t%d,Y\n",n);
|
|
2304 }
|
|
2305 lddu(n)
|
|
2306 int n;
|
|
2307 { printf("\tLDD\t%d,U\n",n);
|
|
2308 }
|
|
2309
|
|
2310 std(e)
|
|
2311 int e;
|
|
2312 { switch (car(e))
|
|
2313 {case GVAR:
|
|
2314 stdy(cadr(e));
|
|
2315 return;
|
|
2316 case LVAR:
|
|
2317 stdu(cadr(e));
|
|
2318 return;
|
|
2319 default:
|
|
2320 DEBUG;
|
|
2321 }
|
|
2322 }
|
|
2323 stdx()
|
|
2324 { printf("\tSTD\t,X\n");
|
|
2325 }
|
|
2326 stdy(n)
|
|
2327 int n;
|
|
2328 { printf("\tSTD\t%d,Y\n",n);
|
|
2329 }
|
|
2330 stdu(n)
|
|
2331 int n;
|
|
2332 { printf("\tSTD\t%d,U\n",n);
|
|
2333 }
|
|
2334
|
|
2335 ldbx()
|
|
2336 { printf("\tLDB\t,X\n");
|
|
2337 }
|
|
2338 /*
|
|
2339 stbx()
|
|
2340 { printf("\tSTB\t,X\n");
|
|
2341 }
|
|
2342 */
|
|
2343 ldby(n)
|
|
2344 int n;
|
|
2345 { printf("\tLDB\t%d,Y\n",n);
|
|
2346 }
|
|
2347 ldbu(n)
|
|
2348 int n;
|
|
2349 { printf("\tLDB\t%d,U\n",n);
|
|
2350 }
|
|
2351 predecx(op,l)
|
|
2352 char *op;
|
|
2353 int l;
|
|
2354 { printf("\t%s\t,%sX\n",op,(l == -1 ? "-" : "--"));
|
|
2355 }
|
|
2356 postincx(op,l)
|
|
2357 char *op;
|
|
2358 int l;
|
|
2359 { printf("\t%s\t,X%s\n",op,(l == 1 ? "+" : "++"));
|
|
2360 }
|
|
2361 leaxy(n)
|
|
2362 int n;
|
|
2363 { printf("\tLEAX\t%d,Y\n",n);
|
|
2364 }
|
|
2365 leaxu(n)
|
|
2366 int n;
|
|
2367 { printf("\tLEAX\t%d,U\n",n);
|
|
2368 }
|
|
2369 leaxpcr(n)
|
|
2370 NMTBL *n;
|
|
2371 { printf("\tLEAX\t%s,PCR\n",n->nm);
|
|
2372 }
|
|
2373
|
|
2374 ldx(e)
|
|
2375 int e;
|
|
2376 { switch (car(e))
|
|
2377 {case GVAR: case RGVAR:
|
|
2378 ldxy(cadr(e));
|
|
2379 return;
|
|
2380 case LVAR: case RLVAR:
|
|
2381 ldxu(cadr(e));
|
|
2382 return;
|
|
2383 default:
|
|
2384 DEBUG;
|
|
2385 }
|
|
2386 }
|
|
2387
|
|
2388 ldxy(n)
|
|
2389 int n;
|
|
2390 { printf("\tLDX\t%d,Y\n",n);
|
|
2391 }
|
|
2392 ldxu(n)
|
|
2393 int n;
|
|
2394 { printf("\tLDX\t%d,U\n",n);
|
|
2395 }
|
|
2396 /*
|
|
2397 ldxi(n)
|
|
2398 int n;
|
|
2399 { printf("\tLDX\t#%d\n",n);
|
|
2400 }
|
|
2401 */
|
|
2402 stx(e)
|
|
2403 int e;
|
|
2404 { switch (car(e))
|
|
2405 {case GVAR:
|
|
2406 stxy(cadr(e));
|
|
2407 return;
|
|
2408 case LVAR:
|
|
2409 stxu(cadr(e));
|
|
2410 return;
|
|
2411 default:
|
|
2412 DEBUG;
|
|
2413 }
|
|
2414 }
|
|
2415
|
|
2416 stxy(n)
|
|
2417 int n;
|
|
2418 { printf("\tSTX\t%d,Y\n",n);
|
|
2419 }
|
|
2420 stxu(n)
|
|
2421 int n;
|
|
2422 { printf("\tSTX\t%d,U\n",n);
|
|
2423 }
|
|
2424
|
|
2425 sex()
|
|
2426 { printf("\tSEX\n");
|
|
2427 }
|
|
2428 incx()
|
|
2429 { printf("\tINC\t,X\n");
|
|
2430 }
|
|
2431 decx()
|
|
2432 { printf("\tDEC\t,X\n");
|
|
2433 }
|
|
2434 opdx(op)
|
|
2435 char *op;
|
|
2436 { printf("\t%s\tD,X\n",op);
|
|
2437 }
|
|
2438 indexx(op,n)
|
|
2439 char *op;
|
|
2440 int n;
|
|
2441 { printf("\t%s\t%d,X\n",op,n);
|
|
2442 }
|
|
2443
|
|
2444 index(op,e)
|
|
2445 char *op;
|
|
2446 int e;
|
|
2447 { switch (car(e))
|
|
2448 {case GVAR:
|
|
2449 indexy(op,cadr(e));
|
|
2450 return;
|
|
2451 case LVAR:
|
|
2452 indexu(op,cadr(e));
|
|
2453 return;
|
|
2454 default:
|
|
2455 DEBUG;
|
|
2456 }
|
|
2457 }
|
|
2458
|
|
2459 indexy(op,n)
|
|
2460 char *op;
|
|
2461 int n;
|
|
2462 { printf("\t%s\t%d,Y\n",op,n);
|
|
2463 }
|
|
2464 indexu(op,n)
|
|
2465 char *op;
|
|
2466 int n;
|
|
2467 { printf("\t%s\t%d,U\n",op,n);
|
|
2468 }
|
|
2469
|
|
2470
|
|
2471 indir(op,e)
|
|
2472 char *op;
|
|
2473 int e;
|
|
2474 { switch (car(e))
|
|
2475 {case RGVAR:
|
|
2476 indiry(op,cadr(e));
|
|
2477 return;
|
|
2478 case RLVAR:
|
|
2479 indiru(op,cadr(e));
|
|
2480 return;
|
|
2481 default:
|
|
2482 DEBUG;
|
|
2483 }
|
|
2484 }
|
|
2485
|
|
2486 indiry(op,n)
|
|
2487 char *op;
|
|
2488 int n;
|
|
2489 { printf("\t%s\t[%d,Y]\n",op,n);
|
|
2490 }
|
|
2491 indiru(op,n)
|
|
2492 char *op;
|
|
2493 int n;
|
|
2494 { printf("\t%s\t[%d,U]\n",op,n);
|
|
2495 }
|
|
2496 sextend(byte)
|
|
2497 int byte;
|
|
2498 { if (byte) sex();
|
|
2499 }
|
|
2500 binexpr(e1)
|
|
2501 int e1;
|
|
2502 { gexpr(caddr(e1));
|
|
2503 pushd();
|
|
2504 gexpr(cadr(e1));
|
|
2505 pulx();
|
|
2506 library(car(e1));
|
|
2507 }
|
|
2508 library(op)
|
|
2509 int op;
|
|
2510 { printf("\tLBSR\t_0000%d\n",
|
|
2511 ((op == MUL || op == UMUL) ? 1 :
|
|
2512 (op == DIV) ? 2 :
|
|
2513 (op == UDIV) ? 3 :
|
|
2514 (op == MOD) ? 4 :
|
|
2515 (op == UMOD) ? 5 :
|
|
2516 (op == LSHIFT) ? 6 :
|
|
2517 (op == ULSHIFT) ? 7 :
|
|
2518 (op == RSHIFT) ? 8 :
|
|
2519 (op == URSHIFT) ? 9 : DEBUG));
|
|
2520 }
|
|
2521 cexpr(e)
|
|
2522 int e;
|
|
2523 { if (car(e) != CONST) error(CNERR);
|
|
2524 return (cadr(e));
|
|
2525 }
|
|
2526
|
|
2527 getsym()
|
|
2528 {NMTBL *nptr0,*nptr1;
|
|
2529 int i;
|
|
2530 char c;
|
|
2531 if (alpha(skipspc()))
|
|
2532 { i = hash = 0;
|
|
2533 while (alpha(ch) || digit(ch))
|
|
2534 { if (i <= 7) hash=7*(hash+(name[i++]=ch));
|
|
2535 getch();
|
|
2536 }
|
|
2537 name[i] = '\0';
|
|
2538 nptr0 = gsearch();
|
|
2539 if (nptr0->sc == RESERVE) return sym = nptr0->dsp;
|
|
2540 if (nptr0->sc == MACRO && !mflag)
|
|
2541 { mflag++;
|
|
2542 chsave = ch;
|
|
2543 chptrsave = chptr;
|
|
2544 chptr = (char *)nptr0->dsp;
|
|
2545 getch();
|
|
2546 return getsym();
|
|
2547 }
|
|
2548 sym = IDENT;
|
|
2549 gnptr=nptr=nptr0;
|
|
2550 if (mode==GDECL || mode==GSDECL || mode==GUDECL ||
|
|
2551 mode==GTDECL || mode==TOP)
|
|
2552 return sym;
|
|
2553 nptr1=lsearch();
|
|
2554 if (mode==STAT)
|
|
2555 if (nptr1->sc == EMPTY) return sym;
|
|
2556 else { nptr=nptr1; return sym;}
|
|
2557 nptr=nptr1;
|
|
2558 return sym;
|
|
2559 }
|
|
2560 else if (digit(ch))
|
|
2561 { symval=0;
|
|
2562 if (ch == '0')
|
|
2563 { if (getch() == 'x' || ch == 'X')
|
|
2564 while(1)
|
|
2565 if(digit(getch()))
|
|
2566 symval=symval*16+ch-'0';
|
|
2567 else if('a'<=ch&&ch<='f')
|
|
2568 symval=symval*16+ch-'a'+10;
|
|
2569 else if('A'<=ch&&ch<='F')
|
|
2570 symval=symval*16+ch-'A'+10;
|
|
2571 else break;
|
|
2572 else while (digit(ch)) {symval=symval*8+ch-'0';getch();}
|
|
2573 }
|
|
2574 else while(digit(ch)) {symval=symval*10+ch-'0';getch();}
|
|
2575 return sym=CONST;
|
|
2576 }
|
|
2577 else if(ch=='\'')
|
|
2578 { getch();
|
|
2579 symval=escape();
|
|
2580 if(ch!='\'') error(CHERR);
|
|
2581 getch();
|
|
2582 return sym=CONST;
|
|
2583 }
|
|
2584 else if(ch=='"')
|
|
2585 { getstring();
|
|
2586 return sym= STRING;
|
|
2587 }
|
|
2588 c=ch;
|
|
2589 getch();
|
|
2590 switch(c)
|
|
2591 {case '*':
|
|
2592 return postequ(MUL,MUL+AS);
|
|
2593 case '&':
|
|
2594 if(ch=='&') {getch();return sym=LAND;}
|
|
2595 return postequ(BAND,BAND+AS);
|
|
2596 case '-':
|
|
2597 if(ch=='>') {getch();return sym=ARROW;}
|
|
2598 if(ch=='-') {getch();return sym=DEC;}
|
|
2599 return postequ(SUB,SUB+AS);
|
|
2600 case '!':
|
|
2601 return postequ(LNOT,NEQ);
|
|
2602 case '~':
|
|
2603 return sym=BNOT;
|
|
2604 case '+':
|
|
2605 if(ch=='+') {getch();return sym=INC;}
|
|
2606 return postequ(ADD,ADD+AS);
|
|
2607 case '%':
|
|
2608 return postequ(MOD,MOD+AS);
|
|
2609 case '^':
|
|
2610 return postequ(EOR,EOR+AS);
|
|
2611 case '|':
|
|
2612 if(ch=='|') {getch();return sym=LOR;}
|
|
2613 return postequ(BOR,BOR+AS);
|
|
2614 case '=':
|
|
2615 return postequ(ASS,EQ);
|
|
2616 case '>':
|
|
2617 if(ch=='>') {getch();return postequ(RSHIFT,RSHIFT+AS);}
|
|
2618 return postequ(GT,GE);
|
|
2619 case '<':
|
|
2620 if(ch=='<') {getch();return postequ(LSHIFT,LSHIFT+AS);}
|
|
2621 return postequ(LT,LE);
|
|
2622 case '(':
|
|
2623 return sym=LPAR;
|
|
2624 case ')':
|
|
2625 return sym=RPAR;
|
|
2626 case '[':
|
|
2627 return sym=LBRA;
|
|
2628 case ']':
|
|
2629 return sym=RBRA;
|
|
2630 case '{':
|
|
2631 return sym=LC;
|
|
2632 case '}':
|
|
2633 return sym=RC;
|
|
2634 case ',':
|
|
2635 return sym=COMMA;
|
|
2636 case ';':
|
|
2637 return sym=SM;
|
|
2638 case ':':
|
|
2639 return sym=COLON;
|
|
2640 case '?':
|
|
2641 return sym=COND;
|
|
2642 case '.':
|
|
2643 return sym=PERIOD;
|
|
2644 case '/':
|
|
2645 if(ch!='*') return postequ(DIV,DIV+AS);
|
|
2646 getch();
|
|
2647 while(ch=='*'?getch()!='/':getch());
|
|
2648 getch();
|
|
2649 return getsym();
|
|
2650 default:
|
|
2651 error(CHERR);
|
|
2652 return getsym();
|
|
2653 }
|
|
2654 }
|
|
2655 postequ(s1,s2)
|
|
2656 int s1,s2;
|
|
2657 { if(ch=='=') {getch();return sym=s2;}
|
|
2658 return sym=s1;
|
|
2659 }
|
|
2660 alpha(c)
|
|
2661 char c;
|
|
2662 { return('a'<=c&&c<='z'||'A'<=c&&c<='Z'||c=='_');
|
|
2663 }
|
|
2664 digit(c)
|
|
2665 char c;
|
|
2666 { return('0'<=c&&c<='9');
|
|
2667 }
|
|
2668 NMTBL *gsearch()
|
|
2669 {NMTBL *nptr,*iptr;
|
|
2670 iptr=nptr= &ntable[hash % GSYMS];
|
|
2671 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
2672 { if (++nptr== &ntable[GSYMS]) nptr=ntable;
|
|
2673 if (nptr==iptr) error(GSERR);
|
|
2674 }
|
|
2675 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
2676 return nptr;
|
|
2677 }
|
|
2678 NMTBL *lsearch()
|
|
2679 {NMTBL *nptr,*iptr;
|
|
2680 iptr=nptr= &ntable[hash%LSYMS+GSYMS];
|
|
2681 while(nptr->sc!=EMPTY && neqname(nptr->nm))
|
|
2682 { if (++nptr== &ntable[LSYMS+GSYMS]) nptr= &ntable[GSYMS];
|
|
2683 if (nptr==iptr) error(LSERR);
|
|
2684 }
|
|
2685 if (nptr->sc == EMPTY) copy(nptr->nm);
|
|
2686 return nptr;
|
|
2687 }
|
|
2688 neqname(p)
|
|
2689 char *p;
|
|
2690 {char *q;
|
|
2691 q=name;
|
|
2692 while(*p) if(*p++ != *q++) return 1;
|
|
2693 return *q!=0;
|
|
2694 }
|
|
2695 copy(p)
|
|
2696 char *p;
|
|
2697 {char *q;
|
|
2698 q=name;
|
|
2699 while(*p++= *q++);
|
|
2700 }
|
|
2701 getstring()
|
|
2702 { getch();
|
|
2703 symval = 0;
|
|
2704 sptr = cheapp;
|
|
2705 while (ch != '"')
|
|
2706 { *cheapp++ = escape();
|
|
2707 symval++;
|
|
2708 if (cheapp >= cheap+CHEAPSIZE) error(STRERR);
|
|
2709 }
|
|
2710 getch();
|
|
2711 *cheapp++ = '\0';
|
|
2712 symval++;
|
|
2713 }
|
|
2714 skipspc()
|
|
2715 { while(ch=='\t'||ch=='\n'||ch==' '||ch=='\r') getch();
|
|
2716 return ch;
|
|
2717 }
|
|
2718 getch()
|
|
2719 { if(*chptr) return ch= *chptr++;
|
|
2720 if(mflag) {mflag=0;chptr=chptrsave;return ch=chsave;}
|
|
2721 getline();
|
|
2722 return getch();
|
|
2723 }
|
|
2724 char escape()
|
|
2725 {char c;
|
|
2726 if ((c=ch) == '\\')
|
|
2727 { if (digit(c=getch()))
|
|
2728 { c = ch-'0';
|
|
2729 if (digit(getch()))
|
|
2730 { c = c*8+ch-'0';
|
|
2731 if (digit(getch())) {c=c*8+ch-'0';getch();}
|
|
2732 }
|
|
2733 return c;
|
|
2734 }
|
|
2735 getch();
|
|
2736 switch(c)
|
|
2737 {case 'n':
|
|
2738 return '\n';
|
|
2739 case 't':
|
|
2740 return '\t';
|
|
2741 case 'b':
|
|
2742 return '\b';
|
|
2743 case 'r':
|
|
2744 return '\r';
|
|
2745 case 'f':
|
|
2746 return '\f';
|
|
2747 case '\n':
|
|
2748 return escape();
|
|
2749 default:
|
|
2750 return c;
|
|
2751 }
|
|
2752 }
|
|
2753 if (c == '\n') error(EXERR);
|
|
2754 getch();
|
|
2755 return c;
|
|
2756 }
|
|
2757 FILE *getfname()
|
|
2758 {int i;
|
|
2759 char name[14];
|
|
2760 getch();
|
|
2761 if(skipspc()!='"') error(INCERR);
|
|
2762 for(i=0;(getch()!='"' && ch!='\n');)
|
|
2763 if(i<13) name[i++]=ch;
|
|
2764 if(ch=='\n') error(INCERR);
|
|
2765 name[i]=0;
|
|
2766 return ( (filep+1)->fcb = fopen(name,"rc") );
|
|
2767 }
|
|
2768 getline()
|
|
2769 {int i;
|
|
2770 int c;
|
|
2771 lineno++;
|
|
2772 glineno++;
|
|
2773 chptr=linebuf;
|
|
2774 i=0;
|
|
2775 while ((*chptr++ = c = getc(filep->fcb)) != '\n')
|
|
2776 { if (++i > LBUFSIZE-2) error(LNERR);
|
|
2777 if (c==EOF)
|
|
2778 { error(EOFERR);
|
|
2779 --chptr;
|
|
2780 }
|
|
2781 }
|
|
2782 *chptr = '\0';
|
|
2783 if (lsrc && !asmf) printf("* %s",linebuf);
|
|
2784 if (*(chptr = linebuf) == '#')
|
|
2785 { ++chptr;
|
|
2786 if (macroeq("define"))
|
|
2787 { i=mode;
|
|
2788 mode=GDECL;
|
|
2789 ch= *chptr;
|
|
2790 if (getsym() == IDENT)
|
|
2791 { if (nptr->sc == EMPTY)
|
|
2792 { nptr->sc = MACRO;
|
|
2793 nptr->dsp = (int)cheapp;
|
|
2794 while ((*cheapp++ = c = *chptr++)
|
|
2795 && c != '\n');
|
|
2796 *cheapp++ = '\0';
|
|
2797 if (cheapp >= cheap+CHEAPSIZE)
|
|
2798 error(STRERR);
|
|
2799 if (!c) error(EOFERR);
|
|
2800 }
|
|
2801 else error(MCERR);
|
|
2802 }
|
|
2803 else error(MCERR);
|
|
2804 mode=i;
|
|
2805 *(chptr = linebuf) = '\0';
|
|
2806 }
|
|
2807 else if (macroeq("include"))
|
|
2808 { fprintf(stderr,"%s",linebuf);
|
|
2809 if(filep+1 >= filestack + FILES) error(FILERR);
|
|
2810 if ( ((filep+1)->fcb=getfname()) == NULL) error(FILERR);
|
|
2811 (filep+1)->ln=lineno;
|
|
2812 lineno=0;
|
|
2813 ++filep;
|
|
2814 *(chptr = linebuf) = '\0';
|
|
2815 }
|
106
|
2816 else if (macroeq("asm"))
|
|
2817 { if (asmf) error(MCERR);
|
|
2818 asmf = 2; lineno--; glineno--;
|
|
2819 chptr = ";;";
|
|
2820 }
|
99
|
2821 else if (macroeq("endasm"))
|
|
2822 { if (!asmf) error(MCERR);
|
|
2823 asmf = 0;
|
|
2824 }
|
|
2825 else if (macroeq(" "))
|
|
2826 getline();
|
|
2827 else error(MCERR);
|
|
2828 }
|
106
|
2829 if (asmf==2) asmf=1; /* return ";" to get correct macro alignment */
|
|
2830 else if (asmf==1) {
|
|
2831 while (asmf)
|
|
2832 { printf("%s",linebuf);
|
|
2833 getline();
|
|
2834 }
|
|
2835 }
|
|
2836
|
99
|
2837 }
|
|
2838
|
|
2839 macroeq(s)
|
|
2840 char *s;
|
|
2841 {char *p;
|
|
2842 for (p = chptr; *s;) if (*s++ != *p++) return 0;
|
|
2843 chptr = p;
|
|
2844 return 1;
|
|
2845 }
|
|
2846
|
|
2847 car(e)
|
|
2848 int e;
|
|
2849 { return heap[e];
|
|
2850 }
|
|
2851 cadr(e)
|
|
2852 int e;
|
|
2853 { return heap[e+1];
|
|
2854 }
|
|
2855 caddr(e)
|
|
2856 int e;
|
|
2857 { return heap[e+2];
|
|
2858 }
|
|
2859 cadddr(e)
|
|
2860 int e;
|
|
2861 { return heap[e+3];
|
|
2862 }
|
|
2863 list2(e1,e2)
|
|
2864 int e1,e2;
|
|
2865 {int e;
|
|
2866 e=getfree(2);
|
|
2867 heap[e]=e1;
|
|
2868 heap[e+1]=e2;
|
|
2869 return e;
|
|
2870 }
|
|
2871 list3(e1,e2,e3)
|
|
2872 int e1,e2,e3;
|
|
2873 {int e;
|
|
2874 e=getfree(3);
|
|
2875 heap[e]=e1;
|
|
2876 heap[e+1]=e2;
|
|
2877 heap[e+2]=e3;
|
|
2878 return e;
|
|
2879 }
|
|
2880 list4(e1,e2,e3,e4)
|
|
2881 int e1,e2,e3,e4;
|
|
2882 {int e;
|
|
2883 e=getfree(4);
|
|
2884 heap[e]=e1;
|
|
2885 heap[e+1]=e2;
|
|
2886 heap[e+2]=e3;
|
|
2887 heap[e+3]=e4;
|
|
2888 return e;
|
|
2889 }
|
|
2890 getfree(n)
|
|
2891 int n;
|
|
2892 {int e;
|
|
2893 switch (mode)
|
|
2894 {case GDECL: case GSDECL: case GUDECL: case GTDECL:
|
|
2895 e=gfree;
|
|
2896 gfree+=n;
|
|
2897 break;
|
|
2898 default:
|
|
2899 lfree-=n;
|
|
2900 e=lfree;
|
|
2901 }
|
|
2902 if(lfree<gfree) error(HPERR);
|
|
2903 return e;
|
|
2904 }
|
|
2905 rplacad(e,n)
|
|
2906 int e,n;
|
|
2907 { heap[e+1]=n;
|
|
2908 return e;
|
|
2909 }
|