| 1 | #define lv yylval |
| 2 | #define v yyval |
| 3 | |
| 4 | |
| 5 | yylex() |
| 6 | { |
| 7 | register c; |
| 8 | register struct tab *tp; |
| 9 | extern TERMtype; |
| 10 | |
| 11 | if(nlexsym != -1) { |
| 12 | if (TERMtype == 1) dofix(); /* convert iline */ |
| 13 | c = nlexsym; |
| 14 | nlexsym = -1; |
| 15 | return(c); |
| 16 | |
| 17 | } |
| 18 | while(litflag > 0) { |
| 19 | if (TERMtype == 0)c = (int)*iline++; |
| 20 | else c = asciich(); |
| 21 | if(c == '\n') { |
| 22 | nlexsym = 0; |
| 23 | return(eol); |
| 24 | } |
| 25 | } |
| 26 | do |
| 27 | if (TERMtype == 0)c = (int)*iline++; |
| 28 | else c = asciich(); |
| 29 | while(c == ' '); |
| 30 | if(c == '\n') { |
| 31 | nlexsym = 0; |
| 32 | return(eol); |
| 33 | } |
| 34 | if(alpha(c)) |
| 35 | return(getnam(c)); |
| 36 | if(digit(c) || c == '@' || |
| 37 | (c=='.' && digit(*iline))) |
| 38 | return(getnum(c)); |
| 39 | c &= 0377; |
| 40 | for(tp = tab; tp->input; tp++) |
| 41 | if(tp->input == c) { |
| 42 | lv = tp->lexval; |
| 43 | return(tp->retval); |
| 44 | } |
| 45 | return(unk); |
| 46 | } |
| 47 | |
| 48 | getnam(ic) |
| 49 | { |
| 50 | char name[NAMS]; |
| 51 | register c; |
| 52 | register char *cp; |
| 53 | register struct nlist *np; |
| 54 | |
| 55 | cp = name; |
| 56 | do { |
| 57 | *cp++ = c; |
| 58 | if (TERMtype == 0)c = (int)*iline++; |
| 59 | else c = asciich(); |
| 60 | } while(alpha(c) || digit(c)); |
| 61 | *cp++ = 0; |
| 62 | iline--; |
| 63 | if(litflag < 0) { /* commands */ |
| 64 | litflag = 0; |
| 65 | for(c=0; comtab[c]; c+=3) |
| 66 | if(equal(name, comtab[c])) |
| 67 | break; |
| 68 | lv = comtab[c+2]; |
| 69 | return(comtab[c+1]); |
| 70 | } |
| 71 | if(a_label(name)){ |
| 72 | return(numb); |
| 73 | } |
| 74 | for(np=nlist; np->namep; np++) |
| 75 | if(equal(np->namep, name)) { |
| 76 | lv = np; |
| 77 | switch(np->use) { |
| 78 | |
| 79 | case NF: |
| 80 | return(nfun); |
| 81 | |
| 82 | case MF: |
| 83 | return(mfun); |
| 84 | |
| 85 | case DF: |
| 86 | return(dfun); |
| 87 | } |
| 88 | return(nam); |
| 89 | } |
| 90 | np->namep = alloc(cp-name); |
| 91 | copy(CH, name, np->namep, cp-name); |
| 92 | np->type = LV; |
| 93 | lv = np; |
| 94 | return(nam); |
| 95 | } |
| 96 | |
| 97 | a_label(x) |
| 98 | register char *x; |
| 99 | { |
| 100 | register struct lablist *lblthru; |
| 101 | |
| 102 | lblthru = labldefs.nextll; |
| 103 | while(lblthru) { |
| 104 | if(equal(lblthru->lname,x)) { |
| 105 | datum = (double) lblthru->lno; |
| 106 | return(1); |
| 107 | } |
| 108 | lblthru = lblthru->nextll; |
| 109 | } |
| 110 | return(0); |
| 111 | } |
| 112 | |
| 113 | getnum(ic) |
| 114 | { |
| 115 | double d1, d2; |
| 116 | register c, n, n1; |
| 117 | int s, s1; |
| 118 | |
| 119 | s = 0; |
| 120 | n = 0; |
| 121 | d1 = 0.; |
| 122 | c = ic; |
| 123 | if(c == '@') { |
| 124 | s++; |
| 125 | if (TERMtype == 0)c = (int)*iline++; |
| 126 | else c = asciich(); |
| 127 | } |
| 128 | while(digit(c)) { |
| 129 | d1 = d1*10. + c - '0'; |
| 130 | if (TERMtype == 0)c = (int)*iline++; |
| 131 | else c = asciich(); |
| 132 | } |
| 133 | if(c == '.') { |
| 134 | if (TERMtype == 0)c = (int)*iline++; |
| 135 | else c = asciich(); |
| 136 | while(digit(c)) { |
| 137 | d1 = d1*10. + c - '0'; |
| 138 | if (TERMtype == 0)c = (int)*iline++; |
| 139 | else c = asciich(); |
| 140 | n--; |
| 141 | } |
| 142 | } |
| 143 | if(c == 'e') { |
| 144 | s1 = 0; |
| 145 | n1 = 0; |
| 146 | if (TERMtype == 0)c = (int)*iline++; |
| 147 | else c = asciich(); |
| 148 | if(c == '@') { |
| 149 | s1++; |
| 150 | if (TERMtype == 0)c = (int)*iline++; |
| 151 | else c = asciich(); |
| 152 | } |
| 153 | while(digit(c)) { |
| 154 | n1 = n1*10 + c - '0'; |
| 155 | if (TERMtype == 0)c = (int)*iline++; |
| 156 | else c = asciich(); |
| 157 | } |
| 158 | if(s1) |
| 159 | n -= n1; else |
| 160 | n += n1; |
| 161 | } |
| 162 | n1 = n; |
| 163 | if(n1 < 0) |
| 164 | n1 = -n1; |
| 165 | d2 = 1.; |
| 166 | while(n1--) |
| 167 | d2 *= 10.; |
| 168 | if(n < 0) |
| 169 | d1 /= d2; else |
| 170 | d1 *= d2; |
| 171 | if(s) |
| 172 | d1 = -d1; |
| 173 | iline--; |
| 174 | datum = d1; |
| 175 | return(numb); |
| 176 | } |
| 177 | |
| 178 | alpha(s) |
| 179 | { |
| 180 | register c; |
| 181 | |
| 182 | c = s & 0377; |
| 183 | if(c >= 'a' && c <= 'z') |
| 184 | return(1); |
| 185 | if(c == 'H') |
| 186 | return(1); |
| 187 | if(c == 'F') |
| 188 | return(1); |
| 189 | if(c >= 0220 && c<=0252) |
| 190 | return(1); |
| 191 | return(0); |
| 192 | } |
| 193 | |
| 194 | digit(s) |
| 195 | { |
| 196 | register c; |
| 197 | |
| 198 | c = s; |
| 199 | if(c >='0' && c <= '9') |
| 200 | return(1); |
| 201 | return(0); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * s is statement |
| 206 | * f is execution flag: |
| 207 | * 0 compile immediate |
| 208 | * 1 compile L |
| 209 | * 2 function definition |
| 210 | * 3 function prolog |
| 211 | * 4 function epilog |
| 212 | * 5 function body |
| 213 | */ |
| 214 | int ilex[] |
| 215 | { |
| 216 | lex0, lex1, lex2, lex3, lex4, lex5, lex6 |
| 217 | }; |
| 218 | compile(s, f) |
| 219 | { |
| 220 | register char *p, *q; |
| 221 | char oline[OBJS]; |
| 222 | |
| 223 | iline = s; |
| 224 | ccharp = oline; |
| 225 | litflag = 0; |
| 226 | nlexsym = ilex[f]; |
| 227 | context = nlexsym; |
| 228 | if(yyparse()) { |
| 229 | pline(s, iline-s); |
| 230 | return(0); |
| 231 | } |
| 232 | *ccharp++ = EOF; |
| 233 | p = alloc(ccharp-oline); |
| 234 | iline = p; |
| 235 | for(q=oline; q<ccharp;) |
| 236 | *p++ = *q++; |
| 237 | return(iline); |
| 238 | } |
| 239 | |
| 240 | yyerror() |
| 241 | { |
| 242 | } |
| 243 | |
| 244 | name(np, c2) |
| 245 | { |
| 246 | register char *p; |
| 247 | |
| 248 | p = ccharp; |
| 249 | *ccharp++ = c2; |
| 250 | *ccharp++ = np.c[0]; |
| 251 | *ccharp++ = np.c[1]; |
| 252 | *ccharp++ = np.c[2]; |
| 253 | *ccharp++ = np.c[3]; |
| 254 | return(p); |
| 255 | } |
| 256 | |
| 257 | equal(a, b) |
| 258 | char *a, *b; |
| 259 | { |
| 260 | register char *c1, *c2; |
| 261 | |
| 262 | c1 = a; |
| 263 | c2 = b; |
| 264 | while(*c1++ == *c2) |
| 265 | if(*c2++ == 0) |
| 266 | return(1); |
| 267 | return(0); |
| 268 | } |
| 269 | |
| 270 | invert(a, b) |
| 271 | { |
| 272 | |
| 273 | flop(a, b); |
| 274 | flop(b, ccharp); |
| 275 | flop(a, ccharp); |
| 276 | } |
| 277 | |
| 278 | flop(a, b) |
| 279 | char *a, *b; |
| 280 | { |
| 281 | register char *a1, *a2; |
| 282 | register c; |
| 283 | |
| 284 | a1 = a; |
| 285 | a2 = b; |
| 286 | while(a1 < a2) { |
| 287 | c = *a1; |
| 288 | *a1++ = *--a2; |
| 289 | *a2 = c; |
| 290 | } |
| 291 | } |