| 1 | %{ |
| 2 | static char *sccsid = "@(#)bc.y 4.7 (Berkeley) 89/09/15"; |
| 3 | int *getout(); |
| 4 | %} |
| 5 | %right '=' |
| 6 | %left '+' '-' |
| 7 | %left '*' '/' '%' |
| 8 | %right '^' |
| 9 | %left UMINUS |
| 10 | |
| 11 | %term LETTER DIGIT SQRT LENGTH _IF FFF EQ |
| 12 | %term _WHILE _FOR NE LE GE INCR DECR |
| 13 | %term _RETURN _BREAK _DEFINE BASE OBASE SCALE |
| 14 | %term EQPL EQMI EQMUL EQDIV EQREM EQEXP |
| 15 | %term _AUTO DOT |
| 16 | %term QSTR |
| 17 | |
| 18 | %{ |
| 19 | #include <sys/signal.h> |
| 20 | #include <stdio.h> |
| 21 | #include <varargs.h> |
| 22 | #include "pathnames.h" |
| 23 | FILE *in; |
| 24 | char cary[1000], *cp = { cary }; |
| 25 | char string[1000], *str = {string}; |
| 26 | int crs = '0'; |
| 27 | int rcrs = '0'; /* reset crs */ |
| 28 | int bindx = 0; |
| 29 | int lev = 0; |
| 30 | int ln; |
| 31 | char *ss; |
| 32 | int bstack[10] = { 0 }; |
| 33 | char *numb[15] = { |
| 34 | " 0", " 1", " 2", " 3", " 4", " 5", |
| 35 | " 6", " 7", " 8", " 9", " 10", " 11", |
| 36 | " 12", " 13", " 14" }; |
| 37 | int *pre, *post; |
| 38 | %} |
| 39 | %% |
| 40 | start : |
| 41 | | start stat tail |
| 42 | = output( $2 ); |
| 43 | | start def dargs ')' '{' dlist slist '}' |
| 44 | ={ bundle( 6,pre, $7, post ,"0",numb[lev],"Q"); |
| 45 | conout( $$, $2 ); |
| 46 | rcrs = crs; |
| 47 | output( "" ); |
| 48 | lev = bindx = 0; |
| 49 | } |
| 50 | ; |
| 51 | |
| 52 | dlist : tail |
| 53 | | dlist _AUTO dlets tail |
| 54 | ; |
| 55 | |
| 56 | stat : e |
| 57 | ={ bundle(2, $1, "ps." ); } |
| 58 | | |
| 59 | ={ bundle(1, "" ); } |
| 60 | | QSTR |
| 61 | ={ bundle(3,"[",$1,"]P");} |
| 62 | | LETTER '=' e |
| 63 | ={ bundle(3, $3, "s", $1 ); } |
| 64 | | LETTER '[' e ']' '=' e |
| 65 | ={ bundle(4, $6, $3, ":", geta($1)); } |
| 66 | | LETTER EQOP e |
| 67 | ={ bundle(6, "l", $1, $3, $2, "s", $1 ); } |
| 68 | | LETTER '[' e ']' EQOP e |
| 69 | ={ bundle(8,$3, ";", geta($1), $6, $5, $3, ":", geta($1));} |
| 70 | | _BREAK |
| 71 | ={ bundle(2, numb[lev-bstack[bindx-1]], "Q" ); } |
| 72 | | _RETURN '(' e ')' |
| 73 | = bundle(4, $3, post, numb[lev], "Q" ); |
| 74 | | _RETURN '(' ')' |
| 75 | = bundle(4, "0", post, numb[lev], "Q" ); |
| 76 | | _RETURN |
| 77 | = bundle(4,"0",post,numb[lev],"Q"); |
| 78 | | SCALE '=' e |
| 79 | = bundle(2, $3, "k"); |
| 80 | | SCALE EQOP e |
| 81 | = bundle(4,"K",$3,$2,"k"); |
| 82 | | BASE '=' e |
| 83 | = bundle(2,$3, "i"); |
| 84 | | BASE EQOP e |
| 85 | = bundle(4,"I",$3,$2,"i"); |
| 86 | | OBASE '=' e |
| 87 | = bundle(2,$3,"o"); |
| 88 | | OBASE EQOP e |
| 89 | = bundle(4,"O",$3,$2,"o"); |
| 90 | | '{' slist '}' |
| 91 | ={ $$ = $2; } |
| 92 | | FFF |
| 93 | ={ bundle(1,"fY"); } |
| 94 | | error |
| 95 | ={ bundle(1,"c"); } |
| 96 | | _IF CRS BLEV '(' re ')' stat |
| 97 | ={ conout( $7, $2 ); |
| 98 | bundle(3, $5, $2, " " ); |
| 99 | } |
| 100 | | _WHILE CRS '(' re ')' stat BLEV |
| 101 | ={ bundle(3, $6, $4, $2 ); |
| 102 | conout( $$, $2 ); |
| 103 | bundle(3, $4, $2, " " ); |
| 104 | } |
| 105 | | fprefix CRS re ';' e ')' stat BLEV |
| 106 | ={ bundle(5, $7, $5, "s.", $3, $2 ); |
| 107 | conout( $$, $2 ); |
| 108 | bundle(5, $1, "s.", $3, $2, " " ); |
| 109 | } |
| 110 | | '~' LETTER '=' e |
| 111 | ={ bundle(3,$4,"S",$2); } |
| 112 | ; |
| 113 | |
| 114 | EQOP : EQPL |
| 115 | ={ $$ = "+"; } |
| 116 | | EQMI |
| 117 | ={ $$ = "-"; } |
| 118 | | EQMUL |
| 119 | ={ $$ = "*"; } |
| 120 | | EQDIV |
| 121 | ={ $$ = "/"; } |
| 122 | | EQREM |
| 123 | ={ $$ = "%%"; } |
| 124 | | EQEXP |
| 125 | ={ $$ = "^"; } |
| 126 | ; |
| 127 | |
| 128 | fprefix : _FOR '(' e ';' |
| 129 | ={ $$ = $3; } |
| 130 | ; |
| 131 | |
| 132 | BLEV : |
| 133 | ={ --bindx; } |
| 134 | ; |
| 135 | |
| 136 | slist : stat |
| 137 | | slist tail stat |
| 138 | ={ bundle(2, $1, $3 ); } |
| 139 | ; |
| 140 | |
| 141 | tail : '\n' |
| 142 | ={ln++;} |
| 143 | | ';' |
| 144 | ; |
| 145 | |
| 146 | re : e EQ e |
| 147 | = bundle(3, $1, $3, "=" ); |
| 148 | | e '<' e |
| 149 | = bundle(3, $1, $3, ">" ); |
| 150 | | e '>' e |
| 151 | = bundle(3, $1, $3, "<" ); |
| 152 | | e NE e |
| 153 | = bundle(3, $1, $3, "!=" ); |
| 154 | | e GE e |
| 155 | = bundle(3, $1, $3, "!>" ); |
| 156 | | e LE e |
| 157 | = bundle(3, $1, $3, "!<" ); |
| 158 | | e |
| 159 | = bundle(2, $1, " 0!=" ); |
| 160 | ; |
| 161 | |
| 162 | e : e '+' e |
| 163 | = bundle(3, $1, $3, "+" ); |
| 164 | | e '-' e |
| 165 | = bundle(3, $1, $3, "-" ); |
| 166 | | '-' e %prec UMINUS |
| 167 | = bundle(3, " 0", $2, "-" ); |
| 168 | | e '*' e |
| 169 | = bundle(3, $1, $3, "*" ); |
| 170 | | e '/' e |
| 171 | = bundle(3, $1, $3, "/" ); |
| 172 | | e '%' e |
| 173 | = bundle(3, $1, $3, "%%" ); |
| 174 | | e '^' e |
| 175 | = bundle(3, $1, $3, "^" ); |
| 176 | | LETTER '[' e ']' |
| 177 | ={ bundle(3,$3, ";", geta($1)); } |
| 178 | | LETTER INCR |
| 179 | = bundle(4, "l", $1, "d1+s", $1 ); |
| 180 | | INCR LETTER |
| 181 | = bundle(4, "l", $2, "1+ds", $2 ); |
| 182 | | DECR LETTER |
| 183 | = bundle(4, "l", $2, "1-ds", $2 ); |
| 184 | | LETTER DECR |
| 185 | = bundle(4, "l", $1, "d1-s", $1 ); |
| 186 | | LETTER '[' e ']' INCR |
| 187 | = bundle(7,$3,";",geta($1),"d1+",$3,":",geta($1)); |
| 188 | | INCR LETTER '[' e ']' |
| 189 | = bundle(7,$4,";",geta($2),"1+d",$4,":",geta($2)); |
| 190 | | LETTER '[' e ']' DECR |
| 191 | = bundle(7,$3,";",geta($1),"d1-",$3,":",geta($1)); |
| 192 | | DECR LETTER '[' e ']' |
| 193 | = bundle(7,$4,";",geta($2),"1-d",$4,":",geta($2)); |
| 194 | | SCALE INCR |
| 195 | = bundle(1,"Kd1+k"); |
| 196 | | INCR SCALE |
| 197 | = bundle(1,"K1+dk"); |
| 198 | | SCALE DECR |
| 199 | = bundle(1,"Kd1-k"); |
| 200 | | DECR SCALE |
| 201 | = bundle(1,"K1-dk"); |
| 202 | | BASE INCR |
| 203 | = bundle(1,"Id1+i"); |
| 204 | | INCR BASE |
| 205 | = bundle(1,"I1+di"); |
| 206 | | BASE DECR |
| 207 | = bundle(1,"Id1-i"); |
| 208 | | DECR BASE |
| 209 | = bundle(1,"I1-di"); |
| 210 | | OBASE INCR |
| 211 | = bundle(1,"Od1+o"); |
| 212 | | INCR OBASE |
| 213 | = bundle(1,"O1+do"); |
| 214 | | OBASE DECR |
| 215 | = bundle(1,"Od1-o"); |
| 216 | | DECR OBASE |
| 217 | = bundle(1,"O1-do"); |
| 218 | | LETTER '(' cargs ')' |
| 219 | = bundle(4, $3, "l", getf($1), "x" ); |
| 220 | | LETTER '(' ')' |
| 221 | = bundle(3, "l", getf($1), "x" ); |
| 222 | | cons |
| 223 | ={ bundle(2, " ", $1 ); } |
| 224 | | DOT cons |
| 225 | ={ bundle(2, " .", $2 ); } |
| 226 | | cons DOT cons |
| 227 | ={ bundle(4, " ", $1, ".", $3 ); } |
| 228 | | cons DOT |
| 229 | ={ bundle(3, " ", $1, "." ); } |
| 230 | | DOT |
| 231 | ={ $$ = "l."; } |
| 232 | | LETTER |
| 233 | = { bundle(2, "l", $1 ); } |
| 234 | | LETTER '=' e |
| 235 | ={ bundle(3, $3, "ds", $1 ); } |
| 236 | | LETTER EQOP e %prec '=' |
| 237 | ={ bundle(6, "l", $1, $3, $2, "ds", $1 ); } |
| 238 | | LETTER '[' e ']' '=' e |
| 239 | = { bundle(5,$6,"d",$3,":",geta($1)); } |
| 240 | | LETTER '[' e ']' EQOP e |
| 241 | = { bundle(9,$3,";",geta($1),$6,$5,"d",$3,":",geta($1)); } |
| 242 | | LENGTH '(' e ')' |
| 243 | = bundle(2,$3,"Z"); |
| 244 | | SCALE '(' e ')' |
| 245 | = bundle(2,$3,"X"); /* must be before '(' e ')' */ |
| 246 | | '(' e ')' |
| 247 | = { $$ = $2; } |
| 248 | | '?' |
| 249 | ={ bundle(1, "?" ); } |
| 250 | | SQRT '(' e ')' |
| 251 | ={ bundle(2, $3, "v" ); } |
| 252 | | '~' LETTER |
| 253 | ={ bundle(2,"L",$2); } |
| 254 | | SCALE '=' e |
| 255 | = bundle(2,$3,"dk"); |
| 256 | | SCALE EQOP e %prec '=' |
| 257 | = bundle(4,"K",$3,$2,"dk"); |
| 258 | | BASE '=' e |
| 259 | = bundle(2,$3,"di"); |
| 260 | | BASE EQOP e %prec '=' |
| 261 | = bundle(4,"I",$3,$2,"di"); |
| 262 | | OBASE '=' e |
| 263 | = bundle(2,$3,"do"); |
| 264 | | OBASE EQOP e %prec '=' |
| 265 | = bundle(4,"O",$3,$2,"do"); |
| 266 | | SCALE |
| 267 | = bundle(1,"K"); |
| 268 | | BASE |
| 269 | = bundle(1,"I"); |
| 270 | | OBASE |
| 271 | = bundle(1,"O"); |
| 272 | ; |
| 273 | |
| 274 | cargs : eora |
| 275 | | cargs ',' eora |
| 276 | = bundle(2, $1, $3 ); |
| 277 | ; |
| 278 | eora: e |
| 279 | | LETTER '[' ']' |
| 280 | =bundle(2,"l",geta($1)); |
| 281 | ; |
| 282 | |
| 283 | cons : constant |
| 284 | ={ *cp++ = '\0'; } |
| 285 | |
| 286 | constant: |
| 287 | '_' |
| 288 | ={ $$ = cp; *cp++ = '_'; } |
| 289 | | DIGIT |
| 290 | ={ $$ = cp; *cp++ = $1; } |
| 291 | | constant DIGIT |
| 292 | ={ *cp++ = $2; } |
| 293 | ; |
| 294 | |
| 295 | CRS : |
| 296 | ={ $$ = cp; *cp++ = crs++; *cp++ = '\0'; |
| 297 | if(crs == '[')crs+=3; |
| 298 | if(crs == 'a')crs='{'; |
| 299 | if(crs >= 0241){yyerror("program too big"); |
| 300 | getout(); |
| 301 | } |
| 302 | bstack[bindx++] = lev++; } |
| 303 | ; |
| 304 | |
| 305 | def : _DEFINE LETTER '(' |
| 306 | ={ $$ = getf($2); |
| 307 | pre = ""; |
| 308 | post = ""; |
| 309 | lev = 1; |
| 310 | bstack[bindx=0] = 0; |
| 311 | } |
| 312 | ; |
| 313 | |
| 314 | dargs : |
| 315 | | lora |
| 316 | ={ pp( $1 ); } |
| 317 | | dargs ',' lora |
| 318 | ={ pp( $3 ); } |
| 319 | ; |
| 320 | |
| 321 | dlets : lora |
| 322 | ={ tp($1); } |
| 323 | | dlets ',' lora |
| 324 | ={ tp($3); } |
| 325 | ; |
| 326 | lora : LETTER |
| 327 | | LETTER '[' ']' |
| 328 | ={ $$ = geta($1); } |
| 329 | ; |
| 330 | |
| 331 | %% |
| 332 | # define error 256 |
| 333 | |
| 334 | int peekc = -1; |
| 335 | int sargc; |
| 336 | int ifile; |
| 337 | char **sargv; |
| 338 | |
| 339 | char funtab[52] = { |
| 340 | 01,0,02,0,03,0,04,0,05,0,06,0,07,0,010,0,011,0,012,0,013,0,014,0,015,0,016,0,017,0, |
| 341 | 020,0,021,0,022,0,023,0,024,0,025,0,026,0,027,0,030,0,031,0,032,0 }; |
| 342 | char atab[52] = { |
| 343 | 0241,0,0242,0,0243,0,0244,0,0245,0,0246,0,0247,0,0250,0,0251,0,0252,0,0253,0, |
| 344 | 0254,0,0255,0,0256,0,0257,0,0260,0,0261,0,0262,0,0263,0,0264,0,0265,0,0266,0, |
| 345 | 0267,0,0270,0,0271,0,0272,0}; |
| 346 | char *letr[26] = { |
| 347 | "a","b","c","d","e","f","g","h","i","j", |
| 348 | "k","l","m","n","o","p","q","r","s","t", |
| 349 | "u","v","w","x","y","z" } ; |
| 350 | char *dot = { "." }; |
| 351 | yylex(){ |
| 352 | int c, ch; |
| 353 | restart: |
| 354 | c = getch(); |
| 355 | peekc = -1; |
| 356 | while( c == ' ' || c == '\t' ) c = getch(); |
| 357 | if(c == '\\'){ |
| 358 | getch(); |
| 359 | goto restart; |
| 360 | } |
| 361 | if( c<= 'z' && c >= 'a' ) { |
| 362 | /* look ahead to look for reserved words */ |
| 363 | peekc = getch(); |
| 364 | if( peekc >= 'a' && peekc <= 'z' ){ /* must be reserved word */ |
| 365 | if( c=='i' && peekc=='f' ){ c=_IF; goto skip; } |
| 366 | if( c=='w' && peekc=='h' ){ c=_WHILE; goto skip; } |
| 367 | if( c=='f' && peekc=='o' ){ c=_FOR; goto skip; } |
| 368 | if( c=='s' && peekc=='q' ){ c=SQRT; goto skip; } |
| 369 | if( c=='r' && peekc=='e' ){ c=_RETURN; goto skip; } |
| 370 | if( c=='b' && peekc=='r' ){ c=_BREAK; goto skip; } |
| 371 | if( c=='d' && peekc=='e' ){ c=_DEFINE; goto skip; } |
| 372 | if( c=='s' && peekc=='c' ){ c= SCALE; goto skip; } |
| 373 | if( c=='b' && peekc=='a' ){ c=BASE; goto skip; } |
| 374 | if( c=='i' && peekc == 'b'){ c=BASE; goto skip; } |
| 375 | if( c=='o' && peekc=='b' ){ c=OBASE; goto skip; } |
| 376 | if( c=='d' && peekc=='i' ){ c=FFF; goto skip; } |
| 377 | if( c=='a' && peekc=='u' ){ c=_AUTO; goto skip; } |
| 378 | if( c == 'l' && peekc=='e'){ c=LENGTH; goto skip; } |
| 379 | if( c == 'q' && peekc == 'u'){getout();} |
| 380 | /* could not be found */ |
| 381 | return( error ); |
| 382 | skip: /* skip over rest of word */ |
| 383 | peekc = -1; |
| 384 | while( (ch = getch()) >= 'a' && ch <= 'z' ); |
| 385 | peekc = ch; |
| 386 | return( c ); |
| 387 | } |
| 388 | |
| 389 | /* usual case; just one single letter */ |
| 390 | |
| 391 | yylval = letr[c-'a']; |
| 392 | return( LETTER ); |
| 393 | } |
| 394 | if( c>= '0' && c <= '9' || c>= 'A' && c<= 'F' ){ |
| 395 | yylval = c; |
| 396 | return( DIGIT ); |
| 397 | } |
| 398 | switch( c ){ |
| 399 | case '.': return( DOT ); |
| 400 | case '=': |
| 401 | switch( peekc = getch() ){ |
| 402 | case '=': c=EQ; goto gotit; |
| 403 | case '+': c=EQPL; goto gotit; |
| 404 | case '-': c=EQMI; goto gotit; |
| 405 | case '*': c=EQMUL; goto gotit; |
| 406 | case '/': c=EQDIV; goto gotit; |
| 407 | case '%': c=EQREM; goto gotit; |
| 408 | case '^': c=EQEXP; goto gotit; |
| 409 | default: return( '=' ); |
| 410 | gotit: peekc = -1; return(c); |
| 411 | } |
| 412 | case '+': return( cpeek( '+', INCR, cpeek( '=', EQPL, '+') ) ); |
| 413 | case '-': return( cpeek( '-', DECR, cpeek( '=', EQMI, '-') ) ); |
| 414 | case '<': return( cpeek( '=', LE, '<' ) ); |
| 415 | case '>': return( cpeek( '=', GE, '>' ) ); |
| 416 | case '!': return( cpeek( '=', NE, '!' ) ); |
| 417 | case '/': |
| 418 | if((peekc = getch()) == '*'){ |
| 419 | peekc = -1; |
| 420 | while((getch() != '*') || ((peekc = getch()) != '/')); |
| 421 | peekc = -1; |
| 422 | goto restart; |
| 423 | } |
| 424 | else if (peekc == '=') { |
| 425 | c=EQDIV; |
| 426 | goto gotit; |
| 427 | } |
| 428 | else return(c); |
| 429 | case '*': |
| 430 | return( cpeek( '=', EQMUL, '*' ) ); |
| 431 | case '%': |
| 432 | return( cpeek( '=', EQREM, '%' ) ); |
| 433 | case '^': |
| 434 | return( cpeek( '=', EQEXP, '^' ) ); |
| 435 | case '"': |
| 436 | yylval = str; |
| 437 | while((c=getch()) != '"'){*str++ = c; |
| 438 | if(str >= &string[999]){yyerror("string space exceeded"); |
| 439 | getout(); |
| 440 | } |
| 441 | } |
| 442 | *str++ = '\0'; |
| 443 | return(QSTR); |
| 444 | default: return( c ); |
| 445 | } |
| 446 | } |
| 447 | |
| 448 | cpeek( c, yes, no ){ |
| 449 | if( (peekc=getch()) != c ) return( no ); |
| 450 | else { |
| 451 | peekc = -1; |
| 452 | return( yes ); |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | getch(){ |
| 457 | int ch; |
| 458 | loop: |
| 459 | ch = (peekc < 0) ? getc(in) : peekc; |
| 460 | peekc = -1; |
| 461 | if(ch != EOF)return(ch); |
| 462 | if(++ifile > sargc){ |
| 463 | if(ifile >= sargc+2)getout(); |
| 464 | in = stdin; |
| 465 | ln = 0; |
| 466 | goto loop; |
| 467 | } |
| 468 | fclose(in); |
| 469 | if((in = fopen(sargv[ifile],"r")) != NULL){ |
| 470 | ln = 0; |
| 471 | ss = sargv[ifile]; |
| 472 | goto loop; |
| 473 | } |
| 474 | yyerror("cannot open input file"); |
| 475 | } |
| 476 | # define b_sp_max 3000 |
| 477 | int b_space [ b_sp_max ]; |
| 478 | int * b_sp_nxt = { b_space }; |
| 479 | |
| 480 | int bdebug = 0; |
| 481 | /*VARARGS*/ |
| 482 | bundle(va_alist) va_dcl { |
| 483 | va_list ap; |
| 484 | int i, *q; |
| 485 | |
| 486 | va_start(ap); |
| 487 | i = va_arg(ap, int); |
| 488 | q = b_sp_nxt; |
| 489 | if( bdebug ) printf("bundle %d elements at %o\n",i, q ); |
| 490 | while(i-- > 0){ |
| 491 | if( b_sp_nxt >= & b_space[b_sp_max] ) yyerror( "bundling space exceeded" ); |
| 492 | * b_sp_nxt++ = va_arg(ap, int); |
| 493 | } |
| 494 | * b_sp_nxt++ = 0; |
| 495 | yyval = q; |
| 496 | va_end(ap); |
| 497 | return( q ); |
| 498 | } |
| 499 | |
| 500 | routput(p) int *p; { |
| 501 | if( bdebug ) printf("routput(%o)\n", p ); |
| 502 | if( p >= &b_space[0] && p < &b_space[b_sp_max]){ |
| 503 | /* part of a bundle */ |
| 504 | while( *p != 0 ) routput( *p++ ); |
| 505 | } |
| 506 | else printf( p ); /* character string */ |
| 507 | } |
| 508 | |
| 509 | output( p ) int *p; { |
| 510 | routput( p ); |
| 511 | b_sp_nxt = & b_space[0]; |
| 512 | printf( "\n" ); |
| 513 | fflush(stdout); |
| 514 | cp = cary; |
| 515 | crs = rcrs; |
| 516 | } |
| 517 | |
| 518 | conout( p, s ) int *p; char *s; { |
| 519 | printf("["); |
| 520 | routput( p ); |
| 521 | printf("]s%s\n", s ); |
| 522 | fflush(stdout); |
| 523 | lev--; |
| 524 | } |
| 525 | |
| 526 | yyerror( s ) char *s; { |
| 527 | if(ifile > sargc)ss="teletype"; |
| 528 | printf("c[%s on line %d, %s]pc\n", s ,ln+1,ss); |
| 529 | fflush(stdout); |
| 530 | cp = cary; |
| 531 | crs = rcrs; |
| 532 | bindx = 0; |
| 533 | lev = 0; |
| 534 | b_sp_nxt = &b_space[0]; |
| 535 | } |
| 536 | |
| 537 | pp( s ) char *s; { |
| 538 | /* puts the relevant stuff on pre and post for the letter s */ |
| 539 | |
| 540 | bundle(3, "S", s, pre ); |
| 541 | pre = yyval; |
| 542 | bundle(4, post, "L", s, "s." ); |
| 543 | post = yyval; |
| 544 | } |
| 545 | |
| 546 | tp( s ) char *s; { /* same as pp, but for temps */ |
| 547 | bundle(3, "0S", s, pre ); |
| 548 | pre = yyval; |
| 549 | bundle(4, post, "L", s, "s." ); |
| 550 | post = yyval; |
| 551 | } |
| 552 | |
| 553 | yyinit(argc,argv) int argc; char *argv[];{ |
| 554 | (void)signal(SIGINT, SIG_IGN); /* ignore all interrupts */ |
| 555 | sargv=argv; |
| 556 | sargc= -- argc; |
| 557 | if(sargc == 0)in=stdin; |
| 558 | else if((in = fopen(sargv[1],"r")) == NULL) { |
| 559 | yyerror("cannot open input file"); |
| 560 | in = stdin; |
| 561 | } |
| 562 | ifile = 1; |
| 563 | ln = 0; |
| 564 | ss = sargv[1]; |
| 565 | } |
| 566 | int *getout(){ |
| 567 | printf("q"); |
| 568 | fflush(stdout); |
| 569 | exit(0); |
| 570 | } |
| 571 | |
| 572 | int * |
| 573 | getf(p) char *p;{ |
| 574 | return(&funtab[2*(*p -0141)]); |
| 575 | } |
| 576 | int * |
| 577 | geta(p) char *p;{ |
| 578 | return(&atab[2*(*p - 0141)]); |
| 579 | } |
| 580 | |
| 581 | main(argc, argv) |
| 582 | char **argv; |
| 583 | { |
| 584 | int p[2]; |
| 585 | |
| 586 | |
| 587 | if (argc > 1 && *argv[1] == '-') { |
| 588 | if((argv[1][1] == 'd')||(argv[1][1] == 'c')){ |
| 589 | yyinit(--argc, ++argv); |
| 590 | yyparse(); |
| 591 | exit(0); |
| 592 | } |
| 593 | if(argv[1][1] != 'l'){ |
| 594 | printf("unrecognizable argument\n"); |
| 595 | fflush(stdout); |
| 596 | exit(1); |
| 597 | } |
| 598 | argv[1] = _PATH_LIBB; |
| 599 | } |
| 600 | pipe(p); |
| 601 | if (fork()==0) { |
| 602 | close(1); |
| 603 | dup(p[1]); |
| 604 | close(p[0]); |
| 605 | close(p[1]); |
| 606 | yyinit(argc, argv); |
| 607 | yyparse(); |
| 608 | exit(0); |
| 609 | } |
| 610 | close(0); |
| 611 | dup(p[0]); |
| 612 | close(p[0]); |
| 613 | close(p[1]); |
| 614 | execl(_PATH_DC, "dc", "-", (char *)0); |
| 615 | perror("bc: can't find dc"); |
| 616 | exit(1); |
| 617 | } |