1 /* Copyright (c) 1979 Regents of the University of California */ 2 3 static char sccsid[] = "@(#)pcfunc.c 1.1 08/27/80"; 4 5 #include "whoami.h" 6 #ifdef PC 7 /* 8 * and to the end of the file 9 */ 10 #include "0.h" 11 #include "tree.h" 12 #include "opcode.h" 13 #include "pc.h" 14 #include "pcops.h" 15 16 bool cardempty = FALSE; 17 18 /* 19 * Funccod generates code for 20 * built in function calls and calls 21 * call to generate calls to user 22 * defined functions and procedures. 23 */ 24 pcfunccod( r ) 25 int *r; 26 { 27 struct nl *p; 28 register struct nl *p1; 29 register int *al; 30 register op; 31 int argc, *argv; 32 int tr[2], tr2[4]; 33 char *funcname; 34 long tempoff; 35 long temptype; 36 struct nl *rettype; 37 38 /* 39 * Verify that the given name 40 * is defined and the name of 41 * a function. 42 */ 43 p = lookup(r[2]); 44 if (p == NIL) { 45 rvlist(r[3]); 46 return (NIL); 47 } 48 if (p->class != FUNC) { 49 error("%s is not a function", p->symbol); 50 rvlist(r[3]); 51 return (NIL); 52 } 53 argv = r[3]; 54 /* 55 * Call handles user defined 56 * procedures and functions 57 */ 58 if (bn != 0) 59 return (call(p, argv, FUNC, bn)); 60 /* 61 * Count the arguments 62 */ 63 argc = 0; 64 for (al = argv; al != NIL; al = al[2]) 65 argc++; 66 /* 67 * Built-in functions have 68 * their interpreter opcode 69 * associated with them. 70 */ 71 op = p->value[0] &~ NSTAND; 72 if (opt('s') && (p->value[0] & NSTAND)) { 73 standard(); 74 error("%s is a nonstandard function", p->symbol); 75 } 76 if ( op == O_ARGC ) { 77 putleaf( P2NAME , 0 , 0 , P2INT , "__argc" ); 78 return nl + T4INT; 79 } 80 switch (op) { 81 /* 82 * Parameterless functions 83 */ 84 case O_CLCK: 85 funcname = "_CLCK"; 86 goto noargs; 87 case O_SCLCK: 88 funcname = "_SCLCK"; 89 goto noargs; 90 noargs: 91 if (argc != 0) { 92 error("%s takes no arguments", p->symbol); 93 rvlist(argv); 94 return (NIL); 95 } 96 putleaf( P2ICON , 0 , 0 97 , ADDTYPE( P2FTN | P2INT , P2PTR ) 98 , funcname ); 99 putop( P2UNARY P2CALL , P2INT ); 100 return (nl+T4INT); 101 case O_WCLCK: 102 if (argc != 0) { 103 error("%s takes no arguments", p->symbol); 104 rvlist(argv); 105 return (NIL); 106 } 107 putleaf( P2ICON , 0 , 0 108 , ADDTYPE( P2FTN | P2INT , P2PTR ) 109 , "_time" ); 110 putleaf( P2ICON , 0 , 0 , P2INT , 0 ); 111 putop( P2CALL , P2INT ); 112 return (nl+T4INT); 113 case O_EOF: 114 case O_EOLN: 115 if (argc == 0) { 116 argv = tr; 117 tr[1] = tr2; 118 tr2[0] = T_VAR; 119 tr2[2] = input->symbol; 120 tr2[1] = tr2[3] = NIL; 121 argc = 1; 122 } else if (argc != 1) { 123 error("%s takes either zero or one argument", p->symbol); 124 rvlist(argv); 125 return (NIL); 126 } 127 } 128 /* 129 * All other functions take 130 * exactly one argument. 131 */ 132 if (argc != 1) { 133 error("%s takes exactly one argument", p->symbol); 134 rvlist(argv); 135 return (NIL); 136 } 137 /* 138 * find out the type of the argument 139 */ 140 codeoff(); 141 p1 = stkrval((int *) argv[1], NLNIL , RREQ ); 142 codeon(); 143 if (p1 == NIL) 144 return (NIL); 145 /* 146 * figure out the return type and the funtion name 147 */ 148 switch (op) { 149 case O_EXP: 150 funcname = "_exp"; 151 goto mathfunc; 152 case O_SIN: 153 funcname = "_sin"; 154 goto mathfunc; 155 case O_COS: 156 funcname = "_cos"; 157 goto mathfunc; 158 case O_ATAN: 159 funcname = "_atan"; 160 goto mathfunc; 161 case O_LN: 162 funcname = opt('t') ? "_LN" : "_log"; 163 goto mathfunc; 164 case O_SQRT: 165 funcname = opt('t') ? "_SQRT" : "_sqrt"; 166 goto mathfunc; 167 case O_RANDOM: 168 funcname = "_RANDOM"; 169 goto mathfunc; 170 mathfunc: 171 if (isnta(p1, "id")) { 172 error("%s's argument must be integer or real, not %s", p->symbol, nameof(p1)); 173 return (NIL); 174 } 175 putleaf( P2ICON , 0 , 0 176 , ADDTYPE( P2FTN | P2DOUBLE , P2PTR ) , funcname ); 177 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 178 if ( isa( p1 , "i" ) ) { 179 putop( P2SCONV , P2DOUBLE ); 180 } 181 putop( P2CALL , P2DOUBLE ); 182 return nl + TDOUBLE; 183 case O_EXPO: 184 if (isnta( p1 , "id" ) ) { 185 error("%s's argument must be integer or real, not %s", p->symbol, nameof(p1)); 186 return NIL; 187 } 188 putleaf( P2ICON , 0 , 0 189 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_EXPO" ); 190 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 191 if ( isa( p1 , "i" ) ) { 192 putop( P2SCONV , P2DOUBLE ); 193 } 194 putop( P2CALL , P2INT ); 195 return ( nl + T4INT ); 196 case O_UNDEF: 197 if ( isnta( p1 , "id" ) ) { 198 error("%s's argument must be integer or real, not %s", p->symbol, nameof(p1)); 199 return NIL; 200 } 201 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 202 putleaf( P2ICON , 0 , 0 , P2INT , 0 ); 203 putop( P2COMOP , P2INT ); 204 return ( nl + TBOOL ); 205 case O_SEED: 206 if (isnta(p1, "i")) { 207 error("seed's argument must be an integer, not %s", nameof(p1)); 208 return (NIL); 209 } 210 putleaf( P2ICON , 0 , 0 211 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_SEED" ); 212 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 213 putop( P2CALL , P2INT ); 214 return nl + T4INT; 215 case O_ROUND: 216 case O_TRUNC: 217 if ( isnta( p1 , "d" ) ) { 218 error("%s's argument must be a real, not %s", p->symbol, nameof(p1)); 219 return (NIL); 220 } 221 putleaf( P2ICON , 0 , 0 222 , ADDTYPE( P2FTN | P2INT , P2PTR ) 223 , op == O_ROUND ? "_ROUND" : "_TRUNC" ); 224 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 225 putop( P2CALL , P2INT ); 226 return nl + T4INT; 227 case O_ABS2: 228 if ( isa( p1 , "d" ) ) { 229 putleaf( P2ICON , 0 , 0 230 , ADDTYPE( P2FTN | P2DOUBLE , P2PTR ) 231 , "_fabs" ); 232 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 233 putop( P2CALL , P2DOUBLE ); 234 return nl + TDOUBLE; 235 } 236 if ( isa( p1 , "i" ) ) { 237 putleaf( P2ICON , 0 , 0 238 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_abs" ); 239 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 240 putop( P2CALL , P2INT ); 241 return nl + T4INT; 242 } 243 error("%s's argument must be an integer or real, not %s", p->symbol, nameof(p1)); 244 return NIL; 245 case O_SQR2: 246 if ( isa( p1 , "d" ) ) { 247 temptype = P2DOUBLE; 248 rettype = nl + TDOUBLE; 249 sizes[ cbn ].om_off -= sizeof( double ); 250 } else if ( isa( p1 , "i" ) ) { 251 temptype = P2INT; 252 rettype = nl + T4INT; 253 sizes[ cbn ].om_off -= sizeof( long ); 254 } else { 255 error("%s's argument must be an integer or real, not %s", p->symbol, nameof(p1)); 256 return NIL; 257 } 258 tempoff = sizes[ cbn ].om_off; 259 if ( tempoff < sizes[ cbn ].om_max ) { 260 sizes[ cbn ].om_max = tempoff; 261 } 262 putlbracket( ftnno , -tempoff ); 263 putRV( 0 , cbn , tempoff , temptype , 0 ); 264 p1 = rvalue( (int *) argv[1] , NLNIL , RREQ ); 265 putop( P2ASSIGN , temptype ); 266 putRV( 0 , cbn , tempoff , temptype , 0 ); 267 putRV( 0 , cbn , tempoff , temptype , 0 ); 268 putop( P2MUL , temptype ); 269 putop( P2COMOP , temptype ); 270 return rettype; 271 case O_ORD2: 272 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 273 if (isa(p1, "bcis") || classify(p1) == TPTR) { 274 return (nl+T4INT); 275 } 276 error("ord's argument must be of scalar type or a pointer, not %s", nameof(p1)); 277 return (NIL); 278 case O_SUCC2: 279 case O_PRED2: 280 if (isa(p1, "d")) { 281 error("%s is forbidden for reals", p->symbol); 282 return (NIL); 283 } 284 if ( isnta( p1 , "bcsi" ) ) { 285 error("%s's argument must be of scalar type, not %s", p->symbol, nameof(p1)); 286 return NIL; 287 } 288 if ( opt( 't' ) ) { 289 putleaf( P2ICON , 0 , 0 290 , ADDTYPE( P2FTN | P2INT , P2PTR ) 291 , op == O_SUCC2 ? "_SUCC" : "_PRED" ); 292 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 293 putleaf( P2ICON , p1 -> range[0] , 0 , P2INT , 0 ); 294 putop( P2LISTOP , P2INT ); 295 putleaf( P2ICON , p1 -> range[1] , 0 , P2INT , 0 ); 296 putop( P2LISTOP , P2INT ); 297 putop( P2CALL , P2INT ); 298 } else { 299 p1 = rvalue( argv[1] , NIL , RREQ ); 300 putleaf( P2ICON , 1 , 0 , P2INT , 0 ); 301 putop( op == O_SUCC2 ? P2PLUS : P2MINUS , P2INT ); 302 } 303 if ( isa( p1 , "bcs" ) ) { 304 return p1; 305 } else { 306 return nl + T4INT; 307 } 308 case O_ODD2: 309 if (isnta(p1, "i")) { 310 error("odd's argument must be an integer, not %s", nameof(p1)); 311 return (NIL); 312 } 313 p1 = rvalue( (int *) argv[1] , NLNIL , RREQ ); 314 putleaf( P2ICON , 1 , 0 , P2INT , 0 ); 315 putop( P2AND , P2INT ); 316 return nl + TBOOL; 317 case O_CHR2: 318 if (isnta(p1, "i")) { 319 error("chr's argument must be an integer, not %s", nameof(p1)); 320 return (NIL); 321 } 322 if (opt('t')) { 323 putleaf( P2ICON , 0 , 0 324 , ADDTYPE( P2FTN | P2CHAR , P2PTR ) , "_CHR" ); 325 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 326 putop( P2CALL , P2CHAR ); 327 } else { 328 p1 = stkrval( (int *) argv[1] , NLNIL , RREQ ); 329 } 330 return nl + TCHAR; 331 case O_CARD: 332 if ( p1 != nl + TSET ) { 333 if (isnta(p1, "t")) { 334 error("Argument to card must be a set, not %s", nameof(p1)); 335 return (NIL); 336 } 337 putleaf( P2ICON , 0 , 0 338 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_CARD" ); 339 p1 = stkrval( (int *) argv[1] , NLNIL , LREQ ); 340 putleaf( P2ICON , lwidth( p1 ) , 0 , P2INT , 0 ); 341 putop( P2LISTOP , P2INT ); 342 putop( P2CALL , P2INT ); 343 } else { 344 if ( !cardempty ) { 345 warning(); 346 error("Cardinality of the empty set is 0." ); 347 cardempty = TRUE; 348 } 349 putleaf( P2ICON , 0 , 0 , P2INT , 0 ); 350 } 351 return nl + T2INT; 352 case O_EOLN: 353 if (!text(p1)) { 354 error("Argument to eoln must be a text file, not %s", nameof(p1)); 355 return (NIL); 356 } 357 putleaf( P2ICON , 0 , 0 358 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_TEOLN" ); 359 p1 = stklval( (int *) argv[1] , NOFLAGS ); 360 putop( P2CALL , P2INT ); 361 return nl + TBOOL; 362 case O_EOF: 363 if (p1->class != FILET) { 364 error("Argument to eof must be file, not %s", nameof(p1)); 365 return (NIL); 366 } 367 putleaf( P2ICON , 0 , 0 368 , ADDTYPE( P2FTN | P2INT , P2PTR ) , "_TEOF" ); 369 p1 = stklval( (int *) argv[1] , NOFLAGS ); 370 putop( P2CALL , P2INT ); 371 return nl + TBOOL; 372 case 0: 373 error("%s is an unimplemented 6000-3.4 extension", p->symbol); 374 default: 375 panic("func1"); 376 } 377 } 378 #endif PC 379