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Annotation of OpenXM_contrib2/asir2018/builtin/print.c, Revision 1.3

1.1       noro        1: /*
                      2:  * Copyright (c) 1994-2000 FUJITSU LABORATORIES LIMITED
                      3:  * All rights reserved.
                      4:  *
                      5:  * FUJITSU LABORATORIES LIMITED ("FLL") hereby grants you a limited,
                      6:  * non-exclusive and royalty-free license to use, copy, modify and
                      7:  * redistribute, solely for non-commercial and non-profit purposes, the
                      8:  * computer program, "Risa/Asir" ("SOFTWARE"), subject to the terms and
                      9:  * conditions of this Agreement. For the avoidance of doubt, you acquire
                     10:  * only a limited right to use the SOFTWARE hereunder, and FLL or any
                     11:  * third party developer retains all rights, including but not limited to
                     12:  * copyrights, in and to the SOFTWARE.
                     13:  *
                     14:  * (1) FLL does not grant you a license in any way for commercial
                     15:  * purposes. You may use the SOFTWARE only for non-commercial and
                     16:  * non-profit purposes only, such as academic, research and internal
                     17:  * business use.
                     18:  * (2) The SOFTWARE is protected by the Copyright Law of Japan and
                     19:  * international copyright treaties. If you make copies of the SOFTWARE,
                     20:  * with or without modification, as permitted hereunder, you shall affix
                     21:  * to all such copies of the SOFTWARE the above copyright notice.
                     22:  * (3) An explicit reference to this SOFTWARE and its copyright owner
                     23:  * shall be made on your publication or presentation in any form of the
                     24:  * results obtained by use of the SOFTWARE.
                     25:  * (4) In the event that you modify the SOFTWARE, you shall notify FLL by
                     26:  * e-mail at risa-admin@sec.flab.fujitsu.co.jp of the detailed specification
                     27:  * for such modification or the source code of the modified part of the
                     28:  * SOFTWARE.
                     29:  *
                     30:  * THE SOFTWARE IS PROVIDED AS IS WITHOUT ANY WARRANTY OF ANY KIND. FLL
                     31:  * MAKES ABSOLUTELY NO WARRANTIES, EXPRESSED, IMPLIED OR STATUTORY, AND
                     32:  * EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS
                     33:  * FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF THIRD PARTIES'
                     34:  * RIGHTS. NO FLL DEALER, AGENT, EMPLOYEES IS AUTHORIZED TO MAKE ANY
                     35:  * MODIFICATIONS, EXTENSIONS, OR ADDITIONS TO THIS WARRANTY.
                     36:  * UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, TORT, CONTRACT,
                     37:  * OR OTHERWISE, SHALL FLL BE LIABLE TO YOU OR ANY OTHER PERSON FOR ANY
                     38:  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE OR CONSEQUENTIAL
                     39:  * DAMAGES OF ANY CHARACTER, INCLUDING, WITHOUT LIMITATION, DAMAGES
                     40:  * ARISING OUT OF OR RELATING TO THE SOFTWARE OR THIS AGREEMENT, DAMAGES
                     41:  * FOR LOSS OF GOODWILL, WORK STOPPAGE, OR LOSS OF DATA, OR FOR ANY
                     42:  * DAMAGES, EVEN IF FLL SHALL HAVE BEEN INFORMED OF THE POSSIBILITY OF
                     43:  * SUCH DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY. EVEN IF A PART
                     44:  * OF THE SOFTWARE HAS BEEN DEVELOPED BY A THIRD PARTY, THE THIRD PARTY
                     45:  * DEVELOPER SHALL HAVE NO LIABILITY IN CONNECTION WITH THE USE,
                     46:  * PERFORMANCE OR NON-PERFORMANCE OF THE SOFTWARE.
                     47:  *
1.3     ! noro       48:  * $OpenXM: OpenXM_contrib2/asir2018/builtin/print.c,v 1.2 2018/09/28 08:20:27 noro Exp $
1.1       noro       49: */
                     50: #include "ca.h"
                     51: #include "parse.h"
                     52:
                     53: void Psprintf(NODE,STRING *);
                     54:
                     55: void Pprintf();
                     56: void Pprint();
                     57: void Pquotetolist();
                     58: void Pobjtoquote();
                     59: void Peval_variables_in_quote();
                     60: void Pset_print_function();
                     61:
                     62: struct ftab print_tab[] = {
                     63:   {"printf",Pprintf,-99999999},
                     64:   {"print",Pprint,-2},
                     65:   {"objtoquote",Pobjtoquote,1},
                     66:   {"quotetolist",Pquotetolist,1},
                     67:   {"eval_variables_in_quote",Peval_variables_in_quote,1},
                     68:   {"set_print_function",Pset_print_function,-1},
                     69:   {0,0,0},
                     70: };
                     71:
                     72: extern int I_am_server;
                     73:
                     74: int wfep_mode;
                     75:
                     76: void Pprintf(NODE arg,pointer *rp)
                     77: {
                     78:   STRING s;
                     79:   if ( arg ) {
                     80:     Psprintf(arg,&s);
                     81:     /* engine for wfep */
                     82:     if ( wfep_mode ) {
                     83:       print_to_wfep((Obj)s);
                     84:     }else {
                     85:       printexpr(CO,(Obj)s);
                     86:       fflush(asir_out);
                     87:     }
                     88:   }
                     89:   *rp = 0;
                     90:   return;
                     91: }
                     92:
                     93: void Pprint(NODE arg,pointer *rp)
                     94: {
                     95:   Obj obj;
                     96:   STRING nl;
                     97:   Q opt;
                     98:
                     99:   /* engine for wfep */
                    100:   if ( wfep_mode ) {
                    101:     if ( arg ) {
                    102:       print_to_wfep((Obj)ARG0(arg));
                    103:       if ( !NEXT(arg) || ARG1(arg) ) {
                    104:         MKSTR(nl,"\r\n");
                    105:         print_to_wfep((Obj)nl);
                    106:       }
                    107:     }
                    108:     *rp = 0;
                    109:     return;
                    110:   }
                    111:   if ( arg ) {
                    112:     obj = (Obj)ARG0(arg);
                    113:     if ( NEXT(arg) ) {
                    114:       opt = (Q)ARG1(arg);
                    115:       if ( INT(opt) ) {
                    116:         printexpr(CO,obj);
1.2       noro      117:         switch ( ZTOS(opt) ) {
1.1       noro      118:           case 0:
                    119:             break;
                    120:           case 2:
                    121:             fflush(asir_out); break;
                    122:             break;
                    123:           case 1: default:
                    124:             putc('\n',asir_out); break;
                    125:         }
                    126:       } else
                    127:         error("print : invalid argument");
                    128:     } else {
                    129:       printexpr(CO,obj);
                    130:       putc('\n',asir_out);
                    131:     }
                    132:   }
                    133:   /* XXX : if ox_asir, we have to fflush always */
                    134:   if ( I_am_server )
                    135:     fflush(asir_out);
                    136:   *rp = 0;
                    137: }
                    138:
                    139: void Pobjtoquote(NODE arg,QUOTE *rp)
                    140: {
                    141:   objtoquote(ARG0(arg),rp);
                    142: }
                    143:
                    144: void Pquotetolist(NODE arg,LIST *rp)
                    145: {
1.3     ! noro      146:   QUOTE q;
        !           147:
1.1       noro      148:   asir_assert(ARG0(arg),O_QUOTE,"quotetolist");
1.3     ! noro      149:   q = (QUOTE)ARG0(arg);
        !           150:   fnodetotree((FNODE)BDY(q),q->pvs,rp);
1.1       noro      151: }
                    152:
                    153: void Peval_variables_in_quote(NODE arg,QUOTE *rp)
                    154: {
                    155:   FNODE fn;
                    156:
                    157:   asir_assert(ARG0(arg),O_QUOTE,"eval_variables_in_quote");
                    158:   fn = eval_pvar_in_fnode((FNODE)BDY((QUOTE)(ARG0(arg))));
                    159:   MKQUOTE(*rp,fn);
                    160: }
                    161:
                    162: /* fnode -> [tag,name,arg0,arg1,...] */
                    163:
1.3     ! noro      164: void fnodetotree(FNODE f,VS vs,LIST *rp)
1.1       noro      165: {
                    166:   LIST a1,a2,a3;
                    167:   NODE n,t,t0;
                    168:   STRING head,op,str;
                    169:   char *opname;
                    170:
                    171:   if ( !f ) {
                    172:     MKSTR(head,"internal");
                    173:     n = mknode(2,head,NULLP);
                    174:     MKLIST(*rp,n);
                    175:     return;
                    176:   }
                    177:   switch ( f->id ) {
                    178:     /* unary operators */
                    179:     case I_NOT: case I_PAREN: case I_MINUS:
                    180:       MKSTR(head,"u_op");
                    181:       switch ( f->id ) {
                    182:         case I_NOT:
                    183:           MKSTR(op,"!");
                    184:           break;
                    185:         case I_PAREN:
                    186:           MKSTR(op,"()");
                    187:           break;
                    188:         case I_MINUS:
                    189:           MKSTR(op,"-");
                    190:           break;
                    191:       }
1.3     ! noro      192:       fnodetotree((FNODE)FA0(f),vs,&a1);
1.1       noro      193:       n = mknode(3,head,op,a1);
                    194:       MKLIST(*rp,n);
                    195:       break;
                    196:
                    197:     /* binary operators */
                    198:     case I_BOP: case I_COP: case I_LOP: case I_AND: case I_OR:
                    199:       /* head */
                    200:       MKSTR(head,"b_op");
                    201:
                    202:       /* arg list */
                    203:       switch ( f->id ) {
                    204:         case I_AND: case I_OR:
1.3     ! noro      205:           fnodetotree((FNODE)FA0(f),vs,&a1);
        !           206:           fnodetotree((FNODE)FA1(f),vs,&a2);
1.1       noro      207:           break;
                    208:         default:
1.3     ! noro      209:           fnodetotree((FNODE)FA1(f),vs,&a1);
        !           210:           fnodetotree((FNODE)FA2(f),vs,&a2);
1.1       noro      211:           break;
                    212:       }
                    213:
                    214:       /* op */
                    215:       switch ( f->id ) {
                    216:         case I_BOP:
                    217:           MKSTR(op,((ARF)FA0(f))->name); break;
                    218:
                    219:         case I_COP:
                    220:           switch( (cid)FA0(f) ) {
                    221:             case C_EQ: opname = "=="; break;
                    222:             case C_NE: opname = "!="; break;
                    223:             case C_GT: opname = ">"; break;
                    224:             case C_LT: opname = "<"; break;
                    225:             case C_GE: opname = ">="; break;
                    226:             case C_LE: opname = "<="; break;
                    227:           }
                    228:           MKSTR(op,opname); break;
                    229:
                    230:         case I_LOP:
                    231:           switch( (lid)FA0(f) ) {
                    232:             case L_EQ: opname = "@=="; break;
                    233:             case L_NE: opname = "@!="; break;
                    234:             case L_GT: opname = "@>"; break;
                    235:             case L_LT: opname = "@<"; break;
                    236:             case L_GE: opname = "@>="; break;
                    237:             case L_LE: opname = "@<="; break;
                    238:             case L_AND: opname = "@&&"; break;
                    239:             case L_OR: opname = "@||"; break;
                    240:
                    241:             case L_NOT: opname = "@!";
                    242:               /* XXX : L_NOT is a unary operator */
                    243:               MKSTR(head,"u_op");
                    244:               MKSTR(op,opname);
                    245:               n = mknode(3,head,op,a1);
                    246:               MKLIST(*rp,n);
                    247:               return;
                    248:           }
                    249:           MKSTR(op,opname); break;
                    250:
                    251:         case I_AND:
                    252:           MKSTR(op,"&&"); break;
                    253:
                    254:         case I_OR:
                    255:           MKSTR(op,"||"); break;
                    256:       }
                    257:       n = mknode(4,head,op,a1,a2);
                    258:       MKLIST(*rp,n);
                    259:       break;
                    260:
                    261:     case I_NARYOP:
                    262:       /* head */
                    263:       MKSTR(head,"n_op");
                    264:       n = (NODE)FA1(f);
                    265:       for ( t0 = 0; n; n = NEXT(n) ) {
                    266:         NEXTNODE(t0,t);
1.3     ! noro      267:         fnodetotree((FNODE)BDY(n),vs,&a1);
1.1       noro      268:         BDY(t) = (pointer)a1;
                    269:       }
                    270:       MKSTR(op,((ARF)FA0(f))->name);
                    271:       MKNODE(t,op,t0);
                    272:       MKNODE(n,head,t);
                    273:       MKLIST(*rp,n);
                    274:       break;
                    275:
                    276:     /* ternary operators */
                    277:     case I_CE:
                    278:       MKSTR(head,"t_op");
                    279:       MKSTR(op,"?:");
1.3     ! noro      280:       fnodetotree((FNODE)FA0(f),vs,&a1);
        !           281:       fnodetotree((FNODE)FA1(f),vs,&a2);
        !           282:       fnodetotree((FNODE)FA2(f),vs,&a3);
1.1       noro      283:       n = mknode(5,head,op,a1,a2,a3);
                    284:       MKLIST(*rp,n);
                    285:       break;
                    286:
                    287:     /* lists */
                    288:     case I_LIST:
                    289:       n = (NODE)FA0(f);
                    290:       for ( t0 = 0; n; n = NEXT(n) ) {
                    291:         NEXTNODE(t0,t);
1.3     ! noro      292:         fnodetotree((FNODE)BDY(n),vs,&a1);
1.1       noro      293:         BDY(t) = (pointer)a1;
                    294:       }
                    295:       if ( t0 )
                    296:         NEXT(t) = 0;
                    297:       MKSTR(head,"list");
                    298:       MKNODE(n,head,t0);
                    299:       MKLIST(*rp,n);
                    300:       break;
                    301:
                    302:     /* function */
                    303:     case I_FUNC: case I_FUNC_QARG: case I_CAR: case I_CDR: case I_EV:
                    304:       MKSTR(head,"function");
                    305:       switch ( f->id ) {
                    306:         case I_FUNC: case I_FUNC_QARG:
                    307:           MKSTR(op,((FUNC)FA0(f))->fullname);
1.3     ! noro      308:           fnodetotree((FNODE)FA1(f),vs,&a1);
1.1       noro      309:           break;
                    310:         case I_CAR:
                    311:           MKSTR(op,"car");
1.3     ! noro      312:           fnodetotree((FNODE)FA0(f),vs,&a1);
1.1       noro      313:           break;
                    314:         case I_CDR:
                    315:           MKSTR(op,"cdr");
1.3     ! noro      316:           fnodetotree((FNODE)FA0(f),vs,&a1);
1.1       noro      317:           break;
                    318:         case I_EV:
                    319:           /* exponent vector; should be treated as function call */
                    320:           MKSTR(op,"exponent_vector");
1.3     ! noro      321:           fnodetotree(mkfnode(1,I_LIST,FA0(f)),vs,&a1);
1.1       noro      322:           break;
                    323:       }
                    324:       t0 = NEXT(BDY(a1)); /* XXX : skip the headers */
                    325:       MKNODE(t,op,t0);
                    326:       MKNODE(n,head,t);
                    327:       MKLIST(*rp,n);
                    328:       break;
                    329:
                    330:     case I_STR:
                    331:       MKSTR(head,"internal");
                    332:       MKSTR(str,FA0(f));
                    333:       n = mknode(2,head,str);
                    334:       MKLIST(*rp,n);
                    335:       break;
                    336:
                    337:     case I_FORMULA:
                    338:       MKSTR(head,"internal");
                    339:       n = mknode(2,head,FA0(f));
                    340:       MKLIST(*rp,n);
                    341:       break;
                    342:
                    343:     case I_PVAR:
                    344:       if ( FA1(f) )
                    345:         error("fnodetotree : not implemented yet");
                    346:       MKSTR(head,"variable");
1.3     ! noro      347:       GETPVNAME2(FA0(f),opname,vs);
1.1       noro      348:       MKSTR(op,opname);
                    349:       n = mknode(2,head,op);
                    350:       MKLIST(*rp,n);
                    351:       break;
                    352:
                    353:     default:
                    354:       error("fnodetotree : not implemented yet");
                    355:   }
                    356: }
                    357:
                    358: FNODE eval_pvar_in_fnode(FNODE f)
                    359: {
                    360:   FNODE a1,a2,a3;
                    361:   pointer r;
                    362:   NODE n,t,t0;
                    363:   QUOTE q;
                    364:
                    365:   if ( !f )
                    366:     return 0;
                    367:
                    368:   switch ( f->id ) {
                    369:     /* unary operators */
                    370:     case I_NOT: case I_PAREN: case I_MINUS:
                    371:       a1 = eval_pvar_in_fnode((FNODE)FA0(f));
                    372:       return mkfnode(1,f->id,a1);
                    373:
                    374:     /* binary operators */
                    375:     case I_AND: case I_OR:
                    376:       a1 = eval_pvar_in_fnode((FNODE)FA0(f));
                    377:       a2 = eval_pvar_in_fnode((FNODE)FA1(f));
                    378:       return mkfnode(3,f->id,a1,a2);
                    379:
                    380:     case I_BOP: case I_COP: case I_LOP:
                    381:       a1 = eval_pvar_in_fnode((FNODE)FA1(f));
                    382:       a2 = eval_pvar_in_fnode((FNODE)FA2(f));
                    383:       return mkfnode(4,f->id,FA0(f),a1,a2);
                    384:
                    385:     /* ternary operators */
                    386:     case I_CE:
                    387:       a1 = eval_pvar_in_fnode((FNODE)FA0(f));
                    388:       a2 = eval_pvar_in_fnode((FNODE)FA1(f));
                    389:       a3 = eval_pvar_in_fnode((FNODE)FA2(f));
                    390:       return mkfnode(5,f->id,a1,a2,a3);
                    391:
                    392:     /* lists */
                    393:     case I_LIST:
                    394:       n = (NODE)FA0(f);
                    395:       for ( t0 = 0; n; n = NEXT(n) ) {
                    396:         NEXTNODE(t0,t);
                    397:         BDY(t) = (pointer)eval_pvar_in_fnode(BDY(n));
                    398:       }
                    399:       if ( t0 )
                    400:         NEXT(t) = 0;
                    401:       return mkfnode(1,f->id,t0);
                    402:
                    403:     /* function */
                    404:     case I_FUNC:
                    405:       a1 = eval_pvar_in_fnode((FNODE)FA1(f));
                    406:       return mkfnode(2,f->id,FA0(f),a1);
                    407:       break;
                    408:     case I_CAR: case I_CDR:
                    409:       a1 = eval_pvar_in_fnode((FNODE)FA0(f));
                    410:       return mkfnode(1,f->id,a1);
                    411:     case I_EV:
                    412:       /* exponent vector */
                    413:       a1 = eval_pvar_in_fnode(mkfnode(1,I_LIST,FA0(f)));
                    414:       return mkfnode(1,f->id,a1);
                    415:
                    416:     case I_STR: case I_FORMULA:
                    417:       return f;
                    418:
                    419:     case I_PVAR: case I_INDEX:
                    420:     case I_POSTSELF: case I_PRESELF:
                    421:       r = eval(f);
                    422:       objtoquote(r,&q);
                    423:       return BDY(q);
                    424:
                    425:     default:
                    426:       error("eval_pvar_in_fnode : not implemented yet");
                    427:       /* NOTREACHED */
                    428:       return 0;
                    429:   }
                    430: }
                    431:
                    432: FNODE subst_in_fnode(FNODE f,V v,FNODE g)
                    433: {
                    434:   FNODE a1,a2,a3;
                    435:   DCP dc;
                    436:   V vf;
                    437:   NODE n,t,t0;
                    438:   Obj obj;
                    439:
                    440:   if ( !f )
                    441:     return 0;
                    442:
                    443:   switch ( f->id ) {
                    444:     /* unary operators */
                    445:     case I_NOT: case I_PAREN: case I_MINUS:
                    446:       a1 = subst_in_fnode((FNODE)FA0(f),v,g);
                    447:       return mkfnode(1,f->id,a1);
                    448:
                    449:     /* binary operators */
                    450:     case I_AND: case I_OR:
                    451:       a1 = subst_in_fnode((FNODE)FA0(f),v,g);
                    452:       a2 = subst_in_fnode((FNODE)FA1(f),v,g);
                    453:       return mkfnode(3,f->id,a1,a2);
                    454:
                    455:     case I_BOP: case I_COP: case I_LOP:
                    456:       a1 = subst_in_fnode((FNODE)FA1(f),v,g);
                    457:       a2 = subst_in_fnode((FNODE)FA2(f),v,g);
                    458:       return mkfnode(4,f->id,FA0(f),a1,a2);
                    459:
                    460:     /* ternary operators */
                    461:     case I_CE:
                    462:       a1 = subst_in_fnode((FNODE)FA0(f),v,g);
                    463:       a2 = subst_in_fnode((FNODE)FA1(f),v,g);
                    464:       a3 = subst_in_fnode((FNODE)FA2(f),v,g);
                    465:       return mkfnode(5,f->id,a1,a2,a3);
                    466:
                    467:     /* lists */
                    468:     case I_LIST:
                    469:       n = (NODE)FA0(f);
                    470:       for ( t0 = 0; n; n = NEXT(n) ) {
                    471:         NEXTNODE(t0,t);
                    472:         BDY(t) = (pointer)subst_in_fnode(BDY(n),v,g);
                    473:       }
                    474:       if ( t0 )
                    475:         NEXT(t) = 0;
                    476:       return mkfnode(1,f->id,t0);
                    477:
                    478:     /* function */
                    479:     case I_FUNC:
                    480:       a1 = subst_in_fnode((FNODE)FA1(f),v,g);
                    481:       return mkfnode(2,f->id,FA0(f),a1);
                    482:       break;
                    483:     case I_CAR: case I_CDR:
                    484:       a1 = subst_in_fnode((FNODE)FA0(f),v,g);
                    485:       return mkfnode(1,f->id,a1);
                    486:     case I_EV:
                    487:       /* exponent vector */
                    488:       a1 = subst_in_fnode(mkfnode(1,I_LIST,FA0(f)),v,g);
                    489:       return mkfnode(1,f->id,a1);
                    490:
                    491:     case I_STR:
                    492:       return f;
                    493:
                    494:     case I_FORMULA:
                    495:       obj = (Obj)FA0(f);
                    496:       if ( !obj )
                    497:         return f;
                    498:
                    499:       switch ( OID(obj) ) {
                    500:         case O_N:
                    501:           return f;
                    502:         case O_P:
                    503:           vf = VR((P)obj);
                    504:           dc = DC((P)obj);
                    505:           if ( vf != v )
                    506:             return f;
                    507:           else if ( UNIQ(DEG(dc)) && UNIQ((Q)COEF(dc)) )
                    508:             return g;
                    509:           else break;
                    510:         default:
                    511:           break;
                    512:       }
                    513:
                    514:     default:
                    515:       error("subst_in_fnode : not implemented yet");
                    516:       /* NOTREACHED */
                    517:       return 0;
                    518:   }
                    519: }
                    520:
                    521: /* not completed yet */
                    522:
                    523: #if 0
                    524: char *get_attribute(char *key,LIST attr)
                    525: {}
                    526:
                    527: void treetofnode(Obj obj,FNODE *f)
                    528: {
                    529:   NODE n;
                    530:   LIST attr;
                    531:   char *prop;
                    532:
                    533:   if ( obj || OID(obj) != O_LIST ) {
                    534:     /* internal object */
                    535:     *f = mkfnode(1,I_FORMULA,obj);
                    536:   } else {
                    537:     /* [attr(list),name(string),args(node)] */
                    538:     n = BDY((LIST)obj);
                    539:     attr = (LIST)BDY(n); n = NEXT(n);
                    540:     prop = get_attribute("asir",attr);
                    541:     if ( !strcmp(prop,"u_op") ) {
                    542:     } else if ( !strcmp(prop,"b_op") ) {
                    543:     } else if ( !strcmp(prop,"t_op") ) {
                    544:     } else if ( !strcmp(prop,"function") ) {
                    545:     }
                    546:       /* default will be set to P_FUNC */
                    547:   }
                    548: }
                    549: #endif
                    550:
                    551: FUNC user_print_function;
                    552:
                    553: void Pset_print_function(NODE arg,pointer *rp)
                    554: {
                    555:   if ( !arg )
                    556:     user_print_function = 0;
                    557:   else {
                    558:     gen_searchf(BDY((STRING)ARG0(arg)),&user_print_function);
                    559:   }
                    560:   *rp = 0;
                    561: }

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