345 lines
7.9 KiB
C
345 lines
7.9 KiB
C
![]() |
/***** spin: pangen4.c *****/
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/* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
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/* All Rights Reserved. This software is for educational purposes only. */
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/* No guarantee whatsoever is expressed or implied by the distribution of */
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/* this code. Permission is given to distribute this code provided that */
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/* this introductory message is not removed and no monies are exchanged. */
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/* Software written by Gerard J. Holzmann. For tool documentation see: */
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/* http://spinroot.com/ */
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/* Send all bug-reports and/or questions to: bugs@spinroot.com */
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#include "spin.h"
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#include "y.tab.h"
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extern FILE *tc, *tb;
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extern Queue *qtab;
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extern Symbol *Fname;
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extern int lineno, m_loss, Pid, eventmapnr, multi_oval;
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extern short nocast, has_provided, has_sorted;
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extern char *R13[], *R14[], *R15[];
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static void check_proc(Lextok *, int);
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void
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undostmnt(Lextok *now, int m)
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{ Lextok *v;
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int i, j;
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if (!now)
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{ fprintf(tb, "0");
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return;
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}
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lineno = now->ln;
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Fname = now->fn;
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switch (now->ntyp) {
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case CONST: case '!': case UMIN:
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case '~': case '/': case '*':
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case '-': case '+': case '%':
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case LT: case GT: case '&':
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case '|': case LE: case GE:
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case NE: case EQ: case OR:
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case AND: case LSHIFT: case RSHIFT:
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case TIMEOUT: case LEN: case NAME:
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case FULL: case EMPTY: case 'R':
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case NFULL: case NEMPTY: case ENABLED:
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case '?': case PC_VAL: case '^':
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case C_EXPR:
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case NONPROGRESS:
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putstmnt(tb, now, m);
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break;
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case RUN:
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fprintf(tb, "delproc(0, now._nr_pr-1)");
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break;
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case 's':
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if (Pid == eventmapnr) break;
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if (m_loss)
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fprintf(tb, "if (_m == 2) ");
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putname(tb, "_m = unsend(", now->lft, m, ")");
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break;
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case 'r':
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if (Pid == eventmapnr) break;
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for (v = now->rgt, i=j=0; v; v = v->rgt, i++)
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if (v->lft->ntyp != CONST
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&& v->lft->ntyp != EVAL)
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j++;
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if (j == 0 && now->val >= 2)
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break; /* poll without side-effect */
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{ int ii = 0, jj;
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for (v = now->rgt; v; v = v->rgt)
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if ((v->lft->ntyp != CONST
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&& v->lft->ntyp != EVAL))
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ii++; /* nr of things bupped */
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if (now->val == 1)
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{ ii++;
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jj = multi_oval - ii - 1;
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fprintf(tb, "XX = trpt->bup.oval");
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if (multi_oval > 0)
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{ fprintf(tb, "s[%d]", jj);
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jj++;
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}
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fprintf(tb, ";\n\t\t");
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} else
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{ fprintf(tb, "XX = 1;\n\t\t");
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jj = multi_oval - ii - 1;
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}
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if (now->val < 2) /* not for channel poll */
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for (v = now->rgt, i = 0; v; v = v->rgt, i++)
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{ switch(v->lft->ntyp) {
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case CONST:
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case EVAL:
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fprintf(tb, "unrecv");
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putname(tb, "(", now->lft, m, ", XX-1, ");
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fprintf(tb, "%d, ", i);
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if (v->lft->ntyp == EVAL)
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undostmnt(v->lft->lft, m);
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else
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undostmnt(v->lft, m);
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fprintf(tb, ", %d);\n\t\t", (i==0)?1:0);
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break;
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default:
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fprintf(tb, "unrecv");
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putname(tb, "(", now->lft, m, ", XX-1, ");
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fprintf(tb, "%d, ", i);
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if (v->lft->sym
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&& !strcmp(v->lft->sym->name, "_"))
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{ fprintf(tb, "trpt->bup.oval");
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if (multi_oval > 0)
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fprintf(tb, "s[%d]", jj);
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} else
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putstmnt(tb, v->lft, m);
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fprintf(tb, ", %d);\n\t\t", (i==0)?1:0);
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if (multi_oval > 0)
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jj++;
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break;
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} }
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jj = multi_oval - ii - 1;
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if (now->val == 1 && multi_oval > 0)
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jj++; /* new 3.4.0 */
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for (v = now->rgt, i = 0; v; v = v->rgt, i++)
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{ switch(v->lft->ntyp) {
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case CONST:
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case EVAL:
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break;
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default:
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if (!v->lft->sym
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|| strcmp(v->lft->sym->name, "_") != 0)
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{ nocast=1; putstmnt(tb,v->lft,m);
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nocast=0; fprintf(tb, " = trpt->bup.oval");
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if (multi_oval > 0)
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fprintf(tb, "s[%d]", jj);
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fprintf(tb, ";\n\t\t");
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}
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if (multi_oval > 0)
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jj++;
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break;
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} }
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multi_oval -= ii;
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}
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break;
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case '@':
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fprintf(tb, "p_restor(II);\n\t\t");
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break;
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case ASGN:
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nocast=1; putstmnt(tb,now->lft,m);
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nocast=0; fprintf(tb, " = trpt->bup.oval");
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if (multi_oval > 0)
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{ multi_oval--;
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fprintf(tb, "s[%d]", multi_oval-1);
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}
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check_proc(now->rgt, m);
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break;
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case 'c':
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check_proc(now->lft, m);
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break;
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case '.':
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case GOTO:
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case ELSE:
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case BREAK:
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break;
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case C_CODE:
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fprintf(tb, "sv_restor();\n");
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break;
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case ASSERT:
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case PRINT:
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check_proc(now, m);
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break;
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case PRINTM:
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break;
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default:
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printf("spin: bad node type %d (.b)\n", now->ntyp);
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alldone(1);
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}
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}
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int
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any_undo(Lextok *now)
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{ /* is there anything to undo on a return move? */
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if (!now) return 1;
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switch (now->ntyp) {
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case 'c': return any_oper(now->lft, RUN);
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case ASSERT:
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case PRINT: return any_oper(now, RUN);
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case PRINTM:
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case '.':
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case GOTO:
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case ELSE:
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case BREAK: return 0;
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default: return 1;
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}
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}
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int
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any_oper(Lextok *now, int oper)
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{ /* check if an expression contains oper operator */
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if (!now) return 0;
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if (now->ntyp == oper)
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return 1;
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return (any_oper(now->lft, oper) || any_oper(now->rgt, oper));
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}
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static void
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check_proc(Lextok *now, int m)
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{
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if (!now)
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return;
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if (now->ntyp == '@' || now->ntyp == RUN)
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{ fprintf(tb, ";\n\t\t");
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undostmnt(now, m);
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}
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check_proc(now->lft, m);
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check_proc(now->rgt, m);
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}
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void
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genunio(void)
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{ char buf1[256];
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Queue *q; int i;
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ntimes(tc, 0, 1, R13);
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for (q = qtab; q; q = q->nxt)
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{ fprintf(tc, "\tcase %d:\n", q->qid);
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if (has_sorted)
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{ sprintf(buf1, "((Q%d *)z)->contents", q->qid);
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fprintf(tc, "#ifdef HAS_SORTED\n");
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fprintf(tc, "\t\tj = trpt->ipt;\n"); /* ipt was bup.oval */
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fprintf(tc, "#endif\n");
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fprintf(tc, "\t\tfor (k = j; k < ((Q%d *)z)->Qlen; k++)\n",
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q->qid);
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fprintf(tc, "\t\t{\n");
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for (i = 0; i < q->nflds; i++)
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fprintf(tc, "\t\t\t%s[k].fld%d = %s[k+1].fld%d;\n",
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buf1, i, buf1, i);
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fprintf(tc, "\t\t}\n");
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fprintf(tc, "\t\tj = ((Q0 *)z)->Qlen;\n");
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}
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sprintf(buf1, "((Q%d *)z)->contents[j].fld", q->qid);
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for (i = 0; i < q->nflds; i++)
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fprintf(tc, "\t\t%s%d = 0;\n", buf1, i);
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if (q->nslots==0)
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{ /* check if rendezvous succeeded, 1 level down */
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fprintf(tc, "\t\t_m = (trpt+1)->o_m;\n");
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fprintf(tc, "\t\tif (_m) (trpt-1)->o_pm |= 1;\n");
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fprintf(tc, "\t\tUnBlock;\n");
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} else
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fprintf(tc, "\t\t_m = trpt->o_m;\n");
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fprintf(tc, "\t\tbreak;\n");
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}
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ntimes(tc, 0, 1, R14);
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for (q = qtab; q; q = q->nxt)
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{ sprintf(buf1, "((Q%d *)z)->contents", q->qid);
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fprintf(tc, " case %d:\n", q->qid);
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if (q->nslots == 0)
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fprintf(tc, "\t\tif (strt) boq = from+1;\n");
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else if (q->nslots > 1) /* shift */
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{ fprintf(tc, "\t\tif (strt && slot<%d)\n",
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q->nslots-1);
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fprintf(tc, "\t\t{\tfor (j--; j>=slot; j--)\n");
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fprintf(tc, "\t\t\t{");
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for (i = 0; i < q->nflds; i++)
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{ fprintf(tc, "\t%s[j+1].fld%d =\n\t\t\t",
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buf1, i);
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fprintf(tc, "\t%s[j].fld%d;\n\t\t\t",
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buf1, i);
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}
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fprintf(tc, "}\n\t\t}\n");
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}
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strcat(buf1, "[slot].fld");
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fprintf(tc, "\t\tif (strt) {\n");
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for (i = 0; i < q->nflds; i++)
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fprintf(tc, "\t\t\t%s%d = 0;\n", buf1, i);
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fprintf(tc, "\t\t}\n");
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if (q->nflds == 1) /* set */
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fprintf(tc, "\t\tif (fld == 0) %s0 = fldvar;\n",
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buf1);
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else
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{ fprintf(tc, "\t\tswitch (fld) {\n");
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for (i = 0; i < q->nflds; i++)
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{ fprintf(tc, "\t\tcase %d:\t%s", i, buf1);
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fprintf(tc, "%d = fldvar; break;\n", i);
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}
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fprintf(tc, "\t\t}\n");
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}
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fprintf(tc, "\t\tbreak;\n");
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}
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ntimes(tc, 0, 1, R15);
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}
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int
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proper_enabler(Lextok *n)
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{
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if (!n) return 1;
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switch (n->ntyp) {
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case NEMPTY: case FULL:
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case NFULL: case EMPTY:
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case LEN: case 'R':
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case NAME:
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has_provided = 1;
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if (strcmp(n->sym->name, "_pid") == 0)
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return 1;
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return (!(n->sym->context));
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case CONST: case TIMEOUT:
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has_provided = 1;
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return 1;
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case ENABLED: case PC_VAL:
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return proper_enabler(n->lft);
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case '!': case UMIN: case '~':
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return proper_enabler(n->lft);
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case '/': case '*': case '-': case '+':
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case '%': case LT: case GT: case '&': case '^':
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case '|': case LE: case GE: case NE: case '?':
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case EQ: case OR: case AND: case LSHIFT:
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case RSHIFT: case 'c':
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return proper_enabler(n->lft) && proper_enabler(n->rgt);
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default:
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break;
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}
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return 0;
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}
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