projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| ebd61f12 | 1 | static char *sccsid = "@(#)case.c 2.1 (Berkeley) %G%"; |
| c125706d PK |
2 | /* Copyright (c) 1979 Regents of the University of California */ |
| 3 | # | |
| 4 | /* | |
| 5 | * pxp - Pascal execution profiler | |
| 6 | * | |
| 7 | * Bill Joy UCB | |
| 8 | * Version 1.2 January 1979 | |
| 9 | */ | |
| 10 | ||
| 11 | #include "0.h" | |
| 12 | #include "tree.h" | |
| 13 | ||
| 14 | /* | |
| 15 | * Case statement | |
| 450f9f2e PK |
16 | * r [0] T_CASE |
| 17 | * [1] lineof "case" | |
| 18 | * [2] expression | |
| 19 | * [3] list of cased statements: | |
| 20 | * cstat [0] T_CSTAT | |
| 21 | * [1] lineof ":" | |
| 22 | * [2] list of constant labels | |
| 23 | * [3] statement | |
| c125706d PK |
24 | */ |
| 25 | caseop(r) | |
| 26 | int *r; | |
| 27 | { | |
| 28 | register *cl, *cs, i; | |
| 29 | struct pxcnt scnt; | |
| 450f9f2e PK |
30 | # ifdef RMOTHERS |
| 31 | int *othersp; /* tree where others is, or NIL */ | |
| 32 | int hasothers; /* 1 if others found, else 0 */ | |
| 33 | # endif RMOTHERS | |
| c125706d | 34 | |
| 450f9f2e PK |
35 | # ifdef RMOTHERS |
| 36 | if (rmothers) { | |
| 37 | hasothers = needscaseguard(r,&othersp); | |
| 38 | if (hasothers) { | |
| 39 | precaseguard(r); | |
| 40 | } | |
| 41 | } | |
| 42 | # endif RMOTHERS | |
| c125706d PK |
43 | savecnt(&scnt); |
| 44 | ppkw("case"); | |
| 45 | ppspac(); | |
| 46 | rvalue(r[2], NIL); | |
| 47 | ppspac(); | |
| 48 | ppkw("of"); | |
| 49 | for (cl = r[3]; cl != NIL;) { | |
| 50 | cs = cl[1]; | |
| 51 | if (cs == NIL) | |
| 52 | continue; | |
| 53 | baroff(); | |
| 54 | ppgoin(DECL); | |
| 55 | setline(cs[1]); | |
| 56 | ppnl(); | |
| 57 | indent(); | |
| 58 | ppbra(NIL); | |
| 59 | cs = cs[2]; | |
| 60 | if (cs != NIL) { | |
| 61 | i = 0; | |
| 62 | for (;;) { | |
| 63 | gconst(cs[1]); | |
| 64 | cs = cs[2]; | |
| 65 | if (cs == NIL) | |
| 66 | break; | |
| 67 | i++; | |
| 68 | if (i == 7) { | |
| 69 | ppsep(","); | |
| 70 | ppitem(); | |
| 71 | i = 0; | |
| 72 | } else | |
| 73 | ppsep(", "); | |
| 74 | } | |
| 75 | } else | |
| 76 | ppid("{case label list}"); | |
| 77 | ppket(":"); | |
| 78 | cs = cl[1]; | |
| 79 | cs = cs[3]; | |
| 80 | getcnt(); | |
| 81 | ppgoin(STAT); | |
| 82 | if (cs != NIL && cs[0] == T_BLOCK) { | |
| 83 | ppnl(); | |
| 84 | indent(); | |
| 85 | baron(); | |
| 86 | ppstbl1(cs, STAT); | |
| 87 | baroff(); | |
| 88 | ppstbl2(); | |
| 89 | baron(); | |
| 90 | } else { | |
| 91 | baron(); | |
| 92 | statement(cs); | |
| 93 | } | |
| 94 | ppgoout(STAT); | |
| 95 | ppgoout(DECL); | |
| 96 | cl = cl[2]; | |
| 97 | if (cl == NIL) | |
| 98 | break; | |
| 99 | ppsep(";"); | |
| 100 | } | |
| 101 | if (rescnt(&scnt)) | |
| 102 | getcnt(); | |
| 103 | ppnl(); | |
| 104 | indent(); | |
| 105 | ppkw("end"); | |
| 450f9f2e PK |
106 | # ifdef RMOTHERS |
| 107 | if (rmothers) { | |
| 108 | if (hasothers) { | |
| 109 | postcaseguard(othersp); | |
| 110 | } | |
| 111 | } | |
| 112 | # endif RMOTHERS | |
| c125706d | 113 | } |