projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 695246fe PK |
1 | static char *sccsid = "@(#)lval.c 1.1 (Berkeley) %G%"; |
| 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 | * A "variable" | |
| 16 | */ | |
| 17 | lvalue(r) | |
| 18 | register int *r; | |
| 19 | { | |
| 20 | register *c, *co; | |
| 21 | ||
| 22 | ppid(r[2]); | |
| 23 | for (c = r[3]; c != NIL; c = c[2]) { | |
| 24 | co = c[1]; | |
| 25 | if (co == NIL) | |
| 26 | continue; | |
| 27 | switch (co[0]) { | |
| 28 | case T_PTR: | |
| 29 | ppop("^"); | |
| 30 | continue; | |
| 31 | case T_ARY: | |
| 32 | arycod(co[1]); | |
| 33 | continue; | |
| 34 | case T_FIELD: | |
| 35 | ppop("."); | |
| 36 | ppid(co[1]); | |
| 37 | continue; | |
| 38 | case T_ARGL: | |
| 39 | ppid("{unexpected argument list}"); | |
| 40 | break; | |
| 41 | default: | |
| 42 | panic("lval2"); | |
| 43 | } | |
| 44 | } | |
| 45 | } | |
| 46 | ||
| 47 | /* | |
| 48 | * Subscripting | |
| 49 | */ | |
| 50 | arycod(el) | |
| 51 | register int *el; | |
| 52 | { | |
| 53 | ||
| 54 | ppbra("["); | |
| 55 | if (el != NIL) | |
| 56 | for (;;) { | |
| 57 | rvalue(el[1], NIL); | |
| 58 | el = el[2]; | |
| 59 | if (el == NIL) | |
| 60 | break; | |
| 61 | ppsep(", "); | |
| 62 | } | |
| 63 | else | |
| 64 | rvalue(NIL, NIL); | |
| 65 | ppket("]"); | |
| 66 | } |