projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 0fc6e47b KB |
1 | /*- |
| 2 | * %sccs.include.proprietary.c% | |
| 3 | */ | |
| 4 | ||
| cb9013b5 | 5 | #ifndef lint |
| 0fc6e47b KB |
6 | static char sccsid[] = "@(#)4.brace.c 4.2 (Berkeley) %G%"; |
| 7 | #endif /* not lint */ | |
| cb9013b5 RH |
8 | |
| 9 | #include <stdio.h> | |
| 10 | #include "def.h" | |
| 11 | #include "4.def.h" | |
| 12 | #include "3.def.h" | |
| 13 | ||
| 14 | ndbrace(v) /* determine whether braces needed around subparts of v */ | |
| 15 | /* return TRUE if v ends with IF THEN not in braces */ | |
| 16 | VERT v; | |
| 17 | { | |
| 18 | VERT w; | |
| 19 | int i; | |
| 20 | LOGICAL endif; | |
| 21 | endif = FALSE; | |
| 22 | for (i = 0; i < CHILDNUM(v); ++i) | |
| 23 | { | |
| 24 | endif = FALSE; | |
| 25 | for (w = LCHILD(v,i); DEFINED(w); w = RSIB(w)) | |
| 26 | endif = ndbrace(w); | |
| 27 | if (NTYPE(v) != DUMVX && NTYPE(v) != ITERVX && | |
| 28 | (!DEFINED(LCHILD(v,i)) || compound(v,i) || | |
| 29 | (endif && NTYPE(v) == IFVX && !IFTHEN(v) && i == THEN ))) | |
| 30 | /* DUMVX doesn't nest, ITERVX doen't nest since | |
| 31 | nesting is done at LOOPNODE, etc., must | |
| 32 | check for IFTHEN followed by unrelated ELSE */ | |
| 33 | { | |
| 34 | YESBRACE(v,i); | |
| 35 | endif = FALSE; | |
| 36 | } | |
| 37 | } | |
| 38 | return(endif || IFTHEN(v) ); | |
| 39 | } | |
| 40 | ||
| 41 | ||
| 42 | compound(v,ch) /* return TRUE iff subpart ch of v has multiple statements */ | |
| 43 | VERT v; | |
| 44 | int ch; | |
| 45 | { | |
| 46 | VERT w; | |
| 47 | w = LCHILD(v,ch); | |
| 48 | if (!DEFINED(w)) | |
| 49 | return(FALSE); | |
| 50 | if (NTYPE(w) == ITERVX) | |
| 51 | { | |
| 52 | ASSERT(DEFINED(NXT(w)),compound); | |
| 53 | if (LABEL(NXT(w))) | |
| 54 | return(TRUE); /* loop ends with labeled CONTINUE statement */ | |
| 55 | else | |
| 56 | return(compound(w,0)); | |
| 57 | } | |
| 58 | else if (DEFINED(RSIB(w))) | |
| 59 | return(TRUE); | |
| 60 | else if (NTYPE(w) == STLNVX && CODELINES(w) > 1) | |
| 61 | return(TRUE); | |
| 62 | else | |
| 63 | return(FALSE); | |
| 64 | } |