projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 03b0bbc4 MT |
1 | /*- |
| 2 | * Copyright (c) 1990 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * %sccs.include.redist.c% | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef lint | |
| 9 | static char sccsid[] = "@(#)foldit.c 1.1 (Berkeley) %G%"; | |
| 10 | #endif /* not lint */ | |
| 11 | ||
| 12 | foldit(chunk, col, max) | |
| 13 | char *chunk; | |
| 14 | { | |
| 15 | register char *cp; | |
| 16 | ||
| 17 | /* | |
| 18 | * Keep track of column position. Insert hidden newline | |
| 19 | * if this chunk puts us over the limit. | |
| 20 | */ | |
| 21 | again: | |
| 22 | cp = chunk; | |
| 23 | while (*cp) { | |
| 24 | switch(*cp) { | |
| 25 | case '\n': | |
| 26 | case '\r': | |
| 27 | col = 0; | |
| 28 | break; | |
| 29 | case '\t': | |
| 30 | col = col + 8 &~ 07; | |
| 31 | break; | |
| 32 | case '\b': | |
| 33 | col = col ? col - 1 : 0; | |
| 34 | break; | |
| 35 | default: | |
| 36 | col++; | |
| 37 | } | |
| 38 | if (col > (max - 2)) { | |
| 39 | printf("\\\n"); | |
| 40 | col = 0; | |
| 41 | goto again; | |
| 42 | } | |
| 43 | cp++; | |
| 44 | } | |
| 45 | return (col); | |
| 46 | } |