projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 97e3edfb DF |
1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | */ | |
| 6 | ||
| 7 | #ifndef lint | |
| 8 | static char sccsid[] = "@(#)readline.c 5.1 (Berkeley) %G%"; | |
| 9 | #endif not lint | |
| 10 | ||
| b61b76c5 RC |
11 | /* |
| 12 | * Read a line from the keyboard in the message line. The line | |
| 13 | * goes into caller provided buffer msg, whos size is maxlen bytes. | |
| 14 | */ | |
| 15 | ||
| 16 | #include "2648.h" | |
| 17 | ||
| 18 | readline(prompt, msg, maxlen) | |
| 19 | char *prompt; | |
| 20 | char *msg; | |
| 21 | int maxlen; | |
| 22 | { | |
| 23 | register char c; | |
| 24 | register char *cp; | |
| 25 | int oldx, oldy; | |
| 26 | int oldcuron; | |
| 27 | int oldquiet; | |
| 28 | extern int QUIET; | |
| 29 | ||
| 30 | oldx = _curx; oldy = _cury; | |
| 31 | oldcuron = _cursoron; | |
| 32 | areaclear(4, 4, 4+8, 719); | |
| 33 | setset(); | |
| 34 | zoomout(); | |
| 35 | curon(); | |
| 36 | movecurs(4, 4); | |
| 37 | texton(); | |
| 38 | ||
| 39 | oldquiet = QUIET; | |
| 40 | QUIET = 0; | |
| 41 | outstr(prompt); | |
| 42 | if (oldquiet) | |
| 43 | outstr("\r\n"); | |
| 44 | QUIET = oldquiet; | |
| 45 | ||
| 46 | for (cp=msg; ; cp) { | |
| 47 | fflush(stdout); | |
| 48 | c = getchar(); | |
| 49 | switch (c) { | |
| 50 | case '\n': | |
| 51 | case '\r': | |
| 52 | case ESC: | |
| 53 | *cp++ = 0; | |
| 54 | textoff(); | |
| 55 | movecurs(oldx, oldy); | |
| 56 | if (oldcuron == 0) | |
| 57 | curoff(); | |
| 58 | return; | |
| 59 | case '\b': | |
| 60 | if (--cp >= msg) | |
| 61 | outchar(c); | |
| 62 | else | |
| 63 | cp = msg; | |
| 64 | break; | |
| 65 | default: | |
| 66 | *cp++ = c; | |
| 67 | outstr(rdchar(c)); | |
| 68 | if (cp-msg >= maxlen) | |
| 69 | error("line too long"); | |
| 70 | } | |
| 71 | } | |
| 72 | } |