projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b61b76c5 RC |
1 | /* readline.c 4.1 83/03/09 */ |
| 2 | /* | |
| 3 | * Read a line from the keyboard in the message line. The line | |
| 4 | * goes into caller provided buffer msg, whos size is maxlen bytes. | |
| 5 | */ | |
| 6 | ||
| 7 | #include "2648.h" | |
| 8 | ||
| 9 | readline(prompt, msg, maxlen) | |
| 10 | char *prompt; | |
| 11 | char *msg; | |
| 12 | int maxlen; | |
| 13 | { | |
| 14 | register char c; | |
| 15 | register char *cp; | |
| 16 | int oldx, oldy; | |
| 17 | int oldcuron; | |
| 18 | int oldquiet; | |
| 19 | extern int QUIET; | |
| 20 | ||
| 21 | oldx = _curx; oldy = _cury; | |
| 22 | oldcuron = _cursoron; | |
| 23 | areaclear(4, 4, 4+8, 719); | |
| 24 | setset(); | |
| 25 | zoomout(); | |
| 26 | curon(); | |
| 27 | movecurs(4, 4); | |
| 28 | texton(); | |
| 29 | ||
| 30 | oldquiet = QUIET; | |
| 31 | QUIET = 0; | |
| 32 | outstr(prompt); | |
| 33 | if (oldquiet) | |
| 34 | outstr("\r\n"); | |
| 35 | QUIET = oldquiet; | |
| 36 | ||
| 37 | for (cp=msg; ; cp) { | |
| 38 | fflush(stdout); | |
| 39 | c = getchar(); | |
| 40 | switch (c) { | |
| 41 | case '\n': | |
| 42 | case '\r': | |
| 43 | case ESC: | |
| 44 | *cp++ = 0; | |
| 45 | textoff(); | |
| 46 | movecurs(oldx, oldy); | |
| 47 | if (oldcuron == 0) | |
| 48 | curoff(); | |
| 49 | return; | |
| 50 | case '\b': | |
| 51 | if (--cp >= msg) | |
| 52 | outchar(c); | |
| 53 | else | |
| 54 | cp = msg; | |
| 55 | break; | |
| 56 | default: | |
| 57 | *cp++ = c; | |
| 58 | outstr(rdchar(c)); | |
| 59 | if (cp-msg >= maxlen) | |
| 60 | error("line too long"); | |
| 61 | } | |
| 62 | } | |
| 63 | } |