| 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 | } |