Rev 2946 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2936 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Jiri Svoboda |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | /** @addtogroup debug |
||
| 30 | * @{ |
||
| 31 | */ |
||
| 32 | /** @file |
||
| 33 | */ |
||
| 34 | |||
| 35 | #include <stdio.h> |
||
| 36 | #include <stdlib.h> |
||
| 37 | |||
| 38 | #include "cons.h" |
||
| 39 | |||
| 40 | static char *line_buffer; |
||
| 41 | static int line_chars; |
||
| 42 | |||
| 43 | static int line_active = 0; |
||
| 44 | |||
| 45 | static void line_show(void) |
||
| 46 | { |
||
| 47 | int i; |
||
| 48 | |||
| 49 | printf("> "); |
||
| 50 | for (i = 0; i < line_chars; ++i) |
||
| 51 | putchar(line_buffer[i]); |
||
| 4380 | svoboda | 52 | |
| 53 | fflush(stdout); |
||
| 2936 | svoboda | 54 | } |
| 55 | |||
| 56 | static void line_hide(void) |
||
| 57 | { |
||
| 58 | int i; |
||
| 59 | |||
| 60 | printf("\b\b"); |
||
| 61 | for (i = 0; i < line_chars; ++i) |
||
| 62 | putchar('\b'); |
||
| 63 | } |
||
| 64 | |||
| 65 | void cons_printf(const char *fmt, ...) |
||
| 66 | { |
||
| 67 | va_list ap; |
||
| 68 | |||
| 69 | if (line_active) line_hide(); |
||
| 70 | va_start(ap, fmt); |
||
| 71 | vprintf(fmt, ap); |
||
| 72 | va_end(ap); |
||
| 73 | if (line_active) line_show(); |
||
| 74 | } |
||
| 75 | |||
| 76 | void cons_read_line(char *buffer, int n) |
||
| 77 | { |
||
| 78 | char c; |
||
| 79 | |||
| 80 | line_buffer = buffer; |
||
| 81 | line_chars = 0; |
||
| 82 | |||
| 83 | line_active = 1; |
||
| 84 | line_show(); |
||
| 85 | |||
| 86 | line_chars = 0; |
||
| 87 | while (line_chars < n - 1) { |
||
| 88 | c = getchar(); |
||
| 89 | if (c == '\n') break; |
||
| 90 | if (c == '\b') { |
||
| 91 | if (line_chars > 0) { |
||
| 92 | putchar('\b'); |
||
| 93 | --line_chars; |
||
| 94 | } |
||
| 95 | continue; |
||
| 96 | } |
||
| 97 | |||
| 98 | putchar(c); |
||
| 99 | buffer[line_chars++] = c; |
||
| 100 | } |
||
| 101 | |||
| 102 | putchar('\n'); |
||
| 103 | buffer[line_chars] = '\0'; |
||
| 104 | |||
| 105 | line_active = 0; |
||
| 106 | } |
||
| 107 | |||
| 108 | /** @} |
||
| 109 | */ |