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