| 1 | /*
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| 2 | * Copyright (c) 2012 Sandeep Kumar
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| 3 | * Copyright (c) 2012 Vojtech Horky
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup kernel_generic_console
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| 31 | * @{
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| 32 | */
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| 33 |
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| 34 | /**
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| 35 | * @file
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| 36 | * @brief Kernel console special prompts.
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| 37 | */
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| 38 |
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| 39 | #include <assert.h>
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| 40 | #include <console/prompt.h>
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| 41 |
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| 42 | /** Display the <i>display all possibilities</i> prompt and wait for answer.
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| 43 | *
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| 44 | * @param indev Where to read characters from.
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| 45 | * @param hints Number of hints that would be displayed.
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| 46 | *
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| 47 | * @return Whether to print all hints.
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| 48 | *
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| 49 | */
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| 50 | bool console_prompt_display_all_hints(indev_t *indev, size_t hints)
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| 51 | {
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| 52 | assert(indev);
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| 53 | assert(hints > 0);
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| 54 |
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| 55 | printf("Display all %zu possibilities? (y or n) ", hints);
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| 56 |
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| 57 | while (true) {
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| 58 | wchar_t answer = indev_pop_character(indev);
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| 59 |
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| 60 | if ((answer == 'y') || (answer == 'Y')) {
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| 61 | printf("y");
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| 62 | return true;
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| 63 | }
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| 64 |
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| 65 | if ((answer == 'n') || (answer == 'N')) {
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| 66 | printf("n");
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| 67 | return false;
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| 68 | }
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| 69 | }
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| 70 | }
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| 71 |
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| 72 | /** Display the <i>--more--</i> prompt and wait for answer.
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| 73 | *
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| 74 | * When the function returns false, @p display_hints is set to zero.
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| 75 | *
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| 76 | * @param[in] indev Where to read characters from.
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| 77 | * @param[out] display_hints How many hints to display.
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| 78 | *
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| 79 | * @return Whether to display more hints.
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| 80 | *
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| 81 | */
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| 82 | bool console_prompt_more_hints(indev_t *indev, size_t *display_hints)
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| 83 | {
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| 84 | assert(indev);
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| 85 | assert(display_hints != NULL);
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| 86 |
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| 87 | printf("--More--");
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| 88 | while (true) {
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| 89 | wchar_t continue_showing_hints = indev_pop_character(indev);
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| 90 | /* Display a full page again? */
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| 91 | if ((continue_showing_hints == 'y') ||
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| 92 | (continue_showing_hints == 'Y') ||
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| 93 | (continue_showing_hints == ' ')) {
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| 94 | *display_hints = MAX_TAB_HINTS - 1;
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| 95 | break;
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| 96 | }
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| 97 |
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| 98 | /* Stop displaying hints? */
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| 99 | if ((continue_showing_hints == 'n') ||
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| 100 | (continue_showing_hints == 'N') ||
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| 101 | (continue_showing_hints == 'q') ||
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| 102 | (continue_showing_hints == 'Q')) {
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| 103 | *display_hints = 0;
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| 104 | break;
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| 105 | }
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| 106 |
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| 107 | /* Show one more hint? */
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| 108 | if (continue_showing_hints == '\n') {
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| 109 | *display_hints = 1;
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| 110 | break;
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | /* Delete the --More-- option */
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| 115 | printf("\r \r");
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| 116 |
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| 117 | return *display_hints > 0;
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| 118 | }
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| 119 |
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| 120 | /** @}
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| 121 | */
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