/*
* Copyright (c) 2012 Sandeep Kumar
* Copyright (c) 2012 Vojtech Horky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @addtogroup kernel_generic_console
* @{
*/
/**
* @file
* @brief Kernel console special prompts.
*/
#include <assert.h>
#include <console/prompt.h>
/** Display the <i>display all possibilities</i> prompt and wait for answer.
*
* @param indev Where to read characters from.
* @param hints Number of hints that would be displayed.
*
* @return Whether to print all hints.
*
*/
bool console_prompt_display_all_hints(indev_t *indev, size_t hints)
{
assert(indev);
assert(hints > 0);
printf("Display all %zu possibilities? (y or n) ", hints);
while (true) {
char32_t answer = indev_pop_character(indev);
if ((answer == 'y') || (answer == 'Y')) {
printf("y");
return true;
}
if ((answer == 'n') || (answer == 'N')) {
printf("n");
return false;
}
}
}
/** Display the <i>--more--</i> prompt and wait for answer.
*
* When the function returns false, @p display_hints is set to zero.
*
* @param[in] indev Where to read characters from.
* @param[out] display_hints How many hints to display.
*
* @return Whether to display more hints.
*
*/
bool console_prompt_more_hints(indev_t *indev, size_t *display_hints)
{
assert(indev);
assert(display_hints != NULL);
printf("--More--");
while (true) {
char32_t continue_showing_hints = indev_pop_character(indev);
/* Display a full page again? */
if ((continue_showing_hints == 'y') ||
(continue_showing_hints == 'Y') ||
(continue_showing_hints == ' ')) {
*display_hints = MAX_TAB_HINTS - 1;
break;
}
/* Stop displaying hints? */
if ((continue_showing_hints == 'n') ||
(continue_showing_hints == 'N') ||
(continue_showing_hints == 'q') ||
(continue_showing_hints == 'Q')) {
*display_hints = 0;
break;
}
/* Show one more hint? */
if (continue_showing_hints == '\n') {
*display_hints = 1;
break;
}
}
/* Delete the --More-- option */
printf("\r \r");
return *display_hints > 0;
}
/** @}
*/