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idiolatrie |
/******************************************************************************
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* Standard Input/Output *
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******************************************************************************
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* Copyright (C)2011 Mathias Hörtnagl <mathias.hoertnagl@gmail.com> *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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******************************************************************************/
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#include "stddef.h"
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#ifndef _STDIO_H
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#define _STDIO_H
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/******************************************************************************
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* VGA *
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******************************************************************************/
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/* Pointer to VGA display memory. */
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#define VGA_MEMORY ( (volatile ushort *) 0xffff0000 )
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/* Maximum values of the display's horizontal and vertical coordinates. */
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#define VGA_H 100
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#define VGA_V 37
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/* Calculates the position of the cursor from its x and y coordinates that is
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actually 10*y + x, substituting a multiplication with left shifts and
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additions. */
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#define VGA_POS(x,y) ( (y << 6) + (y << 5) + (y << 2) + x )
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/* Set up character information of type 0fff0bbb cccccccc where f and b are the
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3-bit foreground and background colors respectively. c denotes the 8-bit
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character.
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NOTE: Does not check for 3 bit color and 8 bit character limits. */
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#define VGA_CHR(f,b,c) ( (f << 12) | (b << 8) | c )
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/* Available colors on an 8 color VGA display. */
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#define BLACK ((uchar) 0)
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#define BLUE ((uchar) 1)
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#define GREEN ((uchar) 2)
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#define CYAN ((uchar) 3)
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#define RED ((uchar) 4)
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#define MAGENTA ((uchar) 5)
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#define YELLOW ((uchar) 6)
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#define WHITE ((uchar) 7)
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/******************************************************************************
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* Keyboard *
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******************************************************************************/
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/* Pointer to Keyboard character memory. */
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#define KEYB_MEMORY ((volatile uint *) 0xffff3000)
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/* Input buffer size */
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#define INBUF_SIZE 128
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/* Funtional key flags. */
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#define KEYB_SHIFT ((uchar) 0x80)
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#define KEYB_CTRL ((uchar) 0x40)
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#define KEYB_ALT ((uchar) 0x20)
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#define KEYB_ALTGR ((uchar) 0x10)
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/* Special keys. */
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#define KEY_ENTER ((uchar) 0x0d)
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#define KEY_BACKSP ((uchar) 0x08)
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#define KEY_TAB ((uchar) 0x09)
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#define KEY_ESC ((uchar) 0x1b)
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#define KEY_DEL ((uchar) 0x7f)
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#define KEY_SCROLL ((uchar) 0x80)
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#define KEY_ARROWU ((uchar) 0xf0)
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#define KEY_ARROWL ((uchar) 0xf1)
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#define KEY_ARROWD ((uchar) 0xf2)
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#define KEY_ARROWR ((uchar) 0xf3)
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/******************************************************************************
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* Type Definitions *
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******************************************************************************/
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/* Color information structure. */
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typedef struct _color {
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uchar fg;
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uchar bg;
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} color;
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/* Cursor position structure. */
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typedef struct _cursor {
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uchar x;
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uchar y;
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} cursor;
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/* Key */
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typedef struct _key {
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uchar flags;
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uchar chr;
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} key;
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/******************************************************************************
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* Output Functions *
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******************************************************************************/
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/* Set text and background colors. */
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extern void setcolor(uchar fg, uchar bg);
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/* Set cursor at position x,y. */
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extern void gotoxy(uchar x, uchar y);
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/* Clears the entire display and resets the cursor. */
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extern void cls();
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/* Scrolls down one line and clears the lowest line. The vertical cursor jumps
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one line up, if not already on line one. If the cursor is on the first line
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the horizontal cursor is reset to zero. */
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extern void scroll();
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/* Outputs a single character onto the screen. */
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extern void putc(const uchar chr);
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/* Print a string without it's trailing '\0' onto the screen. */
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extern void puts(const uchar *str);
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/* Formatted string printig. The following parameters are available:
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+----+--------------------------------------------------+
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| %s | print a string |
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| %c | print a single character |
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| %x | print a hexadecimal representation of an integer |
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| %b | print a binary representation of an intger |
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| %% | print a '%' |
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+----+--------------------------------------------------+
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+----+----------------+
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| \n | line break |
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| \r | carrage return |
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| \t | tab space |
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| \b | back space |
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| \\ | print a '\' |
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+----+----------------+
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Despite the standard printf implementation, you can manipulate the background
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and text colors:
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+----+---------+----+---------+----+---------+----+---------+
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| $k | black | $b | blue | $g | green | $c | cyan |
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| $r | red | $m | magenta | $y | yellow | $w | white |
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+----+---------+----+---------+----+---------+----+---------+
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$$ - print a '$'
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The background colors can be specified the same way with a '#' as a format
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indicator. Besides the format string, the function takes only one value
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argunment. */
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extern void printf(const uchar *format, void *arg);
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#define printf0(f) printf(f, NULL);
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/******************************************************************************
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* Input Functions *
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******************************************************************************/
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/* Polls for a singe character. The keyboard controller only sends make codes
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and postpones the read ack until a key is pressed. */
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extern key* getc();
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/* Returns a string of at most INBUF_SIZE characters (without '\0'). The user
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can confirm the input with the enter button. */
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extern uchar* gets();
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#endif
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