void terminal_putchar(char c)
{
if ( c == '\n' )
{
terminal_column = 0;
if ( ++terminal_row == VGA_HEIGHT )
{
terminal_scroll();
terminal_row--;
}
move_csr();
return;
}
terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
if ( ++terminal_column == VGA_WIDTH )
{
terminal_column = 0;
if ( ++terminal_row == VGA_HEIGHT )
{
terminal_scroll();
terminal_row--;
}
}
move_csr();
}
// clear everything including scrollback
void cls(void) {
memsetw(&buffer, blank, BUFFER_SIZE);
clear_screen();
buf_csr = &buffer;
view_offset = &buffer;
move_csr();
}
/* Clears the screen */
void cls()
{
uint16_t blank;
int i;
/* Again, we need the 'short' that will be used to
* represent a space with color */
blank = 0x20 | (attrib << 8);
/* set background color of status line */
for (i=0; i < screen_w; i++)
*((uint8_t*)(textmemptr + i)+1) = attrib_status;
/* Sets the entire screen to spaces in our current
* color */
/* skip first line (used as status monitor) */
for(i = 1; i < screen_h; i++)
memsetw (textmemptr + i * screen_w, blank, screen_w);
/* Update out virtual cursor, and then move the
* hardware cursor */
csr_x = 0;
csr_y = 0;
# if !defined(EARLY) && SCROLLBACK_BUF_SIZE
buf_x = 0;
buf_y++;
if (buf_y > SCROLLBACK_BUF_SIZE) {
buf_y = 0;
printf("Scrollback overflow!\n");
}
# endif
move_csr();
}
void scr_scroll_up(void) {
if (view_offset > &buffer) {
view_offset -= SCR_WIDTH;
move_csr();
redraw();
}
}
void scr_scroll_down(void) {
if (view_offset + SCR_WIDTH < &buffer + BUFFER_SIZE) {
view_offset += SCR_WIDTH;
move_csr();
redraw();
}
}
void putch(char ch) {
size_t i;
int j;
unsigned att = attrib << 8;
unsigned short *eob;
unsigned short *eolwrite;
if (is_eob())
push_scrollback();
// do the backspace key later
// when we actually write a shell.
if (ch == KEY_BACKSPACE)
return;
if (ch == KEY_TAB) {
for (j = 0; j < TAB_SPACES; j++)
putch(' ');
} else if (ch == '\n') {
i = eol_distance();
//easiest implementation? just fill to end of line with spaces?
while (i > 0) {
putch(' '); //replace with memset later?
--i;
}
} else if (ch >= ' ') {
*buf_csr = ch | att;
buf_csr++;
move_csr();
redraw();
}
}
void putch(unsigned char c) {
unsigned short *loc;
unsigned att = attrib << 8;
if (c == 0x08) {
if (csr_x != 0)csr_x--;
} else if (c == 0x09) {
csr_x = (csr_x + 8) & ~(8 - 1);
} else if (c == '\r') {
csr_x = 0;
} else if (c == '\n') {
csr_x = 0;
csr_y++;
} else if (c >= ' ') {
loc = txtMemPtr + (csr_y * 80 + csr_x);
//*loc = att;
//*++loc = c;
*loc = c | att;
//*loc = c;
//*loc = att;
csr_x++;
}
if (csr_x >= 80) {
csr_x = 0;
csr_y++;
}
scroll();
move_csr();
}
/* Puts a single character on the screen */
void putch(const char c){
unsigned short *where;
unsigned att = attrib << 8;
/* Handle a backspace, by moving the cursor back one space */
if(c == 0x08)
{
if(csr_x != 0) {
csr_x--;
putch(' ');
csr_x--;
};
}
/* Handles a tab by incrementing the cursor's x, but only
* to a point that will make it divisible by 8 */
else if(c == 0x09)
{
csr_x = (csr_x + 8) & ~(8 - 1);
}
/* Handles a 'Carriage Return', which simply brings the
* cursor back to the margin */
else if(c == '\r')
{
csr_x = 0;
}
/* We handle our newlines the way DOS and the BIOS do: we
* treat it as if a 'CR' was also there, so we bring the
* cursor to the margin and we increment the 'y' value */
else if(c == '\n')
{
csr_x = 0;
csr_y++;
}
/* Any character greater than and including a space, is a
* printable character. The equation for finding the index
* in a linear chunk of memory can be represented by:
* Index = [(y * width) + x] */
else if(c >= ' ')
{
where = textmemptr + (csr_y * 80 + csr_x);
*where = c | att; /* Character AND attributes: color */
csr_x++;
}
/* If the cursor has reached the edge of the screen's width, we
* insert a new line in there */
if(csr_x >= 80)
{
csr_x = 0;
csr_y++;
}
/* Scroll the screen if needed, and finally move the cursor */
scroll();
move_csr();
}
void Printf(char *str)
{
WriteString(str, curserX, curserY);
curserX += strlen(str);
if(curserX > screenWidth)
{
curserY++;
curserX -= screenWidth;
}
move_csr();
}
void cls(void) {
unsigned blank;
int i;
blank = 0x20 | (attrib << 8);
for (i = 0; i < 25; i++)
memsetw(((unsigned short *) txtMemPtr) + i * 80, blank, 80);
csr_x = 0;
csr_y = 0;
move_csr();
}
void insert_char(char c, int pos) {
for (int i = com_len; i >= pos; i--) {
if (line[i-1] == ' ') line[i] = ' ';
else line[i] = line[i - 1];
}
line[pos] = c;
com_len++;
refresh_com();
csr_x++;
move_csr();
}
/* Coloca um caractere único na tela */
void putch(unsigned char c)
{
unsigned short *where;
unsigned att = attrib << 8;
/* Trata um backspace, recuando o cursor um espaço */
if(c == 0x08)
{
if(csr_x != 0) csr_x--;
}
/* Trata um tab incrementando o cursor x, mas somente
* para um ponto que seja divisível por 8 */
else if(c == 0x09)
{
csr_x = (csr_x + 8) & ~(8 - 1);
}
/* Trata um 'Retorno de Carruagem', que simplesmente traz o
* cursor novamente para a margem */
else if(c == '\r')
{
csr_x = 0;
}
/* Nós tratamos nossas novas linhas (newlines) do mesmo modo do DOS e BIOS fazem: nós
* trataremos isso como se um 'CR' estivesse lá também, assim nós trazemos o
* cursor para a margem e nós incrementamos o valor 'y' */
else if(c == '\n')
{
csr_x = 0;
csr_y++;
}
/* Qualquer caractere maior que e incluindo um espaço, é um
* caractere que pode ser impresso. A equação para achar o índice
* em um pedaço da memória linear pode ser representado por:
* Índice = [(y * largura) + x] */
else if(c >= ' ')
{
where = textmemptr + (csr_y * 80 + csr_x);
*where = c | att; /* Caractere E atributos: cor */
csr_x++;
}
/* Se o cursor alcançou a margem de largura da tela, nós
* inserimos uma nova linha lá */
if(csr_x >= 80)
{
csr_x = 0;
csr_y++;
}
/* Rola a tela se necessário, e finalmente move o cursor */
scroll();
move_csr();
}
void cls()
{
unsigned blank;
int i;
blank = 0x20 | (attrib << 8);
for(i = 0; i < ROWS/*25*/; i++)
memset16 (textmemptr + i * COLS, blank, COLS);
csr_x = 0;
csr_y = 0;
move_csr();
}
void cls()
{
unsigned blank;
int i;
blank = 0x20 | (attrib << 8);
for(i = 0; i < 25; i++)
memsetw (textmemptr + i * 80, blank, 80);
csr_x = 0;
csr_y = 0;
move_csr();
}
void alert(char s[], int line) {
clear_line(line);
int cur_y = csr_y;
int cur_x = csr_x;
csr_y = line;
csr_x = 0;
putch('|');
for (int i = 0; i < 70; i++) {
putch(s[i]);
}
putch('|');
csr_y = cur_y;
csr_x = cur_x;
move_csr();
}
void select_vc(unsigned which_vc)
{
unsigned i;
if(which_vc >= _num_vcs)
return;
_curr_vc = _vc + which_vc;
i = _curr_vc->fb_adr - _vga_fb_adr;
outportb(_crtc_io_adr + 0, 12);
outportb(_crtc_io_adr + 1, i >> 8);
outportb(_crtc_io_adr + 0, 13);
outportb(_crtc_io_adr + 1, i);
/* oops, forgot this: */
move_csr();
}
void cls()
/// Clear The screen
{
unsigned blank;
int i;
blank = 0x20 | (attrib << 8); // Make the "blank" (space + attribute)
for(i = 0; i < 25; i++) // Do it on every Line of the screen
memsetw (textmemptr + i * 80, blank, 80); // Clear a line on the screen
csr_x = 0; // Set Cursor Coords
csr_y = 0;
move_csr(); // Push the change to the VGA controller
}
void cls(){
unsigned blank;
int i;
blank = 0x20 | (attrib << 8); //Blank character with black background
// Clear entire screen
for(i = 0; i < 25; i++)
memsetw (textmemptr + i * 80, blank, 80);
/* Update out virtual cursor, and then move the
* hardware cursor */
csr_x = 0;
csr_y = 0;
move_csr();
}
void terminal_initialize()
{
uint16_t vga_entry;
terminal_row = 0;
terminal_column = 0;
move_csr();
terminal_color = make_color(COLOR_WHITE, COLOR_BLACK);
terminal_buffer = (uint16_t *) VGA_BUFFER;
vga_entry = make_vgaentry(FILLCHAR, terminal_color);
memset16(terminal_buffer, vga_entry, VGA_WIDTH * VGA_HEIGHT);
VGA_BUFFER_SIZE = VGA_WIDTH * VGA_HEIGHT;
}
void refresh_com() {
int cur_y = csr_y;
int cur_x = csr_x;
for (int i = start_line; i <= csr_y; i++) {
clear_line(i);
}
csr_y = start_line;
csr_x = 0;
wait_com();
for (int i = 0; i < com_len; i++) {
putch(line[i]);
}
csr_y = cur_y;
csr_x = cur_x;
move_csr();
}
void putch(char c)
/// Output a single charecter to the screen
{
unsigned short *where;
unsigned att = attrib << 8;
if(c == 0x08) // Handle a Backspace as a control charecter
{
if(csr_x != 0) {
csr_x--; // Move it back one space
where = textmemptr + (csr_y * 80 + csr_x); // Find where we are
*where = ' ' | att; // Make it blank.
}
}
else if(c == 0x09) // Handle a Tab
{
csr_x = (csr_x + 8) & ~(8 - 1); // Move the cursor forward modulus 8
}
else if(c == '\r') // Carriage return
{
csr_x = 0; // Return the cursor to the beginning of the screen
}
else if(c == '\n') // Newline!
{
csr_x = 0; // Carriage return is included in the newline
csr_y++; // Next line on the screen
}
else if(c >= ' ') // Any ASCII non-Controll code:
{
where = textmemptr + (csr_y * 80 + csr_x);
*where = c | att; // Character AND attributes: color
csr_x++;
}
if(csr_x >= 80) // Check to see if we overflowed into next line
{
csr_x = 0; // Adjust the line appropriately
csr_y++; // Increment line pointer
}
scroll(); // Check to see if we need to scroll the screen
move_csr(); // Move the cursor to it's new home.
}
/* Clears the screen */
void cls() {
unsigned blank;
int i;
/* Again, we need the 'short' that will be used to
* represent a space with color */
blank = 0x20 | (attrib << 8);
/* Sets the entire screen to spaces in our current
* color */
for(i = 0; i < 25; i++)
memsetw (textmemptr + i * 80, blank, 80);
/* Update out virtual cursor, and then move the
* hardware cursor */
csr_x = 0;
csr_y = 0;
move_csr();
}
void putch(unsigned c)
{
unsigned att;
att = _attrib << 8;
/* backspace */
if(c == 0x08)
{
if(_csr_x != 0)
_csr_x--;
}
/* tab */
else if(c == 0x09)
_csr_x = (_csr_x + 8) & ~(8 - 1);
/* carriage return */
else if(c == '\r') /* 0x0D */
_csr_x = 0;
/* line feed */
// else if(c == '\n') /* 0x0A */
// _csr_y++;
/* CR/LF */
else if(c == '\n') /* ### - 0x0A again */
{
_csr_x = 0;
_csr_y++;
}
/* printable ASCII */
else if(c >= ' ')
{
unsigned short *where;
where = _vga_fb_adr + (_csr_y * _vc_width + _csr_x);
*where = c | att;
_csr_x++;
}
if(_csr_x >= _vc_width)
{
_csr_x = 0;
_csr_y++;
}
scroll();
move_csr();
}
/* Limpa a tela */
void cls()
{
unsigned blank;
int i;
/* Outra vez, nós necessitamos o 'short' que vai ser usada para
* representar um espaço com cor */
blank = 0x20 | (attrib << 8);
/* Atribui a tela inteira com espaços para nossa cor
* corrente */
for(i = 0; i < 25; i++)
memsetw (textmemptr + i * 80, blank, 80);
/* Atualiza o cursor virtual, e então move o
* cursor do hardware */
csr_x = 0;
csr_y = 0;
move_csr();
}
void putch(unsigned char c)
{
unsigned short *where;
unsigned att = attrib << 8;
if(c == 0x08)
{
if(csr_x != 0) csr_x--;
}
else if(c == 0x09)
{
csr_x = (csr_x + 8) & ~(8 - 1);
}
else if(c == '\r')
{
csr_x = 0;
}
else if(c == '\n')
{
csr_x = 0;
csr_y++;
}
else if(c >= ' ')
{
where = textmemptr + (csr_y * 80 + csr_x);
*where = c | att;
csr_x++;
}
if(csr_x >= 80)
{
csr_x = 0;
csr_y++;
}
scroll();
move_csr();
}
void putch(unsigned char c)
{
unsigned short *where;
unsigned att = attrib << 8;
if(c == 0x08)
{
if(csr_x != 0) csr_x--;
}
else if(c == 0x09)
{
csr_x = (csr_x + 8) & ~(8 - 1);
}
else if(c == '\r')
{
csr_x = 0;
}
else if(c == '\n')
{
csr_x = 0;
csr_y++;
}
else if(c >= ' ')
{
where = textmemptr + (csr_y * COLS + csr_x);
*where = c | att; /* Character AND attributes: color */
csr_x++;
}
if(csr_x >= COLS)
{
csr_x = 0;
csr_y++;
}
scroll();
move_csr();
}
/// NOTE: What purpose does this function serve?
void shell_csr_fix()
/// Fix the cursor back a line.
{
csr_y--; // Move cursor back a line
move_csr(); // Tell the hardware to move it
}
static void putch_help(console_t *con, unsigned c)
{
unsigned short *fb_adr;
unsigned att;
att = (unsigned)con->attrib << 8;
fb_adr = con->fb_adr;
/* state machine to handle the escape sequences
ESC */
if(con->esc == 1)
{
if(c == '[')
{
con->esc++;
con->esc1 = 0;
return;
}
/* else fall-through: zero esc and print c */
}
/* ESC[ */
else if(con->esc == 2)
{
if(isdigit(c))
{
con->esc1 = con->esc1 * 10 + c - '0';
return;
}
else if(c == ';')
{
con->esc++;
con->esc2 = 0;
return;
}
/* ESC[2J -- clear screen */
else if(c == 'J')
{
if(con->esc1 == 2)
{
memsetw(fb_adr, ' ' | att,
_vc_height * _vc_width);
con->csr_x = con->csr_y = 0;
}
}
/* ESC[num1m -- set attribute num1 */
else if(c == 'm')
set_attrib(con, con->esc1);
con->esc = 0; /* anything else with one numeric arg */
return;
}
/* ESC[num1; */
else if(con->esc == 3)
{
if(isdigit(c))
{
con->esc2 = con->esc2 * 10 + c - '0';
return;
}
else if(c == ';')
{
con->esc++; /* ESC[num1;num2; */
con->esc3 = 0;
return;
}
/* ESC[num1;num2H -- move cursor to num1,num2 */
else if(c == 'H')
{
if(con->esc2 < _vc_width)
con->csr_x = con->esc2;
if(con->esc1 < _vc_height)
con->csr_y = con->esc1;
}
/* ESC[num1;num2m -- set attributes num1,num2 */
else if(c == 'm')
{
set_attrib(con, con->esc1);
set_attrib(con, con->esc2);
}
con->esc = 0;
return;
}
/* ESC[num1;num2;num3 */
else if(con->esc == 4)
{
if(isdigit(c))
{
con->esc3 = con->esc3 * 10 + c - '0';
return;
}
/* ESC[num1;num2;num3m -- set attributes num1,num2,num3 */
else if(c == 'm')
{
set_attrib(con, con->esc1);
set_attrib(con, con->esc2);
set_attrib(con, con->esc3);
}
con->esc = 0;
return;
}
con->esc = 0;
/* escape character */
if(c == 0x1B)
{
con->esc = 1;
return;
}
/* backspace */
if(c == 0x08)
{
if(con->csr_x != 0)
con->csr_x--;
}
/* tab */
else if(c == 0x09)
con->csr_x = (con->csr_x + 8) & ~(8 - 1);
/* carriage return */
else if(c == '\r') /* 0x0D */
con->csr_x = 0;
/* line feed */
// else if(c == '\n') /* 0x0A */
// con->csr_y++;
/* CR/LF */
else if(c == '\n') /* ### - 0x0A again */
{
con->csr_x = 0;
con->csr_y++;
}
/* printable ASCII */
else if(c >= ' ')
{
unsigned short *where;
where = fb_adr + (con->csr_y * _vc_width + con->csr_x);
*where = (c | att);
con->csr_x++;
}
if(con->csr_x >= _vc_width)
{
con->csr_x = 0;
con->csr_y++;
}
scroll(con);
/* move cursor only if the VC we're writing is the current VC */
if(_curr_vc == con)
move_csr();
}