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console.c
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/*
* QEMU graphical console
*
* Copyright (c) 2004 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "ui/console.h"
#include "hw/qdev-core.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-ui.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qemu/timer.h"
#include "chardev/char-fe.h"
#include "trace.h"
#include "exec/memory.h"
#include "io/channel-file.h"
#include "qom/object.h"
#define DEFAULT_BACKSCROLL 512
#define CONSOLE_CURSOR_PERIOD 500
typedef struct TextAttributes {
uint8_t fgcol:4;
uint8_t bgcol:4;
uint8_t bold:1;
uint8_t uline:1;
uint8_t blink:1;
uint8_t invers:1;
uint8_t unvisible:1;
} TextAttributes;
typedef struct TextCell {
uint8_t ch;
TextAttributes t_attrib;
} TextCell;
#define MAX_ESC_PARAMS 3
enum TTYState {
TTY_STATE_NORM,
TTY_STATE_ESC,
TTY_STATE_CSI,
};
typedef struct QEMUFIFO {
uint8_t *buf;
int buf_size;
int count, wptr, rptr;
} QEMUFIFO;
static int qemu_fifo_write(QEMUFIFO *f, const uint8_t *buf, int len1)
{
int l, len;
l = f->buf_size - f->count;
if (len1 > l)
len1 = l;
len = len1;
while (len > 0) {
l = f->buf_size - f->wptr;
if (l > len)
l = len;
memcpy(f->buf + f->wptr, buf, l);
f->wptr += l;
if (f->wptr >= f->buf_size)
f->wptr = 0;
buf += l;
len -= l;
}
f->count += len1;
return len1;
}
static int qemu_fifo_read(QEMUFIFO *f, uint8_t *buf, int len1)
{
int l, len;
if (len1 > f->count)
len1 = f->count;
len = len1;
while (len > 0) {
l = f->buf_size - f->rptr;
if (l > len)
l = len;
memcpy(buf, f->buf + f->rptr, l);
f->rptr += l;
if (f->rptr >= f->buf_size)
f->rptr = 0;
buf += l;
len -= l;
}
f->count -= len1;
return len1;
}
typedef enum {
GRAPHIC_CONSOLE,
TEXT_CONSOLE,
TEXT_CONSOLE_FIXED_SIZE
} console_type_t;
struct QemuConsole {
Object parent;
int index;
console_type_t console_type;
DisplayState *ds;
DisplaySurface *surface;
int dcls;
DisplayChangeListener *gl;
bool gl_block;
int window_id;
/* Graphic console state. */
Object *device;
uint32_t head;
QemuUIInfo ui_info;
QEMUTimer *ui_timer;
const GraphicHwOps *hw_ops;
void *hw;
/* Text console state */
int width;
int height;
int total_height;
int backscroll_height;
int x, y;
int x_saved, y_saved;
int y_displayed;
int y_base;
TextAttributes t_attrib_default; /* default text attributes */
TextAttributes t_attrib; /* currently active text attributes */
TextCell *cells;
int text_x[2], text_y[2], cursor_invalidate;
int echo;
int update_x0;
int update_y0;
int update_x1;
int update_y1;
enum TTYState state;
int esc_params[MAX_ESC_PARAMS];
int nb_esc_params;
Chardev *chr;
/* fifo for key pressed */
QEMUFIFO out_fifo;
uint8_t out_fifo_buf[16];
QEMUTimer *kbd_timer;
CoQueue dump_queue;
QTAILQ_ENTRY(QemuConsole) next;
};
struct DisplayState {
QEMUTimer *gui_timer;
uint64_t last_update;
uint64_t update_interval;
bool refreshing;
bool have_gfx;
bool have_text;
QLIST_HEAD(, DisplayChangeListener) listeners;
};
static DisplayState *display_state;
static QemuConsole *active_console;
static QTAILQ_HEAD(, QemuConsole) consoles =
QTAILQ_HEAD_INITIALIZER(consoles);
static bool cursor_visible_phase;
static QEMUTimer *cursor_timer;
static void text_console_do_init(Chardev *chr, DisplayState *ds);
static void dpy_refresh(DisplayState *s);
static DisplayState *get_alloc_displaystate(void);
static void text_console_update_cursor_timer(void);
static void text_console_update_cursor(void *opaque);
static void gui_update(void *opaque)
{
uint64_t interval = GUI_REFRESH_INTERVAL_IDLE;
uint64_t dcl_interval;
DisplayState *ds = opaque;
DisplayChangeListener *dcl;
QemuConsole *con;
ds->refreshing = true;
dpy_refresh(ds);
ds->refreshing = false;
QLIST_FOREACH(dcl, &ds->listeners, next) {
dcl_interval = dcl->update_interval ?
dcl->update_interval : GUI_REFRESH_INTERVAL_DEFAULT;
if (interval > dcl_interval) {
interval = dcl_interval;
}
}
if (ds->update_interval != interval) {
ds->update_interval = interval;
QTAILQ_FOREACH(con, &consoles, next) {
if (con->hw_ops->update_interval) {
con->hw_ops->update_interval(con->hw, interval);
}
}
trace_console_refresh(interval);
}
ds->last_update = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
timer_mod(ds->gui_timer, ds->last_update + interval);
}
static void gui_setup_refresh(DisplayState *ds)
{
DisplayChangeListener *dcl;
bool need_timer = false;
bool have_gfx = false;
bool have_text = false;
QLIST_FOREACH(dcl, &ds->listeners, next) {
if (dcl->ops->dpy_refresh != NULL) {
need_timer = true;
}
if (dcl->ops->dpy_gfx_update != NULL) {
have_gfx = true;
}
if (dcl->ops->dpy_text_update != NULL) {
have_text = true;
}
}
if (need_timer && ds->gui_timer == NULL) {
ds->gui_timer = timer_new_ms(QEMU_CLOCK_REALTIME, gui_update, ds);
timer_mod(ds->gui_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME));
}
if (!need_timer && ds->gui_timer != NULL) {
timer_del(ds->gui_timer);
timer_free(ds->gui_timer);
ds->gui_timer = NULL;
}
ds->have_gfx = have_gfx;
ds->have_text = have_text;
}
void graphic_hw_update_done(QemuConsole *con)
{
if (con) {
qemu_co_queue_restart_all(&con->dump_queue);
}
}
void graphic_hw_update(QemuConsole *con)
{
bool async = false;
con = con ? con : active_console;
if (!con) {
return;
}
if (con->hw_ops->gfx_update) {
con->hw_ops->gfx_update(con->hw);
async = con->hw_ops->gfx_update_async;
}
if (!async) {
graphic_hw_update_done(con);
}
}
void graphic_hw_gl_block(QemuConsole *con, bool block)
{
assert(con != NULL);
con->gl_block = block;
if (con->hw_ops->gl_block) {
con->hw_ops->gl_block(con->hw, block);
}
}
int qemu_console_get_window_id(QemuConsole *con)
{
return con->window_id;
}
void qemu_console_set_window_id(QemuConsole *con, int window_id)
{
con->window_id = window_id;
}
void graphic_hw_invalidate(QemuConsole *con)
{
if (!con) {
con = active_console;
}
if (con && con->hw_ops->invalidate) {
con->hw_ops->invalidate(con->hw);
}
}
static bool ppm_save(int fd, pixman_image_t *image, Error **errp)
{
int width = pixman_image_get_width(image);
int height = pixman_image_get_height(image);
g_autoptr(Object) ioc = OBJECT(qio_channel_file_new_fd(fd));
g_autofree char *header = NULL;
g_autoptr(pixman_image_t) linebuf = NULL;
int y;
trace_ppm_save(fd, image);
header = g_strdup_printf("P6\n%d %d\n%d\n", width, height, 255);
if (qio_channel_write_all(QIO_CHANNEL(ioc),
header, strlen(header), errp) < 0) {
return false;
}
linebuf = qemu_pixman_linebuf_create(PIXMAN_BE_r8g8b8, width);
for (y = 0; y < height; y++) {
qemu_pixman_linebuf_fill(linebuf, image, width, 0, y);
if (qio_channel_write_all(QIO_CHANNEL(ioc),
(char *)pixman_image_get_data(linebuf),
pixman_image_get_stride(linebuf), errp) < 0) {
return false;
}
}
return true;
}
static void graphic_hw_update_bh(void *con)
{
graphic_hw_update(con);
}
/* Safety: coroutine-only, concurrent-coroutine safe, main thread only */
void coroutine_fn
qmp_screendump(const char *filename, bool has_device, const char *device,
bool has_head, int64_t head, Error **errp)
{
g_autoptr(pixman_image_t) image = NULL;
QemuConsole *con;
DisplaySurface *surface;
int fd;
if (has_device) {
con = qemu_console_lookup_by_device_name(device, has_head ? head : 0,
errp);
if (!con) {
return;
}
} else {
if (has_head) {
error_setg(errp, "'head' must be specified together with 'device'");
return;
}
con = qemu_console_lookup_by_index(0);
if (!con) {
error_setg(errp, "There is no console to take a screendump from");
return;
}
}
if (qemu_co_queue_empty(&con->dump_queue)) {
/* Defer the update, it will restart the pending coroutines */
aio_bh_schedule_oneshot(qemu_get_aio_context(),
graphic_hw_update_bh, con);
}
qemu_co_queue_wait(&con->dump_queue, NULL);
/*
* All pending coroutines are woken up, while the BQL is held. No
* further graphic update are possible until it is released. Take
* an image ref before that.
*/
surface = qemu_console_surface(con);
if (!surface) {
error_setg(errp, "no surface");
return;
}
image = pixman_image_ref(surface->image);
fd = qemu_open_old(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
if (fd == -1) {
error_setg(errp, "failed to open file '%s': %s", filename,
strerror(errno));
return;
}
/*
* The image content could potentially be updated as the coroutine
* yields and releases the BQL. It could produce corrupted dump, but
* it should be otherwise safe.
*/
if (!ppm_save(fd, image, errp)) {
qemu_unlink(filename);
}
}
void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata)
{
if (!con) {
con = active_console;
}
if (con && con->hw_ops->text_update) {
con->hw_ops->text_update(con->hw, chardata);
}
}
static void vga_fill_rect(QemuConsole *con,
int posx, int posy, int width, int height,
pixman_color_t color)
{
DisplaySurface *surface = qemu_console_surface(con);
pixman_rectangle16_t rect = {
.x = posx, .y = posy, .width = width, .height = height
};
pixman_image_fill_rectangles(PIXMAN_OP_SRC, surface->image,
&color, 1, &rect);
}
/* copy from (xs, ys) to (xd, yd) a rectangle of size (w, h) */
static void vga_bitblt(QemuConsole *con,
int xs, int ys, int xd, int yd, int w, int h)
{
DisplaySurface *surface = qemu_console_surface(con);
pixman_image_composite(PIXMAN_OP_SRC,
surface->image, NULL, surface->image,
xs, ys, 0, 0, xd, yd, w, h);
}
/***********************************************************/
/* basic char display */
#define FONT_HEIGHT 16
#define FONT_WIDTH 8
#include "vgafont.h"
#define QEMU_RGB(r, g, b) \
{ .red = r << 8, .green = g << 8, .blue = b << 8, .alpha = 0xffff }
static const pixman_color_t color_table_rgb[2][8] = {
{ /* dark */
[QEMU_COLOR_BLACK] = QEMU_RGB(0x00, 0x00, 0x00), /* black */
[QEMU_COLOR_BLUE] = QEMU_RGB(0x00, 0x00, 0xaa), /* blue */
[QEMU_COLOR_GREEN] = QEMU_RGB(0x00, 0xaa, 0x00), /* green */
[QEMU_COLOR_CYAN] = QEMU_RGB(0x00, 0xaa, 0xaa), /* cyan */
[QEMU_COLOR_RED] = QEMU_RGB(0xaa, 0x00, 0x00), /* red */
[QEMU_COLOR_MAGENTA] = QEMU_RGB(0xaa, 0x00, 0xaa), /* magenta */
[QEMU_COLOR_YELLOW] = QEMU_RGB(0xaa, 0xaa, 0x00), /* yellow */
[QEMU_COLOR_WHITE] = QEMU_RGB(0xaa, 0xaa, 0xaa), /* white */
},
{ /* bright */
[QEMU_COLOR_BLACK] = QEMU_RGB(0x00, 0x00, 0x00), /* black */
[QEMU_COLOR_BLUE] = QEMU_RGB(0x00, 0x00, 0xff), /* blue */
[QEMU_COLOR_GREEN] = QEMU_RGB(0x00, 0xff, 0x00), /* green */
[QEMU_COLOR_CYAN] = QEMU_RGB(0x00, 0xff, 0xff), /* cyan */
[QEMU_COLOR_RED] = QEMU_RGB(0xff, 0x00, 0x00), /* red */
[QEMU_COLOR_MAGENTA] = QEMU_RGB(0xff, 0x00, 0xff), /* magenta */
[QEMU_COLOR_YELLOW] = QEMU_RGB(0xff, 0xff, 0x00), /* yellow */
[QEMU_COLOR_WHITE] = QEMU_RGB(0xff, 0xff, 0xff), /* white */
}
};
static void vga_putcharxy(QemuConsole *s, int x, int y, int ch,
TextAttributes *t_attrib)
{
static pixman_image_t *glyphs[256];
DisplaySurface *surface = qemu_console_surface(s);
pixman_color_t fgcol, bgcol;
if (t_attrib->invers) {
bgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
fgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
} else {
fgcol = color_table_rgb[t_attrib->bold][t_attrib->fgcol];
bgcol = color_table_rgb[t_attrib->bold][t_attrib->bgcol];
}
if (!glyphs[ch]) {
glyphs[ch] = qemu_pixman_glyph_from_vgafont(FONT_HEIGHT, vgafont16, ch);
}
qemu_pixman_glyph_render(glyphs[ch], surface->image,
&fgcol, &bgcol, x, y, FONT_WIDTH, FONT_HEIGHT);
}
static void text_console_resize(QemuConsole *s)
{
TextCell *cells, *c, *c1;
int w1, x, y, last_width;
last_width = s->width;
s->width = surface_width(s->surface) / FONT_WIDTH;
s->height = surface_height(s->surface) / FONT_HEIGHT;
w1 = last_width;
if (s->width < w1)
w1 = s->width;
cells = g_new(TextCell, s->width * s->total_height + 1);
for(y = 0; y < s->total_height; y++) {
c = &cells[y * s->width];
if (w1 > 0) {
c1 = &s->cells[y * last_width];
for(x = 0; x < w1; x++) {
*c++ = *c1++;
}
}
for(x = w1; x < s->width; x++) {
c->ch = ' ';
c->t_attrib = s->t_attrib_default;
c++;
}
}
g_free(s->cells);
s->cells = cells;
}
static inline void text_update_xy(QemuConsole *s, int x, int y)
{
s->text_x[0] = MIN(s->text_x[0], x);
s->text_x[1] = MAX(s->text_x[1], x);
s->text_y[0] = MIN(s->text_y[0], y);
s->text_y[1] = MAX(s->text_y[1], y);
}
static void invalidate_xy(QemuConsole *s, int x, int y)
{
if (!qemu_console_is_visible(s)) {
return;
}
if (s->update_x0 > x * FONT_WIDTH)
s->update_x0 = x * FONT_WIDTH;
if (s->update_y0 > y * FONT_HEIGHT)
s->update_y0 = y * FONT_HEIGHT;
if (s->update_x1 < (x + 1) * FONT_WIDTH)
s->update_x1 = (x + 1) * FONT_WIDTH;
if (s->update_y1 < (y + 1) * FONT_HEIGHT)
s->update_y1 = (y + 1) * FONT_HEIGHT;
}
static void update_xy(QemuConsole *s, int x, int y)
{
TextCell *c;
int y1, y2;
if (s->ds->have_text) {
text_update_xy(s, x, y);
}
y1 = (s->y_base + y) % s->total_height;
y2 = y1 - s->y_displayed;
if (y2 < 0) {
y2 += s->total_height;
}
if (y2 < s->height) {
if (x >= s->width) {
x = s->width - 1;
}
c = &s->cells[y1 * s->width + x];
vga_putcharxy(s, x, y2, c->ch,
&(c->t_attrib));
invalidate_xy(s, x, y2);
}
}
static void console_show_cursor(QemuConsole *s, int show)
{
TextCell *c;
int y, y1;
int x = s->x;
if (s->ds->have_text) {
s->cursor_invalidate = 1;
}
if (x >= s->width) {
x = s->width - 1;
}
y1 = (s->y_base + s->y) % s->total_height;
y = y1 - s->y_displayed;
if (y < 0) {
y += s->total_height;
}
if (y < s->height) {
c = &s->cells[y1 * s->width + x];
if (show && cursor_visible_phase) {
TextAttributes t_attrib = s->t_attrib_default;
t_attrib.invers = !(t_attrib.invers); /* invert fg and bg */
vga_putcharxy(s, x, y, c->ch, &t_attrib);
} else {
vga_putcharxy(s, x, y, c->ch, &(c->t_attrib));
}
invalidate_xy(s, x, y);
}
}
static void console_refresh(QemuConsole *s)
{
DisplaySurface *surface = qemu_console_surface(s);
TextCell *c;
int x, y, y1;
if (s->ds->have_text) {
s->text_x[0] = 0;
s->text_y[0] = 0;
s->text_x[1] = s->width - 1;
s->text_y[1] = s->height - 1;
s->cursor_invalidate = 1;
}
vga_fill_rect(s, 0, 0, surface_width(surface), surface_height(surface),
color_table_rgb[0][QEMU_COLOR_BLACK]);
y1 = s->y_displayed;
for (y = 0; y < s->height; y++) {
c = s->cells + y1 * s->width;
for (x = 0; x < s->width; x++) {
vga_putcharxy(s, x, y, c->ch,
&(c->t_attrib));
c++;
}
if (++y1 == s->total_height) {
y1 = 0;
}
}
console_show_cursor(s, 1);
dpy_gfx_update(s, 0, 0,
surface_width(surface), surface_height(surface));
}
static void console_scroll(QemuConsole *s, int ydelta)
{
int i, y1;
if (ydelta > 0) {
for(i = 0; i < ydelta; i++) {
if (s->y_displayed == s->y_base)
break;
if (++s->y_displayed == s->total_height)
s->y_displayed = 0;
}
} else {
ydelta = -ydelta;
i = s->backscroll_height;
if (i > s->total_height - s->height)
i = s->total_height - s->height;
y1 = s->y_base - i;
if (y1 < 0)
y1 += s->total_height;
for(i = 0; i < ydelta; i++) {
if (s->y_displayed == y1)
break;
if (--s->y_displayed < 0)
s->y_displayed = s->total_height - 1;
}
}
console_refresh(s);
}
static void console_put_lf(QemuConsole *s)
{
TextCell *c;
int x, y1;
s->y++;
if (s->y >= s->height) {
s->y = s->height - 1;
if (s->y_displayed == s->y_base) {
if (++s->y_displayed == s->total_height)
s->y_displayed = 0;
}
if (++s->y_base == s->total_height)
s->y_base = 0;
if (s->backscroll_height < s->total_height)
s->backscroll_height++;
y1 = (s->y_base + s->height - 1) % s->total_height;
c = &s->cells[y1 * s->width];
for(x = 0; x < s->width; x++) {
c->ch = ' ';
c->t_attrib = s->t_attrib_default;
c++;
}
if (s->y_displayed == s->y_base) {
if (s->ds->have_text) {
s->text_x[0] = 0;
s->text_y[0] = 0;
s->text_x[1] = s->width - 1;
s->text_y[1] = s->height - 1;
}
vga_bitblt(s, 0, FONT_HEIGHT, 0, 0,
s->width * FONT_WIDTH,
(s->height - 1) * FONT_HEIGHT);
vga_fill_rect(s, 0, (s->height - 1) * FONT_HEIGHT,
s->width * FONT_WIDTH, FONT_HEIGHT,
color_table_rgb[0][s->t_attrib_default.bgcol]);
s->update_x0 = 0;
s->update_y0 = 0;
s->update_x1 = s->width * FONT_WIDTH;
s->update_y1 = s->height * FONT_HEIGHT;
}
}
}
/* Set console attributes depending on the current escape codes.
* NOTE: I know this code is not very efficient (checking every color for it
* self) but it is more readable and better maintainable.
*/
static void console_handle_escape(QemuConsole *s)
{
int i;
for (i=0; i<s->nb_esc_params; i++) {
switch (s->esc_params[i]) {
case 0: /* reset all console attributes to default */
s->t_attrib = s->t_attrib_default;
break;
case 1:
s->t_attrib.bold = 1;
break;
case 4:
s->t_attrib.uline = 1;
break;
case 5:
s->t_attrib.blink = 1;
break;
case 7:
s->t_attrib.invers = 1;
break;
case 8:
s->t_attrib.unvisible = 1;
break;
case 22:
s->t_attrib.bold = 0;
break;
case 24:
s->t_attrib.uline = 0;
break;
case 25:
s->t_attrib.blink = 0;
break;
case 27:
s->t_attrib.invers = 0;
break;
case 28:
s->t_attrib.unvisible = 0;
break;
/* set foreground color */
case 30:
s->t_attrib.fgcol = QEMU_COLOR_BLACK;
break;
case 31:
s->t_attrib.fgcol = QEMU_COLOR_RED;
break;
case 32:
s->t_attrib.fgcol = QEMU_COLOR_GREEN;
break;
case 33:
s->t_attrib.fgcol = QEMU_COLOR_YELLOW;
break;
case 34:
s->t_attrib.fgcol = QEMU_COLOR_BLUE;
break;
case 35:
s->t_attrib.fgcol = QEMU_COLOR_MAGENTA;
break;
case 36:
s->t_attrib.fgcol = QEMU_COLOR_CYAN;
break;
case 37:
s->t_attrib.fgcol = QEMU_COLOR_WHITE;
break;
/* set background color */
case 40:
s->t_attrib.bgcol = QEMU_COLOR_BLACK;
break;
case 41:
s->t_attrib.bgcol = QEMU_COLOR_RED;
break;
case 42:
s->t_attrib.bgcol = QEMU_COLOR_GREEN;
break;
case 43:
s->t_attrib.bgcol = QEMU_COLOR_YELLOW;
break;
case 44:
s->t_attrib.bgcol = QEMU_COLOR_BLUE;
break;
case 45:
s->t_attrib.bgcol = QEMU_COLOR_MAGENTA;
break;
case 46:
s->t_attrib.bgcol = QEMU_COLOR_CYAN;
break;
case 47:
s->t_attrib.bgcol = QEMU_COLOR_WHITE;
break;
}
}
}
static void console_clear_xy(QemuConsole *s, int x, int y)
{
int y1 = (s->y_base + y) % s->total_height;
if (x >= s->width) {
x = s->width - 1;
}
TextCell *c = &s->cells[y1 * s->width + x];
c->ch = ' ';
c->t_attrib = s->t_attrib_default;
update_xy(s, x, y);
}
static void console_put_one(QemuConsole *s, int ch)
{
TextCell *c;
int y1;
if (s->x >= s->width) {
/* line wrap */
s->x = 0;
console_put_lf(s);
}
y1 = (s->y_base + s->y) % s->total_height;
c = &s->cells[y1 * s->width + s->x];
c->ch = ch;
c->t_attrib = s->t_attrib;
update_xy(s, s->x, s->y);
s->x++;
}
static void console_respond_str(QemuConsole *s, const char *buf)
{
while (*buf) {
console_put_one(s, *buf);
buf++;
}
}
/* set cursor, checking bounds */
static void set_cursor(QemuConsole *s, int x, int y)
{
if (x < 0) {
x = 0;
}
if (y < 0) {
y = 0;
}
if (y >= s->height) {
y = s->height - 1;
}
if (x >= s->width) {
x = s->width - 1;
}
s->x = x;
s->y = y;
}
static void console_putchar(QemuConsole *s, int ch)
{
int i;
int x, y;
char response[40];
switch(s->state) {
case TTY_STATE_NORM:
switch(ch) {
case '\r': /* carriage return */
s->x = 0;
break;
case '\n': /* newline */
console_put_lf(s);
break;
case '\b': /* backspace */
if (s->x > 0)
s->x--;
break;
case '\t': /* tabspace */
if (s->x + (8 - (s->x % 8)) > s->width) {
s->x = 0;
console_put_lf(s);
} else {
s->x = s->x + (8 - (s->x % 8));
}
break;
case '\a': /* alert aka. bell */
/* TODO: has to be implemented */
break;
case 14:
/* SI (shift in), character set 0 (ignored) */
break;
case 15:
/* SO (shift out), character set 1 (ignored) */
break;
case 27: /* esc (introducing an escape sequence) */
s->state = TTY_STATE_ESC;
break;
default:
console_put_one(s, ch);
break;
}
break;
case TTY_STATE_ESC: /* check if it is a terminal escape sequence */
if (ch == '[') {
for(i=0;i<MAX_ESC_PARAMS;i++)
s->esc_params[i] = 0;
s->nb_esc_params = 0;
s->state = TTY_STATE_CSI;
} else {
s->state = TTY_STATE_NORM;
}
break;
case TTY_STATE_CSI: /* handle escape sequence parameters */
if (ch >= '0' && ch <= '9') {
if (s->nb_esc_params < MAX_ESC_PARAMS) {
int *param = &s->esc_params[s->nb_esc_params];
int digit = (ch - '0');
*param = (*param <= (INT_MAX - digit) / 10) ?
*param * 10 + digit : INT_MAX;
}
} else {
if (s->nb_esc_params < MAX_ESC_PARAMS)
s->nb_esc_params++;
if (ch == ';' || ch == '?') {
break;
}
trace_console_putchar_csi(s->esc_params[0], s->esc_params[1],
ch, s->nb_esc_params);
s->state = TTY_STATE_NORM;
switch(ch) {
case 'A':
/* move cursor up */
if (s->esc_params[0] == 0) {
s->esc_params[0] = 1;
}
set_cursor(s, s->x, s->y - s->esc_params[0]);
break;
case 'B':
/* move cursor down */
if (s->esc_params[0] == 0) {
s->esc_params[0] = 1;
}
set_cursor(s, s->x, s->y + s->esc_params[0]);
break;
case 'C':
/* move cursor right */
if (s->esc_params[0] == 0) {
s->esc_params[0] = 1;
}
set_cursor(s, s->x + s->esc_params[0], s->y);
break;
case 'D':
/* move cursor left */
if (s->esc_params[0] == 0) {
s->esc_params[0] = 1;
}
set_cursor(s, s->x - s->esc_params[0], s->y);
break;
case 'G':
/* move cursor to column */
set_cursor(s, s->esc_params[0] - 1, s->y);
break;
case 'f':
case 'H':
/* move cursor to row, column */
set_cursor(s, s->esc_params[1] - 1, s->esc_params[0] - 1);
break;
case 'J':
switch (s->esc_params[0]) {
case 0:
/* clear to end of screen */
for (y = s->y; y < s->height; y++) {
for (x = 0; x < s->width; x++) {
if (y == s->y && x < s->x) {
continue;
}
console_clear_xy(s, x, y);
}