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Diffstat (limited to 'extras/ezio/ezio.c')
| -rw-r--r-- | extras/ezio/ezio.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/extras/ezio/ezio.c b/extras/ezio/ezio.c new file mode 100644 index 000000000..6024766e2 --- /dev/null +++ b/extras/ezio/ezio.c @@ -0,0 +1,243 @@ +/* Copyright (c) 2008, 2009 Nicira Networks, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * In addition, as a special exception, Nicira Networks gives permission + * to link the code of its release of vswitchd with the OpenSSL project's + * "OpenSSL" library (or with modified versions of it that use the same + * license as the "OpenSSL" library), and distribute the linked + * executables. You must obey the GNU General Public License in all + * respects for all of the code used other than "OpenSSL". If you modify + * this file, you may extend this exception to your version of the file, + * but you are not obligated to do so. If you do not wish to do so, + * delete this exception statement from your version. + * + */ + +#include <config.h> +#include "ezio.h" +#include <assert.h> +#include <stddef.h> +#include <string.h> +#include "util.h" + +static void remove_elements(uint8_t *p, size_t n_elems, size_t elem_size, + int pos, int n_del); +static void insert_elements(uint8_t *p, size_t n_elems, size_t elem_size, + int pos, int n_insert); +static int range(int value, int min, int max); + +void +ezio_init(struct ezio *e) +{ + memset(e->icons, 0, sizeof e->icons); + ezio_clear(e); + e->x_ofs = 0; + e->show_cursor = true; + e->blink_cursor = false; +} + +void +ezio_set_icon(struct ezio *e, int idx, + int row0, int row1, int row2, int row3, + int row4, int row5, int row6, int row7) +{ + e->icons[idx][0] = row0; + e->icons[idx][1] = row1; + e->icons[idx][2] = row2; + e->icons[idx][3] = row3; + e->icons[idx][4] = row4; + e->icons[idx][5] = row5; + e->icons[idx][6] = row6; + e->icons[idx][7] = row7; +} + +void +ezio_set_default_icon(struct ezio *e, int idx) +{ + uint8_t *icon; + + assert(idx >= 0 && idx < 8); + icon = e->icons[idx]; + if (idx == 6) { + ezio_set_icon(e, idx, + e_____, + eX____, + e_X___, + e__X__, + e___X_, + e____X, + e_____, + e_____); + } else if (idx == 7) { + ezio_set_icon(e, idx, + e_____, + e_____, + e_X___, + eX_X_X, + eX_X_X, + e___X_, + e_____, + e_____); + } else { + ezio_set_icon(e, idx, + e_____, + e_____, + e_____, + e_____, + e_____, + e_____, + e_____, + e_____); + } +} + +void +ezio_clear(struct ezio *e) +{ + memset(e->chars, ' ', sizeof e->chars); + e->x = e->y = 0; +} + +void +ezio_put_char(struct ezio *e, int x, int y, uint8_t c) +{ + assert(x >= 0 && x <= 39); + assert(y >= 0 && y <= 1); + e->chars[y][x] = c != 0xfe ? c : 0xff; +} + +void +ezio_line_feed(struct ezio *e) +{ + if (++e->y >= 2) { + e->y = 1; + ezio_scroll_up(e, 1); + } +} + +void +ezio_newline(struct ezio *e) +{ + e->x = 0; + ezio_line_feed(e); +} + +void +ezio_delete_char(struct ezio *e, int x, int y, int n) +{ + remove_elements(&e->chars[y][0], 40, 1, x, n); +} + +void +ezio_delete_line(struct ezio *e, int y, int n) +{ + remove_elements(e->chars[0], 2, 40, y, n); +} + +void +ezio_insert_char(struct ezio *e, int x, int y, int n) +{ + insert_elements(&e->chars[y][0], 40, 1, x, n); +} + +void +ezio_insert_line(struct ezio *e, int y, int n) +{ + insert_elements(&e->chars[0][0], 2, 40, y, n); +} + +void +ezio_scroll_left(struct ezio *e, int n) +{ + int y; + for (y = 0; y < 2; y++) { + ezio_delete_char(e, 0, y, n); + } +} + +void +ezio_scroll_right(struct ezio *e, int n) +{ + int y; + + for (y = 0; y < 2; y++) { + ezio_insert_char(e, 0, y, n); + } +} + +void +ezio_scroll_up(struct ezio *e, int n) +{ + ezio_delete_line(e, 0, n); +} + +void +ezio_scroll_down(struct ezio *e, int n) +{ + ezio_insert_line(e, 0, n); +} + +bool +ezio_chars_differ(const struct ezio *a, const struct ezio *b, int x0, int x1, + int *xp, int *yp) +{ + int x, y; + + x0 = range(x0, 0, 39); + x1 = range(x1, 1, 40); + for (y = 0; y < 2; y++) { + for (x = x0; x < x1; x++) { + if (a->chars[y][x] != b->chars[y][x]) { + *xp = x; + *yp = y; + return true; + } + } + } + return false; +} + +static void +remove_elements(uint8_t *p, size_t n_elems, size_t elem_size, + int pos, int n_del) +{ + if (pos >= 0 && pos < n_elems) { + n_del = MIN(n_del, n_elems - pos); + memmove(p + elem_size * pos, + p + elem_size * (pos + n_del), + elem_size * (n_elems - pos - n_del)); + memset(p + elem_size * (n_elems - n_del), ' ', n_del * elem_size); + } +} + +static void +insert_elements(uint8_t *p, size_t n_elems, size_t elem_size, + int pos, int n_insert) +{ + if (pos >= 0 && pos < n_elems) { + n_insert = MIN(n_insert, n_elems - pos); + memmove(p + elem_size * (pos + n_insert), + p + elem_size * pos, + elem_size * (n_elems - pos - n_insert)); + memset(p + elem_size * pos, ' ', n_insert * elem_size); + } +} + +static int +range(int value, int min, int max) +{ + return value < min ? min : value > max ? max : value; +} + |