diff options
Diffstat (limited to 'contrib/syslinux-4.02/com32/lib/sys/libansi.c')
| -rw-r--r-- | contrib/syslinux-4.02/com32/lib/sys/libansi.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/sys/libansi.c b/contrib/syslinux-4.02/com32/lib/sys/libansi.c new file mode 100644 index 0000000..a011cb8 --- /dev/null +++ b/contrib/syslinux-4.02/com32/lib/sys/libansi.c @@ -0,0 +1,247 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2009 Erwan Velu - All Rights Reserved + * + * 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. + * + * ----------------------------------------------------------------------- + * Ansi Sequences can be found here : + * http://ascii-table.com/ansi-escape-sequences-vt-100.php + * http://en.wikipedia.org/wiki/ANSI_escape_code + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <stdbool.h> +#include <stdint.h> + +#include "libansi.h" + +void display_cursor(bool status) +{ + if (status == true) { + fputs(CSI "?25h", stdout); + } else { + fputs(CSI "?25l", stdout); + } +} + +void clear_end_of_line(void) +{ + fputs(CSI "0K", stdout); +} + +void move_cursor_left(int count) +{ + char buffer[10]; + memset(buffer,0,sizeof(buffer)); + sprintf(buffer,CSI "%dD",count); + fputs(buffer, stdout); +} + +void move_cursor_right(int count) +{ + char buffer[10]; + memset(buffer,0,sizeof(buffer)); + sprintf(buffer, CSI "%dC", count); + fputs(buffer, stdout); +} + +void set_cursor_blink(bool status) { + if (status == true) + fputs("\033[05m",stdout); + else + fputs("\033[0m",stdout); +} + +void clear_line(void) +{ + fputs(CSI "2K", stdout); +} + +void clear_beginning_of_line(void) +{ + fputs(CSI "1K", stdout); +} + +void move_cursor_to_column(int count) +{ + char buffer[10]; + memset(buffer,0,sizeof(buffer)); + sprintf(buffer, CSI "%dG", count); + fputs(buffer, stdout); +} + +void move_cursor_to_next_line(void) +{ + fputs("\033e", stdout); +} + +void disable_utf8(void) +{ + fputs("\033%@", stdout); +} + +void set_g1_special_char(void){ + fputs("\033)0", stdout); +} + +void set_us_g0_charset(void) +{ + fputs("\033(B\1#0", stdout); +} + +void clear_entire_screen(void) +{ + fputs(CSI "2J", stdout); +} + +/** + * cprint_vga2ansi - given a VGA attribute, print a character + * @chr: character to print + * @attr: vga attribute + * + * Convert the VGA attribute @attr to an ANSI escape sequence and + * print it. + * For performance, SGR parameters are cached. To reset them, + * call cprint_vga2ansi('0', '0'). + **/ +static void cprint_vga2ansi(const char chr, const char attr) +{ + static const char ansi_char[8] = "04261537"; + static uint16_t last_attr = 0x300; + char buf[16], *p; + + if (chr == '0' && attr == '0') { + last_attr = 0x300; + return; + } + + if (attr != last_attr) { + bool reset = false; + p = buf; + *p++ = '\033'; + *p++ = '['; + + if (last_attr & ~attr & 0x88) { + *p++ = '0'; + *p++ = ';'; + /* Reset last_attr to unknown to handle + * background/foreground attributes correctly */ + last_attr = 0x300; + reset = true; + } + if (attr & 0x08) { + *p++ = '1'; + *p++ = ';'; + } + if (attr & 0x80) { + *p++ = '4'; + *p++ = ';'; + } + if (reset || (attr ^ last_attr) & 0x07) { + *p++ = '3'; + *p++ = ansi_char[attr & 7]; + *p++ = ';'; + } + if (reset || (attr ^ last_attr) & 0x70) { + *p++ = '4'; + *p++ = ansi_char[(attr >> 4) & 7]; + *p++ = ';'; + } + p[-1] = 'm'; /* We'll have generated at least one semicolon */ + p[0] = '\0'; + + last_attr = attr; + + fputs(buf, stdout); + } + + putchar(chr); +} + +/* + * cls - clear and initialize the entire screen + * + * Note: when initializing xterm, one has to specify that + * G1 points to the alternate character set (this is not true + * by default). Without the initial printf "\033)0", line drawing + * characters won't be displayed. + */ +void cls(void) +{ + fputs("\033e\033%@\033)0\033(B\1#0\033[?25l\033[2J", stdout); + + /* Reset SGR parameters cache */ + cprint_vga2ansi('0', '0'); +} + +void reset_colors(void) +{ + csprint(CSI "1D", 0x07); +} + +/** + * cprint - given a VGA attribute, print a single character at cursor + * @chr: character to print + * @attr: VGA attribute + * @times: number of times to print @chr + * + * Note: @attr is a VGA attribute. + **/ +void cprint(const char chr, const char attr, unsigned int times) +{ + while (times--) + cprint_vga2ansi(chr, attr); +} + +/** + * csprint - given a VGA attribute, print a NULL-terminated string + * @str: string to print + * @attr: VGA attribute + **/ +void csprint(const char *str, const char attr) +{ + while (*str) { + cprint(*str, attr, 1); + str++; + } +} + +/** + * clearwindow - fill a given a region on the screen + * @top, @left, @bot, @right: coordinates to fill + * @fillchar: character to use to fill the region + * @fillattr: character attribute (VGA) + **/ +void clearwindow(const char top, const char left, const char bot, + const char right, const char fillchar, const char fillattr) +{ + char x; + for (x = top; x < bot + 1; x++) { + gotoxy(x, left); + cprint(fillchar, fillattr, right - left + 1); + } +} + + |