96 lines
1.4 KiB
C
96 lines
1.4 KiB
C
#include "text.h"
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int txt_debug = 0;
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static unsigned short * textmemptr = (unsigned short *)0xB8000;
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static void placech(unsigned char c, int x, int y, int attr) {
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unsigned short *where;
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unsigned att = attr << 8;
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where = textmemptr + (y * 80 + x);
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*where = c | att;
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}
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int x = 0;
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int y = 0;
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int attr = 0x07;
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void print_(char * str) {
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while (*str) {
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if (*str == '\n') {
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for (; x < 80; ++x) {
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placech(' ', x, y, attr);
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}
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x = 0;
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y += 1;
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if (y == 24) {
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y = 0;
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}
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} else {
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placech(*str, x, y, attr);
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x++;
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if (x == 80) {
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x = 0;
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y += 1;
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if (y == 24) {
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y = 0;
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}
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}
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}
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str++;
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}
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}
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void move_cursor(int _x, int _y) {
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x = _x;
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y = _y;
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}
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void set_attr(int _attr) {
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attr = _attr;
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}
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void print_banner(char * str) {
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if (!str) {
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for (int i = 0; i < 80; ++i) {
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placech(' ', i, y, attr);
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}
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y++;
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return;
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}
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int len = 0;
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char *c = str;
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while (*c) {
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len++;
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c++;
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}
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int off = (80 - len) / 2;
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for (int i = 0; i < 80; ++i) {
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placech(' ', i, y, attr);
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}
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for (int i = 0; i < len; ++i) {
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placech(str[i], i + off, y, attr);
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}
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y++;
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}
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void print_hex_(unsigned int value) {
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char out[9] = {0};
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for (int i = 7; i > -1; i--) {
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out[i] = "0123456789abcdef"[(value >> (4 * (7 - i))) & 0xF];
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}
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print_(out);
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}
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void clear_() {
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x = 0;
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y = 0;
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for (int y = 0; y < 24; ++y) {
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for (int x = 0; x < 80; ++x) {
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placech(' ', x, y, 0x00);
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}
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}
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}
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