88 lines
1.6 KiB
C
88 lines
1.6 KiB
C
#include <e9print.h>
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#include <stddef.h>
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#include <stdint.h>
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void (*limine_print)(const char *buf, size_t size) = NULL;
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static const char CONVERSION_TABLE[] = "0123456789abcdef";
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void e9_putc(char c) {
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if (limine_print != NULL)
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limine_print(&c, 1);
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__asm__ __volatile__ ("outb %0, %1" :: "a" (c), "Nd" (0xe9) : "memory");
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}
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void e9_print(const char *msg) {
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for (size_t i = 0; msg[i]; i++) {
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e9_putc(msg[i]);
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}
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}
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void e9_puts(const char *msg) {
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e9_print(msg);
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e9_putc('\n');
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}
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static void e9_printhex(size_t num) {
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int i;
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char buf[17];
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if (!num) {
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e9_print("0x0");
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return;
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}
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buf[16] = 0;
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for (i = 15; num; i--) {
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buf[i] = CONVERSION_TABLE[num % 16];
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num /= 16;
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}
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i++;
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e9_print("0x");
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e9_print(&buf[i]);
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}
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static void e9_printdec(size_t num) {
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int i;
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char buf[21] = {0};
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if (!num) {
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e9_putc('0');
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return;
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}
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for (i = 19; num; i--) {
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buf[i] = (num % 10) + 0x30;
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num = num / 10;
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}
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i++;
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e9_print(buf + i);
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}
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void e9_printf(const char *format, ...) {
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va_list argp;
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va_start(argp, format);
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while (*format != '\0') {
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if (*format == '%') {
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format++;
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if (*format == 'x') {
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e9_printhex(va_arg(argp, size_t));
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} else if (*format == 'd') {
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e9_printdec(va_arg(argp, size_t));
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} else if (*format == 's') {
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e9_print(va_arg(argp, char*));
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}
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} else {
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e9_putc(*format);
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}
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format++;
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}
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e9_putc('\n');
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va_end(argp);
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}
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