90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
#include "types.h"
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#include "kbd.h"
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#include "stlio.h"
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extern char kbd_prev_key;
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extern int kbd_prev_active;
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static u8 COLOR_FG = Green;
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static u8 COLOR_BG = White;
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#define write_char(c) write_cell_fb(c, COLOR_FG, COLOR_BG)
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// We are assuming null-terminated strings here
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u32 strlen(const char* buffer) {
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u32 i = 0;
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char c = buffer[i];
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while(c != '\0') {
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i++;
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c = buffer[i];
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}
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return i;
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}
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u32 write(const char* buffer, const u32 size) {
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u32 i;
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for(i = 0; i < size; i++) {
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// cheesy but whatever
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if(buffer[i] == '\n') {
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frame_buffer_newline();
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}
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else {
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write_char(buffer[i]);
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}
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}
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return i;
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}
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u32 read(char* buffer, u32 size) {
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// Read up to size-1 characters or until a \n is written
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// once we reacch size -1 bytes read then we change the last char to a \0
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kbd_prev_active = false; // we only do this to discard the leftovers from
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u32 bytes_read = 0;
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while(bytes_read < size-1) {
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if(kbd_prev_active) {
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bytes_read++;
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if(kbd_prev_key == '\n') {
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break;
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}
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else {
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buffer[bytes_read] = kbd_prev_key;
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}
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}
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}
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printf("You entered: "); printf(buffer);
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return bytes_read;
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}
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void printf(const char* fmt) {
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// Variadic fuller version of print on seperate branch but its nowhere near stable/ready/working
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u32 size = strlen(fmt);
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for(u32 i = 0; i < size;i++) {
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if(fmt[i] == '\n') {
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frame_buffer_newline();
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}
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else {
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write_char(fmt[i]);
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}
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}
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}
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void printhex(u32 num) {
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// Prints our hex version of whatever is given
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const char _chars[] = "0123456789abcdef";
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u32 idx = 0; // used as hash into the _chars mapping
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// iterate over each nibble
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for(u32 i = 0 ;i < 8;i++) {
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idx = (num << (i * 4)) & 0xf0000000;
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idx = idx >> 28;
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putch(_chars[idx]);
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}
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}
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void putch(const char c) {
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if(c == '\n') {
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frame_buffer_newline();
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}
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else {
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write_char(c);
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}
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}
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