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feature: scrolling (and memcpy added)

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This commit is contained in:
0x35c 2024-09-07 14:32:48 +02:00
parent 69caa70c38
commit 5b4d1fbf36
4 changed files with 55 additions and 29 deletions
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1
headers/string.h
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@ -7,3 +7,4 @@ int strcmp(const char *s1, const char *s2);
int strncmp(const char *s1, const char *s2, size_t n); int strncmp(const char *s1, const char *s2, size_t n);
size_t strlen(const char *str); size_t strlen(const char *str);
char *strstr(const char *haystack, const char *needle); char *strstr(const char *haystack, const char *needle);
void *memcpy(void *dest, const void *src, size_t n);

14
src/string/memcpy.c Normal file
View File

@ -0,0 +1,14 @@
#include "kprintf.h"
#include <stddef.h>
#include <stdint.h>
void *memcpy(void *dest, const void *src, size_t n)
{
uint16_t *c1 = (uint16_t *)dest;
const uint16_t *c2 = (const uint16_t *)src;
for (size_t i = 0; i < n; i++)
c1[i] = c2[i];
kprintf(0, "c1: %s\n", c1);
return c1;
}

33
src/terminal/put.c
View File

@ -1,6 +1,7 @@
#include "terminal.h" #include "terminal.h"
#include "string.h"
#include "ctype.h" #include "ctype.h"
#include "kprintf.h"
#include "string.h"
#include <stdbool.h> #include <stdbool.h>
#include <stddef.h> #include <stddef.h>
@ -23,7 +24,6 @@ size_t terminal_row;
size_t terminal_column; size_t terminal_column;
uint8_t terminal_color; uint8_t terminal_color;
uint16_t *terminal_buffer; uint16_t *terminal_buffer;
void terminal_initialize(void) void terminal_initialize(void)
{ {
terminal_row = 0; terminal_row = 0;
@ -49,22 +49,33 @@ void terminal_putentryat(char c, uint8_t color, size_t x, size_t y)
terminal_buffer[index] = vga_entry(c, color); terminal_buffer[index] = vga_entry(c, color);
} }
static void terminal_scroll(void)
{
terminal_row--;
for (size_t i = 0; i < VGA_WIDTH * (VGA_HEIGHT - 1); i++)
terminal_buffer[i] = terminal_buffer[i + VGA_WIDTH];
for (size_t i = 0; i < VGA_WIDTH; i++)
terminal_putentryat(' ', terminal_color, i, VGA_HEIGHT - 1);
}
static void terminal_new_line(void)
{
terminal_column = 0;
if (++terminal_row == VGA_HEIGHT)
terminal_scroll();
}
int terminal_putchar(char c) int terminal_putchar(char c)
{ {
if (c == '\r') if (c == '\r')
terminal_column = 0; terminal_column = 0;
else if (c == '\n') { else if (c == '\n')
terminal_column = 0; terminal_new_line();
terminal_row++;
}
if (!isprint(c)) if (!isprint(c))
return 1; return 1;
terminal_putentryat(c, terminal_color, terminal_column, terminal_row); terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
if (++terminal_column == VGA_WIDTH) { if (++terminal_column == VGA_WIDTH)
terminal_column = 0; terminal_new_line();
if (++terminal_row == VGA_HEIGHT)
terminal_row = 0;
}
return 1; return 1;
} }