game/axl_io.c

#include "axl_io.h"
#include <windows.h>
#include "axl_string.h"

i32 axl_putchar(i32 c)
{
    u8 buf[4];
    int len = 0;
    
    if (c <= 0x7F)
    {
        buf[0] = (u8)c;
        len = 1;
    }
    else if (c <= 0x07FF) 
    {
        buf[0] = 0xC0 | (u8)(c >> 6);
        buf[1] = 0x80 | (u8)(c & 0x3F);
        len = 2;
    }
    else if (c <= 0xFFFF) 
    {
        buf[0] = 0xE0 | (u8)(c >> 12);
        buf[1] = 0x80 | (u8)((c >> 6) & 0x3F);
        buf[2] = 0x80 | (u8)(c & 0x3F);
        len = 3;
    }
    else if (c <= 0x10FFFF) 
    {
        buf[0] = 0xF0 | (u8)(c >> 18);
        buf[1] = 0x80 | (u8)((c >> 12) & 0x3F);
        buf[2] = 0x80 | (u8)((c >> 6) & 0x3F);
        buf[3] = 0x80 | (u8)(c & 0x3F);
        len = 4;
    }
    else 
    {
        return AXL_EOF;
    }
    
    HANDLE console_handle = GetStdHandle(STD_OUTPUT_HANDLE);
    if (console_handle == INVALID_HANDLE_VALUE) 
    {
        return AXL_EOF;
    }
    
    DWORD bytes_written = 0;
    BOOL status = WriteConsoleA(console_handle, buf, len, &bytes_written, NULL);
    
    if (!status || bytes_written != (DWORD)len)
    {
        return AXL_EOF;
    }
    
    return c;
}

i32 axl_puts(const i8* str)
{
    HANDLE console_handle = GetStdHandle(STD_OUTPUT_HANDLE);

    if(console_handle == INVALID_HANDLE_VALUE)
    {
        return AXL_EOF;
    }

    DWORD str_length = (DWORD)axl_strlen(str);
    DWORD bytes_written = 0;
    
    BOOL status = WriteConsoleA(console_handle, str, str_length, &bytes_written, 
                                NULL);
    if(!status || bytes_written != str_length)
    {
        return AXL_EOF;
    }

    if(axl_putchar('\n') != '\n')
    {
        return AXL_EOF;
    }

    return AXL_SUCCESS;
}