mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-03-09 10:26:21 +00:00
73 lines
3.8 KiB
C
73 lines
3.8 KiB
C
|
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
||
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
||
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
||
|
|
│ This is free and unencumbered software released into the public domain. │
|
||
|
|
│ │
|
||
|
|
│ Anyone is free to copy, modify, publish, use, compile, sell, or │
|
||
|
|
│ distribute this software, either in source code form or as a compiled │
|
||
|
|
│ binary, for any purpose, commercial or non-commercial, and by any │
|
||
|
|
│ means. │
|
||
|
|
│ │
|
||
|
|
│ In jurisdictions that recognize copyright laws, the author or authors │
|
||
|
|
│ of this software dedicate any and all copyright interest in the │
|
||
|
|
│ software to the public domain. We make this dedication for the benefit │
|
||
|
|
│ of the public at large and to the detriment of our heirs and │
|
||
|
|
│ successors. We intend this dedication to be an overt act of │
|
||
|
|
│ relinquishment in perpetuity of all present and future rights to this │
|
||
|
|
│ software under copyright law. │
|
||
|
|
│ │
|
||
|
|
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
|
||
|
|
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
|
||
|
|
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
|
||
|
|
│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
|
||
|
|
│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
|
||
|
|
│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
|
||
|
|
│ OTHER DEALINGS IN THE SOFTWARE. │
|
||
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
||
|
|
#include "libc/calls/struct/fd.internal.h"
|
||
|
|
#include "libc/calls/struct/iovec.h"
|
||
|
|
#include "libc/calls/struct/iovec.internal.h"
|
||
|
|
#include "libc/vga/vga.internal.h"
|
||
|
|
#include "libc/runtime/pc.internal.h"
|
||
|
|
#include "libc/str/str.h"
|
||
|
|
|
||
|
|
static struct Tty vga_tty;
|
||
|
|
#ifdef VGA_USE_WCS
|
||
|
|
static wchar_t vga_wcs[VGA_TTY_HEIGHT * VGA_TTY_WIDTH];
|
||
|
|
#else
|
||
|
|
static wchar_t * const vga_wcs = NULL;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ssize_t sys_writev_vga(struct Fd *fd, const struct iovec *iov, int iovlen) {
|
||
|
|
size_t i, wrote = 0;
|
||
|
|
ssize_t res = 0;
|
||
|
|
for (i = 0; i < iovlen; ++i) {
|
||
|
|
void *input = iov[i].iov_base;
|
||
|
|
size_t len = iov[i].iov_len;
|
||
|
|
res = _TtyWrite(&vga_tty, input, len);
|
||
|
|
if (res < 0)
|
||
|
|
break;
|
||
|
|
wrote += res;
|
||
|
|
if (res != len)
|
||
|
|
return wrote;
|
||
|
|
}
|
||
|
|
if (!wrote)
|
||
|
|
return res;
|
||
|
|
return wrote;
|
||
|
|
}
|
||
|
|
|
||
|
|
__attribute__((__constructor__)) static textstartup void _vga_init(void) {
|
||
|
|
void * const vid_buf = (void *)(BANE + 0xb8000ull);
|
||
|
|
/* Get the initial cursor position from the BIOS data area. */
|
||
|
|
typedef struct {
|
||
|
|
unsigned char col, row;
|
||
|
|
} bios_curs_pos_t;
|
||
|
|
bios_curs_pos_t pos = *(bios_curs_pos_t *)(BANE + 0x0450ull);
|
||
|
|
/*
|
||
|
|
* Initialize our tty structure from the current screen contents & current
|
||
|
|
* cursor position.
|
||
|
|
*/
|
||
|
|
_StartTty(&vga_tty, VGA_TTY_HEIGHT, VGA_TTY_WIDTH, pos.row, pos.col,
|
||
|
|
vid_buf, vga_wcs);
|
||
|
|
}
|