mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-12-25 11:46:05 +00:00
132 lines
3 KiB
C
132 lines
3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <sys/iosupport.h>
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#include "console.h"
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#include "display/video_fb.h"
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static ssize_t console_write(struct _reent *r, void *fd, const char *ptr, size_t len);
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static const devoptab_t dotab_stdout = {
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.name = "con",
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.write_r = console_write,
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};
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/* https://github.com/switchbrew/libnx/blob/master/nx/source/runtime/util/utf/decode_utf8.c */
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ssize_t decode_utf8(uint32_t *out, const uint8_t *in) {
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uint8_t code1, code2, code3, code4;
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code1 = *in++;
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if(code1 < 0x80) {
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/* 1-byte sequence */
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*out = code1;
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return 1;
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} else if(code1 < 0xC2) {
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return -1;
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} else if(code1 < 0xE0) {
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/* 2-byte sequence */
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code2 = *in++;
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if((code2 & 0xC0) != 0x80) {
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return -1;
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}
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*out = (code1 << 6) + code2 - 0x3080;
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return 2;
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} else if(code1 < 0xF0) {
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/* 3-byte sequence */
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code2 = *in++;
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if((code2 & 0xC0) != 0x80) {
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return -1;
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}
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if(code1 == 0xE0 && code2 < 0xA0) {
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return -1;
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}
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code3 = *in++;
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if((code3 & 0xC0) != 0x80) {
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return -1;
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}
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*out = (code1 << 12) + (code2 << 6) + code3 - 0xE2080;
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return 3;
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} else if(code1 < 0xF5) {
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/* 4-byte sequence */
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code2 = *in++;
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if((code2 & 0xC0) != 0x80) {
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return -1;
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}
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if(code1 == 0xF0 && code2 < 0x90) {
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return -1;
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}
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if(code1 == 0xF4 && code2 >= 0x90) {
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return -1;
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}
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code3 = *in++;
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if((code3 & 0xC0) != 0x80) {
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return -1;
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}
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code4 = *in++;
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if((code4 & 0xC0) != 0x80) {
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return -1;
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}
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*out = (code1 << 18) + (code2 << 12) + (code3 << 6) + code4 - 0x3C82080;
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return 4;
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}
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return -1;
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}
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static ssize_t console_write(struct _reent *r, void *fd, const char *ptr, size_t len) {
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size_t i = 0;
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while (i < len) {
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uint32_t chr;
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ssize_t n = decode_utf8(&chr, (uint8_t *)(ptr + i));
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if (n == -1) {
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break;
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} else {
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i += (size_t)n;
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video_putc(chr > 0xFF ? '?' : (char)chr);
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}
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}
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return i;
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}
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static bool g_console_created = false;
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static int console_create(void) {
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if (g_console_created) {
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errno = EEXIST;
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return -1;
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}
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devoptab_list[STD_OUT] = &dotab_stdout;
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devoptab_list[STD_ERR] = &dotab_stdout;
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setvbuf(stdout, NULL , _IONBF, 0);
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setvbuf(stderr, NULL , _IONBF, 0);
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g_console_created = true;
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return 0;
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}
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int console_init(void *fb) {
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if (video_init(fb) == -1) {
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errno = EIO;
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return -1;
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}
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return console_create();
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}
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int console_resume(void *fb, int row, int col) {
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video_resume(fb, row, col); if(false){// if (video_resume(fb, row, col) == -1) {
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errno = EIO;
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return -1;
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}
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return console_create();
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}
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