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hl-vt100: basic utf-8 support

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This commit is contained in:
Jeff Epler 2024-08-27 10:15:17 -05:00
parent 41d0a87984
commit b3aa492f9a
2 changed files with 43 additions and 2 deletions
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44
hl-vt100/src/lw_terminal_vt100.c
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@ -967,8 +967,7 @@ static void HTS(struct lw_terminal *term_emul)
vt100->tabulations[vt100->x] = '|';
}
static void vt100_write(struct lw_terminal *term_emul, char c)
{
static void vt100_write_unicode(struct lw_terminal *term_emul, int c) {
struct lw_terminal_vt100 *vt100;
vt100 = (struct lw_terminal_vt100 *)term_emul->user_data;
@ -1022,6 +1021,47 @@ static void vt100_write(struct lw_terminal *term_emul, char c)
vt100->x += 1;
}
#define REPLACEMENT ('?')
static void vt100_write(struct lw_terminal *term_emul, char c) {
struct lw_terminal_vt100 *vt100;
uint8_t uc = c;
vt100 = (struct lw_terminal_vt100 *)term_emul->user_data;
if (vt100->ustate == 0) {
if (uc < 0x80) {
vt100_write_unicode(term_emul, uc);
} else if((uc & 0xe0) == 0xc0) {
vt100->ustate = 1;
vt100->ubits = (uc & 0x1f);
} else if((uc & 0xf0) == 0xe0) {
vt100->ustate = 2;
vt100->ubits = (uc & 0xf);
} else if((uc & 0xf8) == 0xf0) {
vt100->ustate = 3;
vt100->ubits = (uc & 0x7);
} else {
vt100_write_unicode(term_emul, REPLACEMENT);
}
} else {
if (uc < 0x80) {
vt100_write_unicode(term_emul, REPLACEMENT);
vt100_write_unicode(term_emul, uc);
vt100->ustate = 0;
} else if ((uc & 0xc0) != 0x80) {
vt100_write_unicode(term_emul, REPLACEMENT);
vt100->ustate = 0;
} else {
vt100->ubits <<= 6;
vt100->ubits |= uc & 0x3f;
if (--vt100->ustate == 0) {
vt100_write_unicode(term_emul, vt100->ubits);
}
}
}
}
const lw_cell_t *lw_terminal_vt100_getline(struct lw_terminal_vt100 *vt100, unsigned int y) {
if (y < vt100->margin_top || y > vt100->margin_bottom)
return vt100->afrozen_screen + FROZEN_SCREEN_PTR(vt100, 0, y);

1
hl-vt100/src/lw_terminal_vt100.h
View file

@ -84,6 +84,7 @@ struct lw_parsed_attr {
struct lw_terminal_vt100
{
struct lw_terminal *lw_terminal;
int ustate, ubits;
unsigned int width;
unsigned int height;
unsigned int x;