mirrors/foot
1
0
Fork 0
mirror of https://codeberg.org/dnkl/foot.git synced 2026-02-05 04:06:08 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

vt: initial version of UTF-8 decoding built-in into the VT parser

Browse source
This commit is contained in:
Daniel Eklöf 2020-06-07 16:16:50 +02:00
parent 0969b2ebd7
commit 9452aff020
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
2 changed files with 134 additions and 37 deletions
Download patch file Download diff file Expand all files Collapse all files

166
vt.c
View file

@ -38,9 +38,12 @@ enum state {
STATE_SOS_PM_APC_STRING,
STATE_UTF8_COLLECT_1,
STATE_UTF8_COLLECT_2,
STATE_UTF8_COLLECT_3,
STATE_UTF8_21,
STATE_UTF8_31,
STATE_UTF8_32,
STATE_UTF8_41,
STATE_UTF8_42,
STATE_UTF8_43,
};
#if defined(_DEBUG) && defined(LOG_ENABLE_DBG) && LOG_ENABLE_DBG && 0
@ -65,9 +68,9 @@ static const char *const state_names[] = {
[STATE_SOS_PM_APC_STRING] = "sos/pm/apc string",
[STATE_UTF8_COLLECT_1] = "UTF8 collect (1 left)",
[STATE_UTF8_COLLECT_2] = "UTF8 collect (2 left)",
[STATE_UTF8_COLLECT_3] = "UTF8 collect (3 left)",
[STATE_UTF8_21] = "UTF8 2-byte 1/2",
[STATE_UTF8_31] = "UTF8 3-byte 1/3",
[STATE_UTF8_32] = "UTF8 3-byte 2/3",
};
#endif
@ -503,18 +506,8 @@ action_put(struct terminal *term, uint8_t c)
}
static void
action_utf8_entry(struct terminal *term, uint8_t c)
action_utf8_print(struct terminal *term, wchar_t wc)
{
term->vt.utf8.data[0] = c;
term->vt.utf8.idx = 1;
}
static void
action_utf8_print(struct terminal *term, uint8_t c)
{
wchar_t wc = 0;
mbtowc(&wc, (const char *)term->vt.utf8.data, term->vt.utf8.idx);
int width = wcwidth(wc);
/*
@ -667,6 +660,72 @@ action_utf8_print(struct terminal *term, uint8_t c)
term_print(term, wc, width);
}
static void
action_utf8_21(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 0x1f) << 6) | (utf8[1] & 0x3f)
term->vt.utf8 = (c & 0x1f) << 6;
}
static void
action_utf8_22(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 0x1f) << 6) | (utf8[1] & 0x3f)
term->vt.utf8 |= c & 0x3f;
action_utf8_print(term, term->vt.utf8);
}
static void
action_utf8_31(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 0xf) << 12) | ((utf8[1] & 0x3f) << 6) | (utf8[2] & 0x3f)
term->vt.utf8 = (c & 0x0f) << 12;
}
static void
action_utf8_32(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 0xf) << 12) | ((utf8[1] & 0x3f) << 6) | (utf8[2] & 0x3f)
term->vt.utf8 |= (c & 0x3f) << 6;
}
static void
action_utf8_33(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 0xf) << 12) | ((utf8[1] & 0x3f) << 6) | (utf8[2] & 0x3f)
term->vt.utf8 |= c & 0x3f;
action_utf8_print(term, term->vt.utf8);
}
static void
action_utf8_41(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 7) << 18) | ((utf8[1] & 0x3f) << 12) | ((utf8[2] & 0x3f) << 6) | (utf8[3] & 0x3f);
term->vt.utf8 = (c & 0x07) << 18;
}
static void
action_utf8_42(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 7) << 18) | ((utf8[1] & 0x3f) << 12) | ((utf8[2] & 0x3f) << 6) | (utf8[3] & 0x3f);
term->vt.utf8 |= (c & 0x3f) << 12;
}
static void
action_utf8_43(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 7) << 18) | ((utf8[1] & 0x3f) << 12) | ((utf8[2] & 0x3f) << 6) | (utf8[3] & 0x3f);
term->vt.utf8 |= (c & 0x3f) << 6;
}
static void
action_utf8_44(struct terminal *term, uint8_t c)
{
// wc = ((utf8[0] & 7) << 18) | ((utf8[1] & 0x3f) << 12) | ((utf8[2] & 0x3f) << 6) | (utf8[3] & 0x3f);
term->vt.utf8 |= c & 0x3f;
action_utf8_print(term, term->vt.utf8);
}
static enum state
state_ground_switch(struct terminal *term, uint8_t data)
{
@ -678,9 +737,9 @@ state_ground_switch(struct terminal *term, uint8_t data)
case 0x20 ... 0x7f: action_print(term, data); return STATE_GROUND;
case 0xc0 ... 0xdf: action_utf8_entry(term, data); return STATE_UTF8_COLLECT_1;
case 0xe0 ... 0xef: action_utf8_entry(term, data); return STATE_UTF8_COLLECT_2;
case 0xf0 ... 0xf7: action_utf8_entry(term, data); return STATE_UTF8_COLLECT_3;
case 0xc2 ... 0xdf: action_utf8_21(term, data); return STATE_UTF8_21;
case 0xe0 ... 0xef: action_utf8_31(term, data); return STATE_UTF8_31;
case 0xf0 ... 0xf4: action_utf8_41(term, data); return STATE_UTF8_41;
/* Anywhere */
case 0x18: action_execute(term, data); return STATE_GROUND;
@ -1129,25 +1188,63 @@ state_sos_pm_apc_string_switch(struct terminal *term, uint8_t data)
}
static enum state
state_utf8_collect_1_switch(struct terminal *term, uint8_t data)
state_utf8_21_switch(struct terminal *term, uint8_t data)
{
term->vt.utf8.data[term->vt.utf8.idx++] = data;
action_utf8_print(term, data);
return STATE_GROUND;
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_22(term, data); return STATE_GROUND;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
static enum state
state_utf8_collect_2_switch(struct terminal *term, uint8_t data)
state_utf8_31_switch(struct terminal *term, uint8_t data)
{
term->vt.utf8.data[term->vt.utf8.idx++] = data;
return STATE_UTF8_COLLECT_1;
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_32(term, data); return STATE_UTF8_32;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
static enum state
state_utf8_collect_3_switch(struct terminal *term, uint8_t data)
state_utf8_32_switch(struct terminal *term, uint8_t data)
{
term->vt.utf8.data[term->vt.utf8.idx++] = data;
return STATE_UTF8_COLLECT_2;
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_33(term, data); return STATE_GROUND;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
static enum state
state_utf8_41_switch(struct terminal *term, uint8_t data)
{
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_42(term, data); return STATE_UTF8_42;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
static enum state
state_utf8_42_switch(struct terminal *term, uint8_t data)
{
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_43(term, data); return STATE_UTF8_43;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
static enum state
state_utf8_43_switch(struct terminal *term, uint8_t data)
{
switch (data) {
/* exit current enter new state */
case 0x80 ... 0xbf: action_utf8_44(term, data); return STATE_GROUND;
default: action_utf8_print(term, 0); return STATE_GROUND;
}
}
void
@ -1173,9 +1270,12 @@ vt_from_slave(struct terminal *term, const uint8_t *data, size_t len)
case STATE_DCS_PASSTHROUGH: current_state = state_dcs_passthrough_switch(term, *p); break;
case STATE_SOS_PM_APC_STRING: current_state = state_sos_pm_apc_string_switch(term, *p); break;
case STATE_UTF8_COLLECT_1: current_state = state_utf8_collect_1_switch(term, *p); break;
case STATE_UTF8_COLLECT_2: current_state = state_utf8_collect_2_switch(term, *p); break;
case STATE_UTF8_COLLECT_3: current_state = state_utf8_collect_3_switch(term, *p); break;
case STATE_UTF8_21: current_state = state_utf8_21_switch(term, *p); break;
case STATE_UTF8_31: current_state = state_utf8_31_switch(term, *p); break;
case STATE_UTF8_32: current_state = state_utf8_32_switch(term, *p); break;
case STATE_UTF8_41: current_state = state_utf8_41_switch(term, *p); break;
case STATE_UTF8_42: current_state = state_utf8_42_switch(term, *p); break;
case STATE_UTF8_43: current_state = state_utf8_43_switch(term, *p); break;
}
}