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Simplify UTF-8 states down into one state.

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This commit is contained in:
nicm 2018-01-12 16:32:12 +00:00
parent f32fd2df69
commit c03565611e
1 changed files with 23 additions and 99 deletions
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122
input.c
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@ -85,6 +85,7 @@ struct input_ctx {
u_int param_list_len;
struct utf8_data utf8data;
int utf8started;
int ch;
int last;
@ -146,9 +147,7 @@ static void input_csi_dispatch_sgr_256(struct input_ctx *, int, u_int *);
static void input_csi_dispatch_sgr_rgb(struct input_ctx *, int, u_int *);
static void input_csi_dispatch_sgr(struct input_ctx *);
static int input_dcs_dispatch(struct input_ctx *);
static int input_utf8_open(struct input_ctx *);
static int input_utf8_add(struct input_ctx *);
static int input_utf8_close(struct input_ctx *);
static int input_top_bit_set(struct input_ctx *);
/* Command table comparison function. */
static int input_table_compare(const void *, const void *);
@ -314,9 +313,6 @@ static const struct input_transition input_state_osc_string_table[];
static const struct input_transition input_state_apc_string_table[];
static const struct input_transition input_state_rename_string_table[];
static const struct input_transition input_state_consume_st_table[];
static const struct input_transition input_state_utf8_three_table[];
static const struct input_transition input_state_utf8_two_table[];
static const struct input_transition input_state_utf8_one_table[];
/* ground state definition. */
static const struct input_state input_state_ground = {
@ -437,27 +433,6 @@ static const struct input_state input_state_consume_st = {
input_state_consume_st_table
};
/* utf8_three state definition. */
static const struct input_state input_state_utf8_three = {
"utf8_three",
NULL, NULL,
input_state_utf8_three_table
};
/* utf8_two state definition. */
static const struct input_state input_state_utf8_two = {
"utf8_two",
NULL, NULL,
input_state_utf8_two_table
};
/* utf8_one state definition. */
static const struct input_state input_state_utf8_one = {
"utf8_one",
NULL, NULL,
input_state_utf8_one_table
};
/* ground state table. */
static const struct input_transition input_state_ground_table[] = {
INPUT_STATE_ANYWHERE,
@ -467,11 +442,7 @@ static const struct input_transition input_state_ground_table[] = {
{ 0x1c, 0x1f, input_c0_dispatch, NULL },
{ 0x20, 0x7e, input_print, NULL },
{ 0x7f, 0x7f, NULL, NULL },
{ 0x80, 0xc1, NULL, NULL },
{ 0xc2, 0xdf, input_utf8_open, &input_state_utf8_one },
{ 0xe0, 0xef, input_utf8_open, &input_state_utf8_two },
{ 0xf0, 0xf4, input_utf8_open, &input_state_utf8_three },
{ 0xf5, 0xff, NULL, NULL },
{ 0x80, 0xff, input_top_bit_set, NULL },
{ -1, -1, NULL, NULL }
};
@ -717,39 +688,6 @@ static const struct input_transition input_state_consume_st_table[] = {
{ -1, -1, NULL, NULL }
};
/* utf8_three state table. */
static const struct input_transition input_state_utf8_three_table[] = {
/* No INPUT_STATE_ANYWHERE */
{ 0x00, 0x7f, NULL, &input_state_ground },
{ 0x80, 0xbf, input_utf8_add, &input_state_utf8_two },
{ 0xc0, 0xff, NULL, &input_state_ground },
{ -1, -1, NULL, NULL }
};
/* utf8_two state table. */
static const struct input_transition input_state_utf8_two_table[] = {
/* No INPUT_STATE_ANYWHERE */
{ 0x00, 0x7f, NULL, &input_state_ground },
{ 0x80, 0xbf, input_utf8_add, &input_state_utf8_one },
{ 0xc0, 0xff, NULL, &input_state_ground },
{ -1, -1, NULL, NULL }
};
/* utf8_one state table. */
static const struct input_transition input_state_utf8_one_table[] = {
/* No INPUT_STATE_ANYWHERE */
{ 0x00, 0x7f, NULL, &input_state_ground },
{ 0x80, 0xbf, input_utf8_close, &input_state_ground },
{ 0xc0, 0xff, NULL, &input_state_ground },
{ -1, -1, NULL, NULL }
};
/* Input table compare. */
static int
input_table_compare(const void *key, const void *value)
@ -1059,6 +997,8 @@ input_print(struct input_ctx *ictx)
{
int set;
ictx->utf8started = 0; /* can't be valid UTF-8 */
set = ictx->cell.set == 0 ? ictx->cell.g0set : ictx->cell.g1set;
if (set == 1)
ictx->cell.cell.attr |= GRID_ATTR_CHARSET;
@ -1132,6 +1072,8 @@ input_c0_dispatch(struct input_ctx *ictx)
struct window_pane *wp = ictx->wp;
struct screen *s = sctx->s;
ictx->utf8started = 0; /* can't be valid UTF-8 */
log_debug("%s: '%c'", __func__, ictx->ch);
switch (ictx->ch) {
@ -2064,48 +2006,30 @@ input_exit_rename(struct input_ctx *ictx)
/* Open UTF-8 character. */
static int
input_utf8_open(struct input_ctx *ictx)
input_top_bit_set(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
if (utf8_open(ud, ictx->ch) != UTF8_MORE)
fatalx("UTF-8 open invalid %#x", ictx->ch);
log_debug("%s %hhu", __func__, ud->size);
ictx->last = -1;
return (0);
}
/* Append to UTF-8 character. */
static int
input_utf8_add(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
if (utf8_append(ud, ictx->ch) != UTF8_MORE)
fatalx("UTF-8 add invalid %#x", ictx->ch);
log_debug("%s", __func__);
return (0);
}
/* Close UTF-8 string. */
static int
input_utf8_close(struct input_ctx *ictx)
{
struct utf8_data *ud = &ictx->utf8data;
if (utf8_append(ud, ictx->ch) != UTF8_DONE) {
/*
* An error here could be invalid UTF-8 or it could be a
* nonprintable character for which we can't get the
* width. Drop it.
*/
if (!ictx->utf8started) {
if (utf8_open(ud, ictx->ch) != UTF8_MORE)
return (0);
ictx->utf8started = 1;
return (0);
}
switch (utf8_append(ud, ictx->ch)) {
case UTF8_MORE:
return (0);
case UTF8_ERROR:
ictx->utf8started = 0;
return (0);
case UTF8_DONE:
break;
}
ictx->utf8started = 0;
log_debug("%s %hhu '%*s' (width %hhu)", __func__, ud->size,
(int)ud->size, ud->data, ud->width);