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Replace invalid UTF-8 with the placeholder instead of ignoring them

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(this is what most terminals do), GitHub issue 4514.
This commit is contained in:
nicm
2025-08-12 12:33:05 +00:00
parent 06c84dba59
commit 3ae0d560be
1 changed files with 19 additions and 5 deletions
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24
input.c
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@ -747,6 +747,20 @@ input_table_compare(const void *key, const void *value)
return (strcmp(ictx->interm_buf, entry->interm));
}
/* Stop UTF-8 and enter an invalid character. */
static void
input_stop_utf8(struct input_ctx *ictx)
{
struct screen_write_ctx *sctx = &ictx->ctx;
static struct utf8_data rc = { "\357\277\275", 3, 3, 1 };
if (ictx->utf8started) {
utf8_copy(&ictx->cell.cell.data, &rc);
screen_write_collect_add(sctx, &ictx->cell.cell);
}
ictx->utf8started = 0;
}
/*
* Timer - if this expires then have been waiting for a terminator for too
* long, so reset to ground.
@ -1144,7 +1158,7 @@ input_print(struct input_ctx *ictx)
struct screen_write_ctx *sctx = &ictx->ctx;
int set;
ictx->utf8started = 0; /* can't be valid UTF-8 */
input_stop_utf8(ictx); /* can't be valid UTF-8 */
set = ictx->cell.set == 0 ? ictx->cell.g0set : ictx->cell.g1set;
if (set == 1)
@ -1224,7 +1238,7 @@ input_c0_dispatch(struct input_ctx *ictx)
u_int width;
int has_content = 0;
ictx->utf8started = 0; /* can't be valid UTF-8 */
input_stop_utf8(ictx); /* can't be valid UTF-8 */
log_debug("%s: '%c'", __func__, ictx->ch);
@ -2551,9 +2565,9 @@ input_top_bit_set(struct input_ctx *ictx)
ictx->flags &= ~INPUT_LAST;
if (!ictx->utf8started) {
if (utf8_open(ud, ictx->ch) != UTF8_MORE)
return (0);
ictx->utf8started = 1;
if (utf8_open(ud, ictx->ch) != UTF8_MORE)
input_stop_utf8(ictx);
return (0);
}
@ -2561,7 +2575,7 @@ input_top_bit_set(struct input_ctx *ictx)
case UTF8_MORE:
return (0);
case UTF8_ERROR:
ictx->utf8started = 0;
input_stop_utf8(ictx);
return (0);
case UTF8_DONE:
break;