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support colons in SGR character attributes

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Patch by Mikhail Kot <to@myrrc.dev>
With some modifications to behave more like xterm (see note below).

Example:

	printf '\033[48;2;255:0:0mtest\n'

https://invisible-island.net/xterm/ctlseqs/ctlseqs.html

Some notes:

"CSI Pm m  Character Attributes (SGR).
[...]
o   xterm allows either colons (standard) or semicolons
(legacy) to separate the subparameters (but after the
first colon, colons must be used).
This commit is contained in:
Bakkeby 2024-05-02 09:28:20 +02:00
parent 118e965d0c
commit aa5957495d
3 changed files with 6 additions and 3 deletions
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5
st.c
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@ -1498,6 +1498,7 @@ csiparse(void)
{
char *p = csiescseq.buf, *np;
long int v;
int sep = ';'; /* colon or semi-colon, but not both */
csiescseq.narg = 0;
if (*p == '?') {
@ -1518,7 +1519,9 @@ csiparse(void)
#if UNDERCURL_PATCH
readcolonargs(&p, csiescseq.narg-1, csiescseq.carg);
#endif // UNDERCURL_PATCH
if (*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
if (sep == ';' && *p == ':')
sep = ':'; /* allow override to colon once */
if (*p != sep || csiescseq.narg == ESC_ARG_SIZ)
break;
p++;
}