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avoid going out bounds on llInsertString. Thx Tampa

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This commit is contained in:
UbitUmarov
2026-01-13 02:39:43 +00:00
parent afd5b34b8a
commit 9132b1c982
1 changed files with 8 additions and 4 deletions
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12
OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
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@@ -3161,19 +3161,23 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
// this is actually wrong. according to SL wiki, this function should not support negative indexes.
public LSL_String llInsertString(string dest, int index, string src)
{
if(string.IsNullOrEmpty(src))
return dest;
// Normalize indices (if negative).
// After normalization they may still be
// negative, but that is now relative to
// the start, rather than the end, of the
// sequence.
char c;
if (index < 0)
{
index = dest.Length+index;
index = dest.Length + index;
// Negative now means it is less than the lower
// bound of the string.
if(index > 0)
if(index >= 0 && index < dest.Length)
{
c = dest[index];
if (c >= 0xDC00 && c <= 0xDFFF)
@@ -3182,11 +3186,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
if (index < 0)
{
return src+dest;
return src + dest;
}
}
else
else if(index < dest.Length)
{
c = dest[index];
if (c >= 0xDC00 && c <= 0xDFFF)