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Add a variant of love.data.pack which takes an existing ByteData object.

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#1594
This commit is contained in:
Sasha Szpakowski
2023-02-19 22:15:07 -04:00
parent 1909e80409
commit bec488519d
1 changed files with 22 additions and 0 deletions
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src/modules/data/wrap_DataModule.cpp
+22
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@@ -326,6 +326,28 @@ int w_hash(lua_State *L)
int w_pack(lua_State *L)
{
if (luax_istype(L, 1, ByteData::type))
{
ByteData *d = luax_checkbytedata(L, 1);
size_t offset = (size_t) luaL_checknumber(L, 2);
const char *fmt = luaL_checkstring(L, 3);
luaL_Buffer_53 b;
lua53_str_pack(L, fmt, 4, &b);
if (offset + b.nelems > d->getSize())
{
lua53_cleanupbuffer(&b);
return luaL_error(L, "The given byte offset and pack format parameters do not fit within the ByteData's size.");
}
memcpy((uint8 *) d->getData() + offset, b.ptr, b.nelems);
lua53_cleanupbuffer(&b);
luax_pushtype(L, Data::type, d);
return 1;
}
ContainerType ctype = luax_checkcontainertype(L, 1);
const char *fmt = luaL_checkstring(L, 2);
luaL_Buffer_53 b;