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fix some stuff

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This commit is contained in:
lxsang 2019-05-08 19:47:53 +02:00
parent 55f298d249
commit 6314055d6f
1 changed files with 15 additions and 0 deletions
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15
lib/ffi/ffi.c
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@ -541,6 +541,20 @@ static int l_ffi_byte_at(lua_State* L)
lua_pushnil(L);
return 1;
}
static int l_ffi_byte_at_put(lua_State* L)
{
void* ptr = lua_touserdata(L, 1);
int off = luaL_checkinteger(L,2);
uint8_t v = (uint8_t)luaL_checknumber(L,3);
if(ptr)
{
*((uint8_t*)(ptr + off)) = v;
lua_pushboolean(L,1);
return 1;
}
lua_pushboolean(L,0);
return 1;
}
static int l_ffi_string(lua_State* L)
{
void* ptr = lua_touserdata(L,1);
@ -579,6 +593,7 @@ static const struct luaL_Reg _lib [] = {
{"meta", l_ffi_meta},
{"at", l_ffi_offset},
{"byteAt", l_ffi_byte_at},
{"byteAtPut", l_ffi_byte_at_put},
// special case: pointer to string
{"string", l_ffi_string},
// pointer to byte array