DGNum/ubus
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lua: avoid truncation of large numeric values

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If the Lua number exceeds the maximum value representable by an
unsigned 32bit integer, store it in an unsigned 64bit integer
field instead.

Signed-off-by: Alin Nastac <alin.nastac@gmail.com>
[align code style, reword commit message]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Alin Nastac 2020-02-03 13:58:04 +01:00 • committed by Jo-Philipp Wich
parent d35df8adda
commit 171469e313
1 changed files with 4 additions and 1 deletions
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5
lua/ubus.c
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@ -196,7 +196,10 @@ ubus_lua_format_blob(lua_State *L, struct blob_buf *b, bool table)
case LUA_TINT:
#endif
case LUA_TNUMBER:
blobmsg_add_u32(b, key, (uint32_t)lua_tointeger(L, -1));
if ((uint64_t)lua_tonumber(L, -1) > INT_MAX)
blobmsg_add_u64(b, key, (uint64_t)lua_tonumber(L, -1));
else
blobmsg_add_u32(b, key, (uint32_t)lua_tointeger(L, -1));
break;
case LUA_TSTRING: