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util.encodings: Expose UTF-8 validation and length checking functions

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This commit is contained in:
Kim Alvefur 2015-03-23 14:27:30 +01:00
parent 7bf2c14e9f
commit b9f798f83a
1 changed files with 28 additions and 0 deletions
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28
util-src/encodings.c
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@ -175,6 +175,29 @@ const char* check_utf8 (lua_State *L, int idx, size_t *l) {
return s;
}
static int Lutf8_valid(lua_State *L) {
lua_pushboolean(L, check_utf8(L, 1, NULL) != NULL);
return 1;
}
static int Lutf8_length(lua_State *L) {
size_t len;
if(!check_utf8(L, 1, &len)) {
lua_pushnil(L);
lua_pushliteral(L, "invalid utf8");
return 2;
}
lua_pushinteger(L, len);
return 1;
}
static const luaL_Reg Reg_utf8[] =
{
{ "valid", Lutf8_valid },
{ "length", Lutf8_length },
{ NULL, NULL }
};
/***************** STRINGPREP *****************/
#ifdef USE_STRINGPREP_ICU
@ -452,6 +475,11 @@ LUALIB_API int luaopen_util_encodings(lua_State *L)
luaL_register(L, NULL, Reg_idna);
lua_settable(L,-3);
lua_pushliteral(L, "utf8");
lua_newtable(L);
luaL_register(L, NULL, Reg_utf8);
lua_settable(L, -3);
lua_pushliteral(L, "version"); /** version */
lua_pushliteral(L, "-3.14");
lua_settable(L,-3);