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feat(lua): add vim.iconv (#18286)

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Co-authored-by: Justin M. Keyes <justinkz@gmail.com>
This commit is contained in:
Lewis Russell
2022-08-24 14:41:31 +01:00
committed by GitHub
parent 9be4bfc5f4
commit b1eaa2b9a3
3 changed files with 102 additions and 0 deletions
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53
src/nvim/lua/stdlib.c
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@@ -474,6 +474,52 @@ static int nlua_stricmp(lua_State *const lstate) FUNC_ATTR_NONNULL_ALL
return 1;
}
#if defined(HAVE_ICONV)
/// Convert string from one encoding to another
static int nlua_iconv(lua_State *lstate)
{
int narg = lua_gettop(lstate);
if (narg < 3) {
return luaL_error(lstate, "Expected at least 3 arguments");
}
for (int i = 1; i <= 3; i++) {
if (lua_type(lstate, i) != LUA_TSTRING) {
return luaL_argerror(lstate, i, "expected string");
}
}
size_t str_len = 0;
const char *str = lua_tolstring(lstate, 1, &str_len);
char_u *from = enc_canonize(enc_skip((char_u *)lua_tolstring(lstate, 2, NULL)));
char_u *to = enc_canonize(enc_skip((char_u *)lua_tolstring(lstate, 3, NULL)));
vimconv_T vimconv;
vimconv.vc_type = CONV_NONE;
convert_setup_ext(&vimconv, from, false, to, false);
char_u *ret = string_convert(&vimconv, (char_u *)str, &str_len);
convert_setup(&vimconv, NULL, NULL);
xfree(from);
xfree(to);
if (ret == NULL) {
lua_pushnil(lstate);
} else {
lua_pushlstring(lstate, (char *)ret, str_len);
xfree(ret);
}
return 1;
}
#endif
void nlua_state_add_stdlib(lua_State *const lstate, bool is_thread)
{
if (!is_thread) {
@@ -519,6 +565,13 @@ void nlua_state_add_stdlib(lua_State *const lstate, bool is_thread)
// vim.spell
luaopen_spell(lstate);
lua_setfield(lstate, -2, "spell");
#if defined(HAVE_ICONV)
// vim.iconv
// depends on p_ambw, p_emoji
lua_pushcfunction(lstate, &nlua_iconv);
lua_setfield(lstate, -2, "iconv");
#endif
}
// vim.mpack