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jinx-mod.c
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/* Jinx bindings to libenchant
Copyright (C) 2023-2025 Free Software Foundation, Inc.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include <emacs-module.h>
#include <enchant.h>
#include <stdlib.h>
#include <string.h>
#define jinx_unused(var) _##var __attribute__((unused))
#define jinx_autofree __attribute__((cleanup(jinx_autofree_cleanup)))
int plugin_is_GPL_compatible;
static EnchantBroker* broker = 0;
static emacs_value Qt, Qnil, Qcons;
static EnchantBroker* jinx_broker(void) {
return broker ? broker : (broker = enchant_broker_init());
}
static void jinx_autofree_cleanup(char **p) {
free(*(void**)p);
}
static emacs_value jinx_str(emacs_env* env, const char* str) {
return env->make_string(env, str, strlen(str));
}
static emacs_value jinx_cons(emacs_env* env, emacs_value a, emacs_value b) {
return env->funcall(env, Qcons, 2, (emacs_value[]){a, b});
}
static char* jinx_cstr(emacs_env* env, emacs_value val) {
ptrdiff_t size = 0;
if (!env->copy_string_contents(env, val, 0, &size))
return 0;
char* str = malloc(size);
if (!str) {
env->non_local_exit_signal(env,
env->intern(env, "memory-full"),
Qnil);
return 0;
}
if (!env->copy_string_contents(env, val, str, &size)) {
free(str);
return 0;
}
return str;
}
static void jinx_defun(emacs_env* env, const char* name,
ptrdiff_t min, ptrdiff_t max, void* fun) {
env->funcall(env, env->intern(env, "defalias"), 2,
(emacs_value[]){
env->intern(env, name),
env->make_function(env, min, max, fun, 0, 0)
});
}
static void jinx_free_dict(void* dict) {
enchant_broker_free_dict(broker, dict);
}
static emacs_value jinx_dict(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
jinx_autofree char* str = jinx_cstr(env, args[0]);
EnchantDict* dict =
str ? enchant_broker_request_dict(jinx_broker(), str) : 0;
return dict
? env->make_user_ptr(env, jinx_free_dict, dict)
: Qnil;
}
static void jinx_describe_cb(const char* const lang_tag,
const char* const provider_name,
const char* const jinx_unused(provider_desc),
const char* const jinx_unused(provider_file),
void* data) {
emacs_env* env = ((emacs_env**)data)[0];
((emacs_value*)data)[1] = jinx_cons(env,
jinx_str(env, lang_tag),
jinx_str(env, provider_name));
}
static emacs_value jinx_describe(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
EnchantDict* dict = env->get_user_ptr(env, args[0]);
if (!dict)
return Qnil;
void* data[] = { env, 0 };
enchant_dict_describe(dict, jinx_describe_cb, data);
return data[1];
}
static void jinx_langs_cb(const char* const lang_tag,
const char* const provider_name,
const char* const jinx_unused(provider_desc),
const char* const jinx_unused(provider_file),
void* data) {
emacs_env* env = ((emacs_env**)data)[0];
((emacs_value*)data)[1] = jinx_cons(env,
jinx_cons(env,
jinx_str(env, lang_tag),
jinx_str(env, provider_name)),
((emacs_value*)data)[1]);
}
static emacs_value jinx_langs(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value jinx_unused(args[]),
void* jinx_unused(data)) {
void* data[] = { env, Qnil };
enchant_broker_list_dicts(jinx_broker(), jinx_langs_cb, data);
return data[1];
}
static emacs_value jinx_check(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
EnchantDict* dict = env->get_user_ptr(env, args[0]);
jinx_autofree char* str = jinx_cstr(env, args[1]);
// Do not error in the checking function (Non-Unicode strings)
env->non_local_exit_clear(env);
return !dict || !str || enchant_dict_check(dict, str, -1) ? Qnil : Qt;
}
static emacs_value jinx_add(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
EnchantDict* dict = env->get_user_ptr(env, args[0]);
jinx_autofree char* str = jinx_cstr(env, args[1]);
if (dict && str)
enchant_dict_add(dict, str, -1);
return Qnil;
}
static emacs_value jinx_wordchars(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
EnchantDict* dict = env->get_user_ptr(env, args[0]);
if (dict) {
// Enchant older than 2.3.1 does not enforce UTF-8 <gh:rrthomas/enchant#278>
emacs_value str = jinx_str(env, enchant_dict_get_extra_word_characters(dict));
if (env->non_local_exit_check(env) == emacs_funcall_exit_return)
return str;
env->non_local_exit_clear(env);
}
return Qnil;
}
static emacs_value jinx_suggest(emacs_env* env, ptrdiff_t jinx_unused(nargs),
emacs_value args[], void* jinx_unused(data)) {
EnchantDict* dict = env->get_user_ptr(env, args[0]);
jinx_autofree char* str = jinx_cstr(env, args[1]);
emacs_value list = Qnil;
size_t count = 0;
char** suggs = str && dict ? enchant_dict_suggest(dict, str, -1, &count) : 0;
if (suggs) {
while (count > 0)
list = jinx_cons(env, jinx_str(env, suggs[--count]), list);
enchant_dict_free_string_list(dict, suggs);
}
return list;
}
int emacs_module_init(struct emacs_runtime *runtime) {
// Require Emacs binary compatibility
if ((size_t)runtime->size < sizeof (*runtime))
return 1;
emacs_env* env = runtime->get_environment(runtime);
if ((size_t)env->size < sizeof (*env))
return 2;
Qt = env->make_global_ref(env, env->intern(env, "t"));
Qnil = env->make_global_ref(env, env->intern(env, "nil"));
Qcons = env->make_global_ref(env, env->intern(env, "cons"));
jinx_defun(env, "jinx--mod-suggest", 2, 2, jinx_suggest);
jinx_defun(env, "jinx--mod-check", 2, 2, jinx_check);
jinx_defun(env, "jinx--mod-add", 2, 2, jinx_add);
jinx_defun(env, "jinx--mod-dict", 1, 1, jinx_dict);
jinx_defun(env, "jinx--mod-langs", 0, 0, jinx_langs);
jinx_defun(env, "jinx--mod-describe", 1, 1, jinx_describe);
jinx_defun(env, "jinx--mod-wordchars", 1, 1, jinx_wordchars);
return 0;
}