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/*
* melisma - extensible and scriptable audio engine
* Copyright (C) 2026 Ludvig Gunne Lindström
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <lauxlib.h>
static const char *dirent_typestr(struct dirent *de)
{
switch (de->d_type)
{
case DT_BLK: return "b";
case DT_CHR: return "c";
case DT_DIR: return "d";
case DT_FIFO: return "p";
case DT_REG: return "f";
case DT_LNK: return "l";
case DT_SOCK: return "s";
default: return "?";
}
}
static void push_dirent(lua_State *s, struct dirent *de)
{
lua_newtable(s);
int tbl = lua_gettop(s);
lua_pushstring(s,de->d_name);
lua_setfield(s,tbl,"name");
lua_pushstring(s,dirent_typestr(de));
lua_setfield(s,tbl,"type");
lua_settop(s,tbl);
}
static int l_readdir(lua_State *s)
{
const char *path = luaL_checkstring(s,1);
DIR *dirp = opendir(path);
if (dirp == NULL)
{
luaL_error(s,strerror(errno));
}
lua_newtable(s);
int tbl = lua_gettop(s);
int i = 1;
struct dirent *de;
while ((de = readdir(dirp)) != NULL)
{
push_dirent(s,de);
lua_rawseti(s,tbl,i++);
}
closedir(dirp);
lua_settop(s,tbl);
return 1;
}
int luaopen_melisma_fs(lua_State *s)
{
/*** File system utilities.
@module fs
*/
lua_newtable(s);
int tbl = lua_gettop(s);
/*** List directory contents.
@function readdir
@tparam string path Directory path.
@treturn table Directory contents.
@usage
local fs = require 'melisma.fs'
local contents = fs.readdir('.')
for _,entry in ipairs(contents) do
print(entry.name, entry.type)
end
*/
lua_pushcfunction(s,l_readdir);
lua_setfield(s,tbl,"readdir");
lua_settop(s,tbl);
return 1;
}
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