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#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include <uniso.h>
#define MODULE_NAME "uniso"
#ifndef VERSION
#define VERSION "unknown version"
#endif
struct l_uniso_context {
lua_State *L;
int callback_ref;
};
static void l_callback(size_t current, size_t total, const char *filename,
void *userdata)
{
struct l_uniso_context *ctx = (struct l_uniso_context *)userdata;
lua_State *L = ctx->L;
lua_rawgeti(L, LUA_REGISTRYINDEX, ctx->callback_ref);
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
return;
}
lua_pushnumber(L, current);
lua_pushnumber(L, total);
lua_pushstring(L, filename);
lua_call(L, 3, 0);
}
static int l_uniso(lua_State *L)
{
int fd, result;
struct l_uniso_context ctx;
const char *filename = NULL;
if (lua_isnumber(L, 1)) {
fd =luaL_checkinteger(L, 1);
} else if (lua_isstring(L, 1)) {
filename = luaL_checkstring(L, 1);
fd = open(filename, O_RDONLY);
if (fd < 0) {
lua_pushnil(L);
lua_pushstring(L, strerror(errno));
return 2;
}
} else {
luaL_typerror(L, 1, "integer or string");
}
if (!lua_isnil(L, 2))
luaL_checktype(L, 2, LUA_TFUNCTION);
ctx.callback_ref = luaL_ref(L, LUA_REGISTRYINDEX);
ctx.L = L;
result = uniso(fd, &l_callback, &ctx);
if (filename != NULL)
close(fd);
lua_pushinteger(L, result);
return 1;
}
static const luaL_reg methods[] = {
{"uniso", l_uniso},
{NULL, NULL},
};
LUALIB_API int luaopen_uniso(lua_State *L)
{
luaL_openlib(L, MODULE_NAME, methods, 0);
lua_pushliteral(L, "version");
lua_pushliteral(L, VERSION);
lua_settable(L, -3);
return 1;
}
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