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database.c
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database.c
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#include <fcntl.h>
#include <unistd.h>
#include "lua-geoip.h"
#include "database.h"
int luageoip_common_open_db(
lua_State * L,
const luaL_Reg * M,
int default_type,
int default_flags,
const char * mt_name,
unsigned int bad_flags,
size_t num_allowed_types,
const int * allowed_types
)
{
/* First argument is checked later */
int flags = luaL_optint(L, 2, default_flags);
int charset = luaL_optint(L, 3, GEOIP_CHARSET_UTF8);
GeoIP * pGeoIP = NULL;
luageoip_DB * pResult = NULL;
int error_reported = 0;
if (bad_flags && (flags & bad_flags) == bad_flags)
{
/* TODO: Or is it concrete DB file problem? */
return luaL_error(
L,
"%s error: can't open db with these flags",
mt_name
);
}
if (lua_isnoneornil(L, 1))
{
pGeoIP = GeoIP_open_type(default_type, flags);
}
else
{
const char * filename = luaL_checkstring(L, 1);
pGeoIP = GeoIP_open(filename, flags);
}
if (pGeoIP)
{
int type = GeoIP_database_edition(pGeoIP);
int found = 0;
size_t i = 0;
for (i = 0; i < num_allowed_types; ++i)
{
if (type == allowed_types[i])
{
found = 1;
break;
}
}
if (!found)
{
lua_pushnil(L);
lua_pushfstring(
L,
"%s error: unexpected db type in that file (%s)",
mt_name,
GeoIP_database_info(pGeoIP)
);
error_reported = 1;
GeoIP_delete(pGeoIP);
pGeoIP = NULL;
}
}
if (pGeoIP == NULL)
{
if (!error_reported)
{
lua_pushnil(L);
lua_pushfstring(
L,
"%s error: failed to open database file",
mt_name
);
error_reported = 1;
}
return 2; /* nil and error message already on stack */
}
GeoIP_set_charset(pGeoIP, charset);
pResult = (luageoip_DB *)lua_newuserdata(L, sizeof(luageoip_DB));
pResult->pGeoIP = pGeoIP;
if (luaL_newmetatable(L, mt_name))
{
#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 502
luaL_register(L, NULL, M);
#else
luaL_setfuncs(L, M, 0);
#endif
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
}
lua_setmetatable(L, -2);
return 1;
}