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CLuaInstance: Add strFind() and strSub() functions

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- These functions are possible substitutes for the
  Lua functions string.find() and string.sub()

- This Lua functions have problems e.g. with the contents
  of some websites.
This commit is contained in:
M. Liebmann
2014-09-10 21:13:38 +02:00
parent b6f1963f2c
commit 51fb2fb9e7
2 changed files with 61 additions and 0 deletions
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58
src/gui/luainstance.cpp
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@@ -447,6 +447,8 @@ const luaL_Reg CLuaInstance::methods[] =
{ "GetLanguage", CLuaInstance::GetLanguage },
{ "runScript", CLuaInstance::runScriptExt },
{ "PlayFile", CLuaInstance::PlayFile },
{ "strFind", CLuaInstance::strFind },
{ "strSub", CLuaInstance::strSub },
{ NULL, NULL }
};
@@ -632,6 +634,62 @@ int CLuaInstance::PlayFile(lua_State *L)
return 0;
}
int CLuaInstance::strFind(lua_State *L)
{
int numargs = lua_gettop(L);
if (numargs < 3) {
printf("CLuaInstance::%s: not enough arguments (%d, expected 2 (or 3 or 4))\n", __func__, numargs);
lua_pushnil(L);
return 1;
}
const char *s1;
const char *s2;
int pos=0, n=0, ret=0;
s1 = luaL_checkstring(L, 2);
s2 = luaL_checkstring(L, 3);
if (numargs > 3)
pos = luaL_checkint(L, 4);
if (numargs > 4)
n = luaL_checkint(L, 5);
std::string str(s1);
if (numargs > 4)
ret = str.find(s2, pos, n);
else
ret = str.find(s2, pos);
// printf("####[%s:%d] str_len: %d, s2: %s, pos: %d, n: %d, ret: %d\n", __func__, __LINE__, str.length(), s2, pos, n, ret);
if (ret == (int)std::string::npos)
lua_pushnil(L);
else
lua_pushinteger(L, ret);
return 1;
}
int CLuaInstance::strSub(lua_State *L)
{
int numargs = lua_gettop(L);
if (numargs < 3) {
printf("CLuaInstance::%s: not enough arguments (%d, expected 2 (or 3))\n", __func__, numargs);
lua_pushstring(L, "");
return 1;
}
const char *s1;
int pos=0, len=std::string::npos;
std::string ret="";
s1 = luaL_checkstring(L, 2);
pos = luaL_checkint(L, 3);
if (numargs > 3)
len = luaL_checkint(L, 4);
std::string str(s1);
ret = str.substr(pos, len);
// printf("####[%s:%d] str_len: %d, pos: %d, len: %d, ret_len: %d\n", __func__, __LINE__, str.length(), pos, len, ret.length());
lua_pushstring(L, ret.c_str());
return 1;
}
int CLuaInstance::GetSize(lua_State *L)
{
DBG("CLuaInstance::%s %d\n", __func__, lua_gettop(L));