1// Copyright 2011 Google Inc.
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met:
7//
8// * Redistributions of source code must retain the above copyright
9//   notice, this list of conditions and the following disclaimer.
10// * Redistributions in binary form must reproduce the above copyright
11//   notice, this list of conditions and the following disclaimer in the
12//   documentation and/or other materials provided with the distribution.
13// * Neither the name of Google Inc. nor the names of its contributors
14//   may be used to endorse or promote products derived from this software
15//   without specific prior written permission.
16//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29#include <cassert>
30
31#include <lua.hpp>
32
33#include "c_gate.hpp"
34#include "exceptions.hpp"
35#include "state.ipp"
36
37
38/// Constructs a new error with a plain-text message.
39///
40/// \param message The plain-text error message.
41lutok::error::error(const std::string& message) :
42    std::runtime_error(message)
43{
44}
45
46
47/// Destructor for the error.
48lutok::error::~error(void) throw()
49{
50}
51
52
53/// Constructs a new error.
54///
55/// \param api_function_ The name of the API function that caused the error.
56/// \param message The plain-text error message provided by Lua.
57lutok::api_error::api_error(const std::string& api_function_,
58                            const std::string& message) :
59    error(message),
60    _api_function(api_function_)
61{
62}
63
64
65/// Destructor for the error.
66lutok::api_error::~api_error(void) throw()
67{
68}
69
70
71/// Constructs a new api_error with the message on the top of the Lua stack.
72///
73/// \pre There is an error message on the top of the stack.
74/// \post The error message is popped from the stack.
75///
76/// \param state_ The Lua state.
77/// \param api_function_ The name of the Lua API function that caused the error.
78///
79/// \return A new api_error with the popped message.
80lutok::api_error
81lutok::api_error::from_stack(state& state_, const std::string& api_function_)
82{
83    lua_State* raw_state = lutok::state_c_gate(state_).c_state();
84
85    assert(lua_isstring(raw_state, -1));
86    const std::string message = lua_tostring(raw_state, -1);
87    lua_pop(raw_state, 1);
88    return lutok::api_error(api_function_, message);
89}
90
91
92/// Gets the name of the Lua API function that caused this error.
93///
94/// \return The name of the function.
95const std::string&
96lutok::api_error::api_function(void) const
97{
98    return _api_function;
99}
100
101
102/// Constructs a new error.
103///
104/// \param filename_ The file that count not be found.
105lutok::file_not_found_error::file_not_found_error(
106    const std::string& filename_) :
107    error("File '" + filename_ + "' not found"),
108    _filename(filename_)
109{
110}
111
112
113/// Destructor for the error.
114lutok::file_not_found_error::~file_not_found_error(void) throw()
115{
116}
117
118
119/// Gets the name of the file that could not be found.
120///
121/// \return The name of the file.
122const std::string&
123lutok::file_not_found_error::filename(void) const
124{
125    return _filename;
126}
127