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      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.
     41 lutok::error::error(const std::string& message) :
     42     std::runtime_error(message)
     43 {
     44 }
     45 
     46 
     47 /// Destructor for the error.
     48 lutok::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.
     57 lutok::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.
     66 lutok::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.
     80 lutok::api_error
     81 lutok::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.
     95 const std::string&
     96 lutok::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.
    105 lutok::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.
    114 lutok::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.
    122 const std::string&
    123 lutok::file_not_found_error::filename(void) const
    124 {
    125     return _filename;
    126 }
    127