external/bsd/lutok/dist/exceptions.cpp

   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
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  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 }