Mercurial > hg > orthanc
annotate Core/Lua/LuaContext.cpp @ 768:476febedc516 lua-scripting
improvements
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
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| date | Wed, 23 Apr 2014 17:23:18 +0200 |
| parents | 2d0a347e8cfc |
| children | a811bdf8b8eb |
| rev | line source |
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| 386 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 689 | 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, |
| 386 | 4 * Belgium |
| 5 * | |
| 6 * This program is free software: you can redistribute it and/or | |
| 7 * modify it under the terms of the GNU General Public License as | |
| 8 * published by the Free Software Foundation, either version 3 of the | |
| 9 * License, or (at your option) any later version. | |
| 10 * | |
| 11 * In addition, as a special exception, the copyright holders of this | |
| 12 * program give permission to link the code of its release with the | |
| 13 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
| 14 * that use the same license as the "OpenSSL" library), and distribute | |
| 15 * the linked executables. You must obey the GNU General Public License | |
| 16 * in all respects for all of the code used other than "OpenSSL". If you | |
| 17 * modify file(s) with this exception, you may extend this exception to | |
| 18 * your version of the file(s), but you are not obligated to do so. If | |
| 19 * you do not wish to do so, delete this exception statement from your | |
| 20 * version. If you delete this exception statement from all source files | |
| 21 * in the program, then also delete it here. | |
| 22 * | |
| 23 * This program is distributed in the hope that it will be useful, but | |
| 24 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 26 * General Public License for more details. | |
| 27 * | |
| 28 * You should have received a copy of the GNU General Public License | |
| 29 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 30 **/ | |
| 31 | |
| 32 | |
| 33 #include "LuaContext.h" | |
| 34 | |
| 35 #include <glog/logging.h> | |
| 36 | |
| 37 extern "C" | |
| 38 { | |
| 39 #include <lualib.h> | |
| 40 #include <lauxlib.h> | |
| 41 } | |
| 42 | |
| 43 namespace Orthanc | |
| 44 { | |
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45 int LuaContext::PrintToLog(lua_State *state) |
| 386 | 46 { |
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47 // Get the pointer to the "LuaContext" underlying object |
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48 lua_getglobal(state, "_LuaContext"); |
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49 assert(lua_type(state, -1) == LUA_TLIGHTUSERDATA); |
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50 LuaContext* that = const_cast<LuaContext*>(reinterpret_cast<const LuaContext*>(lua_topointer(state, -1))); |
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51 assert(that != NULL); |
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52 lua_pop(state, 1); |
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53 |
| 386 | 54 // http://medek.wordpress.com/2009/02/03/wrapping-lua-errors-and-print-function/ |
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55 int nArgs = lua_gettop(state); |
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56 lua_getglobal(state, "tostring"); |
| 386 | 57 |
| 58 // Make sure you start at 1 *NOT* 0 for arrays in Lua. | |
| 59 std::string result; | |
| 60 | |
| 61 for (int i = 1; i <= nArgs; i++) | |
| 62 { | |
| 63 const char *s; | |
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64 lua_pushvalue(state, -1); |
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65 lua_pushvalue(state, i); |
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66 lua_call(state, 1, 1); |
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67 s = lua_tostring(state, -1); |
| 386 | 68 |
| 69 if (result.size() > 0) | |
| 70 result.append(", "); | |
| 71 | |
| 72 if (s == NULL) | |
| 73 result.append("<No conversion to string>"); | |
| 74 else | |
| 75 result.append(s); | |
| 76 | |
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77 lua_pop(state, 1); |
| 386 | 78 } |
| 79 | |
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80 LOG(INFO) << "Lua says: " << result; |
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81 that->log_.append(result); |
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82 that->log_.append("\n"); |
| 386 | 83 |
| 84 return 0; | |
| 85 } | |
| 86 | |
| 87 | |
| 88 LuaContext::LuaContext() | |
| 89 { | |
| 90 lua_ = luaL_newstate(); | |
| 91 if (!lua_) | |
| 92 { | |
| 93 throw LuaException("Unable to create the Lua context"); | |
| 94 } | |
| 95 | |
| 96 luaL_openlibs(lua_); | |
| 97 lua_register(lua_, "print", PrintToLog); | |
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98 |
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99 lua_pushlightuserdata(lua_, this); |
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100 lua_setglobal(lua_, "_LuaContext"); |
| 386 | 101 } |
| 102 | |
| 103 | |
| 104 LuaContext::~LuaContext() | |
| 105 { | |
| 106 lua_close(lua_); | |
| 107 } | |
| 108 | |
| 109 | |
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110 void LuaContext::Execute(std::string* output, |
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111 const std::string& command) |
| 386 | 112 { |
| 113 boost::mutex::scoped_lock lock(mutex_); | |
| 114 | |
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115 log_.clear(); |
| 386 | 116 int error = (luaL_loadbuffer(lua_, command.c_str(), command.size(), "line") || |
| 117 lua_pcall(lua_, 0, 0, 0)); | |
| 118 | |
| 119 if (error) | |
| 120 { | |
| 121 assert(lua_gettop(lua_) >= 1); | |
| 122 | |
| 123 std::string description(lua_tostring(lua_, -1)); | |
| 124 lua_pop(lua_, 1); /* pop error message from the stack */ | |
| 125 throw LuaException(description); | |
| 126 } | |
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127 |
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128 if (output != NULL) |
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129 { |
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130 *output = log_; |
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131 } |
| 386 | 132 } |
| 133 | |
| 134 | |
| 135 void LuaContext::Execute(EmbeddedResources::FileResourceId resource) | |
| 136 { | |
| 137 std::string command; | |
| 138 EmbeddedResources::GetFileResource(command, resource); | |
| 139 Execute(command); | |
| 140 } | |
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141 |
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142 |
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143 bool LuaContext::IsExistingFunction(const char* name) |
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144 { |
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145 boost::mutex::scoped_lock lock(mutex_); |
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146 lua_settop(lua_, 0); |
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147 lua_getglobal(lua_, name); |
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148 return lua_type(lua_, -1) == LUA_TFUNCTION; |
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149 } |
| 386 | 150 } |