src/script/squirrel_std.cpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   4  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file squirrel_std.cpp Implements the Squirrel Standard Function class */
   9
  10 #include "../stdafx.h"
  11 #include <squirrel.h>
  12 #include <sqstdmath.h>
  13 #include "../debug.h"
  14 #include "squirrel_std.hpp"
  15 #include "../core/alloc_func.hpp"
  16 #include "../core/math_func.hpp"
  17 #include "../string_func.h"
  18
  19 #include "../safeguards.h"
  20
  21
  22 SQInteger SquirrelStd::min(HSQUIRRELVM vm)
  23 {
  24         SQInteger tmp1, tmp2;
  25
  26         sq_getinteger(vm, 2, &tmp1);
  27         sq_getinteger(vm, 3, &tmp2);
  28         sq_pushinteger(vm, std::min(tmp1, tmp2));
  29         return 1;
  30 }
  31
  32 SQInteger SquirrelStd::max(HSQUIRRELVM vm)
  33 {
  34         SQInteger tmp1, tmp2;
  35
  36         sq_getinteger(vm, 2, &tmp1);
  37         sq_getinteger(vm, 3, &tmp2);
  38         sq_pushinteger(vm, std::max(tmp1, tmp2));
  39         return 1;
  40 }
  41
  42 SQInteger SquirrelStd::require(HSQUIRRELVM vm)
  43 {
  44         SQInteger top = sq_gettop(vm);
  45         const SQChar *filename;
  46
  47         sq_getstring(vm, 2, &filename);
  48
  49         /* Get the script-name of the current file, so we can work relative from it */
  50         SQStackInfos si;
  51         sq_stackinfos(vm, 1, &si);
  52         if (si.source == nullptr) {
  53                 Debug(misc, 0, "[squirrel] Couldn't detect the script-name of the 'require'-caller; this should never happen!");
  54                 return SQ_ERROR;
  55         }
  56
  57         char path[MAX_PATH];
  58         strecpy(path, si.source, lastof(path));
  59         /* Keep the dir, remove the rest */
  60         SQChar *s = strrchr(path, PATHSEPCHAR);
  61         if (s != nullptr) {
  62                 /* Keep the PATHSEPCHAR there, remove the rest */
  63                 s++;
  64                 *s = '\0';
  65         }
  66         strecat(path, filename, lastof(path));
  67 #if (PATHSEPCHAR != '/')
  68         for (char *n = path; *n != '\0'; n++) if (*n == '/') *n = PATHSEPCHAR;
  69 #endif
  70
  71         Squirrel *engine = (Squirrel *)sq_getforeignptr(vm);
  72         bool ret = engine->LoadScript(vm, path);
  73
  74         /* Reset the top, so the stack stays correct */
  75         sq_settop(vm, top);
  76
  77         return ret ? 0 : SQ_ERROR;
  78 }
  79
  80 SQInteger SquirrelStd::notifyallexceptions(HSQUIRRELVM vm)
  81 {
  82         SQBool b;
  83
  84         if (sq_gettop(vm) >= 1) {
  85                 if (SQ_SUCCEEDED(sq_getbool(vm, -1, &b))) {
  86                         sq_notifyallexceptions(vm, b);
  87                         return 0;
  88                 }
  89         }
  90
  91         return SQ_ERROR;
  92 }
  93
  94 void squirrel_register_global_std(Squirrel *engine)
  95 {
  96         /* We don't use squirrel_helper here, as we want to register to the global
  97          *  scope and not to a class. */
  98         engine->AddMethod("require",             &SquirrelStd::require,             2, ".s");
  99         engine->AddMethod("notifyallexceptions", &SquirrelStd::notifyallexceptions, 2, ".b");
 100 }
 101
 102 void squirrel_register_std(Squirrel *engine)
 103 {
 104         /* We don't use squirrel_helper here, as we want to register to the global
 105          *  scope and not to a class. */
 106         engine->AddMethod("min", &SquirrelStd::min, 3, ".ii");
 107         engine->AddMethod("max", &SquirrelStd::max, 3, ".ii");
 108
 109         sqstd_register_mathlib(engine->GetVM());
 110 }