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Implements global tech modification function. Fixes #1358, refs #1520.

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Applies tech modifications to template data returned by GuiInterface.
Extends engine to load arbitrary global scripts, separates this from RNG
replacement. Refs #1193.
Loads global scripts for most script contexts for consistency.
Adds simulation tests for global scripts.

This was SVN commit r12056.
This commit is contained in:
historic_bruno
2012-07-03 02:16:45 +00:00
parent db943341a8
commit 99d04e93bb
14 changed files with 195 additions and 111 deletions
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source/scriptinterface/ScriptInterface.cpp
+32 -26
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@@ -609,38 +609,44 @@ void* ScriptInterface::GetCallbackData(JSContext* cx)
return JS_GetContextPrivate(cx);
}
void ScriptInterface::ReplaceNondeterministicFunctions(boost::rand48& rng)
bool ScriptInterface::LoadGlobalScripts()
{
jsval math;
if (!JS_GetProperty(m->m_cx, m->m_glob, "Math", &math) || !JSVAL_IS_OBJECT(math))
{
LOGERROR(L"ReplaceNondeterministicFunctions: failed to get Math");
return;
}
// Ignore this failure in tests
if (!g_VFS)
return false;
JSFunction* random = JS_DefineFunction(m->m_cx, JSVAL_TO_OBJECT(math), "random", Math_random, 0,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
if (!random)
// Load and execute *.js in the global scripts directory
VfsPaths pathnames;
vfs::GetPathnames(g_VFS, L"globalscripts/", L"*.js", pathnames);
for (VfsPaths::iterator it = pathnames.begin(); it != pathnames.end(); ++it)
{
LOGERROR(L"ReplaceNondeterministicFunctions: failed to replace Math.random");
return;
}
// Store the RNG in a slot which is sort-of-guaranteed to be unused by the JS engine
JS_SetReservedSlot(m->m_cx, JS_GetFunctionObject(random), 0, PRIVATE_TO_JSVAL(&rng));
// Load a script which replaces some of the system dependent trig functions
VfsPath path("globalscripts/Math.js");
// This function is called from tests without the VFS set up,
// so silently fail in that case because every other option seems worse
if (g_VFS && VfsFileExists(path))
{
if (!this->LoadGlobalScriptFile(path))
if (!LoadGlobalScriptFile(*it))
{
LOGERROR(L"ReplaceNondeterministicFunctions: failed to load %ls", path.string().c_str());
return;
LOGERROR(L"LoadGlobalScripts: Failed to load script %ls", it->string().c_str());
return false;
}
}
return true;
}
bool ScriptInterface::ReplaceNondeterministicRNG(boost::rand48& rng)
{
jsval math;
if (JS_GetProperty(m->m_cx, m->m_glob, "Math", &math) && JSVAL_IS_OBJECT(math))
{
JSFunction* random = JS_DefineFunction(m->m_cx, JSVAL_TO_OBJECT(math), "random", Math_random, 0,
JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT);
if (random)
{
// Store the RNG in a slot which is sort-of-guaranteed to be unused by the JS engine
if (JS_SetReservedSlot(m->m_cx, JS_GetFunctionObject(random), 0, PRIVATE_TO_JSVAL(&rng)))
return true;
}
}
LOGERROR(L"ReplaceNondeterministicRNG: failed to replace Math.random");
return false;
}
void ScriptInterface::Register(const char* name, JSNative fptr, size_t nargs)