From 4ddc35634160da5779c46ab63a5b3d351af50b83 Mon Sep 17 00:00:00 2001
From: aap <aap@papnet.eu>
Date: Wed, 25 Nov 2020 22:49:50 +0100
Subject: memory heap starting to work

---
 src/fakerw/fake.cpp   | 32 ++++++++++++++++++++++++++++----
 src/fakerw/rwplcore.h |  6 +++---
 2 files changed, 31 insertions(+), 7 deletions(-)

(limited to 'src/fakerw')

diff --git a/src/fakerw/fake.cpp b/src/fakerw/fake.cpp
index 64a37421..39606335 100644
--- a/src/fakerw/fake.cpp
+++ b/src/fakerw/fake.cpp
@@ -16,9 +16,14 @@ using namespace rw;
 RwUInt8 RwObjectGetType(const RwObject *obj) { return obj->type; }
 
 
-void *RwMalloc(size_t size) { return malloc(size); }
-void *RwCalloc(size_t numObj, size_t sizeObj) { return calloc(numObj, sizeObj); }
-void  RwFree(void *mem) { free(mem); }
+void *RwMalloc(size_t size) { return engine->memfuncs.rwmalloc(size, 0); }
+void *RwCalloc(size_t numObj, size_t sizeObj) {
+	void *mem = RwMalloc(numObj*sizeObj);
+	if(mem)
+		memset(mem, 0, numObj*sizeObj);
+	return mem;
+}
+void  RwFree(void *mem) { engine->memfuncs.rwfree(mem); }
 
 
 //RwReal RwV3dNormalize(RwV3d * out, const RwV3d * in);
@@ -536,8 +541,27 @@ RwBool RwRenderStateSet(RwRenderState state, void *value)
 	}
 }
 
+static rw::MemoryFunctions gMemfuncs;
+static void *(*real_malloc)(size_t size);
+static void *(*real_realloc)(void *mem, size_t newSize);
+static void *mallocWrap(size_t sz, uint32 hint) { if(sz == 0) return nil; return real_malloc(sz); }
+static void *reallocWrap(void *p, size_t sz, uint32 hint) { return real_realloc(p, sz); }
+
+
 // WARNING: unused parameters
-RwBool RwEngineInit(RwMemoryFunctions *memFuncs, RwUInt32 initFlags, RwUInt32 resArenaSize) { Engine::init(); return true; }
+RwBool RwEngineInit(RwMemoryFunctions *memFuncs, RwUInt32 initFlags, RwUInt32 resArenaSize) {
+	if(memFuncs){
+		real_malloc = memFuncs->rwmalloc;
+		real_realloc = memFuncs->rwrealloc;
+		gMemfuncs.rwmalloc = mallocWrap;
+		gMemfuncs.rwrealloc = reallocWrap;
+		gMemfuncs.rwfree = memFuncs->rwfree;
+		Engine::init(&gMemfuncs);
+	}else{
+		Engine::init(nil);
+	}
+	return true;
+}
 // TODO: this is platform dependent
 RwBool RwEngineOpen(RwEngineOpenParams *initParams) {
 	static EngineOpenParams openParams;
diff --git a/src/fakerw/rwplcore.h b/src/fakerw/rwplcore.h
index 79c745b6..511f7678 100644
--- a/src/fakerw/rwplcore.h
+++ b/src/fakerw/rwplcore.h
@@ -141,15 +141,15 @@ RwUInt8 RwObjectGetType(const RwObject *obj);
  ***********************************************
  */
 
-struct RwMemoryFunctions;
-/*
+struct RwMemoryFunctions
 {
+	// NB: from RW 3.6 on the allocating functions take
+	// a hint parameter!
 	void *(*rwmalloc)(size_t size);
 	void  (*rwfree)(void *mem);
 	void *(*rwrealloc)(void *mem, size_t newSize);
 	void *(*rwcalloc)(size_t numObj, size_t sizeObj);
 };
-*/
 
 void *RwMalloc(size_t size);
 void  RwFree(void *mem);
-- 
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