--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/runtime/object.c	Wed May 13 00:47:40 2009 -0400
@@ -0,0 +1,343 @@
+#include "object.h"
+#include "builtin.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+blueprint ** registered_types = NULL;
+uint32_t max_registered_type = 0;
+uint32_t type_storage = 0;
+
+returntype call_method(uint32_t methodid, calldata * params)
+{
+	int i;
+	blueprint * bp = get_blueprint(params->params[0]);
+	if(methodid >= bp->first_methodid && methodid < bp->last_methodid && bp->method_lookup[methodid - bp->first_methodid])
+	{
+		params->tail_func =  bp->method_lookup[methodid - bp->first_methodid];
+		return TAIL_RETURN;
+	} else {
+		if(METHOD_MISSING >= bp->first_methodid && METHOD_MISSING < bp->last_methodid && bp->method_lookup[METHOD_MISSING - bp->first_methodid])
+		{
+			params->tail_func = bp->method_lookup[METHOD_MISSING - bp->first_methodid];
+			return TAIL_RETURN;
+		} else {
+			//TODO: Add useful info to exception
+			for(i = 0; i < params->num_params; ++i)
+				release_ref(params->params[i]);
+			params->params[0] = new_object(TYPE_METHODMISSINGEXCEPTION);
+			return EXCEPTION_RETURN;
+		}
+	}
+}
+
+returntype set_field(uint32_t setfieldid, calldata * params)
+{
+	int i;
+	blueprint * bp = get_blueprint(params->params[0]);
+	if(setfieldid >= bp->first_setfieldid && setfieldid < bp->last_setfieldid && bp->setter_lookup[setfieldid - bp->first_setfieldid])
+	{
+		params->tail_func =  bp->setter_lookup[setfieldid - bp->first_setfieldid];
+		return TAIL_RETURN;
+	} else {
+		if(METHOD_SETFIELDMISSING >= bp->first_setfieldid && METHOD_SETFIELDMISSING < bp->last_setfieldid && bp->method_lookup[METHOD_SETFIELDMISSING - bp->first_methodid])
+		{
+			params->tail_func = bp->method_lookup[METHOD_SETFIELDMISSING - bp->first_methodid];
+			params->original_methodid = setfieldid;
+			return TAIL_RETURN;
+		} else {
+			//TODO: Add useful info to exception
+			for(i = 0; i < params->num_params; ++i)
+				release_ref(params->params[i]);
+			params->params[0] = new_object(TYPE_FIELDMISSINGEXCEPTION);
+			return EXCEPTION_RETURN;
+		}
+	}
+}
+
+
+returntype get_field(uint32_t getfieldid, calldata * params)
+{
+	int i;
+	blueprint * bp = get_blueprint(params->params[0]);
+	if(getfieldid >= bp->first_getfieldid && getfieldid < bp->last_getfieldid && bp->getter_lookup[getfieldid - bp->first_getfieldid])
+	{
+		params->tail_func =  bp->getter_lookup[getfieldid - bp->first_getfieldid];
+		return TAIL_RETURN;
+	} else {
+		if(METHOD_GETFIELDMISSING >= bp->first_getfieldid && METHOD_GETFIELDMISSING < bp->last_getfieldid && bp->method_lookup[METHOD_GETFIELDMISSING - bp->first_methodid])
+		{
+			params->tail_func = bp->method_lookup[METHOD_GETFIELDMISSING - bp->first_methodid];
+			params->original_methodid = getfieldid;
+			return TAIL_RETURN;
+		} else {
+			//TODO: Add useful info to exception
+			for(i = 0; i < params->num_params; ++i)
+				release_ref(params->params[i]);
+			params->params[0] = new_object(TYPE_FIELDMISSINGEXCEPTION);
+			return EXCEPTION_RETURN;
+		}
+	}
+}
+
+returntype convert_to(uint32_t convertto, calldata * params)
+{
+	int i;
+	blueprint * bp = get_blueprint(params->params[0]);
+	if(convertto >= bp->first_convertto && convertto < bp->last_convertto && bp->convert_to[convertto])
+	{
+		params->tail_func =  bp->convert_to[convertto - bp->first_convertto];
+		return TAIL_RETURN;
+	} else {
+		return NO_CONVERSION;
+	}
+}
+
+returntype convert_from(uint32_t convertfrom, calldata * params)
+{
+	int i;
+	blueprint * bp = registered_types[convertfrom];
+	if(convertfrom >= bp->first_convertfrom && convertfrom < bp->last_convertfrom && bp->convert_from[convertfrom])
+	{
+		params->tail_func =  bp->convert_from[convertfrom - bp->first_convertfrom];
+		return TAIL_RETURN;
+	} else {
+		return NO_CONVERSION;
+	}
+}
+
+returntype coerce_value(uint32_t type, calldata * params)
+{
+	int i;
+	blueprint * bp = get_blueprint(params->params[0]);
+	if(bp == registered_types[type])
+		return NORMAL_RETURN;
+	if(convert_to(type, params) == TAIL_RETURN)
+		return TAIL_RETURN;
+	if(convert_from(type, params) == TAIL_RETURN)
+		return TAIL_RETURN;
+	//TODO: Add useful info to exception
+	for(i = 0; i < params->num_params; ++i)
+		release_ref(params->params[i]);
+	params->params[0] = new_object(TYPE_WRONGTYPEEXCEPTION);
+	return EXCEPTION_RETURN;
+}
+
+object * alloc_object(blueprint * bp)
+{
+	//TODO: Replace with something more performant
+	return malloc(bp->boxed_size);
+}
+
+void * alloc_variable(uint32_t size)
+{
+	return malloc(size);
+}
+
+void dealloc_object(blueprint * bp, object * obj)
+{
+	//TODO: Replace with something more performant
+	free(obj);
+}
+
+object * new_object(uint32_t type)
+{
+	blueprint * bp;
+	object * ret;
+	if(type >= max_registered_type || !registered_types[type])
+		return NULL;
+	bp = registered_types[type];
+	ret = alloc_object(bp);
+	if(ret)
+	{
+		ret->bprint = bp;
+		rh_atomic_set(ret, refcount, 1);
+		memset(((char *)ret) + sizeof(object), '\0', bp->size);
+		bp->init(ret);
+	}
+	return ret;
+}
+
+multisize * new_multisize(uint32_t type, uint32_t size)
+{
+	blueprint *bp;
+	multisize * ret;
+	if(type >= max_registered_type || !registered_types[type])
+		return NULL;
+	ret = alloc_variable(sizeof(multisize) + type);
+	if(ret)
+	{
+		bp = registered_types[type];
+		ret->base.bprint = bp;
+		ret->size = size;
+		rh_atomic_set(&(ret->base), refcount, 1);
+		memset(((char *)ret) + sizeof(multisize), '\0', size);
+		bp->init((object *)ret);
+	}
+	return ret; 
+}
+
+object * copy_object(object * tocopy)
+{
+	object * copy;
+	multisize * mcopy, *mtocopy;
+	blueprint * bp;
+	if(rh_atomic_get(tocopy, refcount) == 1)
+		return tocopy;
+	bp = get_blueprint(tocopy);
+	if(bp->size < 0) {
+		mtocopy = (multisize *)tocopy;
+		mcopy = alloc_variable(sizeof(multisize) + mtocopy->size);
+		mcopy->size = mtocopy->size;
+		memcpy(((char *)mcopy)+sizeof(multisize), ((char *)mtocopy)+sizeof(multisize), mtocopy->size);
+		copy = (object *)mcopy;
+	} else {
+		copy = alloc_object(bp);
+		memcpy(((char *)copy) + sizeof(object), ((char *)tocopy)+sizeof(object), bp->size);
+	}
+	copy->bprint = bp;
+	rh_atomic_set(copy, refcount, 1);
+	bp->copy(copy);
+	release_ref(tocopy);
+	return copy;
+}
+
+void free_object(object * obj)
+{
+	blueprint * bp = get_blueprint(obj);
+	if(bp->cleanup)
+		bp->cleanup(obj);
+	dealloc_object(bp, obj);
+}
+
+void release_ref(object * obj)
+{
+	if(rh_atomic_sub_testzero(obj, refcount, 1))
+		free_object(obj);
+}
+
+void check_type_storage(type)
+{
+	uint32_t type_storage_temp;
+	blueprint ** temp;
+	if(type >= type_storage)
+		if(type_storage)
+		{
+			type_storage_temp = (type + (type_storage >> 1));
+			temp = realloc(registered_types, type_storage_temp * sizeof(blueprint *));
+			if(temp)
+			{
+				registered_types = temp;
+				memset(registered_types + type_storage, '\0', (type_storage_temp - type_storage) * sizeof(blueprint *));
+				type_storage = type_storage_temp;
+			}
+			else
+			{
+				free(registered_types);
+				fprintf(stderr, "Couldn't allocate %d bytes for type storage array\n", type_storage_temp * sizeof(blueprint *));
+				exit(-1);
+			}
+		} else {
+			
+			if(type < INITIAL_TYPE_STORAGE)
+				type_storage =INITIAL_TYPE_STORAGE;
+			else
+				type_storage = type + 8;
+			registered_types = malloc(type_storage * sizeof(blueprint *));
+			if(registered_types)
+				memset(registered_types, '\0', type_storage * sizeof(blueprint *));
+			else
+			{
+				fprintf(stderr, "Couldn't allocate %d bytes for type storage array\n", type_storage * sizeof(blueprint *));
+				exit(-1);
+			}
+				
+		}
+}
+
+void default_action(object * obj)
+{
+}
+
+blueprint * new_blueprint(uint32_t type, uint32_t size, special_func init, special_func copy, special_func cleanup)
+{
+	blueprint * bp = malloc(sizeof(blueprint));
+	if(bp)
+	{
+		bp->size = size;
+		bp->boxed_size = size >= 0 ? size + sizeof(object) : size;
+		bp->method_lookup = bp->getter_lookup = bp->setter_lookup = bp->convert_to = bp->convert_from = NULL;
+		bp->init = init ? init : default_action;
+		bp->copy = copy ? copy : default_action;
+		bp->cleanup = cleanup ? cleanup : default_action;
+		bp->first_methodid = bp->last_methodid = bp->first_getfieldid = bp->last_getfieldid = bp->first_setfieldid = bp->last_setfieldid = bp->first_convertto = bp->last_convertto = bp->first_convertfrom = bp->last_convertfrom = 0;
+		//TODO: Handle names
+		bp->name = NULL;
+	}
+	return bp;
+}
+
+blueprint * register_type_byid(uint32_t type, uint32_t size, special_func init, special_func copy, special_func cleanup)
+{
+	check_type_storage(type);
+	if(registered_types[type])
+		return registered_types[type];
+	registered_types[type] = new_blueprint(type, size, init, copy, cleanup);
+	if(!registered_types[type])
+	{
+		fputs("Couldn't allocate new object blueprint\n", stderr);
+		exit(-1);
+	}
+	if(type >= max_registered_type)
+		max_registered_type = type + 1;
+	return registered_types[type];
+}
+
+void add_method(blueprint * bp, uint32_t methodid, rhope_func impl)
+{
+	rhope_func * temp;
+	if(methodid < 1) {
+		fputs("Attempt to add a method with an ID < 1\n", stderr);
+		exit(-1);
+	}
+	if (!bp->method_lookup)
+	{
+		bp->method_lookup = malloc(sizeof(rhope_func) * INITIAL_METHOD_LOOKUP);
+		if(!bp->method_lookup) {
+			fprintf(stderr, "Couldn't allocate %d bytes for method lookup table\n", sizeof(rhope_func) * INITIAL_METHOD_LOOKUP);
+			exit(-1);
+		}
+		if(methodid - BELOW_INITIAL_METHOD < 1) {
+			bp->first_methodid = 1;
+			bp->last_methodid = 1+INITIAL_METHOD_LOOKUP;
+		} else {
+			bp->first_methodid = methodid - BELOW_INITIAL_METHOD;
+			bp->last_methodid = bp->first_methodid + INITIAL_METHOD_LOOKUP;
+		}
+		memset(bp->method_lookup, '\0', sizeof(rhope_func) * INITIAL_METHOD_LOOKUP);
+	} else {
+		if (methodid < bp->first_methodid) {
+			temp = bp->method_lookup;
+			//Note: if this gets changed to generating an exception on failure, we need to restore the original buffer
+			bp->method_lookup = malloc(sizeof(rhope_func) * (bp->last_methodid-methodid));
+			if(!bp->method_lookup) {
+				fprintf(stderr, "Couldn't allocate %d bytes for method lookup table\n", sizeof(rhope_func) * (bp->last_methodid-methodid));
+				exit(-1);
+			}
+			memset(bp->method_lookup, '\0', (bp->first_methodid-methodid) * sizeof(rhope_func));
+			memcpy(bp->method_lookup + bp->first_methodid-methodid, temp, (bp->last_methodid-bp->first_methodid)*sizeof(rhope_func));
+			free(temp);
+			bp->first_methodid = methodid;
+		} else if(methodid >= bp->last_methodid) {
+			//Note: if this gets changed to generating an exception on failure, we need to restore the original buffer
+			bp->method_lookup = realloc(bp->method_lookup, (methodid+1-bp->first_methodid) * sizeof(rhope_func));
+			if(!bp->method_lookup) {
+				fprintf(stderr, "Couldn't resize method lookup table to %d bytes\n", (methodid+1-bp->first_methodid) * sizeof(rhope_func));
+				exit(-1);
+			}
+			memset(bp->method_lookup+bp->last_methodid, '\0', (methodid+1)-bp->last_methodid);
+			bp->last_methodid = methodid;
+		}
+	}
+	bp->method_lookup[methodid-bp->first_methodid] = impl;
+}