some stuff.

Makefile

@@ -1,16 +1,20 @@
-SRCS = $(shell find -name '*.[cS]')
+SRCS = $(shell find . -regextype posix-egrep -regex '.*\.[cS]') src/cplusplus.cpp
 OBJS = $(addsuffix .o,$(basename $(SRCS)))
 
 CC = gcc
+CXX = g++
 LD = ld
+LEX=flex
+YACC=bison
 
 # define nullptr, but not NULL.
 CFLAGS = -m32 -Dnullptr=0
 ASFLAGS =
-CCFLAGS = -g -std=c11 -Wall -g -fno-stack-protector -ffreestanding
+CCFLAGS = -g -std=c11 -Wall -g -fno-stack-protector -ffreestanding -Iinclude
+CXXFLAGS = -g -std=c++11 -Wall -g -fno-stack-protector -fno-exceptions -ffreestanding -Wno-unused-function -Iinclude
 LDFLAGS = -g -melf_i386 -Tkernel.ld
 
-kernel: $(OBJS)
+kernel: $(OBJS) obj/tsvm.o obj/lex.yy.o obj/trainscript.tab.o
 	$(LD) $(LDFLAGS) -o $@ $(addprefix obj/, $(notdir $^))
 
 %.o: %.c
@@ -19,6 +23,24 @@ kernel: $(OBJS)
 %.o: %.S
 	$(CC) $(CFLAGS) $(ASFLAGS) -c -o $(addprefix obj/, $(notdir $@)) $^
 
+%.o: %.cpp
+	$(CXX) $(CFLAGS) $(CXXFLAGS) -c -o $(addprefix obj/, $(notdir $@)) $^
+
+obj/tsvm.o: trainscript/tsvm.cpp trainscript/tsvm.hpp trainscript/common.h
+	g++ $(CFLAGS) $(CXXFLAGS) -c trainscript/tsvm.cpp -o obj/tsvm.o
+
+obj/lex.yy.o: trainscript/lex.yy.cpp trainscript/tsvm.hpp trainscript/common.h trainscript/trainscript.tab.cpp
+	g++ $(CFLAGS) $(CXXFLAGS) -c trainscript/lex.yy.cpp -o obj/lex.yy.o
+
+trainscript.tab.o: trainscript/lex.yy.cpp trainscript/trainscript.tab.cpp trainscript/tsvm.hpp trainscript/common.h
+	g++ $(CFLAGS) $(CXXFLAGS) -c trainscript/trainscript.tab.cpp -o obj/trainscript.tab.o
+
+trainscript/lex.yy.cpp: trainscript/trainscript.l
+	$(LEX) --header-file=trainscript/trainscript.l.h -o trainscript/lex.yy.cpp trainscript/trainscript.l
+
+trainscript/trainscript.tab.cpp: trainscript/trainscript.y
+	$(YACC) -o trainscript/trainscript.tab.cpp -d trainscript/trainscript.y
+
 clean:
 	rm $(addprefix obj/, $(notdir $(OBJS)))
 

include/console.h

@@ -1,5 +1,9 @@
 #pragma once
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 #define CONSOLE_WIDTH 80
 #define CONSOLE_HEIGHT 25
 
@@ -71,4 +75,8 @@ void kputs(const char *str);
  * @param format The format string that will be printed in formatted version.
  * @param ... The format parameters that will be used to print the string.
  */
-void kprintf(const char *format, ...);
+void kprintf(const char *format, ...);
+
+#if defined(__cplusplus)
+}
+#endif

include/cpustate.h

@@ -1,6 +1,10 @@
 #pragma once
 #include "inttypes.h"
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 typedef struct
 {
 	// Saved by interrupt routine
@@ -21,4 +25,8 @@ typedef struct
     uint32_t   eflags;
     uint32_t   esp;
     uint32_t   ss;
-} CpuState;
+} CpuState;
+
+#if defined(__cplusplus)
+}
+#endif

include/interrupts.h

@@ -1,4 +1,9 @@
 #pragma once
+#include "cpustate.h"
+
+#if defined(__cplusplus)
+extern "C"  {
+#endif
 
 #define GDTF_DATASEG 0x02
 #define GDTF_CODESEG 0x0a
@@ -16,11 +21,20 @@
 #define INTR_TRAP_GATE 7
 #define INTR_TASK_GATE 5
 
+typedef void (*InterruptHandler)(CpuState *);
+
 /**
  * Initializes interrupt handling and the global descriptor table.
  */
 void intr_init();
 
+/**
+ * @brief Sets the handler for the given interrupt.
+ * @param interrupt The number of the interrupt.
+ * @param handler The function that should handle this interrupt
+ */
+void intr_set_handler(uint32_t interrupt, InterruptHandler handler);
+
 /**
  * @brief Enables physical interrupts.
  */
@@ -37,3 +51,6 @@ static inline void irq_disable(void)
 	__asm__ volatile("cli");
 }
 
+#if defined(__cplusplus)
+}
+#endif

include/io.h

@@ -1,6 +1,11 @@
 #pragma once
 
-#include "inttypes.h"
+#include <inttypes.h>
+
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 
 /**
  * @brief Outputs a byte on the given port.
@@ -11,3 +16,7 @@ static inline void outb(uint16_t port, uint8_t data)
 {
 	__asm__ volatile ("outb %0, %1" : : "a" (data), "Nd" (port));
 }
+
+#if defined(__cplusplus)
+}
+#endif

include/ker/dictionary.hpp

@@ -0,0 +1,98 @@
+#pragma once
+
+#include "pair.hpp"
+#include "vector.hpp"
+
+namespace ker
+{
+	template<typename Key, typename Value>
+	class Dictionary
+	{
+	public:
+		typedef Pair<Key, Value> Entry;
+	private:
+		Vector<Entry> contents;
+	public:
+		Dictionary() :
+			contents()
+		{
+
+		}
+
+		Value &at(const Key &key)
+		{
+			for(auto &&pair : this->contents)
+			{
+				if(pair.first == key) {
+					return pair.second;
+				}
+			}
+		}
+
+		const Value &at(const Key &key) const
+		{
+			for(auto &&pair : this->contents)
+			{
+				if(pair.first == key) {
+					return pair.second;
+				}
+			}
+		}
+
+		bool contains(const Key &key) const
+		{
+			for(const auto &pair : this->contents)
+			{
+				if(pair.first == key) {
+					return true;
+				}
+			}
+			return false;
+		}
+
+		void add(const Key &key, const Value &value)
+		{
+			if(this->contains(key)) {
+				for(auto &&pair : this->contents)
+				{
+					if(pair.first == key) {
+						pair.second = value;
+						return;
+					}
+				}
+			} else {
+				this->contents.append(Entry(key, value));
+			}
+		}
+
+		Value& operator [](const Key &key)
+		{
+			return this->at(key);
+		}
+
+		const Value& operator [](const Key &key) const
+		{
+			return this->at(key);
+		}
+
+		Entry * begin()
+		{
+			return this->contents.begin();
+		}
+
+		Entry * end()
+		{
+			return this->contents.end();
+		}
+
+		const Entry * begin() const
+		{
+			return this->contents.begin();
+		}
+
+		const Entry * end() const
+		{
+			return this->contents.end();
+		}
+	};
+}

include/ker/new.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <inttypes.h>
+
+inline void* operator new(size_t size, void* __p)
+{
+	return __p;
+}
+
+inline void* operator new[](size_t size, void* __p)
+{
+	return __p;
+}
+
+inline void operator delete  (void*, void*) { }
+inline void operator delete[](void*, void*) { }

include/ker/pair.hpp

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace ker
+{
+	template<typename First, typename Second>
+	struct Pair
+	{
+		First first;
+		Second second;
+
+		Pair() : first(), second() { }
+
+		Pair(const First &first, const Second &second) :
+			first(first),
+			second(second)
+		{
+
+		}
+	};
+}

include/ker/string.hpp

@@ -0,0 +1,100 @@
+#pragma once
+
+#include <stdlib.h>
+#include <inttypes.h>
+
+namespace ker
+{
+	class String
+	{
+	private:
+		uint8_t *mText;
+		size_t mLength;
+	public:
+		String() :
+			mText(nullptr),
+			mLength(0)
+		{
+
+		}
+
+		String(const char *text) :
+			mText(nullptr),
+			mLength(0)
+		{
+			this->mLength = strlen(text);
+			this->mText = (uint8_t*)malloc(this->mLength + 1);
+			memcpy(this->mText, text, this->mLength);
+		}
+
+		String(const uint8_t *bytes, size_t length) :
+			mText((uint8_t*)malloc(length)),
+			mLength(length)
+		{
+			memcpy(this->mText, bytes, length);
+		}
+
+		~String()
+		{
+			free(this->mText);
+		}
+
+		size_t length() const
+		{
+			return this->mLength;
+		}
+
+		bool equals(const String &other) const
+		{
+			if(this->mLength != other.mLength) {
+				return false;
+			}
+			return memcmp(this->mText, other.mText, this->mLength) != 0;
+		}
+
+		const uint8_t *text() const
+		{
+			static const uint8_t empty[] = { 0 };
+			if(this->mText != nullptr) {
+				return this->mText;
+			} else {
+				return empty;
+			}
+		}
+
+		const char *str() const
+		{
+			return (char*)this->text();
+		}
+
+		operator const uint8_t *() const
+		{
+			return this->text();
+		}
+
+		operator const char *() const
+		{
+			return this->str();
+		}
+
+		uint8_t & operator [](size_t index)
+		{
+			return this->mText[index];
+		}
+
+		const uint8_t & operator [](size_t index) const
+		{
+			return this->mText[index];
+		}
+
+		bool operator ==(const String &other) const
+		{
+			return this->equals(other);
+		}
+
+		bool operator !=(const String &other) const
+		{
+			return !this->equals(other);
+		}
+	};
+};

include/ker/vector.hpp

@@ -0,0 +1,117 @@
+#pragma once
+
+#include <inttypes.h>
+#include "new.hpp"
+
+namespace ker
+{
+	template<typename T>
+	class Vector
+	{
+	public:
+		static const size_t initialCap = 32;
+	private:
+		T *mData;
+		size_t mLength;
+		size_t mReserved;
+	public:
+		Vector() :
+			mData(nullptr),
+			mLength(0),
+			mReserved(0)
+		{
+			this->reserve(Vector<T>::initialCap);
+		}
+
+		explicit Vector(size_t initialReserve) :
+			Vector()
+		{
+			this->reserve(initialReserve);
+		}
+
+		size_t length() const
+		{
+			return this->mLength;
+		}
+
+		T &at(size_t index)
+		{
+			return this->mData[index];
+		}
+
+		const T &at(size_t index) const
+		{
+			return this->mData[index];
+		}
+
+		void append(const T &value)
+		{
+			this->reserve(this->mLength + 1);
+			new (&this->mData[this->mLength - 1]) T(value);
+			this->mLength += 1;
+		}
+
+		void resize(size_t size)
+		{
+			size_t current = this->mLength;
+			this->reserve(size);
+
+			if(current > size) {
+				// "Downgrade"
+				for(size_t i = this->mLength - 1; i > size; i--) {
+					this->mData[i].~T();
+				}
+			} else {
+				// "Upgrade"
+				for(size_t i = this->mLength; i < size; i++) {
+					new (&this->mData[i]) T ();
+				}
+			}
+		}
+
+		void reserve(size_t space)
+		{
+			if(this->mReserved >= space) {
+				return;
+			}
+			const size_t newSize = sizeof(T) * space;
+
+			T *newData = (T*)malloc(newSize);
+			if(this->mData != nullptr) {
+				memcpy(newData, this->mData, newSize);
+				free(this->mData);
+			}
+			this->mData = newData;
+		}
+
+		T& operator [](size_t idx)
+		{
+			return this->at(idx);
+		}
+
+		const T& operator [](size_t idx) const
+		{
+			return this->at(idx);
+		}
+
+		T* begin()
+		{
+			return &this->mData[0];
+		}
+
+		T* end()
+		{
+			return &this->mData[this->mLength];
+		}
+
+		const T* begin() const
+		{
+			return &this->mData[0];
+		}
+
+		const T* end() const
+		{
+			return &this->mData[this->mLength];
+		}
+	};
+}

include/kernel.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <inttypes.h>
+
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
+void die(const char *msg);
+
+#if defined(__cplusplus)
+}
+#endif

include/multiboot.h

@@ -2,6 +2,10 @@
 
 #include <inttypes.h>
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 #define MB_MEMSIZE (1<<0)
 #define MB_BOOTDEVICE (1<<1)
 #define MB_COMMANDLINE (1<<2)
@@ -89,3 +93,7 @@ typedef struct {
     uint16_t vbeInterfaceOffset;
     uint16_t vbeInterfaceLength;
 } __attribute__((packed)) MultibootStructure;
+
+#if defined(__cplusplus)
+}
+#endif

include/pmm.h

@@ -2,6 +2,10 @@
 
 #include "multiboot.h"
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 /**
  * Initializes physical memory management.
  * @param mb The multi boot structure used for gathering information about free memory.
@@ -22,3 +26,7 @@ void *pmm_alloc(void);
  * Calculates the free memory in bytes.
  */
 uint32_t pmm_calc_free(void);
+
+#if defined(__cplusplus)
+}
+#endif

include/stdlib.h

@@ -4,6 +4,10 @@
 #include <inttypes.h>
 #include "varargs.h"
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 char *itoa(int value, char *str, int base);
 int atoi(const char *str);
 float atof(const char *str);
@@ -21,6 +25,10 @@ void *malloc(size_t size);
  */
 void free(void *mem);
 
+void* realloc (void* ptr, size_t size);
+
+void exit(int errorCode);
+
 static inline void *memset(void *ptr, int value, size_t num)
 {
     uint8_t *it = (uint8_t*)ptr;
@@ -44,6 +52,20 @@ static inline void *memcpy(void *destination, const void *source, size_t num)
 
 void *memmove(void *destination, const void *source, size_t num);
 
+static inline int memcmp(const void *s1, const void *s2, size_t n)
+{
+	const uint8_t * p1 = (const uint8_t *)s1;
+	const uint8_t * p2 = (const uint8_t *)s2;
+	for ( ; n-- ; p1++, p2++) {
+		uint8_t u1 = *p1;
+		uint8_t u2 = *p2;
+		if ( u1 != u2) {
+			return (u1-u2);
+		}
+	}
+	return 0;
+}
+
 static inline char *strcpy(char *destination, const char *source)
 {
     while(*source)
@@ -79,3 +101,15 @@ static inline void *calloc(size_t size)
     memset(mem, 0, size);
     return mem;
 }
+
+static inline char * strdup(const char *str)
+{
+	size_t len = strlen(str) + 1;
+	char * n = (char*)malloc(len);
+	memcpy(n, str, len);
+	return n;
+}
+
+#if defined(__cplusplus)
+}
+#endif

include/string.h

@@ -0,0 +1,3 @@
+#pragma once
+
+#include "stdlib.h"

include/timer.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <inttypes.h>
+
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
+/**
+ * @brief Initializes the hardware timer.
+ */
+void timer_init();
+
+/**
+ * @brief Gets the number of ticks the timer has ticked.
+ * @return
+ */
+uint64_t timer_get();
+
+/**
+ * @brief Sets the timer to a given value.
+ * @param time The number of ticks the timer should have now.
+ */
+void timer_set(uint64_t time);
+
+
+/**
+ * @brief Waits until a certain time elapsed.
+ * @param ticks The number of ticks to wait
+ */
+void sleep(uint64_t ticks);
+
+#if defined(__cplusplus)
+}
+#endif

include/varargs.h

@@ -1,6 +1,14 @@
 #pragma once
  
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 typedef __builtin_va_list       va_list;
 #define va_start(ap, X)         __builtin_va_start(ap, X)
 #define va_arg(ap, type)        __builtin_va_arg(ap, type)
-#define va_end(ap)              __builtin_va_end(ap)
+#define va_end(ap)              __builtin_va_end(ap)
+
+#if defined(__cplusplus)
+}
+#endif

include/vmm.h

@@ -2,6 +2,10 @@
 
 #include <inttypes.h>
 
+#if defined(__cplusplus)
+extern "C"  {
+#endif
+
 #define VM_PRESENT  0x01
 #define VM_WRITABLE 0x02
 #define VM_USER     0x04
@@ -19,3 +23,7 @@ void vmm_init(void);
  * @remarks If flags is 0, the mapping will be undone.
  */
 void vmm_map(uintptr_t virtual, uintptr_t physical, uint32_t flags);
+
+#if defined(__cplusplus)
+}
+#endif

src/cplusplus.cpp

@@ -0,0 +1,24 @@
+
+#include <stdlib.h>
+#include <inttypes.h>
+#include <ker/new.hpp>
+
+void *operator new( size_t size )
+{
+	return calloc( size );
+}
+
+void *operator new[]( size_t  size )
+{
+	return calloc( size );
+}
+
+void operator delete( void *obj )
+{
+	free( obj );
+}
+
+void operator delete[]( void *obj )
+{
+	free( obj );
+}

src/init.c

@@ -1,9 +1,11 @@
-#include "kernel.h"
-#include "stdlib.h"
-#include "console.h"
-#include "interrupts.h"
-#include "pmm.h"
-#include "vmm.h"
+#include <kernel.h>
+#include <stdlib.h>
+#include <console.h>
+#include <interrupts.h>
+#include <pmm.h>
+#include <vmm.h>
+
+#include <timer.h>
 
 void die(const char *msg)
 {
@@ -16,15 +18,6 @@ void die(const char *msg)
     }
 }
 
-void ksleep(uint32_t time)
-{
-    for(uint32_t i = 0; i < time; i++)
-    {
-        // BURN, CPU, BURN!
-        for(volatile size_t i = 0; i < 40000000; i++);
-    }
-}
-
 static void debug_test()
 {
 	char buffer[64];
@@ -101,6 +94,18 @@ static void dumpMB(const MultibootStructure *mbHeader)
     // TODO: MB_APS_TABLE
 }
 
+void cpp_init()
+{
+
+}
+
+void putsuccess()
+{
+	int y; kgetpos(nullptr, &y);
+	ksetpos(CONSOLE_WIDTH - 9, y);
+	kputs("[success]");
+}
+
 void init(const MultibootStructure *mbHeader)
 {
     (void)debug_test;
@@ -113,37 +118,42 @@ void init(const MultibootStructure *mbHeader)
     //dumpMB(mbHeader);
 
     kputs("Initialize physical memory management: ");
-    pmm_init(mbHeader);
-    kputs("success.\n");
+	pmm_init(mbHeader);
+	putsuccess();
+
     // uint32_t freeMem = pmm_calc_free();
     //kprintf("Free memory: %d B, %d kB, %d MB\n", freeMem, freeMem >> 10, freeMem >> 20);
 
-    ksleep(1);
-
     kputs("Initialize virtual memory management: ");
-    vmm_init();
-    kputs("success.\n");
+	vmm_init();
+	putsuccess();
 
-	kputs("Initialize interrupts: ");
+	kputs("Initialize interrupts:");
 	intr_init();
-	kputs("success.\n");
+	putsuccess();
 
-	kputs("Enable hw interrupts:  ");
+	kputs("Enable hw interrupts:");
 	irq_enable();
-	kputs("success.\n");
+	putsuccess();
 
-	//__asm__ volatile("sti");
+	kputs("Prepare heap memory:");
+	for(uintptr_t ptr = 0x400000; ptr < 0x800000; ptr += 4096)
+	{
+		vmm_map(ptr, (uintptr_t)pmm_alloc(), VM_PROGRAM);
+	}
+	putsuccess();
 
-    kputs("Prepare heap memory:   ");
-    for(uintptr_t ptr = 0x400000; ptr < 0x800000; ptr += 4096)
-    {
-        vmm_map(ptr, (uintptr_t)pmm_alloc(), VM_PROGRAM);
-    }
-    kputs("success.\n");
+	kputs("Initialize timer:");
+	timer_init();
+	putsuccess();
+
+	kputs("Initialize C++ objects: ");
+	cpp_init();
+	putsuccess();
 
 	while(1)
 	{
 		kputs("x");
-		ksleep(1);
+		sleep(1);
 	}
 }

src/interrupts.c

@@ -10,6 +10,8 @@
 static uint64_t gdt[GDT_ENTRIES];
 static uint64_t idt[IDT_ENTRIES];
 
+static InterruptHandler handlers[IDT_ENTRIES];
+
 static const char *interruptNames[] = {
 	"Divide-by-zero Error",//	0 (0x0)	Fault	#DE	No
 	"Debug",//	1 (0x1)	Fault/Trap	#DB	No
@@ -65,21 +67,39 @@ static const size_t interruptNameCount = sizeof(interruptNames) / sizeof(interru
 
 #include "intr_stubs.h"
 
+void intr_set_handler(uint32_t interrupt, InterruptHandler handler)
+{
+	if(interrupt < IDT_ENTRIES) {
+		handlers[interrupt] = handler;
+	}
+}
+
 void intr_routine(CpuState *state)
 {
 	const char *name = "Unknown";
 	if(state->intr < interruptNameCount)
 		name = interruptNames[state->intr];
+	InterruptHandler handler = handlers[state->intr];
 	if(state->intr < 0x20)
 	{
-		kprintf("\n\x12\x04Exception [%d] %s!\x12\0x7\n", state->intr, name);
-		while(1)
-		{
-			__asm__ volatile("cli; hlt");
+		if(handler != nullptr) {
+			handler(state);
+		} else {
+			kprintf("\n\x12\x04Exception [%d] %s!\x12\0x7\n", state->intr, name);
+			while(1)
+			{
+				__asm__ volatile("cli; hlt");
+			}
 		}
 	}
 	if (state->intr >= 0x20 && state->intr <= 0x2f)
 	{
+		if(handler != nullptr) {
+			handler(state);
+		} else {
+			kprintf("[Unhandled IRQ: %d]", state->intr);
+		}
+
 		if (state->intr >= 0x28)
 		{
 			// EOI an Slave-PIC
@@ -90,11 +110,15 @@ void intr_routine(CpuState *state)
 	}
 	else
 	{
-		kprintf("\n\x12\x04Interrupt [%d] %s occurred!\x12\0x7\n", state->intr, name);
-		while(1)
-		{
-			// Prozessor anhalten
-			__asm__ volatile("cli; hlt");
+		if(handler != nullptr) {
+			handler(state);
+		} else {
+			kprintf("\n\x12\x04Interrupt [%d] %s occurred!\x12\0x7\n", state->intr, name);
+			while(1)
+			{
+				// Prozessor anhalten
+				__asm__ volatile("cli; hlt");
+			}
 		}
 	}
 }
@@ -240,8 +264,16 @@ static void init_idt(void)
 	__asm__ volatile("lidt %0" : : "m" (idtp));
 }
 
+void init_handlers(void)
+{
+	memset(handlers, 0, sizeof(handlers));
+}
+
 void intr_init(void)
 {
+	// Initialize handler table
+	init_handlers();
+
 	// Initialize global descriptor table
 	init_gdt();
 

src/kernel.h

@@ -1,7 +0,0 @@
-#pragma once
-
-#include <inttypes.h>
-
-void die(const char *msg);
-
-void ksleep(uint32_t time);

src/stdlib.c

@@ -1,4 +1,23 @@
-#include "stdlib.h"
+#include <stdlib.h>
+#include <kernel.h>
+
+void* realloc (void* ptr, size_t size)
+{
+	void *n = malloc(size);
+	memcpy(n, ptr, size);
+	free(ptr);
+	return n;
+}
+
+void exit(int errorCode)
+{
+	static char buffer[128];
+	static char tmp[10];
+	strcpy(buffer, "Program exited with error code ");
+	strcat(buffer, itoa(errorCode, tmp, 10));
+	strcat(buffer, ".\n");
+	die(buffer);
+}
 
 static void reverse(char *str, int length)
 {

src/timer.c

@@ -0,0 +1,33 @@
+
+#include "timer.h"
+#include "interrupts.h"
+
+static volatile uint64_t ticks = 0;
+
+static void timer_irq()
+{
+	ticks++;
+}
+
+void timer_init()
+{
+	ticks = 0;
+	intr_set_handler(0x20, timer_irq);
+}
+
+uint64_t timer_get()
+{
+	return ticks;
+}
+
+void timer_set(uint64_t time)
+{
+	ticks = time;
+}
+
+void sleep(uint64_t t)
+{
+	uint64_t end = timer_get() + t;
+	while(timer_get() < end);
+}
+

trainOS.pro

@@ -12,23 +12,32 @@ SOURCES += \
     src/stdlib.c \
     src/vmm.c \
     trainscript/tsvm.cpp \
-    trainscript/main.cpp
+    trainscript/main.cpp \
+    src/timer.c \
+    src/cplusplus.cpp
 
 HEADERS += \
-    src/console.h \
-    src/cpustate.h \
-    src/interrupts.h \
-    src/intr_stubs.h \
-    src/io.h \
-    src/kernel.h \
-    src/multiboot.h \
-    src/pmm.h \
-    src/stdlib.h \
-    src/varargs.h \
-    src/vmm.h \
+	include/console.h \
+	include/cpustate.h \
+	include/interrupts.h \
+	include/intr_stubs.h \
+	include/io.h \
+	include/kernel.h \
+	include/multiboot.h \
+	include/pmm.h \
+	include/stdlib.h \
+	include/varargs.h \
+	include/vmm.h \
 	trainscript/common.h \
     trainscript/tsvm.hpp \
-    trainscript/typeid.hpp
+    trainscript/typeid.hpp \
+	include/timer.h \
+    include/ker/string.hpp \
+    include/ker/pair.hpp \
+    include/ker/vector.hpp \
+    include/ker/dictionary.hpp \
+    include/string.h \
+    include/ker/new.hpp
 
 DISTFILES += \
     asm/intr_common_handler.S \

trainscript/Makefile

@@ -15,10 +15,10 @@ main.o: main.cpp tsvm.hpp common.h
 tsvm.o: tsvm.cpp tsvm.hpp common.h
 	g++ $(CCFLAGS) -c tsvm.cpp -o tsvm.o
 
-lex.yy.o: lex.yy.cpp tsvm.hpp common.h
+lex.yy.o: lexyy.cpp tsvm.hpp common.h
 	g++ $(CCFLAGS) -c lex.yy.cpp -o lex.yy.o
 
-trainscript.tab.o: lex.yy.cpp trainscript.tab.cpp tsvm.hpp common.h
+trainscript.tab.o: lex.yy.cpp trainscript_tab.cpp tsvm.hpp common.h
 	g++ $(CCFLAGS) -c trainscript.tab.cpp -o trainscript.tab.o
 
 lex.yy.cpp: trainscript.l

trainscript/file01.ts

@@ -36,6 +36,7 @@ BEGIN
 	1 → iter;
 	0 → r;
 	WHILE iter < max DO
+#	FOR iter FROM 1 TO max DO
 	BEGIN
 		IF (iter % 5) = 0 THEN
 			r + iter → r;

trainscript/trainscript.l

@@ -1,7 +1,7 @@
 %{
 #include <stdlib.h>
 #include "common.h"
-#include "trainscript.tab.h"
+#include "trainscript.tab.hpp"
 
 %}
 %option noyywrap

trainscript/trainscript.tab.hpp

@@ -0,0 +1,128 @@
+/* A Bison parser, made by GNU Bison 3.0.4.  */
+
+/* Bison interface for Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989-1990, 2000-2015 Free Software Foundation, Inc.
+
+   This program 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, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+#ifndef YY_YY_TRAINSCRIPT_TRAINSCRIPT_TAB_HPP_INCLUDED
+# define YY_YY_TRAINSCRIPT_TRAINSCRIPT_TAB_HPP_INCLUDED
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
+
+/* Token type.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    TAB = 258,
+    TYPENAME = 259,
+    SEMICOLON = 260,
+    COLON = 261,
+    COMMA = 262,
+    PIPE = 263,
+    PLUS = 264,
+    MINUS = 265,
+    MULTIPLY = 266,
+    DIVIDE = 267,
+    MODULO = 268,
+    LBRACKET = 269,
+    RBRACKET = 270,
+    RARROW = 271,
+    LARROW = 272,
+    OP_LT = 273,
+    OP_LE = 274,
+    OP_GT = 275,
+    OP_GE = 276,
+    OP_EQ = 277,
+    OP_NEQ = 278,
+    REAL = 279,
+    INT = 280,
+    IDENTIFIER = 281,
+    KW_PUB = 282,
+    KW_PRI = 283,
+    KW_VAR = 284,
+    KW_PTR = 285,
+    KW_VOID = 286,
+    KW_INT = 287,
+    KW_REAL = 288,
+    KW_TEXT = 289,
+    KW_BOOL = 290,
+    KW_BEGIN = 291,
+    KW_END = 292,
+    KW_IF = 293,
+    KW_THEN = 294,
+    KW_ELSE = 295,
+    KW_ELSEIF = 296,
+    KW_REPEAT = 297,
+    KW_FROM = 298,
+    KW_TO = 299,
+    KW_UNTIL = 300,
+    KW_WHILE = 301,
+    KW_DO = 302
+  };
+#endif
+
+/* Value type.  */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+
+union YYSTYPE
+{
+#line 44 "trainscript/trainscript.y" /* yacc.c:1909  */
+
+    float fval;
+	int ival;
+	char *text;
+	int indentation;
+	trainscript::Type type;
+	VariableDeclaration varDecl;
+	MethodDeclaration method;
+	MethodBody *body;
+	MethodHeader methodHeader;
+	trainscript::Instruction *instruction;
+	LocalVariable *local;
+	ExpressionList *expressions;
+
+#line 117 "trainscript/trainscript.tab.hpp" /* yacc.c:1909  */
+};
+
+typedef union YYSTYPE YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+
+int yyparse (ParserData * context);
+
+#endif /* !YY_YY_TRAINSCRIPT_TRAINSCRIPT_TAB_HPP_INCLUDED  */

trainscript/trainscript.y

@@ -400,13 +400,13 @@ typeName:
 
 void yyerror(void *scanner, const char *s) {
 	if(scanner == nullptr) {
-		printf("Error: %s\n", s);
+		kprintf("Error: %s\n", s);
 		return;
 	}
 	int line = 0; // yyget_lineno(scanner);
 	int col = 0; //yyget_column(scanner);
 	char *text = yyget_text(scanner);
-	printf(
+	kprintf(
 		"[%d:%d] Error: %s at '%s'\n",
 		line, col,
 		s,

trainscript/tsvm.cpp

@@ -1,11 +1,13 @@
+extern "C"  {
 #include <stdlib.h>
-#include <string.h>
+#include <console.h>
+}
 
 #include "common.h"
 
 #include "tsvm.hpp"
 
-#include "trainscript.tab.h"
+#include "trainscript.tab.hpp"
 #include "trainscript.l.h"
 
 namespace trainscript
@@ -74,39 +76,29 @@ namespace trainscript
 		}
 	}
 
-	Variable Method::invoke(std::vector<Variable> arguments)
+	Variable Method::invoke(ker::Vector<Variable> arguments)
 	{
 		LocalContext context(this->module);
 
 		for(auto var : this->module->variables)
 		{
-			context.insert({ var.first, var.second });
+			context.add(var.first, var.second);
 		}
 
 		if(this->returnValue.second.type.usable()) {
-			context.insert({ this->returnValue.first, &this->returnValue.second });
+			context.add(this->returnValue.first, &this->returnValue.second);
 		}
-		if(arguments.size() != this->arguments.size()) {
-			printf("MECKER anzahl!\n");
-			return Variable();
+		if(arguments.length() != this->arguments.length()) {
+			return Variable::Invalid;
 		}
-		for(size_t i = 0; i < this->arguments.size(); i++) {
+		for(size_t i = 0; i < this->arguments.length(); i++) {
 			if(this->arguments[i].second.type != arguments[i].type) {
-				printf("MECKER argtyp!\n");
-				return Variable();
+				return Variable::Invalid;
 			}
-			context.insert({this->arguments[i].first, new Variable(arguments[i]) });
+			context.add(this->arguments[i].first, new Variable(arguments[i]));
 		}
 		for(auto local : this->locals) {
-			context.insert({ local.first, new Variable(local.second) });
-		}
-
-		if(verbose) {
-			printf("executing with local context:\n");
-			for(auto &ref : context)
-			{
-				printf("  %s : %s\n", ref.first.c_str(), typeName(ref.second->type.id));
-			}
+			context.add(local.first, new Variable(local.second));
 		}
 
 		this->block->execute(context);
@@ -123,7 +115,7 @@ namespace trainscript
 			switch(lhs.type.id) {
 				case TypeID::Int:return  mkvar(lhs.integer + rhs.integer);
 				case TypeID::Real: return mkvar(lhs.real + rhs.real);
-				default: printf("addition not supported for %s.\n", typeName(lhs.type.id)); break;
+				default: kprintf("addition not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
 			}
 		}
 
@@ -132,7 +124,7 @@ namespace trainscript
 			switch(lhs.type.id) {
 				case TypeID::Int: return mkvar(lhs.integer - rhs.integer);
 				case TypeID::Real:return  mkvar(lhs.real - rhs.real);
-				default: printf("subtraction not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
+				default: kprintf("subtraction not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
 			}
 		}
 
@@ -141,7 +133,7 @@ namespace trainscript
 			switch(lhs.type.id) {
 				case TypeID::Int: return mkvar(lhs.integer * rhs.integer);
 				case TypeID::Real: return mkvar(lhs.real * rhs.real);
-				default: printf("multiplication not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
+				default: kprintf("multiplication not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
 			}
 		}
 
@@ -150,7 +142,7 @@ namespace trainscript
 			switch(lhs.type.id) {
 				case TypeID::Int: return mkvar(lhs.integer / rhs.integer);
 				case TypeID::Real: return mkvar(lhs.real / rhs.real);
-				default: printf("division not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
+				default: kprintf("division not supported for %s.\n", typeName(lhs.type.id)); return Variable::Invalid;
 			}
 		}
 
@@ -159,7 +151,7 @@ namespace trainscript
 			switch(lhs.type.id) {
 				case TypeID::Int: return mkvar(lhs.integer % rhs.integer);
 				// case TypeID::Real: mkvar(lhs.real % rhs.real);
-				default: printf("modulo not supported for %s.\n", typeName(lhs.type.id));  return Variable::Invalid;
+				default: kprintf("modulo not supported for %s.\n", typeName(lhs.type.id));  return Variable::Invalid;
 			}
 		}
 
@@ -170,7 +162,7 @@ namespace trainscript
 				case TypeID::Real: return mkbool(lhs.real == rhs.real);
 				case TypeID::Bool: return mkbool(lhs.boolean == rhs.boolean);
 				default:
-					printf("equals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("equals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}
@@ -182,7 +174,7 @@ namespace trainscript
 				case TypeID::Real: return mkbool(lhs.real != rhs.real);
 				case TypeID::Bool: return mkbool(lhs.boolean != rhs.boolean);
 				default:
-					printf("inequals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("inequals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}
@@ -194,7 +186,7 @@ namespace trainscript
 				case TypeID::Int: return mkbool(lhs.integer < rhs.integer);
 				case TypeID::Real: return mkbool(lhs.real < rhs.real);
 				default:
-					printf("equals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("equals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}
@@ -205,7 +197,7 @@ namespace trainscript
 				case TypeID::Int: return mkbool(lhs.integer <= rhs.integer);
 				case TypeID::Real: return mkbool(lhs.real <= rhs.real);
 				default:
-					printf("equals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("equals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}
@@ -216,7 +208,7 @@ namespace trainscript
 				case TypeID::Int: return mkbool(lhs.integer > rhs.integer);
 				case TypeID::Real: return mkbool(lhs.real > rhs.real);
 				default:
-					printf("equals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("equals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}
@@ -227,7 +219,7 @@ namespace trainscript
 				case TypeID::Int: return mkbool(lhs.integer >= rhs.integer);
 				case TypeID::Real: return mkbool(lhs.real >= rhs.real);
 				default:
-					printf("equals not supported for %s.\n", typeName(lhs.type.id));
+					kprintf("equals not supported for %s.\n", typeName(lhs.type.id));
 					return Variable::Invalid;
 			}
 		}

trainscript/tsvm.hpp

@@ -1,9 +1,18 @@
 #pragma once
 
-#include <map>
-#include <string>
-#include <vector>
-#include <string.h>
+extern "C" {
+#include <stdlib.h>
+#include <console.h>
+}
+
+// #include <map>
+
+#include <ker/string.hpp>
+#include <ker/vector.hpp>
+#include <ker/dictionary.hpp>
+
+// #include <vector>
+// #include <string.h>
 
 #include "typeid.hpp"
 
@@ -32,7 +41,6 @@ namespace trainscript
 		}
 
 		Type dereference() const {
-			if(pointer == 0) throw std::exception();
 			return { id, pointer - 1 };
 		}
 
@@ -72,10 +80,10 @@ namespace trainscript
 		void printval() const
 		{
 			switch(this->type.id) {
-				case TypeID::Int: printf("%d", this->integer); break;
-				case TypeID::Real: printf("%f", this->real); break;
-				case TypeID::Bool: printf("%s", this->boolean ? "TRUE" : "FALSE"); break;
-				default: printf("???"); break;
+				case TypeID::Int: kprintf("%d", this->integer); break;
+				case TypeID::Real: kprintf("%f", this->real); break;
+				case TypeID::Bool: kprintf("%s", this->boolean ? "TRUE" : "FALSE"); break;
+				default: kprintf("???"); break;
 			}
 		}
 
@@ -107,33 +115,24 @@ namespace trainscript
 
 	class Module;
 
-	class LocalContext :
-			public std::map<std::string, Variable*>
+	class LocalContext  :
+			public ker::Dictionary<ker::String, Variable*>
 	{
 	public:
 		Module * const module = nullptr;
 
 		LocalContext(Module *mod) :
-			std::map<std::string, Variable*>(),
+			ker::Dictionary<ker::String, Variable*>(),
 			module(mod)
 		{
 
 		}
 
-		int depth;
-
-		LocalContext() : depth(0) { }
-
-		void indent() {
-			for(int i = 0; i < depth; i++) printf("  ");
-		}
-
-		Variable *get(const std::string &name)
+		Variable *get(const ker::String &name)
 		{
-			if(this->count(name) > 0) {
+			if(this->contains(name)) {
 				return this->at(name);
 			} else {
-				printf("Variable %s not found!\n", name.c_str());
 				return nullptr;
 			}
 		}
@@ -151,7 +150,7 @@ namespace trainscript
 			public Instruction
 	{
 	public:
-		std::vector<Instruction*> instructions;
+		ker::Vector<Instruction*> instructions;
 
 		~Block() {
 			for(auto *instr : instructions) delete instr;
@@ -171,23 +170,23 @@ namespace trainscript
 		Module *module;
 		Instruction *block;
 		bool isPublic;
-		std::vector<std::pair<std::string, Variable>> arguments;
-		std::map<std::string, Variable> locals;
-		std::pair<std::string, Variable> returnValue;
+		ker::Vector<ker::Pair<ker::String, Variable>> arguments;
+		ker::Dictionary<ker::String, Variable> locals;
+		ker::Pair<ker::String, Variable> returnValue;
 
 		Method(Module *module, Instruction *block) : module(module), block(block)
 		{
 
 		}
 
-		Variable invoke(std::vector<Variable> arguments);
+		Variable invoke(ker::Vector<Variable> arguments);
 	};
 
 	class Module
 	{
 	public:
-		std::map<std::string, Variable*> variables;
-		std::map<std::string, Method*> methods;
+		ker::Dictionary<ker::String, Variable*> variables;
+		ker::Dictionary<ker::String, Method*> methods;
 	public:
 		Module();
 		~Module();
@@ -225,12 +224,6 @@ namespace trainscript
 		ConstantExpression(Variable value) : value(value) { }
 
 		Variable execute(LocalContext &context) const override {
-			if(verbose) {
-				context.indent();
-				printf("constant: ");
-				this->value.printval();
-				printf("\n");
-			}
 			return this->value;
 		}
 	};
@@ -239,15 +232,10 @@ namespace trainscript
 			public Instruction
 	{
 	public:
-		std::string variableName;
-		VariableExpression(std::string variableName) : variableName(variableName) { }
+		ker::String variableName;
+		VariableExpression(ker::String variableName) : variableName(variableName) { }
 
 		Variable execute(LocalContext &context) const override {
-			if(verbose) {
-				context.indent();
-				printf("variable: %s\n", this->variableName.c_str());
-			}
-
 			auto *var = context.get(this->variableName);
 			if(var == nullptr) {
 				return Variable::Invalid;
@@ -261,9 +249,9 @@ namespace trainscript
 			public Instruction
 	{
 	public:
-		std::string variableName;
+		ker::String variableName;
 		Instruction *expression;
-		VariableAssignmentExpression(std::string variableName, Instruction *expression) :
+		VariableAssignmentExpression(ker::String variableName, Instruction *expression) :
 			variableName(variableName),
 			expression(expression)
 		{
@@ -272,19 +260,9 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override {
 			if(this->expression == nullptr) {
-				if(verbose) printf("Invalid instruction in assignment.\n");
 				return Variable::Invalid;
 			}
-			if(verbose) context.depth++;
 			Variable result = this->expression->execute(context);
-			if(verbose) context.depth--;
-
-			if(verbose) {
-				context.indent();
-				printf("assign ");
-				result.printval();
-				printf(" to %s\n", this->variableName.c_str());
-			}
 
 			Variable *target = context.get(this->variableName);
 			if(target == nullptr) {
@@ -292,10 +270,6 @@ namespace trainscript
 			}
 
 			if(target->type != result.type) {
-				if(verbose) printf(
-					"Assignment does not match: %s → %s\n",
-					typeName(result.type.id),
-					this->variableName.c_str());
 				return Variable::Invalid;
 			}
 
@@ -303,7 +277,7 @@ namespace trainscript
 				case TypeID::Int: target->integer = result.integer; break;
 				case TypeID::Real: target->real = result.real; break;
 				case TypeID::Bool: target->boolean = result.boolean; break;
-				default: if(verbose) printf("assignment not supported.\n"); break;
+				default: break;
 			}
 
 			return result;
@@ -314,10 +288,10 @@ namespace trainscript
 			public Instruction
 	{
 	public:
-		std::string methodName;
-		std::vector<Instruction*> parameters;
+		ker::String methodName;
+		ker::Vector<Instruction*> parameters;
 
-		MethodInvokeExpression(std::string methodName) :
+		MethodInvokeExpression(ker::String methodName) :
 			methodName(methodName)
 		{
 
@@ -325,18 +299,16 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override
 		{
-			Method *method = context.module->method(this->methodName.c_str());
+			Method *method = context.module->method(this->methodName.str());
 			if(method == nullptr) {
-				if(verbose) printf("method %s not found!\n", this->methodName.c_str());
 				return Variable::Invalid;
 			}
 
-			if(verbose) context.depth++;
-			std::vector<Variable> vars(this->parameters.size());
-			for(int i =  0; i < vars.size(); i++) {
+			ker::Vector<Variable> vars(this->parameters.length());
+			vars.resize(this->parameters.length());
+			for(size_t i =  0; i < vars.length(); i++) {
 				vars[i] = this->parameters.at(i)->execute(context);
 			}
-			if(verbose) context.depth--;
 
 			return method->invoke(vars);
 		}
@@ -347,7 +319,7 @@ namespace trainscript
 			public Instruction
 	{
 	public:
-		Instruction *rhs, *lhs;
+		Instruction *lhs, *rhs;
 
 		ArithmeticExpression(Instruction *lhs, Instruction *rhs) :
 			lhs(lhs),
@@ -358,36 +330,19 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override {
 			if(this->lhs == nullptr) {
-				if(verbose) printf("lhs: Invalid instruction in addition.\n");
 				return Variable::Invalid;
 			}
 			if(this->rhs == nullptr) {
-				if(verbose) printf("rhs: Invalid instruction in addition.\n");
 				return Variable::Invalid;
 			}
 
-			if(verbose) context.depth++;
 			Variable left = this->lhs->execute(context);
 			Variable right = this->rhs->execute(context);
-			if(verbose) context.depth--;
 
 			if(left.type != right.type) {
-				if(verbose) printf(
-					"Arithmetic types do not match: %s != %s\n",
-					typeName(left.type.id),
-					typeName(right.type.id));
 				return Variable::Invalid;
 			}
 
-			if(verbose) {
-				context.indent();
-				printf("Arithmetic on ");
-				left.printval();
-				printf(" and ");
-				right.printval();
-				printf("\n");
-			}
-
 			return OP(left, right);
 		}
 	};
@@ -410,13 +365,11 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override {
 			if(this->condition == nullptr) {
-				if(verbose) printf("IF: missing condition.\n");
 				return Variable::Invalid;
 			}
 
 			Variable result = this->condition->execute(context);
 			if(result.type != Type::Boolean) {
-				if(verbose) printf("IF: Invalid condition type.\n");
 				return Variable::Invalid;
 			}
 			if((result.boolean == true) && (this->blockTrue != nullptr)) {
@@ -443,7 +396,6 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override {
 			if(this->block == nullptr) {
-				if(verbose) printf("REPEAT: missing block.\n");
 				return Variable::Invalid;
 			}
 
@@ -473,23 +425,18 @@ namespace trainscript
 
 		Variable execute(LocalContext &context) const override {
 			if(this->condition == nullptr) {
-				if(verbose) printf("REPEAT: missing condition.\n");
 				return Variable::Invalid;
 			}
 			if(this->block == nullptr) {
-				if(verbose) printf("REPEAT: missing block.\n");
 				return Variable::Invalid;
 			}
 
 			while(true)
 			{
 				Variable cond = this->condition->execute(context);
-
 				if(cond.type != Type::Boolean) {
-					printf("REPEAT: Invalid expression type.\n");
 					return Variable::Invalid;
 				}
-
 				if(cond.boolean == false) {
 					break;
 				}