Rebase: Fixed console -> syslog interface

When size=0 was passed to memset() or memcpy(), the loop bound
`0 to size-1` underflowed to $FFFFFFFF, iterating ~4 billion times
and causing an immediate page fault.

Added `if size = 0 then exit` guards to both memset() and memcpy()
in util.pas.

Also guarded all `for i:=0 to X-1` loops in strings.pas where X
could be 0 on empty string inputs:
- stringToUpper: wrap loop in `if stringSize > 0`
- stringToLower: wrap loop in `if stringSize > 0`
- stringEquals: early exit when both sizes are 0
- stringToInt: early exit when string is empty

Additionally fixed all previously identified bugs in strings.pas:
- hexStringToInt: guard against empty string underflow
- stringConcat: cache stringSize calls to avoid redundant O(n) scans
- stringTrim: clamp length to source string size
- stringSub: bounds check start/size against source length
- stringReplace: complete rewrite - was using stringEquals() for
  substring matching (only matched at string end), dropped prefix
  chars, had dangling assignment overwriting valid result with
  uninitialized pointer, and had unused variable
- stringIndexOf: rewritten to use new stringMatchAt() helper for
  correct substring matching
- stringContains: simplified to delegate to fixed stringIndexOf(),
  also fixing uint32 underflow when sub was empty
- stringToInt: removed always-true `v >= 0` check on uint32
- intToString: implemented (was a stub returning ' ')
- Added stringMatchAt() helper for prefix comparison
- Added comprehensive UnitTest procedure with 77 assertions
  including adversarial empty/nil/boundary inputs

compile_lvgl.sh

@@ -107,9 +107,10 @@ fi
 
 # Copy source + objects to /lvgl host mount for debugging
 echo "Copying LVGL source and objects to host mount..."
-rm -rf /lvgl/* /lvgl/.[!.]* /lvgl/..?* 2>/dev/null || true
-cp -a "$LVGL_DIR/src" /lvgl/src
-cp -a "$OBJ_DIR" /lvgl/obj
+mkdir /code/lvgl 2>/dev/null || true
+rm -rf /code/lvgl/* /code/lvgl/.[!.]* /code/lvgl/..?* 2>/dev/null || true
+cp -a "$LVGL_DIR/src" /code/lvgl/src
+cp -a "$OBJ_DIR" /code/lvgl/obj
 echo "Done."
 
 echo " "

docker-compose.yml

@@ -2,5 +2,4 @@ services:
   builder:
     build: .
     volumes:
-      - .:/code
-      - ./lvgl:/lvgl
+      - .:/code

src/driver/bus/EHCI.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     tracer,
-    Console,
+    syslog,
     PCI,
     drivertypes,
     pmemorymanager,
@@ -44,19 +44,19 @@ var
 begin
     tracer.push_trace('EHCI.load');
     devices:= PCI.getDeviceInfo($0C, $03, $20, count);
-    console.output('USB-EHCI Driver', 'Found ');
-    console.writeint(count);
-    console.writestringln(' USB Controller(s).');
+    syslog.log('USB-EHCI Driver', 'Found ');
+    syslog.writeint(count);
+    syslog.writestringln(' USB Controller(s).');
     if count > 0 then begin
         for i:=0 to count-1 do begin
-            console.output('USB-EHCI Driver', 'Controller[');
-            console.writeint(i);
-            console.writestring(']: ');
-            console.writehex(devices[i].device_id);
-            console.writestring(' ');
-            console.writehex(devices[i].vendor_id);
-            console.writestring(' ');
-            console.writehexln(devices[i].prog_if);
+            syslog.log('USB-EHCI Driver', 'Controller[');
+            syslog.writeint(i);
+            syslog.writestring(']: ');
+            syslog.writehex(devices[i].device_id);
+            syslog.writestring(' ');
+            syslog.writehex(devices[i].vendor_id);
+            syslog.writestring(' ');
+            syslog.writehexln(devices[i].prog_if);
         end;
     end;
     load:= true;

src/driver/bus/OHCI.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     tracer,
-    Console,
+    syslog,
     PCI,
     drivertypes,
     pmemorymanager,
@@ -71,19 +71,19 @@ var
 begin
     tracer.push_trace('OHCI.load');
     devices:= PCI.getDeviceInfo($0C, $03, $10, count);
-    console.output('USB-OHCI Driver', 'Found ');
-    console.writeint(count);
-    console.writestringln(' USB Controller(s).');
+    syslog.log('USB-OHCI Driver', 'Found ');
+    syslog.writeint(count);
+    syslog.writestringln(' USB Controller(s).');
     if count > 0 then begin
         for i:=0 to count-1 do begin
-            console.output('USB-OHCI Driver', 'Controller[');
-            console.writeint(i);
-            console.writestring(']: ');
-            console.writehex(devices[i].device_id);
-            console.writestring(' ');
-            console.writehex(devices[i].vendor_id);
-            console.writestring(' ');
-            console.writehexln(devices[i].prog_if);
+            syslog.log('USB-OHCI Driver', 'Controller[');
+            syslog.writeint(i);
+            syslog.writestring(']: ');
+            syslog.writehex(devices[i].device_id);
+            syslog.writestring(' ');
+            syslog.writehex(devices[i].vendor_id);
+            syslog.writestring(' ');
+            syslog.writehexln(devices[i].prog_if);
             block:= devices[i].address0 SHR 22;
             force_alloc_block(block, 0);
             map_page(block, block);

src/driver/bus/PCI.pas

@@ -25,7 +25,7 @@ interface
 uses
     tracer,
     util,
-    console,
+    syslog,
     drivertypes,
     lmemorymanager, 
     vmemorymanager,
@@ -100,14 +100,14 @@ var
 
 begin
     push_trace('PCI.load');
-    console.outputln('PCI', 'Scanning Bus: 0');
+    syslog.logln('PCI', 'Scanning Bus: 0');
     scanBus(0);
     //while unscanned busses scan busses
     current_bus := 1;
     while true do begin
         if current_bus < bus_count then begin
-            console.output('PCI', 'Scanning Bus: ');
-            console.writeintln(bus_count);
+            syslog.log('PCI', 'Scanning Bus: ');
+            syslog.writeintln(bus_count);
             scanBus(current_bus);
             current_bus := current_bus + 1;
         end else break;
@@ -122,7 +122,7 @@ var
 
 begin
     push_trace('PCI.init');
-    console.outputln('PCI','INIT BEGIN.');
+    syslog.logln('PCI','INIT BEGIN.');
     DevID.Bus:= biUnknown;
     DevID.id0:= 0;
     DevID.id1:= 0;
@@ -130,7 +130,7 @@ begin
     DevID.id3:= 0;
     DevID.ex:= nil;
     drivermanagement.register_driver_ex('PCI Driver', @DevID, @load, true);
-    console.outputln('PCI', 'INIT END.');
+    syslog.logln('PCI', 'INIT END.');
     pop_trace;
 end;
 
@@ -388,16 +388,16 @@ begin
             DevID^.id4:= device.vendor_id;
             DevID^.ex:= nil;
 
-            console.output('PCI', 'Found Device: ');
-            console.writehex(device.header_type);
-            console.writestring('  ');
-            console.writehex(device.device_id);        
-            console.writestring('  ');        
-            console.writehex(device.class_code);        
-            console.writestring('  ');
-            console.writehex(device.subclass_class);        
-            console.writestring('  ');
-            console.writehexln(device.prog_if);
+            syslog.log('PCI', 'Found Device: ');
+            syslog.writehex(device.header_type);
+            syslog.writestring('  ');
+            syslog.writehex(device.device_id);        
+            syslog.writestring('  ');        
+            syslog.writehex(device.class_code);        
+            syslog.writestring('  ');
+            syslog.writehex(device.subclass_class);        
+            syslog.writestring('  ');
+            syslog.writehexln(device.prog_if);
 
             devices[device_count] := device;
             device_count := device_count + 1;

src/driver/bus/UHCI.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     tracer,
-    Console,
+    syslog,
     PCI,
     drivertypes,
     pmemorymanager,
@@ -44,19 +44,19 @@ var
 begin
     tracer.push_trace('UHCI.load');
     devices:= PCI.getDeviceInfo($0C, $03, $00, count);
-    console.output('USB-UHCI Driver','Found ');
-    console.writeint(count);
-    console.writestringln(' USB Controller(s).');
+    syslog.log('USB-UHCI Driver','Found ');
+    syslog.writeint(count);
+    syslog.writestringln(' USB Controller(s).');
     if count > 0 then begin
         for i:=0 to count-1 do begin
-            console.output('USB-UHCI Driver','Controller[');
-            console.writeint(i);
-            console.writestring(']: ');
-            console.writehex(devices[i].device_id);
-            console.writestring(' ');
-            console.writehex(devices[i].vendor_id);
-            console.writestring(' ');
-            console.writehexln(devices[i].prog_if);
+            syslog.log('USB-UHCI Driver','Controller[');
+            syslog.writeint(i);
+            syslog.writestring(']: ');
+            syslog.writehex(devices[i].device_id);
+            syslog.writestring(' ');
+            syslog.writehex(devices[i].vendor_id);
+            syslog.writestring(' ');
+            syslog.writehexln(devices[i].prog_if);
         end;
     end;
     load:= true;

src/driver/bus/USB.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     tracer,
-    Console,
+    syslog,
     PCI,
     drivertypes,
     pmemorymanager,
@@ -69,7 +69,7 @@ var
 
 begin
     push_trace('USB.init');
-    console.outputln('USB Driver', 'INIT BEGIN.');
+    syslog.logln('USB Driver', 'INIT BEGIN.');
     
     UHCI_ID.Bus:= biPCI;
     UHCI_ID.id0:= idANY;
@@ -108,7 +108,7 @@ begin
     drivermanagement.register_driver('USB-EHCI Driver', @EHCI_ID, @loadEHCI);
     drivermanagement.register_driver('USB-XHCI Driver', @XHCI_ID, @loadXHCI);
 
-    console.outputln('USB Driver', 'INIT END.');
+    syslog.logln('USB Driver', 'INIT END.');
     pop_trace;
 end;
 

src/driver/bus/XHCI.pas

@@ -23,7 +23,7 @@ interface
 
 uses
     tracer,
-    Console,
+    syslog,
     PCI,
     drivertypes,
     pmemorymanager,
@@ -44,19 +44,19 @@ var
 begin
     tracer.push_trace('XHCI.load');
     devices:= PCI.getDeviceInfo($0C, $03, $30, count);
-    console.output('USB-XHCI Driver', 'Found ');
-    console.writeint(count);
-    console.writestringln(' USB Controller(s).');
+    syslog.log('USB-XHCI Driver', 'Found ');
+    syslog.writeint(count);
+    syslog.writestringln(' USB Controller(s).');
     if count > 0 then begin
         for i:=0 to count-1 do begin
-            console.output('USB-XHCI Driver', 'Controller[');
-            console.writeint(i);
-            console.writestring(']: ');
-            console.writehex(devices[i].device_id);
-            console.writestring(' ');
-            console.writehex(devices[i].vendor_id);
-            console.writestring(' ');
-            console.writehexln(devices[i].prog_if);
+            syslog.log('USB-XHCI Driver', 'Controller[');
+            syslog.writeint(i);
+            syslog.writestring(']: ');
+            syslog.writehex(devices[i].device_id);
+            syslog.writestring(' ');
+            syslog.writehex(devices[i].vendor_id);
+            syslog.writestring(' ');
+            syslog.writehexln(devices[i].prog_if);
         end;
     end;
     load:= true;

src/driver/exp/testdriver.pas

@@ -22,7 +22,7 @@ unit testdriver;
 interface
 
 uses
-    tracer, console, drivermanagement;
+    tracer, syslog, drivermanagement;
 
 procedure init;
 
@@ -31,7 +31,7 @@ implementation
 function load(ptr : void) : boolean;
 begin
     push_trace('testdriver.load');
-    console.outputln('DUMMY DRIVER', 'LOADED.');
+    syslog.logln('DUMMY DRIVER', 'LOADED.');
     pop_trace;
 end;
 

src/driver/hid/PS2_KEYBOARD_ISR.pas

@@ -24,7 +24,6 @@ interface
 
 uses
     util,
-    console,
     isr_types,
     isrmanager,
     IDT;

src/driver/hid/keyboard.pas

@@ -22,7 +22,7 @@ unit keyboard;
 interface
 
 uses 
-    console,
+    syslog,
     util,
     PS2_KEYBOARD_ISR;
 
@@ -94,7 +94,7 @@ function load(ptr : void) : boolean;
 begin
     PS2_KEYBOARD_ISR.register();
     PS2_KEYBOARD_ISR.hook(uint32(@callback));
-    console.outputln('PS/2 KEYBOARD', 'LOADED.');
+    syslog.logln('PS/2 KEYBOARD', 'LOADED.');
     load:= true;
 end;
 
@@ -103,7 +103,7 @@ var
     devid : TDeviceIdentifier;
 
 begin
-    console.outputln('PS/2 KEYBOARD', 'INIT BEGIN.');
+    syslog.logln('PS/2 KEYBOARD', 'INIT BEGIN.');
     if keyboard_layout[1].key_code = 0 then lang_USA();
     devid.bus:= biUnknown;
     devid.id0:= 0;
@@ -113,7 +113,7 @@ begin
     devid.id4:= 0;
     devid.ex:= nil;
     drivermanagement.register_driver_ex('PS/2 Keyboard', @devid, @load, true);
-    console.outputln('PS/2 KEYBOARD', 'INIT END.');
+    syslog.logln('PS/2 KEYBOARD', 'INIT END.');
 end;
 //2A AA
 

src/driver/interface/serial.pas

@@ -40,8 +40,7 @@ function sinb(port : uint16) : uint8;
 
 implementation
 
-uses
-    console;
+{ no implementation uses }
 
 procedure soutb(port : uint16; val : uint8);
 begin

src/driver/net/include/netutils.pas

@@ -22,16 +22,16 @@ unit netutils;
 interface
 
 uses
-    tracer, util, nettypes, console, lmemorymanager, lists, strings;
+    tracer, util, nettypes, stdio, lmemorymanager, lists, strings;
 
 procedure copyMAC(src : puint8; dst : puint8);
 procedure copyIPv4(src : puint8; dst : puint8);
 function  stringToMAC(str : pchar) : puint8;
 function  stringToIPv4(str : pchar) : puint8;
-procedure writeMACAddress(mac : puint8; WND : HWND);
-procedure writeIPv4Address(ip : puint8; WND : HWND);
-procedure writeMACAddressEx(mac : puint8; WND : HWND);
-procedure writeIPv4AddressEx(ip : puint8; WND : HWND);
+procedure writeMACAddress(mac : puint8; outbuf : POutBuf);
+procedure writeIPv4Address(ip : puint8; outbuf : POutBuf);
+procedure writeMACAddressEx(mac : puint8; outbuf : POutBuf);
+procedure writeIPv4AddressEx(ip : puint8; outbuf : POutBuf);
 function MACEqual(mac1 : puint8; mac2 : puint8) : boolean;
 function IPEqual(ip1 : puint8; ip2 : puint8) : boolean;
 function newPacketContext : PPacketContext;
@@ -172,59 +172,59 @@ begin
     pop_trace;
 end;
 
-procedure writeIPv4AddressEx(ip : puint8; WND : HWND);
+procedure writeIPv4AddressEx(ip : puint8; outbuf : POutBuf);
 var
     i : integer;
 
 begin
     push_trace('netutils.writeIPv4Address');
-    console.writeintWND(ip[0], WND);
+    stdio.bufWriteInt(outbuf, ip[0]);
     for i:=1 to 3 do begin
-        console.writestringWND('.', WND);
-        console.writeintWND(ip[i], WND);
+        stdio.bufWriteStr(outbuf, '.');
+        stdio.bufWriteInt(outbuf, ip[i]);
     end; 
 end;
 
-procedure writeMACAddressEx(mac : puint8; WND : HWND);
+procedure writeMACAddressEx(mac : puint8; outbuf : POutBuf);
 var
     i : integer;
 
 begin
     push_trace('netutils.writeMACAddress');
-    console.writehexpairWND(mac[0], WND);
+    stdio.bufWriteHexPair(outbuf, mac[0]);
     for i:=1 to 5 do begin
-        console.writestringWND(':', WND);
-        console.writehexpairWND(mac[i], WND);
+        stdio.bufWriteStr(outbuf, ':');
+        stdio.bufWriteHexPair(outbuf, mac[i]);
     end;
 end;
 
-procedure writeIPv4Address(ip : puint8; WND : HWND);
+procedure writeIPv4Address(ip : puint8; outbuf : POutBuf);
 var
     i : integer;
 
 begin
     push_trace('netutils.writeIPv4Address');
-    console.writeintWND(ip[0], WND);
+    stdio.bufWriteInt(outbuf, ip[0]);
     for i:=1 to 3 do begin
-        console.writestringWND('.', WND);
-        console.writeintWND(ip[i], WND);
+        stdio.bufWriteStr(outbuf, '.');
+        stdio.bufWriteInt(outbuf, ip[i]);
     end;
-    console.writestringlnWND(' ', WND);   
+    stdio.bufWriteStrLn(outbuf, ' ');   
     pop_trace;
 end;
 
-procedure writeMACAddress(mac : puint8; WND : HWND);
+procedure writeMACAddress(mac : puint8; outbuf : POutBuf);
 var
     i : integer;
 
 begin
     push_trace('netutils.writeMACAddress');
-    console.writehexpairWND(mac[0], WND);
+    stdio.bufWriteHexPair(outbuf, mac[0]);
     for i:=1 to 5 do begin
-        console.writestringWND(':', WND);
-        console.writehexpairWND(mac[i], WND);
+        stdio.bufWriteStr(outbuf, ':');
+        stdio.bufWriteHexPair(outbuf, mac[i]);
     end;
-    console.writestringlnWND(' ', WND);
+    stdio.bufWriteStrLn(outbuf, ' ');
     pop_trace;
 end;
 

src/driver/net/l1/net.pas

@@ -23,9 +23,8 @@ interface
 
 uses
     tracer,
-    console,
     nettypes, netutils,
-    netlog,
+    syslog,
     RTC;
 
 procedure init;
@@ -39,8 +38,7 @@ procedure writeToLogLn(str : pchar);
 
 implementation
 
-uses
-    terminal,   
+uses  
     e1000,              //dev
     eth2,               //L2
     arp, ipv4,          //L3
@@ -57,32 +55,28 @@ var
     DateTime : TDateTime;
 
 begin
-    if getNetlogHWND <> 0 then begin
-        DateTime:= getDateTime;
-        writeStringWND('[', getNetlogHWND);
+    DateTime:= getDateTime;
+    syslog.writestring('[');
 
-        if DateTime.Hours < 10 then writeIntWND(0, getNetlogHWND);
-        writeIntWND(DateTime.Hours, getNetlogHWND);
-        writeStringWND(':', getNetlogHWND);
-        
-        if DateTime.Minutes < 10 then writeIntWND(0, getNetlogHWND);
-        writeIntWND(DateTime.Minutes, getNetlogHWND);
-        writeStringWND(':', getNetlogHWND);
+    if DateTime.Hours < 10 then syslog.writeint(0);
+    syslog.writeint(DateTime.Hours);
+    syslog.writestring(':');
+    
+    if DateTime.Minutes < 10 then syslog.writeint(0);
+    syslog.writeint(DateTime.Minutes);
+    syslog.writestring(':');
 
-        if DateTime.Seconds < 10 then writeIntWND(0, getNetlogHWND);
-        writeIntWND(DateTime.Seconds, getNetlogHWND);
-        writeStringWND('] ', getNetlogHWND); 
+    if DateTime.Seconds < 10 then syslog.writeint(0);
+    syslog.writeint(DateTime.Seconds);
+    syslog.writestring('] '); 
 
-        writeStringWND(str, getNetlogHWND);
-    end;
+    syslog.writestring(str);
 end;
 
 procedure writeToLogLn(str : pchar);
 begin
     writeToLog(str);
-    if getNetlogHWND <> 0 then begin
-        writestringlnWND(' ', getNetlogHWND);
-    end;
+    syslog.writestringln(' ');
 end;
 
 procedure registerNetworkCard(SendCallback : TNetSendCallback; _MAC : puint8);

src/driver/net/l2/eth2.pas

@@ -24,10 +24,8 @@ interface
 uses
     lmemorymanager, util,
     tracer,
-    nettypes, netutils, terminal,
+    nettypes, netutils,
     net,
-    netlog,
-    console,
     crc;
 
 procedure send(p_data : void; p_len : uint16; eth_type : uint16; p_context : PPacketContext);