Fixed a few issues identified by Coverity:

* cpu/m6805: Removed unnecessary comparison that can't be true from
  'HC05 timer handler.
* machine/z80scc.cpp: Fixed flag test in logging.
* emu/devdelegate.h: Fixed use-after-move in functoid constructor.
* util/unzip.cpp: Fixed integer promotion issue in ZIP16 member header
  handling.
* util/xmlfile.cpp: Got rid of custom allocator functions that have
  alignment issues and no longer provide value.
* capcom/alien.cpp: Use machine().rand() for determinism.
* ensoniq/esqpanel.cpp: I/O stream eof() returns whether a read stopped
  short due to EOF, not whether the file pointer is at EOF.
* sega/sms.cpp: Fixed a few use-after-move errors.
* osd/modules/monitor: Fixed an apparent bug in what appears to be a
  setter member function.

src/devices/cpu/m6805/m68hc05.cpp

@@ -646,7 +646,7 @@ void m68hc05_device::burn_cycles(unsigned count)
 	unsigned const ps_mask((1 << ps_opt) - 1);
 	unsigned const increments((count + (m_prescaler & ps_mask)) >> ps_opt);
 	u32 const new_counter(u32(m_counter) + increments);
-	bool const timer_rollover((0x010000 > m_counter) && (0x010000 <= new_counter));
+	bool const timer_rollover(0x010000 <= new_counter);
 	bool const output_compare_match((m_ocr > m_counter) && (m_ocr <= new_counter));
 	m_prescaler = (count + m_prescaler) & ps_mask;
 	m_counter = u16(new_counter);

src/devices/machine/z80scc.cpp

@@ -1918,7 +1918,7 @@ void z80scc_channel::do_sccreg_wr1(uint8_t data)
 		LOG("- Receiver Interrupt on Special Conditions only\n");
 		break;
 	}
-	if ((data & WR1_RX_INT_MODE_MASK) == WR1_PARITY_IS_SPEC_COND)
+	if (data & WR1_PARITY_IS_SPEC_COND)
 		LOG("- Parity error is a Special Condition\n");
 	m_uart->check_interrupts();
 }

src/emu/devdelegate.h

@@ -211,7 +211,7 @@ public:
 	device_delegate(device_t &owner, T &&funcptr, std::enable_if_t<suitable_functoid<T>::value, char const *> name)
 		: basetype(std::forward<T>(funcptr), name)
 		, detail::device_delegate_helper(owner)
-	{ basetype::operator=(basetype(std::forward<T>(funcptr), name)); }
+	{ }
 
 	// setters that implicitly bind to the current device
 	template <class D> void set(ReturnType (D::*funcptr)(Params...), char const *name)

src/lib/util/unzip.cpp

@@ -593,17 +593,17 @@ public:
 		, m_compressed_size(header.compressed_size())
 		, m_header_offset(header.header_offset())
 		, m_start_disk(header.start_disk())
-		, m_offs_compressed_size(~m_uncompressed_size ? 0 : 8)
-		, m_offs_header_offset(m_offs_compressed_size + (~m_compressed_size ? 0 : 8))
-		, m_offs_start_disk(m_offs_header_offset + (~m_header_offset ? 0 : 8))
-		, m_offs_end(m_offs_start_disk + (~m_start_disk ? 0 : 4))
+		, m_offs_compressed_size((0xffff'ffffU != m_uncompressed_size) ? 0 : 8)
+		, m_offs_header_offset(m_offs_compressed_size + ((0xffff'ffffU != m_compressed_size) ? 0 : 8))
+		, m_offs_start_disk(m_offs_header_offset + ((0xffff'ffffU != m_header_offset) ? 0 : 8))
+		, m_offs_end(m_offs_start_disk + ((0xffffU != m_start_disk) ? 0 : 4))
 	{
 	}
 
-	std::uint64_t   uncompressed_size() const noexcept  { return ~m_uncompressed_size ? m_uncompressed_size : read_qword(0x00); }
-	std::uint64_t   compressed_size() const noexcept    { return ~m_compressed_size ? m_compressed_size : read_qword(m_offs_compressed_size); }
-	std::uint64_t   header_offset() const noexcept      { return ~m_header_offset ? m_header_offset : read_qword(m_offs_header_offset); }
-	std::uint32_t   start_disk() const noexcept         { return ~m_start_disk ? m_start_disk : read_dword(m_offs_start_disk); }
+	std::uint64_t   uncompressed_size() const noexcept  { return (0xffff'ffffU != m_uncompressed_size) ? m_uncompressed_size : read_qword(0x00); }
+	std::uint64_t   compressed_size() const noexcept    { return (0xffff'ffffU != m_compressed_size) ? m_compressed_size : read_qword(m_offs_compressed_size); }
+	std::uint64_t   header_offset() const noexcept      { return (0xffff'ffffU != m_header_offset) ? m_header_offset : read_qword(m_offs_header_offset); }
+	std::uint32_t   start_disk() const noexcept         { return (0xffffU != m_start_disk) ? m_start_disk : read_dword(m_offs_start_disk); }
 
 	std::size_t total_length() const noexcept { return minimum_length() + m_offs_end; }
 	static constexpr std::size_t minimum_length() { return 0x00; }

src/lib/util/xmlfile.cpp

@@ -807,49 +807,12 @@ const char *normalize_string(const char *string)
 //  EXPAT INTERFACES
 //**************************************************************************
 
-//-------------------------------------------------
-//  expat_malloc/expat_realloc/expat_free -
-//  wrappers for memory allocation functions so
-//  that they pass through out memory tracking
-//  systems
-//-------------------------------------------------
-
-static void *expat_malloc(size_t size)
-{
-	auto *result = (uint32_t *)malloc(size + 4 * sizeof(uint32_t));
-	*result = size;
-	return &result[4];
-}
-
-static void expat_free(void *ptr)
-{
-	if (ptr != nullptr)
-		free(&((uint32_t *)ptr)[-4]);
-}
-
-static void *expat_realloc(void *ptr, size_t size)
-{
-	void *newptr = expat_malloc(size);
-	if (newptr == nullptr)
-		return nullptr;
-	if (ptr != nullptr)
-	{
-		uint32_t oldsize = ((uint32_t *)ptr)[-4];
-		memcpy(newptr, ptr, oldsize);
-		expat_free(ptr);
-	}
-	return newptr;
-}
-
-
 //-------------------------------------------------
 //  expat_setup_parser - set up expat for parsing
 //-------------------------------------------------
 
 static bool expat_setup_parser(parse_info &info, parse_options const *opts)
 {
-	XML_Memory_Handling_Suite memcallbacks;
-
 	// setup info structure
 	memset(&info, 0, sizeof(info));
 	if (opts != nullptr)
@@ -870,11 +833,8 @@ static bool expat_setup_parser(parse_info &info, parse_options const *opts)
 	info.curnode = info.rootnode.get();
 
 	// create the XML parser
-	memcallbacks.malloc_fcn = expat_malloc;
-	memcallbacks.realloc_fcn = expat_realloc;
-	memcallbacks.free_fcn = expat_free;
-	info.parser = XML_ParserCreate_MM(nullptr, &memcallbacks, nullptr);
-	if (info.parser == nullptr)
+	info.parser = XML_ParserCreate(nullptr);
+	if (!info.parser)
 	{
 		info.rootnode.reset();
 		return false;

src/mame/capcom/alien.cpp

@@ -111,7 +111,7 @@ u32 alien_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, cons
 u8 alien_state::fpga_r()
 {
 	u8 fpga_type = 1; // 2 bit value
-	return (fpga_type << 5) | 0x10 | (rand() & 7); // status bits TODO
+	return (fpga_type << 5) | 0x10 | (machine().rand() & 7); // status bits TODO
 }
 
 void alien_state::alien_map(address_map &map)

src/mame/ensoniq/esqpanel.cpp

@@ -71,13 +71,13 @@ namespace esqpanel {
 				return 0;
 			}
 
+			int c;
+			while ((c = is.get()) != EOF)
+			{
+				int message_type = external_panel::get_message_type(char(uint8_t(unsigned(c))));
 				int n;
-			while (!is.eof()) {
-				char c = is.get();
-				int message_type = external_panel::get_message_type(c);
 				is >> n;
-				int send = (n != 0);
-				if (send)
+				if (n != 0)
 				{
 					m_send_message_types |= message_type;
 				}

src/mame/sega/sms.cpp

@@ -540,7 +540,7 @@ void sms_state::sms_ntsc_base(machine_config &config)
 template <typename X>
 void sms_state::screen_sms_pal_raw_params(screen_device &screen, X &&pixelclock)
 {
-	screen.set_raw(std::forward<X>(pixelclock),
+	screen.set_raw(pixelclock,
 		sega315_5124_device::WIDTH,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH - 2,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH + 256 + 10,
@@ -553,7 +553,7 @@ void sms_state::screen_sms_pal_raw_params(screen_device &screen, X &&pixelclock)
 template <typename X>
 void sms_state::screen_sms_ntsc_raw_params(screen_device &screen, X &&pixelclock)
 {
-	screen.set_raw(std::forward<X>(pixelclock),
+	screen.set_raw(pixelclock,
 		sega315_5124_device::WIDTH,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH - 2,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH + 256 + 10,
@@ -566,7 +566,7 @@ void sms_state::screen_sms_ntsc_raw_params(screen_device &screen, X &&pixelclock
 template <typename X>
 void gamegear_state::screen_gg_raw_params(screen_device &screen, X &&pixelclock)
 {
-	screen.set_raw(std::forward<X>(pixelclock),
+	screen.set_raw(pixelclock,
 		sega315_5124_device::WIDTH,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH + 6*8,
 		sega315_5124_device::LBORDER_START + sega315_5124_device::LBORDER_WIDTH + 26*8,

src/osd/modules/monitor/monitor_module.h

@@ -53,7 +53,7 @@ public:
 	float aspect() const { return m_aspect; }
 	float pixel_aspect() const { return m_aspect / (float(m_pos_size.width()) / float(m_pos_size.height())); }
 
-	void update_resolution(const int new_width, const int new_height) const { m_pos_size.resize(new_width, new_height); }
+	void update_resolution(const int new_width, const int new_height) { m_pos_size = m_pos_size.resize(new_width, new_height); }
 	void set_aspect(const float a) { m_aspect = a; }
 	bool is_primary() const { return m_is_primary; }