Fixed stack memory corruption due to strcat() function (#21)

* Fixed memory corruption due to strcat() function

- The problem with memory stack corruption occurred in the 'fetch_saveimagepath()' function when starting the emulator.
Because the memory allocated on the stack `TCHAR path[MAX_DPATH]` in function `DISK_get_default_saveimagepath` does not have a end of line marker ('/0').
That's why further call of the strcat() function which first searches for a zero byte and then adds another string to it resulted in stack corruption in this place and application crash as a consequence.
- In other similar functions, the same scenario is possible.

* Update dummy.cpp

Compilation error, I forgot to specify the variable name

* Fixed memory corruption due to strcat() function

- The problem with memory stack corruption occurred in the 'fetch_saveimagepath()' function when starting the emulator.
Because the memory allocated on the stack `TCHAR path[MAX_DPATH]` in function `DISK_get_default_saveimagepath` does not have a end of line marker ('/0').
That's why further call of the strcat() function which first searches for a zero byte and then adds another string to it resulted in stack corruption in this place and application crash as a consequence.
- In other similar functions, the same scenario is possible.

* Fix crash if host processor doesn't support 'movbe' SSE3 extension

- My Intel processor 2011 does not support SSE3 extensions, in particular 'movbe' instruction. As a result, the emulator crashes with the error 'illegal instruction'
Therefore, I would recommend leaving the original #ifdef HAVE_MOVBE

* Refactor to pass .clangformat test

src/dummy.cpp

@@ -777,23 +777,28 @@ void fastlane_add_scsi_unit(int, uaedev_config_info*, romconfig*) {
     UNIMPLEMENTED();
 }
 
-void fetch_inputfilepath(char*, int) {
+void fetch_inputfilepath(char* out, int) {
+    *out = 0;
     UNIMPLEMENTED();
 }
 
-void fetch_ripperpath(char*, int) {
+void fetch_ripperpath(char* out, int) {
+    *out = 0;
     UNIMPLEMENTED();
 }
 
-void fetch_rompath(char*, int) {
+void fetch_rompath(char* out, int) {
+    *out = 0;
     UNIMPLEMENTED();
 }
 
-void fetch_saveimagepath(char*, int, int) {
+void fetch_saveimagepath(char* out, int, int) {
+    *out = 0;
     TRACE();
 }
 
-void fetch_videopath(char*, int) {
+void fetch_videopath(char* out, int) {
+    *out = 0;
     UNIMPLEMENTED();
 }
 

src/machdep/maccess.h

@@ -24,6 +24,7 @@ STATIC_INLINE void do_put_mem_byte(uae_u8* a, uae_u8 v) {
 
 #ifdef _WIN32
 
+#ifdef HAVE_MOVBE
 #include <immintrin.h>
 
 STATIC_INLINE uae_u64 do_get_mem_quad(uae_u64* a) {
@@ -49,6 +50,33 @@ STATIC_INLINE void do_put_mem_long(uae_u32* a, uae_u32 v) {
 STATIC_INLINE void do_put_mem_word(uae_u16* a, uae_u16 v) {
     _store_be_u16(a, v);
 }
+#else /* HAVE_MOVBE */
+
+STATIC_INLINE uae_u64 do_get_mem_quad(uae_u64* a) {
+    return _byteswap_uint64(*a);
+}
+
+STATIC_INLINE uae_u32 do_get_mem_long(uae_u32* a) {
+    return _byteswap_ulong(*a);
+}
+
+STATIC_INLINE uae_u16 do_get_mem_word(uae_u16* a) {
+    return _byteswap_ushort(*a);
+}
+
+STATIC_INLINE void do_put_mem_quad(uae_u64* a, uae_u64 v) {
+    *a = _byteswap_uint64(v);
+}
+
+STATIC_INLINE void do_put_mem_long(uae_u32* a, uae_u32 v) {
+    *a = _byteswap_ulong(v);
+}
+
+STATIC_INLINE void do_put_mem_word(uae_u16* a, uae_u16 v) {
+    *a = _byteswap_ushort(v);
+}
+
+#endif /* HAVE_MOVBE */
 
 STATIC_INLINE uae_u64 do_byteswap_64(uae_u64 v) {
     return _byteswap_uint64(v);