diff options
Diffstat (limited to 'libusb/os/windows_common.h')
| -rw-r--r-- | libusb/os/windows_common.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/libusb/os/windows_common.h b/libusb/os/windows_common.h index 069b147..93ea23e 100644 --- a/libusb/os/windows_common.h +++ b/libusb/os/windows_common.h @@ -30,6 +30,23 @@ #include <stdbool.h> +/* + * Workaround for the mess that exists with the DWORD and ULONG types. + * Visual Studio unconditionally defines these types as 'unsigned long' + * and a long is always 32-bits, even on 64-bit builds. GCC on the other + * hand varies the width of a long, matching it to the build. To make + * matters worse, the platform headers for these GCC builds define a + * DWORD/ULONG to be 'unsigned long' on 32-bit builds and 'unsigned int' + * on 64-bit builds. This creates a great deal of warnings for compilers + * that support printf format checking since it will never actually be + * an unsigned long. + */ +#if defined(_MSC_VER) +#define ULONG_CAST(x) (x) +#else +#define ULONG_CAST(x) ((unsigned long)(x)) +#endif + #if defined(__CYGWIN__ ) #define _stricmp strcasecmp #define _strdup strdup |