win32: drop xp support in WideCharToMultiByte

src/win32/utf-conv.c

@@ -8,20 +8,6 @@
 #include "common.h"
 #include "utf-conv.h"
 
-GIT_INLINE(DWORD) get_wc_flags(void)
-{
-	static char inited = 0;
-	static DWORD flags;
-
-	/* Invalid code point check supported on Vista+ only */
-	if (!inited) {
-		flags = git_has_win32_version(6, 0, 0) ? WC_ERR_INVALID_CHARS : 0;
-		inited = 1;
-	}
-
-	return flags;
-}
-
 GIT_INLINE(void) git__set_errno(void)
 {
 	if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
@@ -66,7 +52,7 @@ int git__utf16_to_8(char *dest, size_t dest_size, const wchar_t *src)
 	/* Length of -1 indicates NULL termination of the input string. Subtract 1 from the result to
 	 * turn 0 into -1 (an error code) and to not count the NULL terminator as part of the string's
 	 * length. WideCharToMultiByte never returns int's minvalue, so underflow is not possible */
-	if ((len = WideCharToMultiByte(CP_UTF8, get_wc_flags(), src, -1, dest, (int)dest_size, NULL, NULL) - 1) < 0)
+	if ((len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, src, -1, dest, (int)dest_size, NULL, NULL) - 1) < 0)
 		git__set_errno();
 
 	return len;
@@ -127,12 +113,11 @@ int git__utf8_to_16_alloc(wchar_t **dest, const char *src)
 int git__utf16_to_8_alloc(char **dest, const wchar_t *src)
 {
 	int utf8_size;
-	DWORD dwFlags = get_wc_flags();
 
 	*dest = NULL;
 
 	/* Length of -1 indicates NULL termination of the input string */
-	utf8_size = WideCharToMultiByte(CP_UTF8, dwFlags, src, -1, NULL, 0, NULL, NULL);
+	utf8_size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, src, -1, NULL, 0, NULL, NULL);
 
 	if (!utf8_size) {
 		git__set_errno();
@@ -146,7 +131,7 @@ int git__utf16_to_8_alloc(char **dest, const wchar_t *src)
 		return -1;
 	}
 
-	utf8_size = WideCharToMultiByte(CP_UTF8, dwFlags, src, -1, *dest, utf8_size, NULL, NULL);
+	utf8_size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, src, -1, *dest, utf8_size, NULL, NULL);
 
 	if (!utf8_size) {
 		git__set_errno();