mingw: use Unicode functions explicitly

Many Win32 API functions actually exist in two variants: one with
the `A` suffix that takes ANSI parameters (`char *` or `const char *`)
and one with the `W` suffix that takes Unicode parameters (`wchar_t *`
or `const wchar_t *`).

The ANSI variant assumes that the strings are encoded according to
whatever is the current locale. This is not what Git wants to use on
Windows: we assume that `char *` variables point to strings encoded in
UTF-8.

There is a pseudo UTF-8 locale on Windows, but it does not work
as one might expect. In addition, if we overrode the user's locale, that
would modify the behavior of programs spawned by Git (such as editors,
difftools, etc), therefore we cannot use that pseudo locale.

Further, it is actually highly encouraged to use the Unicode versions
instead of the ANSI versions, so let's do precisely that.

Note: when calling the Win32 API functions _without_ any suffix, it
depends whether the `UNICODE` constant is defined before the relevant
headers are #include'd. Without that constant, the ANSI variants are
used. Let's be explicit and avoid that ambiguity.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/compat/mingw.c b/compat/mingw.c
index 8526876262aac6ce13f3c4ee4dcb9b17547e0aed..b8a62bf9147092e6c689fecf3170d03316b4dc06 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1407,7 +1407,7 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaen
        do_unset_environment_variables();
 
        /* Determine whether or not we are associated to a console */
-       cons = CreateFile("CONOUT$", GENERIC_WRITE,
+       cons = CreateFileW(L"CONOUT$", GENERIC_WRITE,
                        FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
                        FILE_ATTRIBUTE_NORMAL, NULL);
        if (cons == INVALID_HANDLE_VALUE) {

diff --git a/compat/poll/poll.c b/compat/poll/poll.c
index 4459408c7d0ba762b1dd4184a4c970778ba097a5..8f24b802521e982bd9be6502854689bcd84906f4 100644 (file)
--- a/compat/poll/poll.c
+++ b/compat/poll/poll.c
@@ -150,7 +150,7 @@ win32_compute_revents (HANDLE h, int *p_sought)
       if (!once_only)
        {
          NtQueryInformationFile = (PNtQueryInformationFile)
-           GetProcAddress (GetModuleHandle ("ntdll.dll"),
+           GetProcAddress (GetModuleHandleW (L"ntdll.dll"),
                            "NtQueryInformationFile");
          once_only = TRUE;
        }

diff --git a/compat/winansi.c b/compat/winansi.c
index f4f08237f9ed513e0dd3b3bfd9494f19944e3239..cd947e048e2c149240d636cc372b9f6de83700f9 100644 (file)
--- a/compat/winansi.c
+++ b/compat/winansi.c
@@ -599,7 +599,7 @@ int winansi_isatty(int fd)
 void winansi_init(void)
 {
        int con1, con2;
-       char name[32];
+       wchar_t name[32];
 
        /* check if either stdout or stderr is a console output screen buffer */
        con1 = is_console(1);
@@ -619,13 +619,15 @@ void winansi_init(void)
        }
 
        /* create a named pipe to communicate with the console thread */
-       xsnprintf(name, sizeof(name), "\\\\.\\pipe\\winansi%lu", GetCurrentProcessId());
-       hwrite = CreateNamedPipe(name, PIPE_ACCESS_OUTBOUND,
+       if (swprintf(name, ARRAY_SIZE(name) - 1, L"\\\\.\\pipe\\winansi%lu",
+                    GetCurrentProcessId()) < 0)
+               die("Could not initialize winansi pipe name");
+       hwrite = CreateNamedPipeW(name, PIPE_ACCESS_OUTBOUND,
                PIPE_TYPE_BYTE | PIPE_WAIT, 1, BUFFER_SIZE, 0, 0, NULL);
        if (hwrite == INVALID_HANDLE_VALUE)
                die_lasterr("CreateNamedPipe failed");
 
-       hread = CreateFile(name, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
+       hread = CreateFileW(name, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
        if (hread == INVALID_HANDLE_VALUE)
                die_lasterr("CreateFile for named pipe failed");