Add typedefs for win32 utf-8 and utf-16 buffers

...and normalize the signatures of the two conversion functions.

10 files changed, 62 insertions, 58 deletions

diff --git a/src/fileops.c b/src/fileops.c
index 36fcc73df..5e86d1a91 100644
--- a/src/fileops.c
+++ b/src/fileops.c
@@ -58,9 +58,9 @@ int git_futils_creat_locked(const char *path, const mode_t mode)
 	int fd;
 
 #ifdef GIT_WIN32
-	wchar_t buf[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 buf;
 
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git__utf8_to_16(buf, path);
 	fd = _wopen(buf, O_WRONLY | O_CREAT | O_TRUNC |
 		O_EXCL | O_BINARY | O_CLOEXEC, mode);
 #else
diff --git a/src/path.c b/src/path.c
index ca0cc8c7c..da7bd90a0 100644
--- a/src/path.c
+++ b/src/path.c
@@ -486,14 +486,14 @@ bool git_path_is_empty_dir(const char *path)
 {
 	git_buf pathbuf = GIT_BUF_INIT;
 	HANDLE hFind = INVALID_HANDLE_VALUE;
-	wchar_t wbuf[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 wbuf;
 	WIN32_FIND_DATAW ffd;
 	bool retval = true;
 
 	if (!git_path_isdir(path)) return false;
 
 	git_buf_printf(&pathbuf, "%s\\*", path);
-	git__utf8_to_16(wbuf, GIT_WIN_PATH_UTF16, git_buf_cstr(&pathbuf));
+	git__utf8_to_16(wbuf, git_buf_cstr(&pathbuf));
 
 	hFind = FindFirstFileW(wbuf, &ffd);
 	if (INVALID_HANDLE_VALUE == hFind) {
diff --git a/src/transports/winhttp.c b/src/transports/winhttp.c
index 6064f90d8..fbf9b2f48 100644
--- a/src/transports/winhttp.c
+++ b/src/transports/winhttp.c
@@ -264,7 +264,7 @@ static int winhttp_stream_connect(winhttp_stream *s)
 		if (git_buf_printf(&buf, "Content-Type: application/x-git-%s-request", s->service) < 0)
 			goto on_error;
 
-		git__utf8_to_16(ct, MAX_CONTENT_TYPE_LEN, git_buf_cstr(&buf));
+		git__utf8_to_16(ct, git_buf_cstr(&buf));
 
 		if (!WinHttpAddRequestHeaders(s->request, ct, (ULONG) -1L, WINHTTP_ADDREQ_FLAG_ADD)) {
 			giterr_set(GITERR_OS, "Failed to add a header to the request");
@@ -593,7 +593,7 @@ replay:
 		else
 			snprintf(expected_content_type_8, MAX_CONTENT_TYPE_LEN, "application/x-git-%s-advertisement", s->service);
 
-		git__utf8_to_16(expected_content_type, MAX_CONTENT_TYPE_LEN, expected_content_type_8);
+		git__utf8_to_16(expected_content_type, expected_content_type_8);
 		content_type_length = sizeof(content_type);
 
 		if (!WinHttpQueryHeaders(s->request,
@@ -893,7 +893,7 @@ static int winhttp_connect(
 	const char *url)
 {
 	wchar_t *ua = L"git/1.0 (libgit2 " WIDEN(LIBGIT2_VERSION) L")";
-	wchar_t host[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 host;
 	int32_t port;
 	const char *default_port = "80";
 	int ret;
@@ -920,7 +920,7 @@ static int winhttp_connect(
 		return -1;
 
 	/* Prepare host */
-	git__utf8_to_16(host, GIT_WIN_PATH_UTF16, t->host);
+	git__utf8_to_16(host, t->host);
 
 	/* Establish session */
 	t->session = WinHttpOpen(
diff --git a/src/win32/dir.c b/src/win32/dir.c
index b18c603f7..a638fce96 100644
--- a/src/win32/dir.c
+++ b/src/win32/dir.c
@@ -26,7 +26,7 @@ static int init_filter(char *filter, size_t n, const char *dir)
 git__DIR *git__opendir(const char *dir)
 {
 	char filter[GIT_WIN_PATH_UTF8];
-	wchar_t filter_w[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 filter_w;
 	git__DIR *new = NULL;
 
 	if (!dir || !init_filter(filter, sizeof(filter), dir))
@@ -40,7 +40,7 @@ git__DIR *git__opendir(const char *dir)
 	if (!new->dir)
 		goto fail;
 
-	git__utf8_to_16(filter_w, GIT_WIN_PATH_UTF16, filter);
+	git__utf8_to_16(filter_w, filter);
 	new->h = FindFirstFileW(filter_w, &new->f);
 
 	if (new->h == INVALID_HANDLE_VALUE) {
@@ -102,7 +102,7 @@ struct git__dirent *git__readdir(git__DIR *d)
 void git__rewinddir(git__DIR *d)
 {
 	char filter[GIT_WIN_PATH_UTF8];
-	wchar_t filter_w[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 filter_w;
 
 	if (!d)
 		return;
@@ -116,7 +116,7 @@ void git__rewinddir(git__DIR *d)
 	if (!init_filter(filter, sizeof(filter), d->dir))
 		return;
 
-	git__utf8_to_16(filter_w, GIT_WIN_PATH_UTF16, filter);
+	git__utf8_to_16(filter_w, filter);
 	d->h = FindFirstFileW(filter_w, &d->f);
 
 	if (d->h == INVALID_HANDLE_VALUE)
diff --git a/src/win32/findfile.c b/src/win32/findfile.c
index 9d9051bff..248173563 100644
--- a/src/win32/findfile.c
+++ b/src/win32/findfile.c
@@ -53,7 +53,7 @@ int git_win32__find_file(
 	if (*filename == '/' || *filename == '\\')
 		filename++;
 
-	git__utf8_to_16(file_utf16 + root->len - 1, alloc_len, filename);
+	git__utf8_to_16(file_utf16 + root->len - 1, filename);
 
 	/* check access */
 	if (_waccess(file_utf16, F_OK) < 0) {
diff --git a/src/win32/posix.h b/src/win32/posix.h
index 753f35a2d..259ad572c 100644
--- a/src/win32/posix.h
+++ b/src/win32/posix.h
@@ -20,9 +20,9 @@ GIT_INLINE(int) p_link(const char *old, const char *new)
 
 GIT_INLINE(int) p_mkdir(const char *path, mode_t mode)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 buf;
 	GIT_UNUSED(mode);
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git__utf8_to_16(buf, path);
 	return _wmkdir(buf);
 }
 
diff --git a/src/win32/posix_w32.c b/src/win32/posix_w32.c
index a96741d1c..4c696d0cd 100644
--- a/src/win32/posix_w32.c
+++ b/src/win32/posix_w32.c
@@ -16,8 +16,8 @@
 
 int p_unlink(const char *path)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	_wchmod(buf, 0666);
 	return _wunlink(buf);
 }
@@ -59,10 +59,11 @@ static int do_lstat(
 	const char *file_name, struct stat *buf, int posix_enotdir)
 {
 	WIN32_FILE_ATTRIBUTE_DATA fdata;
-	wchar_t fbuf[GIT_WIN_PATH_UTF16], lastch;
+	git_win_str_utf16 fbuf;
+	wchar_t lastch;
 	int flen;
 
-	flen = git__utf8_to_16(fbuf, GIT_WIN_PATH_UTF16, file_name);
+	flen = git__utf8_to_16(fbuf, file_name);
 
 	/* truncate trailing slashes */
 	for (; flen > 0; --flen) {
@@ -165,7 +166,7 @@ int p_readlink(const char *link, char *target, size_t target_len)
 	static fpath_func pGetFinalPath = NULL;
 	HANDLE hFile;
 	DWORD dwRet;
-	wchar_t link_w[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 link_w;
 	wchar_t* target_w;
 	int error = 0;
 
@@ -188,7 +189,7 @@ int p_readlink(const char *link, char *target, size_t target_len)
 		}
 	}
 
-	git__utf8_to_16(link_w, GIT_WIN_PATH_UTF16, link);
+	git__utf8_to_16(link_w, link);
 
 	hFile = CreateFileW(link_w,			// file to open
 			GENERIC_READ,			// open for reading
@@ -254,10 +255,10 @@ int p_symlink(const char *old, const char *new)
 
 int p_open(const char *path, int flags, ...)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 buf;
 	mode_t mode = 0;
 
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git__utf8_to_16(buf, path);
 
 	if (flags & O_CREAT) {
 		va_list arg_list;
@@ -272,8 +273,8 @@ int p_open(const char *path, int flags, ...)
 
 int p_creat(const char *path, mode_t mode)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	return _wopen(buf, _O_WRONLY | _O_CREAT | _O_TRUNC | _O_BINARY, mode);
 }
 
@@ -315,23 +316,23 @@ int p_stat(const char* path, struct stat* buf)
 
 int p_chdir(const char* path)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	return _wchdir(buf);
 }
 
 int p_chmod(const char* path, mode_t mode)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	return _wchmod(buf, mode);
 }
 
 int p_rmdir(const char* path)
 {
 	int error;
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 
 	error = _wrmdir(buf);
 
@@ -347,18 +348,18 @@ int p_rmdir(const char* path)
 
 int p_hide_directory__w32(const char *path)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	return (SetFileAttributesW(buf, FILE_ATTRIBUTE_HIDDEN) != 0) ? 0 : -1;
 }
 
 char *p_realpath(const char *orig_path, char *buffer)
 {
 	int ret;
-	wchar_t orig_path_w[GIT_WIN_PATH_UTF16];
-	wchar_t buffer_w[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 orig_path_w;
+	git_win_str_utf16 buffer_w;
 
-	git__utf8_to_16(orig_path_w, GIT_WIN_PATH_UTF16, orig_path);
+	git__utf8_to_16(orig_path_w, orig_path);
 
 	/* Implicitly use GetCurrentDirectory which can be a threading issue */
 	ret = GetFullPathNameW(orig_path_w, GIT_WIN_PATH_UTF16, buffer_w, NULL);
@@ -448,18 +449,18 @@ int p_setenv(const char* name, const char* value, int overwrite)
 
 int p_access(const char* path, mode_t mode)
 {
-	wchar_t buf[GIT_WIN_PATH_UTF16];
-	git__utf8_to_16(buf, GIT_WIN_PATH_UTF16, path);
+	git_win_str_utf16 buf;
+	git__utf8_to_16(buf, path);
 	return _waccess(buf, mode);
 }
 
 int p_rename(const char *from, const char *to)
 {
-	wchar_t wfrom[GIT_WIN_PATH_UTF16];
-	wchar_t wto[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 wfrom;
+	git_win_str_utf16 wto;
 
-	git__utf8_to_16(wfrom, GIT_WIN_PATH_UTF16, from);
-	git__utf8_to_16(wto, GIT_WIN_PATH_UTF16, to);
+	git__utf8_to_16(wfrom, from);
+	git__utf8_to_16(wto, to);
 	return MoveFileExW(wfrom, wto, MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED) ? 0 : -1;
 }
 
diff --git a/src/win32/utf-conv.c b/src/win32/utf-conv.c
index 78d277494..9c9686147 100644
--- a/src/win32/utf-conv.c
+++ b/src/win32/utf-conv.c
@@ -70,12 +70,12 @@ void git__utf8_to_16(wchar_t *dest, size_t length, const char *src)
 }
 #endif
 
-int git__utf8_to_16(wchar_t *dest, size_t length, const char *src)
+int git__utf8_to_16(git_win_str_utf16 dest, const git_win_str_utf8 src)
 {
-	return MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, (int)length);
+	return MultiByteToWideChar(CP_UTF8, 0, src, -1, dest, GIT_WIN_PATH_UTF16);
 }
 
-int git__utf16_to_8(char *out, const wchar_t *input)
+int git__utf16_to_8(git_win_str_utf8 dest, const git_win_str_utf16 src)
 {
-	return WideCharToMultiByte(CP_UTF8, 0, input, -1, out, GIT_WIN_PATH_UTF8, NULL, NULL);
+	return WideCharToMultiByte(CP_UTF8, 0, src, -1, dest, GIT_WIN_PATH_UTF8, NULL, NULL);
 }
diff --git a/src/win32/utf-conv.h b/src/win32/utf-conv.h
index 9922e2969..d0b6fc825 100644
--- a/src/win32/utf-conv.h
+++ b/src/win32/utf-conv.h
@@ -13,8 +13,11 @@
 #define GIT_WIN_PATH_UTF16 (260 + 1)
 #define GIT_WIN_PATH_UTF8  (260 * 4 + 1)
 
-int git__utf8_to_16(wchar_t *dest, size_t length, const char *src);
-int git__utf16_to_8(char *dest, const wchar_t *src);
+typedef wchar_t git_win_str_utf16[GIT_WIN_PATH_UTF16];
+typedef char git_win_str_utf8[GIT_WIN_PATH_UTF8];
+
+int git__utf8_to_16(git_win_str_utf16 dest, const git_win_str_utf8 src);
+int git__utf16_to_8(git_win_str_utf8 dest, const git_win_str_utf16 src);
 
 #endif
 
diff --git a/tests-clar/clar_libgit2.c b/tests-clar/clar_libgit2.c
index 34d54cd94..869acd613 100644
--- a/tests-clar/clar_libgit2.c
+++ b/tests-clar/clar_libgit2.c
@@ -56,12 +56,12 @@ void cl_git_rewritefile(const char *filename, const char *new_content)
 
 char *cl_getenv(const char *name)
 {
-	wchar_t name_utf16[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 name_utf16;
 	DWORD alloc_len;
 	wchar_t *value_utf16;
 	char *value_utf8;
 
-	git__utf8_to_16(name_utf16, GIT_WIN_PATH_UTF16, name);
+	git__utf8_to_16(name_utf16, name);
 	alloc_len = GetEnvironmentVariableW(name_utf16, NULL, 0);
 	if (alloc_len <= 0)
 		return NULL;
@@ -81,13 +81,13 @@ char *cl_getenv(const char *name)
 
 int cl_setenv(const char *name, const char *value)
 {
-	wchar_t name_utf16[GIT_WIN_PATH_UTF16];
-	wchar_t value_utf16[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 name_utf16;
+	git_win_str_utf16 value_utf16;
 
-	git__utf8_to_16(name_utf16, GIT_WIN_PATH_UTF16, name);
+	git__utf8_to_16(name_utf16, name);
 
 	if (value) {
-		git__utf8_to_16(value_utf16, GIT_WIN_PATH_UTF16, value);
+		git__utf8_to_16(value_utf16, value);
 		cl_assert(SetEnvironmentVariableW(name_utf16, value_utf16));
 	} else {
 		/* Windows XP returns 0 (failed) when passing NULL for lpValue when
@@ -107,12 +107,12 @@ int cl_setenv(const char *name, const char *value)
  * the source is a directory, a child of the source). */
 int cl_rename(const char *source, const char *dest)
 {
-	wchar_t source_utf16[GIT_WIN_PATH_UTF16];
-	wchar_t dest_utf16[GIT_WIN_PATH_UTF16];
+	git_win_str_utf16 source_utf16;
+	git_win_str_utf16 dest_utf16;
 	unsigned retries = 1;
 
-	git__utf8_to_16(source_utf16, GIT_WIN_PATH_UTF16, source);
-	git__utf8_to_16(dest_utf16, GIT_WIN_PATH_UTF16, dest);
+	git__utf8_to_16(source_utf16, source);
+	git__utf8_to_16(dest_utf16, dest);
 
 	while (!MoveFileW(source_utf16, dest_utf16)) {
 		/* Only retry if the error is ERROR_ACCESS_DENIED;