rb_w32_ugetcwd: UTF-8 version getcwd

* dir.c (rb_dir_getwd): convert from UTF-8.

* win32/win32.c (w32_getcwd): codepage aware getcwd using
  GetCurrentDirectoryW.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58745 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 35 insertions, 17 deletions

diff --git a/win32/win32.c b/win32/win32.c
index 8b18821f5f..0296f2d3c1 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -4655,43 +4655,61 @@ clock_getres(clockid_t clock_id, struct timespec *sp)
 }
 
 /* License: Ruby's */
-char *
-rb_w32_getcwd(char *buffer, int size)
+static char *
+w32_getcwd(char *buffer, int size, UINT cp)
 {
-    char *p = buffer;
-    int len;
+    WCHAR *p;
+    int wlen, len;
 
-    len = GetCurrentDirectory(0, NULL);
+    len = GetCurrentDirectoryW(0, NULL);
     if (!len) {
 	errno = map_errno(GetLastError());
 	return NULL;
     }
 
-    if (p) {
+    if (buffer && size < len) {
+	errno = ERANGE;
+	return NULL;
+    }
+
+    p = ALLOCA_N(WCHAR, len);
+    if (!GetCurrentDirectoryW(len, p)) {
+	errno = map_errno(GetLastError());
+        return NULL;
+    }
+
+    wlen = translate_wchar(p, L'\\', L'/') - p + 1;
+    len = WideCharToMultiByte(cp, 0, p, wlen, NULL, 0, NULL, NULL);
+    if (buffer) {
 	if (size < len) {
 	    errno = ERANGE;
 	    return NULL;
 	}
     }
     else {
-	p = malloc(len);
-	size = len;
-	if (!p) {
+	buffer = malloc(len);
+	if (!buffer) {
 	    errno = ENOMEM;
 	    return NULL;
 	}
     }
+    WideCharToMultiByte(cp, 0, p, wlen, buffer, len, NULL, NULL);
 
-    if (!GetCurrentDirectory(size, p)) {
-	errno = map_errno(GetLastError());
-	if (!buffer)
-	    free(p);
-        return NULL;
-    }
+    return buffer;
+}
 
-    translate_char(p, '\\', '/', filecp());
+/* License: Ruby's */
+char *
+rb_w32_getcwd(char *buffer, int size)
+{
+    return w32_getcwd(buffer, size, filecp());
+}
 
-    return p;
+/* License: Ruby's */
+char *
+rb_w32_ugetcwd(char *buffer, int size)
+{
+    return w32_getcwd(buffer, size, CP_UTF8);
 }
 
 /* License: Artistic or GPL */