Add windows implementation for chdir in libcompat

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

2 files changed, 57 insertions, 1 deletions

diff --git a/lib/compat/Makemodule.am b/lib/compat/Makemodule.am
index 7ba3444..fb37b46 100644
--- a/lib/compat/Makemodule.am
+++ b/lib/compat/Makemodule.am
@@ -1,5 +1,5 @@
 libcompat_a_SOURCES = lib/compat/getline.c lib/compat/getsubopt.c
 libcompat_a_SOURCES += lib/compat/strndup.c lib/compat/mockups.c
-libcompat_a_SOURCES += include/compat.h
+libcompat_a_SOURCES += lib/compat/chdir.c include/compat.h
 
 noinst_LIBRARIES += libcompat.a
diff --git a/lib/compat/chdir.c b/lib/compat/chdir.c
new file mode 100644
index 0000000..b1b2d0c
--- /dev/null
+++ b/lib/compat/chdir.c
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * chdir.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+#include "compat.h"
+
+#include "util/util.h"
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#include <stdlib.h>
+
+int chdir(const char *path)
+{
+	WCHAR *wpath, *ptr;
+	DWORD length;
+	int ret;
+
+	length = MultiByteToWideChar(CP_UTF8, 0, path, -1, NULL, 0);
+	if (length <= 0) {
+		fprintf(stderr, "Converting '%s' to UTF-16: %ld\n",
+			path, GetLastError());
+		return -1;
+	}
+
+	wpath = alloc_array(sizeof(wpath[0]), length + 1);
+	if (wpath == NULL) {
+		fprintf(stderr, "Converting '%s' to UTF-16: out of memory\n",
+			path);
+		return -1;
+	}
+
+	MultiByteToWideChar(CP_UTF8, 0, path, -1, wpath, length + 1);
+	wpath[length] = '\0';
+
+	for (ptr = wpath; *ptr != '\0'; ++ptr) {
+		if (*ptr == '/')
+			*ptr = '\\';
+	}
+
+	if (!SetCurrentDirectoryW(wpath)) {
+		fprintf(stderr, "Switching to directory '%s': %ld\n",
+			path, GetLastError());
+		ret = -1;
+	} else {
+		ret = 0;
+	}
+
+	free(wpath);
+	return ret;
+}
+#endif