win32.c: rb_w32_reparse

* win32/win32.c (rb_w32_reparse): read reparse point in a dynamic
  buffer.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 40 insertions, 0 deletions

diff --git a/win32/file.h b/win32/file.h
new file mode 100644
index 0000000000..95a792a63f
--- /dev/null
+++ b/win32/file.h
@@ -0,0 +1,40 @@
+#ifndef RUBY_WIN32_FILE_H
+#define RUBY_WIN32_FILE_H
+
+#define MAX_REPARSE_PATH_LEN 4092
+
+enum {
+    MINIMUM_REPARSE_BUFFER_PATH_LEN = 4
+};
+/* License: Ruby's */
+typedef struct {
+    ULONG  ReparseTag;
+    USHORT ReparseDataLength;
+    USHORT Reserved;
+    union {
+	struct {
+	    USHORT SubstituteNameOffset;
+	    USHORT SubstituteNameLength;
+	    USHORT PrintNameOffset;
+	    USHORT PrintNameLength;
+	    ULONG  Flags;
+	    WCHAR  PathBuffer[4];
+	} SymbolicLinkReparseBuffer;
+	struct {
+	    USHORT SubstituteNameOffset;
+	    USHORT SubstituteNameLength;
+	    USHORT PrintNameOffset;
+	    USHORT PrintNameLength;
+	    WCHAR  PathBuffer[4];
+	} MountPointReparseBuffer;
+    };
+} rb_w32_reparse_buffer_t;
+
+#define rb_w32_reparse_buffer_size(n) \
+    (sizeof(rb_w32_reparse_buffer_t) + \
+     sizeof(WCHAR)*((n)-MINIMUM_REPARSE_BUFFER_PATH_LEN))
+
+int rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
+			      size_t bufsize, WCHAR **result, DWORD *len);
+
+#endif	/* RUBY_WIN32_FILE_H */