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win32.c: volume_prefix_len

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* win32/win32.c (rb_w32_read_reparse_point): name the prefix
  length to be dropped.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53706 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-02-01 12:08:08 +00:00
parent 19162d268b
commit 94cfa2893c
1 changed files with 3 additions and 3 deletions
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6
win32/win32.c
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@ -4843,13 +4843,13 @@ rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
}
else { /* IO_REPARSE_TAG_MOUNT_POINT */
static const WCHAR *volume = L"Volume{";
/* +4/-4 means to drop "\??\" */
enum {volume_prefix_len = rb_strlen_lit("\\??\\")};
name = ((char *)rp->MountPointReparseBuffer.PathBuffer +
rp->MountPointReparseBuffer.SubstituteNameOffset +
4 * sizeof(WCHAR));
volume_prefix_len * sizeof(WCHAR));
ret = rp->MountPointReparseBuffer.SubstituteNameLength;
*len = ret / sizeof(WCHAR);
ret -= 4 * sizeof(WCHAR);
ret -= volume_prefix_len * sizeof(WCHAR);
if (ret > sizeof(volume) - 1 * sizeof(WCHAR) &&
memcmp(name, volume, sizeof(volume) - 1 * sizeof(WCHAR)) == 0)
return -1;