updated for version 7.3.836v7.3.836

Problem:    Clipboard does not work on Win32 when compiled with Cygwin.
Solution:   Move the Win32 clipboard code to a separate file and use it when
            building with os_unix.c. (Frodak Baksik, Ken Takata)

1 files changed, 798 insertions, 0 deletions

diff --git a/src/winclip.c b/src/winclip.c
new file mode 100644
index 000000000..19cf182a0
--- /dev/null
+++ b/src/winclip.c
@@ -0,0 +1,798 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ * See README.txt for an overview of the Vim source code.
+ */
+
+/*
+ * winclip.c
+ *
+ * Routines common to both Win16 and Win32 for clipboard handling.
+ * Also used by Cygwin, using os_unix.c.
+ */
+
+#ifdef WIN16
+# ifdef __BORLANDC__
+#  pragma warn -par
+#  pragma warn -ucp
+#  pragma warn -use
+#  pragma warn -aus
+# endif
+#endif
+
+#include "vimio.h"
+#include "vim.h"
+
+/*
+ * Compile only the clipboard handling features when compiling for cygwin
+ * posix environment.
+ */
+#ifdef FEAT_CYGWIN_WIN32_CLIPBOARD
+# define WIN3264
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+# include "winclip.pro"
+#endif
+
+/*
+ * When generating prototypes for Win32 on Unix, these lines make the syntax
+ * errors disappear.  They do not need to be correct.
+ */
+#ifdef PROTO
+#define WINAPI
+#define WINBASEAPI
+typedef int DWORD;
+typedef int LPBOOL;
+typedef int LPCSTR;
+typedef int LPCWSTR;
+typedef int LPSTR;
+typedef int LPWSTR;
+typedef int UINT;
+#endif
+
+#if defined(FEAT_MBYTE) || defined(PROTO)
+/*
+ * Convert an UTF-8 string to UTF-16.
+ * "instr[inlen]" is the input.  "inlen" is in bytes.
+ * When "outstr" is NULL only return the number of UTF-16 words produced.
+ * Otherwise "outstr" must be a buffer of sufficient size.
+ * Returns the number of UTF-16 words produced.
+ */
+    int
+utf8_to_utf16(char_u *instr, int inlen, short_u *outstr, int *unconvlenp)
+{
+    int		outlen = 0;
+    char_u	*p = instr;
+    int		todo = inlen;
+    int		l;
+    int		ch;
+
+    while (todo > 0)
+    {
+	/* Only convert if we have a complete sequence. */
+	l = utf_ptr2len_len(p, todo);
+	if (l > todo)
+	{
+	    /* Return length of incomplete sequence. */
+	    if (unconvlenp != NULL)
+		*unconvlenp = todo;
+	    break;
+	}
+
+	ch = utf_ptr2char(p);
+	if (ch >= 0x10000)
+	{
+	    /* non-BMP character, encoding with surrogate pairs */
+	    ++outlen;
+	    if (outstr != NULL)
+	    {
+		*outstr++ = (0xD800 - (0x10000 >> 10)) + (ch >> 10);
+		*outstr++ = 0xDC00 | (ch & 0x3FF);
+	    }
+	}
+	else if (outstr != NULL)
+	    *outstr++ = ch;
+	++outlen;
+	p += l;
+	todo -= l;
+    }
+
+    return outlen;
+}
+
+/*
+ * Convert an UTF-16 string to UTF-8.
+ * The input is "instr[inlen]" with "inlen" in number of UTF-16 words.
+ * When "outstr" is NULL only return the required number of bytes.
+ * Otherwise "outstr" must be a buffer of sufficient size.
+ * Return the number of bytes produced.
+ */
+    int
+utf16_to_utf8(short_u *instr, int inlen, char_u *outstr)
+{
+    int		outlen = 0;
+    int		todo = inlen;
+    short_u	*p = instr;
+    int		l;
+    int		ch, ch2;
+
+    while (todo > 0)
+    {
+	ch = *p;
+	if (ch >= 0xD800 && ch <= 0xDBFF && todo > 1)
+	{
+	    /* surrogate pairs handling */
+	    ch2 = p[1];
+	    if (ch2 >= 0xDC00 && ch2 <= 0xDFFF)
+	    {
+		ch = ((ch - 0xD800) << 10) + (ch2 & 0x3FF) + 0x10000;
+		++p;
+		--todo;
+	    }
+	}
+	if (outstr != NULL)
+	{
+	    l = utf_char2bytes(ch, outstr);
+	    outstr += l;
+	}
+	else
+	    l = utf_char2len(ch);
+	++p;
+	outlen += l;
+	--todo;
+    }
+
+    return outlen;
+}
+
+/*
+ * Call MultiByteToWideChar() and allocate memory for the result.
+ * Returns the result in "*out[*outlen]" with an extra zero appended.
+ * "outlen" is in words.
+ */
+    void
+MultiByteToWideChar_alloc(UINT cp, DWORD flags,
+	LPCSTR in, int inlen,
+	LPWSTR *out, int *outlen)
+{
+    *outlen = MultiByteToWideChar(cp, flags, in, inlen, 0, 0);
+    /* Add one one word to avoid a zero-length alloc(). */
+    *out = (LPWSTR)alloc(sizeof(WCHAR) * (*outlen + 1));
+    if (*out != NULL)
+    {
+	MultiByteToWideChar(cp, flags, in, inlen, *out, *outlen);
+	(*out)[*outlen] = 0;
+    }
+}
+
+/*
+ * Call WideCharToMultiByte() and allocate memory for the result.
+ * Returns the result in "*out[*outlen]" with an extra NUL appended.
+ */
+    void
+WideCharToMultiByte_alloc(UINT cp, DWORD flags,
+	LPCWSTR in, int inlen,
+	LPSTR *out, int *outlen,
+	LPCSTR def, LPBOOL useddef)
+{
+    *outlen = WideCharToMultiByte(cp, flags, in, inlen, NULL, 0, def, useddef);
+    /* Add one one byte to avoid a zero-length alloc(). */
+    *out = alloc((unsigned)*outlen + 1);
+    if (*out != NULL)
+    {
+	WideCharToMultiByte(cp, flags, in, inlen, *out, *outlen, def, useddef);
+	(*out)[*outlen] = 0;
+    }
+}
+
+#endif /* FEAT_MBYTE */
+
+#ifdef FEAT_CLIPBOARD
+/*
+ * Clipboard stuff, for cutting and pasting text to other windows.
+ */
+
+    void
+win_clip_init(void)
+{
+    clip_init(TRUE);
+
+    /*
+     * Vim's own clipboard format recognises whether the text is char, line,
+     * or rectangular block.  Only useful for copying between two Vims.
+     * "VimClipboard" was used for previous versions, using the first
+     * character to specify MCHAR, MLINE or MBLOCK.
+     */
+    clip_star.format = RegisterClipboardFormat("VimClipboard2");
+    clip_star.format_raw = RegisterClipboardFormat("VimRawBytes");
+}
+
+/* Type used for the clipboard type of Vim's data. */
+typedef struct
+{
+    int type;		/* MCHAR, MBLOCK or MLINE */
+    int txtlen;		/* length of CF_TEXT in bytes */
+    int ucslen;		/* length of CF_UNICODETEXT in words */
+    int rawlen;		/* length of clip_star.format_raw, including encoding,
+			   excluding terminating NUL */
+} VimClipType_t;
+
+/*
+ * Make vim the owner of the current selection.  Return OK upon success.
+ */
+/*ARGSUSED*/
+    int
+clip_mch_own_selection(VimClipboard *cbd)
+{
+    /*
+     * Never actually own the clipboard.  If another application sets the
+     * clipboard, we don't want to think that we still own it.
+     */
+    return FAIL;
+}
+
+/*
+ * Make vim NOT the owner of the current selection.
+ */
+/*ARGSUSED*/
+    void
+clip_mch_lose_selection(VimClipboard *cbd)
+{
+    /* Nothing needs to be done here */
+}
+
+/*
+ * Copy "str[*size]" into allocated memory, changing CR-NL to NL.
+ * Return the allocated result and the size in "*size".
+ * Returns NULL when out of memory.
+ */
+    static char_u *
+crnl_to_nl(const char_u *str, int *size)
+{
+    int		pos = 0;
+    int		str_len = *size;
+    char_u	*ret;
+    char_u	*retp;
+
+    /* Avoid allocating zero bytes, it generates an error message. */
+    ret = lalloc((long_u)(str_len == 0 ? 1 : str_len), TRUE);
+    if (ret != NULL)
+    {
+	retp = ret;
+	for (pos = 0; pos < str_len; ++pos)
+	{
+	    if (str[pos] == '\r' && str[pos + 1] == '\n')
+	    {
+		++pos;
+		--(*size);
+	    }
+	    *retp++ = str[pos];
+	}
+    }
+
+    return ret;
+}
+
+/*
+ * Wait for another process to Close the Clipboard.
+ * Returns TRUE for success.
+ */
+    static int
+vim_open_clipboard(void)
+{
+    int delay = 10;
+
+    while (!OpenClipboard(NULL))
+    {
+	if (delay > 500)
+	    return FALSE;  /* waited too long, give up */
+	Sleep(delay);
+	delay *= 2;	/* wait for 10, 20, 40, 80, etc. msec */
+    }
+    return TRUE;
+}
+
+/*
+ * Get the current selection and put it in the clipboard register.
+ *
+ * NOTE: Must use GlobalLock/Unlock here to ensure Win32s compatibility.
+ * On NT/W95 the clipboard data is a fixed global memory object and
+ * so its handle = its pointer.
+ * On Win32s, however, co-operation with the Win16 system means that
+ * the clipboard data is moveable and its handle is not a pointer at all,
+ * so we can't just cast the return value of GetClipboardData to (char_u*).
+ * <VN>
+ */
+    void
+clip_mch_request_selection(VimClipboard *cbd)
+{
+    VimClipType_t	metadata = { -1, -1, -1, -1 };
+    HGLOBAL		hMem = NULL;
+    char_u		*str = NULL;
+#if defined(FEAT_MBYTE) && defined(WIN3264)
+    char_u		*to_free = NULL;
+#endif
+#ifdef FEAT_MBYTE
+    HGLOBAL		rawh = NULL;
+#endif
+    int			str_size = 0;
+    int			maxlen;
+    size_t		n;
+
+    /*
+     * Don't pass GetActiveWindow() as an argument to OpenClipboard() because
+     * then we can't paste back into the same window for some reason - webb.
+     */
+    if (!vim_open_clipboard())
+	return;
+
+    /* Check for vim's own clipboard format first.  This only gets the type of
+     * the data, still need to use CF_UNICODETEXT or CF_TEXT for the text. */
+    if (IsClipboardFormatAvailable(cbd->format))
+    {
+	VimClipType_t	*meta_p;
+	HGLOBAL		meta_h;
+
+	/* We have metadata on the clipboard; try to get it. */
+	if ((meta_h = GetClipboardData(cbd->format)) != NULL
+		&& (meta_p = (VimClipType_t *)GlobalLock(meta_h)) != NULL)
+	{
+	    /* The size of "VimClipType_t" changed, "rawlen" was added later.
+	     * Only copy what is available for backwards compatibility. */
+	    n = sizeof(VimClipType_t);
+	    if (GlobalSize(meta_h) < n)
+		n = GlobalSize(meta_h);
+	    memcpy(&metadata, meta_p, n);
+	    GlobalUnlock(meta_h);
+	}
+    }
+
+#ifdef FEAT_MBYTE
+    /* Check for Vim's raw clipboard format first.  This is used without
+     * conversion, but only if 'encoding' matches. */
+    if (IsClipboardFormatAvailable(cbd->format_raw)
+				      && metadata.rawlen > (int)STRLEN(p_enc))
+    {
+	/* We have raw data on the clipboard; try to get it. */
+	if ((rawh = GetClipboardData(cbd->format_raw)) != NULL)
+	{
+	    char_u	*rawp;
+
+	    rawp = (char_u *)GlobalLock(rawh);
+	    if (rawp != NULL && STRCMP(p_enc, rawp) == 0)
+	    {
+		n = STRLEN(p_enc) + 1;
+		str = rawp + n;
+		str_size = (int)(metadata.rawlen - n);
+	    }
+	    else
+	    {
+		GlobalUnlock(rawh);
+		rawh = NULL;
+	    }
+	}
+    }
+    if (str == NULL)
+    {
+#endif
+
+#if defined(FEAT_MBYTE) && defined(WIN3264)
+    /* Try to get the clipboard in Unicode if it's not an empty string. */
+    if (IsClipboardFormatAvailable(CF_UNICODETEXT) && metadata.ucslen != 0)
+    {
+	HGLOBAL hMemW;
+
+	if ((hMemW = GetClipboardData(CF_UNICODETEXT)) != NULL)
+	{
+	    WCHAR *hMemWstr = (WCHAR *)GlobalLock(hMemW);
+
+	    /* Use the length of our metadata if possible, but limit it to the
+	     * GlobalSize() for safety. */
+	    maxlen = (int)(GlobalSize(hMemW) / sizeof(WCHAR));
+	    if (metadata.ucslen >= 0)
+	    {
+		if (metadata.ucslen > maxlen)
+		    str_size = maxlen;
+		else
+		    str_size = metadata.ucslen;
+	    }
+	    else
+	    {
+		for (str_size = 0; str_size < maxlen; ++str_size)
+		    if (hMemWstr[str_size] == NUL)
+			break;
+	    }
+	    to_free = str = utf16_to_enc((short_u *)hMemWstr, &str_size);
+	    GlobalUnlock(hMemW);
+	}
+    }
+    else
+#endif
+    /* Get the clipboard in the Active codepage. */
+    if (IsClipboardFormatAvailable(CF_TEXT))
+    {
+	if ((hMem = GetClipboardData(CF_TEXT)) != NULL)
+	{
+	    str = (char_u *)GlobalLock(hMem);
+
+	    /* The length is either what our metadata says or the strlen().
+	     * But limit it to the GlobalSize() for safety. */
+	    maxlen = (int)GlobalSize(hMem);
+	    if (metadata.txtlen >= 0)
+	    {
+		if (metadata.txtlen > maxlen)
+		    str_size = maxlen;
+		else
+		    str_size = metadata.txtlen;
+	    }
+	    else
+	    {
+		for (str_size = 0; str_size < maxlen; ++str_size)
+		    if (str[str_size] == NUL)
+			break;
+	    }
+
+# if defined(FEAT_MBYTE) && defined(WIN3264)
+	    /* The text is in the active codepage.  Convert to 'encoding',
+	     * going through UTF-16. */
+	    acp_to_enc(str, str_size, &to_free, &maxlen);
+	    if (to_free != NULL)
+	    {
+		str_size = maxlen;
+		str = to_free;
+	    }
+# endif
+	}
+    }
+#ifdef FEAT_MBYTE
+    }
+#endif
+
+    if (str != NULL && *str != NUL)
+    {
+	char_u *temp_clipboard;
+
+	/* If the type is not known detect it. */
+	if (metadata.type == -1)
+	    metadata.type = MAUTO;
+
+	/* Translate <CR><NL> into <NL>. */
+	temp_clipboard = crnl_to_nl(str, &str_size);
+	if (temp_clipboard != NULL)
+	{
+	    clip_yank_selection(metadata.type, temp_clipboard, str_size, cbd);
+	    vim_free(temp_clipboard);
+	}
+    }
+
+    /* unlock the global object */
+    if (hMem != NULL)
+	GlobalUnlock(hMem);
+#ifdef FEAT_MBYTE
+    if (rawh != NULL)
+	GlobalUnlock(rawh);
+#endif
+    CloseClipboard();
+#if defined(FEAT_MBYTE) && defined(WIN3264)
+    vim_free(to_free);
+#endif
+}
+
+/*
+ * Send the current selection to the clipboard.
+ */
+    void
+clip_mch_set_selection(VimClipboard *cbd)
+{
+    char_u		*str = NULL;
+    VimClipType_t	metadata;
+    long_u		txtlen;
+    HGLOBAL		hMemRaw = NULL;
+    HGLOBAL		hMem = NULL;
+    HGLOBAL		hMemVim = NULL;
+# if defined(FEAT_MBYTE) && defined(WIN3264)
+    HGLOBAL		hMemW = NULL;
+# endif
+
+    /* If the '*' register isn't already filled in, fill it in now */
+    cbd->owned = TRUE;
+    clip_get_selection(cbd);
+    cbd->owned = FALSE;
+
+    /* Get the text to be put on the clipboard, with CR-LF. */
+    metadata.type = clip_convert_selection(&str, &txtlen, cbd);
+    if (metadata.type < 0)
+	return;
+    metadata.txtlen = (int)txtlen;
+    metadata.ucslen = 0;
+    metadata.rawlen = 0;
+
+#ifdef FEAT_MBYTE
+    /* Always set the raw bytes: 'encoding', NUL and the text.  This is used
+     * when copy/paste from/to Vim with the same 'encoding', so that illegal
+     * bytes can also be copied and no conversion is needed. */
+    {
+	LPSTR lpszMemRaw;
+
+	metadata.rawlen = (int)(txtlen + STRLEN(p_enc) + 1);
+	hMemRaw = (LPSTR)GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE,
+							 metadata.rawlen + 1);
+	lpszMemRaw = (LPSTR)GlobalLock(hMemRaw);
+	if (lpszMemRaw != NULL)
+	{
+	    STRCPY(lpszMemRaw, p_enc);
+	    memcpy(lpszMemRaw + STRLEN(p_enc) + 1, str, txtlen + 1);
+	    GlobalUnlock(hMemRaw);
+	}
+	else
+	    metadata.rawlen = 0;
+    }
+#endif
+
+# if defined(FEAT_MBYTE) && defined(WIN3264)
+    {
+	WCHAR		*out;
+	int		len = metadata.txtlen;
+
+	/* Convert the text to UTF-16. This is put on the clipboard as
+	 * CF_UNICODETEXT. */
+	out = (WCHAR *)enc_to_utf16(str, &len);
+	if (out != NULL)
+	{
+	    WCHAR *lpszMemW;
+
+	    /* Convert the text for CF_TEXT to Active codepage. Otherwise it's
+	     * p_enc, which has no relation to the Active codepage. */
+	    metadata.txtlen = WideCharToMultiByte(GetACP(), 0, out, len,
+							       NULL, 0, 0, 0);
+	    vim_free(str);
+	    str = (char_u *)alloc((unsigned)(metadata.txtlen == 0 ? 1
+							  : metadata.txtlen));
+	    if (str == NULL)
+	    {
+		vim_free(out);
+		return;		/* out of memory */
+	    }
+	    WideCharToMultiByte(GetACP(), 0, out, len,
+						  str, metadata.txtlen, 0, 0);
+
+	    /* Allocate memory for the UTF-16 text, add one NUL word to
+	     * terminate the string. */
+	    hMemW = (LPSTR)GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE,
+						   (len + 1) * sizeof(WCHAR));
+	    lpszMemW = (WCHAR *)GlobalLock(hMemW);
+	    if (lpszMemW != NULL)
+	    {
+		memcpy(lpszMemW, out, len * sizeof(WCHAR));
+		lpszMemW[len] = NUL;
+		GlobalUnlock(hMemW);
+	    }
+	    vim_free(out);
+	    metadata.ucslen = len;
+	}
+    }
+# endif
+
+    /* Allocate memory for the text, add one NUL byte to terminate the string.
+     */
+    hMem = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, metadata.txtlen + 1);
+    {
+	LPSTR lpszMem = (LPSTR)GlobalLock(hMem);
+
+	if (lpszMem)
+	{
+	    vim_strncpy(lpszMem, str, metadata.txtlen);
+	    GlobalUnlock(hMem);
+	}
+    }
+
+    /* Set up metadata: */
+    {
+	VimClipType_t *lpszMemVim = NULL;
+
+	hMemVim = GlobalAlloc(GMEM_MOVEABLE|GMEM_DDESHARE,
+						       sizeof(VimClipType_t));
+	lpszMemVim = (VimClipType_t *)GlobalLock(hMemVim);
+	memcpy(lpszMemVim, &metadata, sizeof(metadata));
+	GlobalUnlock(hMemVim);
+    }
+
+    /*
+     * Open the clipboard, clear it and put our text on it.
+     * Always set our Vim format.  Put Unicode and plain text on it.
+     *
+     * Don't pass GetActiveWindow() as an argument to OpenClipboard()
+     * because then we can't paste back into the same window for some
+     * reason - webb.
+     */
+    if (vim_open_clipboard())
+    {
+	if (EmptyClipboard())
+	{
+	    SetClipboardData(cbd->format, hMemVim);
+	    hMemVim = 0;
+# if defined(FEAT_MBYTE) && defined(WIN3264)
+	    if (hMemW != NULL)
+	    {
+		if (SetClipboardData(CF_UNICODETEXT, hMemW) != NULL)
+		    hMemW = NULL;
+	    }
+# endif
+	    /* Always use CF_TEXT.  On Win98 Notepad won't obtain the
+	     * CF_UNICODETEXT text, only CF_TEXT. */
+	    SetClipboardData(CF_TEXT, hMem);
+	    hMem = 0;
+	}
+	CloseClipboard();
+    }
+
+    vim_free(str);
+    /* Free any allocations we didn't give to the clipboard: */
+    if (hMemRaw)
+	GlobalFree(hMemRaw);
+    if (hMem)
+	GlobalFree(hMem);
+# if defined(FEAT_MBYTE) && defined(WIN3264)
+    if (hMemW)
+	GlobalFree(hMemW);
+# endif
+    if (hMemVim)
+	GlobalFree(hMemVim);
+}
+
+#endif /* FEAT_CLIPBOARD */
+
+#if defined(FEAT_MBYTE) || defined(PROTO)
+/*
+ * Note: the following two functions are only guaranteed to work when using
+ * valid MS-Windows codepages or when iconv() is available.
+ */
+
+/*
+ * Convert "str" from 'encoding' to UTF-16.
+ * Input in "str" with length "*lenp".  When "lenp" is NULL, use strlen().
+ * Output is returned as an allocated string.  "*lenp" is set to the length of
+ * the result.  A trailing NUL is always added.
+ * Returns NULL when out of memory.
+ */
+    short_u *
+enc_to_utf16(char_u *str, int *lenp)
+{
+    vimconv_T	conv;
+    WCHAR	*ret;
+    char_u	*allocbuf = NULL;
+    int		len_loc;
+    int		length;
+
+    if (lenp == NULL)
+    {
+	len_loc = (int)STRLEN(str) + 1;
+	lenp = &len_loc;
+    }
+
+    if (enc_codepage > 0)
+    {
+	/* We can do any CP### -> UTF-16 in one pass, and we can do it
+	 * without iconv() (convert_* may need iconv). */
+	MultiByteToWideChar_alloc(enc_codepage, 0, str, *lenp, &ret, &length);
+    }
+    else
+    {
+	/* Use "latin1" by default, we might be called before we have p_enc
+	 * set up.  Convert to utf-8 first, works better with iconv().  Does
+	 * nothing if 'encoding' is "utf-8". */
+	conv.vc_type = CONV_NONE;
+	if (convert_setup(&conv, p_enc ? p_enc : (char_u *)"latin1",
+						   (char_u *)"utf-8") == FAIL)
+	    return NULL;
+	if (conv.vc_type != CONV_NONE)
+	{
+	    str = allocbuf = string_convert(&conv, str, lenp);
+	    if (str == NULL)
+		return NULL;
+	}
+	convert_setup(&conv, NULL, NULL);
+
+	length = utf8_to_utf16(str, *lenp, NULL, NULL);
+	ret = (WCHAR *)alloc((unsigned)((length + 1) * sizeof(WCHAR)));
+	if (ret != NULL)
+	{
+	    utf8_to_utf16(str, *lenp, (short_u *)ret, NULL);
+	    ret[length] = 0;
+	}
+
+	vim_free(allocbuf);
+    }
+
+    *lenp = length;
+    return (short_u *)ret;
+}
+
+/*
+ * Convert an UTF-16 string to 'encoding'.
+ * Input in "str" with length (counted in wide characters) "*lenp".  When
+ * "lenp" is NULL, use wcslen().
+ * Output is returned as an allocated string.  If "*lenp" is not NULL it is
+ * set to the length of the result.
+ * Returns NULL when out of memory.
+ */
+    char_u *
+utf16_to_enc(short_u *str, int *lenp)
+{
+    vimconv_T	conv;
+    char_u	*utf8_str = NULL, *enc_str = NULL;
+    int		len_loc;
+
+    if (lenp == NULL)
+    {
+	len_loc = (int)wcslen(str) + 1;
+	lenp = &len_loc;
+    }
+
+    if (enc_codepage > 0)
+    {
+	/* We can do any UTF-16 -> CP### in one pass. */
+	int length;
+
+	WideCharToMultiByte_alloc(enc_codepage, 0, str, *lenp,
+					    (LPSTR *)&enc_str, &length, 0, 0);
+	*lenp = length;
+	return enc_str;
+    }
+
+    /* Avoid allocating zero bytes, it generates an error message. */
+    utf8_str = alloc(utf16_to_utf8(str, *lenp == 0 ? 1 : *lenp, NULL));
+    if (utf8_str != NULL)
+    {
+	*lenp = utf16_to_utf8(str, *lenp, utf8_str);
+
+	/* We might be called before we have p_enc set up. */
+	conv.vc_type = CONV_NONE;
+	convert_setup(&conv, (char_u *)"utf-8",
+					    p_enc? p_enc: (char_u *)"latin1");
+	if (conv.vc_type == CONV_NONE)
+	{
+	    /* p_enc is utf-8, so we're done. */
+	    enc_str = utf8_str;
+	}
+	else
+	{
+	    enc_str = string_convert(&conv, utf8_str, lenp);
+	    vim_free(utf8_str);
+	}
+
+	convert_setup(&conv, NULL, NULL);
+    }
+
+    return enc_str;
+}
+#endif /* FEAT_MBYTE */
+
+#if (defined(FEAT_MBYTE) && defined(WIN3264)) || defined(PROTO)
+/*
+ * Convert from the active codepage to 'encoding'.
+ * Input is "str[str_size]".
+ * The result is in allocated memory: "out[outlen]".  With terminating NUL.
+ */
+    void
+acp_to_enc(str, str_size, out, outlen)
+    char_u	*str;
+    int		str_size;
+    char_u	**out;
+    int		*outlen;
+
+{
+    LPWSTR	widestr;
+
+    MultiByteToWideChar_alloc(GetACP(), 0, str, str_size, &widestr, outlen);
+    if (widestr != NULL)
+    {
+	++*outlen;	/* Include the 0 after the string */
+	*out = utf16_to_enc((short_u *)widestr, outlen);
+	vim_free(widestr);
+    }
+}
+#endif