Mercurial > vim
view src/winclip.c @ 32936:c517845bd10e v9.0.1776
patch 9.0.1776: No support for stable Python 3 ABI
Commit: https://github.com/vim/vim/commit/c13b3d1350b60b94fe87f0761ea31c0e7fb6ebf3
Author: Yee Cheng Chin <ychin.git@gmail.com>
Date: Sun Aug 20 21:18:38 2023 +0200
patch 9.0.1776: No support for stable Python 3 ABI
Problem: No support for stable Python 3 ABI
Solution: Support Python 3 stable ABI
Commits:
1) Support Python 3 stable ABI to allow mixed version interoperatbility
Vim currently supports embedding Python for use with plugins, and the
"dynamic" linking option allows the user to specify a locally installed
version of Python by setting `pythonthreedll`. However, one caveat is
that the Python 3 libs are not binary compatible across minor versions,
and mixing versions can potentially be dangerous (e.g. let's say Vim was
linked against the Python 3.10 SDK, but the user sets `pythonthreedll`
to a 3.11 lib). Usually, nothing bad happens, but in theory this could
lead to crashes, memory corruption, and other unpredictable behaviors.
It's also difficult for the user to tell something is wrong because Vim
has no way of reporting what Python 3 version Vim was linked with.
For Vim installed via a package manager, this usually isn't an issue
because all the dependencies would already be figured out. For prebuilt
Vim binaries like MacVim (my motivation for working on this), AppImage,
and Win32 installer this could potentially be an issue as usually a
single binary is distributed. This is more tricky when a new Python
version is released, as there's a chicken-and-egg issue with deciding
what Python version to build against and hard to keep in sync when a new
Python version just drops and we have a mix of users of different Python
versions, and a user just blindly upgrading to a new Python could lead to
bad interactions with Vim.
Python 3 does have a solution for this problem: stable ABI / limited API
(see https://docs.python.org/3/c-api/stable.html). The C SDK limits the
API to a set of functions that are promised to be stable across
versions. This pull request adds an ifdef config that allows us to turn
it on when building Vim. Vim binaries built with this option should be
safe to freely link with any Python 3 libraies without having the
constraint of having to use the same minor version.
Note: Python 2 has no such concept and this doesn't change how Python 2
integration works (not that there is going to be a new version of Python
2 that would cause compatibility issues in the future anyway).
---
Technical details:
======
The stable ABI can be accessed when we compile with the Python 3 limited
API (by defining `Py_LIMITED_API`). The Python 3 code (in `if_python3.c`
and `if_py_both.h`) would now handle this and switch to limited API
mode. Without it set, Vim will still use the full API as before so this
is an opt-in change.
The main difference is that `PyType_Object` is now an opaque struct that
we can't directly create "static types" out of, and we have to create
type objects as "heap types" instead. This is because the struct is not
stable and changes from version to version (e.g. 3.8 added a
`tp_vectorcall` field to it). I had to change all the types to be
allocated on the heap instead with just a pointer to them.
Other functions are also simply missing in limited API, or they are
introduced too late (e.g. `PyUnicode_AsUTF8AndSize` in 3.10) to it that
we need some other ways to do the same thing, so I had to abstract a few
things into macros, and sometimes re-implement functions like
`PyObject_NEW`.
One caveat is that in limited API, `OutputType` (used for replacing
`sys.stdout`) no longer inherits from `PyStdPrinter_Type` which I don't
think has any real issue other than minor differences in how they
convert to a string and missing a couple functions like `mode()` and
`fileno()`.
Also fixed an existing bug where `tp_basicsize` was set incorrectly for
`BufferObject`, `TabListObject, `WinListObject`.
Technically, there could be a small performance drop, there is a little
more indirection with accessing type objects, and some APIs like
`PyUnicode_AsUTF8AndSize` are missing, but in practice I didn't see any
difference, and any well-written Python plugin should try to avoid
excessing callbacks to the `vim` module in Python anyway.
I only tested limited API mode down to Python 3.7, which seemes to
compile and work fine. I haven't tried earlier Python versions.
2) Fix PyIter_Check on older Python vers / type##Ptr unused warning
For PyIter_Check, older versions exposed them as either macros (used in
full API), or a function (for use in limited API). A previous change
exposed PyIter_Check to the dynamic build because Python just moved it
to function-only in 3.10 anyway. Because of that, just make sure we
always grab the function in dynamic builds in earlier versions since
that's what Python eventually did anyway.
3) Move Py_LIMITED_API define to configure script
Can now use --with-python-stable-abi flag to customize what stable ABI
version to target. Can also use an env var to do so as well.
4) Show +python/dyn-stable in :version, and allow has() feature query
Not sure if the "/dyn-stable" suffix would break things, or whether we
should do it another way. Or just don't show it in version and rely on
has() feature checking.
5) Documentation first draft. Still need to implement v:python3_version
6) Fix PyIter_Check build breaks when compiling against Python 3.8
7) Add CI coverage stable ABI on Linux/Windows / make configurable on Windows
This adds configurable options for Windows make files (both MinGW and
MSVC). CI will also now exercise both traditional full API and stable
ABI for Linux and Windows in the matrix for coverage.
Also added a "dynamic" option to Linux matrix as a drive-by change to
make other scripting languages like Ruby / Perl testable under both
static and dynamic builds.
8) Fix inaccuracy in Windows docs
Python's own docs are confusing but you don't actually want to use
`python3.dll` for the dynamic linkage.
9) Add generated autoconf file
10) Add v:python3_version support
This variable indicates the version of Python3 that Vim was built
against (PY_VERSION_HEX), and will be useful to check whether the Python
library you are loading in dynamically actually fits it. When built with
stable ABI, it will be the limited ABI version instead
(`Py_LIMITED_API`), which indicates the minimum version of Python 3 the
user should have, rather than the exact match. When stable ABI is used,
we won't be exposing PY_VERSION_HEX in this var because it just doesn't
seem necessary to do so (the whole point of stable ABI is the promise
that it will work across versions), and I don't want to confuse the user
with too many variables.
Also, cleaned up some documentation, and added help tags.
11) Fix Python 3.7 compat issues
Fix a couple issues when using limited API < 3.8
- Crash on exit: In Python 3.7, if a heap-allocated type is destroyed
before all instances are, it would cause a crash later. This happens
when we destroyed `OptionsType` before calling `Py_Finalize` when
using the limited API. To make it worse, later versions changed the
semantics and now each instance has a strong reference to its own type
and the recommendation has changed to have each instance de-ref its
own type and have its type in GC traversal. To avoid dealing with
these cross-version variations, we just don't free the heap type. They
are static types in non-limited-API anyway and are designed to last
through the entirety of the app, and we also don't restart the Python
runtime and therefore do not need it to have absolutely 0 leaks.
See:
- https://docs.python.org/3/whatsnew/3.8.html#changes-in-the-c-api
- https://docs.python.org/3/whatsnew/3.9.html#changes-in-the-c-api
- PyIter_Check: This function is not provided in limited APIs older than
3.8. Previously I was trying to mock it out using manual
PyType_GetSlot() but it was brittle and also does not actually work
properly for static types (it will generate a Python error). Just
return false. It does mean using limited API < 3.8 is not recommended
as you lose the functionality to handle iterators, but from playing
with plugins I couldn't find it to be an issue.
- Fix loading of PyIter_Check so it will be done when limited API < 3.8.
Otherwise loading a 3.7 Python lib will fail even if limited API was
specified to use it.
12) Make sure to only load `PyUnicode_AsUTF8AndSize` in needed in limited API
We don't use this function unless limited API >= 3.10, but we were
loading it regardless. Usually it's ok in Unix-like systems where Python
just has a single lib that we load from, but in Windows where there is a
separate python3.dll this would not work as the symbol would not have
been exposed in this more limited DLL file. This makes it much clearer
under what condition is this function needed.
closes: #12032
Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Yee Cheng Chin <ychin.git@gmail.com>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 20 Aug 2023 21:30:04 +0200 |
parents | 1009c33499e7 |
children |
line wrap: on
line source
/* vi:set ts=8 sts=4 sw=4 noet: * * 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 for Win32 clipboard handling. * Also used by Cygwin, using os_unix.c. */ #include "vim.h" /* * Compile only the clipboard handling features when compiling for cygwin * posix environment. */ #ifdef FEAT_CYGWIN_WIN32_CLIPBOARD # 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 /* * 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 word to avoid a zero-length alloc(). *out = ALLOC_MULT(WCHAR, *outlen + 1); if (*out == NULL) return; 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 byte to avoid a zero-length alloc(). *out = alloc(*outlen + 1); if (*out == NULL) return; WideCharToMultiByte(cp, flags, in, inlen, *out, *outlen, def, useddef); (*out)[*outlen] = 0; } #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. * "Clipboard_T" 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. */ int clip_mch_own_selection(Clipboard_T *cbd UNUSED) { /* * 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. */ void clip_mch_lose_selection(Clipboard_T *cbd UNUSED) { // 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 = alloc(str_len == 0 ? 1 : str_len); 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(Clipboard_T *cbd) { VimClipType_t metadata = { -1, -1, -1, -1 }; HGLOBAL hMem = NULL; char_u *str = NULL; char_u *to_free = NULL; HGLOBAL rawh = NULL; 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); } } // 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) { // 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); } } // Get the clipboard in the Active codepage. else 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; } // 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; } } } } if (str != NULL && metadata.txtlen != 0) { 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); if (rawh != NULL) GlobalUnlock(rawh); CloseClipboard(); vim_free(to_free); } /* * Send the current selection to the clipboard. */ void clip_mch_set_selection(Clipboard_T *cbd) { char_u *str = NULL; VimClipType_t metadata; long_u txtlen; HGLOBAL hMemRaw = NULL; HGLOBAL hMem = NULL; HGLOBAL hMemVim = NULL; HGLOBAL hMemW = NULL; // 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; // 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; } { 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 = alloc(metadata.txtlen == 0 ? 1 : metadata.txtlen); if (str == NULL) { vim_free(out); return; // out of memory } WideCharToMultiByte(GetACP(), 0, out, len, (LPSTR)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; } } // 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) { mch_memmove((char_u *)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 (hMemW != NULL) { if (SetClipboardData(CF_UNICODETEXT, hMemW) != NULL) hMemW = NULL; } // 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 (hMemW) GlobalFree(hMemW); if (hMemVim) GlobalFree(hMemVim); } #endif // FEAT_CLIPBOARD /* * 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, (LPCSTR)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 = ALLOC_MULT(WCHAR, length + 1); 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; } /* * Convert from the active codepage to 'encoding'. * Input is "str[str_size]". * The result is in allocated memory: "out[outlen]". "outlen" includes the * terminating NUL. */ void acp_to_enc( char_u *str, int str_size, char_u **out, int *outlen) { LPWSTR widestr; MultiByteToWideChar_alloc(GetACP(), 0, (LPCSTR)str, str_size, &widestr, outlen); if (widestr == NULL) return; ++*outlen; // Include the 0 after the string *out = utf16_to_enc((short_u *)widestr, outlen); vim_free(widestr); } /* * Convert from 'encoding' to the active codepage. * Input is "str[str_size]". * The result is in allocated memory: "out[outlen]". With terminating NUL. */ void enc_to_acp( char_u *str, int str_size, char_u **out, int *outlen) { LPWSTR widestr; int len = str_size; widestr = (WCHAR *)enc_to_utf16(str, &len); if (widestr == NULL) return; WideCharToMultiByte_alloc(GetACP(), 0, widestr, len, (LPSTR *)out, outlen, 0, 0); vim_free(widestr); }