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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 08:50:31 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 08:50:31 +0000
commitaed8ce9da277f5ecffe968b324f242c41c3b752a (patch)
treed2e538394cb7a8a7c42a4aac6ccf1a8e3256999b /src/mbyte.c
parentInitial commit. (diff)
downloadvim-aed8ce9da277f5ecffe968b324f242c41c3b752a.tar.xz
vim-aed8ce9da277f5ecffe968b324f242c41c3b752a.zip
Adding upstream version 2:9.0.1378.upstream/2%9.0.1378upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/mbyte.c')
-rw-r--r--src/mbyte.c5785
1 files changed, 5785 insertions, 0 deletions
diff --git a/src/mbyte.c b/src/mbyte.c
new file mode 100644
index 0000000..57aa619
--- /dev/null
+++ b/src/mbyte.c
@@ -0,0 +1,5785 @@
+/* vi:set ts=8 sts=4 sw=4 noet:
+ *
+ * VIM - Vi IMproved by Bram Moolenaar
+ * Multibyte extensions partly by Sung-Hoon Baek
+ *
+ * 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.
+ */
+/*
+ * mbyte.c: Code specifically for handling multi-byte characters.
+ *
+ * The encoding used in the core is set with 'encoding'. When 'encoding' is
+ * changed, the following four variables are set (for speed).
+ * Currently these types of character encodings are supported:
+ *
+ * "enc_dbcs" When non-zero it tells the type of double byte character
+ * encoding (Chinese, Korean, Japanese, etc.).
+ * The cell width on the display is equal to the number of
+ * bytes. (exception: DBCS_JPNU with first byte 0x8e)
+ * Recognizing the first or second byte is difficult, it
+ * requires checking a byte sequence from the start.
+ * "enc_utf8" When TRUE use Unicode characters in UTF-8 encoding.
+ * The cell width on the display needs to be determined from
+ * the character value.
+ * Recognizing bytes is easy: 0xxx.xxxx is a single-byte
+ * char, 10xx.xxxx is a trailing byte, 11xx.xxxx is a leading
+ * byte of a multi-byte character.
+ * To make things complicated, up to six composing characters
+ * are allowed. These are drawn on top of the first char.
+ * For most editing the sequence of bytes with composing
+ * characters included is considered to be one character.
+ * "enc_unicode" When 2 use 16-bit Unicode characters (or UTF-16).
+ * When 4 use 32-but Unicode characters.
+ * Internally characters are stored in UTF-8 encoding to
+ * avoid NUL bytes. Conversion happens when doing I/O.
+ * "enc_utf8" will also be TRUE.
+ *
+ * "has_mbyte" is set when "enc_dbcs" or "enc_utf8" is non-zero.
+ *
+ * If none of these is TRUE, 8-bit bytes are used for a character. The
+ * encoding isn't currently specified (TODO).
+ *
+ * 'encoding' specifies the encoding used in the core. This is in registers,
+ * text manipulation, buffers, etc. Conversion has to be done when characters
+ * in another encoding are received or send:
+ *
+ * clipboard
+ * ^
+ * | (2)
+ * V
+ * +---------------+
+ * (1) | | (3)
+ * keyboard ----->| core |-----> display
+ * | |
+ * +---------------+
+ * ^
+ * | (4)
+ * V
+ * file
+ *
+ * (1) Typed characters arrive in the current locale. Conversion is to be
+ * done when 'encoding' is different from 'termencoding'.
+ * (2) Text will be made available with the encoding specified with
+ * 'encoding'. If this is not sufficient, system-specific conversion
+ * might be required.
+ * (3) For the GUI the correct font must be selected, no conversion done.
+ * Otherwise, conversion is to be done when 'encoding' differs from
+ * 'termencoding'. (Different in the GTK+ 2 port -- 'termencoding'
+ * is always used for both input and output and must always be set to
+ * "utf-8". gui_mch_init() does this automatically.)
+ * (4) The encoding of the file is specified with 'fileencoding'. Conversion
+ * is to be done when it's different from 'encoding'.
+ *
+ * The viminfo file is a special case: Only text is converted, not file names.
+ * Vim scripts may contain an ":encoding" command. This has an effect for
+ * some commands, like ":menutrans"
+ */
+
+#include "vim.h"
+
+#ifdef WIN32UNIX
+# ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+# endif
+# if defined(FEAT_GUI) || defined(FEAT_XCLIPBOARD)
+# ifdef __CYGWIN__
+ // ControlMask from <X11/X.h> (included in "vim.h") is conflicting with
+ // <w32api/windows.h> (included in <X11/Xwindows.h>).
+# undef ControlMask
+# endif
+# include <X11/Xwindows.h>
+# define WINBYTE wBYTE
+# else
+# include <windows.h>
+# define WINBYTE BYTE
+# endif
+# ifdef WIN32
+# undef WIN32 // Some windows.h define WIN32, we don't want that here.
+# endif
+#else
+# define WINBYTE BYTE
+#endif
+
+#if (defined(MSWIN) || defined(WIN32UNIX)) && !defined(__MINGW32__)
+# include <winnls.h>
+#endif
+
+#ifdef FEAT_GUI_X11
+# include <X11/Intrinsic.h>
+#endif
+#ifdef X_LOCALE
+# include <X11/Xlocale.h>
+# if !defined(HAVE_MBLEN) && !defined(mblen)
+# define mblen _Xmblen
+# endif
+#endif
+
+#ifdef HAVE_WCHAR_H
+# include <wchar.h>
+#endif
+
+#if 0
+// This has been disabled, because several people reported problems with the
+// wcwidth() and iswprint() library functions, esp. for Hebrew.
+# ifdef __STDC_ISO_10646__
+# define USE_WCHAR_FUNCTIONS
+# endif
+#endif
+
+static int dbcs_char2len(int c);
+static int dbcs_char2bytes(int c, char_u *buf);
+static int dbcs_ptr2len(char_u *p);
+static int dbcs_ptr2len_len(char_u *p, int size);
+static int utf_ptr2cells_len(char_u *p, int size);
+static int dbcs_char2cells(int c);
+static int dbcs_ptr2cells_len(char_u *p, int size);
+static int dbcs_ptr2char(char_u *p);
+static int dbcs_head_off(char_u *base, char_u *p);
+#ifdef FEAT_EVAL
+static int cw_value(int c);
+#endif
+
+/*
+ * Lookup table to quickly get the length in bytes of a UTF-8 character from
+ * the first byte of a UTF-8 string.
+ * Bytes which are illegal when used as the first byte have a 1.
+ * The NUL byte has length 1.
+ */
+static char utf8len_tab[256] =
+{
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1,
+};
+
+/*
+ * Like utf8len_tab above, but using a zero for illegal lead bytes.
+ */
+static char utf8len_tab_zero[256] =
+{
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0,
+};
+
+
+/*
+ * Canonical encoding names and their properties.
+ * "iso-8859-n" is handled by enc_canonize() directly.
+ */
+static struct
+{ char *name; int prop; int codepage;}
+enc_canon_table[] =
+{
+#define IDX_LATIN_1 0
+ {"latin1", ENC_8BIT + ENC_LATIN1, 1252},
+#define IDX_ISO_2 1
+ {"iso-8859-2", ENC_8BIT, 0},
+#define IDX_ISO_3 2
+ {"iso-8859-3", ENC_8BIT, 0},
+#define IDX_ISO_4 3
+ {"iso-8859-4", ENC_8BIT, 0},
+#define IDX_ISO_5 4
+ {"iso-8859-5", ENC_8BIT, 0},
+#define IDX_ISO_6 5
+ {"iso-8859-6", ENC_8BIT, 0},
+#define IDX_ISO_7 6
+ {"iso-8859-7", ENC_8BIT, 0},
+#define IDX_ISO_8 7
+ {"iso-8859-8", ENC_8BIT, 0},
+#define IDX_ISO_9 8
+ {"iso-8859-9", ENC_8BIT, 0},
+#define IDX_ISO_10 9
+ {"iso-8859-10", ENC_8BIT, 0},
+#define IDX_ISO_11 10
+ {"iso-8859-11", ENC_8BIT, 0},
+#define IDX_ISO_13 11
+ {"iso-8859-13", ENC_8BIT, 0},
+#define IDX_ISO_14 12
+ {"iso-8859-14", ENC_8BIT, 0},
+#define IDX_ISO_15 13
+ {"iso-8859-15", ENC_8BIT + ENC_LATIN9, 0},
+#define IDX_KOI8_R 14
+ {"koi8-r", ENC_8BIT, 0},
+#define IDX_KOI8_U 15
+ {"koi8-u", ENC_8BIT, 0},
+#define IDX_UTF8 16
+ {"utf-8", ENC_UNICODE, 0},
+#define IDX_UCS2 17
+ {"ucs-2", ENC_UNICODE + ENC_ENDIAN_B + ENC_2BYTE, 0},
+#define IDX_UCS2LE 18
+ {"ucs-2le", ENC_UNICODE + ENC_ENDIAN_L + ENC_2BYTE, 0},
+#define IDX_UTF16 19
+ {"utf-16", ENC_UNICODE + ENC_ENDIAN_B + ENC_2WORD, 0},
+#define IDX_UTF16LE 20
+ {"utf-16le", ENC_UNICODE + ENC_ENDIAN_L + ENC_2WORD, 0},
+#define IDX_UCS4 21
+ {"ucs-4", ENC_UNICODE + ENC_ENDIAN_B + ENC_4BYTE, 0},
+#define IDX_UCS4LE 22
+ {"ucs-4le", ENC_UNICODE + ENC_ENDIAN_L + ENC_4BYTE, 0},
+
+ // For debugging DBCS encoding on Unix.
+#define IDX_DEBUG 23
+ {"debug", ENC_DBCS, DBCS_DEBUG},
+#define IDX_EUC_JP 24
+ {"euc-jp", ENC_DBCS, DBCS_JPNU},
+#define IDX_SJIS 25
+ {"sjis", ENC_DBCS, DBCS_JPN},
+#define IDX_EUC_KR 26
+ {"euc-kr", ENC_DBCS, DBCS_KORU},
+#define IDX_EUC_CN 27
+ {"euc-cn", ENC_DBCS, DBCS_CHSU},
+#define IDX_EUC_TW 28
+ {"euc-tw", ENC_DBCS, DBCS_CHTU},
+#define IDX_BIG5 29
+ {"big5", ENC_DBCS, DBCS_CHT},
+
+ // MS-DOS and MS-Windows codepages are included here, so that they can be
+ // used on Unix too. Most of them are similar to ISO-8859 encodings, but
+ // not exactly the same.
+#define IDX_CP437 30
+ {"cp437", ENC_8BIT, 437}, // like iso-8859-1
+#define IDX_CP737 31
+ {"cp737", ENC_8BIT, 737}, // like iso-8859-7
+#define IDX_CP775 32
+ {"cp775", ENC_8BIT, 775}, // Baltic
+#define IDX_CP850 33
+ {"cp850", ENC_8BIT, 850}, // like iso-8859-4
+#define IDX_CP852 34
+ {"cp852", ENC_8BIT, 852}, // like iso-8859-1
+#define IDX_CP855 35
+ {"cp855", ENC_8BIT, 855}, // like iso-8859-2
+#define IDX_CP857 36
+ {"cp857", ENC_8BIT, 857}, // like iso-8859-5
+#define IDX_CP860 37
+ {"cp860", ENC_8BIT, 860}, // like iso-8859-9
+#define IDX_CP861 38
+ {"cp861", ENC_8BIT, 861}, // like iso-8859-1
+#define IDX_CP862 39
+ {"cp862", ENC_8BIT, 862}, // like iso-8859-1
+#define IDX_CP863 40
+ {"cp863", ENC_8BIT, 863}, // like iso-8859-8
+#define IDX_CP865 41
+ {"cp865", ENC_8BIT, 865}, // like iso-8859-1
+#define IDX_CP866 42
+ {"cp866", ENC_8BIT, 866}, // like iso-8859-5
+#define IDX_CP869 43
+ {"cp869", ENC_8BIT, 869}, // like iso-8859-7
+#define IDX_CP874 44
+ {"cp874", ENC_8BIT, 874}, // Thai
+#define IDX_CP932 45
+ {"cp932", ENC_DBCS, DBCS_JPN},
+#define IDX_CP936 46
+ {"cp936", ENC_DBCS, DBCS_CHS},
+#define IDX_CP949 47
+ {"cp949", ENC_DBCS, DBCS_KOR},
+#define IDX_CP950 48
+ {"cp950", ENC_DBCS, DBCS_CHT},
+#define IDX_CP1250 49
+ {"cp1250", ENC_8BIT, 1250}, // Czech, Polish, etc.
+#define IDX_CP1251 50
+ {"cp1251", ENC_8BIT, 1251}, // Cyrillic
+ // cp1252 is considered to be equal to latin1
+#define IDX_CP1253 51
+ {"cp1253", ENC_8BIT, 1253}, // Greek
+#define IDX_CP1254 52
+ {"cp1254", ENC_8BIT, 1254}, // Turkish
+#define IDX_CP1255 53
+ {"cp1255", ENC_8BIT, 1255}, // Hebrew
+#define IDX_CP1256 54
+ {"cp1256", ENC_8BIT, 1256}, // Arabic
+#define IDX_CP1257 55
+ {"cp1257", ENC_8BIT, 1257}, // Baltic
+#define IDX_CP1258 56
+ {"cp1258", ENC_8BIT, 1258}, // Vietnamese
+
+#define IDX_MACROMAN 57
+ {"macroman", ENC_8BIT + ENC_MACROMAN, 0}, // Mac OS
+#define IDX_DECMCS 58
+ {"dec-mcs", ENC_8BIT, 0}, // DEC MCS
+#define IDX_HPROMAN8 59
+ {"hp-roman8", ENC_8BIT, 0}, // HP Roman8
+#define IDX_COUNT 60
+};
+
+/*
+ * Aliases for encoding names.
+ */
+static struct
+{ char *name; int canon;}
+enc_alias_table[] =
+{
+ {"ansi", IDX_LATIN_1},
+ {"iso-8859-1", IDX_LATIN_1},
+ {"iso-8859", IDX_LATIN_1},
+ {"latin2", IDX_ISO_2},
+ {"latin3", IDX_ISO_3},
+ {"latin4", IDX_ISO_4},
+ {"cyrillic", IDX_ISO_5},
+ {"arabic", IDX_ISO_6},
+ {"greek", IDX_ISO_7},
+#ifdef MSWIN
+ {"hebrew", IDX_CP1255},
+#else
+ {"hebrew", IDX_ISO_8},
+#endif
+ {"latin5", IDX_ISO_9},
+ {"turkish", IDX_ISO_9}, // ?
+ {"latin6", IDX_ISO_10},
+ {"nordic", IDX_ISO_10}, // ?
+ {"thai", IDX_ISO_11}, // ?
+ {"latin7", IDX_ISO_13},
+ {"latin8", IDX_ISO_14},
+ {"latin9", IDX_ISO_15},
+ {"utf8", IDX_UTF8},
+ {"unicode", IDX_UCS2},
+ {"ucs2", IDX_UCS2},
+ {"ucs2be", IDX_UCS2},
+ {"ucs-2be", IDX_UCS2},
+ {"ucs2le", IDX_UCS2LE},
+ {"utf16", IDX_UTF16},
+ {"utf16be", IDX_UTF16},
+ {"utf-16be", IDX_UTF16},
+ {"utf16le", IDX_UTF16LE},
+ {"ucs4", IDX_UCS4},
+ {"ucs4be", IDX_UCS4},
+ {"ucs-4be", IDX_UCS4},
+ {"ucs4le", IDX_UCS4LE},
+ {"utf32", IDX_UCS4},
+ {"utf-32", IDX_UCS4},
+ {"utf32be", IDX_UCS4},
+ {"utf-32be", IDX_UCS4},
+ {"utf32le", IDX_UCS4LE},
+ {"utf-32le", IDX_UCS4LE},
+ {"932", IDX_CP932},
+ {"949", IDX_CP949},
+ {"936", IDX_CP936},
+ {"gbk", IDX_CP936},
+ {"950", IDX_CP950},
+ {"eucjp", IDX_EUC_JP},
+ {"unix-jis", IDX_EUC_JP},
+ {"ujis", IDX_EUC_JP},
+ {"shift-jis", IDX_SJIS},
+ {"pck", IDX_SJIS}, // Sun: PCK
+ {"euckr", IDX_EUC_KR},
+ {"5601", IDX_EUC_KR}, // Sun: KS C 5601
+ {"euccn", IDX_EUC_CN},
+ {"gb2312", IDX_EUC_CN},
+ {"euctw", IDX_EUC_TW},
+#if defined(MSWIN) || defined(WIN32UNIX) || defined(MACOS_X)
+ {"japan", IDX_CP932},
+ {"korea", IDX_CP949},
+ {"prc", IDX_CP936},
+ {"chinese", IDX_CP936},
+ {"taiwan", IDX_CP950},
+ {"big5", IDX_CP950},
+#else
+ {"japan", IDX_EUC_JP},
+ {"korea", IDX_EUC_KR},
+ {"prc", IDX_EUC_CN},
+ {"chinese", IDX_EUC_CN},
+ {"taiwan", IDX_EUC_TW},
+ {"cp950", IDX_BIG5},
+ {"950", IDX_BIG5},
+#endif
+ {"mac", IDX_MACROMAN},
+ {"mac-roman", IDX_MACROMAN},
+ {NULL, 0}
+};
+
+#ifndef CP_UTF8
+# define CP_UTF8 65001 // magic number from winnls.h
+#endif
+
+/*
+ * Find encoding "name" in the list of canonical encoding names.
+ * Returns -1 if not found.
+ */
+ static int
+enc_canon_search(char_u *name)
+{
+ int i;
+
+ for (i = 0; i < IDX_COUNT; ++i)
+ if (STRCMP(name, enc_canon_table[i].name) == 0)
+ return i;
+ return -1;
+}
+
+
+/*
+ * Find canonical encoding "name" in the list and return its properties.
+ * Returns 0 if not found.
+ */
+ int
+enc_canon_props(char_u *name)
+{
+ int i;
+
+ i = enc_canon_search(name);
+ if (i >= 0)
+ return enc_canon_table[i].prop;
+#ifdef MSWIN
+ if (name[0] == 'c' && name[1] == 'p' && VIM_ISDIGIT(name[2]))
+ {
+ CPINFO cpinfo;
+
+ // Get info on this codepage to find out what it is.
+ if (GetCPInfo(atoi((char *)name + 2), &cpinfo) != 0)
+ {
+ if (cpinfo.MaxCharSize == 1) // some single-byte encoding
+ return ENC_8BIT;
+ if (cpinfo.MaxCharSize == 2
+ && (cpinfo.LeadByte[0] != 0 || cpinfo.LeadByte[1] != 0))
+ // must be a DBCS encoding
+ return ENC_DBCS;
+ }
+ return 0;
+ }
+#endif
+ if (STRNCMP(name, "2byte-", 6) == 0)
+ return ENC_DBCS;
+ if (STRNCMP(name, "8bit-", 5) == 0 || STRNCMP(name, "iso-8859-", 9) == 0)
+ return ENC_8BIT;
+ return 0;
+}
+
+/*
+ * Set up for using multi-byte characters.
+ * Called in three cases:
+ * - by main() to initialize (p_enc == NULL)
+ * - by set_init_1() after 'encoding' was set to its default.
+ * - by do_set() when 'encoding' has been set.
+ * p_enc must have been passed through enc_canonize() already.
+ * Sets the "enc_unicode", "enc_utf8", "enc_dbcs" and "has_mbyte" flags.
+ * Fills mb_bytelen_tab[] and returns NULL when there are no problems.
+ * When there is something wrong: Returns an error message and doesn't change
+ * anything.
+ */
+ char *
+mb_init(void)
+{
+ int i;
+ int idx;
+ int n;
+ int enc_dbcs_new = 0;
+#if defined(USE_ICONV) && !defined(MSWIN) && !defined(WIN32UNIX) \
+ && !defined(MACOS_CONVERT)
+# define LEN_FROM_CONV
+ vimconv_T vimconv;
+ char_u *p;
+#endif
+
+ if (p_enc == NULL)
+ {
+ // Just starting up: set the whole table to one's.
+ for (i = 0; i < 256; ++i)
+ mb_bytelen_tab[i] = 1;
+ input_conv.vc_type = CONV_NONE;
+ input_conv.vc_factor = 1;
+ output_conv.vc_type = CONV_NONE;
+ return NULL;
+ }
+
+#ifdef MSWIN
+ if (p_enc[0] == 'c' && p_enc[1] == 'p' && VIM_ISDIGIT(p_enc[2]))
+ {
+ CPINFO cpinfo;
+
+ // Get info on this codepage to find out what it is.
+ if (GetCPInfo(atoi((char *)p_enc + 2), &cpinfo) != 0)
+ {
+ if (cpinfo.MaxCharSize == 1)
+ {
+ // some single-byte encoding
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ else if (cpinfo.MaxCharSize == 2
+ && (cpinfo.LeadByte[0] != 0 || cpinfo.LeadByte[1] != 0))
+ {
+ // must be a DBCS encoding, check below
+ enc_dbcs_new = atoi((char *)p_enc + 2);
+ }
+ else
+ goto codepage_invalid;
+ }
+ else if (GetLastError() == ERROR_INVALID_PARAMETER)
+ {
+codepage_invalid:
+ return N_(e_not_valid_codepage);
+ }
+ }
+#endif
+ else if (STRNCMP(p_enc, "8bit-", 5) == 0
+ || STRNCMP(p_enc, "iso-8859-", 9) == 0)
+ {
+ // Accept any "8bit-" or "iso-8859-" name.
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ else if (STRNCMP(p_enc, "2byte-", 6) == 0)
+ {
+#ifdef MSWIN
+ // Windows: accept only valid codepage numbers, check below.
+ if (p_enc[6] != 'c' || p_enc[7] != 'p'
+ || (enc_dbcs_new = atoi((char *)p_enc + 8)) == 0)
+ return e_invalid_argument;
+#else
+ // Unix: accept any "2byte-" name, assume current locale.
+ enc_dbcs_new = DBCS_2BYTE;
+#endif
+ }
+ else if ((idx = enc_canon_search(p_enc)) >= 0)
+ {
+ i = enc_canon_table[idx].prop;
+ if (i & ENC_UNICODE)
+ {
+ // Unicode
+ enc_utf8 = TRUE;
+ if (i & (ENC_2BYTE | ENC_2WORD))
+ enc_unicode = 2;
+ else if (i & ENC_4BYTE)
+ enc_unicode = 4;
+ else
+ enc_unicode = 0;
+ }
+ else if (i & ENC_DBCS)
+ {
+ // 2byte, handle below
+ enc_dbcs_new = enc_canon_table[idx].codepage;
+ }
+ else
+ {
+ // Must be 8-bit.
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ }
+ else // Don't know what encoding this is, reject it.
+ return e_invalid_argument;
+
+ if (enc_dbcs_new != 0)
+ {
+#ifdef MSWIN
+ // Check if the DBCS code page is OK.
+ if (!IsValidCodePage(enc_dbcs_new))
+ goto codepage_invalid;
+#endif
+ enc_unicode = 0;
+ enc_utf8 = FALSE;
+ }
+ enc_dbcs = enc_dbcs_new;
+ has_mbyte = (enc_dbcs != 0 || enc_utf8);
+
+#if defined(MSWIN) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+ enc_codepage = encname2codepage(p_enc);
+ enc_latin9 = (STRCMP(p_enc, "iso-8859-15") == 0);
+#endif
+
+ // Detect an encoding that uses latin1 characters.
+ enc_latin1like = (enc_utf8 || STRCMP(p_enc, "latin1") == 0
+ || STRCMP(p_enc, "iso-8859-15") == 0);
+
+ /*
+ * Set the function pointers.
+ */
+ if (enc_utf8)
+ {
+ mb_ptr2len = utfc_ptr2len;
+ mb_ptr2len_len = utfc_ptr2len_len;
+ mb_char2len = utf_char2len;
+ mb_char2bytes = utf_char2bytes;
+ mb_ptr2cells = utf_ptr2cells;
+ mb_ptr2cells_len = utf_ptr2cells_len;
+ mb_char2cells = utf_char2cells;
+ mb_off2cells = utf_off2cells;
+ mb_ptr2char = utf_ptr2char;
+ mb_head_off = utf_head_off;
+ }
+ else if (enc_dbcs != 0)
+ {
+ mb_ptr2len = dbcs_ptr2len;
+ mb_ptr2len_len = dbcs_ptr2len_len;
+ mb_char2len = dbcs_char2len;
+ mb_char2bytes = dbcs_char2bytes;
+ mb_ptr2cells = dbcs_ptr2cells;
+ mb_ptr2cells_len = dbcs_ptr2cells_len;
+ mb_char2cells = dbcs_char2cells;
+ mb_off2cells = dbcs_off2cells;
+ mb_ptr2char = dbcs_ptr2char;
+ mb_head_off = dbcs_head_off;
+ }
+ else
+ {
+ mb_ptr2len = latin_ptr2len;
+ mb_ptr2len_len = latin_ptr2len_len;
+ mb_char2len = latin_char2len;
+ mb_char2bytes = latin_char2bytes;
+ mb_ptr2cells = latin_ptr2cells;
+ mb_ptr2cells_len = latin_ptr2cells_len;
+ mb_char2cells = latin_char2cells;
+ mb_off2cells = latin_off2cells;
+ mb_ptr2char = latin_ptr2char;
+ mb_head_off = latin_head_off;
+ }
+
+ /*
+ * Fill the mb_bytelen_tab[] for MB_BYTE2LEN().
+ */
+#ifdef LEN_FROM_CONV
+ // When 'encoding' is different from the current locale mblen() won't
+ // work. Use conversion to "utf-8" instead.
+ vimconv.vc_type = CONV_NONE;
+ if (enc_dbcs)
+ {
+ p = enc_locale();
+ if (p == NULL || STRCMP(p, p_enc) != 0)
+ {
+ convert_setup(&vimconv, p_enc, (char_u *)"utf-8");
+ vimconv.vc_fail = TRUE;
+ }
+ vim_free(p);
+ }
+#endif
+
+ for (i = 0; i < 256; ++i)
+ {
+ // Our own function to reliably check the length of UTF-8 characters,
+ // independent of mblen().
+ if (enc_utf8)
+ n = utf8len_tab[i];
+ else if (enc_dbcs == 0)
+ n = 1;
+ else
+ {
+#if defined(MSWIN) || defined(WIN32UNIX)
+ // enc_dbcs is set by setting 'fileencoding'. It becomes a Windows
+ // CodePage identifier, which we can pass directly in to Windows
+ // API
+ n = IsDBCSLeadByteEx(enc_dbcs, (WINBYTE)i) ? 2 : 1;
+#else
+# if defined(__amigaos4__) || defined(__ANDROID__) || \
+ !(defined(HAVE_MBLEN) || defined(X_LOCALE))
+ /*
+ * if mblen() is not available, character which MSB is turned on
+ * are treated as leading byte character. (note : This assumption
+ * is not always true.)
+ */
+ n = (i & 0x80) ? 2 : 1;
+# else
+ char buf[MB_MAXBYTES + 1];
+
+ if (i == NUL) // just in case mblen() can't handle ""
+ n = 1;
+ else
+ {
+ buf[0] = i;
+ buf[1] = 0;
+# ifdef LEN_FROM_CONV
+ if (vimconv.vc_type != CONV_NONE)
+ {
+ /*
+ * string_convert() should fail when converting the first
+ * byte of a double-byte character.
+ */
+ p = string_convert(&vimconv, (char_u *)buf, NULL);
+ if (p != NULL)
+ {
+ vim_free(p);
+ n = 1;
+ }
+ else
+ n = 2;
+ }
+ else
+# endif
+ {
+ /*
+ * mblen() should return -1 for invalid (means the leading
+ * multibyte) character. However there are some platforms
+ * where mblen() returns 0 for invalid character.
+ * Therefore, following condition includes 0.
+ */
+ vim_ignored = mblen(NULL, 0); // First reset the state.
+ if (mblen(buf, (size_t)1) <= 0)
+ n = 2;
+ else
+ n = 1;
+ }
+ }
+# endif
+#endif
+ }
+
+ mb_bytelen_tab[i] = n;
+ }
+
+#ifdef LEN_FROM_CONV
+ convert_setup(&vimconv, NULL, NULL);
+#endif
+
+ // The cell width depends on the type of multi-byte characters.
+ (void)init_chartab();
+
+ // When enc_utf8 is set or reset, (de)allocate ScreenLinesUC[]
+ screenalloc(FALSE);
+
+ // When using Unicode, set default for 'fileencodings'.
+ if (enc_utf8 && !option_was_set((char_u *)"fencs"))
+ set_fencs_unicode();
+
+#if defined(HAVE_BIND_TEXTDOMAIN_CODESET) && defined(FEAT_GETTEXT)
+ // GNU gettext 0.10.37 supports this feature: set the codeset used for
+ // translated messages independently from the current locale.
+ (void)bind_textdomain_codeset(VIMPACKAGE,
+ enc_utf8 ? "utf-8" : (char *)p_enc);
+#endif
+
+#ifdef MSWIN
+ // When changing 'encoding' while starting up, then convert the command
+ // line arguments from the active codepage to 'encoding'.
+ if (starting != 0)
+ fix_arg_enc();
+#endif
+
+ // Fire an autocommand to let people do custom font setup. This must be
+ // after Vim has been setup for the new encoding.
+ apply_autocmds(EVENT_ENCODINGCHANGED, NULL, (char_u *)"", FALSE, curbuf);
+
+#ifdef FEAT_SPELL
+ // Need to reload spell dictionaries
+ spell_reload();
+#endif
+
+ return NULL;
+}
+
+/*
+ * Return the size of the BOM for the current buffer:
+ * 0 - no BOM
+ * 2 - UCS-2 or UTF-16 BOM
+ * 4 - UCS-4 BOM
+ * 3 - UTF-8 BOM
+ */
+ int
+bomb_size(void)
+{
+ int n = 0;
+
+ if (curbuf->b_p_bomb && !curbuf->b_p_bin)
+ {
+ if (*curbuf->b_p_fenc == NUL)
+ {
+ if (enc_utf8)
+ {
+ if (enc_unicode != 0)
+ n = enc_unicode;
+ else
+ n = 3;
+ }
+ }
+ else if (STRCMP(curbuf->b_p_fenc, "utf-8") == 0)
+ n = 3;
+ else if (STRNCMP(curbuf->b_p_fenc, "ucs-2", 5) == 0
+ || STRNCMP(curbuf->b_p_fenc, "utf-16", 6) == 0)
+ n = 2;
+ else if (STRNCMP(curbuf->b_p_fenc, "ucs-4", 5) == 0)
+ n = 4;
+ }
+ return n;
+}
+
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
+/*
+ * Remove all BOM from "s" by moving remaining text.
+ */
+ void
+remove_bom(char_u *s)
+{
+ if (!enc_utf8)
+ return;
+
+ char_u *p = s;
+
+ while ((p = vim_strbyte(p, 0xef)) != NULL)
+ {
+ if (p[1] == 0xbb && p[2] == 0xbf)
+ STRMOVE(p, p + 3);
+ else
+ ++p;
+ }
+}
+#endif
+
+/*
+ * Get class of pointer:
+ * 0 for blank or NUL
+ * 1 for punctuation
+ * 2 for an (ASCII) word character
+ * >2 for other word characters
+ */
+ int
+mb_get_class(char_u *p)
+{
+ return mb_get_class_buf(p, curbuf);
+}
+
+ int
+mb_get_class_buf(char_u *p, buf_T *buf)
+{
+ if (MB_BYTE2LEN(p[0]) == 1)
+ {
+ if (p[0] == NUL || VIM_ISWHITE(p[0]))
+ return 0;
+ if (vim_iswordc_buf(p[0], buf))
+ return 2;
+ return 1;
+ }
+ if (enc_dbcs != 0 && p[0] != NUL && p[1] != NUL)
+ return dbcs_class(p[0], p[1]);
+ if (enc_utf8)
+ return utf_class_buf(utf_ptr2char(p), buf);
+ return 0;
+}
+
+/*
+ * Get class of a double-byte character. This always returns 3 or bigger.
+ * TODO: Should return 1 for punctuation.
+ */
+ int
+dbcs_class(unsigned lead, unsigned trail)
+{
+ switch (enc_dbcs)
+ {
+ // please add classify routine for your language in here
+
+ case DBCS_JPNU: // ?
+ case DBCS_JPN:
+ {
+ // JIS code classification
+ unsigned char lb = lead;
+ unsigned char tb = trail;
+
+ // convert process code to JIS
+# if defined(MSWIN) || defined(WIN32UNIX) || defined(MACOS_X)
+ // process code is SJIS
+ if (lb <= 0x9f)
+ lb = (lb - 0x81) * 2 + 0x21;
+ else
+ lb = (lb - 0xc1) * 2 + 0x21;
+ if (tb <= 0x7e)
+ tb -= 0x1f;
+ else if (tb <= 0x9e)
+ tb -= 0x20;
+ else
+ {
+ tb -= 0x7e;
+ lb += 1;
+ }
+# else
+ /*
+ * XXX: Code page identification can not use with all
+ * system! So, some other encoding information
+ * will be needed.
+ * In japanese: SJIS,EUC,UNICODE,(JIS)
+ * Note that JIS-code system don't use as
+ * process code in most system because it uses
+ * escape sequences(JIS is context depend encoding).
+ */
+ // assume process code is JAPANESE-EUC
+ lb &= 0x7f;
+ tb &= 0x7f;
+# endif
+ // exceptions
+ switch (lb << 8 | tb)
+ {
+ case 0x2121: // ZENKAKU space
+ return 0;
+ case 0x2122: // TOU-TEN (Japanese comma)
+ case 0x2123: // KU-TEN (Japanese period)
+ case 0x2124: // ZENKAKU comma
+ case 0x2125: // ZENKAKU period
+ return 1;
+ case 0x213c: // prolongedsound handled as KATAKANA
+ return 13;
+ }
+ // sieved by KU code
+ switch (lb)
+ {
+ case 0x21:
+ case 0x22:
+ // special symbols
+ return 10;
+ case 0x23:
+ // alphanumeric
+ return 11;
+ case 0x24:
+ // hiragana
+ return 12;
+ case 0x25:
+ // katakana
+ return 13;
+ case 0x26:
+ // greek
+ return 14;
+ case 0x27:
+ // russian
+ return 15;
+ case 0x28:
+ // lines
+ return 16;
+ default:
+ // kanji
+ return 17;
+ }
+ }
+
+ case DBCS_KORU: // ?
+ case DBCS_KOR:
+ {
+ // KS code classification
+ unsigned char c1 = lead;
+ unsigned char c2 = trail;
+
+ /*
+ * 20 : Hangul
+ * 21 : Hanja
+ * 22 : Symbols
+ * 23 : Alphanumeric/Roman Letter (Full width)
+ * 24 : Hangul Letter(Alphabet)
+ * 25 : Roman Numeral/Greek Letter
+ * 26 : Box Drawings
+ * 27 : Unit Symbols
+ * 28 : Circled/Parenthesized Letter
+ * 29 : Hiragana/Katakana
+ * 30 : Cyrillic Letter
+ */
+
+ if (c1 >= 0xB0 && c1 <= 0xC8)
+ // Hangul
+ return 20;
+#if defined(MSWIN) || defined(WIN32UNIX)
+ else if (c1 <= 0xA0 || c2 <= 0xA0)
+ // Extended Hangul Region : MS UHC(Unified Hangul Code)
+ // c1: 0x81-0xA0 with c2: 0x41-0x5A, 0x61-0x7A, 0x81-0xFE
+ // c1: 0xA1-0xC6 with c2: 0x41-0x5A, 0x61-0x7A, 0x81-0xA0
+ return 20;
+#endif
+
+ else if (c1 >= 0xCA && c1 <= 0xFD)
+ // Hanja
+ return 21;
+ else switch (c1)
+ {
+ case 0xA1:
+ case 0xA2:
+ // Symbols
+ return 22;
+ case 0xA3:
+ // Alphanumeric
+ return 23;
+ case 0xA4:
+ // Hangul Letter(Alphabet)
+ return 24;
+ case 0xA5:
+ // Roman Numeral/Greek Letter
+ return 25;
+ case 0xA6:
+ // Box Drawings
+ return 26;
+ case 0xA7:
+ // Unit Symbols
+ return 27;
+ case 0xA8:
+ case 0xA9:
+ if (c2 <= 0xAF)
+ return 25; // Roman Letter
+ else if (c2 >= 0xF6)
+ return 22; // Symbols
+ else
+ // Circled/Parenthesized Letter
+ return 28;
+ case 0xAA:
+ case 0xAB:
+ // Hiragana/Katakana
+ return 29;
+ case 0xAC:
+ // Cyrillic Letter
+ return 30;
+ }
+ }
+ default:
+ break;
+ }
+ return 3;
+}
+
+/*
+ * mb_char2len() function pointer.
+ * Return length in bytes of character "c".
+ * Returns 1 for a single-byte character.
+ */
+ int
+latin_char2len(int c UNUSED)
+{
+ return 1;
+}
+
+ static int
+dbcs_char2len(
+ int c)
+{
+ if (c >= 0x100)
+ return 2;
+ return 1;
+}
+
+/*
+ * mb_char2bytes() function pointer.
+ * Convert a character to its bytes.
+ * Returns the length in bytes.
+ */
+ int
+latin_char2bytes(int c, char_u *buf)
+{
+ buf[0] = c;
+ return 1;
+}
+
+ static int
+dbcs_char2bytes(int c, char_u *buf)
+{
+ if (c >= 0x100)
+ {
+ buf[0] = (unsigned)c >> 8;
+ buf[1] = c;
+ // Never use a NUL byte, it causes lots of trouble. It's an invalid
+ // character anyway.
+ if (buf[1] == NUL)
+ buf[1] = '\n';
+ return 2;
+ }
+ buf[0] = c;
+ return 1;
+}
+
+/*
+ * Get byte length of character at "*p". Returns zero when "*p" is NUL.
+ * Used for mb_ptr2len() when 'encoding' latin.
+ */
+ int
+latin_ptr2len(char_u *p)
+{
+ return *p == NUL ? 0 : 1;
+}
+
+/*
+ * Get byte length of character at "*p". Returns zero when "*p" is NUL.
+ * Used for mb_ptr2len() when 'encoding' DBCS.
+ */
+ static int
+dbcs_ptr2len(char_u *p)
+{
+ int len;
+
+ if (*p == NUL)
+ return 0;
+
+ // if the second byte is missing the length is 1
+ len = MB_BYTE2LEN(*p);
+ if (len == 2 && p[1] == NUL)
+ len = 1;
+ return len;
+}
+
+/*
+ * mb_ptr2len_len() function pointer.
+ * Like mb_ptr2len(), but limit to read "size" bytes.
+ * Returns 0 for an empty string.
+ * Returns 1 for an illegal char or an incomplete byte sequence.
+ */
+ int
+latin_ptr2len_len(char_u *p, int size)
+{
+ if (size < 1 || *p == NUL)
+ return 0;
+ return 1;
+}
+
+ static int
+dbcs_ptr2len_len(char_u *p, int size)
+{
+ int len;
+
+ if (size < 1 || *p == NUL)
+ return 0;
+ if (size == 1)
+ return 1;
+ // Check that second byte is not missing.
+ len = MB_BYTE2LEN(*p);
+ if (len == 2 && p[1] == NUL)
+ len = 1;
+ return len;
+}
+
+struct interval
+{
+ long first;
+ long last;
+};
+
+/*
+ * Return TRUE if "c" is in "table[size / sizeof(struct interval)]".
+ */
+ static int
+intable(struct interval *table, size_t size, int c)
+{
+ int mid, bot, top;
+
+ // first quick check for Latin1 etc. characters
+ if (c < table[0].first)
+ return FALSE;
+
+ // binary search in table
+ bot = 0;
+ top = (int)(size / sizeof(struct interval) - 1);
+ while (top >= bot)
+ {
+ mid = (bot + top) / 2;
+ if (table[mid].last < c)
+ bot = mid + 1;
+ else if (table[mid].first > c)
+ top = mid - 1;
+ else
+ return TRUE;
+ }
+ return FALSE;
+}
+
+// Sorted list of non-overlapping intervals of East Asian Ambiguous
+// characters, generated with ../runtime/tools/unicode.vim.
+static struct interval ambiguous[] =
+{
+ {0x00a1, 0x00a1},
+ {0x00a4, 0x00a4},
+ {0x00a7, 0x00a8},
+ {0x00aa, 0x00aa},
+ {0x00ad, 0x00ae},
+ {0x00b0, 0x00b4},
+ {0x00b6, 0x00ba},
+ {0x00bc, 0x00bf},
+ {0x00c6, 0x00c6},
+ {0x00d0, 0x00d0},
+ {0x00d7, 0x00d8},
+ {0x00de, 0x00e1},
+ {0x00e6, 0x00e6},
+ {0x00e8, 0x00ea},
+ {0x00ec, 0x00ed},
+ {0x00f0, 0x00f0},
+ {0x00f2, 0x00f3},
+ {0x00f7, 0x00fa},
+ {0x00fc, 0x00fc},
+ {0x00fe, 0x00fe},
+ {0x0101, 0x0101},
+ {0x0111, 0x0111},
+ {0x0113, 0x0113},
+ {0x011b, 0x011b},
+ {0x0126, 0x0127},
+ {0x012b, 0x012b},
+ {0x0131, 0x0133},
+ {0x0138, 0x0138},
+ {0x013f, 0x0142},
+ {0x0144, 0x0144},
+ {0x0148, 0x014b},
+ {0x014d, 0x014d},
+ {0x0152, 0x0153},
+ {0x0166, 0x0167},
+ {0x016b, 0x016b},
+ {0x01ce, 0x01ce},
+ {0x01d0, 0x01d0},
+ {0x01d2, 0x01d2},
+ {0x01d4, 0x01d4},
+ {0x01d6, 0x01d6},
+ {0x01d8, 0x01d8},
+ {0x01da, 0x01da},
+ {0x01dc, 0x01dc},
+ {0x0251, 0x0251},
+ {0x0261, 0x0261},
+ {0x02c4, 0x02c4},
+ {0x02c7, 0x02c7},
+ {0x02c9, 0x02cb},
+ {0x02cd, 0x02cd},
+ {0x02d0, 0x02d0},
+ {0x02d8, 0x02db},
+ {0x02dd, 0x02dd},
+ {0x02df, 0x02df},
+ {0x0300, 0x036f},
+ {0x0391, 0x03a1},
+ {0x03a3, 0x03a9},
+ {0x03b1, 0x03c1},
+ {0x03c3, 0x03c9},
+ {0x0401, 0x0401},
+ {0x0410, 0x044f},
+ {0x0451, 0x0451},
+ {0x2010, 0x2010},
+ {0x2013, 0x2016},
+ {0x2018, 0x2019},
+ {0x201c, 0x201d},
+ {0x2020, 0x2022},
+ {0x2024, 0x2027},
+ {0x2030, 0x2030},
+ {0x2032, 0x2033},
+ {0x2035, 0x2035},
+ {0x203b, 0x203b},
+ {0x203e, 0x203e},
+ {0x2074, 0x2074},
+ {0x207f, 0x207f},
+ {0x2081, 0x2084},
+ {0x20ac, 0x20ac},
+ {0x2103, 0x2103},
+ {0x2105, 0x2105},
+ {0x2109, 0x2109},
+ {0x2113, 0x2113},
+ {0x2116, 0x2116},
+ {0x2121, 0x2122},
+ {0x2126, 0x2126},
+ {0x212b, 0x212b},
+ {0x2153, 0x2154},
+ {0x215b, 0x215e},
+ {0x2160, 0x216b},
+ {0x2170, 0x2179},
+ {0x2189, 0x2189},
+ {0x2190, 0x2199},
+ {0x21b8, 0x21b9},
+ {0x21d2, 0x21d2},
+ {0x21d4, 0x21d4},
+ {0x21e7, 0x21e7},
+ {0x2200, 0x2200},
+ {0x2202, 0x2203},
+ {0x2207, 0x2208},
+ {0x220b, 0x220b},
+ {0x220f, 0x220f},
+ {0x2211, 0x2211},
+ {0x2215, 0x2215},
+ {0x221a, 0x221a},
+ {0x221d, 0x2220},
+ {0x2223, 0x2223},
+ {0x2225, 0x2225},
+ {0x2227, 0x222c},
+ {0x222e, 0x222e},
+ {0x2234, 0x2237},
+ {0x223c, 0x223d},
+ {0x2248, 0x2248},
+ {0x224c, 0x224c},
+ {0x2252, 0x2252},
+ {0x2260, 0x2261},
+ {0x2264, 0x2267},
+ {0x226a, 0x226b},
+ {0x226e, 0x226f},
+ {0x2282, 0x2283},
+ {0x2286, 0x2287},
+ {0x2295, 0x2295},
+ {0x2299, 0x2299},
+ {0x22a5, 0x22a5},
+ {0x22bf, 0x22bf},
+ {0x2312, 0x2312},
+ {0x2460, 0x24e9},
+ {0x24eb, 0x254b},
+ {0x2550, 0x2573},
+ {0x2580, 0x258f},
+ {0x2592, 0x2595},
+ {0x25a0, 0x25a1},
+ {0x25a3, 0x25a9},
+ {0x25b2, 0x25b3},
+ {0x25b6, 0x25b7},
+ {0x25bc, 0x25bd},
+ {0x25c0, 0x25c1},
+ {0x25c6, 0x25c8},
+ {0x25cb, 0x25cb},
+ {0x25ce, 0x25d1},
+ {0x25e2, 0x25e5},
+ {0x25ef, 0x25ef},
+ {0x2605, 0x2606},
+ {0x2609, 0x2609},
+ {0x260e, 0x260f},
+ {0x261c, 0x261c},
+ {0x261e, 0x261e},
+ {0x2640, 0x2640},
+ {0x2642, 0x2642},
+ {0x2660, 0x2661},
+ {0x2663, 0x2665},
+ {0x2667, 0x266a},
+ {0x266c, 0x266d},
+ {0x266f, 0x266f},
+ {0x269e, 0x269f},
+ {0x26bf, 0x26bf},
+ {0x26c6, 0x26cd},
+ {0x26cf, 0x26d3},
+ {0x26d5, 0x26e1},
+ {0x26e3, 0x26e3},
+ {0x26e8, 0x26e9},
+ {0x26eb, 0x26f1},
+ {0x26f4, 0x26f4},
+ {0x26f6, 0x26f9},
+ {0x26fb, 0x26fc},
+ {0x26fe, 0x26ff},
+ {0x273d, 0x273d},
+ {0x2776, 0x277f},
+ {0x2b56, 0x2b59},
+ {0x3248, 0x324f},
+ {0xe000, 0xf8ff},
+ {0xfe00, 0xfe0f},
+ {0xfffd, 0xfffd},
+ {0x1f100, 0x1f10a},
+ {0x1f110, 0x1f12d},
+ {0x1f130, 0x1f169},
+ {0x1f170, 0x1f18d},
+ {0x1f18f, 0x1f190},
+ {0x1f19b, 0x1f1ac},
+ {0xe0100, 0xe01ef},
+ {0xf0000, 0xffffd},
+ {0x100000, 0x10fffd}
+};
+
+#if defined(FEAT_TERMINAL) || defined(PROTO)
+/*
+ * utf_char2cells() with different argument type for libvterm.
+ */
+ int
+utf_uint2cells(UINT32_T c)
+{
+ if (c >= 0x100 && utf_iscomposing((int)c))
+ return 0;
+ return utf_char2cells((int)c);
+}
+#endif
+
+/*
+ * For UTF-8 character "c" return 2 for a double-width character, 1 for others.
+ * Returns 4 or 6 for an unprintable character.
+ * Is only correct for characters >= 0x80.
+ * When p_ambw is "double", return 2 for a character with East Asian Width
+ * class 'A'(mbiguous).
+ */
+ int
+utf_char2cells(int c)
+{
+ // Sorted list of non-overlapping intervals of East Asian double width
+ // characters, generated with ../runtime/tools/unicode.vim.
+ static struct interval doublewidth[] =
+ {
+ {0x1100, 0x115f},
+ {0x231a, 0x231b},
+ {0x2329, 0x232a},
+ {0x23e9, 0x23ec},
+ {0x23f0, 0x23f0},
+ {0x23f3, 0x23f3},
+ {0x25fd, 0x25fe},
+ {0x2614, 0x2615},
+ {0x2648, 0x2653},
+ {0x267f, 0x267f},
+ {0x2693, 0x2693},
+ {0x26a1, 0x26a1},
+ {0x26aa, 0x26ab},
+ {0x26bd, 0x26be},
+ {0x26c4, 0x26c5},
+ {0x26ce, 0x26ce},
+ {0x26d4, 0x26d4},
+ {0x26ea, 0x26ea},
+ {0x26f2, 0x26f3},
+ {0x26f5, 0x26f5},
+ {0x26fa, 0x26fa},
+ {0x26fd, 0x26fd},
+ {0x2705, 0x2705},
+ {0x270a, 0x270b},
+ {0x2728, 0x2728},
+ {0x274c, 0x274c},
+ {0x274e, 0x274e},
+ {0x2753, 0x2755},
+ {0x2757, 0x2757},
+ {0x2795, 0x2797},
+ {0x27b0, 0x27b0},
+ {0x27bf, 0x27bf},
+ {0x2b1b, 0x2b1c},
+ {0x2b50, 0x2b50},
+ {0x2b55, 0x2b55},
+ {0x2e80, 0x2e99},
+ {0x2e9b, 0x2ef3},
+ {0x2f00, 0x2fd5},
+ {0x2ff0, 0x2ffb},
+ {0x3000, 0x303e},
+ {0x3041, 0x3096},
+ {0x3099, 0x30ff},
+ {0x3105, 0x312f},
+ {0x3131, 0x318e},
+ {0x3190, 0x31e3},
+ {0x31f0, 0x321e},
+ {0x3220, 0x3247},
+ {0x3250, 0x4dbf},
+ {0x4e00, 0xa48c},
+ {0xa490, 0xa4c6},
+ {0xa960, 0xa97c},
+ {0xac00, 0xd7a3},
+ {0xf900, 0xfaff},
+ {0xfe10, 0xfe19},
+ {0xfe30, 0xfe52},
+ {0xfe54, 0xfe66},
+ {0xfe68, 0xfe6b},
+ {0xff01, 0xff60},
+ {0xffe0, 0xffe6},
+ {0x16fe0, 0x16fe3},
+ {0x16ff0, 0x16ff1},
+ {0x17000, 0x187f7},
+ {0x18800, 0x18cd5},
+ {0x18d00, 0x18d08},
+ {0x1aff0, 0x1aff3},
+ {0x1aff5, 0x1affb},
+ {0x1affd, 0x1affe},
+ {0x1b000, 0x1b122},
+ {0x1b132, 0x1b132},
+ {0x1b150, 0x1b152},
+ {0x1b155, 0x1b155},
+ {0x1b164, 0x1b167},
+ {0x1b170, 0x1b2fb},
+ {0x1f004, 0x1f004},
+ {0x1f0cf, 0x1f0cf},
+ {0x1f18e, 0x1f18e},
+ {0x1f191, 0x1f19a},
+ {0x1f200, 0x1f202},
+ {0x1f210, 0x1f23b},
+ {0x1f240, 0x1f248},
+ {0x1f250, 0x1f251},
+ {0x1f260, 0x1f265},
+ {0x1f300, 0x1f320},
+ {0x1f32d, 0x1f335},
+ {0x1f337, 0x1f37c},
+ {0x1f37e, 0x1f393},
+ {0x1f3a0, 0x1f3ca},
+ {0x1f3cf, 0x1f3d3},
+ {0x1f3e0, 0x1f3f0},
+ {0x1f3f4, 0x1f3f4},
+ {0x1f3f8, 0x1f43e},
+ {0x1f440, 0x1f440},
+ {0x1f442, 0x1f4fc},
+ {0x1f4ff, 0x1f53d},
+ {0x1f54b, 0x1f54e},
+ {0x1f550, 0x1f567},
+ {0x1f57a, 0x1f57a},
+ {0x1f595, 0x1f596},
+ {0x1f5a4, 0x1f5a4},
+ {0x1f5fb, 0x1f64f},
+ {0x1f680, 0x1f6c5},
+ {0x1f6cc, 0x1f6cc},
+ {0x1f6d0, 0x1f6d2},
+ {0x1f6d5, 0x1f6d7},
+ {0x1f6dc, 0x1f6df},
+ {0x1f6eb, 0x1f6ec},
+ {0x1f6f4, 0x1f6fc},
+ {0x1f7e0, 0x1f7eb},
+ {0x1f7f0, 0x1f7f0},
+ {0x1f90c, 0x1f93a},
+ {0x1f93c, 0x1f945},
+ {0x1f947, 0x1f9ff},
+ {0x1fa70, 0x1fa7c},
+ {0x1fa80, 0x1fa88},
+ {0x1fa90, 0x1fabd},
+ {0x1fabf, 0x1fac5},
+ {0x1face, 0x1fadb},
+ {0x1fae0, 0x1fae8},
+ {0x1faf0, 0x1faf8},
+ {0x20000, 0x2fffd},
+ {0x30000, 0x3fffd}
+ };
+
+ // Sorted list of non-overlapping intervals of Emoji characters that don't
+ // have ambiguous or double width,
+ // based on http://unicode.org/emoji/charts/emoji-list.html
+ static struct interval emoji_wide[] =
+ {
+ {0x23ed, 0x23ef},
+ {0x23f1, 0x23f2},
+ {0x23f8, 0x23fa},
+ {0x24c2, 0x24c2},
+ {0x261d, 0x261d},
+ {0x26c8, 0x26c8},
+ {0x26cf, 0x26cf},
+ {0x26d1, 0x26d1},
+ {0x26d3, 0x26d3},
+ {0x26e9, 0x26e9},
+ {0x26f0, 0x26f1},
+ {0x26f7, 0x26f9},
+ {0x270c, 0x270d},
+ {0x2934, 0x2935},
+ {0x1f170, 0x1f189},
+ {0x1f1e6, 0x1f1ff},
+ {0x1f321, 0x1f321},
+ {0x1f324, 0x1f32c},
+ {0x1f336, 0x1f336},
+ {0x1f37d, 0x1f37d},
+ {0x1f396, 0x1f397},
+ {0x1f399, 0x1f39b},
+ {0x1f39e, 0x1f39f},
+ {0x1f3cb, 0x1f3ce},
+ {0x1f3d4, 0x1f3df},
+ {0x1f3f3, 0x1f3f5},
+ {0x1f3f7, 0x1f3f7},
+ {0x1f43f, 0x1f43f},
+ {0x1f441, 0x1f441},
+ {0x1f4fd, 0x1f4fd},
+ {0x1f549, 0x1f54a},
+ {0x1f56f, 0x1f570},
+ {0x1f573, 0x1f579},
+ {0x1f587, 0x1f587},
+ {0x1f58a, 0x1f58d},
+ {0x1f590, 0x1f590},
+ {0x1f5a5, 0x1f5a5},
+ {0x1f5a8, 0x1f5a8},
+ {0x1f5b1, 0x1f5b2},
+ {0x1f5bc, 0x1f5bc},
+ {0x1f5c2, 0x1f5c4},
+ {0x1f5d1, 0x1f5d3},
+ {0x1f5dc, 0x1f5de},
+ {0x1f5e1, 0x1f5e1},
+ {0x1f5e3, 0x1f5e3},
+ {0x1f5e8, 0x1f5e8},
+ {0x1f5ef, 0x1f5ef},
+ {0x1f5f3, 0x1f5f3},
+ {0x1f5fa, 0x1f5fa},
+ {0x1f6cb, 0x1f6cf},
+ {0x1f6e0, 0x1f6e5},
+ {0x1f6e9, 0x1f6e9},
+ {0x1f6f0, 0x1f6f0},
+ {0x1f6f3, 0x1f6f3}
+
+#ifdef MACOS_X
+ // Include SF Symbols 4 characters, which should be rendered as
+ // double-width. SF Symbols is an Apple-specific set of symbols and
+ // icons for use in Apple operating systems. They are included as
+ // glyphs as part of the default San Francisco fonts shipped with
+ // macOS. The current version is SF Symbols 4.
+ //
+ // These Apple-specific glyphs are not part of standard Unicode, and
+ // all of them are in the Supplementary Private Use Area-B range. The
+ // exact range was determined by downloading the 'SF Symbols 4' app
+ // from Apple (https://developer.apple.com/sf-symbols/), and then
+ // selecting all symbols, copying them out, and inspecting the unicode
+ // values of them.
+ //
+ // Note that these symbols are of varying widths, as they are symbols
+ // representing differents things ranging from a simple gear icon to an
+ // airplane. Some of them are in fact wider than double-width, but Vim
+ // doesn't support non-fixed-width font, and tagging them as
+ // double-width is the best way to handle them.
+ //
+ // Also see https://en.wikipedia.org/wiki/San_Francisco_(sans-serif_typeface)#SF_Symbols
+ , {0x100000, 0x1018c7}
+#endif
+ };
+
+#ifdef FEAT_EVAL
+ // Use the value from setcellwidths() at 0x80 and higher, unless the
+ // character is not printable.
+ if (c >= 0x80 &&
+# ifdef USE_WCHAR_FUNCTIONS
+ wcwidth(c) >= 1 &&
+# endif
+ vim_isprintc(c))
+ {
+ int n = cw_value(c);
+ if (n != 0)
+ return n;
+ }
+#endif
+
+ if (c >= 0x100)
+ {
+#ifdef USE_WCHAR_FUNCTIONS
+ int n;
+
+ /*
+ * Assume the library function wcwidth() works better than our own
+ * stuff. It should return 1 for ambiguous width chars!
+ */
+ n = wcwidth(c);
+
+ if (n < 0)
+ return 6; // unprintable, displays <xxxx>
+ if (n > 1)
+ return n;
+#else
+ if (!utf_printable(c))
+ return 6; // unprintable, displays <xxxx>
+ if (intable(doublewidth, sizeof(doublewidth), c))
+ return 2;
+#endif
+ if (p_emoji && intable(emoji_wide, sizeof(emoji_wide), c))
+ return 2;
+ }
+
+ // Characters below 0x100 are influenced by 'isprint' option
+ else if (c >= 0x80 && !vim_isprintc(c))
+ return 4; // unprintable, displays <xx>
+
+ if (c >= 0x80 && *p_ambw == 'd' && intable(ambiguous, sizeof(ambiguous), c))
+ return 2;
+
+ return 1;
+}
+
+/*
+ * mb_ptr2cells() function pointer.
+ * Return the number of display cells character at "*p" occupies.
+ * This doesn't take care of unprintable characters, use ptr2cells() for that.
+ */
+ int
+latin_ptr2cells(char_u *p UNUSED)
+{
+ return 1;
+}
+
+ int
+utf_ptr2cells(
+ char_u *p)
+{
+ int c;
+
+ // Need to convert to a character number.
+ if (*p >= 0x80)
+ {
+ c = utf_ptr2char(p);
+ // An illegal byte is displayed as <xx>.
+ if (utf_ptr2len(p) == 1 || c == NUL)
+ return 4;
+ // If the char is ASCII it must be an overlong sequence.
+ if (c < 0x80)
+ return char2cells(c);
+ return utf_char2cells(c);
+ }
+ return 1;
+}
+
+ int
+dbcs_ptr2cells(char_u *p)
+{
+ // Number of cells is equal to number of bytes, except for euc-jp when
+ // the first byte is 0x8e.
+ if (enc_dbcs == DBCS_JPNU && *p == 0x8e)
+ return 1;
+ return MB_BYTE2LEN(*p);
+}
+
+/*
+ * mb_ptr2cells_len() function pointer.
+ * Like mb_ptr2cells(), but limit string length to "size".
+ * For an empty string or truncated character returns 1.
+ */
+ int
+latin_ptr2cells_len(char_u *p UNUSED, int size UNUSED)
+{
+ return 1;
+}
+
+ static int
+utf_ptr2cells_len(char_u *p, int size)
+{
+ int c;
+
+ // Need to convert to a wide character.
+ if (size > 0 && *p >= 0x80)
+ {
+ if (utf_ptr2len_len(p, size) < utf8len_tab[*p])
+ return 1; // truncated
+ c = utf_ptr2char(p);
+ // An illegal byte is displayed as <xx>.
+ if (utf_ptr2len(p) == 1 || c == NUL)
+ return 4;
+ // If the char is ASCII it must be an overlong sequence.
+ if (c < 0x80)
+ return char2cells(c);
+ return utf_char2cells(c);
+ }
+ return 1;
+}
+
+ static int
+dbcs_ptr2cells_len(char_u *p, int size)
+{
+ // Number of cells is equal to number of bytes, except for euc-jp when
+ // the first byte is 0x8e.
+ if (size <= 1 || (enc_dbcs == DBCS_JPNU && *p == 0x8e))
+ return 1;
+ return MB_BYTE2LEN(*p);
+}
+
+/*
+ * mb_char2cells() function pointer.
+ * Return the number of display cells character "c" occupies.
+ * Only takes care of multi-byte chars, not "^C" and such.
+ */
+ int
+latin_char2cells(int c UNUSED)
+{
+ return 1;
+}
+
+ static int
+dbcs_char2cells(int c)
+{
+ // Number of cells is equal to number of bytes, except for euc-jp when
+ // the first byte is 0x8e.
+ if (enc_dbcs == DBCS_JPNU && ((unsigned)c >> 8) == 0x8e)
+ return 1;
+ // use the first byte
+ return MB_BYTE2LEN((unsigned)c >> 8);
+}
+
+/*
+ * Return the number of cells occupied by string "p".
+ * Stop at a NUL character. When "len" >= 0 stop at character "p[len]".
+ */
+ int
+mb_string2cells(char_u *p, int len)
+{
+ int i;
+ int clen = 0;
+
+ for (i = 0; (len < 0 || i < len) && p[i] != NUL; i += (*mb_ptr2len)(p + i))
+ clen += (*mb_ptr2cells)(p + i);
+ return clen;
+}
+
+/*
+ * mb_off2cells() function pointer.
+ * Return number of display cells for char at ScreenLines[off].
+ * We make sure that the offset used is less than "max_off".
+ */
+ int
+latin_off2cells(unsigned off UNUSED, unsigned max_off UNUSED)
+{
+ return 1;
+}
+
+ int
+dbcs_off2cells(unsigned off, unsigned max_off)
+{
+ // never check beyond end of the line
+ if (off >= max_off)
+ return 1;
+
+ // Number of cells is equal to number of bytes, except for euc-jp when
+ // the first byte is 0x8e.
+ if (enc_dbcs == DBCS_JPNU && ScreenLines[off] == 0x8e)
+ return 1;
+ return MB_BYTE2LEN(ScreenLines[off]);
+}
+
+ int
+utf_off2cells(unsigned off, unsigned max_off)
+{
+ return (off + 1 < max_off && ScreenLines[off + 1] == 0) ? 2 : 1;
+}
+
+/*
+ * mb_ptr2char() function pointer.
+ * Convert a byte sequence into a character.
+ */
+ int
+latin_ptr2char(char_u *p)
+{
+ return *p;
+}
+
+ static int
+dbcs_ptr2char(char_u *p)
+{
+ if (MB_BYTE2LEN(*p) > 1 && p[1] != NUL)
+ return (p[0] << 8) + p[1];
+ return *p;
+}
+
+/*
+ * Convert a UTF-8 byte sequence to a character number.
+ * If the sequence is illegal or truncated by a NUL the first byte is
+ * returned.
+ * For an overlong sequence this may return zero.
+ * Does not include composing characters, of course.
+ */
+ int
+utf_ptr2char(char_u *p)
+{
+ int len;
+
+ if (p[0] < 0x80) // be quick for ASCII
+ return p[0];
+
+ len = utf8len_tab_zero[p[0]];
+ if (len > 1 && (p[1] & 0xc0) == 0x80)
+ {
+ if (len == 2)
+ return ((p[0] & 0x1f) << 6) + (p[1] & 0x3f);
+ if ((p[2] & 0xc0) == 0x80)
+ {
+ if (len == 3)
+ return ((p[0] & 0x0f) << 12) + ((p[1] & 0x3f) << 6)
+ + (p[2] & 0x3f);
+ if ((p[3] & 0xc0) == 0x80)
+ {
+ if (len == 4)
+ return ((p[0] & 0x07) << 18) + ((p[1] & 0x3f) << 12)
+ + ((p[2] & 0x3f) << 6) + (p[3] & 0x3f);
+ if ((p[4] & 0xc0) == 0x80)
+ {
+ if (len == 5)
+ return ((p[0] & 0x03) << 24) + ((p[1] & 0x3f) << 18)
+ + ((p[2] & 0x3f) << 12) + ((p[3] & 0x3f) << 6)
+ + (p[4] & 0x3f);
+ if ((p[5] & 0xc0) == 0x80 && len == 6)
+ return ((p[0] & 0x01) << 30) + ((p[1] & 0x3f) << 24)
+ + ((p[2] & 0x3f) << 18) + ((p[3] & 0x3f) << 12)
+ + ((p[4] & 0x3f) << 6) + (p[5] & 0x3f);
+ }
+ }
+ }
+ }
+ // Illegal value, just return the first byte
+ return p[0];
+}
+
+/*
+ * Convert a UTF-8 byte sequence to a wide character.
+ * String is assumed to be terminated by NUL or after "n" bytes, whichever
+ * comes first.
+ * The function is safe in the sense that it never accesses memory beyond the
+ * first "n" bytes of "s".
+ *
+ * On success, returns decoded codepoint, advances "s" to the beginning of
+ * next character and decreases "n" accordingly.
+ *
+ * If end of string was reached, returns 0 and, if "n" > 0, advances "s" past
+ * NUL byte.
+ *
+ * If byte sequence is illegal or incomplete, returns -1 and does not advance
+ * "s".
+ */
+ static int
+utf_safe_read_char_adv(char_u **s, size_t *n)
+{
+ int c, k;
+
+ if (*n == 0) // end of buffer
+ return 0;
+
+ k = utf8len_tab_zero[**s];
+
+ if (k == 1)
+ {
+ // ASCII character or NUL
+ (*n)--;
+ return *(*s)++;
+ }
+
+ if ((size_t)k <= *n)
+ {
+ // We have a multibyte sequence and it isn't truncated by buffer
+ // limits so utf_ptr2char() is safe to use. Or the first byte is
+ // illegal (k=0), and it's also safe to use utf_ptr2char().
+ c = utf_ptr2char(*s);
+
+ // On failure, utf_ptr2char() returns the first byte, so here we
+ // check equality with the first byte. The only non-ASCII character
+ // which equals the first byte of its own UTF-8 representation is
+ // U+00C3 (UTF-8: 0xC3 0x83), so need to check that special case too.
+ // It's safe even if n=1, else we would have k=2 > n.
+ if (c != (int)(**s) || (c == 0xC3 && (*s)[1] == 0x83))
+ {
+ // byte sequence was successfully decoded
+ *s += k;
+ *n -= k;
+ return c;
+ }
+ }
+
+ // byte sequence is incomplete or illegal
+ return -1;
+}
+
+/*
+ * Get character at **pp and advance *pp to the next character.
+ * Note: composing characters are skipped!
+ */
+ int
+mb_ptr2char_adv(char_u **pp)
+{
+ int c;
+
+ c = (*mb_ptr2char)(*pp);
+ *pp += (*mb_ptr2len)(*pp);
+ return c;
+}
+
+/*
+ * Get character at **pp and advance *pp to the next character.
+ * Note: composing characters are returned as separate characters.
+ */
+ int
+mb_cptr2char_adv(char_u **pp)
+{
+ int c;
+
+ c = (*mb_ptr2char)(*pp);
+ if (enc_utf8)
+ *pp += utf_ptr2len(*pp);
+ else
+ *pp += (*mb_ptr2len)(*pp);
+ return c;
+}
+
+#if defined(FEAT_ARABIC) || defined(PROTO)
+/*
+ * Check if the character pointed to by "p2" is a composing character when it
+ * comes after "p1". For Arabic sometimes "ab" is replaced with "c", which
+ * behaves like a composing character.
+ */
+ int
+utf_composinglike(char_u *p1, char_u *p2)
+{
+ int c2;
+
+ c2 = utf_ptr2char(p2);
+ if (utf_iscomposing(c2))
+ return TRUE;
+ if (!arabic_maycombine(c2))
+ return FALSE;
+ return arabic_combine(utf_ptr2char(p1), c2);
+}
+#endif
+
+/*
+ * Convert a UTF-8 byte string to a wide character. Also get up to MAX_MCO
+ * composing characters.
+ */
+ int
+utfc_ptr2char(
+ char_u *p,
+ int *pcc) // return: composing chars, last one is 0
+{
+ int len;
+ int c;
+ int cc;
+ int i = 0;
+
+ c = utf_ptr2char(p);
+ len = utf_ptr2len(p);
+
+ // Only accept a composing char when the first char isn't illegal.
+ if ((len > 1 || *p < 0x80)
+ && p[len] >= 0x80
+ && UTF_COMPOSINGLIKE(p, p + len))
+ {
+ cc = utf_ptr2char(p + len);
+ for (;;)
+ {
+ pcc[i++] = cc;
+ if (i == MAX_MCO)
+ break;
+ len += utf_ptr2len(p + len);
+ if (p[len] < 0x80 || !utf_iscomposing(cc = utf_ptr2char(p + len)))
+ break;
+ }
+ }
+
+ if (i < MAX_MCO) // last composing char must be 0
+ pcc[i] = 0;
+
+ return c;
+}
+
+/*
+ * Convert a UTF-8 byte string to a wide character. Also get up to MAX_MCO
+ * composing characters. Use no more than p[maxlen].
+ */
+ int
+utfc_ptr2char_len(
+ char_u *p,
+ int *pcc, // return: composing chars, last one is 0
+ int maxlen)
+{
+ int len;
+ int c;
+ int cc;
+ int i = 0;
+
+ c = utf_ptr2char(p);
+ len = utf_ptr2len_len(p, maxlen);
+ // Only accept a composing char when the first char isn't illegal.
+ if ((len > 1 || *p < 0x80)
+ && len < maxlen
+ && p[len] >= 0x80
+ && UTF_COMPOSINGLIKE(p, p + len))
+ {
+ cc = utf_ptr2char(p + len);
+ for (;;)
+ {
+ pcc[i++] = cc;
+ if (i == MAX_MCO)
+ break;
+ len += utf_ptr2len_len(p + len, maxlen - len);
+ if (len >= maxlen
+ || p[len] < 0x80
+ || !utf_iscomposing(cc = utf_ptr2char(p + len)))
+ break;
+ }
+ }
+
+ if (i < MAX_MCO) // last composing char must be 0
+ pcc[i] = 0;
+
+ return c;
+}
+
+/*
+ * Convert the character at screen position "off" to a sequence of bytes.
+ * Includes the composing characters.
+ * "buf" must at least have the length MB_MAXBYTES + 1.
+ * Only to be used when ScreenLinesUC[off] != 0.
+ * Returns the produced number of bytes.
+ */
+ int
+utfc_char2bytes(int off, char_u *buf)
+{
+ int len;
+ int i;
+
+ len = utf_char2bytes(ScreenLinesUC[off], buf);
+ for (i = 0; i < Screen_mco; ++i)
+ {
+ if (ScreenLinesC[i][off] == 0)
+ break;
+ len += utf_char2bytes(ScreenLinesC[i][off], buf + len);
+ }
+ return len;
+}
+
+/*
+ * Get the length of a UTF-8 byte sequence, not including any following
+ * composing characters.
+ * Returns 0 for "".
+ * Returns 1 for an illegal byte sequence.
+ */
+ int
+utf_ptr2len(char_u *p)
+{
+ int len;
+ int i;
+
+ if (*p == NUL)
+ return 0;
+ len = utf8len_tab[*p];
+ for (i = 1; i < len; ++i)
+ if ((p[i] & 0xc0) != 0x80)
+ return 1;
+ return len;
+}
+
+/*
+ * Return length of UTF-8 character, obtained from the first byte.
+ * "b" must be between 0 and 255!
+ * Returns 1 for an invalid first byte value.
+ */
+ int
+utf_byte2len(int b)
+{
+ return utf8len_tab[b];
+}
+
+/*
+ * Get the length of UTF-8 byte sequence "p[size]". Does not include any
+ * following composing characters.
+ * Returns 1 for "".
+ * Returns 1 for an illegal byte sequence (also in incomplete byte seq.).
+ * Returns number > "size" for an incomplete byte sequence.
+ * Never returns zero.
+ */
+ int
+utf_ptr2len_len(char_u *p, int size)
+{
+ int len;
+ int i;
+ int m;
+
+ len = utf8len_tab[*p];
+ if (len == 1)
+ return 1; // NUL, ascii or illegal lead byte
+ if (len > size)
+ m = size; // incomplete byte sequence.
+ else
+ m = len;
+ for (i = 1; i < m; ++i)
+ if ((p[i] & 0xc0) != 0x80)
+ return 1;
+ return len;
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of the character at "p" takes.
+ * This includes following composing characters.
+ * Returns zero for NUL.
+ */
+ int
+utfc_ptr2len(char_u *p)
+{
+ int len;
+ int b0 = *p;
+#ifdef FEAT_ARABIC
+ int prevlen;
+#endif
+
+ if (b0 == NUL)
+ return 0;
+ if (b0 < 0x80 && p[1] < 0x80) // be quick for ASCII
+ return 1;
+
+ // Skip over first UTF-8 char, stopping at a NUL byte.
+ len = utf_ptr2len(p);
+
+ // Check for illegal byte.
+ if (len == 1 && b0 >= 0x80)
+ return 1;
+
+ /*
+ * Check for composing characters. We can handle only the first six, but
+ * skip all of them (otherwise the cursor would get stuck).
+ */
+#ifdef FEAT_ARABIC
+ prevlen = 0;
+#endif
+ for (;;)
+ {
+ if (p[len] < 0x80 || !UTF_COMPOSINGLIKE(p + prevlen, p + len))
+ return len;
+
+ // Skip over composing char
+#ifdef FEAT_ARABIC
+ prevlen = len;
+#endif
+ len += utf_ptr2len(p + len);
+ }
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of the character at "p[size]"
+ * takes. This includes following composing characters.
+ * Returns 0 for an empty string.
+ * Returns 1 for an illegal char or an incomplete byte sequence.
+ */
+ int
+utfc_ptr2len_len(char_u *p, int size)
+{
+ int len;
+#ifdef FEAT_ARABIC
+ int prevlen;
+#endif
+
+ if (size < 1 || *p == NUL)
+ return 0;
+ if (p[0] < 0x80 && (size == 1 || p[1] < 0x80)) // be quick for ASCII
+ return 1;
+
+ // Skip over first UTF-8 char, stopping at a NUL byte.
+ len = utf_ptr2len_len(p, size);
+
+ // Check for illegal byte and incomplete byte sequence.
+ if ((len == 1 && p[0] >= 0x80) || len > size)
+ return 1;
+
+ /*
+ * Check for composing characters. We can handle only the first six, but
+ * skip all of them (otherwise the cursor would get stuck).
+ */
+#ifdef FEAT_ARABIC
+ prevlen = 0;
+#endif
+ while (len < size)
+ {
+ int len_next_char;
+
+ if (p[len] < 0x80)
+ break;
+
+ /*
+ * Next character length should not go beyond size to ensure that
+ * UTF_COMPOSINGLIKE(...) does not read beyond size.
+ */
+ len_next_char = utf_ptr2len_len(p + len, size - len);
+ if (len_next_char > size - len)
+ break;
+
+ if (!UTF_COMPOSINGLIKE(p + prevlen, p + len))
+ break;
+
+ // Skip over composing char
+#ifdef FEAT_ARABIC
+ prevlen = len;
+#endif
+ len += len_next_char;
+ }
+ return len;
+}
+
+/*
+ * Return the number of bytes the UTF-8 encoding of character "c" takes.
+ * This does not include composing characters.
+ */
+ int
+utf_char2len(int c)
+{
+ if (c < 0x80)
+ return 1;
+ if (c < 0x800)
+ return 2;
+ if (c < 0x10000)
+ return 3;
+ if (c < 0x200000)
+ return 4;
+ if (c < 0x4000000)
+ return 5;
+ return 6;
+}
+
+/*
+ * Convert Unicode character "c" to UTF-8 string in "buf[]".
+ * Returns the number of bytes.
+ */
+ int
+utf_char2bytes(int c, char_u *buf)
+{
+ if (c < 0x80) // 7 bits
+ {
+ buf[0] = c;
+ return 1;
+ }
+ if (c < 0x800) // 11 bits
+ {
+ buf[0] = 0xc0 + ((unsigned)c >> 6);
+ buf[1] = 0x80 + (c & 0x3f);
+ return 2;
+ }
+ if (c < 0x10000) // 16 bits
+ {
+ buf[0] = 0xe0 + ((unsigned)c >> 12);
+ buf[1] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[2] = 0x80 + (c & 0x3f);
+ return 3;
+ }
+ if (c < 0x200000) // 21 bits
+ {
+ buf[0] = 0xf0 + ((unsigned)c >> 18);
+ buf[1] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[3] = 0x80 + (c & 0x3f);
+ return 4;
+ }
+ if (c < 0x4000000) // 26 bits
+ {
+ buf[0] = 0xf8 + ((unsigned)c >> 24);
+ buf[1] = 0x80 + (((unsigned)c >> 18) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[3] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[4] = 0x80 + (c & 0x3f);
+ return 5;
+ }
+ // 31 bits
+ buf[0] = 0xfc + ((unsigned)c >> 30);
+ buf[1] = 0x80 + (((unsigned)c >> 24) & 0x3f);
+ buf[2] = 0x80 + (((unsigned)c >> 18) & 0x3f);
+ buf[3] = 0x80 + (((unsigned)c >> 12) & 0x3f);
+ buf[4] = 0x80 + (((unsigned)c >> 6) & 0x3f);
+ buf[5] = 0x80 + (c & 0x3f);
+ return 6;
+}
+
+#if defined(FEAT_TERMINAL) || defined(PROTO)
+/*
+ * utf_iscomposing() with different argument type for libvterm.
+ */
+ int
+utf_iscomposing_uint(UINT32_T c)
+{
+ return utf_iscomposing((int)c);
+}
+#endif
+
+/*
+ * Return TRUE if "c" is a composing UTF-8 character. This means it will be
+ * drawn on top of the preceding character.
+ * Based on code from Markus Kuhn.
+ */
+ int
+utf_iscomposing(int c)
+{
+ // Sorted list of non-overlapping intervals.
+ // Generated by ../runtime/tools/unicode.vim.
+ static struct interval combining[] =
+ {
+ {0x0300, 0x036f},
+ {0x0483, 0x0489},
+ {0x0591, 0x05bd},
+ {0x05bf, 0x05bf},
+ {0x05c1, 0x05c2},
+ {0x05c4, 0x05c5},
+ {0x05c7, 0x05c7},
+ {0x0610, 0x061a},
+ {0x064b, 0x065f},
+ {0x0670, 0x0670},
+ {0x06d6, 0x06dc},
+ {0x06df, 0x06e4},
+ {0x06e7, 0x06e8},
+ {0x06ea, 0x06ed},
+ {0x0711, 0x0711},
+ {0x0730, 0x074a},
+ {0x07a6, 0x07b0},
+ {0x07eb, 0x07f3},
+ {0x07fd, 0x07fd},
+ {0x0816, 0x0819},
+ {0x081b, 0x0823},
+ {0x0825, 0x0827},
+ {0x0829, 0x082d},
+ {0x0859, 0x085b},
+ {0x0898, 0x089f},
+ {0x08ca, 0x08e1},
+ {0x08e3, 0x0902},
+ {0x093a, 0x093a},
+ {0x093c, 0x093c},
+ {0x0941, 0x0948},
+ {0x094d, 0x094d},
+ {0x0951, 0x0957},
+ {0x0962, 0x0963},
+ {0x0981, 0x0981},
+ {0x09bc, 0x09bc},
+ {0x09c1, 0x09c4},
+ {0x09cd, 0x09cd},
+ {0x09e2, 0x09e3},
+ {0x09fe, 0x09fe},
+ {0x0a01, 0x0a02},
+ {0x0a3c, 0x0a3c},
+ {0x0a41, 0x0a42},
+ {0x0a47, 0x0a48},
+ {0x0a4b, 0x0a4d},
+ {0x0a51, 0x0a51},
+ {0x0a70, 0x0a71},
+ {0x0a75, 0x0a75},
+ {0x0a81, 0x0a82},
+ {0x0abc, 0x0abc},
+ {0x0ac1, 0x0ac5},
+ {0x0ac7, 0x0ac8},
+ {0x0acd, 0x0acd},
+ {0x0ae2, 0x0ae3},
+ {0x0afa, 0x0aff},
+ {0x0b01, 0x0b01},
+ {0x0b3c, 0x0b3c},
+ {0x0b3f, 0x0b3f},
+ {0x0b41, 0x0b44},
+ {0x0b4d, 0x0b4d},
+ {0x0b55, 0x0b56},
+ {0x0b62, 0x0b63},
+ {0x0b82, 0x0b82},
+ {0x0bc0, 0x0bc0},
+ {0x0bcd, 0x0bcd},
+ {0x0c00, 0x0c00},
+ {0x0c04, 0x0c04},
+ {0x0c3c, 0x0c3c},
+ {0x0c3e, 0x0c40},
+ {0x0c46, 0x0c48},
+ {0x0c4a, 0x0c4d},
+ {0x0c55, 0x0c56},
+ {0x0c62, 0x0c63},
+ {0x0c81, 0x0c81},
+ {0x0cbc, 0x0cbc},
+ {0x0cbf, 0x0cbf},
+ {0x0cc6, 0x0cc6},
+ {0x0ccc, 0x0ccd},
+ {0x0ce2, 0x0ce3},
+ {0x0d00, 0x0d01},
+ {0x0d3b, 0x0d3c},
+ {0x0d41, 0x0d44},
+ {0x0d4d, 0x0d4d},
+ {0x0d62, 0x0d63},
+ {0x0d81, 0x0d81},
+ {0x0dca, 0x0dca},
+ {0x0dd2, 0x0dd4},
+ {0x0dd6, 0x0dd6},
+ {0x0e31, 0x0e31},
+ {0x0e34, 0x0e3a},
+ {0x0e47, 0x0e4e},
+ {0x0eb1, 0x0eb1},
+ {0x0eb4, 0x0ebc},
+ {0x0ec8, 0x0ece},
+ {0x0f18, 0x0f19},
+ {0x0f35, 0x0f35},
+ {0x0f37, 0x0f37},
+ {0x0f39, 0x0f39},
+ {0x0f71, 0x0f7e},
+ {0x0f80, 0x0f84},
+ {0x0f86, 0x0f87},
+ {0x0f8d, 0x0f97},
+ {0x0f99, 0x0fbc},
+ {0x0fc6, 0x0fc6},
+ {0x102d, 0x1030},
+ {0x1032, 0x1037},
+ {0x1039, 0x103a},
+ {0x103d, 0x103e},
+ {0x1058, 0x1059},
+ {0x105e, 0x1060},
+ {0x1071, 0x1074},
+ {0x1082, 0x1082},
+ {0x1085, 0x1086},
+ {0x108d, 0x108d},
+ {0x109d, 0x109d},
+ {0x135d, 0x135f},
+ {0x1712, 0x1714},
+ {0x1732, 0x1733},
+ {0x1752, 0x1753},
+ {0x1772, 0x1773},
+ {0x17b4, 0x17b5},
+ {0x17b7, 0x17bd},
+ {0x17c6, 0x17c6},
+ {0x17c9, 0x17d3},
+ {0x17dd, 0x17dd},
+ {0x180b, 0x180d},
+ {0x180f, 0x180f},
+ {0x1885, 0x1886},
+ {0x18a9, 0x18a9},
+ {0x1920, 0x1922},
+ {0x1927, 0x1928},
+ {0x1932, 0x1932},
+ {0x1939, 0x193b},
+ {0x1a17, 0x1a18},
+ {0x1a1b, 0x1a1b},
+ {0x1a56, 0x1a56},
+ {0x1a58, 0x1a5e},
+ {0x1a60, 0x1a60},
+ {0x1a62, 0x1a62},
+ {0x1a65, 0x1a6c},
+ {0x1a73, 0x1a7c},
+ {0x1a7f, 0x1a7f},
+ {0x1ab0, 0x1ace},
+ {0x1b00, 0x1b03},
+ {0x1b34, 0x1b34},
+ {0x1b36, 0x1b3a},
+ {0x1b3c, 0x1b3c},
+ {0x1b42, 0x1b42},
+ {0x1b6b, 0x1b73},
+ {0x1b80, 0x1b81},
+ {0x1ba2, 0x1ba5},
+ {0x1ba8, 0x1ba9},
+ {0x1bab, 0x1bad},
+ {0x1be6, 0x1be6},
+ {0x1be8, 0x1be9},
+ {0x1bed, 0x1bed},
+ {0x1bef, 0x1bf1},
+ {0x1c2c, 0x1c33},
+ {0x1c36, 0x1c37},
+ {0x1cd0, 0x1cd2},
+ {0x1cd4, 0x1ce0},
+ {0x1ce2, 0x1ce8},
+ {0x1ced, 0x1ced},
+ {0x1cf4, 0x1cf4},
+ {0x1cf8, 0x1cf9},
+ {0x1dc0, 0x1dff},
+ {0x20d0, 0x20f0},
+ {0x2cef, 0x2cf1},
+ {0x2d7f, 0x2d7f},
+ {0x2de0, 0x2dff},
+ {0x302a, 0x302d},
+ {0x3099, 0x309a},
+ {0xa66f, 0xa672},
+ {0xa674, 0xa67d},
+ {0xa69e, 0xa69f},
+ {0xa6f0, 0xa6f1},
+ {0xa802, 0xa802},
+ {0xa806, 0xa806},
+ {0xa80b, 0xa80b},
+ {0xa825, 0xa826},
+ {0xa82c, 0xa82c},
+ {0xa8c4, 0xa8c5},
+ {0xa8e0, 0xa8f1},
+ {0xa8ff, 0xa8ff},
+ {0xa926, 0xa92d},
+ {0xa947, 0xa951},
+ {0xa980, 0xa982},
+ {0xa9b3, 0xa9b3},
+ {0xa9b6, 0xa9b9},
+ {0xa9bc, 0xa9bd},
+ {0xa9e5, 0xa9e5},
+ {0xaa29, 0xaa2e},
+ {0xaa31, 0xaa32},
+ {0xaa35, 0xaa36},
+ {0xaa43, 0xaa43},
+ {0xaa4c, 0xaa4c},
+ {0xaa7c, 0xaa7c},
+ {0xaab0, 0xaab0},
+ {0xaab2, 0xaab4},
+ {0xaab7, 0xaab8},
+ {0xaabe, 0xaabf},
+ {0xaac1, 0xaac1},
+ {0xaaec, 0xaaed},
+ {0xaaf6, 0xaaf6},
+ {0xabe5, 0xabe5},
+ {0xabe8, 0xabe8},
+ {0xabed, 0xabed},
+ {0xfb1e, 0xfb1e},
+ {0xfe00, 0xfe0f},
+ {0xfe20, 0xfe2f},
+ {0x101fd, 0x101fd},
+ {0x102e0, 0x102e0},
+ {0x10376, 0x1037a},
+ {0x10a01, 0x10a03},
+ {0x10a05, 0x10a06},
+ {0x10a0c, 0x10a0f},
+ {0x10a38, 0x10a3a},
+ {0x10a3f, 0x10a3f},
+ {0x10ae5, 0x10ae6},
+ {0x10d24, 0x10d27},
+ {0x10eab, 0x10eac},
+ {0x10efd, 0x10eff},
+ {0x10f46, 0x10f50},
+ {0x10f82, 0x10f85},
+ {0x11001, 0x11001},
+ {0x11038, 0x11046},
+ {0x11070, 0x11070},
+ {0x11073, 0x11074},
+ {0x1107f, 0x11081},
+ {0x110b3, 0x110b6},
+ {0x110b9, 0x110ba},
+ {0x110c2, 0x110c2},
+ {0x11100, 0x11102},
+ {0x11127, 0x1112b},
+ {0x1112d, 0x11134},
+ {0x11173, 0x11173},
+ {0x11180, 0x11181},
+ {0x111b6, 0x111be},
+ {0x111c9, 0x111cc},
+ {0x111cf, 0x111cf},
+ {0x1122f, 0x11231},
+ {0x11234, 0x11234},
+ {0x11236, 0x11237},
+ {0x1123e, 0x1123e},
+ {0x11241, 0x11241},
+ {0x112df, 0x112df},
+ {0x112e3, 0x112ea},
+ {0x11300, 0x11301},
+ {0x1133b, 0x1133c},
+ {0x11340, 0x11340},
+ {0x11366, 0x1136c},
+ {0x11370, 0x11374},
+ {0x11438, 0x1143f},
+ {0x11442, 0x11444},
+ {0x11446, 0x11446},
+ {0x1145e, 0x1145e},
+ {0x114b3, 0x114b8},
+ {0x114ba, 0x114ba},
+ {0x114bf, 0x114c0},
+ {0x114c2, 0x114c3},
+ {0x115b2, 0x115b5},
+ {0x115bc, 0x115bd},
+ {0x115bf, 0x115c0},
+ {0x115dc, 0x115dd},
+ {0x11633, 0x1163a},
+ {0x1163d, 0x1163d},
+ {0x1163f, 0x11640},
+ {0x116ab, 0x116ab},
+ {0x116ad, 0x116ad},
+ {0x116b0, 0x116b5},
+ {0x116b7, 0x116b7},
+ {0x1171d, 0x1171f},
+ {0x11722, 0x11725},
+ {0x11727, 0x1172b},
+ {0x1182f, 0x11837},
+ {0x11839, 0x1183a},
+ {0x1193b, 0x1193c},
+ {0x1193e, 0x1193e},
+ {0x11943, 0x11943},
+ {0x119d4, 0x119d7},
+ {0x119da, 0x119db},
+ {0x119e0, 0x119e0},
+ {0x11a01, 0x11a0a},
+ {0x11a33, 0x11a38},
+ {0x11a3b, 0x11a3e},
+ {0x11a47, 0x11a47},
+ {0x11a51, 0x11a56},
+ {0x11a59, 0x11a5b},
+ {0x11a8a, 0x11a96},
+ {0x11a98, 0x11a99},
+ {0x11c30, 0x11c36},
+ {0x11c38, 0x11c3d},
+ {0x11c3f, 0x11c3f},
+ {0x11c92, 0x11ca7},
+ {0x11caa, 0x11cb0},
+ {0x11cb2, 0x11cb3},
+ {0x11cb5, 0x11cb6},
+ {0x11d31, 0x11d36},
+ {0x11d3a, 0x11d3a},
+ {0x11d3c, 0x11d3d},
+ {0x11d3f, 0x11d45},
+ {0x11d47, 0x11d47},
+ {0x11d90, 0x11d91},
+ {0x11d95, 0x11d95},
+ {0x11d97, 0x11d97},
+ {0x11ef3, 0x11ef4},
+ {0x11f00, 0x11f01},
+ {0x11f36, 0x11f3a},
+ {0x11f40, 0x11f40},
+ {0x11f42, 0x11f42},
+ {0x13440, 0x13440},
+ {0x13447, 0x13455},
+ {0x16af0, 0x16af4},
+ {0x16b30, 0x16b36},
+ {0x16f4f, 0x16f4f},
+ {0x16f8f, 0x16f92},
+ {0x16fe4, 0x16fe4},
+ {0x1bc9d, 0x1bc9e},
+ {0x1cf00, 0x1cf2d},
+ {0x1cf30, 0x1cf46},
+ {0x1d167, 0x1d169},
+ {0x1d17b, 0x1d182},
+ {0x1d185, 0x1d18b},
+ {0x1d1aa, 0x1d1ad},
+ {0x1d242, 0x1d244},
+ {0x1da00, 0x1da36},
+ {0x1da3b, 0x1da6c},
+ {0x1da75, 0x1da75},
+ {0x1da84, 0x1da84},
+ {0x1da9b, 0x1da9f},
+ {0x1daa1, 0x1daaf},
+ {0x1e000, 0x1e006},
+ {0x1e008, 0x1e018},
+ {0x1e01b, 0x1e021},
+ {0x1e023, 0x1e024},
+ {0x1e026, 0x1e02a},
+ {0x1e08f, 0x1e08f},
+ {0x1e130, 0x1e136},
+ {0x1e2ae, 0x1e2ae},
+ {0x1e2ec, 0x1e2ef},
+ {0x1e4ec, 0x1e4ef},
+ {0x1e8d0, 0x1e8d6},
+ {0x1e944, 0x1e94a},
+ {0xe0100, 0xe01ef}
+ };
+
+ return intable(combining, sizeof(combining), c);
+}
+
+/*
+ * Return TRUE for characters that can be displayed in a normal way.
+ * Only for characters of 0x100 and above!
+ */
+ int
+utf_printable(int c)
+{
+#ifdef USE_WCHAR_FUNCTIONS
+ /*
+ * Assume the iswprint() library function works better than our own stuff.
+ */
+ return iswprint(c);
+#else
+ // Sorted list of non-overlapping intervals.
+ // 0xd800-0xdfff is reserved for UTF-16, actually illegal.
+ static struct interval nonprint[] =
+ {
+ {0x070f, 0x070f}, {0x180b, 0x180e}, {0x200b, 0x200f}, {0x202a, 0x202e},
+ {0x2060, 0x206f}, {0xd800, 0xdfff}, {0xfeff, 0xfeff}, {0xfff9, 0xfffb},
+ {0xfffe, 0xffff}
+ };
+
+ return !intable(nonprint, sizeof(nonprint), c);
+#endif
+}
+
+// Sorted list of non-overlapping intervals of all Emoji characters,
+// based on http://unicode.org/emoji/charts/emoji-list.html
+// Generated by ../runtime/tools/unicode.vim.
+// Excludes 0x00a9 and 0x00ae because they are considered latin1.
+static struct interval emoji_all[] =
+{
+ {0x203c, 0x203c},
+ {0x2049, 0x2049},
+ {0x2122, 0x2122},
+ {0x2139, 0x2139},
+ {0x2194, 0x2199},
+ {0x21a9, 0x21aa},
+ {0x231a, 0x231b},
+ {0x2328, 0x2328},
+ {0x23cf, 0x23cf},
+ {0x23e9, 0x23f3},
+ {0x23f8, 0x23fa},
+ {0x24c2, 0x24c2},
+ {0x25aa, 0x25ab},
+ {0x25b6, 0x25b6},
+ {0x25c0, 0x25c0},
+ {0x25fb, 0x25fe},
+ {0x2600, 0x2604},
+ {0x260e, 0x260e},
+ {0x2611, 0x2611},
+ {0x2614, 0x2615},
+ {0x2618, 0x2618},
+ {0x261d, 0x261d},
+ {0x2620, 0x2620},
+ {0x2622, 0x2623},
+ {0x2626, 0x2626},
+ {0x262a, 0x262a},
+ {0x262e, 0x262f},
+ {0x2638, 0x263a},
+ {0x2640, 0x2640},
+ {0x2642, 0x2642},
+ {0x2648, 0x2653},
+ {0x265f, 0x2660},
+ {0x2663, 0x2663},
+ {0x2665, 0x2666},
+ {0x2668, 0x2668},
+ {0x267b, 0x267b},
+ {0x267e, 0x267f},
+ {0x2692, 0x2697},
+ {0x2699, 0x2699},
+ {0x269b, 0x269c},
+ {0x26a0, 0x26a1},
+ {0x26a7, 0x26a7},
+ {0x26aa, 0x26ab},
+ {0x26b0, 0x26b1},
+ {0x26bd, 0x26be},
+ {0x26c4, 0x26c5},
+ {0x26c8, 0x26c8},
+ {0x26ce, 0x26cf},
+ {0x26d1, 0x26d1},
+ {0x26d3, 0x26d4},
+ {0x26e9, 0x26ea},
+ {0x26f0, 0x26f5},
+ {0x26f7, 0x26fa},
+ {0x26fd, 0x26fd},
+ {0x2702, 0x2702},
+ {0x2705, 0x2705},
+ {0x2708, 0x270d},
+ {0x270f, 0x270f},
+ {0x2712, 0x2712},
+ {0x2714, 0x2714},
+ {0x2716, 0x2716},
+ {0x271d, 0x271d},
+ {0x2721, 0x2721},
+ {0x2728, 0x2728},
+ {0x2733, 0x2734},
+ {0x2744, 0x2744},
+ {0x2747, 0x2747},
+ {0x274c, 0x274c},
+ {0x274e, 0x274e},
+ {0x2753, 0x2755},
+ {0x2757, 0x2757},
+ {0x2763, 0x2764},
+ {0x2795, 0x2797},
+ {0x27a1, 0x27a1},
+ {0x27b0, 0x27b0},
+ {0x27bf, 0x27bf},
+ {0x2934, 0x2935},
+ {0x2b05, 0x2b07},
+ {0x2b1b, 0x2b1c},
+ {0x2b50, 0x2b50},
+ {0x2b55, 0x2b55},
+ {0x3030, 0x3030},
+ {0x303d, 0x303d},
+ {0x3297, 0x3297},
+ {0x3299, 0x3299},
+ {0x1f004, 0x1f004},
+ {0x1f0cf, 0x1f0cf},
+ {0x1f170, 0x1f171},
+ {0x1f17e, 0x1f17f},
+ {0x1f18e, 0x1f18e},
+ {0x1f191, 0x1f19a},
+ {0x1f1e6, 0x1f1ff},
+ {0x1f201, 0x1f202},
+ {0x1f21a, 0x1f21a},
+ {0x1f22f, 0x1f22f},
+ {0x1f232, 0x1f23a},
+ {0x1f250, 0x1f251},
+ {0x1f300, 0x1f321},
+ {0x1f324, 0x1f393},
+ {0x1f396, 0x1f397},
+ {0x1f399, 0x1f39b},
+ {0x1f39e, 0x1f3f0},
+ {0x1f3f3, 0x1f3f5},
+ {0x1f3f7, 0x1f4fd},
+ {0x1f4ff, 0x1f53d},
+ {0x1f549, 0x1f54e},
+ {0x1f550, 0x1f567},
+ {0x1f56f, 0x1f570},
+ {0x1f573, 0x1f57a},
+ {0x1f587, 0x1f587},
+ {0x1f58a, 0x1f58d},
+ {0x1f590, 0x1f590},
+ {0x1f595, 0x1f596},
+ {0x1f5a4, 0x1f5a5},
+ {0x1f5a8, 0x1f5a8},
+ {0x1f5b1, 0x1f5b2},
+ {0x1f5bc, 0x1f5bc},
+ {0x1f5c2, 0x1f5c4},
+ {0x1f5d1, 0x1f5d3},
+ {0x1f5dc, 0x1f5de},
+ {0x1f5e1, 0x1f5e1},
+ {0x1f5e3, 0x1f5e3},
+ {0x1f5e8, 0x1f5e8},
+ {0x1f5ef, 0x1f5ef},
+ {0x1f5f3, 0x1f5f3},
+ {0x1f5fa, 0x1f64f},
+ {0x1f680, 0x1f6c5},
+ {0x1f6cb, 0x1f6d2},
+ {0x1f6d5, 0x1f6d7},
+ {0x1f6dc, 0x1f6e5},
+ {0x1f6e9, 0x1f6e9},
+ {0x1f6eb, 0x1f6ec},
+ {0x1f6f0, 0x1f6f0},
+ {0x1f6f3, 0x1f6fc},
+ {0x1f7e0, 0x1f7eb},
+ {0x1f7f0, 0x1f7f0},
+ {0x1f90c, 0x1f93a},
+ {0x1f93c, 0x1f945},
+ {0x1f947, 0x1f9ff},
+ {0x1fa70, 0x1fa7c},
+ {0x1fa80, 0x1fa88},
+ {0x1fa90, 0x1fabd},
+ {0x1fabf, 0x1fac5},
+ {0x1face, 0x1fadb},
+ {0x1fae0, 0x1fae8},
+ {0x1faf0, 0x1faf8}
+};
+
+/*
+ * Get class of a Unicode character.
+ * 0: white space
+ * 1: punctuation
+ * 2 or bigger: some class of word character.
+ */
+ int
+utf_class(int c)
+{
+ return utf_class_buf(c, curbuf);
+}
+
+ int
+utf_class_buf(int c, buf_T *buf)
+{
+ // sorted list of non-overlapping intervals
+ static struct clinterval
+ {
+ unsigned int first;
+ unsigned int last;
+ unsigned int class;
+ } classes[] =
+ {
+ {0x037e, 0x037e, 1}, // Greek question mark
+ {0x0387, 0x0387, 1}, // Greek ano teleia
+ {0x055a, 0x055f, 1}, // Armenian punctuation
+ {0x0589, 0x0589, 1}, // Armenian full stop
+ {0x05be, 0x05be, 1},
+ {0x05c0, 0x05c0, 1},
+ {0x05c3, 0x05c3, 1},
+ {0x05f3, 0x05f4, 1},
+ {0x060c, 0x060c, 1},
+ {0x061b, 0x061b, 1},
+ {0x061f, 0x061f, 1},
+ {0x066a, 0x066d, 1},
+ {0x06d4, 0x06d4, 1},
+ {0x0700, 0x070d, 1}, // Syriac punctuation
+ {0x0964, 0x0965, 1},
+ {0x0970, 0x0970, 1},
+ {0x0df4, 0x0df4, 1},
+ {0x0e4f, 0x0e4f, 1},
+ {0x0e5a, 0x0e5b, 1},
+ {0x0f04, 0x0f12, 1},
+ {0x0f3a, 0x0f3d, 1},
+ {0x0f85, 0x0f85, 1},
+ {0x104a, 0x104f, 1}, // Myanmar punctuation
+ {0x10fb, 0x10fb, 1}, // Georgian punctuation
+ {0x1361, 0x1368, 1}, // Ethiopic punctuation
+ {0x166d, 0x166e, 1}, // Canadian Syl. punctuation
+ {0x1680, 0x1680, 0},
+ {0x169b, 0x169c, 1},
+ {0x16eb, 0x16ed, 1},
+ {0x1735, 0x1736, 1},
+ {0x17d4, 0x17dc, 1}, // Khmer punctuation
+ {0x1800, 0x180a, 1}, // Mongolian punctuation
+ {0x2000, 0x200b, 0}, // spaces
+ {0x200c, 0x2027, 1}, // punctuation and symbols
+ {0x2028, 0x2029, 0},
+ {0x202a, 0x202e, 1}, // punctuation and symbols
+ {0x202f, 0x202f, 0},
+ {0x2030, 0x205e, 1}, // punctuation and symbols
+ {0x205f, 0x205f, 0},
+ {0x2060, 0x27ff, 1}, // punctuation and symbols
+ {0x2070, 0x207f, 0x2070}, // superscript
+ {0x2080, 0x2094, 0x2080}, // subscript
+ {0x20a0, 0x27ff, 1}, // all kinds of symbols
+ {0x2800, 0x28ff, 0x2800}, // braille
+ {0x2900, 0x2998, 1}, // arrows, brackets, etc.
+ {0x29d8, 0x29db, 1},
+ {0x29fc, 0x29fd, 1},
+ {0x2e00, 0x2e7f, 1}, // supplemental punctuation
+ {0x3000, 0x3000, 0}, // ideographic space
+ {0x3001, 0x3020, 1}, // ideographic punctuation
+ {0x3030, 0x3030, 1},
+ {0x303d, 0x303d, 1},
+ {0x3040, 0x309f, 0x3040}, // Hiragana
+ {0x30a0, 0x30ff, 0x30a0}, // Katakana
+ {0x3300, 0x9fff, 0x4e00}, // CJK Ideographs
+ {0xac00, 0xd7a3, 0xac00}, // Hangul Syllables
+ {0xf900, 0xfaff, 0x4e00}, // CJK Ideographs
+ {0xfd3e, 0xfd3f, 1},
+ {0xfe30, 0xfe6b, 1}, // punctuation forms
+ {0xff00, 0xff0f, 1}, // half/fullwidth ASCII
+ {0xff1a, 0xff20, 1}, // half/fullwidth ASCII
+ {0xff3b, 0xff40, 1}, // half/fullwidth ASCII
+ {0xff5b, 0xff65, 1}, // half/fullwidth ASCII
+ {0x1d000, 0x1d24f, 1}, // Musical notation
+ {0x1d400, 0x1d7ff, 1}, // Mathematical Alphanumeric Symbols
+ {0x1f000, 0x1f2ff, 1}, // Game pieces; enclosed characters
+ {0x1f300, 0x1f9ff, 1}, // Many symbol blocks
+ {0x20000, 0x2a6df, 0x4e00}, // CJK Ideographs
+ {0x2a700, 0x2b73f, 0x4e00}, // CJK Ideographs
+ {0x2b740, 0x2b81f, 0x4e00}, // CJK Ideographs
+ {0x2f800, 0x2fa1f, 0x4e00}, // CJK Ideographs
+ };
+
+ int bot = 0;
+ int top = ARRAY_LENGTH(classes) - 1;
+ int mid;
+
+ // First quick check for Latin1 characters, use 'iskeyword'.
+ if (c < 0x100)
+ {
+ if (c == ' ' || c == '\t' || c == NUL || c == 0xa0)
+ return 0; // blank
+ if (vim_iswordc_buf(c, buf))
+ return 2; // word character
+ return 1; // punctuation
+ }
+
+ // emoji
+ if (intable(emoji_all, sizeof(emoji_all), c))
+ return 3;
+
+ // binary search in table
+ while (top >= bot)
+ {
+ mid = (bot + top) / 2;
+ if (classes[mid].last < (unsigned int)c)
+ bot = mid + 1;
+ else if (classes[mid].first > (unsigned int)c)
+ top = mid - 1;
+ else
+ return (int)classes[mid].class;
+ }
+
+ // most other characters are "word" characters
+ return 2;
+}
+
+ int
+utf_ambiguous_width(int c)
+{
+ return c >= 0x80 && (intable(ambiguous, sizeof(ambiguous), c)
+ || intable(emoji_all, sizeof(emoji_all), c));
+}
+
+/*
+ * Code for Unicode case-dependent operations. Based on notes in
+ * http://www.unicode.org/Public/UNIDATA/CaseFolding.txt
+ * This code uses simple case folding, not full case folding.
+ * Last updated for Unicode 5.2.
+ */
+
+/*
+ * The following tables are built by ../runtime/tools/unicode.vim.
+ * They must be in numeric order, because we use binary search.
+ * An entry such as {0x41,0x5a,1,32} means that Unicode characters in the
+ * range from 0x41 to 0x5a inclusive, stepping by 1, are changed to
+ * folded/upper/lower by adding 32.
+ */
+typedef struct
+{
+ int rangeStart;
+ int rangeEnd;
+ int step;
+ int offset;
+} convertStruct;
+
+static convertStruct foldCase[] =
+{
+ {0x41,0x5a,1,32},
+ {0xb5,0xb5,-1,775},
+ {0xc0,0xd6,1,32},
+ {0xd8,0xde,1,32},
+ {0x100,0x12e,2,1},
+ {0x132,0x136,2,1},
+ {0x139,0x147,2,1},
+ {0x14a,0x176,2,1},
+ {0x178,0x178,-1,-121},
+ {0x179,0x17d,2,1},
+ {0x17f,0x17f,-1,-268},
+ {0x181,0x181,-1,210},
+ {0x182,0x184,2,1},
+ {0x186,0x186,-1,206},
+ {0x187,0x187,-1,1},
+ {0x189,0x18a,1,205},
+ {0x18b,0x18b,-1,1},
+ {0x18e,0x18e,-1,79},
+ {0x18f,0x18f,-1,202},
+ {0x190,0x190,-1,203},
+ {0x191,0x191,-1,1},
+ {0x193,0x193,-1,205},
+ {0x194,0x194,-1,207},
+ {0x196,0x196,-1,211},
+ {0x197,0x197,-1,209},
+ {0x198,0x198,-1,1},
+ {0x19c,0x19c,-1,211},
+ {0x19d,0x19d,-1,213},
+ {0x19f,0x19f,-1,214},
+ {0x1a0,0x1a4,2,1},
+ {0x1a6,0x1a6,-1,218},
+ {0x1a7,0x1a7,-1,1},
+ {0x1a9,0x1a9,-1,218},
+ {0x1ac,0x1ac,-1,1},
+ {0x1ae,0x1ae,-1,218},
+ {0x1af,0x1af,-1,1},
+ {0x1b1,0x1b2,1,217},
+ {0x1b3,0x1b5,2,1},
+ {0x1b7,0x1b7,-1,219},
+ {0x1b8,0x1bc,4,1},
+ {0x1c4,0x1c4,-1,2},
+ {0x1c5,0x1c5,-1,1},
+ {0x1c7,0x1c7,-1,2},
+ {0x1c8,0x1c8,-1,1},
+ {0x1ca,0x1ca,-1,2},
+ {0x1cb,0x1db,2,1},
+ {0x1de,0x1ee,2,1},
+ {0x1f1,0x1f1,-1,2},
+ {0x1f2,0x1f4,2,1},
+ {0x1f6,0x1f6,-1,-97},
+ {0x1f7,0x1f7,-1,-56},
+ {0x1f8,0x21e,2,1},
+ {0x220,0x220,-1,-130},
+ {0x222,0x232,2,1},
+ {0x23a,0x23a,-1,10795},
+ {0x23b,0x23b,-1,1},
+ {0x23d,0x23d,-1,-163},
+ {0x23e,0x23e,-1,10792},
+ {0x241,0x241,-1,1},
+ {0x243,0x243,-1,-195},
+ {0x244,0x244,-1,69},
+ {0x245,0x245,-1,71},
+ {0x246,0x24e,2,1},
+ {0x345,0x345,-1,116},
+ {0x370,0x372,2,1},
+ {0x376,0x376,-1,1},
+ {0x37f,0x37f,-1,116},
+ {0x386,0x386,-1,38},
+ {0x388,0x38a,1,37},
+ {0x38c,0x38c,-1,64},
+ {0x38e,0x38f,1,63},
+ {0x391,0x3a1,1,32},
+ {0x3a3,0x3ab,1,32},
+ {0x3c2,0x3c2,-1,1},
+ {0x3cf,0x3cf,-1,8},
+ {0x3d0,0x3d0,-1,-30},
+ {0x3d1,0x3d1,-1,-25},
+ {0x3d5,0x3d5,-1,-15},
+ {0x3d6,0x3d6,-1,-22},
+ {0x3d8,0x3ee,2,1},
+ {0x3f0,0x3f0,-1,-54},
+ {0x3f1,0x3f1,-1,-48},
+ {0x3f4,0x3f4,-1,-60},
+ {0x3f5,0x3f5,-1,-64},
+ {0x3f7,0x3f7,-1,1},
+ {0x3f9,0x3f9,-1,-7},
+ {0x3fa,0x3fa,-1,1},
+ {0x3fd,0x3ff,1,-130},
+ {0x400,0x40f,1,80},
+ {0x410,0x42f,1,32},
+ {0x460,0x480,2,1},
+ {0x48a,0x4be,2,1},
+ {0x4c0,0x4c0,-1,15},
+ {0x4c1,0x4cd,2,1},
+ {0x4d0,0x52e,2,1},
+ {0x531,0x556,1,48},
+ {0x10a0,0x10c5,1,7264},
+ {0x10c7,0x10cd,6,7264},
+ {0x13f8,0x13fd,1,-8},
+ {0x1c80,0x1c80,-1,-6222},
+ {0x1c81,0x1c81,-1,-6221},
+ {0x1c82,0x1c82,-1,-6212},
+ {0x1c83,0x1c84,1,-6210},
+ {0x1c85,0x1c85,-1,-6211},
+ {0x1c86,0x1c86,-1,-6204},
+ {0x1c87,0x1c87,-1,-6180},
+ {0x1c88,0x1c88,-1,35267},
+ {0x1c90,0x1cba,1,-3008},
+ {0x1cbd,0x1cbf,1,-3008},
+ {0x1e00,0x1e94,2,1},
+ {0x1e9b,0x1e9b,-1,-58},
+ {0x1e9e,0x1e9e,-1,-7615},
+ {0x1ea0,0x1efe,2,1},
+ {0x1f08,0x1f0f,1,-8},
+ {0x1f18,0x1f1d,1,-8},
+ {0x1f28,0x1f2f,1,-8},
+ {0x1f38,0x1f3f,1,-8},
+ {0x1f48,0x1f4d,1,-8},
+ {0x1f59,0x1f5f,2,-8},
+ {0x1f68,0x1f6f,1,-8},
+ {0x1f88,0x1f8f,1,-8},
+ {0x1f98,0x1f9f,1,-8},
+ {0x1fa8,0x1faf,1,-8},
+ {0x1fb8,0x1fb9,1,-8},
+ {0x1fba,0x1fbb,1,-74},
+ {0x1fbc,0x1fbc,-1,-9},
+ {0x1fbe,0x1fbe,-1,-7173},
+ {0x1fc8,0x1fcb,1,-86},
+ {0x1fcc,0x1fcc,-1,-9},
+ {0x1fd8,0x1fd9,1,-8},
+ {0x1fda,0x1fdb,1,-100},
+ {0x1fe8,0x1fe9,1,-8},
+ {0x1fea,0x1feb,1,-112},
+ {0x1fec,0x1fec,-1,-7},
+ {0x1ff8,0x1ff9,1,-128},
+ {0x1ffa,0x1ffb,1,-126},
+ {0x1ffc,0x1ffc,-1,-9},
+ {0x2126,0x2126,-1,-7517},
+ {0x212a,0x212a,-1,-8383},
+ {0x212b,0x212b,-1,-8262},
+ {0x2132,0x2132,-1,28},
+ {0x2160,0x216f,1,16},
+ {0x2183,0x2183,-1,1},
+ {0x24b6,0x24cf,1,26},
+ {0x2c00,0x2c2f,1,48},
+ {0x2c60,0x2c60,-1,1},
+ {0x2c62,0x2c62,-1,-10743},
+ {0x2c63,0x2c63,-1,-3814},
+ {0x2c64,0x2c64,-1,-10727},
+ {0x2c67,0x2c6b,2,1},
+ {0x2c6d,0x2c6d,-1,-10780},
+ {0x2c6e,0x2c6e,-1,-10749},
+ {0x2c6f,0x2c6f,-1,-10783},
+ {0x2c70,0x2c70,-1,-10782},
+ {0x2c72,0x2c75,3,1},
+ {0x2c7e,0x2c7f,1,-10815},
+ {0x2c80,0x2ce2,2,1},
+ {0x2ceb,0x2ced,2,1},
+ {0x2cf2,0xa640,31054,1},
+ {0xa642,0xa66c,2,1},
+ {0xa680,0xa69a,2,1},
+ {0xa722,0xa72e,2,1},
+ {0xa732,0xa76e,2,1},
+ {0xa779,0xa77b,2,1},
+ {0xa77d,0xa77d,-1,-35332},
+ {0xa77e,0xa786,2,1},
+ {0xa78b,0xa78b,-1,1},
+ {0xa78d,0xa78d,-1,-42280},
+ {0xa790,0xa792,2,1},
+ {0xa796,0xa7a8,2,1},
+ {0xa7aa,0xa7aa,-1,-42308},
+ {0xa7ab,0xa7ab,-1,-42319},
+ {0xa7ac,0xa7ac,-1,-42315},
+ {0xa7ad,0xa7ad,-1,-42305},
+ {0xa7ae,0xa7ae,-1,-42308},
+ {0xa7b0,0xa7b0,-1,-42258},
+ {0xa7b1,0xa7b1,-1,-42282},
+ {0xa7b2,0xa7b2,-1,-42261},
+ {0xa7b3,0xa7b3,-1,928},
+ {0xa7b4,0xa7c2,2,1},
+ {0xa7c4,0xa7c4,-1,-48},
+ {0xa7c5,0xa7c5,-1,-42307},
+ {0xa7c6,0xa7c6,-1,-35384},
+ {0xa7c7,0xa7c9,2,1},
+ {0xa7d0,0xa7d6,6,1},
+ {0xa7d8,0xa7f5,29,1},
+ {0xab70,0xabbf,1,-38864},
+ {0xff21,0xff3a,1,32},
+ {0x10400,0x10427,1,40},
+ {0x104b0,0x104d3,1,40},
+ {0x10570,0x1057a,1,39},
+ {0x1057c,0x1058a,1,39},
+ {0x1058c,0x10592,1,39},
+ {0x10594,0x10595,1,39},
+ {0x10c80,0x10cb2,1,64},
+ {0x118a0,0x118bf,1,32},
+ {0x16e40,0x16e5f,1,32},
+ {0x1e900,0x1e921,1,34}
+};
+
+/*
+ * Generic conversion function for case operations.
+ * Return the converted equivalent of "a", which is a UCS-4 character. Use
+ * the given conversion "table". Uses binary search on "table".
+ */
+ static int
+utf_convert(
+ int a,
+ convertStruct table[],
+ int tableSize)
+{
+ int start, mid, end; // indices into table
+ int entries = tableSize / sizeof(convertStruct);
+
+ start = 0;
+ end = entries;
+ while (start < end)
+ {
+ // need to search further
+ mid = (end + start) / 2;
+ if (table[mid].rangeEnd < a)
+ start = mid + 1;
+ else
+ end = mid;
+ }
+ if (start < entries
+ && table[start].rangeStart <= a
+ && a <= table[start].rangeEnd
+ && (a - table[start].rangeStart) % table[start].step == 0)
+ return (a + table[start].offset);
+ else
+ return a;
+}
+
+/*
+ * Return the folded-case equivalent of "a", which is a UCS-4 character. Uses
+ * simple case folding.
+ */
+ int
+utf_fold(int a)
+{
+ if (a < 0x80)
+ // be fast for ASCII
+ return a >= 0x41 && a <= 0x5a ? a + 32 : a;
+ return utf_convert(a, foldCase, (int)sizeof(foldCase));
+}
+
+static convertStruct toLower[] =
+{
+ {0x41,0x5a,1,32},
+ {0xc0,0xd6,1,32},
+ {0xd8,0xde,1,32},
+ {0x100,0x12e,2,1},
+ {0x130,0x130,-1,-199},
+ {0x132,0x136,2,1},
+ {0x139,0x147,2,1},
+ {0x14a,0x176,2,1},
+ {0x178,0x178,-1,-121},
+ {0x179,0x17d,2,1},
+ {0x181,0x181,-1,210},
+ {0x182,0x184,2,1},
+ {0x186,0x186,-1,206},
+ {0x187,0x187,-1,1},
+ {0x189,0x18a,1,205},
+ {0x18b,0x18b,-1,1},
+ {0x18e,0x18e,-1,79},
+ {0x18f,0x18f,-1,202},
+ {0x190,0x190,-1,203},
+ {0x191,0x191,-1,1},
+ {0x193,0x193,-1,205},
+ {0x194,0x194,-1,207},
+ {0x196,0x196,-1,211},
+ {0x197,0x197,-1,209},
+ {0x198,0x198,-1,1},
+ {0x19c,0x19c,-1,211},
+ {0x19d,0x19d,-1,213},
+ {0x19f,0x19f,-1,214},
+ {0x1a0,0x1a4,2,1},
+ {0x1a6,0x1a6,-1,218},
+ {0x1a7,0x1a7,-1,1},
+ {0x1a9,0x1a9,-1,218},
+ {0x1ac,0x1ac,-1,1},
+ {0x1ae,0x1ae,-1,218},
+ {0x1af,0x1af,-1,1},
+ {0x1b1,0x1b2,1,217},
+ {0x1b3,0x1b5,2,1},
+ {0x1b7,0x1b7,-1,219},
+ {0x1b8,0x1bc,4,1},
+ {0x1c4,0x1c4,-1,2},
+ {0x1c5,0x1c5,-1,1},
+ {0x1c7,0x1c7,-1,2},
+ {0x1c8,0x1c8,-1,1},
+ {0x1ca,0x1ca,-1,2},
+ {0x1cb,0x1db,2,1},
+ {0x1de,0x1ee,2,1},
+ {0x1f1,0x1f1,-1,2},
+ {0x1f2,0x1f4,2,1},
+ {0x1f6,0x1f6,-1,-97},
+ {0x1f7,0x1f7,-1,-56},
+ {0x1f8,0x21e,2,1},
+ {0x220,0x220,-1,-130},
+ {0x222,0x232,2,1},
+ {0x23a,0x23a,-1,10795},
+ {0x23b,0x23b,-1,1},
+ {0x23d,0x23d,-1,-163},
+ {0x23e,0x23e,-1,10792},
+ {0x241,0x241,-1,1},
+ {0x243,0x243,-1,-195},
+ {0x244,0x244,-1,69},
+ {0x245,0x245,-1,71},
+ {0x246,0x24e,2,1},
+ {0x370,0x372,2,1},
+ {0x376,0x376,-1,1},
+ {0x37f,0x37f,-1,116},
+ {0x386,0x386,-1,38},
+ {0x388,0x38a,1,37},
+ {0x38c,0x38c,-1,64},
+ {0x38e,0x38f,1,63},
+ {0x391,0x3a1,1,32},
+ {0x3a3,0x3ab,1,32},
+ {0x3cf,0x3cf,-1,8},
+ {0x3d8,0x3ee,2,1},
+ {0x3f4,0x3f4,-1,-60},
+ {0x3f7,0x3f7,-1,1},
+ {0x3f9,0x3f9,-1,-7},
+ {0x3fa,0x3fa,-1,1},
+ {0x3fd,0x3ff,1,-130},
+ {0x400,0x40f,1,80},
+ {0x410,0x42f,1,32},
+ {0x460,0x480,2,1},
+ {0x48a,0x4be,2,1},
+ {0x4c0,0x4c0,-1,15},
+ {0x4c1,0x4cd,2,1},
+ {0x4d0,0x52e,2,1},
+ {0x531,0x556,1,48},
+ {0x10a0,0x10c5,1,7264},
+ {0x10c7,0x10cd,6,7264},
+ {0x13a0,0x13ef,1,38864},
+ {0x13f0,0x13f5,1,8},
+ {0x1c90,0x1cba,1,-3008},
+ {0x1cbd,0x1cbf,1,-3008},
+ {0x1e00,0x1e94,2,1},
+ {0x1e9e,0x1e9e,-1,-7615},
+ {0x1ea0,0x1efe,2,1},
+ {0x1f08,0x1f0f,1,-8},
+ {0x1f18,0x1f1d,1,-8},
+ {0x1f28,0x1f2f,1,-8},
+ {0x1f38,0x1f3f,1,-8},
+ {0x1f48,0x1f4d,1,-8},
+ {0x1f59,0x1f5f,2,-8},
+ {0x1f68,0x1f6f,1,-8},
+ {0x1f88,0x1f8f,1,-8},
+ {0x1f98,0x1f9f,1,-8},
+ {0x1fa8,0x1faf,1,-8},
+ {0x1fb8,0x1fb9,1,-8},
+ {0x1fba,0x1fbb,1,-74},
+ {0x1fbc,0x1fbc,-1,-9},
+ {0x1fc8,0x1fcb,1,-86},
+ {0x1fcc,0x1fcc,-1,-9},
+ {0x1fd8,0x1fd9,1,-8},
+ {0x1fda,0x1fdb,1,-100},
+ {0x1fe8,0x1fe9,1,-8},
+ {0x1fea,0x1feb,1,-112},
+ {0x1fec,0x1fec,-1,-7},
+ {0x1ff8,0x1ff9,1,-128},
+ {0x1ffa,0x1ffb,1,-126},
+ {0x1ffc,0x1ffc,-1,-9},
+ {0x2126,0x2126,-1,-7517},
+ {0x212a,0x212a,-1,-8383},
+ {0x212b,0x212b,-1,-8262},
+ {0x2132,0x2132,-1,28},
+ {0x2160,0x216f,1,16},
+ {0x2183,0x2183,-1,1},
+ {0x24b6,0x24cf,1,26},
+ {0x2c00,0x2c2f,1,48},
+ {0x2c60,0x2c60,-1,1},
+ {0x2c62,0x2c62,-1,-10743},
+ {0x2c63,0x2c63,-1,-3814},
+ {0x2c64,0x2c64,-1,-10727},
+ {0x2c67,0x2c6b,2,1},
+ {0x2c6d,0x2c6d,-1,-10780},
+ {0x2c6e,0x2c6e,-1,-10749},
+ {0x2c6f,0x2c6f,-1,-10783},
+ {0x2c70,0x2c70,-1,-10782},
+ {0x2c72,0x2c75,3,1},
+ {0x2c7e,0x2c7f,1,-10815},
+ {0x2c80,0x2ce2,2,1},
+ {0x2ceb,0x2ced,2,1},
+ {0x2cf2,0xa640,31054,1},
+ {0xa642,0xa66c,2,1},
+ {0xa680,0xa69a,2,1},
+ {0xa722,0xa72e,2,1},
+ {0xa732,0xa76e,2,1},
+ {0xa779,0xa77b,2,1},
+ {0xa77d,0xa77d,-1,-35332},
+ {0xa77e,0xa786,2,1},
+ {0xa78b,0xa78b,-1,1},
+ {0xa78d,0xa78d,-1,-42280},
+ {0xa790,0xa792,2,1},
+ {0xa796,0xa7a8,2,1},
+ {0xa7aa,0xa7aa,-1,-42308},
+ {0xa7ab,0xa7ab,-1,-42319},
+ {0xa7ac,0xa7ac,-1,-42315},
+ {0xa7ad,0xa7ad,-1,-42305},
+ {0xa7ae,0xa7ae,-1,-42308},
+ {0xa7b0,0xa7b0,-1,-42258},
+ {0xa7b1,0xa7b1,-1,-42282},
+ {0xa7b2,0xa7b2,-1,-42261},
+ {0xa7b3,0xa7b3,-1,928},
+ {0xa7b4,0xa7c2,2,1},
+ {0xa7c4,0xa7c4,-1,-48},
+ {0xa7c5,0xa7c5,-1,-42307},
+ {0xa7c6,0xa7c6,-1,-35384},
+ {0xa7c7,0xa7c9,2,1},
+ {0xa7d0,0xa7d6,6,1},
+ {0xa7d8,0xa7f5,29,1},
+ {0xff21,0xff3a,1,32},
+ {0x10400,0x10427,1,40},
+ {0x104b0,0x104d3,1,40},
+ {0x10570,0x1057a,1,39},
+ {0x1057c,0x1058a,1,39},
+ {0x1058c,0x10592,1,39},
+ {0x10594,0x10595,1,39},
+ {0x10c80,0x10cb2,1,64},
+ {0x118a0,0x118bf,1,32},
+ {0x16e40,0x16e5f,1,32},
+ {0x1e900,0x1e921,1,34}
+};
+
+static convertStruct toUpper[] =
+{
+ {0x61,0x7a,1,-32},
+ {0xb5,0xb5,-1,743},
+ {0xe0,0xf6,1,-32},
+ {0xf8,0xfe,1,-32},
+ {0xff,0xff,-1,121},
+ {0x101,0x12f,2,-1},
+ {0x131,0x131,-1,-232},
+ {0x133,0x137,2,-1},
+ {0x13a,0x148,2,-1},
+ {0x14b,0x177,2,-1},
+ {0x17a,0x17e,2,-1},
+ {0x17f,0x17f,-1,-300},
+ {0x180,0x180,-1,195},
+ {0x183,0x185,2,-1},
+ {0x188,0x18c,4,-1},
+ {0x192,0x192,-1,-1},
+ {0x195,0x195,-1,97},
+ {0x199,0x199,-1,-1},
+ {0x19a,0x19a,-1,163},
+ {0x19e,0x19e,-1,130},
+ {0x1a1,0x1a5,2,-1},
+ {0x1a8,0x1ad,5,-1},
+ {0x1b0,0x1b4,4,-1},
+ {0x1b6,0x1b9,3,-1},
+ {0x1bd,0x1bd,-1,-1},
+ {0x1bf,0x1bf,-1,56},
+ {0x1c5,0x1c5,-1,-1},
+ {0x1c6,0x1c6,-1,-2},
+ {0x1c8,0x1c8,-1,-1},
+ {0x1c9,0x1c9,-1,-2},
+ {0x1cb,0x1cb,-1,-1},
+ {0x1cc,0x1cc,-1,-2},
+ {0x1ce,0x1dc,2,-1},
+ {0x1dd,0x1dd,-1,-79},
+ {0x1df,0x1ef,2,-1},
+ {0x1f2,0x1f2,-1,-1},
+ {0x1f3,0x1f3,-1,-2},
+ {0x1f5,0x1f9,4,-1},
+ {0x1fb,0x21f,2,-1},
+ {0x223,0x233,2,-1},
+ {0x23c,0x23c,-1,-1},
+ {0x23f,0x240,1,10815},
+ {0x242,0x247,5,-1},
+ {0x249,0x24f,2,-1},
+ {0x250,0x250,-1,10783},
+ {0x251,0x251,-1,10780},
+ {0x252,0x252,-1,10782},
+ {0x253,0x253,-1,-210},
+ {0x254,0x254,-1,-206},
+ {0x256,0x257,1,-205},
+ {0x259,0x259,-1,-202},
+ {0x25b,0x25b,-1,-203},
+ {0x25c,0x25c,-1,42319},
+ {0x260,0x260,-1,-205},
+ {0x261,0x261,-1,42315},
+ {0x263,0x263,-1,-207},
+ {0x265,0x265,-1,42280},
+ {0x266,0x266,-1,42308},
+ {0x268,0x268,-1,-209},
+ {0x269,0x269,-1,-211},
+ {0x26a,0x26a,-1,42308},
+ {0x26b,0x26b,-1,10743},
+ {0x26c,0x26c,-1,42305},
+ {0x26f,0x26f,-1,-211},
+ {0x271,0x271,-1,10749},
+ {0x272,0x272,-1,-213},
+ {0x275,0x275,-1,-214},
+ {0x27d,0x27d,-1,10727},
+ {0x280,0x280,-1,-218},
+ {0x282,0x282,-1,42307},
+ {0x283,0x283,-1,-218},
+ {0x287,0x287,-1,42282},
+ {0x288,0x288,-1,-218},
+ {0x289,0x289,-1,-69},
+ {0x28a,0x28b,1,-217},
+ {0x28c,0x28c,-1,-71},
+ {0x292,0x292,-1,-219},
+ {0x29d,0x29d,-1,42261},
+ {0x29e,0x29e,-1,42258},
+ {0x345,0x345,-1,84},
+ {0x371,0x373,2,-1},
+ {0x377,0x377,-1,-1},
+ {0x37b,0x37d,1,130},
+ {0x3ac,0x3ac,-1,-38},
+ {0x3ad,0x3af,1,-37},
+ {0x3b1,0x3c1,1,-32},
+ {0x3c2,0x3c2,-1,-31},
+ {0x3c3,0x3cb,1,-32},
+ {0x3cc,0x3cc,-1,-64},
+ {0x3cd,0x3ce,1,-63},
+ {0x3d0,0x3d0,-1,-62},
+ {0x3d1,0x3d1,-1,-57},
+ {0x3d5,0x3d5,-1,-47},
+ {0x3d6,0x3d6,-1,-54},
+ {0x3d7,0x3d7,-1,-8},
+ {0x3d9,0x3ef,2,-1},
+ {0x3f0,0x3f0,-1,-86},
+ {0x3f1,0x3f1,-1,-80},
+ {0x3f2,0x3f2,-1,7},
+ {0x3f3,0x3f3,-1,-116},
+ {0x3f5,0x3f5,-1,-96},
+ {0x3f8,0x3fb,3,-1},
+ {0x430,0x44f,1,-32},
+ {0x450,0x45f,1,-80},
+ {0x461,0x481,2,-1},
+ {0x48b,0x4bf,2,-1},
+ {0x4c2,0x4ce,2,-1},
+ {0x4cf,0x4cf,-1,-15},
+ {0x4d1,0x52f,2,-1},
+ {0x561,0x586,1,-48},
+ {0x10d0,0x10fa,1,3008},
+ {0x10fd,0x10ff,1,3008},
+ {0x13f8,0x13fd,1,-8},
+ {0x1c80,0x1c80,-1,-6254},
+ {0x1c81,0x1c81,-1,-6253},
+ {0x1c82,0x1c82,-1,-6244},
+ {0x1c83,0x1c84,1,-6242},
+ {0x1c85,0x1c85,-1,-6243},
+ {0x1c86,0x1c86,-1,-6236},
+ {0x1c87,0x1c87,-1,-6181},
+ {0x1c88,0x1c88,-1,35266},
+ {0x1d79,0x1d79,-1,35332},
+ {0x1d7d,0x1d7d,-1,3814},
+ {0x1d8e,0x1d8e,-1,35384},
+ {0x1e01,0x1e95,2,-1},
+ {0x1e9b,0x1e9b,-1,-59},
+ {0x1ea1,0x1eff,2,-1},
+ {0x1f00,0x1f07,1,8},
+ {0x1f10,0x1f15,1,8},
+ {0x1f20,0x1f27,1,8},
+ {0x1f30,0x1f37,1,8},
+ {0x1f40,0x1f45,1,8},
+ {0x1f51,0x1f57,2,8},
+ {0x1f60,0x1f67,1,8},
+ {0x1f70,0x1f71,1,74},
+ {0x1f72,0x1f75,1,86},
+ {0x1f76,0x1f77,1,100},
+ {0x1f78,0x1f79,1,128},
+ {0x1f7a,0x1f7b,1,112},
+ {0x1f7c,0x1f7d,1,126},
+ {0x1f80,0x1f87,1,8},
+ {0x1f90,0x1f97,1,8},
+ {0x1fa0,0x1fa7,1,8},
+ {0x1fb0,0x1fb1,1,8},
+ {0x1fb3,0x1fb3,-1,9},
+ {0x1fbe,0x1fbe,-1,-7205},
+ {0x1fc3,0x1fc3,-1,9},
+ {0x1fd0,0x1fd1,1,8},
+ {0x1fe0,0x1fe1,1,8},
+ {0x1fe5,0x1fe5,-1,7},
+ {0x1ff3,0x1ff3,-1,9},
+ {0x214e,0x214e,-1,-28},
+ {0x2170,0x217f,1,-16},
+ {0x2184,0x2184,-1,-1},
+ {0x24d0,0x24e9,1,-26},
+ {0x2c30,0x2c5f,1,-48},
+ {0x2c61,0x2c61,-1,-1},
+ {0x2c65,0x2c65,-1,-10795},
+ {0x2c66,0x2c66,-1,-10792},
+ {0x2c68,0x2c6c,2,-1},
+ {0x2c73,0x2c76,3,-1},
+ {0x2c81,0x2ce3,2,-1},
+ {0x2cec,0x2cee,2,-1},
+ {0x2cf3,0x2cf3,-1,-1},
+ {0x2d00,0x2d25,1,-7264},
+ {0x2d27,0x2d2d,6,-7264},
+ {0xa641,0xa66d,2,-1},
+ {0xa681,0xa69b,2,-1},
+ {0xa723,0xa72f,2,-1},
+ {0xa733,0xa76f,2,-1},
+ {0xa77a,0xa77c,2,-1},
+ {0xa77f,0xa787,2,-1},
+ {0xa78c,0xa791,5,-1},
+ {0xa793,0xa793,-1,-1},
+ {0xa794,0xa794,-1,48},
+ {0xa797,0xa7a9,2,-1},
+ {0xa7b5,0xa7c3,2,-1},
+ {0xa7c8,0xa7ca,2,-1},
+ {0xa7d1,0xa7d7,6,-1},
+ {0xa7d9,0xa7f6,29,-1},
+ {0xab53,0xab53,-1,-928},
+ {0xab70,0xabbf,1,-38864},
+ {0xff41,0xff5a,1,-32},
+ {0x10428,0x1044f,1,-40},
+ {0x104d8,0x104fb,1,-40},
+ {0x10597,0x105a1,1,-39},
+ {0x105a3,0x105b1,1,-39},
+ {0x105b3,0x105b9,1,-39},
+ {0x105bb,0x105bc,1,-39},
+ {0x10cc0,0x10cf2,1,-64},
+ {0x118c0,0x118df,1,-32},
+ {0x16e60,0x16e7f,1,-32},
+ {0x1e922,0x1e943,1,-34}
+};
+
+/*
+ * Return the upper-case equivalent of "a", which is a UCS-4 character. Use
+ * simple case folding.
+ */
+ int
+utf_toupper(int a)
+{
+ // If 'casemap' contains "keepascii" use ASCII style toupper().
+ if (a < 128 && (cmp_flags & CMP_KEEPASCII))
+ return TOUPPER_ASC(a);
+
+#if defined(HAVE_TOWUPPER) && defined(__STDC_ISO_10646__)
+ // If towupper() is available and handles Unicode, use it.
+ if (!(cmp_flags & CMP_INTERNAL))
+ return towupper(a);
+#endif
+
+ // For characters below 128 use locale sensitive toupper().
+ if (a < 128)
+ return TOUPPER_LOC(a);
+
+ // For any other characters use the above mapping table.
+ return utf_convert(a, toUpper, (int)sizeof(toUpper));
+}
+
+ int
+utf_islower(int a)
+{
+ // German sharp s is lower case but has no upper case equivalent.
+ return (utf_toupper(a) != a) || a == 0xdf;
+}
+
+/*
+ * Return the lower-case equivalent of "a", which is a UCS-4 character. Use
+ * simple case folding.
+ */
+ int
+utf_tolower(int a)
+{
+ // If 'casemap' contains "keepascii" use ASCII style tolower().
+ if (a < 128 && (cmp_flags & CMP_KEEPASCII))
+ return TOLOWER_ASC(a);
+
+#if defined(HAVE_TOWLOWER) && defined(__STDC_ISO_10646__)
+ // If towlower() is available and handles Unicode, use it.
+ if (!(cmp_flags & CMP_INTERNAL))
+ return towlower(a);
+#endif
+
+ // For characters below 128 use locale sensitive tolower().
+ if (a < 128)
+ return TOLOWER_LOC(a);
+
+ // For any other characters use the above mapping table.
+ return utf_convert(a, toLower, (int)sizeof(toLower));
+}
+
+ int
+utf_isupper(int a)
+{
+ return (utf_tolower(a) != a);
+}
+
+ static int
+utf_strnicmp(
+ char_u *s1,
+ char_u *s2,
+ size_t n1,
+ size_t n2)
+{
+ int c1, c2, cdiff;
+ char_u buffer[6];
+
+ for (;;)
+ {
+ c1 = utf_safe_read_char_adv(&s1, &n1);
+ c2 = utf_safe_read_char_adv(&s2, &n2);
+
+ if (c1 <= 0 || c2 <= 0)
+ break;
+
+ if (c1 == c2)
+ continue;
+
+ cdiff = utf_fold(c1) - utf_fold(c2);
+ if (cdiff != 0)
+ return cdiff;
+ }
+
+ // some string ended or has an incomplete/illegal character sequence
+
+ if (c1 == 0 || c2 == 0)
+ {
+ // some string ended. shorter string is smaller
+ if (c1 == 0 && c2 == 0)
+ return 0;
+ return c1 == 0 ? -1 : 1;
+ }
+
+ // Continue with bytewise comparison to produce some result that
+ // would make comparison operations involving this function transitive.
+ //
+ // If only one string had an error, comparison should be made with
+ // folded version of the other string. In this case it is enough
+ // to fold just one character to determine the result of comparison.
+
+ if (c1 != -1 && c2 == -1)
+ {
+ n1 = utf_char2bytes(utf_fold(c1), buffer);
+ s1 = buffer;
+ }
+ else if (c2 != -1 && c1 == -1)
+ {
+ n2 = utf_char2bytes(utf_fold(c2), buffer);
+ s2 = buffer;
+ }
+
+ while (n1 > 0 && n2 > 0 && *s1 != NUL && *s2 != NUL)
+ {
+ cdiff = (int)(*s1) - (int)(*s2);
+ if (cdiff != 0)
+ return cdiff;
+
+ s1++;
+ s2++;
+ n1--;
+ n2--;
+ }
+
+ if (n1 > 0 && *s1 == NUL)
+ n1 = 0;
+ if (n2 > 0 && *s2 == NUL)
+ n2 = 0;
+
+ if (n1 == 0 && n2 == 0)
+ return 0;
+ return n1 == 0 ? -1 : 1;
+}
+
+/*
+ * Version of strnicmp() that handles multi-byte characters.
+ * Needed for Big5, Shift-JIS and UTF-8 encoding. Other DBCS encodings can
+ * probably use strnicmp(), because there are no ASCII characters in the
+ * second byte.
+ * Returns zero if s1 and s2 are equal (ignoring case), the difference between
+ * two characters otherwise.
+ */
+ int
+mb_strnicmp(char_u *s1, char_u *s2, size_t nn)
+{
+ int i, l;
+ int cdiff;
+ int n = (int)nn;
+
+ if (enc_utf8)
+ {
+ return utf_strnicmp(s1, s2, nn, nn);
+ }
+ else
+ {
+ for (i = 0; i < n; i += l)
+ {
+ if (s1[i] == NUL && s2[i] == NUL) // both strings end
+ return 0;
+
+ l = (*mb_ptr2len)(s1 + i);
+ if (l <= 1)
+ {
+ // Single byte: first check normally, then with ignore case.
+ if (s1[i] != s2[i])
+ {
+ cdiff = MB_TOLOWER(s1[i]) - MB_TOLOWER(s2[i]);
+ if (cdiff != 0)
+ return cdiff;
+ }
+ }
+ else
+ {
+ // For non-Unicode multi-byte don't ignore case.
+ if (l > n - i)
+ l = n - i;
+ cdiff = STRNCMP(s1 + i, s2 + i, l);
+ if (cdiff != 0)
+ return cdiff;
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * "g8": show bytes of the UTF-8 char under the cursor. Doesn't matter what
+ * 'encoding' has been set to.
+ */
+ void
+show_utf8(void)
+{
+ int len;
+ int rlen = 0;
+ char_u *line;
+ int clen;
+ int i;
+
+ // Get the byte length of the char under the cursor, including composing
+ // characters.
+ line = ml_get_cursor();
+ len = utfc_ptr2len(line);
+ if (len == 0)
+ {
+ msg("NUL");
+ return;
+ }
+
+ clen = 0;
+ for (i = 0; i < len; ++i)
+ {
+ if (clen == 0)
+ {
+ // start of (composing) character, get its length
+ if (i > 0)
+ {
+ STRCPY(IObuff + rlen, "+ ");
+ rlen += 2;
+ }
+ clen = utf_ptr2len(line + i);
+ }
+ sprintf((char *)IObuff + rlen, "%02x ",
+ (line[i] == NL) ? NUL : line[i]); // NUL is stored as NL
+ --clen;
+ rlen += (int)STRLEN(IObuff + rlen);
+ if (rlen > IOSIZE - 20)
+ break;
+ }
+
+ msg((char *)IObuff);
+}
+
+/*
+ * mb_head_off() function pointer.
+ * Return offset from "p" to the first byte of the character it points into.
+ * If "p" points to the NUL at the end of the string return 0.
+ * Returns 0 when already at the first byte of a character.
+ */
+ int
+latin_head_off(char_u *base UNUSED, char_u *p UNUSED)
+{
+ return 0;
+}
+
+ static int
+dbcs_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+
+ // It can't be a trailing byte when not using DBCS, at the start of the
+ // string or the previous byte can't start a double-byte.
+ if (p <= base || MB_BYTE2LEN(p[-1]) == 1 || *p == NUL)
+ return 0;
+
+ // This is slow: need to start at the base and go forward until the
+ // byte we are looking for. Return 1 when we went past it, 0 otherwise.
+ q = base;
+ while (q < p)
+ q += dbcs_ptr2len(q);
+ return (q == p) ? 0 : 1;
+}
+
+/*
+ * Special version of dbcs_head_off() that works for ScreenLines[], where
+ * single-width DBCS_JPNU characters are stored separately.
+ */
+ int
+dbcs_screen_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+
+ // It can't be a trailing byte when not using DBCS, at the start of the
+ // string or the previous byte can't start a double-byte.
+ // For euc-jp an 0x8e byte in the previous cell always means we have a
+ // lead byte in the current cell.
+ if (p <= base
+ || (enc_dbcs == DBCS_JPNU && p[-1] == 0x8e)
+ || MB_BYTE2LEN(p[-1]) == 1
+ || *p == NUL)
+ return 0;
+
+ // This is slow: need to start at the base and go forward until the
+ // byte we are looking for. Return 1 when we went past it, 0 otherwise.
+ // For DBCS_JPNU look out for 0x8e, which means the second byte is not
+ // stored as the next byte.
+ q = base;
+ while (q < p)
+ {
+ if (enc_dbcs == DBCS_JPNU && *q == 0x8e)
+ ++q;
+ else
+ q += dbcs_ptr2len(q);
+ }
+ return (q == p) ? 0 : 1;
+}
+
+/*
+ * Return offset from "p" to the start of a character, including composing
+ * characters. "base" must be the start of the string, which must be NUL
+ * terminated.
+ */
+ int
+utf_head_off(char_u *base, char_u *p)
+{
+ char_u *q;
+ char_u *s;
+ int c;
+ int len;
+#ifdef FEAT_ARABIC
+ char_u *j;
+#endif
+
+ if (*p < 0x80) // be quick for ASCII
+ return 0;
+
+ // Skip backwards over trailing bytes: 10xx.xxxx
+ // Skip backwards again if on a composing char.
+ for (q = p; ; --q)
+ {
+ // Move s to the last byte of this char.
+ for (s = q; (s[1] & 0xc0) == 0x80; ++s)
+ ;
+ // Move q to the first byte of this char.
+ while (q > base && (*q & 0xc0) == 0x80)
+ --q;
+ // Check for illegal sequence. Do allow an illegal byte after where we
+ // started.
+ len = utf8len_tab[*q];
+ if (len != (int)(s - q + 1) && len != (int)(p - q + 1))
+ return 0;
+
+ if (q <= base)
+ break;
+
+ c = utf_ptr2char(q);
+ if (utf_iscomposing(c))
+ continue;
+
+#ifdef FEAT_ARABIC
+ if (arabic_maycombine(c))
+ {
+ // Advance to get a sneak-peak at the next char
+ j = q;
+ --j;
+ // Move j to the first byte of this char.
+ while (j > base && (*j & 0xc0) == 0x80)
+ --j;
+ if (arabic_combine(utf_ptr2char(j), c))
+ continue;
+ }
+#endif
+ break;
+ }
+
+ return (int)(p - q);
+}
+
+/*
+ * Whether space is NOT allowed before/after 'c'.
+ */
+ int
+utf_eat_space(int cc)
+{
+ return ((cc >= 0x2000 && cc <= 0x206F) // General punctuations
+ || (cc >= 0x2e00 && cc <= 0x2e7f) // Supplemental punctuations
+ || (cc >= 0x3000 && cc <= 0x303f) // CJK symbols and punctuations
+ || (cc >= 0xff01 && cc <= 0xff0f) // Full width ASCII punctuations
+ || (cc >= 0xff1a && cc <= 0xff20) // ..
+ || (cc >= 0xff3b && cc <= 0xff40) // ..
+ || (cc >= 0xff5b && cc <= 0xff65)); // ..
+}
+
+/*
+ * Whether line break is allowed before "cc".
+ */
+ int
+utf_allow_break_before(int cc)
+{
+ static const int BOL_prohibition_punct[] =
+ {
+ '!',
+ '%',
+ ')',
+ ',',
+ ':',
+ ';',
+ '>',
+ '?',
+ ']',
+ '}',
+ 0x2019, // ’ right single quotation mark
+ 0x201d, // ” right double quotation mark
+ 0x2020, // † dagger
+ 0x2021, // ‡ double dagger
+ 0x2026, // … horizontal ellipsis
+ 0x2030, // ‰ per mille sign
+ 0x2031, // ‱ per then thousand sign
+ 0x203c, // ‼ double exclamation mark
+ 0x2047, // ⁇ double question mark
+ 0x2048, // ⁈ question exclamation mark
+ 0x2049, // ⁉ exclamation question mark
+ 0x2103, // ℃ degree celsius
+ 0x2109, // ℉ degree fahrenheit
+ 0x3001, // 、 ideographic comma
+ 0x3002, // 。 ideographic full stop
+ 0x3009, // 〉 right angle bracket
+ 0x300b, // 》 right double angle bracket
+ 0x300d, // 」 right corner bracket
+ 0x300f, // 』 right white corner bracket
+ 0x3011, // 】 right black lenticular bracket
+ 0x3015, // 〕 right tortoise shell bracket
+ 0x3017, // 〗 right white lenticular bracket
+ 0x3019, // 〙 right white tortoise shell bracket
+ 0x301b, // 〛 right white square bracket
+ 0xff01, // ！ fullwidth exclamation mark
+ 0xff09, // ） fullwidth right parenthesis
+ 0xff0c, // ， fullwidth comma
+ 0xff0e, // ． fullwidth full stop
+ 0xff1a, // ： fullwidth colon
+ 0xff1b, // ； fullwidth semicolon
+ 0xff1f, // ？ fullwidth question mark
+ 0xff3d, // ］ fullwidth right square bracket
+ 0xff5d, // ｝ fullwidth right curly bracket
+ };
+
+ int first = 0;
+ int last = ARRAY_LENGTH(BOL_prohibition_punct) - 1;
+ int mid = 0;
+
+ while (first < last)
+ {
+ mid = (first + last)/2;
+
+ if (cc == BOL_prohibition_punct[mid])
+ return FALSE;
+ else if (cc > BOL_prohibition_punct[mid])
+ first = mid + 1;
+ else
+ last = mid - 1;
+ }
+
+ return cc != BOL_prohibition_punct[first];
+}
+
+/*
+ * Whether line break is allowed after "cc".
+ */
+ static int
+utf_allow_break_after(int cc)
+{
+ static const int EOL_prohibition_punct[] =
+ {
+ '(',
+ '<',
+ '[',
+ '`',
+ '{',
+ //0x2014, // — em dash
+ 0x2018, // ‘ left single quotation mark
+ 0x201c, // “ left double quotation mark
+ //0x2053, // ～ swung dash
+ 0x3008, // 〈 left angle bracket
+ 0x300a, // 《 left double angle bracket
+ 0x300c, // 「 left corner bracket
+ 0x300e, // 『 left white corner bracket
+ 0x3010, // 【 left black lenticular bracket
+ 0x3014, // 〔 left tortoise shell bracket
+ 0x3016, // 〖 left white lenticular bracket
+ 0x3018, // 〘 left white tortoise shell bracket
+ 0x301a, // 〚 left white square bracket
+ 0xff08, // （ fullwidth left parenthesis
+ 0xff3b, // ［ fullwidth left square bracket
+ 0xff5b, // ｛ fullwidth left curly bracket
+ };
+
+ int first = 0;
+ int last = ARRAY_LENGTH(EOL_prohibition_punct) - 1;
+ int mid = 0;
+
+ while (first < last)
+ {
+ mid = (first + last)/2;
+
+ if (cc == EOL_prohibition_punct[mid])
+ return FALSE;
+ else if (cc > EOL_prohibition_punct[mid])
+ first = mid + 1;
+ else
+ last = mid - 1;
+ }
+
+ return cc != EOL_prohibition_punct[first];
+}
+
+/*
+ * Whether line break is allowed between "cc" and "ncc".
+ */
+ int
+utf_allow_break(int cc, int ncc)
+{
+ // don't break between two-letter punctuations
+ if (cc == ncc
+ && (cc == 0x2014 // em dash
+ || cc == 0x2026)) // horizontal ellipsis
+ return FALSE;
+
+ return utf_allow_break_after(cc) && utf_allow_break_before(ncc);
+}
+
+/*
+ * Copy a character from "*fp" to "*tp" and advance the pointers.
+ */
+ void
+mb_copy_char(char_u **fp, char_u **tp)
+{
+ int l = (*mb_ptr2len)(*fp);
+
+ mch_memmove(*tp, *fp, (size_t)l);
+ *tp += l;
+ *fp += l;
+}
+
+/*
+ * Return the offset from "p" to the first byte of a character. When "p" is
+ * at the start of a character 0 is returned, otherwise the offset to the next
+ * character. Can start anywhere in a stream of bytes.
+ */
+ int
+mb_off_next(char_u *base, char_u *p)
+{
+ int i;
+ int j;
+
+ if (enc_utf8)
+ {
+ if (*p < 0x80) // be quick for ASCII
+ return 0;
+
+ // Find the next character that isn't 10xx.xxxx
+ for (i = 0; (p[i] & 0xc0) == 0x80; ++i)
+ ;
+ if (i > 0)
+ {
+ // Check for illegal sequence.
+ for (j = 0; p - j > base; ++j)
+ if ((p[-j] & 0xc0) != 0x80)
+ break;
+ if (utf8len_tab[p[-j]] != i + j)
+ return 0;
+ }
+ return i;
+ }
+
+ // Only need to check if we're on a trail byte, it doesn't matter if we
+ // want the offset to the next or current character.
+ return (*mb_head_off)(base, p);
+}
+
+/*
+ * Return the offset from "p" to the last byte of the character it points
+ * into. Can start anywhere in a stream of bytes.
+ * Composing characters are not included.
+ */
+ int
+mb_tail_off(char_u *base, char_u *p)
+{
+ int i;
+ int j;
+
+ if (*p == NUL)
+ return 0;
+
+ if (enc_utf8)
+ {
+ // Find the last character that is 10xx.xxxx
+ for (i = 0; (p[i + 1] & 0xc0) == 0x80; ++i)
+ ;
+ // Check for illegal sequence.
+ for (j = 0; p - j > base; ++j)
+ if ((p[-j] & 0xc0) != 0x80)
+ break;
+ if (utf8len_tab[p[-j]] != i + j + 1)
+ return 0;
+ return i;
+ }
+
+ // It can't be the first byte if a double-byte when not using DBCS, at the
+ // end of the string or the byte can't start a double-byte.
+ if (enc_dbcs == 0 || p[1] == NUL || MB_BYTE2LEN(*p) == 1)
+ return 0;
+
+ // Return 1 when on the lead byte, 0 when on the tail byte.
+ return 1 - dbcs_head_off(base, p);
+}
+
+/*
+ * Find the next illegal byte sequence.
+ */
+ void
+utf_find_illegal(void)
+{
+ pos_T pos = curwin->w_cursor;
+ char_u *p;
+ int len;
+ vimconv_T vimconv;
+ char_u *tofree = NULL;
+
+ vimconv.vc_type = CONV_NONE;
+ if (enc_utf8 && (enc_canon_props(curbuf->b_p_fenc) & ENC_8BIT))
+ {
+ // 'encoding' is "utf-8" but we are editing a 8-bit encoded file,
+ // possibly a utf-8 file with illegal bytes. Setup for conversion
+ // from utf-8 to 'fileencoding'.
+ convert_setup(&vimconv, p_enc, curbuf->b_p_fenc);
+ }
+
+ curwin->w_cursor.coladd = 0;
+ for (;;)
+ {
+ p = ml_get_cursor();
+ if (vimconv.vc_type != CONV_NONE)
+ {
+ vim_free(tofree);
+ tofree = string_convert(&vimconv, p, NULL);
+ if (tofree == NULL)
+ break;
+ p = tofree;
+ }
+
+ while (*p != NUL)
+ {
+ // Illegal means that there are not enough trail bytes (checked by
+ // utf_ptr2len()) or too many of them (overlong sequence).
+ len = utf_ptr2len(p);
+ if (*p >= 0x80 && (len == 1
+ || utf_char2len(utf_ptr2char(p)) != len))
+ {
+ if (vimconv.vc_type == CONV_NONE)
+ curwin->w_cursor.col += (colnr_T)(p - ml_get_cursor());
+ else
+ {
+ int l;
+
+ len = (int)(p - tofree);
+ for (p = ml_get_cursor(); *p != NUL && len-- > 0; p += l)
+ {
+ l = utf_ptr2len(p);
+ curwin->w_cursor.col += l;
+ }
+ }
+ goto theend;
+ }
+ p += len;
+ }
+ if (curwin->w_cursor.lnum == curbuf->b_ml.ml_line_count)
+ break;
+ ++curwin->w_cursor.lnum;
+ curwin->w_cursor.col = 0;
+ }
+
+ // didn't find it: don't move and beep
+ curwin->w_cursor = pos;
+ beep_flush();
+
+theend:
+ vim_free(tofree);
+ convert_setup(&vimconv, NULL, NULL);
+}
+
+#if defined(FEAT_GUI_GTK) || defined(FEAT_SPELL) || defined(PROTO)
+/*
+ * Return TRUE if string "s" is a valid utf-8 string.
+ * When "end" is NULL stop at the first NUL. Otherwise stop at "end".
+ */
+ int
+utf_valid_string(char_u *s, char_u *end)
+{
+ int l;
+ char_u *p = s;
+
+ while (end == NULL ? *p != NUL : p < end)
+ {
+ l = utf8len_tab_zero[*p];
+ if (l == 0)
+ return FALSE; // invalid lead byte
+ if (end != NULL && p + l > end)
+ return FALSE; // incomplete byte sequence
+ ++p;
+ while (--l > 0)
+ if ((*p++ & 0xc0) != 0x80)
+ return FALSE; // invalid trail byte
+ }
+ return TRUE;
+}
+#endif
+
+#if defined(FEAT_GUI) || defined(PROTO)
+/*
+ * Special version of mb_tail_off() for use in ScreenLines[].
+ */
+ int
+dbcs_screen_tail_off(char_u *base, char_u *p)
+{
+ // It can't be the first byte if a double-byte when not using DBCS, at the
+ // end of the string or the byte can't start a double-byte.
+ // For euc-jp an 0x8e byte always means we have a lead byte in the current
+ // cell.
+ if (*p == NUL || p[1] == NUL
+ || (enc_dbcs == DBCS_JPNU && *p == 0x8e)
+ || MB_BYTE2LEN(*p) == 1)
+ return 0;
+
+ // Return 1 when on the lead byte, 0 when on the tail byte.
+ return 1 - dbcs_screen_head_off(base, p);
+}
+#endif
+
+/*
+ * If the cursor moves on an trail byte, set the cursor on the lead byte.
+ * Thus it moves left if necessary.
+ * Return TRUE when the cursor was adjusted.
+ */
+ void
+mb_adjust_cursor(void)
+{
+ mb_adjustpos(curbuf, &curwin->w_cursor);
+}
+
+/*
+ * Adjust position "*lp" to point to the first byte of a multi-byte character.
+ * If it points to a tail byte it's moved backwards to the head byte.
+ */
+ void
+mb_adjustpos(buf_T *buf, pos_T *lp)
+{
+ char_u *p;
+
+ if (lp->col > 0 || lp->coladd > 1)
+ {
+ p = ml_get_buf(buf, lp->lnum, FALSE);
+ if (*p == NUL || (int)STRLEN(p) < lp->col)
+ lp->col = 0;
+ else
+ lp->col -= (*mb_head_off)(p, p + lp->col);
+ // Reset "coladd" when the cursor would be on the right half of a
+ // double-wide character.
+ if (lp->coladd == 1
+ && p[lp->col] != TAB
+ && vim_isprintc((*mb_ptr2char)(p + lp->col))
+ && ptr2cells(p + lp->col) > 1)
+ lp->coladd = 0;
+ }
+}
+
+/*
+ * Return a pointer to the character before "*p", if there is one.
+ */
+ char_u *
+mb_prevptr(
+ char_u *line, // start of the string
+ char_u *p)
+{
+ if (p > line)
+ MB_PTR_BACK(line, p);
+ return p;
+}
+
+/*
+ * Return the character length of "str". Each multi-byte character (with
+ * following composing characters) counts as one.
+ */
+ int
+mb_charlen(char_u *str)
+{
+ char_u *p = str;
+ int count;
+
+ if (p == NULL)
+ return 0;
+
+ for (count = 0; *p != NUL; count++)
+ p += (*mb_ptr2len)(p);
+
+ return count;
+}
+
+/*
+ * Like mb_charlen() but for a string with specified length.
+ */
+ int
+mb_charlen_len(char_u *str, int len)
+{
+ char_u *p = str;
+ int count;
+
+ for (count = 0; *p != NUL && p < str + len; count++)
+ p += (*mb_ptr2len)(p);
+
+ return count;
+}
+
+/*
+ * Try to un-escape a multi-byte character.
+ * Used for the "to" and "from" part of a mapping.
+ * Return the un-escaped string if it is a multi-byte character, and advance
+ * "pp" to just after the bytes that formed it.
+ * Return NULL if no multi-byte char was found.
+ */
+ char_u *
+mb_unescape(char_u **pp)
+{
+ static char_u buf[6];
+ int n;
+ int m = 0;
+ char_u *str = *pp;
+
+ // Must translate K_SPECIAL KS_SPECIAL KE_FILLER to K_SPECIAL and CSI
+ // KS_EXTRA KE_CSI to CSI.
+ // Maximum length of a utf-8 character is 4 bytes.
+ for (n = 0; str[n] != NUL && m < 4; ++n)
+ {
+ if (str[n] == K_SPECIAL
+ && str[n + 1] == KS_SPECIAL
+ && str[n + 2] == KE_FILLER)
+ {
+ buf[m++] = K_SPECIAL;
+ n += 2;
+ }
+ else if ((str[n] == K_SPECIAL
+# ifdef FEAT_GUI
+ || str[n] == CSI
+# endif
+ )
+ && str[n + 1] == KS_EXTRA
+ && str[n + 2] == (int)KE_CSI)
+ {
+ buf[m++] = CSI;
+ n += 2;
+ }
+ else if (str[n] == K_SPECIAL
+# ifdef FEAT_GUI
+ || str[n] == CSI
+# endif
+ )
+ break; // a special key can't be a multibyte char
+ else
+ buf[m++] = str[n];
+ buf[m] = NUL;
+
+ // Return a multi-byte character if it's found. An illegal sequence
+ // will result in a 1 here.
+ if ((*mb_ptr2len)(buf) > 1)
+ {
+ *pp = str + n + 1;
+ return buf;
+ }
+
+ // Bail out quickly for ASCII.
+ if (buf[0] < 128)
+ break;
+ }
+ return NULL;
+}
+
+/*
+ * Return TRUE if the character at "row"/"col" on the screen is the left side
+ * of a double-width character.
+ * Caller must make sure "row" and "col" are not invalid!
+ */
+ int
+mb_lefthalve(int row, int col)
+{
+ return (*mb_off2cells)(LineOffset[row] + col,
+ LineOffset[row] + screen_Columns) > 1;
+}
+
+/*
+ * Correct a position on the screen, if it's the right half of a double-wide
+ * char move it to the left half. Returns the corrected column.
+ */
+ int
+mb_fix_col(int col, int row)
+{
+ int off;
+
+ col = check_col(col);
+ row = check_row(row);
+ off = LineOffset[row] + col;
+ if (has_mbyte && ScreenLines != NULL && col > 0
+ && ((enc_dbcs
+ && ScreenLines[off] != NUL
+ && dbcs_screen_head_off(ScreenLines + LineOffset[row],
+ ScreenLines + off))
+ || (enc_utf8 && ScreenLines[off] == 0
+ && ScreenLinesUC[off] == 0)))
+ return col - 1;
+ return col;
+}
+
+static int enc_alias_search(char_u *name);
+
+/*
+ * Skip the Vim specific head of a 'encoding' name.
+ */
+ char_u *
+enc_skip(char_u *p)
+{
+ if (STRNCMP(p, "2byte-", 6) == 0)
+ return p + 6;
+ if (STRNCMP(p, "8bit-", 5) == 0)
+ return p + 5;
+ return p;
+}
+
+/*
+ * Find the canonical name for encoding "enc".
+ * When the name isn't recognized, returns "enc" itself, but with all lower
+ * case characters and '_' replaced with '-'.
+ * Returns an allocated string. NULL for out-of-memory.
+ */
+ char_u *
+enc_canonize(char_u *enc)
+{
+ char_u *r;
+ char_u *p, *s;
+ int i;
+
+ if (STRCMP(enc, "default") == 0)
+ {
+#ifdef MSWIN
+ // Use the system encoding, the default is always utf-8.
+ r = enc_locale();
+#else
+ // Use the default encoding as it's found by set_init_1().
+ r = get_encoding_default();
+#endif
+ if (r == NULL)
+ r = (char_u *)ENC_DFLT;
+ return vim_strsave(r);
+ }
+
+ // copy "enc" to allocated memory, with room for two '-'
+ r = alloc(STRLEN(enc) + 3);
+ if (r == NULL)
+ return NULL;
+
+ // Make it all lower case and replace '_' with '-'.
+ p = r;
+ for (s = enc; *s != NUL; ++s)
+ {
+ if (*s == '_')
+ *p++ = '-';
+ else
+ *p++ = TOLOWER_ASC(*s);
+ }
+ *p = NUL;
+
+ // Skip "2byte-" and "8bit-".
+ p = enc_skip(r);
+
+ // Change "microsoft-cp" to "cp". Used in some spell files.
+ if (STRNCMP(p, "microsoft-cp", 12) == 0)
+ STRMOVE(p, p + 10);
+
+ // "iso8859" -> "iso-8859"
+ if (STRNCMP(p, "iso8859", 7) == 0)
+ {
+ STRMOVE(p + 4, p + 3);
+ p[3] = '-';
+ }
+
+ // "iso-8859n" -> "iso-8859-n"
+ if (STRNCMP(p, "iso-8859", 8) == 0 && isdigit(p[8]))
+ {
+ STRMOVE(p + 9, p + 8);
+ p[8] = '-';
+ }
+
+ // "latin-N" -> "latinN"
+ if (STRNCMP(p, "latin-", 6) == 0)
+ STRMOVE(p + 5, p + 6);
+
+ if (enc_canon_search(p) >= 0)
+ {
+ // canonical name can be used unmodified
+ if (p != r)
+ STRMOVE(r, p);
+ }
+ else if ((i = enc_alias_search(p)) >= 0)
+ {
+ // alias recognized, get canonical name
+ vim_free(r);
+ r = vim_strsave((char_u *)enc_canon_table[i].name);
+ }
+ return r;
+}
+
+/*
+ * Search for an encoding alias of "name".
+ * Returns -1 when not found.
+ */
+ static int
+enc_alias_search(char_u *name)
+{
+ int i;
+
+ for (i = 0; enc_alias_table[i].name != NULL; ++i)
+ if (STRCMP(name, enc_alias_table[i].name) == 0)
+ return enc_alias_table[i].canon;
+ return -1;
+}
+
+
+#ifdef HAVE_LANGINFO_H
+# include <langinfo.h>
+#endif
+
+#if !defined(FEAT_GUI_MSWIN) || defined(VIMDLL)
+/*
+ * Get the canonicalized encoding from the specified locale string "locale"
+ * or from the environment variables LC_ALL, LC_CTYPE and LANG.
+ * Returns an allocated string when successful, NULL when not.
+ */
+ char_u *
+enc_locale_env(char *locale)
+{
+ char *s = locale;
+ char *p;
+ int i;
+ char buf[50];
+
+ if (s == NULL || *s == NUL)
+ if ((s = getenv("LC_ALL")) == NULL || *s == NUL)
+ if ((s = getenv("LC_CTYPE")) == NULL || *s == NUL)
+ s = getenv("LANG");
+
+ if (s == NULL || *s == NUL)
+ return NULL;
+
+ // The most generic locale format is:
+ // language[_territory][.codeset][@modifier][+special][,[sponsor][_revision]]
+ // If there is a '.' remove the part before it.
+ // if there is something after the codeset, remove it.
+ // Make the name lowercase and replace '_' with '-'.
+ // Exception: "ja_JP.EUC" == "euc-jp", "zh_CN.EUC" = "euc-cn",
+ // "ko_KR.EUC" == "euc-kr"
+ if ((p = (char *)vim_strchr((char_u *)s, '.')) != NULL)
+ {
+ if (p > s + 2 && STRNICMP(p + 1, "EUC", 3) == 0
+ && !isalnum((int)p[4]) && p[4] != '-' && p[-3] == '_')
+ {
+ // copy "XY.EUC" to "euc-XY" to buf[10]
+ STRCPY(buf + 10, "euc-");
+ buf[14] = p[-2];
+ buf[15] = p[-1];
+ buf[16] = 0;
+ s = buf + 10;
+ }
+ else
+ s = p + 1;
+ }
+ for (i = 0; i < (int)sizeof(buf) - 1 && s[i] != NUL; ++i)
+ {
+ if (s[i] == '_' || s[i] == '-')
+ buf[i] = '-';
+ else if (isalnum((int)s[i]))
+ buf[i] = TOLOWER_ASC(s[i]);
+ else
+ break;
+ }
+ buf[i] = NUL;
+
+ return enc_canonize((char_u *)buf);
+}
+#endif
+
+/*
+ * Get the canonicalized encoding of the current locale.
+ * Returns an allocated string when successful, NULL when not.
+ */
+ char_u *
+enc_locale(void)
+{
+#ifdef MSWIN
+ char buf[50];
+ long acp = GetACP();
+
+ if (acp == 1200)
+ STRCPY(buf, "ucs-2le");
+ else if (acp == 1252) // cp1252 is used as latin1
+ STRCPY(buf, "latin1");
+ else if (acp == 65001)
+ STRCPY(buf, "utf-8");
+ else
+ sprintf(buf, "cp%ld", acp);
+
+ return enc_canonize((char_u *)buf);
+#else
+ char *s;
+
+# ifdef HAVE_NL_LANGINFO_CODESET
+ if ((s = nl_langinfo(CODESET)) == NULL || *s == NUL)
+# endif
+# if defined(HAVE_LOCALE_H) || defined(X_LOCALE)
+ if ((s = setlocale(LC_CTYPE, NULL)) == NULL || *s == NUL)
+# endif
+ s = NULL;
+
+ return enc_locale_env(s);
+#endif
+}
+
+# if defined(MSWIN) || defined(PROTO) || defined(FEAT_CYGWIN_WIN32_CLIPBOARD)
+/*
+ * Convert an encoding name to an MS-Windows codepage.
+ * Returns zero if no codepage can be figured out.
+ */
+ int
+encname2codepage(char_u *name)
+{
+ int cp;
+ char_u *p = name;
+ int idx;
+
+ if (STRNCMP(p, "8bit-", 5) == 0)
+ p += 5;
+ else if (STRNCMP(p_enc, "2byte-", 6) == 0)
+ p += 6;
+
+ if (p[0] == 'c' && p[1] == 'p')
+ cp = atoi((char *)p + 2);
+ else if ((idx = enc_canon_search(p)) >= 0)
+ cp = enc_canon_table[idx].codepage;
+ else
+ return 0;
+ if (IsValidCodePage(cp))
+ return cp;
+ return 0;
+}
+# endif
+
+# if defined(USE_ICONV) || defined(PROTO)
+
+/*
+ * Call iconv_open() with a check if iconv() works properly (there are broken
+ * versions).
+ * Returns (void *)-1 if failed.
+ * (should return iconv_t, but that causes problems with prototypes).
+ */
+ void *
+my_iconv_open(char_u *to, char_u *from)
+{
+ iconv_t fd;
+#define ICONV_TESTLEN 400
+ char_u tobuf[ICONV_TESTLEN];
+ char *p;
+ size_t tolen;
+ static int iconv_ok = -1;
+
+ if (iconv_ok == FALSE)
+ return (void *)-1; // detected a broken iconv() previously
+
+#ifdef DYNAMIC_ICONV
+ // Check if the iconv.dll can be found.
+ if (!iconv_enabled(TRUE))
+ return (void *)-1;
+#endif
+
+ fd = iconv_open((char *)enc_skip(to), (char *)enc_skip(from));
+
+ if (fd != (iconv_t)-1 && iconv_ok == -1)
+ {
+ /*
+ * Do a dummy iconv() call to check if it actually works. There is a
+ * version of iconv() on Linux that is broken. We can't ignore it,
+ * because it's wide-spread. The symptoms are that after outputting
+ * the initial shift state the "to" pointer is NULL and conversion
+ * stops for no apparent reason after about 8160 characters.
+ */
+ p = (char *)tobuf;
+ tolen = ICONV_TESTLEN;
+ (void)iconv(fd, NULL, NULL, &p, &tolen);
+ if (p == NULL)
+ {
+ iconv_ok = FALSE;
+ iconv_close(fd);
+ fd = (iconv_t)-1;
+ }
+ else
+ iconv_ok = TRUE;
+ }
+
+ return (void *)fd;
+}
+
+/*
+ * Convert the string "str[slen]" with iconv().
+ * If "unconvlenp" is not NULL handle the string ending in an incomplete
+ * sequence and set "*unconvlenp" to the length of it.
+ * Returns the converted string in allocated memory. NULL for an error.
+ * If resultlenp is not NULL, sets it to the result length in bytes.
+ */
+ static char_u *
+iconv_string(
+ vimconv_T *vcp,
+ char_u *str,
+ int slen,
+ int *unconvlenp,
+ int *resultlenp)
+{
+ const char *from;
+ size_t fromlen;
+ char *to;
+ size_t tolen;
+ size_t len = 0;
+ size_t done = 0;
+ char_u *result = NULL;
+ char_u *p;
+ int l;
+
+ from = (char *)str;
+ fromlen = slen;
+ for (;;)
+ {
+ if (len == 0 || ICONV_ERRNO == ICONV_E2BIG)
+ {
+ // Allocate enough room for most conversions. When re-allocating
+ // increase the buffer size.
+ len = len + fromlen * 2 + 40;
+ p = alloc(len);
+ if (p != NULL && done > 0)
+ mch_memmove(p, result, done);
+ vim_free(result);
+ result = p;
+ if (result == NULL) // out of memory
+ break;
+ }
+
+ to = (char *)result + done;
+ tolen = len - done - 2;
+ // Avoid a warning for systems with a wrong iconv() prototype by
+ // casting the second argument to void *.
+ if (iconv(vcp->vc_fd, (void *)&from, &fromlen, &to, &tolen)
+ != (size_t)-1)
+ {
+ // Finished, append a NUL.
+ *to = NUL;
+ break;
+ }
+
+ // Check both ICONV_EINVAL and EINVAL, because the dynamically loaded
+ // iconv library may use one of them.
+ if (!vcp->vc_fail && unconvlenp != NULL
+ && (ICONV_ERRNO == ICONV_EINVAL || ICONV_ERRNO == EINVAL))
+ {
+ // Handle an incomplete sequence at the end.
+ *to = NUL;
+ *unconvlenp = (int)fromlen;
+ break;
+ }
+
+ // Check both ICONV_EILSEQ and EILSEQ, because the dynamically loaded
+ // iconv library may use one of them.
+ else if (!vcp->vc_fail
+ && (ICONV_ERRNO == ICONV_EILSEQ || ICONV_ERRNO == EILSEQ
+ || ICONV_ERRNO == ICONV_EINVAL || ICONV_ERRNO == EINVAL))
+ {
+ // Can't convert: insert a '?' and skip a character. This assumes
+ // conversion from 'encoding' to something else. In other
+ // situations we don't know what to skip anyway.
+ *to++ = '?';
+ if ((*mb_ptr2cells)((char_u *)from) > 1)
+ *to++ = '?';
+ if (enc_utf8)
+ l = utfc_ptr2len_len((char_u *)from, (int)fromlen);
+ else
+ {
+ l = (*mb_ptr2len)((char_u *)from);
+ if (l > (int)fromlen)
+ l = (int)fromlen;
+ }
+ from += l;
+ fromlen -= l;
+ }
+ else if (ICONV_ERRNO != ICONV_E2BIG)
+ {
+ // conversion failed
+ VIM_CLEAR(result);
+ break;
+ }
+ // Not enough room or skipping illegal sequence.
+ done = to - (char *)result;
+ }
+
+ if (resultlenp != NULL && result != NULL)
+ *resultlenp = (int)(to - (char *)result);
+ return result;
+}
+
+# if defined(DYNAMIC_ICONV) || defined(PROTO)
+/*
+ * Dynamically load the "iconv.dll" on Win32.
+ */
+
+# ifndef DYNAMIC_ICONV // must be generating prototypes
+# define HINSTANCE int
+# endif
+static HINSTANCE hIconvDLL = 0;
+static HINSTANCE hMsvcrtDLL = 0;
+
+# ifndef DYNAMIC_ICONV_DLL
+# define DYNAMIC_ICONV_DLL "iconv.dll"
+# define DYNAMIC_ICONV_DLL_ALT1 "libiconv.dll"
+# define DYNAMIC_ICONV_DLL_ALT2 "libiconv2.dll"
+# define DYNAMIC_ICONV_DLL_ALT3 "libiconv-2.dll"
+# endif
+# ifndef DYNAMIC_MSVCRT_DLL
+# define DYNAMIC_MSVCRT_DLL "msvcrt.dll"
+# endif
+
+/*
+ * Try opening the iconv.dll and return TRUE if iconv() can be used.
+ */
+ int
+iconv_enabled(int verbose)
+{
+ if (hIconvDLL != 0 && hMsvcrtDLL != 0)
+ return TRUE;
+
+ // The iconv DLL file goes under different names, try them all.
+ // Do the "2" version first, it's newer.
+#ifdef DYNAMIC_ICONV_DLL_ALT2
+ if (hIconvDLL == 0)
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL_ALT2);
+#endif
+#ifdef DYNAMIC_ICONV_DLL_ALT3
+ if (hIconvDLL == 0)
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL_ALT3);
+#endif
+ if (hIconvDLL == 0)
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL);
+#ifdef DYNAMIC_ICONV_DLL_ALT1
+ if (hIconvDLL == 0)
+ hIconvDLL = vimLoadLib(DYNAMIC_ICONV_DLL_ALT1);
+#endif
+
+ if (hIconvDLL != 0)
+ hMsvcrtDLL = vimLoadLib(DYNAMIC_MSVCRT_DLL);
+ if (hIconvDLL == 0 || hMsvcrtDLL == 0)
+ {
+ // Only give the message when 'verbose' is set, otherwise it might be
+ // done whenever a conversion is attempted.
+ if (verbose && p_verbose > 0)
+ {
+ verbose_enter();
+ semsg(_(e_could_not_load_library_str_str),
+ hIconvDLL == 0 ? DYNAMIC_ICONV_DLL : DYNAMIC_MSVCRT_DLL,
+ GetWin32Error());
+ verbose_leave();
+ }
+ iconv_end();
+ return FALSE;
+ }
+
+ iconv = (size_t (*)(iconv_t, const char **,
+ size_t *, char **, size_t *))
+ GetProcAddress(hIconvDLL, "libiconv");
+ iconv_open = (iconv_t (*)(const char *, const char *))
+ GetProcAddress(hIconvDLL, "libiconv_open");
+ iconv_close = (int (*)(iconv_t))
+ GetProcAddress(hIconvDLL, "libiconv_close");
+ iconvctl = (int (*)(iconv_t, int, void *))
+ GetProcAddress(hIconvDLL, "libiconvctl");
+ iconv_errno = (int *(*)(void))get_dll_import_func(hIconvDLL, "_errno");
+ if (iconv_errno == NULL)
+ iconv_errno = (int *(*)(void))GetProcAddress(hMsvcrtDLL, "_errno");
+ if (iconv == NULL || iconv_open == NULL || iconv_close == NULL
+ || iconvctl == NULL || iconv_errno == NULL)
+ {
+ iconv_end();
+ if (verbose && p_verbose > 0)
+ {
+ verbose_enter();
+ semsg(_(e_could_not_load_library_function_str), "for libiconv");
+ verbose_leave();
+ }
+ return FALSE;
+ }
+ return TRUE;
+}
+
+ void
+iconv_end(void)
+{
+ // Don't use iconv() when inputting or outputting characters.
+ if (input_conv.vc_type == CONV_ICONV)
+ convert_setup(&input_conv, NULL, NULL);
+ if (output_conv.vc_type == CONV_ICONV)
+ convert_setup(&output_conv, NULL, NULL);
+
+ if (hIconvDLL != 0)
+ FreeLibrary(hIconvDLL);
+ if (hMsvcrtDLL != 0)
+ FreeLibrary(hMsvcrtDLL);
+ hIconvDLL = 0;
+ hMsvcrtDLL = 0;
+}
+# endif // DYNAMIC_ICONV
+# endif // USE_ICONV
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+/*
+ * "getimstatus()" function
+ */
+ void
+f_getimstatus(typval_T *argvars UNUSED, typval_T *rettv)
+{
+# if defined(HAVE_INPUT_METHOD)
+ rettv->vval.v_number = im_get_status();
+# endif
+}
+
+/*
+ * iconv() function
+ */
+ void
+f_iconv(typval_T *argvars UNUSED, typval_T *rettv)
+{
+ char_u buf1[NUMBUFLEN];
+ char_u buf2[NUMBUFLEN];
+ char_u *from, *to, *str;
+ vimconv_T vimconv;
+
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
+
+ if (in_vim9script()
+ && (check_for_string_arg(argvars, 0) == FAIL
+ || check_for_string_arg(argvars, 1) == FAIL
+ || check_for_string_arg(argvars, 2) == FAIL))
+ return;
+
+ str = tv_get_string(&argvars[0]);
+ from = enc_canonize(enc_skip(tv_get_string_buf(&argvars[1], buf1)));
+ to = enc_canonize(enc_skip(tv_get_string_buf(&argvars[2], buf2)));
+ vimconv.vc_type = CONV_NONE;
+ convert_setup(&vimconv, from, to);
+
+ // If the encodings are equal, no conversion needed.
+ if (vimconv.vc_type == CONV_NONE)
+ rettv->vval.v_string = vim_strsave(str);
+ else
+ rettv->vval.v_string = string_convert(&vimconv, str, NULL);
+
+ convert_setup(&vimconv, NULL, NULL);
+ vim_free(from);
+ vim_free(to);
+}
+#endif
+
+/*
+ * Setup "vcp" for conversion from "from" to "to".
+ * The names must have been made canonical with enc_canonize().
+ * vcp->vc_type must have been initialized to CONV_NONE.
+ * Note: cannot be used for conversion from/to ucs-2 and ucs-4 (will use utf-8
+ * instead).
+ * Afterwards invoke with "from" and "to" equal to NULL to cleanup.
+ * Return FAIL when conversion is not supported, OK otherwise.
+ */
+ int
+convert_setup(vimconv_T *vcp, char_u *from, char_u *to)
+{
+ return convert_setup_ext(vcp, from, TRUE, to, TRUE);
+}
+
+/*
+ * As convert_setup(), but only when from_unicode_is_utf8 is TRUE will all
+ * "from" unicode charsets be considered utf-8. Same for "to".
+ */
+ int
+convert_setup_ext(
+ vimconv_T *vcp,
+ char_u *from,
+ int from_unicode_is_utf8,
+ char_u *to,
+ int to_unicode_is_utf8)
+{
+ int from_prop;
+ int to_prop;
+ int from_is_utf8;
+ int to_is_utf8;
+
+ // Reset to no conversion.
+#ifdef USE_ICONV
+ if (vcp->vc_type == CONV_ICONV && vcp->vc_fd != (iconv_t)-1)
+ iconv_close(vcp->vc_fd);
+#endif
+ vcp->vc_type = CONV_NONE;
+ vcp->vc_factor = 1;
+ vcp->vc_fail = FALSE;
+
+ // No conversion when one of the names is empty or they are equal.
+ if (from == NULL || *from == NUL || to == NULL || *to == NUL
+ || STRCMP(from, to) == 0)
+ return OK;
+
+ from_prop = enc_canon_props(from);
+ to_prop = enc_canon_props(to);
+ if (from_unicode_is_utf8)
+ from_is_utf8 = from_prop & ENC_UNICODE;
+ else
+ from_is_utf8 = from_prop == ENC_UNICODE;
+ if (to_unicode_is_utf8)
+ to_is_utf8 = to_prop & ENC_UNICODE;
+ else
+ to_is_utf8 = to_prop == ENC_UNICODE;
+
+ if ((from_prop & ENC_LATIN1) && to_is_utf8)
+ {
+ // Internal latin1 -> utf-8 conversion.
+ vcp->vc_type = CONV_TO_UTF8;
+ vcp->vc_factor = 2; // up to twice as long
+ }
+ else if ((from_prop & ENC_LATIN9) && to_is_utf8)
+ {
+ // Internal latin9 -> utf-8 conversion.
+ vcp->vc_type = CONV_9_TO_UTF8;
+ vcp->vc_factor = 3; // up to three as long (euro sign)
+ }
+ else if (from_is_utf8 && (to_prop & ENC_LATIN1))
+ {
+ // Internal utf-8 -> latin1 conversion.
+ vcp->vc_type = CONV_TO_LATIN1;
+ }
+ else if (from_is_utf8 && (to_prop & ENC_LATIN9))
+ {
+ // Internal utf-8 -> latin9 conversion.
+ vcp->vc_type = CONV_TO_LATIN9;
+ }
+#ifdef MSWIN
+ // Win32-specific codepage <-> codepage conversion without iconv.
+ else if ((from_is_utf8 || encname2codepage(from) > 0)
+ && (to_is_utf8 || encname2codepage(to) > 0))
+ {
+ vcp->vc_type = CONV_CODEPAGE;
+ vcp->vc_factor = 2; // up to twice as long
+ vcp->vc_cpfrom = from_is_utf8 ? 0 : encname2codepage(from);
+ vcp->vc_cpto = to_is_utf8 ? 0 : encname2codepage(to);
+ }
+#endif
+#ifdef MACOS_CONVERT
+ else if ((from_prop & ENC_MACROMAN) && (to_prop & ENC_LATIN1))
+ {
+ vcp->vc_type = CONV_MAC_LATIN1;
+ }
+ else if ((from_prop & ENC_MACROMAN) && to_is_utf8)
+ {
+ vcp->vc_type = CONV_MAC_UTF8;
+ vcp->vc_factor = 2; // up to twice as long
+ }
+ else if ((from_prop & ENC_LATIN1) && (to_prop & ENC_MACROMAN))
+ {
+ vcp->vc_type = CONV_LATIN1_MAC;
+ }
+ else if (from_is_utf8 && (to_prop & ENC_MACROMAN))
+ {
+ vcp->vc_type = CONV_UTF8_MAC;
+ }
+#endif
+#ifdef USE_ICONV
+ else
+ {
+ // Use iconv() for conversion.
+ vcp->vc_fd = (iconv_t)my_iconv_open(
+ to_is_utf8 ? (char_u *)"utf-8" : to,
+ from_is_utf8 ? (char_u *)"utf-8" : from);
+ if (vcp->vc_fd != (iconv_t)-1)
+ {
+ vcp->vc_type = CONV_ICONV;
+ vcp->vc_factor = 4; // could be longer too...
+ }
+ }
+#endif
+ if (vcp->vc_type == CONV_NONE)
+ return FAIL;
+
+ return OK;
+}
+
+#if defined(FEAT_GUI) || defined(AMIGA) || defined(MSWIN) \
+ || defined(PROTO)
+/*
+ * Do conversion on typed input characters in-place.
+ * The input and output are not NUL terminated!
+ * Returns the length after conversion.
+ */
+ int
+convert_input(char_u *ptr, int len, int maxlen)
+{
+ return convert_input_safe(ptr, len, maxlen, NULL, NULL);
+}
+#endif
+
+/*
+ * Like convert_input(), but when there is an incomplete byte sequence at the
+ * end return that as an allocated string in "restp" and set "*restlenp" to
+ * the length. If "restp" is NULL it is not used.
+ */
+ int
+convert_input_safe(
+ char_u *ptr,
+ int len,
+ int maxlen,
+ char_u **restp,
+ int *restlenp)
+{
+ char_u *d;
+ int dlen = len;
+ int unconvertlen = 0;
+
+ d = string_convert_ext(&input_conv, ptr, &dlen,
+ restp == NULL ? NULL : &unconvertlen);
+ if (d == NULL)
+ return dlen;
+
+ if (dlen <= maxlen)
+ {
+ if (unconvertlen > 0)
+ {
+ // Move the unconverted characters to allocated memory.
+ *restp = alloc(unconvertlen);
+ if (*restp != NULL)
+ mch_memmove(*restp, ptr + len - unconvertlen, unconvertlen);
+ *restlenp = unconvertlen;
+ }
+ mch_memmove(ptr, d, dlen);
+ }
+ else
+ // result is too long, keep the unconverted text (the caller must
+ // have done something wrong!)
+ dlen = len;
+ vim_free(d);
+ return dlen;
+}
+
+/*
+ * Convert text "ptr[*lenp]" according to "vcp".
+ * Returns the result in allocated memory and sets "*lenp".
+ * When "lenp" is NULL, use NUL terminated strings.
+ * Illegal chars are often changed to "?", unless vcp->vc_fail is set.
+ * When something goes wrong, NULL is returned and "*lenp" is unchanged.
+ */
+ char_u *
+string_convert(
+ vimconv_T *vcp,
+ char_u *ptr,
+ int *lenp)
+{
+ return string_convert_ext(vcp, ptr, lenp, NULL);
+}
+
+/*
+ * Like string_convert(), but when "unconvlenp" is not NULL and there are is
+ * an incomplete sequence at the end it is not converted and "*unconvlenp" is
+ * set to the number of remaining bytes.
+ */
+ char_u *
+string_convert_ext(
+ vimconv_T *vcp,
+ char_u *ptr,
+ int *lenp,
+ int *unconvlenp)
+{
+ char_u *retval = NULL;
+ char_u *d;
+ int len;
+ int i;
+ int l;
+ int c;
+
+ if (lenp == NULL)
+ len = (int)STRLEN(ptr);
+ else
+ len = *lenp;
+ if (len == 0)
+ return vim_strsave((char_u *)"");
+
+ switch (vcp->vc_type)
+ {
+ case CONV_TO_UTF8: // latin1 to utf-8 conversion
+ retval = alloc(len * 2 + 1);
+ if (retval == NULL)
+ break;
+ d = retval;
+ for (i = 0; i < len; ++i)
+ {
+ c = ptr[i];
+ if (c < 0x80)
+ *d++ = c;
+ else
+ {
+ *d++ = 0xc0 + ((unsigned)c >> 6);
+ *d++ = 0x80 + (c & 0x3f);
+ }
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+ case CONV_9_TO_UTF8: // latin9 to utf-8 conversion
+ retval = alloc(len * 3 + 1);
+ if (retval == NULL)
+ break;
+ d = retval;
+ for (i = 0; i < len; ++i)
+ {
+ c = ptr[i];
+ switch (c)
+ {
+ case 0xa4: c = 0x20ac; break; // euro
+ case 0xa6: c = 0x0160; break; // S hat
+ case 0xa8: c = 0x0161; break; // S -hat
+ case 0xb4: c = 0x017d; break; // Z hat
+ case 0xb8: c = 0x017e; break; // Z -hat
+ case 0xbc: c = 0x0152; break; // OE
+ case 0xbd: c = 0x0153; break; // oe
+ case 0xbe: c = 0x0178; break; // Y
+ }
+ d += utf_char2bytes(c, d);
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+ case CONV_TO_LATIN1: // utf-8 to latin1 conversion
+ case CONV_TO_LATIN9: // utf-8 to latin9 conversion
+ retval = alloc(len + 1);
+ if (retval == NULL)
+ break;
+ d = retval;
+ for (i = 0; i < len; ++i)
+ {
+ l = utf_ptr2len_len(ptr + i, len - i);
+ if (l == 0)
+ *d++ = NUL;
+ else if (l == 1)
+ {
+ int l_w = utf8len_tab_zero[ptr[i]];
+
+ if (l_w == 0)
+ {
+ // Illegal utf-8 byte cannot be converted
+ vim_free(retval);
+ return NULL;
+ }
+ if (unconvlenp != NULL && l_w > len - i)
+ {
+ // Incomplete sequence at the end.
+ *unconvlenp = len - i;
+ break;
+ }
+ *d++ = ptr[i];
+ }
+ else
+ {
+ c = utf_ptr2char(ptr + i);
+ if (vcp->vc_type == CONV_TO_LATIN9)
+ switch (c)
+ {
+ case 0x20ac: c = 0xa4; break; // euro
+ case 0x0160: c = 0xa6; break; // S hat
+ case 0x0161: c = 0xa8; break; // S -hat
+ case 0x017d: c = 0xb4; break; // Z hat
+ case 0x017e: c = 0xb8; break; // Z -hat
+ case 0x0152: c = 0xbc; break; // OE
+ case 0x0153: c = 0xbd; break; // oe
+ case 0x0178: c = 0xbe; break; // Y
+ case 0xa4:
+ case 0xa6:
+ case 0xa8:
+ case 0xb4:
+ case 0xb8:
+ case 0xbc:
+ case 0xbd:
+ case 0xbe: c = 0x100; break; // not in latin9
+ }
+ if (!utf_iscomposing(c)) // skip composing chars
+ {
+ if (c < 0x100)
+ *d++ = c;
+ else if (vcp->vc_fail)
+ {
+ vim_free(retval);
+ return NULL;
+ }
+ else
+ {
+ *d++ = 0xbf;
+ if (utf_char2cells(c) > 1)
+ *d++ = '?';
+ }
+ }
+ i += l - 1;
+ }
+ }
+ *d = NUL;
+ if (lenp != NULL)
+ *lenp = (int)(d - retval);
+ break;
+
+# ifdef MACOS_CONVERT
+ case CONV_MAC_LATIN1:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'm', 'l', unconvlenp);
+ break;
+
+ case CONV_LATIN1_MAC:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'l', 'm', unconvlenp);
+ break;
+
+ case CONV_MAC_UTF8:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'm', 'u', unconvlenp);
+ break;
+
+ case CONV_UTF8_MAC:
+ retval = mac_string_convert(ptr, len, lenp, vcp->vc_fail,
+ 'u', 'm', unconvlenp);
+ break;
+# endif
+
+# ifdef USE_ICONV
+ case CONV_ICONV: // conversion with output_conv.vc_fd
+ retval = iconv_string(vcp, ptr, len, unconvlenp, lenp);
+ break;
+# endif
+# ifdef MSWIN
+ case CONV_CODEPAGE: // codepage -> codepage
+ {
+ int retlen;
+ int tmp_len;
+ short_u *tmp;
+
+ // 1. codepage/UTF-8 -> ucs-2.
+ if (vcp->vc_cpfrom == 0)
+ tmp_len = utf8_to_utf16(ptr, len, NULL, NULL);
+ else
+ {
+ tmp_len = MultiByteToWideChar(vcp->vc_cpfrom,
+ unconvlenp ? MB_ERR_INVALID_CHARS : 0,
+ (char *)ptr, len, 0, 0);
+ if (tmp_len == 0
+ && GetLastError() == ERROR_NO_UNICODE_TRANSLATION)
+ {
+ if (lenp != NULL)
+ *lenp = 0;
+ if (unconvlenp != NULL)
+ *unconvlenp = len;
+ retval = alloc(1);
+ if (retval)
+ retval[0] = NUL;
+ return retval;
+ }
+ }
+ tmp = ALLOC_MULT(short_u, tmp_len);
+ if (tmp == NULL)
+ break;
+ if (vcp->vc_cpfrom == 0)
+ utf8_to_utf16(ptr, len, tmp, unconvlenp);
+ else
+ MultiByteToWideChar(vcp->vc_cpfrom, 0,
+ (char *)ptr, len, tmp, tmp_len);
+
+ // 2. ucs-2 -> codepage/UTF-8.
+ if (vcp->vc_cpto == 0)
+ retlen = utf16_to_utf8(tmp, tmp_len, NULL);
+ else
+ retlen = WideCharToMultiByte(vcp->vc_cpto, 0,
+ tmp, tmp_len, 0, 0, 0, 0);
+ retval = alloc(retlen + 1);
+ if (retval != NULL)
+ {
+ if (vcp->vc_cpto == 0)
+ utf16_to_utf8(tmp, tmp_len, retval);
+ else
+ WideCharToMultiByte(vcp->vc_cpto, 0,
+ tmp, tmp_len,
+ (char *)retval, retlen, 0, 0);
+ retval[retlen] = NUL;
+ if (lenp != NULL)
+ *lenp = retlen;
+ }
+ vim_free(tmp);
+ break;
+ }
+# endif
+ }
+
+ return retval;
+}
+
+#if defined(FEAT_EVAL) || defined(PROTO)
+
+/*
+ * Table set by setcellwidths().
+ */
+typedef struct
+{
+ long first;
+ long last;
+ char width;
+} cw_interval_T;
+
+static cw_interval_T *cw_table = NULL;
+static size_t cw_table_size = 0;
+
+/*
+ * Return 1 or 2 when "c" is in the cellwidth table.
+ * Return 0 if not.
+ */
+ static int
+cw_value(int c)
+{
+ int mid, bot, top;
+
+ if (cw_table == NULL)
+ return 0;
+
+ // first quick check for Latin1 etc. characters
+ if (c < cw_table[0].first)
+ return 0;
+
+ // binary search in table
+ bot = 0;
+ top = (int)cw_table_size - 1;
+ while (top >= bot)
+ {
+ mid = (bot + top) / 2;
+ if (cw_table[mid].last < c)
+ bot = mid + 1;
+ else if (cw_table[mid].first > c)
+ top = mid - 1;
+ else
+ return cw_table[mid].width;
+ }
+ return 0;
+}
+
+ static int
+tv_nr_compare(const void *a1, const void *a2)
+{
+ listitem_T *li1 = *(listitem_T **)a1;
+ listitem_T *li2 = *(listitem_T **)a2;
+
+ return li1->li_tv.vval.v_number - li2->li_tv.vval.v_number;
+}
+
+ void
+f_setcellwidths(typval_T *argvars, typval_T *rettv UNUSED)
+{
+ list_T *l;
+ listitem_T *li;
+ int item;
+ int i;
+ listitem_T **ptrs;
+ cw_interval_T *table;
+ cw_interval_T *cw_table_save;
+ size_t cw_table_size_save;
+ char *error = NULL;
+
+ if (check_for_nonnull_list_arg(argvars, 0) == FAIL)
+ return;
+
+ l = argvars[0].vval.v_list;
+ if (l->lv_len == 0)
+ {
+ // Clearing the table.
+ vim_free(cw_table);
+ cw_table = NULL;
+ cw_table_size = 0;
+ return;
+ }
+
+ ptrs = ALLOC_MULT(listitem_T *, l->lv_len);
+ if (ptrs == NULL)
+ return;
+
+ // Check that all entries are a list with three numbers, the range is
+ // valid and the cell width is valid.
+ item = 0;
+ for (li = l->lv_first; li != NULL; li = li->li_next)
+ {
+ listitem_T *lili;
+ varnumber_T n1;
+
+ if (li->li_tv.v_type != VAR_LIST || li->li_tv.vval.v_list == NULL)
+ {
+ semsg(_(e_list_item_nr_is_not_list), item);
+ vim_free(ptrs);
+ return;
+ }
+
+ lili = li->li_tv.vval.v_list->lv_first;
+ ptrs[item] = lili;
+ for (i = 0; lili != NULL; lili = lili->li_next, ++i)
+ {
+ if (lili->li_tv.v_type != VAR_NUMBER)
+ break;
+ if (i == 0)
+ {
+ n1 = lili->li_tv.vval.v_number;
+ if (n1 < 0x80)
+ {
+ emsg(_(e_only_values_of_0x80_and_higher_supported));
+ vim_free(ptrs);
+ return;
+ }
+ }
+ else if (i == 1 && lili->li_tv.vval.v_number < n1)
+ {
+ semsg(_(e_list_item_nr_range_invalid), item);
+ vim_free(ptrs);
+ return;
+ }
+ else if (i == 2 && (lili->li_tv.vval.v_number < 1
+ || lili->li_tv.vval.v_number > 2))
+ {
+ semsg(_(e_list_item_nr_cell_width_invalid), item);
+ vim_free(ptrs);
+ return;
+ }
+ }
+ if (i != 3)
+ {
+ semsg(_(e_list_item_nr_does_not_contain_3_numbers), item);
+ vim_free(ptrs);
+ return;
+ }
+ ++item;
+ }
+
+ // Sort the list on the first number.
+ qsort((void *)ptrs, (size_t)l->lv_len, sizeof(listitem_T *), tv_nr_compare);
+
+ table = ALLOC_MULT(cw_interval_T, l->lv_len);
+ if (table == NULL)
+ {
+ vim_free(ptrs);
+ return;
+ }
+
+ // Store the items in the new table.
+ for (item = 0; item < l->lv_len; ++item)
+ {
+ listitem_T *lili = ptrs[item];
+ varnumber_T n1;
+
+ n1 = lili->li_tv.vval.v_number;
+ if (item > 0 && n1 <= table[item - 1].last)
+ {
+ semsg(_(e_overlapping_ranges_for_nr), (long)n1);
+ vim_free(ptrs);
+ vim_free(table);
+ return;
+ }
+ table[item].first = n1;
+ lili = lili->li_next;
+ table[item].last = lili->li_tv.vval.v_number;
+ lili = lili->li_next;
+ table[item].width = lili->li_tv.vval.v_number;
+ }
+
+ vim_free(ptrs);
+
+ cw_table_save = cw_table;
+ cw_table_size_save = cw_table_size;
+ cw_table = table;
+ cw_table_size = l->lv_len;
+
+ // Check that the new value does not conflict with 'listchars' or
+ // 'fillchars'.
+ error = check_chars_options();
+ if (error != NULL)
+ {
+ emsg(_(error));
+ cw_table = cw_table_save;
+ cw_table_size = cw_table_size_save;
+ vim_free(table);
+ return;
+ }
+
+ vim_free(cw_table_save);
+ redraw_all_later(UPD_CLEAR);
+}
+
+ void
+f_getcellwidths(typval_T *argvars UNUSED, typval_T *rettv)
+{
+ if (rettv_list_alloc(rettv) == FAIL)
+ return;
+
+ for (size_t i = 0; i < cw_table_size; i++)
+ {
+ list_T *entry = list_alloc();
+ if (entry == NULL)
+ break;
+ if (list_append_number(entry, (varnumber_T)cw_table[i].first) == FAIL
+ || list_append_number(entry, (varnumber_T)cw_table[i].last) == FAIL
+ || list_append_number(entry, (varnumber_T)cw_table[i].width) == FAIL
+ || list_append_list(rettv->vval.v_list, entry) == FAIL)
+ {
+ list_free(entry);
+ break;
+ }
+ }
+}
+
+ void
+f_charclass(typval_T *argvars, typval_T *rettv UNUSED)
+{
+ if (check_for_string_arg(argvars, 0) == FAIL
+ || argvars[0].vval.v_string == NULL)
+ return;
+ rettv->vval.v_number = mb_get_class(argvars[0].vval.v_string);
+}
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-19 18:03:05 +0000