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/* vi:set ts=8 sts=4 sw=4:
*
* 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
# include <windows.h>
# ifdef WIN32
# undef WIN32 /* Some windows.h define WIN32, we don't want that here. */
# endif
#endif
#if (defined(WIN3264) || defined(WIN32UNIX)) && !defined(__MINGW32__)
# include <winnls.h>
#endif
#ifdef FEAT_GUI_X11
# include <X11/Intrinsic.h>
#endif
#ifdef X_LOCALE
#include <X11/Xlocale.h>
#endif
#if defined(FEAT_GUI_GTK) && defined(FEAT_XIM)
# include <gdk/gdkkeysyms.h>
# ifdef WIN3264
# include <gdk/gdkwin32.h>
# else
# include <gdk/gdkx.h>
# 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
#if defined(FEAT_MBYTE) || defined(PROTO)
static int enc_canon_search __ARGS((char_u *name));
static int dbcs_char2len __ARGS((int c));
static int dbcs_char2bytes __ARGS((int c, char_u *buf));
static int dbcs_ptr2len __ARGS((char_u *p));
static int dbcs_ptr2len_len __ARGS((char_u *p, int size));
static int utf_ptr2cells_len __ARGS((char_u *p, int size));
static int dbcs_char2cells __ARGS((int c));
static int dbcs_ptr2cells_len __ARGS((char_u *p, int size));
static int dbcs_ptr2char __ARGS((char_u *p));
/*
* 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,
};
/*
* XIM often causes trouble. Define XIM_DEBUG to get a log of XIM callbacks
* in the "xim.log" file.
*/
/* #define XIM_DEBUG */
#ifdef XIM_DEBUG
static void
xim_log(char *s, ...)
{
va_list arglist;
static FILE *fd = NULL;
if (fd == (FILE *)-1)
return;
if (fd == NULL)
{
fd = mch_fopen("xim.log", "w");
if (fd == NULL)
{
EMSG("Cannot open xim.log");
fd = (FILE *)-1;
return;
}
}
va_start(arglist, s);
vfprintf(fd, s, arglist);
va_end(arglist);
}
#endif
#endif
#if defined(FEAT_MBYTE) || defined(FEAT_POSTSCRIPT) || defined(PROTO)
/*
* 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},
{"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 WIN3264
{"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},
{"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(WIN3264) || defined(WIN32UNIX) || defined(MACOS)
{"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(name)
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;
}
#endif
#if defined(FEAT_MBYTE) || defined(PROTO)
/*
* Find canonical encoding "name" in the list and return its properties.
* Returns 0 if not found.
*/
int
enc_canon_props(name)
char_u *name;
{
int i;
i = enc_canon_search(name);
if (i >= 0)
return enc_canon_table[i].prop;
#ifdef WIN3264
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(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_u *
mb_init()
{
int i;
int idx;
int n;
int enc_dbcs_new = 0;
#if defined(USE_ICONV) && !defined(WIN3264) && !defined(WIN32UNIX) \
&& !defined(MACOS)
# 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 WIN3264
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(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(p_enc + 2);
}
else
goto codepage_invalid;
}
else if (GetLastError() == ERROR_INVALID_PARAMETER)
{
codepage_invalid:
return (char_u *)N_("E543: Not a 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 WIN3264
/* Windows: accept only valid codepage numbers, check below. */
if (p_enc[6] != 'c' || p_enc[7] != 'p'
|| (enc_dbcs_new = atoi(p_enc + 8)) == 0)
return e_invarg;
#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_invarg;
if (enc_dbcs_new != 0)
{
#ifdef WIN3264
/* 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);
#ifdef WIN3264
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(WIN3264) || 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, (BYTE)i) ? 2 : 1;
#else
# if defined(MACOS) || defined(__amigaos4__)
/*
* 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];
# ifdef X_LOCALE
# ifndef mblen
# define mblen _Xmblen
# endif
# endif
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.
*/
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_string_option_direct((char_u *)"fencs", -1,
(char_u *)"ucs-bom,utf-8,default,latin1", OPT_FREE, 0);
#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 WIN32
/* 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
#ifdef FEAT_AUTOCMD
/* 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);
#endif
#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()
{
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;
}
/*
* 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(p)
char_u *p;
{
if (MB_BYTE2LEN(p[0]) == 1)
{
if (p[0] == NUL || vim_iswhite(p[0]))
return 0;
if (vim_iswordc(p[0]))
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(utf_ptr2char(p));
return 0;
}
/*
* Get class of a double-byte character. This always returns 3 or bigger.
* TODO: Should return 1 for punctuation.
*/
int
dbcs_class(lead, trail)
unsigned lead;
unsigned trail;
{
switch (enc_dbcs)
{
/* please add classfy 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(WIN3264) || defined(WIN32UNIX) || defined(MACOS)
/* 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: /* KU-TEN (Japanese comma) */
case 0x2123: /* TOU-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:
/* alpha-numeric */
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 : Alpha-numeric/Roman Letter (Full width)
* 24 : Hangul Letter(Alphabet)
* 25 : Roman Numeral/Greek Letter
* 26 : Box Drawings
* 27 : Unit Symbols
* 28 : Circled/Parenthesized Letter
* 29 : Hirigana/Katakana
* 30 : Cyrillic Letter
*/
if (c1 >= 0xB0 && c1 <= 0xC8)
/* Hangul */
return 20;
#if defined(WIN3264) || 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:
/* Alpha-numeric */
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:
/* Hirigana/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(c)
int c UNUSED;
{
return 1;
}
static int
dbcs_char2len(c)
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(c, buf)
int c;
char_u *buf;
{
buf[0] = c;
return 1;
}
static int
dbcs_char2bytes(c, buf)
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;
}
/*
* mb_ptr2len() function pointer.
* Get byte length of character at "*p" but stop at a NUL.
* For UTF-8 this includes following composing characters.
* Returns 0 when *p is NUL.
*/
int
latin_ptr2len(p)
char_u *p;
{
return MB_BYTE2LEN(*p);
}
static int
dbcs_ptr2len(p)
char_u *p;
{
int len;
/* Check if second byte is not missing. */
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(p, size)
char_u *p;
int size;
{
if (size < 1 || *p == NUL)
return 0;
return 1;
}
static int
dbcs_ptr2len_len(p, size)
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;
};
static int intable __ARGS((struct interval *table, size_t size, int c));
/*
* Return TRUE if "c" is in "table[size / sizeof(struct interval)]".
*/
static int
intable(table, size, c)
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;
}
/*
* 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(c)
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},
{0x11a3, 0x11a7},
{0x11fa, 0x11ff},
{0x2329, 0x232a},
{0x2e80, 0x2e99},
{0x2e9b, 0x2ef3},
{0x2f00, 0x2fd5},
{0x2ff0, 0x2ffb},
{0x3000, 0x3029},
{0x3030, 0x303e},
{0x3041, 0x3096},
{0x309b, 0x30ff},
{0x3105, 0x312d},
{0x3131, 0x318e},
{0x3190, 0x31b7},
{0x31c0, 0x31e3},
{0x31f0, 0x321e},
{0x3220, 0x3247},
{0x3250, 0x32fe},
{0x3300, 0x4dbf},
{0x4e00, 0xa48c},
{0xa490, 0xa4c6},
{0xa960, 0xa97c},
{0xac00, 0xd7a3},
{0xd7b0, 0xd7c6},
{0xd7cb, 0xd7fb},
{0xf900, 0xfaff},
{0xfe10, 0xfe19},
{0xfe30, 0xfe52},
{0xfe54, 0xfe66},
{0xfe68, 0xfe6b},
{0xff01, 0xff60},
{0xffe0, 0xffe6},
{0x1f200, 0x1f200},
{0x1f210, 0x1f231},
{0x1f240, 0x1f248},
{0x20000, 0x2fffd},
{0x30000, 0x3fffd}
};
/* 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},
{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},
{0x2614, 0x2615},
{0x261c, 0x261c},
{0x261e, 0x261e},
{0x2640, 0x2640},
{0x2642, 0x2642},
{0x2660, 0x2661},
{0x2663, 0x2665},
{0x2667, 0x266a},
{0x266c, 0x266d},
{0x266f, 0x266f},
{0x269e, 0x269f},
{0x26be, 0x26bf},
{0x26c4, 0x26cd},
{0x26cf, 0x26e1},
{0x26e3, 0x26e3},
{0x26e8, 0x26ff},
{0x273d, 0x273d},
{0x2757, 0x2757},
{0x2776, 0x277f},
{0x2b55, 0x2b59},
{0x3248, 0x324f},
{0xe000, 0xf8ff},
{0xfffd, 0xfffd},
{0x1f100, 0x1f10a},
{0x1f110, 0x1f12d},
{0x1f131, 0x1f131},
{0x1f13d, 0x1f13d},
{0x1f13f, 0x1f13f},
{0x1f142, 0x1f142},
{0x1f146, 0x1f146},
{0x1f14a, 0x1f14e},
{0x1f157, 0x1f157},
{0x1f15f, 0x1f15f},
{0x1f179, 0x1f179},
{0x1f17b, 0x1f17c},
{0x1f17f, 0x1f17f},
{0x1f18a, 0x1f18d},
{0x1f190, 0x1f190},
{0xf0000, 0xffffd},
{0x100000, 0x10fffd}
};
if (c >= 0x100)
{
#ifdef USE_WCHAR_FUNCTIONS
/*
* Assume the library function wcwidth() works better than our own
* stuff. It should return 1 for ambiguous width chars!
*/
int 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
}
/* 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(p)
char_u *p UNUSED;
{
return 1;
}
int
utf_ptr2cells(p)
char_u *p;
{
int c;
/* Need to convert to a wide character. */
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(p)
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(p, size)
char_u *p UNUSED;
int size UNUSED;
{
return 1;
}
static int
utf_ptr2cells_len(p, size)
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(p, size)
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(c)
int c UNUSED;
{
return 1;
}
static int
dbcs_char2cells(c)
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);
}
/*
* 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(off, max_off)
unsigned off UNUSED;
unsigned max_off UNUSED;
{
return 1;
}
int
dbcs_off2cells(off, max_off)
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(off, max_off)
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(p)
char_u *p;
{
return *p;
}
static int
dbcs_ptr2char(p)
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 wide character.
* If the sequence is illegal or truncated by a NUL the first byte is
* returned.
* Does not include composing characters, of course.
*/
int
utf_ptr2char(p)
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];
}
/*
* Get character at **pp and advance *pp to the next character.
* Note: composing characters are skipped!
*/
int
mb_ptr2char_adv(pp)
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(pp)
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 whether we are dealing with Arabic combining characters.
* Note: these are NOT really composing characters!
*/
int
arabic_combine(one, two)
int one; /* first character */
int two; /* character just after "one" */
{
if (one == a_LAM)
return arabic_maycombine(two);
return FALSE;
}
/*
* Check whether we are dealing with a character that could be regarded as an
* Arabic combining character, need to check the character before this.
*/
int
arabic_maycombine(two)
int two;
{
if (p_arshape && !p_tbidi)
return (two == a_ALEF_MADDA
|| two == a_ALEF_HAMZA_ABOVE
|| two == a_ALEF_HAMZA_BELOW
|| two == a_ALEF);
return FALSE;
}
/*
* 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(p1, p2)
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(p, pcc)
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(p, pcc, maxlen)
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.
* Only to be used when ScreenLinesUC[off] != 0.
* Returns the produced number of bytes.
*/
int
utfc_char2bytes(off, buf)
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(p)
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(b)
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(p, size)
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.
*/
int
utfc_ptr2len(p)
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(p, size)
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(c)
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.
* This does not include composing characters.
*/
int
utf_char2bytes(c, buf)
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;
}
/*
* 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(c)
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, 0x065e},
{0x0670, 0x0670},
{0x06d6, 0x06dc},
{0x06de, 0x06e4},
{0x06e7, 0x06e8},
{0x06ea, 0x06ed},
{0x0711, 0x0711},
{0x0730, 0x074a},
{0x07a6, 0x07b0},
{0x07eb, 0x07f3},
{0x0816, 0x0819},
{0x081b, 0x0823},
{0x0825, 0x0827},
{0x0829, 0x082d},
{0x0900, 0x0903},
{0x093c, 0x093c},
{0x093e, 0x094e},
{0x0951, 0x0955},
{0x0962, 0x0963},
{0x0981, 0x0983},
{0x09bc, 0x09bc},
{0x09be, 0x09c4},
{0x09c7, 0x09c8},
{0x09cb, 0x09cd},
{0x09d7, 0x09d7},
{0x09e2, 0x09e3},
{0x0a01, 0x0a03},
{0x0a3c, 0x0a3c},
{0x0a3e, 0x0a42},
{0x0a47, 0x0a48},
{0x0a4b, 0x0a4d},
{0x0a51, 0x0a51},
{0x0a70, 0x0a71},
{0x0a75, 0x0a75},
{0x0a81, 0x0a83},
{0x0abc, 0x0abc},
{0x0abe, 0x0ac5},
{0x0ac7, 0x0ac9},
{0x0acb, 0x0acd},
{0x0ae2, 0x0ae3},
{0x0b01, 0x0b03},
{0x0b3c, 0x0b3c},
{0x0b3e, 0x0b44},
{0x0b47, 0x0b48},
{0x0b4b, 0x0b4d},
{0x0b56, 0x0b57},
{0x0b62, 0x0b63},
{0x0b82, 0x0b82},
{0x0bbe, 0x0bc2},
{0x0bc6, 0x0bc8},
{0x0bca, 0x0bcd},
{0x0bd7, 0x0bd7},
{0x0c01, 0x0c03},
{0x0c3e, 0x0c44},
{0x0c46, 0x0c48},
{0x0c4a, 0x0c4d},
{0x0c55, 0x0c56},
{0x0c62, 0x0c63},
{0x0c82, 0x0c83},
{0x0cbc, 0x0cbc},
{0x0cbe, 0x0cc4},
{0x0cc6, 0x0cc8},
{0x0cca, 0x0ccd},
{0x0cd5, 0x0cd6},
{0x0ce2, 0x0ce3},
{0x0d02, 0x0d03},
{0x0d3e, 0x0d44},
{0x0d46, 0x0d48},
{0x0d4a, 0x0d4d},
{0x0d57, 0x0d57},
{0x0d62, 0x0d63},
{0x0d82, 0x0d83},
{0x0dca, 0x0dca},
{0x0dcf, 0x0dd4},
{0x0dd6, 0x0dd6},
{0x0dd8, 0x0ddf},
{0x0df2, 0x0df3},
{0x0e31, 0x0e31},
{0x0e34, 0x0e3a},
{0x0e47, 0x0e4e},
{0x0eb1, 0x0eb1},
{0x0eb4, 0x0eb9},
{0x0ebb, 0x0ebc},
{0x0ec8, 0x0ecd},
{0x0f18, 0x0f19},
{0x0f35, 0x0f35},
{0x0f37, 0x0f37},
{0x0f39, 0x0f39},
{0x0f3e, 0x0f3f},
{0x0f71, 0x0f84},
{0x0f86, 0x0f87},
{0x0f90, 0x0f97},
{0x0f99, 0x0fbc},
{0x0fc6, 0x0fc6},
{0x102b, 0x103e},
{0x1056, 0x1059},
{0x105e, 0x1060},
{0x1062, 0x1064},
{0x1067, 0x106d},
{0x1071, 0x1074},
{0x1082, 0x108d},
{0x108f, 0x108f},
{0x109a, 0x109d},
{0x135f, 0x135f},
{0x1712, 0x1714},
{0x1732, 0x1734},
{0x1752, 0x1753},
{0x1772, 0x1773},
{0x17b6, 0x17d3},
{0x17dd, 0x17dd},
{0x180b, 0x180d},
{0x18a9, 0x18a9},
{0x1920, 0x192b},
{0x1930, 0x193b},
{0x19b0, 0x19c0},
{0x19c8, 0x19c9},
{0x1a17, 0x1a1b},
{0x1a55, 0x1a5e},
{0x1a60, 0x1a7c},
{0x1a7f, 0x1a7f},
{0x1b00, 0x1b04},
{0x1b34, 0x1b44},
{0x1b6b, 0x1b73},
{0x1b80, 0x1b82},
{0x1ba1, 0x1baa},
{0x1c24, 0x1c37},
{0x1cd0, 0x1cd2},
{0x1cd4, 0x1ce8},
{0x1ced, 0x1ced},
{0x1cf2, 0x1cf2},
{0x1dc0, 0x1de6},
{0x1dfd, 0x1dff},
{0x20d0, 0x20f0},
{0x2cef, 0x2cf1},
{0x2de0, 0x2dff},
{0x302a, 0x302f},
{0x3099, 0x309a},
{0xa66f, 0xa672},
{0xa67c, 0xa67d},
{0xa6f0, 0xa6f1},
{0xa802, 0xa802},
{0xa806, 0xa806},
{0xa80b, 0xa80b},
{0xa823, 0xa827},
{0xa880, 0xa881},
{0xa8b4, 0xa8c4},
{0xa8e0, 0xa8f1},
{0xa926, 0xa92d},
{0xa947, 0xa953},
{0xa980, 0xa983},
{0xa9b3, 0xa9c0},
{0xaa29, 0xaa36},
{0xaa43, 0xaa43},
{0xaa4c, 0xaa4d},
{0xaa7b, 0xaa7b},
{0xaab0, 0xaab0},
{0xaab2, 0xaab4},
{0xaab7, 0xaab8},
{0xaabe, 0xaabf},
{0xaac1, 0xaac1},
{0xabe3, 0xabea},
{0xabec, 0xabed},
{0xfb1e, 0xfb1e},
{0xfe00, 0xfe0f},
{0xfe20, 0xfe26},
{0x101fd, 0x101fd},
{0x10a01, 0x10a03},
{0x10a05, 0x10a06},
{0x10a0c, 0x10a0f},
{0x10a38, 0x10a3a},
{0x10a3f, 0x10a3f},
{0x11080, 0x11082},
{0x110b0, 0x110ba},
{0x1d165, 0x1d169},
{0x1d16d, 0x1d172},
{0x1d17b, 0x1d182},
{0x1d185, 0x1d18b},
{0x1d1aa, 0x1d1ad},
{0x1d242, 0x1d244},
{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(c)
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},
{0x206a, 0x206f}, {0xd800, 0xdfff}, {0xfeff, 0xfeff}, {0xfff9, 0xfffb},
{0xfffe, 0xffff}
};
return !intable(nonprint, sizeof(nonprint), c);
#endif
}
/*
* Get class of a Unicode character.
* 0: white space
* 1: punctuation
* 2 or bigger: some class of word character.
*/
int
utf_class(c)
int c;
{
/* sorted list of non-overlapping intervals */
static struct clinterval
{
unsigned short first;
unsigned short last;
unsigned short 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},
{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 */
};
int bot = 0;
int top = sizeof(classes) / sizeof(struct clinterval) - 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(c))
return 2; /* word character */
return 1; /* punctuation */
}
/* binary search in table */
while (top >= bot)
{
mid = (bot + top) / 2;
if (classes[mid].last < c)
bot = mid + 1;
else if (classes[mid].first > c)
top = mid - 1;
else
return (int)classes[mid].class;
}
/* most other characters are "word" characters */
return 2;
}
/*
* 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},
{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},
{0x4d0,0x524,2,1},
{0x531,0x556,1,48},
{0x10a0,0x10c5,1,7264},
{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},
{0x2c00,0x2c2e,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},
{0xa640,0xa65e,2,1},
{0xa662,0xa66c,2,1},
{0xa680,0xa696,2,1},
{0xa722,0xa72e,2,1},
{0xa732,0xa76e,2,1},
{0xa779,0xa77b,2,1},
{0xa77d,0xa77d,-1,-35332},
{0xa77e,0xa786,2,1},
{0xa78b,0xa78b,-1,1},
{0xff21,0xff3a,1,32},
{0x10400,0x10427,1,40}
};
static int utf_convert(int a, convertStruct table[], int tableSize);
/*
* 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(a, table, tableSize)
int a;
convertStruct table[];
int tableSize;
{
int start, mid, end; /* indices into table */
start = 0;
end = tableSize / sizeof(convertStruct);
while (start < end)
{
/* need to search further */
mid = (end + start) /2;
if (table[mid].rangeEnd < a)
start = mid + 1;
else
end = mid;
}
if (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(a)
int a;
{
return utf_convert(a, foldCase, 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},
{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},
{0x4d0,0x524,2,1},
{0x531,0x556,1,48},
{0x10a0,0x10c5,1,7264},
{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},
{0x2c00,0x2c2e,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},
{0xa640,0xa65e,2,1},
{0xa662,0xa66c,2,1},
{0xa680,0xa696,2,1},
{0xa722,0xa72e,2,1},
{0xa732,0xa76e,2,1},
{0xa779,0xa77b,2,1},
{0xa77d,0xa77d,-1,-35332},
{0xa77e,0xa786,2,1},
{0xa78b,0xa78b,-1,1},
{0xff21,0xff3a,1,32},
{0x10400,0x10427,1,40}
};
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},
{0x260,0x260,-1,-205},
{0x263,0x263,-1,-207},
{0x268,0x268,-1,-209},
{0x269,0x269,-1,-211},
{0x26b,0x26b,-1,10743},
{0x26f,0x26f,-1,-211},
{0x271,0x271,-1,10749},
{0x272,0x272,-1,-213},
{0x275,0x275,-1,-214},
{0x27d,0x27d,-1,10727},
{0x280,0x283,3,-218},
{0x288,0x288,-1,-218},
{0x289,0x289,-1,-69},
{0x28a,0x28b,1,-217},
{0x28c,0x28c,-1,-71},
{0x292,0x292,-1,-219},
{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},
{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},
{0x4d1,0x525,2,-1},
{0x561,0x586,1,-48},
{0x1d79,0x1d79,-1,35332},
{0x1d7d,0x1d7d,-1,3814},
{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},
{0x2c30,0x2c5e,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},
{0x2d00,0x2d25,1,-7264},
{0xa641,0xa65f,2,-1},
{0xa663,0xa66d,2,-1},
{0xa681,0xa697,2,-1},
{0xa723,0xa72f,2,-1},
{0xa733,0xa76f,2,-1},
{0xa77a,0xa77c,2,-1},
{0xa77f,0xa787,2,-1},
{0xa78c,0xa78c,-1,-1},
{0xff41,0xff5a,1,-32},
{0x10428,0x1044f,1,-40}
};
/*
* Return the upper-case equivalent of "a", which is a UCS-4 character. Use
* simple case folding.
*/
int
utf_toupper(a)
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, sizeof(toUpper));
}
int
utf_islower(a)
int a;
{
return (utf_toupper(a) != a);
}
/*
* Return the lower-case equivalent of "a", which is a UCS-4 character. Use
* simple case folding.
*/
int
utf_tolower(a)
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, sizeof(toLower));
}
int
utf_isupper(a)
int a;
{
return (utf_tolower(a) != a);
}
/*
* Version of strnicmp() that handles multi-byte characters.
* Needed for Big5, Sjift-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(s1, s2, nn)
char_u *s1, *s2;
size_t nn;
{
int i, j, l;
int cdiff;
int incomplete = FALSE;
int n = (int)nn;
for (i = 0; i < n; i += l)
{
if (s1[i] == NUL && s2[i] == NUL) /* both strings end */
return 0;
if (enc_utf8)
{
l = utf_byte2len(s1[i]);
if (l > n - i)
{
l = n - i; /* incomplete character */
incomplete = TRUE;
}
/* Check directly first, it's faster. */
for (j = 0; j < l; ++j)
{
if (s1[i + j] != s2[i + j])
break;
if (s1[i + j] == 0)
/* Both stings have the same bytes but are incomplete or
* have illegal bytes, accept them as equal. */
l = j;
}
if (j < l)
{
/* If one of the two characters is incomplete return -1. */
if (incomplete || i + utf_byte2len(s2[i]) > n)
return -1;
cdiff = utf_fold(utf_ptr2char(s1 + i))
- utf_fold(utf_ptr2char(s2 + i));
if (cdiff != 0)
return cdiff;
}
}
else
{
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()
{
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(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(base, p)
char_u *base UNUSED;
char_u *p UNUSED;
{
return 0;
}
int
dbcs_head_off(base, p)
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(base, p)
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;
}
int
utf_head_off(base, p)
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);
}
/*
* Copy a character from "*fp" to "*tp" and advance the pointers.
*/
void
mb_copy_char(fp, tp)
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(base, p)
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.
*/
int
mb_tail_off(base, p)
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()
{
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);
}
#ifdef FEAT_VIRTUALEDIT
curwin->w_cursor.coladd = 0;
#endif
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(PROTO)
/*
* Return TRUE if string "s" is a valid utf-8 string.
* When "end" is NULL stop at the first NUL.
* When "end" is positive stop there.
*/
int
utf_valid_string(s, end)
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(base, p)
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()
{
mb_adjustpos(&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(lp)
pos_T *lp;
{
char_u *p;
if (lp->col > 0
#ifdef FEAT_VIRTUALEDIT
|| lp->coladd > 1
#endif
)
{
p = ml_get(lp->lnum);
lp->col -= (*mb_head_off)(p, p + lp->col);
#ifdef FEAT_VIRTUALEDIT
/* 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;
#endif
}
}
/*
* Return a pointer to the character before "*p", if there is one.
*/
char_u *
mb_prevptr(line, p)
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(str)
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;
}
#if defined(FEAT_SPELL) || defined(PROTO)
/*
* Like mb_charlen() but for a string with specified length.
*/
int
mb_charlen_len(str, 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;
}
#endif
/*
* 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(pp)
char_u **pp;
{
static char_u buf[MB_MAXBYTES + 1];
int n, 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. */
for (n = 0; str[n] != NUL && m <= MB_MAXBYTES; ++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;
}
}
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(row, col)
int row;
int col;
{
#ifdef FEAT_HANGULIN
if (composing_hangul)
return TRUE;
#endif
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(col, row)
int col;
int row;
{
col = check_col(col);
row = check_row(row);
if (has_mbyte && ScreenLines != NULL && col > 0
&& ((enc_dbcs
&& ScreenLines[LineOffset[row] + col] != NUL
&& dbcs_screen_head_off(ScreenLines + LineOffset[row],
ScreenLines + LineOffset[row] + col))
|| (enc_utf8 && ScreenLines[LineOffset[row] + col] == 0)))
return col - 1;
return col;
}
#endif
#if defined(FEAT_MBYTE) || defined(FEAT_POSTSCRIPT) || defined(PROTO)
static int enc_alias_search __ARGS((char_u *name));
/*
* Skip the Vim specific head of a 'encoding' name.
*/
char_u *
enc_skip(p)
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(enc)
char_u *enc;
{
char_u *r;
char_u *p, *s;
int i;
# ifdef FEAT_MBYTE
if (STRCMP(enc, "default") == 0)
{
/* Use the default encoding as it's found by set_init_1(). */
r = get_encoding_default();
if (r == NULL)
r = (char_u *)"latin1";
return vim_strsave(r);
}
# endif
/* copy "enc" to allocated memory, with room for two '-' */
r = alloc((unsigned)(STRLEN(enc) + 3));
if (r != 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 && 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(name)
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;
}
#endif
#if defined(FEAT_MBYTE) || defined(PROTO)
#ifdef HAVE_LANGINFO_H
# include <langinfo.h>
#endif
/*
* Get the canonicalized encoding of the current locale.
* Returns an allocated string when successful, NULL when not.
*/
char_u *
enc_locale()
{
#ifndef WIN3264
char *s;
char *p;
int i;
#endif
char buf[50];
#ifdef WIN3264
long acp = GetACP();
if (acp == 1200)
STRCPY(buf, "ucs-2le");
else if (acp == 1252) /* cp1252 is used as latin1 */
STRCPY(buf, "latin1");
else
sprintf(buf, "cp%ld", acp);
#else
# 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
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 FAIL;
/* 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; s[i] != NUL && i < (int)sizeof(buf) - 1; ++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;
#endif
return enc_canonize((char_u *)buf);
}
#if defined(WIN3264) || defined(PROTO)
/*
* Convert an encoding name to an MS-Windows codepage.
* Returns zero if no codepage can be figured out.
*/
int
encname2codepage(name)
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(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)
static char_u *iconv_string __ARGS((vimconv_T *vcp, char_u *str, int slen, int *unconvlenp, int *resultlenp));
/*
* 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(to, from)
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(vcp, str, slen, unconvlenp, resultlenp)
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((unsigned)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_free(result);
result = NULL;
break;
}
/* Not enough room or skipping illegal sequence. */
done = to - (char *)result;
}
if (resultlenp != NULL)
*resultlenp = (int)(to - (char *)result);
return result;
}
# if defined(DYNAMIC_ICONV) || defined(PROTO)
/*
* Dynamically load the "iconv.dll" on Win32.
*/
#ifndef DYNAMIC_ICONV /* just generating prototypes */