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- /* vi:set ts=8 sts=4 sw=4:
- *
- * VIM - Vi IMproved by Bram Moolenaar
- *
- * Do ":help uganda" in Vim to read copying and usage conditions.
- * Do ":help credits" in Vim to see a list of people who contributed.
- * See README.txt for an overview of the Vim source code.
- */
-
- #include "vim.h"
-
- #ifdef FEAT_LINEBREAK
- static int win_chartabsize __ARGS((win_T *wp, char_u *p, colnr_T col));
- #endif
-
- #ifdef FEAT_MBYTE
- static int win_nolbr_chartabsize __ARGS((win_T *wp, char_u *s, colnr_T col, int *headp));
- #endif
-
- static int nr2hex __ARGS((int c));
-
- static int chartab_initialized = FALSE;
-
- /* b_chartab[] is an array of 32 bytes, each bit representing one of the
- * characters 0-255. */
- #define SET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] |= (1 << ((c) & 0x7))
- #define RESET_CHARTAB(buf, c) (buf)->b_chartab[(unsigned)(c) >> 3] &= ~(1 << ((c) & 0x7))
- #define GET_CHARTAB(buf, c) ((buf)->b_chartab[(unsigned)(c) >> 3] & (1 << ((c) & 0x7)))
-
- /*
- * Fill chartab[]. Also fills curbuf->b_chartab[] with flags for keyword
- * characters for current buffer.
- *
- * Depends on the option settings 'iskeyword', 'isident', 'isfname',
- * 'isprint' and 'encoding'.
- *
- * The index in chartab[] depends on 'encoding':
- * - For non-multi-byte index with the byte (same as the character).
- * - For DBCS index with the first byte.
- * - For UTF-8 index with the character (when first byte is up to 0x80 it is
- * the same as the character, if the first byte is 0x80 and above it depends
- * on further bytes).
- *
- * The contents of chartab[]:
- * - The lower two bits, masked by CT_CELL_MASK, give the number of display
- * cells the character occupies (1 or 2). Not valid for UTF-8 above 0x80.
- * - CT_PRINT_CHAR bit is set when the character is printable (no need to
- * translate the character before displaying it). Note that only DBCS
- * characters can have 2 display cells and still be printable.
- * - CT_FNAME_CHAR bit is set when the character can be in a file name.
- * - CT_ID_CHAR bit is set when the character can be in an identifier.
- *
- * Return FAIL if 'iskeyword', 'isident', 'isfname' or 'isprint' option has an
- * error, OK otherwise.
- */
- int
- init_chartab()
- {
- return buf_init_chartab(curbuf, TRUE);
- }
-
- int
- buf_init_chartab(buf, global)
- buf_T *buf;
- int global; /* FALSE: only set buf->b_chartab[] */
- {
- int c;
- int c2;
- char_u *p;
- int i;
- int tilde;
- int do_isalpha;
-
- if (global)
- {
- /*
- * Set the default size for printable characters:
- * From <Space> to '~' is 1 (printable), others are 2 (not printable).
- * This also inits all 'isident' and 'isfname' flags to FALSE.
- *
- * EBCDIC: all chars below ' ' are not printable, all others are
- * printable.
- */
- c = 0;
- while (c < ' ')
- chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2;
- #ifdef EBCDIC
- while (c < 255)
- #else
- while (c <= '~')
- #endif
- chartab[c++] = 1 + CT_PRINT_CHAR;
- #ifdef FEAT_FKMAP
- if (p_altkeymap)
- {
- while (c < YE)
- chartab[c++] = 1 + CT_PRINT_CHAR;
- }
- #endif
- while (c < 256)
- {
- #ifdef FEAT_MBYTE
- /* UTF-8: bytes 0xa0 - 0xff are printable (latin1) */
- if (enc_utf8 && c >= 0xa0)
- chartab[c++] = CT_PRINT_CHAR + 1;
- /* euc-jp characters starting with 0x8e are single width */
- else if (enc_dbcs == DBCS_JPNU && c == 0x8e)
- chartab[c++] = CT_PRINT_CHAR + 1;
- /* other double-byte chars can be printable AND double-width */
- else if (enc_dbcs != 0 && MB_BYTE2LEN(c) == 2)
- chartab[c++] = CT_PRINT_CHAR + 2;
- else
- #endif
- /* the rest is unprintable by default */
- chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2;
- }
-
- #ifdef FEAT_MBYTE
- /* Assume that every multi-byte char is a filename character. */
- for (c = 1; c < 256; ++c)
- if ((enc_dbcs != 0 && MB_BYTE2LEN(c) > 1)
- || (enc_dbcs == DBCS_JPNU && c == 0x8e)
- || (enc_utf8 && c >= 0xa0))
- chartab[c] |= CT_FNAME_CHAR;
- #endif
- }
-
- /*
- * Init word char flags all to FALSE
- */
- vim_memset(buf->b_chartab, 0, (size_t)32);
- #ifdef FEAT_MBYTE
- for (c = 0; c < 256; ++c)
- {
- /* double-byte characters are probably word characters */
- if (enc_dbcs != 0 && MB_BYTE2LEN(c) == 2)
- SET_CHARTAB(buf, c);
- }
- #endif
-
- #ifdef FEAT_LISP
- /*
- * In lisp mode the '-' character is included in keywords.
- */
- if (buf->b_p_lisp)
- SET_CHARTAB(buf, '-');
- #endif
-
- /* Walk through the 'isident', 'iskeyword', 'isfname' and 'isprint'
- * options Each option is a list of characters, character numbers or
- * ranges, separated by commas, e.g.: "200-210,x,#-178,-"
- */
- for (i = global ? 0 : 3; i <= 3; ++i)
- {
- if (i == 0)
- p = p_isi; /* first round: 'isident' */
- else if (i == 1)
- p = p_isp; /* second round: 'isprint' */
- else if (i == 2)
- p = p_isf; /* third round: 'isfname' */
- else /* i == 3 */
- p = buf->b_p_isk; /* fourth round: 'iskeyword' */
-
- while (*p)
- {
- tilde = FALSE;
- do_isalpha = FALSE;
- if (*p == '^' && p[1] != NUL)
- {
- tilde = TRUE;
- ++p;
- }
- if (isdigit(*p))
- c = getdigits(&p);
- else
- c = *p++;
- c2 = -1;
- if (*p == '-' && p[1] != NUL)
- {
- ++p;
- if (isdigit(*p))
- c2 = getdigits(&p);
- else
- c2 = *p++;
- }
- if (c <= 0 || (c2 < c && c2 != -1) || c2 >= 256
- || !(*p == NUL || *p == ','))
- return FAIL;
-
- if (c2 == -1) /* not a range */
- {
- /*
- * A single '@' (not "@-@"):
- * Decide on letters being ID/printable/keyword chars with
- * standard function isalpha(). This takes care of locale for
- * single-byte characters).
- */
- if (c == '@')
- {
- do_isalpha = TRUE;
- c = 1;
- c2 = 255;
- }
- else
- c2 = c;
- }
- while (c <= c2)
- {
- if (!do_isalpha || isalpha(c)
- #ifdef FEAT_FKMAP
- || (p_altkeymap && (F_isalpha(c) || F_isdigit(c)))
- #endif
- )
- {
- if (i == 0) /* (re)set ID flag */
- {
- if (tilde)
- chartab[c] &= ~CT_ID_CHAR;
- else
- chartab[c] |= CT_ID_CHAR;
- }
- else if (i == 1) /* (re)set printable */
- {
- if ((c < ' '
- #ifndef EBCDIC
- || c > '~'
- #endif
- #ifdef FEAT_FKMAP
- || (p_altkeymap
- && (F_isalpha(c) || F_isdigit(c)))
- #endif
- )
- #ifdef FEAT_MBYTE
- /* For double-byte we keep the cell width, so
- * that we can detect it from the first byte. */
- && !(enc_dbcs && MB_BYTE2LEN(c) == 2)
- #endif
- )
- {
- if (tilde)
- {
- chartab[c] = (chartab[c] & ~CT_CELL_MASK)
- + ((dy_flags & DY_UHEX) ? 4 : 2);
- chartab[c] &= ~CT_PRINT_CHAR;
- }
- else
- {
- chartab[c] = (chartab[c] & ~CT_CELL_MASK) + 1;
- chartab[c] |= CT_PRINT_CHAR;
- }
- }
- }
- else if (i == 2) /* (re)set fname flag */
- {
- if (tilde)
- chartab[c] &= ~CT_FNAME_CHAR;
- else
- chartab[c] |= CT_FNAME_CHAR;
- }
- else /* i == 3 */ /* (re)set keyword flag */
- {
- if (tilde)
- RESET_CHARTAB(buf, c);
- else
- SET_CHARTAB(buf, c);
- }
- }
- ++c;
- }
- p = skip_to_option_part(p);
- }
- }
- chartab_initialized = TRUE;
- return OK;
- }
-
- #if defined(FEAT_STL_OPT) || defined(FEAT_WINDOWS) || defined(PROTO)
- /*
- * Translate any special characters in buf[bufsize] in-place.
- * If there is not enough room, not all characters will be translated.
- */
- void
- trans_characters(buf, bufsize)
- char_u *buf;
- int bufsize;
- {
- int len; /* length of string needing translation */
- int room; /* room in buffer after string */
- char_u *trs; /* translated character */
- int trs_len; /* length of trs[] */
-
- len = (int)STRLEN(buf);
- room = bufsize - len;
- while (*buf != 0)
- {
- #ifdef FEAT_MBYTE
- /* Assume a multi-byte character doesn't need translation. */
- if (has_mbyte && (trs_len = (*mb_ptr2len_check)(buf)) > 1)
- len -= trs_len;
- else
- #endif
- {
- trs = transchar(*buf);
- trs_len = (int)STRLEN(trs);
- if (trs_len > 1)
- {
- room -= trs_len - 1;
- if (room <= 0)
- return;
- mch_memmove(buf + trs_len, buf + 1, (size_t)len);
- }
- mch_memmove(buf, trs, (size_t)trs_len);
- --len;
- }
- buf += trs_len;
- }
- }
- #endif
-
- #if defined(FEAT_EVAL) || defined(FEAT_TITLE) || defined(PROTO)
- /*
- * Translate a string into allocated memory, replacing special chars with
- * printable chars. Returns NULL when out of memory.
- */
- char_u *
- transstr(s)
- char_u *s;
- {
- char_u *res;
- #ifdef FEAT_MBYTE
- int l;
- #endif
-
- res = alloc((unsigned)(vim_strsize(s) + 1));
- if (res != NULL)
- {
- *res = NUL;
- while (*s != NUL)
- {
- #ifdef FEAT_MBYTE
- if (has_mbyte && (l = (*mb_ptr2len_check)(s)) > 1)
- {
- STRNCAT(res, s, l);
- s += l;
- }
- else
- #endif
- STRCAT(res, transchar(*s++));
- }
- }
- return res;
- }
- #endif
-
- #if defined(FEAT_SYN_HL) || defined(FEAT_INS_EXPAND) || defined(PROTO)
- /*
- * Convert the string "p" to do ignore-case comparing.
- * It's done in-place.
- */
- void
- str_foldcase(p)
- char_u *p;
- {
- while (*p != NUL)
- {
- #ifdef FEAT_MBYTE
- if (has_mbyte && MB_BYTE2LEN(*p) > 1)
- {
- if (enc_utf8)
- {
- int c, lc;
-
- c = utf_ptr2char(p);
- lc = utf_tolower(c);
- if (c != lc && utf_char2len(c) == utf_char2len(lc))
- (void)utf_char2bytes(c, p);
- }
- p += (*mb_ptr2len_check)(p); /* skip multi-byte char */
- }
- else
- #endif
- {
- *p = TO_LOWER(*p);
- ++p;
- }
- }
- }
- #endif
-
- /*
- * Catch 22: chartab[] can't be initialized before the options are
- * initialized, and initializing options may cause transchar() to be called!
- * When chartab_initialized == FALSE don't use chartab[].
- * Does NOT work for multi-byte characters, c must be <= 255.
- */
- char_u *
- transchar(c)
- int c;
- {
- static char_u buf[7];
- int i;
-
- i = 0;
- if (IS_SPECIAL(c)) /* special key code, display as ~@ char */
- {
- buf[0] = '~';
- buf[1] = '@';
- i = 2;
- c = K_SECOND(c);
- }
-
- if ((!chartab_initialized && (
- #ifdef EBCDIC
- (c >= 64 && c < 255)
- #else
- (c >= ' ' && c <= '~')
- #endif
- #ifdef FEAT_FKMAP
- || F_ischar(c)
- #endif
- )) || (c < 256 && vim_isprintc_strict(c)))
- {
- /* printable character */
- buf[i] = c;
- buf[i + 1] = NUL;
- }
- else
- transchar_nonprint(buf + i, c);
- return buf;
- }
-
- /*
- * Convert non-printable character to two or more printable characters in
- * "buf[]". "buf" needs to be able to hold five bytes.
- * Does NOT work for multi-byte characters, c must be <= 255.
- */
- void
- transchar_nonprint(buf, c)
- char_u *buf;
- int c;
- {
- if (c == NL)
- c = NUL; /* we use newline in place of a NUL */
- else if (c == CR && get_fileformat(curbuf) == EOL_MAC)
- c = NL; /* we use CR in place of NL in this case */
-
- if (dy_flags & DY_UHEX) /* 'display' has "uhex" */
- transchar_hex(buf, c);
-
- #ifdef EBCDIC
- /* For EBCDIC only the characters 0-63 and 255 are not printable */
- else if (CtrlChar(c) != 0 || c == DEL)
- #else
- else if (c <= 0x7f) /* 0x00 - 0x1f and 0x7f */
- #endif
- {
- buf[0] = '^';
- #ifdef EBCDIC
- if (c == DEL)
- buf[1] = '?'; /* DEL displayed as ^? */
- else
- buf[1] = CtrlChar(c);
- #else
- buf[1] = c ^ 0x40; /* DEL displayed as ^? */
- #endif
-
- buf[2] = NUL;
- }
- #ifdef FEAT_MBYTE
- else if (enc_utf8 && c >= 0x80)
- {
- transchar_hex(buf, c);
- }
- #endif
- #ifndef EBCDIC
- else if (c >= ' ' + 0x80 && c <= '~' + 0x80) /* 0xa0 - 0xfe */
- {
- buf[0] = '|';
- buf[1] = c - 0x80;
- buf[2] = NUL;
- }
- #else
- else if (c < 64)
- {
- buf[0] = '~';
- buf[1] = MetaChar(c);
- buf[2] = NUL;
- }
- #endif
- else /* 0x80 - 0x9f and 0xff */
- {
- /*
- * TODO: EBCDIC I don't know what to do with this chars, so I display
- * them as '~?' for now
- */
- buf[0] = '~';
- #ifdef EBCDIC
- buf[1] = '?'; /* 0xff displayed as ~? */
- #else
- buf[1] = (c - 0x80) ^ 0x40; /* 0xff displayed as ~? */
- #endif
- buf[2] = NUL;
- }
- }
-
- void
- transchar_hex(buf, c)
- char_u *buf;
- int c;
- {
- int i = 0;
-
- buf[0] = '<';
- #ifdef FEAT_MBYTE
- if (c > 255)
- {
- buf[++i] = nr2hex((unsigned)c >> 12);
- buf[++i] = nr2hex((unsigned)c >> 8);
- }
- #endif
- buf[++i] = nr2hex((unsigned)c >> 4);
- buf[++i] = nr2hex(c);
- buf[++i] = '>';
- buf[++i] = NUL;
- }
-
- /*
- * Convert the lower 4 bits of byte "c" to its hex character.
- * Lower case letters are used to avoid the confusion of <F1> being 0xf1 or
- * function key 1.
- */
- static int
- nr2hex(c)
- int c;
- {
- if ((c & 0xf) <= 9)
- return (c & 0xf) + '0';
- return (c & 0xf) - 10 + 'a';
- }
-
- /*
- * Return number of display cells occupied by byte "b".
- * Caller must make sure 0 <= b <= 255.
- * For multi-byte mode "b" must be the first byte of a character.
- * A TAB is counted as two cells: "^I".
- * For UTF-8 mode this will return 0 for bytes >= 0x80, because the number of
- * cells depends on further bytes.
- */
- int
- byte2cells(b)
- int b;
- {
- #ifdef FEAT_MBYTE
- if (enc_utf8 && b >= 0x80)
- return 0;
- #endif
- return (chartab[b] & CT_CELL_MASK);
- }
-
- /*
- * Return number of display cells occupied by character "c".
- * "c" can be a special key (negative number) in which case 3 or 4 is returned.
- * A TAB is counted as two cells: "^I" or four: "<09>".
- */
- int
- char2cells(c)
- int c;
- {
- if (IS_SPECIAL(c))
- return char2cells(K_SECOND(c)) + 2;
- #ifdef FEAT_MBYTE
- if (c >= 0x80)
- {
- /* UTF-8: above 0x80 need to check the value */
- if (enc_utf8)
- return utf_char2cells(c);
- /* DBCS: double-byte means double-width, except for euc-jp with first
- * byte 0x8e */
- if (enc_dbcs != 0 && c >= 0x100)
- {
- if (enc_dbcs == DBCS_JPNU && ((unsigned)c >> 8) == 0x8e)
- return 1;
- return 2;
- }
- }
- #endif
- return (chartab[c & 0xff] & CT_CELL_MASK);
- }
-
- /*
- * Return number of display cells occupied by character at "*p".
- * A TAB is counted as two cells: "^I" or four: "<09>".
- */
- int
- ptr2cells(p)
- char_u *p;
- {
- #ifdef FEAT_MBYTE
- /* For UTF-8 we need to look at more bytes if the first byte is >= 0x80. */
- if (enc_utf8 && *p >= 0x80)
- return utf_ptr2cells(p);
- /* For DBCS we can tell the cell count from the first byte. */
- #endif
- return (chartab[*p] & CT_CELL_MASK);
- }
-
- /*
- * Return the number of characters string 's' will take on the screen,
- * counting TABs as two characters: "^I".
- */
- int
- vim_strsize(s)
- char_u *s;
- {
- int len = 0;
-
- while (*s != NUL)
- {
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- {
- len += ptr2cells(s);
- s += (*mb_ptr2len_check)(s);
- }
- else
- #endif
- len += byte2cells(*s++);
- }
- return len;
- }
-
- /*
- * Return the number of characters 'c' will take on the screen, taking
- * into account the size of a tab.
- * Use a define to make it fast, this is used very often!!!
- * Also see getvcol() below.
- */
-
- #define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \
- if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \
- { \
- int ts; \
- ts = (buf)->b_p_ts; \
- return (int)(ts - (col % ts)); \
- } \
- else \
- return ptr2cells(p);
-
- #if defined(FEAT_VREPLACE) || defined(FEAT_EX_EXTRA) || defined(FEAT_GUI) \
- || defined(FEAT_VIRTUALEDIT) || defined(PROTO)
- int
- chartabsize(p, col)
- char_u *p;
- colnr_T col;
- {
- RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, p, col)
- }
- #endif
-
- #ifdef FEAT_LINEBREAK
- static int
- win_chartabsize(wp, p, col)
- win_T *wp;
- char_u *p;
- colnr_T col;
- {
- RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, p, col)
- }
- #endif
-
- /*
- * return the number of characters the string 's' will take on the screen,
- * taking into account the size of a tab
- */
- int
- linetabsize(s)
- char_u *s;
- {
- colnr_T col = 0;
-
- while (*s != NUL)
- col += lbr_chartabsize_adv(&s, col);
- return (int)col;
- }
-
- /*
- * Like linetabsize(), but for a given window instead of the current one.
- */
- int
- win_linetabsize(wp, p, len)
- win_T *wp;
- char_u *p;
- colnr_T len;
- {
- colnr_T col = 0;
- char_u *s;
-
- for (s = p; *s != NUL && s < p + len; )
- {
- col += win_lbr_chartabsize(wp, s, col, NULL);
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- s += (*mb_ptr2len_check)(s);
- else
- #endif
- ++s;
- }
- return (int)col;
- }
-
- /*
- * return TRUE if 'c' is a normal identifier character
- * letters and characters from 'isident' option.
- */
- int
- vim_isIDc(c)
- int c;
- {
- return (c > 0 && c < 0x100 && (chartab[c] & CT_ID_CHAR));
- }
-
- /*
- * return TRUE if 'c' is a keyword character: Letters and characters from
- * 'iskeyword' option for current buffer.
- * For multi-byte characters mb_get_class() is used (builtin rules).
- */
- int
- vim_iswordc(c)
- int c;
- {
- #ifdef FEAT_MBYTE
- if (c >= 0x100)
- {
- if (enc_dbcs != 0)
- return dbcs_class((unsigned)c >> 8, c & 0xff) >= 2;
- if (enc_utf8)
- return utf_class(c) >= 2;
- }
- #endif
- return (c > 0 && c < 0x100 && GET_CHARTAB(curbuf, c) != 0);
- }
-
- /*
- * Just like vim_iswordc() but uses a pointer to the (multi-byte) character.
- */
- int
- vim_iswordp(p)
- char_u *p;
- {
- #ifdef FEAT_MBYTE
- if (has_mbyte && MB_BYTE2LEN(*p) > 1)
- return mb_get_class(p) >= 2;
- #endif
- return GET_CHARTAB(curbuf, *p) != 0;
- }
-
- #if defined(FEAT_SYN_HL) || defined(PROTO)
- int
- vim_iswordc_buf(p, buf)
- char_u *p;
- buf_T *buf;
- {
- # ifdef FEAT_MBYTE
- if (has_mbyte && MB_BYTE2LEN(*p) > 1)
- return mb_get_class(p) >= 2;
- # endif
- return (GET_CHARTAB(buf, *p) != 0);
- }
- #endif
-
- /*
- * return TRUE if 'c' is a valid file-name character
- * Assume characters above 0x100 are valid (multi-byte).
- */
- int
- vim_isfilec(c)
- int c;
- {
- return (c >= 0x100 || (c > 0 && (chartab[c] & CT_FNAME_CHAR)));
- }
-
- /*
- * return TRUE if 'c' is a printable character
- * Assume characters above 0x100 are printable (multi-byte), except for
- * Unicode.
- */
- int
- vim_isprintc(c)
- int c;
- {
- #ifdef FEAT_MBYTE
- if (enc_utf8 && c >= 0x100)
- return utf_printable(c);
- #endif
- return (c >= 0x100 || (c > 0 && (chartab[c] & CT_PRINT_CHAR)));
- }
-
- /*
- * Strict version of vim_isprintc(c), don't return TRUE if "c" is the head
- * byte of a double-byte character.
- */
- int
- vim_isprintc_strict(c)
- int c;
- {
- #ifdef FEAT_MBYTE
- if (enc_dbcs != 0 && c < 0x100 && MB_BYTE2LEN(c) > 1)
- return FALSE;
- if (enc_utf8 && c >= 0x100)
- return utf_printable(c);
- #endif
- return (c >= 0x100 || (c > 0 && (chartab[c] & CT_PRINT_CHAR)));
- }
-
- /*
- * like chartabsize(), but also check for line breaks on the screen
- */
- int
- lbr_chartabsize(s, col)
- unsigned char *s;
- colnr_T col;
- {
- #ifdef FEAT_LINEBREAK
- if (!curwin->w_p_lbr && *p_sbr == NUL)
- {
- #endif
- #ifdef FEAT_MBYTE
- if (curwin->w_p_wrap)
- return win_nolbr_chartabsize(curwin, s, col, NULL);
- #endif
- RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col)
- #ifdef FEAT_LINEBREAK
- }
- return win_lbr_chartabsize(curwin, s, col, NULL);
- #endif
- }
-
- /*
- * Call lbr_chartabsize() and advance the pointer.
- */
- int
- lbr_chartabsize_adv(s, col)
- char_u **s;
- colnr_T col;
- {
- int retval;
-
- retval = lbr_chartabsize(*s, col);
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- *s += (*mb_ptr2len_check)(*s);
- else
- #endif
- ++*s;
- return retval;
- }
-
- /*
- * This function is used very often, keep it fast!!!!
- *
- * If "headp" not NULL, set *headp to the size of what we for 'showbreak'
- * string at start of line. Warning: *headp is only set if it's a non-zero
- * value, init to 0 before calling.
- */
- /*ARGSUSED*/
- int
- win_lbr_chartabsize(wp, s, col, headp)
- win_T *wp;
- char_u *s;
- colnr_T col;
- int *headp;
- {
- #ifdef FEAT_LINEBREAK
- int c;
- int size;
- colnr_T col2;
- colnr_T colmax;
- int added;
- int numberextra;
- char_u *ps;
- int tab_corr = (*s == TAB);
-
- /*
- * No 'linebreak' and 'showbreak': return quickly.
- */
- if (!wp->w_p_lbr && *p_sbr == NUL)
- #endif
- {
- #ifdef FEAT_MBYTE
- if (wp->w_p_wrap)
- return win_nolbr_chartabsize(wp, s, col, headp);
- #endif
- RET_WIN_BUF_CHARTABSIZE(wp, wp->w_buffer, s, col)
- }
-
- #ifdef FEAT_LINEBREAK
- /*
- * First get normal size, without 'linebreak'
- */
- size = win_chartabsize(wp, s, col);
- c = *s;
-
- /*
- * If 'linebreak' set check at a blank before a non-blank if the line
- * needs a break here
- */
- if (wp->w_p_lbr
- && vim_isbreak(c)
- && !vim_isbreak(s[1])
- && !wp->w_p_list
- && wp->w_p_wrap
- # ifdef FEAT_VERTSPLIT
- && wp->w_width != 0
- # endif
- )
- {
- /*
- * Count all characters from first non-blank after a blank up to next
- * non-blank after a blank.
- */
- numberextra = win_col_off(wp);
- col2 = col;
- colmax = W_WIDTH(wp) - numberextra;
- if (col >= colmax)
- colmax += (((col - colmax)
- / (colmax + win_col_off2(wp))) + 1)
- * (colmax + win_col_off2(wp));
- for (;;)
- {
- ps = s;
- # ifdef FEAT_MBYTE
- if (has_mbyte)
- s += (*mb_ptr2len_check)(s);
- else
- # endif
- ++s;
- c = *s;
- if (!(c != NUL
- && (vim_isbreak(c)
- || (!vim_isbreak(c)
- && (col2 == col || !vim_isbreak(*ps))))))
- break;
-
- col2 += win_chartabsize(wp, s, col2);
- if (col2 >= colmax) /* doesn't fit */
- {
- size = colmax - col;
- tab_corr = FALSE;
- break;
- }
- }
- }
-
- /*
- * May have to add something for 'showbreak' string at start of line
- * Set *headp to the size of what we add.
- */
- added = 0;
- if (*p_sbr != NUL && wp->w_p_wrap && col != 0)
- {
- numberextra = win_col_off(wp);
- col += numberextra;
- if (col >= (colnr_T)W_WIDTH(wp))
- {
- col -= W_WIDTH(wp);
- numberextra = W_WIDTH(wp) - (numberextra - win_col_off2(wp));
- if (numberextra > 0)
- col = col % numberextra;
- }
- if (col == 0 || col + size > (colnr_T)W_WIDTH(wp))
- {
- added = (int)STRLEN(p_sbr);
- if (tab_corr)
- size += (added / wp->w_buffer->b_p_ts) * wp->w_buffer->b_p_ts;
- else
- size += added;
- if (col != 0)
- added = 0;
- }
- }
- if (headp != NULL)
- *headp = added;
- return size;
- #endif
- }
-
- #if defined(FEAT_MBYTE) || defined(PROTO)
- /*
- * Like win_lbr_chartabsize(), except that we know 'linebreak' is off and
- * 'wrap' is on. This means we need to check for a double-byte character that
- * doesn't fit at the end of the screen line.
- */
- static int
- win_nolbr_chartabsize(wp, s, col, headp)
- win_T *wp;
- char_u *s;
- colnr_T col;
- int *headp;
- {
- int n;
-
- if (*s == TAB && (!wp->w_p_list || lcs_tab1))
- {
- n = wp->w_buffer->b_p_ts;
- return (int)(n - (col % n));
- }
- n = ptr2cells(s);
- /* Add one cell for a double-width character in the last column of the
- * window, displayed with a ">". */
- if (n == 2 && MB_BYTE2LEN(*s) > 1 && in_win_border(wp, col))
- {
- if (headp != NULL)
- *headp = 1;
- return 3;
- }
- return n;
- }
-
- /*
- * Return TRUE if virtual column "vcol" is in the rightmost column of window
- * "wp".
- */
- int
- in_win_border(wp, vcol)
- win_T *wp;
- colnr_T vcol;
- {
- colnr_T width1; /* width of first line (after line number) */
- colnr_T width2; /* width of further lines */
-
- #ifdef FEAT_VERTSPLIT
- if (wp->w_width == 0) /* there is no border */
- return FALSE;
- #endif
- width1 = W_WIDTH(wp) - win_col_off(wp);
- if (vcol < width1 - 1)
- return FALSE;
- if (vcol == width1 - 1)
- return TRUE;
- width2 = width1 + win_col_off2(wp);
- return ((vcol - width1) % width2 == width2 - 1);
- }
- #endif /* FEAT_MBYTE */
-
- /*
- * Get virtual column number of pos.
- * start: on the first position of this character (TAB, ctrl)
- * cursor: where the cursor is on this character (first char, except for TAB)
- * end: on the last position of this character (TAB, ctrl)
- *
- * This is used very often, keep it fast!
- */
- void
- getvcol(wp, pos, start, cursor, end)
- win_T *wp;
- pos_T *pos;
- colnr_T *start;
- colnr_T *cursor;
- colnr_T *end;
- {
- colnr_T vcol;
- char_u *ptr; /* points to current char */
- char_u *posptr; /* points to char at pos->col */
- int incr;
- int head;
- int ts = wp->w_buffer->b_p_ts;
- int c;
-
- vcol = 0;
- ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE);
- posptr = ptr + pos->col;
-
- /*
- * This function is used very often, do some speed optimizations.
- * When 'list', 'linebreak' and 'showbreak' are not set use a simple loop.
- * Also use this when 'list' is set but tabs take their normal size.
- */
- if ((!wp->w_p_list || lcs_tab1 != NUL)
- #ifdef FEAT_LINEBREAK
- && !wp->w_p_lbr && *p_sbr == NUL
- #endif
- )
- {
- #ifndef FEAT_MBYTE
- head = 0;
- #endif
- for (;;)
- {
- #ifdef FEAT_MBYTE
- head = 0;
- #endif
- c = *ptr;
- /* make sure we don't go past the end of the line */
- if (c == NUL)
- {
- incr = 1; /* NUL at end of line only takes one column */
- break;
- }
- /* A tab gets expanded, depending on the current column */
- if (c == TAB)
- incr = ts - (vcol % ts);
- else
- {
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- {
- /* For utf-8, if the byte is >= 0x80, need to look at
- * further bytes to find the cell width. */
- if (enc_utf8 && c >= 0x80)
- incr = utf_ptr2cells(ptr);
- else
- incr = CHARSIZE(c);
-
- /* If a double-cell char doesn't fit at the end of a line
- * it wraps to the next line, it's like this char is three
- * cells wide. */
- if (incr == 2 && wp->w_p_wrap && in_win_border(wp, vcol))
- {
- ++incr;
- head = 1;
- }
- }
- else
- #endif
- incr = CHARSIZE(c);
- }
-
- if (ptr >= posptr) /* character at pos->col */
- break;
-
- vcol += incr;
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- ptr += (*mb_ptr2len_check)(ptr);
- else
- #endif
- ++ptr;
- }
- }
- else
- {
- for (;;)
- {
- /* A tab gets expanded, depending on the current column */
- head = 0;
- incr = win_lbr_chartabsize(wp, ptr, vcol, &head);
- /* make sure we don't go past the end of the line */
- if (*ptr == NUL)
- {
- incr = 1; /* NUL at end of line only takes one column */
- break;
- }
-
- if (ptr >= posptr) /* character at pos->col */
- break;
-
- vcol += incr;
- #ifdef FEAT_MBYTE
- if (has_mbyte)
- ptr += (*mb_ptr2len_check)(ptr);
- else
- #endif
- ++ptr;
- }
- }
- if (start != NULL)
- *start = vcol + head;
- if (end != NULL)
- *end = vcol + incr - 1;
- if (cursor != NULL)
- {
- if (*ptr == TAB
- && (State & NORMAL)
- && !wp->w_p_list
- && !virtual_active()
- #ifdef FEAT_VISUAL
- && !(VIsual_active && *p_sel == 'e')
- #endif
- )
- *cursor = vcol + incr - 1; /* cursor at end */
- else
- *cursor = vcol + head; /* cursor at start */
- }
- }
-
- /*
- * Get virtual cursor column in the current window, pretending 'list' is off.
- */
- colnr_T
- getvcol_nolist(posp)
- pos_T *posp;
- {
- int list_save = curwin->w_p_list;
- colnr_T vcol;
-
- curwin->w_p_list = FALSE;
- getvcol(curwin, posp, NULL, &vcol, NULL);
- curwin->w_p_list = list_save;
- return vcol;
- }
-
- #if defined(FEAT_VIRTUALEDIT) || defined(PROTO)
- /*
- * Get virtual column in virtual mode.
- */
- void
- getvvcol(wp, pos, start, cursor, end)
- win_T *wp;
- pos_T *pos;
- colnr_T *start;
- colnr_T *cursor;
- colnr_T *end;
- {
- colnr_T col;
- char_u *ptr;
-
- if (virtual_active())
- {
- /* For virtual mode, only want one value */
- getvcol(wp, pos, &col, NULL, NULL);
-
- if (pos->coladd > 0)
- {
- /* Adjust for multiwide char */
- ptr = ml_get(pos->lnum);
- if (pos->col <= STRLEN(ptr))
- {
- ptr += pos->col;
- if (*ptr != TAB && *ptr != NUL && ptr2cells(ptr) > 1)
- pos->coladd = 0;
- }
- col += pos->coladd;
- }
- if (start != NULL)
- *start = col;
- if (cursor != NULL)
- *cursor = col;
- if (end != NULL)
- *end = col;
- }
- else
- getvcol(wp, pos, start, cursor, end);
- }
- #endif
-
- #if defined(FEAT_VISUAL) || defined(PROTO)
- /*
- * Get the leftmost and rightmost virtual column of pos1 and pos2.
- * Used for Visual block mode.
- */
- void
- getvcols(wp, pos1, pos2, left, right)
- win_T *wp;
- pos_T *pos1, *pos2;
- colnr_T *left, *right;
- {
- colnr_T from1, from2, to1, to2;
-
- if (ltp(pos1, pos2))
- {
- getvvcol(wp, pos1, &from1, NULL, &to1);
- getvvcol(wp, pos2, &from2, NULL, &to2);
- }
- else
- {
- getvvcol(wp, pos2, &from1, NULL, &to1);
- getvvcol(wp, pos1, &from2, NULL, &to2);
- }
- if (from2 < from1)
- *left = from2;
- else
- *left = from1;
- if (to2 > to1)
- {
- if (*p_sel == 'e' && from2 - 1 >= to1)
- *right = from2 - 1;
- else
- *right = to2;
- }
- else
- *right = to1;
- }
- #endif
-
- /*
- * skipwhite: skip over ' ' and '\t'.
- */
- char_u *
- skipwhite(p)
- char_u *p;
- {
- while (vim_iswhite(*p)) /* skip to next non-white */
- ++p;
- return p;
- }
-
- /*
- * skipdigits: skip over digits;
- */
- char_u *
- skipdigits(p)
- char_u *p;
- {
- while (isdigit(*p)) /* skip to next non-digit */
- ++p;
- return p;
- }
-
- /*
- * vim_isdigit: version of isdigit() that can handle characters > 0x100.
- */
- int
- vim_isdigit(c)
- int c;
- {
- return (c > 0 && c < 0x100 && isdigit(c));
- }
-
- /*
- * skiptowhite: skip over text until ' ' or '\t' or NUL.
- */
- char_u *
- skiptowhite(p)
- char_u *p;
- {
- while (*p != ' ' && *p != '\t' && *p != NUL)
- ++p;
- return p;
- }
-
- #if defined(FEAT_LISTCMDS) || defined(PROTO)
- /*
- * skiptowhite_esc: Like skiptowhite(), but also skip escaped chars
- */
- char_u *
- skiptowhite_esc(p)
- char_u *p;
- {
- while (*p != ' ' && *p != '\t' && *p != NUL)
- {
- if ((*p == '\\' || *p == Ctrl_V) && *(p + 1) != NUL)
- ++p;
- ++p;
- }
- return p;
- }
- #endif
-
- /*
- * Getdigits: Get a number from a string and skip over it.
- * Note: the argument is a pointer to a char_u pointer!
- */
- long
- getdigits(pp)
- char_u **pp;
- {
- char_u *p;
- long retval;
-
- p = *pp;
- retval = atol((char *)p);
- if (*p == '-') /* skip negative sign */
- ++p;
- p = skipdigits(p); /* skip to next non-digit */
- *pp = p;
- return retval;
- }
-
- /*
- * Return TRUE if "lbuf" is empty or only contains blanks.
- */
- int
- vim_isblankline(lbuf)
- char_u *lbuf;
- {
- char_u *p;
-
- p = skipwhite(lbuf);
- return (*p == NUL || *p == '\r' || *p == '\n');
- }
-
- /*
- * Convert a string into a long and/or unsigned long, taking care of
- * hexadecimal and octal numbers.
- * If "hexp" is not NULL, returns a flag to indicate the type of the number:
- * 0 decimal
- * '0' octal
- * 'X' hex
- * 'x' hex
- * If "len" is not NULL, the length of the number in characters is returned.
- * If "nptr" is not NULL, the signed result is returned in it.
- * If "unptr" is not NULL, the unsigned result is returned in it.
- */
- void
- vim_str2nr(start, hexp, len, dooct, dohex, nptr, unptr)
- char_u *start;
- int *hexp; /* return: type of number 0 = decimal, 'x'
- or 'X' is hex, '0' = octal */
- int *len; /* return: detected length of number */
- int dooct; /* recognize octal number */
- int dohex; /* recognize hex number */
- long *nptr; /* return: signed result */
- unsigned long *unptr; /* return: unsigned result */
- {
- char_u *ptr = start;
- int hex = 0; /* default is decimal */
- int negative = FALSE;
- long n = 0;
- unsigned long un = 0;
-
- if (ptr[0] == '-')
- {
- negative = TRUE;
- ++ptr;
- }
-
- if (ptr[0] == '0') /* could be hex or octal */
- {
- hex = ptr[1];
- if (dohex && (hex == 'X' || hex == 'x') && isxdigit(ptr[2]))
- ptr += 2; /* hexadecimal */
- else
- {
- if (dooct && isdigit(hex))
- hex = '0'; /* octal */
- else
- hex = 0; /* 0 by itself is decimal */
- }
- }
-
- /*
- * Do the string-to-numeric conversion "manually" to avoid sscanf quirks.
- */
- if (hex)
- {
- if (hex == '0')
- {
- /* octal */
- while ('0' <= *ptr && *ptr <= '7')
- {
- n = 8 * n + (long)(*ptr - '0');
- un = 8 * un + (unsigned long)(*ptr - '0');
- ++ptr;
- }
- }
- else
- {
- /* hex */
- while (isxdigit(*ptr))
- {
- n = 16 * n + (long)hex2nr(*ptr);
- un = 16 * un + (unsigned long)hex2nr(*ptr);
- ++ptr;
- }
- }
- }
- else
- {
- /* decimal */
- while (isdigit(*ptr))
- {
- n = 10 * n + (long)(*ptr - '0');
- un = 10 * un + (unsigned long)(*ptr - '0');
- ++ptr;
- }
- }
-
- if (!hex && negative) /* account for leading '-' for decimal numbers */
- n = -n;
-
- if (hexp != NULL)
- *hexp = hex;
- if (len != NULL)
- *len = (int)(ptr - start);
- if (nptr != NULL)
- *nptr = n;
- if (unptr != NULL)
- *unptr = un;
- }
-
- /*
- * Return the value of a single hex character.
- * Only valid when the argument is '0' - '9', 'A' - 'F' or 'a' - 'f'.
- */
- int
- hex2nr(c)
- int c;
- {
- if (c >= 'a' && c <= 'f')
- return c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- return c - 'A' + 10;
- return c - '0';
- }
-
- #if defined(FEAT_TERMRESPONSE) || defined(PROTO)
- /*
- * Convert two hex characters to a byte.
- * Return -1 if one of the characters is not hex.
- */
- int
- hexhex2nr(p)
- char_u *p;
- {
- if (!isxdigit(p[0]) || !isxdigit(p[1]))
- return -1;
- return (hex2nr(p[0]) << 4) + hex2nr(p[1]);
- }
- #endif
-
- /*
- * Return TRUE if "str" starts with a backslash that should be removed.
- * For MS-DOS, WIN32 and OS/2 this is only done when the character after the
- * backslash is not a normal file name character.
- * '$' is a valid file name character, we don't remove the backslash before
- * it. This means it is not possible to use an environment variable after a
- * backslash. "C:\$VIM\doc" is taken literally, only "$VIM\doc" works.
- * Although "\ name" is valid, the backslash in "Program\ files" must be
- * removed. Assume a file name doesn't start with a space.
- * For multi-byte names, never remove a backslash before a non-ascii
- * character, assume that all multi-byte characters are valid file name
- * characters.
- */
- int
- rem_backslash(str)
- char_u *str;
- {
- #ifdef BACKSLASH_IN_FILENAME
- return (str[0] == '\\'
- # ifdef FEAT_MBYTE
- && str[1] < 0x80
- # endif
- && (str[1] == ' '
- || (str[1] != NUL
- && str[1] != '*'
- && str[1] != '?'
- && !vim_isfilec(str[1]))));
- #else
- return (str[0] == '\\' && str[1] != NUL);
- #endif
- }
-
- /*
- * Halve the number of backslashes in a file name argument.
- * For MS-DOS we only do this if the character after the backslash
- * is not a normal file character.
- */
- void
- backslash_halve(p)
- char_u *p;
- {
- for ( ; *p; ++p)
- if (rem_backslash(p))
- STRCPY(p, p + 1);
- }
-
- /*
- * backslash_halve() plus save the result in allocated memory.
- */
- char_u *
- backslash_halve_save(p)
- char_u *p;
- {
- char_u *res;
-
- res = vim_strsave(p);
- if (res == NULL)
- return p;
- backslash_halve(res);
- return res;
- }
-
- #if (defined(EBCDIC) && defined(FEAT_POSTSCRIPT)) || defined(PROTO)
- /*
- * Table for EBCDIC to ASCII conversion unashamedly taken from xxd.c!
- * The first 64 entries have been added to map control characters defined in
- * ascii.h
- */
- static char_u ebcdic2ascii_tab[256] =
- {
- 0000, 0001, 0002, 0003, 0004, 0011, 0006, 0177,
- 0010, 0011, 0012, 0013, 0014, 0015, 0016, 0017,
- 0020, 0021, 0022, 0023, 0024, 0012, 0010, 0027,
- 0030, 0031, 0032, 0033, 0033, 0035, 0036, 0037,
- 0040, 0041, 0042, 0043, 0044, 0045, 0046, 0047,
- 0050, 0051, 0052, 0053, 0054, 0055, 0056, 0057,
- 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
- 0070, 0071, 0072, 0073, 0074, 0075, 0076, 0077,
- 0040, 0240, 0241, 0242, 0243, 0244, 0245, 0246,
- 0247, 0250, 0325, 0056, 0074, 0050, 0053, 0174,
- 0046, 0251, 0252, 0253, 0254, 0255, 0256, 0257,
- 0260, 0261, 0041, 0044, 0052, 0051, 0073, 0176,
- 0055, 0057, 0262, 0263, 0264, 0265, 0266, 0267,
- 0270, 0271, 0313, 0054, 0045, 0137, 0076, 0077,
- 0272, 0273, 0274, 0275, 0276, 0277, 0300, 0301,
- 0302, 0140, 0072, 0043, 0100, 0047, 0075, 0042,
- 0303, 0141, 0142, 0143, 0144, 0145, 0146, 0147,
- 0150, 0151, 0304, 0305, 0306, 0307, 0310, 0311,
- 0312, 0152, 0153, 0154, 0155, 0156, 0157, 0160,
- 0161, 0162, 0136, 0314, 0315, 0316, 0317, 0320,
- 0321, 0345, 0163, 0164, 0165, 0166, 0167, 0170,
- 0171, 0172, 0322, 0323, 0324, 0133, 0326, 0327,
- 0330, 0331, 0332, 0333, 0334, 0335, 0336, 0337,
- 0340, 0341, 0342, 0343, 0344, 0135, 0346, 0347,
- 0173, 0101, 0102, 0103, 0104, 0105, 0106, 0107,
- 0110, 0111, 0350, 0351, 0352, 0353, 0354, 0355,
- 0175, 0112, 0113, 0114, 0115, 0116, 0117, 0120,
- 0121, 0122, 0356, 0357, 0360, 0361, 0362, 0363,
- 0134, 0237, 0123, 0124, 0125, 0126, 0127, 0130,
- 0131, 0132, 0364, 0365, 0366, 0367, 0370, 0371,
- 0060, 0061, 0062, 0063, 0064, 0065, 0066, 0067,
- 0070, 0071, 0372, 0373, 0374, 0375, 0376, 0377
- };
-
- /*
- * Convert a buffer worth of characters from EBCDIC to ASCII. Only useful if
- * wanting 7-bit ASCII characters out the other end.
- */
- void
- ebcdic2ascii(buffer, len)
- char_u *buffer;
- int len;
- {
- int i;
-
- for (i = 0; i < len; i++)
- buffer[i] = ebcdic2ascii_tab[buffer[i]];
- }
- #endif
-