ref: ccbb4844cfbdbf575c5f207be4e5f8ea1a9ced46
dir: /charset.c/
/* 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
if (enc_dbcs != 0)
for (c = 0; c < 256; ++c)
{
/* double-byte characters are probably word characters */
if (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 (VIM_ISDIGIT(*p))
c = getdigits(&p);
else
c = *p++;
c2 = -1;
if (*p == '-' && p[1] != NUL)
{
++p;
if (VIM_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;
}
/*
* Translate any special characters in buf[bufsize] in-place.
* The result is a string with only printable characters, but 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)(buf)) > 1)
len -= trs_len;
else
# endif
{
trs = transchar_byte(*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;
}
}
#if defined(FEAT_EVAL) || defined(FEAT_TITLE) || defined(FEAT_INS_EXPAND) \
|| 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;
char_u *p;
#ifdef FEAT_MBYTE
int l, len, c;
char_u hexbuf[11];
#endif
#ifdef FEAT_MBYTE
if (has_mbyte)
{
/* Compute the length of the result, taking account of unprintable
* multi-byte characters. */
len = 0;
p = s;
while (*p != NUL)
{
if ((l = (*mb_ptr2len)(p)) > 1)
{
c = (*mb_ptr2char)(p);
p += l;
if (vim_isprintc(c))
len += l;
else
{
transchar_hex(hexbuf, c);
len += (int)STRLEN(hexbuf);
}
}
else
{
l = byte2cells(*p++);
if (l > 0)
len += l;
else
len += 4; /* illegal byte sequence */
}
}
res = alloc((unsigned)(len + 1));
}
else
#endif
res = alloc((unsigned)(vim_strsize(s) + 1));
if (res != NULL)
{
*res = NUL;
p = s;
while (*p != NUL)
{
#ifdef FEAT_MBYTE
if (has_mbyte && (l = (*mb_ptr2len)(p)) > 1)
{
c = (*mb_ptr2char)(p);
if (vim_isprintc(c))
STRNCAT(res, p, l); /* append printable multi-byte char */
else
transchar_hex(res + STRLEN(res), c);
p += l;
}
else
#endif
STRCAT(res, transchar_byte(*p++));
}
}
return res;
}
#endif
#if defined(FEAT_SYN_HL) || defined(FEAT_INS_EXPAND) || defined(PROTO)
/*
* Convert the string "str[orglen]" to do ignore-case comparing. Uses the
* current locale.
* When "buf" is NULL returns an allocated string (NULL for out-of-memory).
* Otherwise puts the result in "buf[buflen]".
*/
char_u *
str_foldcase(str, orglen, buf, buflen)
char_u *str;
int orglen;
char_u *buf;
int buflen;
{
garray_T ga;
int i;
int len = orglen;
#define GA_CHAR(i) ((char_u *)ga.ga_data)[i]
#define GA_PTR(i) ((char_u *)ga.ga_data + i)
#define STR_CHAR(i) (buf == NULL ? GA_CHAR(i) : buf[i])
#define STR_PTR(i) (buf == NULL ? GA_PTR(i) : buf + i)
/* Copy "str" into "buf" or allocated memory, unmodified. */
if (buf == NULL)
{
ga_init2(&ga, 1, 10);
if (ga_grow(&ga, len + 1) == FAIL)
return NULL;
mch_memmove(ga.ga_data, str, (size_t)len);
ga.ga_len = len;
}
else
{
if (len >= buflen) /* Ugly! */
len = buflen - 1;
mch_memmove(buf, str, (size_t)len);
}
if (buf == NULL)
GA_CHAR(len) = NUL;
else
buf[len] = NUL;
/* Make each character lower case. */
i = 0;
while (STR_CHAR(i) != NUL)
{
#ifdef FEAT_MBYTE
if (enc_utf8 || (has_mbyte && MB_BYTE2LEN(STR_CHAR(i)) > 1))
{
if (enc_utf8)
{
int c, lc;
c = utf_ptr2char(STR_PTR(i));
lc = utf_tolower(c);
if (c != lc)
{
int ol = utf_char2len(c);
int nl = utf_char2len(lc);
/* If the byte length changes need to shift the following
* characters forward or backward. */
if (ol != nl)
{
if (nl > ol)
{
if (buf == NULL ? ga_grow(&ga, nl - ol + 1) == FAIL
: len + nl - ol >= buflen)
{
/* out of memory, keep old char */
lc = c;
nl = ol;
}
}
if (ol != nl)
{
if (buf == NULL)
{
mch_memmove(GA_PTR(i) + nl, GA_PTR(i) + ol,
STRLEN(GA_PTR(i) + ol) + 1);
ga.ga_len += nl - ol;
}
else
{
mch_memmove(buf + i + nl, buf + i + ol,
STRLEN(buf + i + ol) + 1);
len += nl - ol;
}
}
}
(void)utf_char2bytes(lc, STR_PTR(i));
}
}
/* skip to next multi-byte char */
i += (*mb_ptr2len)(STR_PTR(i));
}
else
#endif
{
if (buf == NULL)
GA_CHAR(i) = TOLOWER_LOC(GA_CHAR(i));
else
buf[i] = TOLOWER_LOC(buf[i]);
++i;
}
}
if (buf == NULL)
return (char_u *)ga.ga_data;
return buf;
}
#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.
* Also doesn't work for the first byte of a multi-byte, "c" must be a
* character!
*/
static char_u transchar_buf[7];
char_u *
transchar(c)
int c;
{
int i;
i = 0;
if (IS_SPECIAL(c)) /* special key code, display as ~@ char */
{
transchar_buf[0] = '~';
transchar_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 */
transchar_buf[i] = c;
transchar_buf[i + 1] = NUL;
}
else
transchar_nonprint(transchar_buf + i, c);
return transchar_buf;
}
#if defined(FEAT_MBYTE) || defined(PROTO)
/*
* Like transchar(), but called with a byte instead of a character. Checks
* for an illegal UTF-8 byte.
*/
char_u *
transchar_byte(c)
int c;
{
if (enc_utf8 && c >= 0x80)
{
transchar_nonprint(transchar_buf, c);
return transchar_buf;
}
return transchar(c);
}
#endif
/*
* 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 == CAR && 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;
{
return vim_strnsize(s, (int)MAXCOL);
}
/*
* Return the number of characters string "s[len]" will take on the screen,
* counting TABs as two characters: "^I".
*/
int
vim_strnsize(s, len)
char_u *s;
int len;
{
int size = 0;
while (*s != NUL && --len >= 0)
{
#ifdef FEAT_MBYTE
if (has_mbyte)
{
int l = (*mb_ptr2len)(s);
size += ptr2cells(s);
s += l;
len -= l - 1;
}
else
#endif
size += byte2cells(*s++);
}
return size;
}
/*
* 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 && (len == MAXCOL || s < p + len); mb_ptr_adv(s))
col += win_lbr_chartabsize(wp, s, col, NULL);
return (int)col;
}
/*
* Return TRUE if 'c' is a normal identifier character:
* Letters and characters from the '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);
mb_ptr_adv(*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;
# ifdef FEAT_MBYTE
int mb_added = 0;
# else
# define mb_added 0
# endif
int numberextra;
char_u *ps;
int tab_corr = (*s == TAB);
int n;
/*
* 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)
{
n = colmax + win_col_off2(wp);
if (n > 0)
colmax += (((col - colmax) / n) + 1) * n;
}
for (;;)
{
ps = s;
mb_ptr_adv(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;
}
}
}
# ifdef FEAT_MBYTE
else if (has_mbyte && size == 2 && MB_BYTE2LEN(*s) > 1
&& wp->w_p_wrap && in_win_border(wp, col))
{
++size; /* Count the ">" in the last column. */
mb_added = 1;
}
# endif
/*
* 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 + mb_added;
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 = vim_strsize(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 + mb_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;
mb_ptr_adv(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;
mb_ptr_adv(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' || ltoreq(*pos, VIsual)))
#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;
colnr_T coladd;
colnr_T endadd;
# ifdef FEAT_MBYTE
char_u *ptr;
# endif
if (virtual_active())
{
/* For virtual mode, only want one value */
getvcol(wp, pos, &col, NULL, NULL);
coladd = pos->coladd;
endadd = 0;
# ifdef FEAT_MBYTE
/* Cannot put the cursor on part of a wide character. */
ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE);
if (pos->col < STRLEN(ptr))
{
int c = (*mb_ptr2char)(ptr + pos->col);
if (c != TAB && vim_isprintc(c))
{
endadd = char2cells(c) - 1;
if (coladd > endadd) /* past end of line */
endadd = 0;
else
coladd = 0;
}
}
# endif
col += coladd;
if (start != NULL)
*start = col;
if (cursor != NULL)
*cursor = col;
if (end != NULL)
*end = col + endadd;
}
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;
}
/*
* skip over digits
*/
char_u *
skipdigits(p)
char_u *p;
{
while (VIM_ISDIGIT(*p)) /* skip to next non-digit */
++p;
return p;
}
#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL) || defined(PROTO)
/*
* skip over digits and hex characters
*/
char_u *
skiphex(p)
char_u *p;
{
while (vim_isxdigit(*p)) /* skip to next non-digit */
++p;
return p;
}
#endif
#if defined(FEAT_EX_EXTRA) || defined(PROTO)
/*
* skip to digit (or NUL after the string)
*/
char_u *
skiptodigit(p)
char_u *p;
{
while (*p != NUL && !VIM_ISDIGIT(*p)) /* skip to next digit */
++p;
return p;
}
/*
* skip to hex character (or NUL after the string)
*/
char_u *
skiptohex(p)
char_u *p;
{
while (*p != NUL && !vim_isxdigit(*p)) /* skip to next digit */
++p;
return p;
}
#endif
/*
* Variant of isdigit() that can handle characters > 0x100.
* We don't use isdigit() here, because on some systems it also considers
* superscript 1 to be a digit.
* Use the VIM_ISDIGIT() macro for simple arguments.
*/
int
vim_isdigit(c)
int c;
{
return (c >= '0' && c <= '9');
}
/*
* Variant of isxdigit() that can handle characters > 0x100.
* We don't use isxdigit() here, because on some systems it also considers
* superscript 1 to be a digit.
*/
int
vim_isxdigit(c)
int c;
{
return (c >= '0' && c <= '9')
|| (c >= 'a' && c <= 'f')
|| (c >= 'A' && c <= 'F');
}
#if defined(FEAT_MBYTE) || defined(PROTO)
/*
* Vim's own character class functions. These exist because many library
* islower()/toupper() etc. do not work properly: they crash when used with
* invalid values or can't handle latin1 when the locale is C.
* Speed is most important here.
*/
#define LATIN1LOWER 'l'
#define LATIN1UPPER 'U'
static char_u latin1flags[257] = " UUUUUUUUUUUUUUUUUUUUUUUUUU llllllllllllllllllllllllll UUUUUUUUUUUUUUUUUUUUUUU UUUUUUUllllllllllllllllllllllll llllllll";
static char_u latin1upper[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xf7\xd8\xd9\xda\xdb\xdc\xdd\xde\xff";
static char_u latin1lower[257] = " !\"#$%&'()*+,-./0123456789:;<=>?@abcdefghijklmnopqrstuvwxyz[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xd7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff";
int
vim_islower(c)
int c;
{
if (c <= '@')
return FALSE;
if (c >= 0x80)
{
if (enc_utf8)
return utf_islower(c);
if (c >= 0x100)
{
#ifdef HAVE_ISWLOWER
if (has_mbyte)
return iswlower(c);
#endif
/* islower() can't handle these chars and may crash */
return FALSE;
}
if (enc_latin1like)
return (latin1flags[c] & LATIN1LOWER) == LATIN1LOWER;
}
return islower(c);
}
int
vim_isupper(c)
int c;
{
if (c <= '@')
return FALSE;
if (c >= 0x80)
{
if (enc_utf8)
return utf_isupper(c);
if (c >= 0x100)
{
#ifdef HAVE_ISWUPPER
if (has_mbyte)
return iswupper(c);
#endif
/* islower() can't handle these chars and may crash */
return FALSE;
}
if (enc_latin1like)
return (latin1flags[c] & LATIN1UPPER) == LATIN1UPPER;
}
return isupper(c);
}
int
vim_toupper(c)
int c;
{
if (c <= '@')
return c;
if (c >= 0x80)
{
if (enc_utf8)
return utf_toupper(c);
if (c >= 0x100)
{
#ifdef HAVE_TOWUPPER
if (has_mbyte)
return towupper(c);
#endif
/* toupper() can't handle these chars and may crash */
return c;
}
if (enc_latin1like)
return latin1upper[c];
}
return TOUPPER_LOC(c);
}
int
vim_tolower(c)
int c;
{
if (c <= '@')
return c;
if (c >= 0x80)
{
if (enc_utf8)
return utf_tolower(c);
if (c >= 0x100)
{
#ifdef HAVE_TOWLOWER
if (has_mbyte)
return towlower(c);
#endif
/* tolower() can't handle these chars and may crash */
return c;
}
if (enc_latin1like)
return latin1lower[c];
}
return TOLOWER_LOC(c);
}
#endif
/*
* 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(FEAT_SIGNS) || defined(FEAT_SNIFF) \
|| 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. Accepts a '-' sign.
* 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.
* If "unptr" is not NULL, the unsigned result is returned in it.
* If "dooct" is non-zero recognize octal numbers, when > 1 always assume
* octal number.
* If "dohex" is non-zero recognize hex numbers, when > 1 always assume
* hex number.
*/
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;
unsigned long un = 0;
int n;
if (ptr[0] == '-')
{
negative = TRUE;
++ptr;
}
/* Recognize hex and octal. */
if (ptr[0] == '0' && ptr[1] != '8' && ptr[1] != '9')
{
hex = ptr[1];
if (dohex && (hex == 'X' || hex == 'x') && vim_isxdigit(ptr[2]))
ptr += 2; /* hexadecimal */
else
{
hex = 0; /* default is decimal */
if (dooct)
{
/* Don't interpret "0", "08" or "0129" as octal. */
for (n = 1; VIM_ISDIGIT(ptr[n]); ++n)
{
if (ptr[n] > '7')
{
hex = 0; /* can't be octal */
break;
}
if (ptr[n] > '0')
hex = '0'; /* assume octal */
}
}
}
}
/*
* Do the string-to-numeric conversion "manually" to avoid sscanf quirks.
*/
if (hex == '0' || dooct > 1)
{
/* octal */
while ('0' <= *ptr && *ptr <= '7')
{
un = 8 * un + (unsigned long)(*ptr - '0');
++ptr;
}
}
else if (hex != 0 || dohex > 1)
{
/* hex */
while (vim_isxdigit(*ptr))
{
un = 16 * un + (unsigned long)hex2nr(*ptr);
++ptr;
}
}
else
{
/* decimal */
while (VIM_ISDIGIT(*ptr))
{
un = 10 * un + (unsigned long)(*ptr - '0');
++ptr;
}
}
if (hexp != NULL)
*hexp = hex;
if (len != NULL)
*len = (int)(ptr - start);
if (nptr != NULL)
{
if (negative) /* account for leading '-' for decimal numbers */
*nptr = -(long)un;
else
*nptr = (long)un;
}
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(FEAT_GUI_GTK) && defined(FEAT_WINDOWS)) || 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 (!vim_isxdigit(p[0]) || !vim_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