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vim/src/charset.c
Bram Moolenaar 4b96df5a01 patch 8.2.0156: various typos in source files and tests 
Problem:    Various typos in source files and tests.
Solution:   Fix the typos. (Emir Sari, closes #5532)
2020-01-26 22:00:26 +01:00

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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
#include "vim.h"
#if defined(HAVE_WCHAR_H)
# include <wchar.h> // for towupper() and towlower()
#endif
static int win_nolbr_chartabsize(win_T *wp, char_u *s, colnr_T col, int *headp);
static unsigned nr2hex(unsigned 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)))
// table used below, see init_chartab() for an explanation
static char_u g_chartab[256];
/*
* Flags for g_chartab[].
*/
#define CT_CELL_MASK 0x07 // mask: nr of display cells (1, 2 or 4)
#define CT_PRINT_CHAR 0x10 // flag: set for printable chars
#define CT_ID_CHAR 0x20 // flag: set for ID chars
#define CT_FNAME_CHAR 0x40 // flag: set for file name chars
static int in_win_border(win_T *wp, colnr_T vcol);
/*
* Fill g_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 g_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 g_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(void)
{
return buf_init_chartab(curbuf, TRUE);
}
int
buf_init_chartab(
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 < ' ')
g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2;
#ifdef EBCDIC
while (c < 255)
#else
while (c <= '~')
#endif
g_chartab[c++] = 1 + CT_PRINT_CHAR;
while (c < 256)
{
// UTF-8: bytes 0xa0 - 0xff are printable (latin1)
if (enc_utf8 && c >= 0xa0)
g_chartab[c++] = CT_PRINT_CHAR + 1;
// euc-jp characters starting with 0x8e are single width
else if (enc_dbcs == DBCS_JPNU && c == 0x8e)
g_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)
g_chartab[c++] = CT_PRINT_CHAR + 2;
else
// the rest is unprintable by default
g_chartab[c++] = (dy_flags & DY_UHEX) ? 4 : 2;
}
// 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))
g_chartab[c] |= CT_FNAME_CHAR;
}
/*
* Init word char flags all to FALSE
*/
vim_memset(buf->b_chartab, 0, (size_t)32);
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);
}
#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
if (has_mbyte)
c = mb_ptr2char_adv(&p);
else
c = *p++;
c2 = -1;
if (*p == '-' && p[1] != NUL)
{
++p;
if (VIM_ISDIGIT(*p))
c2 = getdigits(&p);
else
if (has_mbyte)
c2 = mb_ptr2char_adv(&p);
else
c2 = *p++;
}
if (c <= 0 || c >= 256 || (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)
{
// Use the MB_ functions here, because isalpha() doesn't
// work properly when 'encoding' is "latin1" and the locale is
// "C".
if (!do_isalpha || MB_ISLOWER(c) || MB_ISUPPER(c))
{
if (i == 0) // (re)set ID flag
{
if (tilde)
g_chartab[c] &= ~CT_ID_CHAR;
else
g_chartab[c] |= CT_ID_CHAR;
}
else if (i == 1) // (re)set printable
{
if ((c < ' '
#ifndef EBCDIC
|| c > '~'
#endif
// For double-byte we keep the cell width, so
// that we can detect it from the first byte.
) && !(enc_dbcs && MB_BYTE2LEN(c) == 2))
{
if (tilde)
{
g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK)
+ ((dy_flags & DY_UHEX) ? 4 : 2);
g_chartab[c] &= ~CT_PRINT_CHAR;
}
else
{
g_chartab[c] = (g_chartab[c] & ~CT_CELL_MASK) + 1;
g_chartab[c] |= CT_PRINT_CHAR;
}
}
}
else if (i == 2) // (re)set fname flag
{
if (tilde)
g_chartab[c] &= ~CT_FNAME_CHAR;
else
g_chartab[c] |= CT_FNAME_CHAR;
}
else // i == 3 (re)set keyword flag
{
if (tilde)
RESET_CHARTAB(buf, c);
else
SET_CHARTAB(buf, c);
}
}
++c;
}
c = *p;
p = skip_to_option_part(p);
if (c == ',' && *p == NUL)
// Trailing comma is not allowed.
return FAIL;
}
}
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(
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)
{
// Assume a multi-byte character doesn't need translation.
if (has_mbyte && (trs_len = (*mb_ptr2len)(buf)) > 1)
len -= trs_len;
else
{
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;
}
}
/*
* Translate a string into allocated memory, replacing special chars with
* printable chars. Returns NULL when out of memory.
*/
char_u *
transstr(char_u *s)
{
char_u *res;
char_u *p;
int l, len, c;
char_u hexbuf[11];
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(len + 1);
}
else
res = alloc(vim_strsize(s) + 1);
if (res != NULL)
{
*res = NUL;
p = s;
while (*p != NUL)
{
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
STRCAT(res, transchar_byte(*p++));
}
}
return res;
}
/*
* 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(
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)
{
if (enc_utf8 || (has_mbyte && MB_BYTE2LEN(STR_CHAR(i)) > 1))
{
if (enc_utf8)
{
int c = utf_ptr2char(STR_PTR(i));
int olen = utf_ptr2len(STR_PTR(i));
int lc = utf_tolower(c);
// Only replace the character when it is not an invalid
// sequence (ASCII character or more than one byte) and
// utf_tolower() doesn't return the original character.
if ((c < 0x80 || olen > 1) && c != lc)
{
int nlen = utf_char2len(lc);
// If the byte length changes need to shift the following
// characters forward or backward.
if (olen != nlen)
{
if (nlen > olen)
{
if (buf == NULL
? ga_grow(&ga, nlen - olen + 1) == FAIL
: len + nlen - olen >= buflen)
{
// out of memory, keep old char
lc = c;
nlen = olen;
}
}
if (olen != nlen)
{
if (buf == NULL)
{
STRMOVE(GA_PTR(i) + nlen, GA_PTR(i) + olen);
ga.ga_len += nlen - olen;
}
else
{
STRMOVE(buf + i + nlen, buf + i + olen);
len += nlen - olen;
}
}
}
(void)utf_char2bytes(lc, STR_PTR(i));
}
}
// skip to next multi-byte char
i += (*mb_ptr2len)(STR_PTR(i));
}
else
{
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;
}
/*
* Catch 22: g_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 g_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(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
)) || (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;
}
/*
* Like transchar(), but called with a byte instead of a character. Checks
* for an illegal UTF-8 byte.
*/
char_u *
transchar_byte(int c)
{
if (enc_utf8 && c >= 0x80)
{
transchar_nonprint(transchar_buf, c);
return transchar_buf;
}
return transchar(c);
}
/*
* 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(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;
}
else if (enc_utf8 && c >= 0x80)
{
transchar_hex(buf, c);
}
#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(char_u *buf, int c)
{
int i = 0;
buf[0] = '<';
if (c > 255)
{
buf[++i] = nr2hex((unsigned)c >> 12);
buf[++i] = nr2hex((unsigned)c >> 8);
}
buf[++i] = nr2hex((unsigned)c >> 4);
buf[++i] = nr2hex((unsigned)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 unsigned
nr2hex(unsigned 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(int b)
{
if (enc_utf8 && b >= 0x80)
return 0;
return (g_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(int c)
{
if (IS_SPECIAL(c))
return char2cells(K_SECOND(c)) + 2;
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;
}
}
return (g_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(char_u *p)
{
// 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.
return (g_chartab[*p] & CT_CELL_MASK);
}
/*
* Return the number of character cells string "s" will take on the screen,
* counting TABs as two characters: "^I".
*/
int
vim_strsize(char_u *s)
{
return vim_strnsize(s, (int)MAXCOL);
}
/*
* Return the number of character cells string "s[len]" will take on the
* screen, counting TABs as two characters: "^I".
*/
int
vim_strnsize(char_u *s, int len)
{
int size = 0;
while (*s != NUL && --len >= 0)
if (has_mbyte)
{
int l = (*mb_ptr2len)(s);
size += ptr2cells(s);
s += l;
len -= l - 1;
}
else
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.
*/
#ifdef FEAT_VARTABS
# define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \
if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \
{ \
return tabstop_padding(col, (buf)->b_p_ts, (buf)->b_p_vts_array); \
} \
else \
return ptr2cells(p);
#else
# 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);
#endif
int
chartabsize(char_u *p, colnr_T col)
{
RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, p, col)
}
#ifdef FEAT_LINEBREAK
static int
win_chartabsize(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(char_u *s)
{
return linetabsize_col(0, s);
}
/*
* Like linetabsize(), but starting at column "startcol".
*/
int
linetabsize_col(int startcol, char_u *s)
{
colnr_T col = startcol;
char_u *line = s; // pointer to start of line, for breakindent
while (*s != NUL)
col += lbr_chartabsize_adv(line, &s, col);
return (int)col;
}
/*
* Like linetabsize(), but for a given window instead of the current one.
*/
int
win_linetabsize(win_T *wp, char_u *line, colnr_T len)
{
colnr_T col = 0;
char_u *s;
for (s = line; *s != NUL && (len == MAXCOL || s < line + len);
MB_PTR_ADV(s))
col += win_lbr_chartabsize(wp, line, 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(int c)
{
return (c > 0 && c < 0x100 && (g_chartab[c] & CT_ID_CHAR));
}
/*
* return TRUE if 'c' is a keyword character: Letters and characters from
* 'iskeyword' option for the current buffer.
* For multi-byte characters mb_get_class() is used (builtin rules).
*/
int
vim_iswordc(int c)
{
return vim_iswordc_buf(c, curbuf);
}
int
vim_iswordc_buf(int c, buf_T *buf)
{
if (c >= 0x100)
{
if (enc_dbcs != 0)
return dbcs_class((unsigned)c >> 8, (unsigned)(c & 0xff)) >= 2;
if (enc_utf8)
return utf_class_buf(c, buf) >= 2;
return FALSE;
}
return (c > 0 && GET_CHARTAB(buf, c) != 0);
}
/*
* Just like vim_iswordc() but uses a pointer to the (multi-byte) character.
*/
int
vim_iswordp(char_u *p)
{
return vim_iswordp_buf(p, curbuf);
}
int
vim_iswordp_buf(char_u *p, buf_T *buf)
{
int c = *p;
if (has_mbyte && MB_BYTE2LEN(c) > 1)
c = (*mb_ptr2char)(p);
return vim_iswordc_buf(c, buf);
}
/*
* return TRUE if 'c' is a valid file-name character
* Assume characters above 0x100 are valid (multi-byte).
*/
int
vim_isfilec(int c)
{
return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_FNAME_CHAR)));
}
/*
* return TRUE if 'c' is a valid file-name character or a wildcard character
* Assume characters above 0x100 are valid (multi-byte).
* Explicitly interpret ']' as a wildcard character as mch_has_wildcard("]")
* returns false.
*/
int
vim_isfilec_or_wc(int c)
{
char_u buf[2];
buf[0] = (char_u)c;
buf[1] = NUL;
return vim_isfilec(c) || c == ']' || mch_has_wildcard(buf);
}
/*
* Return TRUE if 'c' is a printable character.
* Assume characters above 0x100 are printable (multi-byte), except for
* Unicode.
*/
int
vim_isprintc(int c)
{
if (enc_utf8 && c >= 0x100)
return utf_printable(c);
return (c >= 0x100 || (c > 0 && (g_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(int c)
{
if (enc_dbcs != 0 && c < 0x100 && MB_BYTE2LEN(c) > 1)
return FALSE;
if (enc_utf8 && c >= 0x100)
return utf_printable(c);
return (c >= 0x100 || (c > 0 && (g_chartab[c] & CT_PRINT_CHAR)));
}
/*
* like chartabsize(), but also check for line breaks on the screen
*/
int
lbr_chartabsize(
char_u *line UNUSED, // start of the line
unsigned char *s,
colnr_T col)
{
#ifdef FEAT_LINEBREAK
if (!curwin->w_p_lbr && *get_showbreak_value(curwin) == NUL
&& !curwin->w_p_bri)
{
#endif
if (curwin->w_p_wrap)
return win_nolbr_chartabsize(curwin, s, col, NULL);
RET_WIN_BUF_CHARTABSIZE(curwin, curbuf, s, col)
#ifdef FEAT_LINEBREAK
}
return win_lbr_chartabsize(curwin, line == NULL ? s : line, s, col, NULL);
#endif
}
/*
* Call lbr_chartabsize() and advance the pointer.
*/
int
lbr_chartabsize_adv(
char_u *line, // start of the line
char_u **s,
colnr_T col)
{
int retval;
retval = lbr_chartabsize(line, *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.
*/
int
win_lbr_chartabsize(
win_T *wp,
char_u *line UNUSED, // start of the line
char_u *s,
colnr_T col,
int *headp UNUSED)
{
#ifdef FEAT_LINEBREAK
int c;
int size;
colnr_T col2;
colnr_T col_adj = 0; // col + screen size of tab
colnr_T colmax;
int added;
int mb_added = 0;
int numberextra;
char_u *ps;
int tab_corr = (*s == TAB);
int n;
char_u *sbr;
/*
* No 'linebreak', 'showbreak' and 'breakindent': return quickly.
*/
if (!wp->w_p_lbr && !wp->w_p_bri && *get_showbreak_value(wp) == NUL)
#endif
{
if (wp->w_p_wrap)
return win_nolbr_chartabsize(wp, s, col, headp);
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 (tab_corr)
col_adj = size - 1;
/*
* 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((int)s[1])
&& wp->w_p_wrap
&& wp->w_width != 0)
{
/*
* 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 = (colnr_T)(wp->w_width - numberextra - col_adj);
if (col >= colmax)
{
colmax += col_adj;
n = colmax + win_col_off2(wp);
if (n > 0)
colmax += (((col - colmax) / n) + 1) * n - col_adj;
}
for (;;)
{
ps = s;
MB_PTR_ADV(s);
c = *s;
if (!(c != NUL
&& (VIM_ISBREAK(c)
|| (!VIM_ISBREAK(c)
&& (col2 == col || !VIM_ISBREAK((int)*ps))))))
break;
col2 += win_chartabsize(wp, s, col2);
if (col2 >= colmax) // doesn't fit
{
size = colmax - col + col_adj;
break;
}
}
}
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;
}
/*
* May have to add something for 'breakindent' and/or 'showbreak'
* string at start of line.
* Set *headp to the size of what we add.
*/
added = 0;
sbr = get_showbreak_value(wp);
if ((*sbr != NUL || wp->w_p_bri) && wp->w_p_wrap && col != 0)
{
colnr_T sbrlen = 0;
int numberwidth = win_col_off(wp);
numberextra = numberwidth;
col += numberextra + mb_added;
if (col >= (colnr_T)wp->w_width)
{
col -= wp->w_width;
numberextra = wp->w_width - (numberextra - win_col_off2(wp));
if (col >= numberextra && numberextra > 0)
col %= numberextra;
if (*sbr != NUL)
{
sbrlen = (colnr_T)MB_CHARLEN(sbr);
if (col >= sbrlen)
col -= sbrlen;
}
if (col >= numberextra && numberextra > 0)
col = col % numberextra;
else if (col > 0 && numberextra > 0)
col += numberwidth - win_col_off2(wp);
numberwidth -= win_col_off2(wp);
}
if (col == 0 || col + size + sbrlen > (colnr_T)wp->w_width)
{
added = 0;
if (*sbr != NUL)
{
if (size + sbrlen + numberwidth > (colnr_T)wp->w_width)
{
// calculate effective window width
int width = (colnr_T)wp->w_width - sbrlen - numberwidth;
int prev_width = col
? ((colnr_T)wp->w_width - (sbrlen + col)) : 0;
if (width <= 0)
width = (colnr_T)1;
added += ((size - prev_width) / width) * vim_strsize(sbr);
if ((size - prev_width) % width)
// wrapped, add another length of 'sbr'
added += vim_strsize(sbr);
}
else
added += vim_strsize(sbr);
}
if (wp->w_p_bri)
added += get_breakindent_win(wp, line);
size += added;
if (col != 0)
added = 0;
}
}
if (headp != NULL)
*headp = added + mb_added;
return size;
#endif
}
/*
* 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(
win_T *wp,
char_u *s,
colnr_T col,
int *headp)
{
int n;
if (*s == TAB && (!wp->w_p_list || lcs_tab1))
{
# ifdef FEAT_VARTABS
return tabstop_padding(col, wp->w_buffer->b_p_ts,
wp->w_buffer->b_p_vts_array);
# else
n = wp->w_buffer->b_p_ts;
return (int)(n - (col % n));
# endif
}
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".
*/
static int
in_win_border(win_T *wp, colnr_T vcol)
{
int width1; // width of first line (after line number)
int width2; // width of further lines
if (wp->w_width == 0) // there is no border
return FALSE;
width1 = wp->w_width - win_col_off(wp);
if ((int)vcol < width1 - 1)
return FALSE;
if ((int)vcol == width1 - 1)
return TRUE;
width2 = width1 + win_col_off2(wp);
if (width2 <= 0)
return FALSE;
return ((vcol - width1) % width2 == width2 - 1);
}
/*
* 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(
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
char_u *line; // start of the line
int incr;
int head;
#ifdef FEAT_VARTABS
int *vts = wp->w_buffer->b_p_vts_array;
#endif
int ts = wp->w_buffer->b_p_ts;
int c;
vcol = 0;
line = ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE);
if (pos->col == MAXCOL)
posptr = NULL; // continue until the NUL
else
{
// Special check for an empty line, which can happen on exit, when
// ml_get_buf() always returns an empty string.
if (*ptr == NUL)
pos->col = 0;
posptr = ptr + pos->col;
if (has_mbyte)
// always start on the first byte
posptr -= (*mb_head_off)(line, posptr);
}
/*
* This function is used very often, do some speed optimizations.
* When 'list', 'linebreak', 'showbreak' and 'breakindent' 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 && *get_showbreak_value(wp) == NUL && !wp->w_p_bri
#endif
)
{
for (;;)
{
head = 0;
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)
#ifdef FEAT_VARTABS
incr = tabstop_padding(vcol, ts, vts);
#else
incr = ts - (vcol % ts);
#endif
else
{
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 = g_chartab[c] & CT_CELL_MASK;
// 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 && MB_BYTE2LEN(*ptr) > 1
&& in_win_border(wp, vcol))
{
++incr;
head = 1;
}
}
else
incr = g_chartab[c] & CT_CELL_MASK;
}
if (posptr != NULL && 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, line, 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 (posptr != NULL && 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()
&& !(VIsual_active
&& (*p_sel == 'e' || LTOREQ_POS(*pos, VIsual)))
)
*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(pos_T *posp)
{
int list_save = curwin->w_p_list;
colnr_T vcol;
curwin->w_p_list = FALSE;
if (posp->coladd)
getvvcol(curwin, posp, NULL, &vcol, NULL);
else
getvcol(curwin, posp, NULL, &vcol, NULL);
curwin->w_p_list = list_save;
return vcol;
}
/*
* Get virtual column in virtual mode.
*/
void
getvvcol(
win_T *wp,
pos_T *pos,
colnr_T *start,
colnr_T *cursor,
colnr_T *end)
{
colnr_T col;
colnr_T coladd;
colnr_T endadd;
char_u *ptr;
if (virtual_active())
{
// For virtual mode, only want one value
getvcol(wp, pos, &col, NULL, NULL);
coladd = pos->coladd;
endadd = 0;
// Cannot put the cursor on part of a wide character.
ptr = ml_get_buf(wp->w_buffer, pos->lnum, FALSE);
if (pos->col < (colnr_T)STRLEN(ptr))
{
int c = (*mb_ptr2char)(ptr + pos->col);
if (c != TAB && vim_isprintc(c))
{
endadd = (colnr_T)(char2cells(c) - 1);
if (coladd > endadd) // past end of line
endadd = 0;
else
coladd = 0;
}
}
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);
}
/*
* Get the leftmost and rightmost virtual column of pos1 and pos2.
* Used for Visual block mode.
*/
void
getvcols(
win_T *wp,
pos_T *pos1,
pos_T *pos2,
colnr_T *left,
colnr_T *right)
{
colnr_T from1, from2, to1, to2;
if (LT_POSP(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;
}
/*
* skipwhite: skip over ' ' and '\t'.
*/
char_u *
skipwhite(char_u *q)
{
char_u *p = q;
while (VIM_ISWHITE(*p)) // skip to next non-white
++p;
return p;
}
/*
* getwhitecols: return the number of whitespace
* columns (bytes) at the start of a given line
*/
int
getwhitecols_curline()
{
return getwhitecols(ml_get_curline());
}
int
getwhitecols(char_u *p)
{
return skipwhite(p) - p;
}
/*
* skip over digits
*/
char_u *
skipdigits(char_u *q)
{
char_u *p = q;
while (VIM_ISDIGIT(*p)) // skip to next non-digit
++p;
return p;
}
#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL) || defined(PROTO)
/*
* skip over binary digits
*/
char_u *
skipbin(char_u *q)
{
char_u *p = q;
while (vim_isbdigit(*p)) // skip to next non-digit
++p;
return p;
}
/*
* skip over digits and hex characters
*/
char_u *
skiphex(char_u *q)
{
char_u *p = q;
while (vim_isxdigit(*p)) // skip to next non-digit
++p;
return p;
}
#endif
/*
* skip to bin digit (or NUL after the string)
*/
char_u *
skiptobin(char_u *q)
{
char_u *p = q;
while (*p != NUL && !vim_isbdigit(*p)) // skip to next digit
++p;
return p;
}
/*
* skip to digit (or NUL after the string)
*/
char_u *
skiptodigit(char_u *q)
{
char_u *p = q;
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(char_u *q)
{
char_u *p = q;
while (*p != NUL && !vim_isxdigit(*p)) // skip to next digit
++p;
return p;
}
/*
* 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(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(int c)
{
return (c >= '0' && c <= '9')
|| (c >= 'a' && c <= 'f')
|| (c >= 'A' && c <= 'F');
}
/*
* Corollary of vim_isdigit and vim_isxdigit() that can handle
* characters > 0x100.
*/
int
vim_isbdigit(int c)
{
return (c == '0' || c == '1');
}
/*
* 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(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(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(int c)
{
if (c <= '@')
return c;
if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII))
{
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];
}
if (c < 0x80 && (cmp_flags & CMP_KEEPASCII))
return TOUPPER_ASC(c);
return TOUPPER_LOC(c);
}
int
vim_tolower(int c)
{
if (c <= '@')
return c;
if (c >= 0x80 || !(cmp_flags & CMP_KEEPASCII))
{
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];
}
if (c < 0x80 && (cmp_flags & CMP_KEEPASCII))
return TOLOWER_ASC(c);
return TOLOWER_LOC(c);
}
/*
* skiptowhite: skip over text until ' ' or '\t' or NUL.
*/
char_u *
skiptowhite(char_u *p)
{
while (*p != ' ' && *p != '\t' && *p != NUL)
++p;
return p;
}
/*
* skiptowhite_esc: Like skiptowhite(), but also skip escaped chars
*/
char_u *
skiptowhite_esc(char_u *p)
{
while (*p != ' ' && *p != '\t' && *p != NUL)
{
if ((*p == '\\' || *p == Ctrl_V) && *(p + 1) != NUL)
++p;
++p;
}
return p;
}
/*
* Getdigits: Get a number from a string and skip over it.
* Note: the argument is a pointer to a char_u pointer!
*/
long
getdigits(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(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, octal, and binary numbers. Accepts a '-' sign.
* If "prep" is not NULL, returns a flag to indicate the type of the number:
* 0 decimal
* '0' octal
* 'B' bin
* 'b' bin
* '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 "what" contains STR2NR_BIN recognize binary numbers
* If "what" contains STR2NR_OCT recognize octal numbers
* If "what" contains STR2NR_HEX recognize hex numbers
* If "what" contains STR2NR_FORCE always assume bin/oct/hex.
* If "what" contains STR2NR_QUOTE ignore embedded single quotes
* If maxlen > 0, check at a maximum maxlen chars.
* If strict is TRUE, check the number strictly. return *len = 0 if fail.
*/
void
vim_str2nr(
char_u *start,
int *prep, // return: type of number 0 = decimal, 'x'
// or 'X' is hex, '0' = octal, 'b' or 'B'
// is bin
int *len, // return: detected length of number
int what, // what numbers to recognize
varnumber_T *nptr, // return: signed result
uvarnumber_T *unptr, // return: unsigned result
int maxlen, // max length of string to check
int strict) // check strictly
{
char_u *ptr = start;
int pre = 0; // default is decimal
int negative = FALSE;
uvarnumber_T un = 0;
int n;
if (len != NULL)
*len = 0;
if (ptr[0] == '-')
{
negative = TRUE;
++ptr;
}
// Recognize hex, octal, and bin.
if (ptr[0] == '0' && ptr[1] != '8' && ptr[1] != '9'
&& (maxlen == 0 || maxlen > 1))
{
pre = ptr[1];
if ((what & STR2NR_HEX)
&& (pre == 'X' || pre == 'x') && vim_isxdigit(ptr[2])
&& (maxlen == 0 || maxlen > 2))
// hexadecimal
ptr += 2;
else if ((what & STR2NR_BIN)
&& (pre == 'B' || pre == 'b') && vim_isbdigit(ptr[2])
&& (maxlen == 0 || maxlen > 2))
// binary
ptr += 2;
else
{
// decimal or octal, default is decimal
pre = 0;
if (what & STR2NR_OCT)
{
// Don't interpret "0", "08" or "0129" as octal.
for (n = 1; n != maxlen && VIM_ISDIGIT(ptr[n]); ++n)
{
if (ptr[n] > '7')
{
pre = 0; // can't be octal
break;
}
pre = '0'; // assume octal
}
}
}
}
// Do the conversion manually to avoid sscanf() quirks.
n = 1;
if (pre == 'B' || pre == 'b'
|| ((what & STR2NR_BIN) && (what & STR2NR_FORCE)))
{
// bin
if (pre != 0)
n += 2; // skip over "0b"
while ('0' <= *ptr && *ptr <= '1')
{
// avoid ubsan error for overflow
if (un <= UVARNUM_MAX / 2)
un = 2 * un + (uvarnumber_T)(*ptr - '0');
else
un = UVARNUM_MAX;
++ptr;
if (n++ == maxlen)
break;
if ((what & STR2NR_QUOTE) && *ptr == '\''
&& '0' <= ptr[1] && ptr[1] <= '1')
{
++ptr;
if (n++ == maxlen)
break;
}
}
}
else if (pre == '0' || ((what & STR2NR_OCT) && (what & STR2NR_FORCE)))
{
// octal
while ('0' <= *ptr && *ptr <= '7')
{
// avoid ubsan error for overflow
if (un <= UVARNUM_MAX / 8)
un = 8 * un + (uvarnumber_T)(*ptr - '0');
else
un = UVARNUM_MAX;
++ptr;
if (n++ == maxlen)
break;
if ((what & STR2NR_QUOTE) && *ptr == '\''
&& '0' <= ptr[1] && ptr[1] <= '7')
{
++ptr;
if (n++ == maxlen)
break;
}
}
}
else if (pre != 0 || ((what & STR2NR_HEX) && (what & STR2NR_FORCE)))
{
// hex
if (pre != 0)
n += 2; // skip over "0x"
while (vim_isxdigit(*ptr))
{
// avoid ubsan error for overflow
if (un <= UVARNUM_MAX / 16)
un = 16 * un + (uvarnumber_T)hex2nr(*ptr);
else
un = UVARNUM_MAX;
++ptr;
if (n++ == maxlen)
break;
if ((what & STR2NR_QUOTE) && *ptr == '\'' && vim_isxdigit(ptr[1]))
{
++ptr;
if (n++ == maxlen)
break;
}
}
}
else
{
// decimal
while (VIM_ISDIGIT(*ptr))
{
uvarnumber_T digit = (uvarnumber_T)(*ptr - '0');
// avoid ubsan error for overflow
if (un < UVARNUM_MAX / 10
|| (un == UVARNUM_MAX / 10 && digit <= UVARNUM_MAX % 10))
un = 10 * un + digit;
else
un = UVARNUM_MAX;
++ptr;
if (n++ == maxlen)
break;
if ((what & STR2NR_QUOTE) && *ptr == '\'' && VIM_ISDIGIT(ptr[1]))
{
++ptr;
if (n++ == maxlen)
break;
}
}
}
// Check for an alphanumeric character immediately following, that is
// most likely a typo.
if (strict && n - 1 != maxlen && ASCII_ISALNUM(*ptr))
return;
if (prep != NULL)
*prep = pre;
if (len != NULL)
*len = (int)(ptr - start);
if (nptr != NULL)
{
if (negative) // account for leading '-' for decimal numbers
{
// avoid ubsan error for overflow
if (un > VARNUM_MAX)
*nptr = VARNUM_MIN;
else
*nptr = -(varnumber_T)un;
}
else
{
if (un > VARNUM_MAX)
un = VARNUM_MAX;
*nptr = (varnumber_T)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(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(PROTO)
/*
* Convert two hex characters to a byte.
* Return -1 if one of the characters is not hex.
*/
int
hexhex2nr(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, MSWIN 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(char_u *str)
{
#ifdef BACKSLASH_IN_FILENAME
return (str[0] == '\\'
&& str[1] < 0x80
&& (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(char_u *p)
{
for ( ; *p; ++p)
if (rem_backslash(p))
STRMOVE(p, p + 1);
}
/*
* backslash_halve() plus save the result in allocated memory.
* However, returns "p" when out of memory.
*/
char_u *
backslash_halve_save(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(char_u *buffer, int len)
{
int i;
for (i = 0; i < len; i++)
buffer[i] = ebcdic2ascii_tab[buffer[i]];
}
#endif
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