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vim/src/misc1.c
Christian Brabandt c9a1e257f1
patch 9.1.1003: [security]: heap-buffer-overflow with visual mode 
Problem:  [security]: heap-buffer-overflow with visual mode when
          using :all, causing Vim trying to access beyond end-of-line
          (gandalf)
Solution: Reset visual mode on :all, validate position in gchar_pos()
          and charwise_block_prep()

This fixes CVE-2025-22134

Github Advisory:
https://github.com/vim/vim/security/advisories/GHSA-5rgf-26wj-48v8

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2025-01-11 15:25:00 +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.
*/
/*
* misc1.c: functions that didn't seem to fit elsewhere
*/
#include "vim.h"
#include "version.h"
#if defined(__HAIKU__)
# include <storage/FindDirectory.h>
#endif
#if defined(MSWIN)
# include <lm.h>
#endif
#define URL_SLASH 1 // path_is_url() has found "://"
#define URL_BACKSLASH 2 // path_is_url() has found ":\\"
// All user names (for ~user completion as done by shell).
static garray_T ga_users;
/*
* get_leader_len() returns the length in bytes of the prefix of the given
* string which introduces a comment. If this string is not a comment then
* 0 is returned.
* When "flags" is not NULL, it is set to point to the flags of the recognized
* comment leader.
* "backward" must be true for the "O" command.
* If "include_space" is set, include trailing whitespace while calculating the
* length.
*/
int
get_leader_len(
char_u *line,
char_u **flags,
int backward,
int include_space)
{
int i, j;
int result;
int got_com = FALSE;
int found_one;
char_u part_buf[COM_MAX_LEN]; // buffer for one option part
char_u *string; // pointer to comment string
char_u *list;
int middle_match_len = 0;
char_u *prev_list;
char_u *saved_flags = NULL;
result = i = 0;
while (VIM_ISWHITE(line[i])) // leading white space is ignored
++i;
/*
* Repeat to match several nested comment strings.
*/
while (line[i] != NUL)
{
/*
* scan through the 'comments' option for a match
*/
found_one = FALSE;
for (list = curbuf->b_p_com; *list; )
{
// Get one option part into part_buf[]. Advance "list" to next
// one. Put "string" at start of string.
if (!got_com && flags != NULL)
*flags = list; // remember where flags started
prev_list = list;
(void)copy_option_part(&list, part_buf, COM_MAX_LEN, ",");
string = vim_strchr(part_buf, ':');
if (string == NULL) // missing ':', ignore this part
continue;
*string++ = NUL; // isolate flags from string
// If we found a middle match previously, use that match when this
// is not a middle or end.
if (middle_match_len != 0
&& vim_strchr(part_buf, COM_MIDDLE) == NULL
&& vim_strchr(part_buf, COM_END) == NULL)
break;
// When we already found a nested comment, only accept further
// nested comments.
if (got_com && vim_strchr(part_buf, COM_NEST) == NULL)
continue;
// When 'O' flag present and using "O" command skip this one.
if (backward && vim_strchr(part_buf, COM_NOBACK) != NULL)
continue;
// Line contents and string must match.
// When string starts with white space, must have some white space
// (but the amount does not need to match, there might be a mix of
// TABs and spaces).
if (VIM_ISWHITE(string[0]))
{
if (i == 0 || !VIM_ISWHITE(line[i - 1]))
continue; // missing white space
while (VIM_ISWHITE(string[0]))
++string;
}
for (j = 0; string[j] != NUL && string[j] == line[i + j]; ++j)
;
if (string[j] != NUL)
continue; // string doesn't match
// When 'b' flag used, there must be white space or an
// end-of-line after the string in the line.
if (vim_strchr(part_buf, COM_BLANK) != NULL
&& !VIM_ISWHITE(line[i + j]) && line[i + j] != NUL)
continue;
// We have found a match, stop searching unless this is a middle
// comment. The middle comment can be a substring of the end
// comment in which case it's better to return the length of the
// end comment and its flags. Thus we keep searching with middle
// and end matches and use an end match if it matches better.
if (vim_strchr(part_buf, COM_MIDDLE) != NULL)
{
if (middle_match_len == 0)
{
middle_match_len = j;
saved_flags = prev_list;
}
continue;
}
if (middle_match_len != 0 && j > middle_match_len)
// Use this match instead of the middle match, since it's a
// longer thus better match.
middle_match_len = 0;
if (middle_match_len == 0)
i += j;
found_one = TRUE;
break;
}
if (middle_match_len != 0)
{
// Use the previously found middle match after failing to find a
// match with an end.
if (!got_com && flags != NULL)
*flags = saved_flags;
i += middle_match_len;
found_one = TRUE;
}
// No match found, stop scanning.
if (!found_one)
break;
result = i;
// Include any trailing white space.
while (VIM_ISWHITE(line[i]))
++i;
if (include_space)
result = i;
// If this comment doesn't nest, stop here.
got_com = TRUE;
if (vim_strchr(part_buf, COM_NEST) == NULL)
break;
}
return result;
}
/*
* Return the offset at which the last comment in line starts. If there is no
* comment in the whole line, -1 is returned.
*
* When "flags" is not null, it is set to point to the flags describing the
* recognized comment leader.
*/
int
get_last_leader_offset(char_u *line, char_u **flags)
{
int result = -1;
int i, j;
int lower_check_bound = 0;
char_u *string;
char_u *com_leader;
char_u *com_flags;
char_u *list;
int found_one;
char_u part_buf[COM_MAX_LEN]; // buffer for one option part
/*
* Repeat to match several nested comment strings.
*/
i = (int)STRLEN(line);
while (--i >= lower_check_bound)
{
/*
* scan through the 'comments' option for a match
*/
found_one = FALSE;
for (list = curbuf->b_p_com; *list; )
{
char_u *flags_save = list;
/*
* Get one option part into part_buf[]. Advance list to next one.
* put string at start of string.
*/
(void)copy_option_part(&list, part_buf, COM_MAX_LEN, ",");
string = vim_strchr(part_buf, ':');
if (string == NULL) // If everything is fine, this cannot actually
// happen.
continue;
*string++ = NUL; // Isolate flags from string.
com_leader = string;
/*
* Line contents and string must match.
* When string starts with white space, must have some white space
* (but the amount does not need to match, there might be a mix of
* TABs and spaces).
*/
if (VIM_ISWHITE(string[0]))
{
if (i == 0 || !VIM_ISWHITE(line[i - 1]))
continue;
while (VIM_ISWHITE(*string))
++string;
}
for (j = 0; string[j] != NUL && string[j] == line[i + j]; ++j)
/* do nothing */;
if (string[j] != NUL)
continue;
/*
* When 'b' flag used, there must be white space or an
* end-of-line after the string in the line.
*/
if (vim_strchr(part_buf, COM_BLANK) != NULL
&& !VIM_ISWHITE(line[i + j]) && line[i + j] != NUL)
continue;
if (vim_strchr(part_buf, COM_MIDDLE) != NULL)
{
// For a middlepart comment, only consider it to match if
// everything before the current position in the line is
// whitespace. Otherwise we would think we are inside a
// comment if the middle part appears somewhere in the middle
// of the line. E.g. for C the "*" appears often.
for (j = 0; VIM_ISWHITE(line[j]) && j <= i; j++)
;
if (j < i)
continue;
}
/*
* We have found a match, stop searching.
*/
found_one = TRUE;
if (flags)
*flags = flags_save;
com_flags = flags_save;
break;
}
if (found_one)
{
char_u part_buf2[COM_MAX_LEN]; // buffer for one option part
int len1, len2, off;
result = i;
/*
* If this comment nests, continue searching.
*/
if (vim_strchr(part_buf, COM_NEST) != NULL)
continue;
lower_check_bound = i;
// Let's verify whether the comment leader found is a substring
// of other comment leaders. If it is, let's adjust the
// lower_check_bound so that we make sure that we have determined
// the comment leader correctly.
while (VIM_ISWHITE(*com_leader))
++com_leader;
len1 = (int)STRLEN(com_leader);
for (list = curbuf->b_p_com; *list; )
{
char_u *flags_save = list;
(void)copy_option_part(&list, part_buf2, COM_MAX_LEN, ",");
if (flags_save == com_flags)
continue;
string = vim_strchr(part_buf2, ':');
++string;
while (VIM_ISWHITE(*string))
++string;
len2 = (int)STRLEN(string);
if (len2 == 0)
continue;
// Now we have to verify whether string ends with a substring
// beginning the com_leader.
for (off = (len2 > i ? i : len2); off > 0 && off + len1 > len2;)
{
--off;
if (!STRNCMP(string + off, com_leader, len2 - off))
{
if (i - off < lower_check_bound)
lower_check_bound = i - off;
}
}
}
}
}
return result;
}
/*
* Return the number of window lines occupied by buffer line "lnum".
* Includes any filler lines.
*/
int
plines(linenr_T lnum)
{
return plines_win(curwin, lnum, TRUE);
}
int
plines_win(
win_T *wp,
linenr_T lnum,
int limit_winheight) // when TRUE limit to window height
{
#if defined(FEAT_DIFF) || defined(PROTO)
// Check for filler lines above this buffer line. When folded the result
// is one line anyway.
return plines_win_nofill(wp, lnum, limit_winheight)
+ diff_check_fill(wp, lnum);
}
/*
* Return the number of window lines occupied by buffer line "lnum".
* Does not include filler lines.
*/
int
plines_nofill(linenr_T lnum)
{
return plines_win_nofill(curwin, lnum, TRUE);
}
int
plines_win_nofill(
win_T *wp,
linenr_T lnum,
int limit_winheight) // when TRUE limit to window height
{
#endif
int lines;
if (wp->w_width == 0)
return 1;
#ifdef FEAT_FOLDING
// Folded lines are handled just like an empty line.
// NOTE: Caller must handle lines that are MAYBE folded.
if (lineFolded(wp, lnum) == TRUE)
return 1;
#endif
if (!wp->w_p_wrap)
lines = 1
#ifdef FEAT_PROP_POPUP
// add a line for each "above" and "below" aligned text property
+ prop_count_above_below(wp->w_buffer, lnum)
#endif
;
else
lines = plines_win_nofold(wp, lnum);
if (limit_winheight && lines > wp->w_height)
return wp->w_height;
return lines;
}
/*
* Return number of window lines physical line "lnum" will occupy in window
* "wp". Does not care about folding, 'wrap' or 'diff'.
*/
int
plines_win_nofold(win_T *wp, linenr_T lnum)
{
char_u *s;
long col;
int width;
chartabsize_T cts;
s = ml_get_buf(wp->w_buffer, lnum, FALSE);
init_chartabsize_arg(&cts, wp, lnum, 0, s, s);
if (*s == NUL
#ifdef FEAT_PROP_POPUP
&& !cts.cts_has_prop_with_text
#endif
)
return 1; // be quick for an empty line
win_linetabsize_cts(&cts, (colnr_T)MAXCOL);
clear_chartabsize_arg(&cts);
col = (int)cts.cts_vcol;
// If list mode is on, then the '$' at the end of the line may take up one
// extra column.
if (wp->w_p_list && wp->w_lcs_chars.eol != NUL)
col += 1;
/*
* Add column offset for 'number', 'relativenumber' and 'foldcolumn'.
*/
width = wp->w_width - win_col_off(wp);
if (width <= 0)
return 32000;
if (col <= width)
return 1;
col -= width;
width += win_col_off2(wp);
return (col + (width - 1)) / width + 1;
}
/*
* Like plines_win(), but only reports the number of physical screen lines
* used from the start of the line to the given column number.
*/
int
plines_win_col(win_T *wp, linenr_T lnum, long column)
{
long col;
int lines = 0;
int width;
char_u *line;
chartabsize_T cts;
#ifdef FEAT_DIFF
// Check for filler lines above this buffer line. When folded the result
// is one line anyway.
lines = diff_check_fill(wp, lnum);
#endif
if (!wp->w_p_wrap)
return lines + 1;
if (wp->w_width == 0)
return lines + 1;
line = ml_get_buf(wp->w_buffer, lnum, FALSE);
init_chartabsize_arg(&cts, wp, lnum, 0, line, line);
while (*cts.cts_ptr != NUL && --column >= 0)
{
cts.cts_vcol += win_lbr_chartabsize(&cts, NULL);
MB_PTR_ADV(cts.cts_ptr);
}
/*
* If *cts.cts_ptr is a TAB, and the TAB is not displayed as ^I, and we're
* not in MODE_INSERT state, then col must be adjusted so that it
* represents the last screen position of the TAB. This only fixes an
* error when the TAB wraps from one screen line to the next (when
* 'columns' is not a multiple of 'ts') -- webb.
*/
col = cts.cts_vcol;
if (*cts.cts_ptr == TAB && (State & MODE_NORMAL)
&& (!wp->w_p_list || wp->w_lcs_chars.tab1))
col += win_lbr_chartabsize(&cts, NULL) - 1;
clear_chartabsize_arg(&cts);
/*
* Add column offset for 'number', 'relativenumber', 'foldcolumn', etc.
*/
width = wp->w_width - win_col_off(wp);
if (width <= 0)
return 9999;
lines += 1;
if (col > width)
lines += (col - width) / (width + win_col_off2(wp)) + 1;
return lines;
}
/*
* Return number of window lines the physical line range from "first" until
* "last" will occupy in window "wp". Takes into account folding, 'wrap',
* topfill and filler lines beyond the end of the buffer. Limit to "max" lines.
*/
int
plines_m_win(win_T *wp, linenr_T first, linenr_T last, int max)
{
int count = 0;
while (first <= last && count < max)
{
#ifdef FEAT_FOLDING
int x;
// Check if there are any really folded lines, but also included lines
// that are maybe folded.
x = foldedCount(wp, first, NULL);
if (x > 0)
{
++count; // count 1 for "+-- folded" line
first += x;
}
else
#endif
{
#ifdef FEAT_DIFF
if (first == wp->w_topline)
count += plines_win_nofill(wp, first, FALSE) + wp->w_topfill;
else
#endif
count += plines_win(wp, first, FALSE);
++first;
}
}
#ifdef FEAT_DIFF
if (first == wp->w_buffer->b_ml.ml_line_count + 1)
count += diff_check_fill(wp, first);
#endif
return MIN(max, count);
}
int
gchar_pos(pos_T *pos)
{
char_u *ptr;
int ptrlen;
// When searching columns is sometimes put at the end of a line.
if (pos->col == MAXCOL)
return NUL;
ptrlen = ml_get_len(pos->lnum);
ptr = ml_get_pos(pos);
if (pos->col > ptrlen)
return NUL;
if (has_mbyte)
return (*mb_ptr2char)(ptr);
return (int)*ptr;
}
int
gchar_cursor(void)
{
if (has_mbyte)
return (*mb_ptr2char)(ml_get_cursor());
return (int)*ml_get_cursor();
}
/*
* Write a character at the current cursor position.
* It is directly written into the block.
*/
void
pchar_cursor(int c)
{
*(ml_get_buf(curbuf, curwin->w_cursor.lnum, TRUE)
+ curwin->w_cursor.col) = c;
}
/*
* Skip to next part of an option argument: Skip space and comma.
*/
char_u *
skip_to_option_part(char_u *p)
{
if (*p == ',')
++p;
while (*p == ' ')
++p;
return p;
}
/*
* check_status: called when the status bars for the buffer 'buf'
* need to be updated
*/
void
check_status(buf_T *buf)
{
win_T *wp;
FOR_ALL_WINDOWS(wp)
if (wp->w_buffer == buf && wp->w_status_height)
{
wp->w_redr_status = TRUE;
set_must_redraw(UPD_VALID);
}
}
/*
* Ask for a reply from the user, a 'y' or a 'n', with prompt "str" (which
* should have been translated already).
* No other characters are accepted, the message is repeated until a valid
* reply is entered or CTRL-C is hit.
* If direct is TRUE, don't use vgetc() but ui_inchar(), don't get characters
* from any buffers but directly from the user.
*
* return the 'y' or 'n'
*/
int
ask_yesno(char_u *str, int direct)
{
int r = ' ';
int save_State = State;
if (exiting) // put terminal in raw mode for this question
settmode(TMODE_RAW);
++no_wait_return;
#ifdef USE_ON_FLY_SCROLL
dont_scroll = TRUE; // disallow scrolling here
#endif
State = MODE_CONFIRM; // mouse behaves like with :confirm
setmouse(); // disables mouse for xterm
++no_mapping;
++allow_keys; // no mapping here, but recognize keys
while (r != 'y' && r != 'n')
{
// same highlighting as for wait_return()
smsg_attr(HL_ATTR(HLF_R), "%s (y/n)?", str);
if (direct)
r = get_keystroke();
else
r = plain_vgetc();
if (r == Ctrl_C || r == ESC)
r = 'n';
msg_putchar(r); // show what you typed
out_flush();
}
--no_wait_return;
State = save_State;
setmouse();
--no_mapping;
--allow_keys;
return r;
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Returns the current mode as a string in "buf[MODE_MAX_LENGTH]", NUL
* terminated.
* The first character represents the major mode, the following ones the minor
* ones.
*/
void
get_mode(char_u *buf)
{
int i = 0;
if (time_for_testing == 93784)
{
// Testing the two-character code.
buf[i++] = 'x';
buf[i++] = '!';
}
#ifdef FEAT_TERMINAL
else if (term_use_loop())
{
if (State & MODE_CMDLINE)
buf[i++] = 'c';
buf[i++] = 't';
}
#endif
else if (State == MODE_HITRETURN || State == MODE_ASKMORE
|| State == MODE_SETWSIZE
|| State == MODE_CONFIRM)
{
buf[i++] = 'r';
if (State == MODE_ASKMORE)
buf[i++] = 'm';
else if (State == MODE_CONFIRM)
buf[i++] = '?';
}
else if (State == MODE_EXTERNCMD)
buf[i++] = '!';
else if (State & MODE_INSERT)
{
if (State & VREPLACE_FLAG)
{
buf[i++] = 'R';
buf[i++] = 'v';
}
else
{
if (State & REPLACE_FLAG)
buf[i++] = 'R';
else
buf[i++] = 'i';
}
if (ins_compl_active())
buf[i++] = 'c';
else if (ctrl_x_mode_not_defined_yet())
buf[i++] = 'x';
}
else if ((State & MODE_CMDLINE) || exmode_active)
{
buf[i++] = 'c';
if (exmode_active == EXMODE_VIM)
buf[i++] = 'v';
else if (exmode_active == EXMODE_NORMAL)
buf[i++] = 'e';
if ((State & MODE_CMDLINE) && cmdline_overstrike())
buf[i++] = 'r';
}
else if (VIsual_active)
{
if (VIsual_select)
buf[i++] = VIsual_mode + 's' - 'v';
else
{
buf[i++] = VIsual_mode;
if (restart_VIsual_select)
buf[i++] = 's';
}
}
else
{
buf[i++] = 'n';
if (finish_op)
{
buf[i++] = 'o';
// to be able to detect force-linewise/blockwise/characterwise
// operations
buf[i++] = motion_force;
}
else if (restart_edit == 'I' || restart_edit == 'R'
|| restart_edit == 'V')
{
buf[i++] = 'i';
buf[i++] = restart_edit;
}
#ifdef FEAT_TERMINAL
else if (term_in_normal_mode())
buf[i++] = 't';
#endif
}
buf[i] = NUL;
}
/*
* "mode()" function
*/
void
f_mode(typval_T *argvars, typval_T *rettv)
{
char_u buf[MODE_MAX_LENGTH];
if (in_vim9script() && check_for_opt_bool_arg(argvars, 0) == FAIL)
return;
get_mode(buf);
// Clear out the minor mode when the argument is not a non-zero number or
// non-empty string.
if (!non_zero_arg(&argvars[0]))
buf[1] = NUL;
rettv->vval.v_string = vim_strsave(buf);
rettv->v_type = VAR_STRING;
}
static void
may_add_state_char(garray_T *gap, char_u *include, int c)
{
if (include == NULL || vim_strchr(include, c) != NULL)
ga_append(gap, c);
}
/*
* "state()" function
*/
void
f_state(typval_T *argvars, typval_T *rettv)
{
garray_T ga;
char_u *include = NULL;
int i;
if (in_vim9script() && check_for_opt_string_arg(argvars, 0) == FAIL)
return;
ga_init2(&ga, 1, 20);
if (argvars[0].v_type != VAR_UNKNOWN)
include = tv_get_string(&argvars[0]);
if (!(stuff_empty() && typebuf.tb_len == 0 && scriptin[curscript] == NULL))
may_add_state_char(&ga, include, 'm');
if (op_pending())
may_add_state_char(&ga, include, 'o');
if (autocmd_busy)
may_add_state_char(&ga, include, 'x');
if (ins_compl_active())
may_add_state_char(&ga, include, 'a');
# ifdef FEAT_JOB_CHANNEL
if (channel_in_blocking_wait())
may_add_state_char(&ga, include, 'w');
# endif
if (!get_was_safe_state())
may_add_state_char(&ga, include, 'S');
for (i = 0; i < get_callback_depth() && i < 3; ++i)
may_add_state_char(&ga, include, 'c');
if (msg_scrolled > 0)
may_add_state_char(&ga, include, 's');
rettv->v_type = VAR_STRING;
rettv->vval.v_string = ga.ga_data;
}
#endif // FEAT_EVAL
/*
* Get a key stroke directly from the user.
* Ignores mouse clicks and scrollbar events, except a click for the left
* button (used at the more prompt).
* Doesn't use vgetc(), because it syncs undo and eats mapped characters.
* Disadvantage: typeahead is ignored.
* Translates the interrupt character for unix to ESC.
*/
int
get_keystroke(void)
{
char_u *buf = NULL;
int buflen = 150;
int maxlen;
int len = 0;
int n;
int save_mapped_ctrl_c = mapped_ctrl_c;
int waited = 0;
mapped_ctrl_c = FALSE; // mappings are not used here
for (;;)
{
cursor_on();
out_flush();
// Leave some room for check_termcode() to insert a key code into (max
// 5 chars plus NUL). And fix_input_buffer() can triple the number of
// bytes.
maxlen = (buflen - 6 - len) / 3;
if (buf == NULL)
buf = alloc(buflen);
else if (maxlen < 10)
{
char_u *t_buf = buf;
// Need some more space. This might happen when receiving a long
// escape sequence.
buflen += 100;
buf = vim_realloc(buf, buflen);
if (buf == NULL)
vim_free(t_buf);
maxlen = (buflen - 6 - len) / 3;
}
if (buf == NULL)
{
do_outofmem_msg((long_u)buflen);
return ESC; // panic!
}
// First time: blocking wait. Second time: wait up to 100ms for a
// terminal code to complete.
n = ui_inchar(buf + len, maxlen, len == 0 ? -1L : 100L, 0);
if (n > 0)
{
// Replace zero and CSI by a special key code.
n = fix_input_buffer(buf + len, n);
len += n;
waited = 0;
}
else if (len > 0)
++waited; // keep track of the waiting time
// Incomplete termcode and not timed out yet: get more characters
if ((n = check_termcode(1, buf, buflen, &len)) < 0
&& (!p_ttimeout || waited * 100L < (p_ttm < 0 ? p_tm : p_ttm)))
continue;
if (n == KEYLEN_REMOVED) // key code removed
{
if (must_redraw != 0 && !need_wait_return && (State
& (MODE_CMDLINE | MODE_HITRETURN | MODE_ASKMORE)) == 0)
{
// Redrawing was postponed, do it now.
update_screen(0);
setcursor(); // put cursor back where it belongs
}
continue;
}
if (n > 0) // found a termcode: adjust length
len = n;
if (len == 0) // nothing typed yet
continue;
// Handle modifier and/or special key code.
n = buf[0];
if (n == K_SPECIAL)
{
n = TO_SPECIAL(buf[1], buf[2]);
if (buf[1] == KS_MODIFIER
|| n == K_IGNORE
|| (is_mouse_key(n) && n != K_LEFTMOUSE)
#ifdef FEAT_GUI
|| n == K_VER_SCROLLBAR
|| n == K_HOR_SCROLLBAR
#endif
)
{
if (buf[1] == KS_MODIFIER)
mod_mask = buf[2];
len -= 3;
if (len > 0)
mch_memmove(buf, buf + 3, (size_t)len);
continue;
}
break;
}
if (has_mbyte)
{
if (MB_BYTE2LEN(n) > len)
continue; // more bytes to get
buf[len >= buflen ? buflen - 1 : len] = NUL;
n = (*mb_ptr2char)(buf);
}
#ifdef UNIX
if (n == intr_char)
n = ESC;
#endif
break;
}
vim_free(buf);
mapped_ctrl_c = save_mapped_ctrl_c;
return n;
}
// For overflow detection, add a digit safely to an int value.
static int
vim_append_digit_int(int *value, int digit)
{
int x = *value;
if (x > ((INT_MAX - digit) / 10))
return FAIL;
*value = x * 10 + digit;
return OK;
}
/*
* Get a number from the user.
* When "mouse_used" is not NULL allow using the mouse.
*/
int
get_number(
int colon, // allow colon to abort
int *mouse_used)
{
int n = 0;
int c;
int typed = 0;
if (mouse_used != NULL)
*mouse_used = FALSE;
// When not printing messages, the user won't know what to type, return a
// zero (as if CR was hit).
if (msg_silent != 0)
return 0;
#ifdef USE_ON_FLY_SCROLL
dont_scroll = TRUE; // disallow scrolling here
#endif
++no_mapping;
++allow_keys; // no mapping here, but recognize keys
for (;;)
{
windgoto(msg_row, msg_col);
c = safe_vgetc();
if (VIM_ISDIGIT(c))
{
if (vim_append_digit_int(&n, c - '0') == FAIL)
return 0;
msg_putchar(c);
++typed;
}
else if (c == K_DEL || c == K_KDEL || c == K_BS || c == Ctrl_H)
{
if (typed > 0)
{
msg_puts("\b \b");
--typed;
}
n /= 10;
}
else if (mouse_used != NULL && c == K_LEFTMOUSE)
{
*mouse_used = TRUE;
n = mouse_row + 1;
break;
}
else if (n == 0 && c == ':' && colon)
{
stuffcharReadbuff(':');
if (!exmode_active)
cmdline_row = msg_row;
skip_redraw = TRUE; // skip redraw once
do_redraw = FALSE;
break;
}
else if (c == Ctrl_C || c == ESC || c == 'q')
{
n = 0;
break;
}
else if (c == CAR || c == NL )
break;
}
--no_mapping;
--allow_keys;
return n;
}
/*
* Ask the user to enter a number.
* When "mouse_used" is not NULL allow using the mouse and in that case return
* the line number.
*/
int
prompt_for_number(int *mouse_used)
{
int i;
int save_cmdline_row;
int save_State;
// When using ":silent" assume that <CR> was entered.
if (mouse_used != NULL)
msg_puts(_("Type number and <Enter> or click with the mouse (q or empty cancels): "));
else
msg_puts(_("Type number and <Enter> (q or empty cancels): "));
// Set the state such that text can be selected/copied/pasted and we still
// get mouse events. redraw_after_callback() will not redraw if cmdline_row
// is zero.
save_cmdline_row = cmdline_row;
cmdline_row = 0;
save_State = State;
State = MODE_CMDLINE;
// May show different mouse shape.
setmouse();
i = get_number(TRUE, mouse_used);
if (KeyTyped)
{
// don't call wait_return() now
if (msg_row > 0)
cmdline_row = msg_row - 1;
need_wait_return = FALSE;
msg_didany = FALSE;
msg_didout = FALSE;
}
else
cmdline_row = save_cmdline_row;
State = save_State;
// May need to restore mouse shape.
setmouse();
return i;
}
void
msgmore(long n)
{
long pn;
if (global_busy // no messages now, wait until global is finished
|| !messaging()) // 'lazyredraw' set, don't do messages now
return;
// We don't want to overwrite another important message, but do overwrite
// a previous "more lines" or "fewer lines" message, so that "5dd" and
// then "put" reports the last action.
if (keep_msg != NULL && !keep_msg_more)
return;
if (n > 0)
pn = n;
else
pn = -n;
if (pn > p_report)
{
if (n > 0)
vim_snprintf(msg_buf, MSG_BUF_LEN,
NGETTEXT("%ld more line", "%ld more lines", pn), pn);
else
vim_snprintf(msg_buf, MSG_BUF_LEN,
NGETTEXT("%ld line less", "%ld fewer lines", pn), pn);
if (got_int)
vim_strcat((char_u *)msg_buf, (char_u *)_(" (Interrupted)"),
MSG_BUF_LEN);
if (msg(msg_buf))
{
set_keep_msg((char_u *)msg_buf, 0);
keep_msg_more = TRUE;
}
}
}
/*
* flush map and typeahead buffers and give a warning for an error
*/
void
beep_flush(void)
{
if (emsg_silent == 0)
{
flush_buffers(FLUSH_MINIMAL);
vim_beep(BO_ERROR);
}
}
/*
* Give a warning for an error. "val" is one of the BO_ values, e.g., BO_OPER.
*/
void
vim_beep(unsigned val)
{
#ifdef FEAT_EVAL
called_vim_beep = TRUE;
#endif
if (emsg_silent != 0 || in_assert_fails)
return;
if (!((bo_flags & val) || (bo_flags & BO_ALL)))
{
#ifdef ELAPSED_FUNC
static int did_init = FALSE;
static elapsed_T start_tv;
// Only beep once per half a second, otherwise a sequence of beeps
// would freeze Vim.
if (!did_init || ELAPSED_FUNC(start_tv) > 500)
{
did_init = TRUE;
ELAPSED_INIT(start_tv);
#endif
if (p_vb
#ifdef FEAT_GUI
// While the GUI is starting up the termcap is set for
// the GUI but the output still goes to a terminal.
&& !(gui.in_use && gui.starting)
#endif
)
{
out_str_cf(T_VB);
#ifdef FEAT_VTP
// No restore color information, refresh the screen.
if (has_vtp_working() != 0
# ifdef FEAT_TERMGUICOLORS
&& (p_tgc || (!p_tgc && t_colors >= 256))
# endif
)
{
redraw_later(UPD_CLEAR);
update_screen(0);
redrawcmd();
}
#endif
}
else
out_char(BELL);
#ifdef ELAPSED_FUNC
}
#endif
}
// When 'debug' contains "beep" produce a message. If we are sourcing
// a script or executing a function give the user a hint where the beep
// comes from.
if (vim_strchr(p_debug, 'e') != NULL)
{
msg_source(HL_ATTR(HLF_W));
msg_attr(_("Beep!"), HL_ATTR(HLF_W));
}
}
/*
* To get the "real" home directory:
* - get value of $HOME
* For Unix:
* - go to that directory
* - do mch_dirname() to get the real name of that directory.
* This also works with mounts and links.
* Don't do this for MS-DOS, it will change the "current dir" for a drive.
* For Windows:
* This code is duplicated in init_homedir() in dosinst.c. Keep in sync!
*/
void
init_homedir(void)
{
char_u *var;
// In case we are called a second time (when 'encoding' changes).
VIM_CLEAR(homedir);
#ifdef VMS
var = mch_getenv((char_u *)"SYS$LOGIN");
#else
var = mch_getenv((char_u *)"HOME");
#endif
#ifdef MSWIN
/*
* Typically, $HOME is not defined on Windows, unless the user has
* specifically defined it for Vim's sake. However, on Windows NT
* platforms, $HOMEDRIVE and $HOMEPATH are automatically defined for
* each user. Try constructing $HOME from these.
*/
if (var == NULL || *var == NUL)
{
char_u *homedrive, *homepath;
homedrive = mch_getenv((char_u *)"HOMEDRIVE");
homepath = mch_getenv((char_u *)"HOMEPATH");
if (homepath == NULL || *homepath == NUL)
homepath = (char_u *)"\\";
if (homedrive != NULL
&& STRLEN(homedrive) + STRLEN(homepath) < MAXPATHL)
{
sprintf((char *)NameBuff, "%s%s", homedrive, homepath);
if (NameBuff[0] != NUL)
var = NameBuff;
}
}
if (var == NULL)
var = mch_getenv((char_u *)"USERPROFILE");
/*
* Weird but true: $HOME may contain an indirect reference to another
* variable, esp. "%USERPROFILE%". Happens when $USERPROFILE isn't set
* when $HOME is being set.
*/
if (var != NULL && *var == '%')
{
char_u *p;
char_u *exp;
p = vim_strchr(var + 1, '%');
if (p != NULL)
{
vim_strncpy(NameBuff, var + 1, p - (var + 1));
exp = mch_getenv(NameBuff);
if (exp != NULL && *exp != NUL
&& STRLEN(exp) + STRLEN(p) < MAXPATHL)
{
vim_snprintf((char *)NameBuff, MAXPATHL, "%s%s", exp, p + 1);
var = NameBuff;
}
}
}
if (var != NULL && *var == NUL) // empty is same as not set
var = NULL;
if (enc_utf8 && var != NULL)
{
int len;
char_u *pp = NULL;
// Convert from active codepage to UTF-8. Other conversions are
// not done, because they would fail for non-ASCII characters.
acp_to_enc(var, (int)STRLEN(var), &pp, &len);
if (pp != NULL)
{
homedir = pp;
return;
}
}
/*
* Default home dir is C:/
* Best assumption we can make in such a situation.
*/
if (var == NULL)
var = (char_u *)"C:/";
#endif
if (var != NULL)
{
#ifdef UNIX
/*
* Change to the directory and get the actual path. This resolves
* links. Don't do it when we can't return.
*/
if (mch_dirname(NameBuff, MAXPATHL) == OK
&& mch_chdir((char *)NameBuff) == 0)
{
if (!mch_chdir((char *)var) && mch_dirname(IObuff, IOSIZE) == OK)
var = IObuff;
if (mch_chdir((char *)NameBuff) != 0)
emsg(_(e_cannot_go_back_to_previous_directory));
}
#endif
homedir = vim_strsave(var);
}
}
#if defined(EXITFREE) || defined(PROTO)
void
free_homedir(void)
{
vim_free(homedir);
}
void
free_users(void)
{
ga_clear_strings(&ga_users);
}
#endif
#if defined(MSWIN) || defined(PROTO)
/*
* Initialize $VIM and $VIMRUNTIME when 'enc' is updated.
*/
void
init_vimdir(void)
{
int mustfree;
char_u *p;
mch_get_exe_name();
mustfree = FALSE;
didset_vim = FALSE;
p = vim_getenv((char_u *)"VIM", &mustfree);
if (mustfree)
vim_free(p);
mustfree = FALSE;
didset_vimruntime = FALSE;
p = vim_getenv((char_u *)"VIMRUNTIME", &mustfree);
if (mustfree)
vim_free(p);
}
#endif
/*
* Call expand_env() and store the result in an allocated string.
* This is not very memory efficient, this expects the result to be freed
* again soon.
*/
char_u *
expand_env_save(char_u *src)
{
return expand_env_save_opt(src, FALSE);
}
/*
* Idem, but when "one" is TRUE handle the string as one file name, only
* expand "~" at the start.
*/
char_u *
expand_env_save_opt(char_u *src, int one)
{
char_u *p;
p = alloc(MAXPATHL);
if (p != NULL)
expand_env_esc(src, p, MAXPATHL, FALSE, one, NULL);
return p;
}
/*
* Expand environment variable with path name.
* "~/" is also expanded, using $HOME. For Unix "~user/" is expanded.
* Skips over "\ ", "\~" and "\$" (not for Win32 though).
* If anything fails no expansion is done and dst equals src.
*/
void
expand_env(
char_u *src, // input string e.g. "$HOME/vim.hlp"
char_u *dst, // where to put the result
int dstlen) // maximum length of the result
{
expand_env_esc(src, dst, dstlen, FALSE, FALSE, NULL);
}
void
expand_env_esc(
char_u *srcp, // input string e.g. "$HOME/vim.hlp"
char_u *dst, // where to put the result
int dstlen, // maximum length of the result
int esc, // escape spaces in expanded variables
int one, // "srcp" is one file name
char_u *startstr) // start again after this (can be NULL)
{
char_u *src;
char_u *tail;
int c;
char_u *var;
int copy_char;
int mustfree; // var was allocated, need to free it later
int at_start = TRUE; // at start of a name
int startstr_len = 0;
if (startstr != NULL)
startstr_len = (int)STRLEN(startstr);
src = skipwhite(srcp);
--dstlen; // leave one char space for "\,"
while (*src && dstlen > 0)
{
#ifdef FEAT_EVAL
// Skip over `=expr`.
if (src[0] == '`' && src[1] == '=')
{
size_t len;
var = src;
src += 2;
(void)skip_expr(&src, NULL);
if (*src == '`')
++src;
len = src - var;
if (len > (size_t)dstlen)
len = dstlen;
vim_strncpy(dst, var, len);
dst += len;
dstlen -= (int)len;
continue;
}
#endif
copy_char = TRUE;
if ((*src == '$'
#ifdef VMS
&& at_start
#endif
)
#if defined(MSWIN)
|| *src == '%'
#endif
|| (*src == '~' && at_start))
{
mustfree = FALSE;
/*
* The variable name is copied into dst temporarily, because it may
* be a string in read-only memory and a NUL needs to be appended.
*/
if (*src != '~') // environment var
{
tail = src + 1;
var = dst;
c = dstlen - 1;
#ifdef UNIX
// Unix has ${var-name} type environment vars
if (*tail == '{' && !vim_isIDc('{'))
{
tail++; // ignore '{'
while (c-- > 0 && *tail && *tail != '}')
*var++ = *tail++;
}
else
#endif
{
while (c-- > 0 && *tail != NUL && ((vim_isIDc(*tail))
#if defined(MSWIN)
|| (*src == '%' && *tail != '%')
#endif
))
*var++ = *tail++;
}
#if defined(MSWIN) || defined(UNIX)
# ifdef UNIX
if (src[1] == '{' && *tail != '}')
# else
if (*src == '%' && *tail != '%')
# endif
var = NULL;
else
{
# ifdef UNIX
if (src[1] == '{')
# else
if (*src == '%')
#endif
++tail;
#endif
*var = NUL;
var = vim_getenv(dst, &mustfree);
#if defined(MSWIN) || defined(UNIX)
}
#endif
}
// home directory
else if ( src[1] == NUL
|| vim_ispathsep(src[1])
|| vim_strchr((char_u *)" ,\t\n", src[1]) != NULL)
{
var = homedir;
tail = src + 1;
}
else // user directory
{
#if defined(UNIX) || (defined(VMS) && defined(USER_HOME))
/*
* Copy ~user to dst[], so we can put a NUL after it.
*/
tail = src;
var = dst;
c = dstlen - 1;
while ( c-- > 0
&& *tail
&& vim_isfilec(*tail)
&& !vim_ispathsep(*tail))
*var++ = *tail++;
*var = NUL;
# ifdef UNIX
/*
* If the system supports getpwnam(), use it.
* Otherwise, or if getpwnam() fails, the shell is used to
* expand ~user. This is slower and may fail if the shell
* does not support ~user (old versions of /bin/sh).
*/
# if defined(HAVE_GETPWNAM) && defined(HAVE_PWD_H)
{
// Note: memory allocated by getpwnam() is never freed.
// Calling endpwent() apparently doesn't help.
struct passwd *pw = (*dst == NUL)
? NULL : getpwnam((char *)dst + 1);
var = (pw == NULL) ? NULL : (char_u *)pw->pw_dir;
}
if (var == NULL)
# endif
{
expand_T xpc;
ExpandInit(&xpc);
xpc.xp_context = EXPAND_FILES;
var = ExpandOne(&xpc, dst, NULL,
WILD_ADD_SLASH|WILD_SILENT, WILD_EXPAND_FREE);
mustfree = TRUE;
}
# else // !UNIX, thus VMS
/*
* USER_HOME is a comma-separated list of
* directories to search for the user account in.
*/
{
char_u test[MAXPATHL], paths[MAXPATHL];
char_u *path, *next_path, *ptr;
stat_T st;
STRCPY(paths, USER_HOME);
next_path = paths;
while (*next_path)
{
for (path = next_path; *next_path && *next_path != ',';
next_path++);
if (*next_path)
*next_path++ = NUL;
STRCPY(test, path);
STRCAT(test, "/");
STRCAT(test, dst + 1);
if (mch_stat(test, &st) == 0)
{
var = alloc(STRLEN(test) + 1);
STRCPY(var, test);
mustfree = TRUE;
break;
}
}
}
# endif // UNIX
#else
// cannot expand user's home directory, so don't try
var = NULL;
tail = (char_u *)""; // for gcc
#endif // UNIX || VMS
}
#ifdef BACKSLASH_IN_FILENAME
// If 'shellslash' is set change backslashes to forward slashes.
// Can't use slash_adjust(), p_ssl may be set temporarily.
if (p_ssl && var != NULL && vim_strchr(var, '\\') != NULL)
{
char_u *p = vim_strsave(var);
if (p != NULL)
{
if (mustfree)
vim_free(var);
var = p;
mustfree = TRUE;
forward_slash(var);
}
}
#endif
// If "var" contains white space, escape it with a backslash.
// Required for ":e ~/tt" when $HOME includes a space.
if (esc && var != NULL && vim_strpbrk(var, (char_u *)" \t") != NULL)
{
char_u *p = vim_strsave_escaped(var, (char_u *)" \t");
if (p != NULL)
{
if (mustfree)
vim_free(var);
var = p;
mustfree = TRUE;
}
}
if (var != NULL && *var != NUL
&& (STRLEN(var) + STRLEN(tail) + 1 < (unsigned)dstlen))
{
STRCPY(dst, var);
dstlen -= (int)STRLEN(var);
c = (int)STRLEN(var);
// if var[] ends in a path separator and tail[] starts
// with it, skip a character
if (after_pathsep(dst, dst + c)
#if defined(BACKSLASH_IN_FILENAME) || defined(AMIGA)
&& dst[c - 1] != ':'
#endif
&& vim_ispathsep(*tail))
++tail;
dst += c;
src = tail;
copy_char = FALSE;
}
if (mustfree)
vim_free(var);
}
if (copy_char) // copy at least one char
{
/*
* Recognize the start of a new name, for '~'.
* Don't do this when "one" is TRUE, to avoid expanding "~" in
* ":edit foo ~ foo".
*/
at_start = FALSE;
if (src[0] == '\\' && src[1] != NUL)
{
*dst++ = *src++;
--dstlen;
}
else if ((src[0] == ' ' || src[0] == ',') && !one)
at_start = TRUE;
if (dstlen > 0)
{
*dst++ = *src++;
--dstlen;
if (startstr != NULL && src - startstr_len >= srcp
&& STRNCMP(src - startstr_len, startstr,
startstr_len) == 0)
at_start = TRUE;
}
}
}
*dst = NUL;
}
/*
* If the string between "p" and "pend" ends in "name/", return "pend" minus
* the length of "name/". Otherwise return "pend".
*/
static char_u *
remove_tail(char_u *p, char_u *pend, char_u *name)
{
int len = (int)STRLEN(name) + 1;
char_u *newend = pend - len;
if (newend >= p
&& fnamencmp(newend, name, len - 1) == 0
&& (newend == p || after_pathsep(p, newend)))
return newend;
return pend;
}
/*
* Check if the directory "vimdir/<version>" or "vimdir/runtime" exists.
* Return NULL if not, return its name in allocated memory otherwise.
*/
static char_u *
vim_version_dir(char_u *vimdir)
{
char_u *p;
if (vimdir == NULL || *vimdir == NUL)
return NULL;
p = concat_fnames(vimdir, (char_u *)VIM_VERSION_NODOT, TRUE);
if (p != NULL && mch_isdir(p))
return p;
vim_free(p);
p = concat_fnames(vimdir, (char_u *)RUNTIME_DIRNAME, TRUE);
if (p != NULL && mch_isdir(p))
{
char_u *fname = concat_fnames(p, (char_u *)"defaults.vim", TRUE);
// Check that "defaults.vim" exists in this directory, to avoid picking
// up a stray "runtime" directory, it would make many tests fail in
// mysterious ways.
if (fname != NULL)
{
int exists = file_is_readable(fname);
vim_free(fname);
if (exists)
return p;
}
}
vim_free(p);
return NULL;
}
/*
* Vim's version of getenv().
* Special handling of $HOME, $VIM and $VIMRUNTIME.
* Also does ACP to 'enc' conversion for Win32.
* "mustfree" is set to TRUE when the returned string is allocated. It must be
* initialized to FALSE by the caller.
*/
char_u *
vim_getenv(char_u *name, int *mustfree)
{
char_u *p = NULL;
char_u *pend;
int vimruntime;
#ifdef MSWIN
WCHAR *wn, *wp;
// use "C:/" when $HOME is not set
if (STRCMP(name, "HOME") == 0)
return homedir;
// Use Wide function
wn = enc_to_utf16(name, NULL);
if (wn == NULL)
return NULL;
wp = _wgetenv(wn);
vim_free(wn);
if (wp != NULL && *wp == NUL) // empty is the same as not set
wp = NULL;
if (wp != NULL)
{
p = utf16_to_enc(wp, NULL);
if (p == NULL)
return NULL;
*mustfree = TRUE;
return p;
}
#else
p = mch_getenv(name);
if (p != NULL && *p == NUL) // empty is the same as not set
p = NULL;
if (p != NULL)
return p;
# ifdef __HAIKU__
// special handling for user settings directory...
if (STRCMP(name, "BE_USER_SETTINGS") == 0)
{
static char userSettingsPath[MAXPATHL];
if (find_directory(B_USER_SETTINGS_DIRECTORY, 0, false,
userSettingsPath, MAXPATHL) == B_OK)
return (char_u *)userSettingsPath;
else
return NULL;
}
# endif
#endif
// handling $VIMRUNTIME and $VIM is below, bail out if it's another name.
vimruntime = (STRCMP(name, "VIMRUNTIME") == 0);
if (!vimruntime && STRCMP(name, "VIM") != 0)
return NULL;
/*
* When expanding $VIMRUNTIME fails, try using $VIM/vim<version> or $VIM.
* Don't do this when default_vimruntime_dir is non-empty.
*/
if (vimruntime
#ifdef HAVE_PATHDEF
&& *default_vimruntime_dir == NUL
#endif
)
{
#ifdef MSWIN
// Use Wide function
wp = _wgetenv(L"VIM");
if (wp != NULL && *wp == NUL) // empty is the same as not set
wp = NULL;
if (wp != NULL)
{
char_u *q = utf16_to_enc(wp, NULL);
if (q != NULL)
{
p = vim_version_dir(q);
*mustfree = TRUE;
if (p == NULL)
p = q;
}
}
#else
p = mch_getenv((char_u *)"VIM");
if (p != NULL && *p == NUL) // empty is the same as not set
p = NULL;
if (p != NULL)
{
p = vim_version_dir(p);
if (p != NULL)
*mustfree = TRUE;
else
p = mch_getenv((char_u *)"VIM");
}
#endif
}
/*
* When expanding $VIM or $VIMRUNTIME fails, try using:
* - the directory name from 'helpfile' (unless it contains '$')
* - the executable name from argv[0]
*/
if (p == NULL)
{
if (p_hf != NULL && vim_strchr(p_hf, '$') == NULL)
p = p_hf;
#ifdef USE_EXE_NAME
/*
* Use the name of the executable, obtained from argv[0].
*/
else
p = exe_name;
#endif
if (p != NULL)
{
// remove the file name
pend = gettail(p);
// remove "doc/" from 'helpfile', if present
if (p == p_hf)
pend = remove_tail(p, pend, (char_u *)"doc");
#ifdef USE_EXE_NAME
# ifdef MACOS_X
// remove "MacOS" from exe_name and add "Resources/vim"
if (p == exe_name)
{
char_u *pend1;
char_u *pnew;
pend1 = remove_tail(p, pend, (char_u *)"MacOS");
if (pend1 != pend)
{
pnew = alloc(pend1 - p + 15);
if (pnew != NULL)
{
STRNCPY(pnew, p, (pend1 - p));
STRCPY(pnew + (pend1 - p), "Resources/vim");
p = pnew;
pend = p + STRLEN(p);
}
}
}
# endif
// remove "src/" from exe_name, if present
if (p == exe_name)
pend = remove_tail(p, pend, (char_u *)"src");
#endif
// for $VIM, remove "runtime/" or "vim54/", if present
if (!vimruntime)
{
pend = remove_tail(p, pend, (char_u *)RUNTIME_DIRNAME);
pend = remove_tail(p, pend, (char_u *)VIM_VERSION_NODOT);
}
// remove trailing path separator
if (pend > p && after_pathsep(p, pend))
--pend;
#ifdef MACOS_X
if (p == exe_name || p == p_hf)
#endif
// check that the result is a directory name
p = vim_strnsave(p, pend - p);
if (p != NULL && !mch_isdir(p))
VIM_CLEAR(p);
else
{
#ifdef USE_EXE_NAME
// may add "/vim54" or "/runtime" if it exists
if (vimruntime && (pend = vim_version_dir(p)) != NULL)
{
vim_free(p);
p = pend;
}
#endif
*mustfree = TRUE;
}
}
}
#ifdef HAVE_PATHDEF
// When there is a pathdef.c file we can use default_vim_dir and
// default_vimruntime_dir
if (p == NULL)
{
// Only use default_vimruntime_dir when it is not empty
if (vimruntime && *default_vimruntime_dir != NUL)
{
p = default_vimruntime_dir;
*mustfree = FALSE;
}
else if (*default_vim_dir != NUL)
{
if (vimruntime && (p = vim_version_dir(default_vim_dir)) != NULL)
*mustfree = TRUE;
else
{
p = default_vim_dir;
*mustfree = FALSE;
}
}
}
#endif
/*
* Set the environment variable, so that the new value can be found fast
* next time, and others can also use it (e.g. Perl).
*/
if (p != NULL)
{
if (vimruntime)
{
vim_setenv((char_u *)"VIMRUNTIME", p);
didset_vimruntime = TRUE;
}
else
{
vim_setenv((char_u *)"VIM", p);
didset_vim = TRUE;
}
}
return p;
}
void
vim_unsetenv(char_u *var)
{
#ifdef HAVE_UNSETENV
unsetenv((char *)var);
#else
vim_setenv(var, (char_u *)"");
#endif
}
/*
* Removes environment variable "name" and take care of side effects.
*/
void
vim_unsetenv_ext(char_u *var)
{
vim_unsetenv(var);
// "homedir" is not cleared, keep using the old value until $HOME is set.
if (STRICMP(var, "VIM") == 0)
didset_vim = FALSE;
else if (STRICMP(var, "VIMRUNTIME") == 0)
didset_vimruntime = FALSE;
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Set environment variable "name" and take care of side effects.
*/
void
vim_setenv_ext(char_u *name, char_u *val)
{
vim_setenv(name, val);
if (STRICMP(name, "HOME") == 0)
init_homedir();
else if (didset_vim && STRICMP(name, "VIM") == 0)
didset_vim = FALSE;
else if (didset_vimruntime && STRICMP(name, "VIMRUNTIME") == 0)
didset_vimruntime = FALSE;
}
#endif
/*
* Our portable version of setenv.
*/
void
vim_setenv(char_u *name, char_u *val)
{
#ifdef HAVE_SETENV
mch_setenv((char *)name, (char *)val, 1);
#else
char_u *envbuf;
/*
* Putenv does not copy the string, it has to remain
* valid. The allocated memory will never be freed.
*/
envbuf = alloc(STRLEN(name) + STRLEN(val) + 2);
if (envbuf != NULL)
{
sprintf((char *)envbuf, "%s=%s", name, val);
putenv((char *)envbuf);
}
#endif
#ifdef FEAT_GETTEXT
/*
* When setting $VIMRUNTIME adjust the directory to find message
* translations to $VIMRUNTIME/lang.
*/
if (*val != NUL && STRICMP(name, "VIMRUNTIME") == 0)
{
char_u *buf = concat_str(val, (char_u *)"/lang");
if (buf != NULL)
{
bindtextdomain(VIMPACKAGE, (char *)buf);
vim_free(buf);
}
}
#endif
}
/*
* Function given to ExpandGeneric() to obtain an environment variable name.
*/
char_u *
get_env_name(
expand_T *xp UNUSED,
int idx)
{
#if defined(AMIGA)
// No environ[] on the Amiga.
return NULL;
#else
# ifndef __WIN32__
// Borland C++ 5.2 has this in a header file.
extern char **environ;
# endif
char_u *str;
int n;
str = (char_u *)environ[idx];
if (str == NULL)
return NULL;
for (n = 0; n < EXPAND_BUF_LEN - 1; ++n)
{
if (str[n] == '=' || str[n] == NUL)
break;
xp->xp_buf[n] = str[n];
}
xp->xp_buf[n] = NUL;
return xp->xp_buf;
#endif
}
/*
* Add a user name to the list of users in ga_users.
* Do nothing if user name is NULL or empty.
*/
static void
add_user(char_u *user, int need_copy)
{
char_u *user_copy = (user != NULL && need_copy)
? vim_strsave(user) : user;
if (user_copy == NULL || *user_copy == NUL || ga_grow(&ga_users, 1) == FAIL)
{
if (need_copy)
vim_free(user_copy);
return;
}
((char_u **)(ga_users.ga_data))[ga_users.ga_len++] = user_copy;
}
/*
* Find all user names for user completion.
* Done only once and then cached.
*/
static void
init_users(void)
{
static int lazy_init_done = FALSE;
if (lazy_init_done)
return;
lazy_init_done = TRUE;
ga_init2(&ga_users, sizeof(char_u *), 20);
# if defined(HAVE_GETPWENT) && defined(HAVE_PWD_H)
{
struct passwd* pw;
setpwent();
while ((pw = getpwent()) != NULL)
add_user((char_u *)pw->pw_name, TRUE);
endpwent();
}
# elif defined(MSWIN)
{
DWORD nusers = 0, ntotal = 0, i;
PUSER_INFO_0 uinfo;
if (NetUserEnum(NULL, 0, 0, (LPBYTE *) &uinfo, MAX_PREFERRED_LENGTH,
&nusers, &ntotal, NULL) == NERR_Success)
{
for (i = 0; i < nusers; i++)
add_user(utf16_to_enc(uinfo[i].usri0_name, NULL), FALSE);
NetApiBufferFree(uinfo);
}
}
# endif
# if defined(HAVE_GETPWNAM)
{
char_u *user_env = mch_getenv((char_u *)"USER");
// The $USER environment variable may be a valid remote user name (NIS,
// LDAP) not already listed by getpwent(), as getpwent() only lists
// local user names. If $USER is not already listed, check whether it
// is a valid remote user name using getpwnam() and if it is, add it to
// the list of user names.
if (user_env != NULL && *user_env != NUL)
{
int i;
for (i = 0; i < ga_users.ga_len; i++)
{
char_u *local_user = ((char_u **)ga_users.ga_data)[i];
if (STRCMP(local_user, user_env) == 0)
break;
}
if (i == ga_users.ga_len)
{
struct passwd *pw = getpwnam((char *)user_env);
if (pw != NULL)
add_user((char_u *)pw->pw_name, TRUE);
}
}
}
# endif
}
/*
* Function given to ExpandGeneric() to obtain user names.
*/
char_u*
get_users(expand_T *xp UNUSED, int idx)
{
init_users();
if (idx < ga_users.ga_len)
return ((char_u **)ga_users.ga_data)[idx];
return NULL;
}
/*
* Check whether name matches a user name. Return:
* 0 if name does not match any user name.
* 1 if name partially matches the beginning of a user name.
* 2 is name fully matches a user name.
*/
int
match_user(char_u *name)
{
int i;
int n = (int)STRLEN(name);
int result = 0;
init_users();
for (i = 0; i < ga_users.ga_len; i++)
{
if (STRCMP(((char_u **)ga_users.ga_data)[i], name) == 0)
return 2; // full match
if (STRNCMP(((char_u **)ga_users.ga_data)[i], name, n) == 0)
result = 1; // partial match
}
return result;
}
static void
prepare_to_exit(void)
{
#if defined(SIGHUP) && defined(SIG_IGN)
// Ignore SIGHUP, because a dropped connection causes a read error, which
// makes Vim exit and then handling SIGHUP causes various reentrance
// problems.
mch_signal(SIGHUP, SIG_IGN);
#endif
#ifdef FEAT_GUI
if (gui.in_use)
{
gui.dying = TRUE;
out_trash(); // trash any pending output
}
else
#endif
{
windgoto((int)Rows - 1, 0);
/*
* Switch terminal mode back now, so messages end up on the "normal"
* screen (if there are two screens).
*/
settmode(TMODE_COOK);
stoptermcap();
out_flush();
}
}
/*
* Preserve files and exit.
* When called IObuff must contain a message.
* NOTE: This may be called from deathtrap() in a signal handler, avoid unsafe
* functions, such as allocating memory.
*/
void
preserve_exit(void)
{
buf_T *buf;
prepare_to_exit();
// Setting this will prevent free() calls. That avoids calling free()
// recursively when free() was invoked with a bad pointer.
really_exiting = TRUE;
out_str(IObuff);
screen_start(); // don't know where cursor is now
out_flush();
ml_close_notmod(); // close all not-modified buffers
FOR_ALL_BUFFERS(buf)
{
if (buf->b_ml.ml_mfp != NULL && buf->b_ml.ml_mfp->mf_fname != NULL)
{
OUT_STR("Vim: preserving files...\r\n");
screen_start(); // don't know where cursor is now
out_flush();
ml_sync_all(FALSE, FALSE); // preserve all swap files
break;
}
}
ml_close_all(FALSE); // close all memfiles, without deleting
OUT_STR("Vim: Finished.\r\n");
getout(1);
}
/*
* Check for CTRL-C pressed, but only once in a while.
* Should be used instead of ui_breakcheck() for functions that check for
* each line in the file. Calling ui_breakcheck() each time takes too much
* time, because it can be a system call.
*/
#ifndef BREAKCHECK_SKIP
# define BREAKCHECK_SKIP 1000
#endif
static int breakcheck_count = 0;
void
line_breakcheck(void)
{
if (++breakcheck_count >= BREAKCHECK_SKIP)
{
breakcheck_count = 0;
ui_breakcheck();
}
}
/*
* Like line_breakcheck() but check 10 times less often.
*/
void
fast_breakcheck(void)
{
if (++breakcheck_count >= BREAKCHECK_SKIP * 10)
{
breakcheck_count = 0;
ui_breakcheck();
}
}
# if defined(FEAT_SPELL) || defined(PROTO)
/*
* Like line_breakcheck() but check 100 times less often.
*/
void
veryfast_breakcheck(void)
{
if (++breakcheck_count >= BREAKCHECK_SKIP * 100)
{
breakcheck_count = 0;
ui_breakcheck();
}
}
#endif
#if defined(VIM_BACKTICK) || defined(FEAT_EVAL) \
|| (defined(HAVE_LOCALE_H) || defined(X_LOCALE)) \
|| defined(PROTO)
#ifndef SEEK_SET
# define SEEK_SET 0
#endif
#ifndef SEEK_END
# define SEEK_END 2
#endif
/*
* Get the stdout of an external command.
* If "ret_len" is NULL replace NUL characters with NL. When "ret_len" is not
* NULL store the length there.
* Returns an allocated string, or NULL for error.
*/
char_u *
get_cmd_output(
char_u *cmd,
char_u *infile, // optional input file name
int flags, // can be SHELL_SILENT
int *ret_len)
{
char_u *tempname;
char_u *command;
char_u *buffer = NULL;
int len;
int i = 0;
FILE *fd;
if (check_restricted() || check_secure())
return NULL;
// get a name for the temp file
if ((tempname = vim_tempname('o', FALSE)) == NULL)
{
emsg(_(e_cant_get_temp_file_name));
return NULL;
}
// Add the redirection stuff
command = make_filter_cmd(cmd, infile, tempname);
if (command == NULL)
goto done;
/*
* Call the shell to execute the command (errors are ignored).
* Don't check timestamps here.
*/
++no_check_timestamps;
call_shell(command, SHELL_DOOUT | SHELL_EXPAND | flags);
--no_check_timestamps;
vim_free(command);
/*
* read the names from the file into memory
*/
# ifdef VMS
// created temporary file is not always readable as binary
fd = mch_fopen((char *)tempname, "r");
# else
fd = mch_fopen((char *)tempname, READBIN);
# endif
// Not being able to seek means we can't read the file.
if (fd == NULL
|| fseek(fd, 0L, SEEK_END) == -1
|| (len = ftell(fd)) == -1 // get size of temp file
|| fseek(fd, 0L, SEEK_SET) == -1) // back to the start
{
semsg(_(e_cannot_read_from_str_2), tempname);
if (fd != NULL)
fclose(fd);
goto done;
}
buffer = alloc(len + 1);
if (buffer != NULL)
i = (int)fread((char *)buffer, (size_t)1, (size_t)len, fd);
fclose(fd);
mch_remove(tempname);
if (buffer == NULL)
goto done;
#ifdef VMS
len = i; // VMS doesn't give us what we asked for...
#endif
if (i != len)
{
semsg(_(e_cant_read_file_str), tempname);
VIM_CLEAR(buffer);
}
else if (ret_len == NULL)
{
// Change NUL into SOH, otherwise the string is truncated.
for (i = 0; i < len; ++i)
if (buffer[i] == NUL)
buffer[i] = 1;
buffer[len] = NUL; // make sure the buffer is terminated
}
else
*ret_len = len;
done:
vim_free(tempname);
return buffer;
}
# if defined(FEAT_EVAL) || defined(PROTO)
static void
get_cmd_output_as_rettv(
typval_T *argvars,
typval_T *rettv,
int retlist)
{
char_u *res = NULL;
char_u *p;
char_u *infile = NULL;
int err = FALSE;
FILE *fd;
list_T *list = NULL;
int flags = SHELL_SILENT;
rettv->v_type = VAR_STRING;
rettv->vval.v_string = NULL;
if (check_restricted() || check_secure())
goto errret;
if (in_vim9script()
&& (check_for_string_arg(argvars, 0) == FAIL
|| check_for_opt_string_or_number_or_list_arg(argvars, 1)
== FAIL))
return;
if (argvars[1].v_type != VAR_UNKNOWN)
{
/*
* Write the text to a temp file, to be used for input of the shell
* command.
*/
if ((infile = vim_tempname('i', TRUE)) == NULL)
{
emsg(_(e_cant_get_temp_file_name));
goto errret;
}
fd = mch_fopen((char *)infile, WRITEBIN);
if (fd == NULL)
{
semsg(_(e_cant_open_file_str), infile);
goto errret;
}
if (argvars[1].v_type == VAR_NUMBER)
{
linenr_T lnum;
buf_T *buf;
buf = buflist_findnr(argvars[1].vval.v_number);
if (buf == NULL)
{
semsg(_(e_buffer_nr_does_not_exist), argvars[1].vval.v_number);
fclose(fd);
goto errret;
}
for (lnum = 1; lnum <= buf->b_ml.ml_line_count; lnum++)
{
for (p = ml_get_buf(buf, lnum, FALSE); *p != NUL; ++p)
if (putc(*p == '\n' ? NUL : *p, fd) == EOF)
{
err = TRUE;
break;
}
if (putc(NL, fd) == EOF)
{
err = TRUE;
break;
}
}
}
else if (argvars[1].v_type == VAR_LIST)
{
if (write_list(fd, argvars[1].vval.v_list, TRUE) == FAIL)
err = TRUE;
}
else
{
size_t len;
char_u buf[NUMBUFLEN];
p = tv_get_string_buf_chk(&argvars[1], buf);
if (p == NULL)
{
fclose(fd);
goto errret; // type error; errmsg already given
}
len = STRLEN(p);
if (len > 0 && fwrite(p, len, 1, fd) != 1)
err = TRUE;
}
if (fclose(fd) != 0)
err = TRUE;
if (err)
{
emsg(_(e_error_writing_temp_file));
goto errret;
}
}
// Omit SHELL_COOKED when invoked with ":silent". Avoids that the shell
// echoes typeahead, that messes up the display.
if (!msg_silent)
flags += SHELL_COOKED;
if (retlist)
{
int len;
listitem_T *li;
char_u *s = NULL;
char_u *start;
char_u *end;
int i;
res = get_cmd_output(tv_get_string(&argvars[0]), infile, flags, &len);
if (res == NULL)
goto errret;
list = list_alloc();
if (list == NULL)
goto errret;
for (i = 0; i < len; ++i)
{
start = res + i;
while (i < len && res[i] != NL)
++i;
end = res + i;
s = alloc(end - start + 1);
if (s == NULL)
goto errret;
for (p = s; start < end; ++p, ++start)
*p = *start == NUL ? NL : *start;
*p = NUL;
li = listitem_alloc();
if (li == NULL)
{
vim_free(s);
goto errret;
}
li->li_tv.v_type = VAR_STRING;
li->li_tv.v_lock = 0;
li->li_tv.vval.v_string = s;
list_append(list, li);
}
rettv_list_set(rettv, list);
list = NULL;
}
else
{
res = get_cmd_output(tv_get_string(&argvars[0]), infile, flags, NULL);
#ifdef USE_CRNL
// translate <CR><NL> into <NL>
if (res != NULL)
{
char_u *s, *d;
d = res;
for (s = res; *s; ++s)
{
if (s[0] == CAR && s[1] == NL)
++s;
*d++ = *s;
}
*d = NUL;
}
#endif
rettv->vval.v_string = res;
res = NULL;
}
errret:
if (infile != NULL)
{
mch_remove(infile);
vim_free(infile);
}
if (res != NULL)
vim_free(res);
if (list != NULL)
list_free(list);
}
/*
* "system()" function
*/
void
f_system(typval_T *argvars, typval_T *rettv)
{
get_cmd_output_as_rettv(argvars, rettv, FALSE);
}
/*
* "systemlist()" function
*/
void
f_systemlist(typval_T *argvars, typval_T *rettv)
{
get_cmd_output_as_rettv(argvars, rettv, TRUE);
}
# endif // FEAT_EVAL
#endif
/*
* Return TRUE when need to go to Insert mode because of 'insertmode'.
* Don't do this when still processing a command or a mapping.
* Don't do this when inside a ":normal" command.
*/
int
goto_im(void)
{
return (p_im && stuff_empty() && typebuf_typed());
}
/*
* Returns the isolated name of the shell in allocated memory:
* - Skip beyond any path. E.g., "/usr/bin/csh -f" -> "csh -f".
* - Remove any argument. E.g., "csh -f" -> "csh".
* But don't allow a space in the path, so that this works:
* "/usr/bin/csh --rcfile ~/.cshrc"
* But don't do that for Windows, it's common to have a space in the path.
* Returns NULL when out of memory.
*/
char_u *
get_isolated_shell_name(void)
{
char_u *p;
#ifdef MSWIN
p = gettail(p_sh);
p = vim_strnsave(p, skiptowhite(p) - p);
#else
p = skiptowhite(p_sh);
if (*p == NUL)
{
// No white space, use the tail.
p = vim_strsave(gettail(p_sh));
}
else
{
char_u *p1, *p2;
// Find the last path separator before the space.
p1 = p_sh;
for (p2 = p_sh; p2 < p; MB_PTR_ADV(p2))
if (vim_ispathsep(*p2))
p1 = p2 + 1;
p = vim_strnsave(p1, p - p1);
}
#endif
return p;
}
/*
* Check if the "://" of a URL is at the pointer, return URL_SLASH.
* Also check for ":\\", which MS Internet Explorer accepts, return
* URL_BACKSLASH.
*/
int
path_is_url(char_u *p)
{
if (STRNCMP(p, "://", (size_t)3) == 0)
return URL_SLASH;
else if (STRNCMP(p, ":\\\\", (size_t)3) == 0)
return URL_BACKSLASH;
return 0;
}
/*
* Check if "fname" starts with "name://" or "name:\\".
* Return URL_SLASH for "name://", URL_BACKSLASH for "name:\\".
* Return zero otherwise.
*/
int
path_with_url(char_u *fname)
{
char_u *p;
// We accept alphabetic characters and a dash in scheme part.
// RFC 3986 allows for more, but it increases the risk of matching
// non-URL text.
// first character must be alpha
if (!ASCII_ISALPHA(*fname))
return 0;
// check body: alpha or dash
for (p = fname + 1; (ASCII_ISALPHA(*p) || (*p == '-')); ++p)
;
// check last char is not a dash
if (p[-1] == '-')
return 0;
// "://" or ":\\" must follow
return path_is_url(p);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Return the dictionary of v:event.
* Save and clear the value in case it already has items.
*/
dict_T *
get_v_event(save_v_event_T *sve)
{
dict_T *v_event = get_vim_var_dict(VV_EVENT);
if (v_event->dv_hashtab.ht_used > 0)
{
// recursive use of v:event, save, make empty and restore later
sve->sve_did_save = TRUE;
sve->sve_hashtab = v_event->dv_hashtab;
hash_init(&v_event->dv_hashtab);
}
else
sve->sve_did_save = FALSE;
return v_event;
}
void
restore_v_event(dict_T *v_event, save_v_event_T *sve)
{
dict_free_contents(v_event);
if (sve->sve_did_save)
v_event->dv_hashtab = sve->sve_hashtab;
else
hash_init(&v_event->dv_hashtab);
}
#endif
/*
* Fires a ModeChanged autocmd event if appropriate.
*/
void
may_trigger_modechanged(void)
{
#ifdef FEAT_EVAL
dict_T *v_event;
save_v_event_T save_v_event;
char_u curr_mode[MODE_MAX_LENGTH];
char_u pattern_buf[2 * MODE_MAX_LENGTH];
// Skip this when got_int is set, the autocommand will not be executed.
// Better trigger it next time.
if (!has_modechanged() || got_int)
return;
get_mode(curr_mode);
if (STRCMP(curr_mode, last_mode) == 0)
return;
v_event = get_v_event(&save_v_event);
(void)dict_add_string(v_event, "new_mode", curr_mode);
(void)dict_add_string(v_event, "old_mode", last_mode);
dict_set_items_ro(v_event);
// concatenate modes in format "old_mode:new_mode"
vim_snprintf((char *)pattern_buf, sizeof(pattern_buf), "%s:%s", last_mode,
curr_mode);
apply_autocmds(EVENT_MODECHANGED, pattern_buf, NULL, FALSE, curbuf);
STRCPY(last_mode, curr_mode);
restore_v_event(v_event, &save_v_event);
#endif
}
// For overflow detection, add a digit safely to a long value.
int
vim_append_digit_long(long *value, int digit)
{
long x = *value;
if (x > ((LONG_MAX - (long)digit) / 10))
return FAIL;
*value = x * 10 + (long)digit;
return OK;
}
// Return something that fits into an int.
int
trim_to_int(vimlong_T x)
{
return x > INT_MAX ? INT_MAX : x < INT_MIN ? INT_MIN : x;
}
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