forked from b4winckler/macvim
/
misc2.c
6532 lines (5946 loc) · 151 KB
/
misc2.c
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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* misc2.c: Various functions.
*/
#include "vim.h"
static char_u *username = NULL; /* cached result of mch_get_user_name() */
static char_u *ff_expand_buffer = NULL; /* used for expanding filenames */
#if defined(FEAT_VIRTUALEDIT) || defined(PROTO)
static int coladvance2 __ARGS((pos_T *pos, int addspaces, int finetune, colnr_T wcol));
/*
* Return TRUE if in the current mode we need to use virtual.
*/
int
virtual_active()
{
/* While an operator is being executed we return "virtual_op", because
* VIsual_active has already been reset, thus we can't check for "block"
* being used. */
if (virtual_op != MAYBE)
return virtual_op;
return (ve_flags == VE_ALL
# ifdef FEAT_VISUAL
|| ((ve_flags & VE_BLOCK) && VIsual_active && VIsual_mode == Ctrl_V)
# endif
|| ((ve_flags & VE_INSERT) && (State & INSERT)));
}
/*
* Get the screen position of the cursor.
*/
int
getviscol()
{
colnr_T x;
getvvcol(curwin, &curwin->w_cursor, &x, NULL, NULL);
return (int)x;
}
/*
* Get the screen position of character col with a coladd in the cursor line.
*/
int
getviscol2(col, coladd)
colnr_T col;
colnr_T coladd;
{
colnr_T x;
pos_T pos;
pos.lnum = curwin->w_cursor.lnum;
pos.col = col;
pos.coladd = coladd;
getvvcol(curwin, &pos, &x, NULL, NULL);
return (int)x;
}
/*
* Go to column "wcol", and add/insert white space as necessary to get the
* cursor in that column.
* The caller must have saved the cursor line for undo!
*/
int
coladvance_force(wcol)
colnr_T wcol;
{
int rc = coladvance2(&curwin->w_cursor, TRUE, FALSE, wcol);
if (wcol == MAXCOL)
curwin->w_valid &= ~VALID_VIRTCOL;
else
{
/* Virtcol is valid */
curwin->w_valid |= VALID_VIRTCOL;
curwin->w_virtcol = wcol;
}
return rc;
}
#endif
/*
* Try to advance the Cursor to the specified screen column.
* If virtual editing: fine tune the cursor position.
* Note that all virtual positions off the end of a line should share
* a curwin->w_cursor.col value (n.b. this is equal to STRLEN(line)),
* beginning at coladd 0.
*
* return OK if desired column is reached, FAIL if not
*/
int
coladvance(wcol)
colnr_T wcol;
{
int rc = getvpos(&curwin->w_cursor, wcol);
if (wcol == MAXCOL || rc == FAIL)
curwin->w_valid &= ~VALID_VIRTCOL;
else if (*ml_get_cursor() != TAB)
{
/* Virtcol is valid when not on a TAB */
curwin->w_valid |= VALID_VIRTCOL;
curwin->w_virtcol = wcol;
}
return rc;
}
/*
* Return in "pos" the position of the cursor advanced to screen column "wcol".
* return OK if desired column is reached, FAIL if not
*/
int
getvpos(pos, wcol)
pos_T *pos;
colnr_T wcol;
{
#ifdef FEAT_VIRTUALEDIT
return coladvance2(pos, FALSE, virtual_active(), wcol);
}
static int
coladvance2(pos, addspaces, finetune, wcol)
pos_T *pos;
int addspaces; /* change the text to achieve our goal? */
int finetune; /* change char offset for the exact column */
colnr_T wcol; /* column to move to */
{
#endif
int idx;
char_u *ptr;
char_u *line;
colnr_T col = 0;
int csize = 0;
int one_more;
#ifdef FEAT_LINEBREAK
int head = 0;
#endif
one_more = (State & INSERT)
|| restart_edit != NUL
#ifdef FEAT_VISUAL
|| (VIsual_active && *p_sel != 'o')
#endif
#ifdef FEAT_VIRTUALEDIT
|| ((ve_flags & VE_ONEMORE) && wcol < MAXCOL)
#endif
;
line = ml_get_buf(curbuf, pos->lnum, FALSE);
if (wcol >= MAXCOL)
{
idx = (int)STRLEN(line) - 1 + one_more;
col = wcol;
#ifdef FEAT_VIRTUALEDIT
if ((addspaces || finetune) && !VIsual_active)
{
curwin->w_curswant = linetabsize(line) + one_more;
if (curwin->w_curswant > 0)
--curwin->w_curswant;
}
#endif
}
else
{
#ifdef FEAT_VIRTUALEDIT
int width = W_WIDTH(curwin) - win_col_off(curwin);
if (finetune
&& curwin->w_p_wrap
# ifdef FEAT_VERTSPLIT
&& curwin->w_width != 0
# endif
&& wcol >= (colnr_T)width)
{
csize = linetabsize(line);
if (csize > 0)
csize--;
if (wcol / width > (colnr_T)csize / width
&& ((State & INSERT) == 0 || (int)wcol > csize + 1))
{
/* In case of line wrapping don't move the cursor beyond the
* right screen edge. In Insert mode allow going just beyond
* the last character (like what happens when typing and
* reaching the right window edge). */
wcol = (csize / width + 1) * width - 1;
}
}
#endif
ptr = line;
while (col <= wcol && *ptr != NUL)
{
/* Count a tab for what it's worth (if list mode not on) */
#ifdef FEAT_LINEBREAK
csize = win_lbr_chartabsize(curwin, ptr, col, &head);
mb_ptr_adv(ptr);
#else
csize = lbr_chartabsize_adv(&ptr, col);
#endif
col += csize;
}
idx = (int)(ptr - line);
/*
* Handle all the special cases. The virtual_active() check
* is needed to ensure that a virtual position off the end of
* a line has the correct indexing. The one_more comparison
* replaces an explicit add of one_more later on.
*/
if (col > wcol || (!virtual_active() && one_more == 0))
{
idx -= 1;
# ifdef FEAT_LINEBREAK
/* Don't count the chars from 'showbreak'. */
csize -= head;
# endif
col -= csize;
}
#ifdef FEAT_VIRTUALEDIT
if (virtual_active()
&& addspaces
&& ((col != wcol && col != wcol + 1) || csize > 1))
{
/* 'virtualedit' is set: The difference between wcol and col is
* filled with spaces. */
if (line[idx] == NUL)
{
/* Append spaces */
int correct = wcol - col;
char_u *newline = alloc(idx + correct + 1);
int t;
if (newline == NULL)
return FAIL;
for (t = 0; t < idx; ++t)
newline[t] = line[t];
for (t = 0; t < correct; ++t)
newline[t + idx] = ' ';
newline[idx + correct] = NUL;
ml_replace(pos->lnum, newline, FALSE);
changed_bytes(pos->lnum, (colnr_T)idx);
idx += correct;
col = wcol;
}
else
{
/* Break a tab */
int linelen = (int)STRLEN(line);
int correct = wcol - col - csize + 1; /* negative!! */
char_u *newline;
int t, s = 0;
int v;
if (-correct > csize)
return FAIL;
newline = alloc(linelen + csize);
if (newline == NULL)
return FAIL;
for (t = 0; t < linelen; t++)
{
if (t != idx)
newline[s++] = line[t];
else
for (v = 0; v < csize; v++)
newline[s++] = ' ';
}
newline[linelen + csize - 1] = NUL;
ml_replace(pos->lnum, newline, FALSE);
changed_bytes(pos->lnum, idx);
idx += (csize - 1 + correct);
col += correct;
}
}
#endif
}
if (idx < 0)
pos->col = 0;
else
pos->col = idx;
#ifdef FEAT_VIRTUALEDIT
pos->coladd = 0;
if (finetune)
{
if (wcol == MAXCOL)
{
/* The width of the last character is used to set coladd. */
if (!one_more)
{
colnr_T scol, ecol;
getvcol(curwin, pos, &scol, NULL, &ecol);
pos->coladd = ecol - scol;
}
}
else
{
int b = (int)wcol - (int)col;
/* The difference between wcol and col is used to set coladd. */
if (b > 0 && b < (MAXCOL - 2 * W_WIDTH(curwin)))
pos->coladd = b;
col += b;
}
}
#endif
#ifdef FEAT_MBYTE
/* prevent from moving onto a trail byte */
if (has_mbyte)
mb_adjustpos(curbuf, pos);
#endif
if (col < wcol)
return FAIL;
return OK;
}
/*
* Increment the cursor position. See inc() for return values.
*/
int
inc_cursor()
{
return inc(&curwin->w_cursor);
}
/*
* Increment the line pointer "lp" crossing line boundaries as necessary.
* Return 1 when going to the next line.
* Return 2 when moving forward onto a NUL at the end of the line).
* Return -1 when at the end of file.
* Return 0 otherwise.
*/
int
inc(lp)
pos_T *lp;
{
char_u *p = ml_get_pos(lp);
if (*p != NUL) /* still within line, move to next char (may be NUL) */
{
#ifdef FEAT_MBYTE
if (has_mbyte)
{
int l = (*mb_ptr2len)(p);
lp->col += l;
return ((p[l] != NUL) ? 0 : 2);
}
#endif
lp->col++;
#ifdef FEAT_VIRTUALEDIT
lp->coladd = 0;
#endif
return ((p[1] != NUL) ? 0 : 2);
}
if (lp->lnum != curbuf->b_ml.ml_line_count) /* there is a next line */
{
lp->col = 0;
lp->lnum++;
#ifdef FEAT_VIRTUALEDIT
lp->coladd = 0;
#endif
return 1;
}
return -1;
}
/*
* incl(lp): same as inc(), but skip the NUL at the end of non-empty lines
*/
int
incl(lp)
pos_T *lp;
{
int r;
if ((r = inc(lp)) >= 1 && lp->col)
r = inc(lp);
return r;
}
/*
* dec(p)
*
* Decrement the line pointer 'p' crossing line boundaries as necessary.
* Return 1 when crossing a line, -1 when at start of file, 0 otherwise.
*/
int
dec_cursor()
{
return dec(&curwin->w_cursor);
}
int
dec(lp)
pos_T *lp;
{
char_u *p;
#ifdef FEAT_VIRTUALEDIT
lp->coladd = 0;
#endif
if (lp->col > 0) /* still within line */
{
lp->col--;
#ifdef FEAT_MBYTE
if (has_mbyte)
{
p = ml_get(lp->lnum);
lp->col -= (*mb_head_off)(p, p + lp->col);
}
#endif
return 0;
}
if (lp->lnum > 1) /* there is a prior line */
{
lp->lnum--;
p = ml_get(lp->lnum);
lp->col = (colnr_T)STRLEN(p);
#ifdef FEAT_MBYTE
if (has_mbyte)
lp->col -= (*mb_head_off)(p, p + lp->col);
#endif
return 1;
}
return -1; /* at start of file */
}
/*
* decl(lp): same as dec(), but skip the NUL at the end of non-empty lines
*/
int
decl(lp)
pos_T *lp;
{
int r;
if ((r = dec(lp)) == 1 && lp->col)
r = dec(lp);
return r;
}
/*
* Get the line number relative to the current cursor position, i.e. the
* difference between line number and cursor position. Only look for lines that
* can be visible, folded lines don't count.
*/
linenr_T
get_cursor_rel_lnum(wp, lnum)
win_T *wp;
linenr_T lnum; /* line number to get the result for */
{
linenr_T cursor = wp->w_cursor.lnum;
linenr_T retval = 0;
#ifdef FEAT_FOLDING
if (hasAnyFolding(wp))
{
if (lnum > cursor)
{
while (lnum > cursor)
{
(void)hasFolding(lnum, &lnum, NULL);
/* if lnum and cursor are in the same fold,
* now lnum <= cursor */
if (lnum > cursor)
retval++;
lnum--;
}
}
else if (lnum < cursor)
{
while (lnum < cursor)
{
(void)hasFolding(lnum, NULL, &lnum);
/* if lnum and cursor are in the same fold,
* now lnum >= cursor */
if (lnum < cursor)
retval--;
lnum++;
}
}
/* else if (lnum == cursor)
* retval = 0;
*/
}
else
#endif
retval = lnum - cursor;
return retval;
}
/*
* Make sure curwin->w_cursor.lnum is valid.
*/
void
check_cursor_lnum()
{
if (curwin->w_cursor.lnum > curbuf->b_ml.ml_line_count)
{
#ifdef FEAT_FOLDING
/* If there is a closed fold at the end of the file, put the cursor in
* its first line. Otherwise in the last line. */
if (!hasFolding(curbuf->b_ml.ml_line_count,
&curwin->w_cursor.lnum, NULL))
#endif
curwin->w_cursor.lnum = curbuf->b_ml.ml_line_count;
}
if (curwin->w_cursor.lnum <= 0)
curwin->w_cursor.lnum = 1;
}
/*
* Make sure curwin->w_cursor.col is valid.
*/
void
check_cursor_col()
{
check_cursor_col_win(curwin);
}
/*
* Make sure win->w_cursor.col is valid.
*/
void
check_cursor_col_win(win)
win_T *win;
{
colnr_T len;
#ifdef FEAT_VIRTUALEDIT
colnr_T oldcol = win->w_cursor.col;
colnr_T oldcoladd = win->w_cursor.col + win->w_cursor.coladd;
#endif
len = (colnr_T)STRLEN(ml_get_buf(win->w_buffer, win->w_cursor.lnum, FALSE));
if (len == 0)
win->w_cursor.col = 0;
else if (win->w_cursor.col >= len)
{
/* Allow cursor past end-of-line when:
* - in Insert mode or restarting Insert mode
* - in Visual mode and 'selection' isn't "old"
* - 'virtualedit' is set */
if ((State & INSERT) || restart_edit
#ifdef FEAT_VISUAL
|| (VIsual_active && *p_sel != 'o')
#endif
#ifdef FEAT_VIRTUALEDIT
|| (ve_flags & VE_ONEMORE)
#endif
|| virtual_active())
win->w_cursor.col = len;
else
{
win->w_cursor.col = len - 1;
#ifdef FEAT_MBYTE
/* Move the cursor to the head byte. */
if (has_mbyte)
mb_adjustpos(win->w_buffer, &win->w_cursor);
#endif
}
}
else if (win->w_cursor.col < 0)
win->w_cursor.col = 0;
#ifdef FEAT_VIRTUALEDIT
/* If virtual editing is on, we can leave the cursor on the old position,
* only we must set it to virtual. But don't do it when at the end of the
* line. */
if (oldcol == MAXCOL)
win->w_cursor.coladd = 0;
else if (ve_flags == VE_ALL)
{
if (oldcoladd > win->w_cursor.col)
win->w_cursor.coladd = oldcoladd - win->w_cursor.col;
else
/* avoid weird number when there is a miscalculation or overflow */
win->w_cursor.coladd = 0;
}
#endif
}
/*
* make sure curwin->w_cursor in on a valid character
*/
void
check_cursor()
{
check_cursor_lnum();
check_cursor_col();
}
#if defined(FEAT_TEXTOBJ) || defined(PROTO)
/*
* Make sure curwin->w_cursor is not on the NUL at the end of the line.
* Allow it when in Visual mode and 'selection' is not "old".
*/
void
adjust_cursor_col()
{
if (curwin->w_cursor.col > 0
# ifdef FEAT_VISUAL
&& (!VIsual_active || *p_sel == 'o')
# endif
&& gchar_cursor() == NUL)
--curwin->w_cursor.col;
}
#endif
/*
* When curwin->w_leftcol has changed, adjust the cursor position.
* Return TRUE if the cursor was moved.
*/
int
leftcol_changed()
{
long lastcol;
colnr_T s, e;
int retval = FALSE;
changed_cline_bef_curs();
lastcol = curwin->w_leftcol + W_WIDTH(curwin) - curwin_col_off() - 1;
validate_virtcol();
/*
* If the cursor is right or left of the screen, move it to last or first
* character.
*/
if (curwin->w_virtcol > (colnr_T)(lastcol - p_siso))
{
retval = TRUE;
coladvance((colnr_T)(lastcol - p_siso));
}
else if (curwin->w_virtcol < curwin->w_leftcol + p_siso)
{
retval = TRUE;
(void)coladvance((colnr_T)(curwin->w_leftcol + p_siso));
}
/*
* If the start of the character under the cursor is not on the screen,
* advance the cursor one more char. If this fails (last char of the
* line) adjust the scrolling.
*/
getvvcol(curwin, &curwin->w_cursor, &s, NULL, &e);
if (e > (colnr_T)lastcol)
{
retval = TRUE;
coladvance(s - 1);
}
else if (s < curwin->w_leftcol)
{
retval = TRUE;
if (coladvance(e + 1) == FAIL) /* there isn't another character */
{
curwin->w_leftcol = s; /* adjust w_leftcol instead */
changed_cline_bef_curs();
}
}
if (retval)
curwin->w_set_curswant = TRUE;
redraw_later(NOT_VALID);
return retval;
}
/**********************************************************************
* Various routines dealing with allocation and deallocation of memory.
*/
#if defined(MEM_PROFILE) || defined(PROTO)
# define MEM_SIZES 8200
static long_u mem_allocs[MEM_SIZES];
static long_u mem_frees[MEM_SIZES];
static long_u mem_allocated;
static long_u mem_freed;
static long_u mem_peak;
static long_u num_alloc;
static long_u num_freed;
static void mem_pre_alloc_s __ARGS((size_t *sizep));
static void mem_pre_alloc_l __ARGS((long_u *sizep));
static void mem_post_alloc __ARGS((void **pp, size_t size));
static void mem_pre_free __ARGS((void **pp));
static void
mem_pre_alloc_s(sizep)
size_t *sizep;
{
*sizep += sizeof(size_t);
}
static void
mem_pre_alloc_l(sizep)
long_u *sizep;
{
*sizep += sizeof(size_t);
}
static void
mem_post_alloc(pp, size)
void **pp;
size_t size;
{
if (*pp == NULL)
return;
size -= sizeof(size_t);
*(long_u *)*pp = size;
if (size <= MEM_SIZES-1)
mem_allocs[size-1]++;
else
mem_allocs[MEM_SIZES-1]++;
mem_allocated += size;
if (mem_allocated - mem_freed > mem_peak)
mem_peak = mem_allocated - mem_freed;
num_alloc++;
*pp = (void *)((char *)*pp + sizeof(size_t));
}
static void
mem_pre_free(pp)
void **pp;
{
long_u size;
*pp = (void *)((char *)*pp - sizeof(size_t));
size = *(size_t *)*pp;
if (size <= MEM_SIZES-1)
mem_frees[size-1]++;
else
mem_frees[MEM_SIZES-1]++;
mem_freed += size;
num_freed++;
}
/*
* called on exit via atexit()
*/
void
vim_mem_profile_dump()
{
int i, j;
printf("\r\n");
j = 0;
for (i = 0; i < MEM_SIZES - 1; i++)
{
if (mem_allocs[i] || mem_frees[i])
{
if (mem_frees[i] > mem_allocs[i])
printf("\r\n%s", _("ERROR: "));
printf("[%4d / %4lu-%-4lu] ", i + 1, mem_allocs[i], mem_frees[i]);
j++;
if (j > 3)
{
j = 0;
printf("\r\n");
}
}
}
i = MEM_SIZES - 1;
if (mem_allocs[i])
{
printf("\r\n");
if (mem_frees[i] > mem_allocs[i])
puts(_("ERROR: "));
printf("[>%d / %4lu-%-4lu]", i, mem_allocs[i], mem_frees[i]);
}
printf(_("\n[bytes] total alloc-freed %lu-%lu, in use %lu, peak use %lu\n"),
mem_allocated, mem_freed, mem_allocated - mem_freed, mem_peak);
printf(_("[calls] total re/malloc()'s %lu, total free()'s %lu\n\n"),
num_alloc, num_freed);
}
#endif /* MEM_PROFILE */
/*
* Some memory is reserved for error messages and for being able to
* call mf_release_all(), which needs some memory for mf_trans_add().
*/
#if defined(MSDOS) && !defined(DJGPP)
# define SMALL_MEM
# define KEEP_ROOM 8192L
#else
# define KEEP_ROOM (2 * 8192L)
#endif
/*
* Note: if unsigned is 16 bits we can only allocate up to 64K with alloc().
* Use lalloc for larger blocks.
*/
char_u *
alloc(size)
unsigned size;
{
return (lalloc((long_u)size, TRUE));
}
/*
* Allocate memory and set all bytes to zero.
*/
char_u *
alloc_clear(size)
unsigned size;
{
char_u *p;
p = lalloc((long_u)size, TRUE);
if (p != NULL)
(void)vim_memset(p, 0, (size_t)size);
return p;
}
/*
* alloc() with check for maximum line length
*/
char_u *
alloc_check(size)
unsigned size;
{
#if !defined(UNIX) && !defined(__EMX__)
if (sizeof(int) == 2 && size > 0x7fff)
{
/* Don't hide this message */
emsg_silent = 0;
EMSG(_("E340: Line is becoming too long"));
return NULL;
}
#endif
return (lalloc((long_u)size, TRUE));
}
/*
* Allocate memory like lalloc() and set all bytes to zero.
*/
char_u *
lalloc_clear(size, message)
long_u size;
int message;
{
char_u *p;
p = (lalloc(size, message));
if (p != NULL)
(void)vim_memset(p, 0, (size_t)size);
return p;
}
/*
* Low level memory allocation function.
* This is used often, KEEP IT FAST!
*/
char_u *
lalloc(size, message)
long_u size;
int message;
{
char_u *p; /* pointer to new storage space */
static int releasing = FALSE; /* don't do mf_release_all() recursive */
int try_again;
#if defined(HAVE_AVAIL_MEM) && !defined(SMALL_MEM)
static long_u allocated = 0; /* allocated since last avail check */
#endif
/* Safety check for allocating zero bytes */
if (size == 0)
{
/* Don't hide this message */
emsg_silent = 0;
EMSGN(_("E341: Internal error: lalloc(%ld, )"), size);
return NULL;
}
#ifdef MEM_PROFILE
mem_pre_alloc_l(&size);
#endif
#if defined(MSDOS) && !defined(DJGPP)
if (size >= 0xfff0) /* in MSDOS we can't deal with >64K blocks */
p = NULL;
else
#endif
/*
* Loop when out of memory: Try to release some memfile blocks and
* if some blocks are released call malloc again.
*/
for (;;)
{
/*
* Handle three kind of systems:
* 1. No check for available memory: Just return.
* 2. Slow check for available memory: call mch_avail_mem() after
* allocating KEEP_ROOM amount of memory.
* 3. Strict check for available memory: call mch_avail_mem()
*/
if ((p = (char_u *)malloc((size_t)size)) != NULL)
{
#ifndef HAVE_AVAIL_MEM
/* 1. No check for available memory: Just return. */
goto theend;
#else
# ifndef SMALL_MEM
/* 2. Slow check for available memory: call mch_avail_mem() after
* allocating (KEEP_ROOM / 2) amount of memory. */
allocated += size;
if (allocated < KEEP_ROOM / 2)
goto theend;
allocated = 0;
# endif
/* 3. check for available memory: call mch_avail_mem() */
if (mch_avail_mem(TRUE) < KEEP_ROOM && !releasing)
{
free((char *)p); /* System is low... no go! */
p = NULL;
}
else
goto theend;
#endif
}
/*
* Remember that mf_release_all() is being called to avoid an endless
* loop, because mf_release_all() may call alloc() recursively.
*/
if (releasing)
break;
releasing = TRUE;
clear_sb_text(); /* free any scrollback text */
try_again = mf_release_all(); /* release as many blocks as possible */
#ifdef FEAT_EVAL
try_again |= garbage_collect(); /* cleanup recursive lists/dicts */
#endif
releasing = FALSE;
if (!try_again)
break;
}
if (message && p == NULL)
do_outofmem_msg(size);
theend:
#ifdef MEM_PROFILE
mem_post_alloc((void **)&p, (size_t)size);
#endif
return p;
}
#if defined(MEM_PROFILE) || defined(PROTO)
/*
* realloc() with memory profiling.
*/
void *
mem_realloc(ptr, size)
void *ptr;
size_t size;
{
void *p;
mem_pre_free(&ptr);
mem_pre_alloc_s(&size);
p = realloc(ptr, size);
mem_post_alloc(&p, size);
return p;
}