/
ops.c
7419 lines (6804 loc) · 180 KB
/
ops.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.
*/
/*
* ops.c: implementation of various operators: op_shift, op_delete, op_tilde,
* op_change, op_yank, do_put, do_join
*/
#include "vim.h"
/*
* Number of registers.
* 0 = unnamed register, for normal yanks and puts
* 1..9 = registers '1' to '9', for deletes
* 10..35 = registers 'a' to 'z'
* 36 = delete register '-'
* 37 = Selection register '*'. Only if FEAT_CLIPBOARD defined
* 38 = Clipboard register '+'. Only if FEAT_CLIPBOARD and FEAT_X11 defined
*/
/*
* Symbolic names for some registers.
*/
#define DELETION_REGISTER 36
#ifdef FEAT_CLIPBOARD
# define STAR_REGISTER 37
# ifdef FEAT_X11
# define PLUS_REGISTER 38
# else
# define PLUS_REGISTER STAR_REGISTER /* there is only one */
# endif
#endif
#ifdef FEAT_DND
# define TILDE_REGISTER (PLUS_REGISTER + 1)
#endif
#ifdef FEAT_CLIPBOARD
# ifdef FEAT_DND
# define NUM_REGISTERS (TILDE_REGISTER + 1)
# else
# define NUM_REGISTERS (PLUS_REGISTER + 1)
# endif
#else
# define NUM_REGISTERS 37
#endif
/*
* Each yank register has an array of pointers to lines.
*/
typedef struct
{
char_u **y_array; /* pointer to array of line pointers */
linenr_T y_size; /* number of lines in y_array */
char_u y_type; /* MLINE, MCHAR or MBLOCK */
colnr_T y_width; /* only set if y_type == MBLOCK */
#ifdef FEAT_VIMINFO
time_t y_time_set;
#endif
} yankreg_T;
static yankreg_T y_regs[NUM_REGISTERS];
static yankreg_T *y_current; /* ptr to current yankreg */
static int y_append; /* TRUE when appending */
static yankreg_T *y_previous = NULL; /* ptr to last written yankreg */
/*
* structure used by block_prep, op_delete and op_yank for blockwise operators
* also op_change, op_shift, op_insert, op_replace - AKelly
*/
struct block_def
{
int startspaces; /* 'extra' cols before first char */
int endspaces; /* 'extra' cols after last char */
int textlen; /* chars in block */
char_u *textstart; /* pointer to 1st char (partially) in block */
colnr_T textcol; /* index of chars (partially) in block */
colnr_T start_vcol; /* start col of 1st char wholly inside block */
colnr_T end_vcol; /* start col of 1st char wholly after block */
#ifdef FEAT_VISUALEXTRA
int is_short; /* TRUE if line is too short to fit in block */
int is_MAX; /* TRUE if curswant==MAXCOL when starting */
int is_oneChar; /* TRUE if block within one character */
int pre_whitesp; /* screen cols of ws before block */
int pre_whitesp_c; /* chars of ws before block */
colnr_T end_char_vcols; /* number of vcols of post-block char */
#endif
colnr_T start_char_vcols; /* number of vcols of pre-block char */
};
#ifdef FEAT_VISUALEXTRA
static void shift_block(oparg_T *oap, int amount);
static void block_insert(oparg_T *oap, char_u *s, int b_insert, struct block_def*bdp);
#endif
static int stuff_yank(int, char_u *);
static void put_reedit_in_typebuf(int silent);
static int put_in_typebuf(char_u *s, int esc, int colon,
int silent);
static void stuffescaped(char_u *arg, int literally);
#ifdef FEAT_MBYTE
static void mb_adjust_opend(oparg_T *oap);
#endif
static void free_yank(long);
static void free_yank_all(void);
static int yank_copy_line(struct block_def *bd, long y_idx);
#ifdef FEAT_CLIPBOARD
static void copy_yank_reg(yankreg_T *reg);
static void may_set_selection(void);
#endif
static void dis_msg(char_u *p, int skip_esc);
#if defined(FEAT_COMMENTS) || defined(PROTO)
static char_u *skip_comment(char_u *line, int process, int include_space, int *is_comment);
#endif
static void block_prep(oparg_T *oap, struct block_def *, linenr_T, int);
static int do_addsub(int op_type, pos_T *pos, int length, linenr_T Prenum1);
#if defined(FEAT_CLIPBOARD) || defined(FEAT_EVAL)
static void str_to_reg(yankreg_T *y_ptr, int yank_type, char_u *str, long len, long blocklen, int str_list);
#endif
static int ends_in_white(linenr_T lnum);
#ifdef FEAT_COMMENTS
static int same_leader(linenr_T lnum, int, char_u *, int, char_u *);
static int fmt_check_par(linenr_T, int *, char_u **, int do_comments);
#else
static int fmt_check_par(linenr_T);
#endif
/*
* The names of operators.
* IMPORTANT: Index must correspond with defines in vim.h!!!
* The third field indicates whether the operator always works on lines.
*/
static char opchars[][3] =
{
{NUL, NUL, FALSE}, /* OP_NOP */
{'d', NUL, FALSE}, /* OP_DELETE */
{'y', NUL, FALSE}, /* OP_YANK */
{'c', NUL, FALSE}, /* OP_CHANGE */
{'<', NUL, TRUE}, /* OP_LSHIFT */
{'>', NUL, TRUE}, /* OP_RSHIFT */
{'!', NUL, TRUE}, /* OP_FILTER */
{'g', '~', FALSE}, /* OP_TILDE */
{'=', NUL, TRUE}, /* OP_INDENT */
{'g', 'q', TRUE}, /* OP_FORMAT */
{':', NUL, TRUE}, /* OP_COLON */
{'g', 'U', FALSE}, /* OP_UPPER */
{'g', 'u', FALSE}, /* OP_LOWER */
{'J', NUL, TRUE}, /* DO_JOIN */
{'g', 'J', TRUE}, /* DO_JOIN_NS */
{'g', '?', FALSE}, /* OP_ROT13 */
{'r', NUL, FALSE}, /* OP_REPLACE */
{'I', NUL, FALSE}, /* OP_INSERT */
{'A', NUL, FALSE}, /* OP_APPEND */
{'z', 'f', TRUE}, /* OP_FOLD */
{'z', 'o', TRUE}, /* OP_FOLDOPEN */
{'z', 'O', TRUE}, /* OP_FOLDOPENREC */
{'z', 'c', TRUE}, /* OP_FOLDCLOSE */
{'z', 'C', TRUE}, /* OP_FOLDCLOSEREC */
{'z', 'd', TRUE}, /* OP_FOLDDEL */
{'z', 'D', TRUE}, /* OP_FOLDDELREC */
{'g', 'w', TRUE}, /* OP_FORMAT2 */
{'g', '@', FALSE}, /* OP_FUNCTION */
{Ctrl_A, NUL, FALSE}, /* OP_NR_ADD */
{Ctrl_X, NUL, FALSE}, /* OP_NR_SUB */
};
/*
* Translate a command name into an operator type.
* Must only be called with a valid operator name!
*/
int
get_op_type(int char1, int char2)
{
int i;
if (char1 == 'r') /* ignore second character */
return OP_REPLACE;
if (char1 == '~') /* when tilde is an operator */
return OP_TILDE;
if (char1 == 'g' && char2 == Ctrl_A) /* add */
return OP_NR_ADD;
if (char1 == 'g' && char2 == Ctrl_X) /* subtract */
return OP_NR_SUB;
for (i = 0; ; ++i)
if (opchars[i][0] == char1 && opchars[i][1] == char2)
break;
return i;
}
/*
* Return TRUE if operator "op" always works on whole lines.
*/
int
op_on_lines(int op)
{
return opchars[op][2];
}
/*
* Get first operator command character.
* Returns 'g' or 'z' if there is another command character.
*/
int
get_op_char(int optype)
{
return opchars[optype][0];
}
/*
* Get second operator command character.
*/
int
get_extra_op_char(int optype)
{
return opchars[optype][1];
}
/*
* op_shift - handle a shift operation
*/
void
op_shift(oparg_T *oap, int curs_top, int amount)
{
long i;
int first_char;
char_u *s;
int block_col = 0;
if (u_save((linenr_T)(oap->start.lnum - 1),
(linenr_T)(oap->end.lnum + 1)) == FAIL)
return;
if (oap->block_mode)
block_col = curwin->w_cursor.col;
for (i = oap->line_count; --i >= 0; )
{
first_char = *ml_get_curline();
if (first_char == NUL) /* empty line */
curwin->w_cursor.col = 0;
#ifdef FEAT_VISUALEXTRA
else if (oap->block_mode)
shift_block(oap, amount);
#endif
else
/* Move the line right if it doesn't start with '#', 'smartindent'
* isn't set or 'cindent' isn't set or '#' isn't in 'cino'. */
#if defined(FEAT_SMARTINDENT) || defined(FEAT_CINDENT)
if (first_char != '#' || !preprocs_left())
#endif
{
shift_line(oap->op_type == OP_LSHIFT, p_sr, amount, FALSE);
}
++curwin->w_cursor.lnum;
}
changed_lines(oap->start.lnum, 0, oap->end.lnum + 1, 0L);
#ifdef FEAT_FOLDING
/* The cursor line is not in a closed fold */
foldOpenCursor();
#endif
if (oap->block_mode)
{
curwin->w_cursor.lnum = oap->start.lnum;
curwin->w_cursor.col = block_col;
}
else if (curs_top) /* put cursor on first line, for ">>" */
{
curwin->w_cursor.lnum = oap->start.lnum;
beginline(BL_SOL | BL_FIX); /* shift_line() may have set cursor.col */
}
else
--curwin->w_cursor.lnum; /* put cursor on last line, for ":>" */
if (oap->line_count > p_report)
{
if (oap->op_type == OP_RSHIFT)
s = (char_u *)">";
else
s = (char_u *)"<";
if (oap->line_count == 1)
{
if (amount == 1)
sprintf((char *)IObuff, _("1 line %sed 1 time"), s);
else
sprintf((char *)IObuff, _("1 line %sed %d times"), s, amount);
}
else
{
if (amount == 1)
sprintf((char *)IObuff, _("%ld lines %sed 1 time"),
oap->line_count, s);
else
sprintf((char *)IObuff, _("%ld lines %sed %d times"),
oap->line_count, s, amount);
}
msg(IObuff);
}
/*
* Set "'[" and "']" marks.
*/
curbuf->b_op_start = oap->start;
curbuf->b_op_end.lnum = oap->end.lnum;
curbuf->b_op_end.col = (colnr_T)STRLEN(ml_get(oap->end.lnum));
if (curbuf->b_op_end.col > 0)
--curbuf->b_op_end.col;
}
/*
* shift the current line one shiftwidth left (if left != 0) or right
* leaves cursor on first blank in the line
*/
void
shift_line(
int left,
int round,
int amount,
int call_changed_bytes) /* call changed_bytes() */
{
int count;
int i, j;
int p_sw = (int)get_sw_value(curbuf);
count = get_indent(); /* get current indent */
if (round) /* round off indent */
{
i = count / p_sw; /* number of p_sw rounded down */
j = count % p_sw; /* extra spaces */
if (j && left) /* first remove extra spaces */
--amount;
if (left)
{
i -= amount;
if (i < 0)
i = 0;
}
else
i += amount;
count = i * p_sw;
}
else /* original vi indent */
{
if (left)
{
count -= p_sw * amount;
if (count < 0)
count = 0;
}
else
count += p_sw * amount;
}
/* Set new indent */
#ifdef FEAT_VREPLACE
if (State & VREPLACE_FLAG)
change_indent(INDENT_SET, count, FALSE, NUL, call_changed_bytes);
else
#endif
(void)set_indent(count, call_changed_bytes ? SIN_CHANGED : 0);
}
#if defined(FEAT_VISUALEXTRA) || defined(PROTO)
/*
* Shift one line of the current block one shiftwidth right or left.
* Leaves cursor on first character in block.
*/
static void
shift_block(oparg_T *oap, int amount)
{
int left = (oap->op_type == OP_LSHIFT);
int oldstate = State;
int total;
char_u *newp, *oldp;
int oldcol = curwin->w_cursor.col;
int p_sw = (int)get_sw_value(curbuf);
int p_ts = (int)curbuf->b_p_ts;
struct block_def bd;
int incr;
colnr_T ws_vcol;
int i = 0, j = 0;
int len;
#ifdef FEAT_RIGHTLEFT
int old_p_ri = p_ri;
p_ri = 0; /* don't want revins in indent */
#endif
State = INSERT; /* don't want REPLACE for State */
block_prep(oap, &bd, curwin->w_cursor.lnum, TRUE);
if (bd.is_short)
return;
/* total is number of screen columns to be inserted/removed */
total = amount * p_sw;
oldp = ml_get_curline();
if (!left)
{
/*
* 1. Get start vcol
* 2. Total ws vcols
* 3. Divvy into TABs & spp
* 4. Construct new string
*/
total += bd.pre_whitesp; /* all virtual WS upto & incl a split TAB */
ws_vcol = bd.start_vcol - bd.pre_whitesp;
if (bd.startspaces)
{
#ifdef FEAT_MBYTE
if (has_mbyte)
{
if ((*mb_ptr2len)(bd.textstart) == 1)
++bd.textstart;
else
{
ws_vcol = 0;
bd.startspaces = 0;
}
}
else
#endif
++bd.textstart;
}
for ( ; vim_iswhite(*bd.textstart); )
{
/* TODO: is passing bd.textstart for start of the line OK? */
incr = lbr_chartabsize_adv(bd.textstart, &bd.textstart,
(colnr_T)(bd.start_vcol));
total += incr;
bd.start_vcol += incr;
}
/* OK, now total=all the VWS reqd, and textstart points at the 1st
* non-ws char in the block. */
if (!curbuf->b_p_et)
i = ((ws_vcol % p_ts) + total) / p_ts; /* number of tabs */
if (i)
j = ((ws_vcol % p_ts) + total) % p_ts; /* number of spp */
else
j = total;
/* if we're splitting a TAB, allow for it */
bd.textcol -= bd.pre_whitesp_c - (bd.startspaces != 0);
len = (int)STRLEN(bd.textstart) + 1;
newp = alloc_check((unsigned)(bd.textcol + i + j + len));
if (newp == NULL)
return;
vim_memset(newp, NUL, (size_t)(bd.textcol + i + j + len));
mch_memmove(newp, oldp, (size_t)bd.textcol);
vim_memset(newp + bd.textcol, TAB, (size_t)i);
vim_memset(newp + bd.textcol + i, ' ', (size_t)j);
/* the end */
mch_memmove(newp + bd.textcol + i + j, bd.textstart, (size_t)len);
}
else /* left */
{
colnr_T destination_col; /* column to which text in block will
be shifted */
char_u *verbatim_copy_end; /* end of the part of the line which is
copied verbatim */
colnr_T verbatim_copy_width;/* the (displayed) width of this part
of line */
unsigned fill; /* nr of spaces that replace a TAB */
unsigned new_line_len; /* the length of the line after the
block shift */
size_t block_space_width;
size_t shift_amount;
char_u *non_white = bd.textstart;
colnr_T non_white_col;
/*
* Firstly, let's find the first non-whitespace character that is
* displayed after the block's start column and the character's column
* number. Also, let's calculate the width of all the whitespace
* characters that are displayed in the block and precede the searched
* non-whitespace character.
*/
/* If "bd.startspaces" is set, "bd.textstart" points to the character,
* the part of which is displayed at the block's beginning. Let's start
* searching from the next character. */
if (bd.startspaces)
mb_ptr_adv(non_white);
/* The character's column is in "bd.start_vcol". */
non_white_col = bd.start_vcol;
while (vim_iswhite(*non_white))
{
incr = lbr_chartabsize_adv(bd.textstart, &non_white, non_white_col);
non_white_col += incr;
}
block_space_width = non_white_col - oap->start_vcol;
/* We will shift by "total" or "block_space_width", whichever is less.
*/
shift_amount = (block_space_width < (size_t)total
? block_space_width : (size_t)total);
/* The column to which we will shift the text. */
destination_col = (colnr_T)(non_white_col - shift_amount);
/* Now let's find out how much of the beginning of the line we can
* reuse without modification. */
verbatim_copy_end = bd.textstart;
verbatim_copy_width = bd.start_vcol;
/* If "bd.startspaces" is set, "bd.textstart" points to the character
* preceding the block. We have to subtract its width to obtain its
* column number. */
if (bd.startspaces)
verbatim_copy_width -= bd.start_char_vcols;
while (verbatim_copy_width < destination_col)
{
char_u *line = verbatim_copy_end;
/* TODO: is passing verbatim_copy_end for start of the line OK? */
incr = lbr_chartabsize(line, verbatim_copy_end,
verbatim_copy_width);
if (verbatim_copy_width + incr > destination_col)
break;
verbatim_copy_width += incr;
mb_ptr_adv(verbatim_copy_end);
}
/* If "destination_col" is different from the width of the initial
* part of the line that will be copied, it means we encountered a tab
* character, which we will have to partly replace with spaces. */
fill = destination_col - verbatim_copy_width;
/* The replacement line will consist of:
* - the beginning of the original line up to "verbatim_copy_end",
* - "fill" number of spaces,
* - the rest of the line, pointed to by non_white. */
new_line_len = (unsigned)(verbatim_copy_end - oldp)
+ fill
+ (unsigned)STRLEN(non_white) + 1;
newp = alloc_check(new_line_len);
if (newp == NULL)
return;
mch_memmove(newp, oldp, (size_t)(verbatim_copy_end - oldp));
vim_memset(newp + (verbatim_copy_end - oldp), ' ', (size_t)fill);
STRMOVE(newp + (verbatim_copy_end - oldp) + fill, non_white);
}
/* replace the line */
ml_replace(curwin->w_cursor.lnum, newp, FALSE);
changed_bytes(curwin->w_cursor.lnum, (colnr_T)bd.textcol);
State = oldstate;
curwin->w_cursor.col = oldcol;
#ifdef FEAT_RIGHTLEFT
p_ri = old_p_ri;
#endif
}
#endif
#ifdef FEAT_VISUALEXTRA
/*
* Insert string "s" (b_insert ? before : after) block :AKelly
* Caller must prepare for undo.
*/
static void
block_insert(
oparg_T *oap,
char_u *s,
int b_insert,
struct block_def *bdp)
{
int p_ts;
int count = 0; /* extra spaces to replace a cut TAB */
int spaces = 0; /* non-zero if cutting a TAB */
colnr_T offset; /* pointer along new line */
unsigned s_len; /* STRLEN(s) */
char_u *newp, *oldp; /* new, old lines */
linenr_T lnum; /* loop var */
int oldstate = State;
State = INSERT; /* don't want REPLACE for State */
s_len = (unsigned)STRLEN(s);
for (lnum = oap->start.lnum + 1; lnum <= oap->end.lnum; lnum++)
{
block_prep(oap, bdp, lnum, TRUE);
if (bdp->is_short && b_insert)
continue; /* OP_INSERT, line ends before block start */
oldp = ml_get(lnum);
if (b_insert)
{
p_ts = bdp->start_char_vcols;
spaces = bdp->startspaces;
if (spaces != 0)
count = p_ts - 1; /* we're cutting a TAB */
offset = bdp->textcol;
}
else /* append */
{
p_ts = bdp->end_char_vcols;
if (!bdp->is_short) /* spaces = padding after block */
{
spaces = (bdp->endspaces ? p_ts - bdp->endspaces : 0);
if (spaces != 0)
count = p_ts - 1; /* we're cutting a TAB */
offset = bdp->textcol + bdp->textlen - (spaces != 0);
}
else /* spaces = padding to block edge */
{
/* if $ used, just append to EOL (ie spaces==0) */
if (!bdp->is_MAX)
spaces = (oap->end_vcol - bdp->end_vcol) + 1;
count = spaces;
offset = bdp->textcol + bdp->textlen;
}
}
#ifdef FEAT_MBYTE
if (has_mbyte && spaces > 0)
{
int off;
/* Avoid starting halfway a multi-byte character. */
if (b_insert)
{
off = (*mb_head_off)(oldp, oldp + offset + spaces);
}
else
{
off = (*mb_off_next)(oldp, oldp + offset);
offset += off;
}
spaces -= off;
count -= off;
}
#endif
newp = alloc_check((unsigned)(STRLEN(oldp)) + s_len + count + 1);
if (newp == NULL)
continue;
/* copy up to shifted part */
mch_memmove(newp, oldp, (size_t)(offset));
oldp += offset;
/* insert pre-padding */
vim_memset(newp + offset, ' ', (size_t)spaces);
/* copy the new text */
mch_memmove(newp + offset + spaces, s, (size_t)s_len);
offset += s_len;
if (spaces && !bdp->is_short)
{
/* insert post-padding */
vim_memset(newp + offset + spaces, ' ', (size_t)(p_ts - spaces));
/* We're splitting a TAB, don't copy it. */
oldp++;
/* We allowed for that TAB, remember this now */
count++;
}
if (spaces > 0)
offset += count;
STRMOVE(newp + offset, oldp);
ml_replace(lnum, newp, FALSE);
if (lnum == oap->end.lnum)
{
/* Set "']" mark to the end of the block instead of the end of
* the insert in the first line. */
curbuf->b_op_end.lnum = oap->end.lnum;
curbuf->b_op_end.col = offset;
}
} /* for all lnum */
changed_lines(oap->start.lnum + 1, 0, oap->end.lnum + 1, 0L);
State = oldstate;
}
#endif
#if defined(FEAT_LISP) || defined(FEAT_CINDENT) || defined(PROTO)
/*
* op_reindent - handle reindenting a block of lines.
*/
void
op_reindent(oparg_T *oap, int (*how)(void))
{
long i;
char_u *l;
int amount;
linenr_T first_changed = 0;
linenr_T last_changed = 0;
linenr_T start_lnum = curwin->w_cursor.lnum;
/* Don't even try when 'modifiable' is off. */
if (!curbuf->b_p_ma)
{
EMSG(_(e_modifiable));
return;
}
for (i = oap->line_count; --i >= 0 && !got_int; )
{
/* it's a slow thing to do, so give feedback so there's no worry that
* the computer's just hung. */
if (i > 1
&& (i % 50 == 0 || i == oap->line_count - 1)
&& oap->line_count > p_report)
smsg((char_u *)_("%ld lines to indent... "), i);
/*
* Be vi-compatible: For lisp indenting the first line is not
* indented, unless there is only one line.
*/
#ifdef FEAT_LISP
if (i != oap->line_count - 1 || oap->line_count == 1
|| how != get_lisp_indent)
#endif
{
l = skipwhite(ml_get_curline());
if (*l == NUL) /* empty or blank line */
amount = 0;
else
amount = how(); /* get the indent for this line */
if (amount >= 0 && set_indent(amount, SIN_UNDO))
{
/* did change the indent, call changed_lines() later */
if (first_changed == 0)
first_changed = curwin->w_cursor.lnum;
last_changed = curwin->w_cursor.lnum;
}
}
++curwin->w_cursor.lnum;
curwin->w_cursor.col = 0; /* make sure it's valid */
}
/* put cursor on first non-blank of indented line */
curwin->w_cursor.lnum = start_lnum;
beginline(BL_SOL | BL_FIX);
/* Mark changed lines so that they will be redrawn. When Visual
* highlighting was present, need to continue until the last line. When
* there is no change still need to remove the Visual highlighting. */
if (last_changed != 0)
changed_lines(first_changed, 0,
oap->is_VIsual ? start_lnum + oap->line_count :
last_changed + 1, 0L);
else if (oap->is_VIsual)
redraw_curbuf_later(INVERTED);
if (oap->line_count > p_report)
{
i = oap->line_count - (i + 1);
if (i == 1)
MSG(_("1 line indented "));
else
smsg((char_u *)_("%ld lines indented "), i);
}
/* set '[ and '] marks */
curbuf->b_op_start = oap->start;
curbuf->b_op_end = oap->end;
}
#endif /* defined(FEAT_LISP) || defined(FEAT_CINDENT) */
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* Keep the last expression line here, for repeating.
*/
static char_u *expr_line = NULL;
/*
* Get an expression for the "\"=expr1" or "CTRL-R =expr1"
* Returns '=' when OK, NUL otherwise.
*/
int
get_expr_register(void)
{
char_u *new_line;
new_line = getcmdline('=', 0L, 0);
if (new_line == NULL)
return NUL;
if (*new_line == NUL) /* use previous line */
vim_free(new_line);
else
set_expr_line(new_line);
return '=';
}
/*
* Set the expression for the '=' register.
* Argument must be an allocated string.
*/
void
set_expr_line(char_u *new_line)
{
vim_free(expr_line);
expr_line = new_line;
}
/*
* Get the result of the '=' register expression.
* Returns a pointer to allocated memory, or NULL for failure.
*/
char_u *
get_expr_line(void)
{
char_u *expr_copy;
char_u *rv;
static int nested = 0;
if (expr_line == NULL)
return NULL;
/* Make a copy of the expression, because evaluating it may cause it to be
* changed. */
expr_copy = vim_strsave(expr_line);
if (expr_copy == NULL)
return NULL;
/* When we are invoked recursively limit the evaluation to 10 levels.
* Then return the string as-is. */
if (nested >= 10)
return expr_copy;
++nested;
rv = eval_to_string(expr_copy, NULL, TRUE);
--nested;
vim_free(expr_copy);
return rv;
}
/*
* Get the '=' register expression itself, without evaluating it.
*/
char_u *
get_expr_line_src(void)
{
if (expr_line == NULL)
return NULL;
return vim_strsave(expr_line);
}
#endif /* FEAT_EVAL */
/*
* Check if 'regname' is a valid name of a yank register.
* Note: There is no check for 0 (default register), caller should do this
*/
int
valid_yank_reg(
int regname,
int writing) /* if TRUE check for writable registers */
{
if ( (regname > 0 && ASCII_ISALNUM(regname))
|| (!writing && vim_strchr((char_u *)
#ifdef FEAT_EVAL
"/.%:="
#else
"/.%:"
#endif
, regname) != NULL)
|| regname == '#'
|| regname == '"'
|| regname == '-'
|| regname == '_'
#ifdef FEAT_CLIPBOARD
|| regname == '*'
|| regname == '+'
#endif
#ifdef FEAT_DND
|| (!writing && regname == '~')
#endif
)
return TRUE;
return FALSE;
}
/*
* Set y_current and y_append, according to the value of "regname".
* Cannot handle the '_' register.
* Must only be called with a valid register name!
*
* If regname is 0 and writing, use register 0
* If regname is 0 and reading, use previous register
*/
void
get_yank_register(int regname, int writing)
{
int i;
y_append = FALSE;
if ((regname == 0 || regname == '"') && !writing && y_previous != NULL)
{
y_current = y_previous;
return;
}
i = regname;
if (VIM_ISDIGIT(i))
i -= '0';
else if (ASCII_ISLOWER(i))
i = CharOrdLow(i) + 10;
else if (ASCII_ISUPPER(i))
{
i = CharOrdUp(i) + 10;
y_append = TRUE;
}
else if (regname == '-')
i = DELETION_REGISTER;
#ifdef FEAT_CLIPBOARD
/* When selection is not available, use register 0 instead of '*' */
else if (clip_star.available && regname == '*')
i = STAR_REGISTER;
/* When clipboard is not available, use register 0 instead of '+' */
else if (clip_plus.available && regname == '+')
i = PLUS_REGISTER;
#endif
#ifdef FEAT_DND
else if (!writing && regname == '~')
i = TILDE_REGISTER;
#endif
else /* not 0-9, a-z, A-Z or '-': use register 0 */
i = 0;
y_current = &(y_regs[i]);
if (writing) /* remember the register we write into for do_put() */
y_previous = y_current;
}
#if defined(FEAT_CLIPBOARD) || defined(PROTO)
/*
* When "regname" is a clipboard register, obtain the selection. If it's not
* available return zero, otherwise return "regname".
*/
int
may_get_selection(int regname)
{
if (regname == '*')
{
if (!clip_star.available)
regname = 0;
else
clip_get_selection(&clip_star);
}
else if (regname == '+')
{
if (!clip_plus.available)
regname = 0;
else
clip_get_selection(&clip_plus);
}
return regname;
}
#endif
/*
* Obtain the contents of a "normal" register. The register is made empty.
* The returned pointer has allocated memory, use put_register() later.
*/
void *
get_register(
int name,
int copy) /* make a copy, if FALSE make register empty. */
{
yankreg_T *reg;
int i;
#ifdef FEAT_CLIPBOARD
/* When Visual area changed, may have to update selection. Obtain the
* selection too. */
if (name == '*' && clip_star.available)
{
if (clip_isautosel_star())
clip_update_selection(&clip_star);
may_get_selection(name);
}
if (name == '+' && clip_plus.available)
{
if (clip_isautosel_plus())
clip_update_selection(&clip_plus);
may_get_selection(name);
}
#endif
get_yank_register(name, 0);
reg = (yankreg_T *)alloc((unsigned)sizeof(yankreg_T));
if (reg != NULL)
{
*reg = *y_current;
if (copy)
{
/* If we run out of memory some or all of the lines are empty. */
if (reg->y_size == 0)