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ops.c
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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 is an array of pointers to lines.
*/
static struct yankreg
{
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 */
#ifdef FEAT_VISUAL
colnr_T y_width; /* only set if y_type == MBLOCK */
#endif
} y_regs[NUM_REGISTERS];
static struct yankreg *y_current; /* ptr to current yankreg */
static int y_append; /* TRUE when appending */
static struct yankreg *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 of first char */
int endspaces; /* 'extra' cols of first char */
int textlen; /* chars in block */
char_u *textstart; /* pointer to 1st char in block */
colnr_T textcol; /* cols of chars (at least part.) 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 __ARGS((oparg_T *oap, int amount));
static void block_insert __ARGS((oparg_T *oap, char_u *s, int b_insert, struct block_def*bdp));
#endif
static int stuff_yank __ARGS((int, char_u *));
static void put_reedit_in_typebuf __ARGS((int silent));
static int put_in_typebuf __ARGS((char_u *s, int esc, int colon,
int silent));
static void stuffescaped __ARGS((char_u *arg, int literally));
#ifdef FEAT_MBYTE
static void mb_adjust_opend __ARGS((oparg_T *oap));
#endif
static void free_yank __ARGS((long));
static void free_yank_all __ARGS((void));
static int yank_copy_line __ARGS((struct block_def *bd, long y_idx));
#ifdef FEAT_CLIPBOARD
static void copy_yank_reg __ARGS((struct yankreg *reg));
# if defined(FEAT_VISUAL) || defined(FEAT_EVAL)
static void may_set_selection __ARGS((void));
# endif
#endif
static void dis_msg __ARGS((char_u *p, int skip_esc));
#ifdef FEAT_VISUAL
static void block_prep __ARGS((oparg_T *oap, struct block_def *, linenr_T, int));
#endif
#if defined(FEAT_CLIPBOARD) || defined(FEAT_EVAL)
static void str_to_reg __ARGS((struct yankreg *y_ptr, int type, char_u *str, long len, long blocklen));
#endif
static int ends_in_white __ARGS((linenr_T lnum));
#ifdef FEAT_COMMENTS
static int same_leader __ARGS((linenr_T lnum, int, char_u *, int, char_u *));
static int fmt_check_par __ARGS((linenr_T, int *, char_u **, int do_comments));
#else
static int fmt_check_par __ARGS((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 */
};
/*
* Translate a command name into an operator type.
* Must only be called with a valid operator name!
*/
int
get_op_type(char1, char2)
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;
for (i = 0; ; ++i)
if (opchars[i][0] == char1 && opchars[i][1] == char2)
break;
return i;
}
#if defined(FEAT_VISUAL) || defined(PROTO)
/*
* Return TRUE if operator "op" always works on whole lines.
*/
int
op_on_lines(op)
int op;
{
return opchars[op][2];
}
#endif
/*
* Get first operator command character.
* Returns 'g' or 'z' if there is another command character.
*/
int
get_op_char(optype)
int optype;
{
return opchars[optype][0];
}
/*
* Get second operator command character.
*/
int
get_extra_op_char(optype)
int optype;
{
return opchars[optype][1];
}
/*
* op_shift - handle a shift operation
*/
void
op_shift(oap, curs_top, amount)
oparg_T *oap;
int curs_top;
int amount;
{
long i;
int first_char;
char_u *s;
#ifdef FEAT_VISUAL
int block_col = 0;
#endif
if (u_save((linenr_T)(oap->start.lnum - 1),
(linenr_T)(oap->end.lnum + 1)) == FAIL)
return;
#ifdef FEAT_VISUAL
if (oap->block_mode)
block_col = curwin->w_cursor.col;
#endif
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_VISUAL
if (oap->block_mode)
{
curwin->w_cursor.lnum = oap->start.lnum;
curwin->w_cursor.col = block_col;
}
else
#endif
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(left, round, amount, call_changed_bytes)
int left;
int round;
int amount;
int call_changed_bytes; /* call changed_bytes() */
{
int count;
int i, j;
int p_sw = (int)curbuf->b_p_sw;
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(oap, amount)
oparg_T *oap;
int amount;
{
int left = (oap->op_type == OP_LSHIFT);
int oldstate = State;
int total, split;
char_u *newp, *oldp, *midp, *ptr;
int oldcol = curwin->w_cursor.col;
int p_sw = (int)curbuf->b_p_sw;
int p_ts = (int)curbuf->b_p_ts;
struct block_def bd;
int internal = 0;
int incr;
colnr_T vcol, col = 0, 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 ident */
#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)
bd.textstart += (*mb_ptr2len)(bd.textstart);
#endif
++bd.textstart;
}
for ( ; vim_iswhite(*bd.textstart); )
{
incr = lbr_chartabsize_adv(&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);
copy_chars(newp + bd.textcol, (size_t)i, TAB);
copy_spaces(newp + bd.textcol + i, (size_t)j);
/* the end */
mch_memmove(newp + bd.textcol + i + j, bd.textstart, (size_t)len);
}
else /* left */
{
vcol = oap->start_vcol;
/* walk vcol past ws to be removed */
for (midp = oldp + bd.textcol;
vcol < (oap->start_vcol + total) && vim_iswhite(*midp); )
{
incr = lbr_chartabsize_adv(&midp, (colnr_T)vcol);
vcol += incr;
}
/* internal is the block-internal ws replacing a split TAB */
if (vcol > (oap->start_vcol + total))
{
/* we have to split the TAB *(midp-1) */
internal = vcol - (oap->start_vcol + total);
}
/* if 'expandtab' is not set, use TABs */
split = bd.startspaces + internal;
if (split > 0)
{
if (!curbuf->b_p_et)
{
for (ptr = oldp, col = 0; ptr < oldp+bd.textcol; )
col += lbr_chartabsize_adv(&ptr, (colnr_T)col);
/* col+1 now equals the start col of the first char of the
* block (may be < oap.start_vcol if we're splitting a TAB) */
i = ((col % p_ts) + split) / p_ts; /* number of tabs */
}
if (i)
j = ((col % p_ts) + split) % p_ts; /* number of spp */
else
j = split;
}
newp = alloc_check(bd.textcol + i + j + (unsigned)STRLEN(midp) + 1);
if (newp == NULL)
return;
vim_memset(newp, NUL, (size_t)(bd.textcol + i + j + STRLEN(midp) + 1));
/* copy first part we want to keep */
mch_memmove(newp, oldp, (size_t)bd.textcol);
/* Now copy any TABS and spp to ensure correct alignment! */
while (vim_iswhite(*midp))
{
if (*midp == TAB)
i++;
else /*space */
j++;
midp++;
}
/* We might have an extra TAB worth of spp now! */
if (j / p_ts && !curbuf->b_p_et)
{
i++;
j -= p_ts;
}
copy_chars(newp + bd.textcol, (size_t)i, TAB);
copy_spaces(newp + bd.textcol + i, (size_t)j);
/* the end */
STRMOVE(newp + STRLEN(newp), midp);
}
/* 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(oap, s, b_insert, bdp)
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;
}
}
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 */
copy_spaces(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 */
copy_spaces(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(oap, how)
oparg_T *oap;
int (*how) __ARGS((void));
{
long i;
char_u *l;
int count;
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 */
count = 0;
else
count = how(); /* get the indent for this line */
if (set_indent(count, 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,
#ifdef FEAT_VISUAL
oap->is_VIsual ? start_lnum + oap->line_count :
#endif
last_changed + 1, 0L);
#ifdef FEAT_VISUAL
else if (oap->is_VIsual)
redraw_curbuf_later(INVERTED);
#endif
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()
{
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(new_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()
{
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()
{
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(regname, writing)
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 == '_'
#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(regname, writing)
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(regname)
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
#if defined(FEAT_VISUAL) || defined(PROTO)
/*
* 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(name, copy)
int name;
int copy; /* make a copy, if FALSE make register empty. */
{
struct yankreg *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())
clip_update_selection();
may_get_selection(name);
}
#endif
get_yank_register(name, 0);
reg = (struct yankreg *)alloc((unsigned)sizeof(struct yankreg));
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)
reg->y_array = NULL;
else
reg->y_array = (char_u **)alloc((unsigned)(sizeof(char_u *)
* reg->y_size));
if (reg->y_array != NULL)
{
for (i = 0; i < reg->y_size; ++i)
reg->y_array[i] = vim_strsave(y_current->y_array[i]);
}
}
else
y_current->y_array = NULL;
}
return (void *)reg;
}
/*
* Put "reg" into register "name". Free any previous contents and "reg".
*/
void
put_register(name, reg)
int name;
void *reg;
{
get_yank_register(name, 0);
free_yank_all();
*y_current = *(struct yankreg *)reg;
vim_free(reg);
# ifdef FEAT_CLIPBOARD
/* Send text written to clipboard register to the clipboard. */
may_set_selection();
# endif
}
#endif
#if defined(FEAT_MOUSE) || defined(PROTO)
/*
* return TRUE if the current yank register has type MLINE
*/
int
yank_register_mline(regname)
int regname;
{
if (regname != 0 && !valid_yank_reg(regname, FALSE))
return FALSE;