/*
* v_up -- [count]^P, [count]k, [count]-
* Move up by lines.
*
* PUBLIC: int v_up(SCR *, VICMD *);
*/
int
v_up(SCR *sp, VICMD *vp)
{
recno_t lno;
lno = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
if (vp->m_start.lno <= lno) {
v_sof(sp, &vp->m_start);
return (1);
}
vp->m_stop.lno = vp->m_start.lno - lno;
vp->m_final = vp->m_stop;
return (0);
}
/*
* bword --
* Move backward by words.
*/
static int
bword(SCR *sp, VICMD *vp, enum which type)
{
enum { INWORD, NOTWORD } state;
VCS cs;
u_long cnt;
int nmw, omw;
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
cs.cs_lno = vp->m_start.lno;
cs.cs_cno = vp->m_start.cno;
if (cs_init(sp, &cs))
return (1);
/*
* !!!
* If in whitespace, or the previous character is whitespace, move
* past it. (This doesn't count as a word move.) Stay at the
* character before the current one, it sets word "state" for the
* 'b' command.
*/
if (cs.cs_flags == 0 && !ISBLANK2(cs.cs_ch)) {
if (cs_prev(sp, &cs))
return (1);
if (cs.cs_flags == 0 && !ISBLANK2(cs.cs_ch))
goto start;
}
if (cs_bblank(sp, &cs))
return (1);
/*
* Cyclically move to the beginning of the previous word -- this
* involves skipping over word characters and then any trailing
* non-word characters. Note, for the 'b' command, the definition
* of a word keeps switching.
*/
start: if (type == BIGWORD)
while (cnt--) {
nmw = ISMULTIWIDTH(sp, cs.cs_ch);
for (;;) {
omw = nmw;
if (cs_prev(sp, &cs))
return (1);
if (cs.cs_flags == CS_SOF)
goto ret;
if (cs.cs_flags != 0 || ISBLANK2(cs.cs_ch) ||
(nmw = ISMULTIWIDTH(sp, cs.cs_ch)) != omw)
break;
}
/*
* When we reach the end of the word before the last
* word, we're done. If we changed state, move forward
* one to the end of the next word.
*/
if (cnt == 0) {
if (cs.cs_flags == 0 && cs_next(sp, &cs))
return (1);
break;
}
/* Eat whitespace characters. */
if (nmw == omw && cs_bblank(sp, &cs))
return (1);
if (cs.cs_flags == CS_SOF)
goto ret;
}
else
while (cnt--) {
state = cs.cs_flags == 0 &&
inword(cs.cs_ch) ? INWORD : NOTWORD;
nmw = ISMULTIWIDTH(sp, cs.cs_ch);
for (;;) {
omw = nmw;
if (cs_prev(sp, &cs))
return (1);
if (cs.cs_flags == CS_SOF)
goto ret;
if (cs.cs_flags != 0 || ISBLANK2(cs.cs_ch) ||
(nmw = ISMULTIWIDTH(sp, cs.cs_ch)) != omw)
break;
if (state == INWORD) {
if (!inword(cs.cs_ch))
break;
} else
if (inword(cs.cs_ch))
break;
}
/* See comment above. */
if (cnt == 0) {
if (cs.cs_flags == 0 && cs_next(sp, &cs))
return (1);
break;
}
/* Eat whitespace characters. */
if (cs.cs_flags != 0 || ISBLANK2(cs.cs_ch))
if (cs_bblank(sp, &cs))
return (1);
if (cs.cs_flags == CS_SOF)
goto ret;
}
/* If we didn't move, we must be at SOF. */
ret: if (cs.cs_lno == vp->m_start.lno && cs.cs_cno == vp->m_start.cno) {
v_sof(sp, &vp->m_start);
return (1);
}
/* Set the end of the range for motion commands. */
vp->m_stop.lno = cs.cs_lno;
vp->m_stop.cno = cs.cs_cno;
/*
* All commands move to the end of the range. Motion commands
* adjust the starting point to the character before the current
* one.
*
* !!!
* The historic vi didn't get this right -- the `yb' command yanked
* the right stuff and even updated the cursor value, but the cursor
* was not actually updated on the screen.
*/
vp->m_final = vp->m_stop;
if (ISMOTION(vp))
--vp->m_start.cno;
return (0);
}
/*
* v_sectionb -- [count][[
* Move backward count sections/functions.
*
* PUBLIC: int v_sectionb(SCR *, VICMD *);
*/
int
v_sectionb(SCR *sp, VICMD *vp)
{
size_t len;
recno_t cnt, lno;
CHAR_T *p;
char *list, *lp;
/* An empty file or starting from line 1 is always illegal. */
if (vp->m_start.lno <= 1) {
v_sof(sp, NULL);
return (1);
}
/* Get the macro list. */
if ((list = O_STR(sp, O_SECTIONS)) == NULL)
return (1);
cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
for (lno = vp->m_start.lno; !db_get(sp, --lno, 0, &p, &len);) {
if (len == 0)
continue;
if (p[0] == '{') {
if (!--cnt)
goto adjust1;
continue;
}
/*
* !!!
* Historic documentation (USD:15-11, 4.2) said that formfeed
* characters (^L) in the first column delimited sections.
* The historic code mentions formfeed characters, but never
* implements them. Seems reasonable, do it.
*/
if (p[0] == '\014') {
if (!--cnt)
goto adjust1;
continue;
}
if (p[0] != '.' || len < 2)
continue;
for (lp = list; *lp != '\0'; lp += 2 * sizeof(*lp))
if (lp[0] == p[1] &&
((lp[1] == ' ' && len == 2) || lp[1] == p[2]) &&
!--cnt) {
adjust1: vp->m_stop.lno = lno;
vp->m_stop.cno = 0;
goto ret1;
}
}
/*
* If moving backward, reached SOF, which is a movement sink.
* We already checked for starting there.
*/
vp->m_stop.lno = 1;
vp->m_stop.cno = 0;
/*
* All commands move to the end of the range.
*
* !!!
* Historic practice is the section cut was in line mode if it started
* from column 0 and was in the backward direction. Otherwise, left
* motion commands adjust the starting point to the character before
* the current one. What makes this worse is that if it cut to line
* mode it also went to the first non-<blank>.
*/
ret1: if (vp->m_start.cno == 0) {
F_CLR(vp, VM_RCM_MASK);
F_SET(vp, VM_RCM_SETFNB);
--vp->m_start.lno;
F_SET(vp, VM_LMODE);
} else
--vp->m_start.cno;
vp->m_final = vp->m_stop;
return (0);
}