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/*
* Word mode commands.
* The routines in this file
* implement commands that work word at
* a time. There are all sorts of word mode
* commands.
*/
#include "def.h"
/*
* Move the cursor backward by
* "n" words. All of the details of motion
* are performed by the "backchar" and "forwchar"
* routines.
*/
/* ARGSUSED */
backword(f, n)
{
if (n < 0)
return forwword(f | FFRAND, -n);
if (backchar(FFRAND, 1) == FALSE)
return FALSE;
while (n--) {
while (inword() == FALSE) {
if (backchar(FFRAND, 1) == FALSE)
return TRUE;
}
while (inword() != FALSE) {
if (backchar(FFRAND, 1) == FALSE)
return TRUE;
}
}
return forwchar(FFRAND, 1);
}
/*
* Move the cursor forward by
* the specified number of words. All of the
* motion is done by "forwchar".
*/
/* ARGSUSED */
forwword(f, n)
{
if (n < 0)
return backword(f | FFRAND, -n);
while (n--) {
while (inword() == FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
while (inword() != FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
}
return TRUE;
}
/*
* Move the cursor forward by
* the specified number of words. As you move,
* convert any characters to upper case.
*/
/* ARGSUSED */
upperword(f, n)
{
register int c;
if (n < 0)
return FALSE;
while (n--) {
while (inword() == FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (ISLOWER(c) != FALSE) {
c = TOUPPER(c);
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
}
return TRUE;
}
/*
* Move the cursor forward by
* the specified number of words. As you move
* convert characters to lower case.
*/
/* ARGSUSED */
lowerword(f, n)
{
register int c;
if (n < 0)
return FALSE;
while (n--) {
while (inword() == FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (ISUPPER(c) != FALSE) {
c = TOLOWER(c);
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
}
return TRUE;
}
/*
* Move the cursor forward by
* the specified number of words. As you move
* convert the first character of the word to upper
* case, and subsequent characters to lower case. Error
* if you try and move past the end of the buffer.
*/
/* ARGSUSED */
capword(f, n)
{
register int c;
VOID lchange();
if (n < 0)
return FALSE;
while (n--) {
while (inword() == FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
if (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (ISLOWER(c) != FALSE) {
c = TOUPPER(c);
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (ISUPPER(c) != FALSE) {
c = TOLOWER(c);
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FFRAND, 1) == FALSE)
return TRUE;
}
}
}
return TRUE;
}
/*
* Kill forward by "n" words.
*/
/* ARGSUSED */
delfword(f, n)
{
register RSIZE size;
register LINE *dotp;
register int doto;
if (n < 0)
return FALSE;
if ((lastflag & CFKILL) == 0) /* Purge kill buffer. */
kdelete();
thisflag |= CFKILL;
dotp = curwp->w_dotp;
doto = curwp->w_doto;
size = 0;
while (n--) {
while (inword() == FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
goto out; /* Hit end of buffer. */
++size;
}
while (inword() != FALSE) {
if (forwchar(FFRAND, 1) == FALSE)
goto out; /* Hit end of buffer. */
++size;
}
}
out:
curwp->w_dotp = dotp;
curwp->w_doto = doto;
return (ldelete(size, KFORW));
}
/*
* Kill backwards by "n" words. The rules
* for success and failure are now different, to prevent
* strange behavior at the start of the buffer. The command
* only fails if something goes wrong with the actual delete
* of the characters. It is successful even if no characters
* are deleted, or if you say delete 5 words, and there are
* only 4 words left. I considered making the first call
* to "backchar" special, but decided that that would just
* be wierd. Normally this is bound to "M-Rubout" and
* to "M-Backspace".
*/
/* ARGSUSED */
delbword(f, n)
{
register RSIZE size;
VOID kdelete();
if (n < 0)
return FALSE;
if ((lastflag & CFKILL) == 0) /* Purge kill buffer. */
kdelete();
thisflag |= CFKILL;
if (backchar(FFRAND, 1) == FALSE)
return (TRUE); /* Hit buffer start. */
size = 1; /* One deleted. */
while (n--) {
while (inword() == FALSE) {
if (backchar(FFRAND, 1) == FALSE)
goto out; /* Hit buffer start. */
++size;
}
while (inword() != FALSE) {
if (backchar(FFRAND, 1) == FALSE)
goto out; /* Hit buffer start. */
++size;
}
}
if (forwchar(FFRAND, 1) == FALSE)
return FALSE;
--size; /* Undo assumed delete. */
out:
return ldelete(size, KBACK);
}
/*
* Return TRUE if the character at dot
* is a character that is considered to be
* part of a word. The word character list is hard
* coded. Should be setable.
*/
inword()
{
/* can't use lgetc in ISWORD due to bug in OSK cpp */
return curwp->w_doto != llength(curwp->w_dotp) &&
ISWORD(curwp->w_dotp->l_text[curwp->w_doto]);
}
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