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AMICUS02.ADF
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word.c
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Wrap
C/C++ Source or Header
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1989-05-30
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9KB
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276 lines
/* word.c */
/*
* The routines in this file implement commands that work word at a time.
* There are all sorts of word mode commands. If I do any sentence and/or
* paragraph mode commands, they are likely to be put in this file.
*/
#include <stdio.h>
#include "ed.h"
/* Word wrap on n-spaces. Back-over whatever precedes the point on the current
* line and stop on the first word-break or the beginning of the line. If we
* reach the beginning of the line, jump back to the end of the word and start
* a new line. Otherwise, break the line at the word-break, eat it, and jump
* back to the end of the word.
* NOTE: This function may leaving trailing blanks.
* Returns TRUE on success, FALSE on errors.
*/
wrapword(n)
int n;
{
register int cnt, oldp;
oldp = curwp->w_dotp;
cnt = -1;
do {
cnt++;
if (! backchar(NULL, 1))
return(FALSE);
}
while (! inword());
if (! backword(NULL, 1))
return(FALSE);
if (oldp == (int) (curwp->w_dotp && curwp->w_doto)) {
if (! backdel(NULL, 1))
return(FALSE);
if (! newline(NULL, 1))
return(FALSE);
}
return(forwword(NULL, 1) && forwchar(NULL, cnt));
}
/*
* Move the cursor backward by "n" words. All of the details of motion are
* performed by the "backchar" and "forwchar" routines. Error if you try to
* move beyond the buffers.
*/
backword(f, n)
{
if (n < 0)
return (forwword(f, -n));
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
while (n--) {
while (inword() == FALSE) {
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
}
while (inword() != FALSE) {
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
}
}
return (forwchar(FALSE, 1));
}
/*
* Move the cursor forward by the specified number of words. All of the motion
* is done by "forwchar". Error if you try and move beyond the buffer's end.
*/
forwword(f, n)
{
if (n < 0)
return (backword(f, -n));
while (n--) {
while (inword() == FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
while (inword() != FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
}
return (TRUE);
}
/*
* Move the cursor forward by the specified number of words. As you move,
* convert any characters to upper case. Error if you try and move beyond the
* end of the buffer. Bound to "M-U".
*/
upperword(f, n)
{
register int c;
if (n < 0)
return (FALSE);
while (n--) {
while (inword() == FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (c>='a' && c<='z') {
c -= 'a'-'A';
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
}
return (TRUE);
}
/*
* Move the cursor forward by the specified number of words. As you move
* convert characters to lower case. Error if you try and move over the end of
* the buffer. Bound to "M-L".
*/
lowerword(f, n)
{
register int c;
if (n < 0)
return (FALSE);
while (n--) {
while (inword() == FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (c>='A' && c<='Z') {
c += 'a'-'A';
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
}
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. Bound to "M-C".
*/
capword(f, n)
{
register int c;
if (n < 0)
return (FALSE);
while (n--) {
while (inword() == FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
if (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (c>='a' && c<='z') {
c -= 'a'-'A';
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
while (inword() != FALSE) {
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (c>='A' && c<='Z') {
c += 'a'-'A';
lputc(curwp->w_dotp, curwp->w_doto, c);
lchange(WFHARD);
}
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
}
}
}
return (TRUE);
}
/*
* Kill forward by "n" words. Remember the location of dot. Move forward by
* the right number of words. Put dot back where it was and issue the kill
* command for the right number of characters. Bound to "M-D".
*/
delfword(f, n)
{
register int size;
register LINE *dotp;
register int doto;
if (n < 0)
return (FALSE);
dotp = curwp->w_dotp;
doto = curwp->w_doto;
size = 0;
while (n--) {
while (inword() == FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
++size;
}
while (inword() != FALSE) {
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
++size;
}
}
curwp->w_dotp = dotp;
curwp->w_doto = doto;
return (ldelete(size, TRUE));
}
/*
* Kill backwards by "n" words. Move backwards by the desired number of words,
* counting the characters. When dot is finally moved to its resting place,
* fire off the kill command. Bound to "M-Rubout" and to "M-Backspace".
*/
delbword(f, n)
{
register int size;
if (n < 0)
return (FALSE);
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
size = 0;
while (n--) {
while (inword() == FALSE) {
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
++size;
}
while (inword() != FALSE) {
if (backchar(FALSE, 1) == FALSE)
return (FALSE);
++size;
}
}
if (forwchar(FALSE, 1) == FALSE)
return (FALSE);
return (ldelete(size, TRUE));
}
/*
* 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()
{
register int c;
if (curwp->w_doto == llength(curwp->w_dotp))
return (FALSE);
c = lgetc(curwp->w_dotp, curwp->w_doto);
if (c>='a' && c<='z')
return (TRUE);
if (c>='A' && c<='Z')
return (TRUE);
if (c>='0' && c<='9')
return (TRUE);
if (c=='$' || c=='_') /* For identifiers */
return (TRUE);
return (FALSE);
}