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/*
* LEVEE, or Captain Video; A vi clone
*
* Copyright (c) 1982-1997 David L Parsons
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by David L Parsons (orc@pell.chi.il.us). My name may not be used
* to endorse or promote products derived from this software without
* specific prior written permission. THIS SOFTWARE IS PROVIDED
* AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND
* FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <unistd.h>
#include <ctype.h>
#include "levee.h"
#include "extern.h"
#include "grep.h"
/* modification commands that can be accessed by either editcore || execmode */
/* put stuff into the yank buffer */
boolean doyank(int low, int high)
{
HANDLE f;
int sz;
yank.size = high - low;
moveleft(&core[low], yank.stuff, min(yank.size, SBUFSIZE));
if (yank.size > SBUFSIZE) {
if ((f = OPEN_NEW(yankbuf)) >= 0) {
low += SBUFSIZE;
sz = WRITE_TEXT(f, core + low, high - low);
CLOSE_FILE(f);
if (sz == high - low)
return TRUE;
}
yank.size = -1;
return FALSE;
}
return TRUE;
}
boolean deletion(int low, int high)
{
if (doyank(low, high)) /* fill yank buffer */
return delete_to_undo(&undo, low, high - low);
return FALSE;
}
/* move stuff from the yank buffer into core */
boolean putback(int start, int *newend)
{
int siz, st;
HANDLE f;
if (yank.size+bufmax < SIZE && yank.size > 0) {
*newend = start + yank.size;
if (start < bufmax)
moveright(&core[start], &core[start+yank.size], bufmax-start);
moveleft(yank.stuff, &core[start], min(SBUFSIZE, yank.size));
if (yank.size > SBUFSIZE) {
siz = yank.size - SBUFSIZE;
if ((f=OPEN_OLD(yankbuf)) >= 0) {
st = READ_TEXT(f, &core[start+SBUFSIZE], siz);
CLOSE_FILE(f);
if (st == siz)
goto succeed;
}
moveleft(&core[start+yank.size], &core[start], bufmax-start);
*newend = -1;
return FALSE;
}
succeed:
insert_to_undo(&undo, start, yank.size);
return TRUE;
}
return FALSE;
}
#define DSIZE 1024
/* makedest: make the replacement string for an regular expression */
int makedest(char *str, int start, int ssize, int size)
{
char *fr = dst;
char *to = str;
int as, asize, c;
while (*fr && size >= 0) {
if (*fr == AMPERSAND) { /* & copies in the pattern that we matched */
if ((size -= ssize) < 0)
return -1;
moveleft(&core[start],to,ssize);
to += ssize;
fr++;
}
else if (*fr == ESCAPE) { /* \1 .. \9 do arguments */
c = fr[1];
fr += 2;
if (c >= '1' && c <= '9') {
if ((as = RE_start[c-'1']) < 0)
continue;
asize = RE_size [c-'1'];
if ((size -= asize) < 0)
return -1;
moveleft(&core[as],to,asize);
to += asize;
}
else
*to++ = c;
}
else {
*to++ = *fr++;
--size;
}
}
return to-str;
}
int chop(int start, int *endd, boolean visual, boolean *query)
{
int i,retval;
char c;
/*>>>>
boolean ok;
<<<<*/
char dest[DSIZE];
int len, dlen;
retval = -1;
/*dlen = strlen(dst);*/
restart:
count = 1;
i = findfwd(pattern, start, *endd);
if (i != ERR) {
if (*query) {
/*>>>> don't delete -- keep for future use
if (visual) {
levee_mvcur(yp,setX(i));puts("?");
}
else {
<<<<*/
println();
writeline(-1,-1,bseekeol(i));
println();
levee_mvcur(-1,setX(i));
prints("^?");
/*>>>>
}
<<<<*/
do
c = tolower(readchar());
while (c!='y'&&c!='n'&&c!='q'&&c!='a');
if (c == 'n') {
start = i+1;
goto restart;
}
else if (c == 'q')
return retval;
else if (c == 'a')
*query = FALSE;
}
len = lastp-i;
dlen = makedest(dest, i, len, DSIZE);
if (dlen >= 0 && bufmax-(int)(len+dlen) < SIZE
&& delete_to_undo(&undo, i, len)) {
modified = TRUE;
if (dlen > 0) {
moveright(&core[i], &core[i+dlen], bufmax-i);
insert_to_undo(&undo,i,dlen);
moveleft(dest,&core[i],dlen);
}
*endd += (dlen-len);
retval = i+dlen;
}
}
return retval;
}
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