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hxpatch.c
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hxpatch.c
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/* @(#) hxpatch - patch functions for hx */
#include "hx.h"
patch(fname)
char *fname;
{
unsigned int c;
short nread;
char buf[CHARS_ROW*MAXROWS];
char mode = ASC;
mvwdeleteln(menuwin,0,0);
wdeleteln(menuwin);
wmove ( menuwin, 0, 0 );
waddstr ( menuwin, patch1 );
wmove ( menuwin, 1, 0 );
waddstr ( menuwin, patch2 );
wrefresh( menuwin );
fseek ( fp, homepos, 0 );
nread = fread ( buf, 1, CHARS_ROW*MAXROWS, fp );
keypad( datawin, TRUE );
wmove ( datawin, 0, ASC_COL0 );
while ( 1 ){
wrefresh( datawin );
c = wgetch (datawin);
switch ( c ){
case '\t':
mode= mode==ASC?HEX:ASC;
/* fall through */
case ('h' - 0x40): /* <control keys */
case ('j' - 0x40):
case ('k' - 0x40):
case ('l' - 0x40):
case KEY_LL:
case KEY_HOME:
case KEY_UP:
case KEY_DOWN:
case KEY_LEFT:
case BS:
case KEY_RIGHT:
case '\n':
case '\r':
pchmov ( c, mode );
break;
case ESC:
endpatch:
wcommwin( "Write changes (y/n)?: ");
echo();
c = wgetch(commwin);
c = toupper ( c );
noecho();
mvwdeleteln(menuwin,0,0);
wdeleteln(menuwin);
wmove ( menuwin, 0, 0);
waddstr ( menuwin, menu1 );
wmove ( menuwin, 1, 0);
waddstr ( menuwin, menu2 );
wmove ( menuwin, 2, 0);
waddstr ( menuwin, menu3 );
wrefresh( menuwin );
if ( c == 'Y' ){ /* write changes */
fseek ( fp, homepos, 0 );
fwrite ( buf, 1, nread, fp );
fflush ( fp );
keypad( datawin, FALSE );
return;
}
/* put back original data */
fpos = homepos;
disppage(fname);
wcommwin ( "Changes ignored!");
keypad( datawin, FALSE );
return;
default:
if ( mode == ASC ){
if ( isprint ( c ) )
ascrepl ( (char)c, buf );
} else if ( mode == HEX && ishex ( c ) )
hexrepl ( (char)c, buf );
else
flash ();
break;
}
if ( doneflag ){
doneflag=FALSE;
goto endpatch;
}
}
}
pchmov ( c, mode )
int c;
char mode;
{
char x,y;
int col0, factor, mid;
if ( mode == ASC ){
factor = 1;
col0 = ASC_COL0;
mid = ASC_MID;
} else {
factor = 3;
col0 = HEX_COL0;
mid = HEX_MID;
}
getyx ( datawin, y, x );
switch ( c ){
case '\t':
wmove ( datawin, y, col0 );
return;
case KEY_LL:
wmove ( datawin, MAXROWS-1, col0 + CHARS_ROW );
return;
case KEY_HOME:
wmove ( datawin, 0, col0 );
return;
case ('h' - 0x40): /* <control h> */
case KEY_LEFT:
case BS:
if ( x == col0 ){ /* at left margin */
if ( y == 0 ){ /* at home position */
flash();
return;
}
--y;
x = col0 + ((CHARS_ROW-1)*factor)+1; /* goto pre line */
} else
/* backup, position over center*/
x -= (factor + (x==mid?1:0));
wmove ( datawin, y, x );
return;
case ('l' - 0x40): /* <control l> */
case KEY_RIGHT:
x += factor;
if ( x == col0+(CHARS_ROW*factor) ){
if ( y == MAXROWS-1 ){
flash();
return;
}
++y;
x = col0;
}
if ( x == mid ) ++x;
wmove ( datawin, y, x );
return;
case ('j' - 0x40): /* <control j> */
case KEY_DOWN:
if ( y == MAXROWS-1 ){
flash();
return;
}
wmove ( datawin, ++y, x );
return;
case ('k' - 0x40): /* <control k> */
case KEY_UP:
if ( y == 0 ){
flash();
return;
}
wmove ( datawin, --y, x );
return;
case '\n':
case '\r':
if ( y == MAXROWS-1 ){
flash();
return;
}
wmove ( datawin, ++y, col0 );
return;
}
}
srchasc(str,len,fname)
register char *str;
int len;
char *fname;
{
register int i;
register int c;
register long cursec;
register char *ptr;
cursec = fpos / 512; /* check for when to repaint heading */
while ( !doneflag && (c = getc(fp)) != EOF ) {
if ( ++fpos / 512 != cursec ){
cursec = fpos / 512;
hxfsect ( fpos );
wrefresh(headwin);
}
if (c == *str){
for (ptr = str+1,i=len; --i; ptr++)
if ((c = getc(fp)) != *ptr){
fseek ( fp, fpos, 0 );
break;
}
if (!i){
--fpos;
return( TRUE );
}
}
}
if ( doneflag == TRUE )
disppage(fname);
doneflag = FALSE;
return( FALSE );
}