/* replace a range of lines with the joined text of those lines */
bool join_lines( const int from, const int to, const bool isglobal )
{
static char * buf = 0;
static int bufsz = 0;
int size = 0;
line_t * const ep = search_line_node( inc_addr( to ) );
line_t * bp = search_line_node( from );
while( bp != ep )
{
const char * const s = get_sbuf_line( bp );
if( !s || !resize_buffer( &buf, &bufsz, size + bp->len ) ) return false;
memcpy( buf + size, s, bp->len );
size += bp->len;
bp = bp->q_forw;
}
if( !resize_buffer( &buf, &bufsz, size + 2 ) ) return false;
memcpy( buf + size, "\n", 2 );
size += 2;
if( !delete_lines( from, to, isglobal ) ) return false;
current_addr_ = from - 1;
disable_interrupts();
if( !put_sbuf_line( buf, size, current_addr_ ) ||
!push_undo_atom( UADD, current_addr_, current_addr_ ) )
{ enable_interrupts(); return false; }
modified_ = true;
enable_interrupts();
return true;
}
/* for each line in a range, change text matching a pattern according to
a substitution template; return false if error */
char search_and_replace( const int first_addr, const int second_addr,
const int gflags, const int snum, const char isglobal )
{
int lc;
char match_found = 0;
set_current_addr( first_addr - 1 );
for( lc = 0; lc <= second_addr - first_addr; ++lc )
{
line_t *lp = search_line_node( inc_current_addr() );
int len = replace_matching_text( lp, gflags, snum );
if( len < 0 ) return 0;
if( len )
{
const char *txt = rbuf;
const char *eot = rbuf + len;
undo_t *up = 0;
disable_interrupts();
if( !delete_lines( current_addr(), current_addr(), isglobal ) ) return 0;
do {
txt = put_sbuf_line( txt, current_addr() );
if( !txt ) { enable_interrupts(); return 0; }
if( up ) up->tail = search_line_node( current_addr() );
else if( !( up = push_undo_atom( UADD, -1, -1 ) ) )
{ enable_interrupts(); return 0; }
}
while( txt != eot );
enable_interrupts();
match_found = 1;
}
}
if( !match_found && !( gflags & GLB ) )
{ set_error_msg( "No match" ); return 0; }
return 1;
}
/* search_and_replace: for each line in a range, change text matching a pattern
according to a substitution template; return status */
int
search_and_replace(pattern_t *pat, int gflag, int kth)
{
undo_t *up;
const char *txt;
const char *eot;
long lc;
long xa = current_addr;
int nsubs = 0;
line_t *lp;
int len;
current_addr = first_addr - 1;
for (lc = 0; lc <= second_addr - first_addr; lc++) {
lp = get_addressed_line_node(++current_addr);
if ((len = substitute_matching_text(pat, lp, gflag, kth)) < 0)
return ERR;
else if (len) {
up = NULL;
if (delete_lines(current_addr, current_addr) < 0)
return ERR;
txt = rbuf;
eot = rbuf + len;
SPL1();
do {
if ((txt = put_sbuf_line(txt)) == NULL) {
SPL0();
return ERR;
} else if (up)
up->t = get_addressed_line_node(current_addr);
else if ((up = push_undo_stack(UADD,
current_addr, current_addr)) == NULL) {
SPL0();
return ERR;
}
} while (txt != eot);
SPL0();
nsubs++;
xa = current_addr;
}
}
current_addr = xa;
if (nsubs == 0 && !(gflag & GLB)) {
errmsg = "no match";
return ERR;
} else if ((gflag & (GPR | GLS | GNP)) &&
display_lines(current_addr, current_addr, gflag) < 0)
return ERR;
return 0;
}
/* read_stream: read a stream into the editor buffer; return status */
int
read_stream(FILE *fp, int n)
{
line_t *lp = get_addressed_line_node(n);
undo_t *up = NULL;
unsigned int size = 0;
int o_newline_added = newline_added;
int o_isbinary = isbinary;
int appended = (n == addr_last);
int len;
isbinary = newline_added = 0;
#ifdef DES
if (des)
init_des_cipher();
#endif
for (current_addr = n; (len = get_stream_line(fp)) > 0; size += len) {
SPL1();
if (put_sbuf_line(sbuf) == NULL) {
SPL0();
return ERR;
}
lp = lp->q_forw;
if (up)
up->t = lp;
else if ((up = push_undo_stack(UADD, current_addr,
current_addr)) == NULL) {
SPL0();
return ERR;
}
SPL0();
}
if (len < 0)
return ERR;
if (appended && size && o_isbinary && o_newline_added)
fputs("newline inserted\n", stderr);
else if (newline_added && (!appended || (!isbinary && !o_isbinary)))
fputs("newline appended\n", stderr);
if (isbinary && newline_added && !appended)
size += 1;
if (!size)
newline_added = 1;
newline_added = appended ? newline_added : o_newline_added;
isbinary = isbinary | o_isbinary;
if (des)
size += 8 - size % 8; /* adjust DES size */
return size;
}
/* Insert text from stdin (or from command buffer if global) to after
line n; stop when either a single period is read or EOF.
Return false if insertion fails. */
bool append_lines( const char ** const ibufpp, const int addr,
const bool isglobal )
{
int size = 0;
undo_t * up = 0;
current_addr_ = addr;
while( true )
{
if( !isglobal )
{
*ibufpp = get_tty_line( &size );
if( !*ibufpp ) return false;
if( size == 0 || (*ibufpp)[size-1] != '\n' )
{ clearerr( stdin ); return ( size == 0 ); }
}
else
{
if( !**ibufpp ) return true;
for( size = 0; (*ibufpp)[size++] != '\n'; ) ;
}
if( size == 2 && **ibufpp == '.' ) { *ibufpp += size; return true; }
disable_interrupts();
if( !put_sbuf_line( *ibufpp, size, current_addr_ ) )
{ enable_interrupts(); return false; }
if( up ) up->tail = search_line_node( current_addr_ );
else
{
up = push_undo_atom( UADD, current_addr_, current_addr_ );
if( !up ) { enable_interrupts(); return false; }
}
*ibufpp += size;
modified_ = true;
enable_interrupts();
}
}
