void doRemove(GtkWidget *button, Widgets *app)
{
tree = btopn("data/tudienanhviet.dat", 0, 0);
gchar *text;
GtkTextBuffer *textbuffer;
textbuffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(app->textview));
text = gtk_entry_get_text(GTK_ENTRY(app->searchentry));
char defnFind[6500];
int rsize;
long value;
int exist = bfndky(tree,text,&value);
if (exist == 0)
{
bdelky(tree, text);
gtk_entry_set_text(app->searchentry,"");
gtk_text_buffer_set_text(textbuffer,"",-1);
strcpy(thongbao_text,"Deleted data !");
gtk_label_set_text(thongbao,thongbao_text);
}
gtk_widget_hide(del);
gtk_widget_hide(edit);
gtk_widget_hide(add);
btcls(tree);
}
int binsky(BTA *b, char *key,BTint val)
{
BTint lval,dups_allowed;
int status;
KEYENT keyent;
bterr("",0,NULL);
if ((status=bvalap("BINSKY",b)) != 0) return(status);
btact = b;
if (btact->shared) {
if (!block()) {
bterr("BINSKY",QBUSY,NULL);
goto fin;
}
}
if (b->cntxt->super.smode != 0) {
/* read only, can't insert */
bterr("BINSKY",QNOWRT,NULL);
}
else {
dups_allowed = bgtinf(btact->cntxt->super.scroot,ZMISC);
strncpy(keyent.key,key,ZKYLEN);
keyent.key[ZKYLEN-1] = '\0';
keyent.val = val;
keyent.dup = ZNULL;
status = bfndky(b,keyent.key,&lval);
if (status == QNOKEY || (status == 0 && dups_allowed)) {
/* QNOKEY is not an error in this context; remove it */
bterr("",0,NULL);
if (status == 0) {
/* inserting duplicate key */
btdupkey(key,val);
}
else {
bleaf(1);
bputky(btact->cntxt->lf.lfblk,&keyent,ZNULL,ZNULL);
}
}
else {
bterr("BINSKY",QDUP,key);
}
}
fin:
if (btact->shared) bulock();
return(btgerr());
}
void doAdd(GtkWidget *button, Widgets *app){
tree = btopn("data/tudienanhviet.dat", 0, 0);
GtkTextIter start, end;
gchar *text,*btext;
GtkTextBuffer *textbuffer;
textbuffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(app->textview));
text = gtk_entry_get_text(GTK_ENTRY(app->searchentry));
gtk_text_buffer_get_bounds (textbuffer, &start, &end);
btext=gtk_text_buffer_get_text(textbuffer,&start,&end ,FALSE);
long value;
if (bfndky(tree,text,&value)!=0) //Neu s1 khong co
{
btins(tree,text,btext,strlen(btext)+1); //insert vao btree
strcpy(thongbao_text,"Added data !");
gtk_label_set_text(thongbao,thongbao_text);
}
gtk_widget_hide(add);
btcls(tree);
}
int bnxtky(BTA* b,char *key,BTint *val)
{
int idx,nkeys,status;
int found;
bterr("",0,NULL);
if ((status=bvalap("BNXTKY",b)) != 0) return(status);
btact = b; /* set global context pointer */
if (btact->shared) {
if (!block()) {
bterr("BNXTKY",QBUSY,NULL);
goto fin;
}
}
/* handle duplicate positioning */
found = btduppos(ZNEXT,val);
if (found > 0) {
goto fin;
}
else if (found == 0) {
strncpy(key,btact->cntxt->lf.lfkey,ZKYLEN);
key[ZKYLEN-1] = '\0';
goto fin;
}
if (btact->shared && btact->cntxt->lf.lfblk != ZNULL) {
/* position to last found key via bfndky, since context could
* have been invalidated by concurrent updates by other users.
* Note we don't care if the key is found or not, so the error
* status is always cleared. */
status = bfndky(btact,btact->cntxt->lf.lfkey,val);
bterr("",0,NULL);
}
found = FALSE;
while (btact->cntxt->lf.lfblk != ZNULL && !found) {
status = brdblk(btact->cntxt->lf.lfblk,&idx);
if (idx < 0) {
bterr("BNXTKY",QRDBLK,itostr(btact->cntxt->lf.lfblk));
break;
}
nkeys = bgtinf(btact->cntxt->lf.lfblk,ZNKEYS);
#if DEBUG >= 1
printf("BNXTKY: lfblk: " ZINTFMT ", lfpos: %d, nkeys: %d\n",
btact->cntxt->lf.lfblk,btact->cntxt->lf.lfpos,nkeys);
#endif
if (btact->cntxt->lf.lfpos >= nkeys || nkeys == 0) {
/* finished with this block (or no key was found at all),
* get parent from stack */
btact->cntxt->lf.lfpos = bpull();
btact->cntxt->lf.lfblk = bpull();
btact->cntxt->lf.lfexct = FALSE;
continue;
}
if (!btact->cntxt->lf.lfexct) {
btact->cntxt->lf.lfexct = TRUE;
}
else {
btact->cntxt->lf.lfpos++;
/* invalidate existing dup chain */
btact->cntxt->lf.draddr = ZNULL;
idx = bleaf(0);
if (idx < 0) continue;
}
if (btact->cntxt->lf.lfpos < nkeys) {
found = TRUE;
strncpy(key,
((btact->memrec)+idx)->keyblk[btact->cntxt->lf.lfpos].key,
ZKYLEN);
key[ZKYLEN-1] = '\0';
/* remember found key (need for shared mode) */
strncpy(btact->cntxt->lf.lfkey,key,ZKYLEN);
btact->cntxt->lf.lfkey[ZKYLEN-1] = '\0';
*val = ((btact->memrec)+idx)->keyblk[btact->cntxt->lf.lfpos].val;
btduppos(ZNEXT,val);
}
}
if (btact->cntxt->lf.lfblk == ZNULL) {
/* end of index reached */
bclrlf();
bterr("BNXTKY",QNOKEY,NULL);
}
fin:
if (btact->shared) bulock();
return btgerr();
}
