extern status add_poly( polynomial *p_poly1, polynomial *p_poly2 ) {
/* Polynomial p_poly1 += p_poly2, p_poly2 = 0 */
list lastreturn = NULL, match_node ;
term *p_term, *p_match_term ;
int coef, degree ;
while( ( lastreturn = list_iterator( *p_poly1, lastreturn ) ) != NULL ) {
p_term = ( term * ) DATA( lastreturn ) ;
if( find_key( *p_poly2, (generic_ptr )p_term, cmp_degree, &match_node ) == OK ) {
p_match_term = ( term * ) DATA( match_node ) ;
p_term -> coefficient += p_match_term -> coefficient ;
delete_node( p_poly2, match_node ) ;
free( p_match_term ) ;
}
}
while( empty_list( *p_poly2 ) == FALSE ) {
if( term_delete( p_poly2, &coef, °ree ) == ERROR ) return ERROR ;
else if( term_insert( p_poly1, coef, degree ) == ERROR ) return ERROR ;
}
return OK ;
}
/* Update the %_terms table to map the term [zTerm] to the given rowid. */
static int index_insert_term(fulltext_vtab *v, const char *zTerm, int nTerm,
sqlite_int64 iDocid, DocList *p){
sqlite_int64 iFirst;
sqlite_int64 iIndexRow;
DocList doclist;
int rc = term_chunk_select(v, zTerm, nTerm, iDocid, &iFirst);
if( rc==SQLITE_DONE ){
docListInit(&doclist, DL_POSITIONS_OFFSETS, 0, 0);
if( docListUpdate(&doclist, iDocid, p) ){
rc = term_insert(v, zTerm, nTerm, iDocid, &doclist);
docListDestroy(&doclist);
return rc;
}
return SQLITE_OK;
}
if( rc!=SQLITE_ROW ) return SQLITE_ERROR;
/* This word is in the index; add this document ID to its blob. */
rc = term_select(v, zTerm, nTerm, iFirst, &iIndexRow, &doclist);
if( rc!=SQLITE_OK ) return rc;
if( docListUpdate(&doclist, iDocid, p) ){
/* If the blob is too big, split it in half. */
if( doclist.nData>CHUNK_MAX ){
DocList half;
if( docListSplit(&doclist, &half) ){
rc = term_insert(v, zTerm, nTerm, firstDocid(&half), &half);
docListDestroy(&half);
if( rc!=SQLITE_OK ) goto err;
}
}
rc = term_update(v, iIndexRow, &doclist);
}
err:
docListDestroy(&doclist);
return rc;
}
/*
* input_add_character: adds the character c to the input buffer, repecting
* the current overwrite/insert mode status, etc
*/
void input_add_character(char c, char *unused)
{
int display_flag = NO_UPDATE;
cursor_to_input();
if (THIS_POS < INPUT_BUFFER_SIZE) {
if (get_int_var(INSERT_MODE_VAR)) {
if (THIS_CHAR) {
char *ptr = NULL;
ptr = strdup(&(THIS_CHAR));
THIS_CHAR = c;
NEXT_CHAR = 0;
ADD_TO_INPUT(ptr);
free(ptr);
if (term_insert(c)) {
term_putchar(c);
if (NEXT_CHAR)
display_flag = UPDATE_FROM_CURSOR;
else
display_flag = NO_UPDATE;
}
} else {
THIS_CHAR = c;
NEXT_CHAR = 0;
term_putchar(c);
}
} else {
if (THIS_CHAR == 0)
NEXT_CHAR = 0;
THIS_CHAR = c;
term_putchar(c);
}
THIS_POS++;
update_input(display_flag);
}
if (in_completion == STATE_COMPLETE && c == ' ' && input_lastmsg) {
new_free(&input_lastmsg);
*new_nick = 0;
in_completion = STATE_NORMAL;
}
}
extern status read_poly( polynomial *p_poly ) {
/* Read standard input for coefficients and degrees and create a list of terms( a polynomial). Input is terminated when 0,0 is entered */
int coef, degree ;
if( init_list( p_poly ) == ERROR ) return ERROR ;
do {
printf( "Enter the coefficient, degree (0,0 when done):" ) ;
scanf( "%d,%d", &coef, °ree ) ;
if( coef != 0 ) {
if( term_insert( p_poly, coef, degree ) == ERROR ) {
return ERROR ;
}
}
} while ( coef != 0 || degree != 0 ) ;
return OK ;
}
