op_result add_digit(int row, int col, int digit) {
if(in_range(row)){
if(in_range(col)){
if(in_range(digit)){
if(puzzle[row][col] != 0){
return OP_OCCUPIED;
}
if((row_contains(row,digit))||(col_contains(col,digit))){
return OP_ILLEGAL;
}
if(region_contains(row,col,digit)){
return OP_ILLEGAL;
}
puzzle[row][col] = digit;
return OP_OK;
}
}
}
return OP_BADARGS ;
}
static void
draw_line (size_t line, size_t startcol, Window wp,
size_t o, Region r, int highlight, size_t cur_tab_width)
{
term_move (line, 0);
/* Draw body of line. */
size_t x, i, line_len = buffer_line_len (get_window_bp (wp), o);
for (x = 0, i = startcol;; i++)
{
term_attrset (highlight && region_contains (r, o + i) ? FONT_REVERSE : FONT_NORMAL);
if (i >= line_len || x >= get_window_ewidth (wp))
break;
char c = get_buffer_char (get_window_bp (wp), o + i);
if (isprint (c))
{
term_addch (c);
x++;
}
else
{
const char *s = make_char_printable (c, x, cur_tab_width);
term_addstr (s);
x += strlen (s);
}
}
/* Draw end of line. */
if (x >= term_width ())
{
term_move (line, term_width () - 1);
term_attrset (FONT_NORMAL);
term_addstr ("$");
}
else
term_addstr (xasprintf ("%*s", (int) (get_window_ewidth (wp) - x), ""));
term_attrset (FONT_NORMAL);
}
void configure(FILE *puzzle_file) {
char line[5];//line buffer
int row;
int column;
int value;
int line_count = 0;
while(( fgets(line,5,puzzle_file)) != NULL){
row = line[0]-'0';
column = line[1]-'0';
value = line[2]-'0';
if(!in_range(row) || !in_range(column) || !in_range(value)){
printf("Illegal format in configuration file at line %d ", line_count);
exit(1);
}
if((puzzle[row][column] != 0)||(row_contains(row,value))||(col_contains(column,value))||(region_contains(row,column,value))){
printf("Illegal placement in configuration file at line %d ",line_count);
exit(1);
}
puzzle[row][column] = value;
fixed[row][column] = TRUE;
line_count += 1;
}
}