| /* |
| * Some utility functions on VTermRect structures |
| */ |
| |
| #define STRFrect "(%d,%d-%d,%d)" |
| #define ARGSrect(r) (r).start_row, (r).start_col, (r).end_row, (r).end_col |
| |
| /* Expand dst to contain src as well */ |
| static void rect_expand(VTermRect *dst, VTermRect *src) |
| { |
| if(dst->start_row > src->start_row) dst->start_row = src->start_row; |
| if(dst->start_col > src->start_col) dst->start_col = src->start_col; |
| if(dst->end_row < src->end_row) dst->end_row = src->end_row; |
| if(dst->end_col < src->end_col) dst->end_col = src->end_col; |
| } |
| |
| /* Clip the dst to ensure it does not step outside of bounds */ |
| static void rect_clip(VTermRect *dst, VTermRect *bounds) |
| { |
| if(dst->start_row < bounds->start_row) dst->start_row = bounds->start_row; |
| if(dst->start_col < bounds->start_col) dst->start_col = bounds->start_col; |
| if(dst->end_row > bounds->end_row) dst->end_row = bounds->end_row; |
| if(dst->end_col > bounds->end_col) dst->end_col = bounds->end_col; |
| /* Ensure it doesn't end up negatively-sized */ |
| if(dst->end_row < dst->start_row) dst->end_row = dst->start_row; |
| if(dst->end_col < dst->start_col) dst->end_col = dst->start_col; |
| } |
| |
| /* True if the two rectangles are equal */ |
| static int rect_equal(VTermRect *a, VTermRect *b) |
| { |
| return (a->start_row == b->start_row) && |
| (a->start_col == b->start_col) && |
| (a->end_row == b->end_row) && |
| (a->end_col == b->end_col); |
| } |
| |
| /* True if small is contained entirely within big */ |
| static int rect_contains(VTermRect *big, VTermRect *small) |
| { |
| if(small->start_row < big->start_row) return 0; |
| if(small->start_col < big->start_col) return 0; |
| if(small->end_row > big->end_row) return 0; |
| if(small->end_col > big->end_col) return 0; |
| return 1; |
| } |
| |
| /* True if the rectangles overlap at all */ |
| static int rect_intersects(VTermRect *a, VTermRect *b) |
| { |
| if(a->start_row > b->end_row || b->start_row > a->end_row) |
| return 0; |
| if(a->start_col > b->end_col || b->start_col > a->end_col) |
| return 0; |
| return 1; |
| } |