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