15b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* 25b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey * Some utility functions on VTermRect structures 35b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey */ 45b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 55b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey#define STRFrect "(%d,%d-%d,%d)" 65b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey#define ARGSrect(r) (r).start_row, (r).start_col, (r).end_row, (r).end_col 75b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 85b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* Expand dst to contain src as well */ 95b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkeystatic void rect_expand(VTermRect *dst, VTermRect *src) 105b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey{ 115b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->start_row > src->start_row) dst->start_row = src->start_row; 125b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->start_col > src->start_col) dst->start_col = src->start_col; 135b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_row < src->end_row) dst->end_row = src->end_row; 145b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_col < src->end_col) dst->end_col = src->end_col; 155b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey} 165b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 175b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* Clip the dst to ensure it does not step outside of bounds */ 185b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkeystatic void rect_clip(VTermRect *dst, VTermRect *bounds) 195b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey{ 205b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->start_row < bounds->start_row) dst->start_row = bounds->start_row; 215b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->start_col < bounds->start_col) dst->start_col = bounds->start_col; 225b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_row > bounds->end_row) dst->end_row = bounds->end_row; 235b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_col > bounds->end_col) dst->end_col = bounds->end_col; 245b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey /* Ensure it doesn't end up negatively-sized */ 255b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_row < dst->start_row) dst->end_row = dst->start_row; 265b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(dst->end_col < dst->start_col) dst->end_col = dst->start_col; 275b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey} 285b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 295b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* True if the two rectangles are equal */ 305b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkeystatic int rect_equal(VTermRect *a, VTermRect *b) 315b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey{ 325b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey return (a->start_row == b->start_row) && 335b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey (a->start_col == b->start_col) && 345b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey (a->end_row == b->end_row) && 355b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey (a->end_col == b->end_col); 365b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey} 375b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 385b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* True if small is contained entirely within big */ 395b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkeystatic int rect_contains(VTermRect *big, VTermRect *small) 405b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey{ 415b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(small->start_row < big->start_row) return 0; 425b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(small->start_col < big->start_col) return 0; 435b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(small->end_row > big->end_row) return 0; 445b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(small->end_col > big->end_col) return 0; 455b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey return 1; 465b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey} 475b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey 485b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey/* True if the rectangles overlap at all */ 495b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkeystatic int rect_intersects(VTermRect *a, VTermRect *b) 505b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey{ 515b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(a->start_row > b->end_row || b->start_row > a->end_row) 525b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey return 0; 535b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey if(a->start_col > b->end_col || b->start_col > a->end_col) 545b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey return 0; 555b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey return 1; 565b78a3aa7741c3f44b676ccffa765cecee1cbd4cJeff Sharkey} 57