| 1 | # include "curses.h" |
| 2 | # include <ctype.h> |
| 3 | |
| 4 | # define min(a,b) (a < b ? a : b) |
| 5 | # define max(a,b) (a < b ? a : b) |
| 6 | |
| 7 | /* |
| 8 | * This routine writes win1 on win2 non-destructively. |
| 9 | * |
| 10 | * 1/26/81 (Berkeley) @(#)overlay.c 1.1 |
| 11 | */ |
| 12 | overlay(win1, win2) |
| 13 | reg WINDOW *win1, *win2; { |
| 14 | |
| 15 | reg char *sp, *end; |
| 16 | reg int x, y, endy, endx, starty, startx, y_top, |
| 17 | y_bot, x_left, x_right; |
| 18 | |
| 19 | # ifdef DEBUG |
| 20 | fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); |
| 21 | # endif |
| 22 | y_top = max(win1->_begy, win2->_begy); |
| 23 | y_bot = min(win1->_maxy, win2->_maxy); |
| 24 | x_left = max(win1->_begx, win2->_begx); |
| 25 | x_right = min(win1->_maxx, win2->_maxx); |
| 26 | starty = y_top - win1->_begy; |
| 27 | startx = x_left - win1->_begx; |
| 28 | endy = y_bot - win1->_begy; |
| 29 | endx = x_right - win1->_begx; |
| 30 | for (y = starty; y < endy; y++) { |
| 31 | end = &win1->_y[y][endx]; |
| 32 | x = startx + win1->_begx; |
| 33 | for (sp = &win1->_y[y][startx]; sp <= end; sp++) { |
| 34 | if (!isspace(*sp)) |
| 35 | mvwaddch(win2, y + win1->_begy, x, *sp); |
| 36 | x++; |
| 37 | } |
| 38 | } |
| 39 | } |