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1.1 root 1: # include "curses.ext"
2:
3: short *calloc();
4: WINDOW *malloc();
5:
6: static WINDOW *makenew();
7:
8: # undef nl /* don't need it here, and it interferes */
9:
10: WINDOW *
11: newwin(num_lines, num_cols, begy, begx)
12: int num_lines, num_cols, begy, begx;
13: {
14: reg WINDOW *win;
15: reg char *sp;
16: reg int i, by, bx, nl, nc;
17:
18: by = begy;
19: bx = begx;
20: nl = num_lines;
21: nc = num_cols;
22:
23: if (nl == 0)
24: nl = LINES - by;
25: if (nc == 0)
26: nc = COLS - bx;
27: if ((win = makenew(nl, nc, by, bx)) == NULL)
28: return ERR;
29: for (i = 0; i < nl; i++)
30: if ((win->_y[i] = (char *) calloc(nc, sizeof (char))) == NULL) {
31: reg int j;
32:
33: for (j = 0; j < i; j++)
34: cfree(win->_y[j]);
35: cfree(win->_firstch);
36: cfree(win->_lastch);
37: cfree(win->_y);
38: cfree(win);
39: return ERR;
40: }
41: else
42: for (sp = win->_y[i]; sp < win->_y[i] + nc; )
43: *sp++ = ' ';
44: return win;
45: }
46:
47: WINDOW *
48: subwin(orig, num_lines, num_cols, begy, begx)
49: reg WINDOW *orig;
50: int num_lines, num_cols, begy, begx; {
51:
52: reg int i;
53: reg WINDOW *win;
54: reg int by, bx, nl, nc;
55: reg int j, k;
56:
57: by = begy;
58: bx = begx;
59: nl = num_lines;
60: nc = num_cols;
61:
62: /*
63: * make sure window fits inside the original one
64: */
65: # ifdef DEBUG
66: fprintf(outf, "SUBWIN(%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
67: # endif
68: if (by < orig->_begy || bx < orig->_begx
69: || by + nl > orig->_maxy || bx + nc > orig->_maxx)
70: return ERR;
71: if (nl == 0)
72: nl = orig->_maxy - orig->_begy - by;
73: if (nc == 0)
74: nc = orig->_maxx - orig->_begx - bx;
75: if ((win = makenew(nl, nc, by, bx)) == NULL)
76: return ERR;
77: j = orig->_begy + by;
78: k = orig->_begx + bx;
79: for (i = 0; i < nl; i++)
80: win->_y[i] = &orig->_y[j++][k];
81: win->_flags = _SUBWIN;
82: return win;
83: }
84:
85: /*
86: * This routine sets up a window buffer and returns a pointer to it.
87: */
88: static WINDOW *
89: makenew(num_lines, num_cols, begy, begx)
90: int num_lines, num_cols, begy, begx; {
91:
92: reg int i;
93: reg WINDOW *win;
94: reg int by, bx, nl, nc;
95:
96: by = begy;
97: bx = begx;
98: nl = num_lines;
99: nc = num_cols;
100:
101: # ifdef DEBUG
102: fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx);
103: # endif
104: if ((win = (WINDOW *) malloc(sizeof (WINDOW))) == NULL)
105: return NULL;
106: # ifdef DEBUG
107: fprintf(outf, "MAKENEW: nl = %d\n", nl);
108: # endif
109: if ((win->_y = (char **) calloc(nl, sizeof (char *))) == NULL) {
110: cfree(win);
111: return (WINDOW *) NULL;
112: }
113: if ((win->_firstch = calloc(nl, sizeof (short))) == NULL) {
114: cfree(win);
115: cfree(win->_y);
116: }
117: if ((win->_lastch = calloc(nl, sizeof (short))) == NULL) {
118: cfree(win);
119: cfree(win->_y);
120: cfree(win->_firstch);
121: }
122: # ifdef DEBUG
123: fprintf(outf, "MAKENEW: nc = %d\n", nc);
124: # endif
125: win->_cury = win->_curx = 0;
126: win->_clear = (nl == LINES && nc == COLS);
127: win->_maxy = nl;
128: win->_maxx = nc;
129: win->_begy = by;
130: win->_begx = bx;
131: win->_scroll = win->_leave = FALSE;
132: for (i = 0; i < nl; i++)
133: win->_firstch[i] = win->_lastch[i] = _NOCHANGE;
134: win->_flags = 0;
135: if (bx + nc == COLS) {
136: win->_flags |= _ENDLINE;
137: if (bx == 0 && nl == LINES && by == 0)
138: win->_flags |= _FULLWIN;
139: if (by + nl == LINES)
140: win->_flags |= _SCROLLWIN;
141: }
142: # ifdef DEBUG
143: fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
144: fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave);
145: fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll);
146: fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
147: fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
148: fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
149: fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
150: fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
151: # endif
152: return win;
153: }
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