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1.1 root 1: /*
2: * allocate space for and set up defaults for a new window
3: *
4: * 1/26/81 (Berkeley) %W
5: */
6:
7: # include "curses.ext"
8:
9: short *calloc();
10: WINDOW *malloc();
11:
12: static WINDOW *makenew();
13:
14: # undef nl /* don't need it here, and it interferes */
15:
16: WINDOW *
17: newwin(num_lines, num_cols, begy, begx)
18: int num_lines, num_cols, begy, begx;
19: {
20: reg WINDOW *win;
21: reg char *sp;
22: reg int i, by, bx, nl, nc;
23:
24: by = begy;
25: bx = begx;
26: nl = num_lines;
27: nc = num_cols;
28:
29: if (nl == 0)
30: nl = LINES - by;
31: if (nc == 0)
32: nc = COLS - bx;
33: if ((win = makenew(nl, nc, by, bx)) == NULL)
34: return ERR;
35: for (i = 0; i < nl; i++)
36: if ((win->_y[i] = (char *) calloc(nc, sizeof (char))) == NULL) {
37: reg int j;
38:
39: for (j = 0; j < i; j++)
40: cfree(win->_y[j]);
41: cfree(win->_firstch);
42: cfree(win->_lastch);
43: cfree(win->_y);
44: cfree(win);
45: return ERR;
46: }
47: else
48: for (sp = win->_y[i]; sp < win->_y[i] + nc; )
49: *sp++ = ' ';
50: return win;
51: }
52:
53: WINDOW *
54: subwin(orig, num_lines, num_cols, begy, begx)
55: reg WINDOW *orig;
56: int num_lines, num_cols, begy, begx; {
57:
58: reg int i;
59: reg WINDOW *win;
60: reg int by, bx, nl, nc;
61: reg int j, k;
62:
63: by = begy;
64: bx = begx;
65: nl = num_lines;
66: nc = num_cols;
67:
68: /*
69: * make sure window fits inside the original one
70: */
71: # ifdef DEBUG
72: fprintf(outf, "SUBWIN(%0.2o, %d, %d, %d, %d)\n", orig, nl, nc, by, bx);
73: # endif
74: if (by < orig->_begy || bx < orig->_begx
75: || by + nl > orig->_maxy || bx + nc > orig->_maxx)
76: return ERR;
77: if (nl == 0)
78: nl = orig->_maxy - orig->_begy - by;
79: if (nc == 0)
80: nc = orig->_maxx - orig->_begx - bx;
81: if ((win = makenew(nl, nc, by, bx)) == NULL)
82: return ERR;
83: j = orig->_begy + by;
84: k = orig->_begx + bx;
85: for (i = 0; i < nl; i++)
86: win->_y[i] = &orig->_y[j++][k];
87: win->_flags = _SUBWIN;
88: return win;
89: }
90:
91: /*
92: * This routine sets up a window buffer and returns a pointer to it.
93: */
94: static WINDOW *
95: makenew(num_lines, num_cols, begy, begx)
96: int num_lines, num_cols, begy, begx; {
97:
98: reg int i;
99: reg WINDOW *win;
100: reg int by, bx, nl, nc;
101:
102: by = begy;
103: bx = begx;
104: nl = num_lines;
105: nc = num_cols;
106:
107: # ifdef DEBUG
108: fprintf(outf, "MAKENEW(%d, %d, %d, %d)\n", nl, nc, by, bx);
109: # endif
110: if ((win = (WINDOW *) malloc(sizeof (WINDOW))) == NULL)
111: return NULL;
112: # ifdef DEBUG
113: fprintf(outf, "MAKENEW: nl = %d\n", nl);
114: # endif
115: if ((win->_y = (char **) calloc(nl, sizeof (char *))) == NULL) {
116: cfree(win);
117: return (WINDOW *) NULL;
118: }
119: if ((win->_firstch = calloc(nl, sizeof (short))) == NULL) {
120: cfree(win);
121: cfree(win->_y);
122: }
123: if ((win->_lastch = calloc(nl, sizeof (short))) == NULL) {
124: cfree(win);
125: cfree(win->_y);
126: cfree(win->_firstch);
127: }
128: # ifdef DEBUG
129: fprintf(outf, "MAKENEW: nc = %d\n", nc);
130: # endif
131: win->_cury = win->_curx = 0;
132: win->_clear = (nl == LINES && nc == COLS);
133: win->_maxy = nl;
134: win->_maxx = nc;
135: win->_begy = by;
136: win->_begx = bx;
137: win->_scroll = win->_leave = FALSE;
138: for (i = 0; i < nl; i++)
139: win->_firstch[i] = win->_lastch[i] = _NOCHANGE;
140: if (bx + nc == COLS) {
141: win->_flags |= _ENDLINE;
142: if (bx == 0 && nl == LINES && by == 0)
143: win->_flags |= _FULLWIN;
144: if (by + nl == LINES)
145: win->_flags |= _SCROLLWIN;
146: }
147: # ifdef DEBUG
148: fprintf(outf, "MAKENEW: win->_clear = %d\n", win->_clear);
149: fprintf(outf, "MAKENEW: win->_leave = %d\n", win->_leave);
150: fprintf(outf, "MAKENEW: win->_scroll = %d\n", win->_scroll);
151: fprintf(outf, "MAKENEW: win->_flags = %0.2o\n", win->_flags);
152: fprintf(outf, "MAKENEW: win->_maxy = %d\n", win->_maxy);
153: fprintf(outf, "MAKENEW: win->_maxx = %d\n", win->_maxx);
154: fprintf(outf, "MAKENEW: win->_begy = %d\n", win->_begy);
155: fprintf(outf, "MAKENEW: win->_begx = %d\n", win->_begx);
156: # endif
157: return win;
158: }
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