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a8577ffd EW |
1 | /* |
2 | * Copyright (c) 1989 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
3dd3a9e5 KB |
5 | * This code is derived from software contributed to Berkeley by |
6 | * Edward Wang at The University of California, Berkeley. | |
7 | * | |
87f529ec | 8 | * %sccs.include.redist.c% |
a8577ffd EW |
9 | */ |
10 | ||
11 | #ifndef lint | |
3dd3a9e5 | 12 | static char sccsid[] = "@(#)xx.c 3.6 (Berkeley) %G%"; |
a8577ffd EW |
13 | #endif /* not lint */ |
14 | ||
15 | #include "ww.h" | |
16 | #include "xx.h" | |
17 | #include "tt.h" | |
18 | ||
19 | xxinit() | |
20 | { | |
21 | if (ttinit() < 0) | |
22 | return -1; | |
23 | xxbufsize = tt.tt_nrow * tt.tt_ncol * 2; | |
17f96a0f EW |
24 | /* ccinit may choose to change xxbufsize */ |
25 | if (tt.tt_ntoken > 0 && ccinit() < 0) | |
0ab446d2 | 26 | return -1; |
a8577ffd EW |
27 | xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf); |
28 | if (xxbuf == 0) { | |
29 | wwerrno = WWE_NOMEM; | |
30 | return -1; | |
31 | } | |
32 | xxbufp = xxbuf; | |
33 | xxbufe = xxbuf + xxbufsize; | |
a8577ffd EW |
34 | return 0; |
35 | } | |
36 | ||
37 | xxstart() | |
38 | { | |
39 | (*tt.tt_start)(); | |
40 | if (tt.tt_ntoken > 0) | |
17f96a0f | 41 | ccstart(); |
a8577ffd EW |
42 | xxreset(); /* might be a restart */ |
43 | } | |
44 | ||
45 | xxend() | |
46 | { | |
47 | if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1) | |
48 | /* tt.tt_setscroll is known to be defined */ | |
49 | (*tt.tt_setscroll)(0, tt.tt_nrow - 1); | |
a8577ffd EW |
50 | if (tt.tt_modes) |
51 | (*tt.tt_setmodes)(0); | |
52 | if (tt.tt_scroll_down) | |
53 | (*tt.tt_scroll_down)(1); | |
54 | (*tt.tt_move)(tt.tt_nrow - 1, 0); | |
17f96a0f EW |
55 | if (tt.tt_ntoken > 0) |
56 | ccend(); | |
a8577ffd | 57 | (*tt.tt_end)(); |
17f96a0f | 58 | (*tt.tt_flush)(); |
a8577ffd EW |
59 | } |
60 | ||
61 | struct xx * | |
62 | xxalloc() | |
63 | { | |
64 | register struct xx *xp; | |
65 | ||
66 | if (xxbufp > xxbufe) | |
67 | abort(); | |
68 | if ((xp = xx_freelist) == 0) | |
69 | /* XXX can't deal with failure */ | |
70 | xp = (struct xx *) malloc((unsigned) sizeof *xp); | |
71 | else | |
72 | xx_freelist = xp->link; | |
73 | if (xx_head == 0) | |
74 | xx_head = xp; | |
75 | else | |
76 | xx_tail->link = xp; | |
77 | xx_tail = xp; | |
78 | xp->link = 0; | |
79 | return xp; | |
80 | } | |
81 | ||
82 | xxfree(xp) | |
83 | register struct xx *xp; | |
84 | { | |
85 | xp->link = xx_freelist; | |
86 | xx_freelist = xp; | |
87 | } | |
88 | ||
89 | xxmove(row, col) | |
90 | { | |
91 | register struct xx *xp = xx_tail; | |
92 | ||
93 | if (xp == 0 || xp->cmd != xc_move) { | |
94 | xp = xxalloc(); | |
95 | xp->cmd = xc_move; | |
96 | } | |
97 | xp->arg0 = row; | |
98 | xp->arg1 = col; | |
99 | } | |
100 | ||
101 | xxscroll(dir, top, bot) | |
102 | { | |
103 | register struct xx *xp = xx_tail; | |
104 | ||
105 | if (xp != 0 && xp->cmd == xc_scroll && | |
106 | xp->arg1 == top && xp->arg2 == bot && | |
107 | (xp->arg0 < 0 && dir < 0 || xp->arg0 > 0 && dir > 0)) { | |
108 | xp->arg0 += dir; | |
109 | return; | |
110 | } | |
111 | xp = xxalloc(); | |
112 | xp->cmd = xc_scroll; | |
113 | xp->arg0 = dir; | |
114 | xp->arg1 = top; | |
115 | xp->arg2 = bot; | |
116 | } | |
117 | ||
d9375810 EW |
118 | xxinschar(row, col, c, m) |
119 | { | |
120 | register struct xx *xp; | |
121 | ||
122 | xp = xxalloc(); | |
123 | xp->cmd = xc_inschar; | |
124 | xp->arg0 = row; | |
125 | xp->arg1 = col; | |
126 | xp->arg2 = c; | |
127 | xp->arg3 = m; | |
128 | } | |
129 | ||
130 | xxinsspace(row, col) | |
a8577ffd EW |
131 | { |
132 | register struct xx *xp = xx_tail; | |
d9375810 EW |
133 | |
134 | if (xp != 0 && xp->cmd == xc_insspace && xp->arg0 == row && | |
135 | col >= xp->arg1 && col <= xp->arg1 + xp->arg2) { | |
136 | xp->arg2++; | |
a8577ffd EW |
137 | return; |
138 | } | |
139 | xp = xxalloc(); | |
d9375810 | 140 | xp->cmd = xc_insspace; |
a8577ffd EW |
141 | xp->arg0 = row; |
142 | xp->arg1 = col; | |
143 | xp->arg2 = 1; | |
a8577ffd EW |
144 | } |
145 | ||
146 | xxdelchar(row, col) | |
147 | { | |
148 | register struct xx *xp = xx_tail; | |
149 | ||
150 | if (xp != 0 && xp->cmd == xc_delchar && | |
151 | xp->arg0 == row && xp->arg1 == col) { | |
152 | xp->arg2++; | |
153 | return; | |
154 | } | |
155 | xp = xxalloc(); | |
156 | xp->cmd = xc_delchar; | |
157 | xp->arg0 = row; | |
158 | xp->arg1 = col; | |
159 | xp->arg2 = 1; | |
160 | } | |
161 | ||
162 | xxclear() | |
163 | { | |
164 | register struct xx *xp; | |
165 | ||
166 | xxreset(); | |
167 | xp = xxalloc(); | |
168 | xp->cmd = xc_clear; | |
169 | } | |
170 | ||
171 | xxclreos(row, col) | |
172 | { | |
173 | register struct xx *xp = xxalloc(); | |
174 | ||
175 | xp->cmd = xc_clreos; | |
176 | xp->arg0 = row; | |
177 | xp->arg1 = col; | |
178 | } | |
179 | ||
180 | xxclreol(row, col) | |
181 | { | |
182 | register struct xx *xp = xxalloc(); | |
183 | ||
184 | xp->cmd = xc_clreol; | |
185 | xp->arg0 = row; | |
186 | xp->arg1 = col; | |
187 | } | |
188 | ||
189 | xxwrite(row, col, p, n, m) | |
190 | char *p; | |
191 | { | |
192 | register struct xx *xp; | |
193 | ||
0ab446d2 | 194 | if (xxbufp + n + 1 > xxbufe) |
a8577ffd EW |
195 | xxflush(0); |
196 | xp = xxalloc(); | |
197 | xp->cmd = xc_write; | |
198 | xp->arg0 = row; | |
199 | xp->arg1 = col; | |
200 | xp->arg2 = n; | |
201 | xp->arg3 = m; | |
202 | xp->buf = xxbufp; | |
203 | bcopy(p, xxbufp, n); | |
204 | xxbufp += n; | |
0ab446d2 | 205 | *xxbufp++ = char_sep; |
a8577ffd EW |
206 | } |
207 | ||
208 | xxreset() | |
209 | { | |
210 | register struct xx *xp, *xq; | |
211 | ||
212 | for (xp = xx_head; xp != 0; xp = xq) { | |
213 | xq = xp->link; | |
214 | xxfree(xp); | |
215 | } | |
216 | xx_tail = xx_head = 0; | |
217 | xxbufp = xxbuf; | |
a8577ffd | 218 | } |