1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
#define _POSIX_C_SOURCE 200112L
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gramscii.h"
static int LONG_STEP;
/* line_t and lineset_t management */
void ensure_line_length(line_t *l, int len){
char *tmp;
if (l->sz < len + 1){
tmp = realloc(l->s, (len+1) * 2 * sizeof(char));
if (tmp == NULL){
fprintf(stderr, "Unable to allocate string\n");
cleanup(1);
}
l->s = tmp;
l->sz = (len + 1) * 2;
}
}
void alloc_line(line_t *l){
char *tmp;
l->sz = WIDTH+1;
tmp = malloc((l->sz) * sizeof(char));
if (tmp == NULL){
fprintf(stderr, "unable to allocate line\n");
cleanup(1);
}
l->s = tmp;
memset(l->s, BG, l->sz);
l->lst = -1;
l->s[0]='\0';
}
void ensure_num_lines(lineset_t *ls, int n){
line_t *tmp;
if (n > ls->sz){
if (ls->sz == 0)
ls->l=NULL;
tmp = realloc(ls->l, (n + LONG_STEP) * sizeof(line_t));
if (tmp == NULL){
fprintf(stderr, "Unable to allocate memory for more lines");
cleanup(1);
}
else {
ls->l = tmp;
while ( ls->sz < n + LONG_STEP){
alloc_line(&(ls->l[ls->sz]));
ls->sz ++;
}
}
}
}
void dump_lines(lineset_t ls, FILE *f){
int i;
for (i=0; i<ls.num ;i++){
fprintf(f, "%s\n", ls.l[i].s);
}
fflush(f);
}
void pad_line_to_length(char *s, int W){
int i;
for (i=strlen(s); i<W; i++){
s[i] = BG;
}
}
/* cut/yank/paste/undo management */
void yank_region(int x1, int y1, int x2, int y2){
int N, W, i;
N = y2 - y1 + 1;
W = x2 - x1 + 1;
ensure_num_lines(&cutbuf, N);
for (i=y1; i<=y2; i++){
ensure_line_length(&(cutbuf.l[i-y1]), W);
memcpy(cutbuf.l[i-y1].s, screen.l[i].s + x1, x2-x1+1);
if (strlen(cutbuf.l[i-y1].s) < W)
pad_line_to_length(cutbuf.l[i-y1].s, W);
cutbuf.l[i-y1].s[W] = '\0';
cutbuf.l[i-y1].n = i;
}
cutbuf.num = N;
#ifdef DEBUG
dump_lines(cutbuf, stderr);
#endif
}
void paste_region(int x1, int y1){
int i, curlen, pastelen;
i = y1;
while( i < HEIGHT && i < y1 + cutbuf.num){
pastelen = strlen(cutbuf.l[i-y1].s);
curlen = strlen(screen.l[i].s);
memcpy(screen.l[i].s + x1, cutbuf.l[i-y1].s, pastelen);
if (curlen <= x1)
/* double-check this line below */
pad_line_to_length(screen.l[i].s + curlen, x1 - curlen);
if (curlen <= x1 + pastelen)
screen.l[i].s[x1 + pastelen] = '\0';
screen.l[i].lst = strlen(screen.l[i].s) - 1;
#ifdef DEBUG
fprintf(stderr, "%d.lst: %d\n", i, screen.l[i].lst);
#endif
i += 1;
modified = 1;
}
redraw();
}
void copy_lines_to_ring(int y1, int y2, int which){
int i, len, idx;
lineset_t *tmp;
if (y1 > y2){
y1 ^= y2;
y2 ^= y1;
y1 ^= y2;
}
if (undo_cur > undo_lst)
undo_cur = undo_lst;
if (which == PRV_STATE){ /* adding a new previous state */
undo_cur += 2;
idx = undo_cur;
}
else
idx = undo_cur + 1;
if (idx >= undo_sz - 1){
tmp = realloc(undo, (undo_sz + 10) * sizeof(lineset_t));
if (tmp == NULL){
fprintf(stderr, "Error allocating undo buffer");
cleanup(1);
}
undo = tmp;
for (i=0; i<10; i++){
undo[undo_sz + i].sz = 0;
undo[undo_sz + i].l = NULL;
undo[undo_sz + i].num = 0;
}
undo_sz += 10;
}
ensure_num_lines(&(undo[idx]), y2 - y1 + 1);
for(i=y1; i<=y2; i++){
len = strlen(screen.l[i].s);
ensure_line_length(&(undo[idx].l[i-y1]), len);
strcpy(undo[idx].l[i-y1].s, screen.l[i].s);
undo[idx].l[i-y1].n = i;
undo[idx].l[i-y1].lst = screen.l[i].lst;
}
undo[idx].num = y2 - y1 + 1;
if (which == PRV_STATE)
undo_lst = undo_cur;
#ifdef DEBUG
fprintf(stderr, "undo_ring: y1: %d y2: %d idx: %d\n", y1, y2, idx);
for(i=0; i<undo[idx].num; i++){
fprintf(stderr, "UU: %d| %s\n", undo[idx].l[i].n, undo[idx].l[i].s);
}
#endif
}
void invalidate_undo(){
if (undo_lst > undo_cur)
undo_lst = undo_cur;
}
|
