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
185
186
187
188
189
190
191
192
|
#include <stdbool.h>
#include <stddef.h> // size_t
#include "sok.h"
#define UNUSED(a) ((void) (a))
#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
#define CASE_DIGIT \
case '0': \
case '1': \
case '2': \
case '3': \
case '4': \
case '5': \
case '6': \
case '7': \
case '8': \
case '9':
void
sok_level_parser_init(
sok_level_parser_t * const parser,
const sok_level_parser_cbs_t * const cbs,
void * const user_data
) {
parser->cbs = cbs;
parser->user_data = user_data;
}
bool
sok_level_parser_parse(
sok_level_parser_t * const parser,
const char * const buf,
const size_t buf_len
) {
sok_pos_t size = { .x = 0, .y = 0 };
for (size_t i = 0, ofs = 0, w = 0; i < buf_len; i++) {
if (buf[i] == '|') {
if (w > size.x) {
size.x = w;
}
// reset column position, increment row count
w = 0;
size.y++;
} else if (IS_DIGIT(buf[i])) {
ofs = 10 * ofs + (buf[i] - '0');
} else if (ofs > 0) {
w += ofs;
ofs = 0;
} else {
w++;
}
}
// increment row count
size.y++;
// emit level size
if (
parser->cbs->on_size &&
!parser->cbs->on_size(parser, size)
) {
// return failure
return false;
}
sok_pos_t pos = { 0, 0 };
for (size_t i = 0, ofs = 0; i < buf_len; i++) {
switch (buf[i]) {
case '|':
// new line
pos.x = 0;
pos.y++;
break;
CASE_DIGIT
ofs = 10 * ofs + (buf[i] - '0');
break;
case '-':
case '_':
case ' ':
// advance
pos.x += (ofs > 0) ? ofs : 1;
break;
case '+':
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// emit home
if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
break;
case '@':
// emit home
if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
break;
case '#':
for (size_t j = (ofs > 0) ? ofs : 1; j; j--) {
// emit wall
if (parser->cbs->on_wall && !parser->cbs->on_wall(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '*':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// emit box
if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '.':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '$':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit box
if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
default:
// emit junk
if (parser->cbs->on_junk && !parser->cbs->on_junk(parser, i, buf[i])) {
// return failure
return false;
}
// return failure
return false;
}
}
// return success
return true;
}
|
