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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/*
* Copyright © 2022 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../intdefs.h"
#include "../kv.h"
#include "../noreturn.h"
#include "../os.h"
#include "vec.h"
#ifdef _WIN32
#define fS "S"
#else
#define fS "s"
#endif
static noreturn die(const char *s) {
fprintf(stderr, "mkgamedata: %s\n", s);
exit(100);
}
/*
* We keep the gamedata KV format as simple as possible. Default values are
* specified as direct key-value pairs:
*
* <varname> <expr>
*
* Game- or engine-specific values are set using blocks:
*
* <varname> { <gametype> <expr> <gametype> <expr> ... [default <expr>] }
*
* The most complicated it can get is if conditionals are nested, which
* basically translates directly into nested ifs:
* <varname> { <gametype> { <gametype> <expr> <gametype> <expr> } }
* [however many entries...]
*
* If that doesn't make sense, just look at one of the existing data files and
* then it should be obvious. :^)
*
* Note: if `default` isn't given in a conditional block, that piece of gamedata
* is considered unavailable and modules that use it won't get initialised/used.
*/
struct vec_ent VEC(struct ent *);
struct ent {
const char *name; // (or condition tag, in a child node)
const char *defexpr;
struct vec_ent subents;
struct ent *parent; // to back up a level during parse
};
// root only contains subents list but it's easier to use the same struct
static struct ent root = {0};
struct parsestate {
const os_char *filename;
struct kv_parser *parser;
struct ent *curent; // current ent lol
bool haddefault; // blegh;
};
static noreturn badparse(struct parsestate *state, const char *e) {
fprintf(stderr, "mkgamedata: %" fS ":%d:%d: parse error: %s",
state->filename, state->parser->line, state->parser->col, e);
exit(1);
}
static void kv_cb(enum kv_token type, const char *p, uint len, void *ctxt) {
struct parsestate *state = ctxt;
switch (type) {
case KV_IDENT: case KV_IDENT_QUOTED:;
if (len == 7 && !memcmp(p, "default", 7)) { // special case!
if (state->curent == &root) {
badparse(state, "unexpected default keyword at top level");
}
struct ent *e = state->curent;
if (e->defexpr) {
badparse(state, "multiple default keywords");
}
state->haddefault = true;
break;
}
state->haddefault = false;
char *k = malloc(len + 1);
if (!k) die("couldn't allocate key string");
// FIXME(?): should check and prevent duplicate keys probably!
// need table.h or something to avoid O(n^2) :)
memcpy(k, p, len); k[len] = '\0';
struct ent *e = malloc(sizeof(*e));
if (!e) die("couldn't allocate memory");
e->name = k;
e->defexpr = 0;
e->subents = (struct vec_ent){0};
if (!vec_push(&state->curent->subents, e)) {
die("couldn't append to array");
}
e->parent = state->curent;
state->curent = e;
break;
case KV_NEST_START:
if (state->haddefault) badparse(state, "default cannot be a block");
break;
case KV_NEST_END:
if (!state->curent->parent) {
badparse(state, "unexpected closing brace");
}
state->curent = state->curent->parent;
break;
case KV_VAL: case KV_VAL_QUOTED:
char *s = malloc(len + 1);
if (!s) die("couldn't allocate value string");
memcpy(s, p, len); s[len] = '\0';
state->curent->defexpr = s;
if (!state->haddefault) {
// a non-default value is just a node that itself only has a
// default value.
state->curent = state->curent->parent;
}
break;
case KV_COND_PREFIX: case KV_COND_SUFFIX:
badparse(state, "unexpected conditional");
}
}
static inline noreturn diewrite(void) { die("couldn't write to file"); }
#define _doindent \
for (int _indent = 0; _indent < indent; ++_indent) { \
if (fputs("\t", out) == -1) diewrite(); \
}
#define _(x) \
if (fprintf(out, "%s\n", x) < 0) diewrite();
#define _i(x) _doindent _(x)
#define F(f, ...) \
if (fprintf(out, f "\n", __VA_ARGS__) < 0) diewrite();
#define Fi(...) _doindent F(__VA_ARGS__)
#define H() \
_( "/* This file is autogenerated by src/build/mkgamedata.c. DO NOT EDIT! */") \
_( "")
static void decls(FILE *out) {
for (struct ent *const *pp = root.subents.data;
pp - root.subents.data < root.subents.sz; ++pp) {
if ((*pp)->defexpr) {
F( "#define has_%s true", (*pp)->name)
if ((*pp)->subents.sz) {
F( "extern int %s;", (*pp)->name)
}
else {
F( "enum { %s = %s };", (*pp)->name, (*pp)->defexpr)
}
}
else {
F( "extern bool has_%s;", (*pp)->name)
F( "extern int %s;", (*pp)->name)
}
}
}
static void inits(FILE *out, const char *var, struct vec_ent *v, bool needhas,
int indent) {
for (struct ent *const *pp = v->data; pp - v->data < v->sz; ++pp) {
Fi("if (GAMETYPE_MATCHES(%s)) {", (*pp)->name)
bool has = needhas && (*pp)->defexpr;
if (has) {
Fi(" has_%s = true;", var);
}
if ((*pp)->defexpr) {
Fi(" %s = %s;", var, (*pp)->defexpr);
}
inits(out, var, &(*pp)->subents, !has, indent + 1);
_i("}")
}
}
static void defs(FILE *out) {
for (struct ent *const *pp = root.subents.data;
pp - root.subents.data < root.subents.sz; ++pp) {
if ((*pp)->defexpr) {
if ((*pp)->subents.sz) {
F( "int %s = %s;", (*pp)->name, (*pp)->defexpr);
}
}
else {
F( "int %s;", (*pp)->name);
F( "bool has_%s = false;", (*pp)->name);
}
}
_( "")
_( "void gamedata_init(void) {")
for (struct ent *const *pp = root.subents.data;
pp - root.subents.data < root.subents.sz; ++pp) {
inits(out, (*pp)->name, &(*pp)->subents, !(*pp)->defexpr, 1);
}
_( "}")
}
int OS_MAIN(int argc, os_char *argv[]) {
for (++argv; *argv; ++argv) {
int fd = os_open(*argv, O_RDONLY);
if (fd == -1) die("couldn't open file");
struct kv_parser kv = {0};
struct parsestate state = {*argv, &kv, &root};
char buf[1024];
int nread;
while (nread = read(fd, buf, sizeof(buf))) {
if (nread == -1) die("couldn't read file");
if (!kv_parser_feed(&kv, buf, nread, &kv_cb, &state)) goto ep;
}
if (!kv_parser_done(&kv)) {
ep: fprintf(stderr, "mkgamedata: %" fS ":%d:%d: bad syntax: %s\n",
*argv, kv.line, kv.col, kv.errmsg);
exit(1);
}
close(fd);
}
FILE *out = fopen(".build/include/gamedata.gen.h", "wb");
if (!out) die("couldn't open gamedata.gen.h");
H();
decls(out);
out = fopen(".build/include/gamedatainit.gen.h", "wb");
if (!out) die("couldn't open gamedatainit.gen.h");
H();
defs(out);
return 0;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
|
