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
|
/* Copyright (C) 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include "archive.h"
int templateRender(
FILE *file, const char *template,
const struct Variable *vars, EscapeFn *escape
) {
for (bool subst = false; *template; subst ^= true) {
size_t len = strcspn(template, "[]");
if (subst) {
const char *value = NULL;
for (const struct Variable *var = vars; var->name; ++var) {
if (strlen(var->name) != len) continue;
if (strncmp(var->name, template, len)) continue;
value = var->value;
break;
}
if (!value) {
errx(
EX_SOFTWARE, "no value for template variable %.*s",
(int)len, template
);
}
int error = escape(file, value);
if (error) return error;
} else {
size_t n = fwrite(template, len, 1, file);
if (!n) return -1;
}
template += len;
if (*template) template++;
}
return 0;
}
|