source/configfile.crev: b86ed822ff (latest)


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

/* configfile.c: parsing of config files
 *
 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see LICENSE.txt for full license text)
 */

#include <git-compat-util.h>
#include "configfile.h"

static int next_char(FILE *f)
{
	int c = fgetc(f);
	if (c == '\r') {
		c = fgetc(f);
		if (c != '\n') {
			ungetc(c, f);
			c = '\r';
		}
	}
	return c;
}

static void skip_line(FILE *f)
{
	int c;

	while ((c = next_char(f)) && c != '\n' && c != EOF)
		;
}

static int read_config_line(FILE *f, struct strbuf *name, struct strbuf *value)
{
	int c;

	strbuf_reset(value);

	for (;;) {
		c = next_char(f);

		// Skip comments and preceding spaces.
		for (;;) {
			if (c == EOF)
				return 0;
			else if (c == '#' || c == ';')
				skip_line(f);
			else if (!isspace(c))
				break;
			c = next_char(f);
		}

		// Read variable name.
		strbuf_reset(name);
		while (c != '=') {
			if (c == EOF)
				return 0;
			// A line without '=' is malformed. Skip it and keep
			// reading so a typo does not drop the rest of the file.
			if (c == '\n')
				break;
			strbuf_addch(name, c);
			c = next_char(f);
		}
		if (c != '=')
			continue;

		// Read variable value.
		c = next_char(f);
		while (c != '\n' && c != EOF) {
			strbuf_addch(value, c);
			c = next_char(f);
		}

		return 1;
	}
}

int parse_configfile(const char *filename, configfile_value_fn fn)
{
	static int nesting;
	struct strbuf name = STRBUF_INIT;
	struct strbuf value = STRBUF_INIT;
	FILE *f;

	/* cancel deeply nested include-commands */
	if (nesting > 8)
		return -1;
	if (!(f = fopen(filename, "r")))
		return -1;
	nesting++;
	while (read_config_line(f, &name, &value))
		fn(name.buf, value.buf);
	nesting--;
	fclose(f);
	strbuf_release(&name);
	strbuf_release(&value);
	return 0;
}