diff --check: minor fixups
[git/git.git] / ws.c
CommitLineData
cf1b7869
JH
1/*
2 * Whitespace rules
3 *
4 * Copyright (c) 2007 Junio C Hamano
5 */
6
7#include "cache.h"
8#include "attr.h"
9
10static struct whitespace_rule {
11 const char *rule_name;
12 unsigned rule_bits;
13} whitespace_rule_names[] = {
14 { "trailing-space", WS_TRAILING_SPACE },
15 { "space-before-tab", WS_SPACE_BEFORE_TAB },
16 { "indent-with-non-tab", WS_INDENT_WITH_NON_TAB },
17};
18
19unsigned parse_whitespace_rule(const char *string)
20{
21 unsigned rule = WS_DEFAULT_RULE;
22
23 while (string) {
24 int i;
25 size_t len;
26 const char *ep;
27 int negated = 0;
28
29 string = string + strspn(string, ", \t\n\r");
30 ep = strchr(string, ',');
31 if (!ep)
32 len = strlen(string);
33 else
34 len = ep - string;
35
36 if (*string == '-') {
37 negated = 1;
38 string++;
39 len--;
40 }
41 if (!len)
42 break;
43 for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++) {
44 if (strncmp(whitespace_rule_names[i].rule_name,
45 string, len))
46 continue;
47 if (negated)
48 rule &= ~whitespace_rule_names[i].rule_bits;
49 else
50 rule |= whitespace_rule_names[i].rule_bits;
51 break;
52 }
53 string = ep;
54 }
55 return rule;
56}
57
58static void setup_whitespace_attr_check(struct git_attr_check *check)
59{
60 static struct git_attr *attr_whitespace;
61
62 if (!attr_whitespace)
63 attr_whitespace = git_attr("whitespace", 10);
64 check[0].attr = attr_whitespace;
65}
66
67unsigned whitespace_rule(const char *pathname)
68{
69 struct git_attr_check attr_whitespace_rule;
70
71 setup_whitespace_attr_check(&attr_whitespace_rule);
72 if (!git_checkattr(pathname, 1, &attr_whitespace_rule)) {
73 const char *value;
74
75 value = attr_whitespace_rule.value;
76 if (ATTR_TRUE(value)) {
77 /* true (whitespace) */
78 unsigned all_rule = 0;
79 int i;
80 for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++)
81 all_rule |= whitespace_rule_names[i].rule_bits;
82 return all_rule;
83 } else if (ATTR_FALSE(value)) {
84 /* false (-whitespace) */
85 return 0;
86 } else if (ATTR_UNSET(value)) {
87 /* reset to default (!whitespace) */
88 return whitespace_rule_cfg;
89 } else {
90 /* string */
91 return parse_whitespace_rule(value);
92 }
93 } else {
94 return whitespace_rule_cfg;
95 }
96}