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be58e70d JK |
1 | #include "userdiff.h" |
2 | #include "cache.h" | |
3 | #include "attr.h" | |
4 | ||
5 | static struct userdiff_driver *drivers; | |
6 | static int ndrivers; | |
7 | static int drivers_alloc; | |
8 | ||
9 | #define FUNCNAME(name, pattern) \ | |
122aa6f9 | 10 | { name, NULL, -1, { pattern, REG_EXTENDED } } |
be58e70d JK |
11 | static struct userdiff_driver builtin_drivers[] = { |
12 | FUNCNAME("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$"), | |
13 | FUNCNAME("java", | |
14 | "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n" | |
15 | "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$"), | |
16 | FUNCNAME("objc", | |
17 | /* Negate C statements that can look like functions */ | |
18 | "!^[ \t]*(do|for|if|else|return|switch|while)\n" | |
19 | /* Objective-C methods */ | |
20 | "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n" | |
21 | /* C functions */ | |
22 | "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$\n" | |
23 | /* Objective-C class/protocol definitions */ | |
24 | "^(@(implementation|interface|protocol)[ \t].*)$"), | |
25 | FUNCNAME("pascal", | |
26 | "^((procedure|function|constructor|destructor|interface|" | |
27 | "implementation|initialization|finalization)[ \t]*.*)$" | |
28 | "\n" | |
29 | "^(.*=[ \t]*(class|record).*)$"), | |
30 | FUNCNAME("php", "^[\t ]*((function|class).*)"), | |
31 | FUNCNAME("python", "^[ \t]*((class|def)[ \t].*)$"), | |
32 | FUNCNAME("ruby", "^[ \t]*((class|module|def)[ \t].*)$"), | |
33 | FUNCNAME("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$"), | |
34 | FUNCNAME("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$"), | |
122aa6f9 | 35 | { "default", NULL, -1, { NULL, 0 } }, |
be58e70d JK |
36 | }; |
37 | #undef FUNCNAME | |
38 | ||
39 | static struct userdiff_driver driver_true = { | |
40 | "diff=true", | |
41 | NULL, | |
122aa6f9 | 42 | 0, |
be58e70d JK |
43 | { NULL, 0 } |
44 | }; | |
be58e70d JK |
45 | |
46 | static struct userdiff_driver driver_false = { | |
47 | "!diff", | |
48 | NULL, | |
122aa6f9 | 49 | 1, |
be58e70d JK |
50 | { NULL, 0 } |
51 | }; | |
be58e70d JK |
52 | |
53 | static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len) | |
54 | { | |
55 | int i; | |
56 | for (i = 0; i < ndrivers; i++) { | |
57 | struct userdiff_driver *drv = drivers + i; | |
58 | if (!strncmp(drv->name, k, len) && !drv->name[len]) | |
59 | return drv; | |
60 | } | |
61 | for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) { | |
62 | struct userdiff_driver *drv = builtin_drivers + i; | |
63 | if (!strncmp(drv->name, k, len) && !drv->name[len]) | |
64 | return drv; | |
65 | } | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | static struct userdiff_driver *parse_driver(const char *var, | |
70 | const char *value, const char *type) | |
71 | { | |
72 | struct userdiff_driver *drv; | |
73 | const char *dot; | |
74 | const char *name; | |
75 | int namelen; | |
76 | ||
77 | if (prefixcmp(var, "diff.")) | |
78 | return NULL; | |
79 | dot = strrchr(var, '.'); | |
80 | if (dot == var + 4) | |
81 | return NULL; | |
82 | if (strcmp(type, dot+1)) | |
83 | return NULL; | |
84 | ||
85 | name = var + 5; | |
86 | namelen = dot - name; | |
87 | drv = userdiff_find_by_namelen(name, namelen); | |
88 | if (!drv) { | |
89 | ALLOC_GROW(drivers, ndrivers+1, drivers_alloc); | |
90 | drv = &drivers[ndrivers++]; | |
91 | memset(drv, 0, sizeof(*drv)); | |
92 | drv->name = xmemdupz(name, namelen); | |
122aa6f9 | 93 | drv->binary = -1; |
be58e70d JK |
94 | } |
95 | return drv; | |
96 | } | |
97 | ||
98 | static int parse_funcname(struct userdiff_funcname *f, const char *k, | |
99 | const char *v, int cflags) | |
100 | { | |
101 | if (git_config_string(&f->pattern, k, v) < 0) | |
102 | return -1; | |
103 | f->cflags = cflags; | |
104 | return 1; | |
105 | } | |
106 | ||
107 | static int parse_string(const char **d, const char *k, const char *v) | |
108 | { | |
109 | if (git_config_string(d, k, v) < 0) | |
110 | return -1; | |
111 | return 1; | |
112 | } | |
113 | ||
122aa6f9 JK |
114 | static int parse_tristate(int *b, const char *k, const char *v) |
115 | { | |
116 | if (v && !strcasecmp(v, "auto")) | |
117 | *b = -1; | |
118 | else | |
119 | *b = git_config_bool(k, v); | |
120 | return 1; | |
121 | } | |
122 | ||
be58e70d JK |
123 | int userdiff_config_basic(const char *k, const char *v) |
124 | { | |
125 | struct userdiff_driver *drv; | |
126 | ||
127 | if ((drv = parse_driver(k, v, "funcname"))) | |
128 | return parse_funcname(&drv->funcname, k, v, 0); | |
129 | if ((drv = parse_driver(k, v, "xfuncname"))) | |
130 | return parse_funcname(&drv->funcname, k, v, REG_EXTENDED); | |
122aa6f9 JK |
131 | if ((drv = parse_driver(k, v, "binary"))) |
132 | return parse_tristate(&drv->binary, k, v); | |
be58e70d JK |
133 | |
134 | return 0; | |
135 | } | |
136 | ||
137 | int userdiff_config_porcelain(const char *k, const char *v) | |
138 | { | |
139 | struct userdiff_driver *drv; | |
140 | ||
141 | if ((drv = parse_driver(k, v, "command"))) | |
142 | return parse_string(&drv->external, k, v); | |
9cb92c39 JK |
143 | if ((drv = parse_driver(k, v, "textconv"))) |
144 | return parse_string(&drv->textconv, k, v); | |
be58e70d JK |
145 | |
146 | return 0; | |
147 | } | |
148 | ||
149 | struct userdiff_driver *userdiff_find_by_name(const char *name) { | |
150 | int len = strlen(name); | |
151 | return userdiff_find_by_namelen(name, len); | |
152 | } | |
153 | ||
154 | struct userdiff_driver *userdiff_find_by_path(const char *path) | |
155 | { | |
156 | static struct git_attr *attr; | |
157 | struct git_attr_check check; | |
158 | ||
159 | if (!attr) | |
160 | attr = git_attr("diff", 4); | |
161 | check.attr = attr; | |
162 | ||
163 | if (!path) | |
164 | return NULL; | |
165 | if (git_checkattr(path, 1, &check)) | |
166 | return NULL; | |
167 | ||
168 | if (ATTR_TRUE(check.value)) | |
169 | return &driver_true; | |
170 | if (ATTR_FALSE(check.value)) | |
171 | return &driver_false; | |
172 | if (ATTR_UNSET(check.value)) | |
173 | return NULL; | |
174 | return userdiff_find_by_name(check.value); | |
175 | } |