Git 1.7.2
[git/git.git] / userdiff.c
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CommitLineData
1#include "cache.h"
2#include "userdiff.h"
3#include "cache.h"
4#include "attr.h"
5
6static struct userdiff_driver *drivers;
7static int ndrivers;
8static int drivers_alloc;
9
10#define PATTERNS(name, pattern, word_regex) \
11 { name, NULL, -1, { pattern, REG_EXTENDED }, word_regex }
12static struct userdiff_driver builtin_drivers[] = {
13PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
14 "[^<>= \t]+|[^[:space:]]|[\x80-\xff]+"),
15PATTERNS("java",
16 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
17 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
18 /* -- */
19 "[a-zA-Z_][a-zA-Z0-9_]*"
20 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
21 "|[-+*/<>%&^|=!]="
22 "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"
23 "|[^[:space:]]|[\x80-\xff]+"),
24PATTERNS("objc",
25 /* Negate C statements that can look like functions */
26 "!^[ \t]*(do|for|if|else|return|switch|while)\n"
27 /* Objective-C methods */
28 "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
29 /* C functions */
30 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
31 /* Objective-C class/protocol definitions */
32 "^(@(implementation|interface|protocol)[ \t].*)$",
33 /* -- */
34 "[a-zA-Z_][a-zA-Z0-9_]*"
35 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
36 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
37 "|[^[:space:]]|[\x80-\xff]+"),
38PATTERNS("pascal",
39 "^((procedure|function|constructor|destructor|interface|"
40 "implementation|initialization|finalization)[ \t]*.*)$"
41 "\n"
42 "^(.*=[ \t]*(class|record).*)$",
43 /* -- */
44 "[a-zA-Z_][a-zA-Z0-9_]*"
45 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
46 "|<>|<=|>=|:=|\\.\\."
47 "|[^[:space:]]|[\x80-\xff]+"),
48PATTERNS("php",
49 "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
50 "^[\t ]*(class.*)$",
51 /* -- */
52 "[a-zA-Z_][a-zA-Z0-9_]*"
53 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
54 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"
55 "|[^[:space:]]|[\x80-\xff]+"),
56PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
57 /* -- */
58 "[a-zA-Z_][a-zA-Z0-9_]*"
59 "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
60 "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"
61 "|[^[:space:]|[\x80-\xff]+"),
62 /* -- */
63PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
64 /* -- */
65 "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
66 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
67 "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"
68 "|[^[:space:]|[\x80-\xff]+"),
69PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
70 "[={}\"]|[^={}\" \t]+"),
71PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
72 "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+|[^[:space:]]"),
73PATTERNS("cpp",
74 /* Jump targets or access declarations */
75 "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:.*$\n"
76 /* C/++ functions/methods at top level */
77 "^([A-Za-z_][A-Za-z_0-9]*([ \t]+[A-Za-z_][A-Za-z_0-9]*([ \t]*::[ \t]*[^[:space:]]+)?){1,}[ \t]*\\([^;]*)$\n"
78 /* compound type at top level */
79 "^((struct|class|enum)[^;]*)$",
80 /* -- */
81 "[a-zA-Z_][a-zA-Z0-9_]*"
82 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
83 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
84 "|[^[:space:]]|[\x80-\xff]+"),
85{ "default", NULL, -1, { NULL, 0 } },
86};
87#undef PATTERNS
88
89static struct userdiff_driver driver_true = {
90 "diff=true",
91 NULL,
92 0,
93 { NULL, 0 }
94};
95
96static struct userdiff_driver driver_false = {
97 "!diff",
98 NULL,
99 1,
100 { NULL, 0 }
101};
102
103static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
104{
105 int i;
106 for (i = 0; i < ndrivers; i++) {
107 struct userdiff_driver *drv = drivers + i;
108 if (!strncmp(drv->name, k, len) && !drv->name[len])
109 return drv;
110 }
111 for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
112 struct userdiff_driver *drv = builtin_drivers + i;
113 if (!strncmp(drv->name, k, len) && !drv->name[len])
114 return drv;
115 }
116 return NULL;
117}
118
119static struct userdiff_driver *parse_driver(const char *var,
120 const char *value, const char *type)
121{
122 struct userdiff_driver *drv;
123 const char *dot;
124 const char *name;
125 int namelen;
126
127 if (prefixcmp(var, "diff."))
128 return NULL;
129 dot = strrchr(var, '.');
130 if (dot == var + 4)
131 return NULL;
132 if (strcmp(type, dot+1))
133 return NULL;
134
135 name = var + 5;
136 namelen = dot - name;
137 drv = userdiff_find_by_namelen(name, namelen);
138 if (!drv) {
139 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
140 drv = &drivers[ndrivers++];
141 memset(drv, 0, sizeof(*drv));
142 drv->name = xmemdupz(name, namelen);
143 drv->binary = -1;
144 }
145 return drv;
146}
147
148static int parse_funcname(struct userdiff_funcname *f, const char *k,
149 const char *v, int cflags)
150{
151 if (git_config_string(&f->pattern, k, v) < 0)
152 return -1;
153 f->cflags = cflags;
154 return 1;
155}
156
157static int parse_string(const char **d, const char *k, const char *v)
158{
159 if (git_config_string(d, k, v) < 0)
160 return -1;
161 return 1;
162}
163
164static int parse_tristate(int *b, const char *k, const char *v)
165{
166 if (v && !strcasecmp(v, "auto"))
167 *b = -1;
168 else
169 *b = git_config_bool(k, v);
170 return 1;
171}
172
173static int parse_bool(int *b, const char *k, const char *v)
174{
175 *b = git_config_bool(k, v);
176 return 1;
177}
178
179int userdiff_config(const char *k, const char *v)
180{
181 struct userdiff_driver *drv;
182
183 if ((drv = parse_driver(k, v, "funcname")))
184 return parse_funcname(&drv->funcname, k, v, 0);
185 if ((drv = parse_driver(k, v, "xfuncname")))
186 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
187 if ((drv = parse_driver(k, v, "binary")))
188 return parse_tristate(&drv->binary, k, v);
189 if ((drv = parse_driver(k, v, "command")))
190 return parse_string(&drv->external, k, v);
191 if ((drv = parse_driver(k, v, "textconv")))
192 return parse_string(&drv->textconv, k, v);
193 if ((drv = parse_driver(k, v, "cachetextconv")))
194 return parse_bool(&drv->textconv_want_cache, k, v);
195 if ((drv = parse_driver(k, v, "wordregex")))
196 return parse_string(&drv->word_regex, k, v);
197
198 return 0;
199}
200
201struct userdiff_driver *userdiff_find_by_name(const char *name) {
202 int len = strlen(name);
203 return userdiff_find_by_namelen(name, len);
204}
205
206struct userdiff_driver *userdiff_find_by_path(const char *path)
207{
208 static struct git_attr *attr;
209 struct git_attr_check check;
210
211 if (!attr)
212 attr = git_attr("diff");
213 check.attr = attr;
214
215 if (!path)
216 return NULL;
217 if (git_checkattr(path, 1, &check))
218 return NULL;
219
220 if (ATTR_TRUE(check.value))
221 return &driver_true;
222 if (ATTR_FALSE(check.value))
223 return &driver_false;
224 if (ATTR_UNSET(check.value))
225 return NULL;
226 return userdiff_find_by_name(check.value);
227}