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1 | #include "cache.h" | |
2 | #include "userdiff.h" | |
3 | #include "cache.h" | |
4 | #include "attr.h" | |
5 | ||
6 | static struct userdiff_driver *drivers; | |
7 | static int ndrivers; | |
8 | static int drivers_alloc; | |
9 | ||
10 | #define PATTERNS(name, pattern, word_regex) \ | |
11 | { name, NULL, -1, { pattern, REG_EXTENDED }, \ | |
12 | word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" } | |
13 | #define IPATTERN(name, pattern, word_regex) \ | |
14 | { name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \ | |
15 | word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" } | |
16 | static struct userdiff_driver builtin_drivers[] = { | |
17 | IPATTERN("fortran", | |
18 | "!^([C*]|[ \t]*!)\n" | |
19 | "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n" | |
20 | "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA" | |
21 | "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$", | |
22 | /* -- */ | |
23 | "[a-zA-Z][a-zA-Z0-9_]*" | |
24 | "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\." | |
25 | /* numbers and format statements like 2E14.4, or ES12.6, 9X. | |
26 | * Don't worry about format statements without leading digits since | |
27 | * they would have been matched above as a variable anyway. */ | |
28 | "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?" | |
29 | "|//|\\*\\*|::|[/<>=]="), | |
30 | PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$", | |
31 | "[^<>= \t]+"), | |
32 | PATTERNS("java", | |
33 | "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n" | |
34 | "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$", | |
35 | /* -- */ | |
36 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
37 | "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" | |
38 | "|[-+*/<>%&^|=!]=" | |
39 | "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"), | |
40 | PATTERNS("objc", | |
41 | /* Negate C statements that can look like functions */ | |
42 | "!^[ \t]*(do|for|if|else|return|switch|while)\n" | |
43 | /* Objective-C methods */ | |
44 | "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n" | |
45 | /* C functions */ | |
46 | "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n" | |
47 | /* Objective-C class/protocol definitions */ | |
48 | "^(@(implementation|interface|protocol)[ \t].*)$", | |
49 | /* -- */ | |
50 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
51 | "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" | |
52 | "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"), | |
53 | PATTERNS("pascal", | |
54 | "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|" | |
55 | "implementation|initialization|finalization)[ \t]*.*)$" | |
56 | "\n" | |
57 | "^(.*=[ \t]*(class|record).*)$", | |
58 | /* -- */ | |
59 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
60 | "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+" | |
61 | "|<>|<=|>=|:=|\\.\\."), | |
62 | PATTERNS("perl", | |
63 | "^[ \t]*package .*;\n" | |
64 | "^[ \t]*sub .* \\{\n" | |
65 | "^[A-Z]+ \\{\n" /* BEGIN, END, ... */ | |
66 | "^=head[0-9] ", /* POD */ | |
67 | /* -- */ | |
68 | "[[:alpha:]_'][[:alnum:]_']*" | |
69 | "|0[xb]?[0-9a-fA-F_]*" | |
70 | /* taking care not to interpret 3..5 as (3.)(.5) */ | |
71 | "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?" | |
72 | "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::" | |
73 | "|&&=|\\|\\|=|//=|\\*\\*=" | |
74 | "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?" | |
75 | "|[-+*/%.^&<>=!|]=" | |
76 | "|=~|!~" | |
77 | "|<<|<>|<=>|>>"), | |
78 | PATTERNS("php", | |
79 | "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n" | |
80 | "^[\t ]*(class.*)$", | |
81 | /* -- */ | |
82 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
83 | "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+" | |
84 | "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"), | |
85 | PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$", | |
86 | /* -- */ | |
87 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
88 | "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?" | |
89 | "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"), | |
90 | /* -- */ | |
91 | PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$", | |
92 | /* -- */ | |
93 | "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*" | |
94 | "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?." | |
95 | "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"), | |
96 | PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$", | |
97 | "[={}\"]|[^={}\" \t]+"), | |
98 | PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$", | |
99 | "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"), | |
100 | PATTERNS("cpp", | |
101 | /* Jump targets or access declarations */ | |
102 | "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:.*$\n" | |
103 | /* C/++ functions/methods at top level */ | |
104 | "^([A-Za-z_][A-Za-z_0-9]*([ \t]+[A-Za-z_][A-Za-z_0-9]*([ \t]*::[ \t]*[^[:space:]]+)?){1,}[ \t]*\\([^;]*)$\n" | |
105 | /* compound type at top level */ | |
106 | "^((struct|class|enum)[^;]*)$", | |
107 | /* -- */ | |
108 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
109 | "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" | |
110 | "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"), | |
111 | PATTERNS("csharp", | |
112 | /* Keywords */ | |
113 | "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n" | |
114 | /* Methods and constructors */ | |
115 | "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n" | |
116 | /* Properties */ | |
117 | "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n" | |
118 | /* Type definitions */ | |
119 | "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n" | |
120 | /* Namespace */ | |
121 | "^[ \t]*(namespace[ \t]+.*)$", | |
122 | /* -- */ | |
123 | "[a-zA-Z_][a-zA-Z0-9_]*" | |
124 | "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" | |
125 | "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"), | |
126 | { "default", NULL, -1, { NULL, 0 } }, | |
127 | }; | |
128 | #undef PATTERNS | |
129 | #undef IPATTERN | |
130 | ||
131 | static struct userdiff_driver driver_true = { | |
132 | "diff=true", | |
133 | NULL, | |
134 | 0, | |
135 | { NULL, 0 } | |
136 | }; | |
137 | ||
138 | static struct userdiff_driver driver_false = { | |
139 | "!diff", | |
140 | NULL, | |
141 | 1, | |
142 | { NULL, 0 } | |
143 | }; | |
144 | ||
145 | static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len) | |
146 | { | |
147 | int i; | |
148 | for (i = 0; i < ndrivers; i++) { | |
149 | struct userdiff_driver *drv = drivers + i; | |
150 | if (!strncmp(drv->name, k, len) && !drv->name[len]) | |
151 | return drv; | |
152 | } | |
153 | for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) { | |
154 | struct userdiff_driver *drv = builtin_drivers + i; | |
155 | if (!strncmp(drv->name, k, len) && !drv->name[len]) | |
156 | return drv; | |
157 | } | |
158 | return NULL; | |
159 | } | |
160 | ||
161 | static struct userdiff_driver *parse_driver(const char *var, | |
162 | const char *value, const char *type) | |
163 | { | |
164 | struct userdiff_driver *drv; | |
165 | const char *dot; | |
166 | const char *name; | |
167 | int namelen; | |
168 | ||
169 | if (prefixcmp(var, "diff.")) | |
170 | return NULL; | |
171 | dot = strrchr(var, '.'); | |
172 | if (dot == var + 4) | |
173 | return NULL; | |
174 | if (strcmp(type, dot+1)) | |
175 | return NULL; | |
176 | ||
177 | name = var + 5; | |
178 | namelen = dot - name; | |
179 | drv = userdiff_find_by_namelen(name, namelen); | |
180 | if (!drv) { | |
181 | ALLOC_GROW(drivers, ndrivers+1, drivers_alloc); | |
182 | drv = &drivers[ndrivers++]; | |
183 | memset(drv, 0, sizeof(*drv)); | |
184 | drv->name = xmemdupz(name, namelen); | |
185 | drv->binary = -1; | |
186 | } | |
187 | return drv; | |
188 | } | |
189 | ||
190 | static int parse_funcname(struct userdiff_funcname *f, const char *k, | |
191 | const char *v, int cflags) | |
192 | { | |
193 | if (git_config_string(&f->pattern, k, v) < 0) | |
194 | return -1; | |
195 | f->cflags = cflags; | |
196 | return 1; | |
197 | } | |
198 | ||
199 | static int parse_string(const char **d, const char *k, const char *v) | |
200 | { | |
201 | if (git_config_string(d, k, v) < 0) | |
202 | return -1; | |
203 | return 1; | |
204 | } | |
205 | ||
206 | static int parse_tristate(int *b, const char *k, const char *v) | |
207 | { | |
208 | if (v && !strcasecmp(v, "auto")) | |
209 | *b = -1; | |
210 | else | |
211 | *b = git_config_bool(k, v); | |
212 | return 1; | |
213 | } | |
214 | ||
215 | static int parse_bool(int *b, const char *k, const char *v) | |
216 | { | |
217 | *b = git_config_bool(k, v); | |
218 | return 1; | |
219 | } | |
220 | ||
221 | int userdiff_config(const char *k, const char *v) | |
222 | { | |
223 | struct userdiff_driver *drv; | |
224 | ||
225 | if ((drv = parse_driver(k, v, "funcname"))) | |
226 | return parse_funcname(&drv->funcname, k, v, 0); | |
227 | if ((drv = parse_driver(k, v, "xfuncname"))) | |
228 | return parse_funcname(&drv->funcname, k, v, REG_EXTENDED); | |
229 | if ((drv = parse_driver(k, v, "binary"))) | |
230 | return parse_tristate(&drv->binary, k, v); | |
231 | if ((drv = parse_driver(k, v, "command"))) | |
232 | return parse_string(&drv->external, k, v); | |
233 | if ((drv = parse_driver(k, v, "textconv"))) | |
234 | return parse_string(&drv->textconv, k, v); | |
235 | if ((drv = parse_driver(k, v, "cachetextconv"))) | |
236 | return parse_bool(&drv->textconv_want_cache, k, v); | |
237 | if ((drv = parse_driver(k, v, "wordregex"))) | |
238 | return parse_string(&drv->word_regex, k, v); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | struct userdiff_driver *userdiff_find_by_name(const char *name) { | |
244 | int len = strlen(name); | |
245 | return userdiff_find_by_namelen(name, len); | |
246 | } | |
247 | ||
248 | struct userdiff_driver *userdiff_find_by_path(const char *path) | |
249 | { | |
250 | static struct git_attr *attr; | |
251 | struct git_attr_check check; | |
252 | ||
253 | if (!attr) | |
254 | attr = git_attr("diff"); | |
255 | check.attr = attr; | |
256 | ||
257 | if (!path) | |
258 | return NULL; | |
259 | if (git_checkattr(path, 1, &check)) | |
260 | return NULL; | |
261 | ||
262 | if (ATTR_TRUE(check.value)) | |
263 | return &driver_true; | |
264 | if (ATTR_FALSE(check.value)) | |
265 | return &driver_false; | |
266 | if (ATTR_UNSET(check.value)) | |
267 | return NULL; | |
268 | return userdiff_find_by_name(check.value); | |
269 | } |