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d9bae1a @peff diff: cache textconv output
peff authored
1 #include "cache.h"
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
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
ae3b970 @stephen-smith Change the spelling of "wordregex".
stephen-smith authored
10 #define PATTERNS(name, pattern, word_regex) \
11 { name, NULL, -1, { pattern, REG_EXTENDED }, word_regex }
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
12 static struct userdiff_driver builtin_drivers[] = {
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
13 PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
14 "[^<>= \t]+|[^[:space:]]|[\x80-\xff]+"),
15 PATTERNS("java",
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
16 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
959e2e6 @bonzini avoid exponential regex match for java and objc function names
bonzini authored
17 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
18 /* -- */
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
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]+"),
24 PATTERNS("objc",
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
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_].*)$\n"
29 /* C functions */
959e2e6 @bonzini avoid exponential regex match for java and objc function names
bonzini authored
30 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
31 /* Objective-C class/protocol definitions */
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
32 "^(@(implementation|interface|protocol)[ \t].*)$",
33 /* -- */
34 "[a-zA-Z_][a-zA-Z0-9_]*"
35 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
36 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
37 "|[^[:space:]]|[\x80-\xff]+"),
38 PATTERNS("pascal",
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
39 "^((procedure|function|constructor|destructor|interface|"
40 "implementation|initialization|finalization)[ \t]*.*)$"
41 "\n"
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
42 "^(.*=[ \t]*(class|record).*)$",
43 /* -- */
44 "[a-zA-Z_][a-zA-Z0-9_]*"
45 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
46 "|<>|<=|>=|:=|\\.\\."
47 "|[^[:space:]]|[\x80-\xff]+"),
48 PATTERNS("php", "^[\t ]*((function|class).*)",
49 /* -- */
50 "[a-zA-Z_][a-zA-Z0-9_]*"
51 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
52 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"
53 "|[^[:space:]]|[\x80-\xff]+"),
54 PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
55 /* -- */
56 "[a-zA-Z_][a-zA-Z0-9_]*"
57 "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
58 "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"
59 "|[^[:space:]|[\x80-\xff]+"),
60 /* -- */
61 PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
62 /* -- */
63 "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
64 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
65 "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"
66 "|[^[:space:]|[\x80-\xff]+"),
67 PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
68 "[={}\"]|[^={}\" \t]+"),
69 PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
70 "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+|[^[:space:]]"),
71 PATTERNS("cpp",
72 /* Jump targets or access declarations */
73 "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:.*$\n"
74 /* C/++ functions/methods at top level */
75 "^([A-Za-z_][A-Za-z_0-9]*([ \t]+[A-Za-z_][A-Za-z_0-9]*([ \t]*::[ \t]*[^[:space:]]+)?){1,}[ \t]*\\([^;]*)$\n"
76 /* compound type at top level */
77 "^((struct|class|enum)[^;]*)$",
78 /* -- */
79 "[a-zA-Z_][a-zA-Z0-9_]*"
80 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
81 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
82 "|[^[:space:]]|[\x80-\xff]+"),
122aa6f @peff diff: introduce diff.<driver>.binary
peff authored
83 { "default", NULL, -1, { NULL, 0 } },
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
84 };
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
85 #undef PATTERNS
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86
87 static struct userdiff_driver driver_true = {
88 "diff=true",
89 NULL,
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90 0,
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91 { NULL, 0 }
92 };
93
94 static struct userdiff_driver driver_false = {
95 "!diff",
96 NULL,
122aa6f @peff diff: introduce diff.<driver>.binary
peff authored
97 1,
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
98 { NULL, 0 }
99 };
100
101 static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
102 {
103 int i;
104 for (i = 0; i < ndrivers; i++) {
105 struct userdiff_driver *drv = drivers + i;
106 if (!strncmp(drv->name, k, len) && !drv->name[len])
107 return drv;
108 }
109 for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
110 struct userdiff_driver *drv = builtin_drivers + i;
111 if (!strncmp(drv->name, k, len) && !drv->name[len])
112 return drv;
113 }
114 return NULL;
115 }
116
117 static struct userdiff_driver *parse_driver(const char *var,
118 const char *value, const char *type)
119 {
120 struct userdiff_driver *drv;
121 const char *dot;
122 const char *name;
123 int namelen;
124
125 if (prefixcmp(var, "diff."))
126 return NULL;
127 dot = strrchr(var, '.');
128 if (dot == var + 4)
129 return NULL;
130 if (strcmp(type, dot+1))
131 return NULL;
132
133 name = var + 5;
134 namelen = dot - name;
135 drv = userdiff_find_by_namelen(name, namelen);
136 if (!drv) {
137 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
138 drv = &drivers[ndrivers++];
139 memset(drv, 0, sizeof(*drv));
140 drv->name = xmemdupz(name, namelen);
122aa6f @peff diff: introduce diff.<driver>.binary
peff authored
141 drv->binary = -1;
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
142 }
143 return drv;
144 }
145
146 static int parse_funcname(struct userdiff_funcname *f, const char *k,
147 const char *v, int cflags)
148 {
149 if (git_config_string(&f->pattern, k, v) < 0)
150 return -1;
151 f->cflags = cflags;
152 return 1;
153 }
154
155 static int parse_string(const char **d, const char *k, const char *v)
156 {
157 if (git_config_string(d, k, v) < 0)
158 return -1;
159 return 1;
160 }
161
122aa6f @peff diff: introduce diff.<driver>.binary
peff authored
162 static int parse_tristate(int *b, const char *k, const char *v)
163 {
164 if (v && !strcasecmp(v, "auto"))
165 *b = -1;
166 else
167 *b = git_config_bool(k, v);
168 return 1;
169 }
170
d9bae1a @peff diff: cache textconv output
peff authored
171 static int parse_bool(int *b, const char *k, const char *v)
172 {
173 *b = git_config_bool(k, v);
174 return 1;
175 }
176
c7534ef @peff userdiff: require explicitly allowing textconv
peff authored
177 int userdiff_config(const char *k, const char *v)
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
178 {
179 struct userdiff_driver *drv;
180
181 if ((drv = parse_driver(k, v, "funcname")))
182 return parse_funcname(&drv->funcname, k, v, 0);
183 if ((drv = parse_driver(k, v, "xfuncname")))
184 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
122aa6f @peff diff: introduce diff.<driver>.binary
peff authored
185 if ((drv = parse_driver(k, v, "binary")))
186 return parse_tristate(&drv->binary, k, v);
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
187 if ((drv = parse_driver(k, v, "command")))
188 return parse_string(&drv->external, k, v);
9cb92c3 @peff diff: add filter for converting binary to text
peff authored
189 if ((drv = parse_driver(k, v, "textconv")))
190 return parse_string(&drv->textconv, k, v);
d9bae1a @peff diff: cache textconv output
peff authored
191 if ((drv = parse_driver(k, v, "cachetextconv")))
192 return parse_bool(&drv->textconv_want_cache, k, v);
80c49c3 @trast color-words: make regex configurable via attributes
trast authored
193 if ((drv = parse_driver(k, v, "wordregex")))
194 return parse_string(&drv->word_regex, k, v);
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
195
196 return 0;
197 }
198
199 struct userdiff_driver *userdiff_find_by_name(const char *name) {
200 int len = strlen(name);
201 return userdiff_find_by_namelen(name, len);
202 }
203
204 struct userdiff_driver *userdiff_find_by_path(const char *path)
205 {
206 static struct git_attr *attr;
207 struct git_attr_check check;
208
209 if (!attr)
7fb0eaa @gitster git_attr(): fix function signature
gitster authored
210 attr = git_attr("diff");
be58e70 @peff diff: unify external diff and funcname parsing code
peff authored
211 check.attr = attr;
212
213 if (!path)
214 return NULL;
215 if (git_checkattr(path, 1, &check))
216 return NULL;
217
218 if (ATTR_TRUE(check.value))
219 return &driver_true;
220 if (ATTR_FALSE(check.value))
221 return &driver_false;
222 if (ATTR_UNSET(check.value))
223 return NULL;
224 return userdiff_find_by_name(check.value);
225 }
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