git.oblomov.eu Git - git/blob - userdiff.c

   1 #include "cache.h"
   2 #include "config.h"
   3 #include "userdiff.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("ada",
  18          "!^(.*[ \t])?(is[ \t]+new|renames|is[ \t]+separate)([ \t].*)?$\n"
  19          "!^[ \t]*with[ \t].*$\n"
  20          "^[ \t]*((procedure|function)[ \t]+.*)$\n"
  21          "^[ \t]*((package|protected|task)[ \t]+.*)$",
  22          /* -- */
  23          "[a-zA-Z][a-zA-Z0-9_]*"
  24          "|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
  25          "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
  26 IPATTERN("fortran",
  27          "!^([C*]|[ \t]*!)\n"
  28          "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
  29          "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
  30                 "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
  31          /* -- */
  32          "[a-zA-Z][a-zA-Z0-9_]*"
  33          "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
  34          /* numbers and format statements like 2E14.4, or ES12.6, 9X.
  35           * Don't worry about format statements without leading digits since
  36           * they would have been matched above as a variable anyway. */
  37          "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
  38          "|//|\\*\\*|::|[/<>=]="),
  39 IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
  40          "[^ \t-]+"),
  41 PATTERNS("golang",
  42          /* Functions */
  43          "^[ \t]*(func[ \t]*.*(\\{[ \t]*)?)\n"
  44          /* Structs and interfaces */
  45          "^[ \t]*(type[ \t].*(struct|interface)[ \t]*(\\{[ \t]*)?)",
  46          /* -- */
  47          "[a-zA-Z_][a-zA-Z0-9_]*"
  48          "|[-+0-9.eE]+i?|0[xX]?[0-9a-fA-F]+i?"
  49          "|[-+*/<>%&^|=!:]=|--|\\+\\+|<<=?|>>=?|&\\^=?|&&|\\|\\||<-|\\.{3}"),
  50 PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
  51          "[^<>= \t]+"),
  52 PATTERNS("java",
  53          "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  54          "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
  55          /* -- */
  56          "[a-zA-Z_][a-zA-Z0-9_]*"
  57          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  58          "|[-+*/<>%&^|=!]="
  59          "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
  60 PATTERNS("matlab",
  61          "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
  62          "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
  63 PATTERNS("objc",
  64          /* Negate C statements that can look like functions */
  65          "!^[ \t]*(do|for|if|else|return|switch|while)\n"
  66          /* Objective-C methods */
  67          "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
  68          /* C functions */
  69          "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
  70          /* Objective-C class/protocol definitions */
  71          "^(@(implementation|interface|protocol)[ \t].*)$",
  72          /* -- */
  73          "[a-zA-Z_][a-zA-Z0-9_]*"
  74          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  75          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
  76 PATTERNS("pascal",
  77          "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
  78                 "implementation|initialization|finalization)[ \t]*.*)$"
  79          "\n"
  80          "^(.*=[ \t]*(class|record).*)$",
  81          /* -- */
  82          "[a-zA-Z_][a-zA-Z0-9_]*"
  83          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  84          "|<>|<=|>=|:=|\\.\\."),
  85 PATTERNS("perl",
  86          "^package .*\n"
  87          "^sub [[:alnum:]_':]+[ \t]*"
  88                 "(\\([^)]*\\)[ \t]*)?" /* prototype */
  89                 /*
  90                  * Attributes.  A regex can't count nested parentheses,
  91                  * so just slurp up whatever we see, taking care not
  92                  * to accept lines like "sub foo; # defined elsewhere".
  93                  *
  94                  * An attribute could contain a semicolon, but at that
  95                  * point it seems reasonable enough to give up.
  96                  */
  97                 "(:[^;#]*)?"
  98                 "(\\{[ \t]*)?" /* brace can come here or on the next line */
  99                 "(#.*)?$\n" /* comment */
 100          "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
 101                 "(\\{[ \t]*)?" /* brace can come here or on the next line */
 102                 "(#.*)?$\n"
 103          "^=head[0-9] .*",      /* POD */
 104          /* -- */
 105          "[[:alpha:]_'][[:alnum:]_']*"
 106          "|0[xb]?[0-9a-fA-F_]*"
 107          /* taking care not to interpret 3..5 as (3.)(.5) */
 108          "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
 109          "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
 110          "|&&=|\\|\\|=|//=|\\*\\*="
 111          "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
 112          "|[-+*/%.^&<>=!|]="
 113          "|=~|!~"
 114          "|<<|<>|<=>|>>"),
 115 PATTERNS("php",
 116          "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
 117          "^[\t ]*((((final|abstract)[\t ]+)?class|interface|trait).*)$",
 118          /* -- */
 119          "[a-zA-Z_][a-zA-Z0-9_]*"
 120          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
 121          "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
 122 PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
 123          /* -- */
 124          "[a-zA-Z_][a-zA-Z0-9_]*"
 125          "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
 126          "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
 127          /* -- */
 128 PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
 129          /* -- */
 130          "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
 131          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
 132          "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
 133 PATTERNS("rust",
 134          "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl)[< \t]+[^;]*)$",
 135          /* -- */
 136          "[a-zA-Z_][a-zA-Z0-9_]*"
 137          "|[0-9][0-9_a-fA-Fiosuxz]*(\\.([0-9]*[eE][+-]?)?[0-9_fF]*)?"
 138          "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
 139 PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 140          "[={}\"]|[^={}\" \t]+"),
 141 PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 142          "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
 143 PATTERNS("cpp",
 144          /* Jump targets or access declarations */
 145          "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
 146          /* functions/methods, variables, and compounds at top level */
 147          "^((::[[:space:]]*)?[A-Za-z_].*)$",
 148          /* -- */
 149          "[a-zA-Z_][a-zA-Z0-9_]*"
 150          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
 151          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
 152 PATTERNS("csharp",
 153          /* Keywords */
 154          "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
 155          /* Methods and constructors */
 156          "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe|async)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
 157          /* Properties */
 158          "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
 159          /* Type definitions */
 160          "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
 161          /* Namespace */
 162          "^[ \t]*(namespace[ \t]+.*)$",
 163          /* -- */
 164          "[a-zA-Z_][a-zA-Z0-9_]*"
 165          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 166          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 167 IPATTERN("css",
 168          "![:;][[:space:]]*$\n"
 169          "^[_a-z0-9].*$",
 170          /* -- */
 171          /*
 172           * This regex comes from W3C CSS specs. Should theoretically also
 173           * allow ISO 10646 characters U+00A0 and higher,
 174           * but they are not handled in this regex.
 175           */
 176          "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
 177          "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
 178 ),
 179 { "default", NULL, -1, { NULL, 0 } },
 180 };
 181 #undef PATTERNS
 182 #undef IPATTERN
 183
 184 static struct userdiff_driver driver_true = {
 185         "diff=true",
 186         NULL,
 187         0,
 188         { NULL, 0 }
 189 };
 190
 191 static struct userdiff_driver driver_false = {
 192         "!diff",
 193         NULL,
 194         1,
 195         { NULL, 0 }
 196 };
 197
 198 static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
 199 {
 200         int i;
 201         for (i = 0; i < ndrivers; i++) {
 202                 struct userdiff_driver *drv = drivers + i;
 203                 if (!strncmp(drv->name, k, len) && !drv->name[len])
 204                         return drv;
 205         }
 206         for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
 207                 struct userdiff_driver *drv = builtin_drivers + i;
 208                 if (!strncmp(drv->name, k, len) && !drv->name[len])
 209                         return drv;
 210         }
 211         return NULL;
 212 }
 213
 214 static int parse_funcname(struct userdiff_funcname *f, const char *k,
 215                 const char *v, int cflags)
 216 {
 217         if (git_config_string(&f->pattern, k, v) < 0)
 218                 return -1;
 219         f->cflags = cflags;
 220         return 0;
 221 }
 222
 223 static int parse_tristate(int *b, const char *k, const char *v)
 224 {
 225         if (v && !strcasecmp(v, "auto"))
 226                 *b = -1;
 227         else
 228                 *b = git_config_bool(k, v);
 229         return 0;
 230 }
 231
 232 static int parse_bool(int *b, const char *k, const char *v)
 233 {
 234         *b = git_config_bool(k, v);
 235         return 0;
 236 }
 237
 238 int userdiff_config(const char *k, const char *v)
 239 {
 240         struct userdiff_driver *drv;
 241         const char *name, *type;
 242         int namelen;
 243
 244         if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
 245                 return 0;
 246
 247         drv = userdiff_find_by_namelen(name, namelen);
 248         if (!drv) {
 249                 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
 250                 drv = &drivers[ndrivers++];
 251                 memset(drv, 0, sizeof(*drv));
 252                 drv->name = xmemdupz(name, namelen);
 253                 drv->binary = -1;
 254         }
 255
 256         if (!strcmp(type, "funcname"))
 257                 return parse_funcname(&drv->funcname, k, v, 0);
 258         if (!strcmp(type, "xfuncname"))
 259                 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 260         if (!strcmp(type, "binary"))
 261                 return parse_tristate(&drv->binary, k, v);
 262         if (!strcmp(type, "command"))
 263                 return git_config_string(&drv->external, k, v);
 264         if (!strcmp(type, "textconv"))
 265                 return git_config_string(&drv->textconv, k, v);
 266         if (!strcmp(type, "cachetextconv"))
 267                 return parse_bool(&drv->textconv_want_cache, k, v);
 268         if (!strcmp(type, "wordregex"))
 269                 return git_config_string(&drv->word_regex, k, v);
 270
 271         return 0;
 272 }
 273
 274 struct userdiff_driver *userdiff_find_by_name(const char *name)
 275 {
 276         int len = strlen(name);
 277         return userdiff_find_by_namelen(name, len);
 278 }
 279
 280 struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
 281                                               const char *path)
 282 {
 283         static struct attr_check *check;
 284
 285         if (!check)
 286                 check = attr_check_initl("diff", NULL);
 287         if (!path)
 288                 return NULL;
 289         git_check_attr(istate, path, check);
 290
 291         if (ATTR_TRUE(check->items[0].value))
 292                 return &driver_true;
 293         if (ATTR_FALSE(check->items[0].value))
 294                 return &driver_false;
 295         if (ATTR_UNSET(check->items[0].value))
 296                 return NULL;
 297         return userdiff_find_by_name(check->items[0].value);
 298 }
 299
 300 struct userdiff_driver *userdiff_get_textconv(struct repository *r,
 301                                               struct userdiff_driver *driver)
 302 {
 303         if (!driver->textconv)
 304                 return NULL;
 305
 306         if (driver->textconv_want_cache && !driver->textconv_cache) {
 307                 struct notes_cache *c = xmalloc(sizeof(*c));
 308                 struct strbuf name = STRBUF_INIT;
 309
 310                 strbuf_addf(&name, "textconv/%s", driver->name);
 311                 notes_cache_init(r, c, name.buf, driver->textconv);
 312                 driver->textconv_cache = c;
 313                 strbuf_release(&name);
 314         }
 315
 316         return driver;
 317 }