Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "userdiff.h"
   3#include "attr.h"
   4
   5static struct userdiff_driver *drivers;
   6static int ndrivers;
   7static int drivers_alloc;
   8
   9#define PATTERNS(name, pattern, word_regex)                     \
  10        { name, NULL, -1, { pattern, REG_EXTENDED },            \
  11          word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
  12#define IPATTERN(name, pattern, word_regex)                     \
  13        { name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \
  14          word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
  15static struct userdiff_driver builtin_drivers[] = {
  16IPATTERN("ada",
  17         "!^(.*[ \t])?(is[ \t]+new|renames|is[ \t]+separate)([ \t].*)?$\n"
  18         "!^[ \t]*with[ \t].*$\n"
  19         "^[ \t]*((procedure|function)[ \t]+.*)$\n"
  20         "^[ \t]*((package|protected|task)[ \t]+.*)$",
  21         /* -- */
  22         "[a-zA-Z][a-zA-Z0-9_]*"
  23         "|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
  24         "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
  25IPATTERN("fortran",
  26         "!^([C*]|[ \t]*!)\n"
  27         "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
  28         "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
  29                "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
  30         /* -- */
  31         "[a-zA-Z][a-zA-Z0-9_]*"
  32         "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
  33         /* numbers and format statements like 2E14.4, or ES12.6, 9X.
  34          * Don't worry about format statements without leading digits since
  35          * they would have been matched above as a variable anyway. */
  36         "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
  37         "|//|\\*\\*|::|[/<>=]="),
  38IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
  39         "[^ \t-]+"),
  40PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
  41         "[^<>= \t]+"),
  42PATTERNS("java",
  43         "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  44         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
  45         /* -- */
  46         "[a-zA-Z_][a-zA-Z0-9_]*"
  47         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  48         "|[-+*/<>%&^|=!]="
  49         "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
  50PATTERNS("matlab",
  51         "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
  52         "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
  53PATTERNS("objc",
  54         /* Negate C statements that can look like functions */
  55         "!^[ \t]*(do|for|if|else|return|switch|while)\n"
  56         /* Objective-C methods */
  57         "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
  58         /* C functions */
  59         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
  60         /* Objective-C class/protocol definitions */
  61         "^(@(implementation|interface|protocol)[ \t].*)$",
  62         /* -- */
  63         "[a-zA-Z_][a-zA-Z0-9_]*"
  64         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  65         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
  66PATTERNS("pascal",
  67         "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
  68                "implementation|initialization|finalization)[ \t]*.*)$"
  69         "\n"
  70         "^(.*=[ \t]*(class|record).*)$",
  71         /* -- */
  72         "[a-zA-Z_][a-zA-Z0-9_]*"
  73         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  74         "|<>|<=|>=|:=|\\.\\."),
  75PATTERNS("perl",
  76         "^package .*\n"
  77         "^sub [[:alnum:]_':]+[ \t]*"
  78                "(\\([^)]*\\)[ \t]*)?" /* prototype */
  79                /*
  80                 * Attributes.  A regex can't count nested parentheses,
  81                 * so just slurp up whatever we see, taking care not
  82                 * to accept lines like "sub foo; # defined elsewhere".
  83                 *
  84                 * An attribute could contain a semicolon, but at that
  85                 * point it seems reasonable enough to give up.
  86                 */
  87                "(:[^;#]*)?"
  88                "(\\{[ \t]*)?" /* brace can come here or on the next line */
  89                "(#.*)?$\n" /* comment */
  90         "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
  91                "(\\{[ \t]*)?" /* brace can come here or on the next line */
  92                "(#.*)?$\n"
  93         "^=head[0-9] .*",      /* POD */
  94         /* -- */
  95         "[[:alpha:]_'][[:alnum:]_']*"
  96         "|0[xb]?[0-9a-fA-F_]*"
  97         /* taking care not to interpret 3..5 as (3.)(.5) */
  98         "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
  99         "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
 100         "|&&=|\\|\\|=|//=|\\*\\*="
 101         "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
 102         "|[-+*/%.^&<>=!|]="
 103         "|=~|!~"
 104         "|<<|<>|<=>|>>"),
 105PATTERNS("php",
 106         "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
 107         "^[\t ]*(class.*)$",
 108         /* -- */
 109         "[a-zA-Z_][a-zA-Z0-9_]*"
 110         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
 111         "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
 112PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
 113         /* -- */
 114         "[a-zA-Z_][a-zA-Z0-9_]*"
 115         "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
 116         "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
 117         /* -- */
 118PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
 119         /* -- */
 120         "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
 121         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
 122         "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
 123PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 124         "[={}\"]|[^={}\" \t]+"),
 125PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 126         "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
 127PATTERNS("cpp",
 128         /* Jump targets or access declarations */
 129         "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
 130         /* functions/methods, variables, and compounds at top level */
 131         "^((::[[:space:]]*)?[A-Za-z_].*)$",
 132         /* -- */
 133         "[a-zA-Z_][a-zA-Z0-9_]*"
 134         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
 135         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
 136PATTERNS("csharp",
 137         /* Keywords */
 138         "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
 139         /* Methods and constructors */
 140         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
 141         /* Properties */
 142         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
 143         /* Type definitions */
 144         "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
 145         /* Namespace */
 146         "^[ \t]*(namespace[ \t]+.*)$",
 147         /* -- */
 148         "[a-zA-Z_][a-zA-Z0-9_]*"
 149         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 150         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 151IPATTERN("css",
 152         "![:;][[:space:]]*$\n"
 153         "^[_a-z0-9].*$",
 154         /* -- */
 155         /*
 156          * This regex comes from W3C CSS specs. Should theoretically also
 157          * allow ISO 10646 characters U+00A0 and higher,
 158          * but they are not handled in this regex.
 159          */
 160         "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
 161         "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
 162),
 163{ "default", NULL, -1, { NULL, 0 } },
 164};
 165#undef PATTERNS
 166#undef IPATTERN
 167
 168static struct userdiff_driver driver_true = {
 169        "diff=true",
 170        NULL,
 171        0,
 172        { NULL, 0 }
 173};
 174
 175static struct userdiff_driver driver_false = {
 176        "!diff",
 177        NULL,
 178        1,
 179        { NULL, 0 }
 180};
 181
 182static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
 183{
 184        int i;
 185        for (i = 0; i < ndrivers; i++) {
 186                struct userdiff_driver *drv = drivers + i;
 187                if (!strncmp(drv->name, k, len) && !drv->name[len])
 188                        return drv;
 189        }
 190        for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
 191                struct userdiff_driver *drv = builtin_drivers + i;
 192                if (!strncmp(drv->name, k, len) && !drv->name[len])
 193                        return drv;
 194        }
 195        return NULL;
 196}
 197
 198static int parse_funcname(struct userdiff_funcname *f, const char *k,
 199                const char *v, int cflags)
 200{
 201        if (git_config_string(&f->pattern, k, v) < 0)
 202                return -1;
 203        f->cflags = cflags;
 204        return 0;
 205}
 206
 207static int parse_tristate(int *b, const char *k, const char *v)
 208{
 209        if (v && !strcasecmp(v, "auto"))
 210                *b = -1;
 211        else
 212                *b = git_config_bool(k, v);
 213        return 0;
 214}
 215
 216static int parse_bool(int *b, const char *k, const char *v)
 217{
 218        *b = git_config_bool(k, v);
 219        return 0;
 220}
 221
 222int userdiff_config(const char *k, const char *v)
 223{
 224        struct userdiff_driver *drv;
 225        const char *name, *type;
 226        int namelen;
 227
 228        if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
 229                return 0;
 230
 231        drv = userdiff_find_by_namelen(name, namelen);
 232        if (!drv) {
 233                ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
 234                drv = &drivers[ndrivers++];
 235                memset(drv, 0, sizeof(*drv));
 236                drv->name = xmemdupz(name, namelen);
 237                drv->binary = -1;
 238        }
 239
 240        if (!strcmp(type, "funcname"))
 241                return parse_funcname(&drv->funcname, k, v, 0);
 242        if (!strcmp(type, "xfuncname"))
 243                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 244        if (!strcmp(type, "binary"))
 245                return parse_tristate(&drv->binary, k, v);
 246        if (!strcmp(type, "command"))
 247                return git_config_string(&drv->external, k, v);
 248        if (!strcmp(type, "textconv"))
 249                return git_config_string(&drv->textconv, k, v);
 250        if (!strcmp(type, "cachetextconv"))
 251                return parse_bool(&drv->textconv_want_cache, k, v);
 252        if (!strcmp(type, "wordregex"))
 253                return git_config_string(&drv->word_regex, k, v);
 254
 255        return 0;
 256}
 257
 258struct userdiff_driver *userdiff_find_by_name(const char *name) {
 259        int len = strlen(name);
 260        return userdiff_find_by_namelen(name, len);
 261}
 262
 263struct userdiff_driver *userdiff_find_by_path(const char *path)
 264{
 265        static struct git_attr *attr;
 266        struct git_attr_check check;
 267
 268        if (!attr)
 269                attr = git_attr("diff");
 270        check.attr = attr;
 271
 272        if (!path)
 273                return NULL;
 274        if (git_check_attr(path, 1, &check))
 275                return NULL;
 276
 277        if (ATTR_TRUE(check.value))
 278                return &driver_true;
 279        if (ATTR_FALSE(check.value))
 280                return &driver_false;
 281        if (ATTR_UNSET(check.value))
 282                return NULL;
 283        return userdiff_find_by_name(check.value);
 284}
 285
 286struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver)
 287{
 288        if (!driver->textconv)
 289                return NULL;
 290
 291        if (driver->textconv_want_cache && !driver->textconv_cache) {
 292                struct notes_cache *c = xmalloc(sizeof(*c));
 293                struct strbuf name = STRBUF_INIT;
 294
 295                strbuf_addf(&name, "textconv/%s", driver->name);
 296                notes_cache_init(c, name.buf, driver->textconv);
 297                driver->textconv_cache = c;
 298        }
 299
 300        return driver;
 301}