Andrew's git / gitweb.git / userdiff.c
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userdiff.con commit transport-helper.c: refactor set_helper_option() (9318c5d)
   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         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 151{ "default", NULL, -1, { NULL, 0 } },
 152};
 153#undef PATTERNS
 154#undef IPATTERN
 155
 156static struct userdiff_driver driver_true = {
 157        "diff=true",
 158        NULL,
 159        0,
 160        { NULL, 0 }
 161};
 162
 163static struct userdiff_driver driver_false = {
 164        "!diff",
 165        NULL,
 166        1,
 167        { NULL, 0 }
 168};
 169
 170static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
 171{
 172        int i;
 173        for (i = 0; i < ndrivers; i++) {
 174                struct userdiff_driver *drv = drivers + i;
 175                if (!strncmp(drv->name, k, len) && !drv->name[len])
 176                        return drv;
 177        }
 178        for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
 179                struct userdiff_driver *drv = builtin_drivers + i;
 180                if (!strncmp(drv->name, k, len) && !drv->name[len])
 181                        return drv;
 182        }
 183        return NULL;
 184}
 185
 186static int parse_funcname(struct userdiff_funcname *f, const char *k,
 187                const char *v, int cflags)
 188{
 189        if (git_config_string(&f->pattern, k, v) < 0)
 190                return -1;
 191        f->cflags = cflags;
 192        return 0;
 193}
 194
 195static int parse_tristate(int *b, const char *k, const char *v)
 196{
 197        if (v && !strcasecmp(v, "auto"))
 198                *b = -1;
 199        else
 200                *b = git_config_bool(k, v);
 201        return 0;
 202}
 203
 204static int parse_bool(int *b, const char *k, const char *v)
 205{
 206        *b = git_config_bool(k, v);
 207        return 0;
 208}
 209
 210int userdiff_config(const char *k, const char *v)
 211{
 212        struct userdiff_driver *drv;
 213        const char *name, *type;
 214        int namelen;
 215
 216        if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
 217                return 0;
 218
 219        drv = userdiff_find_by_namelen(name, namelen);
 220        if (!drv) {
 221                ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
 222                drv = &drivers[ndrivers++];
 223                memset(drv, 0, sizeof(*drv));
 224                drv->name = xmemdupz(name, namelen);
 225                drv->binary = -1;
 226        }
 227
 228        if (!strcmp(type, "funcname"))
 229                return parse_funcname(&drv->funcname, k, v, 0);
 230        if (!strcmp(type, "xfuncname"))
 231                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 232        if (!strcmp(type, "binary"))
 233                return parse_tristate(&drv->binary, k, v);
 234        if (!strcmp(type, "command"))
 235                return git_config_string(&drv->external, k, v);
 236        if (!strcmp(type, "textconv"))
 237                return git_config_string(&drv->textconv, k, v);
 238        if (!strcmp(type, "cachetextconv"))
 239                return parse_bool(&drv->textconv_want_cache, k, v);
 240        if (!strcmp(type, "wordregex"))
 241                return git_config_string(&drv->word_regex, k, v);
 242
 243        return 0;
 244}
 245
 246struct userdiff_driver *userdiff_find_by_name(const char *name) {
 247        int len = strlen(name);
 248        return userdiff_find_by_namelen(name, len);
 249}
 250
 251struct userdiff_driver *userdiff_find_by_path(const char *path)
 252{
 253        static struct git_attr *attr;
 254        struct git_attr_check check;
 255
 256        if (!attr)
 257                attr = git_attr("diff");
 258        check.attr = attr;
 259
 260        if (!path)
 261                return NULL;
 262        if (git_check_attr(path, 1, &check))
 263                return NULL;
 264
 265        if (ATTR_TRUE(check.value))
 266                return &driver_true;
 267        if (ATTR_FALSE(check.value))
 268                return &driver_false;
 269        if (ATTR_UNSET(check.value))
 270                return NULL;
 271        return userdiff_find_by_name(check.value);
 272}
 273
 274struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver)
 275{
 276        if (!driver->textconv)
 277                return NULL;
 278
 279        if (driver->textconv_want_cache && !driver->textconv_cache) {
 280                struct notes_cache *c = xmalloc(sizeof(*c));
 281                struct strbuf name = STRBUF_INIT;
 282
 283                strbuf_addf(&name, "textconv/%s", driver->name);
 284                notes_cache_init(c, name.buf, driver->textconv);
 285                driver->textconv_cache = c;
 286        }
 287
 288        return driver;
 289}