userdiff.con commit Merge branch 'jc/notes-batch-removal' (3d109dd)
   1#include "cache.h"
   2#include "userdiff.h"
   3#include "cache.h"
   4#include "attr.h"
   5
   6static struct userdiff_driver *drivers;
   7static int ndrivers;
   8static 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]+" }
  16static struct userdiff_driver builtin_drivers[] = {
  17IPATTERN("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].*)$",
  22         /* -- */
  23         "[a-zA-Z][a-zA-Z0-9_]*"
  24         "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
  25         /* numbers and format statements like 2E14.4, or ES12.6, 9X.
  26          * Don't worry about format statements without leading digits since
  27          * they would have been matched above as a variable anyway. */
  28         "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
  29         "|//|\\*\\*|::|[/<>=]="),
  30PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
  31         "[^<>= \t]+"),
  32PATTERNS("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]*\\([^;]*)$",
  35         /* -- */
  36         "[a-zA-Z_][a-zA-Z0-9_]*"
  37         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  38         "|[-+*/<>%&^|=!]="
  39         "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
  40PATTERNS("objc",
  41         /* Negate C statements that can look like functions */
  42         "!^[ \t]*(do|for|if|else|return|switch|while)\n"
  43         /* Objective-C methods */
  44         "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\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         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
  53PATTERNS("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         "|<>|<=|>=|:=|\\.\\."),
  62PATTERNS("perl",
  63         "^package .*\n"
  64         "^sub [[:alnum:]_':]+[ \t]*"
  65                "(\\([^)]*\\)[ \t]*)?" /* prototype */
  66                /*
  67                 * Attributes.  A regex can't count nested parentheses,
  68                 * so just slurp up whatever we see, taking care not
  69                 * to accept lines like "sub foo; # defined elsewhere".
  70                 *
  71                 * An attribute could contain a semicolon, but at that
  72                 * point it seems reasonable enough to give up.
  73                 */
  74                "(:[^;#]*)?"
  75                "(\\{[ \t]*)?" /* brace can come here or on the next line */
  76                "(#.*)?$\n" /* comment */
  77         "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
  78                "(\\{[ \t]*)?" /* brace can come here or on the next line */
  79                "(#.*)?$\n"
  80         "^=head[0-9] .*",      /* POD */
  81         /* -- */
  82         "[[:alpha:]_'][[:alnum:]_']*"
  83         "|0[xb]?[0-9a-fA-F_]*"
  84         /* taking care not to interpret 3..5 as (3.)(.5) */
  85         "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
  86         "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
  87         "|&&=|\\|\\|=|//=|\\*\\*="
  88         "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
  89         "|[-+*/%.^&<>=!|]="
  90         "|=~|!~"
  91         "|<<|<>|<=>|>>"),
  92PATTERNS("php",
  93         "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
  94         "^[\t ]*(class.*)$",
  95         /* -- */
  96         "[a-zA-Z_][a-zA-Z0-9_]*"
  97         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  98         "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
  99PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
 100         /* -- */
 101         "[a-zA-Z_][a-zA-Z0-9_]*"
 102         "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
 103         "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
 104         /* -- */
 105PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
 106         /* -- */
 107         "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
 108         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
 109         "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
 110PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 111         "[={}\"]|[^={}\" \t]+"),
 112PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 113         "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
 114PATTERNS("cpp",
 115         /* Jump targets or access declarations */
 116         "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:.*$\n"
 117         /* C/++ functions/methods at top level */
 118         "^([A-Za-z_][A-Za-z_0-9]*([ \t]+[A-Za-z_][A-Za-z_0-9]*([ \t]*::[ \t]*[^[:space:]]+)?){1,}[ \t]*\\([^;]*)$\n"
 119         /* compound type at top level */
 120         "^((struct|class|enum)[^;]*)$",
 121         /* -- */
 122         "[a-zA-Z_][a-zA-Z0-9_]*"
 123         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 124         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 125PATTERNS("csharp",
 126         /* Keywords */
 127         "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
 128         /* Methods and constructors */
 129         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
 130         /* Properties */
 131         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
 132         /* Type definitions */
 133         "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
 134         /* Namespace */
 135         "^[ \t]*(namespace[ \t]+.*)$",
 136         /* -- */
 137         "[a-zA-Z_][a-zA-Z0-9_]*"
 138         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 139         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 140{ "default", NULL, -1, { NULL, 0 } },
 141};
 142#undef PATTERNS
 143#undef IPATTERN
 144
 145static struct userdiff_driver driver_true = {
 146        "diff=true",
 147        NULL,
 148        0,
 149        { NULL, 0 }
 150};
 151
 152static struct userdiff_driver driver_false = {
 153        "!diff",
 154        NULL,
 155        1,
 156        { NULL, 0 }
 157};
 158
 159static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
 160{
 161        int i;
 162        for (i = 0; i < ndrivers; i++) {
 163                struct userdiff_driver *drv = drivers + i;
 164                if (!strncmp(drv->name, k, len) && !drv->name[len])
 165                        return drv;
 166        }
 167        for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
 168                struct userdiff_driver *drv = builtin_drivers + i;
 169                if (!strncmp(drv->name, k, len) && !drv->name[len])
 170                        return drv;
 171        }
 172        return NULL;
 173}
 174
 175static struct userdiff_driver *parse_driver(const char *var,
 176                const char *value, const char *type)
 177{
 178        struct userdiff_driver *drv;
 179        const char *dot;
 180        const char *name;
 181        int namelen;
 182
 183        if (prefixcmp(var, "diff."))
 184                return NULL;
 185        dot = strrchr(var, '.');
 186        if (dot == var + 4)
 187                return NULL;
 188        if (strcmp(type, dot+1))
 189                return NULL;
 190
 191        name = var + 5;
 192        namelen = dot - name;
 193        drv = userdiff_find_by_namelen(name, namelen);
 194        if (!drv) {
 195                ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
 196                drv = &drivers[ndrivers++];
 197                memset(drv, 0, sizeof(*drv));
 198                drv->name = xmemdupz(name, namelen);
 199                drv->binary = -1;
 200        }
 201        return drv;
 202}
 203
 204static int parse_funcname(struct userdiff_funcname *f, const char *k,
 205                const char *v, int cflags)
 206{
 207        if (git_config_string(&f->pattern, k, v) < 0)
 208                return -1;
 209        f->cflags = cflags;
 210        return 1;
 211}
 212
 213static int parse_string(const char **d, const char *k, const char *v)
 214{
 215        if (git_config_string(d, k, v) < 0)
 216                return -1;
 217        return 1;
 218}
 219
 220static int parse_tristate(int *b, const char *k, const char *v)
 221{
 222        if (v && !strcasecmp(v, "auto"))
 223                *b = -1;
 224        else
 225                *b = git_config_bool(k, v);
 226        return 1;
 227}
 228
 229static int parse_bool(int *b, const char *k, const char *v)
 230{
 231        *b = git_config_bool(k, v);
 232        return 1;
 233}
 234
 235int userdiff_config(const char *k, const char *v)
 236{
 237        struct userdiff_driver *drv;
 238
 239        if ((drv = parse_driver(k, v, "funcname")))
 240                return parse_funcname(&drv->funcname, k, v, 0);
 241        if ((drv = parse_driver(k, v, "xfuncname")))
 242                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 243        if ((drv = parse_driver(k, v, "binary")))
 244                return parse_tristate(&drv->binary, k, v);
 245        if ((drv = parse_driver(k, v, "command")))
 246                return parse_string(&drv->external, k, v);
 247        if ((drv = parse_driver(k, v, "textconv")))
 248                return parse_string(&drv->textconv, k, v);
 249        if ((drv = parse_driver(k, v, "cachetextconv")))
 250                return parse_bool(&drv->textconv_want_cache, k, v);
 251        if ((drv = parse_driver(k, v, "wordregex")))
 252                return parse_string(&drv->word_regex, k, v);
 253
 254        return 0;
 255}
 256
 257struct userdiff_driver *userdiff_find_by_name(const char *name) {
 258        int len = strlen(name);
 259        return userdiff_find_by_namelen(name, len);
 260}
 261
 262struct userdiff_driver *userdiff_find_by_path(const char *path)
 263{
 264        static struct git_attr *attr;
 265        struct git_attr_check check;
 266
 267        if (!attr)
 268                attr = git_attr("diff");
 269        check.attr = attr;
 270
 271        if (!path)
 272                return NULL;
 273        if (git_checkattr(path, 1, &check))
 274                return NULL;
 275
 276        if (ATTR_TRUE(check.value))
 277                return &driver_true;
 278        if (ATTR_FALSE(check.value))
 279                return &driver_false;
 280        if (ATTR_UNSET(check.value))
 281                return NULL;
 282        return userdiff_find_by_name(check.value);
 283}