Andrew's git - gitweb.git/blob

   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 }, word_regex }
  12static struct userdiff_driver builtin_drivers[] = {
  13PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
  14         "[^<>= \t]+|[^[:space:]]|[\x80-\xff]+"),
  15PATTERNS("java",
  16         "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  17         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
  18         /* -- */
  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]+"),
  24PATTERNS("objc",
  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_].*)$\n"
  29         /* C functions */
  30         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
  31         /* Objective-C class/protocol definitions */
  32         "^(@(implementation|interface|protocol)[ \t].*)$",
  33         /* -- */
  34         "[a-zA-Z_][a-zA-Z0-9_]*"
  35         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  36         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
  37         "|[^[:space:]]|[\x80-\xff]+"),
  38PATTERNS("pascal",
  39         "^((procedure|function|constructor|destructor|interface|"
  40                "implementation|initialization|finalization)[ \t]*.*)$"
  41         "\n"
  42         "^(.*=[ \t]*(class|record).*)$",
  43         /* -- */
  44         "[a-zA-Z_][a-zA-Z0-9_]*"
  45         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  46         "|<>|<=|>=|:=|\\.\\."
  47         "|[^[:space:]]|[\x80-\xff]+"),
  48PATTERNS("php", "^[\t ]*((function|class).*)",
  49         /* -- */
  50         "[a-zA-Z_][a-zA-Z0-9_]*"
  51         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  52         "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"
  53         "|[^[:space:]]|[\x80-\xff]+"),
  54PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
  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         /* -- */
  61PATTERNS("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]+"),
  67PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
  68         "[={}\"]|[^={}\" \t]+"),
  69PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
  70         "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+|[^[:space:]]"),
  71PATTERNS("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]+"),
  83{ "default", NULL, -1, { NULL, 0 } },
  84};
  85#undef PATTERNS
  86
  87static struct userdiff_driver driver_true = {
  88        "diff=true",
  89        NULL,
  90        0,
  91        { NULL, 0 }
  92};
  93
  94static struct userdiff_driver driver_false = {
  95        "!diff",
  96        NULL,
  97        1,
  98        { NULL, 0 }
  99};
 100
 101static 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
 117static 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);
 141                drv->binary = -1;
 142        }
 143        return drv;
 144}
 145
 146static 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
 155static 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
 162static 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
 171static int parse_bool(int *b, const char *k, const char *v)
 172{
 173        *b = git_config_bool(k, v);
 174        return 1;
 175}
 176
 177int userdiff_config(const char *k, const char *v)
 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);
 185        if ((drv = parse_driver(k, v, "binary")))
 186                return parse_tristate(&drv->binary, k, v);
 187        if ((drv = parse_driver(k, v, "command")))
 188                return parse_string(&drv->external, k, v);
 189        if ((drv = parse_driver(k, v, "textconv")))
 190                return parse_string(&drv->textconv, k, v);
 191        if ((drv = parse_driver(k, v, "cachetextconv")))
 192                return parse_bool(&drv->textconv_want_cache, k, v);
 193        if ((drv = parse_driver(k, v, "wordregex")))
 194                return parse_string(&drv->word_regex, k, v);
 195
 196        return 0;
 197}
 198
 199struct userdiff_driver *userdiff_find_by_name(const char *name) {
 200        int len = strlen(name);
 201        return userdiff_find_by_namelen(name, len);
 202}
 203
 204struct 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)
 210                attr = git_attr("diff");
 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}