Andrew's git - gitweb.git/blob

   1#include "userdiff.h"
   2#include "cache.h"
   3#include "attr.h"
   4
   5static struct userdiff_driver *drivers;
   6static int ndrivers;
   7static int drivers_alloc;
   8
   9#define FUNCNAME(name, pattern) \
  10        { name, NULL, { pattern, REG_EXTENDED } }
  11static struct userdiff_driver builtin_drivers[] = {
  12FUNCNAME("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$"),
  13FUNCNAME("java",
  14         "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  15         "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$"),
  16FUNCNAME("objc",
  17         /* Negate C statements that can look like functions */
  18         "!^[ \t]*(do|for|if|else|return|switch|while)\n"
  19         /* Objective-C methods */
  20         "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
  21         /* C functions */
  22         "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$\n"
  23         /* Objective-C class/protocol definitions */
  24         "^(@(implementation|interface|protocol)[ \t].*)$"),
  25FUNCNAME("pascal",
  26         "^((procedure|function|constructor|destructor|interface|"
  27                "implementation|initialization|finalization)[ \t]*.*)$"
  28         "\n"
  29         "^(.*=[ \t]*(class|record).*)$"),
  30FUNCNAME("php", "^[\t ]*((function|class).*)"),
  31FUNCNAME("python", "^[ \t]*((class|def)[ \t].*)$"),
  32FUNCNAME("ruby", "^[ \t]*((class|module|def)[ \t].*)$"),
  33FUNCNAME("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$"),
  34FUNCNAME("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$"),
  35};
  36#undef FUNCNAME
  37
  38static struct userdiff_driver driver_true = {
  39        "diff=true",
  40        NULL,
  41        { NULL, 0 }
  42};
  43struct userdiff_driver *USERDIFF_ATTR_TRUE = &driver_true;
  44
  45static struct userdiff_driver driver_false = {
  46        "!diff",
  47        NULL,
  48        { NULL, 0 }
  49};
  50struct userdiff_driver *USERDIFF_ATTR_FALSE = &driver_false;
  51
  52static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
  53{
  54        int i;
  55        for (i = 0; i < ndrivers; i++) {
  56                struct userdiff_driver *drv = drivers + i;
  57                if (!strncmp(drv->name, k, len) && !drv->name[len])
  58                        return drv;
  59        }
  60        for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
  61                struct userdiff_driver *drv = builtin_drivers + i;
  62                if (!strncmp(drv->name, k, len) && !drv->name[len])
  63                        return drv;
  64        }
  65        return NULL;
  66}
  67
  68static struct userdiff_driver *parse_driver(const char *var,
  69                const char *value, const char *type)
  70{
  71        struct userdiff_driver *drv;
  72        const char *dot;
  73        const char *name;
  74        int namelen;
  75
  76        if (prefixcmp(var, "diff."))
  77                return NULL;
  78        dot = strrchr(var, '.');
  79        if (dot == var + 4)
  80                return NULL;
  81        if (strcmp(type, dot+1))
  82                return NULL;
  83
  84        name = var + 5;
  85        namelen = dot - name;
  86        drv = userdiff_find_by_namelen(name, namelen);
  87        if (!drv) {
  88                ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
  89                drv = &drivers[ndrivers++];
  90                memset(drv, 0, sizeof(*drv));
  91                drv->name = xmemdupz(name, namelen);
  92        }
  93        return drv;
  94}
  95
  96static int parse_funcname(struct userdiff_funcname *f, const char *k,
  97                const char *v, int cflags)
  98{
  99        if (git_config_string(&f->pattern, k, v) < 0)
 100                return -1;
 101        f->cflags = cflags;
 102        return 1;
 103}
 104
 105static int parse_string(const char **d, const char *k, const char *v)
 106{
 107        if (git_config_string(d, k, v) < 0)
 108                return -1;
 109        return 1;
 110}
 111
 112int userdiff_config_basic(const char *k, const char *v)
 113{
 114        struct userdiff_driver *drv;
 115
 116        if ((drv = parse_driver(k, v, "funcname")))
 117                return parse_funcname(&drv->funcname, k, v, 0);
 118        if ((drv = parse_driver(k, v, "xfuncname")))
 119                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 120
 121        return 0;
 122}
 123
 124int userdiff_config_porcelain(const char *k, const char *v)
 125{
 126        struct userdiff_driver *drv;
 127
 128        if ((drv = parse_driver(k, v, "command")))
 129                return parse_string(&drv->external, k, v);
 130
 131        return 0;
 132}
 133
 134struct userdiff_driver *userdiff_find_by_name(const char *name) {
 135        int len = strlen(name);
 136        return userdiff_find_by_namelen(name, len);
 137}
 138
 139struct userdiff_driver *userdiff_find_by_path(const char *path)
 140{
 141        static struct git_attr *attr;
 142        struct git_attr_check check;
 143
 144        if (!attr)
 145                attr = git_attr("diff", 4);
 146        check.attr = attr;
 147
 148        if (!path)
 149                return NULL;
 150        if (git_checkattr(path, 1, &check))
 151                return NULL;
 152
 153        if (ATTR_TRUE(check.value))
 154                return &driver_true;
 155        if (ATTR_FALSE(check.value))
 156                return &driver_false;
 157        if (ATTR_UNSET(check.value))
 158                return NULL;
 159        return userdiff_find_by_name(check.value);
 160}