diff options
Diffstat (limited to 'userdiff.c')
| -rw-r--r-- | userdiff.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/userdiff.c b/userdiff.c new file mode 100644 index 0000000000..d556da9751 --- /dev/null +++ b/userdiff.c @@ -0,0 +1,215 @@ +#include "userdiff.h" +#include "cache.h" +#include "attr.h" + +static struct userdiff_driver *drivers; +static int ndrivers; +static int drivers_alloc; + +#define PATTERNS(name, pattern, word_regex) \ + { name, NULL, -1, { pattern, REG_EXTENDED }, word_regex } +static struct userdiff_driver builtin_drivers[] = { +PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$", + "[^<>= \t]+|[^[:space:]]|[\x80-\xff]+"), +PATTERNS("java", + "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n" + "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$", + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" + "|[-+*/<>%&^|=!]=" + "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|" + "|[^[:space:]]|[\x80-\xff]+"), +PATTERNS("objc", + /* Negate C statements that can look like functions */ + "!^[ \t]*(do|for|if|else|return|switch|while)\n" + /* Objective-C methods */ + "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n" + /* C functions */ + "^[ \t]*(([ \t]*[A-Za-z_][A-Za-z_0-9]*){2,}[ \t]*\\([^;]*)$\n" + /* Objective-C class/protocol definitions */ + "^(@(implementation|interface|protocol)[ \t].*)$", + /* -- */ + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" + "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->" + "|[^[:space:]]|[\x80-\xff]+"), +PATTERNS("pascal", + "^((procedure|function|constructor|destructor|interface|" + "implementation|initialization|finalization)[ \t]*.*)$" + "\n" + "^(.*=[ \t]*(class|record).*)$", + /* -- */ + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+" + "|<>|<=|>=|:=|\\.\\." + "|[^[:space:]]|[\x80-\xff]+"), +PATTERNS("php", "^[\t ]*((function|class).*)", + /* -- */ + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+" + "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->" + "|[^[:space:]]|[\x80-\xff]+"), +PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$", + /* -- */ + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?" + "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?" + "|[^[:space:]|[\x80-\xff]+"), + /* -- */ +PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$", + /* -- */ + "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?." + "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~" + "|[^[:space:]|[\x80-\xff]+"), +PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$", + "[={}\"]|[^={}\" \t]+"), +PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$", + "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+|[^[:space:]]"), +PATTERNS("cpp", + /* Jump targets or access declarations */ + "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:.*$\n" + /* C/++ functions/methods at top level */ + "^([A-Za-z_][A-Za-z_0-9]*([ \t]+[A-Za-z_][A-Za-z_0-9]*([ \t]*::[ \t]*[^[:space:]]+)?){1,}[ \t]*\\([^;]*)$\n" + /* compound type at top level */ + "^((struct|class|enum)[^;]*)$", + /* -- */ + "[a-zA-Z_][a-zA-Z0-9_]*" + "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?" + "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->" + "|[^[:space:]]|[\x80-\xff]+"), +{ "default", NULL, -1, { NULL, 0 } }, +}; +#undef PATTERNS + +static struct userdiff_driver driver_true = { + "diff=true", + NULL, + 0, + { NULL, 0 } +}; + +static struct userdiff_driver driver_false = { + "!diff", + NULL, + 1, + { NULL, 0 } +}; + +static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len) +{ + int i; + for (i = 0; i < ndrivers; i++) { + struct userdiff_driver *drv = drivers + i; + if (!strncmp(drv->name, k, len) && !drv->name[len]) + return drv; + } + for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) { + struct userdiff_driver *drv = builtin_drivers + i; + if (!strncmp(drv->name, k, len) && !drv->name[len]) + return drv; + } + return NULL; +} + +static struct userdiff_driver *parse_driver(const char *var, + const char *value, const char *type) +{ + struct userdiff_driver *drv; + const char *dot; + const char *name; + int namelen; + + if (prefixcmp(var, "diff.")) + return NULL; + dot = strrchr(var, '.'); + if (dot == var + 4) + return NULL; + if (strcmp(type, dot+1)) + return NULL; + + name = var + 5; + namelen = dot - name; + drv = userdiff_find_by_namelen(name, namelen); + if (!drv) { + ALLOC_GROW(drivers, ndrivers+1, drivers_alloc); + drv = &drivers[ndrivers++]; + memset(drv, 0, sizeof(*drv)); + drv->name = xmemdupz(name, namelen); + drv->binary = -1; + } + return drv; +} + +static int parse_funcname(struct userdiff_funcname *f, const char *k, + const char *v, int cflags) +{ + if (git_config_string(&f->pattern, k, v) < 0) + return -1; + f->cflags = cflags; + return 1; +} + +static int parse_string(const char **d, const char *k, const char *v) +{ + if (git_config_string(d, k, v) < 0) + return -1; + return 1; +} + +static int parse_tristate(int *b, const char *k, const char *v) +{ + if (v && !strcasecmp(v, "auto")) + *b = -1; + else + *b = git_config_bool(k, v); + return 1; +} + +int userdiff_config(const char *k, const char *v) +{ + struct userdiff_driver *drv; + + if ((drv = parse_driver(k, v, "funcname"))) + return parse_funcname(&drv->funcname, k, v, 0); + if ((drv = parse_driver(k, v, "xfuncname"))) + return parse_funcname(&drv->funcname, k, v, REG_EXTENDED); + if ((drv = parse_driver(k, v, "binary"))) + return parse_tristate(&drv->binary, k, v); + if ((drv = parse_driver(k, v, "command"))) + return parse_string(&drv->external, k, v); + if ((drv = parse_driver(k, v, "textconv"))) + return parse_string(&drv->textconv, k, v); + if ((drv = parse_driver(k, v, "wordregex"))) + return parse_string(&drv->word_regex, k, v); + + return 0; +} + +struct userdiff_driver *userdiff_find_by_name(const char *name) { + int len = strlen(name); + return userdiff_find_by_namelen(name, len); +} + +struct userdiff_driver *userdiff_find_by_path(const char *path) +{ + static struct git_attr *attr; + struct git_attr_check check; + + if (!attr) + attr = git_attr("diff", 4); + check.attr = attr; + + if (!path) + return NULL; + if (git_checkattr(path, 1, &check)) + return NULL; + + if (ATTR_TRUE(check.value)) + return &driver_true; + if (ATTR_FALSE(check.value)) + return &driver_false; + if (ATTR_UNSET(check.value)) + return NULL; + return userdiff_find_by_name(check.value); +} |