[thirdparty/git.git] / userdiff.c

#include "cache.h"
#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 "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
#define IPATTERN(name, pattern, word_regex)			\
	{ name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \
	  word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
static struct userdiff_driver builtin_drivers[] = {
IPATTERN("ada",
	 "!^(.*[ \t])?(is new|renames|is separate)([ \t].*)?$\n"
	 "!^[ \t]*with[ \t].*$\n"
	 "^[ \t]*((procedure|function)[ \t]+.*)$\n"
	 "^[ \t]*((package|protected|task)[ \t]+.*)$",
	 /* -- */
	 "[a-zA-Z][a-zA-Z0-9_]*"
	 "|[0-9][-+0-9#_.eE]"
	 "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
IPATTERN("fortran",
	 "!^([C*]|[ \t]*!)\n"
	 "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
	 "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
		"|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
	 /* -- */
	 "[a-zA-Z][a-zA-Z0-9_]*"
	 "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
	 /* numbers and format statements like 2E14.4, or ES12.6, 9X.
	  * Don't worry about format statements without leading digits since
	  * they would have been matched above as a variable anyway. */
	 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
	 "|//|\\*\\*|::|[/<>=]="),
PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
	 "[^<>= \t]+"),
PATTERNS("java",
	 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
	 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]="
	 "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
PATTERNS("matlab",
	 "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
	 "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
PATTERNS("objc",
	 /* Negate C statements that can look like functions */
	 "!^[ \t]*(do|for|if|else|return|switch|while)\n"
	 /* Objective-C methods */
	 "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
	 /* C functions */
	 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \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]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
PATTERNS("pascal",
	 "^(((class[ \t]+)?(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]+"
	 "|<>|<=|>=|:=|\\.\\."),
PATTERNS("perl",
	 "^package .*\n"
	 "^sub [[:alnum:]_':]+[ \t]*"
		"(\\([^)]*\\)[ \t]*)?" /* prototype */
		/*
		 * Attributes.  A regex can't count nested parentheses,
		 * so just slurp up whatever we see, taking care not
		 * to accept lines like "sub foo; # defined elsewhere".
		 *
		 * An attribute could contain a semicolon, but at that
		 * point it seems reasonable enough to give up.
		 */
		"(:[^;#]*)?"
		"(\\{[ \t]*)?" /* brace can come here or on the next line */
		"(#.*)?$\n" /* comment */
	 "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
		"(\\{[ \t]*)?" /* brace can come here or on the next line */
		"(#.*)?$\n"
	 "^=head[0-9] .*",	/* POD */
	 /* -- */
	 "[[:alpha:]_'][[:alnum:]_']*"
	 "|0[xb]?[0-9a-fA-F_]*"
	 /* taking care not to interpret 3..5 as (3.)(.5) */
	 "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
	 "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
	 "|&&=|\\|\\|=|//=|\\*\\*="
	 "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
	 "|[-+*/%.^&<>=!|]="
	 "|=~|!~"
	 "|<<|<>|<=>|>>"),
PATTERNS("php",
	 "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
	 "^[\t ]*(class.*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
	 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
	 /* -- */
PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
	 /* -- */
	 "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
	 "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
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]+"),
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)[^;]*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
PATTERNS("csharp",
	 /* Keywords */
	 "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
	 /* Methods and constructors */
	 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
	 /* Properties */
	 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
	 /* Type definitions */
	 "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
	 /* Namespace */
	 "^[ \t]*(namespace[ \t]+.*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
{ "default", NULL, -1, { NULL, 0 } },
};
#undef PATTERNS
#undef IPATTERN

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 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 0;
}

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 0;
}

static int parse_bool(int *b, const char *k, const char *v)
{
	*b = git_config_bool(k, v);
	return 0;
}

int userdiff_config(const char *k, const char *v)
{
	struct userdiff_driver *drv;
	const char *name, *type;
	int namelen;

	if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
		return 0;

	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;
	}

	if (!strcmp(type, "funcname"))
		return parse_funcname(&drv->funcname, k, v, 0);
	if (!strcmp(type, "xfuncname"))
		return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
	if (!strcmp(type, "binary"))
		return parse_tristate(&drv->binary, k, v);
	if (!strcmp(type, "command"))
		return git_config_string(&drv->external, k, v);
	if (!strcmp(type, "textconv"))
		return git_config_string(&drv->textconv, k, v);
	if (!strcmp(type, "cachetextconv"))
		return parse_bool(&drv->textconv_want_cache, k, v);
	if (!strcmp(type, "wordregex"))
		return git_config_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");
	check.attr = attr;

	if (!path)
		return NULL;
	if (git_check_attr(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);
}

struct userdiff_driver *userdiff_get_textconv(struct userdiff_driver *driver)
{
	if (!driver->textconv)
		return NULL;

	if (driver->textconv_want_cache && !driver->textconv_cache) {
		struct notes_cache *c = xmalloc(sizeof(*c));
		struct strbuf name = STRBUF_INIT;

		strbuf_addf(&name, "textconv/%s", driver->name);
		notes_cache_init(c, name.buf, driver->textconv);
		driver->textconv_cache = c;
	}

	return driver;
}
Commit	Line	Data
d9bae1a1	1	#include "cache.h"
be58e70d JK	2	#include "userdiff.h"
	3	#include "cache.h"
	4	#include "attr.h"
	5
	6	static struct userdiff_driver *drivers;
	7	static int ndrivers;
	8	static int drivers_alloc;
	9
ae3b970a	10	#define PATTERNS(name, pattern, word_regex) \
664d44ee JN	11	{ name, NULL, -1, { pattern, REG_EXTENDED }, \
664d44ee JN	12	word_regex "\|[^[:space:]]\|[\xc0-\xff][\x80-\xbf]+" }
909a5494	13	#define IPATTERN(name, pattern, word_regex) \
664d44ee JN	14	{ name, NULL, -1, { pattern, REG_EXTENDED \| REG_ICASE }, \
664d44ee JN	15	word_regex "\|[^[:space:]]\|[\xc0-\xff][\x80-\xbf]+" }
be58e70d	16	static struct userdiff_driver builtin_drivers[] = {
e90d065e AJ	17	IPATTERN("ada",
	18	"!^(.[ \t])?(is new\|renames\|is separate)([ \t].)?$\n"
	19	"!^[ \t]with[ \t].$\n"
	20	"^[ \t]((procedure\|function)[ \t]+.)$\n"
	21	"^[ \t]((package\|protected\|task)[ \t]+.)$",
	22	/* -- */
	23	"[a-zA-Z][a-zA-Z0-9_]*"
	24	"\|[0-9][-+0-9#_.eE]"
	25	"\|=>\|\\.\\.\|\\\\\|:=\|/=\|>=\|<=\|<<\|>>\|<>"),
909a5494 BC	26	IPATTERN("fortran",
	27	"!^([C]\|[ \t]!)\n"
	28	"!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
	29	"^[ \t]*((END[ \t]+)?(PROGRAM\|MODULE\|BLOCK[ \t]+DATA"
	30	"\|([^'\" \t]+[ \t]+)(SUBROUTINE\|FUNCTION))[ \t]+[A-Z].)$",
	31	/* -- */
	32	"[a-zA-Z][a-zA-Z0-9_]*"
	33	"\|\\.([Ee][Qq]\|[Nn][Ee]\|[Gg][TtEe]\|[Ll][TtEe]\|[Tt][Rr][Uu][Ee]\|[Ff][Aa][Ll][Ss][Ee]\|[Aa][Nn][Dd]\|[Oo][Rr]\|[Nn]?[Ee][Qq][Vv]\|[Nn][Oo][Tt])\\."
	34	/* numbers and format statements like 2E14.4, or ES12.6, 9X.
	35	* Don't worry about format statements without leading digits since
	36	* they would have been matched above as a variable anyway. */
	37	"\|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.])?(_[a-zA-Z0-9][a-zA-Z0-9_])?"
664d44ee	38	"\|//\|\\\\\|::\|[/<>=]="),
80c49c3d	39	PATTERNS("html", "^[ \t](<[Hh][1-6][ \t].>.*)$",
664d44ee	40	"[^<>= \t]+"),
80c49c3d	41	PATTERNS("java",
be58e70d	42	"!^[ \t]*(catch\|do\|for\|if\|instanceof\|new\|return\|switch\|throw\|while)\n"
959e2e64 PB	43	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$",
959e2e64 PB	44	/* -- */
80c49c3d TR	45	"[a-zA-Z_][a-zA-Z0-9_]*"
	46	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	47	"\|[-+*/<>%&^\|=!]="
664d44ee	48	"\|--\|\\+\\+\|<<=?\|>>>?=?\|&&\|\\\|\\\|"),
53b10a14 GH	49	PATTERNS("matlab",
	50	"^[[:space:]]((classdef\|function)[[:space:]].)$\|^%%[[:space:]].*$",
	51	"[a-zA-Z_][a-zA-Z0-9_]\|[-+0-9.e]+\|[=~<>]=\|\\.[/\\^']\|\\\|\\\|\|&&"),
80c49c3d	52	PATTERNS("objc",
be58e70d JK	53	/* Negate C statements that can look like functions */
	54	"!^[ \t]*(do\|for\|if\|else\|return\|switch\|while)\n"
	55	/* Objective-C methods */
	56	"^[ \t]([-+][ \t]\\([ \t][A-Za-z_][A-Za-z_0-9 \t]\\)[ \t][A-Za-z_].*)$\n"
	57	/* C functions */
959e2e64	58	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$\n"
be58e70d	59	/* Objective-C class/protocol definitions */
80c49c3d TR	60	"^(@(implementation\|interface\|protocol)[ \t].*)$",
	61	/* -- */
	62	"[a-zA-Z_][a-zA-Z0-9_]*"
	63	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee	64	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"),
80c49c3d	65	PATTERNS("pascal",
ad5b6942	66	"^(((class[ \t]+)?(procedure\|function)\|constructor\|destructor\|interface\|"
be58e70d JK	67	"implementation\|initialization\|finalization)[ \t].)$"
be58e70d JK	68	"\n"
80c49c3d TR	69	"^(.=[ \t](class\|record).*)$",
	70	/* -- */
	71	"[a-zA-Z_][a-zA-Z0-9_]*"
	72	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
664d44ee	73	"\|<>\|<=\|>=\|:=\|\\.\\."),
71a5d4bc	74	PATTERNS("perl",
ea2ca449 JN	75	"^package .*\n"
	76	"^sub [[:alnum:]_':]+[ \t]*"
	77	"(\\([^)]\\)[ \t])?" /* prototype */
	78	/*
	79	* Attributes. A regex can't count nested parentheses,
	80	* so just slurp up whatever we see, taking care not
	81	* to accept lines like "sub foo; # defined elsewhere".
	82	*
	83	* An attribute could contain a semicolon, but at that
	84	* point it seems reasonable enough to give up.
	85	*/
	86	"(:[^;#]*)?"
	87	"(\\{[ \t])?" / brace can come here or on the next line */
	88	"(#.)?$\n" / comment */
f143d9c6	89	"^(BEGIN\|END\|INIT\|CHECK\|UNITCHECK\|AUTOLOAD\|DESTROY)[ \t]*"
ea2ca449 JN	90	"(\\{[ \t])?" / brace can come here or on the next line */
ea2ca449 JN	91	"(#.*)?$\n"
12f0967a	92	"^=head[0-9] .", / POD */
71a5d4bc JN	93	/* -- */
	94	"[[:alpha:]_'][[:alnum:]_']*"
	95	"\|0[xb]?[0-9a-fA-F_]*"
	96	/* taking care not to interpret 3..5 as (3.)(.5) */
	97	"\|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
	98	"\|=>\|-[rwxoRWXOezsfdlpSugkbctTBMAC>]\|~~\|::"
	99	"\|&&=\|\\\|\\\|=\|//=\|\\\\="
	100	"\|&&\|\\\|\\\|\|//\|\\+\\+\|--\|\\\\\|\\.\\.\\.?"
	101	"\|[-+*/%.^&<>=!\|]="
	102	"\|=~\|!~"
664d44ee	103	"\|<<\|<>\|<=>\|>>"),
6d2f208c BS	104	PATTERNS("php",
	105	"^[\t ](((public\|protected\|private\|static)[\t ]+)function.*)$\n"
	106	"^[\t ](class.)$",
80c49c3d TR	107	/* -- */
	108	"[a-zA-Z_][a-zA-Z0-9_]*"
	109	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
664d44ee	110	"\|[-+*/<>%&^\|=!.]=\|--\|\\+\\+\|<<=?\|>>=?\|===\|&&\|\\\|\\\|\|::\|->"),
80c49c3d TR	111	PATTERNS("python", "^[ \t]((class\|def)[ \t].)$",
	112	/* -- */
	113	"[a-zA-Z_][a-zA-Z0-9_]*"
	114	"\|[-+0-9.e]+[jJlL]?\|0[xX]?[0-9a-fA-F]+[lL]?"
664d44ee	115	"\|[-+/<>%&^\|=!]=\|//=?\|<<=?\|>>=?\|\\\\*=?"),
80c49c3d TR	116	/* -- */
	117	PATTERNS("ruby", "^[ \t]((class\|module\|def)[ \t].)$",
	118	/* -- */
	119	"(@\|@@\|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
	120	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+\|\\?(\\\\C-)?(\\\\M-)?."
664d44ee	121	"\|//=?\|[-+*/<>%&^\|=!]=\|<<=?\|>>=?\|===\|\\.{1,3}\|::\|[!=]~"),
80c49c3d TR	122	PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]\\{{0,1}[ \t][^ \t\"@',\\#}{~%]).$",
	123	"[={}\"]\|[^={}\" \t]+"),
	124	PATTERNS("tex", "^(\\\\((sub)section\|chapter\|part)\\{0,1}\\{.*)$",
664d44ee	125	"\\\\[a-zA-Z@]+\|\\\\.\|[a-zA-Z0-9\x80-\xff]+"),
80c49c3d TR	126	PATTERNS("cpp",
	127	/* Jump targets or access declarations */
	128	"!^[ \t][A-Za-z_][A-Za-z_0-9]:.*$\n"
	129	/* C/++ functions/methods at top level */
37e7793d	130	"^([A-Za-z_][A-Za-z_0-9]([ \t]+[A-Za-z_][A-Za-z_0-9]([ \t]::[ \t][^[:space:]]+)?){1,}[ \t]\\([^;]*)$\n"
80c49c3d TR	131	/* compound type at top level */
	132	"^((struct\|class\|enum)[^;]*)$",
	133	/* -- */
	134	"[a-zA-Z_][a-zA-Z0-9_]*"
	135	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee	136	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"),
b221207d PO	137	PATTERNS("csharp",
	138	/* Keywords */
	139	"!^[ \t]*(do\|while\|for\|if\|else\|instanceof\|new\|return\|switch\|case\|throw\|catch\|using)\n"
	140	/* Methods and constructors */
	141	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]\\(.\\))[ \t]*$\n"
	142	/* Properties */
	143	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
	144	/* Type definitions */
	145	"^[ \t](((static\|public\|internal\|private\|protected\|new\|unsafe\|sealed\|abstract\|partial)[ \t]+)(class\|enum\|interface\|struct)[ \t]+.*)$\n"
	146	/* Namespace */
	147	"^[ \t](namespace[ \t]+.)$",
	148	/* -- */
	149	"[a-zA-Z_][a-zA-Z0-9_]*"
	150	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee	151	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"),
122aa6f9	152	{ "default", NULL, -1, { NULL, 0 } },
be58e70d	153	};
80c49c3d	154	#undef PATTERNS
909a5494	155	#undef IPATTERN
be58e70d JK	156
	157	static struct userdiff_driver driver_true = {
	158	"diff=true",
	159	NULL,
122aa6f9	160	0,
be58e70d JK	161	{ NULL, 0 }
be58e70d JK	162	};
be58e70d JK	163
	164	static struct userdiff_driver driver_false = {
	165	"!diff",
	166	NULL,
122aa6f9	167	1,
be58e70d JK	168	{ NULL, 0 }
be58e70d JK	169	};
be58e70d JK	170
	171	static struct userdiff_driver userdiff_find_by_namelen(const char k, int len)
	172	{
	173	int i;
	174	for (i = 0; i < ndrivers; i++) {
	175	struct userdiff_driver *drv = drivers + i;
	176	if (!strncmp(drv->name, k, len) && !drv->name[len])
	177	return drv;
	178	}
	179	for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
	180	struct userdiff_driver *drv = builtin_drivers + i;
	181	if (!strncmp(drv->name, k, len) && !drv->name[len])
	182	return drv;
	183	}
	184	return NULL;
	185	}
	186
be58e70d JK	187	static int parse_funcname(struct userdiff_funcname f, const char k,
	188	const char *v, int cflags)
	189	{
	190	if (git_config_string(&f->pattern, k, v) < 0)
	191	return -1;
	192	f->cflags = cflags;
6680a087	193	return 0;
be58e70d JK	194	}
be58e70d JK	195
122aa6f9 JK	196	static int parse_tristate(int b, const char k, const char *v)
	197	{
	198	if (v && !strcasecmp(v, "auto"))
	199	*b = -1;
	200	else
	201	*b = git_config_bool(k, v);
6680a087	202	return 0;
122aa6f9 JK	203	}
122aa6f9 JK	204
d9bae1a1 JK	205	static int parse_bool(int b, const char k, const char *v)
	206	{
	207	*b = git_config_bool(k, v);
6680a087	208	return 0;
d9bae1a1 JK	209	}
d9bae1a1 JK	210
c7534ef4	211	int userdiff_config(const char k, const char v)
be58e70d JK	212	{
be58e70d JK	213	struct userdiff_driver *drv;
0a5987fe JK	214	const char name, type;
	215	int namelen;
	216
	217	if (parse_config_key(k, "diff", &name, &namelen, &type) \|\| !name)
	218	return 0;
	219
	220	drv = userdiff_find_by_namelen(name, namelen);
	221	if (!drv) {
	222	ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
	223	drv = &drivers[ndrivers++];
	224	memset(drv, 0, sizeof(*drv));
	225	drv->name = xmemdupz(name, namelen);
	226	drv->binary = -1;
	227	}
be58e70d	228
0a5987fe	229	if (!strcmp(type, "funcname"))
be58e70d	230	return parse_funcname(&drv->funcname, k, v, 0);
0a5987fe	231	if (!strcmp(type, "xfuncname"))
be58e70d	232	return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
0a5987fe	233	if (!strcmp(type, "binary"))
122aa6f9	234	return parse_tristate(&drv->binary, k, v);
0a5987fe	235	if (!strcmp(type, "command"))
6680a087	236	return git_config_string(&drv->external, k, v);
0a5987fe	237	if (!strcmp(type, "textconv"))
6680a087	238	return git_config_string(&drv->textconv, k, v);
0a5987fe	239	if (!strcmp(type, "cachetextconv"))
d9bae1a1	240	return parse_bool(&drv->textconv_want_cache, k, v);
0a5987fe	241	if (!strcmp(type, "wordregex"))
6680a087	242	return git_config_string(&drv->word_regex, k, v);
be58e70d JK	243
	244	return 0;
	245	}
	246
	247	struct userdiff_driver userdiff_find_by_name(const char name) {
	248	int len = strlen(name);
	249	return userdiff_find_by_namelen(name, len);
	250	}
	251
	252	struct userdiff_driver userdiff_find_by_path(const char path)
	253	{
	254	static struct git_attr *attr;
	255	struct git_attr_check check;
	256
	257	if (!attr)
7fb0eaa2	258	attr = git_attr("diff");
be58e70d JK	259	check.attr = attr;
	260
	261	if (!path)
	262	return NULL;
d932f4eb	263	if (git_check_attr(path, 1, &check))
be58e70d JK	264	return NULL;
	265
	266	if (ATTR_TRUE(check.value))
	267	return &driver_true;
	268	if (ATTR_FALSE(check.value))
	269	return &driver_false;
	270	if (ATTR_UNSET(check.value))
	271	return NULL;
	272	return userdiff_find_by_name(check.value);
	273	}
3813e690 JK	274
	275	struct userdiff_driver userdiff_get_textconv(struct userdiff_driver driver)
	276	{
	277	if (!driver->textconv)
	278	return NULL;
	279
	280	if (driver->textconv_want_cache && !driver->textconv_cache) {
	281	struct notes_cache c = xmalloc(sizeof(c));
	282	struct strbuf name = STRBUF_INIT;
	283
	284	strbuf_addf(&name, "textconv/%s", driver->name);
	285	notes_cache_init(c, name.buf, driver->textconv);
	286	driver->textconv_cache = c;
	287	}
	288
	289	return driver;
	290	}