[thirdparty/git.git] / userdiff.c

#include "cache.h"
#include "userdiff.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[ \t]+new|renames|is[ \t]+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#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
	 "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
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].*)$",
	 /* -- */
	 "[a-zA-Z][a-zA-Z0-9_]*"
	 "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
	 /* numbers and format statements like 2E14.4, or ES12.6, 9X.
	  * Don't worry about format statements without leading digits since
	  * they would have been matched above as a variable anyway. */
	 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
	 "|//|\\*\\*|::|[/<>=]="),
IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
	 "[^ \t-]+"),
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]*:[[:space:]]*($|/[/*])\n"
	 /* functions/methods, variables, and compounds at top level */
	 "^((::[[:space:]]*)?[A-Za-z_].*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
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	2	#include "userdiff.h"
be58e70d JK	3	#include "attr.h"
	4
	5	static struct userdiff_driver *drivers;
	6	static int ndrivers;
	7	static int drivers_alloc;
	8
ae3b970a	9	#define PATTERNS(name, pattern, word_regex) \
664d44ee JN	10	{ name, NULL, -1, { pattern, REG_EXTENDED }, \
664d44ee JN	11	word_regex "\|[^[:space:]]\|[\xc0-\xff][\x80-\xbf]+" }
909a5494	12	#define IPATTERN(name, pattern, word_regex) \
664d44ee JN	13	{ name, NULL, -1, { pattern, REG_EXTENDED \| REG_ICASE }, \
664d44ee JN	14	word_regex "\|[^[:space:]]\|[\xc0-\xff][\x80-\xbf]+" }
be58e70d	15	static struct userdiff_driver builtin_drivers[] = {
e90d065e	16	IPATTERN("ada",
39a87a29	17	"!^(.[ \t])?(is[ \t]+new\|renames\|is[ \t]+separate)([ \t].)?$\n"
e90d065e AJ	18	"!^[ \t]with[ \t].$\n"
	19	"^[ \t]((procedure\|function)[ \t]+.)$\n"
	20	"^[ \t]((package\|protected\|task)[ \t]+.)$",
	21	/* -- */
	22	"[a-zA-Z][a-zA-Z0-9_]*"
39a87a29	23	"\|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
e90d065e	24	"\|=>\|\\.\\.\|\\\\\|:=\|/=\|>=\|<=\|<<\|>>\|<>"),
909a5494 BC	25	IPATTERN("fortran",
	26	"!^([C]\|[ \t]!)\n"
	27	"!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
	28	"^[ \t]*((END[ \t]+)?(PROGRAM\|MODULE\|BLOCK[ \t]+DATA"
	29	"\|([^'\" \t]+[ \t]+)(SUBROUTINE\|FUNCTION))[ \t]+[A-Z].)$",
	30	/* -- */
	31	"[a-zA-Z][a-zA-Z0-9_]*"
	32	"\|\\.([Ee][Qq]\|[Nn][Ee]\|[Gg][TtEe]\|[Ll][TtEe]\|[Tt][Rr][Uu][Ee]\|[Ff][Aa][Ll][Ss][Ee]\|[Aa][Nn][Dd]\|[Oo][Rr]\|[Nn]?[Ee][Qq][Vv]\|[Nn][Oo][Tt])\\."
	33	/* numbers and format statements like 2E14.4, or ES12.6, 9X.
	34	* Don't worry about format statements without leading digits since
	35	* they would have been matched above as a variable anyway. */
	36	"\|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.])?(_[a-zA-Z0-9][a-zA-Z0-9_])?"
664d44ee	37	"\|//\|\\\\\|::\|[/<>=]="),
69f9c87d ZB	38	IPATTERN("fountain", "^((\\.[^.]\|(int\|ext\|est\|int\\.?/ext\|i/e)[. ]).*)$",
69f9c87d ZB	39	"[^ \t-]+"),
80c49c3d	40	PATTERNS("html", "^[ \t](<[Hh][1-6][ \t].>.*)$",
664d44ee	41	"[^<>= \t]+"),
80c49c3d	42	PATTERNS("java",
be58e70d	43	"!^[ \t]*(catch\|do\|for\|if\|instanceof\|new\|return\|switch\|throw\|while)\n"
959e2e64 PB	44	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$",
959e2e64 PB	45	/* -- */
80c49c3d TR	46	"[a-zA-Z_][a-zA-Z0-9_]*"
	47	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	48	"\|[-+*/<>%&^\|=!]="
664d44ee	49	"\|--\|\\+\\+\|<<=?\|>>>?=?\|&&\|\\\|\\\|"),
53b10a14 GH	50	PATTERNS("matlab",
	51	"^[[:space:]]((classdef\|function)[[:space:]].)$\|^%%[[:space:]].*$",
	52	"[a-zA-Z_][a-zA-Z0-9_]\|[-+0-9.e]+\|[=~<>]=\|\\.[/\\^']\|\\\|\\\|\|&&"),
80c49c3d	53	PATTERNS("objc",
be58e70d JK	54	/* Negate C statements that can look like functions */
	55	"!^[ \t]*(do\|for\|if\|else\|return\|switch\|while)\n"
	56	/* Objective-C methods */
	57	"^[ \t]([-+][ \t]\\([ \t][A-Za-z_][A-Za-z_0-9 \t]\\)[ \t][A-Za-z_].*)$\n"
	58	/* C functions */
959e2e64	59	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$\n"
be58e70d	60	/* Objective-C class/protocol definitions */
80c49c3d TR	61	"^(@(implementation\|interface\|protocol)[ \t].*)$",
	62	/* -- */
	63	"[a-zA-Z_][a-zA-Z0-9_]*"
	64	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee	65	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"),
80c49c3d	66	PATTERNS("pascal",
ad5b6942	67	"^(((class[ \t]+)?(procedure\|function)\|constructor\|destructor\|interface\|"
be58e70d JK	68	"implementation\|initialization\|finalization)[ \t].)$"
be58e70d JK	69	"\n"
80c49c3d TR	70	"^(.=[ \t](class\|record).*)$",
	71	/* -- */
	72	"[a-zA-Z_][a-zA-Z0-9_]*"
	73	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
664d44ee	74	"\|<>\|<=\|>=\|:=\|\\.\\."),
71a5d4bc	75	PATTERNS("perl",
ea2ca449 JN	76	"^package .*\n"
	77	"^sub [[:alnum:]_':]+[ \t]*"
	78	"(\\([^)]\\)[ \t])?" /* prototype */
	79	/*
	80	* Attributes. A regex can't count nested parentheses,
	81	* so just slurp up whatever we see, taking care not
	82	* to accept lines like "sub foo; # defined elsewhere".
	83	*
	84	* An attribute could contain a semicolon, but at that
	85	* point it seems reasonable enough to give up.
	86	*/
	87	"(:[^;#]*)?"
	88	"(\\{[ \t])?" / brace can come here or on the next line */
	89	"(#.)?$\n" / comment */
f143d9c6	90	"^(BEGIN\|END\|INIT\|CHECK\|UNITCHECK\|AUTOLOAD\|DESTROY)[ \t]*"
ea2ca449 JN	91	"(\\{[ \t])?" / brace can come here or on the next line */
ea2ca449 JN	92	"(#.*)?$\n"
12f0967a	93	"^=head[0-9] .", / POD */
71a5d4bc JN	94	/* -- */
	95	"[[:alpha:]_'][[:alnum:]_']*"
	96	"\|0[xb]?[0-9a-fA-F_]*"
	97	/* taking care not to interpret 3..5 as (3.)(.5) */
	98	"\|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
	99	"\|=>\|-[rwxoRWXOezsfdlpSugkbctTBMAC>]\|~~\|::"
	100	"\|&&=\|\\\|\\\|=\|//=\|\\\\="
	101	"\|&&\|\\\|\\\|\|//\|\\+\\+\|--\|\\\\\|\\.\\.\\.?"
	102	"\|[-+*/%.^&<>=!\|]="
	103	"\|=~\|!~"
664d44ee	104	"\|<<\|<>\|<=>\|>>"),
6d2f208c BS	105	PATTERNS("php",
	106	"^[\t ](((public\|protected\|private\|static)[\t ]+)function.*)$\n"
	107	"^[\t ](class.)$",
80c49c3d TR	108	/* -- */
	109	"[a-zA-Z_][a-zA-Z0-9_]*"
	110	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
664d44ee	111	"\|[-+*/<>%&^\|=!.]=\|--\|\\+\\+\|<<=?\|>>=?\|===\|&&\|\\\|\\\|\|::\|->"),
80c49c3d TR	112	PATTERNS("python", "^[ \t]((class\|def)[ \t].)$",
	113	/* -- */
	114	"[a-zA-Z_][a-zA-Z0-9_]*"
	115	"\|[-+0-9.e]+[jJlL]?\|0[xX]?[0-9a-fA-F]+[lL]?"
664d44ee	116	"\|[-+/<>%&^\|=!]=\|//=?\|<<=?\|>>=?\|\\\\*=?"),
80c49c3d TR	117	/* -- */
	118	PATTERNS("ruby", "^[ \t]((class\|module\|def)[ \t].)$",
	119	/* -- */
	120	"(@\|@@\|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
	121	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+\|\\?(\\\\C-)?(\\\\M-)?."
664d44ee	122	"\|//=?\|[-+*/<>%&^\|=!]=\|<<=?\|>>=?\|===\|\\.{1,3}\|::\|[!=]~"),
80c49c3d TR	123	PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]\\{{0,1}[ \t][^ \t\"@',\\#}{~%]).$",
	124	"[={}\"]\|[^={}\" \t]+"),
	125	PATTERNS("tex", "^(\\\\((sub)section\|chapter\|part)\\{0,1}\\{.*)$",
664d44ee	126	"\\\\[a-zA-Z@]+\|\\\\.\|[a-zA-Z0-9\x80-\xff]+"),
80c49c3d TR	127	PATTERNS("cpp",
80c49c3d TR	128	/* Jump targets or access declarations */
8a2e8da3 JS	129	"!^[ \t][A-Za-z_][A-Za-z_0-9]:[[:space:]]($\|/[/])\n"
	130	/* functions/methods, variables, and compounds at top level */
	131	"^((::[[:space:]])?[A-Za-z_].)$",
80c49c3d TR	132	/* -- */
80c49c3d TR	133	"[a-zA-Z_][a-zA-Z0-9_]*"
abf8f986	134	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
407e07f2	135	"\|[-+/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->\\?\|\\.\\*"),
b221207d PO	136	PATTERNS("csharp",
	137	/* Keywords */
	138	"!^[ \t]*(do\|while\|for\|if\|else\|instanceof\|new\|return\|switch\|case\|throw\|catch\|using)\n"
	139	/* Methods and constructors */
	140	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]\\(.\\))[ \t]*$\n"
	141	/* Properties */
	142	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
	143	/* Type definitions */
	144	"^[ \t](((static\|public\|internal\|private\|protected\|new\|unsafe\|sealed\|abstract\|partial)[ \t]+)(class\|enum\|interface\|struct)[ \t]+.*)$\n"
	145	/* Namespace */
	146	"^[ \t](namespace[ \t]+.)$",
	147	/* -- */
	148	"[a-zA-Z_][a-zA-Z0-9_]*"
	149	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee	150	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"),
122aa6f9	151	{ "default", NULL, -1, { NULL, 0 } },
be58e70d	152	};
80c49c3d	153	#undef PATTERNS
909a5494	154	#undef IPATTERN
be58e70d JK	155
	156	static struct userdiff_driver driver_true = {
	157	"diff=true",
	158	NULL,
122aa6f9	159	0,
be58e70d JK	160	{ NULL, 0 }
be58e70d JK	161	};
be58e70d JK	162
	163	static struct userdiff_driver driver_false = {
	164	"!diff",
	165	NULL,
122aa6f9	166	1,
be58e70d JK	167	{ NULL, 0 }
be58e70d JK	168	};
be58e70d JK	169
	170	static struct userdiff_driver userdiff_find_by_namelen(const char k, int len)
	171	{
	172	int i;
	173	for (i = 0; i < ndrivers; i++) {
	174	struct userdiff_driver *drv = drivers + i;
	175	if (!strncmp(drv->name, k, len) && !drv->name[len])
	176	return drv;
	177	}
	178	for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
	179	struct userdiff_driver *drv = builtin_drivers + i;
	180	if (!strncmp(drv->name, k, len) && !drv->name[len])
	181	return drv;
	182	}
	183	return NULL;
	184	}
	185
be58e70d JK	186	static int parse_funcname(struct userdiff_funcname f, const char k,
	187	const char *v, int cflags)
	188	{
	189	if (git_config_string(&f->pattern, k, v) < 0)
	190	return -1;
	191	f->cflags = cflags;
6680a087	192	return 0;
be58e70d JK	193	}
be58e70d JK	194
122aa6f9 JK	195	static int parse_tristate(int b, const char k, const char *v)
	196	{
	197	if (v && !strcasecmp(v, "auto"))
	198	*b = -1;
	199	else
	200	*b = git_config_bool(k, v);
6680a087	201	return 0;
122aa6f9 JK	202	}
122aa6f9 JK	203
d9bae1a1 JK	204	static int parse_bool(int b, const char k, const char *v)
	205	{
	206	*b = git_config_bool(k, v);
6680a087	207	return 0;
d9bae1a1 JK	208	}
d9bae1a1 JK	209
c7534ef4	210	int userdiff_config(const char k, const char v)
be58e70d JK	211	{
be58e70d JK	212	struct userdiff_driver *drv;
0a5987fe JK	213	const char name, type;
	214	int namelen;
	215
	216	if (parse_config_key(k, "diff", &name, &namelen, &type) \|\| !name)
	217	return 0;
	218
	219	drv = userdiff_find_by_namelen(name, namelen);
	220	if (!drv) {
	221	ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
	222	drv = &drivers[ndrivers++];
	223	memset(drv, 0, sizeof(*drv));
	224	drv->name = xmemdupz(name, namelen);
	225	drv->binary = -1;
	226	}
be58e70d	227
0a5987fe	228	if (!strcmp(type, "funcname"))
be58e70d	229	return parse_funcname(&drv->funcname, k, v, 0);
0a5987fe	230	if (!strcmp(type, "xfuncname"))
be58e70d	231	return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
0a5987fe	232	if (!strcmp(type, "binary"))
122aa6f9	233	return parse_tristate(&drv->binary, k, v);
0a5987fe	234	if (!strcmp(type, "command"))
6680a087	235	return git_config_string(&drv->external, k, v);
0a5987fe	236	if (!strcmp(type, "textconv"))
6680a087	237	return git_config_string(&drv->textconv, k, v);
0a5987fe	238	if (!strcmp(type, "cachetextconv"))
d9bae1a1	239	return parse_bool(&drv->textconv_want_cache, k, v);
0a5987fe	240	if (!strcmp(type, "wordregex"))
6680a087	241	return git_config_string(&drv->word_regex, k, v);
be58e70d JK	242
	243	return 0;
	244	}
	245
	246	struct userdiff_driver userdiff_find_by_name(const char name) {
	247	int len = strlen(name);
	248	return userdiff_find_by_namelen(name, len);
	249	}
	250
	251	struct userdiff_driver userdiff_find_by_path(const char path)
	252	{
	253	static struct git_attr *attr;
	254	struct git_attr_check check;
	255
	256	if (!attr)
7fb0eaa2	257	attr = git_attr("diff");
be58e70d JK	258	check.attr = attr;
	259
	260	if (!path)
	261	return NULL;
d932f4eb	262	if (git_check_attr(path, 1, &check))
be58e70d JK	263	return NULL;
	264
	265	if (ATTR_TRUE(check.value))
	266	return &driver_true;
	267	if (ATTR_FALSE(check.value))
	268	return &driver_false;
	269	if (ATTR_UNSET(check.value))
	270	return NULL;
	271	return userdiff_find_by_name(check.value);
	272	}
3813e690 JK	273
	274	struct userdiff_driver userdiff_get_textconv(struct userdiff_driver driver)
	275	{
	276	if (!driver->textconv)
	277	return NULL;
	278
	279	if (driver->textconv_want_cache && !driver->textconv_cache) {
	280	struct notes_cache c = xmalloc(sizeof(c));
	281	struct strbuf name = STRBUF_INIT;
	282
	283	strbuf_addf(&name, "textconv/%s", driver->name);
	284	notes_cache_init(c, name.buf, driver->textconv);
	285	driver->textconv_cache = c;
	286	}
	287
	288	return driver;
	289	}