[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 }
#define IPATTERN(name, pattern, word_regex)			\
	{ name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, word_regex }
static struct userdiff_driver builtin_drivers[] = {
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].*)$",
	 /* -- */
	 "[a-zA-Z][a-zA-Z0-9_]*"
	 "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
	 /* numbers and format statements like 2E14.4, or ES12.6, 9X.
	  * Don't worry about format statements without leading digits since
	  * they would have been matched above as a variable anyway. */
	 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
	 "|//|\\*\\*|::|[/<>=]="
	 "|[^[:space:]]|[\x80-\xff]+"),
PATTERNS("html", "^[ \t]*(<[Hh][1-6][ \t].*>.*)$",
	 "[^<>= \t]+|[^[:space:]]|[\x80-\xff]+"),
PATTERNS("java",
	 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
	 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]="
	 "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"
	 "|[^[:space:]]|[\x80-\xff]+"),
PATTERNS("objc",
	 /* Negate C statements that can look like functions */
	 "!^[ \t]*(do|for|if|else|return|switch|while)\n"
	 /* Objective-C methods */
	 "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
	 /* C functions */
	 "^[ \t]*(([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]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
	 "|[^[: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 ]*(((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]+"
	 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"
	 "|[^[: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)[^;]*)$",
	 /* -- */
	 "[a-zA-Z_][a-zA-Z0-9_]*"
	 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
	 "|[^[:space:]]|[\x80-\xff]+"),
PATTERNS("csharp",
	 /* Keywords */
	 "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
	 /* Methods and constructors */
	 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\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]?"
	 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"
	 "|[^[:space:]]|[\x80-\xff]+"),
{ "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 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;
}

static int parse_bool(int *b, const char *k, const char *v)
{
	*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, "cachetextconv")))
		return parse_bool(&drv->textconv_want_cache, 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");
	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);
}
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 BSSJ	10	#define PATTERNS(name, pattern, word_regex) \
ae3b970a BSSJ	11	{ name, NULL, -1, { pattern, REG_EXTENDED }, word_regex }
909a5494 BC	12	#define IPATTERN(name, pattern, word_regex) \
909a5494 BC	13	{ name, NULL, -1, { pattern, REG_EXTENDED \| REG_ICASE }, word_regex }
be58e70d	14	static struct userdiff_driver builtin_drivers[] = {
909a5494 BC	15	IPATTERN("fortran",
	16	"!^([C]\|[ \t]!)\n"
	17	"!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
	18	"^[ \t]*((END[ \t]+)?(PROGRAM\|MODULE\|BLOCK[ \t]+DATA"
	19	"\|([^'\" \t]+[ \t]+)(SUBROUTINE\|FUNCTION))[ \t]+[A-Z].)$",
	20	/* -- */
	21	"[a-zA-Z][a-zA-Z0-9_]*"
	22	"\|\\.([Ee][Qq]\|[Nn][Ee]\|[Gg][TtEe]\|[Ll][TtEe]\|[Tt][Rr][Uu][Ee]\|[Ff][Aa][Ll][Ss][Ee]\|[Aa][Nn][Dd]\|[Oo][Rr]\|[Nn]?[Ee][Qq][Vv]\|[Nn][Oo][Tt])\\."
	23	/* numbers and format statements like 2E14.4, or ES12.6, 9X.
	24	* Don't worry about format statements without leading digits since
	25	* they would have been matched above as a variable anyway. */
	26	"\|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.])?(_[a-zA-Z0-9][a-zA-Z0-9_])?"
	27	"\|//\|\\\\\|::\|[/<>=]="
	28	"\|[^[:space:]]\|[\x80-\xff]+"),
80c49c3d TR	29	PATTERNS("html", "^[ \t](<[Hh][1-6][ \t].>.*)$",
	30	"[^<>= \t]+\|[^[:space:]]\|[\x80-\xff]+"),
	31	PATTERNS("java",
be58e70d	32	"!^[ \t]*(catch\|do\|for\|if\|instanceof\|new\|return\|switch\|throw\|while)\n"
959e2e64 PB	33	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$",
959e2e64 PB	34	/* -- */
80c49c3d TR	35	"[a-zA-Z_][a-zA-Z0-9_]*"
	36	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	37	"\|[-+*/<>%&^\|=!]="
	38	"\|--\|\\+\\+\|<<=?\|>>>?=?\|&&\|\\\|\\\|"
	39	"\|[^[:space:]]\|[\x80-\xff]+"),
	40	PATTERNS("objc",
be58e70d JK	41	/* Negate C statements that can look like functions */
	42	"!^[ \t]*(do\|for\|if\|else\|return\|switch\|while)\n"
	43	/* Objective-C methods */
	44	"^[ \t]([-+][ \t]\\([ \t][A-Za-z_][A-Za-z_0-9 \t]\\)[ \t][A-Za-z_].*)$\n"
	45	/* C functions */
959e2e64	46	"^[ \t](([A-Za-z_][A-Za-z_0-9][ \t]+)+[A-Za-z_][A-Za-z_0-9][ \t]\\([^;]*)$\n"
be58e70d	47	/* Objective-C class/protocol definitions */
80c49c3d TR	48	"^(@(implementation\|interface\|protocol)[ \t].*)$",
	49	/* -- */
	50	"[a-zA-Z_][a-zA-Z0-9_]*"
	51	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	52	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"
	53	"\|[^[:space:]]\|[\x80-\xff]+"),
	54	PATTERNS("pascal",
be58e70d JK	55	"^((procedure\|function\|constructor\|destructor\|interface\|"
	56	"implementation\|initialization\|finalization)[ \t].)$"
	57	"\n"
80c49c3d TR	58	"^(.=[ \t](class\|record).*)$",
	59	/* -- */
	60	"[a-zA-Z_][a-zA-Z0-9_]*"
	61	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
	62	"\|<>\|<=\|>=\|:=\|\\.\\."
	63	"\|[^[:space:]]\|[\x80-\xff]+"),
6d2f208c BS	64	PATTERNS("php",
	65	"^[\t ](((public\|protected\|private\|static)[\t ]+)function.*)$\n"
	66	"^[\t ](class.)$",
80c49c3d TR	67	/* -- */
	68	"[a-zA-Z_][a-zA-Z0-9_]*"
	69	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+"
	70	"\|[-+*/<>%&^\|=!.]=\|--\|\\+\\+\|<<=?\|>>=?\|===\|&&\|\\\|\\\|\|::\|->"
	71	"\|[^[:space:]]\|[\x80-\xff]+"),
	72	PATTERNS("python", "^[ \t]((class\|def)[ \t].)$",
	73	/* -- */
	74	"[a-zA-Z_][a-zA-Z0-9_]*"
	75	"\|[-+0-9.e]+[jJlL]?\|0[xX]?[0-9a-fA-F]+[lL]?"
	76	"\|[-+/<>%&^\|=!]=\|//=?\|<<=?\|>>=?\|\\\\*=?"
	77	"\|[^[:space:]\|[\x80-\xff]+"),
	78	/* -- */
	79	PATTERNS("ruby", "^[ \t]((class\|module\|def)[ \t].)$",
	80	/* -- */
	81	"(@\|@@\|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
	82	"\|[-+0-9.e]+\|0[xXbB]?[0-9a-fA-F]+\|\\?(\\\\C-)?(\\\\M-)?."
	83	"\|//=?\|[-+*/<>%&^\|=!]=\|<<=?\|>>=?\|===\|\\.{1,3}\|::\|[!=]~"
	84	"\|[^[:space:]\|[\x80-\xff]+"),
	85	PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]\\{{0,1}[ \t][^ \t\"@',\\#}{~%]).$",
	86	"[={}\"]\|[^={}\" \t]+"),
	87	PATTERNS("tex", "^(\\\\((sub)section\|chapter\|part)\\{0,1}\\{.*)$",
	88	"\\\\[a-zA-Z@]+\|\\\\.\|[a-zA-Z0-9\x80-\xff]+\|[^[:space:]]"),
	89	PATTERNS("cpp",
	90	/* Jump targets or access declarations */
	91	"!^[ \t][A-Za-z_][A-Za-z_0-9]:.*$\n"
	92	/* C/++ functions/methods at top level */
	93	"^([A-Za-z_][A-Za-z_0-9]([ \t]+[A-Za-z_][A-Za-z_0-9]([ \t]::[ \t][^[:space:]]+)?){1,}[ \t]\\([^;])$\n"
	94	/* compound type at top level */
	95	"^((struct\|class\|enum)[^;]*)$",
	96	/* -- */
	97	"[a-zA-Z_][a-zA-Z0-9_]*"
	98	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	99	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"
	100	"\|[^[:space:]]\|[\x80-\xff]+"),
b221207d PO	101	PATTERNS("csharp",
	102	/* Keywords */
	103	"!^[ \t]*(do\|while\|for\|if\|else\|instanceof\|new\|return\|switch\|case\|throw\|catch\|using)\n"
	104	/* Methods and constructors */
	105	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]\\(.\\))[ \t]*$\n"
	106	/* Properties */
	107	"^[ \t](((static\|public\|internal\|private\|protected\|new\|virtual\|sealed\|override\|unsafe)[ \t]+)[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
	108	/* Type definitions */
	109	"^[ \t](((static\|public\|internal\|private\|protected\|new\|unsafe\|sealed\|abstract\|partial)[ \t]+)(class\|enum\|interface\|struct)[ \t]+.*)$\n"
	110	/* Namespace */
	111	"^[ \t](namespace[ \t]+.)$",
	112	/* -- */
	113	"[a-zA-Z_][a-zA-Z0-9_]*"
	114	"\|[-+0-9.e]+[fFlL]?\|0[xXbB]?[0-9a-fA-F]+[lL]?"
	115	"\|[-+*/<>%&^\|=!]=\|--\|\\+\\+\|<<=?\|>>=?\|&&\|\\\|\\\|\|::\|->"
	116	"\|[^[:space:]]\|[\x80-\xff]+"),
122aa6f9	117	{ "default", NULL, -1, { NULL, 0 } },
be58e70d	118	};
80c49c3d	119	#undef PATTERNS
909a5494	120	#undef IPATTERN
be58e70d JK	121
	122	static struct userdiff_driver driver_true = {
	123	"diff=true",
	124	NULL,
122aa6f9	125	0,
be58e70d JK	126	{ NULL, 0 }
be58e70d JK	127	};
be58e70d JK	128
	129	static struct userdiff_driver driver_false = {
	130	"!diff",
	131	NULL,
122aa6f9	132	1,
be58e70d JK	133	{ NULL, 0 }
be58e70d JK	134	};
be58e70d JK	135
	136	static struct userdiff_driver userdiff_find_by_namelen(const char k, int len)
	137	{
	138	int i;
	139	for (i = 0; i < ndrivers; i++) {
	140	struct userdiff_driver *drv = drivers + i;
	141	if (!strncmp(drv->name, k, len) && !drv->name[len])
	142	return drv;
	143	}
	144	for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
	145	struct userdiff_driver *drv = builtin_drivers + i;
	146	if (!strncmp(drv->name, k, len) && !drv->name[len])
	147	return drv;
	148	}
	149	return NULL;
	150	}
	151
	152	static struct userdiff_driver parse_driver(const char var,
	153	const char value, const char type)
	154	{
	155	struct userdiff_driver *drv;
	156	const char *dot;
	157	const char *name;
	158	int namelen;
	159
	160	if (prefixcmp(var, "diff."))
	161	return NULL;
	162	dot = strrchr(var, '.');
	163	if (dot == var + 4)
	164	return NULL;
	165	if (strcmp(type, dot+1))
	166	return NULL;
	167
	168	name = var + 5;
	169	namelen = dot - name;
	170	drv = userdiff_find_by_namelen(name, namelen);
	171	if (!drv) {
	172	ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
	173	drv = &drivers[ndrivers++];
	174	memset(drv, 0, sizeof(*drv));
	175	drv->name = xmemdupz(name, namelen);
122aa6f9	176	drv->binary = -1;
be58e70d JK	177	}
	178	return drv;
	179	}
	180
	181	static int parse_funcname(struct userdiff_funcname f, const char k,
	182	const char *v, int cflags)
	183	{
	184	if (git_config_string(&f->pattern, k, v) < 0)
	185	return -1;
	186	f->cflags = cflags;
	187	return 1;
	188	}
	189
	190	static int parse_string(const char *d, const char k, const char *v)
	191	{
	192	if (git_config_string(d, k, v) < 0)
	193	return -1;
	194	return 1;
	195	}
	196
122aa6f9 JK	197	static int parse_tristate(int b, const char k, const char *v)
	198	{
	199	if (v && !strcasecmp(v, "auto"))
	200	*b = -1;
	201	else
	202	*b = git_config_bool(k, v);
	203	return 1;
	204	}
	205
d9bae1a1 JK	206	static int parse_bool(int b, const char k, const char *v)
	207	{
	208	*b = git_config_bool(k, v);
	209	return 1;
	210	}
	211
c7534ef4	212	int userdiff_config(const char k, const char v)
be58e70d JK	213	{
	214	struct userdiff_driver *drv;
	215
	216	if ((drv = parse_driver(k, v, "funcname")))
	217	return parse_funcname(&drv->funcname, k, v, 0);
	218	if ((drv = parse_driver(k, v, "xfuncname")))
	219	return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
122aa6f9 JK	220	if ((drv = parse_driver(k, v, "binary")))
122aa6f9 JK	221	return parse_tristate(&drv->binary, k, v);
be58e70d JK	222	if ((drv = parse_driver(k, v, "command")))
be58e70d JK	223	return parse_string(&drv->external, k, v);
9cb92c39 JK	224	if ((drv = parse_driver(k, v, "textconv")))
9cb92c39 JK	225	return parse_string(&drv->textconv, k, v);
d9bae1a1 JK	226	if ((drv = parse_driver(k, v, "cachetextconv")))
d9bae1a1 JK	227	return parse_bool(&drv->textconv_want_cache, k, v);
80c49c3d TR	228	if ((drv = parse_driver(k, v, "wordregex")))
80c49c3d TR	229	return parse_string(&drv->word_regex, k, v);
be58e70d JK	230
	231	return 0;
	232	}
	233
	234	struct userdiff_driver userdiff_find_by_name(const char name) {
	235	int len = strlen(name);
	236	return userdiff_find_by_namelen(name, len);
	237	}
	238
	239	struct userdiff_driver userdiff_find_by_path(const char path)
	240	{
	241	static struct git_attr *attr;
	242	struct git_attr_check check;
	243
	244	if (!attr)
7fb0eaa2	245	attr = git_attr("diff");
be58e70d JK	246	check.attr = attr;
	247
	248	if (!path)
	249	return NULL;
	250	if (git_checkattr(path, 1, &check))
	251	return NULL;
	252
	253	if (ATTR_TRUE(check.value))
	254	return &driver_true;
	255	if (ATTR_FALSE(check.value))
	256	return &driver_false;
	257	if (ATTR_UNSET(check.value))
	258	return NULL;
	259	return userdiff_find_by_name(check.value);
	260	}