[thirdparty/git.git] / t / helper / test-path-utils.c

#include "test-tool.h"
#include "cache.h"
#include "abspath.h"
#include "environment.h"
#include "setup.h"
#include "string-list.h"
#include "utf8.h"

/*
 * A "string_list_each_func_t" function that normalizes an entry from
 * GIT_CEILING_DIRECTORIES.  If the path is unusable for some reason,
 * die with an explanation.
 */
static int normalize_ceiling_entry(struct string_list_item *item,
				   void *data UNUSED)
{
	char *ceil = item->string;

	if (!*ceil)
		die("Empty path is not supported");
	if (!is_absolute_path(ceil))
		die("Path \"%s\" is not absolute", ceil);
	if (normalize_path_copy(ceil, ceil) < 0)
		die("Path \"%s\" could not be normalized", ceil);
	return 1;
}

static void normalize_argv_string(const char **var, const char *input)
{
	if (!strcmp(input, "<null>"))
		*var = NULL;
	else if (!strcmp(input, "<empty>"))
		*var = "";
	else
		*var = input;

	if (*var && (**var == '<' || **var == '('))
		die("Bad value: %s\n", input);
}

struct test_data {
	const char *from;  /* input:  transform from this ... */
	const char *to;    /* output: ... to this.            */
	const char *alternative; /* output: ... or this.      */
};

/*
 * Compatibility wrappers for OpenBSD, whose basename(3) and dirname(3)
 * have const parameters.
 */
static char *posix_basename(char *path)
{
	return basename(path);
}

static char *posix_dirname(char *path)
{
	return dirname(path);
}

static int test_function(struct test_data *data, char *(*func)(char *input),
	const char *funcname)
{
	int failed = 0, i;
	char buffer[1024];
	char *to;

	for (i = 0; data[i].to; i++) {
		if (!data[i].from)
			to = func(NULL);
		else {
			xsnprintf(buffer, sizeof(buffer), "%s", data[i].from);
			to = func(buffer);
		}
		if (!strcmp(to, data[i].to))
			continue;
		if (!data[i].alternative)
			error("FAIL: %s(%s) => '%s' != '%s'\n",
				funcname, data[i].from, to, data[i].to);
		else if (!strcmp(to, data[i].alternative))
			continue;
		else
			error("FAIL: %s(%s) => '%s' != '%s', '%s'\n",
				funcname, data[i].from, to, data[i].to,
				data[i].alternative);
		failed = 1;
	}
	return failed;
}

static struct test_data basename_data[] = {
	/* --- POSIX type paths --- */
	{ NULL,              "."    },
	{ "",                "."    },
	{ ".",               "."    },
	{ "..",              ".."   },
	{ "/",               "/"    },
	{ "//",              "/", "//" },
	{ "///",             "/", "//" },
	{ "////",            "/", "//" },
	{ "usr",             "usr"  },
	{ "/usr",            "usr"  },
	{ "/usr/",           "usr"  },
	{ "/usr//",          "usr"  },
	{ "/usr/lib",        "lib"  },
	{ "usr/lib",         "lib"  },
	{ "usr/lib///",      "lib"  },

#if defined(__MINGW32__) || defined(_MSC_VER)
	/* --- win32 type paths --- */
	{ "\\usr",           "usr"  },
	{ "\\usr\\",         "usr"  },
	{ "\\usr\\\\",       "usr"  },
	{ "\\usr\\lib",      "lib"  },
	{ "usr\\lib",        "lib"  },
	{ "usr\\lib\\\\\\",  "lib"  },
	{ "C:/usr",          "usr"  },
	{ "C:/usr",          "usr"  },
	{ "C:/usr/",         "usr"  },
	{ "C:/usr//",        "usr"  },
	{ "C:/usr/lib",      "lib"  },
	{ "C:usr/lib",       "lib"  },
	{ "C:usr/lib///",    "lib"  },
	{ "C:",              "."    },
	{ "C:a",             "a"    },
	{ "C:/",             "/"    },
	{ "C:///",           "/"    },
	{ "\\",              "\\", "/" },
	{ "\\\\",            "\\", "/" },
	{ "\\\\\\",          "\\", "/" },
#endif
	{ NULL,              NULL   }
};

static struct test_data dirname_data[] = {
	/* --- POSIX type paths --- */
	{ NULL,              "."      },
	{ "",                "."      },
	{ ".",               "."      },
	{ "..",              "."      },
	{ "/",               "/"      },
	{ "//",              "/", "//" },
	{ "///",             "/", "//" },
	{ "////",            "/", "//" },
	{ "usr",             "."      },
	{ "/usr",            "/"      },
	{ "/usr/",           "/"      },
	{ "/usr//",          "/"      },
	{ "/usr/lib",        "/usr"   },
	{ "usr/lib",         "usr"    },
	{ "usr/lib///",      "usr"    },

#if defined(__MINGW32__) || defined(_MSC_VER)
	/* --- win32 type paths --- */
	{ "\\",              "\\"     },
	{ "\\\\",            "\\\\"   },
	{ "\\usr",           "\\"     },
	{ "\\usr\\",         "\\"     },
	{ "\\usr\\\\",       "\\"     },
	{ "\\usr\\lib",      "\\usr"  },
	{ "usr\\lib",        "usr"    },
	{ "usr\\lib\\\\\\",  "usr"    },
	{ "C:a",             "C:."    },
	{ "C:/",             "C:/"    },
	{ "C:///",           "C:/"    },
	{ "C:/usr",          "C:/"    },
	{ "C:/usr/",         "C:/"    },
	{ "C:/usr//",        "C:/"    },
	{ "C:/usr/lib",      "C:/usr" },
	{ "C:usr/lib",       "C:usr"  },
	{ "C:usr/lib///",    "C:usr"  },
	{ "\\\\\\",          "\\"     },
	{ "\\\\\\\\",        "\\"     },
	{ "C:",              "C:.", "." },
#endif
	{ NULL,              NULL     }
};

static int check_dotfile(const char *x, const char **argv,
			 int (*is_hfs)(const char *),
			 int (*is_ntfs)(const char *))
{
	int res = 0, expect = 1;
	for (; *argv; argv++) {
		if (!strcmp("--not", *argv))
			expect = !expect;
		else if (expect != (is_hfs(*argv) || is_ntfs(*argv)))
			res = error("'%s' is %s.git%s", *argv,
				    expect ? "not " : "", x);
		else
			fprintf(stderr, "ok: '%s' is %s.git%s\n",
				*argv, expect ? "" : "not ", x);
	}
	return !!res;
}

static int cmp_by_st_size(const void *a, const void *b)
{
	intptr_t x = (intptr_t)((struct string_list_item *)a)->util;
	intptr_t y = (intptr_t)((struct string_list_item *)b)->util;

	return x > y ? -1 : (x < y ? +1 : 0);
}

/*
 * A very simple, reproducible pseudo-random generator. Copied from
 * `test-genrandom.c`.
 */
static uint64_t my_random_value = 1234;

static uint64_t my_random(void)
{
	my_random_value = my_random_value * 1103515245 + 12345;
	return my_random_value;
}

/*
 * A fast approximation of the square root, without requiring math.h.
 *
 * It uses Newton's method to approximate the solution of 0 = x^2 - value.
 */
static double my_sqrt(double value)
{
	const double epsilon = 1e-6;
	double x = value;

	if (value == 0)
		return 0;

	for (;;) {
		double delta = (value / x - x) / 2;
		if (delta < epsilon && delta > -epsilon)
			return x + delta;
		x += delta;
	}
}

static int protect_ntfs_hfs_benchmark(int argc, const char **argv)
{
	size_t i, j, nr, min_len = 3, max_len = 20;
	char **names;
	int repetitions = 15, file_mode = 0100644;
	uint64_t begin, end;
	double m[3][2], v[3][2];
	uint64_t cumul;
	double cumul2;

	if (argc > 1 && !strcmp(argv[1], "--with-symlink-mode")) {
		file_mode = 0120000;
		argc--;
		argv++;
	}

	nr = argc > 1 ? strtoul(argv[1], NULL, 0) : 1000000;
	ALLOC_ARRAY(names, nr);

	if (argc > 2) {
		min_len = strtoul(argv[2], NULL, 0);
		if (argc > 3)
			max_len = strtoul(argv[3], NULL, 0);
		if (min_len > max_len)
			die("min_len > max_len");
	}

	for (i = 0; i < nr; i++) {
		size_t len = min_len + (my_random() % (max_len + 1 - min_len));

		names[i] = xmallocz(len);
		while (len > 0)
			names[i][--len] = (char)(' ' + (my_random() % ('\x7f' - ' ')));
	}

	for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
		for (protect_hfs = 0; protect_hfs < 2; protect_hfs++) {
			cumul = 0;
			cumul2 = 0;
			for (i = 0; i < repetitions; i++) {
				begin = getnanotime();
				for (j = 0; j < nr; j++)
					verify_path(names[j], file_mode);
				end = getnanotime();
				printf("protect_ntfs = %d, protect_hfs = %d: %lfms\n", protect_ntfs, protect_hfs, (end-begin) / (double)1e6);
				cumul += end - begin;
				cumul2 += (end - begin) * (end - begin);
			}
			m[protect_ntfs][protect_hfs] = cumul / (double)repetitions;
			v[protect_ntfs][protect_hfs] = my_sqrt(cumul2 / (double)repetitions - m[protect_ntfs][protect_hfs] * m[protect_ntfs][protect_hfs]);
			printf("mean: %lfms, stddev: %lfms\n", m[protect_ntfs][protect_hfs] / (double)1e6, v[protect_ntfs][protect_hfs] / (double)1e6);
		}

	for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
		for (protect_hfs = 0; protect_hfs < 2; protect_hfs++)
			printf("ntfs=%d/hfs=%d: %lf%% slower\n", protect_ntfs, protect_hfs, (m[protect_ntfs][protect_hfs] - m[0][0]) * 100 / m[0][0]);

	return 0;
}

int cmd__path_utils(int argc, const char **argv)
{
	if (argc == 3 && !strcmp(argv[1], "normalize_path_copy")) {
		char *buf = xmallocz(strlen(argv[2]));
		int rv = normalize_path_copy(buf, argv[2]);
		puts(rv ? "++failed++" : buf);
		free(buf);
		return 0;
	}

	if (argc >= 2 && !strcmp(argv[1], "real_path")) {
		struct strbuf realpath = STRBUF_INIT;
		while (argc > 2) {
			strbuf_realpath(&realpath, argv[2], 1);
			puts(realpath.buf);
			argc--;
			argv++;
		}
		strbuf_release(&realpath);
		return 0;
	}

	if (argc >= 2 && !strcmp(argv[1], "absolute_path")) {
		while (argc > 2) {
			puts(absolute_path(argv[2]));
			argc--;
			argv++;
		}
		return 0;
	}

	if (argc == 4 && !strcmp(argv[1], "longest_ancestor_length")) {
		int len;
		struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
		char *path = xstrdup(argv[2]);

		/*
		 * We have to normalize the arguments because under
		 * Windows, bash mangles arguments that look like
		 * absolute POSIX paths or colon-separate lists of
		 * absolute POSIX paths into DOS paths (e.g.,
		 * "/foo:/foo/bar" might be converted to
		 * "D:\Src\msysgit\foo;D:\Src\msysgit\foo\bar"),
		 * whereas longest_ancestor_length() requires paths
		 * that use forward slashes.
		 */
		if (normalize_path_copy(path, path))
			die("Path \"%s\" could not be normalized", argv[2]);
		string_list_split(&ceiling_dirs, argv[3], PATH_SEP, -1);
		filter_string_list(&ceiling_dirs, 0,
				   normalize_ceiling_entry, NULL);
		len = longest_ancestor_length(path, &ceiling_dirs);
		string_list_clear(&ceiling_dirs, 0);
		free(path);
		printf("%d\n", len);
		return 0;
	}

	if (argc >= 4 && !strcmp(argv[1], "prefix_path")) {
		const char *prefix = argv[2];
		int prefix_len = strlen(prefix);
		int nongit_ok;
		setup_git_directory_gently(&nongit_ok);
		while (argc > 3) {
			char *pfx = prefix_path(prefix, prefix_len, argv[3]);

			puts(pfx);
			free(pfx);
			argc--;
			argv++;
		}
		return 0;
	}

	if (argc == 4 && !strcmp(argv[1], "strip_path_suffix")) {
		char *prefix = strip_path_suffix(argv[2], argv[3]);
		printf("%s\n", prefix ? prefix : "(null)");
		free(prefix);
		return 0;
	}

	if (argc == 3 && !strcmp(argv[1], "print_path")) {
		puts(argv[2]);
		return 0;
	}

	if (argc == 4 && !strcmp(argv[1], "relative_path")) {
		struct strbuf sb = STRBUF_INIT;
		const char *in, *prefix, *rel;
		normalize_argv_string(&in, argv[2]);
		normalize_argv_string(&prefix, argv[3]);
		rel = relative_path(in, prefix, &sb);
		if (!rel)
			puts("(null)");
		else
			puts(strlen(rel) > 0 ? rel : "(empty)");
		strbuf_release(&sb);
		return 0;
	}

	if (argc == 2 && !strcmp(argv[1], "basename"))
		return test_function(basename_data, posix_basename, argv[1]);

	if (argc == 2 && !strcmp(argv[1], "dirname"))
		return test_function(dirname_data, posix_dirname, argv[1]);

	if (argc > 2 && !strcmp(argv[1], "is_dotgitmodules")) {
		return check_dotfile("modules", argv + 2,
				     is_hfs_dotgitmodules,
				     is_ntfs_dotgitmodules);
	}
	if (argc > 2 && !strcmp(argv[1], "is_dotgitignore")) {
		return check_dotfile("ignore", argv + 2,
				     is_hfs_dotgitignore,
				     is_ntfs_dotgitignore);
	}
	if (argc > 2 && !strcmp(argv[1], "is_dotgitattributes")) {
		return check_dotfile("attributes", argv + 2,
				     is_hfs_dotgitattributes,
				     is_ntfs_dotgitattributes);
	}
	if (argc > 2 && !strcmp(argv[1], "is_dotmailmap")) {
		return check_dotfile("mailmap", argv + 2,
				     is_hfs_dotmailmap,
				     is_ntfs_dotmailmap);
	}

	if (argc > 2 && !strcmp(argv[1], "file-size")) {
		int res = 0, i;
		struct stat st;

		for (i = 2; i < argc; i++)
			if (stat(argv[i], &st))
				res = error_errno("Cannot stat '%s'", argv[i]);
			else
				printf("%"PRIuMAX"\n", (uintmax_t)st.st_size);
		return !!res;
	}

	if (argc == 4 && !strcmp(argv[1], "skip-n-bytes")) {
		int fd = open(argv[2], O_RDONLY), offset = atoi(argv[3]);
		char buffer[65536];

		if (fd < 0)
			die_errno("could not open '%s'", argv[2]);
		if (lseek(fd, offset, SEEK_SET) < 0)
			die_errno("could not skip %d bytes", offset);
		for (;;) {
			ssize_t count = read(fd, buffer, sizeof(buffer));
			if (count < 0)
				die_errno("could not read '%s'", argv[2]);
			if (!count)
				break;
			if (write(1, buffer, count) < 0)
				die_errno("could not write to stdout");
		}
		close(fd);
		return 0;
	}

	if (argc > 5 && !strcmp(argv[1], "slice-tests")) {
		int res = 0;
		long offset, stride, i;
		struct string_list list = STRING_LIST_INIT_NODUP;
		struct stat st;

		offset = strtol(argv[2], NULL, 10);
		stride = strtol(argv[3], NULL, 10);
		if (stride < 1)
			stride = 1;
		for (i = 4; i < argc; i++)
			if (stat(argv[i], &st))
				res = error_errno("Cannot stat '%s'", argv[i]);
			else
				string_list_append(&list, argv[i])->util =
					(void *)(intptr_t)st.st_size;
		QSORT(list.items, list.nr, cmp_by_st_size);
		for (i = offset; i < list.nr; i+= stride)
			printf("%s\n", list.items[i].string);

		return !!res;
	}

	if (argc > 1 && !strcmp(argv[1], "protect_ntfs_hfs"))
		return !!protect_ntfs_hfs_benchmark(argc - 1, argv + 1);

	if (argc > 1 && !strcmp(argv[1], "is_valid_path")) {
		int res = 0, expect = 1, i;

		for (i = 2; i < argc; i++)
			if (!strcmp("--not", argv[i]))
				expect = 0;
			else if (expect != is_valid_path(argv[i]))
				res = error("'%s' is%s a valid path",
					    argv[i], expect ? " not" : "");
			else
				fprintf(stderr,
					"'%s' is%s a valid path\n",
					argv[i], expect ? "" : " not");

		return !!res;
	}

	fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
		argv[1] ? argv[1] : "(there was none)");
	return 1;
}
Commit	Line	Data
b8d5cf4f	1	#include "test-tool.h"
ae299be0	2	#include "cache.h"
0b027f6c	3	#include "abspath.h"
32a8f510	4	#include "environment.h"
e38da487	5	#include "setup.h"
31171d9e	6	#include "string-list.h"
dc2d9ba3	7	#include "utf8.h"
ae299be0	8
9e2326c7 MH	9	/*
	10	* A "string_list_each_func_t" function that normalizes an entry from
	11	* GIT_CEILING_DIRECTORIES. If the path is unusable for some reason,
	12	* die with an explanation.
	13	*/
1ee34710 JK	14	static int normalize_ceiling_entry(struct string_list_item *item,
1ee34710 JK	15	void *data UNUSED)
9e2326c7	16	{
62f17513	17	char *ceil = item->string;
9e2326c7	18
62f17513	19	if (!*ceil)
9e2326c7	20	die("Empty path is not supported");
9e2326c7 MH	21	if (!is_absolute_path(ceil))
9e2326c7 MH	22	die("Path \"%s\" is not absolute", ceil);
62f17513	23	if (normalize_path_copy(ceil, ceil) < 0)
9e2326c7	24	die("Path \"%s\" could not be normalized", ceil);
9e2326c7 MH	25	return 1;
	26	}
	27
203439b2 JX	28	static void normalize_argv_string(const char *var, const char input)
	29	{
	30	if (!strcmp(input, "<null>"))
	31	*var = NULL;
	32	else if (!strcmp(input, "<empty>"))
	33	*var = "";
	34	else
	35	*var = input;
	36
	37	if (var && (var == '<' \|\| *var == '('))
	38	die("Bad value: %s\n", input);
	39	}
	40
7d1aaa68 JS	41	struct test_data {
	42	const char from; / input: transform from this ... */
	43	const char to; / output: ... to this. */
371471ce	44	const char alternative; / output: ... or this. */
7d1aaa68 JS	45	};
7d1aaa68 JS	46
29c2eda8 RS	47	/*
	48	* Compatibility wrappers for OpenBSD, whose basename(3) and dirname(3)
	49	* have const parameters.
	50	*/
	51	static char posix_basename(char path)
	52	{
	53	return basename(path);
	54	}
	55
	56	static char posix_dirname(char path)
	57	{
	58	return dirname(path);
	59	}
	60
7d1aaa68 JS	61	static int test_function(struct test_data data, char (func)(char input),
	62	const char *funcname)
	63	{
	64	int failed = 0, i;
	65	char buffer[1024];
	66	char *to;
	67
	68	for (i = 0; data[i].to; i++) {
	69	if (!data[i].from)
	70	to = func(NULL);
	71	else {
7b11a18a	72	xsnprintf(buffer, sizeof(buffer), "%s", data[i].from);
7d1aaa68 JS	73	to = func(buffer);
7d1aaa68 JS	74	}
371471ce JS	75	if (!strcmp(to, data[i].to))
	76	continue;
	77	if (!data[i].alternative)
7d1aaa68 JS	78	error("FAIL: %s(%s) => '%s' != '%s'\n",
7d1aaa68 JS	79	funcname, data[i].from, to, data[i].to);
371471ce JS	80	else if (!strcmp(to, data[i].alternative))
	81	continue;
	82	else
	83	error("FAIL: %s(%s) => '%s' != '%s', '%s'\n",
	84	funcname, data[i].from, to, data[i].to,
	85	data[i].alternative);
	86	failed = 1;
7d1aaa68 JS	87	}
	88	return failed;
	89	}
	90
	91	static struct test_data basename_data[] = {
	92	/* --- POSIX type paths --- */
	93	{ NULL, "." },
	94	{ "", "." },
	95	{ ".", "." },
	96	{ "..", ".." },
	97	{ "/", "/" },
371471ce JS	98	{ "//", "/", "//" },
	99	{ "///", "/", "//" },
	100	{ "////", "/", "//" },
7d1aaa68 JS	101	{ "usr", "usr" },
	102	{ "/usr", "usr" },
	103	{ "/usr/", "usr" },
	104	{ "/usr//", "usr" },
	105	{ "/usr/lib", "lib" },
	106	{ "usr/lib", "lib" },
	107	{ "usr/lib///", "lib" },
	108
	109	#if defined(__MINGW32__) \|\| defined(_MSC_VER)
7d1aaa68 JS	110	/* --- win32 type paths --- */
	111	{ "\\usr", "usr" },
	112	{ "\\usr\\", "usr" },
	113	{ "\\usr\\\\", "usr" },
	114	{ "\\usr\\lib", "lib" },
	115	{ "usr\\lib", "lib" },
	116	{ "usr\\lib\\\\\\", "lib" },
	117	{ "C:/usr", "usr" },
	118	{ "C:/usr", "usr" },
	119	{ "C:/usr/", "usr" },
	120	{ "C:/usr//", "usr" },
	121	{ "C:/usr/lib", "lib" },
	122	{ "C:usr/lib", "lib" },
	123	{ "C:usr/lib///", "lib" },
	124	{ "C:", "." },
	125	{ "C:a", "a" },
	126	{ "C:/", "/" },
	127	{ "C:///", "/" },
371471ce JS	128	{ "\\", "\\", "/" },
	129	{ "\\\\", "\\", "/" },
	130	{ "\\\\\\", "\\", "/" },
7d1aaa68 JS	131	#endif
	132	{ NULL, NULL }
	133	};
	134
	135	static struct test_data dirname_data[] = {
	136	/* --- POSIX type paths --- */
	137	{ NULL, "." },
	138	{ "", "." },
	139	{ ".", "." },
	140	{ "..", "." },
	141	{ "/", "/" },
371471ce JS	142	{ "//", "/", "//" },
	143	{ "///", "/", "//" },
	144	{ "////", "/", "//" },
7d1aaa68 JS	145	{ "usr", "." },
	146	{ "/usr", "/" },
	147	{ "/usr/", "/" },
	148	{ "/usr//", "/" },
	149	{ "/usr/lib", "/usr" },
	150	{ "usr/lib", "usr" },
	151	{ "usr/lib///", "usr" },
	152
	153	#if defined(__MINGW32__) \|\| defined(_MSC_VER)
7d1aaa68 JS	154	/* --- win32 type paths --- */
	155	{ "\\", "\\" },
	156	{ "\\\\", "\\\\" },
	157	{ "\\usr", "\\" },
	158	{ "\\usr\\", "\\" },
	159	{ "\\usr\\\\", "\\" },
	160	{ "\\usr\\lib", "\\usr" },
	161	{ "usr\\lib", "usr" },
	162	{ "usr\\lib\\\\\\", "usr" },
	163	{ "C:a", "C:." },
	164	{ "C:/", "C:/" },
	165	{ "C:///", "C:/" },
	166	{ "C:/usr", "C:/" },
	167	{ "C:/usr/", "C:/" },
	168	{ "C:/usr//", "C:/" },
	169	{ "C:/usr/lib", "C:/usr" },
	170	{ "C:usr/lib", "C:usr" },
	171	{ "C:usr/lib///", "C:usr" },
	172	{ "\\\\\\", "\\" },
	173	{ "\\\\\\\\", "\\" },
371471ce	174	{ "C:", "C:.", "." },
7d1aaa68 JS	175	#endif
	176	{ NULL, NULL }
	177	};
	178
801ed010 JK	179	static int check_dotfile(const char x, const char *argv,
	180	int (is_hfs)(const char ),
	181	int (is_ntfs)(const char ))
dc2d9ba3	182	{
801ed010 JK	183	int res = 0, expect = 1;
	184	for (; *argv; argv++) {
	185	if (!strcmp("--not", *argv))
	186	expect = !expect;
	187	else if (expect != (is_hfs(argv) \|\| is_ntfs(argv)))
	188	res = error("'%s' is %s.git%s", *argv,
	189	expect ? "not " : "", x);
	190	else
	191	fprintf(stderr, "ok: '%s' is %s.git%s\n",
	192	*argv, expect ? "" : "not ", x);
	193	}
	194	return !!res;
dc2d9ba3 JS	195	}
dc2d9ba3 JS	196
b819f1d2 JS	197	static int cmp_by_st_size(const void a, const void b)
	198	{
	199	intptr_t x = (intptr_t)((struct string_list_item *)a)->util;
	200	intptr_t y = (intptr_t)((struct string_list_item *)b)->util;
	201
	202	return x > y ? -1 : (x < y ? +1 : 0);
	203	}
	204
a62f9d1a GS	205	/*
	206	* A very simple, reproducible pseudo-random generator. Copied from
	207	* `test-genrandom.c`.
	208	*/
	209	static uint64_t my_random_value = 1234;
	210
	211	static uint64_t my_random(void)
	212	{
	213	my_random_value = my_random_value * 1103515245 + 12345;
	214	return my_random_value;
	215	}
	216
	217	/*
	218	* A fast approximation of the square root, without requiring math.h.
	219	*
	220	* It uses Newton's method to approximate the solution of 0 = x^2 - value.
	221	*/
	222	static double my_sqrt(double value)
	223	{
	224	const double epsilon = 1e-6;
	225	double x = value;
	226
	227	if (value == 0)
	228	return 0;
	229
	230	for (;;) {
	231	double delta = (value / x - x) / 2;
	232	if (delta < epsilon && delta > -epsilon)
	233	return x + delta;
	234	x += delta;
	235	}
	236	}
	237
	238	static int protect_ntfs_hfs_benchmark(int argc, const char **argv)
	239	{
	240	size_t i, j, nr, min_len = 3, max_len = 20;
	241	char **names;
	242	int repetitions = 15, file_mode = 0100644;
	243	uint64_t begin, end;
	244	double m[3][2], v[3][2];
	245	uint64_t cumul;
	246	double cumul2;
	247
	248	if (argc > 1 && !strcmp(argv[1], "--with-symlink-mode")) {
	249	file_mode = 0120000;
	250	argc--;
	251	argv++;
	252	}
	253
	254	nr = argc > 1 ? strtoul(argv[1], NULL, 0) : 1000000;
	255	ALLOC_ARRAY(names, nr);
	256
	257	if (argc > 2) {
	258	min_len = strtoul(argv[2], NULL, 0);
	259	if (argc > 3)
	260	max_len = strtoul(argv[3], NULL, 0);
	261	if (min_len > max_len)
	262	die("min_len > max_len");
	263	}
	264
	265	for (i = 0; i < nr; i++) {
	266	size_t len = min_len + (my_random() % (max_len + 1 - min_len));
	267
	268	names[i] = xmallocz(len);
269	while (len > 0)
270	names[i][--len] = (char)(' ' + (my_random() % ('\x7f' - ' ')));
271	}
272
273	for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
274	for (protect_hfs = 0; protect_hfs < 2; protect_hfs++) {
275	cumul = 0;
276	cumul2 = 0;
277	for (i = 0; i < repetitions; i++) {
278	begin = getnanotime();
279	for (j = 0; j < nr; j++)
280	verify_path(names[j], file_mode);
281	end = getnanotime();
282	printf("protect_ntfs = %d, protect_hfs = %d: %lfms\n", protect_ntfs, protect_hfs, (end-begin) / (double)1e6);
283	cumul += end - begin;
284	cumul2 += (end - begin) * (end - begin);
285	}
286	m[protect_ntfs][protect_hfs] = cumul / (double)repetitions;
287	v[protect_ntfs][protect_hfs] = my_sqrt(cumul2 / (double)repetitions - m[protect_ntfs][protect_hfs] * m[protect_ntfs][protect_hfs]);
288	printf("mean: %lfms, stddev: %lfms\n", m[protect_ntfs][protect_hfs] / (double)1e6, v[protect_ntfs][protect_hfs] / (double)1e6);
289	}
290
291	for (protect_ntfs = 0; protect_ntfs < 2; protect_ntfs++)
292	for (protect_hfs = 0; protect_hfs < 2; protect_hfs++)
293	printf("ntfs=%d/hfs=%d: %lf%% slower\n", protect_ntfs, protect_hfs, (m[protect_ntfs][protect_hfs] - m[0][0]) * 100 / m[0][0]);
294
295	return 0;
296	}
297
b8d5cf4f	298	int cmd__path_utils(int argc, const char **argv)
ae299be0	299	{
f42302b4	300	if (argc == 3 && !strcmp(argv[1], "normalize_path_copy")) {
62f17513	301	char *buf = xmallocz(strlen(argv[2]));
f42302b4	302	int rv = normalize_path_copy(buf, argv[2]);
e287a5b0 ÆAB	303	puts(rv ? "++failed++" : buf);
e287a5b0 ÆAB	304	free(buf);
2cd85c40	305	return 0;
ae299be0 DR	306	}
ae299be0 DR	307
e2a57aac	308	if (argc >= 2 && !strcmp(argv[1], "real_path")) {
3d7747e3	309	struct strbuf realpath = STRBUF_INIT;
d553e737	310	while (argc > 2) {
3d7747e3 AM	311	strbuf_realpath(&realpath, argv[2], 1);
3d7747e3 AM	312	puts(realpath.buf);
d553e737 DR	313	argc--;
	314	argv++;
	315	}
3d7747e3	316	strbuf_release(&realpath);
2cd85c40	317	return 0;
d553e737 DR	318	}
d553e737 DR	319
87a246e1 MH	320	if (argc >= 2 && !strcmp(argv[1], "absolute_path")) {
	321	while (argc > 2) {
	322	puts(absolute_path(argv[2]));
	323	argc--;
	324	argv++;
	325	}
	326	return 0;
	327	}
	328
0454dd93	329	if (argc == 4 && !strcmp(argv[1], "longest_ancestor_length")) {
31171d9e MH	330	int len;
31171d9e MH	331	struct string_list ceiling_dirs = STRING_LIST_INIT_DUP;
9e2326c7	332	char *path = xstrdup(argv[2]);
31171d9e	333
9e2326c7 MH	334	/*
	335	* We have to normalize the arguments because under
	336	* Windows, bash mangles arguments that look like
	337	* absolute POSIX paths or colon-separate lists of
	338	* absolute POSIX paths into DOS paths (e.g.,
	339	* "/foo:/foo/bar" might be converted to
	340	* "D:\Src\msysgit\foo;D:\Src\msysgit\foo\bar"),
	341	* whereas longest_ancestor_length() requires paths
	342	* that use forward slashes.
	343	*/
	344	if (normalize_path_copy(path, path))
	345	die("Path \"%s\" could not be normalized", argv[2]);
31171d9e	346	string_list_split(&ceiling_dirs, argv[3], PATH_SEP, -1);
9e2326c7 MH	347	filter_string_list(&ceiling_dirs, 0,
	348	normalize_ceiling_entry, NULL);
	349	len = longest_ancestor_length(path, &ceiling_dirs);
31171d9e	350	string_list_clear(&ceiling_dirs, 0);
9e2326c7	351	free(path);
0454dd93	352	printf("%d\n", len);
2cd85c40	353	return 0;
0454dd93 DR	354	}
0454dd93 DR	355
9e813723	356	if (argc >= 4 && !strcmp(argv[1], "prefix_path")) {
3f2e2297	357	const char *prefix = argv[2];
9e813723 MH	358	int prefix_len = strlen(prefix);
	359	int nongit_ok;
	360	setup_git_directory_gently(&nongit_ok);
	361	while (argc > 3) {
e287a5b0 ÆAB	362	char *pfx = prefix_path(prefix, prefix_len, argv[3]);
	363
	364	puts(pfx);
	365	free(pfx);
9e813723 MH	366	argc--;
	367	argv++;
	368	}
	369	return 0;
	370	}
	371
4fcc86b0 JS	372	if (argc == 4 && !strcmp(argv[1], "strip_path_suffix")) {
	373	char *prefix = strip_path_suffix(argv[2], argv[3]);
	374	printf("%s\n", prefix ? prefix : "(null)");
e287a5b0	375	free(prefix);
4fcc86b0 JS	376	return 0;
	377	}
	378
7ffd18fc	379	if (argc == 3 && !strcmp(argv[1], "print_path")) {
abd4284b JX	380	puts(argv[2]);
	381	return 0;
	382	}
	383
203439b2	384	if (argc == 4 && !strcmp(argv[1], "relative_path")) {
e02ca72f	385	struct strbuf sb = STRBUF_INIT;
203439b2 JX	386	const char in, prefix, *rel;
	387	normalize_argv_string(&in, argv[2]);
	388	normalize_argv_string(&prefix, argv[3]);
e02ca72f	389	rel = relative_path(in, prefix, &sb);
203439b2 JX	390	if (!rel)
	391	puts("(null)");
	392	else
	393	puts(strlen(rel) > 0 ? rel : "(empty)");
e02ca72f	394	strbuf_release(&sb);
203439b2 JX	395	return 0;
	396	}
	397
7d1aaa68	398	if (argc == 2 && !strcmp(argv[1], "basename"))
29c2eda8	399	return test_function(basename_data, posix_basename, argv[1]);
7d1aaa68 JS	400
7d1aaa68 JS	401	if (argc == 2 && !strcmp(argv[1], "dirname"))
29c2eda8	402	return test_function(dirname_data, posix_dirname, argv[1]);
7d1aaa68	403
dc2d9ba3	404	if (argc > 2 && !strcmp(argv[1], "is_dotgitmodules")) {
801ed010 JK	405	return check_dotfile("modules", argv + 2,
	406	is_hfs_dotgitmodules,
	407	is_ntfs_dotgitmodules);
	408	}
	409	if (argc > 2 && !strcmp(argv[1], "is_dotgitignore")) {
	410	return check_dotfile("ignore", argv + 2,
	411	is_hfs_dotgitignore,
	412	is_ntfs_dotgitignore);
	413	}
	414	if (argc > 2 && !strcmp(argv[1], "is_dotgitattributes")) {
	415	return check_dotfile("attributes", argv + 2,
	416	is_hfs_dotgitattributes,
	417	is_ntfs_dotgitattributes);
	418	}
	419	if (argc > 2 && !strcmp(argv[1], "is_dotmailmap")) {
	420	return check_dotfile("mailmap", argv + 2,
	421	is_hfs_dotmailmap,
	422	is_ntfs_dotmailmap);
dc2d9ba3 JS	423	}
dc2d9ba3 JS	424
5868bd86 JS	425	if (argc > 2 && !strcmp(argv[1], "file-size")) {
	426	int res = 0, i;
	427	struct stat st;
	428
	429	for (i = 2; i < argc; i++)
	430	if (stat(argv[i], &st))
	431	res = error_errno("Cannot stat '%s'", argv[i]);
	432	else
	433	printf("%"PRIuMAX"\n", (uintmax_t)st.st_size);
	434	return !!res;
	435	}
	436
af9912ef JS	437	if (argc == 4 && !strcmp(argv[1], "skip-n-bytes")) {
	438	int fd = open(argv[2], O_RDONLY), offset = atoi(argv[3]);
	439	char buffer[65536];
	440
	441	if (fd < 0)
	442	die_errno("could not open '%s'", argv[2]);
	443	if (lseek(fd, offset, SEEK_SET) < 0)
	444	die_errno("could not skip %d bytes", offset);
	445	for (;;) {
	446	ssize_t count = read(fd, buffer, sizeof(buffer));
	447	if (count < 0)
	448	die_errno("could not read '%s'", argv[2]);
	449	if (!count)
	450	break;
	451	if (write(1, buffer, count) < 0)
	452	die_errno("could not write to stdout");
	453	}
	454	close(fd);
	455	return 0;
	456	}
	457
b819f1d2 JS	458	if (argc > 5 && !strcmp(argv[1], "slice-tests")) {
	459	int res = 0;
	460	long offset, stride, i;
	461	struct string_list list = STRING_LIST_INIT_NODUP;
	462	struct stat st;
	463
	464	offset = strtol(argv[2], NULL, 10);
	465	stride = strtol(argv[3], NULL, 10);
	466	if (stride < 1)
	467	stride = 1;
	468	for (i = 4; i < argc; i++)
	469	if (stat(argv[i], &st))
	470	res = error_errno("Cannot stat '%s'", argv[i]);
	471	else
	472	string_list_append(&list, argv[i])->util =
	473	(void *)(intptr_t)st.st_size;
	474	QSORT(list.items, list.nr, cmp_by_st_size);
	475	for (i = offset; i < list.nr; i+= stride)
	476	printf("%s\n", list.items[i].string);
	477
	478	return !!res;
	479	}
	480
a62f9d1a GS	481	if (argc > 1 && !strcmp(argv[1], "protect_ntfs_hfs"))
	482	return !!protect_ntfs_hfs_benchmark(argc - 1, argv + 1);
	483
d2c84dad JS	484	if (argc > 1 && !strcmp(argv[1], "is_valid_path")) {
	485	int res = 0, expect = 1, i;
	486
	487	for (i = 2; i < argc; i++)
	488	if (!strcmp("--not", argv[i]))
	489	expect = 0;
	490	else if (expect != is_valid_path(argv[i]))
	491	res = error("'%s' is%s a valid path",
	492	argv[i], expect ? " not" : "");
	493	else
	494	fprintf(stderr,
	495	"'%s' is%s a valid path\n",
	496	argv[i], expect ? "" : " not");
	497
	498	return !!res;
	499	}
	500
2cd85c40 JS	501	fprintf(stderr, "%s: unknown function name: %s\n", argv[0],
	502	argv[1] ? argv[1] : "(there was none)");
	503	return 1;
ae299be0	504	}