--- /dev/null
+#include "../../git-compat-util.h"
+
++int win32_has_dos_drive_prefix(const char *path)
++{
++ int i;
++
++ /*
++ * Does it start with an ASCII letter (i.e. highest bit not set),
++ * followed by a colon?
++ */
++ if (!(0x80 & (unsigned char)*path))
++ return *path && path[1] == ':' ? 2 : 0;
++
++ /*
++ * While drive letters must be letters of the English alphabet, it is
++ * possible to assign virtually _any_ Unicode character via `subst` as
++ * a drive letter to "virtual drives". Even `1`, or `ä`. Or fun stuff
++ * like this:
++ *
++ * subst ֍: %USERPROFILE%\Desktop
++ */
++ for (i = 1; i < 4 && (0x80 & (unsigned char)path[i]); i++)
++ ; /* skip first UTF-8 character */
++ return path[i] == ':' ? i + 1 : 0;
++}
++
+int win32_skip_dos_drive_prefix(char **path)
+{
+ int ret = has_dos_drive_prefix(*path);
+ *path += ret;
+ return ret;
+}
+
+int win32_offset_1st_component(const char *path)
+{
+ char *pos = (char *)path;
+
+ /* unc paths */
+ if (!skip_dos_drive_prefix(&pos) &&
+ is_dir_sep(pos[0]) && is_dir_sep(pos[1])) {
+ /* skip server name */
+ pos = strpbrk(pos + 2, "\\/");
+ if (!pos)
+ return 0; /* Error: malformed unc path */
+
+ do {
+ pos++;
+ } while (*pos && !is_dir_sep(*pos));
+ }
+
+ return pos + is_dir_sep(*pos) - path;
+}
return is_hfs_dotgitmodules(path) || is_ntfs_dotgitmodules(path);
}
+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")) {
return !!res;
}
+ 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;
projects / thirdparty / git.git / commitdiff
