}
#endif /* not WINDOWS */
\f
-/* Resolve "." and ".." elements of PATH by destructively modifying
- PATH. "." is resolved by removing that path element, and ".." is
- resolved by removing the preceding path element. Leading and
- trailing slashes are preserved.
-
- Return non-zero if any changes have been made.
-
- For example, "a/b/c/./../d/.." will yield "a/b/". More exhaustive
- test examples are provided below. If you change anything in this
- function, run test_path_simplify to make sure you haven't broken a
- test case.
-
- A previous version of this function was based on path_simplify()
- from GNU Bash, but it has been rewritten for Wget 1.8.1. */
-
-int
-path_simplify (char *path)
-{
- int change = 0;
- char *p, *end;
-
- if (path[0] == '/')
- ++path; /* preserve the leading '/'. */
-
- p = path;
- end = p + strlen (p) + 1; /* position past the terminating zero. */
-
- while (1)
- {
- again:
- /* P should point to the beginning of a path element. */
-
- if (*p == '.' && (*(p + 1) == '/' || *(p + 1) == '\0'))
- {
- /* Handle "./foo" by moving "foo" two characters to the
- left. */
- if (*(p + 1) == '/')
- {
- change = 1;
- memmove (p, p + 2, end - p);
- end -= 2;
- goto again;
- }
- else
- {
- change = 1;
- *p = '\0';
- break;
- }
- }
- else if (*p == '.' && *(p + 1) == '.'
- && (*(p + 2) == '/' || *(p + 2) == '\0'))
- {
- /* Handle "../foo" by moving "foo" one path element to the
- left. */
- char *b = p; /* not p-1 because P can equal PATH */
-
- /* Backtrack by one path element, but not past the beginning
- of PATH. */
-
- /* foo/bar/../baz */
- /* ^ p */
- /* ^ b */
-
- if (b > path)
- {
- /* Move backwards until B hits the beginning of the
- previous path element or the beginning of path. */
- for (--b; b > path && *(b - 1) != '/'; b--)
- ;
- }
-
- change = 1;
- if (*(p + 2) == '/')
- {
- memmove (b, p + 3, end - (p + 3));
- end -= (p + 3) - b;
- p = b;
- }
- else
- {
- *b = '\0';
- break;
- }
-
- goto again;
- }
- else if (*p == '/')
- {
- /* Remove empty path elements. Not mandated by rfc1808 et
- al, but empty path elements are not all that useful, and
- the rest of Wget might not deal with them well. */
- char *q = p;
- while (*q == '/')
- ++q;
- change = 1;
- if (*q == '\0')
- {
- *p = '\0';
- break;
- }
- memmove (p, q, end - q);
- end -= q - p;
- goto again;
- }
-
- /* Skip to the next path element. */
- while (*p && *p != '/')
- ++p;
- if (*p == '\0')
- break;
-
- /* Make sure P points to the beginning of the next path element,
- which is location after the slash. */
- ++p;
- }
-
- return change;
-}
-\f
/* "Touch" FILE, i.e. make its atime and mtime equal to the time
specified with TM. */
void
return res;
}
#endif
-
-#if 0
-/* Debugging and testing support for path_simplify. */
-
-/* Debug: run path_simplify on PATH and return the result in a new
- string. Useful for calling from the debugger. */
-static char *
-ps (char *path)
-{
- char *copy = xstrdup (path);
- path_simplify (copy);
- return copy;
-}
-
-static void
-run_test (char *test, char *expected_result, int expected_change)
-{
- char *test_copy = xstrdup (test);
- int modified = path_simplify (test_copy);
-
- if (0 != strcmp (test_copy, expected_result))
- {
- printf ("Failed path_simplify(\"%s\"): expected \"%s\", got \"%s\".\n",
- test, expected_result, test_copy);
- }
- if (modified != expected_change)
- {
- if (expected_change == 1)
- printf ("Expected no modification with path_simplify(\"%s\").\n",
- test);
- else
- printf ("Expected modification with path_simplify(\"%s\").\n",
- test);
- }
- xfree (test_copy);
-}
-
-static void
-test_path_simplify (void)
-{
- static struct {
- char *test, *result;
- int should_modify;
- } tests[] = {
- { "", "", 0 },
- { ".", "", 1 },
- { "..", "", 1 },
- { "foo", "foo", 0 },
- { "foo/bar", "foo/bar", 0 },
- { "foo///bar", "foo/bar", 1 },
- { "foo/.", "foo/", 1 },
- { "foo/./", "foo/", 1 },
- { "foo./", "foo./", 0 },
- { "foo/../bar", "bar", 1 },
- { "foo/../bar/", "bar/", 1 },
- { "foo/bar/..", "foo/", 1 },
- { "foo/bar/../x", "foo/x", 1 },
- { "foo/bar/../x/", "foo/x/", 1 },
- { "foo/..", "", 1 },
- { "foo/../..", "", 1 },
- { "a/b/../../c", "c", 1 },
- { "./a/../b", "b", 1 }
- };
- int i;
-
- for (i = 0; i < ARRAY_SIZE (tests); i++)
- {
- char *test = tests[i].test;
- char *expected_result = tests[i].result;
- int expected_change = tests[i].should_modify;
- run_test (test, expected_result, expected_change);
- }
-
- /* Now run all the tests with a leading slash before the test case,
- to prove that the slash is being preserved. */
- for (i = 0; i < ARRAY_SIZE (tests); i++)
- {
- char *test, *expected_result;
- int expected_change = tests[i].should_modify;
-
- test = xmalloc (1 + strlen (tests[i].test) + 1);
- sprintf (test, "/%s", tests[i].test);
-
- expected_result = xmalloc (1 + strlen (tests[i].result) + 1);
- sprintf (expected_result, "/%s", tests[i].result);
-
- run_test (test, expected_result, expected_change);
-
- xfree (test);
- xfree (expected_result);
- }
-}
-#endif
projects / wget / blobdiff