mirror of
https://github.com/moparisthebest/wget
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[svn] Move path_simplify to url.c.
This commit is contained in:
hniksic
parent
0f120eee66
commit
a3500d32d7
@ -1,3 +1,7 @@
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2001-12-14 Hrvoje Niksic <hniksic@arsdigita.com>
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* url.c (path_simplify): Move here from utils.c, and make static.
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2001-12-13 Hrvoje Niksic <hniksic@arsdigita.com>
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2001-12-13 Hrvoje Niksic <hniksic@arsdigita.com>
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* init.c (wgetrc_file_name): Print correct message when loading
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* init.c (wgetrc_file_name): Print correct message when loading
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241
src/url.c
241
src/url.c
@ -48,8 +48,6 @@ extern int errno;
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/* Is X ".."? */
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/* Is X ".."? */
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#define DDOTP(x) ((*(x) == '.') && (*(x + 1) == '.') && (!*(x + 2)))
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#define DDOTP(x) ((*(x) == '.') && (*(x + 1) == '.') && (!*(x + 2)))
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static int urlpath_length PARAMS ((const char *));
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struct scheme_data
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struct scheme_data
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{
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{
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char *leading_string;
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char *leading_string;
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@ -70,7 +68,11 @@ static struct scheme_data supported_schemes[] =
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{ NULL, -1, 0 }
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{ NULL, -1, 0 }
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};
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};
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/* Forward declarations: */
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static char *construct_relative PARAMS ((const char *, const char *));
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static char *construct_relative PARAMS ((const char *, const char *));
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static int path_simplify PARAMS ((char *));
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/* Support for encoding and decoding of URL strings. We determine
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/* Support for encoding and decoding of URL strings. We determine
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@ -1373,18 +1375,20 @@ url_filename (const struct url *u)
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return name;
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return name;
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}
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}
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/* Like strlen(), but allow the URL to be ended with '?'. */
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/* Return the langth of URL's path. Path is considered to be
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terminated by one of '?', ';', '#', or by the end of the
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string. */
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static int
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static int
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urlpath_length (const char *url)
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path_length (const char *url)
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{
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{
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const char *q = strpbrk_or_eos (url, "?;#");
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const char *q = strpbrk_or_eos (url, "?;#");
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return q - url;
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return q - url;
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}
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}
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/* Find the last occurrence of character C in the range [b, e), or
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/* Find the last occurrence of character C in the range [b, e), or
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NULL, if none are present. This is almost completely equivalent to
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NULL, if none are present. This is equivalent to strrchr(b, c),
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{ *e = '\0'; return strrchr(b); }, except that it doesn't change
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except that it accepts an END argument instead of requiring the
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the contents of the string. */
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string to be zero-terminated. Why is there no memrchr()? */
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static const char *
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static const char *
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find_last_char (const char *b, const char *e, char c)
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find_last_char (const char *b, const char *e, char c)
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{
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{
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@ -1393,7 +1397,127 @@ find_last_char (const char *b, const char *e, char c)
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return e;
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return e;
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return NULL;
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return NULL;
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}
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}
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/* Resolve "." and ".." elements of PATH by destructively modifying
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PATH. "." is resolved by removing that path element, and ".." is
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resolved by removing the preceding path element. Leading and
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trailing slashes are preserved.
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Return non-zero if any changes have been made.
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For example, "a/b/c/./../d/.." will yield "a/b/". More exhaustive
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test examples are provided below. If you change anything in this
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function, run test_path_simplify to make sure you haven't broken a
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test case.
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A previous version of this function was based on path_simplify()
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from GNU Bash, but it has been rewritten for Wget 1.8.1. */
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static int
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path_simplify (char *path)
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{
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int change = 0;
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char *p, *end;
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if (path[0] == '/')
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++path; /* preserve the leading '/'. */
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p = path;
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end = p + strlen (p) + 1; /* position past the terminating zero. */
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while (1)
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{
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again:
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/* P should point to the beginning of a path element. */
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if (*p == '.' && (*(p + 1) == '/' || *(p + 1) == '\0'))
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{
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/* Handle "./foo" by moving "foo" two characters to the
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left. */
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if (*(p + 1) == '/')
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{
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change = 1;
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memmove (p, p + 2, end - p);
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end -= 2;
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goto again;
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}
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else
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{
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change = 1;
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*p = '\0';
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break;
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}
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}
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else if (*p == '.' && *(p + 1) == '.'
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&& (*(p + 2) == '/' || *(p + 2) == '\0'))
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{
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/* Handle "../foo" by moving "foo" one path element to the
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left. */
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char *b = p; /* not p-1 because P can equal PATH */
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/* Backtrack by one path element, but not past the beginning
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of PATH. */
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/* foo/bar/../baz */
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/* ^ p */
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/* ^ b */
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if (b > path)
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{
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/* Move backwards until B hits the beginning of the
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previous path element or the beginning of path. */
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for (--b; b > path && *(b - 1) != '/'; b--)
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;
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}
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change = 1;
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if (*(p + 2) == '/')
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{
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memmove (b, p + 3, end - (p + 3));
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end -= (p + 3) - b;
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p = b;
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}
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else
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{
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*b = '\0';
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break;
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}
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goto again;
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}
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else if (*p == '/')
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{
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/* Remove empty path elements. Not mandated by rfc1808 et
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al, but empty path elements are not all that useful, and
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the rest of Wget might not deal with them well. */
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char *q = p;
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while (*q == '/')
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++q;
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change = 1;
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if (*q == '\0')
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{
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*p = '\0';
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break;
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}
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memmove (p, q, end - q);
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end -= q - p;
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goto again;
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}
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/* Skip to the next path element. */
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while (*p && *p != '/')
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++p;
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if (*p == '\0')
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break;
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/* Make sure P points to the beginning of the next path element,
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which is location after the slash. */
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++p;
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}
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return change;
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}
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/* Resolve the result of "linking" a base URI (BASE) to a
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/* Resolve the result of "linking" a base URI (BASE) to a
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link-specified URI (LINK).
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link-specified URI (LINK).
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@ -1405,8 +1529,8 @@ find_last_char (const char *b, const char *e, char c)
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The parameters LINKLENGTH is useful if LINK is not zero-terminated.
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The parameters LINKLENGTH is useful if LINK is not zero-terminated.
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See uri_merge for a gentler interface to this functionality.
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See uri_merge for a gentler interface to this functionality.
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Perhaps this function should handle `./' and `../' so that the evil
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Perhaps this function should call path_simplify so that the callers
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path_simplify can go. */
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don't have to call url_parse unconditionally. */
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static char *
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static char *
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uri_merge_1 (const char *base, const char *link, int linklength, int no_scheme)
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uri_merge_1 (const char *base, const char *link, int linklength, int no_scheme)
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{
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{
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@ -1414,7 +1538,7 @@ uri_merge_1 (const char *base, const char *link, int linklength, int no_scheme)
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if (no_scheme)
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if (no_scheme)
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{
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{
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const char *end = base + urlpath_length (base);
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const char *end = base + path_length (base);
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if (!*link)
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if (!*link)
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{
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{
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@ -1723,6 +1847,10 @@ no_proxy_match (const char *host, const char **no_proxy)
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return !sufmatch (no_proxy, host);
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return !sufmatch (no_proxy, host);
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}
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}
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/* Support for converting links for local viewing in downloaded HTML
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files. This should be moved to another file, because it has
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nothing to do with processing URLs. */
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static void write_backup_file PARAMS ((const char *, downloaded_file_t));
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static void write_backup_file PARAMS ((const char *, downloaded_file_t));
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static const char *replace_attr PARAMS ((const char *, int, FILE *,
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static const char *replace_attr PARAMS ((const char *, int, FILE *,
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const char *));
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const char *));
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@ -2253,3 +2381,96 @@ downloaded_files_free (void)
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downloaded_files_hash = NULL;
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downloaded_files_hash = NULL;
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}
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}
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}
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}
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#if 0
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/* Debugging and testing support for path_simplify. */
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/* Debug: run path_simplify on PATH and return the result in a new
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string. Useful for calling from the debugger. */
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static char *
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ps (char *path)
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{
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char *copy = xstrdup (path);
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path_simplify (copy);
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return copy;
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}
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static void
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run_test (char *test, char *expected_result, int expected_change)
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{
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char *test_copy = xstrdup (test);
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int modified = path_simplify (test_copy);
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if (0 != strcmp (test_copy, expected_result))
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{
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printf ("Failed path_simplify(\"%s\"): expected \"%s\", got \"%s\".\n",
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test, expected_result, test_copy);
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}
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if (modified != expected_change)
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{
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if (expected_change == 1)
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printf ("Expected no modification with path_simplify(\"%s\").\n",
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test);
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else
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printf ("Expected modification with path_simplify(\"%s\").\n",
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test);
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}
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xfree (test_copy);
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}
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static void
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test_path_simplify (void)
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{
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static struct {
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char *test, *result;
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int should_modify;
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} tests[] = {
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{ "", "", 0 },
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{ ".", "", 1 },
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{ "..", "", 1 },
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{ "foo", "foo", 0 },
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{ "foo/bar", "foo/bar", 0 },
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{ "foo///bar", "foo/bar", 1 },
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{ "foo/.", "foo/", 1 },
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{ "foo/./", "foo/", 1 },
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{ "foo./", "foo./", 0 },
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{ "foo/../bar", "bar", 1 },
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{ "foo/../bar/", "bar/", 1 },
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{ "foo/bar/..", "foo/", 1 },
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{ "foo/bar/../x", "foo/x", 1 },
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{ "foo/bar/../x/", "foo/x/", 1 },
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{ "foo/..", "", 1 },
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{ "foo/../..", "", 1 },
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{ "a/b/../../c", "c", 1 },
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{ "./a/../b", "b", 1 }
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};
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int i;
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for (i = 0; i < ARRAY_SIZE (tests); i++)
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{
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char *test = tests[i].test;
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char *expected_result = tests[i].result;
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int expected_change = tests[i].should_modify;
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run_test (test, expected_result, expected_change);
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}
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/* Now run all the tests with a leading slash before the test case,
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to prove that the slash is being preserved. */
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for (i = 0; i < ARRAY_SIZE (tests); i++)
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{
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char *test, *expected_result;
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int expected_change = tests[i].should_modify;
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test = xmalloc (1 + strlen (tests[i].test) + 1);
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sprintf (test, "/%s", tests[i].test);
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expected_result = xmalloc (1 + strlen (tests[i].result) + 1);
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sprintf (expected_result, "/%s", tests[i].result);
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run_test (test, expected_result, expected_change);
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xfree (test);
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xfree (expected_result);
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}
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|
}
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#endif
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213
src/utils.c
213
src/utils.c
@ -466,126 +466,6 @@ fork_to_background (void)
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}
|
}
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#endif /* not WINDOWS */
|
#endif /* not WINDOWS */
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|
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/* Resolve "." and ".." elements of PATH by destructively modifying
|
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PATH. "." is resolved by removing that path element, and ".." is
|
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resolved by removing the preceding path element. Leading and
|
|
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trailing slashes are preserved.
|
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|
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Return non-zero if any changes have been made.
|
|
||||||
|
|
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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
|
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path_simplify (char *path)
|
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{
|
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int change = 0;
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char *p, *end;
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|
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if (path[0] == '/')
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++path; /* preserve the leading '/'. */
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|
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p = path;
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end = p + strlen (p) + 1; /* position past the terminating zero. */
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|
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while (1)
|
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{
|
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again:
|
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/* P should point to the beginning of a path element. */
|
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||||||
|
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if (*p == '.' && (*(p + 1) == '/' || *(p + 1) == '\0'))
|
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||||||
{
|
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/* Handle "./foo" by moving "foo" two characters to the
|
|
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left. */
|
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if (*(p + 1) == '/')
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{
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change = 1;
|
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memmove (p, p + 2, end - p);
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end -= 2;
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goto again;
|
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||||||
}
|
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else
|
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||||||
{
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change = 1;
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||||||
*p = '\0';
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||||||
break;
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}
|
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||||||
}
|
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else if (*p == '.' && *(p + 1) == '.'
|
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&& (*(p + 2) == '/' || *(p + 2) == '\0'))
|
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||||||
{
|
|
||||||
/* 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. */
|
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||||||
|
|
||||||
/* foo/bar/../baz */
|
|
||||||
/* ^ p */
|
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/* ^ b */
|
|
||||||
|
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if (b > path)
|
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{
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|
||||||
/* 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;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* "Touch" FILE, i.e. make its atime and mtime equal to the time
|
/* "Touch" FILE, i.e. make its atime and mtime equal to the time
|
||||||
specified with TM. */
|
specified with TM. */
|
||||||
void
|
void
|
||||||
@ -1807,96 +1687,3 @@ debug_test_md5 (char *buf)
|
|||||||
return res;
|
return res;
|
||||||
}
|
}
|
||||||
#endif
|
#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
|
|
||||||
|
|||||||
@ -56,7 +56,6 @@ char **sepstring PARAMS ((const char *));
|
|||||||
int frontcmp PARAMS ((const char *, const char *));
|
int frontcmp PARAMS ((const char *, const char *));
|
||||||
char *pwd_cuserid PARAMS ((char *));
|
char *pwd_cuserid PARAMS ((char *));
|
||||||
void fork_to_background PARAMS ((void));
|
void fork_to_background PARAMS ((void));
|
||||||
int path_simplify PARAMS ((char *));
|
|
||||||
|
|
||||||
void touch PARAMS ((const char *, time_t));
|
void touch PARAMS ((const char *, time_t));
|
||||||
int remove_link PARAMS ((const char *));
|
int remove_link PARAMS ((const char *));
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user