commit 2253697a04c926edb1a5f18727a6cd24528730b1 Author: Nick Mathewson nickm@torproject.org Date: Fri May 13 16:18:53 2011 -0400

New smartlist function to see if two lists of strings are equal.

We'll use this to detect changes in CSV options. --- src/common/container.c | 19 +++++++++++++++++++ src/common/container.h | 2 ++ 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/src/common/container.c b/src/common/container.c index 09d4bb1..ca49cbb 100644 --- a/src/common/container.c +++ b/src/common/container.c @@ -215,6 +215,25 @@ smartlist_string_num_isin(const smartlist_t *sl, int num) return smartlist_string_isin(sl, buf); }

+/** Return true iff the two lists contain the same strings in the same + * order, or if they are both NULL. */ +int +smartlist_strings_eq(const smartlist_t *sl1, const smartlist_t *sl2) +{ + if (sl1 == NULL) + return sl2 == NULL; + if (sl2 == NULL) + return 0; + if (smartlist_len(sl1) != smartlist_len(sl2)) + return 0; + SMARTLIST_FOREACH(sl1, const char *, cp1, { + const char *cp2 = smartlist_get(sl2, cp1_sl_idx); + if (strcmp(cp1, cp2)) + return 0; + }); + return 1; +} + /** Return true iff <b>sl</b> has some element E such that * tor_memeq(E,<b>element</b>,DIGEST_LEN) */ diff --git a/src/common/container.h b/src/common/container.h index b39d4ca..f5e42de 100644 --- a/src/common/container.h +++ b/src/common/container.h @@ -42,6 +42,8 @@ int smartlist_string_pos(const smartlist_t *, const char *elt) ATTR_PURE; int smartlist_string_isin_case(const smartlist_t *sl, const char *element) ATTR_PURE; int smartlist_string_num_isin(const smartlist_t *sl, int num) ATTR_PURE; +int smartlist_strings_eq(const smartlist_t *sl1, const smartlist_t *sl2) + ATTR_PURE; int smartlist_digest_isin(const smartlist_t *sl, const char *element) ATTR_PURE; int smartlist_overlap(const smartlist_t *sl1, const smartlist_t *sl2)