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[tor-commits] [tor/master] Split container.c based on container types, and minimize includes
commit 657ff55408d82f49fc9599cb662702cdc0995f08
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date: Thu Jun 21 16:25:31 2018 -0400
Split container.c based on container types, and minimize includes
Minimizing includes revealed other places includes were necessary.
---
src/common/util_bug.h | 1 +
src/lib/container/bitarray.h | 80 +++
src/lib/container/bloomfilt.c | 49 ++
src/lib/container/bloomfilt.h | 58 ++
src/lib/container/container.h | 745 +------------------------
src/lib/container/include.am | 12 +-
src/lib/container/map.c | 413 ++++++++++++++
src/lib/container/map.h | 255 +++++++++
src/lib/container/order.c | 51 ++
src/lib/container/order.h | 54 ++
src/lib/container/{container.c => smartlist.c} | 461 +--------------
src/lib/container/smartlist.h | 351 ++++++++++++
src/lib/malloc/util_malloc.c | 1 -
src/lib/malloc/util_malloc.h | 2 +
14 files changed, 1332 insertions(+), 1201 deletions(-)
diff --git a/src/common/util_bug.h b/src/common/util_bug.h
index 9659f59b7..fb5ab25c1 100644
--- a/src/common/util_bug.h
+++ b/src/common/util_bug.h
@@ -37,6 +37,7 @@
#define TOR_UTIL_BUG_H
#include "orconfig.h"
+#include <stdlib.h>
#include "common/compat.h"
#include "lib/testsupport/testsupport.h"
diff --git a/src/lib/container/bitarray.h b/src/lib/container/bitarray.h
new file mode 100644
index 000000000..2cea433fb
--- /dev/null
+++ b/src/lib/container/bitarray.h
@@ -0,0 +1,80 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_BITARRAY_H
+#define TOR_BITARRAY_H
+
+#include "orconfig.h"
+#include <string.h>
+#include "lib/cc/torint.h"
+#include "lib/malloc/util_malloc.h"
+
+#if SIZEOF_INT == 4
+#define BITARRAY_SHIFT 5
+#elif SIZEOF_INT == 8
+#define BITARRAY_SHIFT 6
+#else
+#error "int is neither 4 nor 8 bytes. I can't deal with that."
+#endif /* SIZEOF_INT == 4 || ... */
+#define BITARRAY_MASK ((1u<<BITARRAY_SHIFT)-1)
+
+/** A random-access array of one-bit-wide elements. */
+typedef unsigned int bitarray_t;
+/** Create a new bit array that can hold <b>n_bits</b> bits. */
+static inline bitarray_t *
+bitarray_init_zero(unsigned int n_bits)
+{
+ /* round up to the next int. */
+ size_t sz = (n_bits+BITARRAY_MASK) >> BITARRAY_SHIFT;
+ return tor_calloc(sz, sizeof(unsigned int));
+}
+/** Expand <b>ba</b> from holding <b>n_bits_old</b> to <b>n_bits_new</b>,
+ * clearing all new bits. Returns a possibly changed pointer to the
+ * bitarray. */
+static inline bitarray_t *
+bitarray_expand(bitarray_t *ba,
+ unsigned int n_bits_old, unsigned int n_bits_new)
+{
+ size_t sz_old = (n_bits_old+BITARRAY_MASK) >> BITARRAY_SHIFT;
+ size_t sz_new = (n_bits_new+BITARRAY_MASK) >> BITARRAY_SHIFT;
+ char *ptr;
+ if (sz_new <= sz_old)
+ return ba;
+ ptr = tor_reallocarray(ba, sz_new, sizeof(unsigned int));
+ /* This memset does nothing to the older excess bytes. But they were
+ * already set to 0 by bitarry_init_zero. */
+ memset(ptr+sz_old*sizeof(unsigned int), 0,
+ (sz_new-sz_old)*sizeof(unsigned int));
+ return (bitarray_t*) ptr;
+}
+/** Free the bit array <b>ba</b>. */
+static inline void
+bitarray_free_(bitarray_t *ba)
+{
+ tor_free(ba);
+}
+#define bitarray_free(ba) FREE_AND_NULL(bitarray_t, bitarray_free_, (ba))
+
+/** Set the <b>bit</b>th bit in <b>b</b> to 1. */
+static inline void
+bitarray_set(bitarray_t *b, int bit)
+{
+ b[bit >> BITARRAY_SHIFT] |= (1u << (bit & BITARRAY_MASK));
+}
+/** Set the <b>bit</b>th bit in <b>b</b> to 0. */
+static inline void
+bitarray_clear(bitarray_t *b, int bit)
+{
+ b[bit >> BITARRAY_SHIFT] &= ~ (1u << (bit & BITARRAY_MASK));
+}
+/** Return true iff <b>bit</b>th bit in <b>b</b> is nonzero. NOTE: does
+ * not necessarily return 1 on true. */
+static inline unsigned int
+bitarray_is_set(bitarray_t *b, int bit)
+{
+ return b[bit >> BITARRAY_SHIFT] & (1u << (bit & BITARRAY_MASK));
+}
+
+#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/container/bloomfilt.c b/src/lib/container/bloomfilt.c
new file mode 100644
index 000000000..4847408ee
--- /dev/null
+++ b/src/lib/container/bloomfilt.c
@@ -0,0 +1,49 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file container.c
+ * \brief Implements a smartlist (a resizable array) along
+ * with helper functions to use smartlists. Also includes
+ * hash table implementations of a string-to-void* map, and of
+ * a digest-to-void* map.
+ **/
+
+#include <stdlib.h>
+#include "lib/malloc/util_malloc.h"
+#include "lib/container/bloomfilt.h"
+#include "common/util.h" // For tor_log2
+
+/** Return a newly allocated digestset_t, optimized to hold a total of
+ * <b>max_elements</b> digests with a reasonably low false positive weight. */
+digestset_t *
+digestset_new(int max_elements)
+{
+ /* The probability of false positives is about P=(1 - exp(-kn/m))^k, where k
+ * is the number of hash functions per entry, m is the bits in the array,
+ * and n is the number of elements inserted. For us, k==4, n<=max_elements,
+ * and m==n_bits= approximately max_elements*32. This gives
+ * P<(1-exp(-4*n/(32*n)))^4 == (1-exp(1/-8))^4 == .00019
+ *
+ * It would be more optimal in space vs false positives to get this false
+ * positive rate by going for k==13, and m==18.5n, but we also want to
+ * conserve CPU, and k==13 is pretty big.
+ */
+ int n_bits = 1u << (tor_log2(max_elements)+5);
+ digestset_t *r = tor_malloc(sizeof(digestset_t));
+ r->mask = n_bits - 1;
+ r->ba = bitarray_init_zero(n_bits);
+ return r;
+}
+
+/** Free all storage held in <b>set</b>. */
+void
+digestset_free_(digestset_t *set)
+{
+ if (!set)
+ return;
+ bitarray_free(set->ba);
+ tor_free(set);
+}
diff --git a/src/lib/container/bloomfilt.h b/src/lib/container/bloomfilt.h
new file mode 100644
index 000000000..adcdb10fc
--- /dev/null
+++ b/src/lib/container/bloomfilt.h
@@ -0,0 +1,58 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_BLOOMFILT_H
+#define TOR_BLOOMFILT_H
+
+#include "orconfig.h"
+#include "lib/cc/torint.h"
+#include "lib/container/bitarray.h"
+#include "siphash.h"
+
+/** A set of digests, implemented as a Bloom filter. */
+typedef struct {
+ int mask; /**< One less than the number of bits in <b>ba</b>; always one less
+ * than a power of two. */
+ bitarray_t *ba; /**< A bit array to implement the Bloom filter. */
+} digestset_t;
+
+#define BIT(n) ((n) & set->mask)
+/** Add the digest <b>digest</b> to <b>set</b>. */
+static inline void
+digestset_add(digestset_t *set, const char *digest)
+{
+ const uint64_t x = siphash24g(digest, 20);
+ const uint32_t d1 = (uint32_t) x;
+ const uint32_t d2 = (uint32_t)( (x>>16) + x);
+ const uint32_t d3 = (uint32_t)( (x>>32) + x);
+ const uint32_t d4 = (uint32_t)( (x>>48) + x);
+ bitarray_set(set->ba, BIT(d1));
+ bitarray_set(set->ba, BIT(d2));
+ bitarray_set(set->ba, BIT(d3));
+ bitarray_set(set->ba, BIT(d4));
+}
+
+/** If <b>digest</b> is in <b>set</b>, return nonzero. Otherwise,
+ * <em>probably</em> return zero. */
+static inline int
+digestset_contains(const digestset_t *set, const char *digest)
+{
+ const uint64_t x = siphash24g(digest, 20);
+ const uint32_t d1 = (uint32_t) x;
+ const uint32_t d2 = (uint32_t)( (x>>16) + x);
+ const uint32_t d3 = (uint32_t)( (x>>32) + x);
+ const uint32_t d4 = (uint32_t)( (x>>48) + x);
+ return bitarray_is_set(set->ba, BIT(d1)) &&
+ bitarray_is_set(set->ba, BIT(d2)) &&
+ bitarray_is_set(set->ba, BIT(d3)) &&
+ bitarray_is_set(set->ba, BIT(d4));
+}
+#undef BIT
+
+digestset_t *digestset_new(int max_elements);
+void digestset_free_(digestset_t* set);
+#define digestset_free(set) FREE_AND_NULL(digestset_t, digestset_free_, (set))
+
+#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/container/container.h b/src/lib/container/container.h
index c45bfc359..ba8983846 100644
--- a/src/lib/container/container.h
+++ b/src/lib/container/container.h
@@ -6,745 +6,10 @@
#ifndef TOR_CONTAINER_H
#define TOR_CONTAINER_H
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "lib/cc/compat_compiler.h"
-#include "lib/cc/torint.h"
-#include "lib/testsupport/testsupport.h"
-#include "lib/malloc/util_malloc.h"
-#include "common/util_bug.h"
-#include "siphash.h"
-
-/** A resizeable list of pointers, with associated helpful functionality.
- *
- * The members of this struct are exposed only so that macros and inlines can
- * use them; all access to smartlist internals should go through the functions
- * and macros defined here.
- **/
-typedef struct smartlist_t {
- /** @{ */
- /** <b>list</b> has enough capacity to store exactly <b>capacity</b> elements
- * before it needs to be resized. Only the first <b>num_used</b> (\<=
- * capacity) elements point to valid data.
- */
- void **list;
- int num_used;
- int capacity;
- /** @} */
-} smartlist_t;
-
-MOCK_DECL(smartlist_t *, smartlist_new, (void));
-MOCK_DECL(void, smartlist_free_, (smartlist_t *sl));
-#define smartlist_free(sl) FREE_AND_NULL(smartlist_t, smartlist_free_, (sl))
-
-void smartlist_clear(smartlist_t *sl);
-void smartlist_add(smartlist_t *sl, void *element);
-void smartlist_add_all(smartlist_t *sl, const smartlist_t *s2);
-void smartlist_add_strdup(struct smartlist_t *sl, const char *string);
-void smartlist_remove(smartlist_t *sl, const void *element);
-void smartlist_remove_keeporder(smartlist_t *sl, const void *element);
-void *smartlist_pop_last(smartlist_t *sl);
-void smartlist_reverse(smartlist_t *sl);
-void smartlist_string_remove(smartlist_t *sl, const char *element);
-int smartlist_contains(const smartlist_t *sl, const void *element);
-int smartlist_contains_string(const smartlist_t *sl, const char *element);
-int smartlist_pos(const smartlist_t *sl, const void *element);
-int smartlist_string_pos(const smartlist_t *, const char *elt);
-int smartlist_contains_string_case(const smartlist_t *sl, const char *element);
-int smartlist_contains_int_as_string(const smartlist_t *sl, int num);
-int smartlist_strings_eq(const smartlist_t *sl1, const smartlist_t *sl2);
-int smartlist_contains_digest(const smartlist_t *sl, const char *element);
-int smartlist_ints_eq(const smartlist_t *sl1, const smartlist_t *sl2);
-int smartlist_overlap(const smartlist_t *sl1, const smartlist_t *sl2);
-void smartlist_intersect(smartlist_t *sl1, const smartlist_t *sl2);
-void smartlist_subtract(smartlist_t *sl1, const smartlist_t *sl2);
-
-/* smartlist_choose() is defined in crypto.[ch] */
-#ifdef DEBUG_SMARTLIST
-/** Return the number of items in sl.
- */
-static inline int smartlist_len(const smartlist_t *sl);
-static inline int smartlist_len(const smartlist_t *sl) {
- tor_assert(sl);
- return (sl)->num_used;
-}
-/** Return the <b>idx</b>th element of sl.
- */
-static inline void *smartlist_get(const smartlist_t *sl, int idx);
-static inline void *smartlist_get(const smartlist_t *sl, int idx) {
- tor_assert(sl);
- tor_assert(idx>=0);
- tor_assert(sl->num_used > idx);
- return sl->list[idx];
-}
-static inline void smartlist_set(smartlist_t *sl, int idx, void *val) {
- tor_assert(sl);
- tor_assert(idx>=0);
- tor_assert(sl->num_used > idx);
- sl->list[idx] = val;
-}
-#else /* !(defined(DEBUG_SMARTLIST)) */
-#define smartlist_len(sl) ((sl)->num_used)
-#define smartlist_get(sl, idx) ((sl)->list[idx])
-#define smartlist_set(sl, idx, val) ((sl)->list[idx] = (val))
-#endif /* defined(DEBUG_SMARTLIST) */
-
-/** Exchange the elements at indices <b>idx1</b> and <b>idx2</b> of the
- * smartlist <b>sl</b>. */
-static inline void smartlist_swap(smartlist_t *sl, int idx1, int idx2)
-{
- if (idx1 != idx2) {
- void *elt = smartlist_get(sl, idx1);
- smartlist_set(sl, idx1, smartlist_get(sl, idx2));
- smartlist_set(sl, idx2, elt);
- }
-}
-
-void smartlist_del(smartlist_t *sl, int idx);
-void smartlist_del_keeporder(smartlist_t *sl, int idx);
-void smartlist_insert(smartlist_t *sl, int idx, void *val);
-void smartlist_sort(smartlist_t *sl,
- int (*compare)(const void **a, const void **b));
-void *smartlist_get_most_frequent_(const smartlist_t *sl,
- int (*compare)(const void **a, const void **b),
- int *count_out);
-#define smartlist_get_most_frequent(sl, compare) \
- smartlist_get_most_frequent_((sl), (compare), NULL)
-void smartlist_uniq(smartlist_t *sl,
- int (*compare)(const void **a, const void **b),
- void (*free_fn)(void *elt));
-
-void smartlist_sort_strings(smartlist_t *sl);
-void smartlist_sort_digests(smartlist_t *sl);
-void smartlist_sort_digests256(smartlist_t *sl);
-void smartlist_sort_pointers(smartlist_t *sl);
-
-const char *smartlist_get_most_frequent_string(smartlist_t *sl);
-const char *smartlist_get_most_frequent_string_(smartlist_t *sl,
- int *count_out);
-const uint8_t *smartlist_get_most_frequent_digest256(smartlist_t *sl);
-
-void smartlist_uniq_strings(smartlist_t *sl);
-void smartlist_uniq_digests(smartlist_t *sl);
-void smartlist_uniq_digests256(smartlist_t *sl);
-void *smartlist_bsearch(smartlist_t *sl, const void *key,
- int (*compare)(const void *key, const void **member));
-int smartlist_bsearch_idx(const smartlist_t *sl, const void *key,
- int (*compare)(const void *key, const void **member),
- int *found_out);
-
-void smartlist_pqueue_add(smartlist_t *sl,
- int (*compare)(const void *a, const void *b),
- int idx_field_offset,
- void *item);
-void *smartlist_pqueue_pop(smartlist_t *sl,
- int (*compare)(const void *a, const void *b),
- int idx_field_offset);
-void smartlist_pqueue_remove(smartlist_t *sl,
- int (*compare)(const void *a, const void *b),
- int idx_field_offset,
- void *item);
-void smartlist_pqueue_assert_ok(smartlist_t *sl,
- int (*compare)(const void *a, const void *b),
- int idx_field_offset);
-
-#define SPLIT_SKIP_SPACE 0x01
-#define SPLIT_IGNORE_BLANK 0x02
-#define SPLIT_STRIP_SPACE 0x04
-int smartlist_split_string(smartlist_t *sl, const char *str, const char *sep,
- int flags, int max);
-char *smartlist_join_strings(smartlist_t *sl, const char *join, int terminate,
- size_t *len_out) ATTR_MALLOC;
-char *smartlist_join_strings2(smartlist_t *sl, const char *join,
- size_t join_len, int terminate, size_t *len_out)
- ATTR_MALLOC;
-
-/** Iterate over the items in a smartlist <b>sl</b>, in order. For each item,
- * assign it to a new local variable of type <b>type</b> named <b>var</b>, and
- * execute the statements inside the loop body. Inside the loop, the loop
- * index can be accessed as <b>var</b>_sl_idx and the length of the list can
- * be accessed as <b>var</b>_sl_len.
- *
- * NOTE: Do not change the length of the list while the loop is in progress,
- * unless you adjust the _sl_len variable correspondingly. See second example
- * below.
- *
- * Example use:
- * <pre>
- * smartlist_t *list = smartlist_split("A:B:C", ":", 0, 0);
- * SMARTLIST_FOREACH_BEGIN(list, char *, cp) {
- * printf("%d: %s\n", cp_sl_idx, cp);
- * tor_free(cp);
- * } SMARTLIST_FOREACH_END(cp);
- * smartlist_free(list);
- * </pre>
- *
- * Example use (advanced):
- * <pre>
- * SMARTLIST_FOREACH_BEGIN(list, char *, cp) {
- * if (!strcmp(cp, "junk")) {
- * tor_free(cp);
- * SMARTLIST_DEL_CURRENT(list, cp);
- * }
- * } SMARTLIST_FOREACH_END(cp);
- * </pre>
- */
-/* Note: these macros use token pasting, and reach into smartlist internals.
- * This can make them a little daunting. Here's the approximate unpacking of
- * the above examples, for entertainment value:
- *
- * <pre>
- * smartlist_t *list = smartlist_split("A:B:C", ":", 0, 0);
- * {
- * int cp_sl_idx, cp_sl_len = smartlist_len(list);
- * char *cp;
- * for (cp_sl_idx = 0; cp_sl_idx < cp_sl_len; ++cp_sl_idx) {
- * cp = smartlist_get(list, cp_sl_idx);
- * printf("%d: %s\n", cp_sl_idx, cp);
- * tor_free(cp);
- * }
- * }
- * smartlist_free(list);
- * </pre>
- *
- * <pre>
- * {
- * int cp_sl_idx, cp_sl_len = smartlist_len(list);
- * char *cp;
- * for (cp_sl_idx = 0; cp_sl_idx < cp_sl_len; ++cp_sl_idx) {
- * cp = smartlist_get(list, cp_sl_idx);
- * if (!strcmp(cp, "junk")) {
- * tor_free(cp);
- * smartlist_del(list, cp_sl_idx);
- * --cp_sl_idx;
- * --cp_sl_len;
- * }
- * }
- * }
- * </pre>
- */
-#define SMARTLIST_FOREACH_BEGIN(sl, type, var) \
- STMT_BEGIN \
- int var ## _sl_idx, var ## _sl_len=(sl)->num_used; \
- type var; \
- for (var ## _sl_idx = 0; var ## _sl_idx < var ## _sl_len; \
- ++var ## _sl_idx) { \
- var = (sl)->list[var ## _sl_idx];
-
-#define SMARTLIST_FOREACH_END(var) \
- var = NULL; \
- (void) var ## _sl_idx; \
- } STMT_END
-
-/**
- * An alias for SMARTLIST_FOREACH_BEGIN and SMARTLIST_FOREACH_END, using
- * <b>cmd</b> as the loop body. This wrapper is here for convenience with
- * very short loops.
- *
- * By convention, we do not use this for loops which nest, or for loops over
- * 10 lines or so. Use SMARTLIST_FOREACH_{BEGIN,END} for those.
- */
-#define SMARTLIST_FOREACH(sl, type, var, cmd) \
- SMARTLIST_FOREACH_BEGIN(sl,type,var) { \
- cmd; \
- } SMARTLIST_FOREACH_END(var)
-
-/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
- * with the variable <b>var</b>, remove the current element in a way that
- * won't confuse the loop. */
-#define SMARTLIST_DEL_CURRENT(sl, var) \
- STMT_BEGIN \
- smartlist_del(sl, var ## _sl_idx); \
- --var ## _sl_idx; \
- --var ## _sl_len; \
- STMT_END
-
-/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
- * with the variable <b>var</b>, remove the current element in a way that
- * won't confuse the loop. */
-#define SMARTLIST_DEL_CURRENT_KEEPORDER(sl, var) \
- STMT_BEGIN \
- smartlist_del_keeporder(sl, var ## _sl_idx); \
- --var ## _sl_idx; \
- --var ## _sl_len; \
- STMT_END
-
-/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
- * with the variable <b>var</b>, replace the current element with <b>val</b>.
- * Does not deallocate the current value of <b>var</b>.
- */
-#define SMARTLIST_REPLACE_CURRENT(sl, var, val) \
- STMT_BEGIN \
- smartlist_set(sl, var ## _sl_idx, val); \
- STMT_END
-
-/* Helper: Given two lists of items, possibly of different types, such that
- * both lists are sorted on some common field (as determined by a comparison
- * expression <b>cmpexpr</b>), and such that one list (<b>sl1</b>) has no
- * duplicates on the common field, loop through the lists in lockstep, and
- * execute <b>unmatched_var2</b> on items in var2 that do not appear in
- * var1.
- *
- * WARNING: It isn't safe to add remove elements from either list while the
- * loop is in progress.
- *
- * Example use:
- * SMARTLIST_FOREACH_JOIN(routerstatus_list, routerstatus_t *, rs,
- * routerinfo_list, routerinfo_t *, ri,
- * tor_memcmp(rs->identity_digest, ri->identity_digest, 20),
- * log_info(LD_GENERAL,"No match for %s", ri->nickname)) {
- * log_info(LD_GENERAL, "%s matches routerstatus %p", ri->nickname, rs);
- * } SMARTLIST_FOREACH_JOIN_END(rs, ri);
- **/
-/* The example above unpacks (approximately) to:
- * int rs_sl_idx = 0, rs_sl_len = smartlist_len(routerstatus_list);
- * int ri_sl_idx, ri_sl_len = smartlist_len(routerinfo_list);
- * int rs_ri_cmp;
- * routerstatus_t *rs;
- * routerinfo_t *ri;
- * for (; ri_sl_idx < ri_sl_len; ++ri_sl_idx) {
- * ri = smartlist_get(routerinfo_list, ri_sl_idx);
- * while (rs_sl_idx < rs_sl_len) {
- * rs = smartlist_get(routerstatus_list, rs_sl_idx);
- * rs_ri_cmp = tor_memcmp(rs->identity_digest, ri->identity_digest, 20);
- * if (rs_ri_cmp > 0) {
- * break;
- * } else if (rs_ri_cmp == 0) {
- * goto matched_ri;
- * } else {
- * ++rs_sl_idx;
- * }
- * }
- * log_info(LD_GENERAL,"No match for %s", ri->nickname);
- * continue;
- * matched_ri: {
- * log_info(LD_GENERAL,"%s matches with routerstatus %p",ri->nickname,rs);
- * }
- * }
- */
-#define SMARTLIST_FOREACH_JOIN(sl1, type1, var1, sl2, type2, var2, \
- cmpexpr, unmatched_var2) \
- STMT_BEGIN \
- int var1 ## _sl_idx = 0, var1 ## _sl_len=(sl1)->num_used; \
- int var2 ## _sl_idx = 0, var2 ## _sl_len=(sl2)->num_used; \
- int var1 ## _ ## var2 ## _cmp; \
- type1 var1; \
- type2 var2; \
- for (; var2##_sl_idx < var2##_sl_len; ++var2##_sl_idx) { \
- var2 = (sl2)->list[var2##_sl_idx]; \
- while (var1##_sl_idx < var1##_sl_len) { \
- var1 = (sl1)->list[var1##_sl_idx]; \
- var1##_##var2##_cmp = (cmpexpr); \
- if (var1##_##var2##_cmp > 0) { \
- break; \
- } else if (var1##_##var2##_cmp == 0) { \
- goto matched_##var2; \
- } else { \
- ++var1##_sl_idx; \
- } \
- } \
- /* Ran out of v1, or no match for var2. */ \
- unmatched_var2; \
- continue; \
- matched_##var2: ; \
-
-#define SMARTLIST_FOREACH_JOIN_END(var1, var2) \
- } \
- STMT_END
-
-#define DECLARE_MAP_FNS(maptype, keytype, prefix) \
- typedef struct maptype maptype; \
- typedef struct prefix##entry_t *prefix##iter_t; \
- MOCK_DECL(maptype*, prefix##new, (void)); \
- void* prefix##set(maptype *map, keytype key, void *val); \
- void* prefix##get(const maptype *map, keytype key); \
- void* prefix##remove(maptype *map, keytype key); \
- MOCK_DECL(void, prefix##free_, (maptype *map, void (*free_val)(void*))); \
- int prefix##isempty(const maptype *map); \
- int prefix##size(const maptype *map); \
- prefix##iter_t *prefix##iter_init(maptype *map); \
- prefix##iter_t *prefix##iter_next(maptype *map, prefix##iter_t *iter); \
- prefix##iter_t *prefix##iter_next_rmv(maptype *map, prefix##iter_t *iter); \
- void prefix##iter_get(prefix##iter_t *iter, keytype *keyp, void **valp); \
- int prefix##iter_done(prefix##iter_t *iter); \
- void prefix##assert_ok(const maptype *map)
-
-/* Map from const char * to void *. Implemented with a hash table. */
-DECLARE_MAP_FNS(strmap_t, const char *, strmap_);
-/* Map from const char[DIGEST_LEN] to void *. Implemented with a hash table. */
-DECLARE_MAP_FNS(digestmap_t, const char *, digestmap_);
-/* Map from const uint8_t[DIGEST256_LEN] to void *. Implemented with a hash
- * table. */
-DECLARE_MAP_FNS(digest256map_t, const uint8_t *, digest256map_);
-
-#define MAP_FREE_AND_NULL(maptype, map, fn) \
- do { \
- maptype ## _free_((map), (fn)); \
- (map) = NULL; \
- } while (0)
-
-#define strmap_free(map, fn) MAP_FREE_AND_NULL(strmap, (map), (fn))
-#define digestmap_free(map, fn) MAP_FREE_AND_NULL(digestmap, (map), (fn))
-#define digest256map_free(map, fn) MAP_FREE_AND_NULL(digest256map, (map), (fn))
-
-#undef DECLARE_MAP_FNS
-
-/** Iterates over the key-value pairs in a map <b>map</b> in order.
- * <b>prefix</b> is as for DECLARE_MAP_FNS (i.e., strmap_ or digestmap_).
- * The map's keys and values are of type keytype and valtype respectively;
- * each iteration assigns them to keyvar and valvar.
- *
- * Example use:
- * MAP_FOREACH(digestmap_, m, const char *, k, routerinfo_t *, r) {
- * // use k and r
- * } MAP_FOREACH_END.
- */
-/* Unpacks to, approximately:
- * {
- * digestmap_iter_t *k_iter;
- * for (k_iter = digestmap_iter_init(m); !digestmap_iter_done(k_iter);
- * k_iter = digestmap_iter_next(m, k_iter)) {
- * const char *k;
- * void *r_voidp;
- * routerinfo_t *r;
- * digestmap_iter_get(k_iter, &k, &r_voidp);
- * r = r_voidp;
- * // use k and r
- * }
- * }
- */
-#define MAP_FOREACH(prefix, map, keytype, keyvar, valtype, valvar) \
- STMT_BEGIN \
- prefix##iter_t *keyvar##_iter; \
- for (keyvar##_iter = prefix##iter_init(map); \
- !prefix##iter_done(keyvar##_iter); \
- keyvar##_iter = prefix##iter_next(map, keyvar##_iter)) { \
- keytype keyvar; \
- void *valvar##_voidp; \
- valtype valvar; \
- prefix##iter_get(keyvar##_iter, &keyvar, &valvar##_voidp); \
- valvar = valvar##_voidp;
-
-/** As MAP_FOREACH, except allows members to be removed from the map
- * during the iteration via MAP_DEL_CURRENT. Example use:
- *
- * Example use:
- * MAP_FOREACH(digestmap_, m, const char *, k, routerinfo_t *, r) {
- * if (is_very_old(r))
- * MAP_DEL_CURRENT(k);
- * } MAP_FOREACH_END.
- **/
-/* Unpacks to, approximately:
- * {
- * digestmap_iter_t *k_iter;
- * int k_del=0;
- * for (k_iter = digestmap_iter_init(m); !digestmap_iter_done(k_iter);
- * k_iter = k_del ? digestmap_iter_next(m, k_iter)
- * : digestmap_iter_next_rmv(m, k_iter)) {
- * const char *k;
- * void *r_voidp;
- * routerinfo_t *r;
- * k_del=0;
- * digestmap_iter_get(k_iter, &k, &r_voidp);
- * r = r_voidp;
- * if (is_very_old(r)) {
- * k_del = 1;
- * }
- * }
- * }
- */
-#define MAP_FOREACH_MODIFY(prefix, map, keytype, keyvar, valtype, valvar) \
- STMT_BEGIN \
- prefix##iter_t *keyvar##_iter; \
- int keyvar##_del=0; \
- for (keyvar##_iter = prefix##iter_init(map); \
- !prefix##iter_done(keyvar##_iter); \
- keyvar##_iter = keyvar##_del ? \
- prefix##iter_next_rmv(map, keyvar##_iter) : \
- prefix##iter_next(map, keyvar##_iter)) { \
- keytype keyvar; \
- void *valvar##_voidp; \
- valtype valvar; \
- keyvar##_del=0; \
- prefix##iter_get(keyvar##_iter, &keyvar, &valvar##_voidp); \
- valvar = valvar##_voidp;
-
-/** Used with MAP_FOREACH_MODIFY to remove the currently-iterated-upon
- * member of the map. */
-#define MAP_DEL_CURRENT(keyvar) \
- STMT_BEGIN \
- keyvar##_del = 1; \
- STMT_END
-
-/** Used to end a MAP_FOREACH() block. */
-#define MAP_FOREACH_END } STMT_END ;
-
-/** As MAP_FOREACH, but does not require declaration of prefix or keytype.
- * Example use:
- * DIGESTMAP_FOREACH(m, k, routerinfo_t *, r) {
- * // use k and r
- * } DIGESTMAP_FOREACH_END.
- */
-#define DIGESTMAP_FOREACH(map, keyvar, valtype, valvar) \
- MAP_FOREACH(digestmap_, map, const char *, keyvar, valtype, valvar)
-
-/** As MAP_FOREACH_MODIFY, but does not require declaration of prefix or
- * keytype.
- * Example use:
- * DIGESTMAP_FOREACH_MODIFY(m, k, routerinfo_t *, r) {
- * if (is_very_old(r))
- * MAP_DEL_CURRENT(k);
- * } DIGESTMAP_FOREACH_END.
- */
-#define DIGESTMAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
- MAP_FOREACH_MODIFY(digestmap_, map, const char *, keyvar, valtype, valvar)
-/** Used to end a DIGESTMAP_FOREACH() block. */
-#define DIGESTMAP_FOREACH_END MAP_FOREACH_END
-
-#define DIGEST256MAP_FOREACH(map, keyvar, valtype, valvar) \
- MAP_FOREACH(digest256map_, map, const uint8_t *, keyvar, valtype, valvar)
-#define DIGEST256MAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
- MAP_FOREACH_MODIFY(digest256map_, map, const uint8_t *, \
- keyvar, valtype, valvar)
-#define DIGEST256MAP_FOREACH_END MAP_FOREACH_END
-
-#define STRMAP_FOREACH(map, keyvar, valtype, valvar) \
- MAP_FOREACH(strmap_, map, const char *, keyvar, valtype, valvar)
-#define STRMAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
- MAP_FOREACH_MODIFY(strmap_, map, const char *, keyvar, valtype, valvar)
-#define STRMAP_FOREACH_END MAP_FOREACH_END
-
-void* strmap_set_lc(strmap_t *map, const char *key, void *val);
-void* strmap_get_lc(const strmap_t *map, const char *key);
-void* strmap_remove_lc(strmap_t *map, const char *key);
-
-#define DECLARE_TYPED_DIGESTMAP_FNS(prefix, maptype, valtype) \
- typedef struct maptype maptype; \
- typedef struct prefix##iter_t *prefix##iter_t; \
- ATTR_UNUSED static inline maptype* \
- prefix##new(void) \
- { \
- return (maptype*)digestmap_new(); \
- } \
- ATTR_UNUSED static inline digestmap_t* \
- prefix##to_digestmap(maptype *map) \
- { \
- return (digestmap_t*)map; \
- } \
- ATTR_UNUSED static inline valtype* \
- prefix##get(maptype *map, const char *key) \
- { \
- return (valtype*)digestmap_get((digestmap_t*)map, key); \
- } \
- ATTR_UNUSED static inline valtype* \
- prefix##set(maptype *map, const char *key, valtype *val) \
- { \
- return (valtype*)digestmap_set((digestmap_t*)map, key, val); \
- } \
- ATTR_UNUSED static inline valtype* \
- prefix##remove(maptype *map, const char *key) \
- { \
- return (valtype*)digestmap_remove((digestmap_t*)map, key); \
- } \
- ATTR_UNUSED static inline void \
- prefix##f##ree_(maptype *map, void (*free_val)(void*)) \
- { \
- digestmap_free_((digestmap_t*)map, free_val); \
- } \
- ATTR_UNUSED static inline int \
- prefix##isempty(maptype *map) \
- { \
- return digestmap_isempty((digestmap_t*)map); \
- } \
- ATTR_UNUSED static inline int \
- prefix##size(maptype *map) \
- { \
- return digestmap_size((digestmap_t*)map); \
- } \
- ATTR_UNUSED static inline \
- prefix##iter_t *prefix##iter_init(maptype *map) \
- { \
- return (prefix##iter_t*) digestmap_iter_init((digestmap_t*)map); \
- } \
- ATTR_UNUSED static inline \
- prefix##iter_t *prefix##iter_next(maptype *map, prefix##iter_t *iter) \
- { \
- return (prefix##iter_t*) digestmap_iter_next( \
- (digestmap_t*)map, (digestmap_iter_t*)iter); \
- } \
- ATTR_UNUSED static inline prefix##iter_t* \
- prefix##iter_next_rmv(maptype *map, prefix##iter_t *iter) \
- { \
- return (prefix##iter_t*) digestmap_iter_next_rmv( \
- (digestmap_t*)map, (digestmap_iter_t*)iter); \
- } \
- ATTR_UNUSED static inline void \
- prefix##iter_get(prefix##iter_t *iter, \
- const char **keyp, \
- valtype **valp) \
- { \
- void *v; \
- digestmap_iter_get((digestmap_iter_t*) iter, keyp, &v); \
- *valp = v; \
- } \
- ATTR_UNUSED static inline int \
- prefix##iter_done(prefix##iter_t *iter) \
- { \
- return digestmap_iter_done((digestmap_iter_t*)iter); \
- }
-
-#if SIZEOF_INT == 4
-#define BITARRAY_SHIFT 5
-#elif SIZEOF_INT == 8
-#define BITARRAY_SHIFT 6
-#else
-#error "int is neither 4 nor 8 bytes. I can't deal with that."
-#endif /* SIZEOF_INT == 4 || ... */
-#define BITARRAY_MASK ((1u<<BITARRAY_SHIFT)-1)
-
-/** A random-access array of one-bit-wide elements. */
-typedef unsigned int bitarray_t;
-/** Create a new bit array that can hold <b>n_bits</b> bits. */
-static inline bitarray_t *
-bitarray_init_zero(unsigned int n_bits)
-{
- /* round up to the next int. */
- size_t sz = (n_bits+BITARRAY_MASK) >> BITARRAY_SHIFT;
- return tor_calloc(sz, sizeof(unsigned int));
-}
-/** Expand <b>ba</b> from holding <b>n_bits_old</b> to <b>n_bits_new</b>,
- * clearing all new bits. Returns a possibly changed pointer to the
- * bitarray. */
-static inline bitarray_t *
-bitarray_expand(bitarray_t *ba,
- unsigned int n_bits_old, unsigned int n_bits_new)
-{
- size_t sz_old = (n_bits_old+BITARRAY_MASK) >> BITARRAY_SHIFT;
- size_t sz_new = (n_bits_new+BITARRAY_MASK) >> BITARRAY_SHIFT;
- char *ptr;
- if (sz_new <= sz_old)
- return ba;
- ptr = tor_reallocarray(ba, sz_new, sizeof(unsigned int));
- /* This memset does nothing to the older excess bytes. But they were
- * already set to 0 by bitarry_init_zero. */
- memset(ptr+sz_old*sizeof(unsigned int), 0,
- (sz_new-sz_old)*sizeof(unsigned int));
- return (bitarray_t*) ptr;
-}
-/** Free the bit array <b>ba</b>. */
-static inline void
-bitarray_free_(bitarray_t *ba)
-{
- tor_free(ba);
-}
-#define bitarray_free(ba) FREE_AND_NULL(bitarray_t, bitarray_free_, (ba))
-
-/** Set the <b>bit</b>th bit in <b>b</b> to 1. */
-static inline void
-bitarray_set(bitarray_t *b, int bit)
-{
- b[bit >> BITARRAY_SHIFT] |= (1u << (bit & BITARRAY_MASK));
-}
-/** Set the <b>bit</b>th bit in <b>b</b> to 0. */
-static inline void
-bitarray_clear(bitarray_t *b, int bit)
-{
- b[bit >> BITARRAY_SHIFT] &= ~ (1u << (bit & BITARRAY_MASK));
-}
-/** Return true iff <b>bit</b>th bit in <b>b</b> is nonzero. NOTE: does
- * not necessarily return 1 on true. */
-static inline unsigned int
-bitarray_is_set(bitarray_t *b, int bit)
-{
- return b[bit >> BITARRAY_SHIFT] & (1u << (bit & BITARRAY_MASK));
-}
-
-/** A set of digests, implemented as a Bloom filter. */
-typedef struct {
- int mask; /**< One less than the number of bits in <b>ba</b>; always one less
- * than a power of two. */
- bitarray_t *ba; /**< A bit array to implement the Bloom filter. */
-} digestset_t;
-
-#define BIT(n) ((n) & set->mask)
-/** Add the digest <b>digest</b> to <b>set</b>. */
-static inline void
-digestset_add(digestset_t *set, const char *digest)
-{
- const uint64_t x = siphash24g(digest, 20);
- const uint32_t d1 = (uint32_t) x;
- const uint32_t d2 = (uint32_t)( (x>>16) + x);
- const uint32_t d3 = (uint32_t)( (x>>32) + x);
- const uint32_t d4 = (uint32_t)( (x>>48) + x);
- bitarray_set(set->ba, BIT(d1));
- bitarray_set(set->ba, BIT(d2));
- bitarray_set(set->ba, BIT(d3));
- bitarray_set(set->ba, BIT(d4));
-}
-
-/** If <b>digest</b> is in <b>set</b>, return nonzero. Otherwise,
- * <em>probably</em> return zero. */
-static inline int
-digestset_contains(const digestset_t *set, const char *digest)
-{
- const uint64_t x = siphash24g(digest, 20);
- const uint32_t d1 = (uint32_t) x;
- const uint32_t d2 = (uint32_t)( (x>>16) + x);
- const uint32_t d3 = (uint32_t)( (x>>32) + x);
- const uint32_t d4 = (uint32_t)( (x>>48) + x);
- return bitarray_is_set(set->ba, BIT(d1)) &&
- bitarray_is_set(set->ba, BIT(d2)) &&
- bitarray_is_set(set->ba, BIT(d3)) &&
- bitarray_is_set(set->ba, BIT(d4));
-}
-#undef BIT
-
-digestset_t *digestset_new(int max_elements);
-void digestset_free_(digestset_t* set);
-#define digestset_free(set) FREE_AND_NULL(digestset_t, digestset_free_, (set))
-
-/* These functions, given an <b>array</b> of <b>n_elements</b>, return the
- * <b>nth</b> lowest element. <b>nth</b>=0 gives the lowest element;
- * <b>n_elements</b>-1 gives the highest; and (<b>n_elements</b>-1) / 2 gives
- * the median. As a side effect, the elements of <b>array</b> are sorted. */
-int find_nth_int(int *array, int n_elements, int nth);
-time_t find_nth_time(time_t *array, int n_elements, int nth);
-double find_nth_double(double *array, int n_elements, int nth);
-int32_t find_nth_int32(int32_t *array, int n_elements, int nth);
-uint32_t find_nth_uint32(uint32_t *array, int n_elements, int nth);
-long find_nth_long(long *array, int n_elements, int nth);
-static inline int
-median_int(int *array, int n_elements)
-{
- return find_nth_int(array, n_elements, (n_elements-1)/2);
-}
-static inline time_t
-median_time(time_t *array, int n_elements)
-{
- return find_nth_time(array, n_elements, (n_elements-1)/2);
-}
-static inline double
-median_double(double *array, int n_elements)
-{
- return find_nth_double(array, n_elements, (n_elements-1)/2);
-}
-static inline uint32_t
-median_uint32(uint32_t *array, int n_elements)
-{
- return find_nth_uint32(array, n_elements, (n_elements-1)/2);
-}
-static inline int32_t
-median_int32(int32_t *array, int n_elements)
-{
- return find_nth_int32(array, n_elements, (n_elements-1)/2);
-}
-
-static inline uint32_t
-third_quartile_uint32(uint32_t *array, int n_elements)
-{
- return find_nth_uint32(array, n_elements, (n_elements*3)/4);
-}
+#include "lib/container/smartlist.h"
+#include "lib/container/map.h"
+#include "lib/container/bitarray.h"
+#include "lib/container/bloomfilt.h"
+#include "lib/container/order.h"
#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/container/include.am b/src/lib/container/include.am
index d7648c80c..e2994674a 100644
--- a/src/lib/container/include.am
+++ b/src/lib/container/include.am
@@ -6,7 +6,10 @@ noinst_LIBRARIES += src/lib/libtor-container-testing.a
endif
src_lib_libtor_container_a_SOURCES = \
- src/lib/container/container.c
+ src/lib/container/bloomfilt.c \
+ src/lib/container/map.c \
+ src/lib/container/order.c \
+ src/lib/container/smartlist.c
src_lib_libtor_container_testing_a_SOURCES = \
$(src_lib_libtor_container_a_SOURCES)
@@ -14,4 +17,9 @@ src_lib_libtor_container_testing_a_CPPFLAGS = $(AM_CPPFLAGS) $(TEST_CPPFLAGS)
src_lib_libtor_container_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
noinst_HEADERS += \
- src/lib/container/container.h
+ src/lib/container/bitarray.h \
+ src/lib/container/bloomfilt.h \
+ src/lib/container/container.h \
+ src/lib/container/map.h \
+ src/lib/container/order.h \
+ src/lib/container/smartlist.h
diff --git a/src/lib/container/map.c b/src/lib/container/map.c
new file mode 100644
index 000000000..227fb8f5e
--- /dev/null
+++ b/src/lib/container/map.c
@@ -0,0 +1,413 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file container.c
+ * \brief Implements a smartlist (a resizable array) along
+ * with helper functions to use smartlists. Also includes
+ * hash table implementations of a string-to-void* map, and of
+ * a digest-to-void* map.
+ **/
+
+#include "lib/container/map.h"
+#include "lib/ctime/di_ops.h"
+#include "lib/crypt_ops/crypto_digest.h"
+
+#include "common/util_bug.h"
+#include "common/util.h" // For strlower
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "ht.h"
+
+/** Helper: Declare an entry type and a map type to implement a mapping using
+ * ht.h. The map type will be called <b>maptype</b>. The key part of each
+ * entry is declared using the C declaration <b>keydecl</b>. All functions
+ * and types associated with the map get prefixed with <b>prefix</b> */
+#define DEFINE_MAP_STRUCTS(maptype, keydecl, prefix) \
+ typedef struct prefix ## entry_t { \
+ HT_ENTRY(prefix ## entry_t) node; \
+ void *val; \
+ keydecl; \
+ } prefix ## entry_t; \
+ struct maptype { \
+ HT_HEAD(prefix ## impl, prefix ## entry_t) head; \
+ }
+
+DEFINE_MAP_STRUCTS(strmap_t, char *key, strmap_);
+DEFINE_MAP_STRUCTS(digestmap_t, char key[DIGEST_LEN], digestmap_);
+DEFINE_MAP_STRUCTS(digest256map_t, uint8_t key[DIGEST256_LEN], digest256map_);
+
+/** Helper: compare strmap_entry_t objects by key value. */
+static inline int
+strmap_entries_eq(const strmap_entry_t *a, const strmap_entry_t *b)
+{
+ return !strcmp(a->key, b->key);
+}
+
+/** Helper: return a hash value for a strmap_entry_t. */
+static inline unsigned int
+strmap_entry_hash(const strmap_entry_t *a)
+{
+ return (unsigned) siphash24g(a->key, strlen(a->key));
+}
+
+/** Helper: compare digestmap_entry_t objects by key value. */
+static inline int
+digestmap_entries_eq(const digestmap_entry_t *a, const digestmap_entry_t *b)
+{
+ return tor_memeq(a->key, b->key, DIGEST_LEN);
+}
+
+/** Helper: return a hash value for a digest_map_t. */
+static inline unsigned int
+digestmap_entry_hash(const digestmap_entry_t *a)
+{
+ return (unsigned) siphash24g(a->key, DIGEST_LEN);
+}
+
+/** Helper: compare digestmap_entry_t objects by key value. */
+static inline int
+digest256map_entries_eq(const digest256map_entry_t *a,
+ const digest256map_entry_t *b)
+{
+ return tor_memeq(a->key, b->key, DIGEST256_LEN);
+}
+
+/** Helper: return a hash value for a digest_map_t. */
+static inline unsigned int
+digest256map_entry_hash(const digest256map_entry_t *a)
+{
+ return (unsigned) siphash24g(a->key, DIGEST256_LEN);
+}
+
+HT_PROTOTYPE(strmap_impl, strmap_entry_t, node, strmap_entry_hash,
+ strmap_entries_eq)
+HT_GENERATE2(strmap_impl, strmap_entry_t, node, strmap_entry_hash,
+ strmap_entries_eq, 0.6, tor_reallocarray_, tor_free_)
+
+HT_PROTOTYPE(digestmap_impl, digestmap_entry_t, node, digestmap_entry_hash,
+ digestmap_entries_eq)
+HT_GENERATE2(digestmap_impl, digestmap_entry_t, node, digestmap_entry_hash,
+ digestmap_entries_eq, 0.6, tor_reallocarray_, tor_free_)
+
+HT_PROTOTYPE(digest256map_impl, digest256map_entry_t, node,
+ digest256map_entry_hash,
+ digest256map_entries_eq)
+HT_GENERATE2(digest256map_impl, digest256map_entry_t, node,
+ digest256map_entry_hash,
+ digest256map_entries_eq, 0.6, tor_reallocarray_, tor_free_)
+
+#define strmap_entry_free(ent) \
+ FREE_AND_NULL(strmap_entry_t, strmap_entry_free_, (ent))
+#define digestmap_entry_free(ent) \
+ FREE_AND_NULL(digestmap_entry_t, digestmap_entry_free_, (ent))
+#define digest256map_entry_free(ent) \
+ FREE_AND_NULL(digest256map_entry_t, digest256map_entry_free_, (ent))
+
+static inline void
+strmap_entry_free_(strmap_entry_t *ent)
+{
+ tor_free(ent->key);
+ tor_free(ent);
+}
+static inline void
+digestmap_entry_free_(digestmap_entry_t *ent)
+{
+ tor_free(ent);
+}
+static inline void
+digest256map_entry_free_(digest256map_entry_t *ent)
+{
+ tor_free(ent);
+}
+
+static inline void
+strmap_assign_tmp_key(strmap_entry_t *ent, const char *key)
+{
+ ent->key = (char*)key;
+}
+static inline void
+digestmap_assign_tmp_key(digestmap_entry_t *ent, const char *key)
+{
+ memcpy(ent->key, key, DIGEST_LEN);
+}
+static inline void
+digest256map_assign_tmp_key(digest256map_entry_t *ent, const uint8_t *key)
+{
+ memcpy(ent->key, key, DIGEST256_LEN);
+}
+static inline void
+strmap_assign_key(strmap_entry_t *ent, const char *key)
+{
+ ent->key = tor_strdup(key);
+}
+static inline void
+digestmap_assign_key(digestmap_entry_t *ent, const char *key)
+{
+ memcpy(ent->key, key, DIGEST_LEN);
+}
+static inline void
+digest256map_assign_key(digest256map_entry_t *ent, const uint8_t *key)
+{
+ memcpy(ent->key, key, DIGEST256_LEN);
+}
+
+/**
+ * Macro: implement all the functions for a map that are declared in
+ * container.h by the DECLARE_MAP_FNS() macro. You must additionally define a
+ * prefix_entry_free_() function to free entries (and their keys), a
+ * prefix_assign_tmp_key() function to temporarily set a stack-allocated
+ * entry to hold a key, and a prefix_assign_key() function to set a
+ * heap-allocated entry to hold a key.
+ */
+#define IMPLEMENT_MAP_FNS(maptype, keytype, prefix) \
+ /** Create and return a new empty map. */ \
+ MOCK_IMPL(maptype *, \
+ prefix##_new,(void)) \
+ { \
+ maptype *result; \
+ result = tor_malloc(sizeof(maptype)); \
+ HT_INIT(prefix##_impl, &result->head); \
+ return result; \
+ } \
+ \
+ /** Return the item from <b>map</b> whose key matches <b>key</b>, or \
+ * NULL if no such value exists. */ \
+ void * \
+ prefix##_get(const maptype *map, const keytype key) \
+ { \
+ prefix ##_entry_t *resolve; \
+ prefix ##_entry_t search; \
+ tor_assert(map); \
+ tor_assert(key); \
+ prefix ##_assign_tmp_key(&search, key); \
+ resolve = HT_FIND(prefix ##_impl, &map->head, &search); \
+ if (resolve) { \
+ return resolve->val; \
+ } else { \
+ return NULL; \
+ } \
+ } \
+ \
+ /** Add an entry to <b>map</b> mapping <b>key</b> to <b>val</b>; \
+ * return the previous value, or NULL if no such value existed. */ \
+ void * \
+ prefix##_set(maptype *map, const keytype key, void *val) \
+ { \
+ prefix##_entry_t search; \
+ void *oldval; \
+ tor_assert(map); \
+ tor_assert(key); \
+ tor_assert(val); \
+ prefix##_assign_tmp_key(&search, key); \
+ /* We a lot of our time in this function, so the code below is */ \
+ /* meant to optimize the check/alloc/set cycle by avoiding the two */\
+ /* trips to the hash table that we would do in the unoptimized */ \
+ /* version of this code. (Each of HT_INSERT and HT_FIND calls */ \
+ /* HT_SET_HASH and HT_FIND_P.) */ \
+ HT_FIND_OR_INSERT_(prefix##_impl, node, prefix##_entry_hash, \
+ &(map->head), \
+ prefix##_entry_t, &search, ptr, \
+ { \
+ /* we found an entry. */ \
+ oldval = (*ptr)->val; \
+ (*ptr)->val = val; \
+ return oldval; \
+ }, \
+ { \
+ /* We didn't find the entry. */ \
+ prefix##_entry_t *newent = \
+ tor_malloc_zero(sizeof(prefix##_entry_t)); \
+ prefix##_assign_key(newent, key); \
+ newent->val = val; \
+ HT_FOI_INSERT_(node, &(map->head), \
+ &search, newent, ptr); \
+ return NULL; \
+ }); \
+ } \
+ \
+ /** Remove the value currently associated with <b>key</b> from the map. \
+ * Return the value if one was set, or NULL if there was no entry for \
+ * <b>key</b>. \
+ * \
+ * Note: you must free any storage associated with the returned value. \
+ */ \
+ void * \
+ prefix##_remove(maptype *map, const keytype key) \
+ { \
+ prefix##_entry_t *resolve; \
+ prefix##_entry_t search; \
+ void *oldval; \
+ tor_assert(map); \
+ tor_assert(key); \
+ prefix##_assign_tmp_key(&search, key); \
+ resolve = HT_REMOVE(prefix##_impl, &map->head, &search); \
+ if (resolve) { \
+ oldval = resolve->val; \
+ prefix##_entry_free(resolve); \
+ return oldval; \
+ } else { \
+ return NULL; \
+ } \
+ } \
+ \
+ /** Return the number of elements in <b>map</b>. */ \
+ int \
+ prefix##_size(const maptype *map) \
+ { \
+ return HT_SIZE(&map->head); \
+ } \
+ \
+ /** Return true iff <b>map</b> has no entries. */ \
+ int \
+ prefix##_isempty(const maptype *map) \
+ { \
+ return HT_EMPTY(&map->head); \
+ } \
+ \
+ /** Assert that <b>map</b> is not corrupt. */ \
+ void \
+ prefix##_assert_ok(const maptype *map) \
+ { \
+ tor_assert(!prefix##_impl_HT_REP_IS_BAD_(&map->head)); \
+ } \
+ \
+ /** Remove all entries from <b>map</b>, and deallocate storage for \
+ * those entries. If free_val is provided, invoked it every value in \
+ * <b>map</b>. */ \
+ MOCK_IMPL(void, \
+ prefix##_free_, (maptype *map, void (*free_val)(void*))) \
+ { \
+ prefix##_entry_t **ent, **next, *this; \
+ if (!map) \
+ return; \
+ for (ent = HT_START(prefix##_impl, &map->head); ent != NULL; \
+ ent = next) { \
+ this = *ent; \
+ next = HT_NEXT_RMV(prefix##_impl, &map->head, ent); \
+ if (free_val) \
+ free_val(this->val); \
+ prefix##_entry_free(this); \
+ } \
+ tor_assert(HT_EMPTY(&map->head)); \
+ HT_CLEAR(prefix##_impl, &map->head); \
+ tor_free(map); \
+ } \
+ \
+ /** return an <b>iterator</b> pointer to the front of a map. \
+ * \
+ * Iterator example: \
+ * \
+ * \code \
+ * // uppercase values in "map", removing empty values. \
+ * \
+ * strmap_iter_t *iter; \
+ * const char *key; \
+ * void *val; \
+ * char *cp; \
+ * \
+ * for (iter = strmap_iter_init(map); !strmap_iter_done(iter); ) { \
+ * strmap_iter_get(iter, &key, &val); \
+ * cp = (char*)val; \
+ * if (!*cp) { \
+ * iter = strmap_iter_next_rmv(map,iter); \
+ * free(val); \
+ * } else { \
+ * for (;*cp;cp++) *cp = TOR_TOUPPER(*cp); \
+ */ \
+ prefix##_iter_t * \
+ prefix##_iter_init(maptype *map) \
+ { \
+ tor_assert(map); \
+ return HT_START(prefix##_impl, &map->head); \
+ } \
+ \
+ /** Advance <b>iter</b> a single step to the next entry, and return \
+ * its new value. */ \
+ prefix##_iter_t * \
+ prefix##_iter_next(maptype *map, prefix##_iter_t *iter) \
+ { \
+ tor_assert(map); \
+ tor_assert(iter); \
+ return HT_NEXT(prefix##_impl, &map->head, iter); \
+ } \
+ /** Advance <b>iter</b> a single step to the next entry, removing the \
+ * current entry, and return its new value. */ \
+ prefix##_iter_t * \
+ prefix##_iter_next_rmv(maptype *map, prefix##_iter_t *iter) \
+ { \
+ prefix##_entry_t *rmv; \
+ tor_assert(map); \
+ tor_assert(iter); \
+ tor_assert(*iter); \
+ rmv = *iter; \
+ iter = HT_NEXT_RMV(prefix##_impl, &map->head, iter); \
+ prefix##_entry_free(rmv); \
+ return iter; \
+ } \
+ /** Set *<b>keyp</b> and *<b>valp</b> to the current entry pointed \
+ * to by iter. */ \
+ void \
+ prefix##_iter_get(prefix##_iter_t *iter, const keytype *keyp, \
+ void **valp) \
+ { \
+ tor_assert(iter); \
+ tor_assert(*iter); \
+ tor_assert(keyp); \
+ tor_assert(valp); \
+ *keyp = (*iter)->key; \
+ *valp = (*iter)->val; \
+ } \
+ /** Return true iff <b>iter</b> has advanced past the last entry of \
+ * <b>map</b>. */ \
+ int \
+ prefix##_iter_done(prefix##_iter_t *iter) \
+ { \
+ return iter == NULL; \
+ }
+
+IMPLEMENT_MAP_FNS(strmap_t, char *, strmap)
+IMPLEMENT_MAP_FNS(digestmap_t, char *, digestmap)
+IMPLEMENT_MAP_FNS(digest256map_t, uint8_t *, digest256map)
+
+/** Same as strmap_set, but first converts <b>key</b> to lowercase. */
+void *
+strmap_set_lc(strmap_t *map, const char *key, void *val)
+{
+ /* We could be a little faster by using strcasecmp instead, and a separate
+ * type, but I don't think it matters. */
+ void *v;
+ char *lc_key = tor_strdup(key);
+ tor_strlower(lc_key);
+ v = strmap_set(map,lc_key,val);
+ tor_free(lc_key);
+ return v;
+}
+
+/** Same as strmap_get, but first converts <b>key</b> to lowercase. */
+void *
+strmap_get_lc(const strmap_t *map, const char *key)
+{
+ void *v;
+ char *lc_key = tor_strdup(key);
+ tor_strlower(lc_key);
+ v = strmap_get(map,lc_key);
+ tor_free(lc_key);
+ return v;
+}
+
+/** Same as strmap_remove, but first converts <b>key</b> to lowercase */
+void *
+strmap_remove_lc(strmap_t *map, const char *key)
+{
+ void *v;
+ char *lc_key = tor_strdup(key);
+ tor_strlower(lc_key);
+ v = strmap_remove(map,lc_key);
+ tor_free(lc_key);
+ return v;
+}
diff --git a/src/lib/container/map.h b/src/lib/container/map.h
new file mode 100644
index 000000000..ac21c2871
--- /dev/null
+++ b/src/lib/container/map.h
@@ -0,0 +1,255 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_MAP_H
+#define TOR_MAP_H
+
+#include "lib/testsupport/testsupport.h"
+#include "lib/cc/torint.h"
+
+#include "siphash.h"
+
+#define DECLARE_MAP_FNS(maptype, keytype, prefix) \
+ typedef struct maptype maptype; \
+ typedef struct prefix##entry_t *prefix##iter_t; \
+ MOCK_DECL(maptype*, prefix##new, (void)); \
+ void* prefix##set(maptype *map, keytype key, void *val); \
+ void* prefix##get(const maptype *map, keytype key); \
+ void* prefix##remove(maptype *map, keytype key); \
+ MOCK_DECL(void, prefix##free_, (maptype *map, void (*free_val)(void*))); \
+ int prefix##isempty(const maptype *map); \
+ int prefix##size(const maptype *map); \
+ prefix##iter_t *prefix##iter_init(maptype *map); \
+ prefix##iter_t *prefix##iter_next(maptype *map, prefix##iter_t *iter); \
+ prefix##iter_t *prefix##iter_next_rmv(maptype *map, prefix##iter_t *iter); \
+ void prefix##iter_get(prefix##iter_t *iter, keytype *keyp, void **valp); \
+ int prefix##iter_done(prefix##iter_t *iter); \
+ void prefix##assert_ok(const maptype *map)
+
+/* Map from const char * to void *. Implemented with a hash table. */
+DECLARE_MAP_FNS(strmap_t, const char *, strmap_);
+/* Map from const char[DIGEST_LEN] to void *. Implemented with a hash table. */
+DECLARE_MAP_FNS(digestmap_t, const char *, digestmap_);
+/* Map from const uint8_t[DIGEST256_LEN] to void *. Implemented with a hash
+ * table. */
+DECLARE_MAP_FNS(digest256map_t, const uint8_t *, digest256map_);
+
+#define MAP_FREE_AND_NULL(maptype, map, fn) \
+ do { \
+ maptype ## _free_((map), (fn)); \
+ (map) = NULL; \
+ } while (0)
+
+#define strmap_free(map, fn) MAP_FREE_AND_NULL(strmap, (map), (fn))
+#define digestmap_free(map, fn) MAP_FREE_AND_NULL(digestmap, (map), (fn))
+#define digest256map_free(map, fn) MAP_FREE_AND_NULL(digest256map, (map), (fn))
+
+#undef DECLARE_MAP_FNS
+
+/** Iterates over the key-value pairs in a map <b>map</b> in order.
+ * <b>prefix</b> is as for DECLARE_MAP_FNS (i.e., strmap_ or digestmap_).
+ * The map's keys and values are of type keytype and valtype respectively;
+ * each iteration assigns them to keyvar and valvar.
+ *
+ * Example use:
+ * MAP_FOREACH(digestmap_, m, const char *, k, routerinfo_t *, r) {
+ * // use k and r
+ * } MAP_FOREACH_END.
+ */
+/* Unpacks to, approximately:
+ * {
+ * digestmap_iter_t *k_iter;
+ * for (k_iter = digestmap_iter_init(m); !digestmap_iter_done(k_iter);
+ * k_iter = digestmap_iter_next(m, k_iter)) {
+ * const char *k;
+ * void *r_voidp;
+ * routerinfo_t *r;
+ * digestmap_iter_get(k_iter, &k, &r_voidp);
+ * r = r_voidp;
+ * // use k and r
+ * }
+ * }
+ */
+#define MAP_FOREACH(prefix, map, keytype, keyvar, valtype, valvar) \
+ STMT_BEGIN \
+ prefix##iter_t *keyvar##_iter; \
+ for (keyvar##_iter = prefix##iter_init(map); \
+ !prefix##iter_done(keyvar##_iter); \
+ keyvar##_iter = prefix##iter_next(map, keyvar##_iter)) { \
+ keytype keyvar; \
+ void *valvar##_voidp; \
+ valtype valvar; \
+ prefix##iter_get(keyvar##_iter, &keyvar, &valvar##_voidp); \
+ valvar = valvar##_voidp;
+
+/** As MAP_FOREACH, except allows members to be removed from the map
+ * during the iteration via MAP_DEL_CURRENT. Example use:
+ *
+ * Example use:
+ * MAP_FOREACH(digestmap_, m, const char *, k, routerinfo_t *, r) {
+ * if (is_very_old(r))
+ * MAP_DEL_CURRENT(k);
+ * } MAP_FOREACH_END.
+ **/
+/* Unpacks to, approximately:
+ * {
+ * digestmap_iter_t *k_iter;
+ * int k_del=0;
+ * for (k_iter = digestmap_iter_init(m); !digestmap_iter_done(k_iter);
+ * k_iter = k_del ? digestmap_iter_next(m, k_iter)
+ * : digestmap_iter_next_rmv(m, k_iter)) {
+ * const char *k;
+ * void *r_voidp;
+ * routerinfo_t *r;
+ * k_del=0;
+ * digestmap_iter_get(k_iter, &k, &r_voidp);
+ * r = r_voidp;
+ * if (is_very_old(r)) {
+ * k_del = 1;
+ * }
+ * }
+ * }
+ */
+#define MAP_FOREACH_MODIFY(prefix, map, keytype, keyvar, valtype, valvar) \
+ STMT_BEGIN \
+ prefix##iter_t *keyvar##_iter; \
+ int keyvar##_del=0; \
+ for (keyvar##_iter = prefix##iter_init(map); \
+ !prefix##iter_done(keyvar##_iter); \
+ keyvar##_iter = keyvar##_del ? \
+ prefix##iter_next_rmv(map, keyvar##_iter) : \
+ prefix##iter_next(map, keyvar##_iter)) { \
+ keytype keyvar; \
+ void *valvar##_voidp; \
+ valtype valvar; \
+ keyvar##_del=0; \
+ prefix##iter_get(keyvar##_iter, &keyvar, &valvar##_voidp); \
+ valvar = valvar##_voidp;
+
+/** Used with MAP_FOREACH_MODIFY to remove the currently-iterated-upon
+ * member of the map. */
+#define MAP_DEL_CURRENT(keyvar) \
+ STMT_BEGIN \
+ keyvar##_del = 1; \
+ STMT_END
+
+/** Used to end a MAP_FOREACH() block. */
+#define MAP_FOREACH_END } STMT_END ;
+
+/** As MAP_FOREACH, but does not require declaration of prefix or keytype.
+ * Example use:
+ * DIGESTMAP_FOREACH(m, k, routerinfo_t *, r) {
+ * // use k and r
+ * } DIGESTMAP_FOREACH_END.
+ */
+#define DIGESTMAP_FOREACH(map, keyvar, valtype, valvar) \
+ MAP_FOREACH(digestmap_, map, const char *, keyvar, valtype, valvar)
+
+/** As MAP_FOREACH_MODIFY, but does not require declaration of prefix or
+ * keytype.
+ * Example use:
+ * DIGESTMAP_FOREACH_MODIFY(m, k, routerinfo_t *, r) {
+ * if (is_very_old(r))
+ * MAP_DEL_CURRENT(k);
+ * } DIGESTMAP_FOREACH_END.
+ */
+#define DIGESTMAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
+ MAP_FOREACH_MODIFY(digestmap_, map, const char *, keyvar, valtype, valvar)
+/** Used to end a DIGESTMAP_FOREACH() block. */
+#define DIGESTMAP_FOREACH_END MAP_FOREACH_END
+
+#define DIGEST256MAP_FOREACH(map, keyvar, valtype, valvar) \
+ MAP_FOREACH(digest256map_, map, const uint8_t *, keyvar, valtype, valvar)
+#define DIGEST256MAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
+ MAP_FOREACH_MODIFY(digest256map_, map, const uint8_t *, \
+ keyvar, valtype, valvar)
+#define DIGEST256MAP_FOREACH_END MAP_FOREACH_END
+
+#define STRMAP_FOREACH(map, keyvar, valtype, valvar) \
+ MAP_FOREACH(strmap_, map, const char *, keyvar, valtype, valvar)
+#define STRMAP_FOREACH_MODIFY(map, keyvar, valtype, valvar) \
+ MAP_FOREACH_MODIFY(strmap_, map, const char *, keyvar, valtype, valvar)
+#define STRMAP_FOREACH_END MAP_FOREACH_END
+
+void* strmap_set_lc(strmap_t *map, const char *key, void *val);
+void* strmap_get_lc(const strmap_t *map, const char *key);
+void* strmap_remove_lc(strmap_t *map, const char *key);
+
+#define DECLARE_TYPED_DIGESTMAP_FNS(prefix, maptype, valtype) \
+ typedef struct maptype maptype; \
+ typedef struct prefix##iter_t *prefix##iter_t; \
+ ATTR_UNUSED static inline maptype* \
+ prefix##new(void) \
+ { \
+ return (maptype*)digestmap_new(); \
+ } \
+ ATTR_UNUSED static inline digestmap_t* \
+ prefix##to_digestmap(maptype *map) \
+ { \
+ return (digestmap_t*)map; \
+ } \
+ ATTR_UNUSED static inline valtype* \
+ prefix##get(maptype *map, const char *key) \
+ { \
+ return (valtype*)digestmap_get((digestmap_t*)map, key); \
+ } \
+ ATTR_UNUSED static inline valtype* \
+ prefix##set(maptype *map, const char *key, valtype *val) \
+ { \
+ return (valtype*)digestmap_set((digestmap_t*)map, key, val); \
+ } \
+ ATTR_UNUSED static inline valtype* \
+ prefix##remove(maptype *map, const char *key) \
+ { \
+ return (valtype*)digestmap_remove((digestmap_t*)map, key); \
+ } \
+ ATTR_UNUSED static inline void \
+ prefix##f##ree_(maptype *map, void (*free_val)(void*)) \
+ { \
+ digestmap_free_((digestmap_t*)map, free_val); \
+ } \
+ ATTR_UNUSED static inline int \
+ prefix##isempty(maptype *map) \
+ { \
+ return digestmap_isempty((digestmap_t*)map); \
+ } \
+ ATTR_UNUSED static inline int \
+ prefix##size(maptype *map) \
+ { \
+ return digestmap_size((digestmap_t*)map); \
+ } \
+ ATTR_UNUSED static inline \
+ prefix##iter_t *prefix##iter_init(maptype *map) \
+ { \
+ return (prefix##iter_t*) digestmap_iter_init((digestmap_t*)map); \
+ } \
+ ATTR_UNUSED static inline \
+ prefix##iter_t *prefix##iter_next(maptype *map, prefix##iter_t *iter) \
+ { \
+ return (prefix##iter_t*) digestmap_iter_next( \
+ (digestmap_t*)map, (digestmap_iter_t*)iter); \
+ } \
+ ATTR_UNUSED static inline prefix##iter_t* \
+ prefix##iter_next_rmv(maptype *map, prefix##iter_t *iter) \
+ { \
+ return (prefix##iter_t*) digestmap_iter_next_rmv( \
+ (digestmap_t*)map, (digestmap_iter_t*)iter); \
+ } \
+ ATTR_UNUSED static inline void \
+ prefix##iter_get(prefix##iter_t *iter, \
+ const char **keyp, \
+ valtype **valp) \
+ { \
+ void *v; \
+ digestmap_iter_get((digestmap_iter_t*) iter, keyp, &v); \
+ *valp = v; \
+ } \
+ ATTR_UNUSED static inline int \
+ prefix##iter_done(prefix##iter_t *iter) \
+ { \
+ return digestmap_iter_done((digestmap_iter_t*)iter); \
+ }
+
+#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/container/order.c b/src/lib/container/order.c
new file mode 100644
index 000000000..599f83300
--- /dev/null
+++ b/src/lib/container/order.c
@@ -0,0 +1,51 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file container.c
+ * \brief Implements a smartlist (a resizable array) along
+ * with helper functions to use smartlists. Also includes
+ * hash table implementations of a string-to-void* map, and of
+ * a digest-to-void* map.
+ **/
+
+#include <stdlib.h>
+
+#include "lib/container/order.h"
+#include "common/util_bug.h"
+
+/** Declare a function called <b>funcname</b> that acts as a find_nth_FOO
+ * function for an array of type <b>elt_t</b>*.
+ *
+ * NOTE: The implementation kind of sucks: It's O(n log n), whereas finding
+ * the kth element of an n-element list can be done in O(n). Then again, this
+ * implementation is not in critical path, and it is obviously correct. */
+#define IMPLEMENT_ORDER_FUNC(funcname, elt_t) \
+ static int \
+ _cmp_ ## elt_t(const void *_a, const void *_b) \
+ { \
+ const elt_t *a = _a, *b = _b; \
+ if (*a<*b) \
+ return -1; \
+ else if (*a>*b) \
+ return 1; \
+ else \
+ return 0; \
+ } \
+ elt_t \
+ funcname(elt_t *array, int n_elements, int nth) \
+ { \
+ tor_assert(nth >= 0); \
+ tor_assert(nth < n_elements); \
+ qsort(array, n_elements, sizeof(elt_t), _cmp_ ##elt_t); \
+ return array[nth]; \
+ }
+
+IMPLEMENT_ORDER_FUNC(find_nth_int, int)
+IMPLEMENT_ORDER_FUNC(find_nth_time, time_t)
+IMPLEMENT_ORDER_FUNC(find_nth_double, double)
+IMPLEMENT_ORDER_FUNC(find_nth_uint32, uint32_t)
+IMPLEMENT_ORDER_FUNC(find_nth_int32, int32_t)
+IMPLEMENT_ORDER_FUNC(find_nth_long, long)
diff --git a/src/lib/container/order.h b/src/lib/container/order.h
new file mode 100644
index 000000000..bd23750d5
--- /dev/null
+++ b/src/lib/container/order.h
@@ -0,0 +1,54 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_ORDER_H
+#define TOR_ORDER_H
+
+#include "lib/cc/compat_compiler.h"
+#include "lib/cc/torint.h"
+
+/* These functions, given an <b>array</b> of <b>n_elements</b>, return the
+ * <b>nth</b> lowest element. <b>nth</b>=0 gives the lowest element;
+ * <b>n_elements</b>-1 gives the highest; and (<b>n_elements</b>-1) / 2 gives
+ * the median. As a side effect, the elements of <b>array</b> are sorted. */
+int find_nth_int(int *array, int n_elements, int nth);
+time_t find_nth_time(time_t *array, int n_elements, int nth);
+double find_nth_double(double *array, int n_elements, int nth);
+int32_t find_nth_int32(int32_t *array, int n_elements, int nth);
+uint32_t find_nth_uint32(uint32_t *array, int n_elements, int nth);
+long find_nth_long(long *array, int n_elements, int nth);
+static inline int
+median_int(int *array, int n_elements)
+{
+ return find_nth_int(array, n_elements, (n_elements-1)/2);
+}
+static inline time_t
+median_time(time_t *array, int n_elements)
+{
+ return find_nth_time(array, n_elements, (n_elements-1)/2);
+}
+static inline double
+median_double(double *array, int n_elements)
+{
+ return find_nth_double(array, n_elements, (n_elements-1)/2);
+}
+static inline uint32_t
+median_uint32(uint32_t *array, int n_elements)
+{
+ return find_nth_uint32(array, n_elements, (n_elements-1)/2);
+}
+static inline int32_t
+median_int32(int32_t *array, int n_elements)
+{
+ return find_nth_int32(array, n_elements, (n_elements-1)/2);
+}
+
+static inline uint32_t
+third_quartile_uint32(uint32_t *array, int n_elements)
+{
+ return find_nth_uint32(array, n_elements, (n_elements*3)/4);
+}
+
+#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/container/container.c b/src/lib/container/smartlist.c
similarity index 56%
rename from src/lib/container/container.c
rename to src/lib/container/smartlist.c
index d31044fe2..6aef72854 100644
--- a/src/lib/container/container.c
+++ b/src/lib/container/smartlist.c
@@ -11,15 +11,15 @@
* a digest-to-void* map.
**/
+#include "lib/malloc/util_malloc.h"
+#include "lib/container/smartlist.h"
#include "common/util.h"
-#include "lib/container/container.h"
#include "lib/crypt_ops/crypto_digest.h"
+#include "lib/ctime/di_ops.h"
#include <stdlib.h>
#include <string.h>
-#include "ht.h"
-
/** All newly allocated smartlists have this capacity. */
#define SMARTLIST_DEFAULT_CAPACITY 16
@@ -1092,458 +1092,3 @@ smartlist_uniq_digests256(smartlist_t *sl)
{
smartlist_uniq(sl, compare_digests256_, tor_free_);
}
-
-/** Helper: Declare an entry type and a map type to implement a mapping using
- * ht.h. The map type will be called <b>maptype</b>. The key part of each
- * entry is declared using the C declaration <b>keydecl</b>. All functions
- * and types associated with the map get prefixed with <b>prefix</b> */
-#define DEFINE_MAP_STRUCTS(maptype, keydecl, prefix) \
- typedef struct prefix ## entry_t { \
- HT_ENTRY(prefix ## entry_t) node; \
- void *val; \
- keydecl; \
- } prefix ## entry_t; \
- struct maptype { \
- HT_HEAD(prefix ## impl, prefix ## entry_t) head; \
- }
-
-DEFINE_MAP_STRUCTS(strmap_t, char *key, strmap_);
-DEFINE_MAP_STRUCTS(digestmap_t, char key[DIGEST_LEN], digestmap_);
-DEFINE_MAP_STRUCTS(digest256map_t, uint8_t key[DIGEST256_LEN], digest256map_);
-
-/** Helper: compare strmap_entry_t objects by key value. */
-static inline int
-strmap_entries_eq(const strmap_entry_t *a, const strmap_entry_t *b)
-{
- return !strcmp(a->key, b->key);
-}
-
-/** Helper: return a hash value for a strmap_entry_t. */
-static inline unsigned int
-strmap_entry_hash(const strmap_entry_t *a)
-{
- return (unsigned) siphash24g(a->key, strlen(a->key));
-}
-
-/** Helper: compare digestmap_entry_t objects by key value. */
-static inline int
-digestmap_entries_eq(const digestmap_entry_t *a, const digestmap_entry_t *b)
-{
- return tor_memeq(a->key, b->key, DIGEST_LEN);
-}
-
-/** Helper: return a hash value for a digest_map_t. */
-static inline unsigned int
-digestmap_entry_hash(const digestmap_entry_t *a)
-{
- return (unsigned) siphash24g(a->key, DIGEST_LEN);
-}
-
-/** Helper: compare digestmap_entry_t objects by key value. */
-static inline int
-digest256map_entries_eq(const digest256map_entry_t *a,
- const digest256map_entry_t *b)
-{
- return tor_memeq(a->key, b->key, DIGEST256_LEN);
-}
-
-/** Helper: return a hash value for a digest_map_t. */
-static inline unsigned int
-digest256map_entry_hash(const digest256map_entry_t *a)
-{
- return (unsigned) siphash24g(a->key, DIGEST256_LEN);
-}
-
-HT_PROTOTYPE(strmap_impl, strmap_entry_t, node, strmap_entry_hash,
- strmap_entries_eq)
-HT_GENERATE2(strmap_impl, strmap_entry_t, node, strmap_entry_hash,
- strmap_entries_eq, 0.6, tor_reallocarray_, tor_free_)
-
-HT_PROTOTYPE(digestmap_impl, digestmap_entry_t, node, digestmap_entry_hash,
- digestmap_entries_eq)
-HT_GENERATE2(digestmap_impl, digestmap_entry_t, node, digestmap_entry_hash,
- digestmap_entries_eq, 0.6, tor_reallocarray_, tor_free_)
-
-HT_PROTOTYPE(digest256map_impl, digest256map_entry_t, node,
- digest256map_entry_hash,
- digest256map_entries_eq)
-HT_GENERATE2(digest256map_impl, digest256map_entry_t, node,
- digest256map_entry_hash,
- digest256map_entries_eq, 0.6, tor_reallocarray_, tor_free_)
-
-#define strmap_entry_free(ent) \
- FREE_AND_NULL(strmap_entry_t, strmap_entry_free_, (ent))
-#define digestmap_entry_free(ent) \
- FREE_AND_NULL(digestmap_entry_t, digestmap_entry_free_, (ent))
-#define digest256map_entry_free(ent) \
- FREE_AND_NULL(digest256map_entry_t, digest256map_entry_free_, (ent))
-
-static inline void
-strmap_entry_free_(strmap_entry_t *ent)
-{
- tor_free(ent->key);
- tor_free(ent);
-}
-static inline void
-digestmap_entry_free_(digestmap_entry_t *ent)
-{
- tor_free(ent);
-}
-static inline void
-digest256map_entry_free_(digest256map_entry_t *ent)
-{
- tor_free(ent);
-}
-
-static inline void
-strmap_assign_tmp_key(strmap_entry_t *ent, const char *key)
-{
- ent->key = (char*)key;
-}
-static inline void
-digestmap_assign_tmp_key(digestmap_entry_t *ent, const char *key)
-{
- memcpy(ent->key, key, DIGEST_LEN);
-}
-static inline void
-digest256map_assign_tmp_key(digest256map_entry_t *ent, const uint8_t *key)
-{
- memcpy(ent->key, key, DIGEST256_LEN);
-}
-static inline void
-strmap_assign_key(strmap_entry_t *ent, const char *key)
-{
- ent->key = tor_strdup(key);
-}
-static inline void
-digestmap_assign_key(digestmap_entry_t *ent, const char *key)
-{
- memcpy(ent->key, key, DIGEST_LEN);
-}
-static inline void
-digest256map_assign_key(digest256map_entry_t *ent, const uint8_t *key)
-{
- memcpy(ent->key, key, DIGEST256_LEN);
-}
-
-/**
- * Macro: implement all the functions for a map that are declared in
- * container.h by the DECLARE_MAP_FNS() macro. You must additionally define a
- * prefix_entry_free_() function to free entries (and their keys), a
- * prefix_assign_tmp_key() function to temporarily set a stack-allocated
- * entry to hold a key, and a prefix_assign_key() function to set a
- * heap-allocated entry to hold a key.
- */
-#define IMPLEMENT_MAP_FNS(maptype, keytype, prefix) \
- /** Create and return a new empty map. */ \
- MOCK_IMPL(maptype *, \
- prefix##_new,(void)) \
- { \
- maptype *result; \
- result = tor_malloc(sizeof(maptype)); \
- HT_INIT(prefix##_impl, &result->head); \
- return result; \
- } \
- \
- /** Return the item from <b>map</b> whose key matches <b>key</b>, or \
- * NULL if no such value exists. */ \
- void * \
- prefix##_get(const maptype *map, const keytype key) \
- { \
- prefix ##_entry_t *resolve; \
- prefix ##_entry_t search; \
- tor_assert(map); \
- tor_assert(key); \
- prefix ##_assign_tmp_key(&search, key); \
- resolve = HT_FIND(prefix ##_impl, &map->head, &search); \
- if (resolve) { \
- return resolve->val; \
- } else { \
- return NULL; \
- } \
- } \
- \
- /** Add an entry to <b>map</b> mapping <b>key</b> to <b>val</b>; \
- * return the previous value, or NULL if no such value existed. */ \
- void * \
- prefix##_set(maptype *map, const keytype key, void *val) \
- { \
- prefix##_entry_t search; \
- void *oldval; \
- tor_assert(map); \
- tor_assert(key); \
- tor_assert(val); \
- prefix##_assign_tmp_key(&search, key); \
- /* We a lot of our time in this function, so the code below is */ \
- /* meant to optimize the check/alloc/set cycle by avoiding the two */\
- /* trips to the hash table that we would do in the unoptimized */ \
- /* version of this code. (Each of HT_INSERT and HT_FIND calls */ \
- /* HT_SET_HASH and HT_FIND_P.) */ \
- HT_FIND_OR_INSERT_(prefix##_impl, node, prefix##_entry_hash, \
- &(map->head), \
- prefix##_entry_t, &search, ptr, \
- { \
- /* we found an entry. */ \
- oldval = (*ptr)->val; \
- (*ptr)->val = val; \
- return oldval; \
- }, \
- { \
- /* We didn't find the entry. */ \
- prefix##_entry_t *newent = \
- tor_malloc_zero(sizeof(prefix##_entry_t)); \
- prefix##_assign_key(newent, key); \
- newent->val = val; \
- HT_FOI_INSERT_(node, &(map->head), \
- &search, newent, ptr); \
- return NULL; \
- }); \
- } \
- \
- /** Remove the value currently associated with <b>key</b> from the map. \
- * Return the value if one was set, or NULL if there was no entry for \
- * <b>key</b>. \
- * \
- * Note: you must free any storage associated with the returned value. \
- */ \
- void * \
- prefix##_remove(maptype *map, const keytype key) \
- { \
- prefix##_entry_t *resolve; \
- prefix##_entry_t search; \
- void *oldval; \
- tor_assert(map); \
- tor_assert(key); \
- prefix##_assign_tmp_key(&search, key); \
- resolve = HT_REMOVE(prefix##_impl, &map->head, &search); \
- if (resolve) { \
- oldval = resolve->val; \
- prefix##_entry_free(resolve); \
- return oldval; \
- } else { \
- return NULL; \
- } \
- } \
- \
- /** Return the number of elements in <b>map</b>. */ \
- int \
- prefix##_size(const maptype *map) \
- { \
- return HT_SIZE(&map->head); \
- } \
- \
- /** Return true iff <b>map</b> has no entries. */ \
- int \
- prefix##_isempty(const maptype *map) \
- { \
- return HT_EMPTY(&map->head); \
- } \
- \
- /** Assert that <b>map</b> is not corrupt. */ \
- void \
- prefix##_assert_ok(const maptype *map) \
- { \
- tor_assert(!prefix##_impl_HT_REP_IS_BAD_(&map->head)); \
- } \
- \
- /** Remove all entries from <b>map</b>, and deallocate storage for \
- * those entries. If free_val is provided, invoked it every value in \
- * <b>map</b>. */ \
- MOCK_IMPL(void, \
- prefix##_free_, (maptype *map, void (*free_val)(void*))) \
- { \
- prefix##_entry_t **ent, **next, *this; \
- if (!map) \
- return; \
- for (ent = HT_START(prefix##_impl, &map->head); ent != NULL; \
- ent = next) { \
- this = *ent; \
- next = HT_NEXT_RMV(prefix##_impl, &map->head, ent); \
- if (free_val) \
- free_val(this->val); \
- prefix##_entry_free(this); \
- } \
- tor_assert(HT_EMPTY(&map->head)); \
- HT_CLEAR(prefix##_impl, &map->head); \
- tor_free(map); \
- } \
- \
- /** return an <b>iterator</b> pointer to the front of a map. \
- * \
- * Iterator example: \
- * \
- * \code \
- * // uppercase values in "map", removing empty values. \
- * \
- * strmap_iter_t *iter; \
- * const char *key; \
- * void *val; \
- * char *cp; \
- * \
- * for (iter = strmap_iter_init(map); !strmap_iter_done(iter); ) { \
- * strmap_iter_get(iter, &key, &val); \
- * cp = (char*)val; \
- * if (!*cp) { \
- * iter = strmap_iter_next_rmv(map,iter); \
- * free(val); \
- * } else { \
- * for (;*cp;cp++) *cp = TOR_TOUPPER(*cp); \
- */ \
- prefix##_iter_t * \
- prefix##_iter_init(maptype *map) \
- { \
- tor_assert(map); \
- return HT_START(prefix##_impl, &map->head); \
- } \
- \
- /** Advance <b>iter</b> a single step to the next entry, and return \
- * its new value. */ \
- prefix##_iter_t * \
- prefix##_iter_next(maptype *map, prefix##_iter_t *iter) \
- { \
- tor_assert(map); \
- tor_assert(iter); \
- return HT_NEXT(prefix##_impl, &map->head, iter); \
- } \
- /** Advance <b>iter</b> a single step to the next entry, removing the \
- * current entry, and return its new value. */ \
- prefix##_iter_t * \
- prefix##_iter_next_rmv(maptype *map, prefix##_iter_t *iter) \
- { \
- prefix##_entry_t *rmv; \
- tor_assert(map); \
- tor_assert(iter); \
- tor_assert(*iter); \
- rmv = *iter; \
- iter = HT_NEXT_RMV(prefix##_impl, &map->head, iter); \
- prefix##_entry_free(rmv); \
- return iter; \
- } \
- /** Set *<b>keyp</b> and *<b>valp</b> to the current entry pointed \
- * to by iter. */ \
- void \
- prefix##_iter_get(prefix##_iter_t *iter, const keytype *keyp, \
- void **valp) \
- { \
- tor_assert(iter); \
- tor_assert(*iter); \
- tor_assert(keyp); \
- tor_assert(valp); \
- *keyp = (*iter)->key; \
- *valp = (*iter)->val; \
- } \
- /** Return true iff <b>iter</b> has advanced past the last entry of \
- * <b>map</b>. */ \
- int \
- prefix##_iter_done(prefix##_iter_t *iter) \
- { \
- return iter == NULL; \
- }
-
-IMPLEMENT_MAP_FNS(strmap_t, char *, strmap)
-IMPLEMENT_MAP_FNS(digestmap_t, char *, digestmap)
-IMPLEMENT_MAP_FNS(digest256map_t, uint8_t *, digest256map)
-
-/** Same as strmap_set, but first converts <b>key</b> to lowercase. */
-void *
-strmap_set_lc(strmap_t *map, const char *key, void *val)
-{
- /* We could be a little faster by using strcasecmp instead, and a separate
- * type, but I don't think it matters. */
- void *v;
- char *lc_key = tor_strdup(key);
- tor_strlower(lc_key);
- v = strmap_set(map,lc_key,val);
- tor_free(lc_key);
- return v;
-}
-
-/** Same as strmap_get, but first converts <b>key</b> to lowercase. */
-void *
-strmap_get_lc(const strmap_t *map, const char *key)
-{
- void *v;
- char *lc_key = tor_strdup(key);
- tor_strlower(lc_key);
- v = strmap_get(map,lc_key);
- tor_free(lc_key);
- return v;
-}
-
-/** Same as strmap_remove, but first converts <b>key</b> to lowercase */
-void *
-strmap_remove_lc(strmap_t *map, const char *key)
-{
- void *v;
- char *lc_key = tor_strdup(key);
- tor_strlower(lc_key);
- v = strmap_remove(map,lc_key);
- tor_free(lc_key);
- return v;
-}
-
-/** Declare a function called <b>funcname</b> that acts as a find_nth_FOO
- * function for an array of type <b>elt_t</b>*.
- *
- * NOTE: The implementation kind of sucks: It's O(n log n), whereas finding
- * the kth element of an n-element list can be done in O(n). Then again, this
- * implementation is not in critical path, and it is obviously correct. */
-#define IMPLEMENT_ORDER_FUNC(funcname, elt_t) \
- static int \
- _cmp_ ## elt_t(const void *_a, const void *_b) \
- { \
- const elt_t *a = _a, *b = _b; \
- if (*a<*b) \
- return -1; \
- else if (*a>*b) \
- return 1; \
- else \
- return 0; \
- } \
- elt_t \
- funcname(elt_t *array, int n_elements, int nth) \
- { \
- tor_assert(nth >= 0); \
- tor_assert(nth < n_elements); \
- qsort(array, n_elements, sizeof(elt_t), _cmp_ ##elt_t); \
- return array[nth]; \
- }
-
-IMPLEMENT_ORDER_FUNC(find_nth_int, int)
-IMPLEMENT_ORDER_FUNC(find_nth_time, time_t)
-IMPLEMENT_ORDER_FUNC(find_nth_double, double)
-IMPLEMENT_ORDER_FUNC(find_nth_uint32, uint32_t)
-IMPLEMENT_ORDER_FUNC(find_nth_int32, int32_t)
-IMPLEMENT_ORDER_FUNC(find_nth_long, long)
-
-/** Return a newly allocated digestset_t, optimized to hold a total of
- * <b>max_elements</b> digests with a reasonably low false positive weight. */
-digestset_t *
-digestset_new(int max_elements)
-{
- /* The probability of false positives is about P=(1 - exp(-kn/m))^k, where k
- * is the number of hash functions per entry, m is the bits in the array,
- * and n is the number of elements inserted. For us, k==4, n<=max_elements,
- * and m==n_bits= approximately max_elements*32. This gives
- * P<(1-exp(-4*n/(32*n)))^4 == (1-exp(1/-8))^4 == .00019
- *
- * It would be more optimal in space vs false positives to get this false
- * positive rate by going for k==13, and m==18.5n, but we also want to
- * conserve CPU, and k==13 is pretty big.
- */
- int n_bits = 1u << (tor_log2(max_elements)+5);
- digestset_t *r = tor_malloc(sizeof(digestset_t));
- r->mask = n_bits - 1;
- r->ba = bitarray_init_zero(n_bits);
- return r;
-}
-
-/** Free all storage held in <b>set</b>. */
-void
-digestset_free_(digestset_t *set)
-{
- if (!set)
- return;
- bitarray_free(set->ba);
- tor_free(set);
-}
diff --git a/src/lib/container/smartlist.h b/src/lib/container/smartlist.h
new file mode 100644
index 000000000..7b80a9fed
--- /dev/null
+++ b/src/lib/container/smartlist.h
@@ -0,0 +1,351 @@
+/* Copyright (c) 2003-2004, Roger Dingledine
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_SMARTLIST_H
+#define TOR_SMARTLIST_H
+
+#include <stddef.h>
+#include "lib/cc/compat_compiler.h"
+#include "common/util_bug.h"
+#include "lib/testsupport/testsupport.h"
+
+/** A resizeable list of pointers, with associated helpful functionality.
+ *
+ * The members of this struct are exposed only so that macros and inlines can
+ * use them; all access to smartlist internals should go through the functions
+ * and macros defined here.
+ **/
+typedef struct smartlist_t {
+ /** @{ */
+ /** <b>list</b> has enough capacity to store exactly <b>capacity</b> elements
+ * before it needs to be resized. Only the first <b>num_used</b> (\<=
+ * capacity) elements point to valid data.
+ */
+ void **list;
+ int num_used;
+ int capacity;
+ /** @} */
+} smartlist_t;
+
+MOCK_DECL(smartlist_t *, smartlist_new, (void));
+MOCK_DECL(void, smartlist_free_, (smartlist_t *sl));
+#define smartlist_free(sl) FREE_AND_NULL(smartlist_t, smartlist_free_, (sl))
+
+void smartlist_clear(smartlist_t *sl);
+void smartlist_add(smartlist_t *sl, void *element);
+void smartlist_add_all(smartlist_t *sl, const smartlist_t *s2);
+void smartlist_add_strdup(struct smartlist_t *sl, const char *string);
+void smartlist_remove(smartlist_t *sl, const void *element);
+void smartlist_remove_keeporder(smartlist_t *sl, const void *element);
+void *smartlist_pop_last(smartlist_t *sl);
+void smartlist_reverse(smartlist_t *sl);
+void smartlist_string_remove(smartlist_t *sl, const char *element);
+int smartlist_contains(const smartlist_t *sl, const void *element);
+int smartlist_contains_string(const smartlist_t *sl, const char *element);
+int smartlist_pos(const smartlist_t *sl, const void *element);
+int smartlist_string_pos(const smartlist_t *, const char *elt);
+int smartlist_contains_string_case(const smartlist_t *sl, const char *element);
+int smartlist_contains_int_as_string(const smartlist_t *sl, int num);
+int smartlist_strings_eq(const smartlist_t *sl1, const smartlist_t *sl2);
+int smartlist_contains_digest(const smartlist_t *sl, const char *element);
+int smartlist_ints_eq(const smartlist_t *sl1, const smartlist_t *sl2);
+int smartlist_overlap(const smartlist_t *sl1, const smartlist_t *sl2);
+void smartlist_intersect(smartlist_t *sl1, const smartlist_t *sl2);
+void smartlist_subtract(smartlist_t *sl1, const smartlist_t *sl2);
+
+/* smartlist_choose() is defined in crypto.[ch] */
+#ifdef DEBUG_SMARTLIST
+/** Return the number of items in sl.
+ */
+static inline int smartlist_len(const smartlist_t *sl);
+static inline int smartlist_len(const smartlist_t *sl) {
+ tor_assert(sl);
+ return (sl)->num_used;
+}
+/** Return the <b>idx</b>th element of sl.
+ */
+static inline void *smartlist_get(const smartlist_t *sl, int idx);
+static inline void *smartlist_get(const smartlist_t *sl, int idx) {
+ tor_assert(sl);
+ tor_assert(idx>=0);
+ tor_assert(sl->num_used > idx);
+ return sl->list[idx];
+}
+static inline void smartlist_set(smartlist_t *sl, int idx, void *val) {
+ tor_assert(sl);
+ tor_assert(idx>=0);
+ tor_assert(sl->num_used > idx);
+ sl->list[idx] = val;
+}
+#else /* !(defined(DEBUG_SMARTLIST)) */
+#define smartlist_len(sl) ((sl)->num_used)
+#define smartlist_get(sl, idx) ((sl)->list[idx])
+#define smartlist_set(sl, idx, val) ((sl)->list[idx] = (val))
+#endif /* defined(DEBUG_SMARTLIST) */
+
+/** Exchange the elements at indices <b>idx1</b> and <b>idx2</b> of the
+ * smartlist <b>sl</b>. */
+static inline void smartlist_swap(smartlist_t *sl, int idx1, int idx2)
+{
+ if (idx1 != idx2) {
+ void *elt = smartlist_get(sl, idx1);
+ smartlist_set(sl, idx1, smartlist_get(sl, idx2));
+ smartlist_set(sl, idx2, elt);
+ }
+}
+
+void smartlist_del(smartlist_t *sl, int idx);
+void smartlist_del_keeporder(smartlist_t *sl, int idx);
+void smartlist_insert(smartlist_t *sl, int idx, void *val);
+void smartlist_sort(smartlist_t *sl,
+ int (*compare)(const void **a, const void **b));
+void *smartlist_get_most_frequent_(const smartlist_t *sl,
+ int (*compare)(const void **a, const void **b),
+ int *count_out);
+#define smartlist_get_most_frequent(sl, compare) \
+ smartlist_get_most_frequent_((sl), (compare), NULL)
+void smartlist_uniq(smartlist_t *sl,
+ int (*compare)(const void **a, const void **b),
+ void (*free_fn)(void *elt));
+
+void smartlist_sort_strings(smartlist_t *sl);
+void smartlist_sort_digests(smartlist_t *sl);
+void smartlist_sort_digests256(smartlist_t *sl);
+void smartlist_sort_pointers(smartlist_t *sl);
+
+const char *smartlist_get_most_frequent_string(smartlist_t *sl);
+const char *smartlist_get_most_frequent_string_(smartlist_t *sl,
+ int *count_out);
+const uint8_t *smartlist_get_most_frequent_digest256(smartlist_t *sl);
+
+void smartlist_uniq_strings(smartlist_t *sl);
+void smartlist_uniq_digests(smartlist_t *sl);
+void smartlist_uniq_digests256(smartlist_t *sl);
+void *smartlist_bsearch(smartlist_t *sl, const void *key,
+ int (*compare)(const void *key, const void **member));
+int smartlist_bsearch_idx(const smartlist_t *sl, const void *key,
+ int (*compare)(const void *key, const void **member),
+ int *found_out);
+
+void smartlist_pqueue_add(smartlist_t *sl,
+ int (*compare)(const void *a, const void *b),
+ int idx_field_offset,
+ void *item);
+void *smartlist_pqueue_pop(smartlist_t *sl,
+ int (*compare)(const void *a, const void *b),
+ int idx_field_offset);
+void smartlist_pqueue_remove(smartlist_t *sl,
+ int (*compare)(const void *a, const void *b),
+ int idx_field_offset,
+ void *item);
+void smartlist_pqueue_assert_ok(smartlist_t *sl,
+ int (*compare)(const void *a, const void *b),
+ int idx_field_offset);
+
+#define SPLIT_SKIP_SPACE 0x01
+#define SPLIT_IGNORE_BLANK 0x02
+#define SPLIT_STRIP_SPACE 0x04
+int smartlist_split_string(smartlist_t *sl, const char *str, const char *sep,
+ int flags, int max);
+char *smartlist_join_strings(smartlist_t *sl, const char *join, int terminate,
+ size_t *len_out) ATTR_MALLOC;
+char *smartlist_join_strings2(smartlist_t *sl, const char *join,
+ size_t join_len, int terminate, size_t *len_out)
+ ATTR_MALLOC;
+
+/** Iterate over the items in a smartlist <b>sl</b>, in order. For each item,
+ * assign it to a new local variable of type <b>type</b> named <b>var</b>, and
+ * execute the statements inside the loop body. Inside the loop, the loop
+ * index can be accessed as <b>var</b>_sl_idx and the length of the list can
+ * be accessed as <b>var</b>_sl_len.
+ *
+ * NOTE: Do not change the length of the list while the loop is in progress,
+ * unless you adjust the _sl_len variable correspondingly. See second example
+ * below.
+ *
+ * Example use:
+ * <pre>
+ * smartlist_t *list = smartlist_split("A:B:C", ":", 0, 0);
+ * SMARTLIST_FOREACH_BEGIN(list, char *, cp) {
+ * printf("%d: %s\n", cp_sl_idx, cp);
+ * tor_free(cp);
+ * } SMARTLIST_FOREACH_END(cp);
+ * smartlist_free(list);
+ * </pre>
+ *
+ * Example use (advanced):
+ * <pre>
+ * SMARTLIST_FOREACH_BEGIN(list, char *, cp) {
+ * if (!strcmp(cp, "junk")) {
+ * tor_free(cp);
+ * SMARTLIST_DEL_CURRENT(list, cp);
+ * }
+ * } SMARTLIST_FOREACH_END(cp);
+ * </pre>
+ */
+/* Note: these macros use token pasting, and reach into smartlist internals.
+ * This can make them a little daunting. Here's the approximate unpacking of
+ * the above examples, for entertainment value:
+ *
+ * <pre>
+ * smartlist_t *list = smartlist_split("A:B:C", ":", 0, 0);
+ * {
+ * int cp_sl_idx, cp_sl_len = smartlist_len(list);
+ * char *cp;
+ * for (cp_sl_idx = 0; cp_sl_idx < cp_sl_len; ++cp_sl_idx) {
+ * cp = smartlist_get(list, cp_sl_idx);
+ * printf("%d: %s\n", cp_sl_idx, cp);
+ * tor_free(cp);
+ * }
+ * }
+ * smartlist_free(list);
+ * </pre>
+ *
+ * <pre>
+ * {
+ * int cp_sl_idx, cp_sl_len = smartlist_len(list);
+ * char *cp;
+ * for (cp_sl_idx = 0; cp_sl_idx < cp_sl_len; ++cp_sl_idx) {
+ * cp = smartlist_get(list, cp_sl_idx);
+ * if (!strcmp(cp, "junk")) {
+ * tor_free(cp);
+ * smartlist_del(list, cp_sl_idx);
+ * --cp_sl_idx;
+ * --cp_sl_len;
+ * }
+ * }
+ * }
+ * </pre>
+ */
+#define SMARTLIST_FOREACH_BEGIN(sl, type, var) \
+ STMT_BEGIN \
+ int var ## _sl_idx, var ## _sl_len=(sl)->num_used; \
+ type var; \
+ for (var ## _sl_idx = 0; var ## _sl_idx < var ## _sl_len; \
+ ++var ## _sl_idx) { \
+ var = (sl)->list[var ## _sl_idx];
+
+#define SMARTLIST_FOREACH_END(var) \
+ var = NULL; \
+ (void) var ## _sl_idx; \
+ } STMT_END
+
+/**
+ * An alias for SMARTLIST_FOREACH_BEGIN and SMARTLIST_FOREACH_END, using
+ * <b>cmd</b> as the loop body. This wrapper is here for convenience with
+ * very short loops.
+ *
+ * By convention, we do not use this for loops which nest, or for loops over
+ * 10 lines or so. Use SMARTLIST_FOREACH_{BEGIN,END} for those.
+ */
+#define SMARTLIST_FOREACH(sl, type, var, cmd) \
+ SMARTLIST_FOREACH_BEGIN(sl,type,var) { \
+ cmd; \
+ } SMARTLIST_FOREACH_END(var)
+
+/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
+ * with the variable <b>var</b>, remove the current element in a way that
+ * won't confuse the loop. */
+#define SMARTLIST_DEL_CURRENT(sl, var) \
+ STMT_BEGIN \
+ smartlist_del(sl, var ## _sl_idx); \
+ --var ## _sl_idx; \
+ --var ## _sl_len; \
+ STMT_END
+
+/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
+ * with the variable <b>var</b>, remove the current element in a way that
+ * won't confuse the loop. */
+#define SMARTLIST_DEL_CURRENT_KEEPORDER(sl, var) \
+ STMT_BEGIN \
+ smartlist_del_keeporder(sl, var ## _sl_idx); \
+ --var ## _sl_idx; \
+ --var ## _sl_len; \
+ STMT_END
+
+/** Helper: While in a SMARTLIST_FOREACH loop over the list <b>sl</b> indexed
+ * with the variable <b>var</b>, replace the current element with <b>val</b>.
+ * Does not deallocate the current value of <b>var</b>.
+ */
+#define SMARTLIST_REPLACE_CURRENT(sl, var, val) \
+ STMT_BEGIN \
+ smartlist_set(sl, var ## _sl_idx, val); \
+ STMT_END
+
+/* Helper: Given two lists of items, possibly of different types, such that
+ * both lists are sorted on some common field (as determined by a comparison
+ * expression <b>cmpexpr</b>), and such that one list (<b>sl1</b>) has no
+ * duplicates on the common field, loop through the lists in lockstep, and
+ * execute <b>unmatched_var2</b> on items in var2 that do not appear in
+ * var1.
+ *
+ * WARNING: It isn't safe to add remove elements from either list while the
+ * loop is in progress.
+ *
+ * Example use:
+ * SMARTLIST_FOREACH_JOIN(routerstatus_list, routerstatus_t *, rs,
+ * routerinfo_list, routerinfo_t *, ri,
+ * tor_memcmp(rs->identity_digest, ri->identity_digest, 20),
+ * log_info(LD_GENERAL,"No match for %s", ri->nickname)) {
+ * log_info(LD_GENERAL, "%s matches routerstatus %p", ri->nickname, rs);
+ * } SMARTLIST_FOREACH_JOIN_END(rs, ri);
+ **/
+/* The example above unpacks (approximately) to:
+ * int rs_sl_idx = 0, rs_sl_len = smartlist_len(routerstatus_list);
+ * int ri_sl_idx, ri_sl_len = smartlist_len(routerinfo_list);
+ * int rs_ri_cmp;
+ * routerstatus_t *rs;
+ * routerinfo_t *ri;
+ * for (; ri_sl_idx < ri_sl_len; ++ri_sl_idx) {
+ * ri = smartlist_get(routerinfo_list, ri_sl_idx);
+ * while (rs_sl_idx < rs_sl_len) {
+ * rs = smartlist_get(routerstatus_list, rs_sl_idx);
+ * rs_ri_cmp = tor_memcmp(rs->identity_digest, ri->identity_digest, 20);
+ * if (rs_ri_cmp > 0) {
+ * break;
+ * } else if (rs_ri_cmp == 0) {
+ * goto matched_ri;
+ * } else {
+ * ++rs_sl_idx;
+ * }
+ * }
+ * log_info(LD_GENERAL,"No match for %s", ri->nickname);
+ * continue;
+ * matched_ri: {
+ * log_info(LD_GENERAL,"%s matches with routerstatus %p",ri->nickname,rs);
+ * }
+ * }
+ */
+#define SMARTLIST_FOREACH_JOIN(sl1, type1, var1, sl2, type2, var2, \
+ cmpexpr, unmatched_var2) \
+ STMT_BEGIN \
+ int var1 ## _sl_idx = 0, var1 ## _sl_len=(sl1)->num_used; \
+ int var2 ## _sl_idx = 0, var2 ## _sl_len=(sl2)->num_used; \
+ int var1 ## _ ## var2 ## _cmp; \
+ type1 var1; \
+ type2 var2; \
+ for (; var2##_sl_idx < var2##_sl_len; ++var2##_sl_idx) { \
+ var2 = (sl2)->list[var2##_sl_idx]; \
+ while (var1##_sl_idx < var1##_sl_len) { \
+ var1 = (sl1)->list[var1##_sl_idx]; \
+ var1##_##var2##_cmp = (cmpexpr); \
+ if (var1##_##var2##_cmp > 0) { \
+ break; \
+ } else if (var1##_##var2##_cmp == 0) { \
+ goto matched_##var2; \
+ } else { \
+ ++var1##_sl_idx; \
+ } \
+ } \
+ /* Ran out of v1, or no match for var2. */ \
+ unmatched_var2; \
+ continue; \
+ matched_##var2: ; \
+
+#define SMARTLIST_FOREACH_JOIN_END(var1, var2) \
+ } \
+ STMT_END
+
+#endif /* !defined(TOR_CONTAINER_H) */
diff --git a/src/lib/malloc/util_malloc.c b/src/lib/malloc/util_malloc.c
index 4a0b3a933..f3b0e50c7 100644
--- a/src/lib/malloc/util_malloc.c
+++ b/src/lib/malloc/util_malloc.c
@@ -12,7 +12,6 @@
#include "orconfig.h"
#include <stdlib.h>
-#include <stddef.h>
#include <string.h>
#include "lib/testsupport/testsupport.h"
diff --git a/src/lib/malloc/util_malloc.h b/src/lib/malloc/util_malloc.h
index 3da40351c..88ecc0453 100644
--- a/src/lib/malloc/util_malloc.h
+++ b/src/lib/malloc/util_malloc.h
@@ -11,6 +11,8 @@
#ifndef TOR_UTIL_MALLOC_H
#define TOR_UTIL_MALLOC_H
+#include <stddef.h>
+#include <stdlib.h>
#include "lib/cc/compat_compiler.h"
/* Memory management */
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