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pattern.c
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pattern.c
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/*
* Vanitygen, vanity bitcoin address generator
* Copyright (C) 2011 <[email protected]>
*
* Vanitygen is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* Vanitygen is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Vanitygen. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <pthread.h>
#include <openssl/sha.h>
#include <openssl/ripemd.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/obj_mac.h>
#include <pcre.h>
#include "pattern.h"
#include "util.h"
/*
* Common code for execution helper
*/
int
vg_exec_context_init(vg_context_t *vcp, vg_exec_context_t *vxcp)
{
memset(vxcp, 0, sizeof(*vxcp));
vxcp->vxc_vc = vcp;
BN_init(&vxcp->vxc_bntarg);
BN_init(&vxcp->vxc_bnbase);
BN_init(&vxcp->vxc_bntmp);
BN_init(&vxcp->vxc_bntmp2);
BN_set_word(&vxcp->vxc_bnbase, 58);
vxcp->vxc_bnctx = BN_CTX_new();
assert(vxcp->vxc_bnctx);
vxcp->vxc_key = EC_KEY_new_by_curve_name(NID_secp256k1);
assert(vxcp->vxc_key);
EC_KEY_precompute_mult(vxcp->vxc_key, vxcp->vxc_bnctx);
return 1;
}
void
vg_exec_context_del(vg_exec_context_t *vxcp)
{
BN_clear_free(&vxcp->vxc_bntarg);
BN_clear_free(&vxcp->vxc_bnbase);
BN_clear_free(&vxcp->vxc_bntmp);
BN_clear_free(&vxcp->vxc_bntmp2);
BN_CTX_free(vxcp->vxc_bnctx);
vxcp->vxc_bnctx = NULL;
}
void
vg_exec_context_consolidate_key(vg_exec_context_t *vxcp)
{
if (vxcp->vxc_delta) {
BN_clear(&vxcp->vxc_bntmp);
BN_set_word(&vxcp->vxc_bntmp, vxcp->vxc_delta);
BN_add(&vxcp->vxc_bntmp2,
EC_KEY_get0_private_key(vxcp->vxc_key),
&vxcp->vxc_bntmp);
vg_set_privkey(&vxcp->vxc_bntmp2, vxcp->vxc_key);
vxcp->vxc_delta = 0;
}
}
void
vg_exec_context_calc_address(vg_exec_context_t *vxcp)
{
const EC_GROUP *pgroup;
unsigned char eckey_buf[96], hash1[32], hash2[20];
int len;
vg_exec_context_consolidate_key(vxcp);
pgroup = EC_KEY_get0_group(vxcp->vxc_key);
len = EC_POINT_point2oct(pgroup,
EC_KEY_get0_public_key(vxcp->vxc_key),
POINT_CONVERSION_UNCOMPRESSED,
eckey_buf,
sizeof(eckey_buf),
vxcp->vxc_bnctx);
SHA256(eckey_buf, len, hash1);
RIPEMD160(hash1, sizeof(hash1), hash2);
memcpy(&vxcp->vxc_binres[1],
hash2, 20);
}
enum {
timing_hist_size = 5
};
typedef struct _timing_info_s {
struct _timing_info_s *ti_next;
pthread_t ti_thread;
unsigned long ti_last_rate;
unsigned long long ti_hist_time[timing_hist_size];
unsigned long ti_hist_work[timing_hist_size];
int ti_hist_last;
} timing_info_t;
int
vg_output_timing(vg_context_t *vcp, int cycle, struct timeval *last)
{
static unsigned long long total = 0, prevfound = 0, sincelast = 0;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static timing_info_t *timing_head = NULL;
pthread_t me;
struct timeval tvnow, tv;
timing_info_t *tip, *mytip;
unsigned long long rate, myrate = 0, mytime;
double count, prob, time, targ;
char linebuf[80];
char *unit;
int rem, p, i;
const double targs[] = { 0.5, 0.75, 0.8, 0.9, 0.95, 1.0 };
/* Compute the rate */
gettimeofday(&tvnow, NULL);
timersub(&tvnow, last, &tv);
memcpy(last, &tvnow, sizeof(*last));
mytime = tv.tv_usec + (1000000ULL * tv.tv_sec);
if (!mytime)
mytime = 1;
rate = 0;
pthread_mutex_lock(&mutex);
me = pthread_self();
for (tip = timing_head, mytip = NULL; tip != NULL; tip = tip->ti_next) {
if (pthread_equal(tip->ti_thread, me)) {
mytip = tip;
p = ((tip->ti_hist_last + 1) % timing_hist_size);
tip->ti_hist_time[p] = mytime;
tip->ti_hist_work[p] = cycle;
tip->ti_hist_last = p;
mytime = 0;
myrate = 0;
for (i = 0; i < timing_hist_size; i++) {
mytime += tip->ti_hist_time[i];
myrate += tip->ti_hist_work[i];
}
myrate = (myrate * 1000000) / mytime;
tip->ti_last_rate = myrate;
rate += myrate;
} else
rate += tip->ti_last_rate;
}
if (!mytip) {
mytip = (timing_info_t *) malloc(sizeof(*tip));
mytip->ti_next = timing_head;
mytip->ti_thread = me;
timing_head = mytip;
mytip->ti_hist_last = 0;
mytip->ti_hist_time[0] = mytime;
mytip->ti_hist_work[0] = cycle;
for (i = 1; i < timing_hist_size; i++) {
mytip->ti_hist_time[i] = 1;
mytip->ti_hist_work[i] = 0;
}
myrate = ((unsigned long long)cycle * 1000000) / mytime;
mytip->ti_last_rate = myrate;
rate += myrate;
}
total += cycle;
if (prevfound != vcp->vc_found) {
prevfound = vcp->vc_found;
sincelast = 0;
}
sincelast += cycle;
count = sincelast;
if (mytip != timing_head) {
pthread_mutex_unlock(&mutex);
return myrate;
}
pthread_mutex_unlock(&mutex);
targ = rate;
unit = "key/s";
if (targ > 1000) {
unit = "Kkey/s";
targ /= 1000.0;
if (targ > 1000) {
unit = "Mkey/s";
targ /= 1000.0;
}
}
rem = sizeof(linebuf);
p = snprintf(linebuf, rem, "[%.2f %s][total %lld]",
targ, unit, total);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
if (vcp->vc_chance >= 1.0) {
prob = 1.0f - exp(-count/vcp->vc_chance);
if (prob <= 0.999) {
p = snprintf(&linebuf[p], rem, "[Prob %.1f%%]",
prob * 100);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
p = sizeof(linebuf) - rem;
}
for (i = 0; i < sizeof(targs)/sizeof(targs[0]); i++) {
targ = targs[i];
if ((targ < 1.0) && (prob <= targ))
break;
}
if (targ < 1.0) {
time = ((-vcp->vc_chance * log(1.0 - targ)) - count) /
rate;
unit = "s";
if (time > 60) {
time /= 60;
unit = "min";
if (time > 60) {
time /= 60;
unit = "h";
if (time > 24) {
time /= 24;
unit = "d";
if (time > 365) {
time /= 365;
unit = "y";
}
}
}
}
if (time > 1000000) {
p = snprintf(&linebuf[p], rem,
"[%d%% in %e%s]",
(int) (100 * targ), time, unit);
} else {
p = snprintf(&linebuf[p], rem,
"[%d%% in %.1f%s]",
(int) (100 * targ), time, unit);
}
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
p = sizeof(linebuf) - rem;
}
}
if (vcp->vc_found) {
if (vcp->vc_remove_on_match)
p = snprintf(&linebuf[p], rem, "[Found %lld/%ld]",
vcp->vc_found, vcp->vc_npatterns_start);
else
p = snprintf(&linebuf[p], rem, "[Found %lld]",
vcp->vc_found);
assert(p > 0);
rem -= p;
if (rem < 0)
rem = 0;
}
if (rem) {
memset(&linebuf[sizeof(linebuf)-rem], 0x20, rem);
linebuf[sizeof(linebuf)-1] = '\0';
}
printf("\r%s", linebuf);
fflush(stdout);
return myrate;
}
void
vg_output_match(vg_context_t *vcp, EC_KEY *pkey, const char *pattern)
{
unsigned char key_buf[512], *pend;
char addr_buf[64];
char privkey_buf[VG_PROTKEY_MAX_B58];
const char *keytype = "Privkey";
int len;
assert(EC_KEY_check_key(pkey));
vg_encode_address(pkey, vcp->vc_addrtype, addr_buf);
if (vcp->vc_key_protect_pass) {
len = vg_protect_encode_privkey(privkey_buf,
pkey, vcp->vc_privtype,
VG_PROTKEY_DEFAULT,
vcp->vc_key_protect_pass);
if (len) {
keytype = "Protkey";
} else {
fprintf(stderr,
"ERROR: could not password-protect key\n");
vcp->vc_key_protect_pass = NULL;
}
}
if (!vcp->vc_key_protect_pass) {
vg_encode_privkey(pkey, vcp->vc_privtype, privkey_buf);
}
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
printf("\r%79s\rPattern: %s\n", "", pattern);
}
if (vcp->vc_verbose > 0) {
if (vcp->vc_verbose > 1) {
pend = key_buf;
len = i2o_ECPublicKey(pkey, &pend);
printf("Pubkey (hex): ");
dumphex(key_buf, len);
printf("Privkey (hex): ");
dumpbn(EC_KEY_get0_private_key(pkey));
pend = key_buf;
len = i2d_ECPrivateKey(pkey, &pend);
printf("Privkey (ASN1): ");
dumphex(key_buf, len);
}
}
if (!vcp->vc_result_file || (vcp->vc_verbose > 0)) {
printf("Address: %s\n"
"%s: %s\n",
addr_buf, keytype, privkey_buf);
}
if (vcp->vc_result_file) {
FILE *fp = fopen(vcp->vc_result_file, "a");
if (!fp) {
fprintf(stderr,
"ERROR: could not open result file: %s\n",
strerror(errno));
} else {
fprintf(fp,
"Pattern: %s\n"
"Address: %s\n"
"%s: %s\n",
pattern, addr_buf, keytype, privkey_buf);
fclose(fp);
}
}
}
void
vg_context_free(vg_context_t *vcp)
{
vcp->vc_free(vcp);
}
int
vg_context_add_patterns(vg_context_t *vcp,
char ** const patterns, int npatterns)
{
return vcp->vc_add_patterns(vcp, patterns, npatterns);
}
int
vg_context_hash160_sort(vg_context_t *vcp, void *buf)
{
if (!vcp->vc_hash160_sort)
return 0;
return vcp->vc_hash160_sort(vcp, buf);
}
/*
* Find the bignum ranges that produce a given prefix.
*/
static int
get_prefix_ranges(int addrtype, const char *pfx, BIGNUM **result,
BN_CTX *bnctx)
{
int i, p, c;
int zero_prefix = 0;
int check_upper = 0;
int b58pow, b58ceil, b58top = 0;
int ret = -1;
BIGNUM bntarg, bnceil, bnfloor;
BIGNUM bnbase;
BIGNUM *bnap, *bnbp, *bntp;
BIGNUM *bnhigh = NULL, *bnlow = NULL, *bnhigh2 = NULL, *bnlow2 = NULL;
BIGNUM bntmp, bntmp2;
BN_init(&bntarg);
BN_init(&bnceil);
BN_init(&bnfloor);
BN_init(&bnbase);
BN_init(&bntmp);
BN_init(&bntmp2);
BN_set_word(&bnbase, 58);
p = strlen(pfx);
for (i = 0; i < p; i++) {
c = vg_b58_reverse_map[(int)pfx[i]];
if (c == -1) {
fprintf(stderr,
"Invalid character '%c' in prefix '%s'\n",
pfx[i], pfx);
goto out;
}
if (i == zero_prefix) {
if (c == 0) {
/* Add another zero prefix */
zero_prefix++;
if (zero_prefix > 19) {
fprintf(stderr,
"Prefix '%s' is too long\n",
pfx);
goto out;
}
continue;
}
/* First non-zero character */
b58top = c;
BN_set_word(&bntarg, c);
} else {
BN_set_word(&bntmp2, c);
BN_mul(&bntmp, &bntarg, &bnbase, bnctx);
BN_add(&bntarg, &bntmp, &bntmp2);
}
}
/* Power-of-two ceiling and floor values based on leading 1s */
BN_clear(&bntmp);
BN_set_bit(&bntmp, 200 - (zero_prefix * 8));
BN_sub(&bnceil, &bntmp, BN_value_one());
BN_set_bit(&bnfloor, 192 - (zero_prefix * 8));
bnlow = BN_new();
bnhigh = BN_new();
if (b58top) {
/*
* If a non-zero was given in the prefix, find the
* numeric boundaries of the prefix.
*/
BN_copy(&bntmp, &bnceil);
bnap = &bntmp;
bnbp = &bntmp2;
b58pow = 0;
while (BN_cmp(bnap, &bnbase) > 0) {
b58pow++;
BN_div(bnbp, NULL, bnap, &bnbase, bnctx);
bntp = bnap;
bnap = bnbp;
bnbp = bntp;
}
b58ceil = BN_get_word(bnap);
if ((b58pow - (p - zero_prefix)) < 6) {
/*
* Do not allow the prefix to constrain the
* check value, this is ridiculous.
*/
fprintf(stderr, "Prefix '%s' is too long\n", pfx);
goto out;
}
BN_set_word(&bntmp2, b58pow - (p - zero_prefix));
BN_exp(&bntmp, &bnbase, &bntmp2, bnctx);
BN_mul(bnlow, &bntmp, &bntarg, bnctx);
BN_sub(&bntmp2, &bntmp, BN_value_one());
BN_add(bnhigh, bnlow, &bntmp2);
if (b58top <= b58ceil) {
/* Fill out the upper range too */
check_upper = 1;
bnlow2 = BN_new();
bnhigh2 = BN_new();
BN_mul(bnlow2, bnlow, &bnbase, bnctx);
BN_mul(&bntmp2, bnhigh, &bnbase, bnctx);
BN_set_word(&bntmp, 57);
BN_add(bnhigh2, &bntmp2, &bntmp);
/*
* Addresses above the ceiling will have one
* fewer "1" prefix in front than we require.
*/
if (BN_cmp(&bnceil, bnlow2) < 0) {
/* High prefix is above the ceiling */
check_upper = 0;
BN_free(bnhigh2);
bnhigh2 = NULL;
BN_free(bnlow2);
bnlow2 = NULL;
}
else if (BN_cmp(&bnceil, bnhigh2) < 0)
/* High prefix is partly above the ceiling */
BN_copy(bnhigh2, &bnceil);
/*
* Addresses below the floor will have another
* "1" prefix in front instead of our target.
*/
if (BN_cmp(&bnfloor, bnhigh) >= 0) {
/* Low prefix is completely below the floor */
assert(check_upper);
check_upper = 0;
BN_free(bnhigh);
bnhigh = bnhigh2;
bnhigh2 = NULL;
BN_free(bnlow);
bnlow = bnlow2;
bnlow2 = NULL;
}
else if (BN_cmp(&bnfloor, bnlow) > 0) {
/* Low prefix is partly below the floor */
BN_copy(bnlow, &bnfloor);
}
}
} else {
BN_copy(bnhigh, &bnceil);
BN_clear(bnlow);
}
/* Limit the prefix to the address type */
BN_clear(&bntmp);
BN_set_word(&bntmp, addrtype);
BN_lshift(&bntmp2, &bntmp, 192);
if (check_upper) {
if (BN_cmp(&bntmp2, bnhigh2) > 0) {
check_upper = 0;
BN_free(bnhigh2);
bnhigh2 = NULL;
BN_free(bnlow2);
bnlow2 = NULL;
}
else if (BN_cmp(&bntmp2, bnlow2) > 0)
BN_copy(bnlow2, &bntmp2);
}
if (BN_cmp(&bntmp2, bnhigh) > 0) {
if (!check_upper)
goto not_possible;
check_upper = 0;
BN_free(bnhigh);
bnhigh = bnhigh2;
bnhigh2 = NULL;
BN_free(bnlow);
bnlow = bnlow2;
bnlow2 = NULL;
}
else if (BN_cmp(&bntmp2, bnlow) > 0) {
BN_copy(bnlow, &bntmp2);
}
BN_set_word(&bntmp, addrtype + 1);
BN_lshift(&bntmp2, &bntmp, 192);
if (check_upper) {
if (BN_cmp(&bntmp2, bnlow2) < 0) {
check_upper = 0;
BN_free(bnhigh2);
bnhigh2 = NULL;
BN_free(bnlow2);
bnlow2 = NULL;
}
else if (BN_cmp(&bntmp2, bnhigh2) < 0)
BN_copy(bnlow2, &bntmp2);
}
if (BN_cmp(&bntmp2, bnlow) < 0) {
if (!check_upper)
goto not_possible;
check_upper = 0;
BN_free(bnhigh);
bnhigh = bnhigh2;
bnhigh2 = NULL;
BN_free(bnlow);
bnlow = bnlow2;
bnlow2 = NULL;
}
else if (BN_cmp(&bntmp2, bnhigh) < 0) {
BN_copy(bnhigh, &bntmp2);
}
/* Address ranges are complete */
assert(check_upper || ((bnlow2 == NULL) && (bnhigh2 == NULL)));
result[0] = bnlow;
result[1] = bnhigh;
result[2] = bnlow2;
result[3] = bnhigh2;
bnlow = NULL;
bnhigh = NULL;
bnlow2 = NULL;
bnhigh2 = NULL;
ret = 0;
if (0) {
not_possible:
ret = -2;
}
out:
BN_clear_free(&bntarg);
BN_clear_free(&bnceil);
BN_clear_free(&bnfloor);
BN_clear_free(&bnbase);
BN_clear_free(&bntmp);
BN_clear_free(&bntmp2);
if (bnhigh)
BN_free(bnhigh);
if (bnlow)
BN_free(bnlow);
if (bnhigh2)
BN_free(bnhigh2);
if (bnlow2)
BN_free(bnlow2);
return ret;
}
/*
* AVL tree implementation
*/
typedef enum { CENT = 1, LEFT = 0, RIGHT = 2 } avl_balance_t;
typedef struct _avl_item_s {
struct _avl_item_s *ai_left, *ai_right, *ai_up;
avl_balance_t ai_balance;
#ifndef NDEBUG
int ai_indexed;
#endif
} avl_item_t;
typedef struct _avl_root_s {
avl_item_t *ar_root;
} avl_root_t;
static INLINE void
avl_root_init(avl_root_t *rootp)
{
rootp->ar_root = NULL;
}
static INLINE int
avl_root_empty(avl_root_t *rootp)
{
return (rootp->ar_root == NULL) ? 1 : 0;
}
static INLINE void
avl_item_init(avl_item_t *itemp)
{
memset(itemp, 0, sizeof(*itemp));
itemp->ai_balance = CENT;
}
#define container_of(ptr, type, member) \
(((type*) (((unsigned char *)ptr) - \
(size_t)&(((type *)((unsigned char *)0))->member))))
#define avl_item_entry(ptr, type, member) \
container_of(ptr, type, member)
static INLINE void
_avl_rotate_ll(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *tmp;
tmp = itemp->ai_left;
itemp->ai_left = tmp->ai_right;
if (itemp->ai_left)
itemp->ai_left->ai_up = itemp;
tmp->ai_right = itemp;
if (itemp->ai_up) {
if (itemp->ai_up->ai_left == itemp) {
itemp->ai_up->ai_left = tmp;
} else {
assert(itemp->ai_up->ai_right == itemp);
itemp->ai_up->ai_right = tmp;
}
} else {
rootp->ar_root = tmp;
}
tmp->ai_up = itemp->ai_up;
itemp->ai_up = tmp;
}
static INLINE void
_avl_rotate_lr(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *rcp, *rlcp;
rcp = itemp->ai_left;
rlcp = rcp->ai_right;
if (itemp->ai_up) {
if (itemp == itemp->ai_up->ai_left) {
itemp->ai_up->ai_left = rlcp;
} else {
assert(itemp == itemp->ai_up->ai_right);
itemp->ai_up->ai_right = rlcp;
}
} else {
rootp->ar_root = rlcp;
}
rlcp->ai_up = itemp->ai_up;
rcp->ai_right = rlcp->ai_left;
if (rcp->ai_right)
rcp->ai_right->ai_up = rcp;
itemp->ai_left = rlcp->ai_right;
if (itemp->ai_left)
itemp->ai_left->ai_up = itemp;
rlcp->ai_left = rcp;
rlcp->ai_right = itemp;
rcp->ai_up = rlcp;
itemp->ai_up = rlcp;
}
static INLINE void
_avl_rotate_rr(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *tmp;
tmp = itemp->ai_right;
itemp->ai_right = tmp->ai_left;
if (itemp->ai_right)
itemp->ai_right->ai_up = itemp;
tmp->ai_left = itemp;
if (itemp->ai_up) {
if (itemp->ai_up->ai_right == itemp) {
itemp->ai_up->ai_right = tmp;
} else {
assert(itemp->ai_up->ai_left == itemp);
itemp->ai_up->ai_left = tmp;
}
} else {
rootp->ar_root = tmp;
}
tmp->ai_up = itemp->ai_up;
itemp->ai_up = tmp;
}
static INLINE void
_avl_rotate_rl(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *rcp, *rlcp;
rcp = itemp->ai_right;
rlcp = rcp->ai_left;
if (itemp->ai_up) {
if (itemp == itemp->ai_up->ai_right) {
itemp->ai_up->ai_right = rlcp;
} else {
assert(itemp == itemp->ai_up->ai_left);
itemp->ai_up->ai_left = rlcp;
}
} else {
rootp->ar_root = rlcp;
}
rlcp->ai_up = itemp->ai_up;
rcp->ai_left = rlcp->ai_right;
if (rcp->ai_left)
rcp->ai_left->ai_up = rcp;
itemp->ai_right = rlcp->ai_left;
if (itemp->ai_right)
itemp->ai_right->ai_up = itemp;
rlcp->ai_right = rcp;
rlcp->ai_left = itemp;
rcp->ai_up = rlcp;
itemp->ai_up = rlcp;
}
static void
avl_delete_fix(avl_root_t *rootp, avl_item_t *itemp, avl_item_t *parentp)
{
avl_item_t *childp;
if ((parentp->ai_left == NULL) &&
(parentp->ai_right == NULL)) {
assert(itemp == NULL);
parentp->ai_balance = CENT;
itemp = parentp;
parentp = itemp->ai_up;
}
while (parentp) {
if (itemp == parentp->ai_right) {
itemp = parentp->ai_left;
if (parentp->ai_balance == LEFT) {
/* Parent was left-heavy, now worse */
if (itemp->ai_balance == LEFT) {
/* If left child is also
* left-heavy, LL fixes it. */
_avl_rotate_ll(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
parentp = itemp;
} else if (itemp->ai_balance == CENT) {
_avl_rotate_ll(rootp, parentp);
itemp->ai_balance = RIGHT;
parentp->ai_balance = LEFT;
break;
} else {
childp = itemp->ai_right;
_avl_rotate_lr(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
if (childp->ai_balance == RIGHT)
itemp->ai_balance = LEFT;
if (childp->ai_balance == LEFT)
parentp->ai_balance = RIGHT;
childp->ai_balance = CENT;
parentp = childp;
}
} else if (parentp->ai_balance == CENT) {
parentp->ai_balance = LEFT;
break;
} else {
parentp->ai_balance = CENT;
}
} else {
itemp = parentp->ai_right;
if (parentp->ai_balance == RIGHT) {
if (itemp->ai_balance == RIGHT) {
_avl_rotate_rr(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
parentp = itemp;
} else if (itemp->ai_balance == CENT) {
_avl_rotate_rr(rootp, parentp);
itemp->ai_balance = LEFT;
parentp->ai_balance = RIGHT;
break;
} else {
childp = itemp->ai_left;
_avl_rotate_rl(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
if (childp->ai_balance == RIGHT)
parentp->ai_balance = LEFT;
if (childp->ai_balance == LEFT)
itemp->ai_balance = RIGHT;
childp->ai_balance = CENT;
parentp = childp;
}
} else if (parentp->ai_balance == CENT) {
parentp->ai_balance = RIGHT;
break;
} else {
parentp->ai_balance = CENT;
}
}
itemp = parentp;
parentp = itemp->ai_up;
}
}
static void
avl_insert_fix(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *childp, *parentp = itemp->ai_up;
itemp->ai_left = itemp->ai_right = NULL;
#ifndef NDEBUG
assert(!itemp->ai_indexed);
itemp->ai_indexed = 1;
#endif
while (parentp) {
if (itemp == parentp->ai_left) {
if (parentp->ai_balance == LEFT) {
/* Parent was left-heavy, now worse */
if (itemp->ai_balance == LEFT) {
/* If left child is also
* left-heavy, LL fixes it. */
_avl_rotate_ll(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
break;
} else {
assert(itemp->ai_balance != CENT);
childp = itemp->ai_right;
_avl_rotate_lr(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
if (childp->ai_balance == RIGHT)
itemp->ai_balance = LEFT;
if (childp->ai_balance == LEFT)
parentp->ai_balance = RIGHT;
childp->ai_balance = CENT;
break;
}
} else if (parentp->ai_balance == CENT) {
parentp->ai_balance = LEFT;
} else {
parentp->ai_balance = CENT;
return;
}
} else {
if (parentp->ai_balance == RIGHT) {
if (itemp->ai_balance == RIGHT) {
_avl_rotate_rr(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
break;
} else {
assert(itemp->ai_balance != CENT);
childp = itemp->ai_left;
_avl_rotate_rl(rootp, parentp);
itemp->ai_balance = CENT;
parentp->ai_balance = CENT;
if (childp->ai_balance == RIGHT)
parentp->ai_balance = LEFT;
if (childp->ai_balance == LEFT)
itemp->ai_balance = RIGHT;
childp->ai_balance = CENT;
break;
}
} else if (parentp->ai_balance == CENT) {
parentp->ai_balance = RIGHT;
} else {
parentp->ai_balance = CENT;
break;
}
}
itemp = parentp;
parentp = itemp->ai_up;
}
}
static INLINE avl_item_t *
avl_first(avl_root_t *rootp)
{
avl_item_t *itemp = rootp->ar_root;
if (itemp) {
while (itemp->ai_left)
itemp = itemp->ai_left;
}
return itemp;
}
static INLINE avl_item_t *
avl_next(avl_item_t *itemp)
{
if (itemp->ai_right) {
itemp = itemp->ai_right;
while (itemp->ai_left)
itemp = itemp->ai_left;
return itemp;
}
while (itemp->ai_up && (itemp == itemp->ai_up->ai_right))
itemp = itemp->ai_up;
if (!itemp->ai_up)
return NULL;
return itemp->ai_up;
}
static void
avl_remove(avl_root_t *rootp, avl_item_t *itemp)
{
avl_item_t *relocp, *replacep, *parentp = NULL;