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bloomslice_hashes.py
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bloomslice_hashes.py
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#!/bin/sh
""""command -v python3 >/dev/null && exec python3 "$0" "$@"
command -v python2 >/dev/null && exec python2 "$0" "$@"
command -v python >/dev/null && exec python "$0" "$@"
exit 1 """#"
from __future__ import print_function
import sys
import itertools
import random
random.seed(31337)
#from random import SystemRandom
#random = SystemRandom()
MAX_HASHES = 96
def padcstr(s, length):
n = len(s) + 1
if n < length:
s += '\\0' * (length - n)
return '"%s"' % s
combos_b2 = list(itertools.combinations(range(20), 2))
random.shuffle(combos_b2)
cb2 = []
counts_b = [0,0,0,0,0, 0,0,0,0,0, 0,0,0,0,0, 0,0,0,0,0]
while len(cb2) < len(combos_b2):
best_c = None
best_s = 999999999
for c in combos_b2:
if c not in cb2:
s = counts_b[c[0]] + counts_b[c[1]]
if s < best_s:
c = list(c)
random.shuffle(c)
c = tuple(c)
best_s = s
best_c = c
counts_b[best_c[0]] += 1
counts_b[best_c[1]] += 1
cb2.append(best_c)
cs1 = list(itertools.combinations(range(10), 1))
random.shuffle(cs1)
combos_s2 = list(itertools.combinations(range(10), 2))
random.shuffle(combos_s2)
cs2 = []
counts_s = [0,0,0,0,0, 0,0,0,0,0]
while len(cs2) < len(combos_s2):
best_c = None
best_s = 999999999
for c in combos_s2:
if c not in cs2:
s = counts_s[c[0]] + counts_s[c[1]]
if s < best_s:
best_s = s
best_c = c
counts_s[best_c[0]] += 1
counts_s[best_c[1]] += 1
cs2.append(best_c)
combos_s3 = list(itertools.combinations(range(10), 3))
random.shuffle(combos_s3)
combos_s = []
cs3 = []
cs3_sorted = []
counts_s = [0,0,0,0,0, 0,0,0,0,0]
for a in cs2:
best_c = None
best_s = 999999999
x = list(range(10))
random.shuffle(x)
for n in x:
if n not in a:
c = (n, a[0], a[1])
c_sorted = tuple(sorted(c))
if c_sorted not in cs3_sorted:
s = counts_s[n]
if s < best_s:
best_s = s
best_c = c
if best_c is None:
print('fucked')
sys.exit(0)
counts_s[best_c[0]] += 1
cs3.append(best_c)
cs3_sorted.append(tuple(sorted(best_c)))
counts_s = [0,0,0,0,0, 0,0,0,0,0]
for c in cs3:
counts_s[c[0]] += 1
counts_s[c[1]] += 1
counts_s[c[2]] += 1
while len(cs3) < len(combos_s3):
best_c = None
best_s = 999999999
for c in combos_s3:
if c not in cs3_sorted:
s = counts_s[c[0]] + counts_s[c[1]] + counts_s[c[2]]
if s < best_s:
best_s = s
best_c = c
counts_s[best_c[0]] += 1
counts_s[best_c[1]] += 1
counts_s[best_c[2]] += 1
cs3_sorted.append(best_c)
best_c = list(best_c)
random.shuffle(best_c)
best_c = tuple(best_c)
cs3.append(best_c)
with open(sys.argv[1], 'w') as f:
f.write('#include <stdint.h>\n')
f.write('#include <stdlib.h>\n')
f.write('#include <string.h>\n')
f.write('#include <unistd.h>\n')
f.write('\n')
f.write('#include "bloom_h160_chk.h"\n')
f.write('#include "extern.h"\n')
f.write('\n')
n = min(MAX_HASHES, len(cs3))
f.write('uint8_t hash3sN = %d;\n' % n)
f.write('uint8_t data3sT[] = {\n')
for i in range(n):
c = cs3[i]
f.write(' %d, %d, %d' % (c[0], c[1], c[2]))
if i < n-1:
f.write(',')
if i % 8 == 7:
f.write('\n')
else:
f.write('\n')
f.write('};\n\n')
n = min(MAX_HASHES, len(cs2))
f.write('uint8_t hash2sN = %d;\n' % n)
f.write('uint8_t data2sT[] = {\n')
for i in range(n):
c = cs3[i]
f.write(' %d, %d' % (c[1], c[2]))
if i < n-1:
f.write(',')
if i % 9 == 8:
f.write('\n')
else:
f.write('\n')
f.write('};\n\n')
n = min(MAX_HASHES, len(cs1))
f.write('uint8_t hash1sN = %d;\n' % n)
f.write('uint8_t data1sT[] = {')
for i in range(n):
c = cs1[i]
f.write(' %d' % (c[0]))
if i < n-1:
f.write(',')
f.write('};\n\n')
n = min(MAX_HASHES, len(cb2))
f.write('uint8_t hash2bN = %d;\n' % n)
f.write('uint8_t data2bT[] = {\n')
for i in range(n):
c = cb2[i]
f.write(' %2d, %2d' % (c[0], c[1]))
if i < n-1:
f.write(',')
if i % 8 == 7:
f.write('\n')
else:
f.write('\n')
f.write('};\n\n')
desc = ['abort'] * 256
desc[255] = 'error'
desc[0] = 'legacy'
desc[1] = 'single'
f.write('int32_t __attribute__ ((noinline)) bloom_h160_chk(const uint8_t *mem, const void *h160, uint8_t n, uint64_t mask) {\n')
f.write(' const uint32_t *hL = (uint32_t*)h160;\n')
f.write(' const uint16_t *hS = (uint16_t*)h160;\n')
f.write(' const uint8_t *hC = (uint8_t*)h160;\n')
f.write(' uint64_t t;\n\n')
#if_miss = 'if (((mem[(t)>>3]>>((t)&7))&1) == 0) { goto bloom_miss; }'
if_miss = 'if (((mem[(t)>>3]>>((t)&7))&1) == 0) { return 0; }'
f.write(' asm volatile ("nop");\n')
f.write(' switch (n) {\n')
f.write(' case 0: // legacy\n')
f.write(' t = (hL[0]); %s\n' % if_miss)
f.write(' t = (hL[1]); %s\n' % if_miss)
f.write(' t = (hL[2]); %s\n' % if_miss)
f.write(' t = (hL[3]); %s\n' % if_miss)
f.write(' t = (hL[4]); %s\n' % if_miss)
f.write(' t = (hL[0]<<16|hL[1]>>16); %s\n' % if_miss)
f.write(' t = (hL[1]<<16|hL[2]>>16); %s\n' % if_miss)
f.write(' t = (hL[2]<<16|hL[3]>>16); %s\n' % if_miss)
f.write(' t = (hL[3]<<16|hL[4]>>16); %s\n' % if_miss)
f.write(' t = (hL[4]<<16|hL[0]>>16); %s\n' % if_miss)
f.write(' t = (hL[0]<< 8|hL[1]>>24); %s\n' % if_miss)
f.write(' t = (hL[1]<< 8|hL[2]>>24); %s\n' % if_miss)
f.write(' t = (hL[2]<< 8|hL[3]>>24); %s\n' % if_miss)
f.write(' t = (hL[3]<< 8|hL[4]>>24); %s\n' % if_miss)
f.write(' t = (hL[4]<< 8|hL[0]>>24); %s\n' % if_miss)
f.write(' t = (hL[0]<<24|hL[1]>> 8); %s\n' % if_miss)
f.write(' t = (hL[1]<<24|hL[2]>> 8); %s\n' % if_miss)
f.write(' t = (hL[2]<<24|hL[3]>> 8); %s\n' % if_miss)
f.write(' t = (hL[3]<<24|hL[4]>> 8); %s\n' % if_miss)
f.write(' t = (hL[4]<<24|hL[0]>> 8); %s\n' % if_miss)
f.write(' return 1;\n')
f.write(' case 1: // single\n')
f.write(' return memcmp(mem, h160, 20) == 0 ? 1 : 0;\n')
caseOffset = 2
n = min(MAX_HASHES, len(cs1))
for i in range(1, n+1):
nHash = 1 + (n - i)
algId = (caseOffset + n) - i
algName = 'h1s%d' % nHash
desc[algId] = algName
c = cs1[n-i]
f.write(' case %3d: // %s\n' % (algId, algName))
f.write(' t = ((uint64_t)hS[%d]) & mask;\n' % c[0])
f.write(' %s\n' % if_miss)
if i != n:
f.write(' // fall through\n')
else:
f.write(' return 1;\n')
caseOffset += n
n = min(MAX_HASHES, len(cb2))
for i in range(1, n+1):
nHash = 1 + (n - i)
algId = (caseOffset + n) - i
algName = 'h2b%d' % nHash
desc[algId] = algName
c = cb2[n-i]
f.write(' case %3d: // %s\n' % (algId, algName))
f.write(' t = ((((uint64_t)hC[%2d]) << 8)\n' % c[0])
f.write(' | ((uint64_t)hC[%2d])) & mask;\n' % c[1])
f.write(' %s\n' % if_miss)
if i != n:
f.write(' // fall through\n')
else:
f.write(' return 1;\n')
caseOffset += n
n = min(MAX_HASHES, len(cs2))
for i in range(1, n+1):
nHash = 1 + (n - i)
algId = (caseOffset + n) - i
algName = 'h2s%d' % nHash
desc[algId] = algName
c = cs3[n-i]
f.write(' case %3d: // %s\n' % (algId, algName))
f.write(' t = ((((uint64_t)hS[%d]) << 16)\n' % c[1])
f.write(' | ((uint64_t)hS[%d])) & mask;\n' % c[2])
f.write(' %s\n' % if_miss)
if i != n:
f.write(' // fall through\n')
else:
f.write(' return 1;\n')
caseOffset += n
n = min(MAX_HASHES, len(cs3))
for i in range(1, n+1):
nHash = 1 + (n - i)
algId = (caseOffset + n) - i
algName = 'h3s%d' % nHash
desc[algId] = algName
c = cs3[n-i]
f.write(' case %3d: // %s\n' % (algId, algName))
f.write(' t = ((((uint64_t)hS[%d]) << 32)\n' % c[0])
f.write(' | (((uint64_t)hS[%d]) << 16)\n' % c[1])
f.write(' | ((uint64_t)hS[%d])) & mask;\n' % c[2])
f.write(' %s\n' % if_miss)
if i != n:
f.write(' // fall through\n')
else:
f.write(' return 1;\n')
f.write(' case 255: // error\n')
f.write(' return -1;\n')
f.write(' default: // abort\n')
f.write('#pragma GCC diagnostic ignored "-Wunused-result"\n')
f.write(' write(2, "Bad hash id!\\n", 13);\n')
f.write('#pragma GCC diagnostic pop\n')
f.write(' exit(255);\n')
f.write(' }\n\n')
#f.write('bloom_miss:\n')
f.write(' return 0;\n')
f.write('}\n\n')
f.write('char hashD[256][8] = {\n')
for i in range(256):
if i % 4 == 0:
f.write(' ')
f.write('%12s' % padcstr(desc[i], 8))
if i < 255:
f.write(',')
if i % 4 < 3:
f.write(' ')
else:
f.write('\n')
f.write('};\n\n')
f.write('uint64_t hashJ[256] = {\n')
for i in range(16):
f.write(' 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0')
if i < 15:
f.write(',')
f.write('\n')
f.write('};\n\n')
f.write('/* vim: set ts=2 sw=2 et ai si: */\n')