Donovan Hide donovanhide
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| go tool 6g -S test.go | |
| --- prog list "InvertedSlice.Len" --- | |
| 0000 (test.go:17) TEXT InvertedSlice.Len+0(SB),$0-32 | |
| 0001 (test.go:17) MOVQ s+8(FP),BX | |
| 0002 (test.go:17) MOVQ BX,.noname+24(FP) | |
| 0003 (test.go:17) RET , | |
| --- prog list "InvertedSlice.Swap" --- | |
| 0004 (test.go:18) TEXT InvertedSlice.Swap+0(SB),$0-40 |
donovanhide
/ Benchmark
Last active
December 11, 2015 01:29
Test to see if copy and pasted sort routine is faster than sort.Sort using interfaces
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| go test -bench=.* | |
| testing: warning: no tests to run | |
| PASS | |
| BenchmarkSort 5000000 707 ns/op | |
| BenchmarkShellSort 5000000 603 ns/op |
donovanhide
/ Merge sort benchmarks
Created
January 16, 2013 12:44
sort.Interface compatible merge sort
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| go test -bench=. | |
| PASS | |
| BenchmarkSortString1K 5000 386508 ns/op | |
| BenchmarkSortInt1K 10000 194999 ns/op | |
| BenchmarkSortInt64K 100 19355025 ns/op | |
| ok _/usr/local/code/timsort 9.003s | |
| go test -run=TestSortBM | |
| PASS | |
| ok _/usr/local/code/timsort 0.607s |
donovanhide
/ getcpu_amd64.s
Last active
November 5, 2022 02:14
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| // func GetCpuForThread() uint64 | |
| TEXT ·GetCpuForThread(SB),7,$0 | |
| MOVQ $0xB,AX | |
| XORQ CX,CX | |
| CPUID | |
| MOVQ DX,ret+0(FP) | |
| RET |
donovanhide
/ fixkey.py
Created
September 12, 2013 16:24
Solution to problem 3 in https://canyoufindit.co.uk/ The key file is corrupt. Rebuild it using pycrypto.
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| from Crypto.PublicKey import RSA | |
| import binascii | |
| badKey="""-----BEGIN RSA PRIVATE KEY----- | |
| MIIC2gIBAAKBgDfABK8+joDLdbFTDJ+y3PTTzkqCi1L2qEjgxdg1iyZshJTeKUck | |
| SYVyKBeOBtB3FwwqXVa6iNEHJeLFewFE6ulEOIcatVp11Zg0ibMfnqTivbd6t8/z | |
| 3KzqrFksg9xQiicMactmTqFkm8ro5ODc2NTQzMjEwLy4tLCslBOCOVHxAgMBAAEC | |
| gYATW12FB2BtQbecmSxh6rWjYENZRZhgdvoZS8oF9xlYfwdNtRF5/RR1/BwFia++ | |
| BAuBktgTu/KzORsjcNPzrd0uTCbTG6hW8YPK2ROVOOeAMHek8Nl3+SW5wdePKuWw | |
| MdjDDjqxXDns+ZC1d2Cpz5V+x+2znOYL0bsEKei0sWl7LQKBgDfABK8+joDLdbFT |
donovanhide
/ gist:6541191
Last active
December 22, 2015 22:39
https://canyoufindit.co.uk solution for fourth part. Find the two jpeg headers. Skip the first to reveal the second!
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| $curl -s http://www.theregister.co.uk/Design/page/hub/gchq-enigma2013/img/image/comp3.jpg | xxd -g0 | grep ffd8ff | |
| 0000000: ffd8ffe000104a4649460001010100c8 ......JFIF...... | |
| 000cbd0: 401fffd9ffd8ffe000104a4649460001 @.........JFIF.. | |
| $ curl -s -r 52180- http://www.theregister.co.uk/Design/page/hub/gchq-enigma2013/img/image/comp3.jpg > 4.jpg |
donovanhide
/ gist:11272001
Created
April 24, 2014 22:41
Reports on bytes used in the Ripple nodestore
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| --Total bytes used for nodes with LedgerSequence>=32570 | |
| SELECT MIN(Ledger),MAX(Ledger),FORMAT(SUM(Length),0) FROM headers WHERE Ledger>=32570; | |
| +-------------+-------------+-----------------------+ | |
| | MIN(Ledger) | MAX(Ledger) | FORMAT(SUM(Length),0) | | |
| +-------------+-------------+-----------------------+ | |
| | 32570 | 6234456 | 435,232,146,456 | | |
| +-------------+-------------+-----------------------+ | |
| 1 row in set (3 min 49.36 sec) |
donovanhide
/ gist:0e41e548bd43127bbfc5
Created
May 20, 2014 20:04
Evidence of no missing transactions in provided dump
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| ATTACH DATABASE 'ec1/hashnode.db' AS ec1; | |
| ATTACH DATABASE 'ec2/hashnode.db' AS ec2; | |
| ATTACH DATABASE 'ec3/hashnode.db' AS ec3; | |
| ATTACH DATABASE 'db_old.1/hashnode.db' AS db1; | |
| ATTACH DATABASE 'db_old.2/hashnode.db' AS db2; | |
| ATTACH DATABASE 'db.3/hashnode.db' AS db3; | |
| SELECT HEX(OBJECT) | |
| FROM( | |
| SELECT 'ec1' AS Source,* FROM ec1.CommittedObjects |
donovanhide
/ gist:5779ee044220f03e6c1e
Created
May 20, 2014 21:37
Transaction ids and raw transactions with transaction id prefix using transactions stored in transactions.db
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| 7B6226018FD59FBF988E045BBF4A4D457883F3B81BEA941B54AB2F8983BEA505:54584E0012000022000100002400000001614000082F79CD900068400000003B9ACA0073210330E7FC9D56BB25D6893BA3F317AE5BCF33B3291BD63DB32654A313222F7FD020744630440220196959B245C76126056B7654A44E541B9218BBE5447B22D8F70D6D1F061600C502203C9C490085685D94EE35B5705C333F83017CA62C65FA4E220EE557215079F97D8114B5F762798A53D543A014CAF8B297CFF8F2F937E88314C06883DA16983A0289DFAC996C491D8F8E8FD996 | |
| B6EC3A86F5850AAE97CCBBA44CA5A59E918BBD77E973918C150EBA949BA0E140:54584E001200002200010000240000000261401C6CDDFAD9100068400000000000000A73210330E7FC9D56BB25D6893BA3F317AE5BCF33B3291BD63DB32654A313222F7FD02074463044022032751BF8FF743E668C321FBB8688C788608B93CACF09A7798B7EC50FA76CDADA0220623EE19763363D0FAFC948414DDA4516CD56627A39C76AA7DD4822C119363D928114B5F762798A53D543A014CAF8B297CFF8F2F937E88314C06883DA16983A0289DFAC996C491D8F8E8FD996 | |
| 3792284EACC486632AD0426A8162516718E3F5753B9B79C7D57A916676F683B6:54584E00120000220001000024000000036140000000001E848068400000003B9ACA0073210330E7FC9 |
donovanhide
/ gist:3b65b9b465610789fcc1
Created
May 21, 2014 20:19
No sign of missing transactions in first Ripple Labs supplied complete ledger dump
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| lz4cat dump.lz4|LC_ALL=C gfgrep -f wanted > found |