diff options
Diffstat (limited to 'src/util.h')
| -rw-r--r-- | src/util.h | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/src/util.h b/src/util.h index 97911d7493..d129d13692 100644 --- a/src/util.h +++ b/src/util.h @@ -193,6 +193,7 @@ bool WildcardMatch(const char* psz, const char* mask); bool WildcardMatch(const std::string& str, const std::string& mask); void FileCommit(FILE *fileout); int GetFilesize(FILE* file); +bool TruncateFile(FILE *file, unsigned int length); void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length); bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest); boost::filesystem::path GetDefaultDataDir(); @@ -212,6 +213,7 @@ uint256 GetRandHash(); int64 GetTime(); void SetMockTime(int64 nMockTimeIn); int64 GetAdjustedTime(); +int64 GetTimeOffset(); std::string FormatFullVersion(); std::string FormatSubVersion(const std::string& name, int nClientVersion, const std::vector<std::string>& comments); void AddTimeData(const CNetAddr& ip, int64 nTime); @@ -403,13 +405,27 @@ bool SoftSetArg(const std::string& strArg, const std::string& strValue); */ bool SoftSetBoolArg(const std::string& strArg, bool fValue); +/** + * MWC RNG of George Marsaglia + * This is intended to be fast. It has a period of 2^59.3, though the + * least significant 16 bits only have a period of about 2^30.1. + * + * @return random value + */ +extern uint32_t insecure_rand_Rz; +extern uint32_t insecure_rand_Rw; +static inline uint32_t insecure_rand(void) +{ + insecure_rand_Rz=36969*(insecure_rand_Rz&65535)+(insecure_rand_Rz>>16); + insecure_rand_Rw=18000*(insecure_rand_Rw&65535)+(insecure_rand_Rw>>16); + return (insecure_rand_Rw<<16)+insecure_rand_Rz; +} - - - - - - +/** + * Seed insecure_rand using the random pool. + * @param Deterministic Use a determinstic seed + */ +void seed_insecure_rand(bool fDeterministic=false); /** Median filter over a stream of values. * Returns the median of the last N numbers |