diff options
Diffstat (limited to 'Source/cmTimestamp.cxx')
| -rw-r--r-- | Source/cmTimestamp.cxx | 172 |
1 files changed, 105 insertions, 67 deletions
diff --git a/Source/cmTimestamp.cxx b/Source/cmTimestamp.cxx index ac26503c6..4b9718847 100644 --- a/Source/cmTimestamp.cxx +++ b/Source/cmTimestamp.cxx @@ -1,112 +1,130 @@ -/*============================================================================ - CMake - Cross Platform Makefile Generator - Copyright 2012 Kitware, Inc., Insight Software Consortium - - Distributed under the OSI-approved BSD License (the "License"); - see accompanying file Copyright.txt for details. - - This software is distributed WITHOUT ANY WARRANTY; without even the - implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - See the License for more information. -============================================================================*/ +/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying + file Copyright.txt or https://cmake.org/licensing for details. */ #include "cmTimestamp.h" +#include "cmConfigure.h" #include <cstring> +#include <sstream> +#include <stdlib.h> -#include <sys/types.h> -#include <sys/stat.h> +#include "cmSystemTools.h" -//---------------------------------------------------------------------------- -std::string cmTimestamp::CurrentTime( - const std::string& formatString, bool utcFlag) +std::string cmTimestamp::CurrentTime(const std::string& formatString, + bool utcFlag) { - time_t currentTimeT = time(0); - if(currentTimeT == time_t(-1)) - { - return std::string(); + time_t currentTimeT = time(CM_NULLPTR); + std::string source_date_epoch; + cmSystemTools::GetEnv("SOURCE_DATE_EPOCH", source_date_epoch); + if (!source_date_epoch.empty()) { + std::istringstream iss(source_date_epoch); + iss >> currentTimeT; + if (iss.fail() || !iss.eof()) { + cmSystemTools::Error("Cannot parse SOURCE_DATE_EPOCH as integer"); + exit(27); } + } + if (currentTimeT == time_t(-1)) { + return std::string(); + } return CreateTimestampFromTimeT(currentTimeT, formatString, utcFlag); } -//---------------------------------------------------------------------------- std::string cmTimestamp::FileModificationTime(const char* path, - const std::string& formatString, bool utcFlag) + const std::string& formatString, + bool utcFlag) { - struct stat info; - memset(&info, 0, sizeof(info)); - - if(stat(path, &info) != 0) - { + if (!cmsys::SystemTools::FileExists(path)) { return std::string(); - } + } - return CreateTimestampFromTimeT(info.st_mtime, formatString, utcFlag); + time_t mtime = cmsys::SystemTools::ModifiedTime(path); + return CreateTimestampFromTimeT(mtime, formatString, utcFlag); } -//---------------------------------------------------------------------------- std::string cmTimestamp::CreateTimestampFromTimeT(time_t timeT, - std::string formatString, bool utcFlag) + std::string formatString, + bool utcFlag) const { - if(formatString.empty()) - { + if (formatString.empty()) { formatString = "%Y-%m-%dT%H:%M:%S"; - if(utcFlag) - { + if (utcFlag) { formatString += "Z"; - } } + } struct tm timeStruct; memset(&timeStruct, 0, sizeof(timeStruct)); - struct tm* ptr = (struct tm*) 0; - if(utcFlag) - { + struct tm* ptr = (struct tm*)CM_NULLPTR; + if (utcFlag) { ptr = gmtime(&timeT); - } - else - { + } else { ptr = localtime(&timeT); - } + } - if(ptr == 0) - { + if (ptr == CM_NULLPTR) { return std::string(); - } + } timeStruct = *ptr; std::string result; - for(std::string::size_type i = 0; i < formatString.size(); ++i) - { + for (std::string::size_type i = 0; i < formatString.size(); ++i) { char c1 = formatString[i]; - char c2 = (i+1 < formatString.size()) ? - formatString[i+1] : static_cast<char>(0); + char c2 = (i + 1 < formatString.size()) ? formatString[i + 1] + : static_cast<char>(0); - if(c1 == '%' && c2 != 0) - { - result += AddTimestampComponent(c2, timeStruct); + if (c1 == '%' && c2 != 0) { + result += AddTimestampComponent(c2, timeStruct, timeT); ++i; - } - else - { + } else { result += c1; - } } + } return result; } -//---------------------------------------------------------------------------- -std::string cmTimestamp::AddTimestampComponent( - char flag, struct tm& timeStruct) +time_t cmTimestamp::CreateUtcTimeTFromTm(struct tm& tm) const +{ +#if defined(_MSC_VER) && _MSC_VER >= 1400 + return _mkgmtime(&tm); +#else + // From Linux timegm() manpage. + + std::string tz_old; + cmSystemTools::GetEnv("TZ", tz_old); + tz_old = "TZ=" + tz_old; + + // The standard says that "TZ=" or "TZ=[UNRECOGNIZED_TZ]" means UTC. + // It seems that "TZ=" does NOT work, at least under Windows + // with neither MSVC nor MinGW, so let's use explicit "TZ=UTC" + + cmSystemTools::PutEnv("TZ=UTC"); + + tzset(); + + time_t result = mktime(&tm); + + cmSystemTools::PutEnv(tz_old); + + tzset(); + + return result; +#endif +} + +std::string cmTimestamp::AddTimestampComponent(char flag, + struct tm& timeStruct, + const time_t timeT) const { std::string formatString = "%"; formatString += flag; - switch(flag) - { + switch (flag) { + case 'a': + case 'b': case 'd': case 'H': case 'I': @@ -118,17 +136,37 @@ std::string cmTimestamp::AddTimestampComponent( case 'w': case 'y': case 'Y': + case '%': break; - default: - { - return formatString; + case 's': // Seconds since UNIX epoch (midnight 1-jan-1970) + { + // Build a time_t for UNIX epoch and substract from the input "timeT": + struct tm tmUnixEpoch; + memset(&tmUnixEpoch, 0, sizeof(tmUnixEpoch)); + tmUnixEpoch.tm_mday = 1; + tmUnixEpoch.tm_year = 1970 - 1900; + + const time_t unixEpoch = this->CreateUtcTimeTFromTm(tmUnixEpoch); + if (unixEpoch == -1) { + cmSystemTools::Error( + "Error generating UNIX epoch in " + "STRING(TIMESTAMP ...). Please, file a bug report aginst CMake"); + return std::string(); } + + std::ostringstream ss; + ss << static_cast<long int>(difftime(timeT, unixEpoch)); + return ss.str(); + } + default: { + return formatString; } + } char buffer[16]; - size_t size = strftime(buffer, sizeof(buffer), - formatString.c_str(), &timeStruct); + size_t size = + strftime(buffer, sizeof(buffer), formatString.c_str(), &timeStruct); return std::string(buffer, size); } |