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Diffstat (limited to 'Source/cmFileTimeComparison.cxx')
| -rw-r--r-- | Source/cmFileTimeComparison.cxx | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/Source/cmFileTimeComparison.cxx b/Source/cmFileTimeComparison.cxx new file mode 100644 index 0000000..2b0c8cf --- /dev/null +++ b/Source/cmFileTimeComparison.cxx @@ -0,0 +1,168 @@ +/*========================================================================= + + Program: CMake - Cross-Platform Makefile Generator + Module: $RCSfile$ + Language: C++ + Date: $Date$ + Version: $Revision$ + + Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved. + See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details. + + This software is distributed WITHOUT ANY WARRANTY; without even + the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + PURPOSE. See the above copyright notices for more information. + +=========================================================================*/ +#include "cmFileTimeComparison.h" + +#include <cmsys/Directory.hxx> +#include <cmsys/RegularExpression.hxx> +#include <cmsys/SystemTools.hxx> + +#if defined(CMAKE_BUILD_WITH_CMAKE) +# include <cmsys/hash_map.hxx> +#endif + +#include <ctype.h> +#include <sys/stat.h> + +#if !defined(_WIN32) || defined(__CYGWIN__) +# define cmFileTimeComparison_Type struct stat +#else +# define cmFileTimeComparison_Type FILETIME +#endif + +class cmFileTimeComparisonInternal +{ +public: + inline bool FileTimeCompare(const char* f1, const char* f2, int* result); + +private: +#if defined(CMAKE_BUILD_WITH_CMAKE) + class HashString + { + public: + size_t operator()(const cmStdString& s) const + { + return h(s.c_str()); + } + cmsys::hash<const char*> h; + }; + typedef cmsys::hash_map<cmStdString, cmFileTimeComparison_Type, HashString> FileStatsMap; + FileStatsMap Files; +#endif + + inline bool Stat(const char* fname, cmFileTimeComparison_Type* st); + inline int Compare(cmFileTimeComparison_Type* st1, cmFileTimeComparison_Type* st2); +}; + +bool cmFileTimeComparisonInternal::Stat(const char* fname, cmFileTimeComparison_Type* st) +{ +#if defined(CMAKE_BUILD_WITH_CMAKE) + cmFileTimeComparisonInternal::FileStatsMap::iterator fit = this->Files.find(fname); + if ( fit != this->Files.end() ) + { + *st = fit->second; + return 0; + } +#endif +#if !defined(_WIN32) || defined(__CYGWIN__) + int res = ::stat(fname, st); + if ( res != 0 ) + { + return false; + } +#else + // Windows version. Create file handles and get the modification times. + HANDLE hf1 = CreateFile(f1, GENERIC_READ, FILE_SHARE_READ, + NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, + NULL); + if(hf1 == INVALID_HANDLE_VALUE) + { + return false; + } + if(!GetFileTime(hf1, 0, 0, st)) + { + CloseHandle(hf1); + return false; + } + CloseHandle(hf1); +#endif +#if defined(CMAKE_BUILD_WITH_CMAKE) + this->Files[fname] = *st; +#endif + return true; +} + +cmFileTimeComparison::cmFileTimeComparison() +{ + m_Internals = new cmFileTimeComparisonInternal; +} + +cmFileTimeComparison::~cmFileTimeComparison() +{ + delete m_Internals; +} + +bool cmFileTimeComparison::FileTimeCompare(const char* f1, const char* f2, int* result) +{ + return m_Internals->FileTimeCompare(f1, f2, result); +} + +int cmFileTimeComparisonInternal::Compare(cmFileTimeComparison_Type* s1, cmFileTimeComparison_Type* s2) +{ +#if !defined(_WIN32) || defined(__CYGWIN__) +# if KWSYS_STAT_HAS_ST_MTIM + // Compare using nanosecond resolution. + if(s1->st_mtim.tv_sec < s2->st_mtim.tv_sec) + { + return -1; + } + else if(s1->st_mtim.tv_sec > s2->st_mtim.tv_sec) + { + return 1; + } + else if(s1->st_mtim.tv_nsec < s2->st_mtim.tv_nsec) + { + return -1; + } + else if(s1->st_mtim.tv_nsec > s2->st_mtim.tv_nsec) + { + return 1; + } +# else + // Compare using 1 second resolution. + if(s1->st_mtime < s2->st_mtime) + { + return -1; + } + else if(s1->st_mtime > s2->st_mtime) + { + return 1; + } + return 0; +# endif +#else + return (int)CompareFileTime(s1, s2); +#endif +} + +bool cmFileTimeComparisonInternal::FileTimeCompare(const char* f1, const char* f2, int* result) +{ + // Default to same time. + *result = 0; + cmFileTimeComparison_Type s1; + if(!this->Stat(f1, &s1)) + { + return false; + } + cmFileTimeComparison_Type s2; + if(!this->Stat(f2, &s2)) + { + return false; + } + *result = this->Compare(&s1, &s2); + return true; +} + |