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ENH: Added FileTimeCompare method to compare file modification times. Currently the resolution is limited to one second.

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This commit is contained in:
Brad King 2004-10-15 09:23:14 -04:00
parent 4b20a7ad2d
commit b4176dcab9
2 changed files with 36 additions and 0 deletions
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30
Source/cmSystemTools.cxx
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@ -1317,3 +1317,33 @@ bool cmSystemTools::PutEnv(const char* value)
return ret == 0;
}
bool cmSystemTools::FileTimeCompare(const char* f1, const char* f2,
int* result)
{
struct stat stat1, stat2;
if(stat(f1, &stat1) == 0 && stat(f2, &stat2) == 0)
{
*result = 0;
if(stat1.st_mtime < stat2.st_mtime)
{
*result = -1;
}
else if(stat1.st_mtime > stat2.st_mtime)
{
*result = 1;
}
#if 0
// TODO: Support resolution higher than one second.
// Use st_mtim.tv_nsec if available and GetFileTime on Windows.
else if(stat1.st_mtim.tv_nsec < stat2.st_mtim.tv_nsec)
{
*result = 1;
}
#endif
return true;
}
else
{
return false;
}
}

6
Source/cmSystemTools.h
View File

@ -290,6 +290,12 @@ public:
of the form var=value */
static bool PutEnv(const char* value);
/** Compare file modification times.
Returns true for successful comparison and false for error.
When true is returned, result has -1, 0, +1 for
f1 older, same, or newer than f2. */
static bool FileTimeCompare(const char* f1, const char* f2,
int* result);
private:
static bool s_ForceUnixPaths;
static bool s_RunCommandHideConsole;