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Add a helper funtion to the system path library to obtain the full path of a file.

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This commit is contained in:
Sandu Liviu Catalin 2016-06-18 20:27:51 +03:00
parent fe70560234
commit c8d5200dc0
2 changed files with 51 additions and 3 deletions
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49
source/Library/System/Path.cpp
View File

@ -4,8 +4,8 @@
// ------------------------------------------------------------------------------------------------
#include <cctype>
// ------------------------------------------------------------------------------------------------
#include <cstdlib>
#include <limits>
#include <utility>
// ------------------------------------------------------------------------------------------------
@ -14,7 +14,7 @@
#else
#include <linux/limits.h>
#include <unistd.h>
#endif
#endif // SQMOD_OS_WINDOWS
// ------------------------------------------------------------------------------------------------
namespace SqMod {
@ -32,6 +32,49 @@ namespace SqMod {
typedef CharT PChar;
#endif // SQMOD_OS_WINDOWS
// ------------------------------------------------------------------------------------------------
Buffer GetRealFilePath(CSStr path)
{
// Make sure the specified path is valid
if (!path || *path == '\0')
{
STHROWF("Cannot obtain real path of empty or invalid path");
}
// Allocate a buffer large enough to hold a full path
Buffer b(SQMOD_MAX_PATH);
#ifdef SQMOD_OS_WINDOWS
// Attempt to obtain the full path to the file
DWORD ret = ::GetFullPathName(path, b.Size< PChar >(), b.Get< PChar >(), nullptr);
// Should we allocate a bigger buffer?
if (ret > b.Size< PChar >())
{
// Grab a bigger buffer
b.Adjust(ret);
// Grab the path again
ret = GetFullPathName(path, b.Size< PChar >(), b.Get< PChar >(), nullptr);
}
// Did we fail to obtain a path?
if (ret == 0 && ::GetLastError() != 0)
{
STHROWLASTF("Cannot obtain real path of (%s)", path);
}
// Adjust the buffer cursor
b.Move(ret);
#else
// Attempt to obtain the full path to the file
if (!realpath(path, b.Data()))
{
STHROWLASTF("Cannot obtain real path of (%s)", path);
}
// Adjust the buffer cursor
b.Move(std::strlen(b.Data()));
#endif // SQMOD_OS_WINDOWS
// Return ownership of the buffer
return std::move(b);
}
// ------------------------------------------------------------------------------------------------
SQInteger SysPath::Typename(HSQUIRRELVM vm)
{

5
source/Library/System/Path.hpp
View File

@ -10,6 +10,11 @@
// ------------------------------------------------------------------------------------------------
namespace SqMod {
/* ------------------------------------------------------------------------------------------------
* Retrieve the full path of file.
*/
Buffer GetRealFilePath(CSStr path);
/* ------------------------------------------------------------------------------------------------
* This class represents filesystem paths in a platform-independent manner.
*/