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Diffstat (limited to '3rdParty/Boost/src/libs/filesystem/src/unique_path.cpp')
-rw-r--r--3rdParty/Boost/src/libs/filesystem/src/unique_path.cpp142
1 files changed, 142 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/libs/filesystem/src/unique_path.cpp b/3rdParty/Boost/src/libs/filesystem/src/unique_path.cpp
new file mode 100644
index 0000000..c25c315
--- /dev/null
+++ b/3rdParty/Boost/src/libs/filesystem/src/unique_path.cpp
@@ -0,0 +1,142 @@
+// filesystem unique_path.cpp --------------------------------------------------------//
+
+// Copyright Beman Dawes 2010
+
+// Distributed under the Boost Software License, Version 1.0.
+// See http://www.boost.org/LICENSE_1_0.txt
+
+// Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------//
+
+// define BOOST_FILESYSTEM_SOURCE so that <boost/filesystem/config.hpp> knows
+// the library is being built (possibly exporting rather than importing code)
+#define BOOST_FILESYSTEM_SOURCE
+
+#ifndef BOOST_SYSTEM_NO_DEPRECATED
+# define BOOST_SYSTEM_NO_DEPRECATED
+#endif
+
+#include <boost/filesystem/operations.hpp>
+
+# ifdef BOOST_POSIX_API
+# include <fcntl.h>
+# else // BOOST_WINDOWS_API
+# include <windows.h>
+# include <wincrypt.h>
+# pragma comment(lib, "Advapi32.lib")
+# endif
+
+namespace {
+
+void fail(int err, boost::system::error_code* ec)
+{
+ if (ec == 0)
+ BOOST_FILESYSTEM_THROW( boost::system::system_error(err,
+ boost::system::system_category(),
+ "boost::filesystem::unique_path"));
+
+ ec->assign(err, boost::system::system_category());
+ return;
+}
+
+void system_crypt_random(void* buf, std::size_t len, boost::system::error_code* ec)
+{
+# ifdef BOOST_POSIX_API
+
+ int file = open("/dev/urandom", O_RDONLY);
+ if (file == -1)
+ {
+ file = open("/dev/random", O_RDONLY);
+ if (file == -1)
+ {
+ fail(errno, ec);
+ return;
+ }
+ }
+
+ size_t bytes_read = 0;
+ while (bytes_read < len)
+ {
+ ssize_t n = read(file, buf, len - bytes_read);
+ if (n == -1)
+ {
+ close(file);
+ fail(errno, ec);
+ return;
+ }
+ bytes_read += n;
+ buf = static_cast<char*>(buf) + n;
+ }
+
+ close(file);
+
+# else // BOOST_WINDOWS_API
+
+ HCRYPTPROV handle;
+ int errval = 0;
+
+ if (!::CryptAcquireContextW(&handle, 0, 0, PROV_RSA_FULL, 0))
+ {
+ errval = ::GetLastError();
+ if (errval == NTE_BAD_KEYSET)
+ {
+ if (!::CryptAcquireContextW(&handle, 0, 0, PROV_RSA_FULL, CRYPT_NEWKEYSET))
+ {
+ errval = ::GetLastError();
+ }
+ else errval = 0;
+ }
+ }
+
+ if (!errval)
+ {
+ BOOL gen_ok = ::CryptGenRandom(handle, len, static_cast<unsigned char*>(buf));
+ if (!gen_ok)
+ errval = ::GetLastError();
+ ::CryptReleaseContext(handle, 0);
+ }
+
+ if (!errval) return;
+
+ fail(errval, ec);
+# endif
+}
+
+} // unnamed namespace
+
+namespace boost { namespace filesystem { namespace detail {
+
+BOOST_FILESYSTEM_DECL
+path unique_path(const path& model, system::error_code* ec)
+{
+ std::wstring s (model.wstring()); // std::string ng for MBCS encoded POSIX
+ const wchar_t hex[] = L"0123456789abcdef";
+ const int n_ran = 16;
+ const int max_nibbles = 2 * n_ran; // 4-bits per nibble
+ char ran[n_ran];
+
+ int nibbles_used = max_nibbles;
+ for(std::wstring::size_type i=0; i < s.size(); ++i)
+ {
+ if (s[i] == L'%') // digit request
+ {
+ if (nibbles_used == max_nibbles)
+ {
+ system_crypt_random(ran, sizeof(ran), ec);
+ if (ec != 0 && *ec)
+ return "";
+ nibbles_used = 0;
+ }
+ int c = ran[nibbles_used/2];
+ c >>= 4 * (nibbles_used++ & 1); // if odd, shift right 1 nibble
+ s[i] = hex[c & 0xf]; // convert to hex digit and replace
+ }
+ }
+
+ if (ec != 0) ec->clear();
+
+ return s;
+}
+
+}}}