VPatch 3.0

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4271 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/VPatch/Source/GenPat/POSIXUtil.cpp

@@ -0,0 +1,128 @@
+//---------------------------------------------------------------------------
+// POSIXUtil.cpp
+//---------------------------------------------------------------------------
+//                           -=* VPatch *=-
+//---------------------------------------------------------------------------
+// Copyright (C) 2001-2005 Koen van de Sande / Van de Sande Productions
+//---------------------------------------------------------------------------
+// Website: http://www.tibed.net/vpatch
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+
+
+#include "POSIXUtil.h"
+#include <iostream>
+#include <fstream>
+
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/* My Borland/VC++ compiler do not have this file */
+#if !defined(__BORLANDC__) && !defined(_MSC_VER)
+  #include <unistd.h>
+#endif
+
+#ifdef __WIN32__     /* The Windows way of getting a temp file needs windows.h*/
+  #include <windows.h>
+#endif
+
+using namespace std;
+
+namespace POSIX {
+
+  void TimeT_To_FILETIME(time_t t, ALT_FILETIME *pft ) {
+      uint64_t ll = (((uint64_t)t) *10000000L) + (((uint64_t)116444736L) * 1000000000L);
+      pft->dwLowDateTime = (uint32_t)(ll & 0xFFFFFFFF);
+      pft->dwHighDateTime = (uint32_t)((ll>>32)&0xFFFFFFFF);
+  }
+
+#ifdef __WIN32__
+  /* do it the old way on Win32, because POSIX does not get timezone stuff right */
+  ALT_FILETIME getFileTime(const char* sFileName) {
+    FILETIME temp;
+    GetSystemTimeAsFileTime(&temp);
+    HANDLE h = CreateFile(sFileName, GENERIC_READ, FILE_SHARE_READ, NULL,
+                            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
+    if (h == INVALID_HANDLE_VALUE) {
+      cerr << "Cannot read file time of " << sFileName << "\n";
+    } else {
+      GetFileTime(h, NULL, NULL, &temp);
+      CloseHandle(h);
+    }
+    ALT_FILETIME result;
+    result.dwHighDateTime = temp.dwHighDateTime;
+    result.dwLowDateTime = temp.dwLowDateTime;
+    return result;
+  }
+#else
+  ALT_FILETIME getFileTime(const char* sFileName) {
+    struct stat buf;
+    /* get current time first as a fall-back */
+    time_t currentTime = time(NULL);
+
+    if(stat(sFileName, &buf)) {
+      cerr << "Cannot read file time of " << sFileName << "\n";
+    } else {
+      /* get the time from the file */
+      currentTime = buf.st_mtime;
+    }
+    ALT_FILETIME result;
+    TimeT_To_FILETIME(currentTime, &result);
+    return result;
+  }
+#endif
+
+  uint32_t getFileSize(const char* sFileName) {
+    std::ifstream f;
+    f.open(sFileName, std::ios_base::binary | std::ios_base::in);
+    if (!f.good() || f.eof() || !f.is_open()) {
+      throw "File could not be read (getFileSize)";
+    }
+    f.seekg(0, std::ios_base::beg);
+    std::ifstream::pos_type begin_pos = f.tellg();
+    f.seekg(0, std::ios_base::end);
+    return static_cast<int>(f.tellg() - begin_pos);
+  }
+
+#ifdef __WIN32__
+  string getTempFile() {
+    char buffer[MAX_PATH];
+    if(GetTempFileName(".","vpatch",0,buffer) == 0) {
+      cerr << "Cannot create temporary filename";
+    }
+    return string(buffer);
+  }
+#else
+//#ifdef POSIX
+  // This is a POSIX version of the function, together with #include <stdio.h>
+  // but I will not add it in a final release version.
+  string getTempFile() {
+    char filebuf [L_tmpnam];
+
+    // create a temporary filename
+    const char *fname = tmpnam (filebuf);
+
+    if (!fname)
+      cerr << "Cannot create temporary filename";
+
+    return string(fname);
+  }
+//#endif
+#endif
+
+}