1  /*
       2                              __  __            _
       3                           ___\ \/ /_ __   __ _| |_
       4                          / _ \\  /| '_ \ / _` | __|
       5                         |  __//  \| |_) | (_| | |_
       6                          \___/_/\_\ .__/ \__,_|\__|
       7                                   |_| XML parser
       8  
       9     Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
      10     Copyright (c) 2000      Clark Cooper <coopercc@users.sourceforge.net>
      11     Copyright (c) 2002      Fred L. Drake, Jr. <fdrake@users.sourceforge.net>
      12     Copyright (c) 2016-2022 Sebastian Pipping <sebastian@pipping.org>
      13     Copyright (c) 2022      Martin Ettl <ettl.martin78@googlemail.com>
      14     Licensed under the MIT license:
      15  
      16     Permission is  hereby granted,  free of charge,  to any  person obtaining
      17     a  copy  of  this  software   and  associated  documentation  files  (the
      18     "Software"),  to  deal in  the  Software  without restriction,  including
      19     without  limitation the  rights  to use,  copy,  modify, merge,  publish,
      20     distribute, sublicense, and/or sell copies of the Software, and to permit
      21     persons  to whom  the Software  is  furnished to  do so,  subject to  the
      22     following conditions:
      23  
      24     The above copyright  notice and this permission notice  shall be included
      25     in all copies or substantial portions of the Software.
      26  
      27     THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
      28     EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
      29     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
      30     NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
      31     DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
      32     OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
      33     USE OR OTHER DEALINGS IN THE SOFTWARE.
      34  */
      35  
      36  #define STRICT 1
      37  #define WIN32_LEAN_AND_MEAN 1
      38  
      39  #ifdef XML_UNICODE_WCHAR_T
      40  #  ifndef XML_UNICODE
      41  #    define XML_UNICODE
      42  #  endif
      43  #endif
      44  
      45  #ifdef XML_UNICODE
      46  #  define UNICODE
      47  #  define _UNICODE
      48  #endif /* XML_UNICODE */
      49  #include <windows.h>
      50  #include <stdio.h>
      51  #include <tchar.h>
      52  #include "filemap.h"
      53  
      54  static void win32perror(const TCHAR *);
      55  
      56  int
      57  filemap(const TCHAR *name,
      58          void (*processor)(const void *, size_t, const TCHAR *, void *arg),
      59          void *arg) {
      60    HANDLE f;
      61    HANDLE m;
      62    DWORD size;
      63    DWORD sizeHi;
      64    void *p;
      65  
      66    f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
      67                   FILE_FLAG_SEQUENTIAL_SCAN, NULL);
      68    if (f == INVALID_HANDLE_VALUE) {
      69      win32perror(name);
      70      return 0;
      71    }
      72    size = GetFileSize(f, &sizeHi);
      73    if (size == (DWORD)-1) {
      74      win32perror(name);
      75      CloseHandle(f);
      76      return 0;
      77    }
      78    if (sizeHi || (size > XML_MAX_CHUNK_LEN)) {
      79      CloseHandle(f);
      80      return 2; /* Cannot be passed to XML_Parse in one go */
      81    }
      82    /* CreateFileMapping barfs on zero length files */
      83    if (size == 0) {
      84      static const char c = '\0';
      85      processor(&c, 0, name, arg);
      86      CloseHandle(f);
      87      return 1;
      88    }
      89    m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
      90    if (m == NULL) {
      91      win32perror(name);
      92      CloseHandle(f);
      93      return 0;
      94    }
      95    p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
      96    if (p == NULL) {
      97      win32perror(name);
      98      CloseHandle(m);
      99      CloseHandle(f);
     100      return 0;
     101    }
     102    processor(p, size, name, arg);
     103    UnmapViewOfFile(p);
     104    CloseHandle(m);
     105    CloseHandle(f);
     106    return 1;
     107  }
     108  
     109  static void
     110  win32perror(const TCHAR *s) {
     111    LPVOID buf = NULL;
     112    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
     113                      NULL, GetLastError(),
     114                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, 0,
     115                      NULL)) {
     116      _ftprintf(stderr, _T("%s: %s"), s, buf);
     117      fflush(stderr);
     118      LocalFree(buf);
     119    } else
     120      _ftprintf(stderr, _T("%s: unknown Windows error\n"), s);
     121  }