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) 2016-2017 Sebastian Pipping <sebastian@pipping.org>
13   Licensed under the MIT license:
14
15   Permission is  hereby granted,  free of charge,  to any  person obtaining
16   a  copy  of  this  software   and  associated  documentation  files  (the
17   "Software"),  to  deal in  the  Software  without restriction,  including
18   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
19   distribute, sublicense, and/or sell copies of the Software, and to permit
20   persons  to whom  the Software  is  furnished to  do so,  subject to  the
21   following conditions:
22
23   The above copyright  notice and this permission notice  shall be included
24   in all copies or substantial portions of the Software.
25
26   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
27   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
28   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
29   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
30   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
31   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
32   USE OR OTHER DEALINGS IN THE SOFTWARE.
33*/
34
35#define STRICT 1
36#define WIN32_LEAN_AND_MEAN 1
37
38#ifdef XML_UNICODE_WCHAR_T
39#  ifndef XML_UNICODE
40#    define XML_UNICODE
41#  endif
42#endif
43
44#ifdef XML_UNICODE
45#  define UNICODE
46#  define _UNICODE
47#endif /* XML_UNICODE */
48#include <windows.h>
49#include <stdio.h>
50#include <tchar.h>
51#include "filemap.h"
52
53static void win32perror(const TCHAR *);
54
55int
56filemap(const TCHAR *name,
57        void (*processor)(const void *, size_t, const TCHAR *, void *arg),
58        void *arg) {
59  HANDLE f;
60  HANDLE m;
61  DWORD size;
62  DWORD sizeHi;
63  void *p;
64
65  f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
66                 FILE_FLAG_SEQUENTIAL_SCAN, NULL);
67  if (f == INVALID_HANDLE_VALUE) {
68    win32perror(name);
69    return 0;
70  }
71  size = GetFileSize(f, &sizeHi);
72  if (size == (DWORD)-1) {
73    win32perror(name);
74    CloseHandle(f);
75    return 0;
76  }
77  if (sizeHi || (size > XML_MAX_CHUNK_LEN)) {
78    CloseHandle(f);
79    return 2; /* Cannot be passed to XML_Parse in one go */
80  }
81  /* CreateFileMapping barfs on zero length files */
82  if (size == 0) {
83    static const char c = '\0';
84    processor(&c, 0, name, arg);
85    CloseHandle(f);
86    return 1;
87  }
88  m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
89  if (m == NULL) {
90    win32perror(name);
91    CloseHandle(f);
92    return 0;
93  }
94  p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
95  if (p == NULL) {
96    win32perror(name);
97    CloseHandle(m);
98    CloseHandle(f);
99    return 0;
100  }
101  processor(p, size, name, arg);
102  UnmapViewOfFile(p);
103  CloseHandle(m);
104  CloseHandle(f);
105  return 1;
106}
107
108static void
109win32perror(const TCHAR *s) {
110  LPVOID buf;
111  if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
112                    NULL, GetLastError(),
113                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, 0,
114                    NULL)) {
115    _ftprintf(stderr, _T("%s: %s"), s, buf);
116    fflush(stderr);
117    LocalFree(buf);
118  } else
119    _ftprintf(stderr, _T("%s: unknown Windows error\n"), s);
120}
121