1/*
2                            __  __            _
3                         ___\ \/ /_ __   __ _| |_
4                        / _ \\  /| '_ \ / _` | __|
5                       |  __//  \| |_) | (_| | |_
6                        \___/_/\_\ .__/ \__,_|\__|
7                                 |_| XML parser
8
9   Copyright (c) 1997-2000 Thai Open Source Software Center Ltd
10   Copyright (c) 2000-2017 Expat development team
11   Licensed under the MIT license:
12
13   Permission is  hereby granted,  free of charge,  to any  person obtaining
14   a  copy  of  this  software   and  associated  documentation  files  (the
15   "Software"),  to  deal in  the  Software  without restriction,  including
16   without  limitation the  rights  to use,  copy,  modify, merge,  publish,
17   distribute, sublicense, and/or sell copies of the Software, and to permit
18   persons  to whom  the Software  is  furnished to  do so,  subject to  the
19   following conditions:
20
21   The above copyright  notice and this permission notice  shall be included
22   in all copies or substantial portions of the Software.
23
24   THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
25   EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
26   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
27   NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
28   DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
29   OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
30   USE OR OTHER DEALINGS IN THE SOFTWARE.
31*/
32
33#define STRICT 1
34#define WIN32_LEAN_AND_MEAN 1
35
36#ifdef XML_UNICODE_WCHAR_T
37#  ifndef XML_UNICODE
38#    define XML_UNICODE
39#  endif
40#endif
41
42#ifdef XML_UNICODE
43#  define UNICODE
44#  define _UNICODE
45#endif /* XML_UNICODE */
46#include <windows.h>
47#include <stdio.h>
48#include <tchar.h>
49#include "filemap.h"
50
51static void win32perror(const TCHAR *);
52
53int
54filemap(const TCHAR *name,
55        void (*processor)(const void *, size_t, const TCHAR *, void *arg),
56        void *arg) {
57  HANDLE f;
58  HANDLE m;
59  DWORD size;
60  DWORD sizeHi;
61  void *p;
62
63  f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
64                 FILE_FLAG_SEQUENTIAL_SCAN, NULL);
65  if (f == INVALID_HANDLE_VALUE) {
66    win32perror(name);
67    return 0;
68  }
69  size = GetFileSize(f, &sizeHi);
70  if (size == (DWORD)-1) {
71    win32perror(name);
72    CloseHandle(f);
73    return 0;
74  }
75  if (sizeHi || (size > XML_MAX_CHUNK_LEN)) {
76    CloseHandle(f);
77    return 2; /* Cannot be passed to XML_Parse in one go */
78  }
79  /* CreateFileMapping barfs on zero length files */
80  if (size == 0) {
81    static const char c = '\0';
82    processor(&c, 0, name, arg);
83    CloseHandle(f);
84    return 1;
85  }
86  m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
87  if (m == NULL) {
88    win32perror(name);
89    CloseHandle(f);
90    return 0;
91  }
92  p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
93  if (p == NULL) {
94    win32perror(name);
95    CloseHandle(m);
96    CloseHandle(f);
97    return 0;
98  }
99  processor(p, size, name, arg);
100  UnmapViewOfFile(p);
101  CloseHandle(m);
102  CloseHandle(f);
103  return 1;
104}
105
106static void
107win32perror(const TCHAR *s) {
108  LPVOID buf;
109  if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
110                    NULL, GetLastError(),
111                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buf, 0,
112                    NULL)) {
113    _ftprintf(stderr, _T("%s: %s"), s, buf);
114    fflush(stderr);
115    LocalFree(buf);
116  } else
117    _ftprintf(stderr, _T("%s: unknown Windows error\n"), s);
118}
119