1/*
2The contents of this file are subject to the Mozilla Public License
3Version 1.0 (the "License"); you may not use this file except in
4compliance with the License. You may obtain a copy of the License at
5http://www.mozilla.org/MPL/
6
7Software distributed under the License is distributed on an "AS IS"
8basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
9License for the specific language governing rights and limitations
10under the License.
11
12The Original Code is expat.
13
14The Initial Developer of the Original Code is James Clark.
15Portions created by James Clark are Copyright (C) 1998
16James Clark. All Rights Reserved.
17
18Contributor(s):
19*/
20
21#define STRICT 1
22#ifdef XML_UNICODE
23#define UNICODE
24#define _UNICODE
25#endif /* XML_UNICODE */
26#include <windows.h>
27#include <stdio.h>
28#include <tchar.h>
29#include "filemap.h"
30
31static void win32perror(const TCHAR *);
32
33int filemap(const TCHAR *name,
34	    void (*processor)(const void *, size_t, const TCHAR *, void *arg),
35	    void *arg)
36{
37  HANDLE f;
38  HANDLE m;
39  DWORD size;
40  DWORD sizeHi;
41  void *p;
42
43  f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
44			  FILE_FLAG_SEQUENTIAL_SCAN, NULL);
45  if (f == INVALID_HANDLE_VALUE) {
46    win32perror(name);
47    return 0;
48  }
49  size = GetFileSize(f, &sizeHi);
50  if (size == (DWORD)-1) {
51    win32perror(name);
52    return 0;
53  }
54  if (sizeHi) {
55    _ftprintf(stderr, _T("%s: bigger than 2Gb\n"), name);
56    return 0;
57  }
58  /* CreateFileMapping barfs on zero length files */
59  if (size == 0) {
60    static const char c = '\0';
61    processor(&c, 0, name, arg);
62    CloseHandle(f);
63    return 1;
64  }
65  m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
66  if (m == NULL) {
67    win32perror(name);
68    CloseHandle(f);
69    return 0;
70  }
71  p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
72  if (p == NULL) {
73    win32perror(name);
74    CloseHandle(m);
75    CloseHandle(f);
76    return 0;
77  }
78  processor(p, size, name, arg);
79  UnmapViewOfFile(p);
80  CloseHandle(m);
81  CloseHandle(f);
82  return 1;
83}
84
85static
86void win32perror(const TCHAR *s)
87{
88  LPVOID buf;
89  if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
90		    NULL,
91		    GetLastError(),
92		    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
93		    (LPTSTR) &buf,
94		    0,
95		    NULL)) {
96    _ftprintf(stderr, _T("%s: %s"), s, buf);
97    fflush(stderr);
98    LocalFree(buf);
99  }
100  else
101    _ftprintf(stderr, _T("%s: unknown Windows error\n"), s);
102}
103