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/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#define STRICT 1
#define WIN32_LEAN_AND_MEAN 1
#ifdef XML_UNICODE_WCHAR_T
#ifndef XML_UNICODE
#define XML_UNICODE
#endif
#endif
#ifdef XML_UNICODE
#define UNICODE
#define _UNICODE
#endif /* XML_UNICODE */
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include "filemap.h"
static void win32perror(const TCHAR *);
int
filemap(const TCHAR *name,
void (*processor)(const void *, size_t, const TCHAR *, void *arg),
void *arg)
{
HANDLE f;
HANDLE m;
DWORD size;
DWORD sizeHi;
void *p;
f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if (f == INVALID_HANDLE_VALUE) {
win32perror(name);
return 0;
}
size = GetFileSize(f, &sizeHi);
if (size == (DWORD)-1) {
win32perror(name);
return 0;
}
if (sizeHi) {
_ftprintf(stderr, _T("%s: bigger than 2Gb\n"), name);
return 0;
}
/* CreateFileMapping barfs on zero length files */
if (size == 0) {
static const char c = '\0';
processor(&c, 0, name, arg);
CloseHandle(f);
return 1;
}
m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
if (m == NULL) {
win32perror(name);
CloseHandle(f);
return 0;
}
p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
if (p == NULL) {
win32perror(name);
CloseHandle(m);
CloseHandle(f);
return 0;
}
processor(p, size, name, arg);
UnmapViewOfFile(p);
CloseHandle(m);
CloseHandle(f);
return 1;
}
static void
win32perror(const TCHAR *s)
{
LPVOID buf;
if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER
| FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &buf,
0,
NULL)) {
_ftprintf(stderr, _T("%s: %s"), s, buf);
fflush(stderr);
LocalFree(buf);
}
else
_ftprintf(stderr, _T("%s: unknown Windows error\n"), s);
}
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