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