51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
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#define STRICT 1
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#include <windows.h>
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#include <stdio.h>
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#include "filemap.h"
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int filemap(const char *name,
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void (*processor)(const void *, size_t, const char *, 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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fprintf(stderr, "%s: CreateFile failed\n", name);
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return 0;
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}
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size = GetFileSize(f, &sizeHi);
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if (sizeHi) {
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fprintf(stderr, "%s: too big (limit 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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fprintf(stderr, "%s: zero-length file\n", name);
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return 0;
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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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fprintf(stderr, "%s: CreateFileMapping failed\n", 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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CloseHandle(m);
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CloseHandle(f);
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fprintf(stderr, "%s: MapViewOfFile failed\n", name);
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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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