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-/* In files.c */
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-char *FileName(const char *dirname,const char *prefix, const char *name);
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-void *MapFile(const char *filename);
-void *UnmapFile(const char *filename);
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-int OpenFile(const char *filename);
-int AppendFile(const char *filename);
-int ReOpenFile(const char *filename);
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-int WriteFile(int fd,const void *address,size_t length);
-int ReadFile(int fd,void *address,size_t length);
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-off_t SizeFile(const char *filename);
-int ExistsFile(const char *filename);
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-int SeekFile(int fd,off_t position);
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-void CloseFile(int fd);
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-int DeleteFile(char *filename);