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diff --git a/intl/icu/source/tools/toolutil/filestrm.h b/intl/icu/source/tools/toolutil/filestrm.h
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+******************************************************************************
+*
+* Copyright (C) 1997-2005, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+******************************************************************************
+*
+* File FILESTRM.H
+*
+* Contains FileStream interface
+*
+* @author Glenn Marcy
+*
+* Modification History:
+*
+* Date Name Description
+* 5/8/98 gm Created.
+* 03/02/99 stephen Reordered params in ungetc to match stdio
+* Added wopen
+*
+******************************************************************************
+*/
+
+#ifndef FILESTRM_H
+#define FILESTRM_H
+
+#include "unicode/utypes.h"
+
+typedef struct _FileStream FileStream;
+
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_open(const char* filename, const char* mode);
+
+/*
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_wopen(const wchar_t* filename, const wchar_t* mode);
+*/
+U_CAPI void U_EXPORT2
+T_FileStream_close(FileStream* fileStream);
+
+U_CAPI UBool U_EXPORT2
+T_FileStream_file_exists(const char* filename);
+
+/*
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_tmpfile(void);
+*/
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_read(FileStream* fileStream, void* addr, int32_t len);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_write(FileStream* fileStream, const void* addr, int32_t len);
+
+U_CAPI void U_EXPORT2
+T_FileStream_rewind(FileStream* fileStream);
+
+/*Added by Bertrand A. D. */
+U_CAPI char * U_EXPORT2
+T_FileStream_readLine(FileStream* fileStream, char* buffer, int32_t length);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_writeLine(FileStream* fileStream, const char* buffer);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_putc(FileStream* fileStream, int32_t ch);
+
+U_CAPI int U_EXPORT2
+T_FileStream_getc(FileStream* fileStream);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_ungetc(int32_t ch, FileStream *fileStream);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_peek(FileStream* fileStream);
+
+U_CAPI int32_t U_EXPORT2
+T_FileStream_size(FileStream* fileStream);
+
+U_CAPI int U_EXPORT2
+T_FileStream_eof(FileStream* fileStream);
+
+U_CAPI int U_EXPORT2
+T_FileStream_error(FileStream* fileStream);
+
+/*
+U_CAPI void U_EXPORT2
+T_FileStream_setError(FileStream* fileStream);
+*/
+
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_stdin(void);
+
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_stdout(void);
+
+U_CAPI FileStream* U_EXPORT2
+T_FileStream_stderr(void);
+
+U_CAPI UBool U_EXPORT2
+T_FileStream_remove(const char* fileName);
+
+#endif /* _FILESTRM*/