author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 11 May 2010 17:47:24 +0300 | |
branch | RCL_3 |
changeset 25 | 7701629b34a6 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* FUNCTION |
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* <<fgetpos>>---record position in a stream or file |
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* INDEX |
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* fgetpos |
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* ANSI_SYNOPSIS |
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* #include <stdio.h> |
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* int fgetpos(FILE *<[fp]>, fpos_t *<[pos]>); |
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* TRAD_SYNOPSIS |
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* #include <stdio.h> |
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* int fgetpos(<[fp]>, <[pos]>) |
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* FILE *<[fp]>; |
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* fpos_t *<[pos]>; |
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* Objects of type <<FILE>> can have a ``position'' that records how much |
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* of the file your program has already read. Many of the <<stdio>> functions |
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* depend on this position, and many change it as a side effect. |
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* You can use <<fgetpos>> to report on the current position for a file |
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* identified by <[fp]>; <<fgetpos>> will write a value |
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* representing that position at <<*<[pos]>>>. Later, you can |
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* use this value with <<fsetpos>> to return the file to this |
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* position. |
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* In the current implementation, <<fgetpos>> simply uses a character |
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* count to represent the file position; this is the same number that |
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* would be returned by <<ftell>>. |
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* RETURNS |
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* <<fgetpos>> returns <<0>> when successful. If <<fgetpos>> fails, the |
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* result is <<1>>. Failure occurs on streams that do not support |
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* positioning; the global <<errno>> indicates this condition with the |
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* value <<ESPIPE>>. |
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* PORTABILITY |
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* <<fgetpos>> is required by the ANSI C standard, but the meaning of the |
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* value it records is not specified beyond requiring that it be |
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* acceptable as an argument to <<fsetpos>>. In particular, other |
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* conforming C implementations may return a different result from |
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* <<ftell>> than what <<fgetpos>> writes at <<*<[pos]>>>. |
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* No supporting OS subroutines are required. |
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* |
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* |
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*/ |
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|
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#include <stdio.h> |
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/** |
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Get position in a stream. |
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@return 0 value indicates success. non-zero value indicates error. |
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@param fp pointer to an open file. |
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@param pos pointer to a fpos_t object where the position will be stored. |
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*/ |
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EXPORT_C int |
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fgetpos (FILE * fp, fpos_t * pos) |
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{ |
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*pos = ftell (fp); |
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if (*pos != -1) |
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return 0; |
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return 1; |
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} |