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103 lines
3.5 KiB
C
103 lines
3.5 KiB
C
/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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*
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* Copyright (c) 2014-2015 Datalight, Inc.
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* All Rights Reserved Worldwide.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; use version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but "AS-IS," WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Businesses and individuals that for commercial or other reasons cannot
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* comply with the terms of the GPLv2 license may obtain a commercial license
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* before incorporating Reliance Edge into proprietary software for
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* distribution in any form. Visit http://www.datalight.com/reliance-edge for
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* more information.
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*/
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/** @file
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* @brief Implements common-code utilities for tools and tests.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <limits.h>
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#include <redfs.h>
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#include <redcoreapi.h>
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#include <redvolume.h>
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#include <redtoolcmn.h>
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/** @brief Convert a string into a volume number.
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*
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* In a POSIX-like configuration, @p pszVolume can either be a volume number or
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* a volume path prefix. In case of ambiguity, the volume number of a matching
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* path prefix takes precedence.
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*
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* In an FSE configuration, @p pszVolume can be a volume number.
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*
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* @param pszVolume The volume string.
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*
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* @return On success, returns the volume number; on failure, returns
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#REDCONF_VOLUME_COUNT.
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*/
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uint8_t RedFindVolumeNumber( const char * pszVolume )
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{
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unsigned long ulNumber;
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const char * pszEndPtr;
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uint8_t bVolNum = REDCONF_VOLUME_COUNT;
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#if REDCONF_API_POSIX == 1
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uint8_t bIndex;
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#endif
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/* Determine if pszVolume can be interpreted as a volume number.
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*/
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errno = 0;
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ulNumber = strtoul( pszVolume, ( char ** ) &pszEndPtr, 10 );
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if( ( errno == 0 ) && ( ulNumber != ULONG_MAX ) && ( pszEndPtr[ 0U ] == '\0' ) && ( ulNumber < REDCONF_VOLUME_COUNT ) )
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{
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bVolNum = ( uint8_t ) ulNumber;
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}
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#if REDCONF_API_POSIX == 1
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/* Determine if pszVolume is a valid path prefix.
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*/
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for( bIndex = 0U; bIndex < REDCONF_VOLUME_COUNT; bIndex++ )
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{
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if( strcmp( gaRedVolConf[ bIndex ].pszPathPrefix, pszVolume ) == 0 )
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{
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break;
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}
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}
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if( bIndex < REDCONF_VOLUME_COUNT )
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{
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/* Edge case: It is technically possible for pszVolume to be both a
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* valid volume number and a valid volume prefix, for different
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* volumes. For example, if pszVolume is "2", that would be recognized
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* as volume number 2 above. But if "2" is the (poorly chosen) path
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* prefix for volume number 4, that would also be matched. Since the
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* POSIX-like API is primarily name based, and the ability to use
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* volume numbers with this tool is just a convenience, the volume
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* prefix takes precedence.
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*/
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bVolNum = bIndex;
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}
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#endif /* if REDCONF_API_POSIX == 1 */
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return bVolNum;
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}
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