100 lines
3.5 KiB
C
100 lines
3.5 KiB
C
/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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Copyright (c) 2014-2015 Datalight, Inc.
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All Rights Reserved Worldwide.
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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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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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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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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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In an FSE configuration, @p pszVolume can be a volume number.
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@param pszVolume The volume string.
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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(
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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
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return bVolNum;
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}
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