mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/* path.c - Path handling routines */
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/*
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* Copyright © 2014 Pete Batard <pete@akeo.ie>
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* Based on path sanitation code by Ludwig Nussel <ludwig.nussel@suse.de>
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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, either version 3 of the License, or
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* (at your option) any later version.
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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 WITHOUT ANY WARRANTY; without even the implied warranty of
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* 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "driver.h"
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/* copy src into dest converting the path to a relative one inside the current
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* directory. dest must hold at least len bytes
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*/
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#ifndef PATH_CHAR
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#define PATH_CHAR '/'
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#endif
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VOID CopyPathRelative(CHAR8 *dest, CHAR8 *src, INTN len)
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{
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CHAR8* o = dest;
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CHAR8* p = src;
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*o = '\0';
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while(*p && *p == PATH_CHAR) ++p;
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for(; len && *p;)
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{
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src = p;
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p = strchra(src, PATH_CHAR);
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if(!p) p = src+strlena(src);
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/* . => skip */
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if(p-src == 1 && *src == '.' )
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{
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if(*p) src = ++p;
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}
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/* .. => pop one */
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else if(p-src == 2 && *src == '.' && src[1] == '.')
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{
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if(o != dest)
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{
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CHAR8* tmp;
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*o = '\0';
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tmp = strrchra(dest, PATH_CHAR);
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if(!tmp)
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{
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len += o-dest;
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o = dest;
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if(*p) ++p;
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}
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else
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{
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len += o-tmp;
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o = tmp;
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if(*p) ++p;
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}
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}
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else /* nothing to pop */
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if(*p) ++p;
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}
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else
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{
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INTN copy;
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if(o != dest)
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{
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--len;
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*o++ = PATH_CHAR;
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}
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copy = MIN(p-src,len);
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CopyMem(o, src, copy);
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len -= copy;
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src += copy;
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o += copy;
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if(*p) ++p;
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}
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while(*p && *p == PATH_CHAR) ++p;
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}
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o[len?0:-1] = '\0';
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}
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