diff options
Diffstat (limited to 'src/lib9/cleanname.c')
| -rw-r--r-- | src/lib9/cleanname.c | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/src/lib9/cleanname.c b/src/lib9/cleanname.c deleted file mode 100644 index fee40388f..000000000 --- a/src/lib9/cleanname.c +++ /dev/null @@ -1,78 +0,0 @@ -/* -Inferno libkern/cleanname.c -http://code.google.com/p/inferno-os/source/browse/libkern/cleanname.c - - Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved. - Revisions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com). All rights reserved. - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -THE SOFTWARE. -*/ - -#include <u.h> -#include <libc.h> - -/* - * In place, rewrite name to compress multiple /, eliminate ., and process .. - */ -#define SEP(x) ((x)=='/' || (x) == 0) -char* -cleanname(char *name) -{ - char *p, *q, *dotdot; - int rooted; - - rooted = name[0] == '/'; - - /* - * invariants: - * p points at beginning of path element we're considering. - * q points just past the last path element we wrote (no slash). - * dotdot points just past the point where .. cannot backtrack - * any further (no slash). - */ - p = q = dotdot = name+rooted; - while(*p) { - if(p[0] == '/') /* null element */ - p++; - else if(p[0] == '.' && SEP(p[1])) - p += 1; /* don't count the separator in case it is nul */ - else if(p[0] == '.' && p[1] == '.' && SEP(p[2])) { - p += 2; - if(q > dotdot) { /* can backtrack */ - while(--q > dotdot && *q != '/') - ; - } else if(!rooted) { /* /.. is / but ./../ is .. */ - if(q != name) - *q++ = '/'; - *q++ = '.'; - *q++ = '.'; - dotdot = q; - } - } else { /* real path element */ - if(q != name+rooted) - *q++ = '/'; - while((*q = *p) != '/' && *q != 0) - p++, q++; - } - } - if(q == name) /* empty string is really ``.'' */ - *q++ = '.'; - *q = '\0'; - return name; -} |
