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Diffstat (limited to 'dwarfdump2/strstrnocase.cc')
-rwxr-xr-x | dwarfdump2/strstrnocase.cc | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/dwarfdump2/strstrnocase.cc b/dwarfdump2/strstrnocase.cc new file mode 100755 index 0000000..7d68ba9 --- /dev/null +++ b/dwarfdump2/strstrnocase.cc @@ -0,0 +1,115 @@ +/* + Copyright (C) 2009-2011 David Anderson. All Rights Reserved. + + This program is free software; you can redistribute it and/or modify it + under the terms of version 2 of the GNU General Public License as + published by the Free Software Foundation. + + This program is distributed in the hope that it would be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + + Further, this software is distributed without any warranty that it is + free of the rightful claim of any third person regarding infringement + or the like. Any license provided herein, whether implied or + otherwise, applies only to this software file. Patent licenses, if + any, provided herein do not apply to combinations of this program with + other software, or any other product whatsoever. + + You should have received a copy of the GNU General Public License along + with this program; if not, write the Free Software Foundation, Inc., 51 + Franklin Street - Fifth Floor, Boston MA 02110-1301, USA. + + Contact information: Silicon Graphics, Inc., 1500 Crittenden Lane, + Mountain View, CA 94043, or: + + http://www.sgi.com + + For further information regarding this notice, see: + + http://oss.sgi.com/projects/GenInfo/NoticeExplan + +*/ +/* The address of the Free Software Foundation is + Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + + + +/* +This tries to find the string 'contained' in the +string 'container'. it returns true if found, else false. +The comparisons are independent of case. + +Regrettably there is no generally accepted version that +does this job, though GNU Linux has strcasestr() which +does what we need. + +There is a public domain stristr(). But given that dwarfdump is GPL, +it would seem (IANAL) that we cannot mix public domain code +into the release. + +The software here is independently written and indeed trivial. + +The POSIX function tolower() is only properly defined on unsigned char, hence +the ugly casts. + +strstrnocase.cc + +*/ +#include <ctype.h> +#include <stdio.h> +#include <globals.h> + +bool +is_strstrnocase(const char * container, const char * contained) +{ + const unsigned char *ct = (const unsigned char *)container; + for( ; *ct; ++ct ) + { + const unsigned char * cntnd = (const unsigned char *)contained; + bool innerwrong = true; + for( ; *cntnd; ++cntnd,++ct) + { + unsigned char lct = tolower(*ct); + unsigned char tlc = tolower(*cntnd); + if(lct != tlc) { + innerwrong=true; + break; /* Go to outer loop */ + } + innerwrong=false; + } + if(!innerwrong) { + return true; + } + } + return false; +} + +#ifdef TEST +static void +test(const char *t1, const char *t2,int resexp) +{ + bool res = is_strstrnocase(t1,t2); + if (res == resexp) { + return; + } + printf("Error,mismatch %s and %s. Expected %d got %d\n", + t1,t2,resexp,res); +} + +int main() +{ + test("aaaaa","a",1); + test("aaaaa","b",0); + test("abaaba","ba",1); + test("abaabA","Ba",1); + test("a","ab",0); + test("b","c",0); + test("b","",0); + test("","c",0); + test("","",0); + test("aaaaa","aaaaaaaa",0); +} +#endif |