fix problematic use of tolower() when calculating the version

hash by using locale independant tolower_ascii() function. 
Thanks to M. Vefa Bicakci (LP: #80248)

2 files changed, 12 insertions, 0 deletions

diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index 327381d03..0b1bc3c98 100644
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -1074,6 +1074,17 @@ char *safe_snprintf(char *Buffer,char *End,const char *Format,...)
 }
 									/*}}}*/
 
+// tolower_ascii - tolower() function that ignores the locale		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+int tolower_ascii(int c)
+{
+   if (c >= 'A' and c <= 'Z')
+      return c + 32;
+   return c;
+}
+									/*}}}*/
+
 // CheckDomainList - See if Host is in a , seperate list		/*{{{*/
 // ---------------------------------------------------------------------
 /* The domain list is a comma seperate list of domains that are suffix
diff --git a/apt-pkg/contrib/strutl.h b/apt-pkg/contrib/strutl.h
index d9972abf4..51416a24a 100644
--- a/apt-pkg/contrib/strutl.h
+++ b/apt-pkg/contrib/strutl.h
@@ -62,6 +62,7 @@ void ioprintf(ostream &out,const char *format,...) APT_FORMAT2;
 void strprintf(string &out,const char *format,...) APT_FORMAT2;
 char *safe_snprintf(char *Buffer,char *End,const char *Format,...) APT_FORMAT3;
 bool CheckDomainList(const string &Host, const string &List);
+int tolower_ascii(int c);
 
 #define APT_MKSTRCMP(name,func) \
 inline int name(const char *A,const char *AEnd,const char *B) {return func(A,AEnd,B,B+strlen(B));}; \