X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/41b6caf4a956cd9d6032aafa87cc75ac7c94b6a5..f8ac1720a94468d1384e88a57729e6d9801b56fd:/apt-pkg/contrib/strutl.cc

diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index b37cdd1bd..a75fbdf92 100644
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: strutl.cc,v 1.46 2002/11/22 07:15:23 doogie Exp $
+// $Id: strutl.cc,v 1.48 2003/07/18 14:15:11 mdz Exp $
 /* ######################################################################
 
    String Util - Some useful string functions.
@@ -652,7 +652,7 @@ bool ReadMessages(int Fd, vector<string> &List)
 	    continue;
 	 
 	 // Pull the message out
-	 string Message(Buffer,0,I-Buffer);
+	 string Message(Buffer,I-Buffer);
 
 	 // Fix up the buffer
 	 for (; I < End && *I == '\n'; I++);
@@ -946,8 +946,8 @@ unsigned long RegexChoice(RxChoiceList *Rxs,const char **ListBegin,
 									/*}}}*/
 // ioprintf - C format string outputter to C++ iostreams		/*{{{*/
 // ---------------------------------------------------------------------
-/* This is used to make the internationalization strinc easier to translate
- and to allow reordering of parameters */
+/* This is used to make the internationalization strings easier to translate
+   and to allow reordering of parameters */
 void ioprintf(ostream &out,const char *format,...) 
 {
    va_list args;
@@ -959,6 +959,28 @@ void ioprintf(ostream &out,const char *format,...)
    out << S;
 }
 									/*}}}*/
+// safe_snprintf - Safer snprintf					/*{{{*/
+// ---------------------------------------------------------------------
+/* This is a snprintf that will never (ever) go past 'End' and returns a
+   pointer to the end of the new string. The returned string is always null
+   terminated unless Buffer == end. This is a better alterantive to using
+   consecutive snprintfs. */
+char *safe_snprintf(char *Buffer,char *End,const char *Format,...)
+{
+   va_list args;
+   unsigned long Did;
+
+   va_start(args,Format);
+
+   if (End <= Buffer)
+      return End;
+
+   Did = vsnprintf(Buffer,End - Buffer,Format,args);
+   if (Did < 0 || Buffer + Did > End)
+      return End;
+   return Buffer + Did;
+}
+									/*}}}*/
 
 // CheckDomainList - See if Host is in a , seperate list		/*{{{*/
 // ---------------------------------------------------------------------
@@ -1023,7 +1045,7 @@ void URI::CopyFrom(string U)
       Path = "/";
 
    // Now we attempt to locate a user:pass@host fragment
-   if (FirstColon[1] == '/' && FirstColon[2] == '/')
+   if (FirstColon + 2 <= U.end() && FirstColon[1] == '/' && FirstColon[2] == '/')
       FirstColon += 3;
    else
       FirstColon += 1;