Merge remote-tracking branch 'upstream/debian/experimental' into feature/acq-trans

[apt.git] / apt-pkg / contrib / strutl.cc

diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index d4f53ea3aa3b3e8c62267c19048d0f3d6859ab15..9238966cdd31e1899c15ca2e9f4ab5f136d3140b 100644 (file)
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -21,6 +21,11 @@
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 
+#include <stddef.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string>
+#include <vector>
 #include <ctype.h>
 #include <string.h>
 #include <sstream>
@@ -33,9 +38,9 @@
 #include <iconv.h>
 
 #include <apti18n.h>
-
-using namespace std;
                                                                        /*}}}*/
+using namespace std;
+
 // Strip - Remove white space from the front and back of a string       /*{{{*/
 // ---------------------------------------------------------------------
 namespace APT {
@@ -57,6 +62,13 @@ bool Endswith(const std::string &s, const std::string &end)
    return (s.substr(s.size() - end.size(), s.size()) == end);
 }
 
+bool Startswith(const std::string &s, const std::string &start)
+{
+   if (start.size() > s.size())
+      return false;
+   return (s.substr(0, start.size()) == start);
+}
+
 }
 }
                                                                        /*}}}*/
@@ -153,7 +165,7 @@ char *_strrstrip(char *String)
    End++;
    *End = 0;
    return String;
-};
+}
                                                                        /*}}}*/
 // strtabexpand - Converts tabs into 8 spaces                          /*{{{*/
 // ---------------------------------------------------------------------
@@ -429,23 +441,30 @@ string TimeToStr(unsigned long Sec)
 /* This replaces all occurrences of Subst with Contents in Str. */
 string SubstVar(const string &Str,const string &Subst,const string &Contents)
 {
+   if (Subst.empty() == true)
+      return Str;
+
    string::size_type Pos = 0;
    string::size_type OldPos = 0;
    string Temp;
-   
-   while (OldPos < Str.length() && 
+
+   while (OldPos < Str.length() &&
          (Pos = Str.find(Subst,OldPos)) != string::npos)
    {
-      Temp += string(Str,OldPos,Pos) + Contents;
-      OldPos = Pos + Subst.length();      
+      if (OldPos != Pos)
+        Temp.append(Str, OldPos, Pos - OldPos);
+      if (Contents.empty() == false)
+        Temp.append(Contents);
+      OldPos = Pos + Subst.length();
    }
-   
+
    if (OldPos == 0)
       return Str;
-   
+
+   if (OldPos >= Str.length())
+      return Temp;
    return Temp + string(Str,OldPos);
 }
-
 string SubstVar(string Str,const struct SubstVar *Vars)
 {
    for (; Vars->Subst != 0; Vars++)
@@ -692,9 +711,12 @@ string LookupTag(const string &Message,const char *Tag,const char *Default)
    then returns the result. Several varients on true/false are checked. */
 int StringToBool(const string &Text,int Default)
 {
-   char *End;
-   int Res = strtol(Text.c_str(),&End,0);   
-   if (End != Text.c_str() && Res >= 0 && Res <= 1)
+   char *ParseEnd;
+   int Res = strtol(Text.c_str(),&ParseEnd,0);
+   // ensure that the entire string was converted by strtol to avoid
+   // failures on "apt-cache show -a 0ad" where the "0" is converted
+   const char *TextEnd = Text.c_str()+Text.size();
+   if (ParseEnd == TextEnd && Res >= 0 && Res <= 1)
       return Res;
    
    // Check for positives
@@ -1034,7 +1056,7 @@ bool StrToNum(const char *Str,unsigned long long &Res,unsigned Len,unsigned Base
 // ---------------------------------------------------------------------
 /* This is used in decoding the 256bit encoded fixed length fields in
    tar files */
-bool Base256ToNum(const char *Str,unsigned long &Res,unsigned int Len)
+bool Base256ToNum(const char *Str,unsigned long long &Res,unsigned int Len)
 {
    if ((Str[0] & 0x80) == 0)
       return false;
@@ -1047,6 +1069,23 @@ bool Base256ToNum(const char *Str,unsigned long &Res,unsigned int Len)
    }
 }
                                                                        /*}}}*/
+// Base256ToNum - Convert a fixed length binary to a number             /*{{{*/
+// ---------------------------------------------------------------------
+/* This is used in decoding the 256bit encoded fixed length fields in
+   tar files */
+bool Base256ToNum(const char *Str,unsigned long &Res,unsigned int Len)
+{
+   unsigned long long Num;
+   bool rc;
+
+   rc = Base256ToNum(Str, Num, Len);
+   Res = Num;
+   if (Res != Num)
+      return false;
+
+   return rc;
+}
+                                                                       /*}}}*/
 // HexDigit - Convert a hex character into an integer                  /*{{{*/
 // ---------------------------------------------------------------------
 /* Helper for Hex2Num */
@@ -1130,9 +1169,11 @@ bool TokSplitString(char Tok,char *Input,char **List,
    also, but the advantage is that we have an iteratable vector */
 vector<string> VectorizeString(string const &haystack, char const &split)
 {
+   vector<string> exploded;
+   if (haystack.empty() == true)
+      return exploded;
    string::const_iterator start = haystack.begin();
    string::const_iterator end = start;
-   vector<string> exploded;
    do {
       for (; end != haystack.end() && *end != split; ++end);
       exploded.push_back(string(start, end));
@@ -1182,7 +1223,7 @@ unsigned long RegexChoice(RxChoiceList *Rxs,const char **ListBegin,
       R->Hit = false;
 
    unsigned long Hits = 0;
-   for (; ListBegin != ListEnd; ListBegin++)
+   for (; ListBegin < ListEnd; ++ListBegin)
    {
       // Check if the name is a regex
       const char *I;