FileFd: avoid further writing if file failed

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

diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc
index 05624f7fba8a6f4fea0fd2d19ee92f871d97756a..d388cbda3a4dd6f7f62f7ec13f9db391a82f075d 100644 (file)
--- a/apt-pkg/contrib/strutl.cc
+++ b/apt-pkg/contrib/strutl.cc
@@ -331,7 +331,7 @@ string QuoteString(const string &Str, const char *Bad)
          *I == 0x25 || // percent '%' char
          *I <= 0x20 || *I >= 0x7F) // control chars
       {
-        ioprintf(Res,"%%%02x",(int)*I);
+        ioprintf(Res, "%%%02hhx", *I);
       }
       else
         Res << *I;
@@ -464,7 +464,9 @@ string SubstVar(const string &Str,const string &Subst,const string &Contents)
 
    if (OldPos >= Str.length())
       return Temp;
-   return Temp + string(Str,OldPos);
+
+   Temp.append(Str, OldPos, string::npos);
+   return Temp;
 }
 string SubstVar(string Str,const struct SubstVar *Vars)
 {
@@ -690,9 +692,9 @@ string LookupTag(const string &Message,const char *Tag,const char *Default)
         // Find the end of line and strip the leading/trailing spaces
         string::const_iterator J;
         I += Length + 1;
-        for (; isspace(*I) != 0 && I < Message.end(); ++I);
+        for (; isspace_ascii(*I) != 0 && I < Message.end(); ++I);
         for (J = I; *J != '\n' && J < Message.end(); ++J);
-        for (; J > I && isspace(J[-1]) != 0; --J);
+        for (; J > I && isspace_ascii(J[-1]) != 0; --J);
         
         return string(I,J);
       }
@@ -788,7 +790,11 @@ bool ReadMessages(int Fd, vector<string> &List)
         return false;
 
       // No data
+#if EAGAIN != EWOULDBLOCK
       if (Res < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))
+#else
+      if (Res < 0 && errno == EAGAIN)
+#endif
         return true;
       if (Res < 0)
         return false;
@@ -1106,26 +1112,36 @@ static int HexDigit(int c)
       return c - 'a' + 10;
    if (c >= 'A' && c <= 'F')
       return c - 'A' + 10;
-   return 0;
+   return -1;
 }
                                                                        /*}}}*/
 // Hex2Num - Convert a long hex number into a buffer                   /*{{{*/
 // ---------------------------------------------------------------------
 /* The length of the buffer must be exactly 1/2 the length of the string. */
 bool Hex2Num(const string &Str,unsigned char *Num,unsigned int Length)
+{
+   return Hex2Num(APT::StringView(Str), Num, Length);
+}
+
+bool Hex2Num(const APT::StringView Str,unsigned char *Num,unsigned int Length)
 {
    if (Str.length() != Length*2)
       return false;
    
    // Convert each digit. We store it in the same order as the string
    int J = 0;
-   for (string::const_iterator I = Str.begin(); I != Str.end();J++, I += 2)
+   for (auto I = Str.begin(); I != Str.end();J++, I += 2)
    {
-      if (isxdigit(*I) == 0 || isxdigit(I[1]) == 0)
+      int first_half = HexDigit(I[0]);
+      int second_half;
+      if (first_half < 0)
         return false;
       
-      Num[J] = HexDigit(I[0]) << 4;
-      Num[J] += HexDigit(I[1]);
+      second_half = HexDigit(I[1]);
+      if (second_half < 0)
+        return false;
+      Num[J] = first_half << 4;
+      Num[J] += second_half;
    }
    
    return true;
@@ -1201,7 +1217,7 @@ vector<string> StringSplit(std::string const &s, std::string const &sep,
    vector<string> split;
    size_t start, pos;
 
-   // no seperator given, this is bogus
+   // no separator given, this is bogus
    if(sep.size() == 0)
       return split;
 
@@ -1364,17 +1380,32 @@ string StripEpoch(const string &VerStr)
    return VerStr.substr(i+1);
 }
                                                                        /*}}}*/
+
 // tolower_ascii - tolower() function that ignores the locale          /*{{{*/
 // ---------------------------------------------------------------------
 /* This little function is the most called method we have and tries
    therefore to do the absolut minimum - and is notable faster than
    standard tolower/toupper and as a bonus avoids problems with different
    locales - we only operate on ascii chars anyway. */
+#undef tolower_ascii
+int tolower_ascii(int const c) APT_CONST APT_COLD;
 int tolower_ascii(int const c)
 {
-   if (c >= 'A' && c <= 'Z')
-      return c + 32;
-   return c;
+   return tolower_ascii_inline(c);
+}
+                                                                       /*}}}*/
+
+// isspace_ascii - isspace() function that ignores the locale          /*{{{*/
+// ---------------------------------------------------------------------
+/* This little function is one of the most called methods we have and tries
+   therefore to do the absolut minimum - and is notable faster than
+   standard isspace() and as a bonus avoids problems with different
+   locales - we only operate on ascii chars anyway. */
+#undef isspace_ascii
+int isspace_ascii(int const c) APT_CONST APT_COLD;
+int isspace_ascii(int const c)
+{
+   return isspace_ascii_inline(c);
 }
                                                                        /*}}}*/