// -*- 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.
#include <ctype.h>
#include <string.h>
#include <stdio.h>
+#include <algorithm>
#include <unistd.h>
#include <regex.h>
#include <errno.h>
// QuoteString - Convert a string into quoted from /*{{{*/
// ---------------------------------------------------------------------
/* */
-string QuoteString(string Str,const char *Bad)
+string QuoteString(const string &Str, const char *Bad)
{
string Res;
- for (string::iterator I = Str.begin(); I != Str.end(); I++)
+ for (string::const_iterator I = Str.begin(); I != Str.end(); I++)
{
if (strchr(Bad,*I) != 0 || isprint(*I) == 0 ||
*I <= 0x20 || *I >= 0x7F)
// DeQuoteString - Convert a string from quoted from /*{{{*/
// ---------------------------------------------------------------------
/* This undoes QuoteString */
-string DeQuoteString(string Str)
+string DeQuoteString(const string &Str)
{
string Res;
for (string::const_iterator I = Str.begin(); I != Str.end(); I++)
// SubstVar - Substitute a string for another string /*{{{*/
// ---------------------------------------------------------------------
/* This replaces all occurances of Subst with Contents in Str. */
-string SubstVar(string Str,string Subst,string Contents)
+string SubstVar(const string &Str,const string &Subst,const string &Contents)
{
string::size_type Pos = 0;
string::size_type OldPos = 0;
/* This converts a URI into a safe filename. It quotes all unsafe characters
and converts / to _ and removes the scheme identifier. The resulting
file name should be unique and never occur again for a different file */
-string URItoFileName(string URI)
+string URItoFileName(const string &URI)
{
// Nuke 'sensitive' items
::URI U(URI);
- U.User = string();
- U.Password = string();
- U.Access = "";
+ U.User.clear();
+ U.Password.clear();
+ U.Access.clear();
// "\x00-\x20{}|\\\\^\\[\\]<>\"\x7F-\xFF";
- URI = QuoteString(U,"\\|{}[]<>\"^~_=!@#$%^&*");
- string::iterator J = URI.begin();
- for (; J != URI.end(); J++)
- if (*J == '/')
- *J = '_';
- return URI;
+ string NewURI = QuoteString(U,"\\|{}[]<>\"^~_=!@#$%^&*");
+ replace(NewURI.begin(),NewURI.end(),'/','_');
+ return NewURI;
}
/*}}}*/
// Base64Encode - Base64 Encoding routine for short strings /*{{{*/
from wget and then patched and bug fixed.
This spec can be found in rfc2045 */
-string Base64Encode(string S)
+string Base64Encode(const string &S)
{
// Conversion table.
static char tbl[64] = {'A','B','C','D','E','F','G','H',
// ---------------------------------------------------------------------
/* The format is like those used in package files and the method
communication system */
-string LookupTag(string Message,const char *Tag,const char *Default)
+string LookupTag(const string &Message,const char *Tag,const char *Default)
{
// Look for a matching tag.
int Length = strlen(Tag);
- for (string::iterator I = Message.begin(); I + Length < Message.end(); I++)
+ for (string::const_iterator I = Message.begin(); I + Length < Message.end(); I++)
{
// Found the tag
if (I[Length] == ':' && stringcasecmp(I,I+Length,Tag) == 0)
{
// Find the end of line and strip the leading/trailing spaces
- string::iterator J;
+ string::const_iterator J;
I += Length + 1;
for (; isspace(*I) != 0 && I < Message.end(); I++);
for (J = I; *J != '\n' && J < Message.end(); J++);
// ---------------------------------------------------------------------
/* This inspects the string to see if it is true or if it is false and
then returns the result. Several varients on true/false are checked. */
-int StringToBool(string Text,int Default)
+int StringToBool(const string &Text,int Default)
{
char *End;
int Res = strtol(Text.c_str(),&End,0);
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++);
'timegm' to convert a struct tm in UTC to a time_t. For some bizzar
reason the C library does not provide any such function :< This also
handles the weird, but unambiguous FTP time format*/
-bool StrToTime(string Val,time_t &Result)
+bool StrToTime(const string &Val,time_t &Result)
{
struct tm Tm;
char Month[10];
// 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(string Str,unsigned char *Num,unsigned int Length)
+bool Hex2Num(const string &Str,unsigned char *Num,unsigned int Length)
{
if (Str.length() != Length*2)
return false;
/*}}}*/
// 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;
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 /*{{{*/
// ---------------------------------------------------------------------
/* The domain list is a comma seperate list of domains that are suffix
matched against the argument */
-bool CheckDomainList(string Host,string List)
+bool CheckDomainList(const string &Host,const string &List)
{
string::const_iterator Start = List.begin();
for (string::const_iterator Cur = List.begin(); Cur <= List.end(); Cur++)
// URI::CopyFrom - Copy from an object /*{{{*/
// ---------------------------------------------------------------------
/* This parses the URI into all of its components */
-void URI::CopyFrom(string U)
+void URI::CopyFrom(const string &U)
{
string::const_iterator I = U.begin();
SingleSlash = U.end();
// We can now write the access and path specifiers
- Access = string(U,0,FirstColon - U.begin());
+ Access.assign(U.begin(),FirstColon);
if (SingleSlash != U.end())
- Path = string(U,SingleSlash - U.begin());
+ Path.assign(SingleSlash,U.end());
if (Path.empty() == true)
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;
if (At == SingleSlash)
{
if (FirstColon < SingleSlash)
- Host = string(U,FirstColon - U.begin(),SingleSlash - FirstColon);
+ Host.assign(FirstColon,SingleSlash);
}
else
{
- Host = string(U,At - U.begin() + 1,SingleSlash - At - 1);
- User = string(U,FirstColon - U.begin(),SecondColon - FirstColon);
+ Host.assign(At+1,SingleSlash);
+ User.assign(FirstColon,SecondColon);
if (SecondColon < At)
- Password = string(U,SecondColon - U.begin() + 1,At - SecondColon - 1);
+ Password.assign(SecondColon+1,At);
}
// Now we parse the RFC 2732 [] hostnames.
// Tsk, weird.
if (InBracket == true)
{
- Host = string();
+ Host.clear();
return;
}
return;
Port = atoi(string(Host,Pos+1).c_str());
- Host = string(Host,0,Pos);
+ Host.assign(Host,0,Pos);
}
/*}}}*/
// URI::operator string - Convert the URI to a string /*{{{*/
// URI::SiteOnly - Return the schema and site for the URI /*{{{*/
// ---------------------------------------------------------------------
/* */
-string URI::SiteOnly(string URI)
+string URI::SiteOnly(const string &URI)
{
::URI U(URI);
- U.User = string();
- U.Password = string();
- U.Path = string();
+ U.User.clear();
+ U.Password.clear();
+ U.Path.clear();
U.Port = 0;
return U;
}
projects / apt.git / blobdiff