apt-pkg/contrib/strutl.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: strutl.h,v 1.22 2003/02/02 22:20:27 jgg Exp $
   4 /* ######################################################################
   5
   6    String Util - These are some useful string functions
   7
   8    _strstrip is a function to remove whitespace from the front and end
   9    of a string.
  10
  11    This source is placed in the Public Domain, do with it what you will
  12    It was originally written by Jason Gunthorpe <jgg@gpu.srv.ualberta.ca>
  13
  14    ##################################################################### */
  15                                                                         /*}}}*/
  16 #ifndef STRUTL_H
  17 #define STRUTL_H
  18
  19
  20 #include <limits>
  21 #include <stdlib.h>
  22 #include <string>
  23 #include <cstring>
  24 #include <vector>
  25 #include <iostream>
  26 #include <time.h>
  27
  28 #include "macros.h"
  29
  30 #ifndef APT_8_CLEANER_HEADERS
  31 using std::string;
  32 using std::vector;
  33 using std::ostream;
  34 #endif
  35
  36 namespace APT {
  37    namespace String {
  38       std::string Strip(const std::string &s);
  39    };
  40 };
  41
  42
  43 bool UTF8ToCodeset(const char *codeset, const std::string &orig, std::string *dest);
  44 char *_strstrip(char *String);
  45 char *_strrstrip(char *String); // right strip only
  46 char *_strtabexpand(char *String,size_t Len);
  47 bool ParseQuoteWord(const char *&String,std::string &Res);
  48 bool ParseCWord(const char *&String,std::string &Res);
  49 std::string QuoteString(const std::string &Str,const char *Bad);
  50 std::string DeQuoteString(const std::string &Str);
  51 std::string DeQuoteString(std::string::const_iterator const &begin, std::string::const_iterator const &end);
  52
  53 // unescape (\0XX and \xXX) from a string
  54 std::string DeEscapeString(const std::string &input);
  55
  56 std::string SizeToStr(double Bytes);
  57 std::string TimeToStr(unsigned long Sec);
  58 std::string Base64Encode(const std::string &Str);
  59 std::string OutputInDepth(const unsigned long Depth, const char* Separator="  ");
  60 std::string URItoFileName(const std::string &URI);
  61 std::string TimeRFC1123(time_t Date);
  62 bool RFC1123StrToTime(const char* const str,time_t &time) __must_check;
  63 bool FTPMDTMStrToTime(const char* const str,time_t &time) __must_check;
  64 __deprecated bool StrToTime(const std::string &Val,time_t &Result);
  65 std::string LookupTag(const std::string &Message,const char *Tag,const char *Default = 0);
  66 int StringToBool(const std::string &Text,int Default = -1);
  67 bool ReadMessages(int Fd, std::vector<std::string> &List);
  68 bool StrToNum(const char *Str,unsigned long &Res,unsigned Len,unsigned Base = 0);
  69 bool StrToNum(const char *Str,unsigned long long &Res,unsigned Len,unsigned Base = 0);
  70 bool Base256ToNum(const char *Str,unsigned long &Res,unsigned int Len);
  71 bool Hex2Num(const std::string &Str,unsigned char *Num,unsigned int Length);
  72
  73 // input changing string split
  74 bool TokSplitString(char Tok,char *Input,char **List,
  75                     unsigned long ListMax);
  76
  77 // split a given string by a char
  78 std::vector<std::string> VectorizeString(std::string const &haystack, char const &split) __attrib_const;
  79
  80 /* \brief Return a vector of strings from string "input" where "sep"
  81  * is used as the delimiter string.
  82  *
  83  * \param input The input string.
  84  *
  85  * \param sep The seperator to use.
  86  *
  87  * \param maxsplit (optional) The maximum amount of splitting that
  88  * should be done .
  89  *
  90  * The optional "maxsplit" argument can be used to limit the splitting,
  91  * if used the string is only split on maxsplit places and the last
  92  * item in the vector contains the remainder string.
  93  */
  94 std::vector<std::string> StringSplit(std::string const &input,
  95                                      std::string const &sep,
  96                                      unsigned int maxsplit=std::numeric_limits<unsigned int>::max()) __attrib_const;
  97
  98 void ioprintf(std::ostream &out,const char *format,...) __like_printf(2);
  99 void strprintf(std::string &out,const char *format,...) __like_printf(2);
 100 char *safe_snprintf(char *Buffer,char *End,const char *Format,...) __like_printf(3);
 101 bool CheckDomainList(const std::string &Host, const std::string &List);
 102 int tolower_ascii(int const c) __attrib_const __hot;
 103 std::string StripEpoch(const std::string &VerStr);
 104
 105 #define APT_MKSTRCMP(name,func) \
 106 inline int name(const char *A,const char *B) {return func(A,A+strlen(A),B,B+strlen(B));}; \
 107 inline int name(const char *A,const char *AEnd,const char *B) {return func(A,AEnd,B,B+strlen(B));}; \
 108 inline int name(const std::string& A,const char *B) {return func(A.c_str(),A.c_str()+A.length(),B,B+strlen(B));}; \
 109 inline int name(const std::string& A,const std::string& B) {return func(A.c_str(),A.c_str()+A.length(),B.c_str(),B.c_str()+B.length());}; \
 110 inline int name(const std::string& A,const char *B,const char *BEnd) {return func(A.c_str(),A.c_str()+A.length(),B,BEnd);};
 111
 112 #define APT_MKSTRCMP2(name,func) \
 113 inline int name(const char *A,const char *AEnd,const char *B) {return func(A,AEnd,B,B+strlen(B));}; \
 114 inline int name(const std::string& A,const char *B) {return func(A.begin(),A.end(),B,B+strlen(B));}; \
 115 inline int name(const std::string& A,const std::string& B) {return func(A.begin(),A.end(),B.begin(),B.end());}; \
 116 inline int name(const std::string& A,const char *B,const char *BEnd) {return func(A.begin(),A.end(),B,BEnd);};
 117
 118 int stringcmp(const char *A,const char *AEnd,const char *B,const char *BEnd);
 119 int stringcasecmp(const char *A,const char *AEnd,const char *B,const char *BEnd);
 120
 121 /* We assume that GCC 3 indicates that libstdc++3 is in use too. In that
 122    case the definition of string::const_iterator is not the same as
 123    const char * and we need these extra functions */
 124 #if __GNUC__ >= 3
 125 int stringcmp(std::string::const_iterator A,std::string::const_iterator AEnd,
 126               const char *B,const char *BEnd);
 127 int stringcmp(std::string::const_iterator A,std::string::const_iterator AEnd,
 128               std::string::const_iterator B,std::string::const_iterator BEnd);
 129 int stringcasecmp(std::string::const_iterator A,std::string::const_iterator AEnd,
 130                   const char *B,const char *BEnd);
 131 int stringcasecmp(std::string::const_iterator A,std::string::const_iterator AEnd,
 132                   std::string::const_iterator B,std::string::const_iterator BEnd);
 133
 134 inline int stringcmp(std::string::const_iterator A,std::string::const_iterator Aend,const char *B) {return stringcmp(A,Aend,B,B+strlen(B));};
 135 inline int stringcasecmp(std::string::const_iterator A,std::string::const_iterator Aend,const char *B) {return stringcasecmp(A,Aend,B,B+strlen(B));};
 136 #endif
 137
 138 APT_MKSTRCMP2(stringcmp,stringcmp);
 139 APT_MKSTRCMP2(stringcasecmp,stringcasecmp);
 140
 141 // Return the length of a NULL-terminated string array
 142 size_t strv_length(const char **str_array);
 143
 144
 145 inline const char *DeNull(const char *s) {return (s == 0?"(null)":s);};
 146
 147 class URI
 148 {
 149    void CopyFrom(const std::string &From);
 150
 151    public:
 152
 153    std::string Access;
 154    std::string User;
 155    std::string Password;
 156    std::string Host;
 157    std::string Path;
 158    unsigned int Port;
 159
 160    operator std::string();
 161    inline void operator =(const std::string &From) {CopyFrom(From);};
 162    inline bool empty() {return Access.empty();};
 163    static std::string SiteOnly(const std::string &URI);
 164    static std::string NoUserPassword(const std::string &URI);
 165
 166    URI(std::string Path) {CopyFrom(Path);};
 167    URI() : Port(0) {};
 168 };
 169
 170 struct SubstVar
 171 {
 172    const char *Subst;
 173    const std::string *Contents;
 174 };
 175 std::string SubstVar(std::string Str,const struct SubstVar *Vars);
 176 std::string SubstVar(const std::string &Str,const std::string &Subst,const std::string &Contents);
 177
 178 struct RxChoiceList
 179 {
 180    void *UserData;
 181    const char *Str;
 182    bool Hit;
 183 };
 184 unsigned long RegexChoice(RxChoiceList *Rxs,const char **ListBegin,
 185                       const char **ListEnd);
 186
 187 #endif