X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/54cf15cb909b722a69d73850ad66bfad6cee66fa..aac2e51078714d5130861035e9b3b5d4d6b84471:/apt-pkg/contrib/strutl.cc diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc index 93a2b39cd..d96155917 100644 --- a/apt-pkg/contrib/strutl.cc +++ b/apt-pkg/contrib/strutl.cc @@ -1,12 +1,12 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: strutl.cc,v 1.30 1999/10/17 07:30:23 jgg Exp $ +// $Id: strutl.cc,v 1.48 2003/07/18 14:15:11 mdz Exp $ /* ###################################################################### - String Util - Some usefull string functions. + String Util - Some useful string functions. - These have been collected from here and there to do all sorts of usefull - things to strings. They are usefull in file parsers, URI handlers and + These have been collected from here and there to do all sorts of useful + things to strings. They are useful in file parsers, URI handlers and especially in APT methods. This source is placed in the Public Domain, do with it what you will @@ -21,12 +21,21 @@ #include #include +#include +#include + #include #include #include #include +#include #include +#include + +#include "config.h" + +using namespace std; /*}}}*/ // strstrip - Remove white space from the front and back of a string /*{{{*/ @@ -87,7 +96,8 @@ char *_strtabexpand(char *String,size_t Len) // --------------------------------------------------------------------- /* This grabs a single word, converts any % escaped characters to their proper values and advances the pointer. Double quotes are understood - and striped out as well. This is for URI/URL parsing. */ + and striped out as well. This is for URI/URL parsing. It also can + understand [] brackets.*/ bool ParseQuoteWord(const char *&String,string &Res) { // Skip leading whitespace @@ -101,7 +111,13 @@ bool ParseQuoteWord(const char *&String,string &Res) { if (*C == '"') { - for (C++;*C != 0 && *C != '"'; C++); + for (C++; *C != 0 && *C != '"'; C++); + if (*C == 0) + return false; + } + if (*C == '[') + { + for (C++; *C != 0 && *C != ']'; C++); if (*C == 0) return false; } @@ -140,9 +156,9 @@ bool ParseQuoteWord(const char *&String,string &Res) /*}}}*/ // ParseCWord - Parses a string like a C "" expression /*{{{*/ // --------------------------------------------------------------------- -/* This expects a series of space seperated strings enclosed in ""'s. +/* This expects a series of space separated strings enclosed in ""'s. It concatenates the ""'s into a single string. */ -bool ParseCWord(const char *String,string &Res) +bool ParseCWord(const char *&String,string &Res) { // Skip leading whitespace const char *C = String; @@ -173,19 +189,20 @@ bool ParseCWord(const char *String,string &Res) if (isspace(*C) == 0) return false; *Buf++ = ' '; - } + } *Buf = 0; Res = Buffer; + String = C; return true; } /*}}}*/ // 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) @@ -203,10 +220,10 @@ string QuoteString(string Str,const char *Bad) // DeQuoteString - Convert a string from quoted from /*{{{*/ // --------------------------------------------------------------------- /* This undoes QuoteString */ -string DeQuoteString(string Str) +string DeQuoteString(const string &Str) { string Res; - for (string::iterator I = Str.begin(); I != Str.end(); I++) + for (string::const_iterator I = Str.begin(); I != Str.end(); I++) { if (*I == '%' && I + 2 < Str.end()) { @@ -300,7 +317,7 @@ string TimeToStr(unsigned long Sec) // 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; @@ -318,27 +335,31 @@ string SubstVar(string Str,string Subst,string Contents) return Temp + string(Str,OldPos); } + +string SubstVar(string Str,const struct SubstVar *Vars) +{ + for (; Vars->Subst != 0; Vars++) + Str = SubstVar(Str,Vars->Subst,*Vars->Contents); + return Str; +} /*}}}*/ // URItoFileName - Convert the uri into a unique file name /*{{{*/ // --------------------------------------------------------------------- /* 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 /*{{{*/ @@ -347,7 +368,7 @@ string URItoFileName(string URI) 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', @@ -418,6 +439,43 @@ int stringcmp(const char *A,const char *AEnd,const char *B,const char *BEnd) return -1; return 1; } + +#if __GNUC__ >= 3 +int stringcmp(string::const_iterator A,string::const_iterator AEnd, + const char *B,const char *BEnd) +{ + for (; A != AEnd && B != BEnd; A++, B++) + if (*A != *B) + break; + + if (A == AEnd && B == BEnd) + return 0; + if (A == AEnd) + return 1; + if (B == BEnd) + return -1; + if (*A < *B) + return -1; + return 1; +} +int stringcmp(string::const_iterator A,string::const_iterator AEnd, + string::const_iterator B,string::const_iterator BEnd) +{ + for (; A != AEnd && B != BEnd; A++, B++) + if (*A != *B) + break; + + if (A == AEnd && B == BEnd) + return 0; + if (A == AEnd) + return 1; + if (B == BEnd) + return -1; + if (*A < *B) + return -1; + return 1; +} +#endif /*}}}*/ // stringcasecmp - Arbitary case insensitive string compare /*{{{*/ // --------------------------------------------------------------------- @@ -438,28 +496,64 @@ int stringcasecmp(const char *A,const char *AEnd,const char *B,const char *BEnd) return -1; return 1; } +#if __GNUC__ >= 3 +int stringcasecmp(string::const_iterator A,string::const_iterator AEnd, + const char *B,const char *BEnd) +{ + for (; A != AEnd && B != BEnd; A++, B++) + if (toupper(*A) != toupper(*B)) + break; + + if (A == AEnd && B == BEnd) + return 0; + if (A == AEnd) + return 1; + if (B == BEnd) + return -1; + if (toupper(*A) < toupper(*B)) + return -1; + return 1; +} +int stringcasecmp(string::const_iterator A,string::const_iterator AEnd, + string::const_iterator B,string::const_iterator BEnd) +{ + for (; A != AEnd && B != BEnd; A++, B++) + if (toupper(*A) != toupper(*B)) + break; + + if (A == AEnd && B == BEnd) + return 0; + if (A == AEnd) + return 1; + if (B == BEnd) + return -1; + if (toupper(*A) < toupper(*B)) + return -1; + return 1; +} +#endif /*}}}*/ // LookupTag - Lookup the value of a tag in a taged string /*{{{*/ // --------------------------------------------------------------------- /* 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++); for (; J > I && isspace(J[-1]) != 0; J--); - return string(I,J-I); + return string(I,J); } for (; *I != '\n' && I < Message.end(); I++); @@ -475,7 +569,7 @@ string LookupTag(string Message,const char *Tag,const char *Default) // --------------------------------------------------------------------- /* 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 = -1) +int StringToBool(const string &Text,int Default) { char *End; int Res = strtol(Text.c_str(),&End,0); @@ -527,7 +621,7 @@ string TimeRFC1123(time_t Date) fancy buffering is used. */ bool ReadMessages(int Fd, vector &List) { - char Buffer[4000]; + char Buffer[64000]; char *End = Buffer; while (1) @@ -541,9 +635,11 @@ bool ReadMessages(int Fd, vector &List) return false; // No data - if (Res <= 0) + if (Res < 0 && errno == EAGAIN) return true; - + if (Res < 0) + return false; + End += Res; // Look for the end of the message @@ -553,7 +649,7 @@ bool ReadMessages(int Fd, vector &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++); @@ -615,7 +711,11 @@ static int MonthConv(char *Month) Contributed by Roger Beeman , with the help of Mark Baushke and the rest of the Gurus at CISCO. */ -#ifndef __USE_MISC // glib sets this + +/* Turned it into an autoconf check, because GNU is not the only thing which + can provide timegm. -- 2002-09-22, Joel Baker */ + +#ifndef HAVE_TIMEGM // Now with autoconf! static time_t timegm(struct tm *t) { time_t tl, tb; @@ -633,8 +733,9 @@ static time_t timegm(struct tm *t) /* This handles all 3 populare time formats including RFC 1123, RFC 1036 and the C library asctime format. It requires the GNU library function '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 :<*/ -bool StrToTime(string Val,time_t &Result) + reason the C library does not provide any such function :< This also + handles the weird, but unambiguous FTP time format*/ +bool StrToTime(const string &Val,time_t &Result) { struct tm Tm; char Month[10]; @@ -644,6 +745,7 @@ bool StrToTime(string Val,time_t &Result) for (;*I != 0 && *I != ' '; I++); // Handle RFC 1123 time + Month[0] = 0; if (sscanf(I," %d %3s %d %d:%d:%d GMT",&Tm.tm_mday,Month,&Tm.tm_year, &Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec) != 6) { @@ -656,12 +758,19 @@ bool StrToTime(string Val,time_t &Result) // asctime format if (sscanf(I," %3s %d %d:%d:%d %d",Month,&Tm.tm_mday, &Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec,&Tm.tm_year) != 6) - return false; + { + // 'ftp' time + if (sscanf(Val.c_str(),"%4d%2d%2d%2d%2d%2d",&Tm.tm_year,&Tm.tm_mon, + &Tm.tm_mday,&Tm.tm_hour,&Tm.tm_min,&Tm.tm_sec) != 6) + return false; + Tm.tm_mon--; + } } } Tm.tm_isdst = 0; - Tm.tm_mon = MonthConv(Month); + if (Month[0] != 0) + Tm.tm_mon = MonthConv(Month); Tm.tm_year -= 1900; // Convert to local time and then to GMT @@ -713,15 +822,14 @@ static int HexDigit(int c) // 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 char *Start,const char *End,unsigned char *Num, - unsigned int Length) +bool Hex2Num(const string &Str,unsigned char *Num,unsigned int Length) { - if (End - Start != (signed)(Length*2)) + if (Str.length() != Length*2) return false; // Convert each digit. We store it in the same order as the string int J = 0; - for (const char *I = Start; I < End;J++, I += 2) + for (string::const_iterator I = Str.begin(); I != Str.end();J++, I += 2) { if (isxdigit(*I) == 0 || isxdigit(I[1]) == 0) return false; @@ -733,15 +841,176 @@ bool Hex2Num(const char *Start,const char *End,unsigned char *Num, return true; } /*}}}*/ +// TokSplitString - Split a string up by a given token /*{{{*/ +// --------------------------------------------------------------------- +/* This is intended to be a faster splitter, it does not use dynamic + memories. Input is changed to insert nulls at each token location. */ +bool TokSplitString(char Tok,char *Input,char **List, + unsigned long ListMax) +{ + // Strip any leading spaces + char *Start = Input; + char *Stop = Start + strlen(Start); + for (; *Start != 0 && isspace(*Start) != 0; Start++); + + unsigned long Count = 0; + char *Pos = Start; + while (Pos != Stop) + { + // Skip to the next Token + for (; Pos != Stop && *Pos != Tok; Pos++); + + // Back remove spaces + char *End = Pos; + for (; End > Start && (End[-1] == Tok || isspace(End[-1]) != 0); End--); + *End = 0; + + List[Count++] = Start; + if (Count >= ListMax) + { + List[Count-1] = 0; + return false; + } + + // Advance pos + for (; Pos != Stop && (*Pos == Tok || isspace(*Pos) != 0 || *Pos == 0); Pos++); + Start = Pos; + } + + List[Count] = 0; + return true; +} + /*}}}*/ +// RegexChoice - Simple regex list/list matcher /*{{{*/ +// --------------------------------------------------------------------- +/* */ +unsigned long RegexChoice(RxChoiceList *Rxs,const char **ListBegin, + const char **ListEnd) +{ + for (RxChoiceList *R = Rxs; R->Str != 0; R++) + R->Hit = false; + + unsigned long Hits = 0; + for (; ListBegin != ListEnd; ListBegin++) + { + // Check if the name is a regex + const char *I; + bool Regex = true; + for (I = *ListBegin; *I != 0; I++) + if (*I == '.' || *I == '?' || *I == '*' || *I == '|') + break; + if (*I == 0) + Regex = false; + + // Compile the regex pattern + regex_t Pattern; + if (Regex == true) + if (regcomp(&Pattern,*ListBegin,REG_EXTENDED | REG_ICASE | + REG_NOSUB) != 0) + Regex = false; + + // Search the list + bool Done = false; + for (RxChoiceList *R = Rxs; R->Str != 0; R++) + { + if (R->Str[0] == 0) + continue; + + if (strcasecmp(R->Str,*ListBegin) != 0) + { + if (Regex == false) + continue; + if (regexec(&Pattern,R->Str,0,0,0) != 0) + continue; + } + Done = true; + + if (R->Hit == false) + Hits++; + + R->Hit = true; + } + + if (Regex == true) + regfree(&Pattern); + + if (Done == false) + _error->Warning(_("Selection %s not found"),*ListBegin); + } + + return Hits; +} + /*}}}*/ +// ioprintf - C format string outputter to C++ iostreams /*{{{*/ +// --------------------------------------------------------------------- +/* 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; + va_start(args,format); + + // sprintf the description + char S[400]; + vsnprintf(S,sizeof(S),format,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(const string &Host,const string &List) +{ + string::const_iterator Start = List.begin(); + for (string::const_iterator Cur = List.begin(); Cur <= List.end(); Cur++) + { + if (Cur < List.end() && *Cur != ',') + continue; + + // Match the end of the string.. + if ((Host.size() >= (unsigned)(Cur - Start)) && + Cur - Start != 0 && + stringcasecmp(Host.end() - (Cur - Start),Host.end(),Start,Cur) == 0) + return true; + + Start = Cur + 1; + } + return false; +} + /*}}}*/ // 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(); - // Locate the first colon, this seperates the scheme + // Locate the first colon, this separates the scheme for (; I < U.end() && *I != ':' ; I++); string::const_iterator FirstColon = I; @@ -750,19 +1019,30 @@ void URI::CopyFrom(string U) string::const_iterator SingleSlash = I; if (I + 3 < U.end() && I[1] == '/' && I[2] == '/') SingleSlash += 3; - for (; SingleSlash < U.end() && *SingleSlash != '/'; SingleSlash++); + + /* Find the / indicating the end of the hostname, ignoring /'s in the + square brackets */ + bool InBracket = false; + for (; SingleSlash < U.end() && (*SingleSlash != '/' || InBracket == true); SingleSlash++) + { + if (*SingleSlash == '[') + InBracket = true; + if (InBracket == true && *SingleSlash == ']') + InBracket = false; + } + if (SingleSlash > U.end()) 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; @@ -787,24 +1067,53 @@ void URI::CopyFrom(string U) 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. + unsigned long PortEnd = 0; + InBracket = false; + for (unsigned I = 0; I != Host.length();) + { + if (Host[I] == '[') + { + InBracket = true; + Host.erase(I,1); + continue; + } + + if (InBracket == true && Host[I] == ']') + { + InBracket = false; + Host.erase(I,1); + PortEnd = I; + continue; + } + I++; + } + + // Tsk, weird. + if (InBracket == true) + { + Host.clear(); + return; + } + // Now we parse off a port number from the hostname Port = 0; string::size_type Pos = Host.rfind(':'); - if (Pos == string::npos) + if (Pos == string::npos || Pos < PortEnd) 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 /*{{{*/ @@ -818,10 +1127,10 @@ URI::operator string() Res = Access + ':'; if (Host.empty() == false) - { + { if (Access.empty() == false) Res += "//"; - + if (User.empty() == false) { Res += User; @@ -830,7 +1139,13 @@ URI::operator string() Res += "@"; } - Res += Host; + // Add RFC 2732 escaping characters + if (Access.empty() == false && + (Host.find('/') != string::npos || Host.find(':') != string::npos)) + Res += '[' + Host + ']'; + else + Res += Host; + if (Port != 0) { char S[30]; @@ -850,3 +1165,16 @@ URI::operator string() return Res; } /*}}}*/ +// URI::SiteOnly - Return the schema and site for the URI /*{{{*/ +// --------------------------------------------------------------------- +/* */ +string URI::SiteOnly(const string &URI) +{ + ::URI U(URI); + U.User.clear(); + U.Password.clear(); + U.Path.clear(); + U.Port = 0; + return U; +} + /*}}}*/