X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/d3e8fbb395f57954acd7a2095f02ce530a05ec6a..d27daedb6a0bf672508072100f20233d08ccf0e0:/apt-pkg/contrib/strutl.cc?ds=sidebyside diff --git a/apt-pkg/contrib/strutl.cc b/apt-pkg/contrib/strutl.cc index 0d85b4fd3..396cb7898 100644 --- a/apt-pkg/contrib/strutl.cc +++ b/apt-pkg/contrib/strutl.cc @@ -21,6 +21,11 @@ #include #include +#include +#include +#include +#include +#include #include #include #include @@ -33,21 +38,33 @@ #include #include - -using namespace std; /*}}}*/ +using namespace std; + // Strip - Remove white space from the front and back of a string /*{{{*/ // --------------------------------------------------------------------- namespace APT { namespace String { -std::string Strip(const std::string &s) +std::string Strip(const std::string &str) { - size_t start = s.find_first_not_of(" \t\n"); - // only whitespace - if (start == string::npos) + // ensure we have at least one character + if (str.empty() == true) + return str; + + char const * const s = str.c_str(); + size_t start = 0; + for (; isspace(s[start]) != 0; ++start) + ; // find the first not-space + + // string contains only whitespaces + if (s[start] == '\0') return ""; - size_t end = s.find_last_not_of(" \t\n"); - return s.substr(start, end-start+1); + + size_t end = str.length() - 1; + for (; isspace(s[end]) != 0; --end) + ; // find the last not-space + + return str.substr(start, end - start + 1); } bool Endswith(const std::string &s, const std::string &end) @@ -57,6 +74,13 @@ 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); +} + } } /*}}}*/ @@ -300,21 +324,19 @@ bool ParseCWord(const char *&String,string &Res) /* */ string QuoteString(const string &Str, const char *Bad) { - string Res; + std::stringstream Res; for (string::const_iterator I = Str.begin(); I != Str.end(); ++I) { - if (strchr(Bad,*I) != 0 || isprint(*I) == 0 || + if (strchr(Bad,*I) != 0 || isprint(*I) == 0 || *I == 0x25 || // percent '%' char *I <= 0x20 || *I >= 0x7F) // control chars { - char Buf[10]; - sprintf(Buf,"%%%02x",(int)*I); - Res += Buf; + ioprintf(Res, "%%%02hhx", *I); } else - Res += *I; + Res << *I; } - return Res; + return Res.str(); } /*}}}*/ // DeQuoteString - Convert a string from quoted from /*{{{*/ @@ -355,13 +377,12 @@ string DeQuoteString(string::const_iterator const &begin, YottaBytes (E24) */ string SizeToStr(double Size) { - char S[300]; double ASize; if (Size >= 0) ASize = Size; else ASize = -1*Size; - + /* bytes, KiloBytes, MegaBytes, GigaBytes, TeraBytes, PetaBytes, ExaBytes, ZettaBytes, YottaBytes */ char Ext[] = {'\0','k','M','G','T','P','E','Z','Y'}; @@ -370,20 +391,21 @@ string SizeToStr(double Size) { if (ASize < 100 && I != 0) { - sprintf(S,"%'.1f %c",ASize,Ext[I]); - break; + std::string S; + strprintf(S, "%'.1f %c", ASize, Ext[I]); + return S; } - + if (ASize < 10000) { - sprintf(S,"%'.0f %c",ASize,Ext[I]); - break; + std::string S; + strprintf(S, "%'.0f %c", ASize, Ext[I]); + return S; } ASize /= 1000.0; I++; } - - return S; + return ""; } /*}}}*/ // TimeToStr - Convert the time into a string /*{{{*/ @@ -391,36 +413,27 @@ string SizeToStr(double Size) /* Converts a number of seconds to a hms format */ string TimeToStr(unsigned long Sec) { - char S[300]; - - while (1) + std::string S; + if (Sec > 60*60*24) { - if (Sec > 60*60*24) - { - //d means days, h means hours, min means minutes, s means seconds - sprintf(S,_("%lid %lih %limin %lis"),Sec/60/60/24,(Sec/60/60) % 24,(Sec/60) % 60,Sec % 60); - break; - } - - if (Sec > 60*60) - { - //h means hours, min means minutes, s means seconds - sprintf(S,_("%lih %limin %lis"),Sec/60/60,(Sec/60) % 60,Sec % 60); - break; - } - - if (Sec > 60) - { - //min means minutes, s means seconds - sprintf(S,_("%limin %lis"),Sec/60,Sec % 60); - break; - } - - //s means seconds - sprintf(S,_("%lis"),Sec); - break; + //TRANSLATOR: d means days, h means hours, min means minutes, s means seconds + strprintf(S,_("%lid %lih %limin %lis"),Sec/60/60/24,(Sec/60/60) % 24,(Sec/60) % 60,Sec % 60); + } + else if (Sec > 60*60) + { + //TRANSLATOR: h means hours, min means minutes, s means seconds + strprintf(S,_("%lih %limin %lis"),Sec/60/60,(Sec/60) % 60,Sec % 60); + } + else if (Sec > 60) + { + //TRANSLATOR: min means minutes, s means seconds + strprintf(S,_("%limin %lis"),Sec/60,Sec % 60); + } + else + { + //TRANSLATOR: s means seconds + strprintf(S,_("%lis"),Sec); } - return S; } /*}}}*/ @@ -429,23 +442,30 @@ 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 +712,12 @@ 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 @@ -745,86 +768,94 @@ string TimeRFC1123(time_t Date) In particular: this reads blocks from the input until it believes that it's run out of input text. Each block is terminated by a - double newline ('\n' followed by '\n'). As noted below, there is a - bug in this code: it assumes that all the blocks have been read if - it doesn't see additional text in the buffer after the last one is - parsed, which will cause it to lose blocks if the last block - coincides with the end of the buffer. + double newline ('\n' followed by '\n'). */ bool ReadMessages(int Fd, vector &List) { char Buffer[64000]; - char *End = Buffer; // Represents any left-over from the previous iteration of the // parse loop. (i.e., if a message is split across the end // of the buffer, it goes here) string PartialMessage; - - while (1) - { - int Res = read(Fd,End,sizeof(Buffer) - (End-Buffer)); + + do { + int const Res = read(Fd, Buffer, sizeof(Buffer)); if (Res < 0 && errno == EINTR) continue; - - // Process is dead, this is kind of bad.. + + // process we read from has died if (Res == 0) return false; - + // No data - if (Res < 0 && errno == EAGAIN) + if (Res < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) return true; if (Res < 0) return false; - - End += Res; - - // Look for the end of the message - for (char *I = Buffer; I + 1 < End; I++) + + // extract the message(s) from the buffer + char const *Start = Buffer; + char const * const End = Buffer + Res; + + char const * NL = (char const *) memchr(Start, '\n', End - Start); + if (NL == NULL) { - if (I[1] != '\n' || - (I[0] != '\n' && strncmp(I, "\r\n\r\n", 4) != 0)) - continue; - - // Pull the message out - string Message(Buffer,I-Buffer); - PartialMessage += Message; - - // Fix up the buffer - for (; I < End && (*I == '\n' || *I == '\r'); ++I); - End -= I-Buffer; - memmove(Buffer,I,End-Buffer); - I = Buffer; - - List.push_back(PartialMessage); - PartialMessage.clear(); + // end of buffer: store what we have so far and read new data in + PartialMessage.append(Start, End - Start); + Start = End; } - if (End != Buffer) - { - // If there's text left in the buffer, store it - // in PartialMessage and throw the rest of the buffer - // away. This allows us to handle messages that - // are longer than the static buffer size. - PartialMessage += string(Buffer, End); - End = Buffer; - } else - { - // BUG ALERT: if a message block happens to end at a - // multiple of 64000 characters, this will cause it to - // terminate early, leading to a badly formed block and - // probably crashing the method. However, this is the only - // way we have to find the end of the message block. I have - // an idea of how to fix this, but it will require changes - // to the protocol (essentially to mark the beginning and - // end of the block). - // - // -- dburrows 2008-04-02 - return true; - } + ++NL; + + if (PartialMessage.empty() == false && Start < End) + { + // if we start with a new line, see if the partial message we have ended with one + // so that we properly detect records ending between two read() runs + // cases are: \n|\n , \r\n|\r\n and \r\n\r|\n + // the case \r|\n\r\n is handled by the usual double-newline handling + if ((NL - Start) == 1 || ((NL - Start) == 2 && *Start == '\r')) + { + if (APT::String::Endswith(PartialMessage, "\n") || APT::String::Endswith(PartialMessage, "\r\n\r")) + { + PartialMessage.erase(PartialMessage.find_last_not_of("\r\n") + 1); + List.push_back(PartialMessage); + PartialMessage.clear(); + while (NL < End && (*NL == '\n' || *NL == '\r')) ++NL; + Start = NL; + } + } + } + + while (Start < End) { + char const * NL2 = (char const *) memchr(NL, '\n', End - NL); + if (NL2 == NULL) + { + // end of buffer: store what we have so far and read new data in + PartialMessage.append(Start, End - Start); + break; + } + ++NL2; + + // did we find a double newline? + if ((NL2 - NL) == 1 || ((NL2 - NL) == 2 && *NL == '\r')) + { + PartialMessage.append(Start, NL2 - Start); + PartialMessage.erase(PartialMessage.find_last_not_of("\r\n") + 1); + List.push_back(PartialMessage); + PartialMessage.clear(); + while (NL2 < End && (*NL2 == '\n' || *NL2 == '\r')) ++NL2; + Start = NL2; + } + NL = NL2; + } + + // we have read at least one complete message and nothing left + if (PartialMessage.empty() == true) + return true; if (WaitFd(Fd) == false) return false; - } + } while (true); } /*}}}*/ // MonthConv - Converts a month string into a number /*{{{*/ @@ -1034,7 +1065,7 @@ 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 +1078,23 @@ 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 */ @@ -1184,7 +1232,7 @@ 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; @@ -1260,10 +1308,12 @@ void ioprintf(ostream &out,const char *format,...) va_list args; ssize_t size = 400; while (true) { + bool ret; va_start(args,format); - if (iovprintf(out, format, args, size) == true) - return; + ret = iovprintf(out, format, args, size); va_end(args); + if (ret == true) + return; } } void strprintf(string &out,const char *format,...) @@ -1272,10 +1322,12 @@ void strprintf(string &out,const char *format,...) ssize_t size = 400; std::ostringstream outstr; while (true) { + bool ret; va_start(args,format); - if (iovprintf(outstr, format, args, size) == true) - break; + ret = iovprintf(outstr, format, args, size); va_end(args); + if (ret == true) + break; } out = outstr.str(); } @@ -1360,7 +1412,7 @@ size_t strv_length(const char **str_array) ; return i; } - + /*}}}*/ // DeEscapeString - unescape (\0XX and \xXX) from a string /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -1542,56 +1594,49 @@ void URI::CopyFrom(const string &U) /* */ URI::operator string() { - string Res; - + std::stringstream Res; + if (Access.empty() == false) - Res = Access + ':'; - + Res << Access << ':'; + if (Host.empty() == false) - { + { if (Access.empty() == false) - Res += "//"; - + Res << "//"; + if (User.empty() == false) { // FIXME: Technically userinfo is permitted even less // characters than these, but this is not conveniently // expressed with a blacklist. - Res += QuoteString(User, ":/?#[]@"); + Res << QuoteString(User, ":/?#[]@"); if (Password.empty() == false) - Res += ":" + QuoteString(Password, ":/?#[]@"); - Res += "@"; + Res << ":" << QuoteString(Password, ":/?#[]@"); + Res << "@"; } - + // Add RFC 2732 escaping characters - if (Access.empty() == false && - (Host.find('/') != string::npos || Host.find(':') != string::npos)) - Res += '[' + Host + ']'; + if (Access.empty() == false && Host.find_first_of("/:") != string::npos) + Res << '[' << Host << ']'; else - Res += Host; - + Res << Host; + if (Port != 0) - { - char S[30]; - sprintf(S,":%u",Port); - Res += S; - } + Res << ':' << Port; } - + if (Path.empty() == false) { if (Path[0] != '/') - Res += "/" + Path; + Res << "/" << Path; else - Res += Path; + Res << Path; } - - return Res; + + return Res.str(); } /*}}}*/ // URI::SiteOnly - Return the schema and site for the URI /*{{{*/ -// --------------------------------------------------------------------- -/* */ string URI::SiteOnly(const string &URI) { ::URI U(URI); @@ -1601,9 +1646,18 @@ string URI::SiteOnly(const string &URI) return U; } /*}}}*/ +// URI::ArchiveOnly - Return the schema, site and cleaned path for the URI /*{{{*/ +string URI::ArchiveOnly(const string &URI) +{ + ::URI U(URI); + U.User.clear(); + U.Password.clear(); + if (U.Path.empty() == false && U.Path[U.Path.length() - 1] == '/') + U.Path.erase(U.Path.length() - 1); + return U; +} + /*}}}*/ // URI::NoUserPassword - Return the schema, site and path for the URI /*{{{*/ -// --------------------------------------------------------------------- -/* */ string URI::NoUserPassword(const string &URI) { ::URI U(URI);