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Diffstat (limited to 'apt-pkg/contrib/strutl.h')
| -rw-r--r-- | apt-pkg/contrib/strutl.h | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/apt-pkg/contrib/strutl.h b/apt-pkg/contrib/strutl.h new file mode 100644 index 0000000..7cf9b45 --- /dev/null +++ b/apt-pkg/contrib/strutl.h @@ -0,0 +1,252 @@ +// -*- mode: cpp; mode: fold -*- +// SPDX-License-Identifier: GPL-2.0+ +// Description /*{{{*/ +/* ###################################################################### + + String Util - These are some useful string functions + + _strstrip is a function to remove whitespace from the front and end + of a string. + + This file had this historic note, but now includes further changes + under the GPL-2.0+: + + This source is placed in the Public Domain, do with it what you will + It was originally written by Jason Gunthorpe <jgg@gpu.srv.ualberta.ca> + + ##################################################################### */ + /*}}}*/ +#ifndef STRUTL_H +#define STRUTL_H + +#include <apt-pkg/string_view.h> +#include <cstddef> +#include <cstring> +#include <ctime> +#include <iostream> +#include <limits> +#include <string> +#include <vector> + +#include "macros.h" + + +namespace APT { + namespace String { + APT_PUBLIC std::string Strip(const std::string &s); + APT_PUBLIC bool Endswith(const std::string &s, const std::string &ending); + APT_PUBLIC bool Startswith(const std::string &s, const std::string &starting); + APT_PUBLIC std::string Join(std::vector<std::string> list, const std::string &sep); + // Returns string display length honoring multi-byte characters + APT_PUBLIC size_t DisplayLength(StringView str); + } +} + + +APT_PUBLIC bool UTF8ToCodeset(const char *codeset, const std::string &orig, std::string *dest); +APT_PUBLIC char *_strstrip(char *String); +APT_PUBLIC char *_strrstrip(char *String); // right strip only +APT_DEPRECATED_MSG("Use SubstVar to avoid memory headaches") APT_PUBLIC char *_strtabexpand(char *String,size_t Len); +APT_PUBLIC bool ParseQuoteWord(const char *&String,std::string &Res); +APT_PUBLIC bool ParseCWord(const char *&String,std::string &Res); +APT_PUBLIC std::string QuoteString(const std::string &Str,const char *Bad); +APT_PUBLIC std::string DeQuoteString(const std::string &Str); +APT_PUBLIC std::string DeQuoteString(std::string::const_iterator const &begin, std::string::const_iterator const &end); + +// unescape (\0XX and \xXX) from a string +APT_PUBLIC std::string DeEscapeString(const std::string &input); + +APT_PUBLIC std::string SizeToStr(double Bytes); +APT_PUBLIC std::string TimeToStr(unsigned long Sec); +APT_PUBLIC std::string Base64Encode(const std::string &Str); +APT_PUBLIC std::string OutputInDepth(const unsigned long Depth, const char* Separator=" "); +APT_PUBLIC std::string URItoFileName(const std::string &URI); +/** returns a datetime string as needed by HTTP/1.1 and Debian files. + * + * Note: The date will always be represented in a UTC timezone + * + * @param Date to be represented as a string + * @param NumericTimezone is preferred in general, but HTTP/1.1 requires the use + * of GMT as timezone instead. \b true means that the timezone should be denoted + * as "+0000" while \b false uses "GMT". + */ +APT_PUBLIC std::string TimeRFC1123(time_t Date, bool const NumericTimezone); +/** parses time as needed by HTTP/1.1 and Debian files. + * + * HTTP/1.1 prefers dates in RFC1123 format (but the other two obsolete date formats + * are supported to) and e.g. Release files use the same format in Date & Valid-Until + * fields. + * + * Note: datetime strings need to be in UTC timezones (GMT, UTC, Z, +/-0000) to be + * parsed. Other timezones will be rejected as invalid. Previous implementations + * accepted other timezones, but treated them as UTC. + * + * @param str is the datetime string to parse + * @param[out] time will be the seconds since epoch of the given datetime if + * parsing is successful, undefined otherwise. + * @return \b true if parsing was successful, otherwise \b false. + */ +APT_PUBLIC bool RFC1123StrToTime(const std::string &str,time_t &time) APT_MUSTCHECK; +APT_PUBLIC bool FTPMDTMStrToTime(const char* const str,time_t &time) APT_MUSTCHECK; +APT_PUBLIC std::string LookupTag(const std::string &Message,const char *Tag,const char *Default = 0); +APT_PUBLIC int StringToBool(const std::string &Text,int Default = -1); +APT_PUBLIC bool ReadMessages(int Fd, std::vector<std::string> &List); +APT_PUBLIC bool StrToNum(const char *Str,unsigned long &Res,unsigned Len,unsigned Base = 0); +APT_PUBLIC bool StrToNum(const char *Str,unsigned long long &Res,unsigned Len,unsigned Base = 0); +APT_PUBLIC bool Base256ToNum(const char *Str,unsigned long &Res,unsigned int Len); +APT_PUBLIC bool Base256ToNum(const char *Str,unsigned long long &Res,unsigned int Len); +APT_PUBLIC bool Hex2Num(const APT::StringView Str,unsigned char *Num,unsigned int Length); +// input changing string split +APT_PUBLIC bool TokSplitString(char Tok,char *Input,char **List, + unsigned long ListMax); + +// split a given string by a char +APT_PUBLIC std::vector<std::string> VectorizeString(std::string const &haystack, char const &split) APT_PURE; + +/* \brief Return a vector of strings from string "input" where "sep" + * is used as the delimiter string. + * + * \param input The input string. + * + * \param sep The separator to use. + * + * \param maxsplit (optional) The maximum amount of splitting that + * should be done . + * + * The optional "maxsplit" argument can be used to limit the splitting, + * if used the string is only split on maxsplit places and the last + * item in the vector contains the remainder string. + */ +APT_PUBLIC std::vector<std::string> StringSplit(std::string const &input, + std::string const &sep, + unsigned int maxsplit=std::numeric_limits<unsigned int>::max()) APT_PURE; + + +APT_HIDDEN bool iovprintf(std::ostream &out, const char *format, va_list &args, ssize_t &size); +APT_PUBLIC void ioprintf(std::ostream &out,const char *format,...) APT_PRINTF(2); +APT_PUBLIC void strprintf(std::string &out,const char *format,...) APT_PRINTF(2); +APT_PUBLIC char *safe_snprintf(char *Buffer,char *End,const char *Format,...) APT_PRINTF(3); +APT_PUBLIC bool CheckDomainList(const std::string &Host, const std::string &List); + +/* Do some compat mumbo jumbo */ +#define tolower_ascii tolower_ascii_inline +#define isspace_ascii isspace_ascii_inline + +APT_PURE APT_HOT +static inline int tolower_ascii_unsafe(int const c) +{ + return c | 0x20; +} +APT_PURE APT_HOT +static inline int tolower_ascii_inline(int const c) +{ + return (c >= 'A' && c <= 'Z') ? c + 32 : c; +} +APT_PURE APT_HOT +static inline int isspace_ascii_inline(int const c) +{ + // 9='\t',10='\n',11='\v',12='\f',13='\r',32=' ' + return (c >= 9 && c <= 13) || c == ' '; +} +APT_PURE APT_HOT +static inline int islower_ascii(int const c) +{ + return c >= 'a' && c <= 'z'; +} +APT_PURE APT_HOT +static inline int isupper_ascii(int const c) +{ + return c >= 'A' && c <= 'Z'; +} +APT_PURE APT_HOT +static inline int isalpha_ascii(int const c) +{ + return isupper_ascii(c) || islower_ascii(c); +} + +APT_PUBLIC std::string StripEpoch(const std::string &VerStr); + +#define APT_MKSTRCMP(name,func) \ +inline APT_PURE int name(const char *A,const char *B) {return func(A,A+strlen(A),B,B+strlen(B));} \ +inline APT_PURE int name(const char *A,const char *AEnd,const char *B) {return func(A,AEnd,B,B+strlen(B));} \ +inline APT_PURE int name(const std::string& A,const char *B) {return func(A.c_str(),A.c_str()+A.length(),B,B+strlen(B));} \ +inline APT_PURE 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());} \ +inline APT_PURE int name(const std::string& A,const char *B,const char *BEnd) {return func(A.c_str(),A.c_str()+A.length(),B,BEnd);} + +#define APT_MKSTRCMP2(name,func) \ +inline APT_PURE int name(const char *A,const char *AEnd,const char *B) {return func(A,AEnd,B,B+strlen(B));} \ +inline APT_PURE int name(const std::string& A,const char *B) {return func(A.begin(),A.end(),B,B+strlen(B));} \ +inline APT_PURE int name(const std::string& A,const std::string& B) {return func(A.begin(),A.end(),B.begin(),B.end());} \ +inline APT_PURE int name(const std::string& A,const char *B,const char *BEnd) {return func(A.begin(),A.end(),B,BEnd);} + +APT_PUBLIC int APT_PURE stringcmp(const char *A,const char *AEnd,const char *B,const char *BEnd); +APT_PUBLIC int APT_PURE stringcasecmp(const char *A,const char *AEnd,const char *B,const char *BEnd); + +/* We assume that GCC 3 indicates that libstdc++3 is in use too. In that + case the definition of string::const_iterator is not the same as + const char * and we need these extra functions */ +#if __GNUC__ >= 3 +APT_PUBLIC int APT_PURE stringcmp(std::string::const_iterator A,std::string::const_iterator AEnd, + const char *B,const char *BEnd); +APT_PUBLIC int APT_PURE stringcmp(std::string::const_iterator A,std::string::const_iterator AEnd, + std::string::const_iterator B,std::string::const_iterator BEnd); +APT_PUBLIC int APT_PURE stringcasecmp(std::string::const_iterator A,std::string::const_iterator AEnd, + const char *B,const char *BEnd); +APT_PUBLIC int APT_PURE stringcasecmp(std::string::const_iterator A,std::string::const_iterator AEnd, + std::string::const_iterator B,std::string::const_iterator BEnd); + +inline APT_PURE int stringcmp(std::string::const_iterator A,std::string::const_iterator Aend,const char *B) {return stringcmp(A,Aend,B,B+strlen(B));} +inline APT_PURE int stringcasecmp(std::string::const_iterator A,std::string::const_iterator Aend,const char *B) {return stringcasecmp(A,Aend,B,B+strlen(B));} +#endif + +APT_MKSTRCMP2(stringcmp,stringcmp) +APT_MKSTRCMP2(stringcasecmp,stringcasecmp) + +// Return the length of a NULL-terminated string array +APT_PUBLIC size_t APT_PURE strv_length(const char **str_array); + + +inline const char *DeNull(const char *s) {return (s == 0?"(null)":s);} + +class APT_PUBLIC URI +{ + void CopyFrom(const std::string &From); + + public: + + std::string Access; + std::string User; + std::string Password; + std::string Host; + std::string Path; + unsigned int Port; + + operator std::string(); + inline void operator =(const std::string &From) {CopyFrom(From);} + inline bool empty() {return Access.empty();}; + static std::string SiteOnly(const std::string &URI); + static std::string ArchiveOnly(const std::string &URI); + static std::string NoUserPassword(const std::string &URI); + + explicit URI(std::string Path) { CopyFrom(Path); } + URI() : Port(0) {} +}; + +struct SubstVar +{ + const char *Subst; + const std::string *Contents; +}; +APT_PUBLIC std::string SubstVar(std::string Str,const struct SubstVar *Vars); +APT_PUBLIC std::string SubstVar(const std::string &Str,const std::string &Subst,const std::string &Contents); + +struct RxChoiceList +{ + void *UserData; + const char *Str; + bool Hit; +}; +APT_PUBLIC unsigned long RegexChoice(RxChoiceList *Rxs,const char **ListBegin, + const char **ListEnd); + +#endif |