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0001 // Copyright (C) 2010, Guy Barrand. All rights reserved.
0002 // See the file tools.license for terms.
0003
0004 #ifndef tools_words
0005 #define tools_words
0006
0007 #include <string>
0008 #include <vector>
0009
0010 namespace tools {
0011
0012 inline void words(const std::string& a_string,const std::string& a_sep,bool a_take_empty,
0013                   std::vector<std::string>& a_words,bool a_clear = true){
0014   //  If a_sep is for exa "|" and for "xxx||xxx" :
0015   //  - a_take_empty false : {"xxx","xxx"} will be created
0016   //    (and NOT {"xxx","","xxx"}).
0017   //  - a_take_empty true : {"xxx","","xxx"} will be created.
0018   if(a_clear) a_words.clear();
0019   if(a_string.empty()) return;
0020   std::string::size_type lim = (a_take_empty?0:1);
0021   if(a_sep.empty()) {
0022     a_words.push_back(a_string);
0023   } else {
0024     std::string::size_type l = a_string.length();
0025     std::string::size_type llimiter = a_sep.length();
0026     std::string::size_type pos = 0;
0027     while(true) {
0028       std::string::size_type index = a_string.find(a_sep,pos);
0029       if(index==std::string::npos){ // Last word.
0030         if((l-pos)>=lim) a_words.push_back(a_string.substr(pos,l-pos));
0031         break;
0032       } else {
0033         //     abcxxxef
0034         //     0  3  67
0035         if((index-pos)>=lim) a_words.push_back(a_string.substr(pos,index-pos));
0036         pos = index + llimiter;
0037       }
0038     }
0039   }
0040 }
0041
0042 #ifdef TOOLS_DEPRECATED
0043 inline std::vector<std::string> words(const std::string& a_string,const std::string& a_limiter,bool a_take_empty = false){
0044   std::vector<std::string> v;
0045   words(a_string,a_limiter,a_take_empty,v);
0046   return v;
0047 }
0048 #endif //TOOLS_DEPRECATED
0049
0050 inline void words(const std::string& a_string,
0051                   const std::string& a_sep,bool a_take_empty,
0052                   //output :
0053                   unsigned int& a_wn,
0054                   std::string::size_type a_wps[],
0055                   std::string::size_type a_wls[]){
0056   //used to optimize tools::match().
0057   a_wn = 0;
0058   if(a_string.empty()) return;
0059   std::string::size_type lim = (a_take_empty?0:1);
0060   if(a_sep.empty()) {
0061     //a_words.push_back(a_string);
0062     a_wps[a_wn] = 0;
0063     a_wls[a_wn] = a_string.length();
0064     a_wn++;
0065   } else {
0066     std::string::size_type l = a_string.length();
0067     std::string::size_type llimiter = a_sep.length();
0068     std::string::size_type pos = 0;
0069     while(true) {
0070       std::string::size_type index = a_string.find(a_sep,pos);
0071       if(index==std::string::npos){ // Last word.
0072         if((l-pos)>=lim) {
0073           //a_words.push_back(a_string.substr(pos,l-pos));
0074           a_wps[a_wn] = pos;
0075           a_wls[a_wn] = l-pos;
0076           a_wn++;
0077         }
0078         break;
0079       } else {
0080         //     abcxxxef
0081         //     0  3  67
0082         if((index-pos)>=lim) {
0083           //a_words.push_back(a_string.substr(pos,index-pos));
0084           a_wps[a_wn] = pos;
0085           a_wls[a_wn] = index-pos;
0086           a_wn++;
0087         }
0088         pos = index + llimiter;
0089       }
0090     }
0091   }
0092 }
0093
0094 }
0095
0096 #endif