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1 // Copyright (C) 2010, Guy Barrand. All rights 1 // Copyright (C) 2010, Guy Barrand. All rights reserved.
2 // See the file tools.license for terms. 2 // See the file tools.license for terms.
3 3
4 #ifndef tools_sbeg 4 #ifndef tools_sbeg
5 #define tools_sbeg 5 #define tools_sbeg
6 6
7 #include <string> 7 #include <string>
8 8
9 namespace tools { 9 namespace tools {
10 10
11 inline bool is_beg(const std::string& a_s,cons 11 inline bool is_beg(const std::string& a_s,const std::string& a_b,bool a_forward = true){
12 //look if a_s begin with a_b. 12 //look if a_s begin with a_b.
13 std::string::size_type ls = a_s.size(); 13 std::string::size_type ls = a_s.size();
14 std::string::size_type lb = a_b.size(); 14 std::string::size_type lb = a_b.size();
15 if(lb>ls) return false; 15 if(lb>ls) return false;
16 if(!lb) return false; 16 if(!lb) return false;
17 if(a_forward) { 17 if(a_forward) {
18 const char* ps = a_s.c_str(); 18 const char* ps = a_s.c_str();
19 const char* pb = a_b.c_str(); 19 const char* pb = a_b.c_str();
20 for(std::string::size_type index=0;index<l 20 for(std::string::size_type index=0;index<lb;index++,ps++,pb++) {
21 if(*ps!=*pb) return false; 21 if(*ps!=*pb) return false;
22 } 22 }
23 } else { 23 } else {
24 const char* ps = a_s.c_str()+lb-1; 24 const char* ps = a_s.c_str()+lb-1;
25 const char* pb = a_b.c_str()+lb-1; 25 const char* pb = a_b.c_str()+lb-1;
26 for(std::string::size_type index=0;index<l 26 for(std::string::size_type index=0;index<lb;index++,ps--,pb--) {
27 if(*ps!=*pb) return false; 27 if(*ps!=*pb) return false;
28 } 28 }
29 } 29 }
30 return true; 30 return true;
31 } 31 }
32 32
33 inline bool is_beg(const std::string& a_s,cons 33 inline bool is_beg(const std::string& a_s,const std::string& a_b,std::string& a_cmd,bool a_forward = true){
34 if(!tools::is_beg(a_s,a_b,a_forward)) {a_cmd 34 if(!tools::is_beg(a_s,a_b,a_forward)) {a_cmd.clear();return false;}
35 if(a_s.size()<(a_b.size()+1)) {a_cmd.clear() 35 if(a_s.size()<(a_b.size()+1)) {a_cmd.clear();return true;}
36 // a_s.size() >= a_b.size()+1 : 36 // a_s.size() >= a_b.size()+1 :
37 a_cmd = a_s.substr(a_b.size()+1,a_s.size()-( 37 a_cmd = a_s.substr(a_b.size()+1,a_s.size()-(a_b.size()+1));
38 return true; 38 return true;
39 } 39 }
40 40
41 } 41 }
42 42
43 #endif 43 #endif