Gabriele Cosmo
44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
// Copyright (C) 2010, Guy Barrand. All rights reserved.
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// See the file tools.license for terms.
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#ifndef tools_sbeg
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#define tools_sbeg
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#include <string>
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namespace tools {
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inline bool is_beg(const std::string& a_s,const std::string& a_b,bool a_forward = true){
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//look if a_s begin with a_b.
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std::string::size_type ls = a_s.size();
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std::string::size_type lb = a_b.size();
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if(lb>ls) return false;
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if(!lb) return false;
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if(a_forward) {
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const char* ps = a_s.c_str();
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const char* pb = a_b.c_str();
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for(std::string::size_type index=0;index<lb;index++,ps++,pb++) {
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if(*ps!=*pb) return false;
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}
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} else {
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const char* ps = a_s.c_str()+lb-1;
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const char* pb = a_b.c_str()+lb-1;
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for(std::string::size_type index=0;index<lb;index++,ps--,pb--) {
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if(*ps!=*pb) return false;
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}
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}
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return true;
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}
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inline bool is_beg(const std::string& a_s,const std::string& a_b,std::string& a_cmd,bool a_forward = true){
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if(!tools::is_beg(a_s,a_b,a_forward)) {a_cmd.clear();return false;}
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if(a_s.size()<(a_b.size()+1)) {a_cmd.clear();return true;}
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// a_s.size() >= a_b.size()+1 :
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a_cmd = a_s.substr(a_b.size()+1,a_s.size()-(a_b.size()+1));
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return true;
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}
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}
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#endif
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