Gabriele Cosmo
83 lines
1.9 KiB
Plaintext
83 lines
1.9 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_sprintf
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#define tools_sprintf
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#include <string>
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#include "snpf"
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namespace tools {
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inline bool vsprintf(std::string& a_string,int a_length,const char* a_format,va_list a_args){
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a_string.clear();
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if(a_length<0) return false;
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if(!a_format) return false;
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char* _s = new char[a_length+1];
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if(!_s) return false;
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_s[a_length] = '\0';
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int n = vsnpf(_s,a_length+1,a_format,a_args);
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if(n>a_length) {
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delete [] _s;
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return false;
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}
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if(_s[a_length]!='\0') {
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delete [] _s;
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return false;
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}
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a_string = _s;
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delete [] _s;
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return true;
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}
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inline bool sprintf(std::string& a_string,int a_length,const char* a_format,...){
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a_string.clear();
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if(a_length<0) return false;
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if(!a_format) return false;
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char* _s = new char[a_length+1];
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if(!_s) return false;
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_s[a_length] = '\0';
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va_list args;
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va_start(args,a_format);
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int n = vsnpf(_s,a_length+1,a_format,args);
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va_end(args);
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if(n>a_length) {
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delete [] _s;
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return false;
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}
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if(_s[a_length]!='\0') {
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delete [] _s;
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return false;
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}
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a_string = _s;
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delete [] _s;
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return true;
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}
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inline bool print2s(std::string& a_string,int a_length,const char* a_format,...){
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if(a_length<0) {a_string.clear();return false;}
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if(!a_format) {a_string.clear();return false;}
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a_string.assign(a_length,' '); //data = a_length+1
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char* _s = const_cast<char*>(a_string.c_str());
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//_s[a_length] shoulg be '\0'.
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va_list args;
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va_start(args,a_format);
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int n = vsnpf(_s,a_length+1,a_format,args);
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va_end(args);
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if(n>a_length) { //a_string is compromised.
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a_string.clear(); //we cross fingers.
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return false;
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}
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if(_s[a_length]!='\0') { //a_string is compromised.
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a_string.clear(); //we cross fingers.
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return false;
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}
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a_string.resize(n);
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return true;
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}
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}
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#endif
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