67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
#include <string>
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#include <sstream>
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#include <stdarg.h>
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#include "UsefulException.hpp"
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#include "../dependencies/kerep/src/base/base.h"
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std::string _format(const std::string format_str, size_t args_count, ...){
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va_list vl;
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va_start(vl, args_count);
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std::stringstream ss;
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for(size_t i = 0; i < format_str.length(); i++){
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char c = format_str[i];
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// format specifier
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if(c == '%'){
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c = format_str[++i];
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bool l = false;
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while(c == 'l'){
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l = true;
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c = format_str[++i];
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}
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switch(c){
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case 'u':
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if(l) ss<<(u64)va_arg(vl, u64);
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else ss<<(u32)va_arg(vl, u32);
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break;
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case 'i':
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case 'd':
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if(l) ss<<(i64)va_arg(vl, i64);
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else ss<<(i32)va_arg(vl, i32);
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break;
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case 'f':
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// f32 is promoted to f64 when passed through '...'
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ss<<(f64)va_arg(vl, f64);
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break;
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case 'p':
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ss<<(void*)va_arg(vl, void*);
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break;
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case 'x':
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if(l) ss<<std::hex<<(u64)va_arg(vl, u64);
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else ss<<std::hex<<(u32)va_arg(vl, u32);
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break;
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case 's': {
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const char* cptr = va_arg(vl,char*);
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if(cptr != nullptr)
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ss<<cptr;
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else ss<<"<nullptr>";
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break;
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}
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case 'c':
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ss<<(char)va_arg(vl,int);
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break;
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default:
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throw UsefulException("invalid format cpecifier");
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}
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}
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// regular character
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else ss<<c;
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}
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va_end(vl);
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return ss.str();
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}
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