31 lines
836 B
C++
31 lines
836 B
C++
#include "StringHelper.hpp"
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#include <stdexcept>
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namespace Unvirt::StringHelper {
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void StdstringPrintf(std::string& strl, const char* format, ...) {
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va_list argptr;
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va_start(argptr, format);
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StdstringVPrintf(strl, format, argptr);
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va_end(argptr);
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}
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void StdstringVPrintf(std::string& strl, const char* format, va_list argptr) {
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va_list args1;
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va_copy(args1, argptr);
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va_list args2;
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va_copy(args2, argptr);
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int count = std::vsnprintf(nullptr, 0, format, args1);
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if (count < 0) throw new std::length_error("Invalid length returned by vsnprintf.");
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va_end(args1);
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strl.resize(count);
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int write_result = std::vsnprintf(strl.data(), strl.size() + 1, format, args2);
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va_end(args2);
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if (write_result < 0 || write_result > count) throw new std::length_error("Invalid write result in vsnprintf.");
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}
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}
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