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Add a diagnostic hint to input stream error #318

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Add a diagnostic hint to input stream error #318

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cdd8dee
Add a diagnostic hint to input stream error
stephen-webb Aug 2, 2024
87e1965
Use snprintf instead of itoa
stephen-webb Jul 30, 2026
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11 changes: 9 additions & 2 deletions include/boost/archive/basic_text_iprimitive.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@

#include <locale>
#include <cstddef> // size_t
#include <stdio.h> // snprintf

#include <boost/config.hpp>
#if defined(BOOST_NO_STDC_NAMESPACE)
Expand Down Expand Up @@ -86,11 +87,17 @@ class BOOST_SYMBOL_VISIBLE basic_text_iprimitive {
template<class T>
void load(T & t)
{
auto pos = is.tellg();
if(is >> t)
return;
char at_offset[64] = "at offset ";
if (std::streampos(-1) == pos)
snprintf&at_offset[10], 54, "%s", "<unknown>");
else
snprintf(&at_offset[10], 54, "%d", static_cast<std::streamoff>(pos));
boost::serialization::throw_exception(
archive_exception(archive_exception::input_stream_error)
);
archive_exception(archive_exception::input_stream_error, at_offset)
);
}

void load(char & t)
Expand Down