mirror of https://github.com/axmolengine/axmol.git
64 lines
1.4 KiB
C++
64 lines
1.4 KiB
C++
#include "config.h"
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#include "eax_exception.h"
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#include <cassert>
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#include <string>
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EaxException::EaxException(
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const char* context,
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const char* message)
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:
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std::runtime_error{make_message(context, message)}
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{
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}
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std::string EaxException::make_message(
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const char* context,
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const char* message)
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{
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const auto context_size = (context ? std::string::traits_type::length(context) : 0);
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const auto has_contex = (context_size > 0);
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const auto message_size = (message ? std::string::traits_type::length(message) : 0);
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const auto has_message = (message_size > 0);
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if (!has_contex && !has_message)
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{
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return std::string{};
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}
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static constexpr char left_prefix[] = "[";
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const auto left_prefix_size = std::string::traits_type::length(left_prefix);
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static constexpr char right_prefix[] = "] ";
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const auto right_prefix_size = std::string::traits_type::length(right_prefix);
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const auto what_size =
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(
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has_contex ?
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left_prefix_size + context_size + right_prefix_size :
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0) +
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message_size +
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1;
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auto what = std::string{};
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what.reserve(what_size);
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if (has_contex)
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{
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what.append(left_prefix, left_prefix_size);
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what.append(context, context_size);
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what.append(right_prefix, right_prefix_size);
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}
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if (has_message)
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{
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what.append(message, message_size);
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}
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return what;
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}
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