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optimize string_printf

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This commit is contained in:
tamasmeszaros 2020-02-03 17:11:24 +01:00
parent c6310e49b3
commit ad3e3be3bc
1 changed files with 5 additions and 3 deletions
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8
src/libslic3r/utils.cpp
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@ -585,8 +585,8 @@ std::string string_printf(const char *format, ...)
va_list args2; va_list args2;
va_copy(args2, args1); va_copy(args2, args1);
static const size_t INITIAL_LEN = 1024; static const size_t INITIAL_LEN = 200;
std::vector<char> buffer(INITIAL_LEN, '\0'); std::string buffer(INITIAL_LEN, '\0');
int bufflen = ::vsnprintf(buffer.data(), INITIAL_LEN - 1, format, args1); int bufflen = ::vsnprintf(buffer.data(), INITIAL_LEN - 1, format, args1);
@ -595,7 +595,9 @@ std::string string_printf(const char *format, ...)
::vsnprintf(buffer.data(), buffer.size(), format, args2); ::vsnprintf(buffer.data(), buffer.size(), format, args2);
} }
return std::string(buffer.begin(), buffer.begin() + bufflen); buffer.resize(bufflen);
return buffer;
} }
std::string header_slic3r_generated() std::string header_slic3r_generated()