From 537032d2855de03ad143dba9538ec8d7482ce9b5 Mon Sep 17 00:00:00 2001
From: Norihiro Watanabe <norihiro.watanabe@ufz.de>
Date: Fri, 10 Jun 2016 12:29:02 +0200
Subject: [PATCH] add format() in StringTools
---
BaseLib/StringTools.cpp | 22 ++++++++++++++++++++--
BaseLib/StringTools.h | 3 +++
2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/BaseLib/StringTools.cpp b/BaseLib/StringTools.cpp
index 88a0e721863..67694745465 100644
--- a/BaseLib/StringTools.cpp
+++ b/BaseLib/StringTools.cpp
@@ -16,10 +16,11 @@
#include <algorithm>
#include <cctype>
+#include <cstdarg>
+#include <cstdio>
#include <iomanip>
-#include "logog/include/logog.hpp"
-
+#include <logog/include/logog.hpp>
#include <boost/algorithm/string/replace.hpp>
namespace BaseLib
@@ -77,6 +78,23 @@ std::string const& tostring(std::string const& value)
return value;
}
+std::string format(const char* format_str, ... )
+{
+ va_list args;
+ va_start(args, format_str);
+ // get the number of chars to write
+ va_list args_tmp;
+ va_copy(args_tmp, args);
+ int char_length = std::vsnprintf(nullptr, 0, format_str, args_tmp);
+ va_end(args_tmp);
+ // allocate buffer and store formatted output there
+ std::vector<char> buffer(char_length + 1); // note +1 for null terminator
+ vsnprintf(buffer.data(), buffer.size(), format_str, args);
+ va_end(args);
+
+ return std::string(buffer.data());
+}
+
} // end namespace BaseLib
#ifdef MSVC
diff --git a/BaseLib/StringTools.h b/BaseLib/StringTools.h
index 8c379026958..7ff25e9b5f4 100644
--- a/BaseLib/StringTools.h
+++ b/BaseLib/StringTools.h
@@ -79,6 +79,9 @@ template<typename T> std::string tostring(T const& value)
//! \overload
std::string const& tostring(std::string const& value);
+//! returns printf-like formatted string
+std::string format(const char* format_string, ... );
+
} // end namespace BaseLib
#ifdef MSVC
--
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