Add the full source of BambuStudio

using version 1.0.10

src/boost/nowide/cenv.hpp

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+//
+//  Copyright (c) 2012 Artyom Beilis (Tonkikh)
+//
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+#ifndef BOOST_NOWIDE_CENV_H_INCLUDED
+#define BOOST_NOWIDE_CENV_H_INCLUDED
+
+#include <string>
+#include <stdexcept>
+#include <stdlib.h>
+#include <boost/config.hpp>
+#include <boost/nowide/stackstring.hpp>
+#include <vector>
+
+#ifdef BOOST_WINDOWS
+#include <boost/nowide/windows.hpp>
+#endif
+
+namespace boost {
+namespace nowide {
+    #if !defined(BOOST_WINDOWS) && !defined(BOOST_NOWIDE_DOXYGEN)
+    using ::getenv;
+    using ::setenv;
+    using ::unsetenv;
+    using ::putenv;
+    #else
+    ///
+    /// \brief UTF-8 aware getenv. Returns 0 if the variable is not set.
+    ///
+    /// This function is not thread safe or reenterable as defined by the standard library
+    ///
+    inline char *getenv(char const *key)
+    {
+        static stackstring value;
+        
+        wshort_stackstring name;
+        if(!name.convert(key))
+            return 0;
+
+        static const size_t buf_size = 64;
+        wchar_t buf[buf_size];
+        std::vector<wchar_t> tmp;
+        wchar_t *ptr = buf;
+        size_t n = GetEnvironmentVariableW(name.c_str(),buf,buf_size);
+        if(n == 0 && GetLastError() == 203) // ERROR_ENVVAR_NOT_FOUND
+            return 0;
+        if(n >= buf_size) {
+            tmp.resize(n+1,L'\0');
+            n = GetEnvironmentVariableW(name.c_str(),&tmp[0],static_cast<unsigned>(tmp.size() - 1));
+            // The size may have changed
+            if(n >= tmp.size() - 1)
+                return 0;
+            ptr = &tmp[0];
+        }
+        if(!value.convert(ptr))
+            return 0;
+        return value.c_str();
+    }
+    ///
+    /// \brief  UTF-8 aware setenv, \a key - the variable name, \a value is a new UTF-8 value,
+    /// 
+    /// if override is not 0, that the old value is always overridded, otherwise,
+    /// if the variable exists it remains unchanged
+    ///
+    inline int setenv(char const *key,char const *value,int override)
+    {
+        wshort_stackstring name;
+        if(!name.convert(key))
+            return -1;
+        if(!override) {
+            wchar_t unused[2];
+            if(!(GetEnvironmentVariableW(name.c_str(),unused,2)==0 && GetLastError() == 203)) // ERROR_ENVVAR_NOT_FOUND
+                return 0;
+        }
+        wstackstring wval;
+        if(!wval.convert(value))
+            return -1;
+        if(SetEnvironmentVariableW(name.c_str(),wval.c_str()))
+            return 0;
+        return -1;
+    }
+    ///
+    /// \brief Remove enviroment variable \a key
+    ///
+    inline int unsetenv(char const *key)
+    {
+        wshort_stackstring name;
+        if(!name.convert(key))
+            return -1;
+        if(SetEnvironmentVariableW(name.c_str(),0))
+            return 0;
+        return -1;
+    }
+    ///
+    /// \brief UTF-8 aware putenv implementation, expects string in format KEY=VALUE
+    ///
+    inline int putenv(char *string)
+    {
+        char const *key = string;
+        char const *key_end = string;
+        while(*key_end != '=' && *key_end != 0)
+            ++ key_end;
+        if(*key_end == 0)
+            return -1;
+        wshort_stackstring wkey;
+        if(!wkey.convert(key,key_end))
+            return -1;
+        wstackstring wvalue;
+        if(!wvalue.convert(key_end+1))
+            return -1;
+        if(SetEnvironmentVariableW(wkey.c_str(),wvalue.c_str()))
+            return 0;
+        return -1;
+    }
+    #endif
+} // nowide
+} // namespace boost
+
+#endif
+///
+// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4