Start the process of making bc/dc work on Windows

This requires some code to make things match POSIX and especially making
inline an empty string because Microsoft's compiler is picky about
functions marked inline.

24 files changed, 1077 insertions, 105 deletions

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..22d6e60b
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+*.vcxproj eol=crlf
+*.vcxproj.filters eol=crlf
+*.sln eol= crlf
diff --git a/.gitignore b/.gitignore
index 5c2bbae8..b131d581 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,3 +68,7 @@ core.*
 
 cscope*.out
 tags
+
+*.vcxproj.user
+Debug/*
+Release/*
diff --git a/bc.sln b/bc.sln
new file mode 100644
index 00000000..584b28d1
--- /dev/null
+++ b/bc.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31129.286
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bc", "bc.vcxproj", "{D5086CFE-052C-4742-B005-E05DB983BBA2}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Debug|x64.ActiveCfg = Debug|x64
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Debug|x64.Build.0 = Debug|x64
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Debug|x86.ActiveCfg = Debug|Win32
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Debug|x86.Build.0 = Debug|Win32
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Release|x64.ActiveCfg = Release|x64
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Release|x64.Build.0 = Release|x64
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Release|x86.ActiveCfg = Release|Win32
+		{D5086CFE-052C-4742-B005-E05DB983BBA2}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {7869B1FB-A7C4-4FCF-8B99-F696DB2765EC}
+	EndGlobalSection
+EndGlobal
diff --git a/bc.vcxproj b/bc.vcxproj
new file mode 100644
index 00000000..47d92a10
--- /dev/null
+++ b/bc.vcxproj
@@ -0,0 +1,260 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <ProjectGuid>{D5086CFE-052C-4742-B005-E05DB983BBA2}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ItemGroup>
+    <CustomBuild Include="gen\strgen.c">
+      <Message>Building strgen</Message>
+      <Command>CL /Fo:$(Configuration)\$(ProjectName)\ /Fe:$(Configuration)\$(ProjectName)\strgen.exe gen\strgen.c</Command>
+      <Inputs>gen\strgen.c</Inputs>
+      <Outputs>$(Configuration)\$(ProjectName)\strgen.exe</Outputs>
+    </CustomBuild>
+    <CustomBuild Include="gen\lib.bc">
+      <Message>Generating $(Configuration)\$(ProjectName)/lib.c</Message>
+      <Command>START $(Configuration)\$(ProjectName)/strgen gen\lib.bc $(Configuration)\$(ProjectName)/lib.c bc_lib bc_lib_name BC_ENABLED 1</Command>
+      <Inputs>$(Configuration)\$(ProjectName)\strgen.exe;gen\lib.bc</Inputs>
+      <Outputs>$(Configuration)\$(ProjectName)\lib.c</Outputs>
+    </CustomBuild>
+    <CustomBuild Include="gen\lib2.bc">
+      <Message>Generating $(Configuration)\$(ProjectName)/lib2.c</Message>
+      <Command>START $(Configuration)\$(ProjectName)/strgen gen\lib2.bc $(Configuration)\$(ProjectName)/lib2.c bc_lib2 bc_lib2_name BC_ENABLED 1</Command>
+      <Inputs>$(Configuration)\$(ProjectName)\strgen.exe;gen\lib2.bc</Inputs>
+      <Outputs>$(Configuration)\$(ProjectName)\lib2.c</Outputs>
+    </CustomBuild>
+    <CustomBuild Include="gen\bc_help.txt">
+      <Message>Generating $(Configuration)\$(ProjectName)/bc_help.c</Message>
+      <Command>START $(Configuration)\$(ProjectName)/strgen gen\bc_help.txt $(Configuration)\$(ProjectName)\bc_help.c bc_help "" BC_ENABLED</Command>
+      <Inputs>$(Configuration)\$(ProjectName)\strgen.exe;gen\bc_help.txt</Inputs>
+      <Outputs>$(Configuration)\$(ProjectName)\bc_help.c</Outputs>
+    </CustomBuild>
+    <CustomBuild Include="gen\dc_help.txt">
+      <Message>Generating $(Configuration)\$(ProjectName)/dc_help.c</Message>
+      <Command>START $(Configuration)\$(ProjectName)/strgen gen\dc_help.txt $(Configuration)\$(ProjectName)\dc_help.c dc_help "" DC_ENABLED</Command>
+      <Inputs>$(Configuration)\$(ProjectName)\strgen.exe;gen\dc_help.txt</Inputs>
+      <Outputs>$(Configuration)\$(ProjectName)\dc_help.c</Outputs>
+    </CustomBuild>
+  </ItemGroup>
+  <PropertyGroup>
+    <CustomBuildBeforeTargets>ClCompile</CustomBuildBeforeTargets>
+  </PropertyGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=1;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=0;EXECSUFFIX=.exe;BC_BUILD_TYPE=HN</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <Optimization>Disabled</Optimization>
+      <ExceptionHandling>false</ExceptionHandling>
+      <AdditionalOptions>/W3 %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX86</TargetMachine>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;bcrypt.lib;ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=1;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=0;EXECSUFFIX=.exe;BUILD_TYPE=HN</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <Optimization>MaxSpeed</Optimization>
+      <ExceptionHandling>false</ExceptionHandling>
+      <AdditionalOptions>/W3 %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX86</TargetMachine>
+      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;bcrypt.lib;ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=1;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=0;EXECSUFFIX=.exe;BUILD_TYPE=HN</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <Optimization>Disabled</Optimization>
+      <ExceptionHandling>false</ExceptionHandling>
+      <AdditionalOptions>/W3 %(AdditionalOptions)</AdditionalOptions>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX64</TargetMachine>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;bcrypt.lib;ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+    <PostBuildEvent>
+      <Command>copy /b "$(SolutionDir)\$(Configuration)\$(ProjectName)\bc.exe" "$(SolutionDir)\$(Configuration)\$(ProjectName)\dc.exe"</Command>
+    </PostBuildEvent>
+    <PostBuildEvent>
+      <Message>Copying bc to dc...</Message>
+    </PostBuildEvent>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=1;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=0;EXECSUFFIX=.exe;BUILD_TYPE=HN</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <Optimization>MaxSpeed</Optimization>
+      <ExceptionHandling>false</ExceptionHandling>
+      <AdditionalOptions>/W3 %(AdditionalOptions)</AdditionalOptions>
+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX64</TargetMachine>
+      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <SubSystem>Console</SubSystem>
+      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;bcrypt.lib;ucrt.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="$(Configuration)\$(ProjectName)\lib.c" />
+    <ClCompile Include="$(Configuration)\$(ProjectName)\lib2.c" />
+    <ClCompile Include="$(Configuration)\$(ProjectName)\bc_help.c" />
+    <ClCompile Include="$(Configuration)\$(ProjectName)\dc_help.c" />
+    <ClCompile Include="src\args.c" />
+    <ClCompile Include="src\bc.c" />
+    <ClCompile Include="src\bc_lex.c" />
+    <ClCompile Include="src\bc_parse.c" />
+    <ClCompile Include="src\data.c" />
+    <ClCompile Include="src\dc.c" />
+    <ClCompile Include="src\dc_lex.c" />
+    <ClCompile Include="src\dc_parse.c" />
+    <ClCompile Include="src\file.c" />
+    <ClCompile Include="src\history.c" />
+    <ClCompile Include="src\lang.c" />
+    <ClCompile Include="src\lex.c" />
+    <ClCompile Include="src\main.c" />
+    <ClCompile Include="src\num.c" />
+    <ClCompile Include="src\opt.c" />
+    <ClCompile Include="src\parse.c" />
+    <ClCompile Include="src\program.c" />
+    <ClCompile Include="src\rand.c" />
+    <ClCompile Include="src\read.c" />
+    <ClCompile Include="src\vector.c" />
+    <ClCompile Include="src\vm.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\args.h" />
+    <ClInclude Include="include\bc.h" />
+    <ClInclude Include="include\bcl.h" />
+    <ClInclude Include="include\dc.h" />
+    <ClInclude Include="include\file.h" />
+    <ClInclude Include="include\history.h" />
+    <ClInclude Include="include\lang.h" />
+    <ClInclude Include="include\lex.h" />
+    <ClInclude Include="include\library.h" />
+    <ClInclude Include="include\num.h" />
+    <ClInclude Include="include\opt.h" />
+    <ClInclude Include="include\parse.h" />
+    <ClInclude Include="include\program.h" />
+    <ClInclude Include="include\rand.h" />
+    <ClInclude Include="include\read.h" />
+    <ClInclude Include="include\status.h" />
+    <ClInclude Include="include\vector.h" />
+    <ClInclude Include="include\version.h" />
+    <ClInclude Include="include\vm.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="gen\bc_help.txt" />
+    <Text Include="gen\dc_help.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="gen\lib.bc" />
+    <None Include="gen\lib2.bc" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/bc.vcxproj.filters b/bc.vcxproj.filters
new file mode 100644
index 00000000..141ecb80
--- /dev/null
+++ b/bc.vcxproj.filters
@@ -0,0 +1,182 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="src\args.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\bc.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\bc_lex.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\bc_parse.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\data.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\dc.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\dc_lex.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\dc_parse.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\file.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\history.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\lang.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\lex.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\main.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\num.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\opt.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\parse.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\program.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\rand.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\read.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vector.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vm.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="gen\lib.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="gen\lib2.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="gen\bc_help.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="gen\dc_help.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\args.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\bc.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\bcl.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\dc.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\file.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\history.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\lang.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\lex.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\library.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\num.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\opt.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\parse.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\program.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rand.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\read.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\status.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\vector.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\version.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\vm.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <CustomBuild Include="gen\strgen.c">
+      <Filter>Source Files</Filter>
+    </CustomBuild>
+    <CustomBuild Include="gen\lib.bc" />
+    <CustomBuild Include="gen\lib2.bc" />
+    <CustomBuild Include="gen\bc_help.txt" />
+    <CustomBuild Include="gen\dc_help.txt" />
+    <CustomBuild Include="gen\lib.bc" />
+    <CustomBuild Include="gen\lib2.bc" />
+    <CustomBuild Include="gen\bc_help.txt" />
+    <CustomBuild Include="gen\dc_help.txt" />
+  </ItemGroup>
+  <ItemGroup>
+    <Text Include="gen\bc_help.txt">
+      <Filter>Resource Files</Filter>
+    </Text>
+    <Text Include="gen\dc_help.txt">
+      <Filter>Resource Files</Filter>
+    </Text>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="gen\lib.bc">
+      <Filter>Resource Files</Filter>
+    </None>
+    <None Include="gen\lib2.bc">
+      <Filter>Resource Files</Filter>
+    </None>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/bcl.sln b/bcl.sln
new file mode 100644
index 00000000..77009a43
--- /dev/null
+++ b/bcl.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31129.286
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bcl", "bcl.vcxproj", "{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Debug|x64.ActiveCfg = Debug|x64
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Debug|x64.Build.0 = Debug|x64
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Debug|x86.ActiveCfg = Debug|Win32
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Debug|x86.Build.0 = Debug|Win32
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Release|x64.ActiveCfg = Release|x64
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Release|x64.Build.0 = Release|x64
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Release|x86.ActiveCfg = Release|Win32
+		{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {591735E0-C314-4BFF-A595-E9999B49CB25}
+	EndGlobalSection
+EndGlobal
diff --git a/bcl.vcxproj b/bcl.vcxproj
new file mode 100644
index 00000000..3b79c8b9
--- /dev/null
+++ b/bcl.vcxproj
@@ -0,0 +1,161 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <ProjectGuid>{D2CC3DCF-7919-4DEF-839D-E9B897EC3E8E}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v142</PlatformToolset>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>true</LinkIncremental>
+    <OutDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</OutDir>
+    <IntDir>$(SolutionDir)\$(Configuration)\$(ProjectName)\</IntDir>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=0;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=1</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDebugDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <Optimization>Disabled</Optimization>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX86</TargetMachine>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=0;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=1</PreprocessorDefinitions>
+      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
+      <WarningLevel>Level3</WarningLevel>
+      <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <TargetMachine>MachineX86</TargetMachine>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=0;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=1</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include</AdditionalIncludeDirectories>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions);BC_ENABLED=1;DC_ENABLED=1;BC_ENABLE_EXTRA_MATH=1;BC_ENABLE_HISTORY=0;BC_ENABLE_NLS=0;BC_ENABLE_PROMPT=0;BC_DEBUG_CODE=0;BC_ENABLE_LIBRARY=1</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>$(SolutionDir)\include</AdditionalIncludeDirectories>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="src\data.c" />
+    <ClCompile Include="src\library.c" />
+    <ClCompile Include="src\num.c" />
+    <ClCompile Include="src\rand.c" />
+    <ClCompile Include="src\vector.c" />
+    <ClCompile Include="src\vm.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\args.h" />
+    <ClInclude Include="include\bc.h" />
+    <ClInclude Include="include\bcl.h" />
+    <ClInclude Include="include\dc.h" />
+    <ClInclude Include="include\file.h" />
+    <ClInclude Include="include\history.h" />
+    <ClInclude Include="include\lang.h" />
+    <ClInclude Include="include\lex.h" />
+    <ClInclude Include="include\library.h" />
+    <ClInclude Include="include\num.h" />
+    <ClInclude Include="include\opt.h" />
+    <ClInclude Include="include\parse.h" />
+    <ClInclude Include="include\program.h" />
+    <ClInclude Include="include\rand.h" />
+    <ClInclude Include="include\read.h" />
+    <ClInclude Include="include\status.h" />
+    <ClInclude Include="include\vector.h" />
+    <ClInclude Include="include\version.h" />
+    <ClInclude Include="include\vm.h" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/bcl.vcxproj.filters b/bcl.vcxproj.filters
new file mode 100644
index 00000000..f75e0331
--- /dev/null
+++ b/bcl.vcxproj.filters
@@ -0,0 +1,96 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="src\data.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\library.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\num.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\rand.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vector.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\vm.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="include\args.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\bc.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\bcl.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\dc.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\file.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\history.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\lang.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\lex.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\library.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\num.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\opt.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\parse.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\program.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\rand.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\read.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\status.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\vector.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\version.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="include\vm.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/gen/bc_help.txt b/gen/bc_help.txt
index 0da9021e..c9b0482d 100644
--- a/gen/bc_help.txt
+++ b/gen/bc_help.txt
@@ -36,7 +36,8 @@
 usage: %s [options] [file...]
 
 bc is a command-line, arbitrary-precision calculator with a Turing-complete
-language. For details, use `man %s`.
+language. For details, use `man %s` or see the online documentation at
+https://git.yzena.com/gavin/bc/src/tag/%s/manuals/bc/%s.1.md.
 
 This bc is compatible with both the GNU bc and the POSIX bc spec. See the GNU bc
 manual (https://www.gnu.org/software/bc/manual/bc.html) and bc spec
@@ -56,7 +57,7 @@ This bc has three differences to the GNU bc:
      scripts to work while somewhat preserving expected behavior (versus C) and
      making parsing easier.
   3) This bc has many more extensions than the GNU bc does. For details, see the
-     man page.
+     man page or online documentation.
 
 This bc also implements the dot (.) extension of the BSD bc.
 
@@ -74,8 +75,8 @@ Options:
   -g  --global-stacks
 
       Turn scale, ibase, and obase into stacks. This makes the value of each be
-      be restored on returning from functions. See the man page for more
-      details.
+      be restored on returning from functions. See the man page or online
+      documentation for more details.
 
   -h  --help
 
@@ -96,8 +97,8 @@ Options:
           e(expr)  =  raises e to the power of expr
           j(n, x)  =  Bessel function of integer order n of x
 
-      This bc may load more functions with these options. See the manpage for
-      details.
+      This bc may load more functions with these options. See the manpage or
+      online documentation for details.
 
   -P  --no-prompt
 
diff --git a/gen/dc_help.txt b/gen/dc_help.txt
index 9fc8ee11..c573b967 100644
--- a/gen/dc_help.txt
+++ b/gen/dc_help.txt
@@ -36,12 +36,13 @@
 usage: %s [options] [file...]
 
 dc is a reverse-polish notation command-line calculator which supports unlimited
-precision arithmetic. For details, use `man %s`.
+precision arithmetic. For details, use `man %s` or see the online documentation
+at https://git.yzena.com/gavin/bc/src/tag/%s/manuals/bc/%s.1.md.
 
-This dc is (mostly) compatible with the FreeBSD dc and the GNU dc. See the
-FreeBSD man page (https://www.unix.com/man-page/FreeBSD/1/dc/) and the GNU dc
-manual (https://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html) for
-details.
+This dc is (mostly) compatible with the OpenBSD dc and the GNU dc. See the
+OpenBSD man page (http://man.openbsd.org/OpenBSD-current/man1/dc.1) and the GNU
+dc manual (https://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html)
+for details.
 
 This dc has a few differences from the two above:
 
diff --git a/gen/strgen.c b/gen/strgen.c
index 2d133ba5..a186eeec 100644
--- a/gen/strgen.c
+++ b/gen/strgen.c
@@ -40,7 +40,9 @@
 
 #include <errno.h>
 
+#ifndef _WIN32
 #include <libgen.h>
+#endif // _WIN32
 
 static const char* const bc_gen_header =
 	"// Copyright (c) 2018-2021 Gavin D. Howard and contributors.\n"
@@ -60,6 +62,54 @@ static const char* const bc_gen_name_extern = "extern const char %s[];\n\n";
 
 #define MAX_WIDTH (74)
 
+void open_file(FILE** f, const char* filename, const char* mode) {
+
+#ifndef _WIN32
+	*f = fopen(filename, mode);
+#else // _WIN32
+	*f = NULL;
+	fopen_s(f, filename, mode);
+#endif // _WIN32
+}
+
+int output_label(FILE* out, const char* label, const char* name) {
+
+#ifndef _WIN32
+	return fprintf(out, bc_gen_label, label, name);
+#else // _WIN32
+
+	size_t i, count = 0, len = strlen(name);
+	char* buf;
+	int ret;
+
+	for (i = 0; i < len; ++i) {
+		count += (name[i] == '\\');
+	}
+
+	buf = (char*) malloc(len + 1 + count);
+	if (buf == NULL) return -1;
+
+	count = 0;
+
+	for (i = 0; i < len; ++i) {
+		buf[i + count] = name[i];
+		if (name[i] == '\\') {
+			count += 1;
+			buf[i + count] = name[i];
+		}
+	}
+
+	buf[i + count] = '\0';
+
+	ret = fprintf(out, bc_gen_label, label, buf);
+
+	free(buf);
+
+	return ret;
+
+#endif // _WIN32
+}
+
 int main(int argc, char *argv[]) {
 
 	FILE *in, *out;
@@ -82,17 +132,17 @@ int main(int argc, char *argv[]) {
 
 	remove_tabs = (argc > 6);
 
-	in = fopen(argv[1], "r");
+	open_file(&in, argv[1], "r");
 	if (!in) return INVALID_INPUT_FILE;
 
-	out = fopen(argv[2], "w");
+	open_file(&out, argv[2], "w");
 	if (!out) goto out_err;
 
 	if (fprintf(out, bc_gen_header, argv[1]) < 0) goto err;
 	if (has_label && fprintf(out, bc_gen_label_extern, label) < 0) goto err;
 	if (fprintf(out, bc_gen_name_extern, name) < 0) goto err;
 	if (has_define && fprintf(out, bc_gen_ifdef, define) < 0) goto err;
-	if (has_label && fprintf(out, bc_gen_label, label, argv[1]) < 0) goto err;
+	if (has_label && output_label(out, label, argv[1]) < 0) goto err;
 	if (fprintf(out, bc_gen_name, name) < 0) goto err;
 
 	c = count = slashes = 0;
diff --git a/include/bcl.h b/include/bcl.h
index 3c67beb2..3efb028b 100644
--- a/include/bcl.h
+++ b/include/bcl.h
@@ -36,6 +36,13 @@
 #ifndef BC_BCL_H
 #define BC_BCL_H
 
+#ifdef _WIN32
+#include <Windows.h>
+#include <BaseTsd.h>
+#include <stdio.h>
+#include <io.h>
+#endif // _WIN32
+
 #include <stdbool.h>
 #include <stdlib.h>
 #include <limits.h>
@@ -74,6 +81,99 @@ typedef uint32_t BclRandInt;
 #error BC_LONG_BIT must be at least 32
 
 #endif // BC_LONG_BIT >= 64
+#define BC_UNUSED(e) ((void) (e))
+
+#ifndef BC_LIKELY
+#define BC_LIKELY(e) (e)
+#endif // BC_LIKELY
+
+#ifndef BC_UNLIKELY
+#define BC_UNLIKELY(e) (e)
+#endif // BC_UNLIKELY
+
+#define BC_ERR(e) BC_UNLIKELY(e)
+#define BC_NO_ERR(s) BC_LIKELY(s)
+
+#ifndef BC_DEBUG_CODE
+#define BC_DEBUG_CODE (0)
+#endif // BC_DEBUG_CODE
+
+#if __STDC_VERSION__ >= 201100L
+#include <stdnoreturn.h>
+#define BC_NORETURN _Noreturn
+#else // __STDC_VERSION__
+#define BC_NORETURN
+#define BC_MUST_RETURN
+#endif // __STDC_VERSION__
+
+#if defined(__clang__) || defined(__GNUC__)
+#if defined(__has_attribute)
+#if __has_attribute(fallthrough)
+#define BC_FALLTHROUGH __attribute__((fallthrough));
+#else // __has_attribute(fallthrough)
+#define BC_FALLTHROUGH
+#endif // __has_attribute(fallthrough)
+#else // defined(__has_attribute)
+#define BC_FALLTHROUGH
+#endif // defined(__has_attribute)
+#else // defined(__clang__) || defined(__GNUC__)
+#define BC_FALLTHROUGH
+#endif // defined(__clang__) || defined(__GNUC__)
+
+// Workarounds for AIX's POSIX incompatibility.
+#ifndef SIZE_MAX
+#define SIZE_MAX __SIZE_MAX__
+#endif // SIZE_MAX
+#ifndef UINTMAX_C
+#define UINTMAX_C __UINTMAX_C
+#endif // UINTMAX_C
+#ifndef UINT32_C
+#define UINT32_C __UINT32_C
+#endif // UINT32_C
+#ifndef UINT_FAST32_MAX
+#define UINT_FAST32_MAX __UINT_FAST32_MAX__
+#endif // UINT_FAST32_MAX
+#ifndef UINT16_MAX
+#define UINT16_MAX __UINT16_MAX__
+#endif // UINT16_MAX
+#ifndef SIG_ATOMIC_MAX
+#define SIG_ATOMIC_MAX __SIG_ATOMIC_MAX__
+#endif // SIG_ATOMIC_MAX
+
+// Windows has deprecated isatty() and the rest of these.
+// Or doesn't have them.
+#ifdef _WIN32
+
+// This one is special. Windows did not like me defining an
+// inline function that was not given a definition in a header
+// file. This suppresses that by making inline functions non-inline.
+#define inline
+
+#define restrict __restrict
+#define strdup _strdup
+#define write(f, b, s) _write((f), (b), (unsigned int) (s))
+#define read(f, b, s) _read((f), (b), (unsigned int) (s))
+#define close _close
+#define open(f, n, m) _sopen_s(f, n, m, _SH_DENYNO, _S_IREAD | _S_IWRITE)
+#define sigjmp_buf jmp_buf
+#define sigsetjmp(j, s) setjmp(j)
+#define siglongjmp longjmp
+#define isatty _isatty
+#define STDIN_FILENO (0)
+#define STDOUT_FILENO (1)
+#define STDERR_FILENO (2)
+#define ssize_t SSIZE_T
+#define S_ISDIR(m) ((m) & _S_IFDIR)
+#define O_RDONLY _O_RDONLY
+#define stat _stat
+#define fstat _fstat
+#define BC_FILE_SEP '\\'
+
+#else // _WIN32
+#define BC_FILE_SEP '/'
+#endif // _WIN32
+
+#if BC_ENABLE_LIBRARY
 
 typedef enum BclError {
 
@@ -181,4 +281,6 @@ BclNumber bcl_rand_seed2num(void);
 BclRandInt bcl_rand_int(void);
 BclRandInt bcl_rand_bounded(BclRandInt bound);
 
+#endif // BC_ENABLE_LIBRARY
+
 #endif // BC_BCL_H
diff --git a/include/num.h b/include/num.h
index 2104f8b8..8beea001 100644
--- a/include/num.h
+++ b/include/num.h
@@ -172,9 +172,10 @@ struct BcRNG;
 #endif // BC_DEBUG_CODE
 
 typedef void (*BcNumBinaryOp)(BcNum*, BcNum*, BcNum*, size_t);
+typedef void (*BcNumBinOp)(BcNum*, BcNum*, BcNum* restrict, size_t);
 typedef size_t (*BcNumBinaryOpReq)(const BcNum*, const BcNum*, size_t);
 typedef void (*BcNumDigitOp)(size_t, size_t, bool);
-typedef void (*BcNumShiftAddOp)(BcDig*, const BcDig*, size_t);
+typedef void (*BcNumShiftAddOp)(BcDig* restrict, const BcDig* restrict, size_t);
 
 void bc_num_init(BcNum *restrict n, size_t req);
 void bc_num_setup(BcNum *restrict n, BcDig *restrict num, size_t cap);
diff --git a/include/status.h b/include/status.h
index cf41a3ce..be235649 100644
--- a/include/status.h
+++ b/include/status.h
@@ -150,63 +150,4 @@ typedef enum BcErr {
 #define BC_ERR_IDX_WARN (BC_ERR_IDX_NELEMS)
 #endif // BC_ENABLED
 
-#define BC_UNUSED(e) ((void) (e))
-
-#ifndef BC_LIKELY
-#define BC_LIKELY(e) (e)
-#endif // BC_LIKELY
-
-#ifndef BC_UNLIKELY
-#define BC_UNLIKELY(e) (e)
-#endif // BC_UNLIKELY
-
-#define BC_ERR(e) BC_UNLIKELY(e)
-#define BC_NO_ERR(s) BC_LIKELY(s)
-
-#ifndef BC_DEBUG_CODE
-#define BC_DEBUG_CODE (0)
-#endif // BC_DEBUG_CODE
-
-#if __STDC_VERSION__ >= 201100L
-#include <stdnoreturn.h>
-#define BC_NORETURN _Noreturn
-#else // __STDC_VERSION__
-#define BC_NORETURN
-#define BC_MUST_RETURN
-#endif // __STDC_VERSION__
-
-#if defined(__clang__) || defined(__GNUC__)
-#if defined(__has_attribute)
-#if __has_attribute(fallthrough)
-#define BC_FALLTHROUGH __attribute__((fallthrough));
-#else // __has_attribute(fallthrough)
-#define BC_FALLTHROUGH
-#endif // __has_attribute(fallthrough)
-#else // defined(__has_attribute)
-#define BC_FALLTHROUGH
-#endif // defined(__has_attribute)
-#else // defined(__clang__) || defined(__GNUC__)
-#define BC_FALLTHROUGH
-#endif // defined(__clang__) || defined(__GNUC__)
-
-// Workarounds for AIX's POSIX incompatibility.
-#ifndef SIZE_MAX
-#define SIZE_MAX __SIZE_MAX__
-#endif // SIZE_MAX
-#ifndef UINTMAX_C
-#define UINTMAX_C __UINTMAX_C
-#endif // UINTMAX_C
-#ifndef UINT32_C
-#define UINT32_C __UINT32_C
-#endif // UINT32_C
-#ifndef UINT_FAST32_MAX
-#define UINT_FAST32_MAX __UINT_FAST32_MAX__
-#endif // UINT_FAST32_MAX
-#ifndef UINT16_MAX
-#define UINT16_MAX __UINT16_MAX__
-#endif // UINT16_MAX
-#ifndef SIG_ATOMIC_MAX
-#define SIG_ATOMIC_MAX __SIG_ATOMIC_MAX__
-#endif // SIG_ATOMIC_MAX
-
 #endif // BC_STATUS_H
diff --git a/include/version.h b/include/version.h
index cb35c781..c1bcb135 100644
--- a/include/version.h
+++ b/include/version.h
@@ -38,4 +38,4 @@
 
 #define VERSION 3.4.0
 
-#endif // BC_VERSION_H
\ No newline at end of file
+#endif // BC_VERSION_H
diff --git a/include/vm.h b/include/vm.h
index 30938493..8d726ffe 100644
--- a/include/vm.h
+++ b/include/vm.h
@@ -78,22 +78,27 @@
 
 #ifndef MAINEXEC
 #define MAINEXEC bc
-#endif
+#endif // MAINEXEC
 
+#ifndef _WIN32
 #ifndef EXECPREFIX
 #define EXECPREFIX
-#endif
+#endif // EXECPREFIX
+#else // _WIN32
+#undef EXECPREFIX
+#endif // _WIN32
 
 #define GEN_STR(V) #V
 #define GEN_STR2(V) GEN_STR(V)
 
 #define BC_VERSION GEN_STR2(VERSION)
-#define BC_EXECPREFIX GEN_STR2(EXECPREFIX)
 #define BC_MAINEXEC GEN_STR2(MAINEXEC)
+#define BC_BUILD_TYPE GEN_STR2(BUILD_TYPE)
 
-// Windows has deprecated isatty().
-#ifdef _WIN32
-#define isatty _isatty
+#ifndef _WIN32
+#define BC_EXECPREFIX GEN_STR2(EXECPREFIX)
+#else // _WIN32
+#define BC_EXECPREFIX ""
 #endif // _WIN32
 
 #if !BC_ENABLE_LIBRARY
@@ -435,6 +440,8 @@ size_t bc_vm_growSize(size_t a, size_t b);
 void* bc_vm_malloc(size_t n);
 void* bc_vm_realloc(void *ptr, size_t n);
 char* bc_vm_strdup(const char *str);
+char* bc_vm_getenv(const char* var);
+void bc_vm_getenvFree(char* var);
 
 #if BC_DEBUG_CODE
 void bc_vm_jmp(const char *f);
diff --git a/src/args.c b/src/args.c
index 1db960fe..c764ca83 100644
--- a/src/args.c
+++ b/src/args.c
@@ -39,7 +39,9 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifndef _WIN32
 #include <unistd.h>
+#endif // _WIN32
 
 #include <vector.h>
 #include <read.h>
diff --git a/src/file.c b/src/file.c
index c58b026f..fb904423 100644
--- a/src/file.c
+++ b/src/file.c
@@ -36,7 +36,10 @@
 #include <assert.h>
 #include <errno.h>
 #include <string.h>
+
+#ifndef _WIN32
 #include <unistd.h>
+#endif // _WIN32
 
 #include <file.h>
 #include <vm.h>
diff --git a/src/main.c b/src/main.c
index 17adc952..afe2fd8b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -38,7 +38,10 @@
 #include <string.h>
 
 #include <locale.h>
+
+#ifndef _WIN32
 #include <libgen.h>
+#endif // _WIN32
 
 #include <setjmp.h>
 
@@ -55,7 +58,7 @@ int main(int argc, char *argv[]) {
 
 	vm.locale = setlocale(LC_ALL, "");
 
-	name = strrchr(argv[0], '/');
+	name = strrchr(argv[0], BC_FILE_SEP);
 	vm.name = (name == NULL) ? argv[0] : name + 1;
 
 	if (strlen(vm.name) > len) vm.name += len;
diff --git a/src/num.c b/src/num.c
index 2bf93c15..5b84c2b8 100644
--- a/src/num.c
+++ b/src/num.c
@@ -1389,7 +1389,7 @@ static void bc_num_right(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale) {
 #endif // BC_ENABLE_EXTRA_MATH
 
 static void bc_num_binary(BcNum *a, BcNum *b, BcNum *c, size_t scale,
-                          BcNumBinaryOp op, size_t req)
+                          BcNumBinOp op, size_t req)
 {
 	BcNum *ptr_a, *ptr_b, num2;
 	bool init = false;
diff --git a/src/program.c b/src/program.c
index 81d0746e..82735083 100644
--- a/src/program.c
+++ b/src/program.c
@@ -1468,7 +1468,7 @@ static void bc_program_nquit(BcProgram *p, uchar inst) {
 	for (i = 0; val && i < p->tail_calls.len; ++i) {
 		size_t calls = *((size_t*) bc_vec_item_rev(&p->tail_calls, i)) + 1;
 		if (calls >= val) val = 0;
-		else val -= calls;
+		else val -= (BcBigDig) calls;
 	}
 
 	if (i == p->stack.len) {
diff --git a/src/rand.c b/src/rand.c
index 6b2ec7bd..886f7a6b 100644
--- a/src/rand.c
+++ b/src/rand.c
@@ -44,7 +44,13 @@
 #include <string.h>
 #include <time.h>
 #include <fcntl.h>
+
+#ifndef _WIN32
 #include <unistd.h>
+#else // _WIN32
+#include <Windows.h>
+#include <bcrypt.h>
+#endif // _WIN32
 
 #include <status.h>
 #include <rand.h>
@@ -140,7 +146,8 @@ static void bc_rand_copy(BcRNGData *d, BcRNGData *s) {
 	else if (!BC_RAND_NOTMODIFIED(s)) bc_rand_clearModified(d);
 }
 
-static ulong bc_rand_frand(void *ptr) {
+#ifndef _WIN32
+static ulong bc_rand_frand(void* ptr) {
 
 	ulong buf[1];
 	int fd;
@@ -148,14 +155,31 @@ static ulong bc_rand_frand(void *ptr) {
 
 	assert(ptr != NULL);
 
-	fd = *((int*) ptr);
+	fd = *((int*)ptr);
 
 	nread = read(fd, buf, sizeof(ulong));
 
 	if (BC_ERR(nread != sizeof(ulong))) bc_vm_fatalError(BC_ERR_FATAL_IO_ERR);
 
-	return *((ulong*) buf);
+	return *((ulong*)buf);
 }
+#else // _WIN32
+static ulong bc_rand_winrand(void* ptr) {
+
+	ulong buf[1];
+	NTSTATUS s;
+
+	BC_UNUSED(ptr);
+
+	buf[0] = 0;
+
+	s = BCryptGenRandom(NULL, (char*) buf, sizeof(ulong), BCRYPT_USE_SYSTEM_PREFERRED_RNG);
+
+	if (BC_ERR(!BCRYPT_SUCCESS(s))) buf[0] = 0;
+
+	return buf[0];
+}
+#endif // _WIN32
 
 static ulong bc_rand_rand(void *ptr) {
 
@@ -252,10 +276,11 @@ static void bc_rand_seedZeroes(BcRNG *r, BcRNGData *rng, size_t idx) {
 
 void bc_rand_srand(BcRNGData *rng) {
 
-	int fd;
+	int fd = 0;
 
 	BC_SIG_LOCK;
 
+#ifndef _WIN32
 	fd = open("/dev/urandom", O_RDONLY);
 
 	if (BC_NO_ERR(fd >= 0)) {
@@ -271,6 +296,9 @@ void bc_rand_srand(BcRNGData *rng) {
 			close(fd);
 		}
 	}
+#else // _WIN32
+	bc_rand_fill(rng, bc_rand_winrand, NULL);
+#endif // _WIN32
 
 	while (BC_ERR(BC_RAND_ZERO(rng))) bc_rand_fill(rng, bc_rand_rand, NULL);
 
diff --git a/src/read.c b/src/read.c
index b0c5d9f8..43e65b65 100644
--- a/src/read.c
+++ b/src/read.c
@@ -43,13 +43,30 @@
 
 #include <fcntl.h>
 #include <sys/stat.h>
+
+#ifndef _WIN32
 #include <unistd.h>
+#endif // _WIN32
 
 #include <read.h>
 #include <history.h>
 #include <program.h>
 #include <vm.h>
 
+static int bc_read_open(const char* path, int mode) {
+
+	int fd;
+
+#ifndef _WIN32
+	fd = open(path, mode);
+#else // _WIN32
+	fd = -1;
+	open(&fd, path, mode);
+#endif
+
+	return fd;
+}
+
 static bool bc_read_binary(const char *buf, size_t size) {
 
 	size_t i;
@@ -194,7 +211,8 @@ void bc_read_file(const char *path, char **buf) {
 
 	assert(path != NULL);
 
-	fd = open(path, O_RDONLY);
+	fd = bc_read_open(path, O_RDONLY);
+
 	if (BC_ERR(fd < 0)) bc_vm_verr(BC_ERR_FATAL_FILE_ERR, path);
 	if (BC_ERR(fstat(fd, &pstat) == -1)) goto malloc_err;
 
diff --git a/src/vm.c b/src/vm.c
index 0d2a0bf2..7f0f30b1 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -56,6 +56,7 @@
 
 #endif // _WIN32
 
+#include <status.h>
 #include <vector.h>
 #include <args.h>
 #include <vm.h>
@@ -119,6 +120,31 @@ static void bc_vm_sig(int sig) {
 	if (!vm.sig_lock) BC_VM_JMP;
 }
 
+static void bc_vm_sigaction(void) {
+#ifndef _WIN32
+
+	struct sigaction sa;
+
+	sigemptyset(&sa.sa_mask);
+	sa.sa_handler = bc_vm_sig;
+	sa.sa_flags = SA_NODEFER;
+
+	sigaction(SIGTERM, &sa, NULL);
+	sigaction(SIGQUIT, &sa, NULL);
+	sigaction(SIGINT, &sa, NULL);
+
+#if BC_ENABLE_HISTORY
+	if (BC_TTY) sigaction(SIGHUP, &sa, NULL);
+#endif // BC_ENABLE_HISTORY
+
+#else // _WIN32
+
+	signal(SIGTERM, bc_vm_sig);
+	signal(SIGINT, bc_vm_sig);
+
+#endif // _WIN32
+}
+
 void bc_vm_info(const char* const help) {
 
 	BC_SIG_ASSERT_LOCKED;
@@ -131,7 +157,8 @@ void bc_vm_info(const char* const help) {
 
 	if (help) {
 		bc_file_putchar(&vm.fout, bc_flush_none, '\n');
-		bc_file_printf(&vm.fout, help, vm.name, vm.name);
+		bc_file_printf(&vm.fout, help, vm.name, vm.name,
+		               BC_VERSION, BC_BUILD_TYPE);
 	}
 
 	bc_file_flush(&vm.fout, bc_flush_err);
@@ -260,14 +287,19 @@ void bc_vm_handleError(BcErr e, size_t line, ...) {
 
 static void bc_vm_envArgs(const char* const env_args_name) {
 
-	char *env_args = getenv(env_args_name), *buf, *start;
+	char *env_args = bc_vm_getenv(env_args_name), *buf, *start;
 	char instr = '\0';
 
 	BC_SIG_ASSERT_LOCKED;
 
 	if (env_args == NULL) return;
 
+	// Windows already allocates, so we don't need to.
+#ifndef _WIN32
 	start = buf = vm.env_args_buffer = bc_vm_strdup(env_args);
+#else // _WIN32
+	start = buf = vm.env_args_buffer = env_args;
+#endif // _WIN32
 
 	assert(buf != NULL);
 
@@ -320,7 +352,7 @@ static void bc_vm_envArgs(const char* const env_args_name) {
 
 static size_t bc_vm_envLen(const char *var) {
 
-	char *lenv = getenv(var);
+	char *lenv = bc_vm_getenv(var);
 	size_t i, len = BC_NUM_PRINT_WIDTH;
 	int num;
 
@@ -336,6 +368,8 @@ static size_t bc_vm_envLen(const char *var) {
 	}
 	else len = BC_NUM_PRINT_WIDTH;
 
+	bc_vm_getenvFree(lenv);
+
 	return len;
 }
 #endif // BC_ENABLE_LIBRARY
@@ -464,6 +498,26 @@ void bc_vm_putchar(int c, BcFlushType type) {
 #endif // BC_ENABLE_LIBRARY
 }
 
+char* bc_vm_getenv(const char* var) {
+
+	char* ret;
+
+#ifndef _WIN32
+	ret = getenv(var);
+#else // _WIN32
+	_dupenv_s(&ret, NULL, var);
+#endif // _WIN32
+
+	return ret;
+}
+
+void bc_vm_getenvFree(char* var) {
+	BC_UNUSED(var);
+#ifdef _WIN32
+	free(var);
+#endif // _WIN32
+}
+
 #if !BC_ENABLE_LIBRARY
 static void bc_vm_clean(void) {
 
@@ -853,7 +907,6 @@ void bc_vm_boot(int argc, char *argv[], const char *env_len,
                 const char* const env_args)
 {
 	int ttyin, ttyout, ttyerr;
-	struct sigaction sa;
 
 	BC_SIG_ASSERT_LOCKED;
 
@@ -865,17 +918,7 @@ void bc_vm_boot(int argc, char *argv[], const char *env_len,
 	vm.flags |= (ttyin != 0 && ttyout != 0 && ttyerr != 0) ? BC_FLAG_TTY : 0;
 	vm.flags |= ttyin && ttyout ? BC_FLAG_I : 0;
 
-	sigemptyset(&sa.sa_mask);
-	sa.sa_handler = bc_vm_sig;
-	sa.sa_flags = SA_NODEFER;
-
-	sigaction(SIGTERM, &sa, NULL);
-	sigaction(SIGQUIT, &sa, NULL);
-	sigaction(SIGINT, &sa, NULL);
-
-#if BC_ENABLE_HISTORY
-	if (BC_TTY) sigaction(SIGHUP, &sa, NULL);
-#endif // BC_ENABLE_HISTORY
+	bc_vm_sigaction();
 
 	bc_vm_init();
 
@@ -901,7 +944,11 @@ void bc_vm_boot(int argc, char *argv[], const char *env_len,
 #endif // BC_ENABLE_HISTORY
 
 #if BC_ENABLED
-	if (BC_IS_BC) vm.flags |= BC_FLAG_S * (getenv("POSIXLY_CORRECT") != NULL);
+	if (BC_IS_BC) {
+		char* var = bc_vm_getenv("POSIXLY_CORRECT");
+		vm.flags |= BC_FLAG_S * (var != NULL);
+		bc_vm_getenvFree(var);
+	}
 #endif // BC_ENABLED
 
 	bc_vm_envArgs(env_args);