Add initial RISC OS support

!DosBox-X/!Boot,feb

@@ -0,0 +1,2 @@
+Set DosBox-X$Dir <Obey$Dir>
+IconSprites <DosBox-X$Dir>.!Sprites

!DosBox-X/!Run,feb

@@ -0,0 +1,9 @@
+Set DosBox-X$Dir <Obey$Dir>
+
+RMEnsure SharedUnixLibrary 1.14 RMLoad System:Modules.SharedULib
+RMEnsure SharedUnixLibrary 1.14 Error DOSBox-X requires SharedUnixLibrary 1.14 or later. This can be downloaded from https://www.riscos.info/packages/LibraryDetails.html#SharedUnixLibrary
+
+RMEnsure DigitalRenderer 0.56 RMLoad System:Modules.DRenderer
+RMEnsure DigitalRenderer 0.56 Error DOSBox-X requires DigitalRenderer 0.56 or later. This can be downloaded from https://www.riscos.info/packages/LibraryDetails.html#DRenderer
+
+Run <DosBox-X$Dir>.dosbox-x 2><Obey$Dir>.stderr

.gitignore

@@ -325,6 +325,10 @@ windows-installer/DOSBox-X-standalone-*
 windows-installer/DOSBox-X-setup-*.exe
 windows-installer/DOSBox-X-setup-*.zip
 
+\!DosBox-X/*,ff8
+\!DosBox-X/CHANGELOG,fff
+\!DosBox-X/resources/*
+
 *.o
 *.a
 *.la

build-riscos

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# I'm sick and tired of all the churn the three versions of autoconf
+# are causing in this repo. Stop committing the configure scripts
+# and just autoregen.
+./autogen.sh || exit 1
+
+echo Compiling DOSBox-X
+chmod +x configure
+
+# for sdl-config
+export PATH=$GCCSDK_INSTALL_ENV/bin:$PATH
+export CPPFLAGS=-I$GCCSDK_INSTALL_ENV/include
+export LDFLAGS="-L$GCCSDK_INSTALL_ENV/lib -static"
+
+./configure --host=arm-unknown-riscos --enable-core-inline "$@"
+make -j3 || exit 1
+elf2aif src/dosbox-x !DosBox-X/dosbox-x,ff8
+cp font/FREECG98.BMP !DosBox-X/resources/freecg98.bmp,69c
+dos2unix -n CHANGELOG !DosBox-X/CHANGELOG,fff

configure.ac

@@ -405,6 +405,11 @@ case "$host" in
        dnl FEATURE: Whether to support direct serial port passthrough
        AC_DEFINE(C_DIRECTSERIAL, 1, [ Define to 1 if you want serial passthrough support (Win32, Posix and OS/2).])
        ;;
+    *-*-riscos*)
+       AC_DEFINE(RISCOS, 1, [Compiling on RISC OS])
+       dnl The following line is required in order to use std::to_string()
+       CXXFLAGS="$CXXFLAGS -D_GLIBCXX_USE_C99=1"
+       ;;
 esac
 fi
 

include/byteorder.h

@@ -5,7 +5,7 @@
 #  include <endian.h>
 
 /* MinGW implements some MSVC idioms, so always test for MinGW first. */
-# elif defined(__MINGW32__)
+# elif defined(__MINGW32__) || defined(__riscos__)
 
 # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 

src/dos/dos_programs.cpp

@@ -55,6 +55,11 @@ bool Mouse_Vertical = false;
 #include "os2.h"
 #endif
 
+#if defined(RISCOS)
+#include <unixlib/local.h>
+#include <limits.h>
+#endif
+
 #if C_DEBUG
 Bitu DEBUG_EnableDebugger(void);
 #endif
@@ -339,6 +344,17 @@ public:
 
             (void)failed;// MAY BE UNUSED
 
+#if defined (RISCOS)
+            // If the user provided a RISC OS style path, convert it to a Unix style path
+            // TODO: Disable UnixLib's automatic path conversion and use RISC OS style paths internally?
+            if (temp_line.find('$',0) != std::string::npos) {
+                char fname[PATH_MAX];
+                is_physfs = false;
+                __unixify_std(temp_line.c_str(), fname, sizeof(fname), 0);
+		temp_line = fname;
+            }
+#endif
+
 #if defined (WIN32) || defined(OS2)
             /* nothing */
 #else

src/gui/sdl_mapper.cpp

@@ -4059,7 +4059,7 @@ void MAPPER_StartUp() {
         /* Note: table has to be tested/updated for various OSs */
 #if defined (MACOSX)
         /* nothing */
-#elif defined(HAIKU)
+#elif defined(HAIKU) || defined(RISCOS)
 		usescancodes = false;
 #elif defined(OS2)
         sdlkey_map[0x61]=SDLK_UP;

src/misc/cross.cpp

@@ -66,6 +66,8 @@ static void W32_ConfDir(std::string& in,bool create) {
 void Cross::GetPlatformResDir(std::string& in) {
 #if defined(MACOSX)
 	in = MacOSXResPath;
+#elif defined(RISCOS)
+	in = "/<DosBox-X$Dir>/resources";
 #elif defined(RESDIR)
 	in = RESDIR;
 #endif
@@ -83,6 +85,8 @@ void Cross::GetPlatformConfigDir(std::string& in) {
 #elif defined(HAIKU)
 	in = "~/config/settings/dosbox";
 	ResolveHomedir(in);
+#elif defined(RISCOS)
+	in = "/<Choices$Write>/DosBox-X";
 #elif !defined(HX_DOS)
 	in = "~/.dosbox";
 	ResolveHomedir(in);
@@ -114,6 +118,9 @@ void Cross::CreatePlatformConfigDir(std::string& in) {
 	in = "~/config/settings/dosbox";
 	ResolveHomedir(in);
 	mkdir(in.c_str(),0700);
+#elif defined(RISCOS)
+	in = "/<Choices$Write>/DosBox-X";
+	mkdir(in.c_str(),0700);
 #elif !defined(HX_DOS)
 	in = "~/.dosbox";
 	ResolveHomedir(in);