1 files changed, 95 insertions, 0 deletions
diff --git a/tools/render-test/options.cpp b/tools/render-test/options.cpp
new file mode 100644
index 000000000..9cfbb81fb
--- /dev/null
+++ b/tools/render-test/options.cpp
@@ -0,0 +1,95 @@
+// options.cpp
+
+#include "options.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+namespace renderer_test {
+
+Options gOptions;
+
+void parseOptions(int* argc, char** argv)
+{
+    int argCount = *argc;
+    char const* const* argCursor = argv;
+    char const* const* argEnd = argCursor + argCount;
+
+    char const** writeCursor = (char const**) argv;
+
+    // first argument is the application name
+    if( argCursor != argEnd )
+    {
+        gOptions.appName = *argCursor++;
+    }
+
+    // now iterate over arguments to collect options
+    while(argCursor != argEnd)
+    {
+        char const* arg = *argCursor++;
+        if( arg[0] != '-' )
+        {
+            *writeCursor++ = arg;
+            continue;
+        }
+
+        if( strcmp(arg, "--") == 0 )
+        {
+            while(argCursor != argEnd)
+            {
+                char const* arg = *argCursor++;
+                *writeCursor++ = arg;
+            }
+            break;
+        }
+        else if( strcmp(arg, "-o") == 0 )
+        {
+            if( argCursor == argEnd )
+            {
+                fprintf(stderr, "expected argument for '%s' option\n", arg);
+                exit(1);
+            }
+            gOptions.outputPath = *argCursor++;
+        }
+        else if( strcmp(arg, "-hlsl") == 0 )
+        {
+            gOptions.mode = Mode::HLSL;
+        }
+        else if( strcmp(arg, "-slang") == 0 )
+        {
+            gOptions.mode = Mode::Slang;
+        }
+        else if( strcmp(arg, "-glsl-cross") == 0 )
+        {
+            gOptions.mode = Mode::GLSLCrossCompile;
+        }
+        else
+        {
+            fprintf(stderr, "unknown option '%s'\n", arg);
+            exit(1);
+        }
+    }
+    
+    // any arguments left over were positional arguments
+    argCount = (int)(writeCursor - argv);
+    argCursor = argv;
+    argEnd = argCursor + argCount;
+
+    // first positional argument is source shader path
+    if( argCursor != argEnd )
+    {
+        gOptions.sourcePath = *argCursor++;
+    }
+
+    // any remaining arguments represent an error
+    if(argCursor != argEnd)
+    {
+        fprintf(stderr, "unexpected arguments\n");
+        exit(1);
+    }
+
+    *argc = 0;
+}
+
+} // renderer_test