Create module 'builtins', move 'runtime' -> 'runtime.jvm'

'builtins' will be used for platform-independent core built-in definitions,
'runtime.jvm' for things that should be present at runtime in order for Kotlin
code to execute correctly on JVM

ProgressionUtil goes to 'builtins' right now because progression iterators
depend on it, but should be rewritten to Kotlin later

generators/src/org/jetbrains/jet/generators/runtime/common.kt

@@ -50,20 +50,32 @@ fun floatToIntBits(v: String) = "java.lang.Float.floatToIntBits($v)"
 fun doubleToLongBits(v: String) = "java.lang.Double.doubleToLongBits($v)"
 
 
-val OUTPUT_DIR: File by Delegates.lazy {
-    val result = File("runtime/kt/")
+
+fun existingDirectory(path: String): File {
+    val result = File(path)
     if (!result.exists()) {
         throw IllegalStateException("Output dir does not exist: ${result.getAbsolutePath()}")
     }
-    result
+    return result
 }
 
-fun generateRuntimeFile(name: String, generate: (PrintWriter) -> Unit) {
-    val file = File(OUTPUT_DIR, name)
+val BUILT_INS_DIR: File by Delegates.lazy { existingDirectory("core/builtins/src/jet/") }
+val RUNTIME_JVM_DIR: File by Delegates.lazy { existingDirectory("core/runtime.jvm/src/jet/") }
+
+fun generateFile(dir: File, name: String, generate: (PrintWriter) -> Unit) {
+    val file = File(dir, name)
     println("generating $file")
     PrintWriter(file) use generate
 }
 
+fun generateBuiltInFile(name: String, generate: (PrintWriter) -> Unit) {
+    generateFile(BUILT_INS_DIR, name, generate)
+}
+
+fun generateRuntimeJvmFile(name: String, generate: (PrintWriter) -> Unit) {
+    generateFile(BUILT_INS_DIR, name, generate)
+}
+
 fun generatedBy(out: PrintWriter, generator: String) {
     out.println("// Generated by $generator")
     out.println()

generators/src/org/jetbrains/jet/generators/runtime/functions.kt

@@ -122,11 +122,11 @@ class GenerateFunctions(val out: PrintWriter, val kind: FunctionKind) {
 
 fun main(args: Array<String>) {
     for (kind in FunctionKind.values()) {
-        generateRuntimeFile(kind.getFileName()) {
+        generateBuiltInFile(kind.getFileName()) {
             GenerateFunctions(it, kind).generateFunctionClasses()
         }
 
-        generateRuntimeFile(kind.getImplFileName()) {
+        generateRuntimeJvmFile(kind.getImplFileName()) {
             GenerateFunctions(it, kind).generateFunctionImplClasses()
         }
     }

generators/src/org/jetbrains/jet/generators/runtime/iterators.kt

@@ -48,7 +48,7 @@ class GenerateIterators(val out: PrintWriter) {
 }
 
 fun main(args: Array<String>) {
-    generateRuntimeFile("Iterators.kt") {
+    generateBuiltInFile("Iterators.kt") {
         GenerateIterators(it).generate()
     }
 }

generators/src/org/jetbrains/jet/generators/runtime/progressions.kt

@@ -84,7 +84,7 @@ class GenerateProgressions(val out: PrintWriter) {
 }
 
 fun main(args: Array<String>) {
-    generateRuntimeFile("Progressions.kt") {
+    generateBuiltInFile("Progressions.kt") {
         GenerateProgressions(it).generate()
     }
 }

generators/src/org/jetbrains/jet/generators/runtime/ranges.kt

@@ -81,7 +81,7 @@ class GenerateRanges(val out: PrintWriter) {
 }
 
 fun main(args: Array<String>) {
-    generateRuntimeFile("Ranges.kt") {
+    generateBuiltInFile("Ranges.kt") {
         GenerateRanges(it).generate()
     }
 }