VM supports math and a few os procs

compiler/vmops.nim

@@ -0,0 +1,66 @@
+#
+#
+#           The Nim Compiler
+#        (c) Copyright 2014 Andreas Rumpf
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+# Unforunately this cannot be a module yet:
+#import vmdeps, vm
+from math import sqrt, ln, log10, log2, exp, round, arccos, arcsin,
+  arctan, arctan2, cos, cosh, hypot, sinh, sin, tan, tanh, pow, trunc, 
+  floor, ceil, fmod
+
+from os import getEnv, existsEnv, dirExists, fileExists
+
+template mathop(op) {.immediate, dirty.} =
+  registerCallback(c, "stdlib.math." & astToStr(op), `op Wrapper`)
+
+template osop(op) {.immediate, dirty.} =
+  registerCallback(c, "stdlib.os." & astToStr(op), `op Wrapper`)
+
+template wrap1f(op) {.immediate, dirty.} =
+  proc `op Wrapper`(a: VmArgs) {.nimcall.} =
+    setResult(a, op(getFloat(a, 0)))
+  mathop op
+
+template wrap2f(op) {.immediate, dirty.} =
+  proc `op Wrapper`(a: VmArgs) {.nimcall.} =
+    setResult(a, op(getFloat(a, 0), getFloat(a, 1)))
+  mathop op
+
+template wrap1s(op) {.immediate, dirty.} =
+  proc `op Wrapper`(a: VmArgs) {.nimcall.} =
+    setResult(a, op(getString(a, 0)))
+  osop op
+
+proc registerAdditionalOps*(c: PCtx) =
+  wrap1f(sqrt)
+  wrap1f(ln)
+  wrap1f(log10)
+  wrap1f(log2)
+  wrap1f(exp)
+  wrap1f(round)
+  wrap1f(arccos)
+  wrap1f(arcsin)
+  wrap1f(arctan)
+  wrap2f(arctan2)
+  wrap1f(cos)
+  wrap1f(cosh)
+  wrap2f(hypot)
+  wrap1f(sinh)
+  wrap1f(sin)
+  wrap1f(tan)
+  wrap1f(tanh)
+  wrap2f(pow)
+  wrap1f(trunc)
+  wrap1f(floor)
+  wrap1f(ceil)
+  wrap2f(fmod)
+
+  wrap1s(getEnv)
+  wrap1s(existsEnv)
+  wrap1s(dirExists)
+  wrap1s(fileExists)