juancarlospaco
commented
10 months ago !nim c
import std/[random, macros, fenv]
macro fuzzing*(tipe: typedesc): untyped =
doAssert tipe.kind == nnkSym and tipe.symKind == nskType, "Argument must be a static typedesc of primitive type."
var r = initRand(tipe.strVal.len xor lineInfoObj(tipe).column)
case tipe.strVal
of "int" : result = newLit(int(r.rand(int.high)))
of "int32" : result = newLit(int32(r.rand(int32.high.int)))
of "int16" : result = newLit(int16(r.rand(int16.high.int)))
of "int8" : result = newLit(int8(r.rand(int8.high.int)))
of "uint16" : result = newLit(uint16(r.rand(uint16.high.int)))
of "uint8" : result = newLit(uint8(r.rand(uint8.high.int)))
of "char" : result = newLit(char(r.rand(char.high.int)))
of "byte" : result = newLit(byte(r.rand(byte.high.int)))
of "Positive": result = newLit(Positive(r.rand(Positive.high.int)))
of "Natural" : result = newLit(Natural(r.rand(Natural.high.int)))
of "bool" : result = newLit(bool(r.rand(1)))
of "float" : result = newLit(float(r.rand(maximumPositiveValue(float))))
of "float64" : result = newLit(float64(r.rand(maximumPositiveValue(float64))))
of "float32" : result = newLit(float32(r.rand(maximumPositiveValue(float32))))
of "int64" : result = newLit(int64(r.rand(int32.high.int))) # Reduced range for JS.
of "uint64": result = newLit(uint64(r.rand(int.high.int)))
of "uint32": result = newLit(uint32(r.rand(int32.high.int)))
of "BackwardsIndex": result = nnkCall.newTree(newIdentNode"BackwardsIndex", newLit(int(r.rand(int.high))))
of "string", "cstring":
var s = ""
for _ in 0 .. r.rand(512): s.add(r.rand('\x00'..'\xFF'))
if tipe.strVal == "string":
result = newStrLitNode(s)
else:
result = nnkCall.newTree(newIdentNode"cstring", newStrLitNode(s))
else: result = nnkCall.newTree(newIdentNode"default", tipe)
when isMainModule:
randomize()
type O = enum A, B
echo O.fuzzing
echo int.fuzzing
echo int64.fuzzing
echo int32.fuzzing
echo int16.fuzzing
echo int8.fuzzing
echo uint64.fuzzing
echo uint32.fuzzing
echo uint16.fuzzing
echo uint8.fuzzing
echo byte.fuzzing
echo char.fuzzing
echo repr(BackwardsIndex.fuzzing)
echo bool.fuzzing
echo float.fuzzing
echo float64.fuzzing
echo float32.fuzzing
echo Positive.fuzzing
echo Natural.fuzzing
echo string.fuzzing
echo cstring.fuzzing
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