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https://github.com/status-im/nim-json-rpc.git
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Add processing and checking for uintX and intX types and related tests
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coffeepots
zah
parent
3292de2477
commit
e9baad7e87
@ -82,24 +82,20 @@ macro multiRemove(s: string, values: varargs[string]): untyped =
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result = newBlockStmt(body)
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proc jsonGetFunc(paramType: string): (NimNode, JsonNodeKind) =
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# Unknown types get attempted as int
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case paramType
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of "string": result = (ident"getStr", JString)
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of "int": result = (ident"getInt", JInt)
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of "float": result = (ident"getFloat", JFloat)
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of "bool": result = (ident"getBool", JBool)
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of "uint8", "byte": result = (ident"getInt", JInt)
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else: result = (nil, JInt)
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else:
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if paramType == "byte" or paramType[0..3] == "uint" or paramType[0..2] == "int":
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result = (ident"getInt", JInt)
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else:
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result = (nil, JInt)
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#[proc jsonGetFunc(paramType: string): NimNode =
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case paramType
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of "string": result = ident"getStr"
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of "int": result = ident"getInt"
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of "float": result = ident"getFloat"
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of "bool": result = ident"getBool"
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of "uint8": result = ident"getInt"
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else: result = nil
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]#
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proc jsonTranslate(translation: var NimNode, paramType: string): NimNode =
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# TODO: Remove or rework this into `translate`
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case paramType
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of "uint8":
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result = genSym(nskTemplate)
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@ -108,33 +104,18 @@ proc jsonTranslate(translation: var NimNode, paramType: string): NimNode =
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if value > 255 or value < 0:
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raise newException(ValueError, "Value out of range of byte, expected 0-255, got " & $value)
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uint8(value and 0xff)
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of "int8":
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result = genSym(nskTemplate)
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translation = quote do:
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template `result`(value: int): uint8 =
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if value > 255 or value < 0:
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raise newException(ValueError, "Value out of range of byte, expected 0-255, got " & $value)
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uint8(value and 0xff)
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else:
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result = genSym(nskTemplate)
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translation = quote do:
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template `result`(value: untyped): untyped = value
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#[
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proc jsonCheckType(paramType: string): JsonNodeKind =
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case paramType
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of "string": result = JString
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of "int": result = JInt
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of "float": result = JFloat
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of "bool": result = JBool
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of "byte": result = JInt
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]#
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proc preParseTypes(typeNode: var NimNode, typeName: NimNode, errorCheck: var NimNode): bool {.compileTime.} =
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# handle byte
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for i, item in typeNode:
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if item.kind == nnkIdent and item.basename == ident"byte":
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typeNode[i] = ident"int"
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# add some extra checks
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result = true
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else:
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var t = typeNode[i]
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if preParseTypes(t, typeName, errorCheck):
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typeNode[i] = t
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proc expectKind(node, jsonIdent, fieldName: NimNode, tn: JsonNodeKind) =
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let
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expectedStr = "Expected parameter `" & fieldName.repr & "` to be " & $tn & " but got "
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@ -144,38 +125,79 @@ proc expectKind(node, jsonIdent, fieldName: NimNode, tn: JsonNodeKind) =
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raise newException(ValueError, `expectedStr` & $`jsonIdent`.kind)
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)
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proc translate(paramType: string, getField: NimNode): NimNode =
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# Note that specific types add extra run time bounds checking code
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proc getDigit(s: string): (bool, int) =
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if s.len == 0: return (false, 0)
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for c in s:
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if not c.isDigit: return (false, 0)
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return (true, s.parseInt)
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from math import pow
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proc translate(paramTypeStr: string, getField: NimNode): NimNode =
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# Add checking and type conversion for more constrained types
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# Note:
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# * specific types add extra run time bounds checking code
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# * types that map one-one get passed as is
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# * any other types get a simple cast, ie; MyType(value) and
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# get are assumed to be integer.
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# NOTE: However this will never occur because currently jsonFunc
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# is required to return nil to process other types.
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# TODO: Allow distinct types
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var paramType = paramTypeStr
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if paramType == "byte": paramType = "uint8"
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case paramType
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of "byte":
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result = quote do:
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let x = `getField`
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if x > 255 or x < 0:
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raise newException(ValueError, "Value out of range of byte, expected 0-255, got " & $x)
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uint8(x and 0xff)
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else:
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of "string", "int", "bool":
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result = quote do: `getField`
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else:
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if paramType[0 .. 3].toLowerAscii == "uint":
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let (numeric, bitSize) = paramType[4 .. high(paramType)].getDigit
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if numeric:
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assert bitSize mod 8 == 0
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let
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maxSize = 1 shl bitSize - 1
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sizeRangeStr = "0 to " & $maxSize
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uintType = ident("uint" & $bitSize)
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result = quote do:
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let x = `getField`
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if x > `maxSize` or x < 0:
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raise newException(ValueError, "Value out of range of byte, expected " & `sizeRangeStr` & ", got " & $x)
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`uintType`(x)
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elif paramType[0 .. 2].toLowerAscii == "int":
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let (numeric, bitSize) = paramType[3 .. paramType.high].getDigit
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if numeric:
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assert bitSize mod 8 == 0
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let
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maxSize = 1 shl (bitSize - 1)
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minVal = -maxSize
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maxVal = maxSize - 1
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sizeRangeStr = $minVal & " to " & $maxVal
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intType = ident("int" & $bitSize)
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result = quote do:
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let x = `getField`
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if x < `minVal` or x > `maxVal`:
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raise newException(ValueError, "Value out of range of byte, expected " & `sizeRangeStr` & ", got " & $x)
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`intType`(x)
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else:
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let nativeParamType = ident(paramTypeStr)
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result = quote do: `nativeParamType`(`getField`)
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macro processFields(jsonIdent, fieldName, fieldType: typed): untyped =
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result = newStmtList()
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let
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fieldTypeStr = fieldType.repr
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fieldTypeStr = fieldType.repr.toLowerAscii()
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(jFetch, jKind) = jsonGetFunc(fieldTypeStr)
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var translation: NimNode
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if not jFetch.isNil:
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# TODO: getType(fieldType) to translate byte -> uint8 and avoid special cases
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result.expectKind(jsonIdent, fieldName, jKind)
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#let transIdent = translation.jsonTranslate(fieldTypeStr)
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let
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getField = quote do: `jsonIdent`.`jFetch`
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res = translate(`fieldTypeStr`, `getField`)
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result.add(quote do:
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`fieldName` = `res`
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)
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echo ">>", result.repr, "<<"
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#result.add(quote do:
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# `translation`
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# `fieldName` = `transIdent`(`jsonIdent`.`jFetch`)
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#)
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else:
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var fetchedType = getType(fieldType)
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var derivedType: NimNode
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@ -229,20 +251,21 @@ macro processFields(jsonIdent, fieldName, fieldType: typed): untyped =
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else:
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raise newException(ValueError, "Cannot determine bracket expression type of \"" & derivedType.treerepr & "\"")
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# add fetch code for array/seq
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let (jFunc, jKind) = jsonGetFunc($rootType)
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let transIdent = translation.jsonTranslate($rootType)
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var translation: NimNode
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let
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(jFunc, jKind) = jsonGetFunc(($rootType).toLowerAscii)
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transIdent = translation.jsonTranslate($rootType)
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# TODO: Add checks PER ITEM (performance hit!) in the array, if required by the type
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# TODO: Refactor `jsonTranslate` into `translate`
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result.add(quote do:
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`translation`
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for i in 0 ..< `jsonIdent`.len:
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`fieldName`[i] = `transIdent`(`jsonIdent`.elems[i].`jFunc`)
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)
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else:
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echo "DT ", fieldType.treerepr
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echo "DT ", fetchedType.treerepr
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echo "DT ", derivedType.treerepr
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echo "fts ", fieldTypeStr
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echo "JN ", jFetch.treerepr
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raise newException(ValueError, "Unknown type \"" & derivedType.treerepr & "\"")
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when defined(nimDumpRpcs):
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echo result.repr
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proc setupParams(node, parameters, paramsIdent: NimNode) =
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# recurse parameter's fields until we only have symbols
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@ -324,9 +347,10 @@ when isMainModule:
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s.on("rpc.objparam") do(a: string, obj: MyObject):
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result = %obj
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s.on("rpc.specialtypes") do(a: byte):
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result = %int(a)
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# TODO: Add path as constant for each rpc
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s.on("rpc.uinttypes") do(a: byte, b: uint16, c: uint32):
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result = %[int(a), int(b), int(c)]
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s.on("rpc.inttypes") do(a: int8, b: int16, c: int32, d: int8, e: int16, f: int32):
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result = %[int(a), int(b), int(c), int(d), int(e), int(f)]
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suite "Server types":
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test "Array/seq parameters":
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@ -351,11 +375,22 @@ when isMainModule:
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let
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obj = %*{"a": %1, "b": %*{"a": %[5, 0]}, "c": %1.23}
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discard waitFor rpcObjParam(%[%"abc", obj]) # Why doesn't asyncCheck raise?
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test "Special types":
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let r = waitfor rpcSpecialTypes(%[%5])
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check r == %5
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test "Uint types":
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let
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testCase = %[%255, %65534, %4294967295]
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r = waitfor rpcUIntTypes(testCase)
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check r == testCase
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test "Int types":
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let
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testCase = %[
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%(127), %(32767), %(2147483647),
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%(-128), %(-32768), %(-2147483648)
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]
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r = waitfor rpcIntTypes(testCase)
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check r == testCase
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test "Runtime errors":
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expect ValueError:
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echo waitfor rpcArrayParam(%[%[0, 1, 2, 3, 4, 5, 6], %"hello"])
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# TODO: Split runtime strictness checking into defines - is there ever a reason to trust input?
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# TODO: Add path as constant for each rpc
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