initial commits

README.md

@@ -1,27 +1,27 @@
-# go-iid
+# go-xim
 
-Package **iid** provides quazi‐ monotonically‐increasing unique‐identifiers.
+Package **xim** provides quazi‐ monotonically‐increasing unique‐identifiers.
 
-The serialized form of the **IID** is safe to use as a _file_ or _directory_ name.
+The serialized form of the **xim-id** is safe to use as a _file_ or _directory_ name.
 
 
 ## Documention
 
-Online documentation, which includes examples, can be found at: http://godoc.org/github.com/reiver/go-iid
+Online documentation, which includes examples, can be found at: http://godoc.org/github.com/reiver/go-xim
 
-[![GoDoc](https://godoc.org/github.com/reiver/go-iid?status.svg)](https://godoc.org/github.com/reiver/go-iid)
+[![GoDoc](https://godoc.org/github.com/reiver/go-xim?status.svg)](https://godoc.org/github.com/reiver/go-xim)
 
 
 ## Example
 
-Here is an example of using `package iid`:
+Here is an example of using `package xim`:
 ```go
-var id iid.IID = iid.Generate()
+var id xim.ID = xim.Generate()
 ```
 
 ## Representation
 
-Internally, the IID is compactly stored in an `uint64`. The anatomy of this is as follows:
+Internally, the **xim-id** is compactly stored in an `uint64`. The anatomy of this is as follows:
 ```
                    unix timestamp (39-bits)
        ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
@@ -30,11 +30,11 @@ Internally, the IID is compactly stored in an `uint64`. The anatomy of this is a
   always zero (1-bit)                                  chaos (20-bits)
 ```
 
-The `iid.IID.UnixTime()` method will give you that 39-bit _unix timestamp_.
+The `xim.ID.UnixTime()` method will give you that 39-bit _unix timestamp_.
 
-And the `iid.IID.Chaos()` method will give you that 24-bit _chaos_.
+And the `xim.ID.Chaos()` method will give you that 24-bit _chaos_.
 
-(The _chaos_ is just a randomness that helps make these IIDs unique, when multiple IIDs are being produced simultaneously.)
+(The _chaos_ is just a randomness that helps make these **xim-ids** unique, when multiple **xim-ids** are being produced simultaneously.)
 
 ## Temporal Ordering of Representation
 
@@ -203,3 +203,7 @@ The advantage of this is that lexical-ordering (in Unicode & ASCII) is also symb
 One design goal is that lexical ordering of the **xim** strings is (almost always) also temporal ordering of the **xim** strings.
 
 Another design goal of it is that these **xim** strings should be able to be used as a file-name, or a directory-name.
+
+## See Also:
+
+* https://github.com/reiver/xim-id

compile.go

@@ -5,8 +5,8 @@ const (
 )
 
 const (
-	maskfirst  = 0b0111111111111111111111111111111111111111000000000000000000000000
+	maskunixtime = 0b0111111111111111111111111111111111111111000000000000000000000000
-	masksecond = 0b0000000000000000000000000000000000000000111111111111111111111111
+	maskchaos    = 0b0000000000000000000000000000000000000000111111111111111111111111
 )
 
 const (
@@ -16,7 +16,7 @@ const (
 
 func compile(first uint64, second uint64) uint64 {
 
-	var compiled uint64 = ((first << widthsecond) & maskfirst) | (second & masksecond)
+	var compiled uint64 = ((first << widthsecond) & maskunixtime) | (second & maskchaos)
 
 	return compiled
 
@@ -24,8 +24,8 @@ func compile(first uint64, second uint64) uint64 {
 
 func decompile(value uint64) (uint64, uint64) {
 
-	var first  uint64 = (value & maskfirst) >> widthsecond
+	var first  uint64 = (value & maskunixtime) >> widthsecond
-	var second uint64 =  value & masksecond
+	var second uint64 =  value & maskchaos
 
 	return first, second
 }

generate.go

@@ -11,10 +11,15 @@ var (
 
 func generate() uint64 {
 
-	var now    int64 = time.Now().Unix()
+	var now int64 = time.Now().Unix()
+	return generateforunixtime(now)
+}
+
+func generateforunixtime(unixtimestamp int64) uint64 {
 	var chaos uint64 = randomness.Uint64()
 
-	var value uint64 = compile(uint64(now), chaos)
+	var value uint64 = compile(uint64(unixtimestamp), chaos)
 
 	return value
+
 }

id.go

@@ -0,0 +1,210 @@
+package xim
+
+import (
+	"time"
+)
+
+// ID represents a xim-id.
+//
+// It is a scheme used to generate quazi‐monotonically‐increasing‐unique identifier.
+//
+// This can be used for anything that needs a unique-identifier. And its serialization should be safe to use as a file-name, or a directory-name.
+//
+// Example usage:
+//
+//	var id xim.ID = xim.Generate()
+//	
+//	fmt.Println("xim-id =", id)
+type ID struct {
+	value uint64
+	loaded bool
+}
+
+// ID is an option-type. Nothing returns the nothing value for the option-type.
+//
+// An example usage might be:
+//
+//	if xim.Nothing() == id {
+//		//@TODO
+//	}
+func Nothing() ID {
+	return ID{}
+}
+
+// ID is an option-type. something returns a something value for the option-type, that contains the value of the input variable ‘value’ inside of it.
+func something(value uint64) ID {
+	return ID{
+		value:value,
+		loaded:true,
+	}
+}
+
+// Parse parses the string contained in the input-variable ‘ximnotation’, and if it contains a valid xim-id (in xim-notation), then it returns it.
+//
+// If the value of the input-variable ‘ximnotation’ is not a valid (xim-notation) xim-id, then it returns the option-type value nothing.
+//
+// An example usage might be:
+//
+//	var ximid string = "xi-558YtmR06wm"
+//	
+//	// ...
+//	
+//	var id xim.ID = xim.Parse(ximid)
+//	if xim.Nothing() == id {
+//		fmt.Fprintf(os.Stderr, "error: invalid xim-id — %q \n", ximid)
+//		return
+//	}
+//
+//	fmt.Printf("SUCCESS! the xim-id is \n", id)
+func Parse(ximnotation string) ID {
+
+	value, successful := unserialize(ximnotation)
+	if !successful {
+		return  Nothing()
+	}
+
+	return something(value)
+}
+
+// Generate returns a new xim-id.
+//
+// Example usage:
+//
+//	var id xim.ID = xim.Generate()
+//	
+//	fmt.Println("xim-id =", id)
+func Generate() ID {
+
+	var value uint64 = generate()
+
+	return something(value)
+}
+
+// GenerateForTime returns a new xim-id that has embedded in it the time given by the value in the input-variable ‘when’.
+//
+// Example usage:
+//
+//	var moment time.Time = ???
+//	
+//	// ...
+//	
+//	var id xim.ID = xim.GenerateForTime(moment)
+//	
+//	fmt.Println("xim-id =", id)
+//
+// The chaos part of this xim-id will be chosen randomly (just like with xim.Generate()).
+func GenerateForTime(when time.Time) ID {
+
+	var unixtimestamp int64 = when.Unix()
+
+	var value uint64 = generateforunixtime(unixtimestamp)
+
+	return something(value)
+}
+
+// GenerateForUnixTime returns a new xim-id that has embedded in it the time given by the unix-timestamp in the input-variable ‘unixtimestamp’.
+//
+// Example usage:
+//
+//	var unixTimeStamp int32 = 1636403305 // I.e., Monday, November 8, 2021 12:28:25 PM GMT-08:00
+//	
+//	var id xim.ID = xim.GenerateForUnixTime(unixTimeStamp)
+//	
+//	fmt.Println("xim-id =", id)
+//
+// The chaos part of this xim-id will be chosen randomly (just like with xim.Generate()).
+func GenerateForUnixTime(unixtimestamp int32) ID {
+
+	var when int64 = int64(unixtimestamp)
+
+	var value uint64 = generateforunixtime(when)
+
+	return something(value)
+}
+
+// Chaos returns the randomness that is embeddd in the xim-id.
+//
+// Example usage:
+//
+//	var id xim.ID = xim.Generate()
+//	
+//	chaos, successful := id.Chaos()
+//	if !successful {
+//		return errors.New("xim-id was not initialized")
+//	}
+//	
+//	fmt.Printf("chaos = %#020b \n", chaos)
+func (receiver ID) Chaos() (uint64, bool) {
+	if Nothing() == receiver {
+		return 0, false
+	}
+
+	_, value := decompile(receiver.value)
+
+	return value, true
+}
+
+// MarshalText makes xim.ID fit the encoding.TextMarshaler interface.
+func (receiver ID) MarshalText() (text []byte, err error) {
+	if Nothing() == receiver {
+		return nil, errNothing
+	}
+
+	var serialized string = serialize(receiver.value)
+
+	return []byte(serialized), nil
+}
+
+// String makes xim.ID fit the fmt.Stringer interface.
+//
+// String also returns the serialized for of a xim-id, in xim-notation.
+func (receiver ID) String() string {
+	if Nothing() == receiver {
+		return ""
+	}
+
+	var serialized string = serialize(receiver.value)
+
+	return serialized
+}
+
+// UnixTime returns the unix‐time that is embeddd in the xim-id.
+//
+// Example usage:
+//
+//	var id xim.ID = xim.Generate()
+//	
+//	unixtime, successful := id.UnixTime()
+//	if !successful {
+//		return errors.New("xim-id was not initialized")
+//	}
+//	
+//	var t time.Time = time.Unix(unixtime, 0)
+//	
+//	fmt.Println("xim-id was created on:", t)
+func (receiver ID) UnixTime() (int64, bool) {
+	if Nothing() == receiver {
+		return 0, false
+	}
+
+	value, _ := decompile(receiver.value)
+
+	return int64(value), true
+}
+
+// UnmarshalText makes xim.ID fit the encoding.TextUnmarshaler interface.
+func (receiver *ID) UnmarshalText(p []byte) error {
+	if nil == receiver {
+		return errNilReceiver
+	}
+
+	var serialized string = string(p)
+
+	value, successful := unserialize(serialized)
+	if !successful {
+		return  errBadRequest
+	}
+
+	*receiver = something(value)
+	return nil
+}

id_marshaltext_test.go

@@ -4,17 +4,17 @@ import (
 	"testing"
 )
 
-func TestIID_MarshalText(t *testing.T) {
+func TestID_MarshalText(t *testing.T) {
 
 	for testNumber, test := range stdtests {
 
-		var intid IID = something(test.Value)
+		var id ID = something(test.Value)
 
 		var marshaled []byte
 		{
 			var err error
 
-			marshaled, err = intid.MarshalText()
+			marshaled, err = id.MarshalText()
 			if nil != err {
 				t.Errorf("For test #%d, did not expect an error when mashaling, but actually got one.", testNumber)
 				t.Logf("VALUE: %064b", test.Value)
@@ -30,9 +30,9 @@ func TestIID_MarshalText(t *testing.T) {
 		}
 
 		{
-			var newintid IID
+			var newid ID
 
-			err := newintid.UnmarshalText(marshaled)
+			err := newid.UnmarshalText(marshaled)
 			if nil != err {
 				t.Errorf("For test #%d, did not expect an error when unmashaling, but actually got one.", testNumber)
 				t.Logf("VALUE: %064b", test.Value)
@@ -42,8 +42,8 @@ func TestIID_MarshalText(t *testing.T) {
 			}
 
 
-			var expected IID = intid
+			var expected ID = id
-			var actual   IID = newintid
+			var actual   ID = newid
 
 			if expected != actual {
 				t.Errorf("For test #%d, the actual unmarshaled marshaled value is not what was expected.", testNumber)

iid.go

@@ -1,86 +0,0 @@
-package xim
-
-// IID represents an interaction‐identifier — i.e., an interaction‐ID — i.e., an IID.
-//
-// It is a scheme used to generate quazi‐monotonically‐increasing‐unique.
-type IID struct {
-	value uint64
-	loaded bool
-}
-
-func Nothing() IID {
-	return IID{}
-}
-
-func something(value uint64) IID {
-	return IID{
-		value:value,
-		loaded:true,
-	}
-}
-
-// Generate creates a new interaction‐identifier — i.e., an interaction‐ID — i.e., an IID.
-func Generate() IID {
-
-	var value uint64 = generate()
-
-	return something(value)
-}
-
-// Chaos returns the randomness that is embeddd in the interaction‐identifier — i.e., an interaction‐ID — i.e., an IID.
-func (receiver IID) Chaos() (uint64, bool) {
-	if Nothing() == receiver {
-		return 0, false
-	}
-
-	_, value := decompile(receiver.value)
-
-	return value, true
-}
-
-func (receiver IID) String() string {
-	if Nothing() == receiver {
-		return ""
-	}
-
-	var serialized string = serialize(receiver.value)
-
-	return serialized
-}
-
-func (receiver IID) MarshalText() (text []byte, err error) {
-	if Nothing() == receiver {
-		return nil, errNothing
-	}
-
-	var serialized string = serialize(receiver.value)
-
-	return []byte(serialized), nil
-}
-
-// UnixTime returns the unix‐time that is embeddd in the interaction‐identifier — i.e., an interaction‐ID — i.e., an IID.
-func (receiver IID) UnixTime() (int64, bool) {
-	if Nothing() == receiver {
-		return 0, false
-	}
-
-	value, _ := decompile(receiver.value)
-
-	return int64(value), true
-}
-
-func (receiver *IID) UnmarshalText(p []byte) error {
-	if nil == receiver {
-		return errNilReceiver
-	}
-
-	var serialized string = string(p)
-
-	value, successful := unserialize(serialized)
-	if !successful {
-		return  errBadRequest
-	}
-
-	*receiver = something(value)
-	return nil
-}

parse_test.go

@@ -0,0 +1,58 @@
+package xim
+
+import (
+	"testing"
+)
+
+func TestParse(t *testing.T) {
+
+	for testNumber, test := range stdtests {
+
+		var id ID = something(test.Value)
+
+		var ximid string = id.String()
+
+		var actual ID = Parse(ximid)
+		if Nothing() == actual {
+			t.Errorf("For test #%d, the actual result of parsing is not what was expected — it is option-type value nothing" , testNumber)
+			t.Logf("VALUE:    %#064b", test.Value)
+			t.Logf("ID:     %s", id)
+			{
+				chaos, successful := id.Chaos()
+				t.Logf("ID-CHAOS-SUCCESSFUL: %t", successful)
+				t.Logf("ID-CHAOS: %#064b", chaos)
+			}
+			t.Logf("XIM-ID: %s", ximid)
+			t.Logf("ACTUAL: %s", actual)
+			continue
+		}
+
+		{
+			actualchaos, successful := id.Chaos()
+			if !successful {
+				t.Errorf("For test #%d, the actual result of parsing is not what was expected — it is option-type value nothing" , testNumber)
+				t.Logf("VALUE:    %#064b", test.Value)
+				t.Logf("ID:     %s", id)
+				{
+					chaos, successful := id.Chaos()
+					t.Logf("ID-CHAOS-SUCCESSFUL: %t", successful)
+					t.Logf("ID-CHAOS: %#064b", chaos)
+				}
+				t.Logf("XIM-ID: %s", ximid)
+				t.Logf("ACTUAL: %s", actual)
+				continue
+			}
+
+			if expectedchaos := test.Value & maskchaos; expectedchaos != actualchaos {
+				t.Errorf("For test #%d, the chaos from the actual result of parsing is not what was expected" , testNumber)
+				t.Logf("VALUE:          %#064b", test.Value)
+				t.Logf("ID:     %s", id)
+				t.Logf("XIM-ID: %s", ximid)
+				t.Logf("ACTUAL: %s", actual)
+				t.Logf("ACTUAL-CHAOS:   %#064b", actualchaos)
+				t.Logf("EXPECTED-CHAOS: %#064b", expectedchaos)
+				continue
+			}
+		}
+	}
+}