Fix negative number handling for snbt parsers

lib/consts.dart

@@ -1,3 +1,4 @@
 class Constants {
-  static const VERSION = "1.3.010625+1127";
+  static const VERSION = "1.3.012225+0304";
+  static const NBT_REVISION = "1.3.012225+0304";
 }

lib/nbt/Stream.dart

@@ -537,7 +537,8 @@ class StringReader {
   // Read a number (int or double)
   String readNumber() {
     StringBuffer result = StringBuffer();
-    while (canRead && (isDigit(peek()) || peek() == '.' || peek() == '-')) {
+    while (canRead &&
+        (isDigit(peek()) || peek() == '.' || peek() == '-' || peek() == "+")) {
       result.write(next());
     }
     return result.toString();

lib/nbt/Tag.dart

@@ -73,6 +73,10 @@ enum TagType {
         break;
       }
 
+      if (val == "-" || val == "+") {
+        reader.next();
+      }
+
       if (val == '{') {
         ret = TagType.Compound; // Detected a CompoundTag
         reader.next(); // Consume '{'

lib/nbt/impl/DoubleTag.dart

@@ -1,3 +1,5 @@
+import 'package:intl/intl.dart';
+
 import '../Stream.dart';
 import '../Tag.dart';
 
@@ -41,13 +43,16 @@ class DoubleTag extends Tag {
 
   @override
   void prettyPrint(int indent, bool recurse) {
+    NumberFormat nf = NumberFormat("###.##", "en_US");
     print(
-        "${"".padLeft(indent, '\t')}${Tag.getCanonicalName(getTagType())}: $value");
+        "${"".padLeft(indent, '\t')}${Tag.getCanonicalName(getTagType())}: ${nf.format(value)}");
   }
 
   @override
   void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
-    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}d");
+    NumberFormat nf = NumberFormat("###.##", "en_US");
+    builder.append(
+        "${isList ? "".padLeft(indent, '\t') : ""}${nf.format(value)}d");
   }
 
   @override

lib/nbt/impl/FloatTag.dart

@@ -1,3 +1,5 @@
+import 'package:intl/intl.dart';
+
 import '../Stream.dart';
 import '../Tag.dart';
 
@@ -40,13 +42,16 @@ class FloatTag extends Tag {
 
   @override
   void prettyPrint(int indent, bool recurse) {
+    NumberFormat nf = NumberFormat("###.##", "en_US");
     print(
-        "${"".padLeft(indent, '\t')}${Tag.getCanonicalName(getTagType())}: $value");
+        "${"".padLeft(indent, '\t')}${Tag.getCanonicalName(getTagType())}: ${nf.format(value)}");
   }
 
   @override
   void writeStringifiedValue(StringBuilder builder, int indent, bool isList) {
-    builder.append("${isList ? "".padLeft(indent, '\t') : ""}${value}f");
+    NumberFormat nf = NumberFormat("###.##", "en_US");
+    builder.append(
+        "${isList ? "".padLeft(indent, '\t') : ""}${nf.format(value)}f");
   }
 
   @override

pubspec.yaml

@@ -1,6 +1,6 @@
 name: libac_dart
 description: "Aria's Creations code library"
-version: 1.3.010625+1127
+version: 1.3.012225+0304
 homepage: "https://zontreck.com"
 
 environment:
@@ -11,6 +11,7 @@ dependencies:
   crypto: ^3.0.3
   dio: ^5.5.0+1
   encrypt: ^5.0.3
+  intl: ^0.20.1
 # path: ^1.8.0
 
 dev_dependencies:

test/nbt_test.dart

@@ -144,4 +144,12 @@ void main() {
     CompoundTag CT =
         await SnbtIo.readFromFile("test/displayLoreTest.snbt") as CompoundTag;
   }, timeout: Timeout(Duration(minutes: 10)));
+
+  test("Test negative numbers from SNBT", () async {
+    String snbt = "{test: -932.0d}";
+
+    CompoundTag ct = await SnbtIo.readFromString(snbt) as CompoundTag;
+    expect(ct["test"]!.getTagType(), TagType.Double);
+    expect(ct["test"]!.asDouble(), -932.0);
+  });
 }