fix #167, if dot found, should always parse as double

Author: taowen

src/main/java/com/jsoniter/IterImplForStreaming.java

@@ -539,15 +539,22 @@ static int readIntSlowPath(final JsonIterator iter, int value) throws IOExceptio
 
     public static final double readDoubleSlowPath(final JsonIterator iter) throws IOException {
         try {
-            String numberAsStr = readNumber(iter);
-            return Double.valueOf(numberAsStr);
+            numberChars numberChars = readNumber(iter);
+            return Double.valueOf(new String(numberChars.chars, 0, numberChars.charsLength));
         } catch (NumberFormatException e) {
             throw iter.reportError("readDoubleSlowPath", e.toString());
         }
     }
 
-    public static final String readNumber(final JsonIterator iter) throws IOException {
+    static class numberChars {
+        char[] chars;
+        int charsLength;
+        boolean dotFound;
+    }
+
+    public static final numberChars readNumber(final JsonIterator iter) throws IOException {
         int j = 0;
+        boolean dotFound = false;
         for (; ; ) {
             for (int i = iter.head; i < iter.tail; i++) {
                 if (j == iter.reusableChars.length) {
@@ -557,11 +564,13 @@ public static final String readNumber(final JsonIterator iter) throws IOExceptio
                 }
                 byte c = iter.buf[i];
                 switch (c) {
-                    case '-':
-                    case '+':
                     case '.':
                     case 'e':
                     case 'E':
+                        dotFound = true;
+                        // fallthrough
+                    case '-':
+                    case '+':
                     case '0':
                     case '1':
                     case '2':
@@ -576,12 +585,20 @@ public static final String readNumber(final JsonIterator iter) throws IOExceptio
                         break;
                     default:
                         iter.head = i;
-                        return new String(iter.reusableChars, 0, j);
+                        numberChars numberChars = new numberChars();
+                        numberChars.chars = iter.reusableChars;
+                        numberChars.charsLength = j;
+                        numberChars.dotFound = dotFound;
+                        return numberChars;
                 }
             }
             if (!IterImpl.loadMore(iter)) {
                 iter.head = iter.tail;
-                return new String(iter.reusableChars, 0, j);
+                numberChars numberChars = new numberChars();
+                numberChars.chars = iter.reusableChars;
+                numberChars.charsLength = j;
+                numberChars.dotFound = dotFound;
+                return numberChars;
             }
         }
     }

src/main/java/com/jsoniter/JsonIterator.java

@@ -190,7 +190,8 @@ public final boolean readArray() throws IOException {
     }
 
     public String readNumberAsString() throws IOException {
-        return IterImplForStreaming.readNumber(this);
+        IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);
+        return new String(numberChars.chars, 0, numberChars.charsLength);
     }
 
     public static interface ReadArrayCallback {
@@ -239,7 +240,8 @@ public final BigDecimal readBigDecimal() throws IOException {
         if (valueType != ValueType.NUMBER) {
             throw reportError("readBigDecimal", "not number");
         }
-        return new BigDecimal(IterImplForStreaming.readNumber(this));
+        IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);
+        return new BigDecimal(numberChars.chars, 0, numberChars.charsLength);
     }
 
     public final BigInteger readBigInteger() throws IOException {
@@ -252,7 +254,8 @@ public final BigInteger readBigInteger() throws IOException {
         if (valueType != ValueType.NUMBER) {
             throw reportError("readBigDecimal", "not number");
         }
-        return new BigInteger(IterImplForStreaming.readNumber(this));
+        IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);
+        return new BigInteger(new String(numberChars.chars, 0, numberChars.charsLength));
     }
 
     public final Any readAny() throws IOException {
@@ -288,9 +291,14 @@ public final Object read() throws IOException {
                 case STRING:
                     return readString();
                 case NUMBER:
-                    double number = readDouble();
-                    if (number == Math.floor(number) && !Double.isInfinite(number)) {
-                        long longNumber = (long) number;
+                    IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(this);
+                    Double number = Double.valueOf(new String(numberChars.chars, 0, numberChars.charsLength));
+                    if (numberChars.dotFound) {
+                        return number;
+                    }
+                    double doubleNumber = number;
+                    if (doubleNumber == Math.floor(doubleNumber) && !Double.isInfinite(doubleNumber)) {
+                        long longNumber = (long) doubleNumber;
                         if (longNumber <= Integer.MAX_VALUE && longNumber >= Integer.MIN_VALUE) {
                             return (int) longNumber;
                         }

src/test/java/com/jsoniter/IterImplForStreamingTest.java

@@ -7,7 +7,8 @@ public class IterImplForStreamingTest extends TestCase {
 	public void testReadMaxDouble() throws Exception {
 		String maxDouble = "1.7976931348623157e+308";
 		JsonIterator iter = JsonIterator.parse("1.7976931348623157e+308");
-		String number = IterImplForStreaming.readNumber(iter);
+		IterImplForStreaming.numberChars numberChars = IterImplForStreaming.readNumber(iter);
+		String number = new String(numberChars.chars, 0, numberChars.charsLength);
 		assertEquals(maxDouble, number);
 	}
 }

src/test/java/com/jsoniter/TestFloat.java

@@ -1,5 +1,6 @@
 package com.jsoniter;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
 import junit.framework.TestCase;
 import org.junit.experimental.categories.Category;
 
@@ -86,5 +87,7 @@ public void testBigDecimal() {
     public void testChooseDouble() {
         Object number = JsonIterator.deserialize("1.1", Object.class);
         assertEquals(1.1, number);
+        number = JsonIterator.deserialize("1.0", Object.class);
+        assertEquals(1.0, number);
     }
 }