fix(android): Avoid Math floor APIs

CHANGELOG.md

@@ -22,6 +22,7 @@
 
 ### Fixes
 
+- Fix `NoSuchMethodError` when using `Math.floorDiv`/`Math.floorMod` on Android < 24 ([#5743](https://github.com/getsentry/sentry-java/pull/5743))
 - Fix main thread identification parsing for ApplicationExitInfo ANRs ([#5733](https://github.com/getsentry/sentry-java/pull/5733))
 - Do not send threads without stacktraces for ApplicationExitInfo ANRs ([#5733](https://github.com/getsentry/sentry-java/pull/5733))
 - Record byte-level client reports when event processors discard logs or trace metrics ([#5718](https://github.com/getsentry/sentry-java/pull/5718))

THIRD_PARTY_NOTICES.md

@@ -34,6 +34,34 @@ limitations under the License.
 
 ---
 
+## Google Guava — LongMath (Apache 2.0)
+
+**Source:** https://github.com/google/guava/blob/v33.0.0/guava/src/com/google/common/math/LongMath.java<br>
+**License:** Apache License 2.0<br>
+**Copyright:** Copyright (C) 2011 The Guava Authors
+
+### Scope
+
+The Sentry Java SDK includes adapted floor division logic from Guava's `LongMath` class to support older Android API levels. The code resides in `io.sentry.vendor.SentryMath`.
+
+```
+Copyright (C) 2011 The Guava Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```
+
+---
+
 ## FasterXML Jackson — ISO8601Utils (Apache 2.0)
 
 **Source:** https://github.com/FasterXML/jackson-databind<br>

sentry/src/main/java/io/sentry/vendor/SentryIso8601Utils.java

@@ -142,8 +142,8 @@ public static long parseTimestamp(final @NotNull String timestamp) {
       return formatTimestampWithCalendar(millis);
     }
 
-    final long epochDay = Math.floorDiv(millis, MILLIS_PER_DAY);
-    int millisOfDay = (int) Math.floorMod(millis, MILLIS_PER_DAY);
+    final long epochDay = SentryMath.floorDiv(millis, MILLIS_PER_DAY);
+    int millisOfDay = (int) SentryMath.floorMod(millis, MILLIS_PER_DAY);
 
     final int[] yearMonthDay = epochDayToYearMonthDay(epochDay);
     final int hour = millisOfDay / (int) MILLIS_PER_HOUR;
@@ -281,7 +281,7 @@ private static long epochMillis(
 
   private static long daysFromYearMonthDay(int year, final int month, final int day) {
     year -= month <= 2 ? 1 : 0;
-    final long era = Math.floorDiv(year, 400);
+    final long era = SentryMath.floorDiv(year, 400L);
     final int yearOfEra = (int) (year - era * 400);
     final int dayOfYear = (153 * (month + (month > 2 ? -3 : 9)) + 2) / 5 + day - 1;
     final int dayOfEra = yearOfEra * 365 + yearOfEra / 4 - yearOfEra / 100 + dayOfYear;
@@ -290,7 +290,7 @@ private static long daysFromYearMonthDay(int year, final int month, final int da
 
   private static int[] epochDayToYearMonthDay(long epochDay) {
     epochDay += DAYS_0000_TO_1970;
-    final long era = Math.floorDiv(epochDay, 146097);
+    final long era = SentryMath.floorDiv(epochDay, 146097L);
     final int dayOfEra = (int) (epochDay - era * 146097);
     final int yearOfEra = (dayOfEra - dayOfEra / 1460 + dayOfEra / 36524 - dayOfEra / 146096) / 365;
     final int year = (int) (yearOfEra + era * 400);

sentry/src/main/java/io/sentry/vendor/SentryMath.java

@@ -0,0 +1,40 @@
+/*
+ * Adapted from https://github.com/google/guava/blob/v33.0.0/guava/src/com/google/common/math/LongMath.java
+ *
+ * Copyright (C) 2011 The Guava Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.sentry.vendor;
+
+final class SentryMath {
+
+  private SentryMath() {}
+
+  static long floorDiv(final long x, final long y) {
+    final long quotient = x / y;
+    final long remainder = x - y * quotient;
+
+    if (remainder == 0) {
+      return quotient;
+    }
+
+    final int signum = 1 | (int) ((x ^ y) >> (Long.SIZE - 1));
+    return signum < 0 ? quotient + signum : quotient;
+  }
+
+  static long floorMod(final long x, final long y) {
+    return x - floorDiv(x, y) * y;
+  }
+}

sentry/src/test/java/io/sentry/vendor/SentryMathTest.kt

@@ -0,0 +1,58 @@
+package io.sentry.vendor
+
+import com.google.common.truth.Truth.assertThat
+import kotlin.test.Test
+import kotlin.test.assertFailsWith
+
+class SentryMathTest {
+  @Test
+  fun `floorDiv matches Java Math floorDiv`() {
+    values.forEach { x ->
+      divisors.forEach { y -> assertThat(SentryMath.floorDiv(x, y)).isEqualTo(Math.floorDiv(x, y)) }
+    }
+  }
+
+  @Test
+  fun `floorMod matches Java Math floorMod`() {
+    values.forEach { x ->
+      divisors.forEach { y -> assertThat(SentryMath.floorMod(x, y)).isEqualTo(Math.floorMod(x, y)) }
+    }
+  }
+
+  @Test
+  fun `floorDiv throws when dividing by zero`() {
+    assertFailsWith<ArithmeticException> { SentryMath.floorDiv(1L, 0L) }
+  }
+
+  @Test
+  fun `floorMod throws when dividing by zero`() {
+    assertFailsWith<ArithmeticException> { SentryMath.floorMod(1L, 0L) }
+  }
+
+  private companion object {
+    val values =
+      listOf(
+        Long.MIN_VALUE,
+        -86_400_001L,
+        -86_400_000L,
+        -86_399_999L,
+        -401L,
+        -400L,
+        -399L,
+        -2L,
+        -1L,
+        0L,
+        1L,
+        2L,
+        399L,
+        400L,
+        401L,
+        86_399_999L,
+        86_400_000L,
+        86_400_001L,
+        Long.MAX_VALUE,
+      )
+
+    val divisors = listOf(Long.MIN_VALUE, -146_097L, -400L, -1L, 1L, 400L, 146_097L, Long.MAX_VALUE)
+  }
+}