diff options
| -rw-r--r-- | core/java/android/os/FileUtils.java | 81 | ||||
| -rw-r--r-- | core/tests/coretests/src/android/os/FileUtilsTest.java | 50 |
2 files changed, 131 insertions, 0 deletions
diff --git a/core/java/android/os/FileUtils.java b/core/java/android/os/FileUtils.java index edfcb3d6f12a..d5c3de146015 100644 --- a/core/java/android/os/FileUtils.java +++ b/core/java/android/os/FileUtils.java @@ -54,6 +54,7 @@ import android.system.ErrnoException; import android.system.Os; import android.system.StructStat; import android.text.TextUtils; +import android.util.DataUnit; import android.util.Log; import android.util.Slog; import android.webkit.MimeTypeMap; @@ -83,6 +84,7 @@ import java.security.NoSuchAlgorithmException; import java.util.Arrays; import java.util.Collection; import java.util.Comparator; +import java.util.List; import java.util.Objects; import java.util.concurrent.Executor; import java.util.concurrent.TimeUnit; @@ -1309,6 +1311,85 @@ public final class FileUtils { return val * pow; } + private static long toBytes(long value, String unit) { + unit = unit.toUpperCase(); + + if (List.of("B").contains(unit)) { + return value; + } + + if (List.of("K", "KB").contains(unit)) { + return DataUnit.KILOBYTES.toBytes(value); + } + + if (List.of("M", "MB").contains(unit)) { + return DataUnit.MEGABYTES.toBytes(value); + } + + if (List.of("G", "GB").contains(unit)) { + return DataUnit.GIGABYTES.toBytes(value); + } + + if (List.of("KI", "KIB").contains(unit)) { + return DataUnit.KIBIBYTES.toBytes(value); + } + + if (List.of("MI", "MIB").contains(unit)) { + return DataUnit.MEBIBYTES.toBytes(value); + } + + if (List.of("GI", "GIB").contains(unit)) { + return DataUnit.GIBIBYTES.toBytes(value); + } + + return Long.MIN_VALUE; + } + + /** + * @param fmtSize The string that contains the size to be parsed. The + * expected format is: + * + * <p>"^((\\s*[-+]?[0-9]+)\\s*(B|K|KB|M|MB|G|GB|Ki|KiB|Mi|MiB|Gi|GiB)\\s*)$" + * + * <p>For example: 10Kb, 500GiB, 100mb. The unit is not case sensitive. + * + * @return the size in bytes. If {@code fmtSize} has invalid format, it + * returns {@link Long#MIN_VALUE}. + * @hide + */ + public static long parseSize(@Nullable String fmtSize) { + if (fmtSize == null || fmtSize.isBlank()) { + return Long.MIN_VALUE; + } + + int sign = 1; + fmtSize = fmtSize.trim(); + char first = fmtSize.charAt(0); + if (first == '-' || first == '+') { + if (first == '-') { + sign = -1; + } + + fmtSize = fmtSize.replace(first + "", ""); + } + + int index = 0; + // Find the last index of the value in fmtSize. + while (index < fmtSize.length() && Character.isDigit(fmtSize.charAt(index))) { + index++; + } + + // Check if number and units are present. + if (index == 0 || index == fmtSize.length()) { + return Long.MIN_VALUE; + } + + long value = sign * Long.valueOf(fmtSize.substring(0, index)); + String unit = fmtSize.substring(index).trim(); + + return toBytes(value, unit); + } + /** * Closes the given object quietly, ignoring any checked exceptions. Does * nothing if the given object is {@code null}. diff --git a/core/tests/coretests/src/android/os/FileUtilsTest.java b/core/tests/coretests/src/android/os/FileUtilsTest.java index 32c3a268153c..91fbe0034133 100644 --- a/core/tests/coretests/src/android/os/FileUtilsTest.java +++ b/core/tests/coretests/src/android/os/FileUtilsTest.java @@ -532,6 +532,56 @@ public class FileUtilsTest { } @Test + public void testParseSize() { + assertEquals(0L, FileUtils.parseSize("0MB")); + assertEquals(1_024L, FileUtils.parseSize("1024b")); + assertEquals(-1L, FileUtils.parseSize(" -1 b ")); + assertEquals(0L, FileUtils.parseSize(" -0 gib ")); + assertEquals(1_000L, FileUtils.parseSize("1K")); + assertEquals(1_000L, FileUtils.parseSize("1KB")); + assertEquals(10_000L, FileUtils.parseSize("10KB")); + assertEquals(100_000L, FileUtils.parseSize("100KB")); + assertEquals(1_000_000L, FileUtils.parseSize("1000KB")); + assertEquals(1_024_000L, FileUtils.parseSize("1000KiB")); + assertEquals(70_000_000L, FileUtils.parseSize("070M")); + assertEquals(70_000_000L, FileUtils.parseSize("070MB")); + assertEquals(73_400_320L, FileUtils.parseSize("70MiB")); + assertEquals(700_000_000L, FileUtils.parseSize("700000KB")); + assertEquals(200_000_000L, FileUtils.parseSize("+200MB")); + assertEquals(1_000_000_000L, FileUtils.parseSize("1000MB")); + assertEquals(1_000_000_000L, FileUtils.parseSize("+1000 mb")); + assertEquals(644_245_094_400L, FileUtils.parseSize("600GiB")); + assertEquals(999_000_000_000L, FileUtils.parseSize("999GB")); + assertEquals(999_000_000_000L, FileUtils.parseSize("999 gB")); + assertEquals(9_999_000_000_000L, FileUtils.parseSize("9999GB")); + assertEquals(9_000_000_000_000L, FileUtils.parseSize(" 9000 GB ")); + assertEquals(1_234_000_000_000L, FileUtils.parseSize(" 1234 GB ")); + assertEquals(1_234_567_890_000L, FileUtils.parseSize(" 1234567890 KB ")); + } + + @Test + public void testParseSize_invalidArguments() { + assertEquals(Long.MIN_VALUE, FileUtils.parseSize(null)); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("null")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize(" ")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("KB")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("123 dd")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("Invalid")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize(" ABC890 KB ")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("-=+90 KB ")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("123")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("--123")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("-KB")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("++123")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("+")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("+ 1 +")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("+--+ 1 +")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize("1GB+")); + assertEquals(Long.MIN_VALUE, FileUtils.parseSize(" + 1234567890 KB ")); + } + + @Test public void testTranslateMode() throws Exception { assertTranslate("r", O_RDONLY, MODE_READ_ONLY); |