runtime/bin/vmservice/observatory/lib/src/app/utils.dart - Issue 837723004: Build Observatory as part of runtime

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Issue 837723004: Build Observatory as part of runtime (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart

Patch Set: Created 5 years, 11 months ago

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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file

2 // for details. All rights reserved. Use of this source code is governed by a

3 // BSD-style license that can be found in the LICENSE file.

4

5 part of app;

6

7 class Utils {

8 static String formatPercent(num a, num total) {

9 var percent = 100.0 * (a / total);

10 return '${percent.toStringAsFixed(2)}%';

11 }

12

13 static String zeroPad(int value, int pad) {

14 String prefix = "";

15 while (pad > 1) {

16 int pow10 = pow(10, pad - 1);

17 if (value < pow10) {

18 prefix = prefix + "0";

19 }

20 pad--;

21 }

22 return "${prefix}${value}";

23 }

24

25 static String formatCommaSeparated(int v) {

26 const COMMA_EVERY = 1000;

27 if (v < COMMA_EVERY) {

28 return v.toString();

29 }

30 var mod = v % COMMA_EVERY;

31 v ~/= COMMA_EVERY;

32 var r = '${zeroPad(mod, 3)}';

33 while (v > COMMA_EVERY) {

34 mod = v % COMMA_EVERY;

35 r = '${zeroPad(mod, 3)},$r';

36 v ~/= COMMA_EVERY;

37 }

38 if (v != 0) {

39 r = '$v,$r';

40 }

41 return r;

42 }

43

44 static String formatTimePrecise(double time) {

45 if (time == null) {

46 return "-";

47 }

48 const millisPerHour = 60 * 60 * 1000;

49 const millisPerMinute = 60 * 1000;

50 const millisPerSecond = 1000;

51

52 var millis = (time * millisPerSecond).round();

53

54 var hours = millis ~/ millisPerHour;

55 millis = millis % millisPerHour;

56

57 var minutes = millis ~/ millisPerMinute;

58 millis = millis % millisPerMinute;

59

60 var seconds = millis ~/ millisPerSecond;

61 millis = millis % millisPerSecond;

62

63 if (hours > 0) {

64 return ("${zeroPad(hours,2)}"

65 ":${zeroPad(minutes,2)}"

66 ":${zeroPad(seconds,2)}"

67 ".${zeroPad(millis,3)}");

68 } else {

69 return ("${zeroPad(minutes,2)}"

70 ":${zeroPad(seconds,2)}"

71 ".${zeroPad(millis,3)}");

72 }

73 }

74

75 static String formatSize(int bytes) {

76 const int digits = 1;

77 const int bytesPerKB = 1024;

78 const int bytesPerMB = 1024 * bytesPerKB;

79 const int bytesPerGB = 1024 * bytesPerMB;

80 const int bytesPerTB = 1024 * bytesPerGB;

81

82 if (bytes < bytesPerKB) {

83 return "${bytes}B";

84 } else if (bytes < bytesPerMB) {

85 return "${(bytes / bytesPerKB).toStringAsFixed(digits)}KB";

86 } else if (bytes < bytesPerGB) {

87 return "${(bytes / bytesPerMB).toStringAsFixed(digits)}MB";

88 } else if (bytes < bytesPerTB) {

89 return "${(bytes / bytesPerGB).toStringAsFixed(digits)}GB";

90 } else {

91 return "${(bytes / bytesPerTB).toStringAsFixed(digits)}TB";

92 }

93 }

94

95 static String formatTime(double time) {

96 if (time == null) {

97 return "-";

98 }

99 const millisPerHour = 60 * 60 * 1000;

100 const millisPerMinute = 60 * 1000;

101 const millisPerSecond = 1000;

102

103 var millis = (time * millisPerSecond).round();

104

105 var hours = millis ~/ millisPerHour;

106 millis = millis % millisPerHour;

107

108 var minutes = millis ~/ millisPerMinute;

109 millis = millis % millisPerMinute;

110

111 var seconds = millis ~/ millisPerSecond;

112

113 StringBuffer out = new StringBuffer();

114 if (hours != 0) {

115 return '${hours}h ${minutes}m ${seconds}s';

116 }

117 if (minutes != 0) {

118 return '${minutes}m ${seconds}s';

119 }

120 return '${seconds}s';

121 }

122

123 static String formatSeconds(double x) {

124 return x.toStringAsFixed(2);

125 }

126

127 static bool runningInJavaScript() => identical(1.0, 1);

128 }

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