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Re: [PATCH 5/6] Use floating point for --dirstat percentages

From
Johan Herland <johan@herland.net>
Date
Apr 27, 2011, 02:02 UTC
Message-ID
<201104270402.29085.johan@herland.net>
In-Reply-To
<7vpqo9ez03.fsf@alter.siamese.dyndns.org>
On Tuesday 26 April 2011, Junio C Hamano wrote:
Show 17 quoted lines
> Johan Herland <johan@herland.net> writes:
> > Allow specifying --dirstat cut-off percentage as a floating point
> > number.
> > 
> > When printing the dirstat output, floating point numbers are presented
> > in rounded form (as opposed to truncated).
> 
> Why isn't it sufficient to change
> 
> 	permille = this_dir * 1000 / changed
> 
> to
> 
> 	permille = (this_dir * 2000 + changed) / (changed * 2)
> 
> or something?  If rounding is the only issue that bothers you (I admit
> that it does bother me, now that you brought it up), that is.

Actually, rounding doesn't bother me at all (or rather, I don't really care if we round or truncate, as long as we're consistent).

It's just that once I s/strtoul/strtod/, and started propagating the "double"s through the code, I found that doing the final calculation and output with "double"s was more natural than the (somewhat hackish, IMHO) permille/percent thing. And that's when I finally came across the fact that "%6.1f" rounds whereas the earlier version truncated.

I thought about it for a second, and figured that rounding was probably what most users expected.

...Johan
-- 
Johan Herland, <johan@herland.net>
www.herland.net
Previous: Junio C HamanoNext: Junio C Hamano
Message 43 of 91 in “BUG? in --dirstat when rearranging lines in a file”
  1. Johan HerlandApr 7, 2011
  2. Linus TorvaldsApr 7, 2011
  3. Junio C HamanoApr 7, 2011
  4. Linus TorvaldsApr 7, 2011
  5. Johan HerlandApr 8, 2011
  6. 1/3 --dirstat: Document shortcomings compared to --stat or regular diffJohan Herland, Apr 8, 2011
  7. Junio C HamanoApr 8, 2011
  8. 2/3 --dirstat-by-file: Make it faster and more correctJohan Herland, Apr 8, 2011
  9. 3/3 Teach --dirstat to not completely ignore rearranged linesJohan Herland, Apr 8, 2011
  10. Linus TorvaldsApr 8, 2011
  11. Junio C HamanoApr 8, 2011
  12. 0/3 --dirstat fixesJohan Herland, Apr 10, 2011
  13. 1/3 --dirstat: Describe non-obvious differences relative to --stat or regular diffJohan Herland, Apr 10, 2011
  14. 2/3 --dirstat-by-file: Make it faster and more correctJohan Herland, Apr 10, 2011
  15. Junio C HamanoApr 11, 2011
  16. 3/3 Teach --dirstat to not completely ignore rearranged lines within a fileJohan Herland, Apr 10, 2011
  17. Junio C HamanoApr 11, 2011
  18. Johan HerlandApr 11, 2011
  19. Junio C HamanoApr 11, 2011
  20. Johan HerlandApr 12, 2011
  21. 4/3 --dirstat: In case of renames, use target filename instead of source filenameJohan Herland, Apr 12, 2011
  22. Linus TorvaldsApr 12, 2011
  23. 5/3 Alternative --dirstat implementation, based on diffstat analysisJohan Herland, Apr 12, 2011
  24. Linus TorvaldsApr 12, 2011
  25. Linus TorvaldsApr 12, 2011
  26. Johan HerlandApr 12, 2011
  27. Linus TorvaldsApr 12, 2011
  28. Junio C HamanoApr 12, 2011
  29. 0/6 --dirstat fixes, part 2Johan Herland, Apr 26, 2011
  30. 1/6 Add several testcases for --dirstat and friendsJohan Herland, Apr 26, 2011
  31. 2/6 Make --dirstat=0 output directories that contribute < 0.1% of changesJohan Herland, Apr 26, 2011
  32. 3/6 Refactor --dirstat parsing; deprecate --cumulative and --dirstat-by-fileJohan Herland, Apr 26, 2011
  33. Junio C HamanoApr 26, 2011
  34. Johan HerlandApr 27, 2011
  35. Junio C HamanoApr 27, 2011
  36. Junio C HamanoApr 27, 2011
  37. Junio C HamanoApr 27, 2011
  38. 4/6 Add config variable for specifying default --dirstat behaviorJohan Herland, Apr 26, 2011
  39. Junio C HamanoApr 26, 2011
  40. Johan HerlandApr 27, 2011
  41. 5/6 Use floating point for --dirstat percentagesJohan Herland, Apr 26, 2011
  42. Junio C HamanoApr 26, 2011
  43. Johan HerlandApr 27, 2011
  44. Junio C HamanoApr 27, 2011
  45. Linus TorvaldsApr 27, 2011
  46. Junio C HamanoApr 27, 2011
  47. 6/6 New --dirstat=lines mode, doing dirstat analysis based on diffstatJohan Herland, Apr 26, 2011
  48. Junio C HamanoApr 26, 2011
  49. Johan HerlandApr 27, 2011
  50. Linus TorvaldsApr 26, 2011
  51. 0/6 --dirstat fixes, part 2Johan Herland, Apr 27, 2011
  52. 1/6 Add several testcases for --dirstat and friendsJohan Herland, Apr 27, 2011
  53. 2/6 Make --dirstat=0 output directories that contribute < 0.1% of changesJohan Herland, Apr 27, 2011
  54. 3/6 Refactor --dirstat parsing; deprecate --cumulative and --dirstat-by-fileJohan Herland, Apr 27, 2011
  55. 4/6 Add config variable for specifying default --dirstat behaviorJohan Herland, Apr 27, 2011
  56. 5/6 Use floating point for --dirstat percentagesJohan Herland, Apr 27, 2011
  57. Linus TorvaldsApr 27, 2011
  58. 6/6 New --dirstat=lines mode, doing dirstat analysis based on diffstatJohan Herland, Apr 27, 2011
  59. 0/6 --dirstat fixes, part 2Johan Herland, Apr 27, 2011
  60. 1/6 Add several testcases for --dirstat and friendsJohan Herland, Apr 27, 2011
  61. 2/6 Make --dirstat=0 output directories that contribute < 0.1% of changesJohan Herland, Apr 27, 2011
  62. 3/6 Refactor --dirstat parsing; deprecate --cumulative and --dirstat-by-fileJohan Herland, Apr 27, 2011
  63. 4/6 Add config variable for specifying default --dirstat behaviorJohan Herland, Apr 27, 2011
  64. 5/6 Allow specifying --dirstat cut-off percentage as a floating point numberJohan Herland, Apr 27, 2011
  65. Linus TorvaldsApr 27, 2011
  66. 5/6 Allow specifying --dirstat cut-off percentage as a floating point numberJohan Herland, Apr 27, 2011
  67. 6/6 New --dirstat=lines mode, doing dirstat analysis based on diffstatJohan Herland, Apr 27, 2011
  68. 0/7 --dirstat fixes, part 2Johan Herland, Apr 28, 2011
  69. 1/7 Add several testcases for --dirstat and friendsJohan Herland, Apr 28, 2011
  70. 2/7 Make --dirstat=0 output directories that contribute < 0.1% of changesJohan Herland, Apr 28, 2011
  71. 3/7 Refactor --dirstat parsing; deprecate --cumulative and --dirstat-by-fileJohan Herland, Apr 28, 2011
  72. 4/7 Add config variable for specifying default --dirstat behaviorJohan Herland, Apr 28, 2011
  73. 5/7 Allow specifying --dirstat cut-off percentage as a floating point numberJohan Herland, Apr 28, 2011
  74. 6/7 New --dirstat=lines mode, doing dirstat analysis based on diffstatJohan Herland, Apr 28, 2011
  75. 7/7 Improve error handling when parsing dirstat parametersJohan Herland, Apr 28, 2011
  76. Junio C HamanoApr 28, 2011
  77. Junio C HamanoApr 28, 2011
  78. Johan HerlandApr 28, 2011
  79. Johan HerlandApr 28, 2011
  80. Junio C HamanoApr 29, 2011
  81. 0/8 --dirstat fixes, part 2Johan Herland, Apr 29, 2011
  82. 1/8 Add several testcases for --dirstat and friendsJohan Herland, Apr 29, 2011
  83. 2/8 Make --dirstat=0 output directories that contribute < 0.1% of changesJohan Herland, Apr 29, 2011
  84. 3/8 Refactor --dirstat parsing; deprecate --cumulative and --dirstat-by-fileJohan Herland, Apr 29, 2011
  85. 4/8 Add config variable for specifying default --dirstat behaviorJohan Herland, Apr 29, 2011
  86. 5/8 Allow specifying --dirstat cut-off percentage as a floating point numberJohan Herland, Apr 29, 2011
  87. 6/8 New --dirstat=lines mode, doing dirstat analysis based on diffstatJohan Herland, Apr 29, 2011
  88. 7/8 Improve error handling when parsing dirstat parametersJohan Herland, Apr 29, 2011
  89. 8/8 Mark dirstat error messages for translationJohan Herland, Apr 29, 2011
  90. Junio C HamanoApr 12, 2011
  91. Linus TorvaldsApr 10, 2011

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