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Re: [PATCH v2 11/53] fast-import: convert to struct object_id

From
brian m. carlson <sandals@crustytoothpaste.net>
Date
May 3, 2017, 23:34 UTC
Message-ID
<20170503233404.muovcgxkopot5j7r@genre.crustytoothpaste.net>
In-Reply-To
<20170501222758.fzhrwg4w3p3ayxhg@sigill.intra.peff.net>
On Mon, May 01, 2017 at 06:27:58PM -0400, Jeff King wrote:
Show 12 quoted lines
> If you have 40 hex digits, then you have 20 hex pairs. But delimiting
> them all takes only 19 slashes, since they only go in between pairs[1].
> 
> So the fully expanded formula is:
> 
>   GIT_MAX_HEXSZ +               (1) actual hex bytes
>   (GIT_MAX_HEXSZ / 2) - 1 +     (2) internal slashes between pairs
>   1                             (3) NUL terminator
> 
> which simplifies to 3/2 GIT_MAX_HEXSZ. It may be better to write it out
> (the compiler can simplify) or explain that in the comment, though. It
> took me a minute to figure out that it was correct, too.

I did simplify it like that, but I can improve the comment and the computation, sure. Clearly my comment wasn't good enough to avoid confusion, so I appreciate the feedback. I probably didn't think about because I've touched the notes code recently, where the use of "19" made it more obvious.

-- 
brian m. carlson / brian with sandals: Houston, Texas, US
+1 832 623 2791 | https://www.crustytoothpaste.net/~bmc | My opinion only
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Previous: Jonathan TanNext: brian m. carlson
Message 20 of 69 in “object_id part 8”
  1. 00/53 object_id part 8brian m. carlson, May 1, 2017
  2. 01/53 fetch-pack: convert to struct object_idbrian m. carlson, May 1, 2017
  3. 02/53 Clean up outstanding object_id transforms.brian m. carlson, May 1, 2017
  4. Brandon WilliamsMay 2, 2017
  5. brian m. carlsonMay 3, 2017
  6. 03/53 Convert struct cache_tree to use struct object_idbrian m. carlson, May 1, 2017
  7. Brandon WilliamsMay 2, 2017
  8. brian m. carlsonMay 3, 2017
  9. 05/53 builtin/prune: convert to struct object_idbrian m. carlson, May 1, 2017
  10. 04/53 builtin/name-rev: convert to struct object_idbrian m. carlson, May 1, 2017
  11. 06/53 bundle: convert to struct object_idbrian m. carlson, May 1, 2017
  12. 10/53 fast-import: convert internal structs to struct object_idbrian m. carlson, May 1, 2017
  13. 08/53 builtin/blame: convert static function to struct object_idbrian m. carlson, May 1, 2017
  14. 07/53 branch: convert to struct object_idbrian m. carlson, May 1, 2017
  15. 12/53 submodule: convert merge_submodule to use struct object_idbrian m. carlson, May 1, 2017
  16. 11/53 fast-import: convert to struct object_idbrian m. carlson, May 1, 2017
  17. Jonathan TanMay 1, 2017
  18. Jeff KingMay 1, 2017
  19. Jonathan TanMay 1, 2017
  20. brian m. carlsonMay 3, 2017
  21. 14/53 parse-options-cb: convert to struct object_idbrian m. carlson, May 1, 2017
  22. 13/53 notes-cache: convert to struct object_idbrian m. carlson, May 1, 2017
  23. 16/53 builtin/verify-commit: convert to struct object_idbrian m. carlson, May 1, 2017
  24. 09/53 builtin/rev-parse: convert to struct object_idbrian m. carlson, May 1, 2017
  25. Jonathan TanMay 1, 2017
  26. 15/53 reflog_expire: convert to struct object_idbrian m. carlson, May 1, 2017
  27. 19/53 notes-utils: convert internals to struct object_idbrian m. carlson, May 1, 2017
  28. 21/53 shallow: convert shallow registration functions to object_idbrian m. carlson, May 1, 2017
  29. 24/53 Convert remaining callers of lookup_commit_reference* to object_idbrian m. carlson, May 1, 2017
  30. 22/53 sequencer: convert some functions to struct object_idbrian m. carlson, May 1, 2017
  31. 18/53 http-push: convert some static functions to struct object_idbrian m. carlson, May 1, 2017
  32. 23/53 builtin/tag: convert to struct object_idbrian m. carlson, May 1, 2017
  33. 25/53 Convert lookup_commit* to struct object_idbrian m. carlson, May 1, 2017
  34. 26/53 pack: convert struct pack_idx_entry to struct object_idbrian m. carlson, May 1, 2017
  35. 17/53 tag: convert parse_tag_buffer to struct object_idbrian m. carlson, May 1, 2017
  36. 20/53 revision: convert prepare_show_merge to struct object_idbrian m. carlson, May 1, 2017
  37. 28/53 Convert remaining callers of lookup_blob to object_idbrian m. carlson, May 1, 2017
  38. 30/53 tree: convert read_tree_1 to use struct object_id internallybrian m. carlson, May 1, 2017
  39. 27/53 builtin/unpack-objects: convert to struct object_idbrian m. carlson, May 1, 2017
  40. 29/53 Convert lookup_blob to struct object_idbrian m. carlson, May 1, 2017
  41. 37/53 ref-filter: convert some static functions to struct object_idbrian m. carlson, May 1, 2017
  42. 35/53 Convert the verify_pack callback to struct object_idbrian m. carlson, May 1, 2017
  43. 38/53 refs: convert struct ref_update to use struct object_idbrian m. carlson, May 1, 2017
  44. 36/53 Convert struct ref_array_item to struct object_idbrian m. carlson, May 1, 2017
  45. 40/53 http-push: convert process_ls_object and descendants to object_idbrian m. carlson, May 1, 2017
  46. 39/53 refs/files-backend: convert many internals to struct object_idbrian m. carlson, May 1, 2017
  47. Jonathan TanMay 1, 2017
  48. brian m. carlsonMay 3, 2017
  49. 33/53 log-tree: convert to struct object_idbrian m. carlson, May 1, 2017
  50. 34/53 Convert lookup_tag to struct object_idbrian m. carlson, May 1, 2017
  51. 31/53 builtin/reflog: convert tree_is_complete to take struct object_idbrian m. carlson, May 1, 2017
  52. 41/53 revision: rename add_pending_sha1 to add_pending_oidbrian m. carlson, May 1, 2017
  53. 32/53 Convert lookup_tree to struct object_idbrian m. carlson, May 1, 2017
  54. 42/53 revision: convert remaining parse_object callers to object_idbrian m. carlson, May 1, 2017
  55. 43/53 upload-pack: convert remaining parse_object callers to object_idbrian m. carlson, May 1, 2017
  56. 47/53 sequencer: convert fast_forward_to to struct object_idbrian m. carlson, May 1, 2017
  57. 49/53 builtin/ls-tree: convert to struct object_idbrian m. carlson, May 1, 2017
  58. 51/53 sequencer: convert do_recursive_merge to struct object_idbrian m. carlson, May 1, 2017
  59. 45/53 builtin/read-tree: convert to struct object_idbrian m. carlson, May 1, 2017
  60. 44/53 sha1_name: convert internals of peel_onion to object_idbrian m. carlson, May 1, 2017
  61. 46/53 builtin/ls-files: convert overlay_tree_on_cache to object_idbrian m. carlson, May 1, 2017
  62. 52/53 tree: convert parse_tree_indirect to struct object_idbrian m. carlson, May 1, 2017
  63. 50/53 diff-lib: convert do_diff_cache to struct object_idbrian m. carlson, May 1, 2017
  64. 53/53 object: convert parse_object* to take struct object_idbrian m. carlson, May 1, 2017
  65. Jonathan TanMay 1, 2017
  66. 48/53 merge: convert checkout_fast_forward to struct object_idbrian m. carlson, May 1, 2017
  67. Stefan BellerMay 1, 2017
  68. Brandon WilliamsMay 2, 2017
  69. brian m. carlsonMay 4, 2017

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