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Re: [PATCH 01/14] Fix non-constant array creation

From
Erik Faye-Lund <kusmabite@googlemail.com>
Date
Aug 21, 2009, 13:41 UTC
Message-ID
<40aa078e0908210641m660b003do6f637535293672ae@mail.gmail.com>
In-Reply-To
<6283b3e1775f43c6fc07e5047f9c99acdc27bc8f.1250860247.git.mstormo@gmail.com>
On Fri, Aug 21, 2009 at 3:30 PM, Marius Storm-Olsen<mstormo@gmail.com> wrote:
Show 6 quoted lines
> @@ -1875,7 +1875,7 @@ static int match_fragment(struct image *img,
>                size_t imgoff = 0;
>                size_t preoff = 0;
>                size_t postlen = postimage->len;
> -               size_t imglen[preimage->nr];
> +               size_t *imglen = xmalloc(sizeof(size_t) * preimage->nr);

How about using alloca instead? It allocates from the stack (just like the C99-style variable-length array you're replacing), and you don't need to free the memory afterwards.

... or is alloca frowned upon? I see it's already used both in compat/regex/regex.c and in compat/nedmalloc/malloc.c, but not apparently not in the git core.

-- 
Erik "kusma" Faye-Lund
kusmabite@gmail.com
(+47) 986 59 656
Previous: Marius Storm-OlsenNext: Marius Storm-Olsen
Message 42 of 49 in “Build git with MSVC”
  1. 00/14 Build git with MSVCMarius Storm-Olsen, Aug 21, 2009
  2. 01/14 Fix non-constant array creationMarius Storm-Olsen, Aug 21, 2009
  3. 02/14 Avoid declaration after statementMarius Storm-Olsen, Aug 21, 2009
  4. 03/14 Define SNPRINTF_SIZE_CORR=1 for Microsoft Visual C++Marius Storm-Olsen, Aug 21, 2009
  5. 04/14 Add define guards to compat/win32.hMarius Storm-Olsen, Aug 21, 2009
  6. 05/14 Change regerror() declaration from K&R style to ANSI C (C89)Marius Storm-Olsen, Aug 21, 2009
  7. 06/14 mingw.c: Use the O_BINARY flag to open filesMarius Storm-Olsen, Aug 21, 2009
  8. 07/14 Fix __stdcall/WINAPI placement and function prototypeMarius Storm-Olsen, Aug 21, 2009
  9. 08/14 Test for WIN32 instead of __MINGW32_Marius Storm-Olsen, Aug 21, 2009
  10. 09/14 Avoid including windows.h in winansi.c for MSVC buildMarius Storm-Olsen, Aug 21, 2009
  11. 10/14 Add empty header files for MSVC portMarius Storm-Olsen, Aug 21, 2009
  12. 11/14 Add MinGW header files to build git with MSVCMarius Storm-Olsen, Aug 21, 2009
  13. 12/14 Add platform files for MSVC portingMarius Storm-Olsen, Aug 21, 2009
  14. 13/14 Add MSVC project filesMarius Storm-Olsen, Aug 21, 2009
  15. 14/14 Add README and gitignore file for MSVC buildMarius Storm-Olsen, Aug 21, 2009
  16. Thiago FarinaAug 23, 2009
  17. Reece DunnAug 23, 2009
  18. Marius Storm-OlsenAug 23, 2009
  19. Thiago FarinaAug 23, 2009
  20. Marius Storm-OlsenAug 24, 2009
  21. Frank LiAug 25, 2009
  22. Thiago FarinaAug 25, 2009
  23. Frank LiAug 27, 2009
  24. Thiago FarinaAug 27, 2009
  25. Erik Faye-LundSep 7, 2009
  26. Junio C HamanoAug 21, 2009
  27. Reece DunnAug 21, 2009
  28. Marius Storm-OlsenAug 22, 2009
  29. Paolo BonziniAug 28, 2009
  30. Johannes SixtAug 21, 2009
  31. Marius Storm-OlsenAug 21, 2009
  32. Frank LiAug 21, 2009
  33. 05/14 Change regerror() definition from K&R style to ANSI C (C89)Marius Storm-Olsen, Aug 21, 2009
  34. Frank LiAug 22, 2009
  35. Erik Faye-LundAug 24, 2009
  36. Junio C HamanoAug 21, 2009
  37. Johan 't HartAug 21, 2009
  38. Johannes SixtAug 21, 2009
  39. Junio C HamanoAug 21, 2009
  40. Marius Storm-OlsenAug 22, 2009
  41. Marius Storm-OlsenAug 22, 2009
  42. Erik Faye-LundAug 21, 2009
  43. Marius Storm-OlsenAug 21, 2009
  44. Janos LaubeAug 21, 2009
  45. Marius Storm-OlsenAug 21, 2009
  46. Johan 't HartAug 21, 2009
  47. Erik Faye-LundAug 22, 2009
  48. Junio C HamanoAug 21, 2009
  49. Junio C HamanoAug 21, 2009

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