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Subject: Patch 7.3.1171

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From: Bram Moolenaar <Bram@moolenaar.net>

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------------

Patch 7.3.1171

Problem:    Check for digits and ascii letters can be faster.

Solution:   Use a trick with one comparison. (Dominique Pelle)

Files:	    src/macros.h

*** ../vim-7.3.1170/src/macros.h	2013-06-08 18:19:40.000000000 +0200

--- src/macros.h	2013-06-12 14:03:00.000000000 +0200

***************

*** 109,123 ****

  #else

  # define ASCII_ISALPHA(c) ((c) < 0x7f && isalpha(c))

  # define ASCII_ISALNUM(c) ((c) < 0x7f && isalnum(c))

! # define ASCII_ISLOWER(c) ((c) < 0x7f && islower(c))

! # define ASCII_ISUPPER(c) ((c) < 0x7f && isupper(c))

  #endif

  /* Use our own isdigit() replacement, because on MS-Windows isdigit() returns

   * non-zero for superscript 1.  Also avoids that isdigit() crashes for numbers

!  * below 0 and above 255.  For complicated arguments and in/decrement use

!  * vim_isdigit() instead. */

! #define VIM_ISDIGIT(c) ((c) >= '0' && (c) <= '9')

  /* macro version of chartab().

   * Only works with values 0-255!

--- 109,122 ----

  #else

  # define ASCII_ISALPHA(c) ((c) < 0x7f && isalpha(c))

  # define ASCII_ISALNUM(c) ((c) < 0x7f && isalnum(c))

! # define ASCII_ISLOWER(c) ((unsigned)(c) - 'a' < 26)

! # define ASCII_ISUPPER(c) ((unsigned)(c) - 'A' < 26)

  #endif

  /* Use our own isdigit() replacement, because on MS-Windows isdigit() returns

   * non-zero for superscript 1.  Also avoids that isdigit() crashes for numbers

!  * below 0 and above 255.  */

! #define VIM_ISDIGIT(c) ((unsigned)(c) - '0' < 10)

  /* macro version of chartab().

   * Only works with values 0-255!

*** ../vim-7.3.1170/src/version.c	2013-06-12 13:37:36.000000000 +0200

--- src/version.c	2013-06-12 14:09:00.000000000 +0200

***************

*** 730,731 ****

--- 730,733 ----

  {   /* Add new patch number below this line */

+ /**/

+     1171,

  /**/

-- 

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 /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net   \\\

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