add NELEMS macro to utils.h

     1.1 diff -r 822d8b2c4639 -r 4e5d95fa96e1 src/utils.h
     1.2 --- a/src/utils.h	Thu Dec 30 00:41:48 2010 +0000
     1.3 +++ b/src/utils.h	Thu Dec 30 00:44:25 2010 +0000
     1.4 @@ -1,5 +1,5 @@
     1.5 -#ifndef _H_UTILS
     1.6 -#define _H_UTILS
     1.7 +#ifndef _UTILS_H
     1.8 +#define _UTILS_H
     1.9  
    1.10  #ifndef NDEBUG
    1.11  /// Log a message to stderr
    1.12 @@ -11,4 +11,7 @@
    1.13  #define LOG_IF(cond, x, ...)
    1.14  #endif
    1.15  
    1.16 +/// Get the number of elements in an array
    1.17 +#define NELEMS(x) (sizeof(x)/sizeof(x[0]))
    1.18 +
    1.19  #endif // _H_UTILS