gpxe/src/include/strings.h

   1 #ifndef _STRINGS_H
   2 #define _STRINGS_H
   3
   4 FILE_LICENCE ( GPL2_OR_LATER );
   5
   6 #include <limits.h>
   7 #include <string.h>
   8
   9 static inline __attribute__ (( always_inline )) int
  10 __constant_flsl ( unsigned long x ) {
  11         int r = 0;
  12
  13 #if ULONG_MAX > 0xffffffff
  14         if ( x & 0xffffffff00000000UL ) {
  15                 x >>= 32;
  16                 r += 32;
  17         }
  18 #endif
  19         if ( x & 0xffff0000UL ) {
  20                 x >>= 16;
  21                 r += 16;
  22         }
  23         if ( x & 0xff00 ) {
  24                 x >>= 8;
  25                 r += 8;
  26         }
  27         if ( x & 0xf0 ) {
  28                 x >>= 4;
  29                 r += 4;
  30         }
  31         if ( x & 0xc ) {
  32                 x >>= 2;
  33                 r += 2;
  34         }
  35         if ( x & 0x2 ) {
  36                 x >>= 1;
  37                 r += 1;
  38         }
  39         if ( x & 0x1 ) {
  40                 r += 1;
  41         }
  42         return r;
  43 }
  44
  45 /* We don't actually have these functions yet */
  46 extern int __flsl ( long x );
  47
  48 #define flsl( x ) \
  49         ( __builtin_constant_p ( x ) ? __constant_flsl ( x ) : __flsl ( x ) )
  50
  51 #define fls( x ) flsl ( x )
  52
  53 extern int strcasecmp ( const char *s1, const char *s2 );
  54
  55 static inline __attribute__ (( always_inline )) void
  56 bcopy ( const void *src, void *dest, size_t n ) {
  57         memmove ( dest, src, n );
  58 }
  59
  60 static inline __attribute__ (( always_inline )) void
  61 bzero ( void *s, size_t n ) {
  62         memset ( s, 0, n );
  63 }
  64
  65 #endif /* _STRINGS_H */