#ifndef _DIET_STRING_H_ #define _DIET_STRING_H_ #include /* STRALIGN returns the number of bytes to add to a pointer to make it * point to a (unsigned long)-aligned piece of memory */ #define STRALIGN(x) ((((uintptr_t)x+sizeof(long)-1)&(-sizeof(long)))-(uintptr_t)x) /* MKW returns an unsigned long vector where every byte is x */ #define MKW(x) ((unsigned long)x*0x0101010101010101) /* #if __WORDSIZE == 64 # define MKW(x) (x|x<<8|x<<16|x<<24|x<<32|x<<40|x<<48|x<<56) # define STRALIGN(x) (((unsigned long)x&7)?8-((unsigned long)x&7):0) #else # define MKW(x) (x|x<<8|x<<16|x<<24) # define STRALIGN(x) (((unsigned long)x&3)?4-((unsigned long)x&3):0) #endif */ /* GFC(x) - returns first character */ /* INCSTR(x) - moves to next character */ #if __BYTE_ORDER == __LITTLE_ENDIAN # define GFC(x) ((x)&0xff) # define INCSTR(x) do { x >>= 8; } while (0) #else # define GFC(x) (((x)>>(sizeof(x)*8-8))&0xff) # define INCSTR(x) do { x <<= 8; } while (0) #endif #define UNALIGNED(x,y) (((unsigned long)x & (sizeof (unsigned long)-1)) ^ ((unsigned long)y & (sizeof (unsigned long)-1))) #endif /* _DIET_STRING_H_ */