1 /* 2 * This code was written by Rich Felker in 2010; no copyright is claimed. 3 * This code is in the public domain. Attribution is appreciated but 4 * unnecessary. 5 */ 6 7 #define bittab __fsmu8 8 9 #include <stdint.h> 10 #include "libc.h" 11 12 extern const uint32_t bittab[] ATTR_LIBC_VISIBILITY; 13 14 /* Upper 6 state bits are a negative integer offset to bound-check next byte */ 15 /* equivalent to: ( (b-0x80) | (b+offset) ) & ~0x3f */ 16 #define OOB(c,b) (((((b)>>3)-0x10)|(((b)>>3)+((int32_t)(c)>>26))) & ~7) 17 18 /* Interval [a,b). Either a must be 80 or b must be c0, lower 3 bits clear. */ 19 #define R(a,b) ((uint32_t)((a==0x80 ? 0x40-b : -a) << 23)) 20 #define FAILSTATE R(0x80,0x80) 21 22 #define SA 0xc2u 23 #define SB 0xf4u 24