ref: 688c1f15cdaa5fcad19d9fddb30e1c555bfc59e0
dir: /sys/src/cmd/python/Modules/cjkcodecs/alg_jisx0201.h/
#define JISX0201_R_ENCODE(c, assi) \ if ((c) < 0x80 && (c) != 0x5c && (c) != 0x7e) \ (assi) = (c); \ else if ((c) == 0x00a5) (assi) = 0x5c; \ else if ((c) == 0x203e) (assi) = 0x7e; #define JISX0201_K_ENCODE(c, assi) \ if ((c) >= 0xff61 && (c) <= 0xff9f) \ (assi) = (c) - 0xfec0; #define JISX0201_ENCODE(c, assi) \ JISX0201_R_ENCODE(c, assi) \ else JISX0201_K_ENCODE(c, assi) #define JISX0201_R_DECODE(c, assi) \ if ((c) < 0x5c) (assi) = (c); \ else if ((c) == 0x5c) (assi) = 0x00a5; \ else if ((c) < 0x7e) (assi) = (c); \ else if ((c) == 0x7e) (assi) = 0x203e; \ else if ((c) == 0x7f) (assi) = 0x7f; #define JISX0201_K_DECODE(c, assi) \ if ((c) >= 0xa1 && (c) <= 0xdf) \ (assi) = 0xfec0 + (c); #define JISX0201_DECODE(c, assi) \ JISX0201_R_DECODE(c, assi) \ else JISX0201_K_DECODE(c, assi)