1 #include <u.h> 2 #include <libc.h> 3 #include <bio.h> 4 5 long 6 Bgetrune(Biobufhdr *bp) 7 { 8 int c, i; 9 Rune rune; 10 char str[4]; 11 12 c = Bgetc(bp); 13 if(c < Runeself) { /* one char */ 14 bp->runesize = 1; 15 return c; 16 } 17 str[0] = c; 18 19 for(i=1;;) { 20 c = Bgetc(bp); 21 if(c < 0) 22 return c; 23 str[i++] = c; 24 25 if(fullrune(str, i)) { 26 bp->runesize = chartorune(&rune, str); 27 while(i > bp->runesize) { 28 Bungetc(bp); 29 i--; 30 } 31 return rune; 32 } 33 } 34 } 35 36 int 37 Bungetrune(Biobufhdr *bp) 38 { 39 40 if(bp->state == Bracteof) 41 bp->state = Bractive; 42 if(bp->state != Bractive) 43 return Beof; 44 bp->icount -= bp->runesize; 45 bp->runesize = 0; 46 return 1; 47 } 48