#include <u.h>#include <libc.h>#include "pdf.h" /* 7.4.3 ASCII85Decode filter */ static intflreadall(void *aux, Buffer *bi, Buffer *bo){	uchar *in, c[4];	int i, j, insz;	u32int x; 	USED(aux); 	in = bufdata(bi, &insz);	for(i = 0; i < insz;){		if(isws(in[i])){			i++;			continue;		} 		if(in[i] == 'z'){			x = 0;			i++;		}else{			for(x = 0, j = 0; j < 5; j++, i++){				if(in[i] < '!' || in[i] > 'u'){					werrstr("invalid ascii85 char 0x%02x", in[i]);					return -1;				}				x = x*85 + ((i < insz ? in[i] : 'u') - '!');			}		}		c[0] = x >> 24;		c[1] = x >> 16;		c[2] = x >> 8;		c[3] = x;		bufput(bo, c, 4);	}	bi->off = bi->sz; 	return 0;} Filter filterASCII85 = {	.name = "ASCII85Decode",	.readall = flreadall,};