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#include <u.h>
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#include <libc.h>
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#include <bio.h>
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#include "dict.h"
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/*
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 * American Heritage Dictionary (encrypted)
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 */
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static Rune intab[256] = {
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	[0x82] L'é',
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	[0x85] L'à',
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	[0x89] L'ë',
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	[0x8a] L'è',
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	[0xa4] L'ñ',
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	[0xf8] L'°',
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	[0xf9] L'·',
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};
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static char	tag[64];
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enum{
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	Run, Openper, Openat, Closeat
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};
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void
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ahdprintentry(Entry e, int cmd)
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{
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	static int inited;
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	long addr;
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	char *p, *t = tag;
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	int obreaklen;
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	int c, state = Run;
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	if(!inited){
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		for(c=0; c<256; c++)
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			if(intab[c] == 0)
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				intab[c] = c;
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		inited = 1;
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	}
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	obreaklen = breaklen;
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	breaklen = 80;
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	addr = e.doff;
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	for(p=e.start; p<e.end; p++){
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		c = intab[(*p ^ (addr++>>1))&0xff];
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		switch(state){
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		case Run:
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			if(c == '%'){
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				t = tag;
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				state = Openper;
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				break;
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			}
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		Putchar:
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			if(c == '\n')
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				outnl(0);
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			else if(c < Runeself)
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				outchar(c);
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			else
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				outrune(c);
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			break;
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		case Openper:
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			if(c == '@')
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				state = Openat;
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			else{
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				outchar('%');
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				state = Run;
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				goto Putchar;
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			}
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			break;
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		case Openat:
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			if(c == '@')
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				state = Closeat;
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			else if(t < &tag[sizeof tag-1])
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				*t++ = c;
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			break;
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		case Closeat:
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			if(c == '%'){
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				*t = 0;
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				switch(cmd){
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				case 'h':
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					if(strcmp("EH", tag) == 0)
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						goto out;
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					break;
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				case 'r':
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					outprint("%%@%s@%%", tag);
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					break;
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				}
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				state = Run;
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			}else{
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				if(t < &tag[sizeof tag-1])
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					*t++ = '@';
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				if(t < &tag[sizeof tag-1])
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					*t++ = c;
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				state = Openat;
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			}
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			break;
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		}
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	}
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out:
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	outnl(0);
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	breaklen = obreaklen;
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}
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long
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ahdnextoff(long fromoff)
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{
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	static char *patterns[] = { "%@NL@%", "%@2@%", 0 };
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	int c, k = 0, state = 0;
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	char *pat = patterns[0];
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	long defoff = -1;
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115 
	if(Bseek(bdict, fromoff, 0) < 0)
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		return -1;
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	while((c = Bgetc(bdict)) >= 0){
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		c ^= (fromoff++>>1)&0xff;
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		if(c != pat[state]){
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			state = 0;
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			continue;
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		}
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		if(pat[++state])
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			continue;
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		if(pat = patterns[++k]){	/* assign = */
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			state = 0;
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			defoff = fromoff-6;
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			continue;
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		}
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		return fromoff-5;
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	}
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	return defoff;
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}
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void
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ahdprintkey(void)
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{
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	Bprint(bout, "No pronunciations.\n");
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}