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#include <u.h>
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#include <libc.h>
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#include <bin.h>
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#include <httpd.h>
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/*
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 *  go from http with latin1 escapes to utf,
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 *  we assume that anything >= Runeself is already in utf
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 */
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char *
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httpunesc(HConnect *cc, char *s)
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{
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	char *t, *v;
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	int c;
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	Htmlesc *e;
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	v = halloc(cc, UTFmax*strlen(s) + 1);
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	for(t = v; c = *s;){
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		if(c == '&'){
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			if(s[1] == '#' && s[2] && s[3] && s[4] && s[5] == ';'){
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				c = atoi(s+2);
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				if(c < Runeself){
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					*t++ = c;
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					s += 6;
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					continue;
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				}
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				if(c < 256 && c >= 161){
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					e = &htmlesc[c-161];
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					t += runetochar(t, &e->value);
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					s += 6;
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					continue;
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				}
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			} else {
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				for(e = htmlesc; e->name != nil; e++)
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					if(strncmp(e->name, s, strlen(e->name)) == 0)
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						break;
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				if(e->name != nil){
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					t += runetochar(t, &e->value);
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					s += strlen(e->name);
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					continue;
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				}
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			}
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		}
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		*t++ = c;
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		s++;
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	}
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	*t = 0;
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	return v;
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}