#include <u.h>#include <libc.h>#include <bio.h>#include "feed.h" #define MIN(a,b) ((a)<(b)?(a):(b))#define MAX(a,b) ((a)>(b)?(a):(b)) #pragma varargck type "ß" char*#pragma varargck type "ś" char* int mainstacksize = 32768;Tzone *tzone; static char *datefmt = "YYYY-MM-DD hh:mm"; static voidprintitem(Biobuf *b, Feed *f, Item *i){	char *s;	int n; 	s = i->author;	if(s == nil){		s = f->editor;		if(s == nil)			s = f->title;	} 	Bprint(b, "\n%τ\t%s\n", tmfmt(&i->published, datefmt), s);	Bprint(b, "    %ß\n", i->title);	if(i->descr)		Bprint(b, "%ś\n", i->descr);	for(n = 0; n < i->nencls; n++)		Bprint(b, "    %s\n", i->encls[n]);	Bprint(b, "→ %s\n", i->link);} static intcmpitem(void *a, void *b){	return tmnorm(&((Item*)a)->published) - tmnorm(&((Item*)b)->published);} static voidfreefeed(Feed *f){	int i; 	free(f->items);	for(i = 0; i < f->nitems; i++)		free(f->items[i].encls);	f->free(f);	free(f);} intsfmt(Fmt *f){	char *s; 	s = va_arg(f->args, char*);	for(; *s; s++){		if(*s == '\n'){			if(s[1] != 0 && s[1] != '\n')				fmtrune(f, ' ');		}else{			fmtrune(f, *s);		}	} 	return 0;} static char *readall(int f){	int bufsz, sz, n;	char *s; 	bufsz = 1023;	s = nil;	for(sz = 0;; sz += n){		if(bufsz-sz < 1024){			bufsz *= 2;			s = realloc(s, bufsz);		}		if((n = readn(f, s+sz, bufsz-sz-1)) < 1)			break;	}	if(n < 0 || sz < 1){		free(s);		return nil;	}	s[sz] = 0; 	return s;} static inthtmlfmt(Fmt *f){	int p[4], pid;	char *s; 	s = va_arg(f->args, char*);	if(s == nil)		return 0; 	pipe(p);	pipe(p+2);	if((pid = rfork(RFPROC|RFFDG)) == 0){		dup(p[0], 0);		dup(p[2], 1);		close(p[0]);		close(p[1]);		close(p[2]);		close(p[3]);		close(2);		execl("/bin/rc", "rc", "-c", "{echo .ll 9999i; echo .pl 1no; echo .po 4; cat | html2ms} | nroff -N", nil);		sysfatal("execl: %r");	}	if(pid < 0)		sysfatal("failed: %r"); 	fprint(p[1], "%s", s);	close(p[0]);	close(p[1]);	close(p[2]);	s = readall(p[3]);	close(p[3]); 	if(s != nil && *s){		s[strlen(s)-1] = 0;		fmtstrcpy(f, s);		free(s);	} 	return 0;} static voidusage(void){	fprint(2, "usage: %s [-d DATEFMT]\n", argv0);	exits("usage");} voidmain(int argc, char **argv){	Biobuf in, out;	Feed *f;	Item *i; 	ARGBEGIN{	case 'd':		datefmt = EARGF(usage());		break;	default:		usage();	}ARGEND 	quotefmtinstall();	tmfmtinstall();	fmtinstall(L'ß', sfmt);	fmtinstall(L'ś', htmlfmt); 	if((tzone = tzload("local")) == nil)		sysfatal("%r"); 	Binit(&in, 0, OREAD);	Binit(&out, 1, OWRITE);	if((f = parserss(&in)) == nil)		sysfatal("%r");	f->ttl = MAX(1, MIN(60, f->ttl)); /* 1..60min */ 	qsort(f->items, f->nitems, sizeof(Item), cmpitem);	for(i = f->items; i != f->items+f->nitems; i++)		printitem(&out, f, i); 	freefeed(f); 	exits(nil);}