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This software may only be used by you under license from AT&T Corp.
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("AT&T"). A copy of AT&T's Source Code Agreement is available at
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AT&T's Internet website having the URL:
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<http://www.research.att.com/sw/tools/graphviz/license/source.html>
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If you received this software without first entering into a license
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with AT&T, you have an infringing copy of this software and cannot use
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it without violating AT&T's intellectual property rights.
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#define NILgraph NIL(Agraph_t*)
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#define NILnode NIL(Agnode_t*)
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#define NILedge NIL(Agedge_t*)
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#define NILsym NIL(Agsym_t*)
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#define NILstr NIL(char*)
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while (g = agread(stdin,NIL(Agdisc_t*))) {
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agconcat(g,stdin,NIL(Agdisc_t*));
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/*while (n = agfstnode(g)) agdelete(g,n);*/
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for (n = agfstnode(g); n; n = agnxtnode(n))
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for (e = agfstout(n); e; e = agnxtout(e)) {
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fprintf(stderr,"%d %d\n",AGID(agtail(e)),AGID(aghead(e)));
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/*agwrite(g,stdout);*/
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fprintf(stderr,"nodes %d edges %d\n",agnnodes(g), agnedges(g));