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usr
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graphviz
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gvpr
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//usr/share/graphviz/gvpr/path
/* Report the distance from src = ARGV[0] to dst = ARGV[1] */ BEG_G { int dist[node_t]; node_t n, curn; node_t src = node($G, ARGV[0]); node_t dst = node($G, ARGV[1]); $tvroot = src; $tvtype = TV_bfs; } N { curn = $; if ($ == dst) { printf ("dist from %s to %s is %d\n", src.name, dst.name, dist[dst]); exit(0); } } E { if ($.head == curn) n = $.tail; else n = $.head; if (dist[n] == 0) dist[n] = dist[curn]+1; }
