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Edit File: topon
/* Generate copy of topology of input graph * Replace names with numbers */ BEGIN { int id = 0; char* names[char*]; char* mapn (char* inname) { char* s = names[inname]; if (s == "") { s = id++; names[inname] = s; } return s; } } BEG_G { graph_t g = graph ($.name, "U"); } N { node (g, mapn($.name)); } E { edge (node (g, mapn($.tail.name)), node (g, mapn($.head.name)), ""); } END_G { write (g); }