47 lines
753 B
Awk
47 lines
753 B
Awk
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#! /usr/bin/awk -f
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# Generate topologically sorted list of manual chapters.
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# (C) Copyright 1998, 1999 Free Software Foundation, Inc.
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# Written by Ulrich Drepper <drepper@cygnus.com>, 1998.
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BEGIN {
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cnt = 0
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dnt = 0
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}
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{
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to[dnt] = $1
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from[dnt] = $2
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++dnt
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all[cnt++] = $1
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}
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END {
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do {
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moved = 0
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for (i = 0; i < dnt; ++i) {
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for (j = 0; j < cnt; ++j) {
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if (all[j] == from[i]) {
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for (k = j + 1; k < cnt; ++k) {
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if (all[k] == to[i]) {
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break;
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}
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}
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if (k < cnt) {
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for (l = k - 1; l >= j; --l) {
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all[l + 1] = all[l]
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}
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all[j] = to[i]
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break;
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}
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}
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}
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if (j < cnt) {
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moved = 1
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break
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}
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}
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} while (moved)
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for (i = 0; i < cnt; ++i) {
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print all[i];
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}
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}
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