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35 lines
1.1 KiB
Text
35 lines
1.1 KiB
Text
awk ' # range.collapse
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# Input: lines of form: string (tab) ["b"|"e"|"a"] (tab) number
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# Output: lines of form: string (tab) num [(space) num]
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# In sequence of lines with same value of string:
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# b line and following e line are combined into single line:
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# string (tab) num num
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# a line disappears if between paired b and e
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# a line otherwise becomes single line:
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# string (tab) num
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function error(s) {
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print "range.collapse: " s " near pp " rlo "-" rhi | "cat 1>&2"
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}
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function printoldrange() {
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if (range == 1) { error("no %end for " term); rhi = "XXX" }
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if (NR > 1) {
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if (rlo == rhi)
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print term, rlo
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else
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print term, (rlo " " rhi)
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}
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rlo = rhi = $3 # bounds of current range
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}
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BEGIN { FS = OFS = "\t" }
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$1 != term { printoldrange(); term = $1; range = 0 }
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$2 == "e" { if (range == 1) { range = 0; rhi = $3 }
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else { printoldrange(); error("no %begin for " term); rlo = "XXX" }
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next
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}
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$3 <= rhi + 1 { rhi = $3}
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$3 > rhi + 1 { if (range == 0) printoldrange() }
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$2 == "b" { if (range == 1) error("multiple %begin for " term); range = 1 }
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END { if (NR == 1) NR = 2; printoldrange() }
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' $*
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