49 lines
1.3 KiB
Awk
49 lines
1.3 KiB
Awk
# unescape
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# Isolate and unescape the content part of an iCalendar line.
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#
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# @local variables: i, c, c2, res
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# @input str: String
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# @return: Unescaped string
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function unescape(str, i, c, c2, res) {
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for(i=1; i<=length(str);i++) {
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c = substr(str, i, 1)
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if (c != "\\") {
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res = res c
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continue
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}
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i++
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c2 = substr(str, i, 1)
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if (c2 == "n" || c2 == "N") {
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res = res "\n"
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continue
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}
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# Alternatively, c2 is "\\" or "," or ";". In each case, append res with
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# c2. If the strings has been escaped correctly, then the character c2
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# cannot be anything else. To be fail-safe, simply append res with c2.
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res = res c2
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}
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return res
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}
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# getcontent
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# Isolate content part of an iCalendar line, and unescape.
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#
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# @input str: String
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# @return: Unescaped content part
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function getcontent(str) {
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return unescape(substr(str, index(str, ":") + 1))
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}
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# print content of field `field`
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BEGIN { FS = ":"; regex = "^" field; }
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/^BEGIN:(VJOURNAL|VTODO)/ { type = $2 }
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/^END:/ && $2 == type { exit }
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$0 ~ field { line = $0; next; }
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/^ / && line { line = line substr($0, 2); next; }
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/^[^ ]/ && line { exit }
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END {
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if (!type) { exit }
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# Process line
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print getcontent(line)
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}
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