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sfeed_content: fix unescaping function - sfeed_curses - sfeed curses UI (now pa… |
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git clone git://git.codemadness.org/sfeed_curses |
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--- |
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commit 3693c4b6d682bb0b888db657dcfc8fb9309acfd9 |
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parent 015b434b8f0345665a9b6920f6dbbd361518904a |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Sat, 6 Mar 2021 11:14:18 +0100 |
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sfeed_content: fix unescaping function |
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A sequence with an escaped \ before another sequence will be incorrectly |
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unescaped. |
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To reproduce it: |
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printf '\t\t\tcontent\\t\\\\n\nabc\tplain\n' | sfeed_content |
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This also slightly improves performance by not using a regex. |
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Diffstat: |
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M sfeed_content | 17 +++++++++++++---- |
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1 file changed, 13 insertions(+), 4 deletions(-) |
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--- |
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diff --git a/sfeed_content b/sfeed_content |
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@@ -7,10 +7,19 @@ |
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awk -F '\t' ' |
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function unescape(s) { |
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- gsub("\\\\t", "\t", s); |
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- gsub("\\\\n", "\n", s); |
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- gsub("\\\\\\\\", "\\", s); |
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- return s; |
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+ for (data = ""; (idx = index(s, "\\")); s = substr(s, idx + 2)) { |
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+ prev = substr(s, 1, idx - 1) |
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+ c = substr(s, idx + 1, 1) |
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+ if (c == "t") |
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+ data = data prev "\t" |
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+ else if (c == "n") |
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+ data = data prev "\n" |
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+ else if (c == "\\") |
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+ data = data prev "\\" |
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+ else |
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+ data = data prev # ignore other. |
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+ } |
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+ return data s # rest |
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} |
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BEGIN { |
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htmlconv = "lynx -stdin -dump " \ |
