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sed: deal with peculiar behavior of '2d;2,1p' in GNU sed
function old new delta process_files 2173 2120 -53 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -894,12 +894,13 @@ static void process_files(void)
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|| (!sed_cmd->beg_line && !sed_cmd->end_line
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&& !sed_cmd->beg_match && !sed_cmd->end_match)
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/* Or did we match the start of a numerical range? */
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|| (sed_cmd->beg_line > 0 && (sed_cmd->beg_line == linenum
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/* "shadowed beginning" case: "1d;1,ENDp" - p still matches at line 2
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* even though 1d skipped line 1 which is a start line for p */
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|| (sed_cmd->end_line && sed_cmd->beg_line < linenum && sed_cmd->end_line >= linenum)
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|| (sed_cmd->end_match && sed_cmd->beg_line < linenum)
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)
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|| (sed_cmd->beg_line > 0
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&& (sed_cmd->beg_line == linenum
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/* GNU sed compat:
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* "shadowed beginning" case: "1d;1,ENDp" - p still matches at line 2
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* even though 1d skipped line 1 which is a start line for p */
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|| (sed_cmd->beg_line < linenum && (sed_cmd->end_line > 0 || sed_cmd->end_match))
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)
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)
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/* Or does this line match our begin address regex? */
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|| (beg_match(sed_cmd, pattern_space))
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@ -928,12 +929,10 @@ static void process_files(void)
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&& (regexec(sed_cmd->end_match,
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pattern_space, 0, NULL, 0) == 0)
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);
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if (n && sed_cmd->beg_line > 0) {
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/* Once matched, "n,regex" range is dead, disabling it */
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regfree(sed_cmd->end_match);
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free(sed_cmd->end_match);
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sed_cmd->end_match = NULL;
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}
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}
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if (n && sed_cmd->beg_line > 0) {
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/* once matched, "n,xxx" range is dead, disabling it */
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sed_cmd->beg_line = -2;
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}
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sed_cmd->in_match = !n;
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}
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@ -220,4 +220,9 @@ testing "sed d does not break n,regex matching #2" \
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"second2\nthird2\n" "" \
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"first\nsecond\nthird\nfourth\n""first2\nsecond2\nthird2\nfourth2\n"
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testing "sed 2d;2,1p (gnu compat)" \
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"sed -n '2d;2,1p'" \
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"third\n" "" \
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"first\nsecond\nthird\nfourth\n"
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exit $FAILCOUNT
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