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[nft,1/3] scanner: Do not convert tabs into spaces

Message ID 20180618082324.7123-2-phil@nwl.cc
State Accepted
Delegated to: Pablo Neira
Headers show
Series libnftables: A few fixes and cleanups | expand

Commit Message

Phil Sutter June 18, 2018, 8:23 a.m. UTC
Commit 2f86dd5a43baf ("erec: Review erec_print()") changed erec_print()
function to expect tabs in input by replacing the whitespace character
in the marker line at the same offset with a tab character so that the
marker aligns with the offending part of input.

The need for that came from JSON input not having its tabs converted to
spaces, which erec_print() didn't expect.

Above change though has a shortcoming: When reading standard syntax
input from a file, Flex code converts tabs into spaces. Location
information is taken from this converted input, but when printing an
error message, the offending input line is read from the input file
directly (which still contains tabs).

The solution is to simply drop said tab conversion from scanner.l.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 src/scanner.l | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)
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Patch

diff --git a/src/scanner.l b/src/scanner.l
index 657fa2daa1f28..ed01b5e7b73e5 100644
--- a/src/scanner.l
+++ b/src/scanner.l
@@ -614,21 +614,7 @@  addrstring	({macaddr}|{ip4addr}|{ip6addr})
 				return NEWLINE;
 			}
 
-{tab}			{
-				/*
-				 * Compensate difference between visible length
-				 * and real length.
-				 */
-				struct parser_state *state = yyget_extra(yyscanner);
-				unsigned int diff;
-
-				diff = TABSIZE - strlen("\t");
-				diff -= (state->indesc->column -
-					 strlen("\t") - 1) % TABSIZE;
-
-				update_pos(state, yylloc, diff);
-			}
-
+{tab}+
 {space}+
 {comment}