From: Andre Noll <maan@tuebingen.mpg.de>
Date: Wed, 12 Jul 2017 09:43:25 +0000 (+0200)
Subject: config_file.l: Instruct flex to create a reentrant scanner.
X-Git-Tag: v1.0.1~1
X-Git-Url: http://git.tuebingen.mpg.de/?a=commitdiff_plain;h=427af673591a006e351dcf76e5957ed67d4e0477;hp=427af673591a006e351dcf76e5957ed67d4e0477;p=lopsub.git

config_file.l: Instruct flex to create a reentrant scanner.

This requires some modifications:

* Most functions take an additional yyscan_t argument.
* We must call yylex_init and yylex_destroy().
* Accessor methods must be used to get yytext and yylen.

We used to set the initial start condition in lls_convert_config(),
before the call to yylex(). For reentrant scanners, however,
the BEGIN macro can not be used in the user code section where
lls_convert_config() is located. But pushing a state works and should
be equivalent.

The generated scanner is not reentrant yet because it still has global
variables. This issue will be addressed in a subsequent patch.
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