discover: Reimplement native-parser as a Bison parser

Occasionally you look at some code and realise that a) this never gets
built, and b) even if it did it would never compile. Today's example is
native-parser.c which we must have just assumed worked for quite a
while.

The native parser has bitrotted entirely and needs to be brought up to
date. While we're here, lets take the chance to implement a proper
grammar for it. This helps us reason more effectively about the parser,
lets us extend it easily in the future, and.. I wanted to write a Bison
parser too.

This implements most of the old functionality, but drops off some
smaller details like settings icons which needs some separate attention
to bring up to date.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/discover/native/Makefile.am b/discover/native/Makefile.am
new file mode 100644
index 0000000..f120e70
--- /dev/null
+++ b/discover/native/Makefile.am
@@ -0,0 +1,54 @@
+#  This program is free software; you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation; version 2 of the License.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+
+noinst_PROGRAMS += discover/native/native-parser.ro
+
+discover_native_native_parser_ro_SOURCES = \
+	discover/native/native.h \
+	discover/native/native.c \
+	discover/native/native-lexer.l \
+	discover/native/native-parser.y
+
+BUILT_SOURCES += \
+	discover/native/native-parser.c \
+	discover/native/native-parser.h \
+	discover/native/native-lexer.h \
+	discover/native/native-lexer.c
+
+CLEANFILES += \
+	discover/native/native-parser.c \
+	discover/native/native-parser.h \
+	discover/native/native-lexer.c \
+	discover/native/native-lexer.h
+
+discover_native_native_parser_ro_CPPFLAGS = \
+	$(AM_CPPFLAGS) \
+	-I$(top_srcdir)/discover/native \
+	-I$(top_builddir)/discover/native
+
+discover_native_native_parser_ro_LINK = \
+	$(LD) -r -o $@
+
+# ylwrap doesn't handle flex header files well; use our own rule here.
+discover/native/native-lexer.h discover/native/native-lexer.c: \
+		$(top_srcdir)/discover/native/native-lexer.l
+	$(AM_V_LEX)$(LEXCOMPILE) --header-file=discover/native/native-lexer.h \
+				       -o discover/native/native-lexer.c $^
+
+# We need to loosen our warnings for the generated lexer code.
+discover/native/%native-lexer.o discover/native/native-lexer.o: \
+		AM_CFLAGS += -Wno-unused-parameter -Wno-missing-prototypes \
+			       -Wno-missing-declarations -Wno-sign-compare
+
+$(discover_native_native_parser_ro_OBJECTS): discover/native/native-parser.h