genlink: Rewrite genlink script from awk to python

This removes the dependency on awk and should fix #732
python was already a dependency, for the irq generation

3 files changed, 134 insertions, 81 deletions

diff --git a/scripts/genlink.awk b/scripts/genlink.awk
deleted file mode 100644
index 2b7e9d12..00000000
--- a/scripts/genlink.awk
+++ /dev/null
@@ -1,77 +0,0 @@
-# This awk program generates parameters for the linker script generator feature.
-#
-# See ld/README file for more info.
-#
-
-# This file is part of the libopencm3 project.
-# 
-# Copyright (C) 2013 Frantisek Burian <Bufran@seznam.cz>
-# Copyright (C) 2013 Werner Almesberger <wpwrak>
-# 
-# This library is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Lesser General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-# 
-# This library 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 Lesser General Public License for more details.
-# 
-# You should have received a copy of the GNU Lesser General Public License
-# along with this library. If not, see <http://www.gnu.org/licenses/>.
-
-BEGIN {
-	PAT = tolower(PAT);
-	family = PAT;
-}
-!/^#/{
-	#remove cr on windows
-	gsub(/\r$/,"");
-
-	tmp = "^"$1"$";
-	gsub(/\?/, ".", tmp);
-	gsub(/\*/, ".*", tmp);
-	gsub(/\+/, ".+", tmp);
-	tolower(tmp);
-
-	if (PAT ~ tmp) {
-		if ("CPPFLAGS" == MODE)
-			printf "-D%s ",toupper(PAT);
-		if ($2 != "+")
-			PAT=$2;
-                for (i = 3; i <= NF; i = i + 1) {
-			if ($i ~ /^CPU=/) {
-				if ("CPU" == MODE){
-					sub(/[^=]*=/,"",$i);
-					printf "%s",$i;
-					exit;
-				}
-			}
-			else if ($i ~ /^FPU=/) {
-				if ("FPU" == MODE){
-					sub(/[^=]*=/,"",$i);
-					printf "%s",$i;
-					exit;
-				}
-			}
-			else if ($i ~ /[[:upper:]]*=/) {
-				if ("DEFS" == MODE)
-					printf "-D_%s ",$i;
-			}
-		}
-		if (PAT=="END"){
-			if ("FAMILY" == MODE)
-				printf "%s",family;
-			else if ("SUBFAMILY" == MODE)
-				printf "%s",subfamily;
-			exit;
-		}
-		else{
-			subfamily = family;
-			family = PAT;
-	                if("DEFS" == MODE)
-				printf "-D%s ",toupper(PAT);
-		}
-	}
-}
diff --git a/scripts/genlink.py b/scripts/genlink.py
new file mode 100755
index 00000000..96c27e08
--- /dev/null
+++ b/scripts/genlink.py
@@ -0,0 +1,125 @@
+#!/usr/bin/env python
+# This python program generates parameters for the linker script generator feature.
+
+# This file is part of the libopencm3 project.
+#
+# 2017 George-Cristian Jiglau <noonien>
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This library 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 Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library. If not, see <http://www.gnu.org/licenses/>.
+from __future__ import print_function
+import fnmatch
+import sys
+import re
+import os
+
+if len(sys.argv) != 4:
+    print("usage: %s <device-data-file> <device> <mode>" % sys.argv[0], file=sys.stderr)
+    sys.exit(1)
+
+data_file_path = sys.argv[1]
+find = sys.argv[2].lower()
+mode = sys.argv[3].upper()
+
+device = {
+    'info': {},
+    'defs': [],
+    'family': [],
+}
+
+# open device data file
+with open(data_file_path, 'r') as data_file:
+    # iterate lines
+    for line in data_file:
+        # strip whitespace from the beginning and end of line
+        line = line.strip()
+
+        # skip empty lines and comments
+        if line == '' or line.startswith('#'):
+            continue
+
+        # split line into it's parts: <pattern> <parent> <data..>
+        parts = line.split()
+        pattern, parent, data = parts[0], parts[1], parts[2:]
+
+        # skip line if pattern did not match first element
+        if not fnmatch.fnmatch(find, pattern):
+            continue
+
+        # extract data
+        for d in data:
+            # split into K=V
+            try:
+                (k, v) = d.split('=')
+            except:
+                continue
+
+            # skip invalid datas
+            if not re.match('^[A-Z0-9_]+$', k):
+                continue
+
+            # add FPU and CPU to info, not defs
+            if k in ('FPU', 'CPU'):
+                device['info'][k.lower()] = v
+                continue
+
+            device['defs'].append((k, v))
+
+        # if parent is +, there's more data for this pattern
+        if parent == '+':
+            continue
+
+        # device family
+        device['family'].append(find)
+
+        # break if this was the last line in this chain
+        if parent == 'END':
+            break
+
+        # look for the parent
+        find = parent
+
+# reverse device list
+device['family'] = device['family'][::-1]
+
+# device was not found
+if len(device['family']) == 0:
+    sys.exit(1)
+
+# for CPPFLAGS and DEFS, define device family
+if mode in ('CPPFLAGS', 'DEFS'):
+    sys.stdout.write(' '.join('-D%s' % d.upper() for d in device['family']))
+
+# defines
+if mode == 'DEFS':
+    if len(device['defs']) > 0:
+        defs = ' '.join('-D_%s=%s' % d for d in device['defs'])
+        sys.stdout.write(' ' + defs)
+
+# device family
+elif mode == 'FAMILY':
+    if len(device['family']) > 0:
+        sys.stdout.write(device['family'][0])
+
+# device subfamily
+elif mode == 'SUBFAMILY':
+    if len(device['family']) > 1:
+        sys.stdout.write(device['family'][1])
+
+# device info
+else:
+    info = mode.lower()
+    if info in device['info']:
+        sys.stdout.write(device['info'][info])
+
+sys.stdout.flush()
diff --git a/scripts/genlinktest.sh b/scripts/genlinktest.sh
index 148eae16..2c8d4a8b 100755
--- a/scripts/genlinktest.sh
+++ b/scripts/genlinktest.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# This script is intended to test the awk program genlink.awk for the linker 
+# This script is intended to test the python program genlink.py for the linker 
 # script generator feature.
 #
 # See ld/README file for more info.
@@ -25,8 +25,13 @@
 # along with this library. If not, see <http://www.gnu.org/licenses/>.
 
 # run test
-PAAT=`basename $1`;
-gawk -v PAT="$PAAT" -f scripts/genlink.awk $1.data > $1.out;
+DEVICE=`basename $1`;
+(scripts/genlink.py $1.data $DEVICE CPPFLAGS; echo) > $1.out
+(scripts/genlink.py $1.data $DEVICE DEFS; echo) >> $1.out
+(scripts/genlink.py $1.data $DEVICE FAMILY; echo) >> $1.out
+(scripts/genlink.py $1.data $DEVICE SUBFAMILY; echo) >> $1.out
+(scripts/genlink.py $1.data $DEVICE CPU; echo) >> $1.out
+(scripts/genlink.py $1.data $DEVICE FPU; echo) >> $1.out
 
 #check test
 if ! diff -q $1.out $1.result >/dev/null; then
@@ -36,4 +41,4 @@ fi
 #remove workout only if it is OK
 rm -f $1.out
 
-exit 0  
\ No newline at end of file
+exit 0