add circuitpython code

1 files changed, 73 insertions, 0 deletions

diff --git a/circuitpython/tools/gen_ld_files.py b/circuitpython/tools/gen_ld_files.py
new file mode 100755
index 0000000..28f73d9
--- /dev/null
+++ b/circuitpython/tools/gen_ld_files.py
@@ -0,0 +1,73 @@
+#! /usr/bin/env python3
+
+# SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)
+#
+# SPDX-License-Identifier: MIT
+
+import argparse
+
+import os
+import os.path
+import sys
+import re
+from string import Template
+
+parser = argparse.ArgumentParser(description="Apply #define values to .template.ld file.")
+parser.add_argument(
+    "template_files",
+    metavar="TEMPLATE_FILE",
+    type=argparse.FileType("r"),
+    nargs="+",
+    help="template filename: <something>.template.ld",
+)
+parser.add_argument("--defines", type=argparse.FileType("r"), required=True)
+parser.add_argument("--out_dir", required=True)
+
+args = parser.parse_args()
+
+defines = {}
+
+#
+REMOVE_UL_RE = re.compile("([0-9]+)UL")
+
+
+def remove_UL(s):
+    return REMOVE_UL_RE.sub(r"\1", s)
+
+
+# We skip all lines before
+# // START_LD_DEFINES
+# Then we look for lines like this:
+# /*NAME_OF_VALUE=*/ NAME_OF_VALUE;
+VALUE_LINE_RE = re.compile(r"^/\*\s*(\w+)\s*=\*/\s*(.*);\s*$")
+
+start_processing = False
+for line in args.defines:
+    line = line.strip()
+    if line == "// START_LD_DEFINES":
+        start_processing = True
+        continue
+    if start_processing:
+        match = VALUE_LINE_RE.match(line)
+        if match:
+            name = match.group(1)
+            value = match.group(2).strip()
+            defines[name] = remove_UL(value)
+
+fail = False
+
+for template_file in args.template_files:
+    ld_template_basename = os.path.basename(template_file.name)
+    ld_pathname = os.path.join(args.out_dir, ld_template_basename.replace(".template.ld", ".ld"))
+    with open(ld_pathname, "w") as output:
+        for k, v in defines.items():
+            print("/*", k, "=", v, "*/", file=output)
+        print(file=output)
+        try:
+            output.write(Template(template_file.read()).substitute(defines))
+        except KeyError as e:
+            print("ERROR: {}: No #define for '{}'".format(ld_pathname, e.args[0]), file=sys.stderr)
+            fail = True
+
+if fail:
+    sys.exit(1)