1 files changed, 119 insertions, 0 deletions
diff --git a/.custom-format.py b/.custom-format.py
new file mode 100755
index 00000000..32b8f7c9
--- /dev/null
+++ b/.custom-format.py
@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+
+import subprocess
+import sys
+import os
+import re
+
+# string_re = re.compile('(\\"(\\\\.|[^"\\\\])*\\")') # future use
+
+with open(".clang-format") as f:
+    fmt = f.read()
+
+CLANG_FORMAT_BIN = os.getenv("CLANG_FORMAT_BIN")
+if CLANG_FORMAT_BIN is None:
+    p = subprocess.Popen(["clang-format", "--version"], stdout=subprocess.PIPE)
+    o, _ = p.communicate()
+    o = str(o, "utf-8")
+    o = o[len("clang-format version "):].strip()
+    o = o[:o.find(".")]
+    o = int(o)
+    if o < 7:
+        if subprocess.call(['which', 'clang-format-7'], stdout=subprocess.PIPE) == 0:
+            CLANG_FORMAT_BIN = 'clang-format-7'
+        elif subprocess.call(['which', 'clang-format-8'], stdout=subprocess.PIPE) == 0:
+            CLANG_FORMAT_BIN = 'clang-format-8'
+        elif subprocess.call(['which', 'clang-format-9'], stdout=subprocess.PIPE) == 0:
+            CLANG_FORMAT_BIN = 'clang-format-9'
+        elif subprocess.call(['which', 'clang-format-10'], stdout=subprocess.PIPE) == 0:
+            CLANG_FORMAT_BIN = 'clang-format-10'
+        else:
+            print ("clang-format 7 or above is needed. Aborted.")
+            exit(1)
+    else:
+        CLANG_FORMAT_BIN = 'clang-format'
+            
+COLUMN_LIMIT = 80
+for line in fmt.split("\n"):
+    line = line.split(":")
+    if line[0].strip() == "ColumnLimit":
+        COLUMN_LIMIT = int(line[1].strip())
+
+
+def custom_format(filename):
+    p = subprocess.Popen([CLANG_FORMAT_BIN, filename], stdout=subprocess.PIPE)
+    src, _ = p.communicate()
+    src = str(src, "utf-8")
+
+    macro_indent = 0
+    in_define = False
+    last_line = None
+    out = ""
+    
+    for line in src.split("\n"):
+        if line.startswith("#"):
+            i = macro_indent
+            if line.startswith("#end") and macro_indent > 0:
+                macro_indent -= 1
+                i -= 1
+            elif line.startswith("#el") and macro_indent > 0:
+                i -= 1
+            elif line.startswith("#if") and not (line.startswith("#ifndef") and (line.endswith("_H") or line.endswith("H_"))):
+                macro_indent += 1
+            elif line.startswith("#define"):
+                in_define = True
+            r = "#" + (i * "  ") + line[1:]
+            if i != 0 and line.endswith("\\"):
+                r = r[:-1]
+                while r[-1].isspace() and len(r) != (len(line)-1):
+                    r = r[:-1]
+                r += "\\"
+            if len(r) <= COLUMN_LIMIT:
+                line = r
+        
+        elif "/*" in line and not line.strip().startswith("/*") and line.endswith("*/") and len(line) < (COLUMN_LIMIT-2):
+            cmt_start = line.rfind("/*")
+            line = line[:cmt_start] + " " * (COLUMN_LIMIT-2 - len(line)) + line[cmt_start:]
+
+        define_padding = 0
+        if last_line is not None and in_define and last_line.endswith("\\"):
+            last_line = last_line[:-1]
+            define_padding = max(0, len(last_line[last_line.rfind("\n")+1:]))
+
+        if last_line is not None and last_line.strip().endswith("{") and line.strip() != "":
+            line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
+        elif last_line is not None and last_line.strip().startswith("}") and line.strip() != "":
+            line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
+        elif line.strip().startswith("}") and last_line is not None and last_line.strip() != "":
+            line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
+
+        if not line.endswith("\\"):
+            in_define = False
+
+        out += line + "\n"
+        last_line = line
+
+    return (out)
+
+args = sys.argv[1:]
+if len(args) == 0:
+    print ("Usage: ./format.py [-i] <filename>")
+    print ()
+    print (" The -i option, if specified, let the script to modify in-place")
+    print (" the source files. By default the results are written to stdout.")
+    print()
+    exit(1)
+
+in_place = False
+if args[0] == "-i":
+    in_place = True
+    args = args[1:]
+
+for filename in args:
+    code = custom_format(filename)
+    if in_place:
+        with open(filename, "w") as f:
+            f.write(code)
+    else:
+        print(code)
+