Initial revision
diff --git a/Tools/scripts/ifdef.py b/Tools/scripts/ifdef.py
new file mode 100755
index 0000000..9d74be2
--- /dev/null
+++ b/Tools/scripts/ifdef.py
@@ -0,0 +1,113 @@
+#! /usr/local/bin/python
+
+# Selectively preprocess #ifdef / #ifndef statements.
+# Usage:
+# ifdef [-Dname] ... [-Uname] ... [file] ...
+#
+# This scans the file(s), looking for #ifdef and #ifndef preprocessor
+# commands that test for one of the names mentioned in the -D and -U
+# options. On standard output it writes a copy of the input file(s)
+# minus those code sections that are suppressed by the selected
+# combination of defined/undefined symbols. The #if(n)def/#else/#else
+# lines themselfs (if the #if(n)def tests for one of the mentioned
+# names) are removed as well.
+
+# Features: Arbitrary nesting of recognized and unrecognized
+# preprocesor statements works correctly. Unrecognized #if* commands
+# are left in place, so it will never remove too much, only too
+# little. It does accept whitespace around the '#' character.
+
+# Restrictions: There should be no comments or other symbols on the
+# #if(n)def lines. The effect of #define/#undef commands in the input
+# file or in included files is not taken into account. Tests using
+# #if and the defined() pseudo function are not recognized. The #elif
+# command is not recognized. Improperly nesting is not detected.
+# Lines that look like preprocessor commands but which are actually
+# part of comments or string literals will be mistaken for
+# preprocessor commands.
+
+import sys
+import regex
+import getopt
+import string
+
+defs = []
+undefs = []
+
+def main():
+ opts, args = getopt.getopt(sys.argv[1:], 'D:U:')
+ for o, a in opts:
+ if o == '-D':
+ defs.append(a)
+ if o == '-U':
+ undefs.append(a)
+ if not args:
+ args = ['-']
+ for file in args:
+ if file == '-':
+ process(sys.stdin, sys.stdout)
+ else:
+ f = open(file, 'r')
+ process(f, sys.stdout)
+ f.close()
+
+def process(fpi, fpo):
+ keywords = ('if', 'ifdef', 'ifndef', 'else', 'endif')
+ ok = 1
+ stack = []
+ while 1:
+ line = fpi.readline()
+ if not line: break
+ while line[-2:] == '\\\n':
+ nextline = fpi.readline()
+ if not nextline: break
+ line = line + nextline
+ tmp = string.strip(line)
+ if tmp[:1] != '#':
+ if ok: fpo.write(line)
+ continue
+ tmp = string.strip(tmp[1:])
+ words = string.split(tmp)
+ keyword = words[0]
+ if keyword not in keywords:
+ if ok: fpo.write(line)
+ continue
+ if keyword in ('ifdef', 'ifndef') and len(words) == 2:
+ if keyword == 'ifdef':
+ ko = 1
+ else:
+ ko = 0
+ word = words[1]
+ if word in defs:
+ stack.append(ok, ko, word)
+ if not ko: ok = 0
+ elif word in undefs:
+ stack.append(ok, not ko, word)
+ if ko: ok = 0
+ else:
+ stack.append(ok, -1, word)
+ if ok: fpo.write(line)
+ elif keyword == 'if':
+ stack.append(ok, -1, '')
+ if ok: fpo.write(line)
+ elif keyword == 'else' and stack:
+ s_ok, s_ko, s_word = stack[-1]
+ if s_ko < 0:
+ if ok: fpo.write(line)
+ else:
+ s_ko = not s_ko
+ ok = s_ok
+ if not s_ko: ok = 0
+ stack[-1] = s_ok, s_ko, s_word
+ elif keyword == 'endif' and stack:
+ s_ok, s_ko, s_word = stack[-1]
+ if s_ko < 0:
+ if ok: fpo.write(line)
+ del stack[-1]
+ ok = s_ok
+ else:
+ sys.stderr.write('Unknown keyword %s\n' % keyword)
+ if stack:
+ sys.stderr.write('stack: %s\n' % stack)
+
+main()