1 files changed, 66 insertions, 0 deletions
diff --git a/genchartbl.py b/genchartbl.py
new file mode 100755
index 0000000..3529ede
--- /dev/null
+++ b/genchartbl.py
@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+import sys
+import string
+
+def name(i):
+    if i < 0x21:
+        return \
+            ['NUL ', 'SOH ', 'STX ', 'ETX ', 'EOT ', 'ENQ ', 'ACK ', 'BEL ',
+             'BS  ', 'HT  ', 'LF  ', 'VT  ', 'FF  ', 'CR  ', 'SO  ', 'SI  ',
+             'DLE ', 'DC1 ', 'DC2 ', 'DC3 ', 'DC4 ', 'NAK ', 'SYN ', 'ETB ',
+             'CAN ', 'EM  ', 'SUB ', 'ESC ', 'FS  ', 'GS  ', 'RS  ', 'US  ',
+             'SPC '][i]
+    if i == 0x7f:
+        return 'DEL '
+
+def gentbl(tblname, pred):
+    sys.stdout.write('''\
+/* Generated by genchartbl.py */
+static const int {}[] = {{
+'''.format(tblname))
+
+    for i in range(256):
+        if pred(chr(i)):
+            v = 1
+        else:
+            v = 0
+
+        if 0x21 <= i and i < 0x7f:
+            sys.stdout.write('{} /* {}    */, '.format(v, chr(i)))
+        elif 0x80 <= i:
+            sys.stdout.write('{} /* {} */, '.format(v, hex(i)))
+        else:
+            sys.stdout.write('{} /* {} */, '.format(v, name(i)))
+        if (i + 1)%4 == 0:
+            sys.stdout.write('\n')
+
+    sys.stdout.write('};\n')
+
+def sf_key():
+    gentbl('SF_KEY_CHARS', lambda c: c in string.ascii_lowercase or
+           c in string.digits or c in '_-.*')
+
+def sf_dquote():
+    gentbl('SF_DQUOTE_CHARS', lambda c: (0x20 <= ord(c) and ord(c) <= 0x21) or
+           (0x23 <= ord(c) and ord(c) <= 0x5b) or
+           (0x5d <= ord(c) and ord(c) <= 0x7e))
+
+def sf_token():
+    gentbl('SF_TOKEN_CHARS', lambda c: c in "!#$%&'*+-.^_`|~:/" or
+           c in string.digits or c in string.ascii_letters)
+
+def sf_byteseq():
+    gentbl('SF_BYTESEQ_CHARS', lambda c: c in string.ascii_letters or
+           c in string.digits or c in '+/=')
+
+sf_key()
+sys.stdout.write('\n')
+
+sf_dquote()
+sys.stdout.write('\n')
+
+sf_token()
+sys.stdout.write('\n')
+
+sf_byteseq()
+sys.stdout.write('\n')