From a8af7fec323ca1a7796fc9587796095fe3dcc954 Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Tue, 2 Nov 2010 17:57:08 +0000
Subject: Use table lookup again for HexTable

---
 libX11/src/RdBitF.c       | 55 ++++++++++++++++-------------------------------
 libX11/src/genhextable.py | 39 +++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 36 deletions(-)
 create mode 100644 libX11/src/genhextable.py

(limited to 'libX11')

diff --git a/libX11/src/RdBitF.c b/libX11/src/RdBitF.c
index 07b47494b..e9a509c55 100644
--- a/libX11/src/RdBitF.c
+++ b/libX11/src/RdBitF.c
@@ -54,41 +54,24 @@ from The Open Group.
 #define MAX_SIZE 255
 
 /* shared data for the image read/parse logic */
-/*
-static const short hexTable[256] = {
-    ['0'] = 0,  ['1'] = 1,
-    ['2'] = 2,  ['3'] = 3,
-    ['4'] = 4,  ['5'] = 5,
-    ['6'] = 6,  ['7'] = 7,
-    ['8'] = 8,  ['9'] = 9,
-    ['A'] = 10, ['B'] = 11,
-    ['C'] = 12, ['D'] = 13,
-    ['E'] = 14, ['F'] = 15,
-    ['a'] = 10, ['b'] = 11,
-    ['c'] = 12, ['d'] = 13,
-    ['e'] = 14, ['f'] = 15,
-
-    [' '] = -1, [','] = -1,
-    ['}'] = -1, ['\n'] = -1,
-    ['\t'] = -1
+static const signed char hexTable[256] = {
+    0,  0,  0,  0,  0,  0,  0,  0,  0, -1, -1,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  ,-1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, -1,  0,  0,  0
+  , 0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  0,  0,  0,  0,  0,  0
+  , 0, 10, 11, 12, 13, 14, 15,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0, 10, 11, 12, 13, 14, 15,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0, -1,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
+  , 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0
 };
-*/
-short hexTable(unsigned char Char)
-{
-  if (Char<'0')
-    return -1;
-  if (Char<='9')
-    return Char-'0';
- if (Char<'A')
-    return -1;
-  if (Char<='F')
-    return Char-'A'+10;
- if (Char<'a')
-    return -1;
-  if (Char<='f')
-    return Char-'a'+10;
-  return -1;
-}
 
 /*
  *	read next hex value in the input stream, return -1 if EOF
@@ -114,9 +97,9 @@ NextInt (
 	    /* trim high bits, check type and accumulate */
 	    ch &= 0xff;
 	    if (isascii(ch) && isxdigit(ch)) {
-		value = (value << 4) + hexTable(ch);
+		value = (value << 4) + hexTable[ch];
 		gotone++;
-	    } else if ((hexTable(ch)) < 0 && gotone)
+	    } else if ((hexTable[ch]) < 0 && gotone)
 	      done++;
 	}
     }
diff --git a/libX11/src/genhextable.py b/libX11/src/genhextable.py
new file mode 100644
index 000000000..2a45a9e83
--- /dev/null
+++ b/libX11/src/genhextable.py
@@ -0,0 +1,39 @@
+import sys
+
+HexTable={
+    '0' : 0,  '1' : 1,
+    '2' : 2,  '3' : 3,
+    '4' : 4,  '5' : 5,
+    '6' : 6,  '7' : 7,
+    '8' : 8,  '9' : 9,
+    'A' : 10, 'B' : 11,
+    'C' : 12, 'D' : 13,
+    'E' : 14, 'F' : 15,
+    'a' : 10, 'b' : 11,
+    'c' : 12, 'd' : 13,
+    'e' : 14, 'f' : 15,
+
+    ' ' : -1, ',' : -1,
+    '}' : -1, '\n' : -1,
+    '\t' : -1
+}
+
+OutHexTable=[0]*256
+
+for Char,Val in HexTable.iteritems():
+  OutHexTable[ord(Char)]=Val
+  
+print "static const short hexTable[256] = {"
+i=0
+for Item in OutHexTable:
+  if i==0:
+    PreFix="   "
+  elif i%16 == 0:
+    PreFix="\n  ,"
+  else:
+    PreFix=", "
+  i+=1
+  Val="%d"%Item
+  if len(Val)==1: Val = " "+Val
+  sys.stdout.write("%s%s"%(PreFix,Val))
+print "\n};"  
\ No newline at end of file
-- 
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