From 926903905bcf5d1de0ef528718fddbf527fc19de Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Sun, 2 Sep 2012 09:04:11 +0000
Subject: Added a CreateHexDump() function for easier raw data debugging

git-svn-id: http://mc-server.googlecode.com/svn/trunk@818 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 source/StringUtils.cpp | 58 +++++++++++++++++++++++++++++++++++++++++++++++++-
 source/StringUtils.h   |  2 ++
 2 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/source/StringUtils.cpp b/source/StringUtils.cpp
index 2ec68550b..b651cc6b9 100644
--- a/source/StringUtils.cpp
+++ b/source/StringUtils.cpp
@@ -464,4 +464,60 @@ AString & UTF8ToRawBEUTF16(const char * a_UTF8, size_t a_UTF8Length, AString & a
         } while (tmpBytesToRead > 0);
     }
 
-   --------------------------------------------------------------------- */
\ No newline at end of file
+   --------------------------------------------------------------------- */
+   
+
+
+
+
+/*
+format binary data this way:
+00001234: 31 32 33 34 35 36 37 38 39 30 61 62 63 64 65 66    1234567890abcdef
+*/
+#define HEX(x) ((x) > 9 ? (x) + 'A' - 10 : (x) + '0')
+
+AString & CreateHexDump(AString & a_Out, const void * a_Data, int a_Size, int a_LineLength)
+{
+	ASSERT(a_LineLength <= 120);  // Due to using a fixed size line buffer; increase line[]'s size to lift this max
+	char line[512];
+	char * p;
+	char * q;
+	
+	a_Out.reserve(a_Size / a_LineLength * (18 + 6 * a_LineLength));
+	for (int i = 0; i < a_Size; i += a_LineLength)
+	{
+		int k = a_Size - i;
+		if (k > a_LineLength)
+		{
+			k = a_LineLength;
+		}
+		memset(line, ' ', sizeof(line));        
+		line[sprintf(line, "%08x:", i)] = 32;  // Remove the terminating NULL that sprintf puts there
+		p = line + 10;
+		q = p + 2 + a_LineLength * 3 + 1;
+		for (int j = 0; j < k; j++)
+		{
+			unsigned char c = ((unsigned char *)a_Data)[i + j];
+			p[0] = HEX(c >> 4);
+			p[1] = HEX(c & 0xf);
+			if (c >= ' ')
+			{
+				q[0] = (char)c;
+			}
+			else
+			{
+				q[0] = '.';
+			}
+			p += 3;
+			q ++;
+		}  // for j
+		q[0] = '\n';
+		q[1] = 0;
+		a_Out.append(line);
+	}  // for i
+	return a_Out;
+}
+
+
+
+
diff --git a/source/StringUtils.h b/source/StringUtils.h
index 9dcb456c6..908c725ab 100644
--- a/source/StringUtils.h
+++ b/source/StringUtils.h
@@ -57,6 +57,8 @@ extern AString & RawBEToUTF8(short * a_RawData, int a_NumShorts, AString & a_UTF
 /// Converts a UTF-8 string into a UTF-16 BE string, packing that back into AString; return a ref to a_UTF16
 extern AString & UTF8ToRawBEUTF16(const char * a_UTF8, size_t a_UTF8Length, AString & a_UTF16);
 
+/// Creates a nicely formatted HEX dump of the given memory block. Max a_BytesPerLine is 120
+extern AString & CreateHexDump(AString & a_Out, const void * a_Data, int a_Size, int a_BytesPerLine);
 
 
 // If you have any other string helper functions, declare them here
-- 
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