From 23ea7ecbcc7687cb3814bf38e6be80fd4b4a4d7a Mon Sep 17 00:00:00 2001
From: Andrey Akhmichin <sepulkarium45@yahoo.com>
Date: Thu, 3 Sep 2020 20:58:57 +0500
Subject: [PATCH] public: optimize MD5_Print function.

---
 public/crclib.c |  6 +-----
 public/crtlib.c | 28 ++++++++++++++++++++++++++++
 public/crtlib.h |  2 ++
 3 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/public/crclib.c b/public/crclib.c
index 9dbae361..e31beb8d 100644
--- a/public/crclib.c
+++ b/public/crclib.c
@@ -438,16 +438,12 @@ transform hash to hexadecimal printable symbols
 char *MD5_Print( byte hash[16] )
 {
 	static char	szReturn[64];
-	char		szChunk[10];
 	int		i;
 
 	memset( szReturn, 0, 64 );
 
 	for( i = 0; i < 16; i++ )
-	{
-		Q_snprintf( szChunk, sizeof( szChunk ), "%02X", hash[i] );
-		Q_strncat( szReturn, szChunk, sizeof( szReturn ));
-	}
+		COM_Hex2String( hash[i], &szReturn[i * 2] );
 
 	return szReturn;
 }
diff --git a/public/crtlib.c b/public/crtlib.c
index bd67d490..27d8d81d 100644
--- a/public/crtlib.c
+++ b/public/crtlib.c
@@ -918,6 +918,33 @@ void COM_PathSlashFix( char *path )
 		Q_strcpy( &path[len], "/" );
 }
 
+/*
+============
+COM_Hex2Char
+============
+*/
+char COM_Hex2Char( uint8_t hex )
+{
+	if( hex >= 0x0 && hex <= 0x9 )
+		hex += '0';
+	else if( hex >= 0xA && hex <= 0xF )
+		hex += '7';
+
+	return (char)hex;
+}
+
+/*
+============
+COM_Hex2String
+============
+*/
+void COM_Hex2String( uint8_t hex, char *str )
+{
+	*str++ = COM_Hex2Char( hex >> 4 );
+	*str++ = COM_Hex2Char( hex & 0x0F );
+	*str = '\0';
+}
+
 int matchpattern( const char *in, const char *pattern, qboolean caseinsensitive )
 {
 	return matchpattern_with_separator( in, pattern, caseinsensitive, "/\\:", false );
@@ -983,3 +1010,4 @@ int matchpattern_with_separator( const char *in, const char *pattern, qboolean c
 		return 0; // reached end of pattern but not end of input
 	return 1; // success
 }
+
diff --git a/public/crtlib.h b/public/crtlib.h
index d5c71f21..f64db6f2 100644
--- a/public/crtlib.h
+++ b/public/crtlib.h
@@ -84,6 +84,8 @@ const char *COM_FileWithoutPath( const char *in );
 void COM_StripExtension( char *path );
 void COM_RemoveLineFeed( char *str );
 void COM_PathSlashFix( char *path );
+char COM_Hex2Char( uint8_t hex );
+void COM_Hex2String( uint8_t hex, char *str );
 #define COM_CheckString( string ) ( ( !string || !*string ) ? 0 : 1 )
 int matchpattern( const char *in, const char *pattern, qboolean caseinsensitive );
 int matchpattern_with_separator( const char *in, const char *pattern, qboolean caseinsensitive, const char *separators, qboolean wildcard_least_one );