e32tools/elf2e32/source/h_utl.cpp
author Richard Taylor <richard.i.taylor@nokia.com>
Tue, 06 Apr 2010 10:02:34 +0100
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// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Implementation of the e32 image version for e32 image dump for the elf2e32 tool
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// @internalComponent
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// @released
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// 
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//
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#include <stdlib.h>
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#include <stdio.h>
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#include "h_utl.h"
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/**
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Function to check bracketed hex i.e '{', '}'
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@internalComponent
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@released
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@param aTemp
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@param aBrackets
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@param aDigits
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@param aValue
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@return True if the value passed in is a bracketed hex.
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*/
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TBool IsBracketedHex(const char* aTemp, const char* aBrackets, TInt aDigits, TUint32& aValue)
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{
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	if (aTemp[0]!=aBrackets[0] || aTemp[1+aDigits]!=aBrackets[1])
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		return 0;
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	TInt i;
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	TUint32 x = 0;
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	for (i=1; i<=aDigits; ++i)
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	{
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		TInt c = aTemp[i];
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		if (c>='a' && c<='z') c-=32;
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		if (c<'0' || (c>'9' && c<'A') || c>'F')
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			return 0;
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		c-='0';
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		if (c>9)
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			c-=7;
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		x = (x<<4) | (TUint32)c;
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	}
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	aValue = x;
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	return 1;
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}
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/**
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Function to check the decimal version
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@internalComponent
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@released
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@param aBegin
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Beginning of the version information
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@param aTemp
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@param aValue
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Holds the hexadecimal value
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@return the checked value.
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*/
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TInt CheckForDecimalVersion(const char* aBegin, const char* aTemp, TUint32& aValue)
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{
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	aValue = 0;
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	if (aTemp <= aBegin || *aTemp != '}')
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		return 0;
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	TUint32 v[2] = {0,0};
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	TUint32 m = 1;
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	TInt pos = 0;
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	const char* s0 = aTemp + 1;
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	for (--aTemp; aTemp >= aBegin; --aTemp)
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	{
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		int c = *aTemp;
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		if (c >= '0' && c <= '9')
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		{
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			v[pos] += m * (c - '0');
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			if (v[pos] >= 65536u)
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				return 0;
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			m *= 10;
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		}
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		else if (c == '.')
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		{
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			m = 1;
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			if (++pos >= 2)
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				return 0;
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		}
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		else if (c == '{')
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			break;
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		else
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			return 0;
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	}
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	if (aTemp < aBegin)
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		return 0;
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	aValue = (v[1] << 16) | v[0];
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	return s0 - aTemp;
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}
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/**
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Function to Parse a filename and convert decimal version number to hex
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@internalComponent
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@released
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@param aName
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Filename to be parsed
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@return the converted name wherein the decimal number is converted to hex.
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*/
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char* NormaliseFileName(const char* aName)
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{
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	TFileNameInfo f(aName, 0);
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	TInt nl = f.iBaseLength;
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	TInt el = f.iTotalLength - f.iExtPos;
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	TInt tl = nl + el;
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	if (f.iFlags & EVerPresent)
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		tl += 10;
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	char* t = new char[tl + 1];
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	if (t)
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	{
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		memcpy(t, aName, nl);
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		if (f.iFlags & EVerPresent)
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			sprintf(t + nl, "{%08x}%s", (TInt)f.iModuleVersion, aName + f.iExtPos);
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		else if (el)
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			memcpy(t + nl, aName + f.iExtPos, el);
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		t[tl] = 0;
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	}
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	return t;
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}
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/**
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Constructor for Class TFileNameInfo
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@internalComponent
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@released
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@param aFileName
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Filename to be parsed
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@param aLookForUid
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*/
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TFileNameInfo::TFileNameInfo(const char* aFileName, TBool aLookForUid)
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{
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	iFileName = aFileName;
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	TInt l = strlen(aFileName);
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	iTotalLength = l;
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	TInt remain = l;
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	iFlags = 0;
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	iUid3 = 0;
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	iModuleVersion = 0;
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	iBaseLength = l;
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	iExtPos = l;
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	const char* s = iFileName + l;
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	for (; s>=iFileName && *s!='.' && *s!='}' && (!aLookForUid || *s!=']'); --s)
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	{
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	}
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	if (s<iFileName)
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		return;
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	if (*s == '.')
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	{
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		iExtPos = s - iFileName;
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		if (iExtPos == 0)
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		{
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			iBaseLength = 0;
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			return;
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		}
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		remain = iExtPos;
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		--s;
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	}
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	else if (s != iFileName + l)
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		return;
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	if (aLookForUid && remain>=10 && IsBracketedHex(s-9, "[]", 8, iUid3))
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	{
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		iFlags |= EUidPresent;
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		remain -= 10;
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		s -= 10;
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	}
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	if (remain>=10 && IsBracketedHex(s-9, "{}", 8, iModuleVersion))
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	{
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		iFlags |= EVerPresent;
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		remain -= 10;
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		s -= 10;
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	}
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	else
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	{
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		TInt n = CheckForDecimalVersion(iFileName, s, iModuleVersion);
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		if (n>0)
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		{
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			iFlags |= EVerPresent;
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			remain -= n;
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			s -= n;
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		}
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	}
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	iBaseLength = remain;
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}
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/*-------------------------------------------------------------------------
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String comparison on Linux seems to be a little half-baked.
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-------------------------------------------------------------------------*/
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#ifdef __LINUX__
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int stricmp(const char *a, const char *b)
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	{
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	unsigned char ca,cb;
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	do {
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		ca = *a++;
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		cb = *b++;
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		ca = tolower(ca);
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		cb = tolower(cb);
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	}
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	while((ca == cb) && (ca));
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	return (int) ca-cb;
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	}
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int strnicmp(const char *a, const char *b, int n)
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	{
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	unsigned char ca,cb;
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	int i = 0;
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	do {
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		if (++i > n) return 0;
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		ca = *a++;
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		cb = *b++;
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		ca = tolower(ca);
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		cb = tolower(cb);
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	}
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	while((ca == cb) && (ca));
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	return (int) ca-cb;
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	}
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char* strupr(char *a)
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	{
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		char *ret = a;
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		while (*a)
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			{
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			*a = toupper(*a);
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			a++;
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			}
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		return ret;
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	}
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#endif