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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
/*****************************************************************************
*
* $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtSubst.cpp
*
***/
#include "../Pch.h"
#pragma hdrstop
#define SUBST_BLOCK SubstParsedData<chartype>::SubstBlock<chartype>
/*****************************************************************************
*
* Internal functions
*
***/
//============================================================================
template <typename chartype>
bool IVarSubstitute (
ARRAY(chartype) * dst,
const chartype src[],
unsigned varCount,
const chartype * varNames[], // [varCount]
const chartype * varValues[] // [varCount]
) {
ASSERT(dst);
ASSERT(src);
ASSERT(varNames);
ASSERT(varValues);
dst->Reserve(StrLen(src) * 5/4);
bool result = true;
while (*src) {
// Copy non-substituted strings and escape %% symbols
if ((*src != L'%') || (*++src == L'%')) {
dst->Push(*src++);
continue;
}
// Find variable definition
const chartype * varStart = src;
const chartype * varEnd = StrChr(varStart, L'%');
if (!varEnd) {
// Skip % character and continue
result = false;
continue;
}
// Validate variable name length
chartype varBuffer[256];
if (varEnd - varStart >= arrsize(varBuffer)) {
result = false;
src = varEnd + 1;
continue;
}
// Copy variable name excluding trailing '%'
StrCopy(varBuffer, varStart, varEnd - varStart + 1);
src = varEnd + 1;
// Find the variable value and perform substitution
bool found = false;
for (unsigned i = 0; i < varCount; ++i) {
if (StrCmp(varBuffer, varNames[i]))
continue;
dst->Add(varValues[i], StrLen(varValues[i]));
found = true;
break;
}
// Check that variable definition exists
result = result && found;
}
// Terminate string
dst->Push(0);
return result;
}
//============================================================================
template <typename chartype>
bool IParseForSubst (
SubstParsedData<chartype> * dest,
const chartype src[]
) {
const chartype * current = src;
bool result = true;
while (*current) {
// Copy non-substituted strings and escape %% symbols
if ((*current != L'%') || (*++current == L'%')) {
current++;
continue;
}
// Find variable definition
const chartype * varStart = current;
const chartype * varEnd = StrChr(varStart, L'%');
if (!varEnd) {
// Skip % character and continue
result = false;
continue;
}
// We've found a variable, copy the current data to a new object
if (current != src) {
int strLen = (current - src) - 1;
SUBST_BLOCK * block = NEW(SUBST_BLOCK);
block->isVar = false;
block->strLen = strLen;
block->data = (chartype*)ALLOCZERO((strLen + 1) * sizeof(chartype));
MemCopy(block->data, src, strLen * sizeof(chartype));
dest->blocks.Add(block);
}
// Validate variable name length
chartype varBuffer[256];
if (varEnd - varStart >= arrsize(varBuffer)) {
result = false;
src = current = varEnd + 1;
continue;
}
// Copy variable name excluding trailing '%'
int strLen = (varEnd - varStart);
SUBST_BLOCK * block = NEW(SUBST_BLOCK);
block->isVar = true;
block->strLen = strLen;
block->data = (chartype*)ALLOCZERO((strLen + 1) * sizeof(chartype));
MemCopy(block->data, varStart, strLen * sizeof(chartype));
dest->blocks.Add(block);
src = current = varEnd + 1;
}
// Check and see if there's any data remaining
if (current != src) {
int strLen = (current - src);
SUBST_BLOCK * block = NEW(SUBST_BLOCK);
block->isVar = false;
block->strLen = strLen;
block->data = (chartype*)ALLOCZERO((strLen + 1) * sizeof(chartype));
MemCopy(block->data, src, strLen * sizeof(chartype));
dest->blocks.Add(block);
}
return result;
}
//============================================================================
template <typename chartype>
bool IVarSubstPreParsed (
ARRAY(chartype) * dst,
const SubstParsedData<chartype> * src,
unsigned varCount,
const chartype * varNames[], // [varCount]
const chartype * varValues[] // [varCount]
) {
unsigned approxTotalSize = 0;
for (unsigned i = 0; i < src->blocks.Count(); ++i) {
approxTotalSize += src->blocks[i]->strLen;
}
dst->Reserve(approxTotalSize * 5/4);
bool foundAll = true;
for (unsigned blockIndex = 0; blockIndex < src->blocks.Count(); ++blockIndex) {
SUBST_BLOCK * block = src->blocks[blockIndex];
if (block->isVar) {
bool found = false;
for (unsigned varIndex = 0; varIndex < varCount; ++varIndex) {
if (StrCmp(block->data, varNames[varIndex])) {
continue;
}
dst->Add(varValues[varIndex], StrLen(varValues[varIndex]));
found = true;
break;
}
foundAll &= found;
}
else {
dst->Add(block->data, block->strLen);
}
}
dst->Push(0);
return foundAll;
}
/*****************************************************************************
*
* Exports
*
***/
//============================================================================
bool ParseForSubst (
SubstParsedData<wchar> * dest,
const wchar src[]
) {
return IParseForSubst(dest, src);
}
//============================================================================
bool ParseForSubst (
SubstParsedData<char> * dest,
const char src[]
) {
return IParseForSubst(dest, src);
}
//============================================================================
bool VarSubstitute (
ARRAY(wchar) * dst,
const wchar src[],
unsigned varCount,
const wchar * varNames[], // [varCount]
const wchar * varValues[] // [varCount]
) {
return IVarSubstitute(dst, src, varCount, varNames, varValues);
}
//============================================================================
bool VarSubstitute (
ARRAY(char) * dst,
const char src[],
unsigned varCount,
const char * varNames[], // [varCount]
const char * varValues[] // [varCount]
) {
return IVarSubstitute(dst, src, varCount, varNames, varValues);
}
//============================================================================
bool VarSubstitute (
ARRAY(wchar) * dst,
const SubstParsedData<wchar> * src,
unsigned varCount,
const wchar * varNames[], // [varCount]
const wchar * varValues[] // [varCount]
) {
return IVarSubstPreParsed(dst, src, varCount, varNames, varValues);
}
//============================================================================
bool VarSubstitute (
ARRAY(char) * dst,
const SubstParsedData<char> * src,
unsigned varCount,
const char * varNames[], // [varCount]
const char * varValues[] // [varCount]
) {
return IVarSubstPreParsed(dst, src, varCount, varNames, varValues);
}