CString CCString::Print (const CString &sString, DWORD dwFlags) // Print // // Converts an arbitrary string into something that could be parsed as a string // by CodeChain (in particular, it escapes all weird characters). { bool bEscapeNeeded = ((dwFlags & PRFLAG_FORCE_QUOTES) ? true : false); // Short-circuit null strings if (sString.IsBlank()) { if (!(dwFlags & PRFLAG_NO_QUOTES) && !(dwFlags & PRFLAG_ENCODE_FOR_DISPLAY)) return CONSTLIT("\"\""); else return sString; } // Parse char *pPos = sString.GetASCIIZPointer(); char *pPosEnd = pPos + sString.GetLength(); // First see if we need to do anything at all. if (!bEscapeNeeded) { while (pPos < pPosEnd) { if ((BYTE)*pPos <= (BYTE)' ' || *pPos == '(' || *pPos == ')' || *pPos == ';' || *pPos == '\'' || *pPos == '\"' || *pPos == '{' || *pPos == '}' || *pPos == ':' || (*pPos >= '0' && *pPos <= '9')) { bEscapeNeeded = true; break; } pPos++; } } // If we don't need escape or quotes, then we're done if (!bEscapeNeeded) return sString; // Otherwise we need to parse pPos = sString.GetASCIIZPointer(); char *pBuffer = new char [4 * sString.GetLength() + 32]; char *pDest = pBuffer; if (!(dwFlags & PRFLAG_NO_QUOTES) && !(dwFlags & PRFLAG_ENCODE_FOR_DISPLAY)) *pDest++ = '\"'; // If we're encoding for display, we allow tabs and new-lines if (dwFlags & PRFLAG_ENCODE_FOR_DISPLAY) { while (pPos < pPosEnd) { // Ignore zero if (*pPos == '\0') NULL; // Allow tabs and new-lines else if (*pPos == '\t' || *pPos == '\r' || *pPos == '\n') *pDest++ = *pPos; // Convert any low-ASCII characters to whitespace else if ((BYTE)*pPos < ' ' || (BYTE)(*pPos) == 255) *pDest++ = ' '; // Otherwise, take the character unmodified else *pDest++ = *pPos; pPos++; } } // Otherwise we escape every character in a reversable way else { while (pPos < pPosEnd) { if (*pPos == '\\') { *pDest++ = '\\'; *pDest++ = '\\'; } else if (*pPos == '\0') { *pDest++ = '\\'; *pDest++ = '0'; } else if (*pPos == '\"') { *pDest++ = '\\'; *pDest++ = '\"'; } else if (*pPos == '\n') { *pDest++ = '\\'; *pDest++ = 'n'; } else if ((BYTE)*pPos < ' ' || (BYTE)(*pPos) == 255) { *pDest++ = '\\'; *pDest++ = 'x'; *pDest++ = strGetHexDigit(((BYTE)(*pPos) / 16)); *pDest++ = strGetHexDigit(((BYTE)(*pPos) % 16)); } else *pDest++ = *pPos; pPos++; } } if (!(dwFlags & PRFLAG_NO_QUOTES) && !(dwFlags & PRFLAG_ENCODE_FOR_DISPLAY)) *pDest++ = '\"'; *pDest++ = '\0'; // Done CString sResult(pBuffer); delete pBuffer; return sResult; }
ICCItem *CCodeChain::Link (const CString &sString, int iOffset, int *retiLinked, int *ioiCurLine) // Link // // Parses the given string and converts it into a linked // chain of items { char *pStart; char *pPos; ICCItem *pResult = NULL; int iCurLine = (ioiCurLine ? *ioiCurLine : 1); pStart = sString.GetPointer() + iOffset; pPos = pStart; // Skip any whitespace pPos = SkipWhiteSpace(pPos, &iCurLine); // If we've reached the end, then we have // nothing if (*pPos == '\0') pResult = CreateNil(); // If we've got a literal quote, then remember it else if (*pPos == SYMBOL_QUOTE) { int iLinked; pPos++; pResult = Link(sString, iOffset + (pPos - pStart), &iLinked, &iCurLine); if (pResult->IsError()) return pResult; pPos += iLinked; // Make it a literal pResult->SetQuoted(); } // If we've got an open paren then we start a list else if (*pPos == SYMBOL_OPENPAREN) { ICCItem *pNew = CreateLinkedList(); if (pNew->IsError()) return pNew; CCLinkedList *pList = dynamic_cast<CCLinkedList *>(pNew); // Keep reading until we find the end pPos++; // If the list is empty, then there's nothing to do pPos = SkipWhiteSpace(pPos, &iCurLine); if (*pPos == SYMBOL_CLOSEPAREN) { pList->Discard(this); pResult = CreateNil(); pPos++; } // Get all the items in the list else { while (*pPos != SYMBOL_CLOSEPAREN && *pPos != '\0') { ICCItem *pItem; int iLinked; pItem = Link(sString, iOffset + (pPos - pStart), &iLinked, &iCurLine); if (pItem->IsError()) return pItem; // Add the item to the list pList->Append(this, pItem, NULL); pItem->Discard(this); // Move the position pPos += iLinked; // Skip whitespace pPos = SkipWhiteSpace(pPos, &iCurLine); } // If we have a close paren then we're done; Otherwise we've // got an error of some kind if (*pPos == SYMBOL_CLOSEPAREN) { pPos++; pResult = pList; } else { pList->Discard(this); pResult = CreateParseError(iCurLine, CONSTLIT("Mismatched open parenthesis")); } } } // If this is an open brace then we've got a literal structure else if (*pPos == SYMBOL_OPENBRACE) { ICCItem *pNew = CreateSymbolTable(); if (pNew->IsError()) return pNew; CCSymbolTable *pTable = dynamic_cast<CCSymbolTable *>(pNew); // Always literal pTable->SetQuoted(); // Keep reading until we find the end pPos++; // If the list is empty, then there's nothing to do pPos = SkipWhiteSpace(pPos, &iCurLine); if (*pPos == SYMBOL_CLOSEBRACE) { pResult = pTable; pPos++; } // Get all the items in the list else { while (*pPos != SYMBOL_CLOSEBRACE && *pPos != '\0') { // Get the key ICCItem *pKey; int iLinked; pKey = Link(sString, iOffset + (pPos - pStart), &iLinked, &iCurLine); if (pKey->IsError()) { pTable->Discard(this); return pKey; } // Move the position and read a colon pPos += iLinked; pPos = SkipWhiteSpace(pPos, &iCurLine); if (*pPos != SYMBOL_COLON) { pKey->Discard(this); pTable->Discard(this); return CreateParseError(iCurLine, CONSTLIT("Struct value not found.")); } pPos++; // Get the value ICCItem *pValue; pValue = Link(sString, iOffset + (pPos - pStart), &iLinked, &iCurLine); if (pValue->IsError()) { pKey->Discard(this); pTable->Discard(this); return pValue; } // Move the position pPos += iLinked; // Add the item to the table pResult = pTable->AddEntry(this, pKey, pValue); pKey->Discard(this); pValue->Discard(this); if (pResult->IsError()) { pTable->Discard(this); return pResult; } // Skip whitespace because otherwise we won't know whether we // hit the end brace. pPos = SkipWhiteSpace(pPos, &iCurLine); } // If we have a close paren then we're done; Otherwise we've // got an error of some kind if (*pPos == SYMBOL_CLOSEBRACE) { pPos++; pResult = pTable; } else { pTable->Discard(this); pResult = CreateParseError(iCurLine, CONSTLIT("Mismatched open brace")); } } } // If this is an open quote, then read everything until // the close quote else if (*pPos == SYMBOL_OPENQUOTE) { // Parse the string, until the end quote, parsing escape codes char *pStartFragment = NULL; CString sResultString; bool bDone = false; while (!bDone) { pPos++; switch (*pPos) { case SYMBOL_CLOSEQUOTE: case '\0': { if (pStartFragment) { sResultString.Append(CString(pStartFragment, pPos - pStartFragment)); pStartFragment = NULL; } bDone = true; break; } case SYMBOL_BACKSLASH: { if (pStartFragment) { sResultString.Append(CString(pStartFragment, pPos - pStartFragment)); pStartFragment = NULL; } pPos++; if (*pPos == '\0') bDone = true; else if (*pPos == 'n') sResultString.Append(CString("\n", 1)); else if (*pPos == 'r') sResultString.Append(CString("\r", 1)); else if (*pPos == 't') sResultString.Append(CString("\t", 1)); else if (*pPos == '0') sResultString.Append(CString("\0", 1)); else if (*pPos == 'x' || *pPos == 'X') { pPos++; int iFirstDigit = strGetHexDigit(pPos); pPos++; int iSecondDigit = 0; if (*pPos == '\0') bDone = true; else iSecondDigit = strGetHexDigit(pPos); char chChar = (char)(16 * iFirstDigit + iSecondDigit); sResultString.Append(CString(&chChar, 1)); } else sResultString.Append(CString(pPos, 1)); break; } default: { if (pStartFragment == NULL) pStartFragment = pPos; break; } } } // If we found the close, then create a string; otherwise, // it is an error if (*pPos == SYMBOL_CLOSEQUOTE) { pResult = CreateString(sResultString); // Always a literal pResult->SetQuoted(); // Skip past quote pPos++; } else pResult = CreateParseError(iCurLine, CONSTLIT("Mismatched quote")); } // If this is a close paren, then it is an error else if (*pPos == SYMBOL_CLOSEPAREN) pResult = CreateParseError(iCurLine, CONSTLIT("Mismatched close parenthesis")); // If this is a close brace, then it is an error else if (*pPos == SYMBOL_CLOSEBRACE) pResult = CreateParseError(iCurLine, CONSTLIT("Mismatched close brace")); // Colons cannot appear alone else if (*pPos == SYMBOL_COLON) pResult = CreateParseError(iCurLine, CONSTLIT("':' character must appear inside quotes or in a struct definition.")); // Otherwise this is an string of some sort else { char *pStartString; CString sIdentifier; int iInt; bool bNotInteger; pStartString = pPos; // Look for whitespace while (*pPos != '\0' && *pPos != ' ' && *pPos != '\n' && *pPos != '\r' && *pPos != '\t' && *pPos != SYMBOL_OPENPAREN && *pPos != SYMBOL_CLOSEPAREN && *pPos != SYMBOL_OPENQUOTE && *pPos != SYMBOL_CLOSEQUOTE && *pPos != SYMBOL_OPENBRACE && *pPos != SYMBOL_CLOSEBRACE && *pPos != SYMBOL_COLON && *pPos != SYMBOL_QUOTE && *pPos != ';') pPos++; // If we did not advance, then we clearly hit an error if (pStartString == pPos) pResult = CreateParseError(iCurLine, strPatternSubst(CONSTLIT("Unexpected character: %s"), CString(pPos, 1))); // If we ended in a quote then that's a bug else if (*pPos == SYMBOL_QUOTE) pResult = CreateParseError(iCurLine, strPatternSubst(CONSTLIT("Identifiers must not use single quote characters: %s"), strSubString(sString, iOffset + (pStartString - pStart), (pPos + 1 - pStartString)))); // Otherwise, get the identifier else { // Create a string from the portion sIdentifier = strSubString(sString, iOffset + (pStartString - pStart), (pPos - pStartString)); // Check to see if this is a reserved identifier if (strCompareAbsolute(sIdentifier, CONSTLIT("Nil")) == 0) pResult = CreateNil(); else if (strCompareAbsolute(sIdentifier, CONSTLIT("True")) == 0) pResult = CreateTrue(); else { // If this is an integer, create an integer; otherwise // create a string iInt = strToInt(sIdentifier, 0, &bNotInteger); if (bNotInteger) pResult = CreateString(sIdentifier); else pResult = CreateInteger(iInt); } } } // Return the result and the number of characters // that we read if (retiLinked) *retiLinked = (pPos - pStart); if (ioiCurLine) *ioiCurLine = iCurLine; return pResult; }