checkbufferoverrun: Refactorings
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@ -182,11 +182,8 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
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for (unsigned int i = 0; i < varname.size(); ++i)
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varnames += (i == 0 ? "" : " . ") + varname[i];
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unsigned int varc = varname.size();
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if (varc == 0)
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varc = 1;
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varc = 2 * (varc - 1);
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const unsigned int varc(varname.empty() ? 0 : (varname.size() - 1) * 2);
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if (Token::Match(tok, "return"))
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{
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tok = tok->next();
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@ -584,8 +581,8 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
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if ((varid > 0 && Token::Match(tok, "strcpy|strcat ( %varid% , %str% )", varid)) ||
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(varid == 0 && Token::Match(tok, ("strcpy|strcat ( " + varnames + " , %str% )").c_str())))
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{
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size_t len = Token::getStrLength(tok->tokAt(varc + 4));
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if (len >= static_cast<size_t>(total_size))
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long len = Token::getStrLength(tok->tokAt(varc + 4));
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if (len < 0 || len >= total_size)
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{
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bufferOverrun(tok, varid > 0 ? "" : varnames.c_str());
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continue;
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@ -597,8 +594,8 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
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Token::Match(tok, "read|write ( %any% , %varid% , %num% )", varid) &&
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MathLib::isInt(tok->strAt(6)))
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{
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size_t len = MathLib::toLongNumber(tok->strAt(6));
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if (len > static_cast<size_t>(total_size))
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long len = MathLib::toLongNumber(tok->strAt(6));
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if (len < 0 || len > total_size)
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{
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bufferOverrun(tok);
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continue;
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@ -610,8 +607,8 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
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Token::Match(tok, "fgets ( %varid% , %num% , %any% )", varid) &&
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MathLib::isInt(tok->strAt(4)))
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{
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size_t len = MathLib::toLongNumber(tok->strAt(4));
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if (len > static_cast<size_t>(total_size))
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long len = MathLib::toLongNumber(tok->strAt(4));
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if (len < 0 || len > total_size)
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{
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bufferOverrun(tok);
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continue;
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@ -622,7 +619,7 @@ void CheckBufferOverrun::checkScope(const Token *tok, const std::vector<std::str
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if (varid > 0 && Token::Match(tok, "strncat ( %varid% , %any% , %num% )", varid))
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{
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int n = MathLib::toLongNumber(tok->strAt(6));
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if (n >= total_size)
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if (n < 0 || n >= total_size)
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strncatUsage(tok);
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}
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