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-rw-r--r--compilerplugins/clang/empty.cxx186
-rw-r--r--connectivity/source/drivers/evoab2/NResultSet.cxx4
-rw-r--r--sal/osl/unx/pipe.cxx4
-rw-r--r--sal/osl/unx/security.cxx4
-rw-r--r--sal/osl/unx/socket.cxx4
-rw-r--r--xmloff/qa/unit/uxmloff.cxx2
6 files changed, 195 insertions, 9 deletions
diff --git a/compilerplugins/clang/empty.cxx b/compilerplugins/clang/empty.cxx
new file mode 100644
index 000000000000..74cc7b06e176
--- /dev/null
+++ b/compilerplugins/clang/empty.cxx
@@ -0,0 +1,186 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <cassert>
+
+#include "check.hxx"
+#include "plugin.hxx"
+
+// Warn about checks whether a container is empty done via an (expensive) call to obtain the
+// container's size. For now only handles cases involving strlen.
+
+namespace
+{
+BinaryOperatorKind revert(BinaryOperatorKind op)
+{
+ switch (op)
+ {
+ case BO_LT:
+ return BO_GE;
+ case BO_GT:
+ return BO_LE;
+ case BO_LE:
+ return BO_GT;
+ case BO_GE:
+ return BO_LT;
+ case BO_EQ:
+ case BO_NE:
+ return op;
+ default:
+ assert(false);
+ }
+}
+
+class Empty : public loplugin::FilteringPlugin<Empty>
+{
+public:
+ explicit Empty(loplugin::InstantiationData const& data)
+ : FilteringPlugin(data)
+ {
+ }
+
+ bool VisitBinLT(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+ bool VisitBinGT(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+ bool VisitBinLE(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+ bool VisitBinGE(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+ bool VisitBinEQ(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+ bool VisitBinNE(BinaryOperator const* expr)
+ {
+ visitComparison(expr);
+ return true;
+ }
+
+private:
+ void run() override { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
+
+ void visitComparison(BinaryOperator const* expr, CallExpr const* lhs, Expr const* rhs,
+ BinaryOperatorKind op)
+ {
+ auto const fdecl = lhs->getDirectCallee();
+ if (fdecl == nullptr)
+ {
+ return;
+ }
+ loplugin::DeclCheck dc(fdecl);
+ if (!(dc.Function("strlen").StdNamespace() || dc.Function("strlen").GlobalNamespace()))
+ {
+ return;
+ }
+ APSInt val;
+ if (!rhs->isIntegerConstantExpr(val, compiler.getASTContext()))
+ {
+ return;
+ }
+ switch (op)
+ {
+ case BO_LT:
+ if (val.getExtValue() == 1)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) < 1' with 'e[0] == '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ case BO_GT:
+ if (val.getExtValue() == 0)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) > 0' with 'e[0] != '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ case BO_LE:
+ if (val.getExtValue() == 0)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) <= 0' with 'e[0] == '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ case BO_GE:
+ if (val.getExtValue() == 1)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) >= 1' with 'e[0] != '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ case BO_EQ:
+ if (val.getExtValue() == 0)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) == 0' with 'e[0] == '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ case BO_NE:
+ if (val.getExtValue() == 0)
+ {
+ report(DiagnosticsEngine::Warning,
+ "replace a comparison like 'strlen(e) != 0' with 'e[0] != '\\0''",
+ expr->getExprLoc())
+ << expr->getSourceRange();
+ }
+ break;
+ default:
+ assert(false);
+ }
+ }
+
+ void visitComparison(BinaryOperator const* expr)
+ {
+ if (ignoreLocation(expr))
+ {
+ return;
+ }
+ if (auto const call = dyn_cast<CallExpr>(expr->getLHS()->IgnoreParenImpCasts()))
+ {
+ visitComparison(expr, call, expr->getRHS(), expr->getOpcode());
+ }
+ else if (auto const call = dyn_cast<CallExpr>(expr->getRHS()->IgnoreParenImpCasts()))
+ {
+ visitComparison(expr, call, expr->getLHS(), revert(expr->getOpcode()));
+ }
+ }
+};
+
+loplugin::Plugin::Registration<Empty> X("empty");
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/connectivity/source/drivers/evoab2/NResultSet.cxx b/connectivity/source/drivers/evoab2/NResultSet.cxx
index 5ae85599ecb2..c48073ed2a41 100644
--- a/connectivity/source/drivers/evoab2/NResultSet.cxx
+++ b/connectivity/source/drivers/evoab2/NResultSet.cxx
@@ -157,7 +157,7 @@ static EContactAddress *
getDefaultContactAddress( EContact *pContact,int *value )
{
EContactAddress *ec = static_cast<EContactAddress *>(e_contact_get(pContact,whichAddress(WORK_ADDR_LINE1)));
- if ( ec && (strlen(ec->street)>0) )
+ if ( ec && (ec->street[0]!='\0') )
{
*value= *value +WORK_ADDR_LINE1 -1;
return ec;
@@ -165,7 +165,7 @@ getDefaultContactAddress( EContact *pContact,int *value )
else
{
ec = static_cast<EContactAddress *>(e_contact_get(pContact,whichAddress(HOME_ADDR_LINE1)));
- if ( ec && (strlen(ec->street)>0) )
+ if ( ec && (ec->street[0]!='\0') )
{
*value=*value+HOME_ADDR_LINE1-1;
return ec;
diff --git a/sal/osl/unx/pipe.cxx b/sal/osl/unx/pipe.cxx
index c38ab152dada..10cb87770128 100644
--- a/sal/osl/unx/pipe.cxx
+++ b/sal/osl/unx/pipe.cxx
@@ -392,7 +392,7 @@ void SAL_CALL osl_closePipe(oslPipe pPipe)
SAL_WARN("sal.osl.pipe", "close() failed: " << UnixErrnoString(errno));
/* remove filesystem entry */
- if (strlen(pPipe->m_Name) > 0)
+ if (pPipe->m_Name[0] != '\0')
unlink(pPipe->m_Name);
pPipe->m_bClosed = true;
@@ -407,7 +407,7 @@ oslPipe SAL_CALL osl_acceptPipe(oslPipe pPipe)
if (!pPipe)
return nullptr;
- assert(strlen(pPipe->m_Name) > 0); // you cannot have an empty pipe name
+ assert(pPipe->m_Name[0] != '\0'); // you cannot have an empty pipe name
#if defined(CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT)
pPipe->m_bIsAccepting = true;
diff --git a/sal/osl/unx/security.cxx b/sal/osl/unx/security.cxx
index 29897d8e75de..982b7c940c2f 100644
--- a/sal/osl/unx/security.cxx
+++ b/sal/osl/unx/security.cxx
@@ -320,7 +320,7 @@ static bool osl_psz_getHomeDir(oslSecurity Security, OString* pszDirectory)
pStr = getenv("HOME");
#endif
- if (pStr != nullptr && strlen(pStr) > 0 && access(pStr, 0) == 0)
+ if (pStr != nullptr && pStr[0] != '\0' && access(pStr, 0) == 0)
{
auto const len = std::strlen(pStr);
if (len > sal_uInt32(std::numeric_limits<sal_Int32>::max())) {
@@ -389,7 +389,7 @@ static bool osl_psz_getConfigDir(oslSecurity Security, OString* pszDirectory)
sal_Char *pStr = getenv("XDG_CONFIG_HOME");
- if (pStr == nullptr || strlen(pStr) == 0 || access(pStr, 0) != 0)
+ if (pStr == nullptr || pStr[0] == '\0' || access(pStr, 0) != 0)
{
// a default equal to $HOME/.config should be used.
OString home;
diff --git a/sal/osl/unx/socket.cxx b/sal/osl/unx/socket.cxx
index dd84afc0ccc4..0765daaef2e7 100644
--- a/sal/osl/unx/socket.cxx
+++ b/sal/osl/unx/socket.cxx
@@ -903,7 +903,7 @@ oslSocketResult osl_psz_getLocalHostname (
{
static sal_Char LocalHostname[256] = "";
- if (strlen(LocalHostname) == 0)
+ if (LocalHostname[0] == '\0')
{
#ifdef SYSV
@@ -940,7 +940,7 @@ oslSocketResult osl_psz_getLocalHostname (
}
}
- if (strlen(LocalHostname) > 0)
+ if (LocalHostname[0] != '\0')
{
strncpy(pBuffer, LocalHostname, nBufLen);
pBuffer[nBufLen - 1] = '\0';
diff --git a/xmloff/qa/unit/uxmloff.cxx b/xmloff/qa/unit/uxmloff.cxx
index 4cba6e41fc16..a5e11528fe81 100644
--- a/xmloff/qa/unit/uxmloff.cxx
+++ b/xmloff/qa/unit/uxmloff.cxx
@@ -210,7 +210,7 @@ void Test::testMetaGenerator()
SvXMLMetaDocumentContext::setBuildId(
OUString::createFromAscii(tests[i].generator), xInfoSet);
- if (std::strlen(tests[i].buildId) != 0)
+ if (tests[i].buildId[0] != '\0')
{
CPPUNIT_ASSERT_EQUAL(OUString::createFromAscii(tests[i].buildId),
xInfoSet->getPropertyValue("BuildId").get<OUString>());
generated by cgit (git 2.34.1) at 2025-01-26 22:39:32 +0000