[libc-commits] [libc] [libc] add iswblank entrypoint (PR #185272)
via libc-commits
libc-commits at lists.llvm.org
Wed Mar 11 08:50:23 PDT 2026
https://github.com/alowqie updated https://github.com/llvm/llvm-project/pull/185272
>From 69c120ac11d16a3d58244df123a1a8661935355c Mon Sep 17 00:00:00 2001
From: alowqie <25634711+alowqie at users.noreply.github.com>
Date: Sun, 8 Mar 2026 12:25:25 +0100
Subject: [PATCH 1/2] [libc] add iswblank entrypoint
---
libc/config/baremetal/arm/entrypoints.txt | 1 +
libc/config/baremetal/riscv/entrypoints.txt | 1 +
libc/config/darwin/aarch64/entrypoints.txt | 1 +
libc/config/linux/aarch64/entrypoints.txt | 1 +
libc/config/linux/arm/entrypoints.txt | 1 +
libc/config/linux/riscv/entrypoints.txt | 1 +
libc/config/linux/x86_64/entrypoints.txt | 1 +
libc/config/windows/entrypoints.txt | 1 +
libc/include/wctype.yaml | 6 ++++++
libc/src/wctype/CMakeLists.txt | 11 ++++++++++
libc/src/wctype/iswblank.cpp | 21 ++++++++++++++++++
libc/src/wctype/iswblank.h | 21 ++++++++++++++++++
libc/test/src/wctype/CMakeLists.txt | 9 ++++++++
libc/test/src/wctype/iswblank_test.cpp | 24 +++++++++++++++++++++
14 files changed, 100 insertions(+)
create mode 100644 libc/src/wctype/iswblank.cpp
create mode 100644 libc/src/wctype/iswblank.h
create mode 100644 libc/test/src/wctype/iswblank_test.cpp
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index 3731f4341163d..9962cc2c7df41 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -304,6 +304,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
# internal entrypoints
libc.startup.baremetal.init
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 35598afd527e1..c1f9663280e83 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -301,6 +301,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
# internal entrypoints
libc.startup.baremetal.init
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index dccbba529f77e..a6fcf12157f7e 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -107,6 +107,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
)
if(LLVM_LIBC_FULL_BUILD)
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 6d90052164eab..34eff64823f3f 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -374,6 +374,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
# sys/uio.h entrypoints
libc.src.sys.uio.writev
diff --git a/libc/config/linux/arm/entrypoints.txt b/libc/config/linux/arm/entrypoints.txt
index 66634f0e86bb4..b9e679041d2d8 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -199,6 +199,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
)
if(LLVM_LIBC_FULL_BUILD)
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 38f38bd105355..a0a2a486c761f 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -378,6 +378,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
# sys/uio.h entrypoints
libc.src.sys.uio.writev
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 860795dbf77ba..a2454102cb0a1 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -423,6 +423,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
# sys/uio.h entrypoints
libc.src.sys.uio.writev
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index 3a0ee3c5e3e73..d5a33895f1cb2 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -112,6 +112,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswlower
libc.src.wctype.iswspace
+ libc.src.wctype.iswblank
)
set(TARGET_LIBM_ENTRYPOINTS
diff --git a/libc/include/wctype.yaml b/libc/include/wctype.yaml
index c2432e235330f..cbb69b6422e29 100644
--- a/libc/include/wctype.yaml
+++ b/libc/include/wctype.yaml
@@ -32,3 +32,9 @@ functions:
return_type: int
arguments:
- type: wint_t
+ - name: iswblank
+ standards:
+ - stdc
+ return_type: int
+ arguments:
+ - type: wint_t
diff --git a/libc/src/wctype/CMakeLists.txt b/libc/src/wctype/CMakeLists.txt
index f93081f05f85a..e617ed3e2b19c 100644
--- a/libc/src/wctype/CMakeLists.txt
+++ b/libc/src/wctype/CMakeLists.txt
@@ -62,3 +62,14 @@ add_entrypoint_object(
libc.src.__support.wctype_utils
libc.hdr.types.wint_t
)
+
+add_entrypoint_object(
+ iswblank
+ SRCS
+ iswblank.cpp
+ HDRS
+ iswblank.h
+ DEPENDS
+ libc.src.__support.wctype_utils
+ libc.hdr.types.wint_t
+)
diff --git a/libc/src/wctype/iswblank.cpp b/libc/src/wctype/iswblank.cpp
new file mode 100644
index 0000000000000..2c42218e582b9
--- /dev/null
+++ b/libc/src/wctype/iswblank.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of iswblank ----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wctype/iswblank.h"
+#include "src/__support/common.h"
+#include "src/__support/wctype_utils.h"
+
+#include "hdr/types/wint_t.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(int, iswblank, (wint_t c)) {
+ return internal::isblank(static_cast<wchar_t>(c));
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/wctype/iswblank.h b/libc/src/wctype/iswblank.h
new file mode 100644
index 0000000000000..78e7573f5cea6
--- /dev/null
+++ b/libc/src/wctype/iswblank.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for iswblank ----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
+#define LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
+
+#include "hdr/types/wint_t.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+int iswblank(wint_t c);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
diff --git a/libc/test/src/wctype/CMakeLists.txt b/libc/test/src/wctype/CMakeLists.txt
index b7934192e7f82..f580f8201829e 100644
--- a/libc/test/src/wctype/CMakeLists.txt
+++ b/libc/test/src/wctype/CMakeLists.txt
@@ -62,3 +62,12 @@ add_libc_test(
libc.src.wctype.iswspace
)
+add_libc_test(
+ iswblank_test
+ SUITE
+ libc_wctype_unittests
+ SRCS
+ iswblank_test.cpp
+ DEPENDS
+ libc.src.wctype.iswblank
+)
diff --git a/libc/test/src/wctype/iswblank_test.cpp b/libc/test/src/wctype/iswblank_test.cpp
new file mode 100644
index 0000000000000..137f8c218ee1a
--- /dev/null
+++ b/libc/test/src/wctype/iswblank_test.cpp
@@ -0,0 +1,24 @@
+//===-- Unittests for iswblank --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/__support/CPP/span.h"
+#include "src/wctype/iswblank.h"
+
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibciswblank, SimpleTest) {
+ EXPECT_NE(LIBC_NAMESPACE::iswblank(' '), 0);
+ EXPECT_NE(LIBC_NAMESPACE::iswblank('\t'), 0);
+
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('a'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('\n'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('3'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('?'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('\0'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank(-1), 0);
+}
>From ebc4d455efa4b310ce86a615ad718a504b03c55e Mon Sep 17 00:00:00 2001
From: alowqie <areida at pm.me>
Date: Mon, 9 Mar 2026 19:57:16 +0100
Subject: [PATCH 2/2] add missing dependency, remove include
---
libc/src/wctype/CMakeLists.txt | 2 +-
libc/src/wctype/iswblank.cpp | 42 +++++++++++------------
libc/src/wctype/iswblank.h | 42 +++++++++++------------
libc/test/src/wctype/iswblank_test.cpp | 47 +++++++++++++-------------
4 files changed, 66 insertions(+), 67 deletions(-)
diff --git a/libc/src/wctype/CMakeLists.txt b/libc/src/wctype/CMakeLists.txt
index e617ed3e2b19c..f4eeee4729142 100644
--- a/libc/src/wctype/CMakeLists.txt
+++ b/libc/src/wctype/CMakeLists.txt
@@ -26,7 +26,7 @@ add_entrypoint_object(
HDRS
iswdigit.h
DEPENDS
- libc.src.__support.wctype_utils
+ libc.src.__support.wctype_utils
)
add_entrypoint_object(
diff --git a/libc/src/wctype/iswblank.cpp b/libc/src/wctype/iswblank.cpp
index 2c42218e582b9..f1f35743eecb6 100644
--- a/libc/src/wctype/iswblank.cpp
+++ b/libc/src/wctype/iswblank.cpp
@@ -1,21 +1,21 @@
-//===-- Implementation of iswblank ----------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "src/wctype/iswblank.h"
-#include "src/__support/common.h"
-#include "src/__support/wctype_utils.h"
-
-#include "hdr/types/wint_t.h"
-
-namespace LIBC_NAMESPACE_DECL {
-
-LLVM_LIBC_FUNCTION(int, iswblank, (wint_t c)) {
- return internal::isblank(static_cast<wchar_t>(c));
-}
-
-} // namespace LIBC_NAMESPACE_DECL
+//===-- Implementation of iswblank ----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wctype/iswblank.h"
+#include "src/__support/common.h"
+#include "src/__support/wctype_utils.h"
+
+#include "hdr/types/wint_t.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(int, iswblank, (wint_t c)) {
+ return internal::isblank(static_cast<wchar_t>(c));
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/wctype/iswblank.h b/libc/src/wctype/iswblank.h
index 78e7573f5cea6..031568650e700 100644
--- a/libc/src/wctype/iswblank.h
+++ b/libc/src/wctype/iswblank.h
@@ -1,21 +1,21 @@
-//===-- Implementation header for iswblank ----------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
-#define LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
-
-#include "hdr/types/wint_t.h"
-#include "src/__support/common.h"
-
-namespace LIBC_NAMESPACE_DECL {
-
-int iswblank(wint_t c);
-
-} // namespace LIBC_NAMESPACE_DECL
-
-#endif // LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
+//===-- Implementation header for iswblank ----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
+#define LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
+
+#include "hdr/types/wint_t.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+int iswblank(wint_t c);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_WCTYPE_ISWBLANK_H
diff --git a/libc/test/src/wctype/iswblank_test.cpp b/libc/test/src/wctype/iswblank_test.cpp
index 137f8c218ee1a..62df76ed9bb1e 100644
--- a/libc/test/src/wctype/iswblank_test.cpp
+++ b/libc/test/src/wctype/iswblank_test.cpp
@@ -1,24 +1,23 @@
-//===-- Unittests for iswblank --------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "src/__support/CPP/span.h"
-#include "src/wctype/iswblank.h"
-
-#include "test/UnitTest/Test.h"
-
-TEST(LlvmLibciswblank, SimpleTest) {
- EXPECT_NE(LIBC_NAMESPACE::iswblank(' '), 0);
- EXPECT_NE(LIBC_NAMESPACE::iswblank('\t'), 0);
-
- EXPECT_EQ(LIBC_NAMESPACE::iswblank('a'), 0);
- EXPECT_EQ(LIBC_NAMESPACE::iswblank('\n'), 0);
- EXPECT_EQ(LIBC_NAMESPACE::iswblank('3'), 0);
- EXPECT_EQ(LIBC_NAMESPACE::iswblank('?'), 0);
- EXPECT_EQ(LIBC_NAMESPACE::iswblank('\0'), 0);
- EXPECT_EQ(LIBC_NAMESPACE::iswblank(-1), 0);
-}
+//===-- Unittests for iswblank --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/wctype/iswblank.h"
+
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibciswblank, SimpleTest) {
+ EXPECT_NE(LIBC_NAMESPACE::iswblank(' '), 0);
+ EXPECT_NE(LIBC_NAMESPACE::iswblank('\t'), 0);
+
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('a'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('\n'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('3'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('?'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank('\0'), 0);
+ EXPECT_EQ(LIBC_NAMESPACE::iswblank(-1), 0);
+}
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