[libc-commits] [libc] [libc] Implement iswprint entrypoint (PR #185251)
via libc-commits
libc-commits at lists.llvm.org
Fri Mar 13 00:48:11 PDT 2026
https://github.com/neonetizen updated https://github.com/llvm/llvm-project/pull/185251
>From fb9f3fafd8fe372fe1a84d2b6d3e42dca5eef62f Mon Sep 17 00:00:00 2001
From: neonetizen <justin.pelak7 at gmail.com>
Date: Sat, 7 Mar 2026 21:31:18 -0800
Subject: [PATCH] [libc] Implement iswprint 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 | 7 +++++++
libc/src/wctype/CMakeLists.txt | 10 ++++++++++
libc/src/wctype/iswprint.cpp | 21 ++++++++++++++++++++
libc/src/wctype/iswprint.h | 21 ++++++++++++++++++++
libc/test/src/wctype/CMakeLists.txt | 10 ++++++++++
libc/test/src/wctype/iswprint_test.cpp | 22 +++++++++++++++++++++
14 files changed, 99 insertions(+)
create mode 100644 libc/src/wctype/iswprint.cpp
create mode 100644 libc/src/wctype/iswprint.h
create mode 100644 libc/test/src/wctype/iswprint_test.cpp
diff --git a/libc/config/baremetal/arm/entrypoints.txt b/libc/config/baremetal/arm/entrypoints.txt
index c61afd0fdcc62..f3c3cf62ae923 100644
--- a/libc/config/baremetal/arm/entrypoints.txt
+++ b/libc/config/baremetal/arm/entrypoints.txt
@@ -302,6 +302,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
# internal entrypoints
libc.startup.baremetal.init
diff --git a/libc/config/baremetal/riscv/entrypoints.txt b/libc/config/baremetal/riscv/entrypoints.txt
index 24e9cc502b731..888f31af15d53 100644
--- a/libc/config/baremetal/riscv/entrypoints.txt
+++ b/libc/config/baremetal/riscv/entrypoints.txt
@@ -299,6 +299,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
# internal entrypoints
libc.startup.baremetal.init
diff --git a/libc/config/darwin/aarch64/entrypoints.txt b/libc/config/darwin/aarch64/entrypoints.txt
index 5085e95a643ec..c50a5625424c1 100644
--- a/libc/config/darwin/aarch64/entrypoints.txt
+++ b/libc/config/darwin/aarch64/entrypoints.txt
@@ -105,6 +105,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
)
if(LLVM_LIBC_FULL_BUILD)
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 7957847200960..59770d9d3b180 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -372,6 +372,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
# 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 48d5972f71ce0..8d9f6c1858dbe 100644
--- a/libc/config/linux/arm/entrypoints.txt
+++ b/libc/config/linux/arm/entrypoints.txt
@@ -197,6 +197,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
)
if(LLVM_LIBC_FULL_BUILD)
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 7ebaa4f165c0d..9fe3e69acae15 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -376,6 +376,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
# 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 4cec9708b0403..3cc559557e099 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -421,6 +421,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswcntrl
libc.src.wctype.iswdigit
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
# sys/uio.h entrypoints
libc.src.sys.uio.writev
diff --git a/libc/config/windows/entrypoints.txt b/libc/config/windows/entrypoints.txt
index 18910b5f98459..aacf0f625b4dd 100644
--- a/libc/config/windows/entrypoints.txt
+++ b/libc/config/windows/entrypoints.txt
@@ -110,6 +110,7 @@ set(TARGET_LIBC_ENTRYPOINTS
libc.src.wctype.iswalpha
libc.src.wctype.iswcntrl
libc.src.wctype.iswlower
+ libc.src.wctype.iswprint
)
set(TARGET_LIBM_ENTRYPOINTS
diff --git a/libc/include/wctype.yaml b/libc/include/wctype.yaml
index 9a12f59c3243a..e06df68f81ace 100644
--- a/libc/include/wctype.yaml
+++ b/libc/include/wctype.yaml
@@ -20,3 +20,10 @@ functions:
return_type: int
arguments:
- type: wint_t
+ - name: iswprint
+ standards:
+ - stdc
+ return_type: int
+ arguments:
+ - type: wint_t
+
\ No newline at end of file
diff --git a/libc/src/wctype/CMakeLists.txt b/libc/src/wctype/CMakeLists.txt
index c7c65ca43b48e..a50a58c25541f 100644
--- a/libc/src/wctype/CMakeLists.txt
+++ b/libc/src/wctype/CMakeLists.txt
@@ -39,3 +39,13 @@ add_entrypoint_object(
libc.src.__support.wctype_utils
libc.hdr.types.wint_t
)
+
+add_entrypoint_object(
+ iswprint
+ SRCS
+ iswprint.cpp
+ HDRS
+ iswprint.h
+ DEPENDS
+ libc.src.__support.wctype_utils
+)
diff --git a/libc/src/wctype/iswprint.cpp b/libc/src/wctype/iswprint.cpp
new file mode 100644
index 0000000000000..b291a52054e1f
--- /dev/null
+++ b/libc/src/wctype/iswprint.cpp
@@ -0,0 +1,21 @@
+//===-- Implementation of iswprint ----------------------------------------===//
+//
+// 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/iswprint.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, iswprint, (wint_t c)) {
+ return internal::isprint(static_cast<wchar_t>(c));
+}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/wctype/iswprint.h b/libc/src/wctype/iswprint.h
new file mode 100644
index 0000000000000..e848bcca2acc4
--- /dev/null
+++ b/libc/src/wctype/iswprint.h
@@ -0,0 +1,21 @@
+//===-- Implementation header for iswprint ----------------------*- 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_ISWPRINT_H
+#define LLVM_LIBC_SRC_WCTYPE_ISWPRINT_H
+
+#include "hdr/types/wint_t.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+int iswprint(wint_t c);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_WCTYPE_ISWPRINT_H
diff --git a/libc/test/src/wctype/CMakeLists.txt b/libc/test/src/wctype/CMakeLists.txt
index 060d1b4744e7b..67974a4fa28f7 100644
--- a/libc/test/src/wctype/CMakeLists.txt
+++ b/libc/test/src/wctype/CMakeLists.txt
@@ -41,3 +41,13 @@ add_libc_test(
DEPENDS
libc.src.wctype.iswlower
)
+
+add_libc_test(
+ iswprint_test
+ SUITE
+ libc_wctype_unittests
+ SRCS
+ iswprint_test.cpp
+ DEPENDS
+ libc.src.wctype.iswprint
+)
diff --git a/libc/test/src/wctype/iswprint_test.cpp b/libc/test/src/wctype/iswprint_test.cpp
new file mode 100644
index 0000000000000..c83932b4b9785
--- /dev/null
+++ b/libc/test/src/wctype/iswprint_test.cpp
@@ -0,0 +1,22 @@
+//===-- Unittests for iswprint --------------------------------------------===//
+//
+// 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/iswprint.h"
+
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibciswprint, SimpleTest) {
+ for (int ch = -255; ch < 255; ++ch) {
+ if (' ' <= ch && ch <= '~') {
+ EXPECT_NE(LIBC_NAMESPACE::iswprint(ch), 0);
+ } else {
+ EXPECT_EQ(LIBC_NAMESPACE::iswprint(ch), 0);
+ }
+ }
+}
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