[libc] add wcspbrk

Author: RossComputerGuy

libc/config/gpu/entrypoints.txt

@@ -261,6 +261,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.time.nanosleep
 
     # wchar.h entrypoints
+    libc.src.wchar.wcspbrk
     libc.src.wchar.wcsrchr
     libc.src.wchar.wcschr
     libc.src.wchar.wcslen

libc/config/linux/aarch64/entrypoints.txt

@@ -349,6 +349,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.unistd.write
 
     # wchar.h entrypoints
+    libc.src.wchar.wcspbrk
     libc.src.wchar.wcsrchr
     libc.src.wchar.wcschr
     libc.src.wchar.wcslen

libc/config/linux/riscv/entrypoints.txt

@@ -346,6 +346,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.unistd.write
 
     # wchar.h entrypoints
+    libc.src.wchar.wcspbrk
     libc.src.wchar.wcsrchr
     libc.src.wchar.wcschr
     libc.src.wchar.wcslen

libc/config/linux/x86_64/entrypoints.txt

@@ -348,6 +348,7 @@ set(TARGET_LIBC_ENTRYPOINTS
     libc.src.unistd.write
 
     # wchar.h entrypoints
+    libc.src.wchar.wcspbrk
     libc.src.wchar.wcsrchr
     libc.src.wchar.wcschr
     libc.src.wchar.wcslen

libc/hdrgen/yaml/wchar.yaml

@@ -42,3 +42,10 @@ functions:
     arguments:
       - type: const wchar_t *
       - type: wchar_t
+  - name: wcspbrk
+    standards:
+      - stdc
+    return_type: const wchar_t *
+    arguments:
+      - type: const wchar_t *
+      - type: const wchar_t *

libc/src/wchar/CMakeLists.txt

@@ -69,3 +69,14 @@ add_entrypoint_object(
     .wcslen
     libc.hdr.types.wchar_t
 )
+
+add_entrypoint_object(
+  wcspbrk
+  SRCS
+    wcspbrk.cpp
+  HDRS
+    wcspbrk.h
+  DEPENDS
+    .wcslen
+    libc.hdr.types.wchar_t
+)

libc/src/wchar/wcspbrk.cpp

@@ -0,0 +1,37 @@
+//===-- Implementation of wcspbrk -----------------------------------------===//
+//
+// 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/wchar/wcspbrk.h"
+#include "src/__support/common.h"
+#include "src/__support/macros/config.h"
+#include "wcslen.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(const wchar_t *, wcspbrk,
+                   (const wchar_t *wcs, const wchar_t *accept)) {
+  size_t n_accept = wcslen(accept);
+
+  for (size_t i = 0; i < wcslen(wcs); i++) {
+    bool accepted = true;
+
+    for (size_t x = 0; x < n_accept; i++) {
+      if (wcs[i] != accept[x]) {
+        accepted = false;
+        break;
+      }
+    }
+
+    if (!accepted)
+      continue;
+    return &wcs[i];
+  }
+  return nullptr;
+}
+
+} // namespace LIBC_NAMESPACE_DECL

libc/src/wchar/wcspbrk.h

@@ -0,0 +1,21 @@
+//===-- Implementation header for wcspbrk -----------------------*- 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_WCHAR_WCSPBRK_H
+#define LLVM_LIBC_SRC_WCHAR_WCSPBRK_H
+
+#include "hdr/types/wchar_t.h"
+#include "src/__support/macros/config.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+const wchar_t *wcspbrk(const wchar_t *wcs, const wchar_t *accept);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_WCHAR_WCSPBRK_H