[libc] Add ctype.h locale variants (#102711)

Summary:
This patch adds all the libc ctype variants. These ignore the locale
ingormation completely, so they're pretty much just stubs. Because these
use locale information, which is system scope, we do not enable building
them outisde of full build mode.

Author: jhuber6

libc/config/gpu/entrypoints.txt

@@ -4,21 +4,35 @@ set(TARGET_LIBC_ENTRYPOINTS
 
     # ctype.h entrypoints
     libc.src.ctype.isalnum
+    libc.src.ctype.isalnum_l
     libc.src.ctype.isalpha
+    libc.src.ctype.isalpha_l
     libc.src.ctype.isascii
     libc.src.ctype.isblank
+    libc.src.ctype.isblank_l
     libc.src.ctype.iscntrl
+    libc.src.ctype.iscntrl_l
     libc.src.ctype.isdigit
+    libc.src.ctype.isdigit_l
     libc.src.ctype.isgraph
+    libc.src.ctype.isgraph_l
     libc.src.ctype.islower
+    libc.src.ctype.islower_l
     libc.src.ctype.isprint
+    libc.src.ctype.isprint_l
     libc.src.ctype.ispunct
+    libc.src.ctype.ispunct_l
     libc.src.ctype.isspace
+    libc.src.ctype.isspace_l
     libc.src.ctype.isupper
+    libc.src.ctype.isupper_l
     libc.src.ctype.isxdigit
+    libc.src.ctype.isxdigit_l
     libc.src.ctype.toascii
     libc.src.ctype.tolower
+    libc.src.ctype.tolower_l
     libc.src.ctype.toupper
+    libc.src.ctype.toupper_l
 
     # string.h entrypoints
     libc.src.string.bcmp
@@ -233,6 +247,15 @@ set(TARGET_LIBC_ENTRYPOINTS
     # wchar.h entrypoints
     libc.src.wchar.wctob
 
+    # locale.h entrypoints
+    libc.src.locale.localeconv
+    libc.src.locale.duplocale
+    libc.src.locale.freelocale
+    libc.src.locale.localeconv
+    libc.src.locale.newlocale
+    libc.src.locale.setlocale
+    libc.src.locale.uselocale
+
     # gpu/rpc.h entrypoints
     libc.src.gpu.rpc_host_call
 )

libc/config/gpu/headers.txt

@@ -16,6 +16,7 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.wchar
     libc.include.uchar
     libc.include.features
+    libc.include.locale
 
     # Header for RPC extensions
     libc.include.gpu_rpc

libc/config/linux/x86_64/entrypoints.txt

@@ -782,6 +782,22 @@ endif()
 
 if(LLVM_LIBC_FULL_BUILD)
   list(APPEND TARGET_LIBC_ENTRYPOINTS
+    # ctype.h entrypoints
+    libc.src.ctype.isalnum_l
+    libc.src.ctype.isalpha_l
+    libc.src.ctype.isblank_l
+    libc.src.ctype.iscntrl_l
+    libc.src.ctype.isdigit_l
+    libc.src.ctype.isgraph_l
+    libc.src.ctype.islower_l
+    libc.src.ctype.isprint_l
+    libc.src.ctype.ispunct_l
+    libc.src.ctype.isspace_l
+    libc.src.ctype.isupper_l
+    libc.src.ctype.isxdigit_l
+    libc.src.ctype.tolower_l
+    libc.src.ctype.toupper_l
+
     # assert.h entrypoints
     libc.src.assert.__assert_fail
 
@@ -982,6 +998,15 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.time.nanosleep
     libc.src.time.time
 
+    # locale.h entrypoints
+    libc.src.locale.localeconv
+    libc.src.locale.duplocale
+    libc.src.locale.freelocale
+    libc.src.locale.localeconv
+    libc.src.locale.newlocale
+    libc.src.locale.setlocale
+    libc.src.locale.uselocale
+
     # unistd.h entrypoints
     libc.src.unistd.__llvm_libc_syscall
     libc.src.unistd._exit

libc/config/linux/x86_64/headers.txt

@@ -33,6 +33,7 @@ set(TARGET_PUBLIC_HEADERS
     libc.include.unistd
     libc.include.wchar
     libc.include.uchar
+    libc.include.locale
 
     libc.include.arpa_inet
 

libc/hdr/types/CMakeLists.txt

@@ -162,3 +162,12 @@ add_proxy_header_library(
     libc.include.llvm-libc-types.cookie_io_functions_t
     libc.include.stdio
 )
+
+add_proxy_header_library(
+  locale_t
+  HDRS
+    locale_t.h
+  FULL_BUILD_DEPENDS
+    libc.include.llvm-libc-types.locale_t
+    libc.include.locale
+)

libc/hdr/types/locale_t.h

@@ -0,0 +1,22 @@
+//===-- Definition of macros from locale_t.h ------------------------------===//
+//
+// 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_HDR_LOCALE_T_H
+#define LLVM_LIBC_HDR_LOCALE_T_H
+
+#ifdef LIBC_FULL_BUILD
+
+#include "include/llvm-libc-types/locale_t.h"
+
+#else // overlay mode
+
+#error "type not available in overlay mode"
+
+#endif // LLVM_LIBC_FULL_BUILD
+
+#endif // LLVM_LIBC_HDR_LOCALE_T_H

libc/include/CMakeLists.txt

@@ -45,6 +45,7 @@ add_header_macro(
   ctype.h
   DEPENDS
     .llvm_libc_common_h
+    .llvm-libc-types.locale_t
 )
 
 add_header_macro(
@@ -719,6 +720,18 @@ add_header_macro(
     .llvm-libc-types.wchar_t
 )
 
+add_header_macro(
+  locale
+  ../libc/newhdrgen/yaml/locale.yaml
+  locale.h.def
+  locale.h
+  DEPENDS
+    .llvm_libc_common_h
+    .llvm-libc-macros.locale_macros
+    .llvm-libc-types.locale_t
+    .llvm-libc-types.struct_lconv
+)
+
 if(LIBC_TARGET_OS_IS_GPU)
   file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/gpu)
 

libc/include/llvm-libc-macros/CMakeLists.txt

@@ -295,3 +295,9 @@ add_macro_header(
   HDR
     elf-macros.h
 )
+
+add_macro_header(
+  locale_macros
+  HDR
+    locale-macros.h
+)

libc/include/llvm-libc-macros/locale-macros.h

@@ -0,0 +1,32 @@
+//===-- Definition of macros from locale.h --------------------------------===//
+//
+// 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_MACROS_LOCALE_MACROS_H
+#define LLVM_LIBC_MACROS_LOCALE_MACROS_H
+
+#include "../llvm-libc-types/locale_t.h"
+
+#define LC_CTYPE 0
+#define LC_NUMERIC 1
+#define LC_TIME 2
+#define LC_COLLATE 3
+#define LC_MONETARY 4
+#define LC_MESSAGES 5
+#define LC_ALL 6
+
+#define LC_GLOBAL_LOCALE ((locale_t)(-1))
+
+#define LC_CTYPE_MASK (1 << LC_CTYPE)
+#define LC_NUMERIC_MASK (1 << LC_NUMERIC)
+#define LC_TIME_MASK (1 << LC_TIME)
+#define LC_COLLATE_MASK (1 << LC_COLLATE)
+#define LC_MONETARY_MASK (1 << LC_MONETARY)
+#define LC_MESSAGES_MASK (1 << LC_MESSAGES)
+#define LC_ALL_MASK 0x7fffffff
+
+#endif // LLVM_LIBC_MACROS_LOCALE_MACROS_H

libc/include/llvm-libc-types/CMakeLists.txt

@@ -142,3 +142,5 @@ DEPENDS
   .fsblkcnt_t
   .fsfilcnt_t
 )
+add_header(locale_t HDR locale_t.h)
+add_header(struct_lconv HDR struct_lconv.h)