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b9a2658a3e
This patch implements the forwarding to frozen C++03 headers as discussed in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the RFC, we initially proposed selecting the right headers from the Clang driver, however consensus seemed to steer towards handling this in the library itself. This patch implements that direction. At a high level, the changes basically amount to making each public header look like this: ``` // inside <vector> #ifdef _LIBCPP_CXX03_LANG # include <__cxx03/vector> #else // normal <vector> content #endif ``` In most cases, public headers are simple umbrella headers so there isn't much code in the #else branch. In other cases, the #else branch contains the actual implementation of the header.
180 lines
5.8 KiB
C++
180 lines
5.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_CSTDIO
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#define _LIBCPP_CSTDIO
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/*
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cstdio synopsis
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Macros:
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BUFSIZ
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EOF
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FILENAME_MAX
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FOPEN_MAX
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L_tmpnam
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NULL
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SEEK_CUR
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SEEK_END
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SEEK_SET
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TMP_MAX
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_IOFBF
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_IOLBF
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_IONBF
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stderr
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stdin
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stdout
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namespace std
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{
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Types:
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FILE
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fpos_t
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size_t
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int remove(const char* filename);
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int rename(const char* old, const char* new);
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FILE* tmpfile(void);
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char* tmpnam(char* s);
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int fclose(FILE* stream);
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int fflush(FILE* stream);
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FILE* fopen(const char* restrict filename, const char* restrict mode);
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FILE* freopen(const char* restrict filename, const char * restrict mode,
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FILE * restrict stream);
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void setbuf(FILE* restrict stream, char* restrict buf);
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int setvbuf(FILE* restrict stream, char* restrict buf, int mode, size_t size);
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int fprintf(FILE* restrict stream, const char* restrict format, ...);
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int fscanf(FILE* restrict stream, const char * restrict format, ...);
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int printf(const char* restrict format, ...);
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int scanf(const char* restrict format, ...);
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int snprintf(char* restrict s, size_t n, const char* restrict format, ...); // C99
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int sprintf(char* restrict s, const char* restrict format, ...);
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int sscanf(const char* restrict s, const char* restrict format, ...);
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int vfprintf(FILE* restrict stream, const char* restrict format, va_list arg);
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int vfscanf(FILE* restrict stream, const char* restrict format, va_list arg); // C99
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int vprintf(const char* restrict format, va_list arg);
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int vscanf(const char* restrict format, va_list arg); // C99
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int vsnprintf(char* restrict s, size_t n, const char* restrict format, // C99
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va_list arg);
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int vsprintf(char* restrict s, const char* restrict format, va_list arg);
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int vsscanf(const char* restrict s, const char* restrict format, va_list arg); // C99
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int fgetc(FILE* stream);
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char* fgets(char* restrict s, int n, FILE* restrict stream);
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int fputc(int c, FILE* stream);
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int fputs(const char* restrict s, FILE* restrict stream);
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int getc(FILE* stream);
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int getchar(void);
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char* gets(char* s); // removed in C++14
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int putc(int c, FILE* stream);
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int putchar(int c);
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int puts(const char* s);
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int ungetc(int c, FILE* stream);
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size_t fread(void* restrict ptr, size_t size, size_t nmemb,
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FILE* restrict stream);
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size_t fwrite(const void* restrict ptr, size_t size, size_t nmemb,
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FILE* restrict stream);
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int fgetpos(FILE* restrict stream, fpos_t* restrict pos);
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int fseek(FILE* stream, long offset, int whence);
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int fsetpos(FILE*stream, const fpos_t* pos);
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long ftell(FILE* stream);
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void rewind(FILE* stream);
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void clearerr(FILE* stream);
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int feof(FILE* stream);
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int ferror(FILE* stream);
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void perror(const char* s);
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} // std
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*/
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#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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# include <__cxx03/cstdio>
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#else
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# include <__config>
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# include <__cstddef/size_t.h>
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# include <stdio.h>
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# ifndef _LIBCPP_STDIO_H
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# error <cstdio> tried including <stdio.h> but didn't find libc++'s <stdio.h> header. \
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This usually means that your header search paths are not configured properly. \
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The header search paths should contain the C++ Standard Library headers before \
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any C Standard Library, and you are probably using compiler flags that make that \
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not be the case.
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# endif
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# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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# endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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using ::FILE _LIBCPP_USING_IF_EXISTS;
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using ::fpos_t _LIBCPP_USING_IF_EXISTS;
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using ::fclose _LIBCPP_USING_IF_EXISTS;
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using ::fflush _LIBCPP_USING_IF_EXISTS;
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using ::setbuf _LIBCPP_USING_IF_EXISTS;
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using ::setvbuf _LIBCPP_USING_IF_EXISTS;
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using ::fprintf _LIBCPP_USING_IF_EXISTS;
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using ::fscanf _LIBCPP_USING_IF_EXISTS;
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using ::snprintf _LIBCPP_USING_IF_EXISTS;
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using ::sprintf _LIBCPP_USING_IF_EXISTS;
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using ::sscanf _LIBCPP_USING_IF_EXISTS;
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using ::vfprintf _LIBCPP_USING_IF_EXISTS;
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using ::vfscanf _LIBCPP_USING_IF_EXISTS;
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using ::vsscanf _LIBCPP_USING_IF_EXISTS;
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using ::vsnprintf _LIBCPP_USING_IF_EXISTS;
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using ::vsprintf _LIBCPP_USING_IF_EXISTS;
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using ::fgetc _LIBCPP_USING_IF_EXISTS;
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using ::fgets _LIBCPP_USING_IF_EXISTS;
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using ::fputc _LIBCPP_USING_IF_EXISTS;
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using ::fputs _LIBCPP_USING_IF_EXISTS;
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using ::getc _LIBCPP_USING_IF_EXISTS;
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using ::putc _LIBCPP_USING_IF_EXISTS;
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using ::ungetc _LIBCPP_USING_IF_EXISTS;
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using ::fread _LIBCPP_USING_IF_EXISTS;
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using ::fwrite _LIBCPP_USING_IF_EXISTS;
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using ::fgetpos _LIBCPP_USING_IF_EXISTS;
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using ::fseek _LIBCPP_USING_IF_EXISTS;
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using ::fsetpos _LIBCPP_USING_IF_EXISTS;
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using ::ftell _LIBCPP_USING_IF_EXISTS;
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using ::rewind _LIBCPP_USING_IF_EXISTS;
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using ::clearerr _LIBCPP_USING_IF_EXISTS;
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using ::feof _LIBCPP_USING_IF_EXISTS;
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using ::ferror _LIBCPP_USING_IF_EXISTS;
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using ::perror _LIBCPP_USING_IF_EXISTS;
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using ::fopen _LIBCPP_USING_IF_EXISTS;
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using ::freopen _LIBCPP_USING_IF_EXISTS;
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using ::remove _LIBCPP_USING_IF_EXISTS;
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using ::rename _LIBCPP_USING_IF_EXISTS;
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using ::tmpfile _LIBCPP_USING_IF_EXISTS;
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using ::tmpnam _LIBCPP_USING_IF_EXISTS;
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using ::getchar _LIBCPP_USING_IF_EXISTS;
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# if _LIBCPP_STD_VER <= 11
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using ::gets _LIBCPP_USING_IF_EXISTS;
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# endif
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using ::scanf _LIBCPP_USING_IF_EXISTS;
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using ::vscanf _LIBCPP_USING_IF_EXISTS;
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using ::printf _LIBCPP_USING_IF_EXISTS;
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using ::putchar _LIBCPP_USING_IF_EXISTS;
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using ::puts _LIBCPP_USING_IF_EXISTS;
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using ::vprintf _LIBCPP_USING_IF_EXISTS;
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_LIBCPP_END_NAMESPACE_STD
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#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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#endif // _LIBCPP_CSTDIO
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