94 lines
3.6 KiB
C
94 lines
3.6 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
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* Copyright © 2023 Andrius Štikonas <andrius@stikonas.eu>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MES_STDARG_H
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#define __MES_STDARG_H 1
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#if SYSTEM_LIBC
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#undef __MES_STDARG_H
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#include_next <stdarg.h>
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#define va_arg8(ap, type) va_arg (ap, type)
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#elif (__GNUC__ || __TINYC__) && __riscv
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// GCC on RISC-V always passes arguments in registers. Implementing
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// these macros without the use of built-ins would be very involved.
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// TINYCC tries to be GCC compatible in this case.
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#if __TINYC__ < 928
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// Bootstrappable TINYCC (version < 928) needs some definitions in RISC-V
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typedef char *__builtin_va_list;
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#define __va_reg_size (__riscv_xlen >> 3)
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#define _tcc_align(addr, type) \
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(((unsigned long)addr + __alignof__(type) - 1) \
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& -(__alignof__(type)))
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#define __builtin_va_arg(ap, type) \
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(*(sizeof (type) > (2*__va_reg_size) \
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? *(type **)((ap += __va_reg_size) - __va_reg_size) \
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: (ap = (va_list)(_tcc_align (ap, type) \
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+ (sizeof (type) + __va_reg_size - 1) \
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& -__va_reg_size), \
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(type *)(ap - ((sizeof (type)+ __va_reg_size - 1) \
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& -__va_reg_size)))))
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#define __builtin_va_end(ap) (void)(ap)
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#if !defined (__builtin_va_copy)
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#define __builtin_va_copy(dest, src) (dest) = (src)
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#endif
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#endif // __TINYC__ < 928
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typedef __builtin_va_list va_list;
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#define va_start(v, l) __builtin_va_start (v, l)
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#define va_end(v) __builtin_va_end (v)
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#define va_arg(v, l) __builtin_va_arg (v, l)
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#define va_arg8(ap, type) va_arg (ap, type)
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#define va_copy(d, s) __builtin_va_copy (d, s)
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#else // ! SYSTEM_LIBC && ! __riscv
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#include <sys/types.h>
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#if __GNUC__ && __x86_64__
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#define __FOO_VARARGS 1
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#endif
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typedef char *va_list;
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#define va_start(ap, last) (void)((ap) = (char*)(&(last)) + sizeof (void*))
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#define va_arg(ap, type) (type)(((long*)((ap) = ((ap) + sizeof (void*))))[-1])
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#define va_align(ap, alignment) ((char*)((((unsigned long) (ap)) + (alignment) - 1) &~ ((alignment) - 1)))
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#define va_arg8(ap, type) (type)(((double*)((ap) = (va_align((ap), 8) + sizeof(double))))[-1])
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#define va_end(ap) (void)((ap) = 0)
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#define va_copy(dest, src) dest = src
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int vexec (char const *file_name, va_list ap);
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int vfprintf (FILE * stream, char const *template, va_list ap);
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int vfscanf (FILE * stream, char const *template, va_list ap);
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int vprintf (char const *format, va_list ap);
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int vsprintf (char *str, char const *format, va_list ap);
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int vsnprintf (char *str, size_t size, char const *format, va_list ap);
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int vsscanf (char const *s, char const *template, va_list ap);
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#endif // ! SYSTEM_LIBC
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#endif // __MES_STDARG_H
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