Enrico Fraccaroli (Galfurian)
28 lines
995 B
C
28 lines
995 B
C
/// @file stdarg.h
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/// @brief Contains the macros required to manage variable number of arguments.
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/// @copyright (c) 2014-2024 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#pragma once
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/// @brief The va_list type is an array containing a single element of one
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/// structure containing the necessary information to implement the
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/// va_arg macro.
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typedef char *va_list;
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/// @brief The type of the item on the stack.
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#define va_item int
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/// @brief Amount of space required in an argument list (ie. the stack) for an
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/// argument of type t.
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#define va_size(t) \
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(((sizeof(t) + sizeof(va_item) - 1) / sizeof(va_item)) * sizeof(va_item))
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/// @brief The start of a variadic list.
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#define va_start(ap, last_arg) (ap = ((va_list)(&last_arg) + va_size(last_arg)))
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/// @brief The end of a variadic list.
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#define va_end(ap) ((void)0)
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/// @brief The argument of a variadic list.
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#define va_arg(ap, t) (ap += va_size(t), *((t *)(ap - va_size(t))))
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