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150 lines
5.4 KiB
150 lines
5.4 KiB
5 years ago
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/* stdarg.h: ANSI 'C' (X3J11 Oct 88) library header, section 4.8 */
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/* Copyright (C) Codemist Ltd., 1988 */
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/* Copyright (C) ARM Ltd., 1991-1999. All rights reserved */
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/*
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* RCS $Revision: 185525 $
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* Checkin $Date: 2014-05-29 12:44:48 +0100 (Thu, 29 May 2014) $
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* Revising $Author: agrant $
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*/
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#ifndef __stdarg_h
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#define __stdarg_h
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#define __ARMCLIB_VERSION 5050106
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#ifndef __STDARG_DECLS
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#define __STDARG_DECLS
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#undef __CLIBNS
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#ifdef __cplusplus
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namespace std {
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#define __CLIBNS ::std::
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extern "C" {
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#else
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#define __CLIBNS
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#endif /* __cplusplus */
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/*
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* stdarg.h declares a type and defines macros for advancing through a
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* list of arguments whose number and types are not known to the called
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* function when it is translated. A function may be called with a variable
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* number of arguments of differing types. Its parameter list contains one or
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* more parameters. The rightmost parameter plays a special role in the access
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* mechanism, and will be called parmN in this description.
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*/
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/* N.B. <stdio.h> is required to declare vfprintf() without defining */
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/* va_list. Clearly the type __va_list there must keep in step. */
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#ifdef __clang__
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typedef __builtin_va_list va_list;
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#define va_start(ap, param) __builtin_va_start(ap, param)
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#define va_end(ap) __builtin_va_end(ap)
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#define va_arg(ap, type) __builtin_va_arg(ap, type)
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#if __STDC_VERSION__ >= 199900L || __cplusplus >= 201103L || !defined(__STRICT_ANSI__)
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#define va_copy(dest, src) __builtin_va_copy(dest, src)
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#endif
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#else
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#ifdef __TARGET_ARCH_AARCH64
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typedef struct __va_list {
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void *__stack;
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void *__gr_top;
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void *__vr_top;
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int __gr_offs;
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int __vr_offs;
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} va_list;
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#else
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typedef struct __va_list { void *__ap; } va_list;
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#endif
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/*
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* an array type suitable for holding information needed by the macro va_arg
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* and the function va_end. The called function shall declare a variable
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* (referred to as ap) having type va_list. The variable ap may be passed as
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* an argument to another function.
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* Note: va_list is an array type so that when an object of that type
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* is passed as an argument it gets passed by reference.
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*/
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#define va_start(ap, parmN) __va_start(ap, parmN)
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/*
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* The va_start macro shall be executed before any access to the unnamed
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* arguments. The parameter ap points to an object that has type va_list.
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* The va_start macro initialises ap for subsequent use by va_arg and
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* va_end. The parameter parmN is the identifier of the rightmost parameter
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* in the variable parameter list in the function definition (the one just
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* before the '...'). If the parameter parmN is declared with the register
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* storage class an error is given.
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* If parmN is a narrow type (char, short, float) an error is given in
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* strict ANSI mode, or a warning otherwise.
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* Returns: no value.
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*/
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#define va_arg(ap, type) __va_arg(ap, type)
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/*
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* The va_arg macro expands to an expression that has the type and value of
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* the next argument in the call. The parameter ap shall be the same as the
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* va_list ap initialised by va_start. Each invocation of va_arg modifies
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* ap so that successive arguments are returned in turn. The parameter
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* 'type' is a type name such that the type of a pointer to an object that
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* has the specified type can be obtained simply by postfixing a * to
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* 'type'. If type is a narrow type, an error is given in strict ANSI
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* mode, or a warning otherwise. If the type is an array or function type,
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* an error is given.
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* In non-strict ANSI mode, 'type' is allowed to be any expression.
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* Returns: The first invocation of the va_arg macro after that of the
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* va_start macro returns the value of the argument after that
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* specified by parmN. Successive invocations return the values of
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* the remaining arguments in succession.
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* The result is cast to 'type', even if 'type' is narrow.
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*/
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#define __va_copy(dest, src) ((void)((dest) = (src)))
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#if !defined(__STRICT_ANSI__) || (defined(__STDC_VERSION__) && 199901L <= __STDC_VERSION__)
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/* va_copy is in C99 and non-strict C90 and non-strict C++
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* __va_copy is always present.
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*/
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#define va_copy(dest, src) ((void)((dest) = (src)))
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/* The va_copy macro makes the va_list dest be a copy of
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* the va_list src, as if the va_start macro had been applied
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* to it followed by the same sequence of uses of the va_arg
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* macro as had previously been used to reach the present state
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* of src.
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*/
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#endif
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#define va_end(ap) __va_end(ap)
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/*
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* The va_end macro facilitates a normal return from the function whose
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* variable argument list was referenced by the expansion of va_start that
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* initialised the va_list ap. If the va_end macro is not invoked before
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* the return, the behaviour is undefined.
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* Returns: no value.
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*/
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#endif /* __clang__ */
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#ifdef __cplusplus
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} /* extern "C" */
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} /* namespace std */
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#endif /* __cplusplus */
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#ifdef __GNUC__
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/* be cooperative with glibc */
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typedef __CLIBNS va_list __gnuc_va_list;
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#define __GNUC_VA_LIST
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#undef __need___va_list
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#endif
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#endif /* __STDARG_DECLS */
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#ifdef __cplusplus
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#ifndef __STDARG_NO_EXPORTS
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using ::std::va_list;
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#endif
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#endif /* __cplusplus */
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#endif
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/* end of stdarg.h */
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