summaryrefslogtreecommitdiff
path: root/StdLib/Include/stdarg.h
diff options
context:
space:
mode:
authordarylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524>2011-08-15 19:05:36 +0000
committerdarylm503 <darylm503@6f19259b-4bc3-4df7-8a09-765794883524>2011-08-15 19:05:36 +0000
commita430bdb13215eac169cd1c7e3e2fe88124c84b8e (patch)
treec3cbc5768c704fab8d21b07c29a62c2e0f08bf06 /StdLib/Include/stdarg.h
parentabb4e5f3460fd4bf6ab1bf7ef67a8bddaf238f67 (diff)
Update or add comments to files and functions for use by Doxygen.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12139 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'StdLib/Include/stdarg.h')
-rw-r--r--StdLib/Include/stdarg.h87
1 files changed, 47 insertions, 40 deletions
diff --git a/StdLib/Include/stdarg.h b/StdLib/Include/stdarg.h
index b966a5ce2b..b9de364232 100644
--- a/StdLib/Include/stdarg.h
+++ b/StdLib/Include/stdarg.h
@@ -1,54 +1,53 @@
/** @file
- The header <stdarg.h> declares a type and defines three macros, for advancing
- through a list of arguments whose number and types are not known to the
- called function when it is translated.
-
- A function may be called with a variable number of arguments of varying types.
- Its parameter list contains one or more parameters. The rightmost parameter
- plays a special role in the access mechanism, and will be designated paramN
- in this description.
-
- The type va_list is a type suitable for holding information needed by the
- macros va_start, va_arg, and va_end. If access to the varying arguments
- is desired, the called function shall declare an object (referred to as ap
- in these descriptions) having type va_list. The object ap may be passed as
- an argument to another function; if that function invokes the va_arg macro
- with parameter ap, the value of ap in the calling function is indeterminate
- and shall be passed to the va_end macro prior to any further reference to ap.
-
- The va_start and va_arg macros shall be implemented as macros, not as actual
- functions. It is unspecified, by the C library standards, whether va_end
- is a macro or an identifier declared with external linkage. If a macro
- definition is suppressed in order to access an actual function, or a
- program defines an external identifier with the name va_end, the behavior
- is undefined. The va_start and va_end macros shall be invoked in the
- function accepting a varying number of arguments, if access to the varying
- arguments is desired.
-
-Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
-This program and the accompanying materials are licensed and made available under
-the terms and conditions of the BSD License that accompanies this distribution.
-The full text of the license may be found at
-http://opensource.org/licenses/bsd-license.php.
-
-THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-
+ This header, <stdarg.h>, declares type va_list and defines macros: va_start, va_arg, va_end;
+ for advancing through a list of arguments whose number and types are not known to the
+ called function when it is translated.
+
+ A function may be called with a variable number of arguments of varying types.
+ The rightmost argument plays a special role in the access mechanism, and will
+ be designated paramN in this and subsequent descriptions.
+
+ The type va_list is a type suitable for holding information needed by the
+ macros va_start, va_arg, and va_end. If access to the varying arguments
+ is desired, the called function shall declare an object (referred to as ap
+ in these descriptions) having type va_list. The object ap may be passed as
+ an argument to another function; if the receiving function invokes the va_arg macro
+ with parameter ap, the value of ap in the calling function becomes indeterminate
+ and must be passed to the va_end macro prior to any further reference to ap.
+
+ The va_start and va_arg macros must be implemented as macros, not as actual
+ functions. The va_start and va_end macros must be invoked in the
+ function accepting a varying number of arguments, if access to the varying
+ arguments is desired.
+
+ Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>
+ This program and the accompanying materials are licensed and made available under
+ the terms and conditions of the BSD License that accompanies this distribution.
+ The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef _STDARG_H
#define _STDARG_H
#include <sys/EfiCdefs.h>
-/** The type va_list is a type suitable for holding information needed by the
+/** @{
+ The type va_list is a type suitable for holding information needed by the
macros va_start, va_arg, and va_end.
+
+ Depending upon compiler or CPU architecture, different definitions are required.
**/
#if defined(__GNUC__)
typedef __builtin_va_list va_list;
#else
#define va_list VA_LIST
#endif
+/*@}*/
-/** The va_start macro shall be invoked before any access to the unnamed arguments.
+/** @{
+ The va_start macro must be invoked before any access to the unnamed arguments.
The va_start macro initializes ap for subsequent use by va_arg and va_end.
Synopsys: void va_start(va_list ap, paramN);
@@ -71,8 +70,10 @@ typedef __builtin_va_list va_list;
#else
#define va_start VA_START
#endif
+/*@}*/
-/** The va_arg macro expands to an expression that has the type and value of
+/** @{
+ The va_arg macro expands to an expression that has the type and value of
the next argument in the call. The parameter ap shall be the same as the
va_list ap initialized by va_start. Each invocation of va_arg modifies ap
so that the values of successive arguments are returned in turn. The
@@ -99,8 +100,10 @@ typedef __builtin_va_list va_list;
#else
#define va_arg VA_ARG
#endif
+/*@}*/
-/** The va_end macro facillitates a normal return from the function whose
+/** @{
+ The va_end macro facillitates a normal return from the function whose
variable argument list was referred to by the expansion of va_start that
initialized the va_list ap.
@@ -119,12 +122,16 @@ typedef __builtin_va_list va_list;
#else
#define va_end VA_END
#endif
+/*@}*/
-/** For BSD compatibility. **/
+/** @{
+ For BSD compatibility.
+**/
#if defined(__GNUC__)
#define va_copy __builtin_va_copy
#else
#define va_copy(s,d) (s) = (d)
#endif
+/*@}*/
#endif /* _STDARG_H */