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__arraycount(3) [netbsd man page]

__ARRAYCOUNT(3) 					   BSD Library Functions Manual 					   __ARRAYCOUNT(3)

__arraycount -- macro for statically allocated arrays SYNOPSIS
#include <sys/cdefs.h> size_t __arraycount(x); DESCRIPTION
The __arraycount() macro returns the number of elements in a statically allocated buffer. EXAMPLES
The following example demonstrates a typical usage of __arraycount(): uint8_t buf[BUFSIZE]; size_t i; ... for (i = 0; i < __arraycount(buf); i++) ... SEE ALSO
cdefs(3) HISTORY
The __arraycount() macro first appeared in NetBSD 4.0. BSD
December 16, 2010 BSD

Check Out this Related Man Page

__CONCAT(3)						   BSD Library Functions Manual 					       __CONCAT(3)

__CONCAT, __STRING -- argument substitution SYNOPSIS
#include <sys/cdefs.h> xy __CONCAT(x, y); const char * __STRING(x); DESCRIPTION
The __CONCAT macro makes use of the cpp(1) preprocessor to concatenate two tokens. When the macro is expanded, x and y are combined into a single token, provided that the result forms a valid token; two tokens that together do not form a valid token can not be concatenated. This is known as ``token concatenation'' or ``token pasting''. The __STRING() macro uses the conventional '#' preprocessing operator to replace the argument x with a string literal. This is also known as ``stringification''. EXAMPLES
The following two printf(3) calls produce the same output: #define Net 0x01 #define BSD 0x02 #define NetBSD "NetBSD" (void)printf("%s ", __CONCAT(Net, BSD)); (void)printf("%s%s ", __STRING(Net), __STRING(BSD)); SEE ALSO
cpp(1), cdefs(3) HISTORY
The __CONCAT() and __STRING() macros first appeared in NetBSD 1.3. CAVEATS
Many small details direct the proper use of the macros. For example, while all leading and trailing whitespace is ignored when __STRING() is used, it is undefined whether cpp(1) puts white space between the tokens when __CONCAT() is used. It can be also noted that the C preproces- sor converts all comments to whitespace before any macros are even considered. The use of either macro is discouraged in complex constructs. BSD
December 16, 2010 BSD
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