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gcc/libiberty/memchr.c
Roger Sayle 0ae0f1b084 argv.c: Use ANSI_PROTOTYPES instead of __STDC__.
* argv.c: Use ANSI_PROTOTYPES instead of __STDC__.
	* memchr.c: Likewise.
	* strcasecmp.c: Likewise.
	* strncasecmp.c: Likewise.
	* strncmp.c: Likewise.
	* xatexit.c: Likewise.
	* xmalloc.c: Likewise.

	* copysign.c: Use traditional function declaration instead of DEFUN.
	* sigsetmask.c: Likewise.

	* memcmp.c: Both of the above, ANSI_PROTOTYPES and DEFUN.
	* memset.c: Likewise.

	* memcpy.c: ANSI_PROTOTYPES, DEFUN and prototype bcopy.
	* memmove.c: Likewise.

From-SVN: r65619
2003-04-15 03:35:47 +00:00

40 lines
912 B
C

/*
@deftypefn Supplemental void* memchr (const void *@var{s}, int @var{c}, size_t @var{n})
This function searches memory starting at @code{*@var{s}} for the
character @var{c}. The search only ends with the first occurrence of
@var{c}, or after @var{length} characters; in particular, a null
character does not terminate the search. If the character @var{c} is
found within @var{length} characters of @code{*@var{s}}, a pointer
to the character is returned. If @var{c} is not found, then @code{NULL} is
returned.
@end deftypefn
*/
#include <ansidecl.h>
#ifdef ANSI_PROTOTYPES
#include <stddef.h>
#else
#define size_t unsigned long
#endif
PTR
memchr (src_void, c, length)
register const PTR src_void;
int c;
size_t length;
{
const unsigned char *src = (const unsigned char *)src_void;
while (length-- > 0)
{
if (*src == c)
return (PTR)src;
src++;
}
return NULL;
}