lfind.cpp File Reference

#include <corecrt_internal.h>
#include <search.h>

Include dependency graph for lfind.cpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	__fileDECL   __cdecl
#define	__COMPARE(context, p1, p2)   (*compare)(p1, p2)

Functions
void *__fileDECL	_lfind (void const *const key, void const *const base, unsigned int *const num, unsigned int const width, int(__fileDECL *const compare)(void const *, void const *))

Macro Definition Documentation

__COMPARE

#define __COMPARE	(		context,
			p1,
			p2
	)		(*compare)(p1, p2)

Definition at line 22 of file lfind.cpp.

__fileDECL

#define __fileDECL   __cdecl

Definition at line 14 of file lfind.cpp.

Function Documentation

_lfind()

void *__fileDECL _lfind	(	void const *const	key,
		void const *const	base,
		unsigned int *const	num,
		unsigned int const	width,
		int(__fileDECL *const compare)(void const *, void const *)
	)

Definition at line 51 of file lfind.cpp.

{
    _VALIDATE_RETURN(key != nullptr, EINVAL, nullptr);
    _VALIDATE_RETURN(num != nullptr, EINVAL, nullptr);
    _VALIDATE_RETURN(base != nullptr || *num == 0, EINVAL, nullptr);
    _VALIDATE_RETURN(width > 0, EINVAL, nullptr);
    _VALIDATE_RETURN(compare != nullptr, EINVAL, nullptr);
 
    char const* const first = static_cast<char const*>(base);
    char const* const last  = first + *num * width;
 
    for (char const* p = first; p != last; p += width)
    {
        if (__COMPARE(context, key, const_cast<char*>(p)) == 0)
        {
            return const_cast<char*>(p);
        }
    }
 
    return nullptr;
}