Category : C++ Source Code
Archive : VCCRT1.ZIP
Filename : LFIND.C
Output of file : LFIND.C contained in archive : VCCRT1.ZIP
*lfind.c - do a linear search
*
* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines lfind() - do a linear search of an array.
*
*******************************************************************************/
#include
#include
#include
/***
*void *_lfind(key, base, num, width, compare) - do a linear search
*
*Purpose:
* Performs a linear search on the array, looking for the value key
* in an array of num elements of width bytes in size. Returns
* a pointer to the array value if found, NULL if not found.
*
*Entry:
* void *key - key to search for
* void *base - base of array to search
* unsigned *num - number of elements in array
* int width - number of bytes in each array element
* int (*compare)() - pointer to function that compares two array values,
* returning 0 if they are equal and non-0 if they are
* different. Two pointers to array elements are
* passed to this function.
*
*Exit:
* if key found:
* returns pointer to array element
* if key not found:
* returns NULL
*
*Exceptions:
*
*******************************************************************************/
void * _lfind (key, base, num, width, compare)
REG2 const void *key;
REG1 const void *base;
REG3 unsigned int *num;
unsigned int width;
int (*compare)(const void *, const void *);
{
unsigned int place = 0;
while ( place < *num )
if ( !(*compare)(key, base) )
return((void *) base);
else
{
base = (char *) base + width;
place++;
}
return(NULL);
}
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