lsearch.c raw

   1  #include <search.h>
   2  #include <string.h>
   3  
   4  void *lsearch(const void *key, void *base, size_t *nelp, size_t width,
   5  	int (*compar)(const void *, const void *))
   6  {
   7  	char (*p)[width] = base;
   8  	size_t n = *nelp;
   9  	size_t i;
  10  
  11  	for (i = 0; i < n; i++)
  12  		if (compar(key, p[i]) == 0)
  13  			return p[i];
  14  	*nelp = n+1;
  15  	return memcpy(p[n], key, width);
  16  }
  17  
  18  void *lfind(const void *key, const void *base, size_t *nelp,
  19  	size_t width, int (*compar)(const void *, const void *))
  20  {
  21  	char (*p)[width] = (void *)base;
  22  	size_t n = *nelp;
  23  	size_t i;
  24  
  25  	for (i = 0; i < n; i++)
  26  		if (compar(key, p[i]) == 0)
  27  			return p[i];
  28  	return 0;
  29  }
  30  
  31  
  32