strpbrk.c

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/***************************************************************************//**
 @file strpbrk.c
 
 @brief Defines the strpbrk function
*******************************************************************************/
#include <string.h>
 
/*******************************************************************************
 strpbrk
*//**
 @brief Locate the first occurrence of any of s2 in s1
 @param *s1 String being searched
 @param *s2 String of characters to search for
 
 The strpbrk function locates the first occurrence in the string pointed to
 by s1 of any character from the string pointed to by s2.
 
 @return A pointer to the character, or NULL if no character was found
*******************************************************************************/
char *
strpbrk(const char *s1, const char *s2)
{
 size_t idx = 0;
 
 if (!s1)
 {
 return NULL;
 }
 
 idx = strcspn(s1, s2);
 if ('\0' == s1[idx])
 {
 return NULL;
 }
 
 return (char *)(s1 + idx);
}