strpbrk, wcspbrk, _mbspbrk, _mbspbrk_l

Artículo
07/24/2011

Scan strings for characters in specified character sets.

char *strpbrk(
   const char *str,
   const char *strCharSet 
); // C only
char *strpbrk(
   char *str,
   const char *strCharSet 
); // C++ only
const char *strpbrk(
   const char *str,
   const char *strCharSet 
); // C++ only
wchar_t *wcspbrk(
   const wchar_t *str,
   const wchar_t *strCharSet 
); // C only
wchar_t *wcspbrk(
   wchar_t *str,
   const wchar_t *strCharSet 
); // C++ only
const wchar_t *wcspbrk(
   const wchar_t *str,
   const wchar_t *strCharSet 
); // C++ only
unsigned char *_mbspbrk(
   const unsigned char *str,
   const unsigned char *strCharSet 
); // C only
unsigned char *_mbspbrk(
   unsigned char *str,
   const unsigned char *strCharSet 
); // C++ only
const unsigned char *_mbspbrk(
   const unsigned char *str,
   const unsigned char *strCharSet 
); // C++ only
unsigned char *_mbspbrk_l(
   const unsigned char *str,
   const unsigned char *strCharSet,
   _locale_t locale
); // C only
unsigned char *_mbspbrk_l(
   unsigned char *str,
   const unsigned char *strCharSet,
   _locale_t locale
); // C++ only
const unsigned char *_mbspbrk_l(
   const unsigned char *str,
   const unsigned char* strCharSet,
   _locale_t locale
); // C++ only

Parameters

str
Null-terminated, searched string.
strCharSet
Null-terminated character set.
locale
Locale to use.

Return Value

Returns a pointer to the first occurrence of any character from strCharSet in str, or a NULL pointer if the two string arguments have no characters in common.

Remarks

The strpbrk function returns a pointer to the first occurrence of a character in str that belongs to the set of characters in strCharSet. The search does not include the terminating null character.

wcspbrk and _mbspbrk are wide-character and multibyte-character versions of strpbrk. The arguments and return value of wcspbrk are wide-character strings; those of _mbspbrk are multibyte-character strings.

_mbspbrk validates its parameters. If str or strCharSet is NULL, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, _mbspbrk returns NULL and sets errno to EINVAL. strpbrk and wcspbrk do not validate their parameters. These three functions behave identically otherwise.

_mbspbrk is similar to _mbscspn except that _mbspbrk returns a pointer rather than a value of type size_t.

In C, these functions take a const pointer for the first argument. In C++, two overloads are available. The overload taking a pointer to const returns a pointer to const; the version that takes a pointer to non-const returns a pointer to non-const. The macro _CONST_CORRECT_OVERLOADS is defined if both the const and non-const versions of these functions are available. If you require the non-const behavior for both C++ overloads, define the symbol _CONST_RETURN.

The output value is affected by the setting of the LC_CTYPE category setting of the locale; for more information, see setlocale. The versions of these functions without the _l suffix use the current locale for this locale-dependent behavior; the version with the _l suffix is identical except that it uses the locale parameter passed in instead. For more information, see Locale.

Generic-Text Routine Mappings

TCHAR.H routine	_UNICODE & _MBCS not defined	_MBCS defined	_UNICODE defined
_tcspbrk	strpbrk	_mbspbrk	wcspbrk
n/a	n/a	_mbspbrk_l	n/a

Requirements

Routine	Required header
strpbrk	<string.h>
wcspbrk	<string.h> or <wchar.h>
_mbspbrk, _mbspbrk_l	<mbstring.h>

For more information about compatibility, see Compatibility.

Example

// crt_strpbrk.c

#include <string.h>
#include <stdio.h>

int main( void )
{
   char string[100] = "The 3 men and 2 boys ate 5 pigs\n";
   char *result = NULL;

   // Return pointer to first digit in "string".
   printf( "1: %s\n", string );
   result = strpbrk( string, "0123456789" );
   printf( "2: %s\n", result++ );
   result = strpbrk( result, "0123456789" );
   printf( "3: %s\n", result++ );
   result = strpbrk( result, "0123456789" );
   printf( "4: %s\n", result );
}

1: The 3 men and 2 boys ate 5 pigs

2: 3 men and 2 boys ate 5 pigs

3: 2 boys ate 5 pigs

4: 5 pigs

.NET Framework Equivalent

System::String::IndexOfAny

Compartir a través de