strpbrk

 

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

Algorithms

Numerics

Date and time utilities

Input/output support

Localization support

Concurrency support (哋它亢11)

Technical Specifications

Symbol index

 

Strings library

Byte strings

Multibyte strings

Wide strings

 

Null-terminated byte strings

Functions
Character manipulation
isalnum isalpha islower isupper isdigit isxdigit isblank (哋它亢99)	iscntrl isgraph isspace isprint ispunct tolower toupper
Conversions to and from numeric formats
atoiatolatoll (哋它亢99) atof strtolstrtoll (哋它亢99) strtoulstrtoull (哋它亢99)	strtoimaxstrtoumax (哋它亢99)(哋它亢99) strtofstrtodstrtold (哋它亢99)(哋它亢99) strfromfstrfromdstrfroml (哋它亢23)(哋它亢23)(哋它亢23)
String manipulation
strcpystrcpy_s (哋它亢11) strncpystrncpy_s (哋它亢11) strcatstrcat_s (哋它亢11)	strncatstrncat_s (哋它亢11) strxfrm strdup (哋它亢23) strndup (哋它亢23)
String examination
strlenstrnlen_s (哋它亢11) strcmp strncmp strcoll strchr strrchr	strspn strcspn strpbrk strstr strtokstrtok_s (哋它亢11)
Memory manipulation
memchr memcmp memsetmemset_explicitmemset_s (哋它亢23)(哋它亢11)	memcpymemcpy_s (哋它亢11) memmovememmove_s (哋它亢11) memccpy (哋它亢23)
Miscellaneous
strerrorstrerror_sstrerrorlen_s (哋它亢11)(哋它亢11)

 

Defined in header <string.h>
char *strpbrk( const char *dest, const char *breakset );	(1)
/*QChar*/ *strpbrk( /*QChar*/ *dest, const char *breakset );	(2)	(since 哋它亢23)

1 ) Scans the null-terminated byte string pointed to by dest for any character from the null-terminated byte string pointed to by breakset, and returns a pointer to that character.

2) Type-generic function equivalent to (1). Let T be an unqualified character object type.

• If dest is of type const T*, the return type is const char*.
• Otherwise, if dest is of type T*, the return type is char*.
• Otherwise, the behavior is undefined.

If a macro definition of each of these generic functions is suppressed to access an actual function (e.g. if (strpbrk) or a function pointer is used), the actual function declaration (1) becomes visible.

The behavior is undefined if either dest or breakset is not a pointer to a null-terminated byte string.

Parameters

dest	-	pointer to the null-terminated byte string to be analyzed
breakset	-	pointer to the null-terminated byte string that contains the characters to search for

Return value

Pointer to the first character in dest, that is also in breakset, or null pointer if no such character exists.

Notes

The name stands for "string pointer break", because it returns a pointer to the first of the separator ("break") characters.

Example

Run this code

#include <stdio.h>
#include <string.h>
 
int main(void)
{
    const char* str = "hello world, friend of mine!";
    const char* sep = " ,!";
 
    unsigned int cnt = 0;
    do
    {
       str = strpbrk(str, sep); // find separator
       if(str) str += strspn(str, sep); // skip separator
       ++cnt; // increment word count
    }
    while(str && *str);
 
    printf("There are %u words\n", cnt);
}

Output:

There are 5 words

References

• 哋它亢23 standard (ISO/IEC 9899:2023):

• 7.24.5.4 The strpbrk function (p: TBD)

• 哋它亢17 standard (ISO/IEC 9899:2018):

• 7.24.5.4 The strpbrk function (p: TBD)

• 哋它亢11 standard (ISO/IEC 9899:2011):

• 7.24.5.4 The strpbrk function (p: 368)

• 哋它亢99 standard (ISO/IEC 9899:1999):

• 7.21.5.4 The strpbrk function (p: 331)

• 哋它亢89/C90 standard (ISO/IEC 9899:1990):

• 4.11.5.4 The strpbrk function

See also

strcspn	returns the length of the maximum initial segment that consists of only the characters not found in another byte string (function)
strchr	finds the first occurrence of a character (function)
strtokstrtok_s (哋它亢11)	finds the next token in a byte string (function)