strrchr
From cppreference.com
C
Concurrency support (C11)
Null-terminated byte strings
Functions
Character manipulation
Conversions to and from numeric formats
(C99)(C99)
(C99)(C99)
(C23)(C23)(C23)
String manipulation
String examination
Memory manipulation
Miscellaneous
(C11)(C11)
Defined in header
<string.h>
char* strrchr( const char* str, int ch );
(1)
/*QChar*/* strrchr( /*QChar*/* str, int ch );
(2)
(since C23)
1) Finds the last occurrence of ch (after conversion to char as if by (char)ch) in the null-terminated byte string pointed to by str (each character interpreted as unsigned char). The terminating null character is considered to be a part of the string and can be found if searching for '0円'.
2) Type-generic function equivalent to (1). Let
T be an unqualified character object type.
- If
stris of type const T*, the return type is const char*. - Otherwise, if
stris of type T*, the return type is char*. - Otherwise, the behavior is undefined.
- If
The behavior is undefined if str is not a pointer to a null-terminated byte string.
[edit] Parameters
str
-
pointer to the null-terminated byte string to be analyzed
ch
-
character to search for
[edit] Return value
Pointer to the found character in str, or null pointer if no such character is found.
[edit] Example
Run this code
#include <stdio.h> #include <string.h> int main(void) { char szSomeFileName[] = "foo/bar/foobar.txt"; char* pLastSlash = strrchr(szSomeFileName, '/'); char* pszBaseName = pLastSlash ? pLastSlash + 1 : szSomeFileName; printf ("Base Name: %s", pszBaseName); }
Output:
Base Name: foobar.txt
[edit] References
- C23 standard (ISO/IEC 9899:2024):
- 7.24.5.5 The strrchr function (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.24.5.5 The strrchr function (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.24.5.5 The strrchr function (p: 368-369)
- C99 standard (ISO/IEC 9899:1999):
- 7.21.5.5 The strrchr function (p: 331)
- C89/C90 standard (ISO/IEC 9899:1990):
- 4.11.5.5 The strrchr function
[edit] See also
C++ documentation for strrchr