strlen - get string length
#include <string.h>
size_t strlen(const char *s);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to the ISO C standard.The strlen() function shall compute the number of bytes in the string to which s points, not including the terminating null byte.
The strlen() function shall return the length of s; no return value shall be reserved to indicate an error.
No errors are defined.
Getting String Lengths
The following example sets the maximum length of key and data by using strlen() to get the lengths of those strings.
#include <string.h> ... struct element { char *key; char *data; }; ... char *key, *data; int len;
*keylength = *datalength = 0; ... if ((len = strlen(key)) > *keylength) *keylength = len; if ((len = strlen(data)) > *datalength) *datalength = len; ...
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The Base Definitions volume of IEEE Std 1003.1-2001, <string.h>
First released in Issue 1. Derived from Issue 1 of the SVID.
The RETURN VALUE section is updated to indicate that strlen() returns the length of s, and not s itself as was previously stated.