C-string.h-APIs
---------------------
.. _strlen: https://man7.org/linux/man-pages/man3/strlen.3.html
.. _strcat: https://man7.org/linux/man-pages/man3/strcat.3.html
.. _strncat: https://man7.org/linux/man-pages/man3/strncat.3p.html
.. _strlcat: https://linux.die.net/man/3/strlcat
.. _strcmp: https://man7.org/linux/man-pages/man3/strcmp.3p.html
.. _strncmp: https://man7.org/linux/man-pages/man3/strncmp.3p.html
.. _strchr: https://man7.org/linux/man-pages/man3/strchr.3p.html
.. _strrchr: https://man7.org/linux/man-pages/man3/strrchr.3p.html
.. _strchrnul: https://linux.die.net/man/3/strchrnul
.. _strstr: https://man7.org/linux/man-pages/man3/strstr.3p.html
.. _strcasestr: https://linux.die.net/man/3/strcasestr
.. _strcasecmp: https://man7.org/linux/man-pages/man3/strcasecmp.3p.html
.. _strpbrk: https://man7.org/linux/man-pages/man3/strpbrk.3p.html
.. _strsep: https://man7.org/linux/man-pages/man3/strsep.3.html
.. _strspn: https://man7.org/linux/man-pages/man3/strspn.3p.html
.. _strtok: https://man7.org/linux/man-pages/man3/strtok.3p.html
.. _strtok_r: https://man7.org/linux/man-pages/man3/strtok_r.3p.html
.. _strcpy: https://man7.org/linux/man-pages/man3/strcpy.3p.html
.. _strncpy: https://man7.org/linux/man-pages/man3/strncpy.3p.html
.. _strlcpy: https://linux.die.net/man/3/strlcpy
.. _stpcpy: https://man7.org/linux/man-pages/man3/stpcpy.3p.html
.. _strcoll: https://man7.org/linux/man-pages/man3/strcoll.3p.html
.. _strcspn: https://man7.org/linux/man-pages/man3/strcspn.3p.html
.. _strdup: https://man7.org/linux/man-pages/man3/strdup.3p.html
.. _strndup: https://man7.org/linux/man-pages/man3/strndup.3p.html
.. _strfry: https://man7.org/linux/man-pages/man3/strfry.3.html
.. _strxfrm: https://man7.org/linux/man-pages/man3/strxfrm.3p.html

=============   ===============================================================
API name        API description
=============   ===============================================================
strlen_         calculate the length of a string
strcat_         concatenate two strings
strncat_        concatenate two strings
strlcat_        size-bounded string concatenation
strcmp_         compare two strings
strncmp_        compare part of two strings
strchr_         string scanning operation
strrchr_        string scanning operation
strchrnul_      string scanning operation
strstr_         find a substring
strcasestr_     find a substring
strcasecmp_     case-insensitive string comparisons
strpbrk_        scan a string for a byte
strsep_         extract token from string
strspn_         get length of a substring
strtok_         split string into tokens
strtok_r_       split string into tokens
strcpy_         copy a string and return a pointer to the end of the result
strncpy_        copy fixed length string, returning a pointer to the array end
strlcpy_        size-bounded string copying
stpcpy_         copy a string and return a pointer to the end of the result
strcoll_        string comparison using collating information
strcspn_        get the length of a complementary substring
strdup_         duplicate a specific number of bytes from a string
strndup_        duplicate a specific number of bytes from a string
strfry_         randomize a string
strxfrm_        string transformation
=============   ===============================================================