Multibyte subroutines

Multibyte subroutines process characters in file-code form. The names of these subroutines usually start with the prefix mb. However, some multibyte subroutines do not have this prefix. For example, the strcoll and strxfrm subroutines process characters in their multibyte form but do not have the mb prefix. The following standard C subroutines operate on bytes and can be used to handle multibyte data: strcmp, strcpy, strncmp, strncpy, strcat, and strncat. The standard C search subroutines strchr, strrchr, strpbrk, strcspn, strrchr, strspn, strstr, and strtok can be used in the following cases:

• Searching or scanning for characters in single-byte code sets
• Searching or scanning for unique code-point range characters in multibyte strings