| Miscellaneous functions | |
| strlen_P | Calculate length of a code string |
| Formatted output functions | |
| printf_P | Write code string formatted text to standard output |
| snprintf_P | Write code string formatted text to a string with truncation |
| sprintf_P | Write code string formatted text to a string |
| vprintf_P | Write code string formatted text to standard output using variable argument context |
| vsnprintf_P | Write code string formatted text to a string with truncation using variable argument context |
| vsprintf_P | Write code string formatted text to a string using variable argument context |
| Copying functions | |
| memcpy_P | Copy code memory to data memory |
| strcat_P | Concatenate a code string to a data string |
| strcpy_P | Copy code string to data string |
| strncpy_P | Copy code string to data string up to a maximum length |
| Formatted input functions | |
| scanf_P | Read code string formatted text from standard input |
| sscanf_P | Read code string formatted text from code string |
| vscanf_P | Read code string formatted text from standard using variable argument context |
| vsscanf_P | Read code string formatted text from a string using variable argument context |
| Character and string I/O functions | |
| puts_P | Write a code string to standard output |
| Comparison functions | |
| memcmp_P | Compare code memory with data memory |
| strcmp_P | Compare a code string to a data string |
| strncmp_P | Compare a code string to a data string up to a maximum length |