Working with strings in Cairo

• Yet another string library built to enable flexible manipulation
• Some functions to assemble and serve raw html from contract

str.cairo

• Str: a struct that encapsulates a felt array
• str_empty(): returns an empty Str instance
• str_from_literal(<string literal>): returns a Str instance that contains the string literal
• str_concat(<first Str>, <second Str>): returns a Str instance that contains the concatenation of two input Str
• str_concat_array(<length of Str array>, <pointer of Str array>): returns a Str instance that contains the concatenation of all input Str in the provided array

html_paragraph.cairo

• convert_str_array_to_html_string(<length of Str array>, <pointer of Str array>: wraps each Str in a paragraph tag, and returns a felt array that contains the resulting html in hex string form.

html_table.cairo

• convert_str_table_to_html_string(<table row count>, <table column count>, <length of flattened Str array>, <pointer of flattened Str array>): turns the flattened array of Str into a html table given row and column count, and returns a felt array t hat contains the resulting html in hex string form.