27.2.14 Filtering and deleting

Function: %bytevector-s8-filter criterion bv start past

Function: %bytevector-u8-filter criterion bv start past

Macro: bytevector-s8-filter B criterion

Macro: bytevector-u8-filter B criterion

Filter the selected subvector, retaining only those bytes that satisfy the criterion argument; a byte is retained when:

• If criterion is an exact integer: the byte has to be equal to it.
• If criterion is a character: the byte has to be equal to it.
• If criterion is a character set: the byte, interpreted as ASCII character, has to be contained in it.
• If criterion is a procedure: the procedure applied to the byte must return true.

Always return a newly allocated bytevector.

Function: %bytevector-s8-delete criterion bv start past

Function: %bytevector-u8-delete criterion bv start past

Macro: bytevector-s8-delete B criterion

Macro: bytevector-u8-delete B criterion

Filter the selected subvector, retaining only those bytes that do not satisfy the criterion argument; a byte is deleted when:

• If criterion is an exact integer: the byte has to be different from it.
• If criterion is a character: the byte has to be different from it.
• If criterion is a character set: the byte, interpreted as ASCII character, must not be contained in it.
• If criterion is a procedure: the procedure applied to the byte must return false.

Always return a newly allocated bytevector.