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Article contents:[[tags: egg]] == bytevector-utils [[toc:]] == Documentation === Bytevector Utils ; {{BV}} : {{(or bytevector srfi-4-vector)}} ; {{IDX}} : {{fixnum}} ; {(<= 0 ...)} ==== Usage <enscript language=scheme> (import bytevector-utils) </enscript> ==== bytevector-u8-set! ==== bytevector-s8-set! <procedure>(bytevector-u8-set! BV IDX UINT)</procedure> <procedure>(bytevector-s8-set! BV IDX INT)</procedure> ; {{UINT}} : {{fixnum}} ; 0..(2^8)-1 ; {{INT}} : {{fixnum}} ; -(2^7)..(2^7)-1 ==== bytevector-u16-set! ==== bytevector-s16-set! <procedure>(bytevector-u16-set! BV IDX UINT [ORDER])</procedure> <procedure>(bytevector-s16-set! BV IDX INT [ORDER])</procedure> ; {{UINT}} : {{fixnum}} ; 0..(2^16)-1 ; {{INT}} : {{fixnum}} ; -(2^15)..(2^15)-1 ==== bytevector-u32-set! ==== bytevector-s32-set! <procedure>(bytevector-u32-set! BV IDX UINT [ORDER])</procedure> <procedure>(bytevector-s32-set! BV IDX INT [ORDER])</procedure> ; {{UINT}} : {{number}} ; 0..(2^32)-1 ; {{INT}} : {{number}} ; -(2^31)..(2^31)-1 ==== bytevector-u64-set! ==== bytevector-s64-set! <procedure>(bytevector-u64-set! BV IDX UINT [ORDER])</procedure> <procedure>(bytevector-s64-set! BV IDX INT [ORDER])</procedure> ; {{UINT}} : {{number}} ; 0..(2^64)-1 ; {{INT}} : {{number}} ; -(2^63)..(2^63)-1 === Bytevector Set Int Stuff integers into a bytevector. ==== Usage <enscript language=scheme> (import bytevector-set-int) </enscript> ==== bytevector-set-u8! <procedure>(bytevector-set-u8! BV N [(OFFSET 0)])</procedure> Sets the byte at {{OFFSET}} to {{N}} in {{BV}}. ==== bytevector-set-u16-le! <procedure>(bytevector-set-u16-le! BV N [(OFFSET 0)])</procedure> Sets the 2 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. ==== bytevector-set-u16-be! <procedure>(bytevector-set-u16-be! BV N [(OFFSET 0)])</procedure> Sets the 2 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. ==== bytevector-set-u32-le! <procedure>(bytevector-set-u32-le! BV N [(OFFSET 0)])</procedure> Sets the 4 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. ==== bytevector-set-u32-be! <procedure>(bytevector-set-u32-be! BV N [(OFFSET 0)])</procedure> Sets the 4 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. ==== bytevector-set-u64-le! <procedure>(bytevector-set-u64-le! BV N [(OFFSET 0)])</procedure> Sets the 8 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. ==== bytevector-set-u64-be! <procedure>(bytevector-set-u64-be! BV N [(OFFSET 0)])</procedure> Sets the 8 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. ==== *bytevector-set-u8! <procedure>(*bytevector-set-u8! BV N OFFSET)</procedure> Sets the byte at {{OFFSET}} to {{N}} in {{BV}}. Performs no argument checking. ==== *bytevector-set-u16-le! <procedure>(*bytevector-set-u16-le! BV N OFFSET)</procedure> Sets the 2 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. Performs no argument checking. ==== *bytevector-set-u16-be! <procedure>(*bytevector-set-u16-be! BV N OFFSET)</procedure> Sets the 2 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. Performs no argument checking. ==== *bytevector-set-u32-le! <procedure>(*bytevector-set-u32-le! BV N OFFSET)</procedure> Sets the 4 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. Performs no argument checking. ==== *bytevector-set-u32-be! <procedure>(*bytevector-set-u32-be! BV N OFFSET)</procedure> Sets the 4 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. Performs no argument checking. ==== *bytevector-set-u64-le! <procedure>(*bytevector-set-u64-le! BV N OFFSET)</procedure> Sets the 8 bytes at {{OFFSET}} to {{N}} in {{BV}} using little-endian byte order. Performs no argument checking. ==== *bytevector-set-u64-be! <procedure>(*bytevector-set-u64-be! BV N OFFSET)</procedure> Sets the 8 bytes at {{OFFSET}} to {{N}} in {{BV}} using big-endian byte order. Performs no argument checking. === Pack Integer Set integer in bytevector. ; {{KIND}} : {{(or symbol bytevector pointer)}} ; {{symbol}} from {{(bytevector pointer)}} ; {{START}} : {{fixnum}} ; {{(<= 0 ...)}} ; {{ORDER}} : {{symbol}} ; {{big-endian be big little-endian le little}} The pack functions are pure or mutating depending on the {{KIND}}. ==== Usage <enscript language=scheme> (import pack-integer) </enscript> ==== pack-u8 <procedure>(pack-u8 N [kind: KIND] [start: START]) -> PACK</procedure> Returns the number {{N}} packed into an object of {{KIND}}, at position {{START}}. ==== pack-u16 <procedure>(pack-u16 N [kind: KIND] [start: START] [order: ORDER]) -> PACK</procedure> Returns the number {{N}} packed into an object of {{KIND}}, at position {{START}}. ==== pack-u32 <procedure>(pack-u32 N [kind: KIND] [start: START] [order: ORDER]) -> PACK</procedure> Returns the number {{N}} packed into an object of {{KIND}}, at position {{START}}. ==== pack-u64 <procedure>(pack-u64 N [kind: KIND] [start: START] [order: ORDER]) -> PACK</procedure> Returns the number {{N}} packed into an object of {{KIND}}, at position {{START}}. ==== pack-integer <procedure>(pack-integer N [kind: KIND] [start: START] [order: ORDER]) -> PACK</procedure> Returns the number {{N}} packed into an object of {{KIND}}, at position {{START}}. == Notes * The {{pack-int}} & {{blob-utils}} APIs overlap. * The {{pack-int}} API should be bit-indexed. == Requirements [[string-utils]] [[check-errors]] [[test]] == Author [[/users/kon-lovett|Kon Lovett]] == Repository This egg is hosted on the CHICKEN Subversion repository: [[https://anonymous@code.call-cc.org/svn/chicken-eggs/release/5/blob-utils|https://anonymous@code.call-cc.org/svn/chicken-eggs/release/5/blob-utils]] If you want to check out the source code repository of this egg and you are not familiar with Subversion, see [[/egg-svn-checkout|this page]]. == Version history ; 1.0.1 : Fix signatures. ; 1.0.0 : CHICKEN 6 release. == License Copyright (C) 2026 Kon Lovett. All rights reserved. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 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