1 /* codec.h -*- mode:c; coding:utf-8; -*- 2 * 3 * Copyright (c) 2010-2021 Takashi Kato <ktakashi@ymail.com> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 22 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $Id: $ 29 */ 30 #ifndef SAGITTARIUS_PRIVATE_CODEC_H_ 31 #define SAGITTARIUS_PRIVATE_CODEC_H_ 32 33 #include "sagittariusdefs.h" 34 #include "clos.h" 35 36 typedef enum { 37 UTF_16BE, 38 UTF_16LE, 39 UTF_16CHECK_BOM, 40 UTF_32BE, 41 UTF_32LE, 42 UTF_32USE_NATIVE_ENDIAN, 43 NO_BOM, 44 } SgEndianness; 45 46 typedef enum { 47 SG_BUILTIN_CODEC, 48 SG_CUSTOM_CODEC 49 } SgCodecType; 50 51 struct SgCodecRec 52 { 53 SG_HEADER; 54 SgString *name; 55 SgCodecType type; 56 union { 57 struct { 58 /* TODO read and write; */ 59 int (*putc)(SgObject, SgPort*, SgChar, SgErrorHandlingMode); 60 SgChar (*getc)(SgObject, SgPort*, SgErrorHandlingMode, int); 61 int64_t (*readc)(SgObject, SgPort*, SgChar*, int64_t, 62 SgErrorHandlingMode, int); 63 int64_t (*writec)(SgObject, SgPort*, SgChar *, int64_t, 64 SgErrorHandlingMode); 65 SgEndianness endian; 66 /* only for utf16 and utf32 */ 67 int littlep; 68 } builtin; 69 struct { 70 /* TODO read and write */ 71 SgObject getc; 72 SgObject putc; 73 SgObject readc; 74 SgObject writec; 75 SgObject data; 76 } custom; 77 } impl; 78 }; 79 80 SG_CLASS_DECL(Sg_CodecClass); 81 #define SG_CLASS_CODEC (&Sg_CodecClass) 82 83 #define SG_CODECP(obj) SG_XTYPEP(obj, SG_CLASS_CODEC) 84 #define SG_CODEC(obj) ((SgCodec*)obj) 85 /* accessor */ 86 #define SG_CODEC_NAME(obj) (SG_CODEC(obj)->name) 87 88 #define SG_CODEC_BUILTIN(obj) (&(SG_CODEC(obj)->impl.builtin)) 89 #define SG_CODEC_CUSTOM(obj) (&(SG_CODEC(obj)->impl.custom)) 90 91 #define SG_CODEC_ENDIAN(obj) (SG_CODEC_BUILTIN(obj)->endian) 92 93 SG_CDECL_BEGIN 94 95 SG_EXTERN SgObject Sg_MakeUtf8Codec(); 96 SG_EXTERN SgObject Sg_MakeUtf16Codec(SgEndianness endian); 97 SG_EXTERN SgObject Sg_MakeUtf32Codec(SgEndianness endian); 98 SG_EXTERN SgObject Sg_MakeLatin1Codec(); 99 100 /* check BOM */ 101 SG_EXTERN SgEndianness Sg_Utf16CheckBOM(SgByteVector *bv); 102 SG_EXTERN SgEndianness Sg_Utf32CheckBOM(SgByteVector *bv); 103 104 /* Scheme interface */ 105 SG_EXTERN SgObject Sg_MakeCustomCodecSimple(SgObject name, SgObject getc, 106 SgObject putc, SgObject data); 107 108 SG_CDECL_END 109 110 #endif /* SAGITTARIUS_CODEC_H_ */ 111 112 /* 113 end of file 114 Local Variables: 115 coding: utf-8-unix 116 End: 117 */ 118