1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 #include <tinycbor/cbor_buf_reader.h>
21 #include <tinycbor/extract_number_p.h>
22
23 static uint8_t
cbuf_buf_reader_get8(struct cbor_decoder_reader * d,int offset)24 cbuf_buf_reader_get8(struct cbor_decoder_reader *d, int offset)
25 {
26 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
27 return cb->buffer[offset];
28 }
29
30 static uint16_t
cbuf_buf_reader_get16(struct cbor_decoder_reader * d,int offset)31 cbuf_buf_reader_get16(struct cbor_decoder_reader *d, int offset)
32 {
33 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
34 return get16(cb->buffer + offset);
35 }
36
37 static uint32_t
cbuf_buf_reader_get32(struct cbor_decoder_reader * d,int offset)38 cbuf_buf_reader_get32(struct cbor_decoder_reader *d, int offset)
39 {
40 uint32_t val;
41 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
42 val = get32(cb->buffer + offset);
43 return val;
44 }
45
46 static uint64_t
cbuf_buf_reader_get64(struct cbor_decoder_reader * d,int offset)47 cbuf_buf_reader_get64(struct cbor_decoder_reader *d, int offset)
48 {
49 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
50 return get64(cb->buffer + offset);
51 }
52
53 static uintptr_t
cbor_buf_reader_cmp(struct cbor_decoder_reader * d,char * dst,int src_offset,size_t len)54 cbor_buf_reader_cmp(struct cbor_decoder_reader *d, char *dst, int src_offset,
55 size_t len)
56 {
57 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
58 return memcmp(dst, cb->buffer + src_offset, len) == 0;
59 }
60
61 static uintptr_t
cbor_buf_reader_cpy(struct cbor_decoder_reader * d,char * dst,int src_offset,size_t len)62 cbor_buf_reader_cpy(struct cbor_decoder_reader *d, char *dst, int src_offset,
63 size_t len)
64 {
65 struct cbor_buf_reader *cb = (struct cbor_buf_reader *) d;
66 return (uintptr_t) memcpy(dst, cb->buffer + src_offset, len);
67 }
68
69 void
cbor_buf_reader_init(struct cbor_buf_reader * cb,const uint8_t * buffer,size_t data)70 cbor_buf_reader_init(struct cbor_buf_reader *cb, const uint8_t *buffer,
71 size_t data)
72 {
73 cb->buffer = buffer;
74 cb->r.get8 = &cbuf_buf_reader_get8;
75 cb->r.get16 = &cbuf_buf_reader_get16;
76 cb->r.get32 = &cbuf_buf_reader_get32;
77 cb->r.get64 = &cbuf_buf_reader_get64;
78 cb->r.cmp = &cbor_buf_reader_cmp;
79 cb->r.cpy = &cbor_buf_reader_cpy;
80 cb->r.message_size = data;
81 }
82
