1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
use super::OneDReader;
use crate::common::Result;
use crate::{BarcodeFormat, Exceptions};
use rxing_one_d_proc_derive::{EANReader, OneDReader};
use super::upc_ean_reader;
use super::UPCEANReader;
/**
* <p>Implements decoding of the EAN-8 format.</p>
*
* @author Sean Owen
*/
#[derive(OneDReader, EANReader, Default)]
pub struct EAN8Reader;
impl UPCEANReader for EAN8Reader {
fn getBarcodeFormat(&self) -> crate::BarcodeFormat {
BarcodeFormat::EAN_8
}
fn decodeMiddle(
&self,
row: &crate::common::BitArray,
startRange: &[usize; 2],
resultString: &mut String,
) -> Result<usize> {
let mut counters = [0_u32; 4]; //decodeMiddleCounters;
// counters[0] = 0;
// counters[1] = 0;
// counters[2] = 0;
// counters[3] = 0;
let end = row.get_size();
let mut rowOffset = startRange[1];
let mut x = 0;
while x < 4 && rowOffset < end {
let bestMatch =
self.decodeDigit(row, &mut counters, rowOffset, &upc_ean_reader::L_PATTERNS)?;
resultString
.push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::PARSE)?);
rowOffset += counters.iter().sum::<u32>() as usize;
x += 1;
}
let middleRange =
self.findGuardPattern(row, rowOffset, true, &upc_ean_reader::MIDDLE_PATTERN)?;
rowOffset = middleRange[1];
let mut x = 0;
while x < 4 && rowOffset < end {
let bestMatch =
self.decodeDigit(row, &mut counters, rowOffset, &upc_ean_reader::L_PATTERNS)?;
resultString
.push(char::from_u32('0' as u32 + bestMatch as u32).ok_or(Exceptions::PARSE)?);
rowOffset += counters.iter().sum::<u32>() as usize;
x += 1;
}
Ok(rowOffset)
}
}