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partial stub out of decoder
This commit is contained in:
Henry Schimke
@@ -4,357 +4,450 @@
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// */
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// // SPDX-License-Identifier: Apache-2.0
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// #include "QRDecoder.h"
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use crate::common::cpp_essentials::{DecoderResult, StructuredAppendInfo};
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use crate::common::reedsolomon::{
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get_predefined_genericgf, PredefinedGenericGF, ReedSolomonDecoder,
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};
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use crate::common::{
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AIFlag, BitMatrix, BitSource, CharacterSet, DecoderRXingResult, ECIStringBuilder, Eci, Result,
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SymbologyIdentifier,
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};
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use crate::qrcode::cpp_port::bitmatrix_parser::{
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ReadCodewords, ReadFormatInformation, ReadVersion,
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};
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use crate::qrcode::decoder::{DataBlock, ErrorCorrectionLevel, Mode, Version};
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use crate::Exceptions;
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// #include "BitMatrix.h"
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// #include "BitSource.h"
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// #include "CharacterSet.h"
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// #include "DecoderResult.h"
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// #include "GenericGF.h"
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// #include "QRBitMatrixParser.h"
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// #include "QRCodecMode.h"
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// #include "QRDataBlock.h"
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// #include "QRFormatInformation.h"
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// #include "QRVersion.h"
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// #include "ReedSolomonDecoder.h"
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// #include "StructuredAppend.h"
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// #include "ZXAlgorithms.h"
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// #include "ZXTestSupport.h"
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/**
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* <p>Given data and error-correction codewords received, possibly corrupted by errors, attempts to
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* correct the errors in-place using Reed-Solomon error correction.</p>
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*
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* @param codewordBytes data and error correction codewords
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* @param numDataCodewords number of codewords that are data bytes
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* @return false if error correction fails
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*/
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pub fn CorrectErrors(codewordBytes: &mut [u8], numDataCodewords: u32) -> Result<bool> {
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// First read into an array of ints
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// std::vector<int> codewordsInts(codewordBytes.begin(), codewordBytes.end());
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let mut codewordsInts = codewordBytes.iter().copied().map(|b| b as i32).collect();
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// #include <algorithm>
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// #include <stdexcept>
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// #include <utility>
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// #include <vector>
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let numECCodewords = ((codewordBytes.len() as u32) - numDataCodewords) as i32;
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let rs = ReedSolomonDecoder::new(get_predefined_genericgf(
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PredefinedGenericGF::QrCodeField256,
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));
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if rs.decode(&mut codewordsInts, numECCodewords)? == 0
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// if (!ReedSolomonDecode(GenericGF::QRCodeField256(), codewordsInts, numECCodewords))
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{
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return Ok(false);
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}
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// namespace ZXing::QRCode {
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// Copy back into array of bytes -- only need to worry about the bytes that were data
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// We don't care about errors in the error-correction codewords
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codewordBytes[..numDataCodewords as usize].copy_from_slice(
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&codewordsInts[..numDataCodewords as usize]
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.into_iter()
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.copied()
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.map(|i| i as u8)
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.collect::<Vec<u8>>(),
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);
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// std::copy_n(codewordsInts.begin(), numDataCodewords, codewordBytes.begin());
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// /**
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// * <p>Given data and error-correction codewords received, possibly corrupted by errors, attempts to
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// * correct the errors in-place using Reed-Solomon error correction.</p>
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// *
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// * @param codewordBytes data and error correction codewords
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// * @param numDataCodewords number of codewords that are data bytes
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// * @return false if error correction fails
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// */
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// static bool CorrectErrors(ByteArray& codewordBytes, int numDataCodewords)
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// {
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// // First read into an array of ints
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// std::vector<int> codewordsInts(codewordBytes.begin(), codewordBytes.end());
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Ok(true)
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}
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// int numECCodewords = Size(codewordBytes) - numDataCodewords;
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// if (!ReedSolomonDecode(GenericGF::QRCodeField256(), codewordsInts, numECCodewords))
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// return false;
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/**
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* See specification GBT 18284-2000
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*/
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pub fn DecodeHanziSegment(
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bits: &mut BitSource,
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count: u32,
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result: &mut ECIStringBuilder,
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) -> Result<()> {
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let mut count = count;
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// // Copy back into array of bytes -- only need to worry about the bytes that were data
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// // We don't care about errors in the error-correction codewords
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// std::copy_n(codewordsInts.begin(), numDataCodewords, codewordBytes.begin());
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// return true;
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// }
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// Each character will require 2 bytes, decode as GB2312
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// There is no ECI value for GB2312, use GB18030 which is a superset
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result.switch_encoding(CharacterSet::GB18030);
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result.reserve(2 * count as usize);
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while (count > 0) {
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// Each 13 bits encodes a 2-byte character
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let twoBytes = bits.readBits(13)?;
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let mut assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
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if (assembledTwoBytes < 0x00A00) {
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// In the 0xA1A1 to 0xAAFE range
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assembledTwoBytes += 0x0A1A1;
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} else {
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// In the 0xB0A1 to 0xFAFE range
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assembledTwoBytes += 0x0A6A1;
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}
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*result += ((assembledTwoBytes >> 8) & 0xFF) as u8;
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*result += (assembledTwoBytes & 0xFF) as u8;
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count -= 1;
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}
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Ok(())
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}
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// /**
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// * See specification GBT 18284-2000
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// */
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// static void DecodeHanziSegment(BitSource& bits, int count, Content& result)
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// {
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// // Each character will require 2 bytes, decode as GB2312
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// // There is no ECI value for GB2312, use GB18030 which is a superset
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// result.switchEncoding(CharacterSet::GB18030);
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// result.reserve(2 * count);
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pub fn DecodeKanjiSegment(
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bits: &mut BitSource,
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count: u32,
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result: &mut ECIStringBuilder,
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) -> Result<()> {
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let mut count = count;
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// Each character will require 2 bytes. Read the characters as 2-byte pairs
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// and decode as Shift_JIS afterwards
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result.switch_encoding(CharacterSet::Shift_JIS);
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result.reserve(2 * count as usize);
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// while (count > 0) {
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// // Each 13 bits encodes a 2-byte character
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// int twoBytes = bits.readBits(13);
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// int assembledTwoBytes = ((twoBytes / 0x060) << 8) | (twoBytes % 0x060);
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// if (assembledTwoBytes < 0x00A00) {
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// // In the 0xA1A1 to 0xAAFE range
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// assembledTwoBytes += 0x0A1A1;
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// } else {
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// // In the 0xB0A1 to 0xFAFE range
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// assembledTwoBytes += 0x0A6A1;
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// }
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// result += narrow_cast<uint8_t>((assembledTwoBytes >> 8) & 0xFF);
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// result += narrow_cast<uint8_t>(assembledTwoBytes & 0xFF);
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// count--;
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// }
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// }
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while (count > 0) {
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// Each 13 bits encodes a 2-byte character
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let twoBytes = bits.readBits(13)?;
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let mut assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
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if (assembledTwoBytes < 0x01F00) {
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// In the 0x8140 to 0x9FFC range
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assembledTwoBytes += 0x08140;
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} else {
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// In the 0xE040 to 0xEBBF range
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assembledTwoBytes += 0x0C140;
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}
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*result += (assembledTwoBytes >> 8) as u8;
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*result += (assembledTwoBytes) as u8;
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count -= 1;
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}
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Ok(())
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}
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// static void DecodeKanjiSegment(BitSource& bits, int count, Content& result)
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// {
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// // Each character will require 2 bytes. Read the characters as 2-byte pairs
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// // and decode as Shift_JIS afterwards
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// result.switchEncoding(CharacterSet::Shift_JIS);
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// result.reserve(2 * count);
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pub fn DecodeByteSegment(
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bits: &mut BitSource,
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count: u32,
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result: &mut ECIStringBuilder,
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) -> Result<()> {
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result.switch_encoding(CharacterSet::Unknown);
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result.reserve(count as usize);
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// while (count > 0) {
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// // Each 13 bits encodes a 2-byte character
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// int twoBytes = bits.readBits(13);
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// int assembledTwoBytes = ((twoBytes / 0x0C0) << 8) | (twoBytes % 0x0C0);
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// if (assembledTwoBytes < 0x01F00) {
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// // In the 0x8140 to 0x9FFC range
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// assembledTwoBytes += 0x08140;
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// } else {
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// // In the 0xE040 to 0xEBBF range
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// assembledTwoBytes += 0x0C140;
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// }
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// result += narrow_cast<uint8_t>(assembledTwoBytes >> 8);
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// result += narrow_cast<uint8_t>(assembledTwoBytes);
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// count--;
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// }
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// }
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for i in 0..count {
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// for (int i = 0; i < count; i++)
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*result += (bits.readBits(8)?) as u8;
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}
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Ok(())
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}
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// static void DecodeByteSegment(BitSource& bits, int count, Content& result)
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// {
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// result.switchEncoding(CharacterSet::Unknown);
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// result.reserve(count);
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pub fn ToAlphaNumericChar(value: u32) -> Result<char> {
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let value = value as usize;
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/**
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* See ISO 18004:2006, 6.4.4 Table 5
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*/
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const ALPHANUMERIC_CHARS: [char; 45] = [
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
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'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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' ', '$', '%', '*', '+', '-', '.', '/', ':',
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];
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// for (int i = 0; i < count; i++)
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// result += narrow_cast<uint8_t>(bits.readBits(8));
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// }
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if (value < 0 || value >= (ALPHANUMERIC_CHARS.len())) {
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return Err(Exceptions::index_out_of_bounds_with(
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"oAlphaNumericChar: out of range",
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));
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}
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// static char ToAlphaNumericChar(int value)
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// {
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// /**
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// * See ISO 18004:2006, 6.4.4 Table 5
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// */
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// static const char ALPHANUMERIC_CHARS[] = {
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// '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
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// 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
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// 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
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// ' ', '$', '%', '*', '+', '-', '.', '/', ':'
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// };
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Ok(ALPHANUMERIC_CHARS[value])
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}
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// if (value < 0 || value >= Size(ALPHANUMERIC_CHARS))
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// throw std::out_of_range("ToAlphaNumericChar: out of range");
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pub fn DecodeAlphanumericSegment(
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bits: &mut BitSource,
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count: u32,
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result: &mut ECIStringBuilder,
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) -> Result<()> {
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let mut count = count;
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// return ALPHANUMERIC_CHARS[value];
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// }
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// Read two characters at a time
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let mut buffer = String::new();
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// static void DecodeAlphanumericSegment(BitSource& bits, int count, Content& result)
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// {
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// // Read two characters at a time
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// std::string buffer;
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// while (count > 1) {
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// int nextTwoCharsBits = bits.readBits(11);
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// buffer += ToAlphaNumericChar(nextTwoCharsBits / 45);
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// buffer += ToAlphaNumericChar(nextTwoCharsBits % 45);
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// count -= 2;
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// }
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// if (count == 1) {
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// // special case: one character left
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// buffer += ToAlphaNumericChar(bits.readBits(6));
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// }
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// // See section 6.4.8.1, 6.4.8.2
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// if (result.symbology.aiFlag != AIFlag::None) {
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// // We need to massage the result a bit if in an FNC1 mode:
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// for (size_t i = 0; i < buffer.length(); i++) {
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// if (buffer[i] == '%') {
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// if (i < buffer.length() - 1 && buffer[i + 1] == '%') {
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// // %% is rendered as %
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// buffer.erase(i + 1);
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// } else {
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// // In alpha mode, % should be converted to FNC1 separator 0x1D
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// buffer[i] = static_cast<char>(0x1D);
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// }
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// }
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// }
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// }
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while count > 1 {
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let nextTwoCharsBits = bits.readBits(11)?;
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buffer.push(ToAlphaNumericChar(nextTwoCharsBits / 45)?);
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buffer.push(ToAlphaNumericChar(nextTwoCharsBits % 45)?);
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count -= 2;
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}
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if (count == 1) {
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// special case: one character left
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buffer.push(ToAlphaNumericChar(bits.readBits(6)?)?);
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}
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// See section 6.4.8.1, 6.4.8.2
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if (result.symbology.aiFlag != AIFlag::None) {
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// We need to massage the result a bit if in an FNC1 mode:
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for i in 0..buffer.len() {
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// for (size_t i = 0; i < buffer.length(); i++) {
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if (buffer
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.chars()
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.nth(i)
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.ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
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== '%')
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{
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if (i < buffer.len() - 1
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&& buffer
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.chars()
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.nth(i + 1)
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.ok_or(Exceptions::INDEX_OUT_OF_BOUNDS)?
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== '%')
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{
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// %% is rendered as %
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buffer.remove(i + 1);
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// buffer.erase(i + 1);
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} else {
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// In alpha mode, % should be converted to FNC1 separator 0x1D
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buffer.replace_range(i..i, &char::from(0x1D).to_string());
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// buffer[i] = static_cast<char>(0x1D);
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}
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}
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}
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}
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// result.switchEncoding(CharacterSet::ISO8859_1);
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// result += buffer;
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// }
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result.switch_encoding(CharacterSet::ISO8859_1);
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*result += buffer;
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// static void DecodeNumericSegment(BitSource& bits, int count, Content& result)
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// {
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// result.switchEncoding(CharacterSet::ISO8859_1);
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// result.reserve(count);
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Ok(())
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}
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// while (count) {
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// int n = std::min(count, 3);
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// int nDigits = bits.readBits(1 + 3 * n); // read 4, 7 or 10 bits into 1, 2 or 3 digits
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// result.append(ZXing::ToString(nDigits, n));
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// count -= n;
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// }
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// }
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pub fn DecodeNumericSegment(
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bits: &mut BitSource,
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count: u32,
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result: &mut ECIStringBuilder,
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) -> Result<()> {
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let mut count = count;
|
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||||
// static ECI ParseECIValue(BitSource& bits)
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// {
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// int firstByte = bits.readBits(8);
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// if ((firstByte & 0x80) == 0) {
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||||
// // just one byte
|
||||
// return ECI(firstByte & 0x7F);
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// }
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// if ((firstByte & 0xC0) == 0x80) {
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// // two bytes
|
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// int secondByte = bits.readBits(8);
|
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// return ECI(((firstByte & 0x3F) << 8) | secondByte);
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// }
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// if ((firstByte & 0xE0) == 0xC0) {
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// // three bytes
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// int secondThirdBytes = bits.readBits(16);
|
||||
// return ECI(((firstByte & 0x1F) << 16) | secondThirdBytes);
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||||
// }
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// throw FormatError("ParseECIValue: invalid value");
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// }
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result.switch_encoding(CharacterSet::ISO8859_1);
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result.reserve(count as usize);
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// /**
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// * QR codes encode mode indicators and terminator codes into a constant bit length of 4.
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// * Micro QR codes have terminator codes that vary in bit length but are always longer than
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||||
// * the mode indicators.
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// * M1 - 0 length mode code, 3 bits terminator code
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||||
// * M2 - 1 bit mode code, 5 bits terminator code
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||||
// * M3 - 2 bit mode code, 7 bits terminator code
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// * M4 - 3 bit mode code, 9 bits terminator code
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||||
// * IsTerminator peaks into the bit stream to see if the current position is at the start of
|
||||
// * a terminator code. If true, then the decoding can finish. If false, then the decoding
|
||||
// * can read off the next mode code.
|
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// *
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||||
// * See ISO 18004:2015, 7.4.1 Table 2
|
||||
// *
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||||
// * @param bits the stream of bits that might have a terminator code
|
||||
// * @param version the QR or micro QR code version
|
||||
// */
|
||||
// bool IsEndOfStream(const BitSource& bits, const Version& version)
|
||||
// {
|
||||
// const int bitsRequired = TerminatorBitsLength(version);
|
||||
// const int bitsAvailable = std::min(bits.available(), bitsRequired);
|
||||
// return bitsAvailable == 0 || bits.peakBits(bitsAvailable) == 0;
|
||||
// }
|
||||
while (count > 0) {
|
||||
let n = std::cmp::min(count, 3);
|
||||
let nDigits = bits.readBits(1 + 3 * n as usize)?; // read 4, 7 or 10 bits into 1, 2 or 3 digits
|
||||
result.append_string(&crate::common::cpp_essentials::util::ToString(
|
||||
nDigits as usize,
|
||||
n as usize,
|
||||
)?);
|
||||
count -= n;
|
||||
}
|
||||
|
||||
// /**
|
||||
// * <p>QR Codes can encode text as bits in one of several modes, and can use multiple modes
|
||||
// * in one QR Code. This method decodes the bits back into text.</p>
|
||||
// *
|
||||
// * <p>See ISO 18004:2006, 6.4.3 - 6.4.7</p>
|
||||
// */
|
||||
Ok(())
|
||||
}
|
||||
|
||||
pub fn ParseECIValue(bits: &mut BitSource) -> Result<Eci> {
|
||||
let firstByte = bits.readBits(8)?;
|
||||
if ((firstByte & 0x80) == 0) {
|
||||
// just one byte
|
||||
return Ok(Eci::from(firstByte & 0x7F));
|
||||
}
|
||||
if ((firstByte & 0xC0) == 0x80) {
|
||||
// two bytes
|
||||
let secondByte = bits.readBits(8)?;
|
||||
return Ok(Eci::from(((firstByte & 0x3F) << 8) | secondByte));
|
||||
}
|
||||
if ((firstByte & 0xE0) == 0xC0) {
|
||||
// three bytes
|
||||
let secondThirdBytes = bits.readBits(16)?;
|
||||
return Ok(Eci::from(((firstByte & 0x1F) << 16) | secondThirdBytes));
|
||||
}
|
||||
Err(Exceptions::format_with("ParseECIValue: invalid value"))
|
||||
}
|
||||
|
||||
/**
|
||||
* QR codes encode mode indicators and terminator codes into a constant bit length of 4.
|
||||
* Micro QR codes have terminator codes that vary in bit length but are always longer than
|
||||
* the mode indicators.
|
||||
* M1 - 0 length mode code, 3 bits terminator code
|
||||
* M2 - 1 bit mode code, 5 bits terminator code
|
||||
* M3 - 2 bit mode code, 7 bits terminator code
|
||||
* M4 - 3 bit mode code, 9 bits terminator code
|
||||
* IsTerminator peaks into the bit stream to see if the current position is at the start of
|
||||
* a terminator code. If true, then the decoding can finish. If false, then the decoding
|
||||
* can read off the next mode code.
|
||||
*
|
||||
* See ISO 18004:2015, 7.4.1 Table 2
|
||||
*
|
||||
* @param bits the stream of bits that might have a terminator code
|
||||
* @param version the QR or micro QR code version
|
||||
*/
|
||||
pub fn IsEndOfStream(bits: &mut BitSource, version: &Version) -> Result<bool> {
|
||||
let bitsRequired = Mode::get_terminator_bit_length(version); //super::qr_codec_mode::TerminatorBitsLength(version);
|
||||
let bitsAvailable = std::cmp::min(bits.available(), bitsRequired as usize);
|
||||
Ok(bitsAvailable == 0 || bits.peak_bits(bitsAvailable)? == 0)
|
||||
}
|
||||
|
||||
/**
|
||||
* <p>QR Codes can encode text as bits in one of several modes, and can use multiple modes
|
||||
* in one QR Code. This method decodes the bits back into text.</p>
|
||||
*
|
||||
* <p>See ISO 18004:2006, 6.4.3 - 6.4.7</p>
|
||||
*/
|
||||
// ZXING_EXPORT_TEST_ONLY
|
||||
// DecoderResult DecodeBitStream(ByteArray&& bytes, const Version& version, ErrorCorrectionLevel ecLevel)
|
||||
// {
|
||||
// BitSource bits(bytes);
|
||||
// Content result;
|
||||
// Error error;
|
||||
// result.symbology = {'Q', '1', 1};
|
||||
// StructuredAppendInfo structuredAppend;
|
||||
// const int modeBitLength = CodecModeBitsLength(version);
|
||||
pub fn DecodeBitStream(
|
||||
bytes: &[u8],
|
||||
version: &Version,
|
||||
ecLevel: ErrorCorrectionLevel,
|
||||
) -> Result<DecoderResult<bool>> {
|
||||
let mut bits = BitSource::new(bytes.to_vec());
|
||||
let mut result = ECIStringBuilder::default();
|
||||
// Error error;
|
||||
result.symbology = SymbologyIdentifier {
|
||||
code: b'Q',
|
||||
modifier: b'1',
|
||||
eciModifierOffset: 1,
|
||||
aiFlag: AIFlag::None,
|
||||
}; //{'Q', '1', 1};
|
||||
let mut structuredAppend = StructuredAppendInfo::default();
|
||||
let modeBitLength = Mode::get_codec_mode_bits_length(version);
|
||||
|
||||
// try
|
||||
// {
|
||||
// while(!IsEndOfStream(bits, version)) {
|
||||
// CodecMode mode;
|
||||
// if (modeBitLength == 0)
|
||||
// mode = CodecMode::NUMERIC; // MicroQRCode version 1 is always NUMERIC and modeBitLength is 0
|
||||
// else
|
||||
// mode = CodecModeForBits(bits.readBits(modeBitLength), version.isMicroQRCode());
|
||||
let res = (|| {
|
||||
while (!IsEndOfStream(&mut bits, version)?) {
|
||||
let mode: Mode;
|
||||
if (modeBitLength == 0) {
|
||||
mode = Mode::NUMERIC; // MicroQRCode version 1 is always NUMERIC and modeBitLength is 0
|
||||
} else {
|
||||
mode = Mode::CodecModeForBits(
|
||||
bits.readBits(modeBitLength as usize)?,
|
||||
Some(version.isMicroQRCode()),
|
||||
);
|
||||
}
|
||||
|
||||
// switch (mode) {
|
||||
// case CodecMode::FNC1_FIRST_POSITION:
|
||||
// // if (!result.empty()) // uncomment to enforce specification
|
||||
// // throw FormatError("GS1 Indicator (FNC1 in first position) at illegal position");
|
||||
// result.symbology.modifier = '3';
|
||||
// result.symbology.aiFlag = AIFlag::GS1; // In Alphanumeric mode undouble doubled '%' and treat single '%' as <GS>
|
||||
// break;
|
||||
// case CodecMode::FNC1_SECOND_POSITION:
|
||||
// if (!result.empty())
|
||||
// throw FormatError("AIM Application Indicator (FNC1 in second position) at illegal position");
|
||||
// result.symbology.modifier = '5'; // As above
|
||||
// // ISO/IEC 18004:2015 7.4.8.3 AIM Application Indicator (FNC1 in second position), "00-99" or "A-Za-z"
|
||||
// if (int appInd = bits.readBits(8); appInd < 100) // "00-09"
|
||||
// result += ZXing::ToString(appInd, 2);
|
||||
// else if ((appInd >= 165 && appInd <= 190) || (appInd >= 197 && appInd <= 222)) // "A-Za-z"
|
||||
// result += narrow_cast<uint8_t>(appInd - 100);
|
||||
// else
|
||||
// throw FormatError("Invalid AIM Application Indicator");
|
||||
// result.symbology.aiFlag = AIFlag::AIM; // see also above
|
||||
// break;
|
||||
// case CodecMode::STRUCTURED_APPEND:
|
||||
// // sequence number and parity is added later to the result metadata
|
||||
// // Read next 4 bits of index, 4 bits of symbol count, and 8 bits of parity data, then continue
|
||||
// structuredAppend.index = bits.readBits(4);
|
||||
// structuredAppend.count = bits.readBits(4) + 1;
|
||||
// structuredAppend.id = std::to_string(bits.readBits(8));
|
||||
// break;
|
||||
// case CodecMode::ECI:
|
||||
// // Count doesn't apply to ECI
|
||||
// result.switchEncoding(ParseECIValue(bits));
|
||||
// break;
|
||||
// case CodecMode::HANZI: {
|
||||
// // First handle Hanzi mode which does not start with character count
|
||||
// // chinese mode contains a sub set indicator right after mode indicator
|
||||
// if (int subset = bits.readBits(4); subset != 1) // GB2312_SUBSET is the only supported one right now
|
||||
// throw FormatError("Unsupported HANZI subset");
|
||||
// int count = bits.readBits(CharacterCountBits(mode, version));
|
||||
// DecodeHanziSegment(bits, count, result);
|
||||
// break;
|
||||
// }
|
||||
// default: {
|
||||
// // "Normal" QR code modes:
|
||||
// // How many characters will follow, encoded in this mode?
|
||||
// int count = bits.readBits(CharacterCountBits(mode, version));
|
||||
// switch (mode) {
|
||||
// case CodecMode::NUMERIC: DecodeNumericSegment(bits, count, result); break;
|
||||
// case CodecMode::ALPHANUMERIC: DecodeAlphanumericSegment(bits, count, result); break;
|
||||
// case CodecMode::BYTE: DecodeByteSegment(bits, count, result); break;
|
||||
// case CodecMode::KANJI: DecodeKanjiSegment(bits, count, result); break;
|
||||
// default: throw FormatError("Invalid CodecMode");
|
||||
// }
|
||||
// break;
|
||||
// }
|
||||
// }
|
||||
// }
|
||||
// } catch (std::out_of_range& e) { // see BitSource::readBits
|
||||
// error = FormatError("Truncated bit stream");
|
||||
// } catch (Error e) {
|
||||
// error = std::move(e);
|
||||
// }
|
||||
match (mode) {
|
||||
Mode::FNC1_FIRST_POSITION => {
|
||||
// if (!result.empty()) // uncomment to enforce specification
|
||||
// throw FormatError("GS1 Indicator (FNC1 in first position) at illegal position");
|
||||
result.symbology.modifier = b'3';
|
||||
result.symbology.aiFlag = AIFlag::GS1; // In Alphanumeric mode undouble doubled '%' and treat single '%' as <GS>
|
||||
}
|
||||
Mode::FNC1_SECOND_POSITION => {
|
||||
if (!result.is_empty()) {
|
||||
return Err(Exceptions::format_with("AIM Application Indicator (FNC1 in second position) at illegal position"));
|
||||
// throw FormatError("AIM Application Indicator (FNC1 in second position) at illegal position");
|
||||
}
|
||||
result.symbology.modifier = b'5'; // As above
|
||||
// ISO/IEC 18004:2015 7.4.8.3 AIM Application Indicator (FNC1 in second position), "00-99" or "A-Za-z"
|
||||
let appInd = bits.readBits(8)?;
|
||||
if (appInd < 100)
|
||||
// "00-09"
|
||||
{
|
||||
result +=
|
||||
crate::common::cpp_essentials::util::ToString(appInd as usize, 2)?;
|
||||
} else if ((appInd >= 165 && appInd <= 190) || (appInd >= 197 && appInd <= 222))
|
||||
// "A-Za-z"
|
||||
{
|
||||
result += (appInd - 100) as u8;
|
||||
} else {
|
||||
return Err(Exceptions::format_with("Invalid AIM Application Indicator"));
|
||||
// throw FormatError("Invalid AIM Application Indicator");
|
||||
}
|
||||
result.symbology.aiFlag = AIFlag::AIM; // see also above
|
||||
}
|
||||
Mode::STRUCTURED_APPEND => {
|
||||
// sequence number and parity is added later to the result metadata
|
||||
// Read next 4 bits of index, 4 bits of symbol count, and 8 bits of parity data, then continue
|
||||
structuredAppend.index = bits.readBits(4)? as i32;
|
||||
structuredAppend.count = bits.readBits(4)? as i32 + 1;
|
||||
structuredAppend.id = (bits.readBits(8)?).to_string(); //std::to_string(bits.readBits(8));
|
||||
}
|
||||
Mode::ECI => {
|
||||
// Count doesn't apply to ECI
|
||||
result.switch_encoding(ParseECIValue(&mut bits)?.into());
|
||||
}
|
||||
Mode::HANZI => {
|
||||
// First handle Hanzi mode which does not start with character count
|
||||
// chinese mode contains a sub set indicator right after mode indicator
|
||||
let subset = bits.readBits(4)?;
|
||||
if (subset != 1)
|
||||
// GB2312_SUBSET is the only supported one right now
|
||||
{
|
||||
return Err(Exceptions::format_with("Unsupported HANZI subset"));
|
||||
// throw FormatError("Unsupported HANZI subset");
|
||||
}
|
||||
let count = bits.readBits(mode.CharacterCountBits(version) as usize)?;
|
||||
DecodeHanziSegment(&mut bits, count, &mut result);
|
||||
}
|
||||
_ => {
|
||||
// "Normal" QR code modes:
|
||||
// How many characters will follow, encoded in this mode?
|
||||
let count = bits.readBits(mode.CharacterCountBits(version) as usize)?;
|
||||
match (mode) {
|
||||
Mode::NUMERIC => DecodeNumericSegment(&mut bits, count, &mut result),
|
||||
Mode::ALPHANUMERIC => {
|
||||
DecodeAlphanumericSegment(&mut bits, count, &mut result)
|
||||
}
|
||||
Mode::BYTE => DecodeByteSegment(&mut bits, count, &mut result),
|
||||
Mode::KANJI => DecodeKanjiSegment(&mut bits, count, &mut result),
|
||||
_ => return Err(Exceptions::format_with("Invalid CodecMode")), //throw FormatError("Invalid CodecMode");
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
})();
|
||||
// } catch (std::out_of_range& e) { // see BitSource::readBits
|
||||
// error = FormatError("Truncated bit stream");
|
||||
// } catch (Error e) {
|
||||
// error = std::move(e);
|
||||
// }
|
||||
|
||||
// return DecoderResult(std::move(result))
|
||||
// .setError(std::move(error))
|
||||
// .setEcLevel(ToString(ecLevel))
|
||||
// .setVersionNumber(version.versionNumber())
|
||||
// .setStructuredAppend(structuredAppend);
|
||||
// }
|
||||
Ok(DecoderResult::with_eci_string_builder(result)
|
||||
.withEcLevel(ecLevel.to_string())
|
||||
.withVersionNumber(version.getVersionNumber())
|
||||
.withStructuredAppend(structuredAppend))
|
||||
|
||||
// DecoderResult Decode(const BitMatrix& bits)
|
||||
// {
|
||||
// const Version* pversion = ReadVersion(bits);
|
||||
// if (!pversion)
|
||||
// return FormatError("Invalid version");
|
||||
// const Version& version = *pversion;
|
||||
// return DecoderResult(std::move(result))
|
||||
// .setError(std::move(error))
|
||||
// .setEcLevel(ToString(ecLevel))
|
||||
// .setVersionNumber(version.versionNumber())
|
||||
// .setStructuredAppend(structuredAppend);
|
||||
}
|
||||
|
||||
// auto formatInfo = ReadFormatInformation(bits, version.isMicroQRCode());
|
||||
// if (!formatInfo.isValid())
|
||||
// return FormatError("Invalid format information");
|
||||
pub fn Decode(bits: &BitMatrix) -> Result<DecoderResult<bool>> {
|
||||
let Ok(pversion) = ReadVersion(bits) else {
|
||||
return Err(Exceptions::format_with("Invalid version"))
|
||||
};
|
||||
let version = pversion;
|
||||
|
||||
// // Read codewords
|
||||
// ByteArray codewords = ReadCodewords(bits, version, formatInfo);
|
||||
// if (codewords.empty())
|
||||
// return FormatError("Failed to read codewords");
|
||||
let Ok(formatInfo) = ReadFormatInformation(bits, version.isMicroQRCode()) else {
|
||||
return Err(Exceptions::format_with("Invalid format information"))
|
||||
};
|
||||
|
||||
// // Separate into data blocks
|
||||
// std::vector<DataBlock> dataBlocks = DataBlock::GetDataBlocks(codewords, version, formatInfo.ecLevel);
|
||||
// if (dataBlocks.empty())
|
||||
// return FormatError("Failed to get data blocks");
|
||||
// Read codewords
|
||||
let codewords = ReadCodewords(bits, &version, &formatInfo)?;
|
||||
if (codewords.is_empty()) {
|
||||
return Err(Exceptions::format_with("Failed to read codewords"));
|
||||
}
|
||||
|
||||
// // Count total number of data bytes
|
||||
// const auto op = [](auto totalBytes, const auto& dataBlock){ return totalBytes + dataBlock.numDataCodewords();};
|
||||
// const auto totalBytes = std::accumulate(std::begin(dataBlocks), std::end(dataBlocks), int{}, op);
|
||||
// ByteArray resultBytes(totalBytes);
|
||||
// auto resultIterator = resultBytes.begin();
|
||||
// Separate into data blocks
|
||||
let dataBlocks: Vec<DataBlock> =
|
||||
DataBlock::getDataBlocks(&codewords, &version, formatInfo.error_correction_level)?;
|
||||
if (dataBlocks.is_empty()) {
|
||||
return Err(Exceptions::format_with("Failed to get data blocks"));
|
||||
}
|
||||
|
||||
// // Error-correct and copy data blocks together into a stream of bytes
|
||||
// for (auto& dataBlock : dataBlocks)
|
||||
// {
|
||||
// ByteArray& codewordBytes = dataBlock.codewords();
|
||||
// int numDataCodewords = dataBlock.numDataCodewords();
|
||||
// Count total number of data bytes
|
||||
let op = |totalBytes, dataBlock: &DataBlock| totalBytes + dataBlock.getNumDataCodewords();
|
||||
let totalBytes = dataBlocks.iter().fold(0, op); // std::accumulate(std::begin(dataBlocks), std::end(dataBlocks), int{}, op);
|
||||
let mut resultBytes = vec![0u8; totalBytes as usize];
|
||||
let mut resultIterator = 0; //resultBytes.begin();
|
||||
|
||||
// if (!CorrectErrors(codewordBytes, numDataCodewords))
|
||||
// return ChecksumError();
|
||||
// Error-correct and copy data blocks together into a stream of bytes
|
||||
for dataBlock in dataBlocks.iter() {
|
||||
let mut codewordBytes = dataBlock.getCodewords().to_vec();
|
||||
let numDataCodewords = dataBlock.getNumDataCodewords() as usize;
|
||||
|
||||
// resultIterator = std::copy_n(codewordBytes.begin(), numDataCodewords, resultIterator);
|
||||
// }
|
||||
if (!CorrectErrors(&mut codewordBytes, numDataCodewords as u32)?) {
|
||||
return Err(Exceptions::CHECKSUM);
|
||||
}
|
||||
|
||||
// // Decode the contents of that stream of bytes
|
||||
// return DecodeBitStream(std::move(resultBytes), version, formatInfo.ecLevel).setIsMirrored(formatInfo.isMirrored);
|
||||
// }
|
||||
// resultIterator = std::copy_n(codewordBytes.begin(), numDataCodewords, resultIterator);
|
||||
resultBytes[resultIterator..numDataCodewords]
|
||||
.copy_from_slice(&codewordBytes[..numDataCodewords]);
|
||||
resultIterator += numDataCodewords;
|
||||
}
|
||||
|
||||
// Decode the contents of that stream of bytes
|
||||
Ok(
|
||||
DecodeBitStream(&resultBytes, &version, formatInfo.error_correction_level)?
|
||||
.withIsMirrored(formatInfo.isMirrored),
|
||||
)
|
||||
}
|
||||
|
||||
// } // namespace ZXing::QRCode
|
||||
|
||||
Reference in New Issue
Block a user