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rxing/src/datamatrix/encoder/minimal_encoder.rs
Henry Schimke 48287631dd Implement clippy suggestions
2023-01-04 14:48:16 -06:00

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/*
* Copyright 2021 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 std::{fmt, rc::Rc};
use encoding::{self, EncodingRef};
use crate::{
common::{ECIInput, MinimalECIInput},
Exceptions,
};
use super::{high_level_encoder, SymbolShapeHint};
const ISO_8859_1_ENCODER: EncodingRef = encoding::all::ISO_8859_1;
/**
* Encoder that encodes minimally
*
* Algorithm:
*
* Uses Dijkstra to produce mathematically minimal encodings that are in some cases smaller than the results produced
* by the algorithm described in annex S in the specification ISO/IEC 16022:200(E). The biggest improvment of this
* algorithm over that one is the case when the algorithm enters the most inefficient mode, the B256 Mode:: The
* algorithm from the specification algorithm will exit this mode only if it encounters digits so that arbitrarily
* inefficient results can be produced if the postfix contains no digits.
*
* Multi ECI support and ECI switching:
*
* For multi language content the algorithm selects the most compact representation using ECI modes. Note that unlike
* the compaction algorithm used for QR-Codes, this implementation operates in two stages and therfore is not
* mathematically optimal. In the first stage, the input string is encoded minimally as a stream of ECI character set
* selectors and bytes encoded in the selected encoding. In this stage the algorithm might for example decide to
* encode ocurrences of the characters "\u0150\u015C" (O-double-acute, S-circumflex) in UTF-8 by a single ECI or
* alternatively by multiple ECIs that switch between IS0-8859-2 and ISO-8859-3 (e.g. in the case that the input
* contains many * characters from ISO-8859-2 (Latin 2) and few from ISO-8859-3 (Latin 3)).
* In a second stage this stream of ECIs and bytes is minimally encoded using the various Data Matrix encoding modes.
* While both stages encode mathematically minimally it is not ensured that the result is mathematically minimal since
* the size growth for inserting an ECI in the first stage can only be approximated as the first stage does not know
* in which mode the ECI will occur in the second stage (may, or may not require an extra latch to ASCII depending on
* the current mode). The reason for this shortcoming are difficulties in implementing it in a straightforward and
* readable manner.
*
* GS1 support
*
* FNC1 delimiters can be encoded in the input string by using the FNC1 character specified in the encoding function.
* When a FNC1 character is specified then a leading FNC1 will be encoded and all ocurrences of delimiter characters
* while result in FNC1 codewords in the symbol.
*
* @author Alex Geller
*/
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
enum Mode {
Ascii,
C40,
Text,
X12,
Edf,
B256,
}
impl Mode {
pub fn ordinal(&self) -> usize {
match self {
Mode::Ascii => 0,
Mode::C40 => 1,
Mode::Text => 2,
Mode::X12 => 3,
Mode::Edf => 4,
Mode::B256 => 5,
}
}
}
const C40_SHIFT2_CHARS: [char; 27] = [
'!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', ':', ';', '<', '=',
'>', '?', '@', '[', '\\', ']', '^', '_',
];
pub fn isExtendedASCII(ch: char, fnc1: Option<char>) -> bool {
let is_fnc1 = if let Some(fnc1) = fnc1 {
ch != fnc1
} else {
true
};
is_fnc1 && ch as u8 >= 128 //&& ch as u8 <= 255
// return ch != fnc1 && ch as u8 >= 128 && ch as u8 <= 255;
}
fn isInC40Shift1Set(ch: char) -> bool {
ch as u8 <= 31
}
fn isInC40Shift2Set(ch: char, fnc1: Option<char>) -> bool {
for c40Shift2Char in C40_SHIFT2_CHARS {
// for (char c40Shift2Char : C40_SHIFT2_CHARS) {
if c40Shift2Char == ch {
return true;
}
}
if let Some(fnc1) = fnc1 {
ch == fnc1
} else {
false
}
// return ch as u8 as i32 == fnc1;
}
fn isInTextShift1Set(ch: char) -> bool {
isInC40Shift1Set(ch)
}
fn isInTextShift2Set(ch: char, fnc1: Option<char>) -> bool {
isInC40Shift2Set(ch, fnc1)
}
/**
* Performs message encoding of a DataMatrix message
*
* @param msg the message
* @return the encoded message (the char values range from 0 to 255)
*/
pub fn encodeHighLevel(msg: &str) -> Result<String, Exceptions> {
encodeHighLevelWithDetails(msg, None, None, SymbolShapeHint::FORCE_NONE)
}
/**
* Performs message encoding of a DataMatrix message
*
* @param msg the message
* @param priorityCharset The preferred {@link Charset}. When the value of the argument is null, the algorithm
* chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
* charset to encode any character in the input that can be encoded by it if the charset is among the
* supported charsets.
* @param fnc1 denotes the character in the input that represents the FNC1 character or -1 if this is not a GS1
* bar code. If the value is not -1 then a FNC1 is also prepended.
* @param shape requested shape.
* @return the encoded message (the char values range from 0 to 255)
*/
pub fn encodeHighLevelWithDetails(
msg: &str,
priorityCharset: Option<EncodingRef>,
fnc1: Option<char>,
shape: SymbolShapeHint,
) -> Result<String, Exceptions> {
let mut msg = msg;
let mut macroId = 0;
if msg.starts_with(high_level_encoder::MACRO_05_HEADER)
&& msg.ends_with(high_level_encoder::MACRO_TRAILER)
{
macroId = 5;
// msg = msg.substring(high_level_encoder::MACRO_05_HEADER.len(), msg.len() - 2);
msg = &msg[high_level_encoder::MACRO_05_HEADER.chars().count()..(msg.chars().count() - 2)];
} else if msg.starts_with(high_level_encoder::MACRO_06_HEADER)
&& msg.ends_with(high_level_encoder::MACRO_TRAILER)
{
macroId = 6;
// msg = msg.substring(high_level_encoder::MACRO_06_HEADER.len(), msg.len() - 2);
msg = &msg[high_level_encoder::MACRO_06_HEADER.chars().count()..(msg.chars().count() - 2)];
}
Ok(ISO_8859_1_ENCODER
.decode(
&encode(msg, priorityCharset, fnc1, shape, macroId)?,
encoding::DecoderTrap::Strict,
)
.expect("should decode"))
// return new String(encode(msg, priorityCharset, fnc1, shape, macroId), StandardCharsets.ISO_8859_1);
}
/**
* Encodes input minimally and returns an array of the codewords
*
* @param input The string to encode
* @param priorityCharset The preferred {@link Charset}. When the value of the argument is null, the algorithm
* chooses charsets that leads to a minimal representation. Otherwise the algorithm will use the priority
* charset to encode any character in the input that can be encoded by it if the charset is among the
* supported charsets.
* @param fnc1 denotes the character in the input that represents the FNC1 character or -1 if this is not a GS1
* bar code. If the value is not -1 then a FNC1 is also prepended.
* @param shape requested shape.
* @param macroId Prepends the specified macro function in case that a value of 5 or 6 is specified.
* @return An array of bytes representing the codewords of a minimal encoding.
*/
fn encode(
input: &str,
priorityCharset: Option<EncodingRef>,
fnc1: Option<char>,
shape: SymbolShapeHint,
macroId: i32,
) -> Result<Vec<u8>, Exceptions> {
Ok(encodeMinimally(Rc::new(Input::new(
input,
priorityCharset,
fnc1,
shape,
macroId,
)))?
.getBytes()
.to_vec())
}
fn addEdge(edges: &mut [Vec<Option<Rc<Edge>>>], edge: Rc<Edge>) -> Result<(), Exceptions> {
let vertexIndex = (edge.fromPosition + edge.characterLength) as usize;
if edges[vertexIndex][edge.getEndMode()?.ordinal()].is_none()
|| edges[vertexIndex][edge.getEndMode()?.ordinal()]
.as_ref()
.unwrap()
.cachedTotalSize
> edge.cachedTotalSize
{
edges[vertexIndex][edge.getEndMode()?.ordinal()] = Some(edge.clone());
}
Ok(())
}
/** @return the number of words in which the string starting at from can be encoded in c40 or text Mode::
* The number of characters encoded is returned in characterLength.
* The number of characters encoded is also minimal in the sense that the algorithm stops as soon
* as a character encoding fills a C40 word competely (three C40 values). An exception is at the
* end of the string where two C40 values are allowed (according to the spec the third c40 value
* is filled with 0 (Shift 1) in this case).
*/
fn getNumberOfC40Words(
input: Rc<Input>,
from: u32,
c40: bool,
characterLength: &mut [u32],
) -> Result<u32, Exceptions> {
let mut thirdsCount = 0;
for i in (from as usize)..input.length() {
// for (int i = from; i < input.length(); i++) {
if input.isECI(i as u32)? {
characterLength[0] = 0;
return Ok(0);
}
let ci = input.charAt(i)?;
if c40 && high_level_encoder::isNativeC40(ci)
|| !c40 && high_level_encoder::isNativeText(ci)
{
thirdsCount += 1; //native
} else if !isExtendedASCII(ci, input.getFNC1Character()) {
thirdsCount += 2; //shift
} else {
let asciiValue = ci as u8;
if asciiValue >= 128
&& (c40 && high_level_encoder::isNativeC40((asciiValue - 128) as char)
|| !c40 && high_level_encoder::isNativeText((asciiValue - 128) as char))
{
thirdsCount += 3; // shift, Upper shift
} else {
thirdsCount += 4; // shift, Upper shift, shift
}
}
if thirdsCount % 3 == 0 || ((thirdsCount - 2) % 3 == 0 && i + 1 == input.length()) {
characterLength[0] = i as u32 - from + 1;
// return (int) Math.ceil(((double) thirdsCount) / 3.0);
return Ok(((thirdsCount as f64) / 3.0).ceil() as u32);
}
}
characterLength[0] = 0;
Ok(0)
}
fn addEdges(
input: Rc<Input>,
edges: &mut [Vec<Option<Rc<Edge>>>],
from: u32,
previous: Option<Rc<Edge>>,
) -> Result<(), Exceptions> {
if input.isECI(from)? {
addEdge(
edges,
Rc::new(Edge::new(input, Mode::Ascii, from, 1, previous)?),
)?;
return Ok(());
}
let ch = input.charAt(from as usize)?;
if previous.is_none() || previous.as_ref().unwrap().getEndMode()? != Mode::Edf {
//not possible to unlatch a full EDF edge to something
//else
if high_level_encoder::isDigit(ch)
&& input.haveNCharacters(from as usize, 2)
&& high_level_encoder::isDigit(input.charAt(from as usize + 1)?)
{
// two digits ASCII encoded
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
Mode::Ascii,
from,
2,
previous.clone(),
)?),
)?;
} else {
// one ASCII encoded character or an extended character via Upper Shift
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
Mode::Ascii,
from,
1,
previous.clone(),
)?),
)?;
}
let modes = [Mode::C40, Mode::Text];
for mode in modes {
// for (Mode mode : modes) {
let mut characterLength = [0u32; 1];
if getNumberOfC40Words(input.clone(), from, mode == Mode::C40, &mut characterLength)?
> 0
{
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
mode,
from,
characterLength[0],
previous.clone(),
)?),
)?;
}
}
if input.haveNCharacters(from as usize, 3)
&& high_level_encoder::isNativeX12(input.charAt(from as usize)?)
&& high_level_encoder::isNativeX12(input.charAt(from as usize + 1)?)
&& high_level_encoder::isNativeX12(input.charAt(from as usize + 2)?)
{
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
Mode::X12,
from,
3,
previous.clone(),
)?),
)?;
}
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
Mode::B256,
from,
1,
previous.clone(),
)?),
)?;
}
//We create 4 EDF edges, with 1, 2 3 or 4 characters length. The fourth normally doesn't have a latch to ASCII
//unless it is 2 characters away from the end of the input.
let mut i = 0u32;
while i < 3 {
// for (i = 0; i < 3; i++) {
let pos = from + i;
if input.haveNCharacters(pos as usize, 1)
&& high_level_encoder::isNativeEDIFACT(input.charAt(pos as usize)?)
{
addEdge(
edges,
Rc::new(Edge::new(
input.clone(),
Mode::Edf,
from,
i + 1,
previous.clone(),
)?),
)?;
} else {
break;
}
i += 1;
}
if i == 3
&& input.haveNCharacters(from as usize, 4)
&& high_level_encoder::isNativeEDIFACT(input.charAt(from as usize + 3)?)
{
addEdge(
edges,
Rc::new(Edge::new(input, Mode::Edf, from, 4, previous)?),
)?;
}
Ok(())
}
fn encodeMinimally(input: Rc<Input>) -> Result<RXingResult, Exceptions> {
// @SuppressWarnings("checkstyle:lineLength")
/* The minimal encoding is computed by Dijkstra. The acyclic graph is modeled as follows:
* A vertex represents a combination of a position in the input and an encoding mode where position 0
* denotes the position left of the first character, 1 the position left of the second character and so on.
* Likewise the end vertices are located after the last character at position input.length().
* For any position there might be up to six vertices, one for each of the encoding types ASCII, C40, TEXT, X12,
* EDF and B256.
*
* As an example consider the input string "ABC123" then at position 0 there is only one vertex with the default
* ASCII encodation. At position 3 there might be vertices for the types ASCII, C40, X12, EDF and B256.
*
* An edge leading to such a vertex encodes one or more of the characters left of the position that the vertex
* represents. It encodes the characters in the encoding mode of the vertex that it ends on. In other words,
* all edges leading to a particular vertex encode the same characters (the length of the suffix can vary) using the same
* encoding Mode::
* As an example consider the input string "ABC123" and the vertex (4,EDF). Possible edges leading to this vertex
* are:
* (0,ASCII) --EDF(ABC1)--> (4,EDF)
* (1,ASCII) --EDF(BC1)--> (4,EDF)
* (1,B256) --EDF(BC1)--> (4,EDF)
* (1,EDF) --EDF(BC1)--> (4,EDF)
* (2,ASCII) --EDF(C1)--> (4,EDF)
* (2,B256) --EDF(C1)--> (4,EDF)
* (2,EDF) --EDF(C1)--> (4,EDF)
* (3,ASCII) --EDF(1)--> (4,EDF)
* (3,B256) --EDF(1)--> (4,EDF)
* (3,EDF) --EDF(1)--> (4,EDF)
* (3,C40) --EDF(1)--> (4,EDF)
* (3,X12) --EDF(1)--> (4,EDF)
*
* The edges leading to a vertex are stored in such a way that there is a fast way to enumerate the edges ending
* on a particular vertex.
*
* The algorithm processes the vertices in order of their position thereby performing the following:
*
* For every vertex at position i the algorithm enumerates the edges ending on the vertex and removes all but the
* shortest from that list.
* Then it processes the vertices for the position i+1. If i+1 == input.length() then the algorithm ends
* and chooses the the edge with the smallest size from any of the edges leading to vertices at this position.
* Otherwise the algorithm computes all possible outgoing edges for the vertices at the position i+1
*
* Examples:
* The process is illustrated by showing the graph (edges) after each iteration from left to right over the input:
* An edge is drawn as follows "(" + fromVertex + ") -- " + encodingMode + "(" + encodedInput + ") (" +
* accumulatedSize + ") --> (" + toVertex + ")"
*
* Example 1 encoding the string "ABCDEFG":
*
*
* Situation after adding edges to the start vertex (0,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
*
* Situation after adding edges to vertices at position 1
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) B256(B) (4) --> (2,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BC) (5) --> (3,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCD) (5) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) ASCII(B) (4) --> (2,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BC) (6) --> (3,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) C40(BCD) (5) --> (4,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) TEXT(BCD) (7) --> (4,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) X12(BCD) (5) --> (4,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCDE) (6) --> (5,EDF)
*
* Edge "(1,ASCII) ASCII(B) (2) --> (2,ASCII)" is minimal for the vertex (2,ASCII) so that edge "(1,B256) ASCII(B) (4) --> (2,ASCII)" is removed.
* Edge "(1,B256) B256(B) (3) --> (2,B256)" is minimal for the vertext (2,B256) so that the edge "(1,ASCII) B256(B) (4) --> (2,B256)" is removed.
*
* Situation after adding edges to vertices at position 2
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BC) (5) --> (3,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCD) (5) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BC) (6) --> (3,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) C40(BCD) (5) --> (4,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) TEXT(BCD) (7) --> (4,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) X12(BCD) (5) --> (4,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) EDF(BCDE) (6) --> (5,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) ASCII(C) (5) --> (3,ASCII)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) B256(C) (6) --> (3,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CD) (7) --> (4,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) C40(CDE) (6) --> (5,C40)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) TEXT(CDE) (8) --> (5,TEXT)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) X12(CDE) (6) --> (5,X12)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CDE) (7) --> (5,EDF)
* (0,ASCII) EDF(AB) (4) --> (2,EDF) EDF(CDEF) (7) --> (6,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) B256(C) (5) --> (3,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CD) (6) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) C40(CDE) (5) --> (5,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) X12(CDE) (5) --> (5,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDE) (6) --> (5,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDEF) (6) --> (6,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) ASCII(C) (4) --> (3,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CD) (6) --> (4,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) C40(CDE) (5) --> (5,C40)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) X12(CDE) (5) --> (5,X12)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CDE) (6) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) EDF(CDEF) (6) --> (6,EDF)
*
* Edge "(2,ASCII) ASCII(C) (3) --> (3,ASCII)" is minimal for the vertex (3,ASCII) so that edges "(2,EDF) ASCII(C) (5) --> (3,ASCII)"
* and "(2,B256) ASCII(C) (4) --> (3,ASCII)" can be removed.
* Edge "(0,ASCII) EDF(ABC) (4) --> (3,EDF)" is minimal for the vertex (3,EDF) so that edges "(1,ASCII) EDF(BC) (5) --> (3,EDF)"
* and "(1,B256) EDF(BC) (6) --> (3,EDF)" can be removed.
* Edge "(2,B256) B256(C) (4) --> (3,B256)" is minimal for the vertex (3,B256) so that edges "(2,ASCII) B256(C) (5) --> (3,B256)"
* and "(2,EDF) B256(C) (6) --> (3,B256)" can be removed.
*
* This continues for vertices 3 thru 7
*
* Situation after adding edges to vertices at position 7
* (0,ASCII) ASCII(A) (1) --> (1,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256)
* (0,ASCII) EDF(AB) (4) --> (2,EDF)
* (0,ASCII) C40(ABC) (3) --> (3,C40)
* (0,ASCII) TEXT(ABC) (5) --> (3,TEXT)
* (0,ASCII) X12(ABC) (3) --> (3,X12)
* (0,ASCII) EDF(ABC) (4) --> (3,EDF)
* (0,ASCII) EDF(ABCD) (4) --> (4,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) TEXT(BCD) (6) --> (4,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) EDF(BCDE) (5) --> (5,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256)
* (0,ASCII) C40(ABC) (3) --> (3,C40) C40(DEF) (5) --> (6,C40)
* (0,ASCII) X12(ABC) (3) --> (3,X12) X12(DEF) (5) --> (6,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) C40(CDE) (5) --> (5,C40)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) TEXT(CDE) (7) --> (5,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) X12(CDE) (5) --> (5,X12)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) EDF(CDEF) (6) --> (6,EDF)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) C40(BCD) (4) --> (4,C40) C40(EFG) (6) --> (7,C40) //Solution 1
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) X12(BCD) (4) --> (4,X12) X12(EFG) (6) --> (7,X12) //Solution 2
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) TEXT(DEF) (8) --> (6,TEXT)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) EDF(DEFG) (7) --> (7,EDF)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) TEXT(EFG) (9) --> (7,TEXT)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII) ASCII(F) (6) --> (6,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256) B256(F) (7) --> (6,B256)
* (0,ASCII) ASCII(A) (1) --> (1,ASCII) ASCII(B) (2) --> (2,ASCII) ASCII(C) (3) --> (3,ASCII) ASCII(D) (4) --> (4,ASCII) ASCII(E) (5) --> (5,ASCII) ASCII(F) (6) --> (6,ASCII) ASCII(G) (7) --> (7,ASCII)
* (0,ASCII) B256(A) (3) --> (1,B256) B256(B) (3) --> (2,B256) B256(C) (4) --> (3,B256) B256(D) (5) --> (4,B256) B256(E) (6) --> (5,B256) B256(F) (7) --> (6,B256) B256(G) (8) --> (7,B256)
*
* Hence a minimal encoding of "ABCDEFG" is either ASCII(A),C40(BCDEFG) or ASCII(A), X12(BCDEFG) with a size of 5 bytes.
*/
let inputLength = input.length();
// Array that represents vertices. There is a vertex for every character and Mode::
// The last dimension in the array below encodes the 6 modes ASCII, C40, TEXT, X12, EDF and B256
// let edges = new Edge[inputLength + 1][6];
let mut edges = vec![vec![None; 6]; inputLength + 1];
addEdges(input.clone(), &mut edges, 0, None)?;
for i in 1..=inputLength {
// for (int i = 1; i <= inputLength; i++) {
for j in 0..6 {
// for (int j = 0; j < 6; j++) {
if edges[i][j].is_some() && i < inputLength {
let edge = edges[i][j].clone();
addEdges(input.clone(), &mut edges, i as u32, edge)?;
}
}
//optimize memory by removing edges that have been passed.
for j in 0..6 {
// for (int j = 0; j < 6; j++) {
edges[i - 1][j] = None;
}
}
let mut minimalJ: i32 = -1;
let mut minimalSize = i32::MAX;
for j in 0..6 {
// for (int j = 0; j < 6; j++) {
if edges[inputLength][j].is_some() {
let edge = edges[inputLength][j].as_ref().unwrap();
let size = if (1..=3).contains(&j) {
edge.cachedTotalSize + 1
} else {
edge.cachedTotalSize
}; //C40, TEXT and X12 need an
// extra unlatch at the end
if (size as i32) < minimalSize {
minimalSize = size as i32;
minimalJ = j as i32;
}
}
}
if minimalJ < 0 {
return Err(Exceptions::RuntimeException(Some(format!(
"Internal error: failed to encode \"{}\"",
input
))));
}
RXingResult::new(edges[inputLength][minimalJ as usize].clone())
}
const ALL_CODEWORD_CAPACITIES: [u32; 28] = [
3, 5, 8, 10, 12, 16, 18, 22, 30, 32, 36, 44, 49, 62, 86, 114, 144, 174, 204, 280, 368, 456,
576, 696, 816, 1050, 1304, 1558,
];
const SQUARE_CODEWORD_CAPACITIES: [u32; 24] = [
3, 5, 8, 12, 18, 22, 30, 36, 44, 62, 86, 114, 144, 174, 204, 280, 368, 456, 576, 696, 816,
1050, 1304, 1558,
];
const RECTANGULAR_CODEWORD_CAPACITIES: [u32; 6] = [5, 10, 16, 33, 32, 49];
struct Edge {
input: Rc<Input>,
mode: Mode, //the mode at the start of this edge.
fromPosition: u32,
characterLength: u32,
previous: Option<Rc<Edge>>,
cachedTotalSize: u32,
}
impl Edge {
fn new(
input: Rc<Input>,
mode: Mode,
fromPosition: u32,
characterLength: u32,
previous: Option<Rc<Edge>>,
) -> Result<Self, Exceptions> {
// this.input = input;
// this.mode = mode;
// this.fromPosition = fromPosition;
// this.characterLength = characterLength;
// this.previous = previous;
assert!(fromPosition + characterLength <= input.length() as u32);
let mut size = if let Some(previous) = previous.clone() {
previous.cachedTotalSize
} else {
0
};
let previousMode = Self::getPreviousMode(previous.clone())?;
/*
* Switching modes
* ASCII -> C40: latch 230
* ASCII -> TEXT: latch 239
* ASCII -> X12: latch 238
* ASCII -> EDF: latch 240
* ASCII -> B256: latch 231
* C40 -> ASCII: word(c1,c2,c3), 254
* TEXT -> ASCII: word(c1,c2,c3), 254
* X12 -> ASCII: word(c1,c2,c3), 254
* EDIFACT -> ASCII: Unlatch character,0,0,0 or c1,Unlatch character,0,0 or c1,c2,Unlatch character,0 or
* c1,c2,c3,Unlatch character
* B256 -> ASCII: without latch after n bytes
*/
match mode {
Mode::Ascii => {
size += 1;
if input.isECI(fromPosition).expect("bool")
|| isExtendedASCII(
input
.charAt(fromPosition as usize)
.expect("char must exist)"),
input.getFNC1Character(),
)
{
size += 1;
}
if previousMode == Mode::C40
|| previousMode == Mode::Text
|| previousMode == Mode::X12
{
size += 1; // unlatch 254 to ASCII
}
}
Mode::B256 => {
size += 1;
if previousMode != Mode::B256 || Self::getB256Size(mode, previous.clone()) == 250 {
size += 1; //byte count
}
// } else if Self::getB256Size(mode, previous.clone()) == 250 {
// size += 1; //extra byte count
// }
if previousMode == Mode::Ascii {
size += 1; //latch to B256
} else if previousMode == Mode::C40
|| previousMode == Mode::Text
|| previousMode == Mode::X12
{
size += 2; //unlatch to ASCII, latch to B256
}
}
Mode::C40 | Mode::Text | Mode::X12 => {
if mode == Mode::X12 {
size += 2;
} else {
let mut charLen = [0u32; 1];
size += getNumberOfC40Words(
input.clone(),
fromPosition,
mode == Mode::C40,
&mut charLen,
)
.expect("works")
* 2;
}
if previousMode == Mode::Ascii || previousMode == Mode::B256 {
size += 1; //additional byte for latch from ASCII to this mode
} else if previousMode != mode
&& (previousMode == Mode::C40
|| previousMode == Mode::Text
|| previousMode == Mode::X12)
{
size += 2; //unlatch 254 to ASCII followed by latch to this mode
}
}
Mode::Edf => {
size += 3;
if previousMode == Mode::Ascii || previousMode == Mode::B256 {
size += 1; //additional byte for latch from ASCII to this mode
} else if previousMode == Mode::C40
|| previousMode == Mode::Text
|| previousMode == Mode::X12
{
size += 2; //unlatch 254 to ASCII followed by latch to this mode
}
}
}
Ok(Self {
input,
mode,
fromPosition,
characterLength,
previous,
cachedTotalSize: size,
})
// cachedTotalSize = size;
}
// does not count beyond 250
pub fn getB256Size(mode: Mode, previous: Option<Rc<Edge>>) -> u32 {
if mode != Mode::B256 {
return 0;
}
let mut cnt = 1;
let mut current = previous;
while current.is_some() && current.as_ref().unwrap().mode == Mode::B256 && cnt <= 250 {
cnt += 1;
current = current.clone().as_ref().unwrap().previous.clone();
}
// let cnt = 0;
// Edge current = this;
// while (current != null && current.mode == Mode::B256 && cnt <= 250) {
// cnt+=1;
// current = current.previous;
// }
cnt
}
pub fn getPreviousStartMode(previous: Option<Rc<Edge>>) -> Mode {
if let Some(prev) = previous {
prev.mode
} else {
Mode::Ascii
}
// if previous.is_none() { Mode::ASCII} else {previous.as_ref().unwrap().mode}
}
pub fn getPreviousMode(previous: Option<Rc<Edge>>) -> Result<Mode, Exceptions> {
if let Some(prev) = previous {
prev.getEndMode()
} else {
Ok(Mode::Ascii)
}
// return previous == null ? Mode::ASCII : previous.getEndMode();
}
/** Returns Mode::ASCII in case that:
* - Mode is EDIFACT and characterLength is less than 4 or the remaining characters can be encoded in at most 2
* ASCII bytes.
* - Mode is C40, TEXT or X12 and the remaining characters can be encoded in at most 1 ASCII byte.
* Returns mode in all other cases.
* */
pub fn getEndMode(&self) -> Result<Mode, Exceptions> {
let mode = self.mode;
if mode == Mode::Edf {
if self.characterLength < 4 {
return Ok(Mode::Ascii);
}
let lastASCII = Self::getLastASCII(self)?; // see 5.2.8.2 EDIFACT encodation Rules
if lastASCII > 0
&& self.getCodewordsRemaining(self.cachedTotalSize + lastASCII) <= 2 - lastASCII
{
return Ok(Mode::Ascii);
}
}
if mode == Mode::C40 || mode == Mode::Text || mode == Mode::X12 {
// see 5.2.5.2 C40 encodation rules and 5.2.7.2 ANSI X12 encodation rules
if self.fromPosition + self.characterLength >= self.input.length() as u32
&& self.getCodewordsRemaining(self.cachedTotalSize) == 0
{
return Ok(Mode::Ascii);
}
let lastASCII = Self::getLastASCII(self)?;
if lastASCII == 1 && self.getCodewordsRemaining(self.cachedTotalSize + 1) == 0 {
return Ok(Mode::Ascii);
}
}
Ok(mode)
}
pub fn getMode(&self) -> Mode {
self.mode
}
/** Peeks ahead and returns 1 if the postfix consists of exactly two digits, 2 if the postfix consists of exactly
* two consecutive digits and a non extended character or of 4 digits.
* Returns 0 in any other case
**/
pub fn getLastASCII(&self) -> Result<u32, Exceptions> {
let length = self.input.length() as u32;
let from = self.fromPosition + self.characterLength;
if length - from > 4 || from >= length {
return Ok(0);
}
if length - from == 1 {
if isExtendedASCII(
self.input.charAt(from as usize)?,
self.input.getFNC1Character(),
) {
return Ok(0);
}
return Ok(1);
}
if length - from == 2 {
if isExtendedASCII(
self.input.charAt(from as usize)?,
self.input.getFNC1Character(),
) || isExtendedASCII(
self.input.charAt(from as usize + 1)?,
self.input.getFNC1Character(),
) {
return Ok(0);
}
if high_level_encoder::isDigit(self.input.charAt(from as usize)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 1)?)
{
return Ok(1);
}
return Ok(2);
}
if length - from == 3 {
if high_level_encoder::isDigit(self.input.charAt(from as usize)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 1)?)
&& !isExtendedASCII(
self.input.charAt(from as usize + 2)?,
self.input.getFNC1Character(),
)
{
return Ok(2);
}
if high_level_encoder::isDigit(self.input.charAt(from as usize + 1)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 2)?)
&& !isExtendedASCII(
self.input.charAt(from as usize)?,
self.input.getFNC1Character(),
)
{
return Ok(2);
}
return Ok(0);
}
if high_level_encoder::isDigit(self.input.charAt(from as usize)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 1)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 2)?)
&& high_level_encoder::isDigit(self.input.charAt(from as usize + 3)?)
{
return Ok(2);
}
Ok(0)
}
/** Returns the capacity in codewords of the smallest symbol that has enough capacity to fit the given minimal
* number of codewords.
**/
pub fn getMinSymbolSize(&self, minimum: u32) -> u32 {
match self.input.getShapeHint() {
SymbolShapeHint::FORCE_SQUARE => {
for capacity in SQUARE_CODEWORD_CAPACITIES {
// for (int capacity : squareCodewordCapacities) {
if capacity >= minimum {
return capacity;
}
}
}
SymbolShapeHint::FORCE_RECTANGLE => {
for capacity in RECTANGULAR_CODEWORD_CAPACITIES {
// for (int capacity : rectangularCodewordCapacities) {
if capacity >= minimum {
return capacity;
}
}
}
_ => {}
}
for capacity in ALL_CODEWORD_CAPACITIES {
// for (int capacity : allCodewordCapacities) {
if capacity >= minimum {
return capacity;
}
}
ALL_CODEWORD_CAPACITIES[ALL_CODEWORD_CAPACITIES.len() - 1]
}
/** Returns the remaining capacity in codewords of the smallest symbol that has enough capacity to fit the given
* minimal number of codewords.
**/
pub fn getCodewordsRemaining(&self, minimum: u32) -> u32 {
Self::getMinSymbolSize(self, minimum) - minimum
}
pub fn getBytes1(c: u32) -> Vec<u8> {
// let result = vec![0u8;1];
// result[0] = c as u8;
// result
vec![c as u8]
}
pub fn getBytes2(c1: u32, c2: u32) -> Vec<u8> {
// byte[] result = new byte[2];
// result[0] = (byte) c1;
// result[1] = (byte) c2;
// return result;
vec![c1 as u8, c2 as u8]
}
pub fn setC40Word(bytes: &mut [u8], offset: u32, c1: u32, c2: u32, c3: u32) {
let val16 = (1600 * (c1 & 0xff)) + (40 * (c2 & 0xff)) + (c3 & 0xff) + 1;
bytes[offset as usize] = (val16 / 256) as u8;
bytes[offset as usize + 1] = (val16 % 256) as u8;
}
fn getX12Value(c: char) -> u32 {
let c = c as u32;
if c == 13 {
0
} else if c == 42 {
1
} else if c == 62 {
2
} else if c == 32 {
3
} else if (48..=57).contains(&c) {
c - 44
} else if (65..=90).contains(&c) {
c - 51
} else {
c
}
}
pub fn getX12Words(&self) -> Result<Vec<u8>, Exceptions> {
assert!(self.characterLength % 3 == 0);
let mut result = vec![0u8; self.characterLength as usize / 3 * 2];
let mut i = 0;
while i < result.len() {
// for (int i = 0; i < result.length; i += 2) {
Self::setC40Word(
&mut result,
i as u32,
Self::getX12Value(self.input.charAt(self.fromPosition as usize + i / 2 * 3)?),
Self::getX12Value(
self.input
.charAt(self.fromPosition as usize + i / 2 * 3 + 1)?,
),
Self::getX12Value(
self.input
.charAt(self.fromPosition as usize + i / 2 * 3 + 2)?,
),
);
i += 2;
}
Ok(result)
}
pub fn getShiftValue(c: char, c40: bool, fnc1: Option<char>) -> u32 {
if c40 && isInC40Shift1Set(c) || !c40 && isInTextShift1Set(c) {
0
} else if c40 && isInC40Shift2Set(c, fnc1) || !c40 && isInTextShift2Set(c, fnc1) {
1
} else {
2
}
}
fn getC40Value(c40: bool, setIndex: u32, c: char, fnc1: Option<char>) -> u32 {
if let Some(fnc1_char) = fnc1 {
if c == fnc1_char {
assert!(setIndex == 2);
return 27;
}
}
if c40 {
let c = c as u32;
if c <= 31 {
c
} else if c == 32 {
3
} else if c <= 47 {
c - 33
} else if c <= 57 {
c - 44
} else if c <= 64 {
c - 43
} else if c <= 90 {
c - 51
} else if c <= 95 {
c - 69
} else if c <= 127 {
c - 96
} else {
c
}
} else {
let c = c as u32;
if c == 0 {
0
} else if setIndex == 0 && c <= 3 {
c - 1
} else if
//is this a bug in the spec?
setIndex == 1 && c <= 31 {
c
} else if c == 32 {
3
} else if (33..=47).contains(&c) {
c - 33
} else if (48..=57).contains(&c) {
c - 44
} else if (58..=64).contains(&c) {
c - 43
} else if (65..=90).contains(&c) {
c - 64
} else if (91..=95).contains(&c) {
c - 69
} else if c == 96 {
0
} else if (97..=122).contains(&c) {
c - 83
} else if (123..=127).contains(&c) {
c - 96
} else {
c
}
}
}
pub fn getC40Words(&self, c40: bool, fnc1: Option<char>) -> Result<Vec<u8>, Exceptions> {
let mut c40Values: Vec<u8> = Vec::new();
let fromPosition = self.fromPosition as usize;
for i in 0..self.characterLength as usize {
// for (int i = 0; i < characterLength; i++) {
let ci = self.input.charAt(fromPosition + i)?;
if c40 && high_level_encoder::isNativeC40(ci)
|| !c40 && high_level_encoder::isNativeText(ci)
{
c40Values.push(Self::getC40Value(c40, 0, ci, fnc1) as u8);
} else if !isExtendedASCII(ci, fnc1) {
let shiftValue = Self::getShiftValue(ci, c40, fnc1);
c40Values.push(shiftValue as u8); //Shift[123]
c40Values.push(Self::getC40Value(c40, shiftValue, ci, fnc1) as u8);
} else {
let asciiValue = (ci as u8 - 128) as char;
if c40 && high_level_encoder::isNativeC40(asciiValue)
|| !c40 && high_level_encoder::isNativeText(asciiValue)
{
c40Values.push(1); //Shift 2
c40Values.push(30); //Upper Shift
c40Values.push(Self::getC40Value(c40, 0, asciiValue, fnc1) as u8);
} else {
c40Values.push(1); //Shift 2
c40Values.push(30); //Upper Shift
let shiftValue = Self::getShiftValue(asciiValue, c40, fnc1);
c40Values.push(shiftValue as u8); // Shift[123]
c40Values.push(Self::getC40Value(c40, shiftValue, asciiValue, fnc1) as u8);
}
}
}
if (c40Values.len() % 3) != 0 {
assert!(
(c40Values.len() - 2) % 3 == 0
&& fromPosition + self.characterLength as usize == self.input.length()
);
c40Values.push(0); // pad with 0 (Shift 1)
}
let mut result = vec![0u8; c40Values.len() / 3 * 2];
let mut byteIndex = 0;
let mut i = 0;
while i < c40Values.len() {
// for (int i = 0; i < c40Values.size(); i += 3) {
Self::setC40Word(
&mut result,
byteIndex,
c40Values[i] as u32,
c40Values[i + 1] as u32,
c40Values[i + 2] as u32,
);
byteIndex += 2;
i += 3;
}
Ok(result)
}
pub fn getEDFBytes(&self) -> Result<Vec<u8>, Exceptions> {
let numberOfThirds = (self.characterLength as f32 / 4.0).ceil() as usize;
let mut result = vec![0u8; numberOfThirds * 3];
let mut pos = self.fromPosition as usize;
let endPos = (self.fromPosition as usize + self.characterLength as usize - 1)
.min(self.input.length() - 1);
let mut i = 0;
while i < numberOfThirds {
// for (int i = 0; i < numberOfThirds; i += 3) {
let mut edfValues = [0u32; 4];
for edfValue in &mut edfValues {
// for j in 0..4 {
// for (int j = 0; j < 4; j++) {
if pos <= endPos {
*edfValue = self.input.charAt(pos)? as u32 & 0x3f;
pos += 1;
} else {
*edfValue = if pos == endPos + 1 { 0x1f } else { 0 };
}
}
let mut val24 = edfValues[0] << 18;
val24 |= edfValues[1] << 12;
val24 |= edfValues[2] << 6;
val24 |= edfValues[3];
result[i] = ((val24 >> 16) & 0xff) as u8;
result[i + 1] = ((val24 >> 8) & 0xff) as u8;
result[i + 2] = (val24 & 0xff) as u8;
i += 3;
}
Ok(result)
}
pub fn getLatchBytes(&self) -> Result<Vec<u8>, Exceptions> {
match Self::getPreviousMode(self.previous.clone())? {
Mode::Ascii | Mode::B256 =>
//after B256 ends (via length) we are back to ASCII
{
match self.mode {
Mode::B256 => return Ok(Self::getBytes1(231)),
Mode::C40 => return Ok(Self::getBytes1(230)),
Mode::Text => return Ok(Self::getBytes1(239)),
Mode::X12 => return Ok(Self::getBytes1(238)),
Mode::Edf => return Ok(Self::getBytes1(240)),
_ => {}
}
}
Mode::C40 | Mode::Text | Mode::X12
if self.mode != Self::getPreviousMode(self.previous.clone())? =>
{
match self.mode {
Mode::Ascii => return Ok(Self::getBytes1(254)),
Mode::B256 => return Ok(Self::getBytes2(254, 231)),
Mode::C40 => return Ok(Self::getBytes2(254, 230)),
Mode::Text => return Ok(Self::getBytes2(254, 239)),
Mode::X12 => return Ok(Self::getBytes2(254, 238)),
Mode::Edf => return Ok(Self::getBytes2(254, 240)),
}
}
Mode::C40 | Mode::Text | Mode::X12 => {}
Mode::Edf => assert!(self.mode == Mode::Edf), //The rightmost EDIFACT edge always contains an unlatch character
}
Ok(Vec::new())
}
// Important: The function does not return the length bytes (one or two) in case of B256 encoding
pub fn getDataBytes(&self) -> Result<Vec<u8>, Exceptions> {
match self.mode {
Mode::Ascii => {
if self.input.isECI(self.fromPosition)? {
Ok(Self::getBytes2(
241,
self.input.getECIValue(self.fromPosition as usize)? as u32 + 1,
))
} else if isExtendedASCII(
self.input.charAt(self.fromPosition as usize)?,
self.input.getFNC1Character(),
) {
return Ok(Self::getBytes2(
235,
self.input.charAt(self.fromPosition as usize)? as u32 - 127,
));
} else if self.characterLength == 2 {
return Ok(Self::getBytes1(
(self.input.charAt(self.fromPosition as usize)? as u32 - b'0' as u32) * 10
+ self.input.charAt(self.fromPosition as usize + 1)? as u32
- b'0' as u32
+ 130,
));
} else if self.input.isFNC1(self.fromPosition as usize)? {
return Ok(Self::getBytes1(232));
} else {
return Ok(Self::getBytes1(
self.input.charAt(self.fromPosition as usize)? as u32 + 1,
));
}
}
Mode::B256 => Ok(Self::getBytes1(
self.input.charAt(self.fromPosition as usize)? as u32,
)),
Mode::C40 => self.getC40Words(true, self.input.getFNC1Character()),
Mode::Text => self.getC40Words(false, self.input.getFNC1Character()),
Mode::X12 => self.getX12Words(),
Mode::Edf => self.getEDFBytes(),
}
// assert!( false);
// Ok(vec![0])
}
}
struct RXingResult {
bytes: Vec<u8>,
}
impl RXingResult {
pub fn new(solution: Option<Rc<Edge>>) -> Result<Self, Exceptions> {
let solution = if let Some(edge) = solution {
edge
} else {
return Err(Exceptions::IllegalArgumentException(None));
};
let input = solution.input.clone();
let mut size = 0;
let mut bytesAL = Vec::new(); //new ArrayList<>();
let mut randomizePostfixLength = Vec::new(); //new ArrayList<>();
let mut randomizeLengths = Vec::new(); //new ArrayList<>();
if (solution.mode == Mode::C40 || solution.mode == Mode::Text || solution.mode == Mode::X12)
&& solution.getEndMode()? != Mode::Ascii
{
size += Self::prepend(&Edge::getBytes1(254), &mut bytesAL);
}
let mut hold_current = Some(solution.clone());
while let Some(current) = hold_current {
// Fails on i = 77 should be 151 is 144
size += Self::prepend(&current.getDataBytes()?, &mut bytesAL);
if current.previous.is_none()
|| Edge::getPreviousStartMode(current.previous.clone()) != current.getMode()
{
if current.getMode() == Mode::B256 {
if size <= 249 {
bytesAL.insert(0, size as u8);
size += 1;
} else {
bytesAL.insert(0, (size % 250) as u8);
bytesAL.insert(0, (size / 250 + 249) as u8);
size += 2;
}
randomizePostfixLength.push(bytesAL.len());
randomizeLengths.push(size);
}
Self::prepend(&current.getLatchBytes()?, &mut bytesAL);
size = 0;
}
hold_current = current.previous.clone();
}
if input.getMacroId() == 5 {
_ = Self::prepend(&Edge::getBytes1(236), &mut bytesAL);
} else if input.getMacroId() == 6 {
_ = Self::prepend(&Edge::getBytes1(237), &mut bytesAL);
}
if input.getFNC1Character().is_some() {
_ = Self::prepend(&Edge::getBytes1(232), &mut bytesAL);
}
for i in 0..randomizePostfixLength.len() {
// for (int i = 0; i < randomizePostfixLength.size(); i++) {
let bytes_al_len = bytesAL.len() as u32;
Self::applyRandomPattern(
&mut bytesAL,
bytes_al_len - *randomizePostfixLength.get(i).unwrap() as u32,
*randomizeLengths.get(i).unwrap() as u32,
);
}
//add padding
let capacity = solution.getMinSymbolSize(bytesAL.len() as u32);
if bytesAL.len() < capacity as usize {
bytesAL.push(129);
}
while bytesAL.len() < capacity as usize {
bytesAL.push(Self::randomize253State(bytesAL.len() as u32 + 1) as u8);
}
let mut bytes = vec![0u8; bytesAL.len()];
// for (i, byte) in bytes.iter_mut().enumerate() {
// // for (int i = 0; i < bytes.length; i++) {
// *byte = *bytesAL.get(i).unwrap();
// }
bytes[..].copy_from_slice(&bytesAL[..]);
Ok(Self { bytes })
}
pub fn prepend(bytes: &[u8], into: &mut Vec<u8>) -> usize {
for i in (0..bytes.len()).rev() {
// for (int i = bytes.length - 1; i >= 0; i--) {
into.insert(0, bytes[i]);
}
bytes.len()
}
fn randomize253State(codewordPosition: u32) -> u32 {
let pseudoRandom = ((149 * codewordPosition) % 253) + 1;
let tempVariable = 129 + pseudoRandom;
if tempVariable <= 254 {
tempVariable
} else {
tempVariable - 254
}
}
pub fn applyRandomPattern(bytesAL: &mut [u8], startPosition: u32, length: u32) {
for i in 0..length as usize {
// for (int i = 0; i < length; i++) {
//See "B.1 253-state algorithm
let Pad_codeword_position = startPosition as usize + i;
let Pad_codeword_value = bytesAL.get(Pad_codeword_position).expect("known to exist");
let pseudo_random_number = ((149 * (Pad_codeword_position + 1)) % 255) + 1;
let temp_variable: u16 = *Pad_codeword_value as u16 + pseudo_random_number as u16;
bytesAL[Pad_codeword_position] = if temp_variable <= 255 {
temp_variable as u8
} else {
(temp_variable - 256) as u8
};
}
}
pub fn getBytes(&self) -> &[u8] {
&self.bytes
}
}
struct Input {
shape: SymbolShapeHint,
macroId: i32,
internal: MinimalECIInput,
}
impl Input {
pub fn new(
stringToEncode: &str,
priorityCharset: Option<EncodingRef>,
fnc1: Option<char>,
shape: SymbolShapeHint,
macroId: i32,
) -> Self {
let z = fnc1.unwrap_or_default().to_string();
let v = if fnc1.is_some() {
Some(z.as_str())
} else {
None
};
Self {
shape,
macroId,
internal: MinimalECIInput::new(stringToEncode, priorityCharset, v),
}
}
pub fn getMacroId(&self) -> i32 {
self.macroId
}
pub fn getShapeHint(&self) -> SymbolShapeHint {
self.shape
}
pub fn length(&self) -> usize {
self.internal.length()
}
pub fn isECI(&self, index: u32) -> Result<bool, Exceptions> {
self.internal.isECI(index)
}
pub fn charAt(&self, index: usize) -> Result<char, Exceptions> {
self.internal.charAt(index)
}
pub fn getFNC1Character(&self) -> Option<char> {
if self.internal.getFNC1Character() == 1000 {
None
} else {
Some(self.internal.getFNC1Character() as u8 as char)
}
}
fn haveNCharacters(&self, index: usize, n: usize) -> bool {
self.internal.haveNCharacters(index, n)
}
fn isFNC1(&self, index: usize) -> Result<bool, Exceptions> {
self.internal.isFNC1(index)
}
fn getECIValue(&self, index: usize) -> Result<i32, Exceptions> {
self.internal.getECIValue(index)
}
}
impl fmt::Display for Input {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.internal.fmt(f)
}
}
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