1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 // Original code is licensed as follows:
7 /*
8 * Copyright 2006-2007 Jeremias Maerki.
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 * http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23 #include "fxbarcode/datamatrix/BC_ASCIIEncoder.h"
24
25 #include "fxbarcode/datamatrix/BC_Encoder.h"
26 #include "fxbarcode/datamatrix/BC_EncoderContext.h"
27 #include "fxbarcode/datamatrix/BC_HighLevelEncoder.h"
28 #include "fxbarcode/datamatrix/BC_SymbolInfo.h"
29 #include "fxbarcode/utils.h"
30
CBC_ASCIIEncoder()31 CBC_ASCIIEncoder::CBC_ASCIIEncoder() {}
~CBC_ASCIIEncoder()32 CBC_ASCIIEncoder::~CBC_ASCIIEncoder() {}
getEncodingMode()33 int32_t CBC_ASCIIEncoder::getEncodingMode() {
34 return ASCII_ENCODATION;
35 }
Encode(CBC_EncoderContext & context,int32_t & e)36 void CBC_ASCIIEncoder::Encode(CBC_EncoderContext& context, int32_t& e) {
37 int32_t n = CBC_HighLevelEncoder::determineConsecutiveDigitCount(
38 context.m_msg, context.m_pos);
39 if (n >= 2) {
40 wchar_t code = encodeASCIIDigits(context.m_msg[context.m_pos],
41 context.m_msg[context.m_pos + 1], e);
42 if (e != BCExceptionNO) {
43 return;
44 }
45 context.writeCodeword(code);
46 context.m_pos += 2;
47 } else {
48 wchar_t c = context.getCurrentChar();
49 int32_t newMode = CBC_HighLevelEncoder::lookAheadTest(
50 context.m_msg, context.m_pos, getEncodingMode());
51 if (newMode != getEncodingMode()) {
52 switch (newMode) {
53 case BASE256_ENCODATION:
54 context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_BASE256);
55 context.signalEncoderChange(BASE256_ENCODATION);
56 return;
57 case C40_ENCODATION:
58 context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_C40);
59 context.signalEncoderChange(C40_ENCODATION);
60 return;
61 case X12_ENCODATION:
62 context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_ANSIX12);
63 context.signalEncoderChange(X12_ENCODATION);
64 break;
65 case TEXT_ENCODATION:
66 context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_TEXT);
67 context.signalEncoderChange(TEXT_ENCODATION);
68 break;
69 case EDIFACT_ENCODATION:
70 context.writeCodeword(CBC_HighLevelEncoder::LATCH_TO_EDIFACT);
71 context.signalEncoderChange(EDIFACT_ENCODATION);
72 break;
73 default:
74 e = BCExceptionIllegalStateIllegalMode;
75 return;
76 }
77 } else if (CBC_HighLevelEncoder::isExtendedASCII(c)) {
78 context.writeCodeword(CBC_HighLevelEncoder::UPPER_SHIFT);
79 context.writeCodeword((wchar_t)(c - 128 + 1));
80 context.m_pos++;
81 } else {
82 context.writeCodeword((wchar_t)(c + 1));
83 context.m_pos++;
84 }
85 }
86 }
encodeASCIIDigits(wchar_t digit1,wchar_t digit2,int32_t & e)87 wchar_t CBC_ASCIIEncoder::encodeASCIIDigits(wchar_t digit1,
88 wchar_t digit2,
89 int32_t& e) {
90 if (CBC_HighLevelEncoder::isDigit(digit1) &&
91 CBC_HighLevelEncoder::isDigit(digit2)) {
92 int32_t num = (digit1 - 48) * 10 + (digit2 - 48);
93 return (wchar_t)(num + 130);
94 }
95 e = BCExceptionIllegalArgumentNotGigits;
96 return 0;
97 }
98