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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* This Source Code Form is subject to the terms of the Mozilla Public
3 : * License, v. 2.0. If a copy of the MPL was not distributed with this
4 : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5 :
6 : #include "txXSLTNumber.h"
7 : #include "nsReadableUtils.h"
8 : #include "txCore.h"
9 :
10 0 : class txDecimalCounter : public txFormattedCounter {
11 : public:
12 0 : txDecimalCounter() : mMinLength(1), mGroupSize(50)
13 : {
14 0 : }
15 :
16 : txDecimalCounter(int32_t aMinLength, int32_t aGroupSize,
17 : const nsAString& mGroupSeparator);
18 :
19 : virtual void appendNumber(int32_t aNumber, nsAString& aDest);
20 :
21 : private:
22 : int32_t mMinLength;
23 : int32_t mGroupSize;
24 : nsString mGroupSeparator;
25 : };
26 :
27 0 : class txAlphaCounter : public txFormattedCounter {
28 : public:
29 0 : explicit txAlphaCounter(char16_t aOffset) : mOffset(aOffset)
30 : {
31 0 : }
32 :
33 : virtual void appendNumber(int32_t aNumber, nsAString& aDest);
34 :
35 : private:
36 : char16_t mOffset;
37 : };
38 :
39 0 : class txRomanCounter : public txFormattedCounter {
40 : public:
41 0 : explicit txRomanCounter(bool aUpper) : mTableOffset(aUpper ? 30 : 0)
42 : {
43 0 : }
44 :
45 : void appendNumber(int32_t aNumber, nsAString& aDest);
46 :
47 : private:
48 : int32_t mTableOffset;
49 : };
50 :
51 :
52 : nsresult
53 0 : txFormattedCounter::getCounterFor(const nsString& aToken,
54 : int32_t aGroupSize,
55 : const nsAString& aGroupSeparator,
56 : txFormattedCounter*& aCounter)
57 : {
58 0 : int32_t length = aToken.Length();
59 0 : NS_ASSERTION(length, "getting counter for empty token");
60 0 : aCounter = 0;
61 :
62 0 : if (length == 1) {
63 0 : char16_t ch = aToken.CharAt(0);
64 0 : switch (ch) {
65 :
66 : case 'i':
67 : case 'I':
68 0 : aCounter = new txRomanCounter(ch == 'I');
69 0 : break;
70 :
71 : case 'a':
72 : case 'A':
73 0 : aCounter = new txAlphaCounter(ch);
74 0 : break;
75 :
76 : case '1':
77 : default:
78 : // if we don't recognize the token then use "1"
79 0 : aCounter = new txDecimalCounter(1, aGroupSize,
80 0 : aGroupSeparator);
81 0 : break;
82 : }
83 0 : MOZ_ASSERT(aCounter);
84 0 : return NS_OK;
85 : }
86 :
87 : // for now, the only multi-char token we support are decimals
88 : int32_t i;
89 0 : for (i = 0; i < length-1; ++i) {
90 0 : if (aToken.CharAt(i) != '0')
91 0 : break;
92 : }
93 0 : if (i == length-1 && aToken.CharAt(i) == '1') {
94 0 : aCounter = new txDecimalCounter(length, aGroupSize, aGroupSeparator);
95 : }
96 : else {
97 : // if we don't recognize the token then use '1'
98 0 : aCounter = new txDecimalCounter(1, aGroupSize, aGroupSeparator);
99 : }
100 0 : MOZ_ASSERT(aCounter);
101 0 : return NS_OK;
102 : }
103 :
104 :
105 0 : txDecimalCounter::txDecimalCounter(int32_t aMinLength, int32_t aGroupSize,
106 0 : const nsAString& aGroupSeparator)
107 : : mMinLength(aMinLength), mGroupSize(aGroupSize),
108 0 : mGroupSeparator(aGroupSeparator)
109 : {
110 0 : if (mGroupSize <= 0) {
111 0 : mGroupSize = aMinLength + 10;
112 : }
113 0 : }
114 :
115 0 : void txDecimalCounter::appendNumber(int32_t aNumber, nsAString& aDest)
116 : {
117 0 : const int32_t bufsize = 10; //must be able to fit an int32_t
118 : char16_t buf[bufsize];
119 0 : int32_t pos = bufsize;
120 0 : while (aNumber > 0) {
121 0 : int32_t ch = aNumber % 10;
122 0 : aNumber /= 10;
123 0 : buf[--pos] = ch + '0';
124 : }
125 :
126 : // in case we didn't get a long enough string
127 0 : int32_t end = (bufsize > mMinLength) ? bufsize - mMinLength : 0;
128 0 : while (pos > end) {
129 0 : buf[--pos] = '0';
130 : }
131 :
132 : // in case we *still* didn't get a long enough string.
133 : // this should be very rare since it only happens if mMinLength is bigger
134 : // then the length of any int32_t.
135 : // pos will always be zero
136 0 : int32_t extraPos = mMinLength;
137 0 : while (extraPos > bufsize) {
138 0 : aDest.Append(char16_t('0'));
139 0 : --extraPos;
140 0 : if (extraPos % mGroupSize == 0) {
141 0 : aDest.Append(mGroupSeparator);
142 : }
143 : }
144 :
145 : // copy string to buffer
146 0 : if (mGroupSize >= bufsize - pos) {
147 : // no grouping will occur
148 0 : aDest.Append(buf + pos, (uint32_t)(bufsize - pos));
149 : }
150 : else {
151 : // append chars up to first grouping separator
152 0 : int32_t len = ((bufsize - pos - 1) % mGroupSize) + 1;
153 0 : aDest.Append(buf + pos, len);
154 0 : pos += len;
155 0 : while (bufsize - pos > 0) {
156 0 : aDest.Append(mGroupSeparator);
157 0 : aDest.Append(buf + pos, mGroupSize);
158 0 : pos += mGroupSize;
159 : }
160 0 : NS_ASSERTION(bufsize == pos, "error while grouping");
161 : }
162 0 : }
163 :
164 :
165 0 : void txAlphaCounter::appendNumber(int32_t aNumber, nsAString& aDest)
166 : {
167 : char16_t buf[12];
168 0 : buf[11] = 0;
169 0 : int32_t pos = 11;
170 0 : while (aNumber > 0) {
171 0 : --aNumber;
172 0 : int32_t ch = aNumber % 26;
173 0 : aNumber /= 26;
174 0 : buf[--pos] = ch + mOffset;
175 : }
176 :
177 0 : aDest.Append(buf + pos, (uint32_t)(11 - pos));
178 0 : }
179 :
180 :
181 : const char* const kTxRomanNumbers[] =
182 : {"", "c", "cc", "ccc", "cd", "d", "dc", "dcc", "dccc", "cm",
183 : "", "x", "xx", "xxx", "xl", "l", "lx", "lxx", "lxxx", "xc",
184 : "", "i", "ii", "iii", "iv", "v", "vi", "vii", "viii", "ix",
185 : "", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM",
186 : "", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC",
187 : "", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"};
188 :
189 0 : void txRomanCounter::appendNumber(int32_t aNumber, nsAString& aDest)
190 : {
191 : // Numbers bigger then 3999 and negative numbers can't be done in roman
192 0 : if (uint32_t(aNumber) >= 4000) {
193 0 : txDecimalCounter().appendNumber(aNumber, aDest);
194 0 : return;
195 : }
196 :
197 0 : while (aNumber >= 1000) {
198 0 : aDest.Append(!mTableOffset ? char16_t('m') : char16_t('M'));
199 0 : aNumber -= 1000;
200 : }
201 :
202 : int32_t posValue;
203 :
204 : // Hundreds
205 0 : posValue = aNumber / 100;
206 0 : aNumber %= 100;
207 0 : AppendASCIItoUTF16(kTxRomanNumbers[posValue + mTableOffset], aDest);
208 : // Tens
209 0 : posValue = aNumber / 10;
210 0 : aNumber %= 10;
211 0 : AppendASCIItoUTF16(kTxRomanNumbers[10 + posValue + mTableOffset], aDest);
212 : // Ones
213 0 : AppendASCIItoUTF16(kTxRomanNumbers[20 + aNumber + mTableOffset], aDest);
214 : }
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