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
7 #include <stddef.h> // For offsetof().
8 #include <cctype>
9
10 #include "core/include/fxcrt/fx_basic.h"
11 #include "third_party/base/numerics/safe_math.h"
12
_Buffer_itoa(char * buf,int i,FX_DWORD flags)13 static int _Buffer_itoa(char* buf, int i, FX_DWORD flags) {
14 if (i == 0) {
15 buf[0] = '0';
16 return 1;
17 }
18 char buf1[32];
19 int buf_pos = 31;
20 FX_DWORD u = i;
21 if ((flags & FXFORMAT_SIGNED) && i < 0) {
22 u = -i;
23 }
24 int base = 10;
25 const FX_CHAR* string = "0123456789abcdef";
26 if (flags & FXFORMAT_HEX) {
27 base = 16;
28 if (flags & FXFORMAT_CAPITAL) {
29 string = "0123456789ABCDEF";
30 }
31 }
32 while (u != 0) {
33 buf1[buf_pos--] = string[u % base];
34 u = u / base;
35 }
36 if ((flags & FXFORMAT_SIGNED) && i < 0) {
37 buf1[buf_pos--] = '-';
38 }
39 int len = 31 - buf_pos;
40 for (int ii = 0; ii < len; ii++) {
41 buf[ii] = buf1[ii + buf_pos + 1];
42 }
43 return len;
44 }
FormatInteger(int i,FX_DWORD flags)45 CFX_ByteString CFX_ByteString::FormatInteger(int i, FX_DWORD flags) {
46 char buf[32];
47 return CFX_ByteStringC(buf, _Buffer_itoa(buf, i, flags));
48 }
49
50 // static
Create(int nLen)51 CFX_ByteString::StringData* CFX_ByteString::StringData::Create(int nLen) {
52 // |nLen| is currently declared as in |int|. TODO(palmer): It should be
53 // a |size_t|, or at least unsigned.
54 if (nLen == 0 || nLen < 0) {
55 return NULL;
56 }
57
58 // Fixed portion of header plus a NUL char not included in m_nAllocLength.
59 // sizeof(FX_CHAR) is always 1, used for consistency with CFX_Widestring.
60 int overhead = offsetof(StringData, m_String) + sizeof(FX_CHAR);
61 pdfium::base::CheckedNumeric<int> nSize = nLen;
62 nSize += overhead;
63
64 // Now round to an 8-byte boundary. We'd expect that this is the minimum
65 // granularity of any of the underlying allocators, so there may be cases
66 // where we can save a re-alloc when adding a few characters to a string
67 // by using this otherwise wasted space.
68 nSize += 7;
69 int totalSize = nSize.ValueOrDie() & ~7;
70 int usableSize = totalSize - overhead;
71 FXSYS_assert(usableSize >= nLen);
72
73 void* pData = FX_Alloc(uint8_t, totalSize);
74 return new (pData) StringData(nLen, usableSize);
75 }
~CFX_ByteString()76 CFX_ByteString::~CFX_ByteString() {
77 if (m_pData) {
78 m_pData->Release();
79 }
80 }
CFX_ByteString(const FX_CHAR * lpsz,FX_STRSIZE nLen)81 CFX_ByteString::CFX_ByteString(const FX_CHAR* lpsz, FX_STRSIZE nLen) {
82 if (nLen < 0) {
83 nLen = lpsz ? FXSYS_strlen(lpsz) : 0;
84 }
85 if (nLen) {
86 m_pData = StringData::Create(nLen);
87 if (m_pData) {
88 FXSYS_memcpy(m_pData->m_String, lpsz, nLen);
89 }
90 } else {
91 m_pData = NULL;
92 }
93 }
CFX_ByteString(const uint8_t * lpsz,FX_STRSIZE nLen)94 CFX_ByteString::CFX_ByteString(const uint8_t* lpsz, FX_STRSIZE nLen) {
95 if (nLen > 0) {
96 m_pData = StringData::Create(nLen);
97 if (m_pData) {
98 FXSYS_memcpy(m_pData->m_String, lpsz, nLen);
99 }
100 } else {
101 m_pData = NULL;
102 }
103 }
CFX_ByteString(char ch)104 CFX_ByteString::CFX_ByteString(char ch) {
105 m_pData = StringData::Create(1);
106 if (m_pData) {
107 m_pData->m_String[0] = ch;
108 }
109 }
CFX_ByteString(const CFX_ByteString & stringSrc)110 CFX_ByteString::CFX_ByteString(const CFX_ByteString& stringSrc) {
111 if (!stringSrc.m_pData) {
112 m_pData = NULL;
113 return;
114 }
115 if (stringSrc.m_pData->m_nRefs >= 0) {
116 m_pData = stringSrc.m_pData;
117 m_pData->Retain();
118 } else {
119 m_pData = NULL;
120 *this = stringSrc;
121 }
122 }
CFX_ByteString(const CFX_ByteStringC & stringSrc)123 CFX_ByteString::CFX_ByteString(const CFX_ByteStringC& stringSrc) {
124 if (stringSrc.IsEmpty()) {
125 m_pData = NULL;
126 return;
127 }
128 m_pData = NULL;
129 *this = stringSrc;
130 }
CFX_ByteString(const CFX_ByteStringC & str1,const CFX_ByteStringC & str2)131 CFX_ByteString::CFX_ByteString(const CFX_ByteStringC& str1,
132 const CFX_ByteStringC& str2) {
133 m_pData = NULL;
134 int nNewLen = str1.GetLength() + str2.GetLength();
135 if (nNewLen == 0) {
136 return;
137 }
138 m_pData = StringData::Create(nNewLen);
139 if (m_pData) {
140 FXSYS_memcpy(m_pData->m_String, str1.GetCStr(), str1.GetLength());
141 FXSYS_memcpy(m_pData->m_String + str1.GetLength(), str2.GetCStr(),
142 str2.GetLength());
143 }
144 }
operator =(const FX_CHAR * lpsz)145 const CFX_ByteString& CFX_ByteString::operator=(const FX_CHAR* lpsz) {
146 if (!lpsz || lpsz[0] == 0) {
147 Empty();
148 } else {
149 AssignCopy(FXSYS_strlen(lpsz), lpsz);
150 }
151 return *this;
152 }
operator =(const CFX_ByteStringC & str)153 const CFX_ByteString& CFX_ByteString::operator=(const CFX_ByteStringC& str) {
154 if (str.IsEmpty()) {
155 Empty();
156 } else {
157 AssignCopy(str.GetLength(), str.GetCStr());
158 }
159 return *this;
160 }
operator =(const CFX_ByteString & stringSrc)161 const CFX_ByteString& CFX_ByteString::operator=(
162 const CFX_ByteString& stringSrc) {
163 if (m_pData == stringSrc.m_pData) {
164 return *this;
165 }
166 if (stringSrc.IsEmpty()) {
167 Empty();
168 } else if ((m_pData && m_pData->m_nRefs < 0) ||
169 (stringSrc.m_pData && stringSrc.m_pData->m_nRefs < 0)) {
170 AssignCopy(stringSrc.m_pData->m_nDataLength, stringSrc.m_pData->m_String);
171 } else {
172 Empty();
173 m_pData = stringSrc.m_pData;
174 if (m_pData) {
175 m_pData->Retain();
176 }
177 }
178 return *this;
179 }
operator =(const CFX_BinaryBuf & buf)180 const CFX_ByteString& CFX_ByteString::operator=(const CFX_BinaryBuf& buf) {
181 Load(buf.GetBuffer(), buf.GetSize());
182 return *this;
183 }
Load(const uint8_t * buf,FX_STRSIZE len)184 void CFX_ByteString::Load(const uint8_t* buf, FX_STRSIZE len) {
185 Empty();
186 if (len) {
187 m_pData = StringData::Create(len);
188 if (m_pData) {
189 FXSYS_memcpy(m_pData->m_String, buf, len);
190 }
191 } else {
192 m_pData = NULL;
193 }
194 }
operator +=(const FX_CHAR * lpsz)195 const CFX_ByteString& CFX_ByteString::operator+=(const FX_CHAR* lpsz) {
196 if (lpsz) {
197 ConcatInPlace(FXSYS_strlen(lpsz), lpsz);
198 }
199 return *this;
200 }
operator +=(char ch)201 const CFX_ByteString& CFX_ByteString::operator+=(char ch) {
202 ConcatInPlace(1, &ch);
203 return *this;
204 }
operator +=(const CFX_ByteString & string)205 const CFX_ByteString& CFX_ByteString::operator+=(const CFX_ByteString& string) {
206 if (!string.m_pData) {
207 return *this;
208 }
209 ConcatInPlace(string.m_pData->m_nDataLength, string.m_pData->m_String);
210 return *this;
211 }
operator +=(const CFX_ByteStringC & string)212 const CFX_ByteString& CFX_ByteString::operator+=(
213 const CFX_ByteStringC& string) {
214 if (string.IsEmpty()) {
215 return *this;
216 }
217 ConcatInPlace(string.GetLength(), string.GetCStr());
218 return *this;
219 }
Equal(const char * ptr) const220 bool CFX_ByteString::Equal(const char* ptr) const {
221 if (!m_pData) {
222 return !ptr || ptr[0] == '\0';
223 }
224 if (!ptr) {
225 return m_pData->m_nDataLength == 0;
226 }
227 return FXSYS_strlen(ptr) == m_pData->m_nDataLength &&
228 FXSYS_memcmp(ptr, m_pData->m_String, m_pData->m_nDataLength) == 0;
229 }
Equal(const CFX_ByteStringC & str) const230 bool CFX_ByteString::Equal(const CFX_ByteStringC& str) const {
231 if (!m_pData) {
232 return str.IsEmpty();
233 }
234 return m_pData->m_nDataLength == str.GetLength() &&
235 FXSYS_memcmp(m_pData->m_String, str.GetCStr(), str.GetLength()) == 0;
236 }
Equal(const CFX_ByteString & other) const237 bool CFX_ByteString::Equal(const CFX_ByteString& other) const {
238 if (IsEmpty()) {
239 return other.IsEmpty();
240 }
241 if (other.IsEmpty()) {
242 return false;
243 }
244 return other.m_pData->m_nDataLength == m_pData->m_nDataLength &&
245 FXSYS_memcmp(other.m_pData->m_String, m_pData->m_String,
246 m_pData->m_nDataLength) == 0;
247 }
Empty()248 void CFX_ByteString::Empty() {
249 if (m_pData) {
250 m_pData->Release();
251 m_pData = NULL;
252 }
253 }
EqualNoCase(const CFX_ByteStringC & str) const254 bool CFX_ByteString::EqualNoCase(const CFX_ByteStringC& str) const {
255 if (!m_pData) {
256 return str.IsEmpty();
257 }
258 FX_STRSIZE len = str.GetLength();
259 if (m_pData->m_nDataLength != len) {
260 return false;
261 }
262 const uint8_t* pThis = (const uint8_t*)m_pData->m_String;
263 const uint8_t* pThat = str.GetPtr();
264 for (FX_STRSIZE i = 0; i < len; i++) {
265 if ((*pThis) != (*pThat)) {
266 uint8_t bThis = *pThis;
267 if (bThis >= 'A' && bThis <= 'Z') {
268 bThis += 'a' - 'A';
269 }
270 uint8_t bThat = *pThat;
271 if (bThat >= 'A' && bThat <= 'Z') {
272 bThat += 'a' - 'A';
273 }
274 if (bThis != bThat) {
275 return false;
276 }
277 }
278 pThis++;
279 pThat++;
280 }
281 return true;
282 }
AssignCopy(FX_STRSIZE nSrcLen,const FX_CHAR * lpszSrcData)283 void CFX_ByteString::AssignCopy(FX_STRSIZE nSrcLen,
284 const FX_CHAR* lpszSrcData) {
285 AllocBeforeWrite(nSrcLen);
286 FXSYS_memcpy(m_pData->m_String, lpszSrcData, nSrcLen);
287 m_pData->m_nDataLength = nSrcLen;
288 m_pData->m_String[nSrcLen] = 0;
289 }
CopyBeforeWrite()290 void CFX_ByteString::CopyBeforeWrite() {
291 if (!m_pData || m_pData->m_nRefs <= 1) {
292 return;
293 }
294 StringData* pData = m_pData;
295 m_pData->Release();
296 FX_STRSIZE nDataLength = pData->m_nDataLength;
297 m_pData = StringData::Create(nDataLength);
298 if (m_pData) {
299 FXSYS_memcpy(m_pData->m_String, pData->m_String, nDataLength + 1);
300 }
301 }
AllocBeforeWrite(FX_STRSIZE nLen)302 void CFX_ByteString::AllocBeforeWrite(FX_STRSIZE nLen) {
303 if (m_pData && m_pData->m_nRefs <= 1 && m_pData->m_nAllocLength >= nLen) {
304 return;
305 }
306 Empty();
307 m_pData = StringData::Create(nLen);
308 }
ReleaseBuffer(FX_STRSIZE nNewLength)309 void CFX_ByteString::ReleaseBuffer(FX_STRSIZE nNewLength) {
310 if (!m_pData) {
311 return;
312 }
313 CopyBeforeWrite();
314 if (nNewLength == -1) {
315 nNewLength = FXSYS_strlen((const FX_CHAR*)m_pData->m_String);
316 }
317 if (nNewLength == 0) {
318 Empty();
319 return;
320 }
321 FXSYS_assert(nNewLength <= m_pData->m_nAllocLength);
322 m_pData->m_nDataLength = nNewLength;
323 m_pData->m_String[nNewLength] = 0;
324 }
Reserve(FX_STRSIZE len)325 void CFX_ByteString::Reserve(FX_STRSIZE len) {
326 GetBuffer(len);
327 ReleaseBuffer(GetLength());
328 }
GetBuffer(FX_STRSIZE nMinBufLength)329 FX_CHAR* CFX_ByteString::GetBuffer(FX_STRSIZE nMinBufLength) {
330 if (!m_pData && nMinBufLength == 0) {
331 return NULL;
332 }
333 if (m_pData && m_pData->m_nRefs <= 1 &&
334 m_pData->m_nAllocLength >= nMinBufLength) {
335 return m_pData->m_String;
336 }
337 if (!m_pData) {
338 m_pData = StringData::Create(nMinBufLength);
339 if (!m_pData) {
340 return NULL;
341 }
342 m_pData->m_nDataLength = 0;
343 m_pData->m_String[0] = 0;
344 return m_pData->m_String;
345 }
346 StringData* pOldData = m_pData;
347 FX_STRSIZE nOldLen = pOldData->m_nDataLength;
348 if (nMinBufLength < nOldLen) {
349 nMinBufLength = nOldLen;
350 }
351 m_pData = StringData::Create(nMinBufLength);
352 if (!m_pData) {
353 return NULL;
354 }
355 FXSYS_memcpy(m_pData->m_String, pOldData->m_String, (nOldLen + 1));
356 m_pData->m_nDataLength = nOldLen;
357 pOldData->Release();
358 return m_pData->m_String;
359 }
Delete(FX_STRSIZE nIndex,FX_STRSIZE nCount)360 FX_STRSIZE CFX_ByteString::Delete(FX_STRSIZE nIndex, FX_STRSIZE nCount) {
361 if (!m_pData) {
362 return 0;
363 }
364 if (nIndex < 0) {
365 nIndex = 0;
366 }
367 FX_STRSIZE nOldLength = m_pData->m_nDataLength;
368 if (nCount > 0 && nIndex < nOldLength) {
369 FX_STRSIZE mLength = nIndex + nCount;
370 if (mLength >= nOldLength) {
371 m_pData->m_nDataLength = nIndex;
372 return m_pData->m_nDataLength;
373 }
374 CopyBeforeWrite();
375 int nBytesToCopy = nOldLength - mLength + 1;
376 FXSYS_memmove(m_pData->m_String + nIndex, m_pData->m_String + mLength,
377 nBytesToCopy);
378 m_pData->m_nDataLength = nOldLength - nCount;
379 }
380 return m_pData->m_nDataLength;
381 }
ConcatInPlace(FX_STRSIZE nSrcLen,const FX_CHAR * lpszSrcData)382 void CFX_ByteString::ConcatInPlace(FX_STRSIZE nSrcLen,
383 const FX_CHAR* lpszSrcData) {
384 if (nSrcLen == 0 || !lpszSrcData) {
385 return;
386 }
387 if (!m_pData) {
388 m_pData = StringData::Create(nSrcLen);
389 if (!m_pData) {
390 return;
391 }
392 FXSYS_memcpy(m_pData->m_String, lpszSrcData, nSrcLen);
393 return;
394 }
395 if (m_pData->m_nRefs > 1 ||
396 m_pData->m_nDataLength + nSrcLen > m_pData->m_nAllocLength) {
397 ConcatCopy(m_pData->m_nDataLength, m_pData->m_String, nSrcLen, lpszSrcData);
398 } else {
399 FXSYS_memcpy(m_pData->m_String + m_pData->m_nDataLength, lpszSrcData,
400 nSrcLen);
401 m_pData->m_nDataLength += nSrcLen;
402 m_pData->m_String[m_pData->m_nDataLength] = 0;
403 }
404 }
ConcatCopy(FX_STRSIZE nSrc1Len,const FX_CHAR * lpszSrc1Data,FX_STRSIZE nSrc2Len,const FX_CHAR * lpszSrc2Data)405 void CFX_ByteString::ConcatCopy(FX_STRSIZE nSrc1Len,
406 const FX_CHAR* lpszSrc1Data,
407 FX_STRSIZE nSrc2Len,
408 const FX_CHAR* lpszSrc2Data) {
409 int nNewLen = nSrc1Len + nSrc2Len;
410 if (nNewLen <= 0) {
411 return;
412 }
413 // Don't release until done copying, might be one of the arguments.
414 StringData* pOldData = m_pData;
415 m_pData = StringData::Create(nNewLen);
416 if (m_pData) {
417 memcpy(m_pData->m_String, lpszSrc1Data, nSrc1Len);
418 memcpy(m_pData->m_String + nSrc1Len, lpszSrc2Data, nSrc2Len);
419 }
420 pOldData->Release();
421 }
Mid(FX_STRSIZE nFirst) const422 CFX_ByteString CFX_ByteString::Mid(FX_STRSIZE nFirst) const {
423 if (!m_pData) {
424 return CFX_ByteString();
425 }
426 return Mid(nFirst, m_pData->m_nDataLength - nFirst);
427 }
Mid(FX_STRSIZE nFirst,FX_STRSIZE nCount) const428 CFX_ByteString CFX_ByteString::Mid(FX_STRSIZE nFirst, FX_STRSIZE nCount) const {
429 if (nFirst < 0) {
430 nFirst = 0;
431 }
432 if (nCount < 0) {
433 nCount = 0;
434 }
435 if (nFirst + nCount > m_pData->m_nDataLength) {
436 nCount = m_pData->m_nDataLength - nFirst;
437 }
438 if (nFirst > m_pData->m_nDataLength) {
439 nCount = 0;
440 }
441 if (nFirst == 0 && nFirst + nCount == m_pData->m_nDataLength) {
442 return *this;
443 }
444 CFX_ByteString dest;
445 AllocCopy(dest, nCount, nFirst);
446 return dest;
447 }
AllocCopy(CFX_ByteString & dest,FX_STRSIZE nCopyLen,FX_STRSIZE nCopyIndex) const448 void CFX_ByteString::AllocCopy(CFX_ByteString& dest,
449 FX_STRSIZE nCopyLen,
450 FX_STRSIZE nCopyIndex) const {
451 // |FX_STRSIZE| is currently typedef'd as in |int|. TODO(palmer): It
452 // should be a |size_t|, or at least unsigned.
453 if (nCopyLen == 0 || nCopyLen < 0) {
454 return;
455 }
456 ASSERT(!dest.m_pData);
457 dest.m_pData = StringData::Create(nCopyLen);
458 if (dest.m_pData) {
459 FXSYS_memcpy(dest.m_pData->m_String, m_pData->m_String + nCopyIndex,
460 nCopyLen);
461 }
462 }
463 #define FORCE_ANSI 0x10000
464 #define FORCE_UNICODE 0x20000
465 #define FORCE_INT64 0x40000
FormatV(const FX_CHAR * lpszFormat,va_list argList)466 void CFX_ByteString::FormatV(const FX_CHAR* lpszFormat, va_list argList) {
467 va_list argListSave;
468 #if defined(__ARMCC_VERSION) || \
469 (!defined(_MSC_VER) && (_FX_CPU_ == _FX_X64_ || _FX_CPU_ == _FX_IA64_ || \
470 _FX_CPU_ == _FX_ARM64_)) || \
471 defined(__native_client__)
472 va_copy(argListSave, argList);
473 #else
474 argListSave = argList;
475 #endif
476 int nMaxLen = 0;
477 for (const FX_CHAR* lpsz = lpszFormat; *lpsz != 0; lpsz++) {
478 if (*lpsz != '%' || *(lpsz = lpsz + 1) == '%') {
479 nMaxLen += FXSYS_strlen(lpsz);
480 continue;
481 }
482 int nItemLen = 0;
483 int nWidth = 0;
484 for (; *lpsz != 0; lpsz++) {
485 if (*lpsz == '#') {
486 nMaxLen += 2;
487 } else if (*lpsz == '*') {
488 nWidth = va_arg(argList, int);
489 } else if (*lpsz == '-' || *lpsz == '+' || *lpsz == '0' || *lpsz == ' ')
490 ;
491 else {
492 break;
493 }
494 }
495 if (nWidth == 0) {
496 nWidth = FXSYS_atoi(lpsz);
497 while (std::isdigit(*lpsz))
498 lpsz++;
499 }
500 if (nWidth < 0 || nWidth > 128 * 1024) {
501 lpszFormat = "Bad width";
502 nMaxLen = 10;
503 break;
504 }
505 int nPrecision = 0;
506 if (*lpsz == '.') {
507 lpsz++;
508 if (*lpsz == '*') {
509 nPrecision = va_arg(argList, int);
510 lpsz++;
511 } else {
512 nPrecision = FXSYS_atoi(lpsz);
513 while (std::isdigit(*lpsz))
514 lpsz++;
515 }
516 }
517 if (nPrecision < 0 || nPrecision > 128 * 1024) {
518 lpszFormat = "Bad precision";
519 nMaxLen = 14;
520 break;
521 }
522 int nModifier = 0;
523 if (FXSYS_strncmp(lpsz, "I64", 3) == 0) {
524 lpsz += 3;
525 nModifier = FORCE_INT64;
526 } else {
527 switch (*lpsz) {
528 case 'h':
529 nModifier = FORCE_ANSI;
530 lpsz++;
531 break;
532 case 'l':
533 nModifier = FORCE_UNICODE;
534 lpsz++;
535 break;
536 case 'F':
537 case 'N':
538 case 'L':
539 lpsz++;
540 break;
541 }
542 }
543 switch (*lpsz | nModifier) {
544 case 'c':
545 case 'C':
546 nItemLen = 2;
547 va_arg(argList, int);
548 break;
549 case 'c' | FORCE_ANSI:
550 case 'C' | FORCE_ANSI:
551 nItemLen = 2;
552 va_arg(argList, int);
553 break;
554 case 'c' | FORCE_UNICODE:
555 case 'C' | FORCE_UNICODE:
556 nItemLen = 2;
557 va_arg(argList, int);
558 break;
559 case 's': {
560 const FX_CHAR* pstrNextArg = va_arg(argList, const FX_CHAR*);
561 if (pstrNextArg) {
562 nItemLen = FXSYS_strlen(pstrNextArg);
563 if (nItemLen < 1) {
564 nItemLen = 1;
565 }
566 } else {
567 nItemLen = 6;
568 }
569 } break;
570 case 'S': {
571 FX_WCHAR* pstrNextArg = va_arg(argList, FX_WCHAR*);
572 if (pstrNextArg) {
573 nItemLen = FXSYS_wcslen(pstrNextArg);
574 if (nItemLen < 1) {
575 nItemLen = 1;
576 }
577 } else {
578 nItemLen = 6;
579 }
580 } break;
581 case 's' | FORCE_ANSI:
582 case 'S' | FORCE_ANSI: {
583 const FX_CHAR* pstrNextArg = va_arg(argList, const FX_CHAR*);
584 if (pstrNextArg) {
585 nItemLen = FXSYS_strlen(pstrNextArg);
586 if (nItemLen < 1) {
587 nItemLen = 1;
588 }
589 } else {
590 nItemLen = 6;
591 }
592 } break;
593 case 's' | FORCE_UNICODE:
594 case 'S' | FORCE_UNICODE: {
595 FX_WCHAR* pstrNextArg = va_arg(argList, FX_WCHAR*);
596 if (pstrNextArg) {
597 nItemLen = FXSYS_wcslen(pstrNextArg);
598 if (nItemLen < 1) {
599 nItemLen = 1;
600 }
601 } else {
602 nItemLen = 6;
603 }
604 } break;
605 }
606 if (nItemLen != 0) {
607 if (nPrecision != 0 && nItemLen > nPrecision) {
608 nItemLen = nPrecision;
609 }
610 if (nItemLen < nWidth) {
611 nItemLen = nWidth;
612 }
613 } else {
614 switch (*lpsz) {
615 case 'd':
616 case 'i':
617 case 'u':
618 case 'x':
619 case 'X':
620 case 'o':
621 if (nModifier & FORCE_INT64) {
622 va_arg(argList, int64_t);
623 } else {
624 va_arg(argList, int);
625 }
626 nItemLen = 32;
627 if (nItemLen < nWidth + nPrecision) {
628 nItemLen = nWidth + nPrecision;
629 }
630 break;
631 case 'a':
632 case 'A':
633 case 'e':
634 case 'E':
635 case 'g':
636 case 'G':
637 va_arg(argList, double);
638 nItemLen = 128;
639 if (nItemLen < nWidth + nPrecision) {
640 nItemLen = nWidth + nPrecision;
641 }
642 break;
643 case 'f':
644 if (nWidth + nPrecision > 100) {
645 nItemLen = nPrecision + nWidth + 128;
646 } else {
647 char pszTemp[256];
648 double f = va_arg(argList, double);
649 memset(pszTemp, 0, sizeof(pszTemp));
650 FXSYS_snprintf(pszTemp, sizeof(pszTemp) - 1, "%*.*f", nWidth,
651 nPrecision + 6, f);
652 nItemLen = FXSYS_strlen(pszTemp);
653 }
654 break;
655 case 'p':
656 va_arg(argList, void*);
657 nItemLen = 32;
658 if (nItemLen < nWidth + nPrecision) {
659 nItemLen = nWidth + nPrecision;
660 }
661 break;
662 case 'n':
663 va_arg(argList, int*);
664 break;
665 }
666 }
667 nMaxLen += nItemLen;
668 }
669 nMaxLen += 32; // Fudge factor.
670 GetBuffer(nMaxLen);
671 if (m_pData) {
672 memset(m_pData->m_String, 0, nMaxLen);
673 FXSYS_vsnprintf(m_pData->m_String, nMaxLen - 1, lpszFormat, argListSave);
674 ReleaseBuffer();
675 }
676 va_end(argListSave);
677 }
Format(const FX_CHAR * lpszFormat,...)678 void CFX_ByteString::Format(const FX_CHAR* lpszFormat, ...) {
679 va_list argList;
680 va_start(argList, lpszFormat);
681 FormatV(lpszFormat, argList);
682 va_end(argList);
683 }
Insert(FX_STRSIZE nIndex,FX_CHAR ch)684 FX_STRSIZE CFX_ByteString::Insert(FX_STRSIZE nIndex, FX_CHAR ch) {
685 CopyBeforeWrite();
686 if (nIndex < 0) {
687 nIndex = 0;
688 }
689 FX_STRSIZE nNewLength = m_pData ? m_pData->m_nDataLength : 0;
690 if (nIndex > nNewLength) {
691 nIndex = nNewLength;
692 }
693 nNewLength++;
694 if (!m_pData || m_pData->m_nAllocLength < nNewLength) {
695 StringData* pOldData = m_pData;
696 const FX_CHAR* pstr = m_pData->m_String;
697 m_pData = StringData::Create(nNewLength);
698 if (!m_pData) {
699 return 0;
700 }
701 if (pOldData) {
702 FXSYS_memmove(m_pData->m_String, pstr, (pOldData->m_nDataLength + 1));
703 pOldData->Release();
704 } else {
705 m_pData->m_String[0] = 0;
706 }
707 }
708 FXSYS_memmove(m_pData->m_String + nIndex + 1, m_pData->m_String + nIndex,
709 (nNewLength - nIndex));
710 m_pData->m_String[nIndex] = ch;
711 m_pData->m_nDataLength = nNewLength;
712 return nNewLength;
713 }
Right(FX_STRSIZE nCount) const714 CFX_ByteString CFX_ByteString::Right(FX_STRSIZE nCount) const {
715 if (!m_pData) {
716 return CFX_ByteString();
717 }
718 if (nCount < 0) {
719 nCount = 0;
720 }
721 if (nCount >= m_pData->m_nDataLength) {
722 return *this;
723 }
724 CFX_ByteString dest;
725 AllocCopy(dest, nCount, m_pData->m_nDataLength - nCount);
726 return dest;
727 }
Left(FX_STRSIZE nCount) const728 CFX_ByteString CFX_ByteString::Left(FX_STRSIZE nCount) const {
729 if (!m_pData) {
730 return CFX_ByteString();
731 }
732 if (nCount < 0) {
733 nCount = 0;
734 }
735 if (nCount >= m_pData->m_nDataLength) {
736 return *this;
737 }
738 CFX_ByteString dest;
739 AllocCopy(dest, nCount, 0);
740 return dest;
741 }
Find(FX_CHAR ch,FX_STRSIZE nStart) const742 FX_STRSIZE CFX_ByteString::Find(FX_CHAR ch, FX_STRSIZE nStart) const {
743 if (!m_pData) {
744 return -1;
745 }
746 FX_STRSIZE nLength = m_pData->m_nDataLength;
747 if (nStart >= nLength) {
748 return -1;
749 }
750 const FX_CHAR* lpsz = FXSYS_strchr(m_pData->m_String + nStart, ch);
751 return lpsz ? (int)(lpsz - m_pData->m_String) : -1;
752 }
ReverseFind(FX_CHAR ch) const753 FX_STRSIZE CFX_ByteString::ReverseFind(FX_CHAR ch) const {
754 if (!m_pData) {
755 return -1;
756 }
757 FX_STRSIZE nLength = m_pData->m_nDataLength;
758 while (nLength) {
759 if (m_pData->m_String[nLength - 1] == ch) {
760 return nLength - 1;
761 }
762 nLength--;
763 }
764 return -1;
765 }
FX_strstr(const FX_CHAR * str1,int len1,const FX_CHAR * str2,int len2)766 const FX_CHAR* FX_strstr(const FX_CHAR* str1,
767 int len1,
768 const FX_CHAR* str2,
769 int len2) {
770 if (len2 > len1 || len2 == 0) {
771 return NULL;
772 }
773 const FX_CHAR* end_ptr = str1 + len1 - len2;
774 while (str1 <= end_ptr) {
775 int i = 0;
776 while (1) {
777 if (str1[i] != str2[i]) {
778 break;
779 }
780 i++;
781 if (i == len2) {
782 return str1;
783 }
784 }
785 str1++;
786 }
787 return NULL;
788 }
Find(const CFX_ByteStringC & lpszSub,FX_STRSIZE nStart) const789 FX_STRSIZE CFX_ByteString::Find(const CFX_ByteStringC& lpszSub,
790 FX_STRSIZE nStart) const {
791 if (!m_pData) {
792 return -1;
793 }
794 FX_STRSIZE nLength = m_pData->m_nDataLength;
795 if (nStart > nLength) {
796 return -1;
797 }
798 const FX_CHAR* lpsz =
799 FX_strstr(m_pData->m_String + nStart, m_pData->m_nDataLength - nStart,
800 lpszSub.GetCStr(), lpszSub.GetLength());
801 return lpsz ? (int)(lpsz - m_pData->m_String) : -1;
802 }
MakeLower()803 void CFX_ByteString::MakeLower() {
804 if (!m_pData) {
805 return;
806 }
807 CopyBeforeWrite();
808 if (GetLength() < 1) {
809 return;
810 }
811 FXSYS_strlwr(m_pData->m_String);
812 }
MakeUpper()813 void CFX_ByteString::MakeUpper() {
814 if (!m_pData) {
815 return;
816 }
817 CopyBeforeWrite();
818 if (GetLength() < 1) {
819 return;
820 }
821 FXSYS_strupr(m_pData->m_String);
822 }
Remove(FX_CHAR chRemove)823 FX_STRSIZE CFX_ByteString::Remove(FX_CHAR chRemove) {
824 if (!m_pData) {
825 return 0;
826 }
827 CopyBeforeWrite();
828 if (GetLength() < 1) {
829 return 0;
830 }
831 FX_CHAR* pstrSource = m_pData->m_String;
832 FX_CHAR* pstrDest = m_pData->m_String;
833 FX_CHAR* pstrEnd = m_pData->m_String + m_pData->m_nDataLength;
834 while (pstrSource < pstrEnd) {
835 if (*pstrSource != chRemove) {
836 *pstrDest = *pstrSource;
837 pstrDest++;
838 }
839 pstrSource++;
840 }
841 *pstrDest = 0;
842 FX_STRSIZE nCount = (FX_STRSIZE)(pstrSource - pstrDest);
843 m_pData->m_nDataLength -= nCount;
844 return nCount;
845 }
Replace(const CFX_ByteStringC & lpszOld,const CFX_ByteStringC & lpszNew)846 FX_STRSIZE CFX_ByteString::Replace(const CFX_ByteStringC& lpszOld,
847 const CFX_ByteStringC& lpszNew) {
848 if (!m_pData) {
849 return 0;
850 }
851 if (lpszOld.IsEmpty()) {
852 return 0;
853 }
854 FX_STRSIZE nSourceLen = lpszOld.GetLength();
855 FX_STRSIZE nReplacementLen = lpszNew.GetLength();
856 FX_STRSIZE nCount = 0;
857 const FX_CHAR* pStart = m_pData->m_String;
858 FX_CHAR* pEnd = m_pData->m_String + m_pData->m_nDataLength;
859 while (1) {
860 const FX_CHAR* pTarget = FX_strstr(pStart, (FX_STRSIZE)(pEnd - pStart),
861 lpszOld.GetCStr(), nSourceLen);
862 if (!pTarget) {
863 break;
864 }
865 nCount++;
866 pStart = pTarget + nSourceLen;
867 }
868 if (nCount == 0) {
869 return 0;
870 }
871 FX_STRSIZE nNewLength =
872 m_pData->m_nDataLength + (nReplacementLen - nSourceLen) * nCount;
873 if (nNewLength == 0) {
874 Empty();
875 return nCount;
876 }
877 StringData* pNewData = StringData::Create(nNewLength);
878 if (!pNewData) {
879 return 0;
880 }
881 pStart = m_pData->m_String;
882 FX_CHAR* pDest = pNewData->m_String;
883 for (FX_STRSIZE i = 0; i < nCount; i++) {
884 const FX_CHAR* pTarget = FX_strstr(pStart, (FX_STRSIZE)(pEnd - pStart),
885 lpszOld.GetCStr(), nSourceLen);
886 FXSYS_memcpy(pDest, pStart, pTarget - pStart);
887 pDest += pTarget - pStart;
888 FXSYS_memcpy(pDest, lpszNew.GetCStr(), lpszNew.GetLength());
889 pDest += lpszNew.GetLength();
890 pStart = pTarget + nSourceLen;
891 }
892 FXSYS_memcpy(pDest, pStart, pEnd - pStart);
893 m_pData->Release();
894 m_pData = pNewData;
895 return nCount;
896 }
SetAt(FX_STRSIZE nIndex,FX_CHAR ch)897 void CFX_ByteString::SetAt(FX_STRSIZE nIndex, FX_CHAR ch) {
898 if (!m_pData) {
899 return;
900 }
901 FXSYS_assert(nIndex >= 0);
902 FXSYS_assert(nIndex < m_pData->m_nDataLength);
903 CopyBeforeWrite();
904 m_pData->m_String[nIndex] = ch;
905 }
UTF8Decode() const906 CFX_WideString CFX_ByteString::UTF8Decode() const {
907 CFX_UTF8Decoder decoder;
908 for (FX_STRSIZE i = 0; i < GetLength(); i++) {
909 decoder.Input((uint8_t)m_pData->m_String[i]);
910 }
911 return decoder.GetResult();
912 }
FromUnicode(const FX_WCHAR * str,FX_STRSIZE len)913 CFX_ByteString CFX_ByteString::FromUnicode(const FX_WCHAR* str,
914 FX_STRSIZE len) {
915 if (len < 0) {
916 len = FXSYS_wcslen(str);
917 }
918 CFX_ByteString bstr;
919 bstr.ConvertFrom(CFX_WideString(str, len));
920 return bstr;
921 }
FromUnicode(const CFX_WideString & str)922 CFX_ByteString CFX_ByteString::FromUnicode(const CFX_WideString& str) {
923 return FromUnicode(str.c_str(), str.GetLength());
924 }
ConvertFrom(const CFX_WideString & str,CFX_CharMap * pCharMap)925 void CFX_ByteString::ConvertFrom(const CFX_WideString& str,
926 CFX_CharMap* pCharMap) {
927 if (!pCharMap) {
928 pCharMap = CFX_CharMap::GetDefaultMapper();
929 }
930 *this = (*pCharMap->m_GetByteString)(pCharMap, str);
931 }
Compare(const CFX_ByteStringC & str) const932 int CFX_ByteString::Compare(const CFX_ByteStringC& str) const {
933 if (!m_pData) {
934 return str.IsEmpty() ? 0 : -1;
935 }
936 int this_len = m_pData->m_nDataLength;
937 int that_len = str.GetLength();
938 int min_len = this_len < that_len ? this_len : that_len;
939 for (int i = 0; i < min_len; i++) {
940 if ((uint8_t)m_pData->m_String[i] < str.GetAt(i)) {
941 return -1;
942 }
943 if ((uint8_t)m_pData->m_String[i] > str.GetAt(i)) {
944 return 1;
945 }
946 }
947 if (this_len < that_len) {
948 return -1;
949 }
950 if (this_len > that_len) {
951 return 1;
952 }
953 return 0;
954 }
TrimRight(const CFX_ByteStringC & lpszTargets)955 void CFX_ByteString::TrimRight(const CFX_ByteStringC& lpszTargets) {
956 if (!m_pData || lpszTargets.IsEmpty()) {
957 return;
958 }
959 CopyBeforeWrite();
960 FX_STRSIZE pos = GetLength();
961 if (pos < 1) {
962 return;
963 }
964 while (pos) {
965 FX_STRSIZE i = 0;
966 while (i < lpszTargets.GetLength() &&
967 lpszTargets[i] != m_pData->m_String[pos - 1]) {
968 i++;
969 }
970 if (i == lpszTargets.GetLength()) {
971 break;
972 }
973 pos--;
974 }
975 if (pos < m_pData->m_nDataLength) {
976 m_pData->m_String[pos] = 0;
977 m_pData->m_nDataLength = pos;
978 }
979 }
TrimRight(FX_CHAR chTarget)980 void CFX_ByteString::TrimRight(FX_CHAR chTarget) {
981 TrimRight(CFX_ByteStringC(chTarget));
982 }
TrimRight()983 void CFX_ByteString::TrimRight() {
984 TrimRight("\x09\x0a\x0b\x0c\x0d\x20");
985 }
TrimLeft(const CFX_ByteStringC & lpszTargets)986 void CFX_ByteString::TrimLeft(const CFX_ByteStringC& lpszTargets) {
987 if (!m_pData) {
988 return;
989 }
990 if (lpszTargets.IsEmpty()) {
991 return;
992 }
993 CopyBeforeWrite();
994 FX_STRSIZE len = GetLength();
995 if (len < 1) {
996 return;
997 }
998 FX_STRSIZE pos = 0;
999 while (pos < len) {
1000 FX_STRSIZE i = 0;
1001 while (i < lpszTargets.GetLength() &&
1002 lpszTargets[i] != m_pData->m_String[pos]) {
1003 i++;
1004 }
1005 if (i == lpszTargets.GetLength()) {
1006 break;
1007 }
1008 pos++;
1009 }
1010 if (pos) {
1011 FX_STRSIZE nDataLength = len - pos;
1012 FXSYS_memmove(m_pData->m_String, m_pData->m_String + pos,
1013 (nDataLength + 1) * sizeof(FX_CHAR));
1014 m_pData->m_nDataLength = nDataLength;
1015 }
1016 }
TrimLeft(FX_CHAR chTarget)1017 void CFX_ByteString::TrimLeft(FX_CHAR chTarget) {
1018 TrimLeft(CFX_ByteStringC(chTarget));
1019 }
TrimLeft()1020 void CFX_ByteString::TrimLeft() {
1021 TrimLeft("\x09\x0a\x0b\x0c\x0d\x20");
1022 }
GetID(FX_STRSIZE start_pos) const1023 FX_DWORD CFX_ByteString::GetID(FX_STRSIZE start_pos) const {
1024 return CFX_ByteStringC(*this).GetID(start_pos);
1025 }
GetID(FX_STRSIZE start_pos) const1026 FX_DWORD CFX_ByteStringC::GetID(FX_STRSIZE start_pos) const {
1027 if (m_Length == 0) {
1028 return 0;
1029 }
1030 if (start_pos < 0 || start_pos >= m_Length) {
1031 return 0;
1032 }
1033 FX_DWORD strid = 0;
1034 if (start_pos + 4 > m_Length) {
1035 for (FX_STRSIZE i = 0; i < m_Length - start_pos; i++) {
1036 strid = strid * 256 + m_Ptr[start_pos + i];
1037 }
1038 strid = strid << ((4 - m_Length + start_pos) * 8);
1039 } else {
1040 for (int i = 0; i < 4; i++) {
1041 strid = strid * 256 + m_Ptr[start_pos + i];
1042 }
1043 }
1044 return strid;
1045 }
FX_ftoa(FX_FLOAT d,FX_CHAR * buf)1046 FX_STRSIZE FX_ftoa(FX_FLOAT d, FX_CHAR* buf) {
1047 buf[0] = '0';
1048 buf[1] = '\0';
1049 if (d == 0.0f) {
1050 return 1;
1051 }
1052 FX_BOOL bNegative = FALSE;
1053 if (d < 0) {
1054 bNegative = TRUE;
1055 d = -d;
1056 }
1057 int scale = 1;
1058 int scaled = FXSYS_round(d);
1059 while (scaled < 100000) {
1060 if (scale == 1000000) {
1061 break;
1062 }
1063 scale *= 10;
1064 scaled = FXSYS_round(d * scale);
1065 }
1066 if (scaled == 0) {
1067 return 1;
1068 }
1069 char buf2[32];
1070 int buf_size = 0;
1071 if (bNegative) {
1072 buf[buf_size++] = '-';
1073 }
1074 int i = scaled / scale;
1075 FXSYS_itoa(i, buf2, 10);
1076 FX_STRSIZE len = FXSYS_strlen(buf2);
1077 FXSYS_memcpy(buf + buf_size, buf2, len);
1078 buf_size += len;
1079 int fraction = scaled % scale;
1080 if (fraction == 0) {
1081 return buf_size;
1082 }
1083 buf[buf_size++] = '.';
1084 scale /= 10;
1085 while (fraction) {
1086 buf[buf_size++] = '0' + fraction / scale;
1087 fraction %= scale;
1088 scale /= 10;
1089 }
1090 return buf_size;
1091 }
FormatFloat(FX_FLOAT d,int precision)1092 CFX_ByteString CFX_ByteString::FormatFloat(FX_FLOAT d, int precision) {
1093 FX_CHAR buf[32];
1094 FX_STRSIZE len = FX_ftoa(d, buf);
1095 return CFX_ByteString(buf, len);
1096 }
1097