The Tor Browser: xpcom/glue/nsStringAPI.cpp@129ffea94266

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

     1 /* vim:set ts=2 sw=2 et cindent: */

     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/. */

     6 #include "nscore.h"

     7 #include "nsCRTGlue.h"

     8 #include "prprf.h"

     9 #include "nsStringAPI.h"

    10 #include "nsXPCOMStrings.h"

    11 #include "nsDebug.h"

    13 #include <stdio.h>

    15 #ifdef XP_WIN

    16 #define snprintf _snprintf

    17 #endif

    19 // nsAString

    21 uint32_t

    22 nsAString::BeginReading(const char_type **begin, const char_type **end) const

    23 {

    24   uint32_t len = NS_StringGetData(*this, begin);

    25   if (end)

    26     *end = *begin + len;

    28   return len;

    29 }

    31 const nsAString::char_type*

    32 nsAString::BeginReading() const

    33 {

    34   const char_type *data;

    35   NS_StringGetData(*this, &data);

    36   return data;

    37 }

    39 const nsAString::char_type*

    40 nsAString::EndReading() const

    41 {

    42   const char_type *data;

    43   uint32_t len = NS_StringGetData(*this, &data);

    44   return data + len;

    45 }

    47 uint32_t

    48 nsAString::BeginWriting(char_type **begin, char_type **end, uint32_t newSize)

    49 {

    50   uint32_t len = NS_StringGetMutableData(*this, newSize, begin);

    51   if (end)

    52     *end = *begin + len;

    54   return len;

    55 }

    57 nsAString::char_type*

    58 nsAString::BeginWriting(uint32_t aLen)

    59 {

    60   char_type *data;

    61   NS_StringGetMutableData(*this, aLen, &data);

    62   return data;

    63 }

    65 nsAString::char_type*

    66 nsAString::EndWriting()

    67 {

    68   char_type *data;

    69   uint32_t len = NS_StringGetMutableData(*this, UINT32_MAX, &data);

    70   return data + len;

    71 }

    73 bool

    74 nsAString::SetLength(uint32_t aLen)

    75 {

    76   char_type *data;

    77   NS_StringGetMutableData(*this, aLen, &data);

    78   return data != nullptr;

    79 }

    81 void

    82 nsAString::AssignLiteral(const char *aStr)

    83 {

    84   uint32_t len = strlen(aStr);

    85   char16_t *buf = BeginWriting(len);

    86   if (!buf)

    87     return;

    89   for (; *aStr; ++aStr, ++buf)

    90     *buf = *aStr;

    91 }

    93 void

    94 nsAString::AppendLiteral(const char *aASCIIStr)

    95 {

    96   uint32_t appendLen = strlen(aASCIIStr);

    98   uint32_t thisLen = Length();

    99   char16_t *begin, *end;

   100   BeginWriting(&begin, &end, appendLen + thisLen);

   101   if (!begin)

   102     return;

   104   for (begin += thisLen; begin < end; ++begin, ++aASCIIStr)

   105     *begin = *aASCIIStr;

   106 }

   108 void

   109 nsAString::StripChars(const char *aSet)

   110 {

   111   nsString copy(*this);

   113   const char_type *source, *sourceEnd;

   114   copy.BeginReading(&source, &sourceEnd);

   116   char_type *dest;

   117   BeginWriting(&dest);

   118   if (!dest)

   119     return;

   121   char_type *curDest = dest;

   123   for (; source < sourceEnd; ++source) {

   124     const char *test;

   125     for (test = aSet; *test; ++test) {

   126       if (*source == char_type(*test))

   127         break;

   128     }

   130     if (!*test) {

   131       // not stripped, copy this char

   132       *curDest = *source;

   133       ++curDest;

   134     }

   135   }

   137   SetLength(curDest - dest);

   138 }

   140 void

   141 nsAString::Trim(const char *aSet, bool aLeading, bool aTrailing)

   142 {

   143   NS_ASSERTION(aLeading || aTrailing, "Ineffective Trim");

   145   const char16_t *start, *end;

   146   uint32_t cutLen;

   148   if (aLeading) {

   149     BeginReading(&start, &end);

   150     for (cutLen = 0; start < end; ++start, ++cutLen) {

   151       const char *test;

   152       for (test = aSet; *test; ++test) {

   153         if (*test == *start)

   154           break;

   155       }

   156       if (!*test)

   157         break;

   158     }

   159     if (cutLen) {

   160       NS_StringCutData(*this, 0, cutLen);

   161     }

   162   }

   163   if (aTrailing) {

   164     uint32_t len = BeginReading(&start, &end);

   165     --end;

   166     for (cutLen = 0; end >= start; --end, ++cutLen) {

   167       const char *test;

   168       for (test = aSet; *test; ++test) {

   169         if (*test == *end)

   170           break;

   171       }

   172       if (!*test)

   173         break;

   174     }

   175     if (cutLen) {

   176       NS_StringCutData(*this, len - cutLen, cutLen);

   177     }

   178   }

   179 }

   181 int32_t

   182 nsAString::DefaultComparator(const char_type *a, const char_type *b,

   183                              uint32_t len)

   184 {

   185   for (const char_type *end = a + len; a < end; ++a, ++b) {

   186     if (*a == *b)

   187       continue;

   189     return *a < *b ? -1 : 1;

   190   }

   192   return 0;

   193 }

   195 int32_t

   196 nsAString::Compare(const char_type *other, ComparatorFunc c) const

   197 {

   198   const char_type *cself;

   199   uint32_t selflen = NS_StringGetData(*this, &cself);

   200   uint32_t otherlen = NS_strlen(other);

   201   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;

   203   int32_t result = c(cself, other, comparelen);

   204   if (result == 0) {

   205     if (selflen < otherlen)

   206       return -1;

   207     else if (selflen > otherlen)

   208       return 1;

   209   }

   210   return result;

   211 }

   213 int32_t

   214 nsAString::Compare(const self_type &other, ComparatorFunc c) const

   215 {

   216   const char_type *cself, *cother;

   217   uint32_t selflen = NS_StringGetData(*this, &cself);

   218   uint32_t otherlen = NS_StringGetData(other, &cother);

   219   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;

   221   int32_t result = c(cself, cother, comparelen);

   222   if (result == 0) {

   223     if (selflen < otherlen)

   224       return -1;

   225     else if (selflen > otherlen)

   226       return 1;

   227   }

   228   return result;

   229 }

   231 bool

   232 nsAString::Equals(const char_type *other, ComparatorFunc c) const

   233 {

   234   const char_type *cself;

   235   uint32_t selflen = NS_StringGetData(*this, &cself);

   236   uint32_t otherlen = NS_strlen(other);

   238   if (selflen != otherlen)

   239     return false;

   241   return c(cself, other, selflen) == 0;

   242 }

   244 bool

   245 nsAString::Equals(const self_type &other, ComparatorFunc c) const

   246 {

   247   const char_type *cself;

   248   const char_type *cother;

   249   uint32_t selflen = NS_StringGetData(*this, &cself);

   250   uint32_t otherlen = NS_StringGetData(other, &cother);

   252   if (selflen != otherlen)

   253     return false;

   255   return c(cself, cother, selflen) == 0;

   256 }

   258 bool

   259 nsAString::EqualsLiteral(const char *aASCIIString) const

   260 {

   261   const char16_t *begin, *end;

   262   BeginReading(&begin, &end);

   264   for (; begin < end; ++begin, ++aASCIIString) {

   265     if (!*aASCIIString || !NS_IsAscii(*begin) ||

   266         (char) *begin != *aASCIIString) {

   267       return false;

   268     }

   269   }

   271   return *aASCIIString == '\0';

   272 }

   274 bool

   275 nsAString::LowerCaseEqualsLiteral(const char *aASCIIString) const

   276 {

   277   const char16_t *begin, *end;

   278   BeginReading(&begin, &end);

   280   for (; begin < end; ++begin, ++aASCIIString) {

   281     if (!*aASCIIString || !NS_IsAscii(*begin) ||

   282         NS_ToLower((char) *begin) != *aASCIIString) {

   283       return false;

   284     }

   285   }

   287   return *aASCIIString == '\0';

   288 }

   290 int32_t

   291 nsAString::Find(const self_type& aStr, uint32_t aOffset,

   292                 ComparatorFunc c) const

   293 {

   294   const char_type *begin, *end;

   295   uint32_t selflen = BeginReading(&begin, &end);

   297   if (aOffset > selflen)

   298     return -1;

   300   const char_type *other;

   301   uint32_t otherlen = aStr.BeginReading(&other);

   303   if (otherlen > selflen - aOffset)

   304     return -1;

   306   // We want to stop searching otherlen characters before the end of the string

   307   end -= otherlen;

   309   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {

   310     if (!c(cur, other, otherlen))

   311       return cur - begin;

   312   }

   313   return -1;

   314 }

   316 static bool ns_strnmatch(const char16_t *aStr, const char* aSubstring,

   317                            uint32_t aLen)

   318 {

   319   for (; aLen; ++aStr, ++aSubstring, --aLen) {

   320     if (!NS_IsAscii(*aStr))

   321       return false;

   323     if ((char) *aStr != *aSubstring)

   324       return false;

   325   }

   327   return true;

   328 }

   330 static bool ns_strnimatch(const char16_t *aStr, const char* aSubstring,

   331                             uint32_t aLen)

   332 {

   333   for (; aLen; ++aStr, ++aSubstring, --aLen) {

   334     if (!NS_IsAscii(*aStr))

   335       return false;

   337     if (NS_ToLower((char) *aStr) != NS_ToLower(*aSubstring))

   338       return false;

   339   }

   341   return true;

   342 }

   344 int32_t

   345 nsAString::Find(const char *aStr, uint32_t aOffset, bool aIgnoreCase) const

   346 {

   347   bool (*match)(const char16_t*, const char*, uint32_t) =

   348     aIgnoreCase ? ns_strnimatch : ns_strnmatch;

   350   const char_type *begin, *end;

   351   uint32_t selflen = BeginReading(&begin, &end);

   353   if (aOffset > selflen)

   354     return -1;

   356   uint32_t otherlen = strlen(aStr);

   358   if (otherlen > selflen - aOffset)

   359     return -1;

   361   // We want to stop searching otherlen characters before the end of the string

   362   end -= otherlen;

   364   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {

   365     if (match(cur, aStr, otherlen)) {

   366       return cur - begin;

   367     }

   368   }

   369   return -1;

   370 }

   372 int32_t

   373 nsAString::RFind(const self_type& aStr, int32_t aOffset, ComparatorFunc c) const

   374 {

   375   const char_type *begin, *end;

   376   uint32_t selflen = BeginReading(&begin, &end);

   378   const char_type *other;

   379   uint32_t otherlen = aStr.BeginReading(&other);

   381   if (selflen < otherlen)

   382     return -1;

   384   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))

   385     end -= otherlen;

   386   else

   387     end = begin + aOffset;

   389   for (const char_type *cur = end; cur >= begin; --cur) {

   390     if (!c(cur, other, otherlen))

   391       return cur - begin;

   392   }

   393   return -1;

   394 }

   396 int32_t

   397 nsAString::RFind(const char *aStr, int32_t aOffset, bool aIgnoreCase) const

   398 {

   399   bool (*match)(const char16_t*, const char*, uint32_t) =

   400     aIgnoreCase ? ns_strnimatch : ns_strnmatch;

   402   const char_type *begin, *end;

   403   uint32_t selflen = BeginReading(&begin, &end);

   404   uint32_t otherlen = strlen(aStr);

   406   if (selflen < otherlen)

   407     return -1;

   409   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))

   410     end -= otherlen;

   411   else

   412     end = begin + aOffset;

   414   for (const char_type *cur = end; cur >= begin; --cur) {

   415     if (match(cur, aStr, otherlen)) {

   416       return cur - begin;

   417     }

   418   }

   419   return -1;

   420 }

   422 int32_t

   423 nsAString::FindChar(char_type aChar, uint32_t aOffset) const

   424 {

   425   const char_type *start, *end;

   426   uint32_t len = BeginReading(&start, &end);

   427   if (aOffset > len)

   428     return -1;

   430   const char_type *cur;

   432   for (cur = start + aOffset; cur < end; ++cur) {

   433     if (*cur == aChar)

   434       return cur - start;

   435   }

   437   return -1;

   438 }

   440 int32_t

   441 nsAString::RFindChar(char_type aChar) const

   442 {

   443   const char16_t *start, *end;

   444   BeginReading(&start, &end);

   446   do {

   447     --end;

   449     if (*end == aChar)

   450       return end - start;

   452   } while (end >= start);

   454   return -1;

   455 }

   457 void

   458 nsAString::AppendInt(int aInt, int32_t aRadix)

   459 {

   460   const char *fmt;

   461   switch (aRadix) {

   462   case 8:

   463     fmt = "%o";

   464     break;

   466   case 10:

   467     fmt = "%d";

   468     break;

   470   case 16:

   471     fmt = "%x";

   472     break;

   474   default:

   475     NS_ERROR("Unrecognized radix");

   476     fmt = "";

   477   };

   479   char buf[20];

   480   int len = snprintf(buf, sizeof(buf), fmt, aInt);

   481   buf[sizeof(buf) - 1] = '\0';

   483   Append(NS_ConvertASCIItoUTF16(buf, len));

   484 }

   486 // Strings

   488 #ifndef XPCOM_GLUE_AVOID_NSPR

   489 int32_t

   490 nsAString::ToInteger(nsresult *aErrorCode, uint32_t aRadix) const

   491 {

   492   NS_ConvertUTF16toUTF8 narrow(*this);

   494   const char *fmt;

   495   switch (aRadix) {

   496   case 10:

   497     fmt = "%i";

   498     break;

   500   case 16:

   501     fmt = "%x";

   502     break;

   504   default:

   505     NS_ERROR("Unrecognized radix!");

   506     *aErrorCode = NS_ERROR_INVALID_ARG;

   507     return 0;

   508   }

   510   int32_t result = 0;

   511   if (PR_sscanf(narrow.get(), fmt, &result) == 1)

   512     *aErrorCode = NS_OK;

   513   else

   514     *aErrorCode = NS_ERROR_FAILURE;

   516   return result;

   517 }

   519 int64_t

   520 nsAString::ToInteger64(nsresult *aErrorCode, uint32_t aRadix) const

   521 {

   522   NS_ConvertUTF16toUTF8 narrow(*this);

   524   const char *fmt;

   525   switch (aRadix) {

   526   case 10:

   527     fmt = "%lli";

   528     break;

   530   case 16:

   531     fmt = "%llx";

   532     break;

   534   default:

   535     NS_ERROR("Unrecognized radix!");

   536     *aErrorCode = NS_ERROR_INVALID_ARG;

   537     return 0;

   538   }

   540   int64_t result = 0;

   541   if (PR_sscanf(narrow.get(), fmt, &result) == 1)

   542     *aErrorCode = NS_OK;

   543   else

   544     *aErrorCode = NS_ERROR_FAILURE;

   546   return result;

   547 }

   548 #endif // XPCOM_GLUE_AVOID_NSPR

   550 // nsACString

   552 uint32_t

   553 nsACString::BeginReading(const char_type **begin, const char_type **end) const

   554 {

   555   uint32_t len = NS_CStringGetData(*this, begin);

   556   if (end)

   557     *end = *begin + len;

   559   return len;

   560 }

   562 const nsACString::char_type*

   563 nsACString::BeginReading() const

   564 {

   565   const char_type *data;

   566   NS_CStringGetData(*this, &data);

   567   return data;

   568 }

   570 const nsACString::char_type*

   571 nsACString::EndReading() const

   572 {

   573   const char_type *data;

   574   uint32_t len = NS_CStringGetData(*this, &data);

   575   return data + len;

   576 }

   578 uint32_t

   579 nsACString::BeginWriting(char_type **begin, char_type **end, uint32_t newSize)

   580 {

   581   uint32_t len = NS_CStringGetMutableData(*this, newSize, begin);

   582   if (end)

   583     *end = *begin + len;

   585   return len;

   586 }

   588 nsACString::char_type*

   589 nsACString::BeginWriting(uint32_t aLen)

   590 {

   591   char_type *data;

   592   NS_CStringGetMutableData(*this, aLen, &data);

   593   return data;

   594 }

   596 nsACString::char_type*

   597 nsACString::EndWriting()

   598 {

   599   char_type *data;

   600   uint32_t len = NS_CStringGetMutableData(*this, UINT32_MAX, &data);

   601   return data + len;

   602 }

   604 bool

   605 nsACString::SetLength(uint32_t aLen)

   606 {

   607   char_type *data;

   608   NS_CStringGetMutableData(*this, aLen, &data);

   609   return data != nullptr;

   610 }

   612 void

   613 nsACString::StripChars(const char *aSet)

   614 {

   615   nsCString copy(*this);

   617   const char_type *source, *sourceEnd;

   618   copy.BeginReading(&source, &sourceEnd);

   620   char_type *dest;

   621   BeginWriting(&dest);

   622   if (!dest)

   623     return;

   625   char_type *curDest = dest;

   627   for (; source < sourceEnd; ++source) {

   628     const char *test;

   629     for (test = aSet; *test; ++test) {

   630       if (*source == char_type(*test))

   631         break;

   632     }

   634     if (!*test) {

   635       // not stripped, copy this char

   636       *curDest = *source;

   637       ++curDest;

   638     }

   639   }

   641   SetLength(curDest - dest);

   642 }

   644 void

   645 nsACString::Trim(const char *aSet, bool aLeading, bool aTrailing)

   646 {

   647   NS_ASSERTION(aLeading || aTrailing, "Ineffective Trim");

   649   const char *start, *end;

   650   uint32_t cutLen;

   652   if (aLeading) {

   653     BeginReading(&start, &end);

   654     for (cutLen = 0; start < end; ++start, ++cutLen) {

   655       const char *test;

   656       for (test = aSet; *test; ++test) {

   657         if (*test == *start)

   658           break;

   659       }

   660       if (!*test)

   661         break;

   662     }

   663     if (cutLen) {

   664       NS_CStringCutData(*this, 0, cutLen);

   665     }

   666   }

   667   if (aTrailing) {

   668     uint32_t len = BeginReading(&start, &end);

   669     --end;

   670     for (cutLen = 0; end >= start; --end, ++cutLen) {

   671       const char *test;

   672       for (test = aSet; *test; ++test) {

   673         if (*test == *end)

   674           break;

   675       }

   676       if (!*test)

   677         break;

   678     }

   679     if (cutLen) {

   680       NS_CStringCutData(*this, len - cutLen, cutLen);

   681     }

   682   }

   683 }

   685 int32_t

   686 nsACString::DefaultComparator(const char_type *a, const char_type *b,

   687                               uint32_t len)

   688 {

   689   return memcmp(a, b, len);

   690 }

   692 int32_t

   693 nsACString::Compare(const char_type *other, ComparatorFunc c) const

   694 {

   695   const char_type *cself;

   696   uint32_t selflen = NS_CStringGetData(*this, &cself);

   697   uint32_t otherlen = strlen(other);

   698   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;

   700   int32_t result = c(cself, other, comparelen);

   701   if (result == 0) {

   702     if (selflen < otherlen)

   703       return -1;

   704     else if (selflen > otherlen)

   705       return 1;

   706   }

   707   return result;

   708 }

   710 int32_t

   711 nsACString::Compare(const self_type &other, ComparatorFunc c) const

   712 {

   713   const char_type *cself, *cother;

   714   uint32_t selflen = NS_CStringGetData(*this, &cself);

   715   uint32_t otherlen = NS_CStringGetData(other, &cother);

   716   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;

   718   int32_t result = c(cself, cother, comparelen);

   719   if (result == 0) {

   720     if (selflen < otherlen)

   721       return -1;

   722     else if (selflen > otherlen)

   723       return 1;

   724   }

   725   return result;

   726 }

   728 bool

   729 nsACString::Equals(const char_type *other, ComparatorFunc c) const

   730 {

   731   const char_type *cself;

   732   uint32_t selflen = NS_CStringGetData(*this, &cself);

   733   uint32_t otherlen = strlen(other);

   735   if (selflen != otherlen)

   736     return false;

   738   return c(cself, other, selflen) == 0;

   739 }

   741 bool

   742 nsACString::Equals(const self_type &other, ComparatorFunc c) const

   743 {

   744   const char_type *cself;

   745   const char_type *cother;

   746   uint32_t selflen = NS_CStringGetData(*this, &cself);

   747   uint32_t otherlen = NS_CStringGetData(other, &cother);

   749   if (selflen != otherlen)

   750     return false;

   752   return c(cself, cother, selflen) == 0;

   753 }

   755 int32_t

   756 nsACString::Find(const self_type& aStr, uint32_t aOffset,

   757                  ComparatorFunc c) const

   758 {

   759   const char_type *begin, *end;

   760   uint32_t selflen = BeginReading(&begin, &end);

   762   if (aOffset > selflen)

   763     return -1;

   765   const char_type *other;

   766   uint32_t otherlen = aStr.BeginReading(&other);

   768   if (otherlen > selflen - aOffset)

   769     return -1;

   771   // We want to stop searching otherlen characters before the end of the string

   772   end -= otherlen;

   774   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {

   775     if (!c(cur, other, otherlen))

   776       return cur - begin;

   777   }

   778   return -1;

   779 }

   781 int32_t

   782 nsACString::Find(const char_type *aStr, ComparatorFunc c) const

   783 {

   784   return Find(aStr, strlen(aStr), c);

   785 }

   787 int32_t

   788 nsACString::Find(const char_type *aStr, uint32_t aLen, ComparatorFunc c) const

   789 {

   790   const char_type *begin, *end;

   791   uint32_t selflen = BeginReading(&begin, &end);

   793   if (aLen == 0) {

   794     NS_WARNING("Searching for zero-length string.");

   795     return -1;

   796   }

   798    if (aLen > selflen)

   799     return -1;

   801   // We want to stop searching otherlen characters before the end of the string

   802   end -= aLen;

   804   for (const char_type *cur = begin; cur <= end; ++cur) {

   805     if (!c(cur, aStr, aLen))

   806       return cur - begin;

   807   }

   808   return -1;

   809 }

   811 int32_t

   812 nsACString::RFind(const self_type& aStr, int32_t aOffset, ComparatorFunc c) const

   813 {

   814   const char_type *begin, *end;

   815   uint32_t selflen = BeginReading(&begin, &end);

   817   const char_type *other;

   818   uint32_t otherlen = aStr.BeginReading(&other);

   820   if (selflen < otherlen)

   821     return -1;

   823   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))

   824     end -= otherlen;

   825   else

   826     end = begin + aOffset;

   828   for (const char_type *cur = end; cur >= begin; --cur) {

   829     if (!c(cur, other, otherlen))

   830       return cur - begin;

   831   }

   832   return -1;

   833 }

   835 int32_t

   836 nsACString::RFind(const char_type *aStr, ComparatorFunc c) const

   837 {

   838   return RFind(aStr, strlen(aStr), c);

   839 }

   841 int32_t

   842 nsACString::RFind(const char_type *aStr, int32_t aLen, ComparatorFunc c) const

   843 {

   844   const char_type *begin, *end;

   845   uint32_t selflen = BeginReading(&begin, &end);

   847   if (aLen <= 0) {

   848     NS_WARNING("Searching for zero-length string.");

   849     return -1;

   850   }

   852   if (uint32_t(aLen) > selflen)

   853     return -1;

   855   // We want to start searching otherlen characters before the end of the string

   856   end -= aLen;

   858   for (const char_type *cur = end; cur >= begin; --cur) {

   859     if (!c(cur, aStr, aLen))

   860       return cur - begin;

   861   }

   862   return -1;

   863 }

   865 int32_t

   866 nsACString::FindChar(char_type aChar, uint32_t aOffset) const

   867 {

   868   const char_type *start, *end;

   869   uint32_t len = BeginReading(&start, &end);

   870   if (aOffset > len)

   871     return -1;

   873   const char_type *cur;

   875   for (cur = start + aOffset; cur < end; ++cur) {

   876     if (*cur == aChar)

   877       return cur - start;

   878   }

   880   return -1;

   881 }

   883 int32_t

   884 nsACString::RFindChar(char_type aChar) const

   885 {

   886   const char *start, *end;

   887   BeginReading(&start, &end);

   889   for (; end >= start; --end) {

   890     if (*end == aChar)

   891       return end - start;

   892   }

   894   return -1;

   895 }

   897 void

   898 nsACString::AppendInt(int aInt, int32_t aRadix)

   899 {

   900   const char *fmt;

   901   switch (aRadix) {

   902   case 8:

   903     fmt = "%o";

   904     break;

   906   case 10:

   907     fmt = "%d";

   908     break;

   910   case 16:

   911     fmt = "%x";

   912     break;

   914   default:

   915     NS_ERROR("Unrecognized radix");

   916     fmt = "";

   917   };

   919   char buf[20];

   920   int len = snprintf(buf, sizeof(buf), fmt, aInt);

   921   buf[sizeof(buf) - 1] = '\0';

   923   Append(buf, len);

   924 }

   926 #ifndef XPCOM_GLUE_AVOID_NSPR

   927 int32_t

   928 nsACString::ToInteger(nsresult *aErrorCode, uint32_t aRadix) const

   929 {

   930   const char *fmt;

   931   switch (aRadix) {

   932   case 10:

   933     fmt = "%i";

   934     break;

   936   case 16:

   937     fmt = "%x";

   938     break;

   940   default:

   941     NS_ERROR("Unrecognized radix!");

   942     *aErrorCode = NS_ERROR_INVALID_ARG;

   943     return 0;

   944   }

   946   int32_t result = 0;

   947   if (PR_sscanf(nsCString(*this).get(), fmt, &result) == 1)

   948     *aErrorCode = NS_OK;

   949   else

   950     *aErrorCode = NS_ERROR_FAILURE;

   952   return result;

   953 }

   955 int64_t

   956 nsACString::ToInteger64(nsresult *aErrorCode, uint32_t aRadix) const

   957 {

   958   const char *fmt;

   959   switch (aRadix) {

   960   case 10:

   961     fmt = "%lli";

   962     break;

   964   case 16:

   965     fmt = "%llx";

   966     break;

   968   default:

   969     NS_ERROR("Unrecognized radix!");

   970     *aErrorCode = NS_ERROR_INVALID_ARG;

   971     return 0;

   972   }

   974   int64_t result = 0;

   975   if (PR_sscanf(nsCString(*this).get(), fmt, &result) == 1)

   976     *aErrorCode = NS_OK;

   977   else

   978     *aErrorCode = NS_ERROR_FAILURE;

   980   return result;

   981 }

   982 #endif // XPCOM_GLUE_AVOID_NSPR

   984 // Substrings

   986 nsDependentSubstring::nsDependentSubstring(const abstract_string_type& aStr,

   987                                            uint32_t aStartPos)

   988 {

   989   const char16_t* data;

   990   uint32_t len = NS_StringGetData(aStr, &data);

   992   if (aStartPos > len)

   993     aStartPos = len;

   995   NS_StringContainerInit2(*this, data + aStartPos, len - aStartPos,

   996                           NS_STRING_CONTAINER_INIT_DEPEND |

   997                           NS_STRING_CONTAINER_INIT_SUBSTRING);

   998 }

  1000 nsDependentSubstring::nsDependentSubstring(const abstract_string_type& aStr,

  1001                                            uint32_t aStartPos,

  1002                                            uint32_t aLength)

  1003 {

  1004   const char16_t* data;

  1005   uint32_t len = NS_StringGetData(aStr, &data);

  1007   if (aStartPos > len)

  1008     aStartPos = len;

  1010   if (aStartPos + aLength > len)

  1011     aLength = len - aStartPos;

  1013   NS_StringContainerInit2(*this, data + aStartPos, aLength,

  1014                           NS_STRING_CONTAINER_INIT_DEPEND |

  1015                             NS_STRING_CONTAINER_INIT_SUBSTRING);

  1016 }

  1018 nsDependentCSubstring::nsDependentCSubstring(const abstract_string_type& aStr,

  1019                                              uint32_t aStartPos)

  1020 {

  1021   const char* data;

  1022   uint32_t len = NS_CStringGetData(aStr, &data);

  1024   if (aStartPos > len)

  1025     aStartPos = len;

  1027   NS_CStringContainerInit2(*this, data + aStartPos, len - aStartPos,

  1028                            NS_CSTRING_CONTAINER_INIT_DEPEND |

  1029                            NS_CSTRING_CONTAINER_INIT_SUBSTRING);

  1030 }

  1032 nsDependentCSubstring::nsDependentCSubstring(const abstract_string_type& aStr,

  1033                                              uint32_t aStartPos,

  1034                                              uint32_t aLength)

  1035 {

  1036   const char* data;

  1037   uint32_t len = NS_CStringGetData(aStr, &data);

  1039   if (aStartPos > len)

  1040     aStartPos = len;

  1042   if (aStartPos + aLength > len)

  1043     aLength = len - aStartPos;

  1045   NS_CStringContainerInit2(*this, data + aStartPos, aLength,

  1046                            NS_CSTRING_CONTAINER_INIT_DEPEND |

  1047                            NS_CSTRING_CONTAINER_INIT_SUBSTRING);

  1048 }

  1050 // Utils

  1052 char*

  1053 ToNewUTF8String(const nsAString& aSource)

  1054 {

  1055   nsCString temp;

  1056   CopyUTF16toUTF8(aSource, temp);

  1057   return NS_CStringCloneData(temp);

  1058 }

  1060 void

  1061 CompressWhitespace(nsAString& aString)

  1062 {

  1063   char16_t *start;

  1064   uint32_t len = NS_StringGetMutableData(aString, UINT32_MAX, &start);

  1065   char16_t *end = start + len;

  1066   char16_t *from = start, *to = start;

  1068   // Skip any leading whitespace

  1069   while (from < end && NS_IsAsciiWhitespace(*from))

  1070     from++;

  1072   while (from < end) {

  1073     char16_t theChar = *from++;

  1075     if (NS_IsAsciiWhitespace(theChar)) {

  1076       // We found a whitespace char, so skip over any more

  1077       while (from < end && NS_IsAsciiWhitespace(*from))

  1078         from++;

  1080       // Turn all whitespace into spaces

  1081       theChar = ' ';

  1082     }

  1084     *to++ = theChar;

  1085   }

  1087   // Drop any trailing space

  1088   if (to > start && to[-1] == ' ')

  1089     to--;

  1091   // Re-terminate the string

  1092   *to = '\0';

  1094   // Set the new length

  1095   aString.SetLength(to - start);

  1096 }

  1098 uint32_t

  1099 ToLowerCase(nsACString& aStr)

  1100 {

  1101   char *begin, *end;

  1102   uint32_t len = aStr.BeginWriting(&begin, &end);

  1104   for (; begin < end; ++begin) {

  1105     *begin = NS_ToLower(*begin);

  1106   }

  1108   return len;

  1109 }

  1111 uint32_t

  1112 ToUpperCase(nsACString& aStr)

  1113 {

  1114   char *begin, *end;

  1115   uint32_t len = aStr.BeginWriting(&begin, &end);

  1117   for (; begin < end; ++begin) {

  1118     *begin = NS_ToUpper(*begin);

  1119   }

  1121   return len;

  1122 }

  1124 uint32_t

  1125 ToLowerCase(const nsACString& aSrc, nsACString& aDest)

  1126 {

  1127   const char *begin,  *end;

  1128   uint32_t len = aSrc.BeginReading(&begin, &end);

  1130   char *dest;

  1131   NS_CStringGetMutableData(aDest, len, &dest);

  1133   for (; begin < end; ++begin, ++dest) {

  1134     *dest = NS_ToLower(*begin);

  1135   }

  1137   return len;

  1138 }

  1140 uint32_t

  1141 ToUpperCase(const nsACString& aSrc, nsACString& aDest)

  1142 {

  1143   const char *begin,  *end;

  1144   uint32_t len = aSrc.BeginReading(&begin, &end);

  1146   char *dest;

  1147   NS_CStringGetMutableData(aDest, len, &dest);

  1149   for (; begin < end; ++begin, ++dest) {

  1150     *dest = NS_ToUpper(*begin);

  1151   }

  1153   return len;

  1154 }

  1156 int32_t

  1157 CaseInsensitiveCompare(const char *a, const char *b,

  1158                        uint32_t len)

  1159 {

  1160   for (const char *aend = a + len; a < aend; ++a, ++b) {

  1161     char la = NS_ToLower(*a);

  1162     char lb = NS_ToLower(*b);

  1164     if (la == lb)

  1165       continue;

  1167     return la < lb ? -1 : 1;

  1168   }

  1170   return 0;

  1171 }

  1173 bool

  1174 ParseString(const nsACString& aSource, char aDelimiter,

  1175             nsTArray<nsCString>& aArray)

  1176 {

  1177   int32_t start = 0;

  1178   int32_t end = aSource.Length();

  1180   uint32_t oldLength = aArray.Length();

  1182   for (;;) {

  1183     int32_t delimiter = aSource.FindChar(aDelimiter, start);

  1184     if (delimiter < 0) {

  1185       delimiter = end;

  1186     }

  1188     if (delimiter != start) {

  1189       if (!aArray.AppendElement(Substring(aSource, start, delimiter - start))) {

  1190         aArray.RemoveElementsAt(oldLength, aArray.Length() - oldLength);

  1191         return false;

  1192       }

  1193     }

  1195     if (delimiter == end)

  1196       break;

  1197     start = ++delimiter;

  1198     if (start == end)

  1199       break;

  1200   }

  1202   return true;

  1203 }

The Tor Browser / file revision

xpcom/glue/nsStringAPI.cpp@129ffea94266

xpcom/glue/nsStringAPI.cpp