The Tor Browser: xpcom/glue/nsStringAPI.cpp@6474c204b198 (annotated)

xpcom/glue/nsStringAPI.cpp@6474c204b198 (annotated)

xpcom/glue/nsStringAPI.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* vim:set ts=2 sw=2 et cindent: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "nscore.h"
 #include "nsCRTGlue.h"
 #include "prprf.h"
 #include "nsStringAPI.h"
 #include "nsXPCOMStrings.h"
 #include "nsDebug.h"
 #include <stdio.h>
 #ifdef XP_WIN
 #define snprintf _snprintf
 #endif
 // nsAString
 uint32_t
 nsAString::BeginReading(const char_type **begin, const char_type **end) const
 {
   uint32_t len = NS_StringGetData(*this, begin);
   if (end)
     *end = *begin + len;
   return len;
 }
 const nsAString::char_type*
 nsAString::BeginReading() const
 {
   const char_type *data;
   NS_StringGetData(*this, &data);
   return data;
 }
 const nsAString::char_type*
 nsAString::EndReading() const
 {
   const char_type *data;
   uint32_t len = NS_StringGetData(*this, &data);
   return data + len;
 }
 uint32_t
 nsAString::BeginWriting(char_type **begin, char_type **end, uint32_t newSize)
 {
   uint32_t len = NS_StringGetMutableData(*this, newSize, begin);
   if (end)
     *end = *begin + len;
   return len;
 }
 nsAString::char_type*
 nsAString::BeginWriting(uint32_t aLen)
 {
   char_type *data;
   NS_StringGetMutableData(*this, aLen, &data);
   return data;
 }
 nsAString::char_type*
 nsAString::EndWriting()
 {
   char_type *data;
   uint32_t len = NS_StringGetMutableData(*this, UINT32_MAX, &data);
   return data + len;
 }
 bool
 nsAString::SetLength(uint32_t aLen)
 {
   char_type *data;
   NS_StringGetMutableData(*this, aLen, &data);
   return data != nullptr;
 }
 void
 nsAString::AssignLiteral(const char *aStr)
 {
   uint32_t len = strlen(aStr);
   char16_t *buf = BeginWriting(len);
   if (!buf)
     return;
   for (; *aStr; ++aStr, ++buf)
     *buf = *aStr;
 }
 void
 nsAString::AppendLiteral(const char *aASCIIStr)
 {
   uint32_t appendLen = strlen(aASCIIStr);
   uint32_t thisLen = Length();
   char16_t *begin, *end;
   BeginWriting(&begin, &end, appendLen + thisLen);
   if (!begin)
     return;
   for (begin += thisLen; begin < end; ++begin, ++aASCIIStr)
     *begin = *aASCIIStr;
 }
 void
 nsAString::StripChars(const char *aSet)
 {
   nsString copy(*this);
   const char_type *source, *sourceEnd;
   copy.BeginReading(&source, &sourceEnd);
   char_type *dest;
   BeginWriting(&dest);
   if (!dest)
     return;
   char_type *curDest = dest;
   for (; source < sourceEnd; ++source) {
     const char *test;
     for (test = aSet; *test; ++test) {
       if (*source == char_type(*test))
         break;
     }
     if (!*test) {
       // not stripped, copy this char
       *curDest = *source;
       ++curDest;
     }
   }
   SetLength(curDest - dest);
 }
 void
 nsAString::Trim(const char *aSet, bool aLeading, bool aTrailing)
 {
   NS_ASSERTION(aLeading || aTrailing, "Ineffective Trim");
   const char16_t *start, *end;
   uint32_t cutLen;
   if (aLeading) {
     BeginReading(&start, &end);
     for (cutLen = 0; start < end; ++start, ++cutLen) {
       const char *test;
       for (test = aSet; *test; ++test) {
         if (*test == *start)
           break;
       }
       if (!*test)
         break;
     }
     if (cutLen) {
       NS_StringCutData(*this, 0, cutLen);
     }
   }
   if (aTrailing) {
     uint32_t len = BeginReading(&start, &end);
     --end;
     for (cutLen = 0; end >= start; --end, ++cutLen) {
       const char *test;
       for (test = aSet; *test; ++test) {
         if (*test == *end)
           break;
       }
       if (!*test)
         break;
     }
     if (cutLen) {
       NS_StringCutData(*this, len - cutLen, cutLen);
     }
   }
 }
 int32_t
 nsAString::DefaultComparator(const char_type *a, const char_type *b,
                              uint32_t len)
 {
   for (const char_type *end = a + len; a < end; ++a, ++b) {
     if (*a == *b)
       continue;
     return *a < *b ? -1 : 1;
   }
   return 0;
 }
 int32_t
 nsAString::Compare(const char_type *other, ComparatorFunc c) const
 {
   const char_type *cself;
   uint32_t selflen = NS_StringGetData(*this, &cself);
   uint32_t otherlen = NS_strlen(other);
   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;
   int32_t result = c(cself, other, comparelen);
   if (result == 0) {
     if (selflen < otherlen)
       return -1;
     else if (selflen > otherlen)
       return 1;
   }
   return result;
 }
 int32_t
 nsAString::Compare(const self_type &other, ComparatorFunc c) const
 {
   const char_type *cself, *cother;
   uint32_t selflen = NS_StringGetData(*this, &cself);
   uint32_t otherlen = NS_StringGetData(other, &cother);
   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;
   int32_t result = c(cself, cother, comparelen);
   if (result == 0) {
     if (selflen < otherlen)
       return -1;
     else if (selflen > otherlen)
       return 1;
   }
   return result;
 }
 bool
 nsAString::Equals(const char_type *other, ComparatorFunc c) const
 {
   const char_type *cself;
   uint32_t selflen = NS_StringGetData(*this, &cself);
   uint32_t otherlen = NS_strlen(other);
   if (selflen != otherlen)
     return false;
   return c(cself, other, selflen) == 0;
 }
 bool
 nsAString::Equals(const self_type &other, ComparatorFunc c) const
 {
   const char_type *cself;
   const char_type *cother;
   uint32_t selflen = NS_StringGetData(*this, &cself);
   uint32_t otherlen = NS_StringGetData(other, &cother);
   if (selflen != otherlen)
     return false;
   return c(cself, cother, selflen) == 0;
 }
 bool
 nsAString::EqualsLiteral(const char *aASCIIString) const
 {
   const char16_t *begin, *end;
   BeginReading(&begin, &end);
   for (; begin < end; ++begin, ++aASCIIString) {
     if (!*aASCIIString || !NS_IsAscii(*begin) ||
         (char) *begin != *aASCIIString) {
       return false;
     }
   }
   return *aASCIIString == '\0';
 }
 bool
 nsAString::LowerCaseEqualsLiteral(const char *aASCIIString) const
 {
   const char16_t *begin, *end;
   BeginReading(&begin, &end);
   for (; begin < end; ++begin, ++aASCIIString) {
     if (!*aASCIIString || !NS_IsAscii(*begin) ||
         NS_ToLower((char) *begin) != *aASCIIString) {
       return false;
     }
   }
   return *aASCIIString == '\0';
 }
 int32_t
 nsAString::Find(const self_type& aStr, uint32_t aOffset,
                 ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   if (aOffset > selflen)
     return -1;
   const char_type *other;
   uint32_t otherlen = aStr.BeginReading(&other);
   if (otherlen > selflen - aOffset)
     return -1;
   // We want to stop searching otherlen characters before the end of the string
   end -= otherlen;
   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {
     if (!c(cur, other, otherlen))
       return cur - begin;
   }
   return -1;
 }
 static bool ns_strnmatch(const char16_t *aStr, const char* aSubstring,
                            uint32_t aLen)
 {
   for (; aLen; ++aStr, ++aSubstring, --aLen) {
     if (!NS_IsAscii(*aStr))
       return false;
     if ((char) *aStr != *aSubstring)
       return false;
   }
   return true;
 }
 static bool ns_strnimatch(const char16_t *aStr, const char* aSubstring,
                             uint32_t aLen)
 {
   for (; aLen; ++aStr, ++aSubstring, --aLen) {
     if (!NS_IsAscii(*aStr))
       return false;
     if (NS_ToLower((char) *aStr) != NS_ToLower(*aSubstring))
       return false;
   }
   return true;
 }
 int32_t
 nsAString::Find(const char *aStr, uint32_t aOffset, bool aIgnoreCase) const
 {
   bool (*match)(const char16_t*, const char*, uint32_t) =
     aIgnoreCase ? ns_strnimatch : ns_strnmatch;
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   if (aOffset > selflen)
     return -1;
   uint32_t otherlen = strlen(aStr);
   if (otherlen > selflen - aOffset)
     return -1;
   // We want to stop searching otherlen characters before the end of the string
   end -= otherlen;
   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {
     if (match(cur, aStr, otherlen)) {
       return cur - begin;
     }
   }
   return -1;
 }
 int32_t
 nsAString::RFind(const self_type& aStr, int32_t aOffset, ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   const char_type *other;
   uint32_t otherlen = aStr.BeginReading(&other);
   if (selflen < otherlen)
     return -1;
   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))
     end -= otherlen;
   else
     end = begin + aOffset;
   for (const char_type *cur = end; cur >= begin; --cur) {
     if (!c(cur, other, otherlen))
       return cur - begin;
   }
   return -1;
 }
 int32_t
 nsAString::RFind(const char *aStr, int32_t aOffset, bool aIgnoreCase) const
 {
   bool (*match)(const char16_t*, const char*, uint32_t) =
     aIgnoreCase ? ns_strnimatch : ns_strnmatch;
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   uint32_t otherlen = strlen(aStr);
   if (selflen < otherlen)
     return -1;
   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))
     end -= otherlen;
   else
     end = begin + aOffset;
   for (const char_type *cur = end; cur >= begin; --cur) {
     if (match(cur, aStr, otherlen)) {
       return cur - begin;
     }
   }
   return -1;
 }
 int32_t
 nsAString::FindChar(char_type aChar, uint32_t aOffset) const
 {
   const char_type *start, *end;
   uint32_t len = BeginReading(&start, &end);
   if (aOffset > len)
     return -1;
   const char_type *cur;
   for (cur = start + aOffset; cur < end; ++cur) {
     if (*cur == aChar)
       return cur - start;
   }
   return -1;
 }
 int32_t
 nsAString::RFindChar(char_type aChar) const
 {
   const char16_t *start, *end;
   BeginReading(&start, &end);
   do {
     --end;
     if (*end == aChar)
       return end - start;
   } while (end >= start);
   return -1;
 }
 void
 nsAString::AppendInt(int aInt, int32_t aRadix)
 {
   const char *fmt;
   switch (aRadix) {
   case 8:
     fmt = "%o";
     break;
   case 10:
     fmt = "%d";
     break;
   case 16:
     fmt = "%x";
     break;
   default:
     NS_ERROR("Unrecognized radix");
     fmt = "";
   };
   char buf[20];
   int len = snprintf(buf, sizeof(buf), fmt, aInt);
   buf[sizeof(buf) - 1] = '\0';
   Append(NS_ConvertASCIItoUTF16(buf, len));
 }
 // Strings
 #ifndef XPCOM_GLUE_AVOID_NSPR
 int32_t
 nsAString::ToInteger(nsresult *aErrorCode, uint32_t aRadix) const
 {
   NS_ConvertUTF16toUTF8 narrow(*this);
   const char *fmt;
   switch (aRadix) {
   case 10:
     fmt = "%i";
     break;
   case 16:
     fmt = "%x";
     break;
   default:
     NS_ERROR("Unrecognized radix!");
     *aErrorCode = NS_ERROR_INVALID_ARG;
     return 0;
   }
   int32_t result = 0;
   if (PR_sscanf(narrow.get(), fmt, &result) == 1)
     *aErrorCode = NS_OK;
   else
     *aErrorCode = NS_ERROR_FAILURE;
   return result;
 }
 int64_t
 nsAString::ToInteger64(nsresult *aErrorCode, uint32_t aRadix) const
 {
   NS_ConvertUTF16toUTF8 narrow(*this);
   const char *fmt;
   switch (aRadix) {
   case 10:
     fmt = "%lli";
     break;
   case 16:
     fmt = "%llx";
     break;
   default:
     NS_ERROR("Unrecognized radix!");
     *aErrorCode = NS_ERROR_INVALID_ARG;
     return 0;
   }
   int64_t result = 0;
   if (PR_sscanf(narrow.get(), fmt, &result) == 1)
     *aErrorCode = NS_OK;
   else
     *aErrorCode = NS_ERROR_FAILURE;
   return result;
 }
 #endif // XPCOM_GLUE_AVOID_NSPR
 // nsACString
 uint32_t
 nsACString::BeginReading(const char_type **begin, const char_type **end) const
 {
   uint32_t len = NS_CStringGetData(*this, begin);
   if (end)
     *end = *begin + len;
   return len;
 }
 const nsACString::char_type*
 nsACString::BeginReading() const
 {
   const char_type *data;
   NS_CStringGetData(*this, &data);
   return data;
 }
 const nsACString::char_type*
 nsACString::EndReading() const
 {
   const char_type *data;
   uint32_t len = NS_CStringGetData(*this, &data);
   return data + len;
 }
 uint32_t
 nsACString::BeginWriting(char_type **begin, char_type **end, uint32_t newSize)
 {
   uint32_t len = NS_CStringGetMutableData(*this, newSize, begin);
   if (end)
     *end = *begin + len;
   return len;
 }
 nsACString::char_type*
 nsACString::BeginWriting(uint32_t aLen)
 {
   char_type *data;
   NS_CStringGetMutableData(*this, aLen, &data);
   return data;
 }
 nsACString::char_type*
 nsACString::EndWriting()
 {
   char_type *data;
   uint32_t len = NS_CStringGetMutableData(*this, UINT32_MAX, &data);
   return data + len;
 }
 bool
 nsACString::SetLength(uint32_t aLen)
 {
   char_type *data;
   NS_CStringGetMutableData(*this, aLen, &data);
   return data != nullptr;
 }
 void
 nsACString::StripChars(const char *aSet)
 {
   nsCString copy(*this);
   const char_type *source, *sourceEnd;
   copy.BeginReading(&source, &sourceEnd);
   char_type *dest;
   BeginWriting(&dest);
   if (!dest)
     return;
   char_type *curDest = dest;
   for (; source < sourceEnd; ++source) {
     const char *test;
     for (test = aSet; *test; ++test) {
       if (*source == char_type(*test))
         break;
     }
     if (!*test) {
       // not stripped, copy this char
       *curDest = *source;
       ++curDest;
     }
   }
   SetLength(curDest - dest);
 }
 void
 nsACString::Trim(const char *aSet, bool aLeading, bool aTrailing)
 {
   NS_ASSERTION(aLeading || aTrailing, "Ineffective Trim");
   const char *start, *end;
   uint32_t cutLen;
   if (aLeading) {
     BeginReading(&start, &end);
     for (cutLen = 0; start < end; ++start, ++cutLen) {
       const char *test;
       for (test = aSet; *test; ++test) {
         if (*test == *start)
           break;
       }
       if (!*test)
         break;
     }
     if (cutLen) {
       NS_CStringCutData(*this, 0, cutLen);
     }
   }
   if (aTrailing) {
     uint32_t len = BeginReading(&start, &end);
     --end;
     for (cutLen = 0; end >= start; --end, ++cutLen) {
       const char *test;
       for (test = aSet; *test; ++test) {
         if (*test == *end)
           break;
       }
       if (!*test)
         break;
     }
     if (cutLen) {
       NS_CStringCutData(*this, len - cutLen, cutLen);
     }
   }
 }
 int32_t
 nsACString::DefaultComparator(const char_type *a, const char_type *b,
                               uint32_t len)
 {
   return memcmp(a, b, len);
 }
 int32_t
 nsACString::Compare(const char_type *other, ComparatorFunc c) const
 {
   const char_type *cself;
   uint32_t selflen = NS_CStringGetData(*this, &cself);
   uint32_t otherlen = strlen(other);
   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;
   int32_t result = c(cself, other, comparelen);
   if (result == 0) {
     if (selflen < otherlen)
       return -1;
     else if (selflen > otherlen)
       return 1;
   }
   return result;
 }
 int32_t
 nsACString::Compare(const self_type &other, ComparatorFunc c) const
 {
   const char_type *cself, *cother;
   uint32_t selflen = NS_CStringGetData(*this, &cself);
   uint32_t otherlen = NS_CStringGetData(other, &cother);
   uint32_t comparelen = selflen <= otherlen ? selflen : otherlen;
   int32_t result = c(cself, cother, comparelen);
   if (result == 0) {
     if (selflen < otherlen)
       return -1;
     else if (selflen > otherlen)
       return 1;
   }
   return result;
 }
 bool
 nsACString::Equals(const char_type *other, ComparatorFunc c) const
 {
   const char_type *cself;
   uint32_t selflen = NS_CStringGetData(*this, &cself);
   uint32_t otherlen = strlen(other);
   if (selflen != otherlen)
     return false;
   return c(cself, other, selflen) == 0;
 }
 bool
 nsACString::Equals(const self_type &other, ComparatorFunc c) const
 {
   const char_type *cself;
   const char_type *cother;
   uint32_t selflen = NS_CStringGetData(*this, &cself);
   uint32_t otherlen = NS_CStringGetData(other, &cother);
   if (selflen != otherlen)
     return false;
   return c(cself, cother, selflen) == 0;
 }
 int32_t
 nsACString::Find(const self_type& aStr, uint32_t aOffset,
                  ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   if (aOffset > selflen)
     return -1;
   const char_type *other;
   uint32_t otherlen = aStr.BeginReading(&other);
   if (otherlen > selflen - aOffset)
     return -1;
   // We want to stop searching otherlen characters before the end of the string
   end -= otherlen;
   for (const char_type *cur = begin + aOffset; cur <= end; ++cur) {
     if (!c(cur, other, otherlen))
       return cur - begin;
   }
   return -1;
 }
 int32_t
 nsACString::Find(const char_type *aStr, ComparatorFunc c) const
 {
   return Find(aStr, strlen(aStr), c);
 }
 int32_t
 nsACString::Find(const char_type *aStr, uint32_t aLen, ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   if (aLen == 0) {
     NS_WARNING("Searching for zero-length string.");
     return -1;
   }
    if (aLen > selflen)
     return -1;
   // We want to stop searching otherlen characters before the end of the string
   end -= aLen;
   for (const char_type *cur = begin; cur <= end; ++cur) {
     if (!c(cur, aStr, aLen))
       return cur - begin;
   }
   return -1;
 }
 int32_t
 nsACString::RFind(const self_type& aStr, int32_t aOffset, ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   const char_type *other;
   uint32_t otherlen = aStr.BeginReading(&other);
   if (selflen < otherlen)
     return -1;
   if (aOffset < 0 || uint32_t(aOffset) > (selflen - otherlen))
     end -= otherlen;
   else
     end = begin + aOffset;
   for (const char_type *cur = end; cur >= begin; --cur) {
     if (!c(cur, other, otherlen))
       return cur - begin;
   }
   return -1;
 }
 int32_t
 nsACString::RFind(const char_type *aStr, ComparatorFunc c) const
 {
   return RFind(aStr, strlen(aStr), c);
 }
 int32_t
 nsACString::RFind(const char_type *aStr, int32_t aLen, ComparatorFunc c) const
 {
   const char_type *begin, *end;
   uint32_t selflen = BeginReading(&begin, &end);
   if (aLen <= 0) {
     NS_WARNING("Searching for zero-length string.");
     return -1;
   }
   if (uint32_t(aLen) > selflen)
     return -1;
   // We want to start searching otherlen characters before the end of the string
   end -= aLen;
   for (const char_type *cur = end; cur >= begin; --cur) {
     if (!c(cur, aStr, aLen))
       return cur - begin;
   }
   return -1;
 }
 int32_t
 nsACString::FindChar(char_type aChar, uint32_t aOffset) const
 {
   const char_type *start, *end;
   uint32_t len = BeginReading(&start, &end);
   if (aOffset > len)
     return -1;
   const char_type *cur;
   for (cur = start + aOffset; cur < end; ++cur) {
     if (*cur == aChar)
       return cur - start;
   }
   return -1;
 }
 int32_t
 nsACString::RFindChar(char_type aChar) const
 {
   const char *start, *end;
   BeginReading(&start, &end);
   for (; end >= start; --end) {
     if (*end == aChar)
       return end - start;
   }
   return -1;
 }
 void
 nsACString::AppendInt(int aInt, int32_t aRadix)
 {
   const char *fmt;
   switch (aRadix) {
   case 8:
     fmt = "%o";
     break;
   case 10:
     fmt = "%d";
     break;
   case 16:
     fmt = "%x";
     break;
   default:
     NS_ERROR("Unrecognized radix");
     fmt = "";
   };
   char buf[20];
   int len = snprintf(buf, sizeof(buf), fmt, aInt);
   buf[sizeof(buf) - 1] = '\0';
   Append(buf, len);
 }
 #ifndef XPCOM_GLUE_AVOID_NSPR
 int32_t
 nsACString::ToInteger(nsresult *aErrorCode, uint32_t aRadix) const
 {
   const char *fmt;
   switch (aRadix) {
   case 10:
     fmt = "%i";
     break;
   case 16:
     fmt = "%x";
     break;
   default:
     NS_ERROR("Unrecognized radix!");
     *aErrorCode = NS_ERROR_INVALID_ARG;
     return 0;
   }
   int32_t result = 0;
   if (PR_sscanf(nsCString(*this).get(), fmt, &result) == 1)
     *aErrorCode = NS_OK;
   else
     *aErrorCode = NS_ERROR_FAILURE;
   return result;
 }
 int64_t
 nsACString::ToInteger64(nsresult *aErrorCode, uint32_t aRadix) const
 {
   const char *fmt;
   switch (aRadix) {
   case 10:
     fmt = "%lli";
     break;
   case 16:
     fmt = "%llx";
     break;
   default:
     NS_ERROR("Unrecognized radix!");
     *aErrorCode = NS_ERROR_INVALID_ARG;
     return 0;
   }
   int64_t result = 0;
   if (PR_sscanf(nsCString(*this).get(), fmt, &result) == 1)
     *aErrorCode = NS_OK;
   else
     *aErrorCode = NS_ERROR_FAILURE;
   return result;
 }
 #endif // XPCOM_GLUE_AVOID_NSPR
 // Substrings
 nsDependentSubstring::nsDependentSubstring(const abstract_string_type& aStr,
                                            uint32_t aStartPos)
 {
   const char16_t* data;
   uint32_t len = NS_StringGetData(aStr, &data);
   if (aStartPos > len)
     aStartPos = len;
   NS_StringContainerInit2(*this, data + aStartPos, len - aStartPos,
                           NS_STRING_CONTAINER_INIT_DEPEND |
                           NS_STRING_CONTAINER_INIT_SUBSTRING);
 }
 nsDependentSubstring::nsDependentSubstring(const abstract_string_type& aStr,
                                            uint32_t aStartPos,
                                            uint32_t aLength)
 {
   const char16_t* data;
   uint32_t len = NS_StringGetData(aStr, &data);
   if (aStartPos > len)
     aStartPos = len;
   if (aStartPos + aLength > len)
     aLength = len - aStartPos;
   NS_StringContainerInit2(*this, data + aStartPos, aLength,
                           NS_STRING_CONTAINER_INIT_DEPEND |
                             NS_STRING_CONTAINER_INIT_SUBSTRING);
 }
 nsDependentCSubstring::nsDependentCSubstring(const abstract_string_type& aStr,
                                              uint32_t aStartPos)
 {
   const char* data;
   uint32_t len = NS_CStringGetData(aStr, &data);
   if (aStartPos > len)
     aStartPos = len;
   NS_CStringContainerInit2(*this, data + aStartPos, len - aStartPos,
                            NS_CSTRING_CONTAINER_INIT_DEPEND |
                            NS_CSTRING_CONTAINER_INIT_SUBSTRING);
 }
 nsDependentCSubstring::nsDependentCSubstring(const abstract_string_type& aStr,
                                              uint32_t aStartPos,
                                              uint32_t aLength)
 {
   const char* data;
   uint32_t len = NS_CStringGetData(aStr, &data);
   if (aStartPos > len)
     aStartPos = len;
   if (aStartPos + aLength > len)
     aLength = len - aStartPos;
   NS_CStringContainerInit2(*this, data + aStartPos, aLength,
                            NS_CSTRING_CONTAINER_INIT_DEPEND |
                            NS_CSTRING_CONTAINER_INIT_SUBSTRING);
 }
 // Utils
 char*
 ToNewUTF8String(const nsAString& aSource)
 {
   nsCString temp;
   CopyUTF16toUTF8(aSource, temp);
   return NS_CStringCloneData(temp);
 }
 void
 CompressWhitespace(nsAString& aString)
 {
   char16_t *start;
   uint32_t len = NS_StringGetMutableData(aString, UINT32_MAX, &start);
   char16_t *end = start + len;
   char16_t *from = start, *to = start;
   // Skip any leading whitespace
   while (from < end && NS_IsAsciiWhitespace(*from))
     from++;
   while (from < end) {
     char16_t theChar = *from++;
     if (NS_IsAsciiWhitespace(theChar)) {
       // We found a whitespace char, so skip over any more
       while (from < end && NS_IsAsciiWhitespace(*from))
         from++;
       // Turn all whitespace into spaces
       theChar = ' ';
     }
     *to++ = theChar;
   }
   // Drop any trailing space
   if (to > start && to[-1] == ' ')
     to--;
   // Re-terminate the string
   *to = '\0';
   // Set the new length
   aString.SetLength(to - start);
 }
 uint32_t
 ToLowerCase(nsACString& aStr)
 {
   char *begin, *end;
   uint32_t len = aStr.BeginWriting(&begin, &end);
   for (; begin < end; ++begin) {
     *begin = NS_ToLower(*begin);
   }
   return len;
 }
 uint32_t
 ToUpperCase(nsACString& aStr)
 {
   char *begin, *end;
   uint32_t len = aStr.BeginWriting(&begin, &end);
   for (; begin < end; ++begin) {
     *begin = NS_ToUpper(*begin);
   }
   return len;
 }
 uint32_t
 ToLowerCase(const nsACString& aSrc, nsACString& aDest)
 {
   const char *begin,  *end;
   uint32_t len = aSrc.BeginReading(&begin, &end);
   char *dest;
   NS_CStringGetMutableData(aDest, len, &dest);
   for (; begin < end; ++begin, ++dest) {
     *dest = NS_ToLower(*begin);
   }
   return len;
 }
 uint32_t
 ToUpperCase(const nsACString& aSrc, nsACString& aDest)
 {
   const char *begin,  *end;
   uint32_t len = aSrc.BeginReading(&begin, &end);
   char *dest;
   NS_CStringGetMutableData(aDest, len, &dest);
   for (; begin < end; ++begin, ++dest) {
     *dest = NS_ToUpper(*begin);
   }
   return len;
 }
 int32_t
 CaseInsensitiveCompare(const char *a, const char *b,
                        uint32_t len)
 {
   for (const char *aend = a + len; a < aend; ++a, ++b) {
     char la = NS_ToLower(*a);
     char lb = NS_ToLower(*b);
     if (la == lb)
       continue;
     return la < lb ? -1 : 1;
   }
   return 0;
 }
 bool
 ParseString(const nsACString& aSource, char aDelimiter,
             nsTArray<nsCString>& aArray)
 {
   int32_t start = 0;
   int32_t end = aSource.Length();
   uint32_t oldLength = aArray.Length();
   for (;;) {
     int32_t delimiter = aSource.FindChar(aDelimiter, start);
     if (delimiter < 0) {
       delimiter = end;
     }
     if (delimiter != start) {
       if (!aArray.AppendElement(Substring(aSource, start, delimiter - start))) {
         aArray.RemoveElementsAt(oldLength, aArray.Length() - oldLength);
         return false;
       }
     }
     if (delimiter == end)
       break;
     start = ++delimiter;
     if (start == end)
       break;
   }
   return true;
 }

The Tor Browser / annotate

xpcom/glue/nsStringAPI.cpp@6474c204b198 (annotated)

xpcom/glue/nsStringAPI.cpp