DevTools: update V8Inspector to work with the new v8_inspector API.

third_party/WebKit/Source/platform/inspector_protocol/String16STL.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/inspector_protocol/String16STL.h"
 
+#include "platform/inspector_protocol/Platform.h"
+
 #include <algorithm>
 #include <cctype>
+#include <cstdio>
 #include <functional>
 #include <locale>
 
 namespace blink {
 namespace protocol {
 
 const UChar replacementCharacter = 0xFFFD;
 
 template<typename CharType> inline bool isASCII(CharType c)
 {
@@ skipping 248 matching lines @@
         case 1:
             *--target =  (char)(ch | firstByteMark[bytesToWrite]);
         }
         target += bytesToWrite;
     }
     *sourceStart = source;
     *targetStart = target;
     return result;
 }
 
+/**
+ * Is this code point a BMP code point (U+0000..U+ffff)?
+ * @param c 32-bit code point
+ * @return TRUE or FALSE
+ * @stable ICU 2.8
+ */
+#define U_IS_BMP(c) ((uint32_t)(c) <= 0xffff)
+
+/**
+ * Is this code point a supplementary code point (U+10000..U+10ffff)?
+ * @param c 32-bit code point
+ * @return TRUE or FALSE
+ * @stable ICU 2.8
+ */
+#define U_IS_SUPPLEMENTARY(c) ((uint32_t)((c) - 0x10000) <= 0xfffff)
+
+/**
+ * Is this code point a surrogate (U+d800..U+dfff)?
+ * @param c 32-bit code point
+ * @return TRUE or FALSE
+ * @stable ICU 2.4
+ */
+#define U_IS_SURROGATE(c) (((c) & 0xfffff800) == 0xd800)
+
+/**
+ * Get the lead surrogate (0xd800..0xdbff) for a
+ * supplementary code point (0x10000..0x10ffff).
+ * @param supplementary 32-bit code point (U+10000..U+10ffff)
+ * @return lead surrogate (U+d800..U+dbff) for supplementary
+ * @stable ICU 2.4
+ */
+#define U16_LEAD(supplementary) (UChar)(((supplementary) >> 10) + 0xd7c0)
+
+/**
+ * Get the trail surrogate (0xdc00..0xdfff) for a
+ * supplementary code point (0x10000..0x10ffff).
+ * @param supplementary 32-bit code point (U+10000..U+10ffff)
+ * @return trail surrogate (U+dc00..U+dfff) for supplementary
+ * @stable ICU 2.4
+ */
+#define U16_TRAIL(supplementary) (UChar)(((supplementary) & 0x3ff) | 0xdc00)
+
+// This must be called with the length pre-determined by the first byte.
+// If presented with a length > 4, this returns false.  The Unicode
+// definition of UTF-8 goes up to 4-byte sequences.
+static bool isLegalUTF8(const unsigned char* source, int length)
+{
+    unsigned char a;
+    const unsigned char* srcptr = source + length;
+    switch (length) {
+    default:
+        return false;
+    // Everything else falls through when "true"...
+    case 4:
+        if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
+            return false;
+    case 3:
+        if ((a = (*--srcptr)) < 0x80 || a > 0xBF)
+            return false;
+    case 2:
+        if ((a = (*--srcptr)) > 0xBF)
+            return false;
+
+        // no fall-through in this inner switch
+        switch (*source) {
+        case 0xE0:
+            if (a < 0xA0)
+                return false;
+            break;
+        case 0xED:
+            if (a > 0x9F)
+                return false;
+            break;
+        case 0xF0:
+            if (a < 0x90)
+                return false;
+            break;
+        case 0xF4:
+            if (a > 0x8F)
+                return false;
+            break;
+        default:
+            if (a < 0x80)
+                return false;
+        }
+
+    case 1:
+        if (*source >= 0x80 && *source < 0xC2)
+            return false;
+    }
+    if (*source > 0xF4)
+        return false;
+    return true;
+}
+
+// Magic values subtracted from a buffer value during UTF8 conversion.
+// This table contains as many values as there might be trailing bytes
+// in a UTF-8 sequence.
+static const UChar32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, 0x03C82080UL, static_cast<UChar32>(0xFA082080UL), static_cast<UChar32>(0x82082080UL) };
+
+static inline UChar32 readUTF8Sequence(const char*& sequence, unsigned length)
+{
+    UChar32 character = 0;
+
+    // The cases all fall through.
+    switch (length) {
+    case 6:
+        character += static_cast<unsigned char>(*sequence++);
+        character <<= 6;
+    case 5:
+        character += static_cast<unsigned char>(*sequence++);
+        character <<= 6;
+    case 4:
+        character += static_cast<unsigned char>(*sequence++);
+        character <<= 6;
+    case 3:
+        character += static_cast<unsigned char>(*sequence++);
+        character <<= 6;
+    case 2:
+        character += static_cast<unsigned char>(*sequence++);
+        character <<= 6;
+    case 1:
+        character += static_cast<unsigned char>(*sequence++);
+    }
+
+    return character - offsetsFromUTF8[length - 1];
+}
+
+ConversionResult convertUTF8ToUTF16(
+    const char** sourceStart, const char* sourceEnd,
+    UChar** targetStart, UChar* targetEnd, bool* sourceAllASCII, bool strict)
+{
+    ConversionResult result = conversionOK;
+    const char* source = *sourceStart;
+    UChar* target = *targetStart;
+    UChar orAllData = 0;
+    while (source < sourceEnd) {
+        int utf8SequenceLength = inlineUTF8SequenceLength(*source);
+        if (sourceEnd - source < utf8SequenceLength)  {
+            result = sourceExhausted;
+            break;
+        }
+        // Do this check whether lenient or strict
+        if (!isLegalUTF8(reinterpret_cast<const unsigned char*>(source), utf8SequenceLength)) {
+            result = sourceIllegal;
+            break;
+        }
+
+        UChar32 character = readUTF8Sequence(source, utf8SequenceLength);
+
+        if (target >= targetEnd) {
+            source -= utf8SequenceLength; // Back up source pointer!
+            result = targetExhausted;
+            break;
+        }
+
+        if (U_IS_BMP(character)) {
+            // UTF-16 surrogate values are illegal in UTF-32
+            if (U_IS_SURROGATE(character)) {
+                if (strict) {
+                    source -= utf8SequenceLength; // return to the illegal value itself
+                    result = sourceIllegal;
+                    break;
+                }
+                *target++ = replacementCharacter;
+                orAllData |= replacementCharacter;
+            } else {
+                *target++ = static_cast<UChar>(character); // normal case
+                orAllData |= character;
+            }
+        } else if (U_IS_SUPPLEMENTARY(character)) {
+            // target is a character in range 0xFFFF - 0x10FFFF
+            if (target + 1 >= targetEnd) {
+                source -= utf8SequenceLength; // Back up source pointer!
+                result = targetExhausted;
+                break;
+            }
+            *target++ = U16_LEAD(character);
+            *target++ = U16_TRAIL(character);
+            orAllData = 0xffff;
+        } else {
+            if (strict) {
+                source -= utf8SequenceLength; // return to the start
+                result = sourceIllegal;
+                break; // Bail out; shouldn't continue
+            } else {
+                *target++ = replacementCharacter;
+                orAllData |= replacementCharacter;
+            }
+        }
+    }
+    *sourceStart = source;
+    *targetStart = target;
+
+    if (sourceAllASCII)
+        *sourceAllASCII = !(orAllData & ~0x7f);
+
+    return result;
+}
+
 // Helper to write a three-byte UTF-8 code point to the buffer, caller must check room is available.
 static inline void putUTF8Triple(char*& buffer, UChar ch)
 {
     DCHECK_GE(ch, 0x0800);
     *buffer++ = static_cast<char>(((ch >> 12) & 0x0F) | 0xE0);
     *buffer++ = static_cast<char>(((ch >> 6) & 0x3F) | 0x80);
     *buffer++ = static_cast<char>((ch & 0x3F) | 0x80);
 }
 
+String16 String16::fromUTF8(const char* stringStart, size_t length)
+{
+    if (!stringStart || !length)
+        return String16();
+
+    std::vector<UChar> buffer(length);
+    UChar* bufferStart = buffer.data();
+
+    UChar* bufferCurrent = bufferStart;
+    const char* stringCurrent = stringStart;
+    if (convertUTF8ToUTF16(&stringCurrent, stringStart + length, &bufferCurrent, bufferCurrent + buffer.size(), 0, true) != conversionOK)
+        return String16();
+
+    unsigned utf16Length = bufferCurrent - bufferStart;
+    return String16(bufferStart, utf16Length);
+}
+
 // trim from start
 static inline wstring &ltrim(wstring &s)
 {
     s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::ptr_fun<int, int>(std::isspace))));
         return s;
 }
 
 // trim from end
 static inline wstring &rtrim(wstring &s)
 {
     s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::ptr_fun<int, int>(std::isspace))).base(), s.end());
         return s;
 }
 
 // trim from both ends
 static inline wstring &trim(wstring &s)
 {
     return ltrim(rtrim(s));
 }
 
+// static
+std::string String16::intToString(int i)
+{
+    char buffer[50];
+    std::sprintf(buffer, "%d", i);
+    return std::string(buffer);
+}
+
+// static
+std::string String16::doubleToString(double d)
+{
+    char buffer[100];
+    std::sprintf(buffer, "%f", d);
+    return std::string(buffer);
+}
+
 std::string String16::utf8() const
 {
     unsigned length = this->length();
 
     if (!length)
         return std::string("");
 
     // Allocate a buffer big enough to hold all the characters
     // (an individual UTF-16 UChar can only expand to 3 UTF-8 bytes).
     // Optimization ideas, if we find this function is hot:
@@ skipping 41 matching lines @@
 
 String16 String16::stripWhiteSpace() const
 {
     wstring result(m_impl);
     trim(result);
     return result;
 }
 
 } // namespace protocol
 } // namespace blink