1 // Copyright 2011 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 #include <stdarg.h> 29 #include "../include/v8stdint.h" 30 #include "checks.h" 31 #include "utils.h" 32 33 namespace v8 { 34 namespace internal { 35 36 37 SimpleStringBuilder::SimpleStringBuilder(int size) { 38 buffer_ = Vector<char>::New(size); 39 position_ = 0; 40 } 41 42 43 void SimpleStringBuilder::AddString(const char* s) { 44 AddSubstring(s, StrLength(s)); 45 } 46 47 48 void SimpleStringBuilder::AddSubstring(const char* s, int n) { 49 ASSERT(!is_finalized() && position_ + n < buffer_.length()); 50 ASSERT(static_cast<size_t>(n) <= strlen(s)); 51 memcpy(&buffer_[position_], s, n * kCharSize); 52 position_ += n; 53 } 54 55 56 void SimpleStringBuilder::AddPadding(char c, int count) { 57 for (int i = 0; i < count; i++) { 58 AddCharacter(c); 59 } 60 } 61 62 63 void SimpleStringBuilder::AddDecimalInteger(int32_t value) { 64 uint32_t number = static_cast<uint32_t>(value); 65 if (value < 0) { 66 AddCharacter('-'); 67 number = static_cast<uint32_t>(-value); 68 } 69 int digits = 1; 70 for (uint32_t factor = 10; digits < 10; digits++, factor *= 10) { 71 if (factor > number) break; 72 } 73 position_ += digits; 74 for (int i = 1; i <= digits; i++) { 75 buffer_[position_ - i] = '0' + static_cast<char>(number % 10); 76 number /= 10; 77 } 78 } 79 80 81 char* SimpleStringBuilder::Finalize() { 82 ASSERT(!is_finalized() && position_ < buffer_.length()); 83 buffer_[position_] = '\0'; 84 // Make sure nobody managed to add a 0-character to the 85 // buffer while building the string. 86 ASSERT(strlen(buffer_.start()) == static_cast<size_t>(position_)); 87 position_ = -1; 88 ASSERT(is_finalized()); 89 return buffer_.start(); 90 } 91 92 } } // namespace v8::internal 93