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
33namespace v8 {
34namespace internal {
35
36
37SimpleStringBuilder::SimpleStringBuilder(int size) {
38  buffer_ = Vector<char>::New(size);
39  position_ = 0;
40}
41
42
43void SimpleStringBuilder::AddString(const char* s) {
44  AddSubstring(s, StrLength(s));
45}
46
47
48void 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
56void SimpleStringBuilder::AddPadding(char c, int count) {
57  for (int i = 0; i < count; i++) {
58    AddCharacter(c);
59  }
60}
61
62
63void 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
81char* 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