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
SimpleStringBuilder(int size)37 SimpleStringBuilder::SimpleStringBuilder(int size) {
38 buffer_ = Vector<char>::New(size);
39 position_ = 0;
40 }
41
42
AddString(const char * s)43 void SimpleStringBuilder::AddString(const char* s) {
44 AddSubstring(s, StrLength(s));
45 }
46
47
AddSubstring(const char * s,int n)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
AddPadding(char c,int count)56 void SimpleStringBuilder::AddPadding(char c, int count) {
57 for (int i = 0; i < count; i++) {
58 AddCharacter(c);
59 }
60 }
61
62
AddDecimalInteger(int32_t value)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
Finalize()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