Home | History | Annotate | Download | only in src 
      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