15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright (c) 2011 The Chromium Authors. All rights reserved. 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Use of this source code is governed by a BSD-style license that can be 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * found in the LICENSE file. 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdarg.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 99ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "ppapi/native_client/src/untrusted/nacl_ppapi_util/string_buffer.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace nacl { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)StringBuffer::StringBuffer() { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nbytes_ = 1024; 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_ = 0; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_ = reinterpret_cast<char *>(malloc(nbytes_)); 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NULL == buffer_) { 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) perror("StringBuffer Ctor malloc"); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) abort(); 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_[0] = '\0'; 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void StringBuffer::DiscardOutput() { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_ = 0; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_[0] = '\0'; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)StringBuffer::~StringBuffer() { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nbytes_ = 0; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_ = 0; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) free(buffer_); 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_ = NULL; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void StringBuffer::Printf(char const *fmt, ...) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t space; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char *insert_pt; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_list ap; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t written = 0; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) char *new_buffer; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (;;) { 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) space = nbytes_ - insert_; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_pt = buffer_ + insert_; 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_start(ap, fmt); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) written = vsnprintf(insert_pt, space, fmt, ap); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) va_end(ap); 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (written < space) { 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) insert_ += written; 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // insufficient space -- grow the buffer 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) new_buffer = reinterpret_cast<char *>(realloc(buffer_, 2 * nbytes_)); 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (NULL == new_buffer) { 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // give up 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) fprintf(stderr, "StringBufferPrintf: no memory\n"); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) nbytes_ *= 2; 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buffer_ = new_buffer; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace nacl 66