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annotate libs/assimp/DefaultIOStream.cpp @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /*
nuclear@0 2 ---------------------------------------------------------------------------
nuclear@0 3 Open Asset Import Library (assimp)
nuclear@0 4 ---------------------------------------------------------------------------
nuclear@0 5
nuclear@0 6 Copyright (c) 2006-2012, assimp team
nuclear@0 7
nuclear@0 8 All rights reserved.
nuclear@0 9
nuclear@0 10 Redistribution and use of this software in source and binary forms,
nuclear@0 11 with or without modification, are permitted provided that the following
nuclear@0 12 conditions are met:
nuclear@0 13
nuclear@0 14 * Redistributions of source code must retain the above
nuclear@0 15 copyright notice, this list of conditions and the
nuclear@0 16 following disclaimer.
nuclear@0 17
nuclear@0 18 * Redistributions in binary form must reproduce the above
nuclear@0 19 copyright notice, this list of conditions and the
nuclear@0 20 following disclaimer in the documentation and/or other
nuclear@0 21 materials provided with the distribution.
nuclear@0 22
nuclear@0 23 * Neither the name of the assimp team, nor the names of its
nuclear@0 24 contributors may be used to endorse or promote products
nuclear@0 25 derived from this software without specific prior
nuclear@0 26 written permission of the assimp team.
nuclear@0 27
nuclear@0 28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 29 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 30 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 31 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 32 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 33 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 34 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 35 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 36 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 37 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 38 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 39 ---------------------------------------------------------------------------
nuclear@0 40 */
nuclear@0 41 /** @file DefaultIOStream.cpp
nuclear@0 42 * @brief Default File I/O implementation for #Importer
nuclear@0 43 */
nuclear@0 44
nuclear@0 45 #include "AssimpPCH.h"
nuclear@0 46
nuclear@0 47 #include "DefaultIOStream.h"
nuclear@0 48 #include <sys/types.h>
nuclear@0 49 #include <sys/stat.h>
nuclear@0 50
nuclear@0 51 using namespace Assimp;
nuclear@0 52
nuclear@0 53 // ----------------------------------------------------------------------------------
nuclear@0 54 DefaultIOStream::~DefaultIOStream()
nuclear@0 55 {
nuclear@0 56 if (mFile) {
nuclear@0 57 ::fclose(mFile);
nuclear@0 58 }
nuclear@0 59 }
nuclear@0 60
nuclear@0 61 // ----------------------------------------------------------------------------------
nuclear@0 62 size_t DefaultIOStream::Read(void* pvBuffer,
nuclear@0 63 size_t pSize,
nuclear@0 64 size_t pCount)
nuclear@0 65 {
nuclear@0 66 ai_assert(NULL != pvBuffer && 0 != pSize && 0 != pCount);
nuclear@0 67 return (mFile ? ::fread(pvBuffer, pSize, pCount, mFile) : 0);
nuclear@0 68 }
nuclear@0 69
nuclear@0 70 // ----------------------------------------------------------------------------------
nuclear@0 71 size_t DefaultIOStream::Write(const void* pvBuffer,
nuclear@0 72 size_t pSize,
nuclear@0 73 size_t pCount)
nuclear@0 74 {
nuclear@0 75 ai_assert(NULL != pvBuffer && 0 != pSize && 0 != pCount);
nuclear@0 76 return (mFile ? ::fwrite(pvBuffer, pSize, pCount, mFile) : 0);
nuclear@0 77 }
nuclear@0 78
nuclear@0 79 // ----------------------------------------------------------------------------------
nuclear@0 80 aiReturn DefaultIOStream::Seek(size_t pOffset,
nuclear@0 81 aiOrigin pOrigin)
nuclear@0 82 {
nuclear@0 83 if (!mFile) {
nuclear@0 84 return AI_FAILURE;
nuclear@0 85 }
nuclear@0 86
nuclear@0 87 // Just to check whether our enum maps one to one with the CRT constants
nuclear@0 88 BOOST_STATIC_ASSERT(aiOrigin_CUR == SEEK_CUR &&
nuclear@0 89 aiOrigin_END == SEEK_END && aiOrigin_SET == SEEK_SET);
nuclear@0 90
nuclear@0 91 // do the seek
nuclear@0 92 return (0 == ::fseek(mFile, (long)pOffset,(int)pOrigin) ? AI_SUCCESS : AI_FAILURE);
nuclear@0 93 }
nuclear@0 94
nuclear@0 95 // ----------------------------------------------------------------------------------
nuclear@0 96 size_t DefaultIOStream::Tell() const
nuclear@0 97 {
nuclear@0 98 if (!mFile) {
nuclear@0 99 return 0;
nuclear@0 100 }
nuclear@0 101 return ::ftell(mFile);
nuclear@0 102 }
nuclear@0 103
nuclear@0 104 // ----------------------------------------------------------------------------------
nuclear@0 105 size_t DefaultIOStream::FileSize() const
nuclear@0 106 {
nuclear@0 107 if (! mFile || mFilename.empty()) {
nuclear@0 108 return 0;
nuclear@0 109 }
nuclear@0 110
nuclear@0 111 if (SIZE_MAX == cachedSize) {
nuclear@0 112
nuclear@0 113 // TODO: Is that really faster if we're already owning a handle to the file?
nuclear@0 114 #if defined _WIN32 && !defined __GNUC__
nuclear@0 115 struct __stat64 fileStat;
nuclear@0 116 int err = _stat64( mFilename.c_str(), &fileStat );
nuclear@0 117 if (0 != err)
nuclear@0 118 return 0;
nuclear@0 119 cachedSize = (size_t) (fileStat.st_size);
nuclear@0 120 #else
nuclear@0 121 struct stat fileStat;
nuclear@0 122 int err = stat(mFilename.c_str(), &fileStat );
nuclear@0 123 if (0 != err)
nuclear@0 124 return 0;
nuclear@0 125 cachedSize = (size_t) (fileStat.st_size);
nuclear@0 126 #endif
nuclear@0 127 }
nuclear@0 128 return cachedSize;
nuclear@0 129 }
nuclear@0 130
nuclear@0 131 // ----------------------------------------------------------------------------------
nuclear@0 132 void DefaultIOStream::Flush()
nuclear@0 133 {
nuclear@0 134 if (mFile) {
nuclear@0 135 ::fflush(mFile);
nuclear@0 136 }
nuclear@0 137 }
nuclear@0 138
nuclear@0 139 // ----------------------------------------------------------------------------------