2 * © 2008 by David Roden <droden@gmail.com>
7 #include "CollectionReader.h"
8 #include "GlobalSettings.h"
10 CollectionReader::CollectionReader(ReaderInput* readerInput) {
11 this->readerInput = readerInput;
15 CollectionReader::~CollectionReader() {
18 bool CollectionReader::isLineBreakPresent() {
19 size_t indexOfLineBreak = growingBuffer.indexOf('\n');
20 GlobalSettings::isVerbose() && (indexOfLineBreak != (size_t) -1) && fprintf(stderr, "[%s:%d] found line break at %d.\n", __FILE__, __LINE__, indexOfLineBreak);
21 GlobalSettings::isVerbose() && (indexOfLineBreak == (size_t) -1) && fprintf(stderr, "[%s:%d] could not find line break.\n", __FILE__, __LINE__);
22 return indexOfLineBreak != (size_t) -1;
25 StringTag* CollectionReader::readStringTag(bool header) {
28 if (!ensureBufferCapacity(2)) {
31 growingBuffer.read(&unknown, 2);
34 if (!ensureBufferCapacity(1)) {
37 growingBuffer.read(&tagName, 1);
38 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag name %d.\n", __FILE__, __LINE__, tagName);
39 uint16_t tagLength = 0;
40 if (!ensureBufferCapacity(2)) {
43 growingBuffer.read(&tagLength, 2);
44 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag length %d.\n", __FILE__, __LINE__, tagLength);
45 char* tagValue = (char*) malloc(tagLength + 1);
46 if (!ensureBufferCapacity(tagLength)) {
49 growingBuffer.read(tagValue, tagLength);
50 tagValue[tagLength] = '\0';
51 StringTag* stringTag = new StringTag(tagName, tagValue);
56 BlobTag* CollectionReader::readBlobTag(bool header) {
59 if (!ensureBufferCapacity(2)) {
62 growingBuffer.read(&unknown, 2);
65 if (!ensureBufferCapacity(1)) {
68 growingBuffer.read(&tagName, 1);
69 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag name %d.\n", __FILE__, __LINE__, tagName);
70 uint32_t tagLength = 0;
71 if (!ensureBufferCapacity(4)) {
74 growingBuffer.read(&tagLength, 4);
75 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag length %d.\n", __FILE__, __LINE__, tagLength);
76 void* tagValue = (char*) malloc(tagLength);
77 if (!ensureBufferCapacity(tagLength)) {
80 growingBuffer.read(tagValue, tagLength);
81 BlobTag* blobTag = new BlobTag(tagName, tagValue, tagLength);
86 ED2KLink* CollectionReader::getNextLink() {
87 if (readerInput->isEOF() && !growingBuffer.getRemaining()) {
88 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] readInput EOF reached.\n", __FILE__, __LINE__);
92 identifyCollectionType();
93 if (readerInput->isEOF() && !growingBuffer.getRemaining()) {
94 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] readInput EOF reached.\n", __FILE__, __LINE__);
98 if (isTextCollection) {
99 while (!readerInput->isEOF() && !isLineBreakPresent()) {
102 if (readerInput->isEOF() && !growingBuffer.getRemaining()) {
103 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] readInput EOF reached.\n", __FILE__, __LINE__);
106 size_t indexOfLineBreak = growingBuffer.indexOf('\n');
108 if (indexOfLineBreak == (size_t) -1) {
109 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] could not find line break, using remainder of file.\n", __FILE__, __LINE__);
110 indexOfLineBreak = growingBuffer.getRemaining();
111 line = (char*) malloc(indexOfLineBreak + 1);
112 growingBuffer.read(line, indexOfLineBreak);
113 line[indexOfLineBreak] = '\0';
115 line = (char*) malloc(indexOfLineBreak + 1);
116 growingBuffer.read(line, indexOfLineBreak + 1);
117 if (line[indexOfLineBreak] == '\n') {
118 line[indexOfLineBreak] = '\0';
120 if (line[indexOfLineBreak - 1] == '\r') {
121 line[indexOfLineBreak - 1] = '\0';
125 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] got line: %s\n", __FILE__, __LINE__, line);
126 ED2KLink* ed2kLink = ED2KLink::parseED2KLink(line);
132 if (!ensureBufferCapacity(4)) {
135 uint32_t headerTagCount = 0;
136 growingBuffer.read(&headerTagCount, 4);
137 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] will read %d header tags.\n", __FILE__, __LINE__, headerTagCount);
138 for (uint32_t headerTagIndex = 0; headerTagIndex < headerTagCount; headerTagIndex++) {
140 if (!ensureBufferCapacity(1)) {
143 growingBuffer.read(&tagType, 1);
144 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag type %d.\n", __FILE__, __LINE__, tagType);
145 if (tagType == 0x02) {
146 StringTag* stringTag = readStringTag(true);
147 if (stringTag->getId() == 0x01) {
148 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] FT_FILENAME: “%s”\n", __FILE__, __LINE__, (char*) stringTag->getValue());
149 } else if (stringTag->getId() == 0x31) {
150 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] FT_COLLECTIONAUTHOR: “%s”\n", __FILE__, __LINE__, (char*) stringTag->getValue());
152 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] unknown string in header: “%s”\n", __FILE__, __LINE__, (char*) stringTag->getValue());
154 } else if (tagType == 0x07) {
155 BlobTag* blobTag = readBlobTag(true);
156 if (blobTag->getId() == 0x32) {
157 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] FT_COLLECTIONAUTHORKEY: %d bytes.\n", __FILE__, __LINE__, blobTag->getSize());
159 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] unknown block in header: %d bytes.\n", __FILE__, __LINE__, blobTag->getSize());
162 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] unknown tag type: %02x.\n", __FILE__, __LINE__, tagType);
165 fileCollectionCount = 0;
166 if (!ensureBufferCapacity(4)) {
169 growingBuffer.read(&fileCollectionCount, 4);
170 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] will read %d file tags.\n", __FILE__, __LINE__, fileCollectionCount);
171 collectionFileIndex = 0;
174 if (collectionFileIndex < fileCollectionCount) {
176 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] reached end of collection.\n", __FILE__, __LINE__);
181 bool CollectionReader::ensureBufferCapacity(size_t byteCount) {
182 while (!readerInput->isEOF() && (growingBuffer.getRemaining() < byteCount)) {
183 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] only %d bytes remaning, need at least %d, reading more bytes.\n", __FILE__, __LINE__, growingBuffer.getRemaining(), byteCount);
186 if (readerInput->isEOF() && (growingBuffer.getRemaining() < byteCount)) {
187 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] need %d more bytes, but file is EOF.\n", __FILE__, __LINE__, (byteCount - growingBuffer.getRemaining()));
193 void CollectionReader::readMoreBytes() {
197 readBytes = readerInput->read(buffer, 1024);
198 growingBuffer.write(buffer, readBytes);
201 void CollectionReader::identifyCollectionType() {
204 readBytes = readerInput->read(&version, 4);
205 if ((readBytes < 4) || readerInput->isEOF()) {
208 if (version == 0x01) {
209 isTextCollection = false;
211 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] identified binary collection, version 1\n", __FILE__, __LINE__);
212 } else if (version == 0x02) {
213 isTextCollection = false;
215 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] identified binary collection, version 2\n", __FILE__, __LINE__);
216 } else if (!strncmp("ed2k", (char*) &version, 4)) {
217 isTextCollection = true;
218 growingBuffer.write(&version, 4);
220 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] identified text collection\n", __FILE__, __LINE__);
222 GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] could not identify collection!\n", __FILE__, __LINE__);