From 9c7d654cf83b867c839ffab801885bb2fa65bd7a Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Sun, 6 Jul 2008 13:00:00 +0200
Subject: [PATCH] implement file tag parsing

---
 CollectionReader.cpp | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 74 insertions(+), 1 deletion(-)

diff --git a/CollectionReader.cpp b/CollectionReader.cpp
index 00427ff..d27eba0 100644
--- a/CollectionReader.cpp
+++ b/CollectionReader.cpp
@@ -43,7 +43,7 @@ StringTag* CollectionReader::readStringTag(bool header) {
 	growingBuffer.read(&tagLength, 2);
 	GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read tag length %d.\n", __FILE__, __LINE__, tagLength);
 	char* tagValue = (char*) malloc(tagLength + 1);
-	if (!ensureBufferCapacity(tagLength)) {
+	if (!ensureBufferCapacity(tagLength) || !tagValue) {
 		return NULL;
 	}
 	growingBuffer.read(tagValue, tagLength);
@@ -187,6 +187,79 @@ ED2KLink* CollectionReader::getNextLink() {
 		firstLink = false;
 	}
 	if (collectionFileIndex < fileCollectionCount) {
+		uint32_t fileTagCount = 0;
+		if (!ensureBufferCapacity(4)) {
+			return NULL;
+		}
+		growingBuffer.read(&fileTagCount, 4);
+		GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] will read %d file tags.\n", __FILE__, __LINE__, fileTagCount);
+		StringTag* filenameTag = NULL;
+		uint64_t size = 0;
+		HashTag* hashTag = NULL;
+		for (uint32_t fileTagIndex = 0; fileTagIndex < fileTagCount; fileTagIndex++) {
+			uint8_t tagType = 0;
+			if (!ensureBufferCapacity(1)) {
+				return NULL;
+			}
+			growingBuffer.read(&tagType, 1);
+			tagType &= 0x7f;
+			GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] reading tag type %d.\n", __FILE__, __LINE__, tagType);
+			if (tagType == 0x01) {
+				hashTag = readHashTag();
+				if (!hashTag) {
+					return NULL;
+				}
+			} else if (tagType == 0x02) {
+				StringTag* stringTag = readStringTag();
+				if (!stringTag) {
+					return NULL;
+				}
+				if (stringTag->getId() == 0x01) {
+					filenameTag = stringTag;
+					GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read file name “%s”.\n", __FILE__, __LINE__, (char*) stringTag->getValue());
+				} else if (stringTag->getId() == 0xf6) {
+					GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read file comment “%s”.\n", __FILE__, __LINE__, (char*) stringTag->getValue());
+					delete stringTag;
+				}
+			} else if ((tagType == 0x03) || (tagType == 0x08) || (tagType == 0x09) || (tagType == 0x0b)) {
+				if (!ensureBufferCapacity(1)) {
+					return NULL;
+				}
+				uint8_t id = 0;
+				growingBuffer.read(&id, 1);
+				if (id == 0x02) {
+					int neededBytes = (tagType == 0x03) ? 4 : ((tagType == 0x08) ? 2 : ((tagType == 0x09) ? 1 : 8));
+					if (!ensureBufferCapacity(neededBytes)) {
+						return NULL;
+					}
+					growingBuffer.read(&size, neededBytes);
+					GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] file size is %llu bytes.\n", __FILE__, __LINE__, size);
+				} else if (id == 0xf7) {
+					uint8_t fileRating = 0;
+					if (!ensureBufferCapacity(1)) {
+						return NULL;
+					}
+					growingBuffer.read(&fileRating, 1);
+					GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] read file rating %d.\n", __FILE__, __LINE__, fileRating);
+				}
+			}
+		}
+		collectionFileIndex++;
+		growingBuffer.cut();
+		if (filenameTag && hashTag) {
+			ED2KLink* ed2kLink = new ED2KLink((char*) filenameTag->getValue(), size, hashTag->getValue());
+			delete filenameTag;
+			delete hashTag;
+			return ed2kLink;
+		} else {
+			GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] not enough data to decode file.\n", __FILE__, __LINE__);
+		}
+		if (filenameTag) {
+			delete filenameTag;
+		}
+		if (hashTag) {
+			delete hashTag;
+		}
 	} else {
 		GlobalSettings::isVerbose() && fprintf(stderr, "[%s:%d] reached end of collection.\n", __FILE__, __LINE__);
 	}
-- 
2.7.4