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EPUB3.c
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EPUB3.c
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#include "EPUB3.h"
#include "EPUB3_private.h"
const char * kEPUB3TypeID = "_EPUB3_t";
const char * kEPUB3MetadataTypeID = "_EPUB3Metadata_t";
const char * kEPUB3ManifestTypeID = "_EPUB3Manifest_t";
const char * kEPUB3ManifestItemTypeID = "_EPUB3ManifestItem_t";
const char * kEPUB3SpineTypeID = "_EPUB3Spine_t";
const char * kEPUB3SpineItemTypeID = "_EPUB3SpineItem_t";
const char * kEPUB3TocTypeID = "_EPUB3Toc_t";
const char * kEPUB3TocItemTypeID = "_EPUB3TocItem_t";
#ifndef PARSE_CONTEXT_STACK_DEPTH
#define PARSE_CONTEXT_STACK_DEPTH 64
#endif
#ifndef PARSE_CONTEXT_NCX_STACK_DEPTH
#define PARSE_CONTEXT_NCX_STACK_DEPTH 1024
#endif
#pragma mark - Public Query API
EXPORT int32_t EPUB3CountOfSequentialResources(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->spine != NULL);
return epub->spine->linearItemCount;
}
EXPORT EPUB3Error EPUB3GetPathsOfSequentialResources(EPUB3Ref epub, const char ** resources)
{
assert(epub != NULL);
assert(epub->spine != NULL);
EPUB3Error error = kEPUB3Success;
if(epub->spine->linearItemCount > 0) {
int32_t count = 0;
EPUB3SpineItemListItemPtr itemPtr = epub->spine->head;
while(itemPtr != NULL) {
if(itemPtr->item->isLinear) {
resources[count] = itemPtr->item->manifestItem->href;
count++;
}
itemPtr = itemPtr->next;
}
}
return error;
}
EXPORT int32_t EPUB3CountOfTocRootItems(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->toc != NULL);
return epub->toc->rootItemCount;
}
EXPORT EPUB3Error EPUB3GetTocRootItems(EPUB3Ref epub, EPUB3TocItemRef *tocItems)
{
assert(epub != NULL);
assert(epub->toc != NULL);
EPUB3Error error = kEPUB3Success;
if(epub->toc->rootItemCount > 0) {
int32_t count = 0;
EPUB3TocItemChildListItemPtr itemPtr = epub->toc->rootItemsHead;
while(itemPtr != NULL) {
tocItems[count] = itemPtr->item;
count++;
itemPtr = itemPtr->next;
}
}
return error;
}
EXPORT EPUB3Bool EPUB3TocItemHasParent(EPUB3TocItemRef tocItem)
{
assert(tocItem != NULL);
return tocItem->parent == NULL ? kEPUB3_NO : kEPUB3_YES;
}
EXPORT EPUB3TocItemRef EPUB3TocItemGetParent(EPUB3TocItemRef tocItem)
{
assert(tocItem != NULL);
return tocItem->parent;
}
EXPORT int32_t EPUB3TocItemCountOfChildren(EPUB3TocItemRef tocItem)
{
assert(tocItem != NULL);
return tocItem->childCount;
}
EXPORT EPUB3Error EPUB3TocItemGetChildren(EPUB3TocItemRef parent, EPUB3TocItemRef *children)
{
assert(parent != NULL);
EPUB3Error error = kEPUB3Success;
if(parent->childCount > 0) {
int32_t count = 0;
EPUB3TocItemChildListItemPtr itemPtr = parent->childrenHead;
while(itemPtr != NULL) {
children[count] = itemPtr->item;
count++;
itemPtr = itemPtr->next;
}
}
return error;
}
EXPORT char * EPUB3TocItemCopyTitle(EPUB3TocItemRef tocItem)
{
assert(tocItem != NULL);
if(tocItem->title == NULL) return NULL;
char * title = strdup(tocItem->title);
return title;
}
EXPORT char * EPUB3TocItemCopyPath(EPUB3TocItemRef tocItem)
{
assert(tocItem != NULL);
if(tocItem->href == NULL) return NULL;
return strdup(tocItem->href);
}
#pragma mark - Base Object
void EPUB3ObjectRelease(void *object)
{
if(object == NULL) return;
EPUB3ObjectRef obj = (EPUB3ObjectRef)object;
obj->_type.refCount--;
if(obj->_type.refCount == 0) {
EPUB3_FREE_AND_NULL(obj);
}
}
void EPUB3ObjectRetain(void *object)
{
if(object == NULL) return;
EPUB3ObjectRef obj = (EPUB3ObjectRef)object;
obj->_type.refCount++;
}
void * EPUB3ObjectInitWithTypeID(void *object, const char *typeID)
{
assert(object != NULL);
EPUB3ObjectRef obj = (EPUB3ObjectRef)object;
obj->_type.typeID = typeID;
obj->_type.refCount = 1;
return obj;
}
#pragma mark - Main EPUB3 Object
EPUB3Ref EPUB3Create()
{
EPUB3Ref memory = malloc(sizeof(struct EPUB3));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3TypeID);
memory->metadata = NULL;
memory->manifest = NULL;
memory->spine = NULL;
memory->toc = NULL;
memory->archive = NULL;
memory->archivePath = NULL;
memory->archiveFileCount = 0;
return memory;
}
EXPORT EPUB3Ref EPUB3CreateWithArchiveAtPath(const char * path, EPUB3Error *error)
{
assert(path != NULL);
EPUB3Ref epub = EPUB3Create();
*error = EPUB3PrepareArchiveAtPath(epub, path);
if(*error != kEPUB3Success) {
EPUB3Release(epub);
return NULL;
}
*error = EPUB3InitAndValidate(epub);
if(*error != kEPUB3Success) {
EPUB3Release(epub);
return NULL;
}
return epub;
}
EPUB3Error EPUB3PrepareArchiveAtPath(EPUB3Ref epub, const char * path)
{
assert(epub != NULL);
assert(path != NULL);
EPUB3Error error = kEPUB3Success;
unzFile archive = unzOpen(path);
if (archive != NULL)
{
epub->archive = archive;
epub->archiveFileCount = EPUB3GetFileCountInArchive(archive);
epub->archivePath = strdup(path);
}
else // unzOpen can return a NULL filestream
error = kEPUB3UnknownError;
return error;
}
EPUB3Error EPUB3InitAndValidate(EPUB3Ref epub)
{
assert(epub != NULL);
char * opfPath = NULL;
EPUB3Error error = EPUB3CopyRootFilePathFromContainer(epub, &opfPath);
if(error != kEPUB3Success) {
fprintf(stderr, "Error (%d[%d]) opening and validating epub file at %s.\n", error, __LINE__, epub->archivePath);
}
error = EPUB3InitFromOPF(epub, opfPath);
if(error != kEPUB3Success) {
fprintf(stderr, "Error (%d[%d]) parsing epub file at %s.\n", error, __LINE__, epub->archivePath);
}
EPUB3_FREE_AND_NULL(opfPath);
return error;
}
EXPORT void EPUB3Retain(EPUB3Ref epub)
{
if(epub == NULL) return;
EPUB3MetadataRetain(epub->metadata);
EPUB3ManifestRetain(epub->manifest);
EPUB3SpineRetain(epub->spine);
EPUB3ObjectRetain(epub);
}
EXPORT void EPUB3Release(EPUB3Ref epub)
{
if(epub == NULL) return;
if(epub->_type.refCount == 1) {
if(epub->archive != NULL) {
unzClose(epub->archive);
epub->archive = NULL;
}
EPUB3_FREE_AND_NULL(epub->archivePath);
}
EPUB3MetadataRelease(epub->metadata);
EPUB3ManifestRelease(epub->manifest);
EPUB3SpineRelease(epub->spine);
EPUB3ObjectRelease(epub);
}
EPUB3MetadataRef EPUB3CopyMetadata(EPUB3Ref epub)
{
assert(epub != NULL);
if(epub->metadata == NULL) {
return NULL;
}
EPUB3MetadataRef copy = EPUB3MetadataCreate();
copy->ncxItem = epub->metadata->ncxItem;
EPUB3ManifestItemRetain(copy->ncxItem);
(void)EPUB3MetadataSetTitle(copy, epub->metadata->title);
(void)EPUB3MetadataSetIdentifier(copy, epub->metadata->identifier);
(void)EPUB3MetadataSetLanguage(copy, epub->metadata->language);
return copy;
}
void EPUB3SetMetadata(EPUB3Ref epub, EPUB3MetadataRef metadata)
{
assert(epub != NULL);
if(epub->metadata != NULL) {
EPUB3MetadataRelease(epub->metadata);
}
if(metadata != NULL) {
EPUB3MetadataRetain(metadata);
}
epub->metadata = metadata;
}
void EPUB3SetManifest(EPUB3Ref epub, EPUB3ManifestRef manifest)
{
assert(epub != NULL);
if(epub->manifest != NULL) {
EPUB3ManifestRelease(epub->manifest);
}
if(manifest != NULL) {
EPUB3ManifestRetain(manifest);
}
epub->manifest = manifest;
}
void EPUB3SetSpine(EPUB3Ref epub, EPUB3SpineRef spine)
{
assert(epub != NULL);
if(epub->spine != NULL) {
EPUB3SpineRelease(epub->spine);
}
if(spine != NULL) {
EPUB3SpineRetain(spine);
}
epub->spine = spine;
}
void EPUB3SetStringValue(char ** location, const char *value)
{
EPUB3_FREE_AND_NULL(*location);
if(value == NULL) {
return;
}
char * valueCopy = strdup(value);
*location = valueCopy;
}
char * EPUB3CopyStringValue(char ** location)
{
if(*location == NULL) return NULL;
char * copy = strdup(*location);
return copy;
}
EXPORT char * EPUB3CopyTitle(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->metadata != NULL);
return EPUB3CopyStringValue(&(epub->metadata->title));
}
EXPORT char * EPUB3CopyIdentifier(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->metadata != NULL);
return EPUB3CopyStringValue(&(epub->metadata->identifier));
}
EXPORT char * EPUB3CopyLanguage(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->metadata != NULL);
return EPUB3CopyStringValue(&(epub->metadata->language));
}
EXPORT char * EPUB3CopyCoverImagePath(EPUB3Ref epub)
{
assert(epub != NULL);
assert(epub->metadata != NULL);
assert(epub->manifest != NULL);
if(epub->metadata->coverImageId == NULL) return NULL;
EPUB3ManifestItemListItemPtr coverItemPtr = EPUB3ManifestFindItemWithId(epub->manifest, epub->metadata->coverImageId);
return (coverItemPtr != NULL) ? EPUB3CopyStringValue(&(coverItemPtr->item->href)) : NULL;
}
EXPORT EPUB3Error EPUB3CopyCoverImage(EPUB3Ref epub, void ** bytes, uint32_t * byteCount)
{
assert(epub != NULL);
*byteCount = 0U;
char * path = EPUB3CopyCoverImagePath(epub);
if(path == NULL)
{
return kEPUB3FileNotFoundInArchiveError;
}
char * rootFilePath = NULL;
EPUB3Error error = EPUB3CopyRootFilePathFromContainer(epub, &rootFilePath);
if(error == kEPUB3Success) {
char * rootPath = EPUB3CopyOfPathByDeletingLastPathComponent(rootFilePath);
char * fullPath = EPUB3CopyOfPathByAppendingPathComponent(rootPath, path);
error = EPUB3CopyFileIntoBuffer(epub, bytes, NULL, byteCount, fullPath);
EPUB3_FREE_AND_NULL(rootPath);
EPUB3_FREE_AND_NULL(fullPath);
}
EPUB3_FREE_AND_NULL(path);
EPUB3_FREE_AND_NULL(rootFilePath);
return error;
}
#pragma mark - Table of Contents
EPUB3TocRef EPUB3TocCreate()
{
EPUB3TocRef memory = malloc(sizeof(struct EPUB3Toc));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3TocTypeID);
memory->rootItemCount = 0;
memory->rootItemsHead = NULL;
memory->rootItemsTail = NULL;
return memory;
}
void EPUB3TocRetain(EPUB3TocRef toc)
{
if(toc == NULL) return;
EPUB3TocItemChildListItemPtr itemPtr;
for(itemPtr = toc->rootItemsHead; itemPtr != NULL; itemPtr = itemPtr->next) {
EPUB3TocItemRetain(itemPtr->item);
}
EPUB3ObjectRetain(toc);
}
void EPUB3TocRelease(EPUB3TocRef toc)
{
if(toc == NULL) return;
if(toc->_type.refCount == 1) {
EPUB3TocItemChildListItemPtr itemPtr = toc->rootItemsHead;
int totalItemsToFree = toc->rootItemCount;
while(itemPtr != NULL) {
assert(--totalItemsToFree >= 0);
EPUB3TocItemRelease(itemPtr->item);
EPUB3TocItemChildListItemPtr tmp = itemPtr;
itemPtr = itemPtr->next;
toc->rootItemsHead = itemPtr;
EPUB3_FREE_AND_NULL(tmp);
}
toc->rootItemCount = 0;
}
EPUB3ObjectRelease(toc);
}
EPUB3TocItemRef EPUB3TocItemCreate()
{
EPUB3TocItemRef memory = malloc(sizeof(struct EPUB3TocItem));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3TocItemTypeID);
memory->title = NULL;
memory->href = NULL;
memory->parent = NULL;
memory->childCount = 0;
memory->childrenHead = NULL;
memory->childrenTail = NULL;
return memory;
}
void EPUB3TocItemRetain(EPUB3TocItemRef item)
{
if(item == NULL) return;
EPUB3ObjectRetain(item);
}
void EPUB3TocItemRelease(EPUB3TocItemRef item)
{
if(item == NULL) return;
if(item->_type.refCount == 1) {
item->parent = NULL; // zero weak ref
EPUB3_FREE_AND_NULL(item->title);
EPUB3_FREE_AND_NULL(item->href);
int totalChildrenToFree = item->childCount;
EPUB3TocItemChildListItemPtr itemPtr = item->childrenHead;
while(itemPtr != NULL) {
assert(--totalChildrenToFree >= 0);
EPUB3TocItemRelease(itemPtr->item);
EPUB3TocItemChildListItemPtr tmp = itemPtr;
itemPtr = itemPtr->next;
item->childrenHead = itemPtr;
EPUB3_FREE_AND_NULL(tmp);
}
item->childCount = 0;
}
EPUB3ObjectRelease(item);
}
void EPUB3TocAddRootItem(EPUB3TocRef toc, EPUB3TocItemRef item)
{
assert(toc != NULL);
assert(item != NULL);
EPUB3TocItemRetain(item);
EPUB3TocItemChildListItemPtr itemPtr = (EPUB3TocItemChildListItemPtr) calloc(1, sizeof(struct EPUB3TocItemChildListItem));
itemPtr->item = item;
if(toc->rootItemsHead == NULL) {
// First item
toc->rootItemsHead = itemPtr;
toc->rootItemsTail = itemPtr;
} else {
toc->rootItemsTail->next = itemPtr;
toc->rootItemsTail = itemPtr;
}
toc->rootItemCount++;
}
void EPUB3TocItemAppendChild(EPUB3TocItemRef parent, EPUB3TocItemRef child)
{
assert(parent != NULL);
assert(child != NULL);
EPUB3TocItemRetain(child);
EPUB3TocItemChildListItemPtr itemPtr = (EPUB3TocItemChildListItemPtr) calloc(1, sizeof(struct EPUB3TocItemChildListItem));
itemPtr->item = child;
if(parent->childrenHead == NULL) {
// First item
parent->childrenHead = itemPtr;
parent->childrenTail = itemPtr;
} else {
parent->childrenTail->next = itemPtr;
parent->childrenTail = itemPtr;
}
child->parent = parent;
parent->childCount++;
}
#pragma mark - Metadata
void EPUB3MetadataRetain(EPUB3MetadataRef metadata)
{
if(metadata == NULL) return;
EPUB3ManifestItemRetain(metadata->ncxItem);
EPUB3ObjectRetain(metadata);
}
void EPUB3MetadataRelease(EPUB3MetadataRef metadata)
{
if(metadata == NULL) return;
if(metadata->_type.refCount == 1) {
EPUB3ManifestItemRelease(metadata->ncxItem);
metadata->ncxItem = NULL;
EPUB3_FREE_AND_NULL(metadata->title);
EPUB3_FREE_AND_NULL(metadata->_uniqueIdentifierID);
EPUB3_FREE_AND_NULL(metadata->identifier);
EPUB3_FREE_AND_NULL(metadata->language);
EPUB3_FREE_AND_NULL(metadata->coverImageId);
}
EPUB3ObjectRelease(metadata);
}
EPUB3MetadataRef EPUB3MetadataCreate()
{
EPUB3MetadataRef memory = malloc(sizeof(struct EPUB3Metadata));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3MetadataTypeID);
memory->ncxItem = NULL;
memory->title = NULL;
memory->_uniqueIdentifierID = NULL;
memory->identifier = NULL;
memory->language = NULL;
memory->coverImageId = NULL;
return memory;
}
void EPUB3MetadataSetNCXItem(EPUB3MetadataRef metadata, EPUB3ManifestItemRef ncxItem)
{
assert(metadata != NULL);
if(metadata->ncxItem != NULL) {
EPUB3ManifestItemRelease(metadata->ncxItem);
}
EPUB3ManifestItemRetain(ncxItem);
metadata->ncxItem = ncxItem;
}
void EPUB3MetadataSetTitle(EPUB3MetadataRef metadata, const char * title)
{
assert(metadata != NULL);
EPUB3SetStringValue(&(metadata->title), title);
}
void EPUB3MetadataSetIdentifier(EPUB3MetadataRef metadata, const char * identifier)
{
assert(metadata != NULL);
EPUB3SetStringValue(&(metadata->identifier), identifier);
}
void EPUB3MetadataSetLanguage(EPUB3MetadataRef metadata, const char * language)
{
assert(metadata != NULL);
EPUB3SetStringValue(&(metadata->language), language);
}
void EPUB3MetadataSetCoverImageId(EPUB3MetadataRef metadata, const char * coverImgId)
{
assert(metadata != NULL);
EPUB3SetStringValue(&(metadata->coverImageId), coverImgId);
}
#pragma mark - Manifest
void EPUB3ManifestRetain(EPUB3ManifestRef manifest)
{
if(manifest == NULL) return;
for(int i = 0; i < MANIFEST_HASH_SIZE; i++) {
EPUB3ManifestItemListItemPtr itemPtr = manifest->itemTable[i];
while(itemPtr != NULL) {
EPUB3ManifestItemRetain(itemPtr->item);
itemPtr = itemPtr->next;
}
}
EPUB3ObjectRetain(manifest);
}
void EPUB3ManifestRelease(EPUB3ManifestRef manifest)
{
if(manifest == NULL) return;
for(int i = 0; i < MANIFEST_HASH_SIZE; i++) {
EPUB3ManifestItemListItemPtr next = manifest->itemTable[i];
while(next != NULL) {
EPUB3ManifestItemRelease(next->item);
EPUB3ManifestItemListItemPtr tmp = next;
next = tmp->next;
if(manifest->_type.refCount == 1) {
EPUB3_FREE_AND_NULL(tmp);
}
}
if(manifest->_type.refCount == 1) {
manifest->itemTable[i] = NULL;
}
}
if(manifest->_type.refCount == 1) {
manifest->itemCount = 0;
}
EPUB3ObjectRelease(manifest);
}
void EPUB3ManifestItemRetain(EPUB3ManifestItemRef item)
{
if(item == NULL) return;
EPUB3ObjectRetain(item);
}
void EPUB3ManifestItemRelease(EPUB3ManifestItemRef item)
{
if(item == NULL) return;
if(item->_type.refCount == 1) {
EPUB3_FREE_AND_NULL(item->itemId);
EPUB3_FREE_AND_NULL(item->href);
EPUB3_FREE_AND_NULL(item->mediaType);
EPUB3_FREE_AND_NULL(item->properties);
}
EPUB3ObjectRelease(item);
}
EPUB3ManifestRef EPUB3ManifestCreate()
{
EPUB3ManifestRef memory = malloc(sizeof(struct EPUB3Manifest));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3ManifestTypeID);
memory->itemCount = 0;
for(int i = 0; i < MANIFEST_HASH_SIZE; i++) {
memory->itemTable[i] = NULL;
}
return memory;
}
EPUB3ManifestItemRef EPUB3ManifestItemCreate()
{
EPUB3ManifestItemRef memory = malloc(sizeof(struct EPUB3ManifestItem));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3ManifestItemTypeID);
memory->itemId = NULL;
memory->href = NULL;
memory->mediaType = NULL;
memory->properties = NULL;
return memory;
}
void EPUB3ManifestInsertItem(EPUB3ManifestRef manifest, EPUB3ManifestItemRef item)
{
assert(manifest != NULL);
assert(item != NULL);
assert(item->itemId != NULL);
EPUB3ManifestItemRetain(item);
EPUB3ManifestItemListItemPtr itemPtr = EPUB3ManifestFindItemWithId(manifest, item->itemId);
if(itemPtr == NULL) {
itemPtr = (EPUB3ManifestItemListItemPtr) malloc(sizeof(struct EPUB3ManifestItemListItem));
int32_t bucket = SuperFastHash(item->itemId, (int32_t)strlen(item->itemId)) % MANIFEST_HASH_SIZE;
itemPtr->item = item;
itemPtr->next = manifest->itemTable[bucket];
manifest->itemTable[bucket] = itemPtr;
manifest->itemCount++;
} else {
EPUB3ManifestItemRelease(itemPtr->item);
itemPtr->item = item;
}
}
EPUB3ManifestItemRef EPUB3ManifestCopyItemWithId(EPUB3ManifestRef manifest, const char * itemId)
{
assert(manifest != NULL);
assert(itemId != NULL);
EPUB3ManifestItemListItemPtr itemPtr = EPUB3ManifestFindItemWithId(manifest, itemId);
if(itemPtr == NULL) {
return NULL;
}
EPUB3ManifestItemRef item = itemPtr->item;
EPUB3ManifestItemRef copy = EPUB3ManifestItemCreate();
copy->itemId = item->itemId != NULL ? strdup(item->itemId) : NULL;
copy->href = item->href != NULL ? strdup(item->href) : NULL;
copy->mediaType = item->mediaType != NULL ? strdup(item->mediaType) : NULL;
copy->properties = item->properties != NULL ? strdup(item->properties) : NULL;
return copy;
}
EPUB3ManifestItemListItemPtr EPUB3ManifestFindItemWithId(EPUB3ManifestRef manifest, const char * itemId)
{
assert(manifest != NULL);
assert(itemId != NULL);
int32_t bucket = SuperFastHash(itemId, (int32_t)strlen(itemId)) % MANIFEST_HASH_SIZE;
EPUB3ManifestItemListItemPtr itemPtr = manifest->itemTable[bucket];
while(itemPtr != NULL) {
if(strcmp(itemId, itemPtr->item->itemId) == 0) {
return itemPtr;
}
itemPtr = itemPtr->next;
}
return NULL;
}
#pragma mark - Spine
EPUB3SpineRef EPUB3SpineCreate()
{
EPUB3SpineRef memory = malloc(sizeof(struct EPUB3Spine));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3SpineTypeID);
memory->itemCount = 0;
memory->linearItemCount = 0;
memory->head = NULL;
memory->tail = NULL;
return memory;
}
void EPUB3SpineRetain(EPUB3SpineRef spine)
{
if(spine == NULL) return;
EPUB3SpineItemListItemPtr itemPtr;
for(itemPtr = spine->head; itemPtr != NULL; itemPtr = itemPtr->next) {
EPUB3SpineItemRetain(itemPtr->item);
}
EPUB3ObjectRetain(spine);
}
void EPUB3SpineRelease(EPUB3SpineRef spine)
{
if(spine == NULL) return;
if(spine->_type.refCount == 1) {
EPUB3SpineItemListItemPtr itemPtr = spine->head;
int totalItemsToFree = spine->itemCount;
while(itemPtr != NULL) {
assert(--totalItemsToFree >= 0);
EPUB3SpineItemRelease(itemPtr->item);
EPUB3SpineItemListItemPtr tmp = itemPtr;
itemPtr = itemPtr->next;
spine->head = itemPtr;
EPUB3_FREE_AND_NULL(tmp);
}
spine->itemCount = 0;
spine->linearItemCount = 0;
}
EPUB3ObjectRelease(spine);
}
EPUB3SpineItemRef EPUB3SpineItemCreate()
{
EPUB3SpineItemRef memory = malloc(sizeof(struct EPUB3SpineItem));
memory = EPUB3ObjectInitWithTypeID(memory, kEPUB3SpineItemTypeID);
memory->isLinear = kEPUB3_NO;
memory->idref = NULL;
memory->manifestItem = NULL;
return memory;
}
void EPUB3SpineItemRetain(EPUB3SpineItemRef item)
{
if(item == NULL) return;
EPUB3ObjectRetain(item);
}
void EPUB3SpineItemRelease(EPUB3SpineItemRef item)
{
if(item == NULL) return;
if(item->_type.refCount == 1) {
item->manifestItem = NULL; // zero weak ref
EPUB3_FREE_AND_NULL(item->idref);
}
EPUB3ObjectRelease(item);
}
void EPUB3SpineItemSetManifestItem(EPUB3SpineItemRef spineItem, EPUB3ManifestItemRef manifestItem)
{
assert(spineItem != NULL);
spineItem->manifestItem = manifestItem;
spineItem->idref = strdup(manifestItem->itemId);
}
void EPUB3SpineAppendItem(EPUB3SpineRef spine, EPUB3SpineItemRef item)
{
assert(spine != NULL);
assert(item != NULL);
EPUB3SpineItemRetain(item);
EPUB3SpineItemListItemPtr itemPtr = (EPUB3SpineItemListItemPtr) calloc(1, sizeof(struct EPUB3SpineItemListItem));
itemPtr->item = item;
if(spine->head == NULL) {
// First item
spine->head = itemPtr;
spine->tail = itemPtr;
} else {
spine->tail->next = itemPtr;
spine->tail = itemPtr;
}
spine->itemCount++;
}
#pragma mark - OPF XML Parsing
EPUB3Error EPUB3InitFromOPF(EPUB3Ref epub, const char * opfFilename)
{
assert(epub != NULL);
assert(opfFilename != NULL);
if(epub->archive == NULL) return kEPUB3ArchiveUnavailableError;
if(epub->metadata == NULL) {
epub->metadata = EPUB3MetadataCreate();
}
if(epub->manifest == NULL) {
epub->manifest = EPUB3ManifestCreate();
}
if(epub->spine == NULL) {
epub->spine = EPUB3SpineCreate();
}
if(epub->toc == NULL) {
epub->toc = EPUB3TocCreate();
}
void *buffer = NULL;
uint32_t bufferSize = 0;
uint32_t bytesCopied;
EPUB3Error error = kEPUB3Success;
error = EPUB3CopyFileIntoBuffer(epub, &buffer, &bufferSize, &bytesCopied, opfFilename);
if(error == kEPUB3Success) {
error = EPUB3ParseOPFFromData(epub, buffer, bufferSize);
EPUB3_FREE_AND_NULL(buffer);
}
if(error == kEPUB3Success) { //&& epub->metadata->version == kEPUB3Version_2) {
// Parse NCX only if this is a v2 epub (per the EPUB 3 spec)
if(epub->metadata->ncxItem != NULL) {
char * ncxPath = strdup(epub->metadata->ncxItem->href);
if(*ncxPath != '/') {
char * opfRoot = EPUB3CopyOfPathByDeletingLastPathComponent(opfFilename);
char * fullPath = EPUB3CopyOfPathByAppendingPathComponent(opfRoot, ncxPath);
free(ncxPath);
free(opfRoot);
ncxPath = fullPath;
}
bufferSize = 0;
error = EPUB3CopyFileIntoBuffer(epub, &buffer, &bufferSize, &bytesCopied, ncxPath);
if(error == kEPUB3Success) {
error = EPUB3ParseNCXFromData(epub, buffer, bufferSize);
}
free(ncxPath);
EPUB3_FREE_AND_NULL(buffer);
}
}
return error;
}
void _EPUB3DumpXMLParseContextStack(EPUB3XMLParseContextPtr *ctxPtr)
{
EPUB3XMLParseContextPtr top = *ctxPtr;
fprintf(stderr, "== Parse Context Stack ==\n");
for(;;) {
fprintf(stderr, "%s\n", (const char *)top->tagName);
if(top->state == kEPUB3NCXStateRoot || top->state == kEPUB3OPFStateRoot) break;
top--;
}
fprintf(stderr, "== END Context Stack ==\n");
}
void EPUB3SaveParseContext(EPUB3XMLParseContextPtr *ctxPtr, EPUB3XMLParseState state, const xmlChar * tagName, int32_t attrCount, char ** attrs, EPUB3Bool shouldParseTextNode, void * userInfo)
{
(*ctxPtr)++;
(*ctxPtr)->state = state;
(*ctxPtr)->tagName = tagName;
(*ctxPtr)->attributeCount = attrCount;
(*ctxPtr)->attributes = attrs;
(*ctxPtr)->shouldParseTextNode = shouldParseTextNode;
(*ctxPtr)->userInfo = userInfo;
}
void EPUB3PopAndFreeParseContext(EPUB3XMLParseContextPtr *contextPtr)
{
EPUB3XMLParseContextPtr ctx = (*contextPtr);
(*contextPtr)--;
for (int i = 0; i < ctx->attributeCount; i++) {
char * key = ctx->attributes[i * 2];
char * val = ctx->attributes[i * 2 + 1];
EPUB3_FREE_AND_NULL(key);
EPUB3_FREE_AND_NULL(val);
}
}
EPUB3Error EPUB3ProcessXMLReaderNodeForMetadataInOPF(EPUB3Ref epub, xmlTextReaderPtr reader, EPUB3XMLParseContextPtr *context)
{
assert(epub != NULL);
assert(reader != NULL);
EPUB3Error error = kEPUB3Success;
const xmlChar *name = xmlTextReaderConstLocalName(reader);
xmlReaderTypes nodeType = xmlTextReaderNodeType(reader);
switch(nodeType)
{
case XML_READER_TYPE_ELEMENT:
{
if(!xmlTextReaderIsEmptyElement(reader)) {
(void)EPUB3SaveParseContext(context, kEPUB3OPFStateMetadata, name, 0, NULL, kEPUB3_YES, NULL);
// Only parse text node for the identifier marked as unique-identifier in the package tag
// see: http://idpf.org/epub/30/spec/epub30-publications.html#sec-opf-dcidentifier
if(xmlStrcmp(name, BAD_CAST "identifier") == 0) {
if(xmlTextReaderHasAttributes(reader)) {
xmlChar * itemId = xmlTextReaderGetAttribute(reader, BAD_CAST "id");
if(itemId == NULL) {
(*context)->shouldParseTextNode = kEPUB3_NO;
}
else if(itemId != NULL && xmlStrcmp(itemId, BAD_CAST epub->metadata->_uniqueIdentifierID) != 0) {
(*context)->shouldParseTextNode = kEPUB3_NO;
}
EPUB3_XML_FREE_AND_NULL(itemId);
}
break;
}
}
if(epub->metadata->version == kEPUB3Version_2) {
// There is no standard for cover images in EPUB 2. This is the accepted ad hoc method for defining one
// http://blog.threepress.org/2009/11/20/best-practices-in-epub-cover-images/
// http://www.mobipocket.com/dev/article.asp?BaseFolder=prcgen&File=cover.htm#IDPF2
if(xmlStrcmp(name, BAD_CAST "meta") == 0) {
if(xmlTextReaderHasAttributes(reader)) {
xmlChar * metaName = xmlTextReaderGetAttribute(reader, BAD_CAST "name");
if(metaName != NULL && xmlStrcmp(metaName, BAD_CAST "cover") == 0) {
xmlChar * coverId = xmlTextReaderGetAttribute(reader, BAD_CAST "content");
EPUB3MetadataSetCoverImageId(epub->metadata, (const char *)coverId);
EPUB3_XML_FREE_AND_NULL(coverId);
}
EPUB3_XML_FREE_AND_NULL(metaName);
}
}
}
break;
}
case XML_READER_TYPE_TEXT:
{
const xmlChar *value = xmlTextReaderValue(reader);
if(value != NULL && (*context)->shouldParseTextNode) {
if(xmlStrcmp((*context)->tagName, BAD_CAST "title") == 0) {
(void)EPUB3MetadataSetTitle(epub->metadata, (const char *)value);
}
else if(xmlStrcmp((*context)->tagName, BAD_CAST "identifier") == 0) {
(void)EPUB3MetadataSetIdentifier(epub->metadata, (const char *)value);
}
else if(xmlStrcmp((*context)->tagName, BAD_CAST "language") == 0) {
(void)EPUB3MetadataSetLanguage(epub->metadata, (const char *)value);
}
}