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Changes On Branch 5aadfc2b051e7a27
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Changes In Branch add-inode Through [5aadfc2b05] Excluding Merge-Ins

This is equivalent to a diff from d17d8bb449 to 5aadfc2b05

2020-04-13
20:25
Merged in trunk Leaf check-in: a178887263 user: rkeene tags: add-inode
19:19
Added MSan/ASan targets check-in: 7d5fcf4486 user: rkeene tags: trunk
17:58
Ensure inode lookups are within bounds check-in: 5aadfc2b05 user: rkeene tags: add-inode
17:11
Added start of ABI change to allow lookups by inode as an optimization check-in: 142a373444 user: rkeene tags: add-inode
15:50
Fixed typo in last commit check-in: d17d8bb449 user: rkeene tags: trunk
15:47
Added an "--static-init" option to creation to make the Xvfs_fsName_Init function static, if needed to be included into a .c file check-in: 717062426a user: rkeene tags: trunk

Modified lib/xvfs/xvfs.c.rvt from [2be0a65534] to [6cafb9a4b1].

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	pathLen = strlen(path);

<?= [dict get $hashTable body] ?>

	return(XVFS_NAME_LOOKUP_ERROR);
}

static const char **xvfs_<?= $::xvfs::fsName ?>_getChildren(const char *path, Tcl_WideInt *count) {
	const struct xvfs_file_data *fileInfo;
	long inode;

	/*
	 * Validate input parameters
	 */
	if (count == NULL) {
		return(NULL);
	}
	
	/*










	 * Get the inode from the lookup function
	 */
	inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
	if (inode == XVFS_NAME_LOOKUP_ERROR) {
		*count = XVFS_RV_ERR_ENOENT;
		return(NULL);

	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];

	/*
	 * Ensure this is a directory
	 */
	if (fileInfo->type != XVFS_FILE_TYPE_DIR) {
		*count = XVFS_RV_ERR_ENOTDIR;
		return(NULL);
	}
	
	*count = fileInfo->size;
	return(fileInfo->data.dirChildren);
}

static const unsigned char *xvfs_<?= $::xvfs::fsName ?>_getData(const char *path, Tcl_WideInt start, Tcl_WideInt *length) {
	const struct xvfs_file_data *fileInfo;
	Tcl_WideInt resultLength;
	long inode;

	/*
	 * Validate input parameters
	 */
	if (length == NULL) {
		return(NULL);
	}
	
	if (start < 0) {
		*length = XVFS_RV_ERR_EINVAL;
		return(NULL);
	}
	
	if (*length < 0) {
		*length = XVFS_RV_ERR_EINVAL;
		return(NULL);
	}
	

	/*










	 * Get the inode from the lookup function
	 */
	inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
	if (inode == XVFS_NAME_LOOKUP_ERROR) {
		*length = XVFS_RV_ERR_ENOENT;
		return(NULL);

	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];

	/*
	 * Ensure this is a file that can be read
	 */








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	pathLen = strlen(path);

<?= [dict get $hashTable body] ?>

	return(XVFS_NAME_LOOKUP_ERROR);
}

static const char **xvfs_<?= $::xvfs::fsName ?>_getChildren(const char *path, long inode, Tcl_WideInt *count) {
	const struct xvfs_file_data *fileInfo;


	/*
	 * Validate input parameters
	 */
	if (count == NULL) {
		return(NULL);
	}
	
	/*
	 * Use user-supplied inode, or look up the path
	 */
	if (inode != XVFS_INODE_NULL) {
		if (inode >= <?= [llength $::xvfs::outputFiles] ?> || inode < 0) {
			inode = XVFS_INODE_NULL;
			path = NULL;
		}
	}
	if (inode == XVFS_INODE_NULL) {
		/*
		 * Get the inode from the lookup function
		 */
		inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
		if (inode == XVFS_NAME_LOOKUP_ERROR) {
			*count = XVFS_RV_ERR_ENOENT;
			return(NULL);
		}
	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];

	/*
	 * Ensure this is a directory
	 */
	if (fileInfo->type != XVFS_FILE_TYPE_DIR) {
		*count = XVFS_RV_ERR_ENOTDIR;
		return(NULL);
	}
	
	*count = fileInfo->size;
	return(fileInfo->data.dirChildren);
}

static const unsigned char *xvfs_<?= $::xvfs::fsName ?>_getData(const char *path, long inode, Tcl_WideInt start, Tcl_WideInt *length) {
	const struct xvfs_file_data *fileInfo;
	Tcl_WideInt resultLength;


	/*
	 * Validate input parameters
	 */
	if (length == NULL) {
		return(NULL);
	}
	
	if (start < 0) {
		*length = XVFS_RV_ERR_EINVAL;
		return(NULL);
	}
	
	if (*length < 0) {
		*length = XVFS_RV_ERR_EINVAL;
		return(NULL);
	}


	/*
	 * Use user-supplied inode, or look up the path
	 */
	if (inode != XVFS_INODE_NULL) {
		if (inode >= <?= [llength $::xvfs::outputFiles] ?> || inode < 0) {
			inode = XVFS_INODE_NULL;
			path = NULL;
		}
	}
	if (inode == XVFS_INODE_NULL) {
		/*
		 * Get the inode from the lookup function
		 */
		inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
		if (inode == XVFS_NAME_LOOKUP_ERROR) {
			*length = XVFS_RV_ERR_ENOENT;
			return(NULL);
		}
	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];

	/*
	 * Ensure this is a file that can be read
	 */
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	/*
	 * Return the data
	 */
	return(fileInfo->data.fileContents + start);
}

static int xvfs_<?= $::xvfs::fsName ?>_getStat(const char *path, Tcl_StatBuf *statBuf) {
	const struct xvfs_file_data *fileInfo;
	long inode;

	/*
	 * Validate input parameters
	 */
	if (!statBuf) {
		return(XVFS_RV_ERR_EINVAL);
	}
	
	/*










	 * Get the inode from the lookup function
	 */
	inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
	if (inode == XVFS_NAME_LOOKUP_ERROR) {
		return(XVFS_RV_ERR_ENOENT);

	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];
	
	statBuf->st_dev   = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
	statBuf->st_rdev  = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
	statBuf->st_ino   = inode;








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	/*
	 * Return the data
	 */
	return(fileInfo->data.fileContents + start);
}

static int xvfs_<?= $::xvfs::fsName ?>_getStat(const char *path, long inode, Tcl_StatBuf *statBuf) {
	const struct xvfs_file_data *fileInfo;


	/*
	 * Validate input parameters
	 */
	if (!statBuf) {
		return(XVFS_RV_ERR_EINVAL);
	}
	
	/*
	 * Use user-supplied inode, or look up the path
	 */
	if (inode != XVFS_INODE_NULL) {
		if (inode >= <?= [llength $::xvfs::outputFiles] ?> || inode < 0) {
			inode = XVFS_INODE_NULL;
			path = NULL;
		}
	}
	if (inode == XVFS_INODE_NULL) {
		/*
		 * Get the inode from the lookup function
		 */
		inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
		if (inode == XVFS_NAME_LOOKUP_ERROR) {
			return(XVFS_RV_ERR_ENOENT);
		}
	}
	
	fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];
	
	statBuf->st_dev   = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
	statBuf->st_rdev  = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
	statBuf->st_ino   = inode;
︙︙

Modified xvfs-core.c from [acc58f104b] to [49217ccb09].

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/*
 * Xvfs Memory Channel
 */
struct xvfs_tclfs_channel_id {
	Tcl_Channel channel;
	struct xvfs_tclfs_instance_info *fsInstanceInfo;
	Tcl_Obj *path;
	Tcl_WideInt currentOffset;
	Tcl_WideInt fileSize;
	int eofMarked;
	int queuedEvents;
	int closed;
};
struct xvfs_tclfs_channel_event {








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/*
 * Xvfs Memory Channel
 */
struct xvfs_tclfs_channel_id {
	Tcl_Channel channel;
	struct xvfs_tclfs_instance_info *fsInstanceInfo;
	long inode;
	Tcl_WideInt currentOffset;
	Tcl_WideInt fileSize;
	int eofMarked;
	int queuedEvents;
	int closed;
};
struct xvfs_tclfs_channel_event {
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	Tcl_StatBuf fileInfo;
	Tcl_Obj *channelName;
	int statRet;

	XVFS_DEBUG_ENTER;
	XVFS_DEBUG_PRINTF("Opening file \"%s\" ...", Tcl_GetString(path));

	statRet = instanceInfo->fsInfo->getStatProc(Tcl_GetString(path), &fileInfo);
	if (statRet < 0) {
		XVFS_DEBUG_PRINTF("... failed: %s", xvfs_strerror(statRet));

		xvfs_setresults_error(interp, XVFS_RV_ERR_ENOENT);

		XVFS_DEBUG_LEAVE;
		return(NULL);








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	Tcl_StatBuf fileInfo;
	Tcl_Obj *channelName;
	int statRet;

	XVFS_DEBUG_ENTER;
	XVFS_DEBUG_PRINTF("Opening file \"%s\" ...", Tcl_GetString(path));

	statRet = instanceInfo->fsInfo->getStatProc(Tcl_GetString(path), XVFS_INODE_NULL, &fileInfo);
	if (statRet < 0) {
		XVFS_DEBUG_PRINTF("... failed: %s", xvfs_strerror(statRet));

		xvfs_setresults_error(interp, XVFS_RV_ERR_ENOENT);

		XVFS_DEBUG_LEAVE;
		return(NULL);
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	channelInstanceData = (struct xvfs_tclfs_channel_id *) Tcl_Alloc(sizeof(*channelInstanceData));
	channelInstanceData->currentOffset = 0;
	channelInstanceData->eofMarked = 0;
	channelInstanceData->queuedEvents = 0;
	channelInstanceData->closed = 0;
	channelInstanceData->channel = NULL;


	channelName = Tcl_ObjPrintf("xvfs0x%llx", (unsigned long long) channelInstanceData);
	if (!channelName) {
		XVFS_DEBUG_PUTS("... failed");

		Tcl_Free((char *) channelInstanceData);

		XVFS_DEBUG_LEAVE;
		return(NULL);
	}
	Tcl_IncrRefCount(channelName);

	channelInstanceData->fsInstanceInfo = instanceInfo;
	channelInstanceData->fileSize = fileInfo.st_size;
	channelInstanceData->path = path;
	Tcl_IncrRefCount(path);

	channel = Tcl_CreateChannel(&xvfs_tclfs_channelType, Tcl_GetString(channelName), channelInstanceData, TCL_READABLE);
	Tcl_DecrRefCount(channelName);
	if (!channel) {
		XVFS_DEBUG_PUTS("... failed");

		Tcl_DecrRefCount(path);








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	channelInstanceData = (struct xvfs_tclfs_channel_id *) Tcl_Alloc(sizeof(*channelInstanceData));
	channelInstanceData->currentOffset = 0;
	channelInstanceData->eofMarked = 0;
	channelInstanceData->queuedEvents = 0;
	channelInstanceData->closed = 0;
	channelInstanceData->channel = NULL;
	channelInstanceData->inode = fileInfo.st_ino;

	channelName = Tcl_ObjPrintf("xvfs0x%llx", (unsigned long long) channelInstanceData);
	if (!channelName) {
		XVFS_DEBUG_PUTS("... failed");

		Tcl_Free((char *) channelInstanceData);

		XVFS_DEBUG_LEAVE;
		return(NULL);
	}
	Tcl_IncrRefCount(channelName);

	channelInstanceData->fsInstanceInfo = instanceInfo;
	channelInstanceData->fileSize = fileInfo.st_size;



	channel = Tcl_CreateChannel(&xvfs_tclfs_channelType, Tcl_GetString(channelName), channelInstanceData, TCL_READABLE);
	Tcl_DecrRefCount(channelName);
	if (!channel) {
		XVFS_DEBUG_PUTS("... failed");

		Tcl_DecrRefCount(path);
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		Tcl_QueueEvent((Tcl_Event *) event, TCL_QUEUE_TAIL);

		XVFS_DEBUG_LEAVE;
		return(0);
	}

	Tcl_DecrRefCount(channelInstanceData->path);
	Tcl_Free((char *) channelInstanceData);

	XVFS_DEBUG_PUTS("... ok");

	XVFS_DEBUG_LEAVE;
	return(0);
}

static int xvfs_tclfs_readChannel(ClientData channelInstanceData_p, char *buf, int bufSize, int *errorCodePtr) {
	struct xvfs_tclfs_channel_id *channelInstanceData;
	const unsigned char *data;
	Tcl_WideInt offset, length;
	char *path;

	channelInstanceData = (struct xvfs_tclfs_channel_id *) channelInstanceData_p;

	/*
	 * If we are already at the end of the file we can skip
	 * attempting to read it
	 */
	if (channelInstanceData->eofMarked) {
		return(0);
	}

	path = Tcl_GetString(channelInstanceData->path);
	offset = channelInstanceData->currentOffset;
	length = bufSize;

	data = channelInstanceData->fsInstanceInfo->fsInfo->getDataProc(path, offset, &length);

	if (length < 0) {
		*errorCodePtr = xvfs_errorToErrno(length);

		return(-1);
	}









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		Tcl_QueueEvent((Tcl_Event *) event, TCL_QUEUE_TAIL);

		XVFS_DEBUG_LEAVE;
		return(0);
	}


	Tcl_Free((char *) channelInstanceData);

	XVFS_DEBUG_PUTS("... ok");

	XVFS_DEBUG_LEAVE;
	return(0);
}

static int xvfs_tclfs_readChannel(ClientData channelInstanceData_p, char *buf, int bufSize, int *errorCodePtr) {
	struct xvfs_tclfs_channel_id *channelInstanceData;
	const unsigned char *data;
	Tcl_WideInt offset, length;
	long inode;

	channelInstanceData = (struct xvfs_tclfs_channel_id *) channelInstanceData_p;

	/*
	 * If we are already at the end of the file we can skip
	 * attempting to read it
	 */
	if (channelInstanceData->eofMarked) {
		return(0);
	}

	inode = channelInstanceData->inode;
	offset = channelInstanceData->currentOffset;
	length = bufSize;

	data = channelInstanceData->fsInstanceInfo->fsInfo->getDataProc(NULL, inode, offset, &length);

	if (length < 0) {
		*errorCodePtr = xvfs_errorToErrno(length);

		return(-1);
	}
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	XVFS_DEBUG_PRINTF("Getting stat() on \"%s\" ...", Tcl_GetString(path));

	path = xvfs_absolutePath(path);

	pathStr = xvfs_relativePath(path, instanceInfo);

	retval = instanceInfo->fsInfo->getStatProc(pathStr, statBuf);
	if (retval < 0) {
		XVFS_DEBUG_PRINTF("... failed: %s", xvfs_strerror(retval));

		Tcl_SetErrno(xvfs_errorToErrno(retval));

		retval = -1;
	} else {








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	XVFS_DEBUG_PRINTF("Getting stat() on \"%s\" ...", Tcl_GetString(path));

	path = xvfs_absolutePath(path);

	pathStr = xvfs_relativePath(path, instanceInfo);

	retval = instanceInfo->fsInfo->getStatProc(pathStr, XVFS_INODE_NULL, statBuf);
	if (retval < 0) {
		XVFS_DEBUG_PRINTF("... failed: %s", xvfs_strerror(retval));

		Tcl_SetErrno(xvfs_errorToErrno(retval));

		retval = -1;
	} else {
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		Tcl_DecrRefCount(path);

		XVFS_DEBUG_LEAVE;
		return(-1);
	}

	statRetVal = instanceInfo->fsInfo->getStatProc(pathStr, &fileInfo);
	if (statRetVal < 0) {
		XVFS_DEBUG_PUTS("... no (not statable)");

		Tcl_DecrRefCount(path);

		XVFS_DEBUG_LEAVE;
		return(-1);








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		Tcl_DecrRefCount(path);

		XVFS_DEBUG_LEAVE;
		return(-1);
	}

	statRetVal = instanceInfo->fsInfo->getStatProc(pathStr, XVFS_INODE_NULL, &fileInfo);
	if (statRetVal < 0) {
		XVFS_DEBUG_PUTS("... no (not statable)");

		Tcl_DecrRefCount(path);

		XVFS_DEBUG_LEAVE;
		return(-1);
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		xvfs_setresults_error(interp, XVFS_RV_ERR_ENOENT);

		XVFS_DEBUG_LEAVE;
		return(TCL_OK);
	}

	childrenCount = 0;
	children = instanceInfo->fsInfo->getChildrenProc(pathStr, &childrenCount);
	if (childrenCount < 0) {
		XVFS_DEBUG_PRINTF("... error: %s", xvfs_strerror(childrenCount));

		Tcl_DecrRefCount(path);

		xvfs_setresults_error(interp, childrenCount);









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		xvfs_setresults_error(interp, XVFS_RV_ERR_ENOENT);

		XVFS_DEBUG_LEAVE;
		return(TCL_OK);
	}

	childrenCount = 0;
	children = instanceInfo->fsInfo->getChildrenProc(pathStr, XVFS_INODE_NULL, &childrenCount);
	if (childrenCount < 0) {
		XVFS_DEBUG_PRINTF("... error: %s", xvfs_strerror(childrenCount));

		Tcl_DecrRefCount(path);

		xvfs_setresults_error(interp, childrenCount);
︙︙

Modified xvfs-core.h from [8640d3027d] to [601afdbb27]. 

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#ifndef XVFS_CORE_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817
#define XVFS_CORE_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817 1

#include <tcl.h>

#define XVFS_PROTOCOL_VERSION 1

typedef const char **(*xvfs_proc_getChildren_t)(const char *path, Tcl_WideInt *count);
typedef const unsigned char *(*xvfs_proc_getData_t)(const char *path, Tcl_WideInt start, Tcl_WideInt *length);
typedef int (*xvfs_proc_getStat_t)(const char *path, Tcl_StatBuf *statBuf);

/*
 * Interface for the filesystem to fill out before registering.
 * The protocolVersion is provided first so that if this
 * needs to change over time it can be appropriately handled.
 */
struct Xvfs_FSInfo {








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#ifndef XVFS_CORE_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817
#define XVFS_CORE_H_1B4B28D60EBAA11D5FF85642FA7CA22C29E8E817 1

#include <tcl.h>

#define XVFS_PROTOCOL_VERSION 1

typedef const char **(*xvfs_proc_getChildren_t)(const char *path, long inode, Tcl_WideInt *count);
typedef const unsigned char *(*xvfs_proc_getData_t)(const char *path, long inode, Tcl_WideInt start, Tcl_WideInt *length);
typedef int (*xvfs_proc_getStat_t)(const char *path, long inode, Tcl_StatBuf *statBuf);

/*
 * Interface for the filesystem to fill out before registering.
 * The protocolVersion is provided first so that if this
 * needs to change over time it can be appropriately handled.
 */
struct Xvfs_FSInfo {
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#define XVFS_RV_ERR_EINVAL   (-8193)
#define XVFS_RV_ERR_EISDIR   (-8194)
#define XVFS_RV_ERR_ENOTDIR  (-8195)
#define XVFS_RV_ERR_EFAULT   (-8196)
#define XVFS_RV_ERR_EROFS    (-8197)
#define XVFS_RV_ERR_INTERNAL (-16383)








#define XVFS_REGISTER_INTERFACE(name) int name(Tcl_Interp *interp, struct Xvfs_FSInfo *fsInfo);

#if defined(XVFS_MODE_STANDALONE)
/*
 * In standalone mode, we just redefine calls to
 * Xvfs_Register() to go to the xvfs_standalone_register()
 * function








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#define XVFS_RV_ERR_EINVAL   (-8193)
#define XVFS_RV_ERR_EISDIR   (-8194)
#define XVFS_RV_ERR_ENOTDIR  (-8195)
#define XVFS_RV_ERR_EFAULT   (-8196)
#define XVFS_RV_ERR_EROFS    (-8197)
#define XVFS_RV_ERR_INTERNAL (-16383)

/*
 * Functions allow user to specify either a path or a inode.
 * If a path is specified, the inode must be specified as
 * XVFS_INODE_NULL.
 */
#define XVFS_INODE_NULL (-1)

#define XVFS_REGISTER_INTERFACE(name) int name(Tcl_Interp *interp, struct Xvfs_FSInfo *fsInfo);

#if defined(XVFS_MODE_STANDALONE)
/*
 * In standalone mode, we just redefine calls to
 * Xvfs_Register() to go to the xvfs_standalone_register()
 * function
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Modified xvfs-create-c.c from [56b4842ff2] to [3e031870d5].

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		fprintf(outfp, "static const struct xvfs_file_data xvfs_");
		fprintf(outfp, "%s", options->name);
		fprintf(outfp, "_data[] = {\n");
		parse_xvfs_minirivet_directory(outfp, xvfs_state, options->directory, "");
		fprintf(outfp, "};\n");
	} else if (strcmp(buffer_p, "[zlib adler32 $::xvfs::fsName 0]") == 0) {
		fprintf(outfp, "%lu", adler32(0, (unsigned char *) options->name, strlen(options->name)));


	} else if (strcmp(buffer_p, "$hashTableHeader") == 0) {
		parse_xvfs_minirivet_hashtable_header(outfp, xvfs_state);
	} else if (strcmp(buffer_p, "[dict get $hashTable body]") == 0) {
		parse_xvfs_minirivet_hashtable_body(outfp, xvfs_state);
	} else {
		fprintf(outfp, "@INVALID@%s@INVALID@", buffer_p);
	}








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		fprintf(outfp, "static const struct xvfs_file_data xvfs_");
		fprintf(outfp, "%s", options->name);
		fprintf(outfp, "_data[] = {\n");
		parse_xvfs_minirivet_directory(outfp, xvfs_state, options->directory, "");
		fprintf(outfp, "};\n");
	} else if (strcmp(buffer_p, "[zlib adler32 $::xvfs::fsName 0]") == 0) {
		fprintf(outfp, "%lu", adler32(0, (unsigned char *) options->name, strlen(options->name)));
	} else if (strcmp(buffer_p, "[llength $::xvfs::outputFiles]") == 0) {
		fprintf(outfp, "%lu", xvfs_state->child_count);
	} else if (strcmp(buffer_p, "$hashTableHeader") == 0) {
		parse_xvfs_minirivet_hashtable_header(outfp, xvfs_state);
	} else if (strcmp(buffer_p, "[dict get $hashTable body]") == 0) {
		parse_xvfs_minirivet_hashtable_body(outfp, xvfs_state);
	} else {
		fprintf(outfp, "@INVALID@%s@INVALID@", buffer_p);
	}
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