rdff.c File Reference

#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "rdff.h"

Go to the source code of this file.

Classes
struct	_RDFF

Macros
#define	CHUNK_ID_LEN   4
#define	WRITE(ptr, size, nmemb, stream)
#define	READ(ptr, size, nmemb, stream)

Functions
RDFF	rdff_open (const char *path, bool write)
RDFFStatus	rdff_write_uri (RDFF file, uint32_t id, uint32_t len, const char *uri)
RDFFStatus	rdff_write_triple (RDFF file, uint32_t subject, uint32_t predicate, uint32_t object_type, uint32_t object_size, const void *object)
RDFFStatus	rdff_read_chunk (RDFF file, RDFFChunk **buf)
bool	rdff_chunk_is_uri (RDFFChunk *chunk)
bool	rdff_chunk_is_triple (RDFFChunk *chunk)
void	rdff_close (RDFF file)

Variables
static const char	FILE_TYPE [CHUNK_ID_LEN] = "RDFF"
static const char	CHUNK_TRIP [CHUNK_ID_LEN] = "trip"
static const char	CHUNK_URID [CHUNK_ID_LEN] = "urid"

Macro Definition Documentation

#define CHUNK_ID_LEN   4

Definition at line 26 of file rdff.c.

#define READ	(		ptr,
			size,
			nmemb,
			stream
	)

Value:

if (fread(ptr, size, nmemb, stream) != nmemb) { \
                return RDFF_STATUS_CORRUPT; \
        }

#define WRITE	(		ptr,
			size,
			nmemb,
			stream
	)

Value:

if (fwrite(ptr, size, nmemb, stream) != nmemb) { \
                return RDFF_STATUS_UNKNOWN_ERROR; \
        }

Definition at line 84 of file rdff.c.

Function Documentation

bool rdff_chunk_is_triple

(

RDFFChunk *

chunk

)

Return true iff chunk is a Triple chunk.

Definition at line 165 of file rdff.c.

bool rdff_chunk_is_uri

(

RDFFChunk *

chunk

)

Return true iff chunk is a URI chunk.

Definition at line 158 of file rdff.c.

void rdff_close

(

RDFF

file

)

Close file. After this call, file is invalid.

Definition at line 171 of file rdff.c.

RDFF rdff_open	(	const char *	path,
		bool	write
	)

Open/Create a new RDFF file.

Definition at line 39 of file rdff.c.

RDFFStatus rdff_read_chunk	(	RDFF	file,
		RDFFChunk **	buf
	)

Read a chunk from file.

Parameters

buf	MUST point to an RDFFChunk dynamically allocated with malloc. The size field (i.e. (*buf)->size) MUST be set to the amount of available memory in the chunk (not including the header). If this is insufficient, buf will be resized using realloc.

Definition at line 131 of file rdff.c.

RDFFStatus rdff_write_triple	(	RDFF	file,
		uint32_t	subject,
		uint32_t	predicate,
		uint32_t	object_type,
		uint32_t	object_size,
		const void *	object
	)

Write a key/value record to file.

Definition at line 108 of file rdff.c.

RDFFStatus rdff_write_uri	(	RDFF	file,
		uint32_t	id,
		uint32_t	len,
		const char *	uri
	)

Write a URI ID to file.

Definition at line 90 of file rdff.c.

Variable Documentation

const char CHUNK_TRIP[CHUNK_ID_LEN] = "trip"

static

Definition at line 29 of file rdff.c.

const char CHUNK_URID[CHUNK_ID_LEN] = "urid"

static

Definition at line 30 of file rdff.c.

const char FILE_TYPE[CHUNK_ID_LEN] = "RDFF"

static

Definition at line 28 of file rdff.c.