Remove unused RDF in RIFF prototype
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A090BCE02CF57F04
@ -1,260 +0,0 @@
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/*
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RDFF - RDF in RIFF
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Copyright 2011 David Robillard <http://drobilla.net>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "rdff.h"
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#define CHUNK_ID_LEN 4
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static const char FILE_TYPE[CHUNK_ID_LEN] = "RDFF"; /* RDFF File ID */
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static const char CHUNK_TRIP[CHUNK_ID_LEN] = "trip"; /* Triple Chunk ID */
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static const char CHUNK_URID[CHUNK_ID_LEN] = "urid"; /* URI-ID Chunk ID*/
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struct _RDFF {
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FILE* fd;
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uint32_t size;
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bool write;
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};
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RDFF
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rdff_open(const char* path, bool write)
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{
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FILE* fd = fopen(path, (write ? "w" : "r"));
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if (!fd) {
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fprintf(stderr, "%s\n", strerror(errno));
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return NULL;
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}
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uint32_t size = 0;
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if (write) {
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fwrite("RIFF", CHUNK_ID_LEN, 1, fd); /* RIFF chunk ID */
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fwrite(&size, sizeof(size), 1, fd); /* RIFF chunk size */
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fwrite(FILE_TYPE, CHUNK_ID_LEN, 1, fd); /* File type */
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} else {
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char magic[CHUNK_ID_LEN];
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if (fread(magic, CHUNK_ID_LEN, 1, fd) != 1
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|| strncmp(magic, "RIFF", CHUNK_ID_LEN)) {
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fclose(fd);
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fprintf(stderr, "%s: error: not a RIFF file\n", path);
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return NULL;
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}
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if (fread(&size, sizeof(size), 1, fd) != 1) {
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fclose(fd);
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fprintf(stderr, "%s: error: missing RIFF chunk size\n", path);
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return NULL;
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}
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if (fread(magic, CHUNK_ID_LEN, 1, fd) != 1
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|| strncmp(magic, FILE_TYPE, CHUNK_ID_LEN)) {
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fclose(fd);
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fprintf(stderr, "%s: error: not an %s RIFF file\n",
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FILE_TYPE, path);
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return NULL;
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}
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}
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RDFF ret = (RDFF)malloc(sizeof(struct _RDFF));
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ret->fd = fd;
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ret->size = size;
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ret->write = write;
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return ret;
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}
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#define WRITE(ptr, size, nmemb, stream) \
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if (fwrite(ptr, size, nmemb, stream) != nmemb) { \
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return RDFF_STATUS_UNKNOWN_ERROR; \
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}
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RDFFStatus
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rdff_write_uri(RDFF file,
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uint32_t id,
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uint32_t len,
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const char* uri)
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{
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const uint32_t chunk_size = sizeof(id) + len + 1;
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WRITE(CHUNK_URID, CHUNK_ID_LEN, 1, file->fd);
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WRITE(&chunk_size, sizeof(chunk_size), 1, file->fd);
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WRITE(&id, sizeof(id), 1, file->fd);
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WRITE(uri, len + 1, 1, file->fd);
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if ((chunk_size % 2)) {
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WRITE("", 1, 1, file->fd); /* pad */
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}
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file->size += 8 + chunk_size;
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return RDFF_STATUS_OK;
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}
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RDFFStatus
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rdff_write_triple(RDFF file,
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uint32_t subject,
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uint32_t predicate,
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uint32_t object_type,
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uint32_t object_size,
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const void* object)
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{
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const uint32_t chunk_size = sizeof(RDFFTripleChunk) + object_size;
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WRITE(CHUNK_TRIP, CHUNK_ID_LEN, 1, file->fd);
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WRITE(&chunk_size, sizeof(chunk_size), 1, file->fd);
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WRITE(&subject, sizeof(subject), 1, file->fd);
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WRITE(&predicate, sizeof(predicate), 1, file->fd);
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WRITE(&object_type, sizeof(object_type), 1, file->fd);
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WRITE(&object_size, sizeof(object_size), 1, file->fd);
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WRITE(object, object_size, 1, file->fd);
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if ((object_size % 2)) {
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WRITE("", 1, 1, file->fd); /* write pad */
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}
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file->size += 8 + chunk_size;
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return RDFF_STATUS_OK;
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}
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RDFFStatus
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rdff_read_chunk(RDFF file,
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RDFFChunk** buf)
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{
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if (feof(file->fd))
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return RDFF_STATUS_EOF;
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#define READ(ptr, size, nmemb, stream) \
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if (fread(ptr, size, nmemb, stream) != nmemb) { \
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return RDFF_STATUS_CORRUPT; \
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}
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const uint32_t alloc_size = (*buf)->size;
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READ((*buf)->type, sizeof((*buf)->type), 1, file->fd);
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READ(&(*buf)->size, sizeof((*buf)->size), 1, file->fd);
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if ((*buf)->size > alloc_size) {
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*buf = realloc(*buf, sizeof(RDFFChunk) + (*buf)->size);
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}
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READ((*buf)->data, (*buf)->size, 1, file->fd);
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if (((*buf)->size % 2)) {
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char pad;
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READ(&pad, 1, 1, file->fd); /* skip pad */
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}
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return RDFF_STATUS_OK;
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}
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bool
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rdff_chunk_is_uri(RDFFChunk* chunk)
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{
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return !strncmp(chunk->type, CHUNK_URID, CHUNK_ID_LEN);
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}
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bool
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rdff_chunk_is_triple(RDFFChunk* chunk)
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{
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return !strncmp(chunk->type, CHUNK_TRIP, CHUNK_ID_LEN);
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}
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void
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rdff_close(RDFF file)
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{
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if (file) {
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if (file->write) {
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fseek(file->fd, 4, SEEK_SET);
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if (fwrite(&file->size, sizeof(file->size), 1, file->fd) != 1) {
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fprintf(stderr, "failed to write RIFF header size\n");
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}
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}
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fclose(file->fd);
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}
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free(file);
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}
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#ifdef STANDALONE
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// Test program
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int
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main(int argc, char** argv)
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{
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if (argc != 2) {
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fprintf(stderr, "Usage: %s FILENAME\n", argv[0]);
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return 1;
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}
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const char* const filename = argv[1];
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RDFF file = rdff_open(filename, true);
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if (!file)
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goto fail;
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static const int N_URIS = 16;
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static const int N_RECORDS = 16;
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char uri[64];
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for (int i = 0; i < N_URIS; ++i) {
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snprintf(uri, sizeof(uri), "http://example.org/uri%02d", i + 1);
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rdff_write_uri(file, i + 1, strlen(uri), uri);
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}
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char val[6];
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for (int i = 0; i < N_RECORDS; ++i) {
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snprintf(val, sizeof(val), "VAL%02d", i);
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rdff_write_triple(file,
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0,
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rand() % N_URIS,
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0,
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sizeof(val),
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val);
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}
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rdff_close(file);
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file = rdff_open(filename, false);
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if (!file)
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goto fail;
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RDFFChunk* chunk = malloc(sizeof(RDFFChunk));
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chunk->size = 0;
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for (int i = 0; i < N_URIS; ++i) {
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if (rdff_read_chunk(file, &chunk)
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|| strncmp(chunk->type, CHUNK_URID, 4)) {
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fprintf(stderr, "error: expected %s chunk\n", CHUNK_URID);
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goto fail;
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}
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RDFFURIChunk* body = (RDFFURIChunk*)chunk->data;
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printf("URI: %s\n", body->uri);
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}
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for (int i = 0; i < N_RECORDS; ++i) {
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if (rdff_read_chunk(file, &chunk)
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|| strncmp(chunk->type, CHUNK_TRIP, 4)) {
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fprintf(stderr, "error: expected %s chunk\n", CHUNK_TRIP);
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goto fail;
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}
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RDFFTripleChunk* body = (RDFFTripleChunk*)chunk->data;
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printf("KEY %d = %s\n", body->predicate, body->object);
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}
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free(chunk);
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rdff_close(file);
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return 0;
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fail:
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rdff_close(file);
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fprintf(stderr, "Test failed\n");
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return 1;
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}
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#endif // STANDALONE
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@ -1,138 +0,0 @@
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/*
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RDFF - RDF in RIFF
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Copyright 2011 David Robillard <http://drobilla.net>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef RDFF_RDFF_H
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#define RDFF_RDFF_H
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#include <stdbool.h>
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#include <stdint.h>
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#ifdef __GNUC__
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# define PACKED __attribute__((__packed__))
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#else
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# define PACKED
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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RDFF file or stream.
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*/
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typedef struct _RDFF* RDFF;
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/**
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Status codes for function returns.
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*/
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typedef enum {
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RDFF_STATUS_OK = 0, /**< Success. */
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RDFF_STATUS_UNKNOWN_ERROR = 1, /**< Unknown error. */
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RDFF_STATUS_EOF = 2, /**< End of file. */
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RDFF_STATUS_CORRUPT = 3 /**< Corrupt data. */
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} RDFFStatus;
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/**
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Generic RIFF chunk header.
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*/
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typedef struct {
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char type[4]; /**< Chunk type ID. */
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uint32_t size; /**< Size of chunk body (not including header). */
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char data[]; /**< Chunk body. */
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} PACKED RDFFChunk;
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/**
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Body of a RDFF "urid" chunk.
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*/
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typedef struct {
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uint32_t id; /**< Numeric ID of URI in this RDFF. */
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char uri[]; /**< URI string. */
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} PACKED RDFFURIChunk;
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/**
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Body of a RDFF "trip" chunk.
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*/
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typedef struct {
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uint32_t subject; /**< Subject URI ID. */
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uint32_t predicate; /**< Predicate URI ID. */
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uint32_t object_type; /**< Object type URI ID. */
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uint32_t object_size; /**< Size of object data. */
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char object[]; /**< Object data. */
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} PACKED RDFFTripleChunk;
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/**
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Open/Create a new RDFF file.
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*/
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RDFF
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rdff_open(const char* path, bool write);
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/**
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Write a URI ID to @a file.
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*/
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RDFFStatus
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rdff_write_uri(RDFF file,
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uint32_t id,
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uint32_t len,
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const char* uri);
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/**
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Write a key/value record to @a file.
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*/
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RDFFStatus
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rdff_write_triple(RDFF file,
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uint32_t subject,
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uint32_t predicate,
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uint32_t object_type,
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uint32_t object_size,
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const void* object);
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/**
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Read a chunk from @a file.
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@param buf MUST point to an RDFFChunk dynamically allocated with malloc.
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The @a size field (i.e. (*buf)->size) MUST be set to the amount of available
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memory in the chunk (not including the header). If this is insufficient,
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*buf will be resized using realloc.
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*/
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RDFFStatus
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rdff_read_chunk(RDFF file,
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RDFFChunk** buf);
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/**
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Return true iff @a chunk is a URI chunk.
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*/
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bool
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rdff_chunk_is_uri(RDFFChunk* chunk);
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/**
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Return true iff @a chunk is a Triple chunk.
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*/
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bool
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rdff_chunk_is_triple(RDFFChunk* chunk);
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/**
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Close @a file.
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After this call, @a file is invalid.
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*/
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void
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rdff_close(RDFF file);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* RDFF_RDFF_H */
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