static int editor_db_read (void) {
char buffer[1024];
int size = 0;
editor_db_section *section;
int error = 0;
int signature;
int res;
res = roadmap_file_read (EditorDataFile, &signature, sizeof (int));
if (res != sizeof (int) || signature != DB_SIGNATURE) return -1;
while (1) {
char *head = buffer;
int count;
int item_id;
int align;
res = roadmap_file_read (EditorDataFile, buffer + size,
sizeof(buffer) - size);
if (res <= 0) return error;
size += res;
while ((count = editor_db_read_items(&head, size - (head - buffer),
§ion, &item_id, &error)) >= 0) {
int i;
for (i=0; i<count; i++) {
if (item_id != -1) {
/* Update */
void *data = editor_db_get_record(section, item_id);
assert(data);
if (section->flag_committed) {
editor_db_update_generation (section, ((editor_record_header *)data)->generation);
}
memcpy(data, head, section->record_size);
} else {
/* Add */
if (editor_db_add_record(section, head, head + section->item_offset, 0) == -1) return -1;
if (section->flag_committed) {
editor_db_update_generation (section, ((editor_record_header *)head)->generation);
}
}
head += section->record_size;
}
align = (count * section->record_size) % EDITOR_DB_ALIGN;
if (align) head += EDITOR_DB_ALIGN - align;
}
if (error) break;
size -= (head - buffer);
if (size > 0) memmove(buffer, head, size);
}
return error;
}
static int load_index(int fips, void **base, size_t *size) {
const char *map_path = roadmap_db_map_path ();
char name[30];
char filename[512];
const char *suffix = "index";
snprintf (name, sizeof (name), "%05d_%s%s", fips, suffix,
ROADMAP_DATA_TYPE);
roadmap_path_format (filename, sizeof (filename), map_path, name);
roadmap_log(ROADMAP_DEBUG,"index filename: %s", filename);
RoadMapFile file = roadmap_file_open (filename, "r");
if (!ROADMAP_FILE_IS_VALID(file)) {
return -1;
}
*size = favail(file);
*base = malloc (*size);
int res = roadmap_file_read (file, *base, *size);
roadmap_file_close (file);
if (res != (int)*size) {
free (*base);
return -1;
}
return 0;
}
int roadmap_io_read (RoadMapIO *io, void *data, int size) {
switch (io->subsystem) {
case ROADMAP_IO_FILE:
return roadmap_file_read (io->os.file, data, size);
case ROADMAP_IO_NET:
return roadmap_net_receive (io->os.socket, data, size);
case ROADMAP_IO_PIPE:
return roadmap_spawn_read_pipe (io->os.pipe, data, size);
case ROADMAP_IO_NULL:
return 0; /* Cannot receive anything from there. */
}
return -1;
}
