forked from github/server
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
#include <platform.h>
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#include "gamedata.h"
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#include "log.h"
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#include <storage.h>
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#include <filestream.h>
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#include <memstream.h>
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#include <binarystore.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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void gamedata_done(gamedata *data) {
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binstore_done(data->store);
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}
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void gamedata_init(gamedata *data, storage *store, int version) {
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data->version = version;
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data->store = store;
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binstore_init(data->store, &data->strm);
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}
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int gamedata_openfile(gamedata *data, const char *filename, const char *mode, int version) {
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FILE *F = fopen(filename, mode);
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if (F) {
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int err = 0;
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if (strchr(mode, 'r')) {
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size_t sz;
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sz = fread(&version, 1, sizeof(int), F);
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if (sz != sizeof(int)) {
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err = ferror(F);
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}
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else {
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err = fseek(F, sizeof(int), SEEK_CUR);
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}
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}
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else if (strchr(mode, 'w')) {
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int n = STREAM_VERSION;
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fwrite(&version, sizeof(int), 1, F);
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fwrite(&n, sizeof(int), 1, F);
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}
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if (err) {
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log_error("could not open %s: %s", filename, strerror(errno));
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fclose(F);
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}
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else {
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storage *store = malloc(sizeof(storage));
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fstream_init(&data->strm, F);
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gamedata_init(data, store, version);
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}
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return err;
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}
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return errno;
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}
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gamedata *gamedata_open(const char *filename, const char *mode, int version) {
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gamedata *data = (gamedata *)calloc(1, sizeof(gamedata));
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if (gamedata_openfile(data, filename, mode, version) != 0) {
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free(data);
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return NULL;
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}
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return data;
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}
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void gamedata_close(gamedata *data) {
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gamedata_done(data);
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fstream_done(&data->strm);
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free(data->store);
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}
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