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89 lines
2.5 KiB
89 lines
2.5 KiB
/*
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This file is part of ethash.
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ethash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ethash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ethash. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file io.c
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* @author Lefteris Karapetsas <lefteris@ethdev.com>
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* @date 2015
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*/
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#include "io.h"
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#include <string.h>
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#include <stdio.h>
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// silly macro to save some typing
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#define PASS_ARR(c_) (c_), sizeof(c_)
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static bool ethash_io_write_file(char const *dirname,
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char const* filename,
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size_t filename_length,
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void const* data,
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size_t data_size)
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{
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bool ret = false;
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char *fullname = ethash_io_create_filename(dirname, filename, filename_length);
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if (!fullname) {
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return false;
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}
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FILE *f = fopen(fullname, "wb");
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if (!f) {
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goto free_name;
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}
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if (data_size != fwrite(data, 1, data_size, f)) {
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goto close;
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}
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ret = true;
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close:
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fclose(f);
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free_name:
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free(fullname);
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return ret;
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}
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bool ethash_io_write(char const *dirname,
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ethash_params const* params,
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ethash_blockhash_t seedhash,
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void const* cache,
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uint8_t **data,
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size_t *data_size)
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{
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char info_buffer[DAG_MEMO_BYTESIZE];
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// allocate the bytes
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uint8_t *temp_data_ptr = malloc(params->full_size);
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if (!temp_data_ptr) {
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goto end;
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}
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ethash_compute_full_data(temp_data_ptr, params, cache);
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if (!ethash_io_write_file(dirname, PASS_ARR(DAG_FILE_NAME), temp_data_ptr, params->full_size)) {
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goto fail_free;
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}
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ethash_io_serialize_info(ETHASH_REVISION, seedhash, info_buffer);
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if (!ethash_io_write_file(dirname, PASS_ARR(DAG_MEMO_NAME), info_buffer, DAG_MEMO_BYTESIZE)) {
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goto fail_free;
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}
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*data = temp_data_ptr;
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*data_size = params->full_size;
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return true;
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fail_free:
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free(temp_data_ptr);
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end:
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return false;
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}
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#undef PASS_ARR
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