io.c File Reference

#include "io.h"
#include <string.h>
#include <stdio.h>
#include <errno.h>

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Functions
enum ethash_io_rc	ethash_io_prepare (char const *dirname, ethash_h256_t const seedhash, FILE **output_file, uint64_t file_size, bool force_create)
	Prepares io for ethash. More...

Detailed Description

Author

Lefteris Karapetsas lefte.nosp@m.ris@.nosp@m.ethde.nosp@m.v.co.nosp@m.m

Date

2015

Definition in file io.c.

Function Documentation

enum ethash_io_rc ethash_io_prepare	(	char const *	dirname,
		ethash_h256_t const	seedhash,
		FILE **	output_file,
		uint64_t	file_size,
		bool	force_create
	)

Prepares io for ethash.

Create the DAG directory and the DAG file if they don't exist.

Parameters

[in]	dirname	A null terminated c-string of the path of the ethash data directory. If it does not exist it's created.
[in]	seedhash	The seedhash of the current block number, used in the naming of the file as can be seen from the spec at: https://github.com/ethereum/wiki/wiki/Ethash-DAG
[out]	output_file	If there was no failure then this will point to an open file descriptor. User is responsible for closing it. In the case of memo match then the file is open on read mode, while on the case of mismatch a new file is created on write mode
[in]	file_size	The size that the DAG file should have on disk
[out]	force_create	If true then there is no check to see if the file already exists

Returns

For possible return values

See also

enum ethash_io_rc

Definition at line 26 of file io.c.

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