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Diffstat (limited to 'vendor/github.com/ethereum/ethash/src/libethash/internal.h')
| -rw-r--r-- | vendor/github.com/ethereum/ethash/src/libethash/internal.h | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/vendor/github.com/ethereum/ethash/src/libethash/internal.h b/vendor/github.com/ethereum/ethash/src/libethash/internal.h new file mode 100644 index 000000000..26c395ad6 --- /dev/null +++ b/vendor/github.com/ethereum/ethash/src/libethash/internal.h @@ -0,0 +1,179 @@ +#pragma once +#include "compiler.h" +#include "endian.h" +#include "ethash.h" +#include <stdio.h> + +#define ENABLE_SSE 0 + +#if defined(_M_X64) && ENABLE_SSE +#include <smmintrin.h> +#endif + +#ifdef __cplusplus +extern "C" { +#endif + +// compile time settings +#define NODE_WORDS (64/4) +#define MIX_WORDS (ETHASH_MIX_BYTES/4) +#define MIX_NODES (MIX_WORDS / NODE_WORDS) +#include <stdint.h> + +typedef union node { + uint8_t bytes[NODE_WORDS * 4]; + uint32_t words[NODE_WORDS]; + uint64_t double_words[NODE_WORDS / 2]; + +#if defined(_M_X64) && ENABLE_SSE + __m128i xmm[NODE_WORDS/4]; +#endif + +} node; + +static inline uint8_t ethash_h256_get(ethash_h256_t const* hash, unsigned int i) +{ + return hash->b[i]; +} + +static inline void ethash_h256_set(ethash_h256_t* hash, unsigned int i, uint8_t v) +{ + hash->b[i] = v; +} + +static inline void ethash_h256_reset(ethash_h256_t* hash) +{ + memset(hash, 0, 32); +} + +// Returns if hash is less than or equal to boundary (2^256/difficulty) +static inline bool ethash_check_difficulty( + ethash_h256_t const* hash, + ethash_h256_t const* boundary +) +{ + // Boundary is big endian + for (int i = 0; i < 32; i++) { + if (ethash_h256_get(hash, i) == ethash_h256_get(boundary, i)) { + continue; + } + return ethash_h256_get(hash, i) < ethash_h256_get(boundary, i); + } + return true; +} + +/** + * Difficulty quick check for POW preverification + * + * @param header_hash The hash of the header + * @param nonce The block's nonce + * @param mix_hash The mix digest hash + * @param boundary The boundary is defined as (2^256 / difficulty) + * @return true for succesful pre-verification and false otherwise + */ +bool ethash_quick_check_difficulty( + ethash_h256_t const* header_hash, + uint64_t const nonce, + ethash_h256_t const* mix_hash, + ethash_h256_t const* boundary +); + +struct ethash_light { + void* cache; + uint64_t cache_size; + uint64_t block_number; +}; + +/** + * Allocate and initialize a new ethash_light handler. Internal version + * + * @param cache_size The size of the cache in bytes + * @param seed Block seedhash to be used during the computation of the + * cache nodes + * @return Newly allocated ethash_light handler or NULL in case of + * ERRNOMEM or invalid parameters used for @ref ethash_compute_cache_nodes() + */ +ethash_light_t ethash_light_new_internal(uint64_t cache_size, ethash_h256_t const* seed); + +/** + * Calculate the light client data. Internal version. + * + * @param light The light client handler + * @param full_size The size of the full data in bytes. + * @param header_hash The header hash to pack into the mix + * @param nonce The nonce to pack into the mix + * @return The resulting hash. + */ +ethash_return_value_t ethash_light_compute_internal( + ethash_light_t light, + uint64_t full_size, + ethash_h256_t const header_hash, + uint64_t nonce +); + +struct ethash_full { + FILE* file; + uint64_t file_size; + node* data; +}; + +/** + * Allocate and initialize a new ethash_full handler. Internal version. + * + * @param dirname The directory in which to put the DAG file. + * @param seedhash The seed hash of the block. Used in the DAG file naming. + * @param full_size The size of the full data in bytes. + * @param cache A cache object to use that was allocated with @ref ethash_cache_new(). + * Iff this function succeeds the ethash_full_t will take memory + * memory ownership of the cache and free it at deletion. If + * not then the user still has to handle freeing of the cache himself. + * @param callback A callback function with signature of @ref ethash_callback_t + * It accepts an unsigned with which a progress of DAG calculation + * can be displayed. If all goes well the callback should return 0. + * If a non-zero value is returned then DAG generation will stop. + * @return Newly allocated ethash_full handler or NULL in case of + * ERRNOMEM or invalid parameters used for @ref ethash_compute_full_data() + */ +ethash_full_t ethash_full_new_internal( + char const* dirname, + ethash_h256_t const seed_hash, + uint64_t full_size, + ethash_light_t const light, + ethash_callback_t callback +); + +void ethash_calculate_dag_item( + node* const ret, + uint32_t node_index, + ethash_light_t const cache +); + +void ethash_quick_hash( + ethash_h256_t* return_hash, + ethash_h256_t const* header_hash, + const uint64_t nonce, + ethash_h256_t const* mix_hash +); + +uint64_t ethash_get_datasize(uint64_t const block_number); +uint64_t ethash_get_cachesize(uint64_t const block_number); + +/** + * Compute the memory data for a full node's memory + * + * @param mem A pointer to an ethash full's memory + * @param full_size The size of the full data in bytes + * @param cache A cache object to use in the calculation + * @param callback The callback function. Check @ref ethash_full_new() for details. + * @return true if all went fine and false for invalid parameters + */ +bool ethash_compute_full_data( + void* mem, + uint64_t full_size, + ethash_light_t const light, + ethash_callback_t callback +); + +#ifdef __cplusplus +} +#endif |