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Add return code to get_block_hash_fn

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Alex Beregszaszi 2018-08-20 14:38:23 +01:00 committed by Paweł Bylica
parent 7a3f6bb57a
commit d9f7ff25f5
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GPG Key ID: 7A0C037434FE77EF
4 changed files with 25 additions and 13 deletions
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4
bindings/go/evmc/host.c
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@ -97,8 +97,8 @@ static inline void go_exported_functions_type_checks()
tx_context = getTxContext(context);
evmc_get_block_hash_fn get_block_hash_fn = NULL;
get_block_hash_fn(uint256be, context, number);
getBlockHash(uint256be, context, number);
status = get_block_hash_fn(uint256be, context, number);
status = getBlockHash(uint256be, context, number);
evmc_emit_log_fn emit_log_fn = NULL;
emit_log_fn(context, address, data, size, uint256be, size);

13
bindings/go/evmc/host.go
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@ -182,11 +182,20 @@ func getTxContext(pCtx unsafe.Pointer) C.struct_evmc_tx_context {
}
//export getBlockHash
func getBlockHash(pResult *C.struct_evmc_uint256be, pCtx unsafe.Pointer, number int64) {
func getBlockHash(pResult *C.struct_evmc_uint256be, pCtx unsafe.Pointer, number int64) C.int {
idx := int((*C.struct_extended_context)(pCtx).index)
ctx := getHostContext(idx)
*pResult = evmcUint256be(ctx.GetBlockHash(number))
blockhash := ctx.GetBlockHash(number)
// FIXME: should we instead adjust `ctx.GetBlockHash`?
if blockhash == (common.Hash{}) {
// All zeroes hash is considered a failure in lookup.
return C.int(0)
}
*pResult = evmcUint256be(blockhash)
return C.int(1)
}
//export emitLog

3
examples/example_host.cpp
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@ -107,11 +107,12 @@ static evmc_tx_context get_tx_context(evmc_context* context)
return result;
}
static void get_block_hash(evmc_uint256be* result, evmc_context* context, int64_t number)
static int get_block_hash(evmc_uint256be* result, evmc_context* context, int64_t number)
{
(void)result;
(void)context;
(void)number;
return 0;
}
static void emit_log(evmc_context* context,

18
include/evmc/evmc.h
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@ -153,17 +153,19 @@ typedef struct evmc_tx_context (*evmc_get_tx_context_fn)(struct evmc_context* co
/**
* Get block hash callback function.
*
* This callback function is used by an EVM to query the block hash of
* a given block.
* This callback function is used by an VM to query the block hash of
* a given block. If the requested block is not found, then an appropriate
* result code is returned.
*
* @param[out] result The returned block hash value.
* @param[out] result The returned block hash value. Only written to
* if the return value is 1 (information is avialable).
* @param context The pointer to the Host execution context.
* @param number The block number. Must be a value between
* (and including) 0 and 255.
* @param number The block number.
* @return 1 if the information is available, 0 otherwise.
*/
typedef void (*evmc_get_block_hash_fn)(struct evmc_uint256be* result,
struct evmc_context* context,
int64_t number);
typedef int (*evmc_get_block_hash_fn)(struct evmc_uint256be* result,
struct evmc_context* context,
int64_t number);
/**
* The execution status code.