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Code Issues Releases Wiki Activity

Change hash method

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This commit is contained in:
Daniel Vikstrom
2025-06-02 08:31:06 +02:00
parent 3d4a75148d
commit f4a9221232
2 changed files with 12 additions and 3 deletions
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11
esphome/core/config.py
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@@ -340,6 +340,15 @@ async def _add_automations(config):
await automation.build_automation(trigger, [], conf)
def fnv1a_32bit_hash(string: str) -> int:
"""FNV-1a 32-bit hash function."""
hash_value = 2166136261
for char in string:
hash_value ^= ord(char)
hash_value = (hash_value * 16777619) & 0xFFFFFFFF
return hash_value
@coroutine_with_priority(100.0)
async def to_code(config):
cg.add_global(cg.global_ns.namespace("esphome").using)
@@ -420,7 +429,7 @@ async def to_code(config):
if config[CONF_SUB_DEVICES]:
for dev_conf in config[CONF_SUB_DEVICES]:
dev = cg.new_Pvariable(dev_conf[CONF_ID])
cg.add(dev.set_uid(hash(str(dev_conf[CONF_ID])) % 0xFFFFFFFF))
cg.add(dev.set_uid(fnv1a_32bit_hash(str(dev_conf[CONF_ID]))))
cg.add(dev.set_name(dev_conf[CONF_NAME]))
cg.add(dev.set_area(dev_conf[CONF_AREA]))
cg.add(cg.App.register_sub_device(dev))

4
esphome/cpp_helpers.py
View File

@@ -13,7 +13,7 @@ from esphome.const import (
CONF_UPDATE_INTERVAL,
KEY_PAST_SAFE_MODE,
)
from esphome.core import CORE, ID, coroutine
from esphome.core import CORE, ID, coroutine, fnv1a_32bit_hash
from esphome.coroutine import FakeAwaitable
from esphome.cpp_generator import add, get_variable
from esphome.cpp_types import App
@@ -113,7 +113,7 @@ async def setup_entity(var, config):
add(var.set_entity_category(config[CONF_ENTITY_CATEGORY]))
if CONF_DEVICE_ID in config:
device = await get_variable(config[CONF_DEVICE_ID])
add(var.set_device_uid(hash(str(device)) % 0xFFFFFFFF))
add(var.set_device_uid(fnv1a_32bit_hash(str(device))))
def extract_registry_entry_config(