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Dir : /opt/redis-7/src/commands/
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Dir : //opt/redis-7/src/commands/bitpos.json

{
    "BITPOS": {
        "summary": "Finds the first set (1) or clear (0) bit in a string.",
        "complexity": "O(N)",
        "group": "bitmap",
        "since": "2.8.7",
        "arity": -3,
        "function": "bitposCommand",
        "history": [
            [
                "7.0.0",
                "Added the `BYTE|BIT` option."
            ]
        ],
        "command_flags": [
            "READONLY"
        ],
        "acl_categories": [
            "BITMAP"
        ],
        "key_specs": [
            {
                "flags": [
                    "RO",
                    "ACCESS"
                ],
                "begin_search": {
                    "index": {
                        "pos": 1
                    }
                },
                "find_keys": {
                    "range": {
                        "lastkey": 0,
                        "step": 1,
                        "limit": 0
                    }
                }
            }
        ],
        "arguments": [
            {
                "name": "key",
                "type": "key",
                "key_spec_index": 0
            },
            {
                "name": "bit",
                "type": "integer"
            },
            {
                "name": "range",
                "type": "block",
                "optional": true,
                "arguments": [
                    {
                        "name": "start",
                        "type": "integer"
                    },
                    {
                        "name": "end-unit-block",
                        "type": "block",
                        "optional": true,
                        "arguments": [
                            {
                                "name": "end",
                                "type": "integer"
                            },
                            {
                                "name": "unit",
                                "type": "oneof",
                                "optional": true,
                                "since": "7.0.0",
                                "arguments": [
                                    {
                                        "name": "byte",
                                        "type": "pure-token",
                                        "token": "BYTE"
                                    },
                                    {
                                        "name": "bit",
                                        "type": "pure-token",
                                        "token": "BIT"
                                    }
                                ]
                            }
                        ]
                    }
                ]
            }
        ],
        "reply_schema": {
            "oneOf": [
                {
                    "description": "the position of the first bit set to 1 or 0 according to the request",
                    "type": "integer",
                    "minimum": 0
                },
                {
                    "description": "In case the `bit` argument is 1 and the string is empty or composed of just zero bytes",
                    "const": -1
                }
            ]
        }
    }
}