29 lines
762 B
Go
29 lines
762 B
Go
// +build !appengine
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package maxminddb
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import (
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"reflect"
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"unsafe"
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)
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// decodeStructKey returns a string which points into the database. Don't keep
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// it around.
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func (d *decoder) decodeStructKey(offset uint) (string, uint, error) {
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typeNum, size, newOffset := d.decodeCtrlData(offset)
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switch typeNum {
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case _Pointer:
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pointer, ptrOffset := d.decodePointer(size, newOffset)
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s, _, err := d.decodeStructKey(pointer)
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return s, ptrOffset, err
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case _String:
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var s string
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val := (*reflect.StringHeader)(unsafe.Pointer(&s))
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val.Data = uintptr(unsafe.Pointer(&d.buffer[newOffset]))
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val.Len = int(size)
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return s, newOffset + size, nil
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default:
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return "", 0, newInvalidDatabaseError("unexpected type when decoding struct key: %v", typeNum)
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}
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}
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