CFFI User Manual - Common Lisp.net

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Chapter 6: Foreign Types 36 defctype Syntax defctype name base-type &optional documentation Arguments and Values name base-type The name of the new foreign type. A symbol or a list defining the new type. documentation A documentation string, currently ignored. [Macro] Description The defctype macro provides a mechanism similar to C’s typedef to define new types. The new type inherits base-type’s translators, if any. There is no way to define translations for types defined with defctype. For that, you should use [define-foreign-type], page 38. Examples (defctype my-string :string "My own string type.") (defctype long-bools (:boolean :long) "Booleans that map to C longs.") See Also [define-foreign-type], page 38
Chapter 6: Foreign Types 37 defcenum Syntax defcenum name-and-options &body enum-list [Macro] enum-list ::= [docstring] { keyword | (keyword value) }* name-and-options ::= name | (name &optional (base-type :int)) Arguments and Values name docstring base-type keyword value Description The name of the new enum type. A documentation string, ignored. A symbol denoting a foreign type. A keyword symbol. An index value for a keyword. The defcenum macro is used to define foreign types that map keyword symbols to integer values, similar to the C enum type. If value is omitted its value will either be 0, if it’s the first entry, or it it will continue the progression from the last specified value. Keywords will be automatically converted to values and vice-versa when being passed as arguments to or returned from foreign functions, respectively. The same applies to any other situations where an object of an enum type is expected. Types defined with defcenum canonicalize to base-type which is :int by default. Examples (defcenum boolean :no :yes) <strong>CFFI</strong>> (foreign-enum-value ’boolean :no) ⇒ 0 (defcenum numbers (:one 1) :two (:four 4)) <strong>CFFI</strong>> (foreign-enum-keyword ’numbers 2) ⇒ :TWO See Also [foreign-enum-value], page 43 [foreign-enum-keyword], page 42
Page 1 and 2: CFFI User Manual
Page 3 and 4: i Table of Contents 1 Introduction.
Page 5 and 6: Chapter 1: Introduction 1 1 Introdu
Page 7 and 8: Chapter 3: Implementation Support 3
Page 9 and 10: Chapter 4: An Introduction to Forei
Page 25 and 26: Chapter 5: Wrapper generators 21 5
Page 27 and 28: Chapter 6: Foreign Types 23 :int64
Page 29 and 30: Chapter 6: Foreign Types 25 (define
Page 31 and 32: Chapter 6: Foreign Types 27 (defmet
Page 33 and 34: Chapter 6: Foreign Types 29 convert
Page 35 and 36: Chapter 6: Foreign Types 31 defbitf
Page 37 and 38: Chapter 6: Foreign Types 33 defcstr
Page 39: Chapter 6: Foreign Types 35 defcuni
Page 43 and 44: Chapter 6: Foreign Types 39 define-
Page 45 and 46: Chapter 6: Foreign Types 41 foreign
Page 55 and 56: Chapter 6: Foreign Types 51 free-tr
Page 57 and 58: Chapter 6: Foreign Types 53 transla
Page 59 and 60: Chapter 6: Foreign Types 55 with-fo
Page 61 and 62: Chapter 7: Pointers 57 7 Pointers A
Page 63 and 64: Chapter 7: Pointers 59 foreign-free
Page 65 and 66: Chapter 7: Pointers 61 CFFI> (mem-r
Page 67 and 68: Chapter 7: Pointers 63 inc-pointer
Page 69 and 70: Chapter 7: Pointers 65 make-pointer
Page 71 and 72: Chapter 7: Pointers 67 mem-aref Syn
Page 73 and 74: Chapter 7: Pointers 69 null-pointer
Page 75 and 76: Chapter 7: Pointers 71 pointerp Syn
Page 77 and 78: Chapter 7: Pointers 73 pointer-eq S
Page 79 and 80: Chapter 7: Pointers 75 with-foreign
Page 81 and 82: Chapter 8: Strings 77 *default-fore
Page 83 and 84: Chapter 8: Strings 79 foreign-strin
Page 85 and 86: Chapter 8: Strings 81 lisp-string-t
Page 87 and 88: Chapter 8: Strings 83 with-foreign-
Page 89 and 90: Chapter 9: Variables 85 defcvar Syn
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Chapter 9: Variables 87 get-var-poi
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Chapter 10: Functions 89 defcfun Sy
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Chapter 10: Functions 91 foreign-fu
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Chapter 10: Functions 93 foreign-fu
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Chapter 10: Functions 95 translate-
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Chapter 10: Functions 97 translate-
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Chapter 11: Libraries 99 close-fore
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Chapter 11: Libraries 101 define-fo
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Chapter 11: Libraries 103 *foreign-
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Chapter 11: Libraries 105 load-fore
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Chapter 11: Libraries 107 load-fore
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Chapter 12: Callbacks 109 12 Callba
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Chapter 12: Callbacks 111 defcallba
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Chapter 12: Callbacks 113 get-callb
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Chapter 13: The Groveller 115 The t
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Chapter 13: The Groveller 117 (defp
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Appendix A: Platform-specific featu
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Index 121 Index : :boolean &optiona
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Index 123 translate-into-foreign-me
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