-(** Interface to Perl from OCaml.
- *
- * Copyright (C) 2003 Merjis Ltd.
- *
- * $Id: perl.mli,v 1.12 2004-03-03 12:39:20 rich Exp $
+(** Interface to Perl from OCaml. *)
+(* Copyright (C) 2003 Merjis Ltd.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this library; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+
+ $Id: perl.mli,v 1.16 2008-03-01 13:02:21 rich Exp $
*)
type sv
| SVt_NV (** Floating point scalar. *)
| SVt_PV (** String scalar. *)
| SVt_RV (** Reference. *)
- | SVt_PVAV (** Array ref. *)
- | SVt_PVHV (** Hash ref. *)
- | SVt_PVCV (** Code ref. *)
- | SVt_PVGV (** Glob. *)
+ | SVt_PVAV (** Array. *)
+ | SVt_PVHV (** Hash. *)
+ | SVt_PVCV (** Code. *)
+ | SVt_PVGV (** Glob (possibly a file handle). *)
| SVt_PVMG (** Blessed or magical scalar. *)
val sv_type : sv -> sv_t
(** Return the type of data contained in an [SV]. Somewhat equivalent to
val string_of_sv_t : sv_t -> string
(** Return a printable string for an [sv_t] ([SV] type). *)
+val reftype : sv -> sv_t
+(** The parameter [sv] must be a reference. This convenience function
+ * works out what it is a reference to, either a scalar, array, hash,
+ * code or glob. If the parameter is not a reference, or is a reference
+ * to an unknown type, then this will throw [Invalid_argument]. *)
+
+val address_of_sv : sv -> Nativeint.t
+(** Returns the address of the SV. Useful for debugging since
+ * Perl also prints out addresses on internal errors.
+ *)
+val address_of_av : av -> Nativeint.t
+(** Returns the address of the AV. Useful for debugging since
+ * Perl also prints out addresses on internal errors.
+ *)
+val address_of_hv : hv -> Nativeint.t
+(** Returns the address of the HV. Useful for debugging since
+ * Perl also prints out addresses on internal errors.
+ *)
+
val scalarref : sv -> sv
(** Given a scalar, this returns a reference to the scalar. Note that
* because references are [SV]s, this returns [sv].
val av_undef : av -> unit
(** Delete the [AV] (and all elements in it). Same as Perl [undef \@av]. *)
val av_extend : av -> int -> unit
-(** Extend the [AV] so it contains at least [n+1] elements. *)
+(** Extend the [AV] so it contains at least [n+1] elements. Note that
+ * this apparently just changes the amount of allocated storage. The
+ * extra elements are not visible until you store something in them.
+ *)
val av_map : (sv -> 'a) -> av -> 'a list
(** Map a function over the elements in the [AV], return a list of the
* results. *)
(** Remove all elements from the [HV]. Same as Perl [%av = ()]. *)
val hv_undef : hv -> unit
(** Delete the [HV] (and all elements in it). Same as Perl [undef %hv]. *)
+val hv_of_assoc : (string * sv) list -> hv
+(** Create an [HV] directly from an assoc list. Perl hashes cannot
+ * support multiple values attached to the same key, so if you try
+ * to provide an assoc list with multiple identical keys, the results
+ * will be undefined.
+ *)
+val assoc_of_hv : hv -> (string * sv) list
+(** Take an [HV] and return an assoc list. *)
+val hv_keys : hv -> string list
+(** Return all the keys of an [HV]. *)
+val hv_values : hv -> sv list
+(** Return all the values of an [HV]. *)
+
+(* The following are the low-level iteration interface to hashes,
+ * which you probably shouldn't use directly. Use {!hv_keys},
+ * {!assoc_of_hv}, etc. instead. See [perlguts(3)] if you really
+ * want to use this interface.
+ *)
+type he
+val hv_iterinit : hv -> Int32.t
+val hv_iternext : hv -> he
+val hv_iterkey : he -> string
+val hv_iterval : hv -> he -> sv
+val hv_iternextsv : hv -> string * sv
val get_sv : ?create:bool -> string -> sv
-(** Return a scalar value by name. For example, if you have a symbol
- * called [$a] in Perl, then [get_sv "a"] will return its value.
- *
- * If the symbol does not exist, this throws [Not_found].
- *
- * If the optional [?create] argument is set to true and the symbol does
- * not exist, then Perl will create the symbol (with value [undef]) and
- * this function will return the [SV] for [undef].
+ (** Return a scalar value by name. For example, if you have a symbol
+ * called [$a] in Perl, then [get_sv "a"] will return its value.
+ *
+ * If the symbol does not exist, this throws [Not_found].
+ *
+ * If the optional [?create] argument is set to true and the symbol does
+ * not exist, then Perl will create the symbol (with value [undef]) and
+ * this function will return the [SV] for [undef].
*)
val get_av : ?create:bool -> string -> av
(** Same as {!Perl.get_sv} except will return and/or create [\@a]. *)
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