--- /dev/null
+(* libguestfs
+ * Copyright (C) 2009-2010 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *)
+
+(* Please read generator/README first. *)
+
+open Printf
+
+open Generator_types
+open Generator_utils
+open Generator_pr
+open Generator_docstrings
+open Generator_optgroups
+open Generator_actions
+open Generator_structs
+open Generator_c
+
+(* Generate the OCaml bindings interface. *)
+let rec generate_ocaml_mli () =
+ generate_header OCamlStyle LGPLv2plus;
+
+ pr "\
+(** For API documentation you should refer to the C API
+ in the guestfs(3) manual page. The OCaml API uses almost
+ exactly the same calls. *)
+
+type t
+(** A [guestfs_h] handle. *)
+
+exception Error of string
+(** This exception is raised when there is an error. *)
+
+exception Handle_closed of string
+(** This exception is raised if you use a {!Guestfs.t} handle
+ after calling {!close} on it. The string is the name of
+ the function. *)
+
+val create : unit -> t
+(** Create a {!Guestfs.t} handle. *)
+
+val close : t -> unit
+(** Close the {!Guestfs.t} handle and free up all resources used
+ by it immediately.
+
+ Handles are closed by the garbage collector when they become
+ unreferenced, but callers can call this in order to provide
+ predictable cleanup. *)
+
+type progress_cb = int -> int -> int64 -> int64 -> unit
+
+val set_progress_callback : t -> progress_cb -> unit
+(** [set_progress_callback g f] sets [f] as the progress callback function.
+ For some long-running functions, [f] will be called repeatedly
+ during the function with progress updates.
+
+ The callback is [f proc_nr serial position total]. See
+ the description of [guestfs_set_progress_callback] in guestfs(3)
+ for the meaning of these four numbers.
+
+ Note that if the closure captures a reference to the handle,
+ this reference will prevent the handle from being
+ automatically closed by the garbage collector. There are
+ three ways to avoid this: be careful not to capture the handle
+ in the closure, or use a weak reference, or call
+ {!Guestfs.clear_progress_callback} to remove the reference. *)
+
+val clear_progress_callback : t -> unit
+(** [clear_progress_callback g] removes any progress callback function
+ associated with the handle. See {!Guestfs.set_progress_callback}. *)
+
+";
+ generate_ocaml_structure_decls ();
+
+ (* The actions. *)
+ List.iter (
+ fun (name, style, _, _, _, shortdesc, _) ->
+ generate_ocaml_prototype name style;
+ pr "(** %s *)\n" shortdesc;
+ pr "\n"
+ ) all_functions_sorted
+
+(* Generate the OCaml bindings implementation. *)
+and generate_ocaml_ml () =
+ generate_header OCamlStyle LGPLv2plus;
+
+ pr "\
+type t
+
+exception Error of string
+exception Handle_closed of string
+
+external create : unit -> t = \"ocaml_guestfs_create\"
+external close : t -> unit = \"ocaml_guestfs_close\"
+
+type progress_cb = int -> int -> int64 -> int64 -> unit
+
+external set_progress_callback : t -> progress_cb -> unit
+ = \"ocaml_guestfs_set_progress_callback\"
+external clear_progress_callback : t -> unit
+ = \"ocaml_guestfs_clear_progress_callback\"
+
+(* Give the exceptions names, so they can be raised from the C code. *)
+let () =
+ Callback.register_exception \"ocaml_guestfs_error\" (Error \"\");
+ Callback.register_exception \"ocaml_guestfs_closed\" (Handle_closed \"\")
+
+";
+
+ generate_ocaml_structure_decls ();
+
+ (* The actions. *)
+ List.iter (
+ fun (name, style, _, _, _, shortdesc, _) ->
+ generate_ocaml_prototype ~is_external:true name style;
+ ) all_functions_sorted
+
+(* Generate the OCaml bindings C implementation. *)
+and generate_ocaml_c () =
+ generate_header CStyle LGPLv2plus;
+
+ pr "\
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <caml/config.h>
+#include <caml/alloc.h>
+#include <caml/callback.h>
+#include <caml/fail.h>
+#include <caml/memory.h>
+#include <caml/mlvalues.h>
+#include <caml/signals.h>
+
+#include \"guestfs.h\"
+
+#include \"guestfs_c.h\"
+
+/* Copy a hashtable of string pairs into an assoc-list. We return
+ * the list in reverse order, but hashtables aren't supposed to be
+ * ordered anyway.
+ */
+static CAMLprim value
+copy_table (char * const * argv)
+{
+ CAMLparam0 ();
+ CAMLlocal5 (rv, pairv, kv, vv, cons);
+ size_t i;
+
+ rv = Val_int (0);
+ for (i = 0; argv[i] != NULL; i += 2) {
+ kv = caml_copy_string (argv[i]);
+ vv = caml_copy_string (argv[i+1]);
+ pairv = caml_alloc (2, 0);
+ Store_field (pairv, 0, kv);
+ Store_field (pairv, 1, vv);
+ cons = caml_alloc (2, 0);
+ Store_field (cons, 1, rv);
+ rv = cons;
+ Store_field (cons, 0, pairv);
+ }
+
+ CAMLreturn (rv);
+}
+
+";
+
+ (* Struct copy functions. *)
+
+ let emit_ocaml_copy_list_function typ =
+ pr "static CAMLprim value\n";
+ pr "copy_%s_list (const struct guestfs_%s_list *%ss)\n" typ typ typ;
+ pr "{\n";
+ pr " CAMLparam0 ();\n";
+ pr " CAMLlocal2 (rv, v);\n";
+ pr " unsigned int i;\n";
+ pr "\n";
+ pr " if (%ss->len == 0)\n" typ;
+ pr " CAMLreturn (Atom (0));\n";
+ pr " else {\n";
+ pr " rv = caml_alloc (%ss->len, 0);\n" typ;
+ pr " for (i = 0; i < %ss->len; ++i) {\n" typ;
+ pr " v = copy_%s (&%ss->val[i]);\n" typ typ;
+ pr " caml_modify (&Field (rv, i), v);\n";
+ pr " }\n";
+ pr " CAMLreturn (rv);\n";
+ pr " }\n";
+ pr "}\n";
+ pr "\n";
+ in
+
+ List.iter (
+ fun (typ, cols) ->
+ let has_optpercent_col =
+ List.exists (function (_, FOptPercent) -> true | _ -> false) cols in
+
+ pr "static CAMLprim value\n";
+ pr "copy_%s (const struct guestfs_%s *%s)\n" typ typ typ;
+ pr "{\n";
+ pr " CAMLparam0 ();\n";
+ if has_optpercent_col then
+ pr " CAMLlocal3 (rv, v, v2);\n"
+ else
+ pr " CAMLlocal2 (rv, v);\n";
+ pr "\n";
+ pr " rv = caml_alloc (%d, 0);\n" (List.length cols);
+ iteri (
+ fun i col ->
+ (match col with
+ | name, FString ->
+ pr " v = caml_copy_string (%s->%s);\n" typ name
+ | name, FBuffer ->
+ pr " v = caml_alloc_string (%s->%s_len);\n" typ name;
+ pr " memcpy (String_val (v), %s->%s, %s->%s_len);\n"
+ typ name typ name
+ | name, FUUID ->
+ pr " v = caml_alloc_string (32);\n";
+ pr " memcpy (String_val (v), %s->%s, 32);\n" typ name
+ | name, (FBytes|FInt64|FUInt64) ->
+ pr " v = caml_copy_int64 (%s->%s);\n" typ name
+ | name, (FInt32|FUInt32) ->
+ pr " v = caml_copy_int32 (%s->%s);\n" typ name
+ | name, FOptPercent ->
+ pr " if (%s->%s >= 0) { /* Some %s */\n" typ name name;
+ pr " v2 = caml_copy_double (%s->%s);\n" typ name;
+ pr " v = caml_alloc (1, 0);\n";
+ pr " Store_field (v, 0, v2);\n";
+ pr " } else /* None */\n";
+ pr " v = Val_int (0);\n";
+ | name, FChar ->
+ pr " v = Val_int (%s->%s);\n" typ name
+ );
+ pr " Store_field (rv, %d, v);\n" i
+ ) cols;
+ pr " CAMLreturn (rv);\n";
+ pr "}\n";
+ pr "\n";
+ ) structs;
+
+ (* Emit a copy_TYPE_list function definition only if that function is used. *)
+ List.iter (
+ function
+ | typ, (RStructListOnly | RStructAndList) ->
+ (* generate the function for typ *)
+ emit_ocaml_copy_list_function typ
+ | typ, _ -> () (* empty *)
+ ) (rstructs_used_by all_functions);
+
+ (* The wrappers. *)
+ List.iter (
+ fun (name, style, _, _, _, _, _) ->
+ pr "/* Automatically generated wrapper for function\n";
+ pr " * ";
+ generate_ocaml_prototype name style;
+ pr " */\n";
+ pr "\n";
+
+ let params =
+ "gv" :: List.map (fun arg -> name_of_argt arg ^ "v") (snd style) in
+
+ let needs_extra_vs =
+ match fst style with RConstOptString _ -> true | _ -> false in
+
+ pr "/* Emit prototype to appease gcc's -Wmissing-prototypes. */\n";
+ pr "CAMLprim value ocaml_guestfs_%s (value %s" name (List.hd params);
+ List.iter (pr ", value %s") (List.tl params); pr ");\n";
+ pr "\n";
+
+ pr "CAMLprim value\n";
+ pr "ocaml_guestfs_%s (value %s" name (List.hd params);
+ List.iter (pr ", value %s") (List.tl params);
+ pr ")\n";
+ pr "{\n";
+
+ (match params with
+ | [p1; p2; p3; p4; p5] ->
+ pr " CAMLparam5 (%s);\n" (String.concat ", " params)
+ | p1 :: p2 :: p3 :: p4 :: p5 :: rest ->
+ pr " CAMLparam5 (%s);\n" (String.concat ", " [p1; p2; p3; p4; p5]);
+ pr " CAMLxparam%d (%s);\n"
+ (List.length rest) (String.concat ", " rest)
+ | ps ->
+ pr " CAMLparam%d (%s);\n" (List.length ps) (String.concat ", " ps)
+ );
+ if not needs_extra_vs then
+ pr " CAMLlocal1 (rv);\n"
+ else
+ pr " CAMLlocal3 (rv, v, v2);\n";
+ pr "\n";
+
+ pr " guestfs_h *g = Guestfs_val (gv);\n";
+ pr " if (g == NULL)\n";
+ pr " ocaml_guestfs_raise_closed (\"%s\");\n" name;
+ pr "\n";
+
+ List.iter (
+ function
+ | Pathname n
+ | Device n | Dev_or_Path n
+ | String n
+ | FileIn n
+ | FileOut n
+ | Key n ->
+ (* Copy strings in case the GC moves them: RHBZ#604691 *)
+ pr " char *%s = guestfs_safe_strdup (g, String_val (%sv));\n" n n
+ | OptString n ->
+ pr " char *%s =\n" n;
+ pr " %sv != Val_int (0) ?" n;
+ pr " guestfs_safe_strdup (g, String_val (Field (%sv, 0))) : NULL;\n" n
+ | BufferIn n ->
+ pr " size_t %s_size = caml_string_length (%sv);\n" n n;
+ pr " char *%s = guestfs_safe_memdup (g, String_val (%sv), %s_size);\n" n n n
+ | StringList n | DeviceList n ->
+ pr " char **%s = ocaml_guestfs_strings_val (g, %sv);\n" n n
+ | Bool n ->
+ pr " int %s = Bool_val (%sv);\n" n n
+ | Int n ->
+ pr " int %s = Int_val (%sv);\n" n n
+ | Int64 n ->
+ pr " int64_t %s = Int64_val (%sv);\n" n n
+ ) (snd style);
+ let error_code =
+ match fst style with
+ | RErr -> pr " int r;\n"; "-1"
+ | RInt _ -> pr " int r;\n"; "-1"
+ | RInt64 _ -> pr " int64_t r;\n"; "-1"
+ | RBool _ -> pr " int r;\n"; "-1"
+ | RConstString _ | RConstOptString _ ->
+ pr " const char *r;\n"; "NULL"
+ | RString _ -> pr " char *r;\n"; "NULL"
+ | RStringList _ ->
+ pr " size_t i;\n";
+ pr " char **r;\n";
+ "NULL"
+ | RStruct (_, typ) ->
+ pr " struct guestfs_%s *r;\n" typ; "NULL"
+ | RStructList (_, typ) ->
+ pr " struct guestfs_%s_list *r;\n" typ; "NULL"
+ | RHashtable _ ->
+ pr " size_t i;\n";
+ pr " char **r;\n";
+ "NULL"
+ | RBufferOut _ ->
+ pr " char *r;\n";
+ pr " size_t size;\n";
+ "NULL" in
+ pr "\n";
+
+ pr " caml_enter_blocking_section ();\n";
+ pr " r = guestfs_%s " name;
+ generate_c_call_args ~handle:"g" style;
+ pr ";\n";
+ pr " caml_leave_blocking_section ();\n";
+
+ (* Free strings if we copied them above. *)
+ List.iter (
+ function
+ | Pathname n | Device n | Dev_or_Path n | String n | OptString n
+ | FileIn n | FileOut n | BufferIn n | Key n ->
+ pr " free (%s);\n" n
+ | StringList n | DeviceList n ->
+ pr " ocaml_guestfs_free_strings (%s);\n" n;
+ | Bool _ | Int _ | Int64 _ -> ()
+ ) (snd style);
+
+ pr " if (r == %s)\n" error_code;
+ pr " ocaml_guestfs_raise_error (g, \"%s\");\n" name;
+ pr "\n";
+
+ (match fst style with
+ | RErr -> pr " rv = Val_unit;\n"
+ | RInt _ -> pr " rv = Val_int (r);\n"
+ | RInt64 _ ->
+ pr " rv = caml_copy_int64 (r);\n"
+ | RBool _ -> pr " rv = Val_bool (r);\n"
+ | RConstString _ ->
+ pr " rv = caml_copy_string (r);\n"
+ | RConstOptString _ ->
+ pr " if (r) { /* Some string */\n";
+ pr " v = caml_alloc (1, 0);\n";
+ pr " v2 = caml_copy_string (r);\n";
+ pr " Store_field (v, 0, v2);\n";
+ pr " } else /* None */\n";
+ pr " v = Val_int (0);\n";
+ | RString _ ->
+ pr " rv = caml_copy_string (r);\n";
+ pr " free (r);\n"
+ | RStringList _ ->
+ pr " rv = caml_copy_string_array ((const char **) r);\n";
+ pr " for (i = 0; r[i] != NULL; ++i) free (r[i]);\n";
+ pr " free (r);\n"
+ | RStruct (_, typ) ->
+ pr " rv = copy_%s (r);\n" typ;
+ pr " guestfs_free_%s (r);\n" typ;
+ | RStructList (_, typ) ->
+ pr " rv = copy_%s_list (r);\n" typ;
+ pr " guestfs_free_%s_list (r);\n" typ;
+ | RHashtable _ ->
+ pr " rv = copy_table (r);\n";
+ pr " for (i = 0; r[i] != NULL; ++i) free (r[i]);\n";
+ pr " free (r);\n";
+ | RBufferOut _ ->
+ pr " rv = caml_alloc_string (size);\n";
+ pr " memcpy (String_val (rv), r, size);\n";
+ );
+
+ pr " CAMLreturn (rv);\n";
+ pr "}\n";
+ pr "\n";
+
+ if List.length params > 5 then (
+ pr "/* Emit prototype to appease gcc's -Wmissing-prototypes. */\n";
+ pr "CAMLprim value ";
+ pr "ocaml_guestfs_%s_byte (value *argv, int argn);\n" name;
+ pr "CAMLprim value\n";
+ pr "ocaml_guestfs_%s_byte (value *argv, int argn)\n" name;
+ pr "{\n";
+ pr " return ocaml_guestfs_%s (argv[0]" name;
+ iteri (fun i _ -> pr ", argv[%d]" i) (List.tl params);
+ pr ");\n";
+ pr "}\n";
+ pr "\n"
+ )
+ ) all_functions_sorted
+
+and generate_ocaml_structure_decls () =
+ List.iter (
+ fun (typ, cols) ->
+ pr "type %s = {\n" typ;
+ List.iter (
+ function
+ | name, FString -> pr " %s : string;\n" name
+ | name, FBuffer -> pr " %s : string;\n" name
+ | name, FUUID -> pr " %s : string;\n" name
+ | name, (FBytes|FInt64|FUInt64) -> pr " %s : int64;\n" name
+ | name, (FInt32|FUInt32) -> pr " %s : int32;\n" name
+ | name, FChar -> pr " %s : char;\n" name
+ | name, FOptPercent -> pr " %s : float option;\n" name
+ ) cols;
+ pr "}\n";
+ pr "\n"
+ ) structs
+
+and generate_ocaml_prototype ?(is_external = false) name style =
+ if is_external then pr "external " else pr "val ";
+ pr "%s : t -> " name;
+ List.iter (
+ function
+ | Pathname _ | Device _ | Dev_or_Path _ | String _ | FileIn _ | FileOut _
+ | BufferIn _ | Key _ -> pr "string -> "
+ | OptString _ -> pr "string option -> "
+ | StringList _ | DeviceList _ -> pr "string array -> "
+ | Bool _ -> pr "bool -> "
+ | Int _ -> pr "int -> "
+ | Int64 _ -> pr "int64 -> "
+ ) (snd style);
+ (match fst style with
+ | RErr -> pr "unit" (* all errors are turned into exceptions *)
+ | RInt _ -> pr "int"
+ | RInt64 _ -> pr "int64"
+ | RBool _ -> pr "bool"
+ | RConstString _ -> pr "string"
+ | RConstOptString _ -> pr "string option"
+ | RString _ | RBufferOut _ -> pr "string"
+ | RStringList _ -> pr "string array"
+ | RStruct (_, typ) -> pr "%s" typ
+ | RStructList (_, typ) -> pr "%s array" typ
+ | RHashtable _ -> pr "(string * string) list"
+ );
+ if is_external then (
+ pr " = ";
+ if List.length (snd style) + 1 > 5 then
+ pr "\"ocaml_guestfs_%s_byte\" " name;
+ pr "\"ocaml_guestfs_%s\"" name
+ );
+ pr "\n"
git.annexia.org / libguestfs.git / blobdiff