mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
c7651744da
If you have a struct containing ‘field’, eg:
type t = { field : int }
then previously to pattern-match on this type, eg. in function
parameters, you had to write:
let f { field = field } =
(* ... use field ... *)
In OCaml >= 3.12 it is possible to abbreviate cases where the field
being matched and the variable being bound have the same name, so now
you can just write:
let f { field } =
(* ... use field ... *)
(Similarly for a field prefixed by a Module name you can use
‘{ Module.field }’ instead of ‘{ Module.field = field }’).
This style is widely used inside the OCaml compiler sources, and is
briefer than the long form, so it makes sense to use it. Furthermore
there was one place in virt-dib where we are already using this new
style, so the old code did not compile on OCaml < 3.12.
See also:
https://forge.ocamlcore.org/docman/view.php/77/112/leroy-cug2010.pdf
634 lines
19 KiB
OCaml
634 lines
19 KiB
OCaml
(* libguestfs
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* Copyright (C) 2009-2017 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*)
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(* Please read generator/README first. *)
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open Printf
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open Std_utils
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open Types
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open Utils
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open Pr
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open Docstrings
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open Optgroups
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open Actions
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open Structs
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open C
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let generate_header = generate_header ~inputs:["generator/php.ml"]
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let rec generate_php_h () =
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generate_header CStyle LGPLv2plus;
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pr "\
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#ifndef PHP_GUESTFS_PHP_H
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#define PHP_GUESTFS_PHP_H 1
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#ifdef ZTS
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#include \"TSRM.h\"
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#endif
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#define PHP_GUESTFS_PHP_EXTNAME \"guestfs_php\"
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#define PHP_GUESTFS_PHP_VERSION \"1.0\"
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PHP_MINIT_FUNCTION (guestfs_php);
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#define PHP_GUESTFS_HANDLE_RES_NAME \"guestfs_h\"
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PHP_FUNCTION (guestfs_create);
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PHP_FUNCTION (guestfs_last_error);
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";
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List.iter (
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fun { name } -> pr "PHP_FUNCTION (guestfs_%s);\n" name
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) (actions |> external_functions |> sort);
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pr "\
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extern zend_module_entry guestfs_php_module_entry;
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#define phpext_guestfs_php_ptr &guestfs_php_module_entry
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#endif /* PHP_GUESTFS_PHP_H */
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"
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and generate_php_c () =
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generate_header CStyle LGPLv2plus;
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pr "\
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/* NOTE: Be very careful with all macros in PHP header files. The
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* morons who wrote them aren't good at making them safe for inclusion
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* in arbitrary places in C code, eg. not using 'do ... while(0)'
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* or parenthesizing any of the arguments.
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*/
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/* NOTE (2): Some parts of the API can't be used on 32 bit platforms.
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* Any 64 bit numbers will be truncated. There's no easy way around
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* this in PHP.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <php.h>
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#include <php_guestfs_php.h>
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#include \"guestfs.h\"
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#include \"guestfs-utils.h\" /* Only for POINTER_NOT_IMPLEMENTED */
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static int res_guestfs_h;
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#if ZEND_MODULE_API_NO >= 20151012
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# define GUESTFS_RETURN_STRING(x, duplicate) \\
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do { if (duplicate) RETURN_STRING(x) else { RETVAL_STRING(x); efree ((char *)x); return; } } while (0)
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# define guestfs_add_assoc_string(arg, key, str, dup) \\
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add_assoc_string(arg, key, str)
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# define guestfs_add_assoc_stringl(arg, key, str, len, dup) \\
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add_assoc_stringl(arg, key, str, len)
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# define guestfs_add_next_index_string(retval, val, x) \\
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add_next_index_string (retval, val)
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# define GUESTFS_ZEND_FETCH_RESOURCE(rsrc, rsrc_type, passed_id, resource_type_name, resource_type) \\
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(rsrc) = (rsrc_type) zend_fetch_resource (Z_RES_P(passed_id), resource_type_name, resource_type)
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typedef size_t guestfs_string_length;
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#else
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# define GUESTFS_RETURN_STRING(x, duplicate) \\
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RETURN_STRING(x, duplicate)
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# define guestfs_add_assoc_string(arg, key, str, dup) \\
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add_assoc_string(arg, key, str, dup)
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# define guestfs_add_assoc_stringl(arg, key, str, len, dup) \\
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add_assoc_stringl(arg, key, str, len, dup)
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# define guestfs_add_next_index_string(retval, val, x) \\
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add_next_index_string (retval, val, x)
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# define GUESTFS_ZEND_FETCH_RESOURCE(rsrc, rsrc_type, passed_id, resource_type_name, resource_type) \\
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ZEND_FETCH_RESOURCE(rsrc, rsrc_type, &(passed_id), -1, resource_type_name, resource_type)
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typedef int guestfs_string_length;
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#endif
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/* Convert array to list of strings.
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* http://marc.info/?l=pecl-dev&m=112205192100631&w=2
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*/
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static char**
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get_stringlist (zval *val)
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{
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char **ret;
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HashTable *a;
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int n;
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HashPosition p;
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#if ZEND_MODULE_API_NO >= 20151012
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zval *d;
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#else
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zval **d;
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#endif
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size_t c = 0;
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a = Z_ARRVAL_P (val);
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n = zend_hash_num_elements (a);
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ret = safe_emalloc (n + 1, sizeof (char *), 0);
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for (zend_hash_internal_pointer_reset_ex (a, &p);
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#if ZEND_MODULE_API_NO >= 20151012
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d = zend_hash_get_current_data_ex (a, &p);
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#else
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zend_hash_get_current_data_ex (a, (void **) &d, &p) == SUCCESS;
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#endif
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zend_hash_move_forward_ex (a, &p)) {
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#if ZEND_MODULE_API_NO >= 20151012
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zval t = *d;
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#else
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zval t = **d;
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#endif
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zval_copy_ctor (&t);
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convert_to_string (&t);
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ret[c] = estrndup (Z_STRVAL(t), Z_STRLEN (t));
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zval_dtor (&t);
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c++;
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}
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ret[c] = NULL;
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return ret;
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}
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static void
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guestfs_efree_stringlist (char **p)
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{
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size_t c = 0;
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for (c = 0; p[c] != NULL; ++c)
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efree (p[c]);
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efree (p);
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}
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#if ZEND_MODULE_API_NO >= 20151012
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static void
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guestfs_php_handle_dtor (zend_resource *rsrc)
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#else
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static void
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guestfs_php_handle_dtor (zend_rsrc_list_entry *rsrc TSRMLS_DC)
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#endif
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{
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guestfs_h *g = (guestfs_h *) rsrc->ptr;
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if (g != NULL)
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guestfs_close (g);
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}
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PHP_MINIT_FUNCTION (guestfs_php)
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{
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res_guestfs_h =
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zend_register_list_destructors_ex (guestfs_php_handle_dtor,
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NULL, PHP_GUESTFS_HANDLE_RES_NAME, module_number);
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return SUCCESS;
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}
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static zend_function_entry guestfs_php_functions[] = {
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PHP_FE (guestfs_create, NULL)
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PHP_FE (guestfs_last_error, NULL)
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";
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List.iter (
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fun { name } -> pr " PHP_FE (guestfs_%s, NULL)\n" name
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) (actions |> external_functions |> sort);
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pr " { NULL, NULL, NULL }
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};
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zend_module_entry guestfs_php_module_entry = {
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#if ZEND_MODULE_API_NO >= 20010901
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STANDARD_MODULE_HEADER,
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#endif
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PHP_GUESTFS_PHP_EXTNAME,
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guestfs_php_functions,
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PHP_MINIT (guestfs_php),
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NULL,
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NULL,
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NULL,
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NULL,
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#if ZEND_MODULE_API_NO >= 20010901
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PHP_GUESTFS_PHP_VERSION,
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#endif
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STANDARD_MODULE_PROPERTIES
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};
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#ifdef COMPILE_DL_GUESTFS_PHP
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ZEND_GET_MODULE (guestfs_php)
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#endif
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PHP_FUNCTION (guestfs_create)
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{
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guestfs_h *g = guestfs_create ();
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if (g == NULL) {
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RETURN_FALSE;
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}
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guestfs_set_error_handler (g, NULL, NULL);
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#if ZEND_MODULE_API_NO >= 20151012
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ZVAL_RES(return_value, zend_register_resource(g, res_guestfs_h));
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#else
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ZEND_REGISTER_RESOURCE (return_value, g, res_guestfs_h);
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#endif
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}
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PHP_FUNCTION (guestfs_last_error)
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{
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zval *z_g;
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guestfs_h *g;
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if (zend_parse_parameters (ZEND_NUM_ARGS() TSRMLS_CC, \"r\",
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&z_g) == FAILURE) {
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RETURN_FALSE;
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}
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GUESTFS_ZEND_FETCH_RESOURCE (g, guestfs_h *, z_g,
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PHP_GUESTFS_HANDLE_RES_NAME, res_guestfs_h);
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if (g == NULL) {
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RETURN_FALSE;
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}
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const char *err = guestfs_last_error (g);
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if (err) {
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GUESTFS_RETURN_STRING (err, 1);
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} else {
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RETURN_NULL ();
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}
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}
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";
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(* Now generate the PHP bindings for each action. *)
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List.iter (
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fun { name = shortname; style = ret, args, optargs as style;
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c_function; c_optarg_prefix } ->
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pr "PHP_FUNCTION (guestfs_%s)\n" shortname;
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pr "{\n";
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pr " zval *z_g;\n";
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pr " guestfs_h *g;\n";
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List.iter (
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function
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| String (_, n)
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| BufferIn n ->
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pr " char *%s;\n" n;
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pr " guestfs_string_length %s_size;\n" n
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| OptString n ->
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pr " char *%s = NULL;\n" n;
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pr " guestfs_string_length %s_size;\n" n
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| StringList (_, n) ->
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pr " zval *z_%s;\n" n;
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pr " char **%s;\n" n;
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| Bool n ->
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pr " zend_bool %s;\n" n
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| Int n | Int64 n ->
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pr " long %s;\n" n
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| Pointer (t, n) ->
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pr " void * /* %s */ %s;\n" t n
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) args;
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if optargs <> [] then (
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pr " struct %s optargs_s = { .bitmask = 0 };\n" c_function;
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pr " struct %s *optargs = &optargs_s;\n" c_function;
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(* XXX Ugh PHP doesn't have proper optional arguments, so we
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* have to use sentinel values.
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*)
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(* Since we don't know if PHP types will exactly match structure
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* types, declare some local variables here.
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*)
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List.iter (
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function
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| OBool n -> pr " zend_bool optargs_t_%s = -1;\n" n
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| OInt n | OInt64 n -> pr " long optargs_t_%s = -1;\n" n
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| OString n ->
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pr " char *optargs_t_%s = NULL;\n" n;
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pr " guestfs_string_length optargs_t_%s_size = -1;\n" n
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| OStringList n ->
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pr " zval *optargs_t_%s = NULL;\n" n
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) optargs
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);
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pr "\n";
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(* Parse the parameters. *)
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let param_string = String.concat "" (
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List.map (
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function
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| String (_, n)
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| BufferIn n -> "s"
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| OptString n -> "s!"
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| StringList (_, n) -> "a"
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| Bool n -> "b"
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| Int n | Int64 n -> "l"
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| Pointer _ -> ""
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) args
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) in
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let param_string =
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if optargs <> [] then
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param_string ^ "|" ^
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String.concat "" (
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List.map (
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function
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| OBool _ -> "b"
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| OInt _ | OInt64 _ -> "l"
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| OString _ -> "s"
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| OStringList _ ->
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(* Because this is an optarg, it can be passed as
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* NULL, so we must add '!' afterwards.
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*)
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"a!"
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) optargs
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)
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else param_string in
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pr " if (zend_parse_parameters (ZEND_NUM_ARGS() TSRMLS_CC, \"r%s\",\n"
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param_string;
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pr " &z_g";
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List.iter (
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function
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| String (_, n)
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| BufferIn n
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| OptString n ->
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pr ", &%s, &%s_size" n n
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| StringList (_, n) ->
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pr ", &z_%s" n
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| Bool n ->
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pr ", &%s" n
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| Int n | Int64 n ->
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pr ", &%s" n
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| Pointer (_, n) -> ()
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) args;
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List.iter (
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function
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| OBool n | OInt n | OInt64 n ->
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pr ", &optargs_t_%s" n
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| OString n ->
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pr ", &optargs_t_%s, &optargs_t_%s_size" n n
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| OStringList n ->
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pr ", &optargs_t_%s" n
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) optargs;
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pr ") == FAILURE) {\n";
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pr " RETURN_FALSE;\n";
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pr " }\n";
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pr "\n";
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pr " GUESTFS_ZEND_FETCH_RESOURCE (g, guestfs_h *, z_g,\n";
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pr " PHP_GUESTFS_HANDLE_RES_NAME, res_guestfs_h);\n";
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pr " if (g == NULL) {\n";
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pr " RETURN_FALSE;\n";
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pr " }\n";
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pr "\n";
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List.iter (
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function
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| String (_, n) ->
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(* Just need to check the string doesn't contain any ASCII
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* NUL characters, which won't be supported by the C API.
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*)
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pr " if (strlen (%s) != %s_size) {\n" n n;
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pr " fprintf (stderr, \"libguestfs: %s: parameter '%s' contains embedded ASCII NUL.\\n\");\n" shortname n;
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pr " RETURN_FALSE;\n";
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pr " }\n";
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pr "\n"
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| OptString n ->
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(* Just need to check the string doesn't contain any ASCII
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* NUL characters, which won't be supported by the C API.
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*)
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pr " if (%s != NULL && strlen (%s) != %s_size) {\n" n n n;
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pr " fprintf (stderr, \"libguestfs: %s: parameter '%s' contains embedded ASCII NUL.\\n\");\n" shortname n;
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pr " RETURN_FALSE;\n";
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pr " }\n";
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pr "\n"
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| BufferIn n -> ()
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| StringList (_, n) ->
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pr " %s = get_stringlist (z_%s);\n" n n;
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pr "\n"
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| Bool _ | Int _ | Int64 _ -> ()
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| Pointer (t, n) ->
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pr " %s = POINTER_NOT_IMPLEMENTED (\"%s\");\n" n t
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) args;
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(* Optional arguments. *)
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if optargs <> [] then (
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List.iter (
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function
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| OBool n ->
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let uc_n = String.uppercase_ascii n in
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pr " if (optargs_t_%s != (zend_bool)-1) {\n" n;
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pr " optargs_s.%s = optargs_t_%s;\n" n n;
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pr " optargs_s.bitmask |= %s_%s_BITMASK;\n" c_optarg_prefix uc_n;
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pr " }\n"
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| OInt n | OInt64 n ->
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let uc_n = String.uppercase_ascii n in
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pr " if (optargs_t_%s != -1) {\n" n;
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pr " optargs_s.%s = optargs_t_%s;\n" n n;
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pr " optargs_s.bitmask |= %s_%s_BITMASK;\n" c_optarg_prefix uc_n;
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pr " }\n"
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| OString n ->
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let uc_n = String.uppercase_ascii n in
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pr " if (optargs_t_%s != NULL) {\n" n;
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pr " optargs_s.%s = optargs_t_%s;\n" n n;
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pr " optargs_s.bitmask |= %s_%s_BITMASK;\n" c_optarg_prefix uc_n;
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pr " }\n"
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| OStringList n ->
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let uc_n = String.uppercase_ascii n in
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pr " /* We've seen PHP give us a *long* here when we asked for an array, so\n";
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pr " * positively check that it gave us an array, otherwise ignore it.\n";
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pr " */\n";
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pr " if (optargs_t_%s != NULL && Z_TYPE_P (optargs_t_%s) == IS_ARRAY) {\n" n n;
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pr " optargs_s.%s = get_stringlist (optargs_t_%s);\n" n n;
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pr " optargs_s.bitmask |= %s_%s_BITMASK;\n" c_optarg_prefix uc_n;
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pr " }\n";
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) optargs;
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pr "\n"
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);
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(* Return value. *)
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(match ret with
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| RErr -> pr " int r;\n"
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| RBool _
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| RInt _ -> pr " int r;\n"
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| RInt64 _ -> pr " int64_t r;\n"
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| RConstString _ -> pr " const char *r;\n"
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| RConstOptString _ -> pr " const char *r;\n"
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| RString _ ->
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pr " char *r;\n"
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| RStringList _ ->
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pr " char **r;\n"
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| RStruct (_, typ) ->
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pr " struct guestfs_%s *r;\n" typ
|
|
| RStructList (_, typ) ->
|
|
pr " struct guestfs_%s_list *r;\n" typ
|
|
| RHashtable _ ->
|
|
pr " char **r;\n"
|
|
| RBufferOut _ ->
|
|
pr " char *r;\n";
|
|
pr " size_t size;\n"
|
|
);
|
|
|
|
(* Call the function. *)
|
|
pr " r = %s " c_function;
|
|
generate_c_call_args ~handle:"g" style;
|
|
pr ";\n";
|
|
pr "\n";
|
|
|
|
(* Free up parameters. *)
|
|
List.iter (
|
|
function
|
|
| String _
|
|
| OptString _
|
|
| BufferIn _ -> ()
|
|
| StringList (_, n) ->
|
|
pr " guestfs_efree_stringlist (%s);\n" n;
|
|
pr "\n"
|
|
| Bool _ | Int _ | Int64 _ | Pointer _ -> ()
|
|
) args;
|
|
List.iter (
|
|
function
|
|
| OBool n | OInt n | OInt64 n | OString n -> ()
|
|
| OStringList n ->
|
|
let uc_n = String.uppercase_ascii n in
|
|
pr " if ((optargs_s.bitmask & %s_%s_BITMASK) != 0)\n"
|
|
c_optarg_prefix uc_n;
|
|
pr " guestfs_efree_stringlist ((char **) optargs_s.%s);\n" n;
|
|
pr "\n"
|
|
) optargs;
|
|
|
|
(* Check for errors. *)
|
|
(match errcode_of_ret ret with
|
|
| `CannotReturnError -> ()
|
|
| `ErrorIsMinusOne ->
|
|
pr " if (r == -1) {\n";
|
|
pr " RETURN_FALSE;\n";
|
|
pr " }\n"
|
|
| `ErrorIsNULL ->
|
|
pr " if (r == NULL) {\n";
|
|
pr " RETURN_FALSE;\n";
|
|
pr " }\n"
|
|
);
|
|
pr "\n";
|
|
|
|
(* Convert the return value. *)
|
|
(match ret with
|
|
| RErr ->
|
|
pr " RETURN_TRUE;\n"
|
|
| RBool _ ->
|
|
pr " RETURN_BOOL (r);\n"
|
|
| RInt _ ->
|
|
pr " RETURN_LONG (r);\n"
|
|
| RInt64 _ ->
|
|
pr " RETURN_LONG (r);\n"
|
|
| RConstString _ ->
|
|
pr " GUESTFS_RETURN_STRING (r, 1);\n"
|
|
| RConstOptString _ ->
|
|
pr " if (r) { GUESTFS_RETURN_STRING (r, 1); }\n";
|
|
pr " else { RETURN_NULL (); }\n"
|
|
| RString _ ->
|
|
pr " char *r_copy = estrdup (r);\n";
|
|
pr " free (r);\n";
|
|
pr " GUESTFS_RETURN_STRING (r_copy, 0);\n"
|
|
| RBufferOut _ ->
|
|
pr " char *r_copy = estrndup (r, size);\n";
|
|
pr " free (r);\n";
|
|
pr " GUESTFS_RETURN_STRING (r_copy, 0);\n"
|
|
| RStringList _ ->
|
|
pr " size_t c = 0;\n";
|
|
pr " array_init (return_value);\n";
|
|
pr " for (c = 0; r[c] != NULL; ++c) {\n";
|
|
pr " guestfs_add_next_index_string (return_value, r[c], 1);\n";
|
|
pr " free (r[c]);\n";
|
|
pr " }\n";
|
|
pr " free (r);\n";
|
|
| RHashtable _ ->
|
|
pr " size_t c = 0;\n";
|
|
pr " array_init (return_value);\n";
|
|
pr " for (c = 0; r[c] != NULL; c += 2) {\n";
|
|
pr " guestfs_add_assoc_string (return_value, r[c], r[c+1], 1);\n";
|
|
pr " free (r[c]);\n";
|
|
pr " free (r[c+1]);\n";
|
|
pr " }\n";
|
|
pr " free (r);\n";
|
|
| RStruct (_, typ) ->
|
|
let cols = cols_of_struct typ in
|
|
generate_php_struct_code typ cols
|
|
| RStructList (_, typ) ->
|
|
let cols = cols_of_struct typ in
|
|
generate_php_struct_list_code typ cols
|
|
);
|
|
|
|
pr "}\n";
|
|
pr "\n"
|
|
) (actions |> external_functions |> sort)
|
|
|
|
and generate_php_struct_code typ cols =
|
|
pr " array_init (return_value);\n";
|
|
List.iter (
|
|
function
|
|
| name, FString ->
|
|
pr " guestfs_add_assoc_string (return_value, \"%s\", r->%s, 1);\n" name name
|
|
| name, FBuffer ->
|
|
pr " guestfs_add_assoc_stringl (return_value, \"%s\", r->%s, r->%s_len, 1);\n"
|
|
name name name
|
|
| name, FUUID ->
|
|
pr " guestfs_add_assoc_stringl (return_value, \"%s\", r->%s, 32, 1);\n"
|
|
name name
|
|
| name, (FBytes|FUInt64|FInt64|FInt32|FUInt32) ->
|
|
pr " add_assoc_long (return_value, \"%s\", r->%s);\n"
|
|
name name
|
|
| name, FChar ->
|
|
pr " guestfs_add_assoc_stringl (return_value, \"%s\", &r->%s, 1, 1);\n"
|
|
name name
|
|
| name, FOptPercent ->
|
|
pr " add_assoc_double (return_value, \"%s\", r->%s);\n"
|
|
name name
|
|
) cols;
|
|
pr " guestfs_free_%s (r);\n" typ
|
|
|
|
and generate_php_struct_list_code typ cols =
|
|
pr " array_init (return_value);\n";
|
|
pr " size_t c = 0;\n";
|
|
pr " for (c = 0; c < r->len; ++c) {\n";
|
|
pr "#if ZEND_MODULE_API_NO >= 20151012\n";
|
|
pr " zval elem;\n";
|
|
pr " zval *z_elem = &elem;\n";
|
|
pr "#else\n";
|
|
pr " zval *z_elem;\n";
|
|
pr " ALLOC_INIT_ZVAL (z_elem);\n";
|
|
pr "#endif\n";
|
|
pr " array_init (z_elem);\n";
|
|
List.iter (
|
|
function
|
|
| name, FString ->
|
|
pr " guestfs_add_assoc_string (z_elem, \"%s\", r->val[c].%s, 1);\n"
|
|
name name
|
|
| name, FBuffer ->
|
|
pr " guestfs_add_assoc_stringl (z_elem, \"%s\", r->val[c].%s, r->val[c].%s_len, 1);\n"
|
|
name name name
|
|
| name, FUUID ->
|
|
pr " guestfs_add_assoc_stringl (z_elem, \"%s\", r->val[c].%s, 32, 1);\n"
|
|
name name
|
|
| name, (FBytes|FUInt64|FInt64|FInt32|FUInt32) ->
|
|
pr " add_assoc_long (z_elem, \"%s\", r->val[c].%s);\n"
|
|
name name
|
|
| name, FChar ->
|
|
pr " guestfs_add_assoc_stringl (z_elem, \"%s\", &r->val[c].%s, 1, 1);\n"
|
|
name name
|
|
| name, FOptPercent ->
|
|
pr " add_assoc_double (z_elem, \"%s\", r->val[c].%s);\n"
|
|
name name
|
|
) cols;
|
|
pr " add_next_index_zval (return_value, z_elem);\n";
|
|
pr " }\n";
|
|
pr " guestfs_free_%s_list (r);\n" typ
|