1 | /* |
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2 | * AT-SPI - Assistive Technology Service Provider Interface |
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3 | * (Gnome Accessibility Project; http://developer.gnome.org/projects/gap) |
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4 | * |
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5 | * Copyright 2001, 2002 Sun Microsystems Inc., |
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6 | * Copyright 2001, 2002 Ximian, Inc. |
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7 | * |
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8 | * This library is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Library General Public |
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10 | * License as published by the Free Software Foundation; either |
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11 | * version 2 of the License, or (at your option) any later version. |
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12 | * |
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13 | * This library is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * Library General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Library General Public |
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19 | * License along with this library; if not, write to the |
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20 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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21 | * Boston, MA 02111-1307, USA. |
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22 | */ |
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23 | |
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24 | #include <glib/gmessages.h> |
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25 | #include <glib/gslist.h> |
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26 | |
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27 | #include "spi-private.h" |
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28 | |
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29 | typedef struct { |
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30 | GList **list; |
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31 | GList *iterator; |
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32 | } Iteration; |
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33 | |
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34 | static GSList *working_list = NULL; /* of Iteration */ |
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35 | |
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36 | static char *spi_atk_bridge_null_string = ""; |
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37 | |
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38 | /* |
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39 | * deletes an element from the list - in a re-entrant |
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40 | * safe fashion; advances the element pointer to the next |
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41 | * element. |
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42 | */ |
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43 | void |
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44 | spi_re_entrant_list_delete_link (GList * const *element_ptr) |
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45 | { |
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46 | GSList *l; |
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47 | GList *next; |
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48 | GList *element; |
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49 | gboolean first_item; |
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50 | |
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51 | g_return_if_fail (element_ptr != NULL); |
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52 | |
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53 | element = *element_ptr; |
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54 | g_return_if_fail (element != NULL); |
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55 | |
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56 | next = element->next; |
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57 | first_item = (element->prev == NULL); |
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58 | |
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59 | g_list_remove_link (NULL, element); |
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60 | |
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61 | for (l = working_list; l; l = l->next) |
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62 | { |
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63 | Iteration *i = l->data; |
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64 | |
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65 | if (i->iterator == element) |
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66 | { |
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67 | i->iterator = next; |
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68 | } |
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69 | |
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70 | if (first_item && *(i->list) == element) |
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71 | { |
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72 | *(i->list) = next; |
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73 | } |
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74 | } |
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75 | |
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76 | g_list_free_1 (element); |
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77 | } |
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78 | |
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79 | void |
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80 | spi_re_entrant_list_foreach (GList **list, |
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81 | SpiReEntrantFn func, |
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82 | gpointer user_data) |
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83 | { |
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84 | Iteration i; |
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85 | |
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86 | if (!list || !*list) |
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87 | { |
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88 | return; |
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89 | } |
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90 | |
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91 | i.list = list; |
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92 | i.iterator = *list; |
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93 | |
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94 | working_list = g_slist_prepend (working_list, &i); |
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95 | |
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96 | while (i.iterator) { |
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97 | GList *l = i.iterator; |
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98 | |
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99 | func (&i.iterator, user_data); |
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100 | |
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101 | if (i.iterator == l) |
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102 | i.iterator = i.iterator->next; |
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103 | } |
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104 | |
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105 | working_list = g_slist_remove (working_list, &i); |
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106 | } |
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107 | |
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108 | void |
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109 | spi_init_any_nil (CORBA_any *any) |
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110 | { |
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111 | any->_type = TC_null; |
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112 | any->_value = NULL; |
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113 | any->_release = FALSE; |
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114 | } |
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115 | |
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116 | void |
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117 | spi_init_any_object (CORBA_any *any, CORBA_Object *o) |
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118 | { |
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119 | CORBA_Environment ev; |
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120 | CORBA_exception_init (&ev); |
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121 | |
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122 | any->_type = TC_CORBA_Object; |
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123 | any->_value = o; |
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124 | any->_release = FALSE; |
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125 | CORBA_exception_free (&ev); |
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126 | } |
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127 | |
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128 | void |
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129 | spi_init_any_string (CORBA_any *any, char **string_pointer) |
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130 | { |
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131 | any->_type = (CORBA_TypeCode) TC_CORBA_string; |
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132 | if (string_pointer && *string_pointer) |
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133 | any->_value = string_pointer; |
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134 | else |
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135 | any->_value = &spi_atk_bridge_null_string; |
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136 | any->_release = FALSE; |
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137 | } |
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