riched20: Sign-compare warnings fix.
[wine/multimedia.git] / dlls / crypt32 / proplist.c
blob31cd53b6f400f09f2788bbfe214e1215c0ca23d5
1 /*
2 * Copyright 2004-2006 Juan Lang
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
18 #include <assert.h>
19 #include <stdarg.h>
20 #include "windef.h"
21 #include "winbase.h"
22 #include "wincrypt.h"
23 #include "wine/debug.h"
24 #include "wine/list.h"
25 #include "crypt32_private.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
29 typedef struct _CONTEXT_PROPERTY_LIST
31 CRITICAL_SECTION cs;
32 struct list properties;
33 } CONTEXT_PROPERTY_LIST;
35 typedef struct _CONTEXT_PROPERTY
37 DWORD propID;
38 DWORD cbData;
39 LPBYTE pbData;
40 struct list entry;
41 } CONTEXT_PROPERTY, *PCONTEXT_PROPERTY;
43 PCONTEXT_PROPERTY_LIST ContextPropertyList_Create(void)
45 PCONTEXT_PROPERTY_LIST list = CryptMemAlloc(sizeof(CONTEXT_PROPERTY_LIST));
47 if (list)
49 InitializeCriticalSection(&list->cs);
50 list->cs.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PCONTEXT_PROPERTY_LIST->cs");
51 list_init(&list->properties);
53 return list;
56 void ContextPropertyList_Free(PCONTEXT_PROPERTY_LIST list)
58 PCONTEXT_PROPERTY prop, next;
60 LIST_FOR_EACH_ENTRY_SAFE(prop, next, &list->properties, CONTEXT_PROPERTY,
61 entry)
63 list_remove(&prop->entry);
64 CryptMemFree(prop->pbData);
65 CryptMemFree(prop);
67 list->cs.DebugInfo->Spare[0] = 0;
68 DeleteCriticalSection(&list->cs);
69 CryptMemFree(list);
72 BOOL ContextPropertyList_FindProperty(PCONTEXT_PROPERTY_LIST list, DWORD id,
73 PCRYPT_DATA_BLOB blob)
75 PCONTEXT_PROPERTY prop;
76 BOOL ret = FALSE;
78 TRACE("(%p, %d, %p)\n", list, id, blob);
80 EnterCriticalSection(&list->cs);
81 LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
83 if (prop->propID == id)
85 blob->cbData = prop->cbData;
86 blob->pbData = prop->pbData;
87 ret = TRUE;
88 break;
91 LeaveCriticalSection(&list->cs);
92 return ret;
95 BOOL ContextPropertyList_SetProperty(PCONTEXT_PROPERTY_LIST list, DWORD id,
96 const BYTE *pbData, size_t cbData)
98 LPBYTE data;
99 BOOL ret = FALSE;
101 if (cbData)
103 data = CryptMemAlloc(cbData);
104 if (data)
105 memcpy(data, pbData, cbData);
107 else
108 data = NULL;
109 if (!cbData || data)
111 PCONTEXT_PROPERTY prop;
112 BOOL found = FALSE;
114 EnterCriticalSection(&list->cs);
115 LIST_FOR_EACH_ENTRY(prop, &list->properties, CONTEXT_PROPERTY, entry)
117 if (prop->propID == id)
119 found = TRUE;
120 break;
123 if (found)
125 CryptMemFree(prop->pbData);
126 prop->cbData = cbData;
127 prop->pbData = data;
128 ret = TRUE;
130 else
132 prop = CryptMemAlloc(sizeof(CONTEXT_PROPERTY));
133 if (prop)
135 prop->propID = id;
136 prop->cbData = cbData;
137 prop->pbData = data;
138 list_add_tail(&list->properties, &prop->entry);
139 ret = TRUE;
141 else
142 CryptMemFree(data);
144 LeaveCriticalSection(&list->cs);
146 return ret;
149 void ContextPropertyList_RemoveProperty(PCONTEXT_PROPERTY_LIST list, DWORD id)
151 PCONTEXT_PROPERTY prop, next;
153 EnterCriticalSection(&list->cs);
154 LIST_FOR_EACH_ENTRY_SAFE(prop, next, &list->properties, CONTEXT_PROPERTY,
155 entry)
157 if (prop->propID == id)
159 list_remove(&prop->entry);
160 CryptMemFree(prop->pbData);
161 CryptMemFree(prop);
162 break;
165 LeaveCriticalSection(&list->cs);
168 /* Since the properties are stored in a list, this is a tad inefficient
169 * (O(n^2)) since I have to find the previous position every time.
171 DWORD ContextPropertyList_EnumPropIDs(PCONTEXT_PROPERTY_LIST list, DWORD id)
173 DWORD ret;
175 EnterCriticalSection(&list->cs);
176 if (id)
178 PCONTEXT_PROPERTY cursor = NULL;
180 LIST_FOR_EACH_ENTRY(cursor, &list->properties, CONTEXT_PROPERTY, entry)
182 if (cursor->propID == id)
183 break;
185 if (cursor)
187 if (cursor->entry.next != &list->properties)
188 ret = LIST_ENTRY(cursor->entry.next, CONTEXT_PROPERTY,
189 entry)->propID;
190 else
191 ret = 0;
193 else
194 ret = 0;
196 else if (!list_empty(&list->properties))
197 ret = LIST_ENTRY(list->properties.next, CONTEXT_PROPERTY,
198 entry)->propID;
199 else
200 ret = 0;
201 LeaveCriticalSection(&list->cs);
202 return ret;
205 void ContextPropertyList_Copy(PCONTEXT_PROPERTY_LIST to,
206 PCONTEXT_PROPERTY_LIST from)
208 PCONTEXT_PROPERTY prop;
210 EnterCriticalSection(&from->cs);
211 LIST_FOR_EACH_ENTRY(prop, &from->properties, CONTEXT_PROPERTY, entry)
213 ContextPropertyList_SetProperty(to, prop->propID, prop->pbData,
214 prop->cbData);
216 LeaveCriticalSection(&from->cs);