1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #ifndef BASE_STARTUP_PARAM_INCLUDE_H
16 #define BASE_STARTUP_PARAM_INCLUDE_H
17 #include <stdio.h>
18
19 #include "param_osadp.h"
20 #include "param_trie.h"
21
22 #ifdef __cplusplus
23 #if __cplusplus
24 extern "C" {
25 #endif
26 #endif
27
GetNextKey(const char ** remainingKey,char ** subKey,uint32_t * subKeyLen,const char * end)28 STATIC_INLINE void GetNextKey(const char **remainingKey, char **subKey, uint32_t *subKeyLen, const char *end)
29 {
30 *subKey = strchr(*remainingKey, '.');
31 if (*subKey != NULL) {
32 *subKeyLen = *subKey - *remainingKey;
33 } else {
34 *subKeyLen = end - *remainingKey;
35 }
36 }
37
FindSubTrie(const WorkSpace * workSpace,ParamTrieNode * current,const char * key,uint32_t keyLen,uint32_t * matchLabel)38 STATIC_INLINE ParamTrieNode *FindSubTrie(const WorkSpace *workSpace,
39 ParamTrieNode *current, const char *key, uint32_t keyLen, uint32_t *matchLabel)
40 {
41 ParamTrieNode *subTrie = current;
42 int ret = 0;
43 while (subTrie != NULL) {
44 if (subTrie->length > keyLen) {
45 ret = -1;
46 } else if (subTrie->length < keyLen) {
47 ret = 1;
48 } else {
49 ret = memcmp(subTrie->key, key, keyLen);
50 if (ret == 0) {
51 PARAM_CHECK(matchLabel != NULL, return NULL, "Invalid matchLabel");
52 *matchLabel = (subTrie->labelIndex != 0) ? subTrie->labelIndex : *matchLabel;
53 return subTrie;
54 }
55 }
56
57 uint32_t offset = 0;
58 if (ret < 0) {
59 offset = subTrie->left;
60 } else {
61 offset = subTrie->right;
62 }
63 if (offset == 0 || offset > workSpace->area->dataSize) {
64 return NULL;
65 }
66 subTrie = (ParamTrieNode *)(workSpace->area->data + offset);
67 }
68 return NULL;
69 }
70
FindTrieNode_(const WorkSpace * workSpace,const char * key,uint32_t keyLen,uint32_t * matchLabel)71 STATIC_INLINE ParamTrieNode *FindTrieNode_(
72 const WorkSpace *workSpace, const char *key, uint32_t keyLen, uint32_t *matchLabel)
73 {
74 const char *remainingKey = key;
75 ParamTrieNode *current = GetTrieRoot(workSpace);
76 PARAM_CHECK(current != NULL, return NULL, "Invalid current param %s", key);
77 *matchLabel = current->labelIndex;
78 const char *end = key + keyLen;
79 while (1) {
80 uint32_t subKeyLen = 0;
81 char *subKey = NULL;
82 GetNextKey(&remainingKey, &subKey, &subKeyLen, end);
83 if (!subKeyLen) {
84 return NULL;
85 }
86 if (current->child != 0) {
87 ParamTrieNode *next = GetTrieNode(workSpace, current->child);
88 current = FindSubTrie(workSpace, next, remainingKey, subKeyLen, matchLabel);
89 } else {
90 current = FindSubTrie(workSpace, current, remainingKey, subKeyLen, matchLabel);
91 }
92 if (current == NULL) {
93 return NULL;
94 } else if (current->labelIndex != 0) {
95 *matchLabel = current->labelIndex;
96 }
97 if (subKey == NULL || strcmp(subKey, ".") == 0) {
98 break;
99 }
100 remainingKey = subKey + 1;
101 }
102 return current;
103 }
104
105 #ifdef __cplusplus
106 #if __cplusplus
107 }
108 #endif
109 #endif
110 #endif // BASE_STARTUP_PARAM_INCLUDE_H