Azure IoT
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serializer
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jsonencoder.c
00001 // Copyright (c) Microsoft. All rights reserved. 00002 // Licensed under the MIT license. See LICENSE file in the project root for full license information. 00003 00004 #include "azure_c_shared_utility/gballoc.h" 00005 00006 #include "jsonencoder.h" 00007 #include "azure_c_shared_utility/crt_abstractions.h" 00008 #include "azure_c_shared_utility/xlogging.h" 00009 #include "azure_c_shared_utility/strings.h" 00010 00011 #ifdef _MSC_VER 00012 #pragma warning(disable: 4701) /* potentially uninitialized local variable 'result' used */ /* the scanner cannot track variable "i" and link it to childCount*/ 00013 #endif 00014 00015 DEFINE_ENUM_STRINGS(JSON_ENCODER_TOSTRING_RESULT, JSON_ENCODER_TOSTRING_RESULT_VALUES); 00016 DEFINE_ENUM_STRINGS(JSON_ENCODER_RESULT, JSON_ENCODER_RESULT_VALUES); 00017 00018 JSON_ENCODER_RESULT JSONEncoder_EncodeTree(MULTITREE_HANDLE treeHandle, STRING_HANDLE destination, JSON_ENCODER_TOSTRING_FUNC toStringFunc) 00019 { 00020 JSON_ENCODER_RESULT result; 00021 00022 size_t childCount; 00023 00024 /* Codes_SRS_JSON_ENCODER_99_032:[If any of the arguments passed to JSONEncoder_EncodeTree is NULL then JSON_ENCODER_INVALID_ARG shall be returned.] */ 00025 if ((treeHandle == NULL) || 00026 (destination == NULL) || 00027 (toStringFunc == NULL)) 00028 { 00029 result = JSON_ENCODER_INVALID_ARG; 00030 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00031 } 00032 /*Codes_SRS_JSON_ENCODER_99_035:[ JSON encoder shall inquire the number of child nodes (further called childCount) of the current node (given by parameter treeHandle.]*/ 00033 else if (MultiTree_GetChildCount(treeHandle, &childCount) != MULTITREE_OK) 00034 { 00035 result = JSON_ENCODER_MULTITREE_ERROR; 00036 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00037 } 00038 else 00039 { 00040 size_t i; 00041 /*Codes_SRS_JSON_ENCODER_99_036:[ The string "{" shall be added to the output;]*/ 00042 if (STRING_concat(destination, "{") != 0) 00043 { 00044 result = JSON_ENCODER_ERROR; 00045 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00046 } 00047 else 00048 { 00049 result = JSON_ENCODER_OK; 00050 for (i = 0; (i < childCount) && (result == JSON_ENCODER_OK); i++) 00051 { 00052 MULTITREE_HANDLE childTreeHandle; 00053 00054 if ((i > 0) && 00055 (STRING_concat(destination, ", ") != 0)) 00056 { 00057 result = JSON_ENCODER_ERROR; 00058 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00059 } 00060 else if (STRING_concat(destination, "\"") != 0) 00061 { 00062 result = JSON_ENCODER_ERROR; 00063 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00064 } 00065 else 00066 { 00067 STRING_HANDLE name = STRING_new(); 00068 if (name == NULL) 00069 { 00070 result = JSON_ENCODER_ERROR; 00071 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00072 } 00073 else 00074 { 00075 if (MultiTree_GetChild(treeHandle, i, &childTreeHandle) != MULTITREE_OK) 00076 { 00077 result = JSON_ENCODER_MULTITREE_ERROR; 00078 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00079 } 00080 else if (MultiTree_GetName(childTreeHandle, name) != MULTITREE_OK) 00081 { 00082 result = JSON_ENCODER_MULTITREE_ERROR; 00083 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00084 } 00085 else if (STRING_concat_with_STRING(destination, name) != 0) 00086 { 00087 result = JSON_ENCODER_ERROR; 00088 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00089 } 00090 else if (STRING_concat(destination, "\":") != 0) 00091 { 00092 result = JSON_ENCODER_ERROR; 00093 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00094 } 00095 else 00096 { 00097 size_t innerChildCount; 00098 if (MultiTree_GetChildCount(childTreeHandle, &innerChildCount) != MULTITREE_OK) 00099 { 00100 result = JSON_ENCODER_MULTITREE_ERROR; 00101 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00102 } 00103 else 00104 { 00105 if (innerChildCount > 0) 00106 { 00107 STRING_HANDLE child = STRING_new(); 00108 if (child == NULL) 00109 { 00110 result = JSON_ENCODER_ERROR; 00111 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00112 } 00113 else 00114 { 00115 if ((result = JSONEncoder_EncodeTree(childTreeHandle, child, toStringFunc)) != JSON_ENCODER_OK) 00116 { 00117 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00118 } 00119 else if (STRING_concat_with_STRING(destination, child)!=0) 00120 { 00121 result = JSON_ENCODER_ERROR; 00122 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00123 } 00124 STRING_delete(child); 00125 } 00126 } 00127 else 00128 { 00129 const void* value; 00130 if (MultiTree_GetValue(childTreeHandle, &value) != MULTITREE_OK) 00131 { 00132 result = JSON_ENCODER_MULTITREE_ERROR; 00133 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00134 00135 } 00136 else 00137 { 00138 STRING_HANDLE childValue = STRING_new(); 00139 if (childValue == NULL) 00140 { 00141 result = JSON_ENCODER_ERROR; 00142 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00143 } 00144 else 00145 { 00146 if (toStringFunc(childValue, value) != JSON_ENCODER_TOSTRING_OK) 00147 { 00148 result = JSON_ENCODER_TOSTRING_FUNCTION_ERROR; 00149 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00150 } 00151 else if (STRING_concat_with_STRING(destination, childValue)!=0) 00152 { 00153 result = JSON_ENCODER_ERROR; 00154 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00155 } 00156 else 00157 { 00158 /*do nothing, result = JSON_ENCODER_OK is set above at the beginning of the FOR loop*/ 00159 } 00160 STRING_delete(childValue); 00161 } 00162 } 00163 } 00164 } 00165 } 00166 STRING_delete(name); 00167 } 00168 } 00169 } 00170 00171 if ((i == childCount) && (result == JSON_ENCODER_OK)) 00172 { 00173 if (STRING_concat(destination, "}") != 0) 00174 { 00175 result = JSON_ENCODER_ERROR; 00176 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_RESULT, result)); 00177 } 00178 else 00179 { 00180 /* Codes_SRS_JSON_ENCODER_99_031:[On success, JSONEncoder_EncodeTree shall return JSON_ENCODER_OK.] */ 00181 result = JSON_ENCODER_OK; 00182 } 00183 } 00184 } 00185 } 00186 00187 return result; 00188 #ifdef _MSC_VER 00189 #pragma warning(disable: 4701) /* potentially uninitialized local variable 'result' used */ /* the scanner cannot track variable "i" and link it to childCount*/ 00190 #endif 00191 } 00192 00193 JSON_ENCODER_TOSTRING_RESULT JSONEncoder_CharPtr_ToString(STRING_HANDLE destination, const void* value) 00194 { 00195 JSON_ENCODER_TOSTRING_RESULT result; 00196 00197 /*Coes_SRS_JSON_ENCODER_99_047:[ JSONEncoder_CharPtr_ToString shall return JSON_ENCODER_TOSTRING_INVALID_ARG if destination or value parameters passed to it are NULL.]*/ 00198 if ((destination == NULL) || 00199 (value == NULL)) 00200 { 00201 result = JSON_ENCODER_TOSTRING_INVALID_ARG; 00202 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_TOSTRING_RESULT, result)); 00203 } 00204 /*Codes_SRS_JSON_ENCODER_99_048:[ JSONEncoder_CharPtr_ToString shall use strcpy_s to copy from value to destination.]*/ 00205 else if (STRING_concat(destination, (const char*)value) != 0) 00206 { 00207 /*Codes_SRS_JSON_ENCODER_99_049:[ If strcpy_s fails then JSONEncoder_CharPtr_ToString shall return JSON_ENCODER_TOSTRING_ERROR.]*/ 00208 result = JSON_ENCODER_TOSTRING_ERROR; 00209 LogError("(result = %s)", ENUM_TO_STRING(JSON_ENCODER_TOSTRING_RESULT, result)); 00210 } 00211 else 00212 { 00213 /*Codes_SRS_JSON_ENCODER_99_050:[ If strcpy_s doesn't fail, then JSONEncoder_CharPtr_ToString shall return JSON_ENCODER_TOSTRING_OK]*/ 00214 result = JSON_ENCODER_TOSTRING_OK; 00215 } 00216 00217 return result; 00218 }
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