[453] | 1 | // Copyright (c) Microsoft. All rights reserved.
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| 2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information.
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| 3 |
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| 4 | #include "azure_c_shared_utility/gballoc.h"
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| 5 | #include "azure_c_shared_utility/crt_abstractions.h"
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| 6 |
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| 7 | #include "jsondecoder.h"
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| 8 | #include <stdio.h>
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| 9 | #include <string.h>
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| 10 | #include <ctype.h>
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| 11 | #include <stddef.h>
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| 12 |
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| 13 | #define IsWhiteSpace(A) (((A) == 0x20) || ((A) == 0x09) || ((A) == 0x0A) || ((A) == 0x0D))
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| 14 |
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| 15 | typedef struct PARSER_STATE_TAG
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| 16 | {
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| 17 | char* json;
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| 18 | } PARSER_STATE;
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| 19 |
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| 20 | static JSON_DECODER_RESULT ParseArray(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode);
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| 21 | static JSON_DECODER_RESULT ParseObject(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode);
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| 22 |
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| 23 | /* Codes_SRS_JSON_DECODER_99_049:[ JSONDecoder shall not allocate new string values for the leafs, but rather point to strings in the original JSON.] */
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| 24 | static void NoFreeFunction(void* value)
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| 25 | {
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| 26 | (void)value;
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| 27 | }
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| 28 |
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| 29 | static int NOPCloneFunction(void** destination, const void* source)
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| 30 | {
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| 31 | *destination = (void**)source;
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| 32 | return 0;
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| 33 | }
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| 34 |
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| 35 | void SkipWhiteSpaces(PARSER_STATE* parserState)
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| 36 | {
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| 37 | while ((*(parserState->json) != '\0') && IsWhiteSpace(*(parserState->json)))
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| 38 | {
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| 39 | parserState->json++;
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| 40 | }
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| 41 | }
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| 42 |
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| 43 | static JSON_DECODER_RESULT ParseString(PARSER_STATE* parserState, char** stringBegin)
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| 44 | {
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| 45 | JSON_DECODER_RESULT result = JSON_DECODER_OK;
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| 46 | *stringBegin = parserState->json;
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| 47 |
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| 48 | /* Codes_SRS_JSON_DECODER_99_028:[ A string begins and ends with quotation marks.] */
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| 49 | if (*(parserState->json) != '"')
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| 50 | {
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| 51 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 52 | result = JSON_DECODER_PARSE_ERROR;
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| 53 | }
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| 54 | else
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| 55 | {
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| 56 | parserState->json++;
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| 57 | while ((*(parserState->json) != '"') && (*(parserState->json) != '\0'))
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| 58 | {
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| 59 | /* Codes_SRS_JSON_DECODER_99_030:[ Any character may be escaped.] */
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| 60 | /* Codes_SRS_JSON_DECODER_99_033:[ Alternatively, there are two-character sequence escape representations of some popular characters. So, for example, a string containing only a single reverse solidus character may be represented more compactly as "\\".] */
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| 61 | if (*(parserState->json) == '\\')
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| 62 | {
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| 63 | parserState->json++;
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| 64 | if (
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| 65 | /* Codes_SRS_JSON_DECODER_99_051:[ %x5C / ; \ reverse solidus U+005C] */
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| 66 | (*parserState->json == '\\') ||
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| 67 | /* Codes_SRS_JSON_DECODER_99_050:[ %x22 / ; " quotation mark U+0022] */
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| 68 | (*parserState->json == '"') ||
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| 69 | /* Codes_SRS_JSON_DECODER_99_052:[ %x2F / ; / solidus U+002F] */
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| 70 | (*parserState->json == '/') ||
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| 71 | /* Codes_SRS_JSON_DECODER_99_053:[ %x62 / ; b backspace U+0008] */
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| 72 | (*parserState->json == 'b') ||
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| 73 | /* Codes_SRS_JSON_DECODER_99_054:[ %x66 / ; f form feed U+000C] */
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| 74 | (*parserState->json == 'f') ||
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| 75 | /* Codes_SRS_JSON_DECODER_99_055:[ %x6E / ; n line feed U+000A] */
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| 76 | (*parserState->json == 'n') ||
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| 77 | /* Codes_SRS_JSON_DECODER_99_056:[ %x72 / ; r carriage return U+000D] */
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| 78 | (*parserState->json == 'r') ||
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| 79 | /* Codes_SRS_JSON_DECODER_99_057:[ %x74 / ; t tab U+0009] */
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| 80 | (*parserState->json == 't'))
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| 81 | {
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| 82 | parserState->json++;
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| 83 | }
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| 84 | else
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| 85 | {
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| 86 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 87 | result = JSON_DECODER_PARSE_ERROR;
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| 88 | break;
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| 89 | }
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| 90 | }
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| 91 | else
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| 92 | {
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| 93 | parserState->json++;
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| 94 | }
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| 95 | }
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| 96 |
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| 97 | if (*(parserState->json) != '"')
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| 98 | {
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| 99 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 100 | result = JSON_DECODER_PARSE_ERROR;
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| 101 | }
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| 102 | else
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| 103 | {
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| 104 | parserState->json++;
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| 105 | result = JSON_DECODER_OK;
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| 106 | }
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| 107 | }
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| 108 |
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| 109 | return result;
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| 110 | }
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| 111 |
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| 112 | static JSON_DECODER_RESULT ParseNumber(PARSER_STATE* parserState)
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| 113 | {
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| 114 | JSON_DECODER_RESULT result = JSON_DECODER_OK;
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| 115 | size_t digitCount = 0;
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| 116 |
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| 117 | if (*(parserState->json) == '-')
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| 118 | {
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| 119 | parserState->json++;
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| 120 | }
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| 121 |
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| 122 | /* Codes_SRS_JSON_DECODER_99_043:[ A number contains an integer component that may be prefixed with an optional minus sign, which may be followed by a fraction part and/or an exponent part.] */
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| 123 | while (*(parserState->json) != '\0')
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| 124 | {
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| 125 | /* Codes_SRS_JSON_DECODER_99_044:[ Octal and hex forms are not allowed.] */
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| 126 | if (ISDIGIT(*(parserState->json)))
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| 127 | {
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| 128 | digitCount++;
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| 129 | /* simply continue */
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| 130 | }
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| 131 | else
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| 132 | {
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| 133 | break;
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| 134 | }
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| 135 |
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| 136 | parserState->json++;
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| 137 | }
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| 138 |
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| 139 | if ((digitCount == 0) ||
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| 140 | /* Codes_SRS_JSON_DECODER_99_045:[ Leading zeros are not allowed.] */
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| 141 | ((digitCount > 1) && *(parserState->json - digitCount) == '0'))
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| 142 | {
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| 143 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 144 | result = JSON_DECODER_PARSE_ERROR;
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| 145 | }
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| 146 | else
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| 147 | {
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| 148 | /* Codes_SRS_JSON_DECODER_99_046:[ A fraction part is a decimal point followed by one or more digits.] */
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| 149 | if (*(parserState->json) == '.')
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| 150 | {
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| 151 | /* optional fractional part */
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| 152 | parserState->json++;
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| 153 | digitCount = 0;
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| 154 |
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| 155 | while (*(parserState->json) != '\0')
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| 156 | {
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| 157 | /* Codes_SRS_JSON_DECODER_99_044:[ Octal and hex forms are not allowed.] */
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| 158 | if (ISDIGIT(*(parserState->json)))
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| 159 | {
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| 160 | digitCount++;
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| 161 | /* simply continue */
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| 162 | }
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| 163 | else
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| 164 | {
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| 165 | break;
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| 166 | }
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| 167 |
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| 168 | parserState->json++;
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| 169 | }
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| 170 |
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| 171 | if (digitCount == 0)
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| 172 | {
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| 173 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 174 | result = JSON_DECODER_PARSE_ERROR;
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | /* Codes_SRS_JSON_DECODER_99_047:[ An exponent part begins with the letter E in upper or lowercase, which may be followed by a plus or minus sign.] */
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| 179 | if ((*(parserState->json) == 'e') || (*(parserState->json) == 'E'))
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| 180 | {
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| 181 | parserState->json++;
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| 182 |
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| 183 | /* optional sign */
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| 184 | if ((*(parserState->json) == '-') || (*(parserState->json) == '+'))
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| 185 | {
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| 186 | parserState->json++;
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| 187 | }
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| 188 |
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| 189 | digitCount = 0;
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| 190 |
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| 191 | /* Codes_SRS_JSON_DECODER_99_048:[ The E and optional sign are followed by one or more digits.] */
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| 192 | while (*(parserState->json) != '\0')
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| 193 | {
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| 194 | /* Codes_SRS_JSON_DECODER_99_044:[ Octal and hex forms are not allowed.] */
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| 195 | if (ISDIGIT(*(parserState->json)))
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| 196 | {
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| 197 | digitCount++;
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| 198 | /* simply continue */
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| 199 | }
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| 200 | else
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| 201 | {
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| 202 | break;
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| 203 | }
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| 204 |
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| 205 | parserState->json++;
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| 206 | }
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| 207 |
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| 208 | if (digitCount == 0)
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| 209 | {
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| 210 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 211 | result = JSON_DECODER_PARSE_ERROR;
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| 212 | }
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| 213 | }
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| 214 | }
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| 215 |
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| 216 | return result;
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| 217 | }
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| 218 |
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| 219 | static JSON_DECODER_RESULT ParseValue(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode, char** stringBegin)
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| 220 | {
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| 221 | JSON_DECODER_RESULT result;
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| 222 |
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| 223 | SkipWhiteSpaces(parserState);
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| 224 |
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| 225 | if (*(parserState->json) == '"')
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| 226 | {
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| 227 | result = ParseString(parserState, stringBegin);
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| 228 | }
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| 229 | /* Codes_SRS_JSON_DECODER_99_018:[ A JSON value MUST be an object, array, number, or string, or one of the following three literal names: false null true] */
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| 230 | /* Codes_SRS_JSON_DECODER_99_019:[ The literal names MUST be lowercase.] */
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| 231 | /* Codes_SRS_JSON_DECODER_99_020:[ No other literal names are allowed.] */
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| 232 | else if (strncmp(parserState->json, "false", 5) == 0)
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| 233 | {
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| 234 | *stringBegin = parserState->json;
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| 235 | parserState->json += 5;
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| 236 | result = JSON_DECODER_OK;
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| 237 | }
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| 238 | else if (strncmp(parserState->json, "true", 4) == 0)
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| 239 | {
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| 240 | *stringBegin = parserState->json;
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| 241 | parserState->json += 4;
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| 242 | result = JSON_DECODER_OK;
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| 243 | }
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| 244 | else if (strncmp(parserState->json, "null", 4) == 0)
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| 245 | {
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| 246 | *stringBegin = parserState->json;
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| 247 | parserState->json += 4;
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| 248 | result = JSON_DECODER_OK;
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| 249 | }
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| 250 | /* Tests_SRS_JSON_DECODER_99_018:[ A JSON value MUST be an object, array, number, or string, or one of the following three literal names: false null true] */
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| 251 | else if (*(parserState->json) == '[')
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| 252 | {
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| 253 | result = ParseArray(parserState, currentNode);
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| 254 | *stringBegin = NULL;
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| 255 | }
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| 256 | else if (*(parserState->json) == '{')
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| 257 | {
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| 258 | result = ParseObject(parserState, currentNode);
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| 259 | *stringBegin = NULL;
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| 260 | }
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| 261 | else if (
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| 262 | (
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| 263 | ISDIGIT(*(parserState->json))
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| 264 | )
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| 265 | || (*(parserState->json) == '-'))
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| 266 | {
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| 267 | *stringBegin = parserState->json;
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| 268 | result = ParseNumber(parserState);
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| 269 | }
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| 270 | else
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| 271 | {
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| 272 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 273 | result = JSON_DECODER_PARSE_ERROR;
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| 274 | }
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| 275 |
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| 276 | return result;
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| 277 | }
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| 278 |
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| 279 | static JSON_DECODER_RESULT ParseColon(PARSER_STATE* parserState)
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| 280 | {
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| 281 | JSON_DECODER_RESULT result;
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| 282 |
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| 283 | SkipWhiteSpaces(parserState);
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| 284 | /* Codes_SRS_JSON_DECODER_99_023:[ A single colon comes after each name, separating the name from the value.] */
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| 285 | if (*(parserState->json) != ':')
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| 286 | {
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| 287 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 288 | result = JSON_DECODER_PARSE_ERROR;
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| 289 | }
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| 290 | else
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| 291 | {
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| 292 | parserState->json++;
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| 293 | result = JSON_DECODER_OK;
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| 294 | }
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| 295 |
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| 296 | return result;
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| 297 | }
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| 298 |
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| 299 | static JSON_DECODER_RESULT ParseOpenCurly(PARSER_STATE* parserState)
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| 300 | {
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| 301 | JSON_DECODER_RESULT result = JSON_DECODER_OK;
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| 302 |
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| 303 | SkipWhiteSpaces(parserState);
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| 304 |
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| 305 | /* Codes_SRS_JSON_DECODER_99_021:[ An object structure is represented as a pair of curly brackets surrounding zero or more name/value pairs (or members).] */
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| 306 | if (*(parserState->json) != '{')
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| 307 | {
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| 308 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
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| 309 | result = JSON_DECODER_PARSE_ERROR;
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| 310 | }
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| 311 | else
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| 312 | {
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| 313 | parserState->json++;
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| 314 | result = JSON_DECODER_OK;
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| 315 | }
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| 316 |
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| 317 | return result;
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| 318 | }
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| 319 |
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| 320 | static JSON_DECODER_RESULT ParseNameValuePair(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode)
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| 321 | {
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| 322 | JSON_DECODER_RESULT result;
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| 323 | char* memberNameBegin;
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| 324 |
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| 325 | SkipWhiteSpaces(parserState);
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| 326 |
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| 327 | /* Codes_SRS_JSON_DECODER_99_022:[ A name is a string.] */
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| 328 | result = ParseString(parserState, &memberNameBegin);
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| 329 | if (result == JSON_DECODER_OK)
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| 330 | {
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| 331 | char* valueBegin;
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| 332 | MULTITREE_HANDLE childNode;
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| 333 | *(parserState->json - 1) = 0;
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| 334 |
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| 335 | result = ParseColon(parserState);
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| 336 | if (result == JSON_DECODER_OK)
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| 337 | {
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| 338 | /* Codes_SRS_JSON_DECODER_99_025:[ The names within an object SHOULD be unique.] */
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| 339 | /* Multi Tree takes care of not having 2 children with the same name */
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| 340 | /* Codes_SRS_JSON_DECODER_99_002:[ JSONDecoder_JSON_To_MultiTree shall use the MultiTree APIs to create the multi tree and add leafs to the multi tree.] */
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| 341 | /* Codes_SRS_JSON_DECODER_99_003:[ When a JSON element is decoded from the JSON object then a leaf shall be added to the MultiTree.] */
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| 342 | /* Codes_SRS_JSON_DECODER_99_004:[ The leaf node name in the multi tree shall be the JSON element name.] */
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| 343 | if (MultiTree_AddChild(currentNode, memberNameBegin + 1, &childNode) != MULTITREE_OK)
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| 344 | {
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| 345 | /* Codes_SRS_JSON_DECODER_99_038:[ If any MultiTree API fails, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_MULTITREE_FAILED.] */
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| 346 | result = JSON_DECODER_MULTITREE_FAILED;
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| 347 | }
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| 348 | else
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| 349 | {
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| 350 | result = ParseValue(parserState, childNode, &valueBegin);
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| 351 | if ((result == JSON_DECODER_OK) && (valueBegin != NULL))
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| 352 | {
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| 353 | /* Codes_SRS_JSON_DECODER_99_005:[ The leaf node added in the multi tree shall have the value the string value of the JSON element as parsed from the JSON object.] */
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| 354 | if (MultiTree_SetValue(childNode, valueBegin) != MULTITREE_OK)
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| 355 | {
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| 356 | /* Codes_SRS_JSON_DECODER_99_038:[ If any MultiTree API fails, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_MULTITREE_FAILED.] */
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| 357 | result = JSON_DECODER_MULTITREE_FAILED;
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| 358 | }
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| 359 | }
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| 360 | }
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| 361 | }
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| 362 | }
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| 363 |
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| 364 | return result;
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| 365 | }
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| 366 |
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| 367 | static JSON_DECODER_RESULT ParseObject(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode)
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| 368 | {
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| 369 | JSON_DECODER_RESULT result = ParseOpenCurly(parserState);
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| 370 | if (result == JSON_DECODER_OK)
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| 371 | {
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| 372 | char jsonChar;
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| 373 |
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| 374 | SkipWhiteSpaces(parserState);
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| 375 |
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| 376 | jsonChar = *(parserState->json);
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| 377 | while ((jsonChar != '}') && (jsonChar != '\0'))
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| 378 | {
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| 379 | char* valueEnd;
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| 380 |
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| 381 | /* decode each value */
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| 382 | result = ParseNameValuePair(parserState, currentNode);
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| 383 | if (result != JSON_DECODER_OK)
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| 384 | {
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| 385 | break;
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| 386 | }
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| 387 |
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| 388 | valueEnd = parserState->json;
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| 389 |
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| 390 | SkipWhiteSpaces(parserState);
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| 391 | jsonChar = *(parserState->json);
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| 392 | *valueEnd = 0;
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| 393 |
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| 394 | /* Codes_SRS_JSON_DECODER_99_024:[ A single comma separates a value from a following name.] */
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| 395 | if (jsonChar == ',')
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| 396 | {
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| 397 | parserState->json++;
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| 398 | /* get the next name/value pair */
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| 399 | }
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| 400 | }
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| 401 |
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| 402 | if (result != JSON_DECODER_OK)
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| 403 | {
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| 404 | /* already have error */
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| 405 | }
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| 406 | else
|
---|
| 407 | {
|
---|
| 408 | if (jsonChar != '}')
|
---|
| 409 | {
|
---|
| 410 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 411 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 412 | }
|
---|
| 413 | else
|
---|
| 414 | {
|
---|
| 415 | parserState->json++;
|
---|
| 416 | }
|
---|
| 417 | }
|
---|
| 418 | }
|
---|
| 419 |
|
---|
| 420 | return result;
|
---|
| 421 | }
|
---|
| 422 |
|
---|
| 423 | static JSON_DECODER_RESULT ParseArray(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode)
|
---|
| 424 | {
|
---|
| 425 | JSON_DECODER_RESULT result = JSON_DECODER_OK;
|
---|
| 426 |
|
---|
| 427 | SkipWhiteSpaces(parserState);
|
---|
| 428 |
|
---|
| 429 | /* Codes_SRS_JSON_DECODER_99_026:[ An array structure is represented as square brackets surrounding zero or more values (or elements).] */
|
---|
| 430 | if (*(parserState->json) != '[')
|
---|
| 431 | {
|
---|
| 432 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 433 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 434 | }
|
---|
| 435 | else
|
---|
| 436 | {
|
---|
| 437 | char* stringBegin;
|
---|
| 438 | char jsonChar;
|
---|
| 439 | int arrayIndex = 0;
|
---|
| 440 | result = JSON_DECODER_OK;
|
---|
| 441 |
|
---|
| 442 | parserState->json++;
|
---|
| 443 |
|
---|
| 444 | SkipWhiteSpaces(parserState);
|
---|
| 445 |
|
---|
| 446 | jsonChar = *parserState->json;
|
---|
| 447 | while ((jsonChar != ']') && (jsonChar != '\0'))
|
---|
| 448 | {
|
---|
| 449 | char arrayIndexStr[22];
|
---|
| 450 | MULTITREE_HANDLE childNode;
|
---|
| 451 |
|
---|
| 452 | /* Codes_SRS_JSON_DECODER_99_039:[ For array elements the multi tree node name shall be the string representation of the array index.] */
|
---|
| 453 | if (sprintf(arrayIndexStr, "%d", arrayIndex++) < 0)
|
---|
| 454 | {
|
---|
| 455 | result = JSON_DECODER_ERROR;
|
---|
| 456 | break;
|
---|
| 457 | }
|
---|
| 458 | /* Codes_SRS_JSON_DECODER_99_003:[ When a JSON element is decoded from the JSON object then a leaf shall be added to the MultiTree.] */
|
---|
| 459 | else if (MultiTree_AddChild(currentNode, arrayIndexStr, &childNode) != MULTITREE_OK)
|
---|
| 460 | {
|
---|
| 461 | /* Codes_SRS_JSON_DECODER_99_038:[ If any MultiTree API fails, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_MULTITREE_FAILED.] */
|
---|
| 462 | result = JSON_DECODER_MULTITREE_FAILED;
|
---|
| 463 | }
|
---|
| 464 | else
|
---|
| 465 | {
|
---|
| 466 | char* valueEnd;
|
---|
| 467 |
|
---|
| 468 | /* decode each value */
|
---|
| 469 | result = ParseValue(parserState, childNode, &stringBegin);
|
---|
| 470 | if (result != JSON_DECODER_OK)
|
---|
| 471 | {
|
---|
| 472 | break;
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | if (stringBegin != NULL)
|
---|
| 476 | {
|
---|
| 477 | /* Codes_SRS_JSON_DECODER_99_005:[ The leaf node added in the multi tree shall have the value the string value of the JSON element as parsed from the JSON object.] */
|
---|
| 478 | if (MultiTree_SetValue(childNode, stringBegin) != MULTITREE_OK)
|
---|
| 479 | {
|
---|
| 480 | /* Codes_SRS_JSON_DECODER_99_038:[ If any MultiTree API fails, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_MULTITREE_FAILED.] */
|
---|
| 481 | result = JSON_DECODER_MULTITREE_FAILED;
|
---|
| 482 | break;
|
---|
| 483 | }
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | valueEnd = parserState->json;
|
---|
| 487 |
|
---|
| 488 | SkipWhiteSpaces(parserState);
|
---|
| 489 | jsonChar = *(parserState->json);
|
---|
| 490 | *valueEnd = 0;
|
---|
| 491 |
|
---|
| 492 | /* Codes_SRS_JSON_DECODER_99_027:[ Elements are separated by commas.] */
|
---|
| 493 | if (jsonChar == ',')
|
---|
| 494 | {
|
---|
| 495 | parserState->json++;
|
---|
| 496 | /* get the next value pair */
|
---|
| 497 | }
|
---|
| 498 | else if (jsonChar == ']')
|
---|
| 499 | {
|
---|
| 500 | break;
|
---|
| 501 | }
|
---|
| 502 | else
|
---|
| 503 | {
|
---|
| 504 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 505 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 506 | break;
|
---|
| 507 | }
|
---|
| 508 | }
|
---|
| 509 | }
|
---|
| 510 |
|
---|
| 511 | if (result != JSON_DECODER_OK)
|
---|
| 512 | {
|
---|
| 513 | /* already have error */
|
---|
| 514 | }
|
---|
| 515 | else
|
---|
| 516 | {
|
---|
| 517 | if (jsonChar != ']')
|
---|
| 518 | {
|
---|
| 519 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 520 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 521 | }
|
---|
| 522 | else
|
---|
| 523 | {
|
---|
| 524 | parserState->json++;
|
---|
| 525 | SkipWhiteSpaces(parserState);
|
---|
| 526 | }
|
---|
| 527 | }
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | return result;
|
---|
| 531 | }
|
---|
| 532 |
|
---|
| 533 | /* Codes_SRS_JSON_DECODER_99_012:[ A JSON text is a serialized object or array.] */
|
---|
| 534 | static JSON_DECODER_RESULT ParseObjectOrArray(PARSER_STATE* parserState, MULTITREE_HANDLE currentNode)
|
---|
| 535 | {
|
---|
| 536 | JSON_DECODER_RESULT result = JSON_DECODER_PARSE_ERROR;
|
---|
| 537 |
|
---|
| 538 | SkipWhiteSpaces(parserState);
|
---|
| 539 |
|
---|
| 540 | if (*(parserState->json) == '{')
|
---|
| 541 | {
|
---|
| 542 | result = ParseObject(parserState, currentNode);
|
---|
| 543 | SkipWhiteSpaces(parserState);
|
---|
| 544 | }
|
---|
| 545 | else if (*(parserState->json) == '[')
|
---|
| 546 | {
|
---|
| 547 | result = ParseArray(parserState, currentNode);
|
---|
| 548 | SkipWhiteSpaces(parserState);
|
---|
| 549 | }
|
---|
| 550 | else
|
---|
| 551 | {
|
---|
| 552 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 553 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 | if ((result == JSON_DECODER_OK) &&
|
---|
| 557 | (*(parserState->json) != '\0'))
|
---|
| 558 | {
|
---|
| 559 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 560 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | return result;
|
---|
| 564 | }
|
---|
| 565 |
|
---|
| 566 | static JSON_DECODER_RESULT ParseJSON(char* json, MULTITREE_HANDLE currentNode)
|
---|
| 567 | {
|
---|
| 568 | /* Codes_SRS_JSON_DECODER_99_009:[ On success, JSONDecoder_JSON_To_MultiTree shall return a handle to the multi tree it created in the multiTreeHandle argument and it shall return JSON_DECODER_OK.] */
|
---|
| 569 | PARSER_STATE parseState;
|
---|
| 570 | parseState.json = json;
|
---|
| 571 | return ParseObjectOrArray(&parseState, currentNode);
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | JSON_DECODER_RESULT JSONDecoder_JSON_To_MultiTree(char* json, MULTITREE_HANDLE* multiTreeHandle)
|
---|
| 575 | {
|
---|
| 576 | JSON_DECODER_RESULT result;
|
---|
| 577 |
|
---|
| 578 | if ((json == NULL) ||
|
---|
| 579 | (multiTreeHandle == NULL))
|
---|
| 580 | {
|
---|
| 581 | /* Codes_SRS_JSON_DECODER_99_001:[ If any of the parameters passed to the JSONDecoder_JSON_To_MultiTree function is NULL then the function call shall return JSON_DECODER_INVALID_ARG.] */
|
---|
| 582 | result = JSON_DECODER_INVALID_ARG;
|
---|
| 583 | }
|
---|
| 584 | else if (*json == '\0')
|
---|
| 585 | {
|
---|
| 586 | /* Codes_SRS_JSON_DECODER_99_007:[ If parsing the JSON fails due to the JSON string being malformed, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_PARSE_ERROR.] */
|
---|
| 587 | result = JSON_DECODER_PARSE_ERROR;
|
---|
| 588 | }
|
---|
| 589 | else
|
---|
| 590 | {
|
---|
| 591 | /* Codes_SRS_JSON_DECODER_99_008:[ JSONDecoder_JSON_To_MultiTree shall create a multi tree based on the json string argument.] */
|
---|
| 592 | /* Codes_SRS_JSON_DECODER_99_002:[ JSONDecoder_JSON_To_MultiTree shall use the MultiTree APIs to create the multi tree and add leafs to the multi tree.] */
|
---|
| 593 | /* Codes_SRS_JSON_DECODER_99_009:[ On success, JSONDecoder_JSON_To_MultiTree shall return a handle to the multi tree it created in the multiTreeHandle argument and it shall return JSON_DECODER_OK.] */
|
---|
| 594 | *multiTreeHandle = MultiTree_Create(NOPCloneFunction, NoFreeFunction);
|
---|
| 595 | if (*multiTreeHandle == NULL)
|
---|
| 596 | {
|
---|
| 597 | /* Codes_SRS_JSON_DECODER_99_038:[ If any MultiTree API fails, JSONDecoder_JSON_To_MultiTree shall return JSON_DECODER_MULTITREE_FAILED.] */
|
---|
| 598 | result = JSON_DECODER_MULTITREE_FAILED;
|
---|
| 599 | }
|
---|
[459] | 600 | else if (strcmp(json, "null") == 0) {
|
---|
| 601 | result = JSON_DECODER_OK;
|
---|
| 602 | }
|
---|
[453] | 603 | else
|
---|
| 604 | {
|
---|
| 605 | result = ParseJSON(json, *multiTreeHandle);
|
---|
| 606 | if (result != JSON_DECODER_OK)
|
---|
| 607 | {
|
---|
| 608 | MultiTree_Destroy(*multiTreeHandle);
|
---|
| 609 | }
|
---|
| 610 | }
|
---|
| 611 | }
|
---|
| 612 |
|
---|
| 613 | return result;
|
---|
| 614 | }
|
---|