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This patch can be viewed as combination of two parts: 1) Enabling '-' in the path so that the parser does not give out a warning. 2) Setting the negative index to a correct value and returning the appropriate value. 1) To enable using the negative index in the path: To make the parser not return warning when negative index is used in path '-' needs to be allowed in json path characters. P_NEG is added to enable this and is made recognizable by setting the 45th index of json_path_chr_map[] to P_NEG (instead of previous P_ETC) because 45 corresponds to '-' in unicode. When the path is being parsed and '-' is encountered, the parser should recognize it as parsing '-' sign, so a new json state PS_NEG is required. When the state is PS_NEG, it means that a negative integer is going to be parsed so set is_negative_index of current step to 1 and n_item is set accordingly when integer is encountered after '-'. Next proceed with parsing rest of the path and get the correct path. Next thing is parsing the json and returning correct value. 2) Setting the negative index to a correct value and returning the value: While parsing json if we encounter array and the path step for the array is a negative index (n_item < 0), then we can count the number of elements in the array and set n_item to correct corresponding value. This is done in json_skip_array_and_count. |
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| .. | ||
| CMakeLists.txt | ||
| json_lib-t.c | ||
| json_normalize-t.c | ||