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/* |
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* Copyright (c) 2016 Eric Haszlakiewicz |
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* |
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* This is free software; you can redistribute it and/or modify |
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* it under the terms of the MIT license. See COPYING for details. |
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*/ |
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#include <stdio.h> |
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#include "config.h" |
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#include "json_inttypes.h" |
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#include "json_object.h" |
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#include "json_visit.h" |
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#include "linkhash.h" |
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static int _json_c_visit(json_object *jso, json_object *parent_jso, const char *jso_key, |
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size_t *jso_index, json_c_visit_userfunc *userfunc, void *userarg); |
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int json_c_visit(json_object *jso, int future_flags, json_c_visit_userfunc *userfunc, void *userarg) |
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{ |
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int ret = _json_c_visit(jso, NULL, NULL, NULL, userfunc, userarg); |
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switch (ret) |
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{ |
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case JSON_C_VISIT_RETURN_CONTINUE: |
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case JSON_C_VISIT_RETURN_SKIP: |
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case JSON_C_VISIT_RETURN_POP: |
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case JSON_C_VISIT_RETURN_STOP: return 0; |
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default: return JSON_C_VISIT_RETURN_ERROR; |
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} |
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} |
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static int _json_c_visit(json_object *jso, json_object *parent_jso, const char *jso_key, |
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size_t *jso_index, json_c_visit_userfunc *userfunc, void *userarg) |
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{ |
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int userret = userfunc(jso, 0, parent_jso, jso_key, jso_index, userarg); |
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switch (userret) |
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{ |
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case JSON_C_VISIT_RETURN_CONTINUE: break; |
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case JSON_C_VISIT_RETURN_SKIP: |
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case JSON_C_VISIT_RETURN_POP: |
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case JSON_C_VISIT_RETURN_STOP: |
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case JSON_C_VISIT_RETURN_ERROR: return userret; |
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default: |
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fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", |
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userret); |
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return JSON_C_VISIT_RETURN_ERROR; |
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} |
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switch (json_object_get_type(jso)) |
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{ |
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case json_type_null: |
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case json_type_boolean: |
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case json_type_double: |
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case json_type_int: |
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case json_type_string: |
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// we already called userfunc above, move on to the next object |
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return JSON_C_VISIT_RETURN_CONTINUE; |
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case json_type_object: |
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{ |
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json_object_object_foreach(jso, key, child) |
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{ |
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userret = _json_c_visit(child, jso, key, NULL, userfunc, userarg); |
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if (userret == JSON_C_VISIT_RETURN_POP) |
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break; |
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if (userret == JSON_C_VISIT_RETURN_STOP || |
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userret == JSON_C_VISIT_RETURN_ERROR) |
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return userret; |
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if (userret != JSON_C_VISIT_RETURN_CONTINUE && |
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userret != JSON_C_VISIT_RETURN_SKIP) |
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{ |
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fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", |
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userret); |
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return JSON_C_VISIT_RETURN_ERROR; |
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} |
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} |
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break; |
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} |
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case json_type_array: |
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{ |
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size_t array_len = json_object_array_length(jso); |
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size_t ii; |
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for (ii = 0; ii < array_len; ii++) |
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{ |
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json_object *child = json_object_array_get_idx(jso, ii); |
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userret = _json_c_visit(child, jso, NULL, &ii, userfunc, userarg); |
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if (userret == JSON_C_VISIT_RETURN_POP) |
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break; |
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if (userret == JSON_C_VISIT_RETURN_STOP || |
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userret == JSON_C_VISIT_RETURN_ERROR) |
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return userret; |
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if (userret != JSON_C_VISIT_RETURN_CONTINUE && |
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userret != JSON_C_VISIT_RETURN_SKIP) |
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{ |
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fprintf(stderr, "INTERNAL ERROR: _json_c_visit returned %d\n", |
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userret); |
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return JSON_C_VISIT_RETURN_ERROR; |
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} |
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} |
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break; |
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} |
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default: |
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fprintf(stderr, "INTERNAL ERROR: _json_c_visit found object of unknown type: %d\n", |
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json_object_get_type(jso)); |
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return JSON_C_VISIT_RETURN_ERROR; |
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} |
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// Call userfunc for the second type on container types, after all |
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// members of the container have been visited. |
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// Non-container types will have already returned before this point. |
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userret = userfunc(jso, JSON_C_VISIT_SECOND, parent_jso, jso_key, jso_index, userarg); |
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switch (userret) |
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{ |
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case JSON_C_VISIT_RETURN_SKIP: |
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case JSON_C_VISIT_RETURN_POP: |
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// These are not really sensible during JSON_C_VISIT_SECOND, |
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// but map them to JSON_C_VISIT_CONTINUE anyway. |
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// FALLTHROUGH |
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case JSON_C_VISIT_RETURN_CONTINUE: return JSON_C_VISIT_RETURN_CONTINUE; |
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case JSON_C_VISIT_RETURN_STOP: |
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case JSON_C_VISIT_RETURN_ERROR: return userret; |
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default: |
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fprintf(stderr, "ERROR: invalid return value from json_c_visit userfunc: %d\n", |
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userret); |
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return JSON_C_VISIT_RETURN_ERROR; |
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} |
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// NOTREACHED |
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} |
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