2 Copyright (C) 2005 Georgia Public Library Service
3 Bill Erickson <highfalutin@gmail.com>
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
18 #include "json_parser.h"
23 /* ---------------------------------------------------------------------- */
24 /* See object.h for function info */
25 /* ---------------------------------------------------------------------- */
29 /* number, double, and 'null' parsing... */
30 object* num = json_parse_string("1");
31 printf("\nParsed number: %d\n", num->num_value);
33 num = json_parse_string("1.1");
34 printf("\nDouble number: %lf\n", num->double_value);
37 object* null = json_parse_string("nUlL");
38 char* n = null->to_json(null);
40 printf("\nJSON Null: %s\n", n);
43 object* mix = json_parse_string("[1, .5, null]");
44 char* m = mix->to_json(mix);
45 printf("\nJSON MIX: %s\n", m );
49 /* simulate an error.. */
50 printf("\nShould print error msg: \n");
51 object* error = json_parse_string("[1, .5. null]");
56 /* sample JSON string with some encoded UTF8 */
57 char* jsons = "/*--S mvr--*/[null,null,null,\"Griswold del Castillo, Richard\",[],null,\"1405676\",null,null,\"1558853243 (alk. paper) :\",\"c2002\",\"Pin\\u0303ata Books\",null,[],[[\"Chavez, Cesar 1927-\",\"Juvenile literature\"],[\"Labor leaders\",\"United States\",\"Biography\",\"Juvenile literature\"],[\"Mexican Americans\",\"Biography\",\"Juvenile literature\"],[\"Agricultural laborers\",\"Labor unions\",\"United States\",\"History\",\"Juvenile literature\"],[\"United Farm Workers\",\"History\",\"Juvenile literature\"],[\"Chavez, Cesar 1927-\"],[\"Labor leaders\"],[\"Mexican Americans\",\"Biography\"],[\"United Farm Workers.\"],[\"Spanish language materials\",\"Bilingual\"],[\"Chavez, Cesar 1927-\",\"Literatura juvenil\"],[\"Li\\u0301deres obreros\",\"Estados Unidos\",\"Biografi\\u0301a\",\"Literatura juvenil\"],[\"Mexicano-americanos\",\"Biografi\\u0301a\",\"Literatura juvenil\"],[\"Sindicatos\",\"Trabajadores agri\\u0301colas\",\"Estados Unidos\",\"Historia\",\"Literatura juvenil\"],[\"Unio\\u0301n de Trabajadores Agri\\u0301colas\",\"Historia\",\"Literatura juvenil\"]],\"ocm48083852 \",\"Ce\\u0301sar Cha\\u0301vez : the struggle for justice = Ce\\u0301sar Cha\\u0301vez : la lucha por la justicia\",[\"text\"], { \"hi\":\"you\"} ]/*--E mvr--*/";
60 printf("\nOriginal JSON\n%s\n", jsons);
62 /* parse the JSON string */
63 object* yuk = json_parse_string(jsons);
65 /* grab the class name from the object */
66 printf("\nParsed object with class %s\n", yuk->classname );
68 /* turn the resulting object back into JSON */
69 char* ccc = yuk->to_json(yuk);
71 /* extract a sub-object from the object and print its data*/
72 object* o = yuk->get_index(yuk, 11);
73 printf("\nRandom unicode string => %s\n", o->string_data);
75 /* parse the new JSON string to build yet another object */
76 object* yuk2 = json_parse_string(ccc);
78 /* turn that one back into JSON and print*/
79 char* cccc = yuk2->to_json(yuk2);
80 printf("\nFinal JSON: \n%s\n", cccc);
82 char* string2 = strdup(jsons);
86 printf("\nParsing %d round trips at %f...\n", count, get_timestamp_millis());
88 /* parse and stringify many times in a loop to check speed */
91 object* o = json_parse_string(string2);
93 string2 = o->to_json(o);
97 fprintf(stderr, "Round trip at %d\n", x);
100 printf("After Loop: %f\n", get_timestamp_millis());
103 /* to_json() generates a string that must be freed by the caller */
108 /* only free the top level objects. objects that are 'children'
109 of other objects should not be freed */
115 /* ------------------------------------------------------------------------ */
117 /* parse a big JSON file */
118 FILE* F = fopen("test.json", "r");
120 perror("unable to open test.json for testing");
127 bzero(smallbuf, 512);
129 while(fgets(smallbuf, 512, F))
130 strcat(buf, smallbuf);
132 /* dig our way into the JSON object we parsed, see test.json to get
133 an idea of the object structure */
134 object* big = json_parse_string(buf);
135 object* k = big->get_key(big,"web-app");
136 object* k2 = k->get_key(k,"servlet");
137 object* k3 = k2->get_index(k2, 0);
138 object* k4 = k3->get_key(k3,"servlet-class");
140 printf("\nValue for object with key 'servlet-class' in the JSON file => %s\n", k4->get_string(k4));