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 printf("------------------------------------------------------------------\n");
31 object* o = json_parse_string("1");
32 printf("\nParsed number: %ld\n", o->num_value);
35 printf("------------------------------------------------------------------\n");
36 o = json_parse_string("1.1");
37 printf("\nDouble number: %lf\n", o->double_value);
40 printf("------------------------------------------------------------------\n");
41 o = json_parse_string("nUlL");
42 char* s = o->to_json(o);
45 printf("\nJSON Null: %s\n", s);
48 printf("------------------------------------------------------------------\n");
49 o = json_parse_string("[1, .5, null]");
51 printf("\nJSON MIX: %s\n", s );
55 printf("------------------------------------------------------------------\n");
56 /* simulate an error.. */
57 printf("\nShould print error msg: \n");
58 o = json_parse_string("[1, .5. null]");
59 if( o == NULL ) printf("\n");
61 printf("------------------------------------------------------------------\n");
62 o = json_parse_string("[ Null, trUe, falSE, 1, 12.9, \"true\" ]");
64 printf("More JSON: %s\n", s);
68 printf("------------------------------------------------------------------\n");
69 o = json_parse_string("[ Null, trUe, falSE, 1, 12.9, \"true\", "
70 "{\"key\":[0,0.0,1],\"key2\":null},NULL, { }, [] ]");
72 printf("More JSON: %s\n", s);
77 printf("------------------------------------------------------------------\n");
78 o = json_parse_string("\"Pin\\u0303ata\"");
80 printf("UNICODE:: %s\n", o->string_data);
81 printf("Back to JSON: %s\n", s);
86 /* sample JSON string with some encoded UTF8 */
87 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--*/";
90 printf("------------------------------------------------------------------\n");
91 printf("\nOriginal JSON\n%s\n", jsons);
93 /* parse the JSON string */
94 object* yuk = json_parse_string(jsons);
96 /* grab the class name from the object */
97 printf("------------------------------------------------------------------\n");
98 printf("\nParsed object with class %s\n", yuk->classname );
100 /* turn the resulting object back into JSON */
101 char* ccc = yuk->to_json(yuk);
103 /* extract a sub-object from the object and print its data*/
104 o = yuk->get_index(yuk, 11);
105 printf("\nRandom unicode string => %s\n", o->string_data);
107 /* parse the new JSON string to build yet another object */
108 object* yuk2 = json_parse_string(ccc);
110 printf("------------------------------------------------------------------\n");
111 /* turn that one back into JSON and print*/
112 char* cccc = yuk2->to_json(yuk2);
113 printf("\nFinal JSON: \n%s\n", cccc);
115 char* string2 = strdup(jsons);
117 printf("------------------------------------------------------------------\n");
120 printf("\nParsing %d round trips at %f...\n", count, get_timestamp_millis());
122 /* parse and stringify many times in a loop to check speed */
125 object* o = json_parse_string(string2);
127 string2 = o->to_json(o);
131 fprintf(stderr, "Round trip at %d\n", x);
134 printf("After Loop: %f\n", get_timestamp_millis());
137 /* to_json() generates a string that must be freed by the caller */
142 /* only free the top level objects. objects that are 'children'
143 of other objects should not be freed */
149 /* ------------------------------------------------------------------------ */
151 /* parse a big JSON file */
152 FILE* F = fopen("test.json", "r");
154 perror("unable to open test.json for testing");
161 bzero(smallbuf, 512);
163 while(fgets(smallbuf, 512, F))
164 strcat(buf, smallbuf);
166 /* dig our way into the JSON object we parsed, see test.json to get
167 an idea of the object structure */
168 printf("------------------------------------------------------------------\n");
169 object* big = json_parse_string(buf);
170 object* k = big->get_key(big,"web-app");
171 object* k2 = k->get_key(k,"servlet");
172 object* k3 = k2->get_index(k2, 0);
173 object* k4 = k3->get_key(k3,"servlet-class");
175 printf("\nValue for object with key 'servlet-class' in the JSON file => %s\n", k4->get_string(k4));