2 * Copyright (C) 2011-2013 Felix Fietkau <nbd@openwrt.org>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 #include <json/json.h>
25 #define MAX_VARLEN 256
27 static const char *var_prefix = "";
28 static int var_prefix_len = 0;
30 static int add_json_element(const char *key, json_object *obj);
32 static int add_json_object(json_object *obj)
36 json_object_object_foreach(obj, key, val) {
37 ret = add_json_element(key, val);
44 static int add_json_array(struct array_list *a)
50 for (i = 0, len = array_list_length(a); i < len; i++) {
51 sprintf(seq, "%d", i);
52 ret = add_json_element(seq, array_list_get_idx(a, i));
60 static void add_json_string(const char *str)
62 char *ptr = (char *) str;
66 while ((c = strchr(ptr, '\'')) != NULL) {
69 fwrite(ptr, len, 1, stdout);
72 fwrite(c, strlen(c), 1, stdout);
76 fwrite(ptr, len, 1, stdout);
79 static void write_key_string(const char *key)
82 putc(isalnum(*key) ? *key : '_', stdout);
87 static int add_json_element(const char *key, json_object *obj)
94 switch (json_object_get_type(obj)) {
95 case json_type_object:
101 case json_type_string:
104 case json_type_boolean:
114 fprintf(stdout, "json_add_%s '", type);
115 write_key_string(key);
117 switch (json_object_get_type(obj)) {
118 case json_type_object:
119 fprintf(stdout, "';\n");
120 add_json_object(obj);
121 fprintf(stdout, "json_close_object;\n");
123 case json_type_array:
124 fprintf(stdout, "';\n");
125 add_json_array(json_object_get_array(obj));
126 fprintf(stdout, "json_close_array;\n");
128 case json_type_string:
129 fprintf(stdout, "' '");
130 add_json_string(json_object_get_string(obj));
131 fprintf(stdout, "';\n");
133 case json_type_boolean:
134 fprintf(stdout, "' %d;\n", json_object_get_boolean(obj));
137 fprintf(stdout, "' %d;\n", json_object_get_int(obj));
146 static int jshn_parse(const char *str)
150 obj = json_tokener_parse(str);
151 if (is_error(obj) || json_object_get_type(obj) != json_type_object) {
152 fprintf(stderr, "Failed to parse message data\n");
155 fprintf(stdout, "json_init;\n");
156 add_json_object(obj);
162 static char *get_keys(const char *prefix)
166 keys = alloca(var_prefix_len + strlen(prefix) + sizeof("KEYS_") + 1);
167 sprintf(keys, "%sKEYS_%s", var_prefix, prefix);
171 static void get_var(const char *prefix, const char **name, char **var, char **type)
173 char *tmpname, *varname;
175 tmpname = alloca(var_prefix_len + strlen(prefix) + 1 + strlen(*name) + 1 + sizeof("TYPE_"));
177 sprintf(tmpname, "%s%s_%s", var_prefix, prefix, *name);
178 *var = getenv(tmpname);
180 sprintf(tmpname, "%sTYPE_%s_%s", var_prefix, prefix, *name);
181 *type = getenv(tmpname);
183 sprintf(tmpname, "%sNAME_%s_%s", var_prefix, prefix, *name);
184 varname = getenv(tmpname);
189 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array);
191 static void jshn_add_object_var(json_object *obj, bool array, const char *prefix, const char *name)
196 get_var(prefix, &name, &var, &type);
200 if (!strcmp(type, "array")) {
201 new = json_object_new_array();
202 jshn_add_objects(new, var, true);
203 } else if (!strcmp(type, "object")) {
204 new = json_object_new_object();
205 jshn_add_objects(new, var, false);
206 } else if (!strcmp(type, "string")) {
207 new = json_object_new_string(var);
208 } else if (!strcmp(type, "int")) {
209 new = json_object_new_int(atoi(var));
210 } else if (!strcmp(type, "boolean")) {
211 new = json_object_new_boolean(!!atoi(var));
217 json_object_array_add(obj, new);
219 json_object_object_add(obj, name, new);
222 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array)
224 char *keys, *key, *brk;
226 keys = get_keys(prefix);
230 for (key = strtok_r(keys, " ", &brk); key;
231 key = strtok_r(NULL, " ", &brk)) {
232 jshn_add_object_var(obj, array, prefix, key);
239 static int jshn_format(bool no_newline)
243 obj = json_object_new_object();
244 jshn_add_objects(obj, "JSON_VAR", false);
245 fprintf(stdout, "%s%s", json_object_to_json_string(obj),
246 no_newline ? "" : "\n");
247 json_object_put(obj);
251 static int usage(const char *progname)
253 fprintf(stderr, "Usage: %s [-n] -r <message>|-w\n", progname);
257 int main(int argc, char **argv)
259 bool no_newline = false;
262 while ((ch = getopt(argc, argv, "p:nr:w")) != -1) {
266 var_prefix_len = strlen(var_prefix);
269 return jshn_parse(optarg);
271 return jshn_format(no_newline);
276 return usage(argv[0]);
279 return usage(argv[0]);