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.
19 #include <json/json.h>
32 #include "blobmsg_json.h"
34 #define MAX_VARLEN 256
36 static struct avl_tree env_vars;
37 static struct blob_buf b = { 0 };
39 static const char *var_prefix = "";
40 static int var_prefix_len = 0;
42 static int add_json_element(const char *key, json_object *obj);
49 static int add_json_object(json_object *obj)
53 json_object_object_foreach(obj, key, val) {
54 ret = add_json_element(key, val);
61 static int add_json_array(struct array_list *a)
67 for (i = 0, len = array_list_length(a); i < len; i++) {
68 sprintf(seq, "%d", i);
69 ret = add_json_element(seq, array_list_get_idx(a, i));
77 static void add_json_string(const char *str)
79 char *ptr = (char *) str;
83 while ((c = strchr(ptr, '\'')) != NULL) {
86 fwrite(ptr, len, 1, stdout);
89 fwrite(c, strlen(c), 1, stdout);
93 fwrite(ptr, len, 1, stdout);
96 static void write_key_string(const char *key)
99 putc(isalnum(*key) ? *key : '_', stdout);
104 static int add_json_element(const char *key, json_object *obj)
108 switch (json_object_get_type(obj)) {
109 case json_type_object:
112 case json_type_array:
115 case json_type_string:
118 case json_type_boolean:
124 case json_type_double:
134 fprintf(stdout, "json_add_%s '", type);
135 write_key_string(key);
137 switch (json_object_get_type(obj)) {
138 case json_type_object:
139 fprintf(stdout, "';\n");
140 add_json_object(obj);
141 fprintf(stdout, "json_close_object;\n");
143 case json_type_array:
144 fprintf(stdout, "';\n");
145 add_json_array(json_object_get_array(obj));
146 fprintf(stdout, "json_close_array;\n");
148 case json_type_string:
149 fprintf(stdout, "' '");
150 add_json_string(json_object_get_string(obj));
151 fprintf(stdout, "';\n");
153 case json_type_boolean:
154 fprintf(stdout, "' %d;\n", json_object_get_boolean(obj));
157 fprintf(stdout, "' %jd;\n", json_object_get_int64(obj));
159 case json_type_double:
160 fprintf(stdout, "' %lf;\n", json_object_get_double(obj));
163 fprintf(stdout, "';\n");
172 static int jshn_parse(const char *str)
176 obj = json_tokener_parse(str);
177 if (!obj || json_object_get_type(obj) != json_type_object) {
178 fprintf(stderr, "Failed to parse message data\n");
181 fprintf(stdout, "json_init;\n");
182 add_json_object(obj);
188 static char *getenv_avl(const char *key)
190 struct env_var *var = avl_find_element(&env_vars, key, var, avl);
191 return var ? var->val : NULL;
194 static char *get_keys(const char *prefix)
198 keys = alloca(var_prefix_len + strlen(prefix) + sizeof("K_") + 1);
199 sprintf(keys, "%sK_%s", var_prefix, prefix);
200 return getenv_avl(keys);
203 static void get_var(const char *prefix, const char **name, char **var, char **type)
205 char *tmpname, *varname;
207 tmpname = alloca(var_prefix_len + strlen(prefix) + 1 + strlen(*name) + 1 + sizeof("T_"));
209 sprintf(tmpname, "%s%s_%s", var_prefix, prefix, *name);
210 *var = getenv_avl(tmpname);
212 sprintf(tmpname, "%sT_%s_%s", var_prefix, prefix, *name);
213 *type = getenv_avl(tmpname);
215 sprintf(tmpname, "%sN_%s_%s", var_prefix, prefix, *name);
216 varname = getenv_avl(tmpname);
221 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array);
223 static void jshn_add_object_var(json_object *obj, bool array, const char *prefix, const char *name)
228 get_var(prefix, &name, &var, &type);
232 if (!strcmp(type, "array")) {
233 new = json_object_new_array();
234 jshn_add_objects(new, var, true);
235 } else if (!strcmp(type, "object")) {
236 new = json_object_new_object();
237 jshn_add_objects(new, var, false);
238 } else if (!strcmp(type, "string")) {
239 new = json_object_new_string(var);
240 } else if (!strcmp(type, "int")) {
241 new = json_object_new_int64(atoll(var));
242 } else if (!strcmp(type, "double")) {
243 new = json_object_new_double(strtod(var, NULL));
244 } else if (!strcmp(type, "boolean")) {
245 new = json_object_new_boolean(!!atoi(var));
246 } else if (!strcmp(type, "null")) {
253 json_object_array_add(obj, new);
255 json_object_object_add(obj, name, new);
258 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array)
260 char *keys, *key, *brk;
262 keys = get_keys(prefix);
266 for (key = strtok_r(keys, " ", &brk); key;
267 key = strtok_r(NULL, " ", &brk)) {
268 jshn_add_object_var(obj, array, prefix, key);
275 static int jshn_format(bool no_newline, bool indent)
279 char *blobmsg_output = NULL;
282 if (!(obj = json_object_new_object()))
285 jshn_add_objects(obj, "J_V", false);
286 if (!(output = json_object_to_json_string(obj)))
290 blob_buf_init(&b, 0);
291 if (!blobmsg_add_json_from_string(&b, output))
293 if (!(blobmsg_output = blobmsg_format_json_indent(b.head, 1, 0)))
295 output = blobmsg_output;
297 fprintf(stdout, "%s%s", output, no_newline ? "" : "\n");
298 free(blobmsg_output);
302 json_object_put(obj);
306 static int usage(const char *progname)
308 fprintf(stderr, "Usage: %s [-n] [-i] -r <message>|-w\n", progname);
312 static int avl_strcmp_var(const void *k1, const void *k2, void *ptr)
318 while (*s1 && *s1 == *s2) {
333 int main(int argc, char **argv)
335 extern char **environ;
336 bool no_newline = false;
338 struct env_var *vars;
342 avl_init(&env_vars, avl_strcmp_var, false, NULL);
343 for (i = 0; environ[i]; i++);
345 vars = calloc(i, sizeof(*vars));
347 fprintf(stderr, "%m\n");
350 for (i = 0; environ[i]; i++) {
353 vars[i].avl.key = environ[i];
354 c = strchr(environ[i], '=');
359 avl_insert(&env_vars, &vars[i].avl);
362 while ((ch = getopt(argc, argv, "p:nir:w")) != -1) {
366 var_prefix_len = strlen(var_prefix);
369 return jshn_parse(optarg);
371 return jshn_format(no_newline, indent);
379 return usage(argv[0]);
382 return usage(argv[0]);