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)
111 switch (json_object_get_type(obj)) {
112 case json_type_object:
115 case json_type_array:
118 case json_type_string:
121 case json_type_boolean:
127 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, "' %d;\n", json_object_get_int(obj));
159 case json_type_double:
160 fprintf(stdout, "' %lf;\n", json_object_get_double(obj));
169 static int jshn_parse(const char *str)
173 obj = json_tokener_parse(str);
174 if (!obj || json_object_get_type(obj) != json_type_object) {
175 fprintf(stderr, "Failed to parse message data\n");
178 fprintf(stdout, "json_init;\n");
179 add_json_object(obj);
185 static char *getenv_avl(const char *key)
187 struct env_var *var = avl_find_element(&env_vars, key, var, avl);
188 return var ? var->val : NULL;
191 static char *get_keys(const char *prefix)
195 keys = alloca(var_prefix_len + strlen(prefix) + sizeof("K_") + 1);
196 sprintf(keys, "%sK_%s", var_prefix, prefix);
197 return getenv_avl(keys);
200 static void get_var(const char *prefix, const char **name, char **var, char **type)
202 char *tmpname, *varname;
204 tmpname = alloca(var_prefix_len + strlen(prefix) + 1 + strlen(*name) + 1 + sizeof("T_"));
206 sprintf(tmpname, "%s%s_%s", var_prefix, prefix, *name);
207 *var = getenv_avl(tmpname);
209 sprintf(tmpname, "%sT_%s_%s", var_prefix, prefix, *name);
210 *type = getenv_avl(tmpname);
212 sprintf(tmpname, "%sN_%s_%s", var_prefix, prefix, *name);
213 varname = getenv_avl(tmpname);
218 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array);
220 static void jshn_add_object_var(json_object *obj, bool array, const char *prefix, const char *name)
225 get_var(prefix, &name, &var, &type);
229 if (!strcmp(type, "array")) {
230 new = json_object_new_array();
231 jshn_add_objects(new, var, true);
232 } else if (!strcmp(type, "object")) {
233 new = json_object_new_object();
234 jshn_add_objects(new, var, false);
235 } else if (!strcmp(type, "string")) {
236 new = json_object_new_string(var);
237 } else if (!strcmp(type, "int")) {
238 new = json_object_new_int(atoi(var));
239 } else if (!strcmp(type, "double")) {
240 new = json_object_new_double(strtod(var, NULL));
241 } else if (!strcmp(type, "boolean")) {
242 new = json_object_new_boolean(!!atoi(var));
248 json_object_array_add(obj, new);
250 json_object_object_add(obj, name, new);
253 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array)
255 char *keys, *key, *brk;
257 keys = get_keys(prefix);
261 for (key = strtok_r(keys, " ", &brk); key;
262 key = strtok_r(NULL, " ", &brk)) {
263 jshn_add_object_var(obj, array, prefix, key);
270 static int jshn_format(bool no_newline, bool indent)
274 char *blobmsg_output = NULL;
277 if (!(obj = json_object_new_object()))
280 jshn_add_objects(obj, "J_V", false);
281 if (!(output = json_object_to_json_string(obj)))
285 blob_buf_init(&b, 0);
286 if (!blobmsg_add_json_from_string(&b, output))
288 if (!(blobmsg_output = blobmsg_format_json_indent(b.head, 1, 0)))
290 output = blobmsg_output;
292 fprintf(stdout, "%s%s", output, no_newline ? "" : "\n");
293 free(blobmsg_output);
297 json_object_put(obj);
301 static int usage(const char *progname)
303 fprintf(stderr, "Usage: %s [-n] [-i] -r <message>|-w\n", progname);
307 static int avl_strcmp_var(const void *k1, const void *k2, void *ptr)
313 while (*s1 && *s1 == *s2) {
328 int main(int argc, char **argv)
330 extern char **environ;
331 bool no_newline = false;
333 struct env_var *vars;
337 avl_init(&env_vars, avl_strcmp_var, false, NULL);
338 for (i = 0; environ[i]; i++);
340 vars = calloc(i, sizeof(*vars));
342 fprintf(stderr, "%m\n");
345 for (i = 0; environ[i]; i++) {
348 vars[i].avl.key = environ[i];
349 c = strchr(environ[i], '=');
354 avl_insert(&env_vars, &vars[i].avl);
357 while ((ch = getopt(argc, argv, "p:nir:w")) != -1) {
361 var_prefix_len = strlen(var_prefix);
364 return jshn_parse(optarg);
366 return jshn_format(no_newline, indent);
374 return usage(argv[0]);
377 return usage(argv[0]);