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>
35 #include "blobmsg_json.h"
37 #define MAX_VARLEN 256
39 static struct avl_tree env_vars;
40 static struct blob_buf b = { 0 };
42 static const char *var_prefix = "";
43 static int var_prefix_len = 0;
45 static int add_json_element(const char *key, json_object *obj);
52 static int add_json_object(json_object *obj)
56 json_object_object_foreach(obj, key, val) {
57 ret = add_json_element(key, val);
64 static int add_json_array(struct array_list *a)
70 for (i = 0, len = array_list_length(a); i < len; i++) {
71 sprintf(seq, "%d", i);
72 ret = add_json_element(seq, array_list_get_idx(a, i));
80 static void add_json_string(const char *str)
82 char *ptr = (char *) str;
86 while ((c = strchr(ptr, '\'')) != NULL) {
89 fwrite(ptr, len, 1, stdout);
92 fwrite(c, strlen(c), 1, stdout);
96 fwrite(ptr, len, 1, stdout);
99 static void write_key_string(const char *key)
102 putc(isalnum(*key) ? *key : '_', stdout);
107 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:
137 fprintf(stdout, "json_add_%s '", type);
138 write_key_string(key);
140 switch (json_object_get_type(obj)) {
141 case json_type_object:
142 fprintf(stdout, "';\n");
143 add_json_object(obj);
144 fprintf(stdout, "json_close_object;\n");
146 case json_type_array:
147 fprintf(stdout, "';\n");
148 add_json_array(json_object_get_array(obj));
149 fprintf(stdout, "json_close_array;\n");
151 case json_type_string:
152 fprintf(stdout, "' '");
153 add_json_string(json_object_get_string(obj));
154 fprintf(stdout, "';\n");
156 case json_type_boolean:
157 fprintf(stdout, "' %d;\n", json_object_get_boolean(obj));
160 fprintf(stdout, "' %"PRId64";\n", json_object_get_int64(obj));
162 case json_type_double:
163 fprintf(stdout, "' %lf;\n", json_object_get_double(obj));
166 fprintf(stdout, "';\n");
175 static int jshn_parse(const char *str)
179 obj = json_tokener_parse(str);
180 if (!obj || json_object_get_type(obj) != json_type_object) {
181 fprintf(stderr, "Failed to parse message data\n");
184 fprintf(stdout, "json_init;\n");
185 add_json_object(obj);
191 static char *getenv_avl(const char *key)
193 struct env_var *var = avl_find_element(&env_vars, key, var, avl);
194 return var ? var->val : NULL;
197 static char *get_keys(const char *prefix)
201 keys = alloca(var_prefix_len + strlen(prefix) + sizeof("K_") + 1);
202 sprintf(keys, "%sK_%s", var_prefix, prefix);
203 return getenv_avl(keys);
206 static void get_var(const char *prefix, const char **name, char **var, char **type)
208 char *tmpname, *varname;
210 tmpname = alloca(var_prefix_len + strlen(prefix) + 1 + strlen(*name) + 1 + sizeof("T_"));
212 sprintf(tmpname, "%s%s_%s", var_prefix, prefix, *name);
213 *var = getenv_avl(tmpname);
215 sprintf(tmpname, "%sT_%s_%s", var_prefix, prefix, *name);
216 *type = getenv_avl(tmpname);
218 sprintf(tmpname, "%sN_%s_%s", var_prefix, prefix, *name);
219 varname = getenv_avl(tmpname);
224 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array);
226 static void jshn_add_object_var(json_object *obj, bool array, const char *prefix, const char *name)
231 get_var(prefix, &name, &var, &type);
235 if (!strcmp(type, "array")) {
236 new = json_object_new_array();
237 jshn_add_objects(new, var, true);
238 } else if (!strcmp(type, "object")) {
239 new = json_object_new_object();
240 jshn_add_objects(new, var, false);
241 } else if (!strcmp(type, "string")) {
242 new = json_object_new_string(var);
243 } else if (!strcmp(type, "int")) {
244 new = json_object_new_int64(atoll(var));
245 } else if (!strcmp(type, "double")) {
246 new = json_object_new_double(strtod(var, NULL));
247 } else if (!strcmp(type, "boolean")) {
248 new = json_object_new_boolean(!!atoi(var));
249 } else if (!strcmp(type, "null")) {
256 json_object_array_add(obj, new);
258 json_object_object_add(obj, name, new);
261 static json_object *jshn_add_objects(json_object *obj, const char *prefix, bool array)
263 char *keys, *key, *brk;
265 keys = get_keys(prefix);
269 for (key = strtok_r(keys, " ", &brk); key;
270 key = strtok_r(NULL, " ", &brk)) {
271 jshn_add_object_var(obj, array, prefix, key);
278 static int jshn_format(bool no_newline, bool indent)
282 char *blobmsg_output = NULL;
285 if (!(obj = json_object_new_object()))
288 jshn_add_objects(obj, "J_V", false);
289 if (!(output = json_object_to_json_string(obj)))
293 blob_buf_init(&b, 0);
294 if (!blobmsg_add_json_from_string(&b, output))
296 if (!(blobmsg_output = blobmsg_format_json_indent(b.head, 1, 0)))
298 output = blobmsg_output;
300 fprintf(stdout, "%s%s", output, no_newline ? "" : "\n");
301 free(blobmsg_output);
305 json_object_put(obj);
309 static int usage(const char *progname)
311 fprintf(stderr, "Usage: %s [-n] [-i] -r <message>|-R <file>|-w\n", progname);
315 static int avl_strcmp_var(const void *k1, const void *k2, void *ptr)
321 while (*s1 && *s1 == *s2) {
336 int main(int argc, char **argv)
338 extern char **environ;
339 bool no_newline = false;
341 struct env_var *vars;
349 avl_init(&env_vars, avl_strcmp_var, false, NULL);
350 for (i = 0; environ[i]; i++);
352 vars = calloc(i, sizeof(*vars));
354 fprintf(stderr, "%m\n");
357 for (i = 0; environ[i]; i++) {
360 vars[i].avl.key = environ[i];
361 c = strchr(environ[i], '=');
366 avl_insert(&env_vars, &vars[i].avl);
369 while ((ch = getopt(argc, argv, "p:nir:R:w")) != -1) {
373 var_prefix_len = strlen(var_prefix);
376 return jshn_parse(optarg);
378 if ((fd = open(optarg, O_RDONLY)) == -1) {
379 fprintf(stderr, "Error opening %s\n", optarg);
382 if (fstat(fd, &sb) == -1) {
383 fprintf(stderr, "Error getting size of %s\n", optarg);
387 if (!(fbuf = malloc(sb.st_size))) {
388 fprintf(stderr, "Error allocating memory for %s\n", optarg);
392 if (read(fd, fbuf, sb.st_size) != sb.st_size) {
393 fprintf(stderr, "Error reading %s\n", optarg);
398 ret = jshn_parse(fbuf);
403 return jshn_format(no_newline, indent);
411 return usage(argv[0]);
414 return usage(argv[0]);