Add support for JSON format

1 files changed, 91 insertions, 0 deletions

diff --git a/src/jsmn.h b/src/jsmn.h
new file mode 100644
index 0000000..f12dc5a
--- /dev/null
+++ b/src/jsmn.h
@@ -0,0 +1,91 @@
+/*
+ * jsmn.h
+ * Simple JSON parser (header file)
+ *
+ * Copyright (c) 2010 Serge A. Zaitsev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef __JSMN_H_
+#define __JSMN_H_
+
+/**
+ * JSON type identifier. Basic types are:
+ *      o Object
+ *      o Array
+ *      o String
+ *      o Other primitive: number, boolean (true/false) or null
+ */
+typedef enum {
+        JSMN_PRIMITIVE = 0,
+        JSMN_OBJECT = 1,
+        JSMN_ARRAY = 2,
+        JSMN_STRING = 3
+} jsmntype_t;
+
+typedef enum {
+        /* Not enough tokens were provided */
+        JSMN_ERROR_NOMEM = -1,
+        /* Invalid character inside JSON string */
+        JSMN_ERROR_INVAL = -2,
+        /* The string is not a full JSON packet, more bytes expected */
+        JSMN_ERROR_PART = -3,
+        /* Everything was fine */
+        JSMN_SUCCESS = 0
+} jsmnerr_t;
+
+/**
+ * JSON token description.
+ * @param               type    type (object, array, string etc.)
+ * @param               start   start position in JSON data string
+ * @param               end             end position in JSON data string
+ */
+typedef struct {
+        jsmntype_t type;
+        int start;
+        int end;
+        int size;
+#ifdef JSMN_PARENT_LINKS
+        int parent;
+#endif
+} jsmntok_t;
+
+/**
+ * JSON parser. Contains an array of token blocks available. Also stores
+ * the string being parsed now and current position in that string
+ */
+typedef struct {
+        unsigned int pos; /* offset in the JSON string */
+        int toknext; /* next token to allocate */
+        int toksuper; /* superior token node, e.g parent object or array */
+} jsmn_parser;
+
+/**
+ * Create JSON parser over an array of tokens
+ */
+void jsmn_init(jsmn_parser *parser);
+
+/**
+ * Run JSON parser. It parses a JSON data string into and array of tokens, each describing
+ * a single JSON object.
+ */
+jsmnerr_t jsmn_parse(jsmn_parser *parser, const char *js,
+                jsmntok_t *tokens, unsigned int num_tokens);
+
+#endif /* __JSMN_H_ */