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authorredpony <redpony@ec762483-ff6d-05da-a07a-a48fb63a330f>2010-06-22 05:12:27 +0000
committerredpony <redpony@ec762483-ff6d-05da-a07a-a48fb63a330f>2010-06-22 05:12:27 +0000
commit0172721855098ca02b207231a654dffa5e4eb1c9 (patch)
tree8069c3a62e2d72bd64a2cdeee9724b2679c8a56b /decoder/JSON_parser.h
parent37728b8be4d0b3df9da81fdda2198ff55b4b2d91 (diff)
initial checkin
git-svn-id: https://ws10smt.googlecode.com/svn/trunk@2 ec762483-ff6d-05da-a07a-a48fb63a330f
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+#ifndef JSON_PARSER_H
+#define JSON_PARSER_H
+
+/* JSON_parser.h */
+
+
+#include <stddef.h>
+
+/* Windows DLL stuff */
+#ifdef _WIN32
+# ifdef JSON_PARSER_DLL_EXPORTS
+# define JSON_PARSER_DLL_API __declspec(dllexport)
+# else
+# define JSON_PARSER_DLL_API __declspec(dllimport)
+# endif
+#else
+# define JSON_PARSER_DLL_API
+#endif
+
+/* Determine the integer type use to parse non-floating point numbers */
+#if __STDC_VERSION__ >= 199901L || HAVE_LONG_LONG == 1
+typedef long long JSON_int_t;
+#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%lld"
+#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%lld"
+#else
+typedef long JSON_int_t;
+#define JSON_PARSER_INTEGER_SSCANF_TOKEN "%ld"
+#define JSON_PARSER_INTEGER_SPRINTF_TOKEN "%ld"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum
+{
+ JSON_T_NONE = 0,
+ JSON_T_ARRAY_BEGIN, // 1
+ JSON_T_ARRAY_END, // 2
+ JSON_T_OBJECT_BEGIN, // 3
+ JSON_T_OBJECT_END, // 4
+ JSON_T_INTEGER, // 5
+ JSON_T_FLOAT, // 6
+ JSON_T_NULL, // 7
+ JSON_T_TRUE, // 8
+ JSON_T_FALSE, // 9
+ JSON_T_STRING, // 10
+ JSON_T_KEY, // 11
+ JSON_T_MAX // 12
+} JSON_type;
+
+typedef struct JSON_value_struct {
+ union {
+ JSON_int_t integer_value;
+
+ long double float_value;
+
+ struct {
+ const char* value;
+ size_t length;
+ } str;
+ } vu;
+} JSON_value;
+
+typedef struct JSON_parser_struct* JSON_parser;
+
+/*! \brief JSON parser callback
+
+ \param ctx The pointer passed to new_JSON_parser.
+ \param type An element of JSON_type but not JSON_T_NONE.
+ \param value A representation of the parsed value. This parameter is NULL for
+ JSON_T_ARRAY_BEGIN, JSON_T_ARRAY_END, JSON_T_OBJECT_BEGIN, JSON_T_OBJECT_END,
+ JSON_T_NULL, JSON_T_TRUE, and SON_T_FALSE. String values are always returned
+ as zero-terminated C strings.
+
+ \return Non-zero if parsing should continue, else zero.
+*/
+typedef int (*JSON_parser_callback)(void* ctx, int type, const struct JSON_value_struct* value);
+
+
+/*! \brief The structure used to configure a JSON parser object
+
+ \param depth If negative, the parser can parse arbitrary levels of JSON, otherwise
+ the depth is the limit
+ \param Pointer to a callback. This parameter may be NULL. In this case the input is merely checked for validity.
+ \param Callback context. This parameter may be NULL.
+ \param depth. Specifies the levels of nested JSON to allow. Negative numbers yield unlimited nesting.
+ \param allowComments. To allow C style comments in JSON, set to non-zero.
+ \param handleFloatsManually. To decode floating point numbers manually set this parameter to non-zero.
+
+ \return The parser object.
+*/
+typedef struct {
+ JSON_parser_callback callback;
+ void* callback_ctx;
+ int depth;
+ int allow_comments;
+ int handle_floats_manually;
+} JSON_config;
+
+
+/*! \brief Initializes the JSON parser configuration structure to default values.
+
+ The default configuration is
+ - 127 levels of nested JSON (depends on JSON_PARSER_STACK_SIZE, see json_parser.c)
+ - no parsing, just checking for JSON syntax
+ - no comments
+
+ \param config. Used to configure the parser.
+*/
+JSON_PARSER_DLL_API void init_JSON_config(JSON_config* config);
+
+/*! \brief Create a JSON parser object
+
+ \param config. Used to configure the parser. Set to NULL to use the default configuration.
+ See init_JSON_config
+
+ \return The parser object.
+*/
+JSON_PARSER_DLL_API extern JSON_parser new_JSON_parser(JSON_config* config);
+
+/*! \brief Destroy a previously created JSON parser object. */
+JSON_PARSER_DLL_API extern void delete_JSON_parser(JSON_parser jc);
+
+/*! \brief Parse a character.
+
+ \return Non-zero, if all characters passed to this function are part of are valid JSON.
+*/
+JSON_PARSER_DLL_API extern int JSON_parser_char(JSON_parser jc, int next_char);
+
+/*! \brief Finalize parsing.
+
+ Call this method once after all input characters have been consumed.
+
+ \return Non-zero, if all parsed characters are valid JSON, zero otherwise.
+*/
+JSON_PARSER_DLL_API extern int JSON_parser_done(JSON_parser jc);
+
+/*! \brief Determine if a given string is valid JSON white space
+
+ \return Non-zero if the string is valid, zero otherwise.
+*/
+JSON_PARSER_DLL_API extern int JSON_parser_is_legal_white_space_string(const char* s);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* JSON_PARSER_H */