/* * * json.h * * pgpool: a language independent connection pool server for PostgreSQL * written by Tatsuo Ishii * * Copyright (c) 2003-2015 PgPool Global Development Group * * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby * granted, provided that the above copyright notice appear in all * copies and that both that copyright notice and this permission * notice appear in supporting documentation, and that the name of the * author not be used in advertising or publicity pertaining to * distribution of the software without specific, written prior * permission. The author makes no representations about the * suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * * portion copyright * vim: set et ts=3 sw=3 sts=3 ft=c: * * Copyright (C) 2012, 2013, 2014 James McLaughlin et al. All rights reserved. * https://github.com/udp/json-parser * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _JSON_H #define _JSON_H #ifndef json_char #define json_char char #endif #ifndef json_int_t #ifndef _MSC_VER #include #define json_int_t int64_t #else #define json_int_t __int64 #endif #endif #include #include #ifdef __cplusplus #include extern "C" { #endif typedef struct { unsigned long max_memory; int settings; /* * Custom allocator support (leave null to use malloc/free) */ void *(*mem_alloc) (size_t, int zero, void *user_data); void (*mem_free) (void *, void *user_data); void *user_data; /* will be passed to mem_alloc and mem_free */ size_t value_extra; /* how much extra space to allocate for * values? */ } json_settings; #define json_enable_comments 0x01 typedef enum { json_none, json_object, json_array, json_integer, json_double, json_string, json_boolean, json_null } json_type; extern const struct _json_value json_value_none; typedef struct _json_object_entry { json_char *name; unsigned int name_length; struct _json_value *value; } json_object_entry; typedef struct _json_value { struct _json_value *parent; json_type type; union { int boolean; json_int_t integer; double dbl; struct { unsigned int length; json_char *ptr; /* null terminated */ } string; struct { unsigned int length; json_object_entry *values; #if defined(__cplusplus) && __cplusplus >= 201103L decltype(values) begin() const { return values; } decltype(values) end() const { return values + length; } #endif } object; struct { unsigned int length; struct _json_value **values; #if defined(__cplusplus) && __cplusplus >= 201103L decltype(values) begin() const { return values; } decltype(values) end() const { return values + length; } #endif } array; } u; union { struct _json_value *next_alloc; void *object_mem; } _reserved; #ifdef JSON_TRACK_SOURCE /* * Location of the value in the source JSON */ unsigned int line, col; #endif /* Some C++ operator sugar */ #ifdef __cplusplus public: inline _json_value() { memset(this, 0, sizeof(_json_value)); } inline const struct _json_value &operator[] (int index) const { if (type != json_array || index < 0 || ((unsigned int) index) >= u.array.length) { return json_value_none; } return *u.array.values[index]; } inline const struct _json_value &operator[] (const char *index) const { if (type != json_object) return json_value_none; for (unsigned int i = 0; i < u.object.length; ++i) if (!strcmp(u.object.values[i].name, index)) return *u.object.values[i].value; return json_value_none; } inline operator const char *() const { switch (type) { case json_string: return u.string.ptr; default: return ""; }; } inline operator json_int_t() const { switch (type) { case json_integer: return u.integer; case json_double: return (json_int_t) u.dbl; default: return 0; }; } inline operator bool () const { if (type != json_boolean) return false; return u.boolean != 0; } inline operator double () const { switch (type) { case json_integer: return (double) u.integer; case json_double: return u.dbl; default: return 0; }; } #endif } json_value; json_value *json_parse(const json_char * json, size_t length); #define json_error_max 128 json_value *json_parse_ex(json_settings *settings, const json_char * json, size_t length, char *error); void json_value_free(json_value *); /* Not usually necessary, unless you used a custom mem_alloc and now want to * use a custom mem_free. */ void json_value_free_ex(json_settings *settings, json_value *); #ifdef __cplusplus } /* extern "C" */ #endif /* pgpool-II extensions */ json_value *json_get_value_for_key(json_value *source, const char *key); int json_get_int_value_for_key(json_value *source, const char *key, int *value); int json_get_long_value_for_key(json_value *source, const char *key, long *value); char *json_get_string_value_for_key(json_value *source, const char *key); int json_get_bool_value_for_key(json_value *source, const char *key, bool *value); #endif