1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright 2007-2009, Lloyd Hilaiel.
*
* 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.
*
* 3. Neither the name of Lloyd Hilaiel nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
/**
* \file yajl_gen.h
* Interface to YAJL's JSON generation facilities.
*/
#include <yajl/yajl_common.h>
#ifndef __YAJL_GEN_H__
#define __YAJL_GEN_H__
#ifdef __cplusplus
extern "C" {
#endif
/** generator status codes */
typedef enum {
/** no error */
yajl_gen_status_ok = 0,
/** at a point where a map key is generated, a function other than
* yajl_gen_string was called */
yajl_gen_keys_must_be_strings,
/** YAJL's maximum generation depth was exceeded. see
* YAJL_MAX_DEPTH */
yajl_max_depth_exceeded,
/** A generator function (yajl_gen_XXX) was called while in an error
* state */
yajl_gen_in_error_state,
/** A complete JSON document has been generated */
yajl_gen_generation_complete,
/** yajl_gen_double was passed an invalid floating point value
* (infinity or NaN). */
yajl_gen_invalid_number,
/** A print callback was passed in, so there is no internal
* buffer to get from */
yajl_gen_no_buf
} yajl_gen_status;
/** an opaque handle to a generator */
typedef struct yajl_gen_t * yajl_gen;
/** a callback used for "printing" the results. */
typedef void (*yajl_print_t)(void * ctx,
const char * str,
unsigned int len);
/** configuration structure for the generator */
typedef struct {
/** generate indented (beautiful) output */
unsigned int beautify;
/** an opportunity to define an indent string. such as \\t or
* some number of spaces. default is four spaces ' '. This
* member is only relevant when beautify is true */
const char * indentString;
} yajl_gen_config;
/** allocate a generator handle
* \param config a pointer to a structure containing parameters which
* configure the behavior of the json generator
* \param allocFuncs an optional pointer to a structure which allows
* the client to overide the memory allocation
* used by yajl. May be NULL, in which case
* malloc/free/realloc will be used.
*
* \returns an allocated handle on success, NULL on failure (bad params)
*/
YAJL_API yajl_gen yajl_gen_alloc(const yajl_gen_config * config,
const yajl_alloc_funcs * allocFuncs);
/** allocate a generator handle that will print to the specified
* callback rather than storing the results in an internal buffer.
* \param callback a pointer to a printer function. May be NULL
* in which case, the results will be store in an
* internal buffer.
* \param config a pointer to a structure containing parameters
* which configure the behavior of the json
* generator.
* \param allocFuncs an optional pointer to a structure which allows
* the client to overide the memory allocation
* used by yajl. May be NULL, in which case
* malloc/free/realloc will be used.
* \param ctx a context pointer that will be passed to the
* printer callback.
*
* \returns an allocated handle on success, NULL on failure (bad params)
*/
YAJL_API yajl_gen yajl_gen_alloc2(const yajl_print_t callback,
const yajl_gen_config * config,
const yajl_alloc_funcs * allocFuncs,
void * ctx);
/** free a generator handle */
YAJL_API void yajl_gen_free(yajl_gen handle);
YAJL_API yajl_gen_status yajl_gen_integer(yajl_gen hand, long int number);
/** generate a floating point number. number may not be infinity or
* NaN, as these have no representation in JSON. In these cases the
* generator will return 'yajl_gen_invalid_number' */
YAJL_API yajl_gen_status yajl_gen_double(yajl_gen hand, double number);
YAJL_API yajl_gen_status yajl_gen_number(yajl_gen hand,
const char * num,
unsigned int len);
YAJL_API yajl_gen_status yajl_gen_string(yajl_gen hand,
const unsigned char * str,
unsigned int len);
YAJL_API yajl_gen_status yajl_gen_null(yajl_gen hand);
YAJL_API yajl_gen_status yajl_gen_bool(yajl_gen hand, int boolean);
YAJL_API yajl_gen_status yajl_gen_map_open(yajl_gen hand);
YAJL_API yajl_gen_status yajl_gen_map_close(yajl_gen hand);
YAJL_API yajl_gen_status yajl_gen_array_open(yajl_gen hand);
YAJL_API yajl_gen_status yajl_gen_array_close(yajl_gen hand);
/** access the null terminated generator buffer. If incrementally
* outputing JSON, one should call yajl_gen_clear to clear the
* buffer. This allows stream generation. */
YAJL_API yajl_gen_status yajl_gen_get_buf(yajl_gen hand,
const unsigned char ** buf,
unsigned int * len);
/** clear yajl's output buffer, but maintain all internal generation
* state. This function will not "reset" the generator state, and is
* intended to enable incremental JSON outputing. */
YAJL_API void yajl_gen_clear(yajl_gen hand);
#ifdef __cplusplus
}
#endif
#endif
|
