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970c602a | 1 | /* Simple library for printing JSON data. |
688903eb | 2 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
970c602a WN |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <string.h> | |
20 | ||
21 | #include "json-lib.h" | |
22 | ||
23 | void | |
24 | json_init (json_ctx_t *ctx, unsigned int indent_level, FILE *fp) | |
25 | { | |
26 | ctx->indent_level = indent_level; | |
27 | ctx->fp = fp; | |
28 | ctx->first_element = true; | |
29 | } | |
30 | ||
31 | static void | |
32 | do_indent (json_ctx_t *ctx) | |
33 | { | |
34 | char indent_buf[ctx->indent_level + 1]; | |
35 | ||
36 | memset (indent_buf, ' ', ctx->indent_level + 1); | |
37 | indent_buf[ctx->indent_level] = '\0'; | |
38 | ||
39 | fputs (indent_buf, ctx->fp); | |
40 | } | |
41 | ||
42 | void | |
43 | json_document_begin (json_ctx_t *ctx) | |
44 | { | |
45 | do_indent (ctx); | |
46 | ||
47 | fputs ("{\n", ctx->fp); | |
48 | ||
49 | ctx->indent_level++; | |
50 | ctx->first_element = true; | |
51 | } | |
52 | ||
53 | void | |
54 | json_document_end (json_ctx_t *ctx) | |
55 | { | |
56 | ctx->indent_level--; | |
57 | ||
58 | do_indent (ctx); | |
59 | ||
60 | fputs ("\n}", ctx->fp); | |
61 | } | |
62 | ||
63 | void | |
64 | json_attr_object_begin (json_ctx_t *ctx, const char *name) | |
65 | { | |
66 | if (!ctx->first_element) | |
67 | fprintf (ctx->fp, ",\n"); | |
68 | ||
69 | do_indent (ctx); | |
70 | ||
71 | fprintf (ctx->fp, "\"%s\": {\n", name); | |
72 | ||
73 | ctx->indent_level++; | |
74 | ctx->first_element = true; | |
75 | } | |
76 | ||
77 | void | |
78 | json_attr_object_end (json_ctx_t *ctx) | |
79 | { | |
80 | ctx->indent_level--; | |
81 | ctx->first_element = false; | |
82 | ||
83 | fputs ("\n", ctx->fp); | |
84 | ||
85 | do_indent (ctx); | |
86 | ||
87 | fputs ("}", ctx->fp); | |
88 | } | |
89 | ||
90 | void | |
91 | json_attr_string (json_ctx_t *ctx, const char *name, const char *s) | |
92 | { | |
93 | if (!ctx->first_element) | |
94 | fprintf (ctx->fp, ",\n"); | |
95 | else | |
96 | ctx->first_element = false; | |
97 | ||
98 | do_indent (ctx); | |
99 | ||
100 | fprintf (ctx->fp, "\"%s\": \"%s\"", name, s); | |
101 | } | |
102 | ||
738a9914 SP |
103 | void |
104 | json_attr_uint (json_ctx_t *ctx, const char *name, uint64_t d) | |
105 | { | |
106 | if (!ctx->first_element) | |
107 | fprintf (ctx->fp, ",\n"); | |
108 | else | |
109 | ctx->first_element = false; | |
110 | ||
111 | do_indent (ctx); | |
112 | ||
113 | fprintf (ctx->fp, "\"%s\": %" PRIu64 , name, d); | |
114 | } | |
115 | ||
116 | void | |
117 | json_attr_int (json_ctx_t *ctx, const char *name, int64_t d) | |
118 | { | |
119 | if (!ctx->first_element) | |
120 | fprintf (ctx->fp, ",\n"); | |
121 | else | |
122 | ctx->first_element = false; | |
123 | ||
124 | do_indent (ctx); | |
125 | ||
126 | fprintf (ctx->fp, "\"%s\": %" PRId64 , name, d); | |
127 | } | |
128 | ||
970c602a WN |
129 | void |
130 | json_attr_double (json_ctx_t *ctx, const char *name, double d) | |
131 | { | |
132 | if (!ctx->first_element) | |
133 | fprintf (ctx->fp, ",\n"); | |
134 | else | |
135 | ctx->first_element = false; | |
136 | ||
137 | do_indent (ctx); | |
138 | ||
139 | fprintf (ctx->fp, "\"%s\": %g", name, d); | |
140 | } | |
141 | ||
142 | void | |
143 | json_array_begin (json_ctx_t *ctx, const char *name) | |
144 | { | |
145 | if (!ctx->first_element) | |
146 | fprintf (ctx->fp, ",\n"); | |
147 | ||
148 | do_indent (ctx); | |
149 | ||
150 | fprintf (ctx->fp, "\"%s\": [", name); | |
151 | ||
152 | ctx->indent_level++; | |
153 | ctx->first_element = true; | |
154 | } | |
155 | ||
156 | void | |
157 | json_array_end (json_ctx_t *ctx) | |
158 | { | |
159 | ctx->indent_level--; | |
160 | ctx->first_element = false; | |
161 | ||
162 | fputs ("]", ctx->fp); | |
163 | } | |
164 | ||
738a9914 SP |
165 | void |
166 | json_element_string (json_ctx_t *ctx, const char *s) | |
167 | { | |
168 | if (!ctx->first_element) | |
169 | fprintf (ctx->fp, ", \"%s\"", s); | |
170 | else | |
171 | { | |
172 | fprintf (ctx->fp, "\"%s\"", s); | |
173 | ctx->first_element = false; | |
174 | } | |
175 | } | |
176 | ||
177 | void | |
178 | json_element_uint (json_ctx_t *ctx, uint64_t d) | |
179 | { | |
180 | if (!ctx->first_element) | |
181 | fprintf (ctx->fp, ", %" PRIu64, d); | |
182 | else | |
183 | { | |
184 | fprintf (ctx->fp, "%" PRIu64, d); | |
185 | ctx->first_element = false; | |
186 | } | |
187 | } | |
188 | ||
189 | void | |
190 | json_element_int (json_ctx_t *ctx, int64_t d) | |
191 | { | |
192 | if (!ctx->first_element) | |
193 | fprintf (ctx->fp, ", %" PRId64, d); | |
194 | else | |
195 | { | |
196 | fprintf (ctx->fp, "%" PRId64, d); | |
197 | ctx->first_element = false; | |
198 | } | |
199 | } | |
200 | ||
970c602a WN |
201 | void |
202 | json_element_double (json_ctx_t *ctx, double d) | |
203 | { | |
204 | if (!ctx->first_element) | |
205 | fprintf (ctx->fp, ", %g", d); | |
206 | else | |
207 | { | |
208 | fprintf (ctx->fp, "%g", d); | |
209 | ctx->first_element = false; | |
210 | } | |
211 | } | |
212 | ||
213 | void | |
214 | json_element_object_begin (json_ctx_t *ctx) | |
215 | { | |
216 | if (!ctx->first_element) | |
217 | fprintf (ctx->fp, ","); | |
218 | ||
219 | fputs ("\n", ctx->fp); | |
220 | ||
221 | do_indent (ctx); | |
222 | ||
223 | fputs ("{\n", ctx->fp); | |
224 | ||
225 | ctx->indent_level++; | |
226 | ctx->first_element = true; | |
227 | } | |
228 | ||
229 | void | |
230 | json_element_object_end (json_ctx_t *ctx) | |
231 | { | |
232 | ctx->indent_level--; | |
233 | ctx->first_element = false; | |
234 | ||
235 | fputs ("\n", ctx->fp); | |
236 | ||
237 | do_indent (ctx); | |
238 | ||
239 | fputs ("}", ctx->fp); | |
240 | } |