small weather widget for X11
1/*
2 * Fetched from https://github.com/skeeto/pdjson 67108d883
3 *
4 * This is free and unencumbered software released into the public domain.
5 *
6 * Anyone is free to copy, modify, publish, use, compile, sell, or
7 * distribute this software, either in source code form or as a compiled
8 * binary, for any purpose, commercial or non-commercial, and by any
9 * means.
10 *
11 * In jurisdictions that recognize copyright laws, the author or authors
12 * of this software dedicate any and all copyright interest in the
13 * software to the public domain. We make this dedication for the benefit
14 * of the public at large and to the detriment of our heirs and
15 * successors. We intend this dedication to be an overt act of
16 * relinquishment in perpetuity of all present and future rights to this
17 * software under copyright law.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * For more information, please refer to <http://unlicense.org/>
28 */
29
30#ifndef PDJSON_H
31#define PDJSON_H
32
33#ifndef PDJSON_SYMEXPORT
34# define PDJSON_SYMEXPORT
35#endif
36
37#ifdef __cplusplus
38extern "C" {
39#else
40#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
41 #include <stdbool.h>
42#else
43 #ifndef bool
44 #define bool int
45 #define true 1
46 #define false 0
47 #endif /* bool */
48#endif /* __STDC_VERSION__ */
49#endif /* __cplusplus */
50
51#include <stdio.h>
52
53enum json_type {
54 JSON_ERROR = 1, JSON_DONE,
55 JSON_OBJECT, JSON_OBJECT_END, JSON_ARRAY, JSON_ARRAY_END,
56 JSON_STRING, JSON_NUMBER, JSON_TRUE, JSON_FALSE, JSON_NULL
57};
58
59struct json_allocator {
60 void *(*malloc)(size_t);
61 void *(*realloc)(void *, size_t);
62 void (*free)(void *);
63};
64
65typedef int (*json_user_io)(void *user);
66
67typedef struct json_stream json_stream;
68typedef struct json_allocator json_allocator;
69
70PDJSON_SYMEXPORT void json_open_buffer(json_stream *json, const void *buffer, size_t size);
71PDJSON_SYMEXPORT void json_open_string(json_stream *json, const char *string);
72PDJSON_SYMEXPORT void json_open_stream(json_stream *json, FILE *stream);
73PDJSON_SYMEXPORT void json_open_user(json_stream *json, json_user_io get, json_user_io peek, void *user);
74PDJSON_SYMEXPORT void json_close(json_stream *json);
75
76PDJSON_SYMEXPORT void json_set_allocator(json_stream *json, json_allocator *a);
77PDJSON_SYMEXPORT void json_set_streaming(json_stream *json, bool mode);
78
79PDJSON_SYMEXPORT enum json_type json_next(json_stream *json);
80PDJSON_SYMEXPORT enum json_type json_peek(json_stream *json);
81PDJSON_SYMEXPORT void json_reset(json_stream *json);
82PDJSON_SYMEXPORT const char *json_get_string(json_stream *json, size_t *length);
83PDJSON_SYMEXPORT double json_get_number(json_stream *json);
84
85PDJSON_SYMEXPORT enum json_type json_skip(json_stream *json);
86PDJSON_SYMEXPORT enum json_type json_skip_until(json_stream *json, enum json_type type);
87
88PDJSON_SYMEXPORT size_t json_get_lineno(json_stream *json);
89PDJSON_SYMEXPORT size_t json_get_position(json_stream *json);
90PDJSON_SYMEXPORT size_t json_get_depth(json_stream *json);
91PDJSON_SYMEXPORT enum json_type json_get_context(json_stream *json, size_t *count);
92PDJSON_SYMEXPORT const char *json_get_error(json_stream *json);
93
94PDJSON_SYMEXPORT int json_source_get(json_stream *json);
95PDJSON_SYMEXPORT int json_source_peek(json_stream *json);
96PDJSON_SYMEXPORT bool json_isspace(int c);
97
98/* internal */
99
100struct json_source {
101 int (*get)(struct json_source *);
102 int (*peek)(struct json_source *);
103 size_t position;
104 union {
105 struct {
106 FILE *stream;
107 } stream;
108 struct {
109 const char *buffer;
110 size_t length;
111 } buffer;
112 struct {
113 void *ptr;
114 json_user_io get;
115 json_user_io peek;
116 } user;
117 } source;
118};
119
120struct json_stream {
121 size_t lineno;
122
123 struct json_stack *stack;
124 size_t stack_top;
125 size_t stack_size;
126 enum json_type next;
127 unsigned flags;
128
129 struct {
130 char *string;
131 size_t string_fill;
132 size_t string_size;
133 } data;
134
135 size_t ntokens;
136
137 struct json_source source;
138 struct json_allocator alloc;
139 char errmsg[128];
140};
141
142#ifdef __cplusplus
143} /* extern "C" */
144#endif /* __cplusplus */
145
146#endif