PipeWire  0.3.59
json-pod.h
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1 /* Simple Plugin API
2  *
3  * Copyright © 2022 Wim Taymans
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
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24 
25 #ifndef SPA_UTILS_JSON_POD_H
26 #define SPA_UTILS_JSON_POD_H
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
32 #include <spa/utils/string.h>
33 #include <spa/utils/json.h>
34 #include <spa/pod/pod.h>
35 #include <spa/pod/builder.h>
36 #include <spa/debug/types.h>
37 
47 static inline int spa_json_to_pod_part(struct spa_pod_builder *b, uint32_t flags, uint32_t id,
48  const struct spa_type_info *info, struct spa_json *iter, const char *value, int len)
49 {
50  const struct spa_type_info *ti;
51  char key[256];
52  struct spa_pod_frame f[1];
53  struct spa_json it[1];
54  int l, res;
55  const char *v;
56  uint32_t type;
57 
58  if (spa_json_is_object(value, len) && info != NULL) {
59  if ((ti = spa_debug_type_find(NULL, info->parent)) == NULL)
60  return -EINVAL;
61 
62  spa_pod_builder_push_object(b, &f[0], info->parent, id);
63 
64  spa_json_enter(iter, &it[0]);
65  while (spa_json_get_string(&it[0], key, sizeof(key)) > 0) {
66  const struct spa_type_info *pi;
67  if ((l = spa_json_next(&it[0], &v)) <= 0)
68  break;
69  if ((pi = spa_debug_type_find_short(ti->values, key)) != NULL)
70  type = pi->type;
71  else if (!spa_atou32(key, &type, 0))
72  continue;
74  if ((res = spa_json_to_pod_part(b, flags, id, pi, &it[0], v, l)) < 0)
75  return res;
76  }
77  spa_pod_builder_pop(b, &f[0]);
78  }
79  else if (spa_json_is_array(value, len)) {
80  if (info == NULL || info->parent == SPA_TYPE_Struct) {
82  } else {
84  info = info->values;
85  }
86  spa_json_enter(iter, &it[0]);
87  while ((l = spa_json_next(&it[0], &v)) > 0)
88  if ((res = spa_json_to_pod_part(b, flags, id, info, &it[0], v, l)) < 0)
89  return res;
90  spa_pod_builder_pop(b, &f[0]);
91  }
92  else if (spa_json_is_float(value, len)) {
93  float val = 0.0f;
94  spa_json_parse_float(value, len, &val);
95  switch (info ? info->parent : (uint32_t)SPA_TYPE_Struct) {
96  case SPA_TYPE_Bool:
97  spa_pod_builder_bool(b, val >= 0.5f);
98  break;
99  case SPA_TYPE_Id:
100  spa_pod_builder_id(b, val);
101  break;
102  case SPA_TYPE_Int:
103  spa_pod_builder_int(b, val);
104  break;
105  case SPA_TYPE_Long:
106  spa_pod_builder_long(b, val);
107  break;
108  case SPA_TYPE_Struct:
109  if (spa_json_is_int(value, len))
110  spa_pod_builder_int(b, val);
111  else
112  spa_pod_builder_float(b, val);
113  break;
114  case SPA_TYPE_Float:
115  spa_pod_builder_float(b, val);
116  break;
117  case SPA_TYPE_Double:
118  spa_pod_builder_double(b, val);
119  break;
120  default:
122  break;
123  }
124  }
125  else if (spa_json_is_bool(value, len)) {
126  bool val = false;
127  spa_json_parse_bool(value, len, &val);
128  spa_pod_builder_bool(b, val);
129  }
130  else if (spa_json_is_null(value, len)) {
132  }
133  else {
134  char *val = (char*)alloca(len+1);
135  spa_json_parse_stringn(value, len, val, len+1);
136  switch (info ? info->parent : (uint32_t)SPA_TYPE_Struct) {
137  case SPA_TYPE_Id:
138  if ((ti = spa_debug_type_find_short(info->values, val)) != NULL)
139  type = ti->type;
140  else if (!spa_atou32(val, &type, 0))
141  return -EINVAL;
143  break;
144  case SPA_TYPE_Struct:
145  case SPA_TYPE_String:
146  spa_pod_builder_string(b, val);
147  break;
148  default:
150  break;
151  }
152  }
153  return 0;
154 }
155 
156 static inline int spa_json_to_pod(struct spa_pod_builder *b, uint32_t flags,
157  const struct spa_type_info *info, const char *value, int len)
158 {
159  struct spa_json iter;
160  const char *val;
161 
162  spa_json_init(&iter, value, len);
163  if ((len = spa_json_next(&iter, &val)) <= 0)
164  return -EINVAL;
165 
166  return spa_json_to_pod_part(b, flags, info->type, info, &iter, val, len);
167 }
168 
173 #ifdef __cplusplus
174 } /* extern "C" */
175 #endif
176 
177 #endif /* SPA_UTILS_JSON_POD_H */
spa/pod/builder.h
static const struct spa_type_info * spa_debug_type_find(const struct spa_type_info *info, uint32_t type)
Definition: types.h:46
static const struct spa_type_info * spa_debug_type_find_short(const struct spa_type_info *info, const char *name)
Definition: types.h:104
static int spa_json_to_pod(struct spa_pod_builder *b, uint32_t flags, const struct spa_type_info *info, const char *value, int len)
Definition: json-pod.h:161
static int spa_json_to_pod_part(struct spa_pod_builder *b, uint32_t flags, uint32_t id, const struct spa_type_info *info, struct spa_json *iter, const char *value, int len)
Definition: json-pod.h:52
static bool spa_json_is_float(const char *val, int len)
Definition: json.h:257
static int spa_json_parse_float(const char *val, int len, float *result)
Definition: json.h:248
static int spa_json_parse_stringn(const char *val, int len, char *result, int maxlen)
Definition: json.h:363
static void spa_json_enter(struct spa_json *iter, struct spa_json *sub)
Definition: json.h:76
static int spa_json_parse_bool(const char *val, int len, bool *result)
Definition: json.h:321
static int spa_json_get_string(struct spa_json *iter, char *res, int maxlen)
Definition: json.h:431
static bool spa_json_is_bool(const char *val, int len)
Definition: json.h:316
static bool spa_json_is_array(const char *val, int len)
Definition: json.h:232
static bool spa_json_is_null(const char *val, int len)
Definition: json.h:242
static int spa_json_next(struct spa_json *iter, const char **value)
Get the next token.
Definition: json.h:86
static void spa_json_init(struct spa_json *iter, const char *data, size_t size)
Definition: json.h:69
static bool spa_json_is_int(const char *val, int len)
Definition: json.h:291
static int spa_json_is_object(const char *val, int len)
Definition: json.h:222
static int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition: builder.h:470
static int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str)
Definition: builder.h:325
static int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition: builder.h:285
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:188
static int spa_pod_builder_double(struct spa_pod_builder *builder, double val)
Definition: builder.h:294
static int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val)
Definition: builder.h:258
static int spa_pod_builder_none(struct spa_pod_builder *builder)
Definition: builder.h:233
static int spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:392
static int spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:442
static int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val)
Definition: builder.h:249
static int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val)
Definition: builder.h:267
static int spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t id)
Definition: builder.h:455
static int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition: builder.h:276
static bool spa_atou32(const char *str, uint32_t *val, int base)
Convert str to an uint32_t with the given base and store the result in val.
Definition: string.h:148
@ SPA_TYPE_Int
Definition: type.h:54
@ SPA_TYPE_Long
Definition: type.h:55
@ SPA_TYPE_Bool
Definition: type.h:52
@ SPA_TYPE_Float
Definition: type.h:56
@ SPA_TYPE_Double
Definition: type.h:57
@ SPA_TYPE_Id
Definition: type.h:53
@ SPA_TYPE_String
Definition: type.h:58
@ SPA_TYPE_Struct
Definition: type.h:64
spa/utils/json.h
spa/pod/pod.h
spa/utils/string.h
Definition: json.h:58
Definition: builder.h:73
Definition: iter.h:47
Definition: type.h:162
uint32_t type
Definition: type.h:163
uint32_t parent
Definition: type.h:164
const struct spa_type_info * values
Definition: type.h:166
spa/debug/types.h