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Diffstat (limited to '')
| -rw-r--r-- | lib/json.h | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/lib/json.h b/lib/json.h new file mode 100644 index 0000000..4763803 --- /dev/null +++ b/lib/json.h @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* json-c wrapper + * Copyright (C) 2015 Cumulus Networks, Inc. + */ + +#ifndef _QUAGGA_JSON_H +#define _QUAGGA_JSON_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "command.h" +#include "printfrr.h" +#include <json-c/json.h> + +/* + * FRR style JSON iteration. + * Usage: JSON_FOREACH(...) { ... } + */ +#define JSON_FOREACH(jo, joi, join) \ + /* struct json_object *jo; */ \ + /* struct json_object_iterator joi; */ \ + /* struct json_object_iterator join; */ \ + for ((joi) = json_object_iter_begin((jo)), \ + (join) = json_object_iter_end((jo)); \ + json_object_iter_equal(&(joi), &(join)) == 0; \ + json_object_iter_next(&(joi))) + +#define JSON_OBJECT_NEW_ARRAY(json_func, fields, n) \ + ({ \ + struct json_object *_json_array = json_object_new_array(); \ + for (int _i = 0; _i < (n); _i++) \ + json_object_array_add(_json_array, \ + (json_func)((fields)[_i])); \ + (_json_array); \ + }) + +extern bool use_json(const int argc, struct cmd_token *argv[]); +extern void json_object_string_add(struct json_object *obj, const char *key, + const char *s); +extern void json_object_int_add(struct json_object *obj, const char *key, + int64_t i); +void json_object_boolean_add(struct json_object *obj, const char *key, + bool val); + +extern void json_object_double_add(struct json_object *obj, const char *key, + double i); +extern void json_object_boolean_false_add(struct json_object *obj, + const char *key); +extern void json_object_boolean_true_add(struct json_object *obj, + const char *key); +extern struct json_object *json_object_lock(struct json_object *obj); +extern void json_object_free(struct json_object *obj); +extern void json_array_string_add(json_object *json, const char *str); + +/* printfrr => json helpers */ + +PRINTFRR(3, 0) +extern void json_object_string_addv(struct json_object *obj, const char *key, + const char *fmt, va_list args); +PRINTFRR(3, 4) +static inline void json_object_string_addf(struct json_object *obj, + const char *key, const char *fmt, + ...) +{ + va_list args; + + va_start(args, fmt); + json_object_string_addv(obj, key, fmt, args); + va_end(args); +} + +PRINTFRR(2, 0) +extern void json_array_string_addv(json_object *json, const char *fmt, + va_list args); +PRINTFRR(2, 3) +static inline void json_array_string_addf(struct json_object *obj, + const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + json_array_string_addv(obj, fmt, args); + va_end(args); +} + +PRINTFRR(1, 0) +extern struct json_object *json_object_new_stringv(const char *fmt, + va_list args); +PRINTFRR(1, 2) +static inline struct json_object *json_object_new_stringf(const char *fmt, ...) +{ + struct json_object *ret; + va_list args; + + va_start(args, fmt); + ret = json_object_new_stringv(fmt, args); + va_end(args); + + return ret; +} + +/* NOTE: argument order differs! (due to varargs) + * json_object_object_add(parent, key, child) + * json_object_object_addv(parent, child, key, va) + * json_object_object_addf(parent, child, key, ...) + * (would be weird to have the child inbetween the format string and args) + */ +PRINTFRR(3, 0) +extern void json_object_object_addv(struct json_object *parent, + struct json_object *child, + const char *keyfmt, va_list args); +PRINTFRR(3, 4) +static inline void json_object_object_addf(struct json_object *parent, + struct json_object *child, + const char *keyfmt, ...) +{ + va_list args; + + va_start(args, keyfmt); + json_object_object_addv(parent, child, keyfmt, args); + va_end(args); +} + +#define JSON_STR "JavaScript Object Notation\n" + +/* NOTE: json-c lib has following commit 316da85 which + * handles escape of forward slash. + * This allows prefix "20.0.14.0\/24":{ + * to "20.0.14.0/24":{ some platforms do not have + * latest copy of json-c where defining below macro. + */ + +#ifndef JSON_C_TO_STRING_NOSLASHESCAPE + +/** + * Don't escape forward slashes. + */ +#define JSON_C_TO_STRING_NOSLASHESCAPE (1<<4) +#endif + +#ifdef __cplusplus +} +#endif + +#endif /* _QUAGGA_JSON_H */ |