184 lines
6.9 KiB
C
184 lines
6.9 KiB
C
#ifndef LIGHTNING_COMMON_JSON_H
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#define LIGHTNING_COMMON_JSON_H
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#include "config.h"
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#include <ccan/crypto/sha256/sha256.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <common/errcode.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#define JSMN_STRICT 1
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# include <external/jsmn/jsmn.h>
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struct json_escape;
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struct json_stream;
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struct timeabs;
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struct timespec;
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/* Include " if it's a string. */
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const char *json_tok_full(const char *buffer, const jsmntok_t *t);
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/* Include " if it's a string. */
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int json_tok_full_len(const jsmntok_t *t);
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/* Is this a string equal to str? */
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bool json_tok_streq(const char *buffer, const jsmntok_t *tok, const char *str);
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/* Allocate a tal string copy */
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char *json_strdup(const tal_t *ctx, const char *buffer, const jsmntok_t *tok);
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/* Decode a hex-encoded binary */
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u8 *json_tok_bin_from_hex(const tal_t *ctx, const char *buffer, const jsmntok_t *tok);
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/* Extract number from this (may be a string, or a number literal) */
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bool json_to_number(const char *buffer, const jsmntok_t *tok,
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unsigned int *num);
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/* Extract number from this (may be a string, or a number literal) */
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bool json_to_u64(const char *buffer, const jsmntok_t *tok,
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uint64_t *num);
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/* Extract signed 64 bit integer from this (may be a string, or a number literal) */
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bool json_to_s64(const char *buffer, const jsmntok_t *tok, s64 *num);
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/* Extract number from this (may be a string, or a number literal) */
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bool json_to_u32(const char *buffer, const jsmntok_t *tok,
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uint32_t *num);
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/* Extract number from this (may be a string, or a number literal) */
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bool json_to_u16(const char *buffer, const jsmntok_t *tok,
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uint16_t *num);
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bool json_to_sha256(const char *buffer, const jsmntok_t *tok, struct sha256 *dest);
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/*
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* Extract a non-negative (either 0 or positive) floating-point number from this
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* (must be a number literal), multiply it by 1 million and return it as an
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* integer. Any fraction smaller than 0.000001 is ignored.
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*/
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bool json_to_millionths(const char *buffer, const jsmntok_t *tok,
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u64 *millionths);
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/* Extract signed integer from this (may be a string, or a number literal) */
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bool json_to_int(const char *buffer, const jsmntok_t *tok, int *num);
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/* Extract an error code from this (may be a string, or a number literal) */
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bool json_to_errcode(const char *buffer, const jsmntok_t *tok, errcode_t *errcode);
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/* Extract boolean from this */
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bool json_to_bool(const char *buffer, const jsmntok_t *tok, bool *b);
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/* Is this a number? [0..9]+ */
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bool json_tok_is_num(const char *buffer, const jsmntok_t *tok);
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/* Is this the null primitive? */
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bool json_tok_is_null(const char *buffer, const jsmntok_t *tok);
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/* Returns next token with same parent (WARNING: slow!). */
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const jsmntok_t *json_next(const jsmntok_t *tok);
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/* Get top-level member. */
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const jsmntok_t *json_get_member(const char *buffer, const jsmntok_t tok[],
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const char *label);
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/* Get index'th array member. */
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const jsmntok_t *json_get_arr(const jsmntok_t tok[], size_t index);
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/* If input is complete and valid, return tokens. */
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jsmntok_t *json_parse_input(const tal_t *ctx,
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const char *input, int len, bool *valid);
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/* Convert a jsmntype_t enum to a human readable string. */
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const char *jsmntype_to_string(jsmntype_t t);
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/* Print a json value for debugging purposes. */
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void json_tok_print(const char *buffer, const jsmntok_t *params);
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/* Return a copy of a json value as an array. */
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jsmntok_t *json_tok_copy(const tal_t *ctx, const jsmntok_t *tok);
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/*
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* Remove @num json values from a json array or object @obj. @tok points
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* to the first value to remove. The array @tokens will be resized.
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*/
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void json_tok_remove(jsmntok_t **tokens,
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jsmntok_t *obj_or_array, const jsmntok_t *tok, size_t num);
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/* Guide is a string with . for members, [] around indexes. */
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const jsmntok_t *json_delve(const char *buffer,
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const jsmntok_t *tok,
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const char *guide);
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/* Iterator macro for array: i is counter, t is token ptr, arr is JSMN_ARRAY */
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#define json_for_each_arr(i, t, arr) \
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for (i = 0, t = (arr) + 1; i < (arr)->size; t = json_next(t), i++)
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/* Iterator macro for object: i is counter, t is token ptr (t+1 is
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* contents of obj member), obj is JSMN_OBJECT */
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#define json_for_each_obj(i, t, obj) \
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for (i = 0, t = (obj) + 1; i < (obj)->size; t = json_next(t+1), i++)
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. Turns
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* any non-printable chars into JSON escapes, but leaves existing escapes alone.
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*/
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void json_add_string(struct json_stream *result, const char *fieldname, const char *value);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. String must
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* already be JSON escaped as necessary. */
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void json_add_escaped_string(struct json_stream *result,
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const char *fieldname,
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const struct json_escape *esc TAKES);
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/* '"fieldname" : literal' or 'literal' if fieldname is NULL*/
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void json_add_literal(struct json_stream *result, const char *fieldname,
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const char *literal, int len);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_num(struct json_stream *result, const char *fieldname,
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unsigned int value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u64(struct json_stream *result, const char *fieldname,
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uint64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s64(struct json_stream *result, const char *fieldname,
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int64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u32(struct json_stream *result, const char *fieldname,
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uint32_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s32(struct json_stream *result, const char *fieldname,
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int32_t value);
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/* '"fieldname" : true|false' or 'true|false' if fieldname is NULL */
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void json_add_bool(struct json_stream *result, const char *fieldname,
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bool value);
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/* '"fieldname" : null' or 'null' if fieldname is NULL */
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void json_add_null(struct json_stream *stream, const char *fieldname);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex(struct json_stream *result, const char *fieldname,
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const void *data, size_t len);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex_talarr(struct json_stream *result,
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const char *fieldname,
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const tal_t *data);
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void json_add_timeabs(struct json_stream *result, const char *fieldname,
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struct timeabs t);
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/* used in log.c and notification.c*/
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void json_add_time(struct json_stream *result, const char *fieldname,
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struct timespec ts);
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/* Add any json token */
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void json_add_tok(struct json_stream *result, const char *fieldname,
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const jsmntok_t *tok, const char *buffer);
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/* Add an error code */
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void json_add_errcode(struct json_stream *result, const char *fieldname,
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errcode_t code);
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#endif /* LIGHTNING_COMMON_JSON_H */
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