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- /*
- This file is part of GNUnet
- Copyright (C) 2014, 2015, 2016 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
-
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file json/json_helper.c
- * @brief functions to generate specifciations for JSON parsing
- * @author Florian Dold
- * @author Benedikt Mueller
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_json_lib.h"
- /**
- * End of a parser specification.
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_end ()
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = NULL,
- .cleaner = NULL,
- .cls = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to fixed size data
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_fixed_data (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- const char *enc;
- unsigned int len;
- if (NULL == (enc = json_string_value (root)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- len = strlen (enc);
- if (((len * 5) / 8) != spec->ptr_size)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (GNUNET_OK !=
- GNUNET_STRINGS_string_to_data (enc,
- len,
- spec->ptr,
- spec->ptr_size))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
- /**
- * Variable size object (in network byte order, encoded using Crockford
- * Base32hex encoding).
- *
- * @param name name of the JSON field
- * @param[out] obj pointer where to write the data, must have @a size bytes
- * @param size number of bytes expected in @a obj
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_fixed (const char *name,
- void *obj,
- size_t size)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_fixed_data,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = obj,
- .ptr_size = size,
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to variable size data
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_variable_data (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- const char *str;
- size_t size;
- void *data;
- int res;
- str = json_string_value (root);
- if (NULL == str)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- size = (strlen (str) * 5) / 8;
- if (size >= 1024)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- data = GNUNET_malloc (size);
- res = GNUNET_STRINGS_string_to_data (str,
- strlen (str),
- data,
- size);
- if (GNUNET_OK != res)
- {
- GNUNET_break_op (0);
- GNUNET_free (data);
- return GNUNET_SYSERR;
- }
- *(void**) spec->ptr = data;
- *spec->size_ptr = size;
- return GNUNET_OK;
- }
- /**
- * Cleanup data left from parsing variable size data
- *
- * @param cls closure, NULL
- * @param[out] spec where to free the data
- */
- static void
- clean_variable_data (void *cls,
- struct GNUNET_JSON_Specification *spec)
- {
- if (0 != *spec->size_ptr)
- {
- GNUNET_free (*(void **) spec->ptr);
- *(void**) spec->ptr = NULL;
- *spec->size_ptr = 0;
- }
- }
- /**
- * Variable size object (in network byte order, encoded using
- * Crockford Base32hex encoding).
- *
- * @param name name of the JSON field
- * @param[out] obj pointer where to write the data, will be allocated
- * @param[out] size where to store the number of bytes allocated for @a obj
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_varsize (const char *name,
- void **obj,
- size_t *size)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_variable_data,
- .cleaner = &clean_variable_data,
- .cls = NULL,
- .field = name,
- .ptr = obj,
- .ptr_size = 0,
- .size_ptr = size
- };
- *obj = NULL;
- *size = 0;
- return ret;
- }
- /**
- * Parse given JSON object to string.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_string (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- const char *str;
- str = json_string_value (root);
- if (NULL == str)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *(const char **) spec->ptr = str;
- return GNUNET_OK;
- }
- /**
- * The expected field stores a string.
- *
- * @param name name of the JSON field
- * @param strptr where to store a pointer to the field
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_string (const char *name,
- const char **strptr)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_string,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = strptr,
- .ptr_size = 0,
- .size_ptr = NULL
- };
- *strptr = NULL;
- return ret;
- }
- /**
- * Parse given JSON object to a JSON object. (Yes, trivial.)
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_object (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- if (! (json_is_object (root) || json_is_array (root)) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- json_incref (root);
- *(json_t **) spec->ptr = root;
- return GNUNET_OK;
- }
- /**
- * Cleanup data left from parsing JSON object.
- *
- * @param cls closure, NULL
- * @param[out] spec where to free the data
- */
- static void
- clean_object (void *cls,
- struct GNUNET_JSON_Specification *spec)
- {
- json_t **ptr = (json_t **) spec->ptr;
- if (NULL != *ptr)
- {
- json_decref (*ptr);
- *ptr = NULL;
- }
- }
- /**
- * JSON object.
- *
- * @param name name of the JSON field
- * @param[out] jsonp where to store the JSON found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_json (const char *name,
- json_t **jsonp)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_object,
- .cleaner = &clean_object,
- .cls = NULL,
- .field = name,
- .ptr = jsonp,
- .ptr_size = 0,
- .size_ptr = NULL
- };
- *jsonp = NULL;
- return ret;
- }
- /**
- * Parse given JSON object to a uint8_t.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_u8 (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- json_int_t val;
- uint8_t *up = spec->ptr;
- if (! json_is_integer (root))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- val = json_integer_value (root);
- if ( (0 > val) || (val > UINT8_MAX) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *up = (uint8_t) val;
- return GNUNET_OK;
- }
- /**
- * 8-bit integer.
- *
- * @param name name of the JSON field
- * @param[out] u8 where to store the integer found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_uint8 (const char *name,
- uint8_t *u8)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_u8,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = u8,
- .ptr_size = sizeof (uint8_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to a uint16_t.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_u16 (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- json_int_t val;
- uint16_t *up = spec->ptr;
- if (! json_is_integer (root))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- val = json_integer_value (root);
- if ( (0 > val) || (val > UINT16_MAX) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *up = (uint16_t) val;
- return GNUNET_OK;
- }
- /**
- * 16-bit integer.
- *
- * @param name name of the JSON field
- * @param[out] u16 where to store the integer found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_uint16 (const char *name,
- uint16_t *u16)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_u16,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = u16,
- .ptr_size = sizeof (uint16_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to a uint32_t.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_u32 (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- json_int_t val;
- uint32_t *up = spec->ptr;
- if (! json_is_integer (root))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- val = json_integer_value (root);
- if ( (0 > val) || (val > UINT32_MAX) )
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *up = (uint32_t) val;
- return GNUNET_OK;
- }
- /**
- * 32-bit integer.
- *
- * @param name name of the JSON field
- * @param[out] u32 where to store the integer found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_uint32 (const char *name,
- uint32_t *u32)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_u32,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = u32,
- .ptr_size = sizeof (uint32_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to a uint8_t.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_u64 (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- json_int_t val;
- uint64_t *up = spec->ptr;
- if (! json_is_integer (root))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- val = json_integer_value (root);
- *up = (uint64_t) val;
- return GNUNET_OK;
- }
- /**
- * 64-bit integer.
- *
- * @param name name of the JSON field
- * @param[out] u64 where to store the integer found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_uint64 (const char *name,
- uint64_t *u64)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_u64,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = u64,
- .ptr_size = sizeof (uint64_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /* ************ GNUnet-specific parser specifications ******************* */
- /**
- * Parse given JSON object to absolute time.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_abs_time (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_TIME_Absolute *abs = spec->ptr;
- const char *val;
- unsigned long long int tval;
- val = json_string_value (root);
- if (NULL == val)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if ( (0 == strcasecmp (val,
- "/forever/")) ||
- (0 == strcasecmp (val,
- "/end of time/")) ||
- (0 == strcasecmp (val,
- "/never/")) )
- {
- *abs = GNUNET_TIME_UNIT_FOREVER_ABS;
- return GNUNET_OK;
- }
- if (1 != sscanf (val,
- "/Date(%llu)/",
- &tval))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Absolute */
- abs->abs_value_us = tval * 1000LL * 1000LL;
- if ( (abs->abs_value_us) / 1000LL / 1000LL != tval)
- {
- /* Integer overflow */
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
- /**
- * Absolute time.
- *
- * @param name name of the JSON field
- * @param[out] at where to store the absolute time found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_absolute_time (const char *name,
- struct GNUNET_TIME_Absolute *at)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_abs_time,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = at,
- .ptr_size = sizeof (uint64_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to absolute time.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_abs_time_nbo (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_TIME_AbsoluteNBO *abs = spec->ptr;
- const char *val;
- unsigned long long int tval;
- struct GNUNET_TIME_Absolute a;
- val = json_string_value (root);
- if (NULL == val)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if ( (0 == strcasecmp (val,
- "/forever/")) ||
- (0 == strcasecmp (val,
- "/end of time/")) ||
- (0 == strcasecmp (val,
- "/never/")) )
- {
- *abs = GNUNET_TIME_absolute_hton (GNUNET_TIME_UNIT_FOREVER_ABS);
- return GNUNET_OK;
- }
- if (1 != sscanf (val,
- "/Date(%llu)/",
- &tval))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Absolute */
- a.abs_value_us = tval * 1000LL * 1000LL;
- if ( (a.abs_value_us) / 1000LL / 1000LL != tval)
- {
- /* Integer overflow */
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *abs = GNUNET_TIME_absolute_hton (a);
- return GNUNET_OK;
- }
- /**
- * Absolute time in network byte order.
- *
- * @param name name of the JSON field
- * @param[out] at where to store the absolute time found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_absolute_time_nbo (const char *name,
- struct GNUNET_TIME_AbsoluteNBO *at)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_abs_time_nbo,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = at,
- .ptr_size = sizeof (uint64_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to relative time.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_rel_time (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_TIME_Relative *rel = spec->ptr;
- const char *val;
- unsigned long long int tval;
- val = json_string_value (root);
- if (NULL == val)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if ( (0 == strcasecmp (val,
- "/forever/")) )
- {
- *rel = GNUNET_TIME_UNIT_FOREVER_REL;
- return GNUNET_OK;
- }
- if (1 != sscanf (val,
- "/Delay(%llu)/",
- &tval))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- /* Time is in seconds in JSON, but in microseconds in GNUNET_TIME_Relative */
- rel->rel_value_us = tval * 1000LL * 1000LL;
- if ( (rel->rel_value_us) / 1000LL / 1000LL != tval)
- {
- /* Integer overflow */
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
- /**
- * Relative time.
- *
- * @param name name of the JSON field
- * @param[out] rt where to store the relative time found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_relative_time (const char *name,
- struct GNUNET_TIME_Relative *rt)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_rel_time,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = rt,
- .ptr_size = sizeof (uint64_t),
- .size_ptr = NULL
- };
- return ret;
- }
- /**
- * Parse given JSON object to RSA public key.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_rsa_public_key (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_CRYPTO_RsaPublicKey **pk = spec->ptr;
- const char *enc;
- char *buf;
- size_t len;
- size_t buf_len;
- if (NULL == (enc = json_string_value (root)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- len = strlen (enc);
- buf_len = (len * 5) / 8;
- buf = GNUNET_malloc (buf_len);
- if (GNUNET_OK !=
- GNUNET_STRINGS_string_to_data (enc,
- len,
- buf,
- buf_len))
- {
- GNUNET_break_op (0);
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- if (NULL == (*pk = GNUNET_CRYPTO_rsa_public_key_decode (buf,
- buf_len)))
- {
- GNUNET_break_op (0);
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- GNUNET_free (buf);
- return GNUNET_OK;
- }
- /**
- * Cleanup data left from parsing RSA public key.
- *
- * @param cls closure, NULL
- * @param[out] spec where to free the data
- */
- static void
- clean_rsa_public_key (void *cls,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_CRYPTO_RsaPublicKey **pk = spec->ptr;
- if (NULL != *pk)
- {
- GNUNET_CRYPTO_rsa_public_key_free (*pk);
- *pk = NULL;
- }
- }
- /**
- * Specification for parsing an RSA public key.
- *
- * @param name name of the JSON field
- * @param pk where to store the RSA key found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_rsa_public_key (const char *name,
- struct GNUNET_CRYPTO_RsaPublicKey **pk)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_rsa_public_key,
- .cleaner = &clean_rsa_public_key,
- .cls = NULL,
- .field = name,
- .ptr = pk,
- .ptr_size = 0,
- .size_ptr = NULL
- };
- *pk = NULL;
- return ret;
- }
- /**
- * Parse given JSON object to RSA signature.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_rsa_signature (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_CRYPTO_RsaSignature **sig = spec->ptr;
- size_t size;
- const char *str;
- int res;
- void *buf;
- str = json_string_value (root);
- if (NULL == str)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- size = (strlen (str) * 5) / 8;
- buf = GNUNET_malloc (size);
- res = GNUNET_STRINGS_string_to_data (str,
- strlen (str),
- buf,
- size);
- if (GNUNET_OK != res)
- {
- GNUNET_free (buf);
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- if (NULL == (*sig = GNUNET_CRYPTO_rsa_signature_decode (buf,
- size)))
- {
- GNUNET_break_op (0);
- GNUNET_free (buf);
- return GNUNET_SYSERR;
- }
- GNUNET_free (buf);
- return GNUNET_OK;
- }
- /**
- * Cleanup data left from parsing RSA signature.
- *
- * @param cls closure, NULL
- * @param[out] spec where to free the data
- */
- static void
- clean_rsa_signature (void *cls,
- struct GNUNET_JSON_Specification *spec)
- {
- struct GNUNET_CRYPTO_RsaSignature **sig = spec->ptr;
- if (NULL != *sig)
- {
- GNUNET_CRYPTO_rsa_signature_free (*sig);
- *sig = NULL;
- }
- }
- /**
- * Specification for parsing an RSA signature.
- *
- * @param name name of the JSON field
- * @param sig where to store the RSA signature found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_rsa_signature (const char *name,
- struct GNUNET_CRYPTO_RsaSignature **sig)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_rsa_signature,
- .cleaner = &clean_rsa_signature,
- .cls = NULL,
- .field = name,
- .ptr = sig,
- .ptr_size = 0,
- .size_ptr = NULL
- };
- *sig = NULL;
- return ret;
- }
- /**
- * Parse given JSON object to an int as a boolean.
- *
- * @param cls closure, NULL
- * @param root the json object representing data
- * @param[out] spec where to write the data
- * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
- */
- static int
- parse_boolean (void *cls,
- json_t *root,
- struct GNUNET_JSON_Specification *spec)
- {
- int *bp = spec->ptr;
- if (! json_is_boolean (root))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
- *bp = json_boolean_value (root) ? GNUNET_YES : GNUNET_NO;
- return GNUNET_OK;
- }
- /**
- * Boolean (true mapped to GNUNET_YES, false mapped to GNUNET_NO).
- *
- * @param name name of the JSON field
- * @param[out] boolean where to store the boolean found under @a name
- */
- struct GNUNET_JSON_Specification
- GNUNET_JSON_spec_boolean (const char *name,
- int *boolean)
- {
- struct GNUNET_JSON_Specification ret = {
- .parser = &parse_boolean,
- .cleaner = NULL,
- .cls = NULL,
- .field = name,
- .ptr = boolean,
- .ptr_size = sizeof (int),
- .size_ptr = NULL
- };
- return ret;
- }
- /* end of json_helper.c */
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