mirror of
https://git.sr.ht/~cismonx/bookmarkfs
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50f05d2bd3
- Do not check __STDC_HOSTED__. - Do not use atomic builtins. - Do not use thread-local storage for PRNG state.
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/**
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* bookmarkfs/src/json.h
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* ----
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*
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* Copyright (C) 2024 CismonX <admin@cismon.net>
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*
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* This file is part of BookmarkFS.
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*
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* BookmarkFS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* BookmarkFS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with BookmarkFS. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BOOKMARKFS_JSON_H_
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#define BOOKMARKFS_JSON_H_
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#include <string.h>
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// No need for atomic json_incref()/json_decref(),
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// since we're only using Jansson in a single thread.
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#include <jansson_config.h>
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#undef JSON_HAVE_ATOMIC_BUILTINS
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#define JSON_HAVE_ATOMIC_BUILTINS 0
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#undef JSON_HAVE_SYNC_BUILTINS
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#define JSON_HAVE_SYNC_BUILTINS 0
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#include <jansson.h>
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// The following helper macros are useful with literal keys,
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// since the compiler can optimize out the strlen() call.
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#define json_object_sget(obj, key) json_object_getn(obj, key, strlen(key))
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#define json_object_sset(obj, key, value) \
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json_object_setn_nocheck(obj, key, strlen(key), value)
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#define json_object_sset_new(obj, key, value) \
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json_object_setn_new_nocheck(obj, key, strlen(key), value)
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#define json_sstring(str) json_stringn_nocheck(str, strlen(str))
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#define json_object_foreach_iter(obj, iter) \
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for (void *iter = json_object_iter(obj); iter != NULL; \
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iter = json_object_iter_next(obj, iter))
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#define json_object_sset_copy(obj, key, value) \
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json_object_sset_new(obj, key, json_copy(value))
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/**
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* Find the offset of `needle` in `haystack`.
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*
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* If `haystack` is not an array, or `needle` cannot be found
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* within `haystack`, function behavior is undefined.
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*/
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size_t
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json_array_search (
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json_t const *haystack,
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json_t const *needle
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);
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/**
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* Like json_dump_file(), but opens file with openat().
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*
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* If `name` is not the last path component,
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* function behavior is undefined.
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*
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* Writes to a temporary file first, so that failing do dump
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* does not corrupt existing file.
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*/
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int
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json_dump_file_at (
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json_t const *json,
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int dirfd,
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char const *name,
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size_t flags
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);
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/**
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* Like json_dumpfd(), using a buffer to reduce system call overhead.
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*
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* NOTE: As of Jansson 2.14, json_dumpfd() does not buffer writes.
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*/
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int
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json_dumpfd_ex (
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json_t const *json,
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int fd,
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size_t flags
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);
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/**
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* Like json_load_file(), but opens file with openat().
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*/
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json_t *
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json_load_file_at (
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int dirfd,
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char const *name,
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size_t flags
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);
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#endif /* !defined(BOOKMARKFS_JSON_H_) */
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