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v8/include/libwebsockets/lws-struct.h
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284
v8/include/libwebsockets/lws-struct.h
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/*
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* libwebsockets - small server side websockets and web server implementation
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*
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* Copyright (C) 2010 - 2020 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#if defined(LWS_WITH_STRUCT_SQLITE3)
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#include <sqlite3.h>
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#endif
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typedef enum {
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LSMT_SIGNED,
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LSMT_UNSIGNED,
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LSMT_BOOLEAN,
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LSMT_STRING_CHAR_ARRAY,
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LSMT_STRING_PTR,
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LSMT_LIST,
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LSMT_CHILD_PTR,
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LSMT_SCHEMA,
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LSMT_BLOB_PTR,
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} lws_struct_map_type_eum;
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typedef struct lejp_collation {
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struct lws_dll2 chunks;
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int len;
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char buf[LEJP_STRING_CHUNK + 1];
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} lejp_collation_t;
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typedef struct lws_struct_map {
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const char *colname;
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const struct lws_struct_map *child_map;
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lejp_callback lejp_cb;
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size_t ofs; /* child dll2; points to dll2_owner */
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size_t aux;
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size_t ofs_clist;
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size_t child_map_size;
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lws_struct_map_type_eum type;
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} lws_struct_map_t;
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typedef int (*lws_struct_args_cb)(void *obj, void *cb_arg);
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typedef struct lws_struct_args {
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const lws_struct_map_t *map_st[LEJP_MAX_PARSING_STACK_DEPTH];
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lws_struct_args_cb cb;
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struct lwsac *ac;
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void *cb_arg;
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void *dest;
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size_t dest_len;
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size_t toplevel_dll2_ofs;
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size_t map_entries_st[LEJP_MAX_PARSING_STACK_DEPTH];
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size_t ac_block_size;
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int subtype;
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int top_schema_index;
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/*
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* temp ac used to collate unknown possibly huge strings before final
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* allocation and copy
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*/
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struct lwsac *ac_chunks;
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struct lws_dll2_owner chunks_owner;
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size_t chunks_length;
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} lws_struct_args_t;
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#define LSM_SIGNED(type, name, qname) \
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{ \
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qname, \
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NULL, \
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NULL, \
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offsetof(type, name), \
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sizeof ((type *)0)->name, \
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0, \
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0, \
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LSMT_SIGNED \
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}
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#define LSM_UNSIGNED(type, name, qname) \
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{ \
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qname, \
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NULL, \
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NULL, \
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offsetof(type, name), \
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sizeof ((type *)0)->name, \
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0, \
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0, \
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LSMT_UNSIGNED \
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}
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#define LSM_BOOLEAN(type, name, qname) \
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{ \
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qname, \
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NULL, \
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NULL, \
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offsetof(type, name), \
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sizeof ((type *)0)->name, \
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0, \
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0, \
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LSMT_BOOLEAN \
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}
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#define LSM_CARRAY(type, name, qname) \
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{ \
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qname, \
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NULL, \
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NULL, \
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offsetof(type, name), \
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sizeof (((type *)0)->name), \
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0, \
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0, \
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LSMT_STRING_CHAR_ARRAY \
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}
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#define LSM_STRING_PTR(type, name, qname) \
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{ \
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qname, \
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NULL, \
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NULL, \
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offsetof(type, name), \
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sizeof (((type *)0)->name), \
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0, \
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0, \
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LSMT_STRING_PTR \
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}
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#define LSM_LIST(ptype, pname, ctype, cname, lejp_cb, cmap, qname) \
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{ \
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qname, \
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cmap, \
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lejp_cb, \
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offsetof(ptype, pname), \
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sizeof (ctype), \
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offsetof(ctype, cname), \
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LWS_ARRAY_SIZE(cmap), \
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LSMT_LIST \
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}
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#define LSM_CHILD_PTR(ptype, pname, ctype, lejp_cb, cmap, qname) \
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{ \
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qname, \
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cmap, \
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lejp_cb, \
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offsetof(ptype, pname), \
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sizeof (ctype), \
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0, \
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LWS_ARRAY_SIZE(cmap), \
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LSMT_CHILD_PTR \
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}
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#define LSM_SCHEMA(ctype, lejp_cb, map, schema_name) \
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{ \
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schema_name, \
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map, \
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lejp_cb, \
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0, \
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sizeof (ctype), \
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0, \
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LWS_ARRAY_SIZE(map), \
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LSMT_SCHEMA \
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}
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#define LSM_SCHEMA_DLL2(ctype, cdll2mem, lejp_cb, map, schema_name) \
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{ \
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schema_name, \
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map, \
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lejp_cb, \
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offsetof(ctype, cdll2mem), \
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sizeof (ctype), \
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0, \
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LWS_ARRAY_SIZE(map), \
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LSMT_SCHEMA \
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}
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/*
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* This is just used to create the table schema, it is not part of serialization
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* and deserialization. Blobs should be accessed separately.
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*/
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#define LSM_BLOB_PTR(type, blobptr_name, qname) \
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{ \
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qname, /* JSON item, or sqlite3 column name */ \
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NULL, \
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NULL, \
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offsetof(type, blobptr_name), /* member that points to blob */ \
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sizeof (((type *)0)->blobptr_name), /* size of blob pointer */ \
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0, /* member holding blob len */ \
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0, /* size of blob length member */ \
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LSMT_BLOB_PTR \
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}
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typedef struct lws_struct_serialize_st {
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const struct lws_dll2 *dllpos;
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const lws_struct_map_t *map;
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const char *obj;
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size_t map_entries;
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size_t map_entry;
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size_t size;
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char subsequent;
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char idt;
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} lws_struct_serialize_st_t;
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enum {
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LSSERJ_FLAG_PRETTY = (1 << 0),
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LSSERJ_FLAG_OMIT_SCHEMA = (1 << 1)
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};
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typedef struct lws_struct_serialize {
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lws_struct_serialize_st_t st[LEJP_MAX_PARSING_STACK_DEPTH];
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size_t offset;
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size_t remaining;
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int sp;
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int flags;
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} lws_struct_serialize_t;
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typedef enum {
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LSJS_RESULT_CONTINUE,
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LSJS_RESULT_FINISH,
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LSJS_RESULT_ERROR
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} lws_struct_json_serialize_result_t;
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_json_init_parse(struct lejp_ctx *ctx, lejp_callback cb,
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void *user);
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LWS_VISIBLE LWS_EXTERN signed char
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lws_struct_schema_only_lejp_cb(struct lejp_ctx *ctx, char reason);
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LWS_VISIBLE LWS_EXTERN signed char
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lws_struct_default_lejp_cb(struct lejp_ctx *ctx, char reason);
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LWS_VISIBLE LWS_EXTERN lws_struct_serialize_t *
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lws_struct_json_serialize_create(const lws_struct_map_t *map,
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size_t map_entries, int flags,
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const void *ptoplevel);
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LWS_VISIBLE LWS_EXTERN void
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lws_struct_json_serialize_destroy(lws_struct_serialize_t **pjs);
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LWS_VISIBLE LWS_EXTERN lws_struct_json_serialize_result_t
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lws_struct_json_serialize(lws_struct_serialize_t *js, uint8_t *buf,
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size_t len, size_t *written);
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typedef struct sqlite3 sqlite3;
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_sq3_serialize(sqlite3 *pdb, const lws_struct_map_t *schema,
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lws_dll2_owner_t *owner, uint32_t manual_idx);
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_sq3_deserialize(sqlite3 *pdb, const char *filter, const char *order,
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const lws_struct_map_t *schema, lws_dll2_owner_t *o,
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struct lwsac **ac, int start, int limit);
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_sq3_create_table(sqlite3 *pdb, const lws_struct_map_t *schema);
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_sq3_open(struct lws_context *context, const char *sqlite3_path,
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char create_if_missing, sqlite3 **pdb);
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LWS_VISIBLE LWS_EXTERN int
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lws_struct_sq3_close(sqlite3 **pdb);
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