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/*
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* $Id: json_util.c,v 1.4 2006/01/30 23:07:57 mclark Exp $
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*
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* Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
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* Michael Clark <michael@metaparadigm.com>
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See COPYING for details.
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*
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*/
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#include "config.h"
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#undef realloc
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#include "strerror_override.h"
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <limits.h>
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#include <string.h>
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#include <ctype.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif /* HAVE_SYS_TYPES_H */
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif /* HAVE_SYS_STAT_H */
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif /* HAVE_FCNTL_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef WIN32
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# if MSC_VER < 1800
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/* strtoll is available only since Visual Studio 2013 */
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# define strtoll _strtoi64
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# endif
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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# include <io.h>
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#endif /* defined(WIN32) */
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#if !defined(HAVE_OPEN) && defined(WIN32)
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# define open _open
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#endif
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#include "snprintf_compat.h"
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#include "debug.h"
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#include "printbuf.h"
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#include "json_inttypes.h"
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#include "json_object.h"
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#include "json_tokener.h"
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#include "json_util.h"
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static int _json_object_to_fd(int fd, struct json_object *obj, int flags, const char *filename);
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static char _last_err[256] = "";
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const char *json_util_get_last_err()
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{
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if (_last_err[0] == '\0')
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return NULL;
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return _last_err;
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}
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void _json_c_set_last_err(const char *err_fmt, ...)
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{
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va_list ap;
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va_start(ap, err_fmt);
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// Ignore (attempted) overruns from snprintf
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(void)vsnprintf(_last_err, sizeof(_last_err), err_fmt, ap);
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va_end(ap);
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}
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struct json_object* json_object_from_fd(int fd)
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{
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struct printbuf *pb;
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struct json_object *obj;
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char buf[JSON_FILE_BUF_SIZE];
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int ret;
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if(!(pb = printbuf_new())) {
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_json_c_set_last_err("json_object_from_file: printbuf_new failed\n");
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return NULL;
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}
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while((ret = read(fd, buf, JSON_FILE_BUF_SIZE)) > 0) {
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printbuf_memappend(pb, buf, ret);
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}
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if(ret < 0) {
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_json_c_set_last_err("json_object_from_fd: error reading fd %d: %s\n", fd, strerror(errno));
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printbuf_free(pb);
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return NULL;
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}
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obj = json_tokener_parse(pb->buf);
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printbuf_free(pb);
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return obj;
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}
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struct json_object* json_object_from_file(const char *filename)
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{
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struct json_object *obj;
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int fd;
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if((fd = open(filename, O_RDONLY)) < 0) {
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_json_c_set_last_err("json_object_from_file: error opening file %s: %s\n",
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filename, strerror(errno));
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return NULL;
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}
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obj = json_object_from_fd(fd);
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close(fd);
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return obj;
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}
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/* extended "format and write to file" function */
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int json_object_to_file_ext(const char *filename, struct json_object *obj, int flags)
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{
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int fd, ret;
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int saved_errno;
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if (!obj) {
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_json_c_set_last_err("json_object_to_file: object is null\n");
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return -1;
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}
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if ((fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT, 0644)) < 0) {
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_json_c_set_last_err("json_object_to_file: error opening file %s: %s\n",
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filename, strerror(errno));
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return -1;
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}
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ret = _json_object_to_fd(fd, obj, flags, filename);
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saved_errno = errno;
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close(fd);
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errno = saved_errno;
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return ret;
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}
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int json_object_to_fd(int fd, struct json_object *obj, int flags)
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{
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if (!obj) {
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_json_c_set_last_err("json_object_to_fd: object is null\n");
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return -1;
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}
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return _json_object_to_fd(fd, obj, flags, NULL);
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}
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static int _json_object_to_fd(int fd, struct json_object *obj, int flags, const char *filename)
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{
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int ret;
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const char *json_str;
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unsigned int wpos, wsize;
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filename = filename ? filename : "(fd)";
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if (!(json_str = json_object_to_json_string_ext(obj,flags))) {
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return -1;
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}
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wsize = (unsigned int)(strlen(json_str) & UINT_MAX); /* CAW: probably unnecessary, but the most 64bit safe */
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wpos = 0;
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while(wpos < wsize) {
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if((ret = write(fd, json_str + wpos, wsize-wpos)) < 0) {
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_json_c_set_last_err("json_object_to_file: error writing file %s: %s\n",
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filename, strerror(errno));
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return -1;
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}
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/* because of the above check for ret < 0, we can safely cast and add */
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wpos += (unsigned int)ret;
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}
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return 0;
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}
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// backwards compatible "format and write to file" function
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int json_object_to_file(const char *filename, struct json_object *obj)
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{
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return json_object_to_file_ext(filename, obj, JSON_C_TO_STRING_PLAIN);
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}
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int json_parse_double(const char *buf, double *retval)
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{
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char *end;
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*retval = strtod(buf, &end;;
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return end == buf ? 1 : 0;
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}
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int json_parse_int64(const char *buf, int64_t *retval)
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{
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char *end = NULL;
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int64_t val;
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errno = 0;
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val = strtoll(buf, &end, 10);
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if (end != buf)
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*retval = val;
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return ((val == 0 && errno != 0) || (end == buf)) ? 1 : 0;
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}
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#ifndef HAVE_REALLOC
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void* rpl_realloc(void* p, size_t n)
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{
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if (n == 0)
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n = 1;
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if (p == 0)
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return malloc(n);
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return realloc(p, n);
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}
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#endif
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#define NELEM(a) (sizeof(a) / sizeof(a[0]))
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static const char* json_type_name[] = {
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/* If you change this, be sure to update the enum json_type definition too */
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"null",
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"boolean",
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"double",
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"int",
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"object",
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"array",
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"string",
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};
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const char *json_type_to_name(enum json_type o_type)
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{
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int o_type_int = (int)o_type;
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if (o_type_int < 0 || o_type_int >= (int)NELEM(json_type_name))
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{
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_json_c_set_last_err("json_type_to_name: type %d is out of range [0,%d]\n", o_type, NELEM(json_type_name));
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return NULL;
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}
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return json_type_name[o_type];
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}
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