aaec1ef3c5
* Add casts from void* to type of assignment when using malloc
* Add #ifdef __cplusplus guards to all of the headers
* Add typedefs for json_object, json_tokener, array_list, printbuf, lh_table
Michael Clark, <michael@metaparadigm.com>
git-svn-id: http://svn.metaparadigm.com/svn/json-c/trunk@33 327403b1-1117-474d-bef2-5cb71233fd97
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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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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#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 <errno.h>
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#if 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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#if 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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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif /* HAVE_FCNTL_H */
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#if 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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# 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 !HAVE_OPEN && defined(WIN32)
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# define open _open
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#endif
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#include "bits.h"
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#include "debug.h"
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#include "printbuf.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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struct json_object* json_object_from_file(char *filename)
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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 fd, ret;
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if((fd = open(filename, O_RDONLY)) < 0) {
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MC_ERROR("json_object_from_file: error reading file %s: %s\n",
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filename, strerror(errno));
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return (struct json_object*)error_ptr(-1);
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}
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if(!(pb = printbuf_new())) {
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MC_ERROR("json_object_from_file: printbuf_new failed\n");
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return (struct json_object*)error_ptr(-1);
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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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close(fd);
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if(ret < 0) {
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MC_ABORT("json_object_from_file: error reading file %s: %s\n",
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filename, strerror(errno));
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printbuf_free(pb);
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return (struct json_object*)error_ptr(-1);
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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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int json_object_to_file(char *filename, struct json_object *obj)
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{
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const char *json_str;
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int fd, ret;
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unsigned int wpos, wsize;
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if(!obj) {
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MC_ERROR("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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MC_ERROR("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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if(!(json_str = json_object_to_json_string(obj))) { return -1; }
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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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close(fd);
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MC_ERROR("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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close(fd);
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return 0;
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}
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