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/*
* $Id: json_util.c,v 1.4 2006/01/30 23:07:57 mclark Exp $
*
* Copyright (c) 2004, 2005 Metaparadigm Pte. Ltd.
* Michael Clark <michael@metaparadigm.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See COPYING for details.
*
*/
#include "config.h"
#undef realloc
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#if HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif /* HAVE_SYS_STAT_H */
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif /* HAVE_FCNTL_H */
#if HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# include <io.h>
#endif /* defined(WIN32) */
#if !HAVE_OPEN && defined(WIN32)
# define open _open
#endif
#include "bits.h"
#include "debug.h"
#include "printbuf.h"
#include "json_inttypes.h"
#include "json_object.h"
#include "json_tokener.h"
#include "json_util.h"
struct json_object* json_object_from_file(const char *filename)
{
struct printbuf *pb;
struct json_object *obj;
char buf[JSON_FILE_BUF_SIZE];
int fd, ret;
if((fd = open(filename, O_RDONLY)) < 0) {
MC_ERROR("json_object_from_file: error reading file %s: %s\n",
filename, strerror(errno));
return (struct json_object*)error_ptr(-1);
}
if(!(pb = printbuf_new())) {
close(fd);
MC_ERROR("json_object_from_file: printbuf_new failed\n");
return (struct json_object*)error_ptr(-1);
}
while((ret = read(fd, buf, JSON_FILE_BUF_SIZE)) > 0) {
printbuf_memappend(pb, buf, ret);
}
close(fd);
if(ret < 0) {
MC_ABORT("json_object_from_file: error reading file %s: %s\n",
filename, strerror(errno));
printbuf_free(pb);
return (struct json_object*)error_ptr(-1);
}
obj = json_tokener_parse(pb->buf);
printbuf_free(pb);
return obj;
}
int json_object_to_file(char *filename, struct json_object *obj)
{
const char *json_str;
int fd, ret;
unsigned int wpos, wsize;
if(!obj) {
MC_ERROR("json_object_to_file: object is null\n");
return -1;
}
if((fd = open(filename, O_WRONLY | O_TRUNC | O_CREAT, 0644)) < 0) {
MC_ERROR("json_object_to_file: error opening file %s: %s\n",
filename, strerror(errno));
return -1;
}
if(!(json_str = json_object_to_json_string(obj))) {
close(fd);
return -1;
}
wsize = (unsigned int)(strlen(json_str) & UINT_MAX); /* CAW: probably unnecessary, but the most 64bit safe */
wpos = 0;
while(wpos < wsize) {
if((ret = write(fd, json_str + wpos, wsize-wpos)) < 0) {
close(fd);
MC_ERROR("json_object_to_file: error writing file %s: %s\n",
filename, strerror(errno));
return -1;
}
/* because of the above check for ret < 0, we can safely cast and add */
wpos += (unsigned int)ret;
}
close(fd);
return 0;
}
int json_parse_int64(const char *buf, int64_t *retval)
{
int64_t num64;
if (sscanf(buf, "%" SCNd64, &num64) != 1)
{
MC_DEBUG("Failed to parse, sscanf != 1\n");
return 1;
}
const char *buf_skip_space = buf;
int orig_has_neg = 0;
// Skip leading spaces
while (isspace((int)*buf_skip_space) && *buf_skip_space)
buf_skip_space++;
if (*buf_skip_space == '-')
{
buf_skip_space++;
orig_has_neg = 1;
}
// Skip leading zeros, but keep at least one digit
while (buf_skip_space[0] == '0' && buf_skip_space[1] != '\0')
buf_skip_space++;
if (buf_skip_space[0] == '0' && buf_skip_space[1] == '\0')
orig_has_neg = 0; // "-0" is the same as just plain "0"
if (errno != ERANGE)
{
char buf_cmp[100];
char *buf_cmp_start = buf_cmp;
int recheck_has_neg = 0;
snprintf(buf_cmp_start, sizeof(buf_cmp), "%" PRId64, num64);
if (*buf_cmp_start == '-')
{
recheck_has_neg = 1;
buf_cmp_start++;
}
// No need to skip leading spaces or zeros here.
int buf_cmp_len = strlen(buf_cmp_start);
/**
* If the sign is different, or
* some of the digits are different, or
* there is another digit present in the original string
* then we NOT successfully parsed the value.
*/
if (orig_has_neg != recheck_has_neg ||
strncmp(buf_skip_space, buf_cmp_start, strlen(buf_cmp_start)) != 0 ||
(strlen(buf_skip_space) != buf_cmp_len &&
isdigit((int)buf_skip_space[buf_cmp_len])
)
)
{
errno = ERANGE;
}
}
if (errno == ERANGE)
{
if (orig_has_neg)
num64 = INT64_MIN;
else
num64 = INT64_MAX;
}
*retval = num64;
return 0;
}
#if HAVE_REALLOC == 0
void* rpl_realloc(void* p, size_t n)
{
if (n == 0)
n = 1;
if (p == 0)
return malloc(n);
return realloc(p, n);
}
#endif
#define NELEM(a) (sizeof(a) / sizeof(a[0]))
static const char* json_type_name[] = {
/* If you change this, be sure to update the enum json_type definition too */
"null",
"boolean",
"double",
"int",
"object",
"array",
"string",
};
const char *json_type_to_name(enum json_type o_type)
{
if (o_type < 0 || o_type >= NELEM(json_type_name))
{
MC_ERROR("json_type_to_name: type %d is out of range [0,%d]\n", o_type, NELEM(json_type_name));
return NULL;
}
return json_type_name[o_type];
}