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* Add int64 support. Two new functions json_object_net_int64 and

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json_object_get_int64. Binary compatibility preserved.
    Eric Haszlakiewicz, EHASZLA at transunion com
    Rui Miguel Silva Seabra, rms at 1407 dot org



git-svn-id: http://svn.metaparadigm.com/svn/json-c/trunk@56 327403b1-1117-474d-bef2-5cb71233fd97
This commit is contained in:
Michael Clark
2010-10-06 16:39:20 +00:00
parent 88ded9ceb8
commit c4dceae1c5
23 changed files with 569 additions and 40 deletions
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65
json_util.c
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@@ -17,6 +17,7 @@
#include <limits.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
@@ -48,6 +49,7 @@
#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"
@@ -120,3 +122,66 @@ int json_object_to_file(char *filename, struct json_object *obj)
close(fd);
return 0;
}
int json_parse_int64(const char *buf, int64_t *retval)
{
int64_t num64;
if (sscanf(buf, "%" SCNd64, &num64) != 1)
{
printf("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
while (*buf_skip_space == '0' && *buf_skip_space)
buf_skip_space++;
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(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;
}