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json: learn to parse uint64 numbers

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Switch strtoll() usage to qemu_strtoi64() helper while at it.

Add a few tests for large numbers.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170607163635.17635-11-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2017-06-07 20:36:02 +04:00 • committed by Markus Armbruster
parent 61a8f418b2
commit 2bc7cfea09
3 changed files with 76 additions and 8 deletions
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36
qobject/json-parser.c
View file

@ -12,6 +12,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qapi/qmp/types.h"
@ -472,6 +473,13 @@ static QObject *parse_escape(JSONParserContext *ctxt, va_list *ap)
} else if (!strcmp(token->str, "%lld") ||
!strcmp(token->str, "%I64d")) {
return QOBJECT(qnum_from_int(va_arg(*ap, long long)));
} else if (!strcmp(token->str, "%u")) {
return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned int)));
} else if (!strcmp(token->str, "%lu")) {
return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long)));
} else if (!strcmp(token->str, "%llu") ||
!strcmp(token->str, "%I64u")) {
return QOBJECT(qnum_from_uint(va_arg(*ap, unsigned long long)));
} else if (!strcmp(token->str, "%s")) {
return QOBJECT(qstring_from_str(va_arg(*ap, const char *)));
} else if (!strcmp(token->str, "%f")) {
@ -493,21 +501,33 @@ static QObject *parse_literal(JSONParserContext *ctxt)
case JSON_INTEGER: {
/*
* Represent JSON_INTEGER as QNUM_I64 if possible, else as
* QNUM_DOUBLE. Note that strtoll() fails with ERANGE when
* it's not possible.
* QNUM_U64, else as QNUM_DOUBLE. Note that qemu_strtoi64()
* and qemu_strtou64() fail with ERANGE when it's not
* possible.
*
* qnum_get_int() will then work for any signed 64-bit
* JSON_INTEGER, and qnum_get_double() both for any
* JSON_INTEGER and any JSON_FLOAT (with precision loss for
* integers beyond 53 bits)
* JSON_INTEGER, qnum_get_uint() for any unsigned 64-bit
* integer, and qnum_get_double() both for any JSON_INTEGER
* and any JSON_FLOAT (with precision loss for integers beyond
* 53 bits)
*/
int ret;
int64_t value;
uint64_t uvalue;
errno = 0; /* strtoll doesn't set errno on success */
value = strtoll(token->str, NULL, 10);
if (errno != ERANGE) {
ret = qemu_strtoi64(token->str, NULL, 10, &value);
if (!ret) {
return QOBJECT(qnum_from_int(value));
}
assert(ret == -ERANGE);
if (token->str[0] != '-') {
ret = qemu_strtou64(token->str, NULL, 10, &uvalue);
if (!ret) {
return QOBJECT(qnum_from_uint(uvalue));
}
assert(ret == -ERANGE);
}
/* fall through to JSON_FLOAT */
}
case JSON_FLOAT: