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json-parser: propagate error from parser 

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-06-01 12:14:50 -05:00
parent d5ec4f27c3
commit ef749d07e7
5 changed files with 25 additions and 7 deletions
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4
Makefile
View File

@ -134,14 +134,14 @@ qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx
check-qint.o check-qstring.o check-qdict.o check-qlist.o check-qfloat.o check-qjson.o: $(GENERATED_HEADERS)
CHECK_PROG_DEPS = qemu-malloc.o $(oslib-obj-y) $(trace-obj-y)
CHECK_PROG_DEPS = qemu-malloc.o $(oslib-obj-y) $(trace-obj-y) qemu-tool.o
check-qint: check-qint.o qint.o $(CHECK_PROG_DEPS)
check-qstring: check-qstring.o qstring.o $(CHECK_PROG_DEPS)
check-qdict: check-qdict.o qdict.o qfloat.o qint.o qstring.o qbool.o qlist.o $(CHECK_PROG_DEPS)
check-qlist: check-qlist.o qlist.o qint.o $(CHECK_PROG_DEPS)
check-qfloat: check-qfloat.o qfloat.o $(CHECK_PROG_DEPS)
check-qjson: check-qjson.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o qjson.o json-streamer.o json-lexer.o json-parser.o $(CHECK_PROG_DEPS)
check-qjson: check-qjson.o qfloat.o qint.o qdict.o qstring.o qlist.o qbool.o qjson.o json-streamer.o json-lexer.o json-parser.o error.o qerror.o qemu-error.o $(CHECK_PROG_DEPS)
QEMULIBS=libhw32 libhw64 libuser libdis libdis-user

4
Makefile.objs
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@ -2,7 +2,7 @@
# QObject
qobject-obj-y = qint.o qstring.o qdict.o qlist.o qfloat.o qbool.o
qobject-obj-y += qjson.o json-lexer.o json-streamer.o json-parser.o
qobject-obj-y += qerror.o
qobject-obj-y += qerror.o error.o
#######################################################################
# oslib-obj-y is code depending on the OS (win32 vs posix)
@ -59,7 +59,7 @@ fsdev-obj-$(CONFIG_VIRTFS) += $(addprefix fsdev/, $(fsdev-nested-y))
# system emulation, i.e. a single QEMU executable should support all
# CPUs and machines.
common-obj-y = $(block-obj-y) blockdev.o error.o
common-obj-y = $(block-obj-y) blockdev.o
common-obj-y += $(net-obj-y)
common-obj-y += $(qobject-obj-y)
common-obj-$(CONFIG_LINUX) += $(fsdev-obj-$(CONFIG_LINUX))

19
json-parser.c
View File

@ -22,9 +22,11 @@
#include "qbool.h"
#include "json-parser.h"
#include "json-lexer.h"
#include "qerror.h"
typedef struct JSONParserContext
{
Error *err;
} JSONParserContext;
#define BUG_ON(cond) assert(!(cond))
@ -95,11 +97,15 @@ static void GCC_FMT_ATTR(3, 4) parse_error(JSONParserContext *ctxt,
QObject *token, const char *msg, ...)
{
va_list ap;
char message[1024];
va_start(ap, msg);
fprintf(stderr, "parse error: ");
vfprintf(stderr, msg, ap);
fprintf(stderr, "\n");
vsnprintf(message, sizeof(message), msg, ap);
va_end(ap);
if (ctxt->err) {
error_free(ctxt->err);
ctxt->err = NULL;
}
error_set(&ctxt->err, QERR_JSON_PARSE_ERROR, message);
}
/**
@ -564,6 +570,11 @@ static QObject *parse_value(JSONParserContext *ctxt, QList **tokens, va_list *ap
}
QObject *json_parser_parse(QList *tokens, va_list *ap)
{
return json_parser_parse_err(tokens, ap, NULL);
}
QObject *json_parser_parse_err(QList *tokens, va_list *ap, Error **errp)
{
JSONParserContext ctxt = {};
QList *working = qlist_copy(tokens);
@ -573,5 +584,7 @@ QObject *json_parser_parse(QList *tokens, va_list *ap)
QDECREF(working);
error_propagate(errp, ctxt.err);
return result;
}

2
json-parser.h
View File

@ -16,7 +16,9 @@
#include "qemu-common.h"
#include "qlist.h"
#include "error.h"
QObject *json_parser_parse(QList *tokens, va_list *ap);
QObject *json_parser_parse_err(QList *tokens, va_list *ap, Error **errp);
#endif

3
qerror.h
View File

@ -121,6 +121,9 @@ QError *qobject_to_qerror(const QObject *obj);
#define QERR_JSON_PARSING \
"{ 'class': 'JSONParsing', 'data': {} }"
#define QERR_JSON_PARSE_ERROR \
"{ 'class': 'JSONParseError', 'data': { 'message': %s } }"
#define QERR_KVM_MISSING_CAP \
"{ 'class': 'KVMMissingCap', 'data': { 'capability': %s, 'feature': %s } }"