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util: json: Use virBuffer in JSON->string conversion

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The last step of the conversion involves copying of the generated JSON
into a separate string. We can use a virBuffer to do this as this will
also allow to subsequently use the buffer when we actually need to do
some other formatting of the string.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
This commit is contained in:
Peter Krempa 2019-03-26 14:56:22 +01:00
parent 29ad523018
commit 6a604f759d
1 changed files with 29 additions and 9 deletions
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38
src/util/virjson.c
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@ -28,6 +28,7 @@
#include "virlog.h"
#include "virstring.h"
#include "virutil.h"
#include "virbuffer.h"
#if WITH_YAJL
# include <yajl/yajl_gen.h>
@ -1969,17 +1970,18 @@ virJSONValueToStringOne(virJSONValuePtr object,
}
char *
virJSONValueToString(virJSONValuePtr object,
static int
virJSONValueToBuffer(virJSONValuePtr object,
virBufferPtr buf,
bool pretty)
{
yajl_gen g;
const unsigned char *str;
char *ret = NULL;
yajl_size_t len;
# ifndef WITH_YAJL2
yajl_gen_config conf = { pretty ? 1 : 0, pretty ? " " : " "};
# endif
int ret = -1;
VIR_DEBUG("object=%p", object);
@ -2009,13 +2011,12 @@ virJSONValueToString(virJSONValuePtr object,
goto cleanup;
}
ignore_value(VIR_STRDUP(ret, (const char *)str));
virBufferAdd(buf, (const char *) str, len);
ret = 0;
cleanup:
yajl_gen_free(g);
VIR_DEBUG("result=%s", NULLSTR(ret));
return ret;
}
@ -2030,17 +2031,36 @@ virJSONValueFromString(const char *jsonstring ATTRIBUTE_UNUSED)
}
char *
virJSONValueToString(virJSONValuePtr object ATTRIBUTE_UNUSED,
static int
virJSONValueToBuffer(virJSONValuePtr object ATTRIBUTE_UNUSED,
virBufferPtr buf ATTRIBUTE_UNUSED,
bool pretty ATTRIBUTE_UNUSED)
{
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("No JSON parser implementation is available"));
return NULL;
return -1;
}
#endif
char *
virJSONValueToString(virJSONValuePtr object,
bool pretty)
{
VIR_AUTOCLEAN(virBuffer) buf = VIR_BUFFER_INITIALIZER;
char *ret = NULL;
if (virJSONValueToBuffer(object, &buf, pretty) < 0)
return NULL;
ret = virBufferContentAndReset(&buf);
VIR_DEBUG("result=%s", NULLSTR(ret));
return ret;
}
/**
* virJSONStringReformat:
* @jsonstr: string to reformat