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Add array_to_json and row_to_json functions.

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Also move the escape_json function from explain.c to json.c where it
seems to belong.

Andrew Dunstan, Reviewd by Abhijit Menon-Sen.
This commit is contained in:
Andrew Dunstan
2012-02-03 12:11:16 -05:00
parent 69e9768e7b
commit 39909d1d39
7 changed files with 579 additions and 48 deletions
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47
src/backend/commands/explain.c
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@ -24,6 +24,7 @@
#include "rewrite/rewriteHandler.h"
#include "tcop/tcopprot.h"
#include "utils/builtins.h"
#include "utils/json.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/snapmgr.h"
@ -99,7 +100,6 @@ static void ExplainDummyGroup(const char *objtype, const char *labelname,
static void ExplainXMLTag(const char *tagname, int flags, ExplainState *es);
static void ExplainJSONLineEnding(ExplainState *es);
static void ExplainYAMLLineStarting(ExplainState *es);
static void escape_json(StringInfo buf, const char *str);
static void escape_yaml(StringInfo buf, const char *str);
@ -2318,51 +2318,6 @@ ExplainYAMLLineStarting(ExplainState *es)
}
}
/*
* Produce a JSON string literal, properly escaping characters in the text.
*/
static void
escape_json(StringInfo buf, const char *str)
{
const char *p;
appendStringInfoCharMacro(buf, '\"');
for (p = str; *p; p++)
{
switch (*p)
{
case '\b':
appendStringInfoString(buf, "\\b");
break;
case '\f':
appendStringInfoString(buf, "\\f");
break;
case '\n':
appendStringInfoString(buf, "\\n");
break;
case '\r':
appendStringInfoString(buf, "\\r");
break;
case '\t':
appendStringInfoString(buf, "\\t");
break;
case '"':
appendStringInfoString(buf, "\\\"");
break;
case '\\':
appendStringInfoString(buf, "\\\\");
break;
default:
if ((unsigned char) *p < ' ')
appendStringInfo(buf, "\\u%04x", (int) *p);
else
appendStringInfoCharMacro(buf, *p);
break;
}
}
appendStringInfoCharMacro(buf, '\"');
}
/*
* YAML is a superset of JSON; unfortuantely, the YAML quoting rules are
* ridiculously complicated -- as documented in sections 5.3 and 7.3.3 of