kjson_putint
, kjson_putintp
,
kjson_putintstr
,
kjson_putintstrp
,
kjson_string_putint
—
put integer content for kcgijson
#include <sys/types.h>
#include <stdarg.h>
#include <stdint.h>
#include <kcgi.h>
#include <kcgijson.h>
enum kcgi_err
kjson_putint
(struct kjsonreq
*req, int64_t v);
enum kcgi_err
kjson_putintp
(struct kjsonreq
*req, const char *name, int64_t
v);
enum kcgi_err
kjson_string_putint
(struct kjsonreq
*req, int64_t v);
enum kcgi_err
kjson_putintstr
(struct kjsonreq
*r, int64_t v);
enum kcgi_err
kjson_putintstrp
(struct kjsonreq
*r, const char *name, int64_t
v);
Write a 64-bit integer v to a context
req initialised with
khtml_open(3).
This formats the value as [-]?[0-9]+
.
The kjson_putint
() and
kjson_putintstr
() forms are for array scopes,
kjson_putintp
() and
kjson_putintstrp
() for objects, and
kjson_string_putint
() for open strings.
Since JavaScript is limited to 53 bits, it's possible that
integers may be truncated with kjson_putint
() and
family. The alternative forms, kjson_putintstr
() and
kjson_putintstrp
(), emit the value within a string.
This allows the JavaScript to parse the integer and handle overflow and
underflow explicitly.
Passing a NULL
value to
name for kjson_putintp
() or
kjson_putintstrp
() is equivalent to calling
kjson_putint
() or
kjson_putintstr
(), respectively.
Returns an enum kcgi_err indicating the error state.
KCGI_OK
- Success (not an error).
KCGI_ENOMEM
- Internal memory allocation failure.
KCGI_HUP
- The output connection has been terminated. For FastCGI connections, the
current connection should be released with
khttp_free(3)
and parse loop reentered.
KCGI_FORM
- The connection is still expecting headers with
khttp_head(3).
Indicates that
khttp_body(3)
did not return with success or was not invoked. For FastCGI connections,
the current connection should be released with
khttp_free(3)
and parse loop reentered.
KCGI_SYSTEM
- Internal system error writing to the output stream.
KCGI_WRITER
- The incorrect form was used for the current scope, for example, an
array-type write within an object.
The following outputs a simple JSON document. It assumes r
is a struct kreq pointer. For brevity, it does not do
any error checking.
khttp_head(r, kresps[KRESP_STATUS],
"%s", khttps[KHTTP_200]);
khttp_head(r, kresps[KRESP_CONTENT_TYPE],
"%s", kmimetypes[KMIME_APP_JSON]);
khttp_body(r);
kjson_open(&req, r);
kjson_obj_open(&req);
kjson_putintp(&req, "bar", 12345);
kjson_arrayp_open(&req, "baz");
kjson_putint(&req, 1)); /* 1 */
kjson_putintstr(&req, 1)); /* "1" */
kjson_close(&req);