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Add strbuf JSON helper functions

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This commit is contained in:
Andrew Bettison 2013-11-07 23:39:53 +10:30
parent d337542067
commit 9ecf9891fb
2 changed files with 59 additions and 0 deletions
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52
strbuf_helpers.c
View File

@ -36,6 +36,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include <sys/uio.h>
#include "http_server.h"
#include "strbuf_helpers.h"
#include "str.h"
static inline strbuf _toprint(strbuf sb, char c)
{
@ -414,6 +415,57 @@ strbuf strbuf_append_quoted_string(strbuf sb, const char *str)
return sb;
}
strbuf strbuf_json_null(strbuf sb)
{
strbuf_puts(sb, "null");
return sb;
}
strbuf strbuf_json_string(strbuf sb, const char *str)
{
if (str) {
strbuf_putc(sb, '"');
for (; *str; ++str) {
if (*str == '"' || *str == '\\') {
strbuf_putc(sb, '\\');
strbuf_putc(sb, *str);
}
else if (*str == '\b')
strbuf_puts(sb, "\\b");
else if (*str == '\f')
strbuf_puts(sb, "\\f");
else if (*str == '\n')
strbuf_puts(sb, "\\n");
else if (*str == '\r')
strbuf_puts(sb, "\\r");
else if (*str == '\t')
strbuf_puts(sb, "\\t");
else if (iscntrl(*str))
strbuf_sprintf(sb, "\\u%04X", (unsigned char) *str);
else
strbuf_putc(sb, *str);
}
strbuf_putc(sb, '"');
} else
strbuf_json_null(sb);
return sb;
}
strbuf strbuf_json_hex(strbuf sb, const unsigned char *buf, size_t len)
{
if (buf) {
strbuf_putc(sb, '"');
size_t i;
for (i = 0; i != len; ++i) {
strbuf_putc(sb, hexdigit[*buf >> 4]);
strbuf_putc(sb, hexdigit[*buf++ & 0xf]);
}
strbuf_putc(sb, '"');
} else
strbuf_json_null(sb);
return sb;
}
strbuf strbuf_append_http_ranges(strbuf sb, const struct http_range *ranges, unsigned nels)
{
unsigned i;

7
strbuf_helpers.h
View File

@ -151,6 +151,13 @@ strbuf strbuf_append_iovec(strbuf sb, const struct iovec *iov, int iovcnt);
*/
strbuf strbuf_append_quoted_string(strbuf sb, const char *str);
/* Append various JSON elements.
* @author Andrew Bettison <andrew@servalproject.com>
*/
strbuf strbuf_json_null(strbuf sb);
strbuf strbuf_json_string(strbuf sb, const char *str);
strbuf strbuf_json_hex(strbuf sb, const unsigned char *buf, size_t len);
/* Append a representation of a struct http_range[] array.
* @author Andrew Bettison <andrew@servalproject.com>
*/