/*
* dup_json_string --
* Like strdup, but escape any characters that are special for JSON.
* The result will be embedded in a JSON string.
*/
static int
dup_json_string(const char *str, char **result)
{
size_t left, nchars;
const char *p;
char *q;
nchars = 0;
for (p = str; *p; p++, nchars++)
nchars += __wt_json_unpack_char(*p, NULL, 0, false);
q = malloc(nchars + 1);
if (q == NULL)
return (1);
*result = q;
left = nchars;
for (p = str; *p; p++, nchars++) {
nchars = __wt_json_unpack_char(*p, (u_char *)q, left, false);
left -= nchars;
q += nchars;
}
*q = '\0';
return (0);
}
static size_t
__logrec_json_unpack_str(char *dest, size_t destlen, const char *src,
size_t srclen)
{
size_t total;
size_t n;
total = 0;
while (srclen > 0) {
n = __wt_json_unpack_char(*src++, (u_char *)dest, destlen, 0);
srclen--;
if (n > destlen)
destlen = 0;
else {
destlen -= n;
dest += n;
}
total += n;
}
if (destlen > 0)
*dest = '\0';
return (total + 1);
}
/*
* __json_unpack_put --
* Calculate the size of a packed byte string as formatted for JSON.
*/
static size_t
__json_unpack_put(WT_SESSION_IMPL *session, void *voidpv,
u_char *buf, size_t bufsz, WT_CONFIG_ITEM *name)
{
WT_PACK_VALUE *pv;
const u_char *p, *end;
size_t s, n;
pv = (WT_PACK_VALUE *)voidpv;
s = (size_t)snprintf((char *)buf, bufsz, "\"%.*s\" : ",
(int)name->len, name->str);
if (s <= bufsz) {
bufsz -= s;
buf += s;
}
else
bufsz = 0;
switch (pv->type) {
case 'x':
return (0);
case 's':
case 'S':
/* Account for '"' quote in front and back. */
s += 2;
p = (const u_char *)pv->u.s;
if (bufsz > 0) {
*buf++ = '"';
bufsz--;
}
if (pv->type == 's' || pv->havesize) {
end = p + pv->size;
for (; p < end; p++) {
n = __wt_json_unpack_char(
*p, buf, bufsz, false);
if (n > bufsz)
bufsz = 0;
else {
bufsz -= n;
buf += n;
}
s += n;
}
} else
for (; *p; p++) {
n = __wt_json_unpack_char(
*p, buf, bufsz, false);
if (n > bufsz)
bufsz = 0;
else {
bufsz -= n;
buf += n;
}
s += n;
}
if (bufsz > 0)
*buf++ = '"';
return (s);
case 'U':
case 'u':
s += 2;
p = (const u_char *)pv->u.item.data;
end = p + pv->u.item.size;
if (bufsz > 0) {
*buf++ = '"';
bufsz--;
}
for (; p < end; p++) {
n = __wt_json_unpack_char(*p, buf, bufsz, true);
if (n > bufsz)
bufsz = 0;
else {
bufsz -= n;
buf += n;
}
s += n;
}
if (bufsz > 0)
*buf++ = '"';
return (s);
case 'b':
case 'h':
case 'i':
case 'l':
case 'q':
return (s +
(size_t)snprintf((char *)buf, bufsz, "%" PRId64, pv->u.i));
case 'B':
case 't':
case 'H':
case 'I':
case 'L':
case 'Q':
case 'r':
case 'R':
return (s +
(size_t)snprintf((char *)buf, bufsz, "%" PRId64, pv->u.u));
}
__wt_err(session, EINVAL, "unknown pack-value type: %c", (int)pv->type);
return ((size_t)-1);
}
