static int
json_decode_string(js_read_T *reader, typval_T *res, int quote)
{
garray_T ga;
int len;
char_u *p;
int c;
varnumber_T nr;
if (res != NULL)
ga_init2(&ga, 1, 200);
p = reader->js_buf + reader->js_used + 1; /* skip over " or ' */
while (*p != quote)
{
/* The JSON is always expected to be utf-8, thus use utf functions
* here. The string is converted below if needed. */
if (*p == NUL || p[1] == NUL
#ifdef FEAT_MBYTE
|| utf_ptr2len(p) < utf_byte2len(*p)
#endif
)
{
/* Not enough bytes to make a character or end of the string. Get
* more if possible. */
if (reader->js_fill == NULL)
break;
len = (int)(reader->js_end - p);
reader->js_used = (int)(p - reader->js_buf);
if (!reader->js_fill(reader))
break; /* didn't get more */
p = reader->js_buf + reader->js_used;
reader->js_end = reader->js_buf + STRLEN(reader->js_buf);
continue;
}
if (*p == '\\')
{
c = -1;
switch (p[1])
{
case '\\': c = '\\'; break;
case '"': c = '"'; break;
case 'b': c = BS; break;
case 't': c = TAB; break;
case 'n': c = NL; break;
case 'f': c = FF; break;
case 'r': c = CAR; break;
case 'u':
if (reader->js_fill != NULL
&& (int)(reader->js_end - p) < NUMBUFLEN)
{
reader->js_used = (int)(p - reader->js_buf);
if (reader->js_fill(reader))
{
p = reader->js_buf + reader->js_used;
reader->js_end = reader->js_buf
+ STRLEN(reader->js_buf);
}
}
nr = 0;
len = 0;
vim_str2nr(p + 2, NULL, &len,
STR2NR_HEX + STR2NR_FORCE, &nr, NULL, 4);
p += len + 2;
if (0xd800 <= nr && nr <= 0xdfff
&& (int)(reader->js_end - p) >= 6
&& *p == '\\' && *(p+1) == 'u')
{
varnumber_T nr2 = 0;
/* decode surrogate pair: \ud812\u3456 */
len = 0;
vim_str2nr(p + 2, NULL, &len,
STR2NR_HEX + STR2NR_FORCE, &nr2, NULL, 4);
if (0xdc00 <= nr2 && nr2 <= 0xdfff)
{
p += len + 2;
nr = (((nr - 0xd800) << 10) |
((nr2 - 0xdc00) & 0x3ff)) + 0x10000;
}
}
if (res != NULL)
{
#ifdef FEAT_MBYTE
char_u buf[NUMBUFLEN];
buf[utf_char2bytes((int)nr, buf)] = NUL;
ga_concat(&ga, buf);
#else
ga_append(&ga, (int)nr);
#endif
}
break;
default:
/* not a special char, skip over \ */
++p;
continue;
}
if (c > 0)
{
p += 2;
if (res != NULL)
ga_append(&ga, c);
}
}
else
{
#ifdef FEAT_MBYTE
len = utf_ptr2len(p);
#else
len = 1;
#endif
if (res != NULL)
{
if (ga_grow(&ga, len) == FAIL)
{
ga_clear(&ga);
return FAIL;
}
mch_memmove((char *)ga.ga_data + ga.ga_len, p, (size_t)len);
ga.ga_len += len;
}
p += len;
}
}
reader->js_used = (int)(p - reader->js_buf);
if (*p == quote)
{
++reader->js_used;
if (res != NULL)
{
ga_append(&ga, NUL);
res->v_type = VAR_STRING;
#if defined(FEAT_MBYTE) && defined(USE_ICONV)
if (!enc_utf8)
{
vimconv_T conv;
/* Convert the utf-8 string to 'encoding'. */
conv.vc_type = CONV_NONE;
convert_setup(&conv, (char_u*)"utf-8", p_enc);
if (conv.vc_type != CONV_NONE)
{
res->vval.v_string =
string_convert(&conv, ga.ga_data, NULL);
vim_free(ga.ga_data);
}
convert_setup(&conv, NULL, NULL);
}
else
#endif
res->vval.v_string = ga.ga_data;
}
return OK;
}
if (res != NULL)
{
res->v_type = VAR_SPECIAL;
res->vval.v_number = VVAL_NONE;
ga_clear(&ga);
}
return MAYBE;
}
static int
json_decode_string(js_read_T *reader, typval_T *res)
{
garray_T ga;
int len;
char_u *p;
int c;
long nr;
char_u buf[NUMBUFLEN];
if (res != NULL)
ga_init2(&ga, 1, 200);
p = reader->js_buf + reader->js_used + 1; /* skip over " */
while (*p != '"')
{
if (*p == NUL || p[1] == NUL
#ifdef FEAT_MBYTE
|| utf_ptr2len(p) < utf_byte2len(*p)
#endif
)
{
if (reader->js_fill == NULL)
break;
len = (int)(reader->js_end - p);
reader->js_used = (int)(p - reader->js_buf);
if (!reader->js_fill(reader))
break; /* didn't get more */
p = reader->js_buf + reader->js_used;
reader->js_end = reader->js_buf + STRLEN(reader->js_buf);
continue;
}
if (*p == '\\')
{
c = -1;
switch (p[1])
{
case '\\': c = '\\'; break;
case '"': c = '"'; break;
case 'b': c = BS; break;
case 't': c = TAB; break;
case 'n': c = NL; break;
case 'f': c = FF; break;
case 'r': c = CAR; break;
case 'u':
if (reader->js_fill != NULL
&& (int)(reader->js_end - p) < NUMBUFLEN)
{
reader->js_used = (int)(p - reader->js_buf);
if (reader->js_fill(reader))
{
p = reader->js_buf + reader->js_used;
reader->js_end = reader->js_buf
+ STRLEN(reader->js_buf);
}
}
vim_str2nr(p + 2, NULL, &len,
STR2NR_HEX + STR2NR_FORCE, &nr, NULL, 4);
p += len + 2;
if (res != NULL)
{
#ifdef FEAT_MBYTE
buf[(*mb_char2bytes)((int)nr, buf)] = NUL;
ga_concat(&ga, buf);
#else
ga_append(&ga, nr);
#endif
}
break;
default:
/* not a special char, skip over \ */
++p;
continue;
}
if (c > 0)
{
p += 2;
if (res != NULL)
ga_append(&ga, c);
}
}
else
{
len = MB_PTR2LEN(p);
if (res != NULL)
{
if (ga_grow(&ga, len) == FAIL)
{
ga_clear(&ga);
return FAIL;
}
mch_memmove((char *)ga.ga_data + ga.ga_len, p, (size_t)len);
ga.ga_len += len;
}
p += len;
}
}
reader->js_used = (int)(p - reader->js_buf);
if (*p == '"')
{
++reader->js_used;
if (res != NULL)
{
res->v_type = VAR_STRING;
res->vval.v_string = ga.ga_data;
}
return OK;
}
if (res != NULL)
{
res->v_type = VAR_SPECIAL;
res->vval.v_number = VVAL_NONE;
ga_clear(&ga);
}
return MAYBE;
}
