static int json_get_key_size(struct json_parse_state_s *state) {
if (json_parse_flags_allow_unquoted_keys & state->flags_bitset) {
// if we are allowing unquoted keys, first grok for a comma...
if ('"' == state->src[state->offset]) {
// ... if we got a comma, just parse the key as a string as normal
return json_get_string_size(state);
} else {
while ((state->offset < state->size) &&
is_valid_unquoted_key_char(state->src[state->offset])) {
state->offset++;
state->data_size++;
}
// one more byte for null terminator ending the string!
state->data_size++;
state->dom_size += sizeof(struct json_string_s);
return 0;
}
} else {
// we are only allowed to have quoted keys, so just parse a string!
return json_get_string_size(state);
}
}
static int json_get_value_size(struct json_parse_state_s* state) {
if (json_skip_whitespace(state)) {
// consumed the whole buffer when we expected a value!
return 1;
}
state->dom_size += sizeof(struct json_value_s);
switch (state->src[state->offset]) {
case '"':
return json_get_string_size(state);
case '{':
return json_get_object_size(state);
case '[':
return json_get_array_size(state);
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return json_get_number_size(state);
default:
if ((state->offset + 4) < state->size &&
't' == state->src[state->offset + 0] &&
'r' == state->src[state->offset + 1] &&
'u' == state->src[state->offset + 2] &&
'e' == state->src[state->offset + 3]) {
state->offset += 4;
return 0;
} else if ((state->offset + 5) < state->size &&
'f' == state->src[state->offset + 0] &&
'a' == state->src[state->offset + 1] &&
'l' == state->src[state->offset + 2] &&
's' == state->src[state->offset + 3] &&
'e' == state->src[state->offset + 4]) {
state->offset += 5;
return 0;
} else if ((state->offset + 4) < state->size &&
'n' == state->src[state->offset + 0] &&
'u' == state->src[state->offset + 1] &&
'l' == state->src[state->offset + 2] &&
'l' == state->src[state->offset + 3]) {
state->offset += 4;
return 0;
}
// invalid value!
return 1;
}
}
static int json_get_object_size(struct json_parse_state_s* state) {
size_t elements = 0;
if ('{' != state->src[state->offset]) {
// expected object to begin with leading '{'
return 1;
}
// skip leading '{'
state->offset++;
state->dom_size += sizeof(struct json_object_s);
while (state->offset < state->size) {
if (json_skip_whitespace(state)) {
// reached end of buffer before object was complete!
return 1;
}
if ('}' == state->src[state->offset]) {
// skip trailing '}'
state->offset++;
// finished the object!
break;
}
// if we parsed at least once element previously, grok for a comma
if (0 < elements) {
if (',' != state->src[state->offset]) {
// expected a comma where there was none!
return 1;
}
// skip comma
state->offset++;
if (json_skip_whitespace(state)) {
// reached end of buffer before object was complete!
return 1;
}
}
if (json_get_string_size(state)) {
// string parsing failed!
return 1;
}
if (json_skip_whitespace(state)) {
// reached end of buffer before object was complete!
return 1;
}
if (':' != state->src[state->offset]) {
// colon seperating name/value pair was missing!
return 1;
}
// skip colon
state->offset++;
if (json_skip_whitespace(state)) {
// reached end of buffer before object was complete!
return 1;
}
if (json_get_value_size(state)) {
// value parsing failed!
return 1;
}
// successfully parsed a name/value pair!
elements++;
}
state->dom_size += sizeof(struct json_string_s) * elements;
state->dom_size += sizeof(struct json_value_s) * elements;
state->dom_size += sizeof(struct json_object_element_s) * elements;
return 0;
}
static int json_get_value_size(struct json_parse_state_s *state,
int is_global_object) {
if (is_global_object) {
state->dom_size += sizeof(struct json_value_s);
return json_get_object_size(state, /* is_global_object = */ 1);
} else {
state->dom_size += sizeof(struct json_value_s);
if (json_skip_all_skippables(state)) {
state->error = json_parse_error_premature_end_of_buffer;
return 1;
}
switch (state->src[state->offset]) {
case '"':
return json_get_string_size(state);
case '{':
return json_get_object_size(state, /* is_global_object = */ 0);
case '[':
return json_get_array_size(state);
case '+':
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '.':
return json_get_number_size(state);
default:
if ((state->offset + 4) <= state->size &&
't' == state->src[state->offset + 0] &&
'r' == state->src[state->offset + 1] &&
'u' == state->src[state->offset + 2] &&
'e' == state->src[state->offset + 3]) {
state->offset += 4;
return 0;
} else if ((state->offset + 5) <= state->size &&
'f' == state->src[state->offset + 0] &&
'a' == state->src[state->offset + 1] &&
'l' == state->src[state->offset + 2] &&
's' == state->src[state->offset + 3] &&
'e' == state->src[state->offset + 4]) {
state->offset += 5;
return 0;
} else if ((state->offset + 4) <= state->size &&
'n' == state->src[state->offset + 0] &&
'u' == state->src[state->offset + 1] &&
'l' == state->src[state->offset + 2] &&
'l' == state->src[state->offset + 3]) {
state->offset += 4;
return 0;
}
// invalid value!
state->error = json_parse_error_invalid_value;
return 1;
}
}
}
