mirror of
https://gitlab.com/arm-research/smarter/smarter-device-manager.git
synced 2024-11-21 18:23:34 +00:00
1096 lines
34 KiB
Go
1096 lines
34 KiB
Go
package yaml
|
|
|
|
import (
|
|
"bytes"
|
|
)
|
|
|
|
// The parser implements the following grammar:
|
|
//
|
|
// stream ::= STREAM-START implicit_document? explicit_document* STREAM-END
|
|
// implicit_document ::= block_node DOCUMENT-END*
|
|
// explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
|
|
// block_node_or_indentless_sequence ::=
|
|
// ALIAS
|
|
// | properties (block_content | indentless_block_sequence)?
|
|
// | block_content
|
|
// | indentless_block_sequence
|
|
// block_node ::= ALIAS
|
|
// | properties block_content?
|
|
// | block_content
|
|
// flow_node ::= ALIAS
|
|
// | properties flow_content?
|
|
// | flow_content
|
|
// properties ::= TAG ANCHOR? | ANCHOR TAG?
|
|
// block_content ::= block_collection | flow_collection | SCALAR
|
|
// flow_content ::= flow_collection | SCALAR
|
|
// block_collection ::= block_sequence | block_mapping
|
|
// flow_collection ::= flow_sequence | flow_mapping
|
|
// block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
|
|
// indentless_sequence ::= (BLOCK-ENTRY block_node?)+
|
|
// block_mapping ::= BLOCK-MAPPING_START
|
|
// ((KEY block_node_or_indentless_sequence?)?
|
|
// (VALUE block_node_or_indentless_sequence?)?)*
|
|
// BLOCK-END
|
|
// flow_sequence ::= FLOW-SEQUENCE-START
|
|
// (flow_sequence_entry FLOW-ENTRY)*
|
|
// flow_sequence_entry?
|
|
// FLOW-SEQUENCE-END
|
|
// flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// flow_mapping ::= FLOW-MAPPING-START
|
|
// (flow_mapping_entry FLOW-ENTRY)*
|
|
// flow_mapping_entry?
|
|
// FLOW-MAPPING-END
|
|
// flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
|
|
// Peek the next token in the token queue.
|
|
func peek_token(parser *yaml_parser_t) *yaml_token_t {
|
|
if parser.token_available || yaml_parser_fetch_more_tokens(parser) {
|
|
return &parser.tokens[parser.tokens_head]
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Remove the next token from the queue (must be called after peek_token).
|
|
func skip_token(parser *yaml_parser_t) {
|
|
parser.token_available = false
|
|
parser.tokens_parsed++
|
|
parser.stream_end_produced = parser.tokens[parser.tokens_head].typ == yaml_STREAM_END_TOKEN
|
|
parser.tokens_head++
|
|
}
|
|
|
|
// Get the next event.
|
|
func yaml_parser_parse(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
// Erase the event object.
|
|
*event = yaml_event_t{}
|
|
|
|
// No events after the end of the stream or error.
|
|
if parser.stream_end_produced || parser.error != yaml_NO_ERROR || parser.state == yaml_PARSE_END_STATE {
|
|
return true
|
|
}
|
|
|
|
// Generate the next event.
|
|
return yaml_parser_state_machine(parser, event)
|
|
}
|
|
|
|
// Set parser error.
|
|
func yaml_parser_set_parser_error(parser *yaml_parser_t, problem string, problem_mark yaml_mark_t) bool {
|
|
parser.error = yaml_PARSER_ERROR
|
|
parser.problem = problem
|
|
parser.problem_mark = problem_mark
|
|
return false
|
|
}
|
|
|
|
func yaml_parser_set_parser_error_context(parser *yaml_parser_t, context string, context_mark yaml_mark_t, problem string, problem_mark yaml_mark_t) bool {
|
|
parser.error = yaml_PARSER_ERROR
|
|
parser.context = context
|
|
parser.context_mark = context_mark
|
|
parser.problem = problem
|
|
parser.problem_mark = problem_mark
|
|
return false
|
|
}
|
|
|
|
// State dispatcher.
|
|
func yaml_parser_state_machine(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
//trace("yaml_parser_state_machine", "state:", parser.state.String())
|
|
|
|
switch parser.state {
|
|
case yaml_PARSE_STREAM_START_STATE:
|
|
return yaml_parser_parse_stream_start(parser, event)
|
|
|
|
case yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE:
|
|
return yaml_parser_parse_document_start(parser, event, true)
|
|
|
|
case yaml_PARSE_DOCUMENT_START_STATE:
|
|
return yaml_parser_parse_document_start(parser, event, false)
|
|
|
|
case yaml_PARSE_DOCUMENT_CONTENT_STATE:
|
|
return yaml_parser_parse_document_content(parser, event)
|
|
|
|
case yaml_PARSE_DOCUMENT_END_STATE:
|
|
return yaml_parser_parse_document_end(parser, event)
|
|
|
|
case yaml_PARSE_BLOCK_NODE_STATE:
|
|
return yaml_parser_parse_node(parser, event, true, false)
|
|
|
|
case yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE:
|
|
return yaml_parser_parse_node(parser, event, true, true)
|
|
|
|
case yaml_PARSE_FLOW_NODE_STATE:
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
|
|
case yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE:
|
|
return yaml_parser_parse_block_sequence_entry(parser, event, true)
|
|
|
|
case yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE:
|
|
return yaml_parser_parse_block_sequence_entry(parser, event, false)
|
|
|
|
case yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE:
|
|
return yaml_parser_parse_indentless_sequence_entry(parser, event)
|
|
|
|
case yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE:
|
|
return yaml_parser_parse_block_mapping_key(parser, event, true)
|
|
|
|
case yaml_PARSE_BLOCK_MAPPING_KEY_STATE:
|
|
return yaml_parser_parse_block_mapping_key(parser, event, false)
|
|
|
|
case yaml_PARSE_BLOCK_MAPPING_VALUE_STATE:
|
|
return yaml_parser_parse_block_mapping_value(parser, event)
|
|
|
|
case yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE:
|
|
return yaml_parser_parse_flow_sequence_entry(parser, event, true)
|
|
|
|
case yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE:
|
|
return yaml_parser_parse_flow_sequence_entry(parser, event, false)
|
|
|
|
case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE:
|
|
return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event)
|
|
|
|
case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE:
|
|
return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event)
|
|
|
|
case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE:
|
|
return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event)
|
|
|
|
case yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE:
|
|
return yaml_parser_parse_flow_mapping_key(parser, event, true)
|
|
|
|
case yaml_PARSE_FLOW_MAPPING_KEY_STATE:
|
|
return yaml_parser_parse_flow_mapping_key(parser, event, false)
|
|
|
|
case yaml_PARSE_FLOW_MAPPING_VALUE_STATE:
|
|
return yaml_parser_parse_flow_mapping_value(parser, event, false)
|
|
|
|
case yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE:
|
|
return yaml_parser_parse_flow_mapping_value(parser, event, true)
|
|
|
|
default:
|
|
panic("invalid parser state")
|
|
}
|
|
}
|
|
|
|
// Parse the production:
|
|
// stream ::= STREAM-START implicit_document? explicit_document* STREAM-END
|
|
// ************
|
|
func yaml_parser_parse_stream_start(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_STREAM_START_TOKEN {
|
|
return yaml_parser_set_parser_error(parser, "did not find expected <stream-start>", token.start_mark)
|
|
}
|
|
parser.state = yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_STREAM_START_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
encoding: token.encoding,
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// implicit_document ::= block_node DOCUMENT-END*
|
|
// *
|
|
// explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
|
|
// *************************
|
|
func yaml_parser_parse_document_start(parser *yaml_parser_t, event *yaml_event_t, implicit bool) bool {
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
// Parse extra document end indicators.
|
|
if !implicit {
|
|
for token.typ == yaml_DOCUMENT_END_TOKEN {
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
|
|
if implicit && token.typ != yaml_VERSION_DIRECTIVE_TOKEN &&
|
|
token.typ != yaml_TAG_DIRECTIVE_TOKEN &&
|
|
token.typ != yaml_DOCUMENT_START_TOKEN &&
|
|
token.typ != yaml_STREAM_END_TOKEN {
|
|
// Parse an implicit document.
|
|
if !yaml_parser_process_directives(parser, nil, nil) {
|
|
return false
|
|
}
|
|
parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE)
|
|
parser.state = yaml_PARSE_BLOCK_NODE_STATE
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_DOCUMENT_START_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
|
|
} else if token.typ != yaml_STREAM_END_TOKEN {
|
|
// Parse an explicit document.
|
|
var version_directive *yaml_version_directive_t
|
|
var tag_directives []yaml_tag_directive_t
|
|
start_mark := token.start_mark
|
|
if !yaml_parser_process_directives(parser, &version_directive, &tag_directives) {
|
|
return false
|
|
}
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_DOCUMENT_START_TOKEN {
|
|
yaml_parser_set_parser_error(parser,
|
|
"did not find expected <document start>", token.start_mark)
|
|
return false
|
|
}
|
|
parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE)
|
|
parser.state = yaml_PARSE_DOCUMENT_CONTENT_STATE
|
|
end_mark := token.end_mark
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_DOCUMENT_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
version_directive: version_directive,
|
|
tag_directives: tag_directives,
|
|
implicit: false,
|
|
}
|
|
skip_token(parser)
|
|
|
|
} else {
|
|
// Parse the stream end.
|
|
parser.state = yaml_PARSE_END_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_STREAM_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
skip_token(parser)
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
|
|
// ***********
|
|
//
|
|
func yaml_parser_parse_document_content(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ == yaml_VERSION_DIRECTIVE_TOKEN ||
|
|
token.typ == yaml_TAG_DIRECTIVE_TOKEN ||
|
|
token.typ == yaml_DOCUMENT_START_TOKEN ||
|
|
token.typ == yaml_DOCUMENT_END_TOKEN ||
|
|
token.typ == yaml_STREAM_END_TOKEN {
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
return yaml_parser_process_empty_scalar(parser, event,
|
|
token.start_mark)
|
|
}
|
|
return yaml_parser_parse_node(parser, event, true, false)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// implicit_document ::= block_node DOCUMENT-END*
|
|
// *************
|
|
// explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
|
|
//
|
|
func yaml_parser_parse_document_end(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
start_mark := token.start_mark
|
|
end_mark := token.start_mark
|
|
|
|
implicit := true
|
|
if token.typ == yaml_DOCUMENT_END_TOKEN {
|
|
end_mark = token.end_mark
|
|
skip_token(parser)
|
|
implicit = false
|
|
}
|
|
|
|
parser.tag_directives = parser.tag_directives[:0]
|
|
|
|
parser.state = yaml_PARSE_DOCUMENT_START_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_DOCUMENT_END_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
implicit: implicit,
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// block_node_or_indentless_sequence ::=
|
|
// ALIAS
|
|
// *****
|
|
// | properties (block_content | indentless_block_sequence)?
|
|
// ********** *
|
|
// | block_content | indentless_block_sequence
|
|
// *
|
|
// block_node ::= ALIAS
|
|
// *****
|
|
// | properties block_content?
|
|
// ********** *
|
|
// | block_content
|
|
// *
|
|
// flow_node ::= ALIAS
|
|
// *****
|
|
// | properties flow_content?
|
|
// ********** *
|
|
// | flow_content
|
|
// *
|
|
// properties ::= TAG ANCHOR? | ANCHOR TAG?
|
|
// *************************
|
|
// block_content ::= block_collection | flow_collection | SCALAR
|
|
// ******
|
|
// flow_content ::= flow_collection | SCALAR
|
|
// ******
|
|
func yaml_parser_parse_node(parser *yaml_parser_t, event *yaml_event_t, block, indentless_sequence bool) bool {
|
|
//defer trace("yaml_parser_parse_node", "block:", block, "indentless_sequence:", indentless_sequence)()
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
if token.typ == yaml_ALIAS_TOKEN {
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
*event = yaml_event_t{
|
|
typ: yaml_ALIAS_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
anchor: token.value,
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
start_mark := token.start_mark
|
|
end_mark := token.start_mark
|
|
|
|
var tag_token bool
|
|
var tag_handle, tag_suffix, anchor []byte
|
|
var tag_mark yaml_mark_t
|
|
if token.typ == yaml_ANCHOR_TOKEN {
|
|
anchor = token.value
|
|
start_mark = token.start_mark
|
|
end_mark = token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ == yaml_TAG_TOKEN {
|
|
tag_token = true
|
|
tag_handle = token.value
|
|
tag_suffix = token.suffix
|
|
tag_mark = token.start_mark
|
|
end_mark = token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
}
|
|
} else if token.typ == yaml_TAG_TOKEN {
|
|
tag_token = true
|
|
tag_handle = token.value
|
|
tag_suffix = token.suffix
|
|
start_mark = token.start_mark
|
|
tag_mark = token.start_mark
|
|
end_mark = token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ == yaml_ANCHOR_TOKEN {
|
|
anchor = token.value
|
|
end_mark = token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
|
|
var tag []byte
|
|
if tag_token {
|
|
if len(tag_handle) == 0 {
|
|
tag = tag_suffix
|
|
tag_suffix = nil
|
|
} else {
|
|
for i := range parser.tag_directives {
|
|
if bytes.Equal(parser.tag_directives[i].handle, tag_handle) {
|
|
tag = append([]byte(nil), parser.tag_directives[i].prefix...)
|
|
tag = append(tag, tag_suffix...)
|
|
break
|
|
}
|
|
}
|
|
if len(tag) == 0 {
|
|
yaml_parser_set_parser_error_context(parser,
|
|
"while parsing a node", start_mark,
|
|
"found undefined tag handle", tag_mark)
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
|
|
implicit := len(tag) == 0
|
|
if indentless_sequence && token.typ == yaml_BLOCK_ENTRY_TOKEN {
|
|
end_mark = token.end_mark
|
|
parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
style: yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
if token.typ == yaml_SCALAR_TOKEN {
|
|
var plain_implicit, quoted_implicit bool
|
|
end_mark = token.end_mark
|
|
if (len(tag) == 0 && token.style == yaml_PLAIN_SCALAR_STYLE) || (len(tag) == 1 && tag[0] == '!') {
|
|
plain_implicit = true
|
|
} else if len(tag) == 0 {
|
|
quoted_implicit = true
|
|
}
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_SCALAR_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
value: token.value,
|
|
implicit: plain_implicit,
|
|
quoted_implicit: quoted_implicit,
|
|
style: yaml_style_t(token.style),
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
if token.typ == yaml_FLOW_SEQUENCE_START_TOKEN {
|
|
// [Go] Some of the events below can be merged as they differ only on style.
|
|
end_mark = token.end_mark
|
|
parser.state = yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
style: yaml_style_t(yaml_FLOW_SEQUENCE_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
if token.typ == yaml_FLOW_MAPPING_START_TOKEN {
|
|
end_mark = token.end_mark
|
|
parser.state = yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
style: yaml_style_t(yaml_FLOW_MAPPING_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
if block && token.typ == yaml_BLOCK_SEQUENCE_START_TOKEN {
|
|
end_mark = token.end_mark
|
|
parser.state = yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
style: yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
if block && token.typ == yaml_BLOCK_MAPPING_START_TOKEN {
|
|
end_mark = token.end_mark
|
|
parser.state = yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_START_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
style: yaml_style_t(yaml_BLOCK_MAPPING_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
if len(anchor) > 0 || len(tag) > 0 {
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_SCALAR_EVENT,
|
|
start_mark: start_mark,
|
|
end_mark: end_mark,
|
|
anchor: anchor,
|
|
tag: tag,
|
|
implicit: implicit,
|
|
quoted_implicit: false,
|
|
style: yaml_style_t(yaml_PLAIN_SCALAR_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
|
|
context := "while parsing a flow node"
|
|
if block {
|
|
context = "while parsing a block node"
|
|
}
|
|
yaml_parser_set_parser_error_context(parser, context, start_mark,
|
|
"did not find expected node content", token.start_mark)
|
|
return false
|
|
}
|
|
|
|
// Parse the productions:
|
|
// block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
|
|
// ******************** *********** * *********
|
|
//
|
|
func yaml_parser_parse_block_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
token := peek_token(parser)
|
|
parser.marks = append(parser.marks, token.start_mark)
|
|
skip_token(parser)
|
|
}
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
if token.typ == yaml_BLOCK_ENTRY_TOKEN {
|
|
mark := token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_BLOCK_ENTRY_TOKEN && token.typ != yaml_BLOCK_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE)
|
|
return yaml_parser_parse_node(parser, event, true, false)
|
|
} else {
|
|
parser.state = yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, mark)
|
|
}
|
|
}
|
|
if token.typ == yaml_BLOCK_END_TOKEN {
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
context_mark := parser.marks[len(parser.marks)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
return yaml_parser_set_parser_error_context(parser,
|
|
"while parsing a block collection", context_mark,
|
|
"did not find expected '-' indicator", token.start_mark)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// indentless_sequence ::= (BLOCK-ENTRY block_node?)+
|
|
// *********** *
|
|
func yaml_parser_parse_indentless_sequence_entry(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
if token.typ == yaml_BLOCK_ENTRY_TOKEN {
|
|
mark := token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_BLOCK_ENTRY_TOKEN &&
|
|
token.typ != yaml_KEY_TOKEN &&
|
|
token.typ != yaml_VALUE_TOKEN &&
|
|
token.typ != yaml_BLOCK_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE)
|
|
return yaml_parser_parse_node(parser, event, true, false)
|
|
}
|
|
parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, mark)
|
|
}
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.start_mark, // [Go] Shouldn't this be token.end_mark?
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// block_mapping ::= BLOCK-MAPPING_START
|
|
// *******************
|
|
// ((KEY block_node_or_indentless_sequence?)?
|
|
// *** *
|
|
// (VALUE block_node_or_indentless_sequence?)?)*
|
|
//
|
|
// BLOCK-END
|
|
// *********
|
|
//
|
|
func yaml_parser_parse_block_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
token := peek_token(parser)
|
|
parser.marks = append(parser.marks, token.start_mark)
|
|
skip_token(parser)
|
|
}
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
if token.typ == yaml_KEY_TOKEN {
|
|
mark := token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_KEY_TOKEN &&
|
|
token.typ != yaml_VALUE_TOKEN &&
|
|
token.typ != yaml_BLOCK_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_VALUE_STATE)
|
|
return yaml_parser_parse_node(parser, event, true, true)
|
|
} else {
|
|
parser.state = yaml_PARSE_BLOCK_MAPPING_VALUE_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, mark)
|
|
}
|
|
} else if token.typ == yaml_BLOCK_END_TOKEN {
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
context_mark := parser.marks[len(parser.marks)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
return yaml_parser_set_parser_error_context(parser,
|
|
"while parsing a block mapping", context_mark,
|
|
"did not find expected key", token.start_mark)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// block_mapping ::= BLOCK-MAPPING_START
|
|
//
|
|
// ((KEY block_node_or_indentless_sequence?)?
|
|
//
|
|
// (VALUE block_node_or_indentless_sequence?)?)*
|
|
// ***** *
|
|
// BLOCK-END
|
|
//
|
|
//
|
|
func yaml_parser_parse_block_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ == yaml_VALUE_TOKEN {
|
|
mark := token.end_mark
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_KEY_TOKEN &&
|
|
token.typ != yaml_VALUE_TOKEN &&
|
|
token.typ != yaml_BLOCK_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_KEY_STATE)
|
|
return yaml_parser_parse_node(parser, event, true, true)
|
|
}
|
|
parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, mark)
|
|
}
|
|
parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// flow_sequence ::= FLOW-SEQUENCE-START
|
|
// *******************
|
|
// (flow_sequence_entry FLOW-ENTRY)*
|
|
// * **********
|
|
// flow_sequence_entry?
|
|
// *
|
|
// FLOW-SEQUENCE-END
|
|
// *****************
|
|
// flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// *
|
|
//
|
|
func yaml_parser_parse_flow_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
token := peek_token(parser)
|
|
parser.marks = append(parser.marks, token.start_mark)
|
|
skip_token(parser)
|
|
}
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
|
|
if !first {
|
|
if token.typ == yaml_FLOW_ENTRY_TOKEN {
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
} else {
|
|
context_mark := parser.marks[len(parser.marks)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
return yaml_parser_set_parser_error_context(parser,
|
|
"while parsing a flow sequence", context_mark,
|
|
"did not find expected ',' or ']'", token.start_mark)
|
|
}
|
|
}
|
|
|
|
if token.typ == yaml_KEY_TOKEN {
|
|
parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_START_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
implicit: true,
|
|
style: yaml_style_t(yaml_FLOW_MAPPING_STYLE),
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
} else if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
}
|
|
}
|
|
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
|
|
*event = yaml_event_t{
|
|
typ: yaml_SEQUENCE_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
//
|
|
// Parse the productions:
|
|
// flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// *** *
|
|
//
|
|
func yaml_parser_parse_flow_sequence_entry_mapping_key(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_VALUE_TOKEN &&
|
|
token.typ != yaml_FLOW_ENTRY_TOKEN &&
|
|
token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
}
|
|
mark := token.end_mark
|
|
skip_token(parser)
|
|
parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, mark)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// ***** *
|
|
//
|
|
func yaml_parser_parse_flow_sequence_entry_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ == yaml_VALUE_TOKEN {
|
|
skip_token(parser)
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
}
|
|
}
|
|
parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
|
|
}
|
|
|
|
// Parse the productions:
|
|
// flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// *
|
|
//
|
|
func yaml_parser_parse_flow_sequence_entry_mapping_end(parser *yaml_parser_t, event *yaml_event_t) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.start_mark, // [Go] Shouldn't this be end_mark?
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// flow_mapping ::= FLOW-MAPPING-START
|
|
// ******************
|
|
// (flow_mapping_entry FLOW-ENTRY)*
|
|
// * **********
|
|
// flow_mapping_entry?
|
|
// ******************
|
|
// FLOW-MAPPING-END
|
|
// ****************
|
|
// flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// * *** *
|
|
//
|
|
func yaml_parser_parse_flow_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
|
|
if first {
|
|
token := peek_token(parser)
|
|
parser.marks = append(parser.marks, token.start_mark)
|
|
skip_token(parser)
|
|
}
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
if token.typ != yaml_FLOW_MAPPING_END_TOKEN {
|
|
if !first {
|
|
if token.typ == yaml_FLOW_ENTRY_TOKEN {
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
} else {
|
|
context_mark := parser.marks[len(parser.marks)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
return yaml_parser_set_parser_error_context(parser,
|
|
"while parsing a flow mapping", context_mark,
|
|
"did not find expected ',' or '}'", token.start_mark)
|
|
}
|
|
}
|
|
|
|
if token.typ == yaml_KEY_TOKEN {
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_VALUE_TOKEN &&
|
|
token.typ != yaml_FLOW_ENTRY_TOKEN &&
|
|
token.typ != yaml_FLOW_MAPPING_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_VALUE_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
} else {
|
|
parser.state = yaml_PARSE_FLOW_MAPPING_VALUE_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
|
|
}
|
|
} else if token.typ != yaml_FLOW_MAPPING_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
}
|
|
}
|
|
|
|
parser.state = parser.states[len(parser.states)-1]
|
|
parser.states = parser.states[:len(parser.states)-1]
|
|
parser.marks = parser.marks[:len(parser.marks)-1]
|
|
*event = yaml_event_t{
|
|
typ: yaml_MAPPING_END_EVENT,
|
|
start_mark: token.start_mark,
|
|
end_mark: token.end_mark,
|
|
}
|
|
skip_token(parser)
|
|
return true
|
|
}
|
|
|
|
// Parse the productions:
|
|
// flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?
|
|
// * ***** *
|
|
//
|
|
func yaml_parser_parse_flow_mapping_value(parser *yaml_parser_t, event *yaml_event_t, empty bool) bool {
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if empty {
|
|
parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
|
|
}
|
|
if token.typ == yaml_VALUE_TOKEN {
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_MAPPING_END_TOKEN {
|
|
parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_KEY_STATE)
|
|
return yaml_parser_parse_node(parser, event, false, false)
|
|
}
|
|
}
|
|
parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE
|
|
return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
|
|
}
|
|
|
|
// Generate an empty scalar event.
|
|
func yaml_parser_process_empty_scalar(parser *yaml_parser_t, event *yaml_event_t, mark yaml_mark_t) bool {
|
|
*event = yaml_event_t{
|
|
typ: yaml_SCALAR_EVENT,
|
|
start_mark: mark,
|
|
end_mark: mark,
|
|
value: nil, // Empty
|
|
implicit: true,
|
|
style: yaml_style_t(yaml_PLAIN_SCALAR_STYLE),
|
|
}
|
|
return true
|
|
}
|
|
|
|
var default_tag_directives = []yaml_tag_directive_t{
|
|
{[]byte("!"), []byte("!")},
|
|
{[]byte("!!"), []byte("tag:yaml.org,2002:")},
|
|
}
|
|
|
|
// Parse directives.
|
|
func yaml_parser_process_directives(parser *yaml_parser_t,
|
|
version_directive_ref **yaml_version_directive_t,
|
|
tag_directives_ref *[]yaml_tag_directive_t) bool {
|
|
|
|
var version_directive *yaml_version_directive_t
|
|
var tag_directives []yaml_tag_directive_t
|
|
|
|
token := peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
|
|
for token.typ == yaml_VERSION_DIRECTIVE_TOKEN || token.typ == yaml_TAG_DIRECTIVE_TOKEN {
|
|
if token.typ == yaml_VERSION_DIRECTIVE_TOKEN {
|
|
if version_directive != nil {
|
|
yaml_parser_set_parser_error(parser,
|
|
"found duplicate %YAML directive", token.start_mark)
|
|
return false
|
|
}
|
|
if token.major != 1 || token.minor != 1 {
|
|
yaml_parser_set_parser_error(parser,
|
|
"found incompatible YAML document", token.start_mark)
|
|
return false
|
|
}
|
|
version_directive = &yaml_version_directive_t{
|
|
major: token.major,
|
|
minor: token.minor,
|
|
}
|
|
} else if token.typ == yaml_TAG_DIRECTIVE_TOKEN {
|
|
value := yaml_tag_directive_t{
|
|
handle: token.value,
|
|
prefix: token.prefix,
|
|
}
|
|
if !yaml_parser_append_tag_directive(parser, value, false, token.start_mark) {
|
|
return false
|
|
}
|
|
tag_directives = append(tag_directives, value)
|
|
}
|
|
|
|
skip_token(parser)
|
|
token = peek_token(parser)
|
|
if token == nil {
|
|
return false
|
|
}
|
|
}
|
|
|
|
for i := range default_tag_directives {
|
|
if !yaml_parser_append_tag_directive(parser, default_tag_directives[i], true, token.start_mark) {
|
|
return false
|
|
}
|
|
}
|
|
|
|
if version_directive_ref != nil {
|
|
*version_directive_ref = version_directive
|
|
}
|
|
if tag_directives_ref != nil {
|
|
*tag_directives_ref = tag_directives
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Append a tag directive to the directives stack.
|
|
func yaml_parser_append_tag_directive(parser *yaml_parser_t, value yaml_tag_directive_t, allow_duplicates bool, mark yaml_mark_t) bool {
|
|
for i := range parser.tag_directives {
|
|
if bytes.Equal(value.handle, parser.tag_directives[i].handle) {
|
|
if allow_duplicates {
|
|
return true
|
|
}
|
|
return yaml_parser_set_parser_error(parser, "found duplicate %TAG directive", mark)
|
|
}
|
|
}
|
|
|
|
// [Go] I suspect the copy is unnecessary. This was likely done
|
|
// because there was no way to track ownership of the data.
|
|
value_copy := yaml_tag_directive_t{
|
|
handle: make([]byte, len(value.handle)),
|
|
prefix: make([]byte, len(value.prefix)),
|
|
}
|
|
copy(value_copy.handle, value.handle)
|
|
copy(value_copy.prefix, value.prefix)
|
|
parser.tag_directives = append(parser.tag_directives, value_copy)
|
|
return true
|
|
}
|