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emitter.c
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emitter.c
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#include "yaml_private.h"
/*
* Flush the buffer if needed.
*/
#define FLUSH(emitter) \
((emitter->buffer.pointer+5 < emitter->buffer.end) \
|| yaml_emitter_flush(emitter))
/*
* Put a character to the output buffer.
*/
#define PUT(emitter,value) \
(FLUSH(emitter) \
&& (*(emitter->buffer.pointer++) = (yaml_char_t)(value), \
emitter->column ++, \
1))
/*
* Put a line break to the output buffer.
*/
#define PUT_BREAK(emitter) \
(FLUSH(emitter) \
&& ((emitter->line_break == YAML_CR_BREAK ? \
(*(emitter->buffer.pointer++) = (yaml_char_t) '\r') : \
emitter->line_break == YAML_LN_BREAK ? \
(*(emitter->buffer.pointer++) = (yaml_char_t) '\n') : \
emitter->line_break == YAML_CRLN_BREAK ? \
(*(emitter->buffer.pointer++) = (yaml_char_t) '\r', \
*(emitter->buffer.pointer++) = (yaml_char_t) '\n') : 0), \
emitter->column = 0, \
emitter->line ++, \
1))
/*
* Copy a character from a string into buffer.
*/
#define WRITE(emitter,string) \
(FLUSH(emitter) \
&& (COPY(emitter->buffer,string), \
emitter->column ++, \
1))
/*
* Copy a line break character from a string into buffer.
*/
#define WRITE_BREAK(emitter,string) \
(FLUSH(emitter) \
&& (CHECK(string,'\n') ? \
(PUT_BREAK(emitter), \
string.pointer ++, \
1) : \
(COPY(emitter->buffer,string), \
emitter->column = 0, \
emitter->line ++, \
1)))
/*
* API functions.
*/
YAML_DECLARE(int)
yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event);
/*
* Utility functions.
*/
static int
yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem);
static int
yaml_emitter_need_more_events(yaml_emitter_t *emitter);
static int
yaml_emitter_append_tag_directive(yaml_emitter_t *emitter,
yaml_tag_directive_t value, int allow_duplicates);
static int
yaml_emitter_increase_indent(yaml_emitter_t *emitter,
int flow, int indentless);
/*
* State functions.
*/
static int
yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event);
static int
yaml_emitter_emit_stream_start(yaml_emitter_t *emitter,
yaml_event_t *event);
static int
yaml_emitter_emit_document_start(yaml_emitter_t *emitter,
yaml_event_t *event, int first);
static int
yaml_emitter_emit_document_content(yaml_emitter_t *emitter,
yaml_event_t *event);
static int
yaml_emitter_emit_document_end(yaml_emitter_t *emitter,
yaml_event_t *event);
static int
yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter,
yaml_event_t *event, int first);
static int
yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter,
yaml_event_t *event, int first);
static int
yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter,
yaml_event_t *event, int simple);
static int
yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter,
yaml_event_t *event, int first);
static int
yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter,
yaml_event_t *event, int first);
static int
yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter,
yaml_event_t *event, int simple);
static int
yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event,
int root, int sequence, int mapping, int simple_key);
static int
yaml_emitter_emit_alias(yaml_emitter_t *emitter, yaml_event_t *event);
static int
yaml_emitter_emit_scalar(yaml_emitter_t *emitter, yaml_event_t *event);
static int
yaml_emitter_emit_sequence_start(yaml_emitter_t *emitter, yaml_event_t *event);
static int
yaml_emitter_emit_mapping_start(yaml_emitter_t *emitter, yaml_event_t *event);
/*
* Checkers.
*/
static int
yaml_emitter_check_empty_document(yaml_emitter_t *emitter);
static int
yaml_emitter_check_empty_sequence(yaml_emitter_t *emitter);
static int
yaml_emitter_check_empty_mapping(yaml_emitter_t *emitter);
static int
yaml_emitter_check_simple_key(yaml_emitter_t *emitter);
static int
yaml_emitter_select_scalar_style(yaml_emitter_t *emitter, yaml_event_t *event);
/*
* Processors.
*/
static int
yaml_emitter_process_anchor(yaml_emitter_t *emitter);
static int
yaml_emitter_process_tag(yaml_emitter_t *emitter);
static int
yaml_emitter_process_scalar(yaml_emitter_t *emitter);
/*
* Analyzers.
*/
static int
yaml_emitter_analyze_version_directive(yaml_emitter_t *emitter,
yaml_version_directive_t version_directive);
static int
yaml_emitter_analyze_tag_directive(yaml_emitter_t *emitter,
yaml_tag_directive_t tag_directive);
static int
yaml_emitter_analyze_anchor(yaml_emitter_t *emitter,
yaml_char_t *anchor, int alias);
static int
yaml_emitter_analyze_tag(yaml_emitter_t *emitter,
yaml_char_t *tag);
static int
yaml_emitter_analyze_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length);
static int
yaml_emitter_analyze_event(yaml_emitter_t *emitter,
yaml_event_t *event);
/*
* Writers.
*/
static int
yaml_emitter_write_bom(yaml_emitter_t *emitter);
static int
yaml_emitter_write_indent(yaml_emitter_t *emitter);
static int
yaml_emitter_write_indicator(yaml_emitter_t *emitter,
char *indicator, int need_whitespace,
int is_whitespace, int is_indention);
static int
yaml_emitter_write_anchor(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length);
static int
yaml_emitter_write_tag_handle(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length);
static int
yaml_emitter_write_tag_content(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length, int need_whitespace);
static int
yaml_emitter_write_plain_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length, int allow_breaks);
static int
yaml_emitter_write_single_quoted_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length, int allow_breaks);
static int
yaml_emitter_write_double_quoted_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length, int allow_breaks);
static int
yaml_emitter_write_block_scalar_hints(yaml_emitter_t *emitter,
yaml_string_t string);
static int
yaml_emitter_write_literal_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length);
static int
yaml_emitter_write_folded_scalar(yaml_emitter_t *emitter,
yaml_char_t *value, size_t length);
/*
* Set an emitter error and return 0.
*/
static int
yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem)
{
emitter->error = YAML_EMITTER_ERROR;
emitter->problem = problem;
return 0;
}
/*
* Emit an event.
*/
YAML_DECLARE(int)
yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event)
{
if (!ENQUEUE(emitter, emitter->events, *event)) {
yaml_event_delete(event);
return 0;
}
while (!yaml_emitter_need_more_events(emitter)) {
if (!yaml_emitter_analyze_event(emitter, emitter->events.head))
return 0;
if (!yaml_emitter_state_machine(emitter, emitter->events.head))
return 0;
yaml_event_delete(&DEQUEUE(emitter, emitter->events));
}
return 1;
}
/*
* Check if we need to accumulate more events before emitting.
*
* We accumulate extra
* - 1 event for DOCUMENT-START
* - 2 events for SEQUENCE-START
* - 3 events for MAPPING-START
*/
static int
yaml_emitter_need_more_events(yaml_emitter_t *emitter)
{
int level = 0;
int accumulate = 0;
yaml_event_t *event;
if (QUEUE_EMPTY(emitter, emitter->events))
return 1;
switch (emitter->events.head->type) {
case YAML_DOCUMENT_START_EVENT:
accumulate = 1;
break;
case YAML_SEQUENCE_START_EVENT:
accumulate = 2;
break;
case YAML_MAPPING_START_EVENT:
accumulate = 3;
break;
default:
return 0;
}
if (emitter->events.tail - emitter->events.head > accumulate)
return 0;
for (event = emitter->events.head; event != emitter->events.tail; event ++) {
switch (event->type) {
case YAML_STREAM_START_EVENT:
case YAML_DOCUMENT_START_EVENT:
case YAML_SEQUENCE_START_EVENT:
case YAML_MAPPING_START_EVENT:
level += 1;
break;
case YAML_STREAM_END_EVENT:
case YAML_DOCUMENT_END_EVENT:
case YAML_SEQUENCE_END_EVENT:
case YAML_MAPPING_END_EVENT:
level -= 1;
break;
default:
break;
}
if (!level)
return 0;
}
return 1;
}
/*
* Append a directive to the directives stack.
*/
static int
yaml_emitter_append_tag_directive(yaml_emitter_t *emitter,
yaml_tag_directive_t value, int allow_duplicates)
{
yaml_tag_directive_t *tag_directive;
yaml_tag_directive_t copy = { NULL, NULL };
for (tag_directive = emitter->tag_directives.start;
tag_directive != emitter->tag_directives.top; tag_directive ++) {
if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) {
if (allow_duplicates)
return 1;
return yaml_emitter_set_emitter_error(emitter,
"duplicate %TAG directive");
}
}
copy.handle = yaml_strdup(value.handle);
copy.prefix = yaml_strdup(value.prefix);
if (!copy.handle || !copy.prefix) {
emitter->error = YAML_MEMORY_ERROR;
goto error;
}
if (!PUSH(emitter, emitter->tag_directives, copy))
goto error;
return 1;
error:
yaml_free(copy.handle);
yaml_free(copy.prefix);
return 0;
}
/*
* Increase the indentation level.
*/
static int
yaml_emitter_increase_indent(yaml_emitter_t *emitter,
int flow, int indentless)
{
if (!PUSH(emitter, emitter->indents, emitter->indent))
return 0;
if (emitter->indent < 0) {
emitter->indent = flow ? emitter->best_indent : 0;
}
else if (!indentless) {
emitter->indent += emitter->best_indent;
}
return 1;
}
/*
* State dispatcher.
*/
static int
yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event)
{
switch (emitter->state)
{
case YAML_EMIT_STREAM_START_STATE:
return yaml_emitter_emit_stream_start(emitter, event);
case YAML_EMIT_FIRST_DOCUMENT_START_STATE:
return yaml_emitter_emit_document_start(emitter, event, 1);
case YAML_EMIT_DOCUMENT_START_STATE:
return yaml_emitter_emit_document_start(emitter, event, 0);
case YAML_EMIT_DOCUMENT_CONTENT_STATE:
return yaml_emitter_emit_document_content(emitter, event);
case YAML_EMIT_DOCUMENT_END_STATE:
return yaml_emitter_emit_document_end(emitter, event);
case YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE:
return yaml_emitter_emit_flow_sequence_item(emitter, event, 1);
case YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE:
return yaml_emitter_emit_flow_sequence_item(emitter, event, 0);
case YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE:
return yaml_emitter_emit_flow_mapping_key(emitter, event, 1);
case YAML_EMIT_FLOW_MAPPING_KEY_STATE:
return yaml_emitter_emit_flow_mapping_key(emitter, event, 0);
case YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE:
return yaml_emitter_emit_flow_mapping_value(emitter, event, 1);
case YAML_EMIT_FLOW_MAPPING_VALUE_STATE:
return yaml_emitter_emit_flow_mapping_value(emitter, event, 0);
case YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE:
return yaml_emitter_emit_block_sequence_item(emitter, event, 1);
case YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE:
return yaml_emitter_emit_block_sequence_item(emitter, event, 0);
case YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE:
return yaml_emitter_emit_block_mapping_key(emitter, event, 1);
case YAML_EMIT_BLOCK_MAPPING_KEY_STATE:
return yaml_emitter_emit_block_mapping_key(emitter, event, 0);
case YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE:
return yaml_emitter_emit_block_mapping_value(emitter, event, 1);
case YAML_EMIT_BLOCK_MAPPING_VALUE_STATE:
return yaml_emitter_emit_block_mapping_value(emitter, event, 0);
case YAML_EMIT_END_STATE:
return yaml_emitter_set_emitter_error(emitter,
"expected nothing after STREAM-END");
default:
assert(1); /* Invalid state. */
}
return 0;
}
/*
* Expect STREAM-START.
*/
static int
yaml_emitter_emit_stream_start(yaml_emitter_t *emitter,
yaml_event_t *event)
{
if (event->type == YAML_STREAM_START_EVENT)
{
if (!emitter->encoding) {
emitter->encoding = event->data.stream_start.encoding;
}
if (!emitter->encoding) {
emitter->encoding = YAML_UTF8_ENCODING;
}
if (emitter->best_indent < 2 || emitter->best_indent > 9) {
emitter->best_indent = 2;
}
if (emitter->best_width >= 0
&& emitter->best_width <= emitter->best_indent*2) {
emitter->best_width = 80;
}
if (emitter->best_width < 0) {
emitter->best_width = INT_MAX;
}
if (!emitter->line_break) {
emitter->line_break = YAML_LN_BREAK;
}
emitter->indent = -1;
emitter->line = 0;
emitter->column = 0;
emitter->whitespace = 1;
emitter->indention = 1;
if (emitter->encoding != YAML_UTF8_ENCODING) {
if (!yaml_emitter_write_bom(emitter))
return 0;
}
emitter->state = YAML_EMIT_FIRST_DOCUMENT_START_STATE;
return 1;
}
return yaml_emitter_set_emitter_error(emitter,
"expected STREAM-START");
}
/*
* Expect DOCUMENT-START or STREAM-END.
*/
static int
yaml_emitter_emit_document_start(yaml_emitter_t *emitter,
yaml_event_t *event, int first)
{
if (event->type == YAML_DOCUMENT_START_EVENT)
{
yaml_tag_directive_t default_tag_directives[] = {
{(yaml_char_t *)"!", (yaml_char_t *)"!"},
{(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"},
{NULL, NULL}
};
yaml_tag_directive_t *tag_directive;
int implicit;
if (event->data.document_start.version_directive) {
if (!yaml_emitter_analyze_version_directive(emitter,
*event->data.document_start.version_directive))
return 0;
}
for (tag_directive = event->data.document_start.tag_directives.start;
tag_directive != event->data.document_start.tag_directives.end;
tag_directive ++) {
if (!yaml_emitter_analyze_tag_directive(emitter, *tag_directive))
return 0;
if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 0))
return 0;
}
for (tag_directive = default_tag_directives;
tag_directive->handle; tag_directive ++) {
if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 1))
return 0;
}
implicit = event->data.document_start.implicit;
if (!first || emitter->canonical) {
implicit = 0;
}
if ((event->data.document_start.version_directive ||
(event->data.document_start.tag_directives.start
!= event->data.document_start.tag_directives.end)) &&
emitter->open_ended)
{
if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (event->data.document_start.version_directive) {
implicit = 0;
if (!yaml_emitter_write_indicator(emitter, "%YAML", 1, 0, 0))
return 0;
if (!yaml_emitter_write_indicator(emitter, "1.1", 1, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (event->data.document_start.tag_directives.start
!= event->data.document_start.tag_directives.end) {
implicit = 0;
for (tag_directive = event->data.document_start.tag_directives.start;
tag_directive != event->data.document_start.tag_directives.end;
tag_directive ++) {
if (!yaml_emitter_write_indicator(emitter, "%TAG", 1, 0, 0))
return 0;
if (!yaml_emitter_write_tag_handle(emitter, tag_directive->handle,
strlen((char *)tag_directive->handle)))
return 0;
if (!yaml_emitter_write_tag_content(emitter, tag_directive->prefix,
strlen((char *)tag_directive->prefix), 1))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
}
if (yaml_emitter_check_empty_document(emitter)) {
implicit = 0;
}
if (!implicit) {
if (!yaml_emitter_write_indent(emitter))
return 0;
if (!yaml_emitter_write_indicator(emitter, "---", 1, 0, 0))
return 0;
if (emitter->canonical) {
if (!yaml_emitter_write_indent(emitter))
return 0;
}
}
emitter->state = YAML_EMIT_DOCUMENT_CONTENT_STATE;
return 1;
}
else if (event->type == YAML_STREAM_END_EVENT)
{
if (emitter->open_ended)
{
if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!yaml_emitter_flush(emitter))
return 0;
emitter->state = YAML_EMIT_END_STATE;
return 1;
}
return yaml_emitter_set_emitter_error(emitter,
"expected DOCUMENT-START or STREAM-END");
}
/*
* Expect the root node.
*/
static int
yaml_emitter_emit_document_content(yaml_emitter_t *emitter,
yaml_event_t *event)
{
if (!PUSH(emitter, emitter->states, YAML_EMIT_DOCUMENT_END_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 1, 0, 0, 0);
}
/*
* Expect DOCUMENT-END.
*/
static int
yaml_emitter_emit_document_end(yaml_emitter_t *emitter,
yaml_event_t *event)
{
if (event->type == YAML_DOCUMENT_END_EVENT)
{
if (!yaml_emitter_write_indent(emitter))
return 0;
if (!event->data.document_end.implicit) {
if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!yaml_emitter_flush(emitter))
return 0;
emitter->state = YAML_EMIT_DOCUMENT_START_STATE;
while (!STACK_EMPTY(emitter, emitter->tag_directives)) {
yaml_tag_directive_t tag_directive = POP(emitter,
emitter->tag_directives);
yaml_free(tag_directive.handle);
yaml_free(tag_directive.prefix);
}
return 1;
}
return yaml_emitter_set_emitter_error(emitter,
"expected DOCUMENT-END");
}
/*
*
* Expect a flow item node.
*/
static int
yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter,
yaml_event_t *event, int first)
{
if (first)
{
if (!yaml_emitter_write_indicator(emitter, "[", 1, 1, 0))
return 0;
if (!yaml_emitter_increase_indent(emitter, 1, 0))
return 0;
emitter->flow_level ++;
}
if (event->type == YAML_SEQUENCE_END_EVENT)
{
emitter->flow_level --;
emitter->indent = POP(emitter, emitter->indents);
if (emitter->canonical && !first) {
if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!yaml_emitter_write_indicator(emitter, "]", 0, 0, 0))
return 0;
emitter->state = POP(emitter, emitter->states);
return 1;
}
if (!first) {
if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))
return 0;
}
if (emitter->canonical || emitter->column > emitter->best_width) {
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0);
}
/*
* Expect a flow key node.
*/
static int
yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter,
yaml_event_t *event, int first)
{
if (first)
{
if (!yaml_emitter_write_indicator(emitter, "{", 1, 1, 0))
return 0;
if (!yaml_emitter_increase_indent(emitter, 1, 0))
return 0;
emitter->flow_level ++;
}
if (event->type == YAML_MAPPING_END_EVENT)
{
emitter->flow_level --;
emitter->indent = POP(emitter, emitter->indents);
if (emitter->canonical && !first) {
if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))
return 0;
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!yaml_emitter_write_indicator(emitter, "}", 0, 0, 0))
return 0;
emitter->state = POP(emitter, emitter->states);
return 1;
}
if (!first) {
if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))
return 0;
}
if (emitter->canonical || emitter->column > emitter->best_width) {
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!emitter->canonical && yaml_emitter_check_simple_key(emitter))
{
if (!PUSH(emitter, emitter->states,
YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1);
}
else
{
if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 0))
return 0;
if (!PUSH(emitter, emitter->states,
YAML_EMIT_FLOW_MAPPING_VALUE_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);
}
}
/*
* Expect a flow value node.
*/
static int
yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter,
yaml_event_t *event, int simple)
{
if (simple) {
if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0))
return 0;
}
else {
if (emitter->canonical || emitter->column > emitter->best_width) {
if (!yaml_emitter_write_indent(emitter))
return 0;
}
if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 0))
return 0;
}
if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_MAPPING_KEY_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);
}
/*
* Expect a block item node.
*/
static int
yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter,
yaml_event_t *event, int first)
{
if (first)
{
if (!yaml_emitter_increase_indent(emitter, 0,
(emitter->mapping_context && !emitter->indention)))
return 0;
}
if (event->type == YAML_SEQUENCE_END_EVENT)
{
emitter->indent = POP(emitter, emitter->indents);
emitter->state = POP(emitter, emitter->states);
return 1;
}
if (!yaml_emitter_write_indent(emitter))
return 0;
if (!yaml_emitter_write_indicator(emitter, "-", 1, 0, 1))
return 0;
if (!PUSH(emitter, emitter->states,
YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0);
}
/*
* Expect a block key node.
*/
static int
yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter,
yaml_event_t *event, int first)
{
if (first)
{
if (!yaml_emitter_increase_indent(emitter, 0, 0))
return 0;
}
if (event->type == YAML_MAPPING_END_EVENT)
{
emitter->indent = POP(emitter, emitter->indents);
emitter->state = POP(emitter, emitter->states);
return 1;
}
if (!yaml_emitter_write_indent(emitter))
return 0;
if (yaml_emitter_check_simple_key(emitter))
{
if (!PUSH(emitter, emitter->states,
YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1);
}
else
{
if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 1))
return 0;
if (!PUSH(emitter, emitter->states,
YAML_EMIT_BLOCK_MAPPING_VALUE_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);
}
}
/*
* Expect a block value node.
*/
static int
yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter,
yaml_event_t *event, int simple)
{
if (simple) {
if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0))
return 0;
}
else {
if (!yaml_emitter_write_indent(emitter))
return 0;
if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 1))
return 0;
}
if (!PUSH(emitter, emitter->states,
YAML_EMIT_BLOCK_MAPPING_KEY_STATE))
return 0;
return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);
}
/*
* Expect a node.
*/
static int
yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event,
int root, int sequence, int mapping, int simple_key)
{
emitter->root_context = root;
emitter->sequence_context = sequence;
emitter->mapping_context = mapping;
emitter->simple_key_context = simple_key;
switch (event->type)
{
case YAML_ALIAS_EVENT:
return yaml_emitter_emit_alias(emitter, event);
case YAML_SCALAR_EVENT:
return yaml_emitter_emit_scalar(emitter, event);
case YAML_SEQUENCE_START_EVENT:
return yaml_emitter_emit_sequence_start(emitter, event);
case YAML_MAPPING_START_EVENT:
return yaml_emitter_emit_mapping_start(emitter, event);
default:
return yaml_emitter_set_emitter_error(emitter,
"expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS");
}
return 0;
}
/*