use crate::api::{yaml_free, yaml_queue_extend, yaml_stack_extend, yaml_strdup};
use crate::externs::{strcmp, strlen, strncmp};
use crate::success::{Success, FAIL, OK};
use crate::yaml::{size_t, yaml_char_t, yaml_string_t};
use crate::{
    libc, yaml_emitter_flush, yaml_emitter_t, yaml_event_delete, yaml_event_t, yaml_scalar_style_t,
    yaml_tag_directive_t, yaml_version_directive_t, PointerExt, YAML_ALIAS_EVENT, YAML_ANY_BREAK,
    YAML_ANY_ENCODING, YAML_ANY_SCALAR_STYLE, YAML_CRLN_BREAK, YAML_CR_BREAK,
    YAML_DOCUMENT_END_EVENT, YAML_DOCUMENT_START_EVENT, YAML_DOUBLE_QUOTED_SCALAR_STYLE,
    YAML_EMITTER_ERROR, YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE, YAML_EMIT_BLOCK_MAPPING_KEY_STATE,
    YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE, YAML_EMIT_BLOCK_MAPPING_VALUE_STATE,
    YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE, YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE,
    YAML_EMIT_DOCUMENT_CONTENT_STATE, YAML_EMIT_DOCUMENT_END_STATE, YAML_EMIT_DOCUMENT_START_STATE,
    YAML_EMIT_END_STATE, YAML_EMIT_FIRST_DOCUMENT_START_STATE,
    YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE, YAML_EMIT_FLOW_MAPPING_KEY_STATE,
    YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE, YAML_EMIT_FLOW_MAPPING_VALUE_STATE,
    YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE, YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE,
    YAML_EMIT_STREAM_START_STATE, YAML_FLOW_MAPPING_STYLE, YAML_FLOW_SEQUENCE_STYLE,
    YAML_FOLDED_SCALAR_STYLE, YAML_LITERAL_SCALAR_STYLE, YAML_LN_BREAK, YAML_MAPPING_END_EVENT,
    YAML_MAPPING_START_EVENT, YAML_PLAIN_SCALAR_STYLE, YAML_SCALAR_EVENT, YAML_SEQUENCE_END_EVENT,
    YAML_SEQUENCE_START_EVENT, YAML_SINGLE_QUOTED_SCALAR_STYLE, YAML_STREAM_END_EVENT,
    YAML_STREAM_START_EVENT, YAML_UTF8_ENCODING,
};
use core::ptr::{self, addr_of_mut};

unsafe fn FLUSH(emitter: *mut yaml_emitter_t) -> Success {
    if (*emitter).buffer.pointer.wrapping_offset(5_isize) < (*emitter).buffer.end {
        OK
    } else {
        yaml_emitter_flush(emitter)
    }
}

unsafe fn PUT(emitter: *mut yaml_emitter_t, value: u8) -> Success {
    if FLUSH(emitter).fail {
        return FAIL;
    }
    let fresh40 = addr_of_mut!((*emitter).buffer.pointer);
    let fresh41 = *fresh40;
    *fresh40 = (*fresh40).wrapping_offset(1);
    *fresh41 = value;
    let fresh42 = addr_of_mut!((*emitter).column);
    *fresh42 += 1;
    OK
}

unsafe fn PUT_BREAK(emitter: *mut yaml_emitter_t) -> Success {
    if FLUSH(emitter).fail {
        return FAIL;
    }
    if (*emitter).line_break == YAML_CR_BREAK {
        let fresh62 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh63 = *fresh62;
        *fresh62 = (*fresh62).wrapping_offset(1);
        *fresh63 = b'\r';
    } else if (*emitter).line_break == YAML_LN_BREAK {
        let fresh64 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh65 = *fresh64;
        *fresh64 = (*fresh64).wrapping_offset(1);
        *fresh65 = b'\n';
    } else if (*emitter).line_break == YAML_CRLN_BREAK {
        let fresh66 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh67 = *fresh66;
        *fresh66 = (*fresh66).wrapping_offset(1);
        *fresh67 = b'\r';
        let fresh68 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh69 = *fresh68;
        *fresh68 = (*fresh68).wrapping_offset(1);
        *fresh69 = b'\n';
    };
    (*emitter).column = 0;
    let fresh70 = addr_of_mut!((*emitter).line);
    *fresh70 += 1;
    OK
}

unsafe fn WRITE(emitter: *mut yaml_emitter_t, string: *mut yaml_string_t) -> Success {
    if FLUSH(emitter).fail {
        return FAIL;
    }
    COPY!((*emitter).buffer, *string);
    let fresh107 = addr_of_mut!((*emitter).column);
    *fresh107 += 1;
    OK
}

unsafe fn WRITE_BREAK(emitter: *mut yaml_emitter_t, string: *mut yaml_string_t) -> Success {
    if FLUSH(emitter).fail {
        return FAIL;
    }
    if CHECK!(*string, b'\n') {
        let _ = PUT_BREAK(emitter);
        (*string).pointer = (*string).pointer.wrapping_offset(1);
    } else {
        COPY!((*emitter).buffer, *string);
        (*emitter).column = 0;
        let fresh300 = addr_of_mut!((*emitter).line);
        *fresh300 += 1;
    }
    OK
}

macro_rules! WRITE {
    ($emitter:expr, $string:expr) => {
        WRITE($emitter, addr_of_mut!($string))
    };
}

macro_rules! WRITE_BREAK {
    ($emitter:expr, $string:expr) => {
        WRITE_BREAK($emitter, addr_of_mut!($string))
    };
}

unsafe fn yaml_emitter_set_emitter_error(
    emitter: *mut yaml_emitter_t,
    problem: *const libc::c_char,
) -> Success {
    (*emitter).error = YAML_EMITTER_ERROR;
    let fresh0 = addr_of_mut!((*emitter).problem);
    *fresh0 = problem;
    FAIL
}

/// Emit an event.
///
/// The event object may be generated using the yaml_parser_parse() function.
/// The emitter takes the responsibility for the event object and destroys its
/// content after it is emitted. The event object is destroyed even if the
/// function fails.
pub unsafe fn yaml_emitter_emit(emitter: *mut yaml_emitter_t, event: *mut yaml_event_t) -> Success {
    ENQUEUE!((*emitter).events, *event);
    while yaml_emitter_need_more_events(emitter).fail {
        if yaml_emitter_analyze_event(emitter, (*emitter).events.head).fail {
            return FAIL;
        }
        if yaml_emitter_state_machine(emitter, (*emitter).events.head).fail {
            return FAIL;
        }
        yaml_event_delete(addr_of_mut!(DEQUEUE!((*emitter).events)));
    }
    OK
}

unsafe fn yaml_emitter_need_more_events(emitter: *mut yaml_emitter_t) -> Success {
    let mut level: libc::c_int = 0;
    let mut event: *mut yaml_event_t;
    if QUEUE_EMPTY!((*emitter).events) {
        return OK;
    }
    let accumulate = match (*(*emitter).events.head).type_ {
        YAML_DOCUMENT_START_EVENT => 1,
        YAML_SEQUENCE_START_EVENT => 2,
        YAML_MAPPING_START_EVENT => 3,
        _ => return FAIL,
    };
    if (*emitter).events.tail.c_offset_from((*emitter).events.head) as libc::c_long
        > accumulate as libc::c_long
    {
        return FAIL;
    }
    event = (*emitter).events.head;
    while event != (*emitter).events.tail {
        match (*event).type_ {
            YAML_STREAM_START_EVENT
            | YAML_DOCUMENT_START_EVENT
            | YAML_SEQUENCE_START_EVENT
            | YAML_MAPPING_START_EVENT => {
                level += 1;
            }
            YAML_STREAM_END_EVENT
            | YAML_DOCUMENT_END_EVENT
            | YAML_SEQUENCE_END_EVENT
            | YAML_MAPPING_END_EVENT => {
                level -= 1;
            }
            _ => {}
        }
        if level == 0 {
            return FAIL;
        }
        event = event.wrapping_offset(1);
    }
    OK
}

unsafe fn yaml_emitter_append_tag_directive(
    emitter: *mut yaml_emitter_t,
    value: yaml_tag_directive_t,
    allow_duplicates: bool,
) -> Success {
    let mut tag_directive: *mut yaml_tag_directive_t;
    let mut copy = yaml_tag_directive_t {
        handle: ptr::null_mut::<yaml_char_t>(),
        prefix: ptr::null_mut::<yaml_char_t>(),
    };
    tag_directive = (*emitter).tag_directives.start;
    while tag_directive != (*emitter).tag_directives.top {
        if strcmp(
            value.handle as *mut libc::c_char,
            (*tag_directive).handle as *mut libc::c_char,
        ) == 0
        {
            if allow_duplicates {
                return OK;
            }
            return yaml_emitter_set_emitter_error(
                emitter,
                b"duplicate %TAG directive\0" as *const u8 as *const libc::c_char,
            );
        }
        tag_directive = tag_directive.wrapping_offset(1);
    }
    copy.handle = yaml_strdup(value.handle);
    copy.prefix = yaml_strdup(value.prefix);
    PUSH!((*emitter).tag_directives, copy);
    OK
}

unsafe fn yaml_emitter_increase_indent(emitter: *mut yaml_emitter_t, flow: bool, indentless: bool) {
    PUSH!((*emitter).indents, (*emitter).indent);
    if (*emitter).indent < 0 {
        (*emitter).indent = if flow { (*emitter).best_indent } else { 0 };
    } else if !indentless {
        (*emitter).indent += (*emitter).best_indent;
    }
}

unsafe fn yaml_emitter_state_machine(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    match (*emitter).state {
        YAML_EMIT_STREAM_START_STATE => yaml_emitter_emit_stream_start(emitter, event),
        YAML_EMIT_FIRST_DOCUMENT_START_STATE => {
            yaml_emitter_emit_document_start(emitter, event, true)
        }
        YAML_EMIT_DOCUMENT_START_STATE => yaml_emitter_emit_document_start(emitter, event, false),
        YAML_EMIT_DOCUMENT_CONTENT_STATE => yaml_emitter_emit_document_content(emitter, event),
        YAML_EMIT_DOCUMENT_END_STATE => yaml_emitter_emit_document_end(emitter, event),
        YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE => {
            yaml_emitter_emit_flow_sequence_item(emitter, event, true)
        }
        YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE => {
            yaml_emitter_emit_flow_sequence_item(emitter, event, false)
        }
        YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE => {
            yaml_emitter_emit_flow_mapping_key(emitter, event, true)
        }
        YAML_EMIT_FLOW_MAPPING_KEY_STATE => {
            yaml_emitter_emit_flow_mapping_key(emitter, event, false)
        }
        YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE => {
            yaml_emitter_emit_flow_mapping_value(emitter, event, true)
        }
        YAML_EMIT_FLOW_MAPPING_VALUE_STATE => {
            yaml_emitter_emit_flow_mapping_value(emitter, event, false)
        }
        YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE => {
            yaml_emitter_emit_block_sequence_item(emitter, event, true)
        }
        YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE => {
            yaml_emitter_emit_block_sequence_item(emitter, event, false)
        }
        YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE => {
            yaml_emitter_emit_block_mapping_key(emitter, event, true)
        }
        YAML_EMIT_BLOCK_MAPPING_KEY_STATE => {
            yaml_emitter_emit_block_mapping_key(emitter, event, false)
        }
        YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE => {
            yaml_emitter_emit_block_mapping_value(emitter, event, true)
        }
        YAML_EMIT_BLOCK_MAPPING_VALUE_STATE => {
            yaml_emitter_emit_block_mapping_value(emitter, event, false)
        }
        YAML_EMIT_END_STATE => yaml_emitter_set_emitter_error(
            emitter,
            b"expected nothing after STREAM-END\0" as *const u8 as *const libc::c_char,
        ),
    }
}

unsafe fn yaml_emitter_emit_stream_start(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    (*emitter).open_ended = 0;
    if (*event).type_ == YAML_STREAM_START_EVENT {
        if (*emitter).encoding == YAML_ANY_ENCODING {
            (*emitter).encoding = (*event).data.stream_start.encoding;
        }
        if (*emitter).encoding == YAML_ANY_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 = libc::c_int::MAX;
        }
        if (*emitter).line_break == YAML_ANY_BREAK {
            (*emitter).line_break = YAML_LN_BREAK;
        }
        (*emitter).indent = -1;
        (*emitter).line = 0;
        (*emitter).column = 0;
        (*emitter).whitespace = true;
        (*emitter).indention = true;
        if (*emitter).encoding != YAML_UTF8_ENCODING {
            if yaml_emitter_write_bom(emitter).fail {
                return FAIL;
            }
        }
        (*emitter).state = YAML_EMIT_FIRST_DOCUMENT_START_STATE;
        return OK;
    }
    yaml_emitter_set_emitter_error(
        emitter,
        b"expected STREAM-START\0" as *const u8 as *const libc::c_char,
    )
}

unsafe fn yaml_emitter_emit_document_start(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    first: bool,
) -> Success {
    if (*event).type_ == YAML_DOCUMENT_START_EVENT {
        let mut default_tag_directives: [yaml_tag_directive_t; 3] = [
            yaml_tag_directive_t {
                handle: b"!\0" as *const u8 as *const libc::c_char as *mut yaml_char_t,
                prefix: b"!\0" as *const u8 as *const libc::c_char as *mut yaml_char_t,
            },
            yaml_tag_directive_t {
                handle: b"!!\0" as *const u8 as *const libc::c_char as *mut yaml_char_t,
                prefix: b"tag:yaml.org,2002:\0" as *const u8 as *const libc::c_char
                    as *mut yaml_char_t,
            },
            yaml_tag_directive_t {
                handle: ptr::null_mut::<yaml_char_t>(),
                prefix: ptr::null_mut::<yaml_char_t>(),
            },
        ];
        let mut tag_directive: *mut yaml_tag_directive_t;
        let mut implicit;
        if !(*event).data.document_start.version_directive.is_null() {
            if yaml_emitter_analyze_version_directive(
                emitter,
                *(*event).data.document_start.version_directive,
            )
            .fail
            {
                return FAIL;
            }
        }
        tag_directive = (*event).data.document_start.tag_directives.start;
        while tag_directive != (*event).data.document_start.tag_directives.end {
            if yaml_emitter_analyze_tag_directive(emitter, *tag_directive).fail {
                return FAIL;
            }
            if yaml_emitter_append_tag_directive(emitter, *tag_directive, false).fail {
                return FAIL;
            }
            tag_directive = tag_directive.wrapping_offset(1);
        }
        tag_directive = default_tag_directives.as_mut_ptr();
        while !(*tag_directive).handle.is_null() {
            if yaml_emitter_append_tag_directive(emitter, *tag_directive, true).fail {
                return FAIL;
            }
            tag_directive = tag_directive.wrapping_offset(1);
        }
        implicit = (*event).data.document_start.implicit;
        if !first || (*emitter).canonical {
            implicit = false;
        }
        if (!(*event).data.document_start.version_directive.is_null()
            || (*event).data.document_start.tag_directives.start
                != (*event).data.document_start.tag_directives.end)
            && (*emitter).open_ended != 0
        {
            if yaml_emitter_write_indicator(
                emitter,
                b"...\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        (*emitter).open_ended = 0;
        if !(*event).data.document_start.version_directive.is_null() {
            implicit = false;
            if yaml_emitter_write_indicator(
                emitter,
                b"%YAML\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if (*(*event).data.document_start.version_directive).minor == 1 {
                if yaml_emitter_write_indicator(
                    emitter,
                    b"1.1\0" as *const u8 as *const libc::c_char,
                    true,
                    false,
                    false,
                )
                .fail
                {
                    return FAIL;
                }
            } else if yaml_emitter_write_indicator(
                emitter,
                b"1.2\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        if (*event).data.document_start.tag_directives.start
            != (*event).data.document_start.tag_directives.end
        {
            implicit = false;
            tag_directive = (*event).data.document_start.tag_directives.start;
            while tag_directive != (*event).data.document_start.tag_directives.end {
                if yaml_emitter_write_indicator(
                    emitter,
                    b"%TAG\0" as *const u8 as *const libc::c_char,
                    true,
                    false,
                    false,
                )
                .fail
                {
                    return FAIL;
                }
                if yaml_emitter_write_tag_handle(
                    emitter,
                    (*tag_directive).handle,
                    strlen((*tag_directive).handle as *mut libc::c_char),
                )
                .fail
                {
                    return FAIL;
                }
                if yaml_emitter_write_tag_content(
                    emitter,
                    (*tag_directive).prefix,
                    strlen((*tag_directive).prefix as *mut libc::c_char),
                    true,
                )
                .fail
                {
                    return FAIL;
                }
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                tag_directive = tag_directive.wrapping_offset(1);
            }
        }
        if yaml_emitter_check_empty_document(emitter) {
            implicit = false;
        }
        if !implicit {
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
            if yaml_emitter_write_indicator(
                emitter,
                b"---\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if (*emitter).canonical {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
            }
        }
        (*emitter).state = YAML_EMIT_DOCUMENT_CONTENT_STATE;
        (*emitter).open_ended = 0;
        return OK;
    } else if (*event).type_ == YAML_STREAM_END_EVENT {
        if (*emitter).open_ended == 2 {
            if yaml_emitter_write_indicator(
                emitter,
                b"...\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            (*emitter).open_ended = 0;
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        if yaml_emitter_flush(emitter).fail {
            return FAIL;
        }
        (*emitter).state = YAML_EMIT_END_STATE;
        return OK;
    }
    yaml_emitter_set_emitter_error(
        emitter,
        b"expected DOCUMENT-START or STREAM-END\0" as *const u8 as *const libc::c_char,
    )
}

unsafe fn yaml_emitter_emit_document_content(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    PUSH!((*emitter).states, YAML_EMIT_DOCUMENT_END_STATE);
    yaml_emitter_emit_node(emitter, event, true, false, false, false)
}

unsafe fn yaml_emitter_emit_document_end(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    if (*event).type_ == YAML_DOCUMENT_END_EVENT {
        if yaml_emitter_write_indent(emitter).fail {
            return FAIL;
        }
        if !(*event).data.document_end.implicit {
            if yaml_emitter_write_indicator(
                emitter,
                b"...\0" as *const u8 as *const libc::c_char,
                true,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            (*emitter).open_ended = 0;
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        } else if (*emitter).open_ended == 0 {
            (*emitter).open_ended = 1;
        }
        if yaml_emitter_flush(emitter).fail {
            return FAIL;
        }
        (*emitter).state = YAML_EMIT_DOCUMENT_START_STATE;
        while !STACK_EMPTY!((*emitter).tag_directives) {
            let tag_directive = POP!((*emitter).tag_directives);
            yaml_free(tag_directive.handle as *mut libc::c_void);
            yaml_free(tag_directive.prefix as *mut libc::c_void);
        }
        return OK;
    }
    yaml_emitter_set_emitter_error(
        emitter,
        b"expected DOCUMENT-END\0" as *const u8 as *const libc::c_char,
    )
}

unsafe fn yaml_emitter_emit_flow_sequence_item(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    first: bool,
) -> Success {
    if first {
        if yaml_emitter_write_indicator(
            emitter,
            b"[\0" as *const u8 as *const libc::c_char,
            true,
            true,
            false,
        )
        .fail
        {
            return FAIL;
        }
        yaml_emitter_increase_indent(emitter, true, false);
        let fresh12 = addr_of_mut!((*emitter).flow_level);
        *fresh12 += 1;
    }
    if (*event).type_ == YAML_SEQUENCE_END_EVENT {
        let fresh13 = addr_of_mut!((*emitter).flow_level);
        *fresh13 -= 1;
        (*emitter).indent = POP!((*emitter).indents);
        if (*emitter).canonical && !first {
            if yaml_emitter_write_indicator(
                emitter,
                b",\0" as *const u8 as *const libc::c_char,
                false,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        if yaml_emitter_write_indicator(
            emitter,
            b"]\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
        (*emitter).state = POP!((*emitter).states);
        return OK;
    }
    if !first {
        if yaml_emitter_write_indicator(
            emitter,
            b",\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    }
    if (*emitter).canonical || (*emitter).column > (*emitter).best_width {
        if yaml_emitter_write_indent(emitter).fail {
            return FAIL;
        }
    }
    PUSH!((*emitter).states, YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE);
    yaml_emitter_emit_node(emitter, event, false, true, false, false)
}

unsafe fn yaml_emitter_emit_flow_mapping_key(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    first: bool,
) -> Success {
    if first {
        if yaml_emitter_write_indicator(
            emitter,
            b"{\0" as *const u8 as *const libc::c_char,
            true,
            true,
            false,
        )
        .fail
        {
            return FAIL;
        }
        yaml_emitter_increase_indent(emitter, true, false);
        let fresh18 = addr_of_mut!((*emitter).flow_level);
        *fresh18 += 1;
    }
    if (*event).type_ == YAML_MAPPING_END_EVENT {
        if STACK_EMPTY!((*emitter).indents) {
            return FAIL;
        }
        let fresh19 = addr_of_mut!((*emitter).flow_level);
        *fresh19 -= 1;
        (*emitter).indent = POP!((*emitter).indents);
        if (*emitter).canonical && !first {
            if yaml_emitter_write_indicator(
                emitter,
                b",\0" as *const u8 as *const libc::c_char,
                false,
                false,
                false,
            )
            .fail
            {
                return FAIL;
            }
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        if yaml_emitter_write_indicator(
            emitter,
            b"}\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
        (*emitter).state = POP!((*emitter).states);
        return OK;
    }
    if !first {
        if yaml_emitter_write_indicator(
            emitter,
            b",\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    }
    if (*emitter).canonical || (*emitter).column > (*emitter).best_width {
        if yaml_emitter_write_indent(emitter).fail {
            return FAIL;
        }
    }
    if !(*emitter).canonical && yaml_emitter_check_simple_key(emitter) {
        PUSH!((*emitter).states, YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE);
        yaml_emitter_emit_node(emitter, event, false, false, true, true)
    } else {
        if yaml_emitter_write_indicator(
            emitter,
            b"?\0" as *const u8 as *const libc::c_char,
            true,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
        PUSH!((*emitter).states, YAML_EMIT_FLOW_MAPPING_VALUE_STATE);
        yaml_emitter_emit_node(emitter, event, false, false, true, false)
    }
}

unsafe fn yaml_emitter_emit_flow_mapping_value(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    simple: bool,
) -> Success {
    if simple {
        if yaml_emitter_write_indicator(
            emitter,
            b":\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    } else {
        if (*emitter).canonical || (*emitter).column > (*emitter).best_width {
            if yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
        }
        if yaml_emitter_write_indicator(
            emitter,
            b":\0" as *const u8 as *const libc::c_char,
            true,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    }
    PUSH!((*emitter).states, YAML_EMIT_FLOW_MAPPING_KEY_STATE);
    yaml_emitter_emit_node(emitter, event, false, false, true, false)
}

unsafe fn yaml_emitter_emit_block_sequence_item(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    first: bool,
) -> Success {
    if first {
        yaml_emitter_increase_indent(
            emitter,
            false,
            (*emitter).mapping_context && !(*emitter).indention,
        );
    }
    if (*event).type_ == YAML_SEQUENCE_END_EVENT {
        (*emitter).indent = POP!((*emitter).indents);
        (*emitter).state = POP!((*emitter).states);
        return OK;
    }
    if yaml_emitter_write_indent(emitter).fail {
        return FAIL;
    }
    if yaml_emitter_write_indicator(
        emitter,
        b"-\0" as *const u8 as *const libc::c_char,
        true,
        false,
        true,
    )
    .fail
    {
        return FAIL;
    }
    PUSH!((*emitter).states, YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE);
    yaml_emitter_emit_node(emitter, event, false, true, false, false)
}

unsafe fn yaml_emitter_emit_block_mapping_key(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    first: bool,
) -> Success {
    if first {
        yaml_emitter_increase_indent(emitter, false, false);
    }
    if (*event).type_ == YAML_MAPPING_END_EVENT {
        (*emitter).indent = POP!((*emitter).indents);
        (*emitter).state = POP!((*emitter).states);
        return OK;
    }
    if yaml_emitter_write_indent(emitter).fail {
        return FAIL;
    }
    if yaml_emitter_check_simple_key(emitter) {
        PUSH!(
            (*emitter).states,
            YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE
        );
        yaml_emitter_emit_node(emitter, event, false, false, true, true)
    } else {
        if yaml_emitter_write_indicator(
            emitter,
            b"?\0" as *const u8 as *const libc::c_char,
            true,
            false,
            true,
        )
        .fail
        {
            return FAIL;
        }
        PUSH!((*emitter).states, YAML_EMIT_BLOCK_MAPPING_VALUE_STATE);
        yaml_emitter_emit_node(emitter, event, false, false, true, false)
    }
}

unsafe fn yaml_emitter_emit_block_mapping_value(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    simple: bool,
) -> Success {
    if simple {
        if yaml_emitter_write_indicator(
            emitter,
            b":\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    } else {
        if yaml_emitter_write_indent(emitter).fail {
            return FAIL;
        }
        if yaml_emitter_write_indicator(
            emitter,
            b":\0" as *const u8 as *const libc::c_char,
            true,
            false,
            true,
        )
        .fail
        {
            return FAIL;
        }
    }
    PUSH!((*emitter).states, YAML_EMIT_BLOCK_MAPPING_KEY_STATE);
    yaml_emitter_emit_node(emitter, event, false, false, true, false)
}

unsafe fn yaml_emitter_emit_node(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
    root: bool,
    sequence: bool,
    mapping: bool,
    simple_key: bool,
) -> Success {
    (*emitter).root_context = root;
    (*emitter).sequence_context = sequence;
    (*emitter).mapping_context = mapping;
    (*emitter).simple_key_context = simple_key;
    match (*event).type_ {
        YAML_ALIAS_EVENT => yaml_emitter_emit_alias(emitter, event),
        YAML_SCALAR_EVENT => yaml_emitter_emit_scalar(emitter, event),
        YAML_SEQUENCE_START_EVENT => yaml_emitter_emit_sequence_start(emitter, event),
        YAML_MAPPING_START_EVENT => yaml_emitter_emit_mapping_start(emitter, event),
        _ => yaml_emitter_set_emitter_error(
            emitter,
            b"expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS\0" as *const u8
                as *const libc::c_char,
        ),
    }
}

unsafe fn yaml_emitter_emit_alias(
    emitter: *mut yaml_emitter_t,
    _event: *mut yaml_event_t,
) -> Success {
    if yaml_emitter_process_anchor(emitter).fail {
        return FAIL;
    }
    if (*emitter).simple_key_context {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    (*emitter).state = POP!((*emitter).states);
    OK
}

unsafe fn yaml_emitter_emit_scalar(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    if yaml_emitter_select_scalar_style(emitter, event).fail {
        return FAIL;
    }
    if yaml_emitter_process_anchor(emitter).fail {
        return FAIL;
    }
    if yaml_emitter_process_tag(emitter).fail {
        return FAIL;
    }
    yaml_emitter_increase_indent(emitter, true, false);
    if yaml_emitter_process_scalar(emitter).fail {
        return FAIL;
    }
    (*emitter).indent = POP!((*emitter).indents);
    (*emitter).state = POP!((*emitter).states);
    OK
}

unsafe fn yaml_emitter_emit_sequence_start(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    if yaml_emitter_process_anchor(emitter).fail {
        return FAIL;
    }
    if yaml_emitter_process_tag(emitter).fail {
        return FAIL;
    }
    if (*emitter).flow_level != 0
        || (*emitter).canonical
        || (*event).data.sequence_start.style == YAML_FLOW_SEQUENCE_STYLE
        || yaml_emitter_check_empty_sequence(emitter)
    {
        (*emitter).state = YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE;
    } else {
        (*emitter).state = YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE;
    }
    OK
}

unsafe fn yaml_emitter_emit_mapping_start(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    if yaml_emitter_process_anchor(emitter).fail {
        return FAIL;
    }
    if yaml_emitter_process_tag(emitter).fail {
        return FAIL;
    }
    if (*emitter).flow_level != 0
        || (*emitter).canonical
        || (*event).data.mapping_start.style == YAML_FLOW_MAPPING_STYLE
        || yaml_emitter_check_empty_mapping(emitter)
    {
        (*emitter).state = YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE;
    } else {
        (*emitter).state = YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE;
    }
    OK
}

unsafe fn yaml_emitter_check_empty_document(_emitter: *mut yaml_emitter_t) -> bool {
    false
}

unsafe fn yaml_emitter_check_empty_sequence(emitter: *mut yaml_emitter_t) -> bool {
    if ((*emitter).events.tail.c_offset_from((*emitter).events.head) as libc::c_long) < 2_i64 {
        return false;
    }
    (*(*emitter).events.head).type_ == YAML_SEQUENCE_START_EVENT
        && (*(*emitter).events.head.wrapping_offset(1_isize)).type_ == YAML_SEQUENCE_END_EVENT
}

unsafe fn yaml_emitter_check_empty_mapping(emitter: *mut yaml_emitter_t) -> bool {
    if ((*emitter).events.tail.c_offset_from((*emitter).events.head) as libc::c_long) < 2_i64 {
        return false;
    }
    (*(*emitter).events.head).type_ == YAML_MAPPING_START_EVENT
        && (*(*emitter).events.head.wrapping_offset(1_isize)).type_ == YAML_MAPPING_END_EVENT
}

unsafe fn yaml_emitter_check_simple_key(emitter: *mut yaml_emitter_t) -> bool {
    let event: *mut yaml_event_t = (*emitter).events.head;
    let mut length: size_t = 0_u64;
    match (*event).type_ {
        YAML_ALIAS_EVENT => {
            length = (length as libc::c_ulong).wrapping_add((*emitter).anchor_data.anchor_length)
                as size_t as size_t;
        }
        YAML_SCALAR_EVENT => {
            if (*emitter).scalar_data.multiline {
                return false;
            }
            length = (length as libc::c_ulong).wrapping_add(
                (*emitter)
                    .anchor_data
                    .anchor_length
                    .wrapping_add((*emitter).tag_data.handle_length)
                    .wrapping_add((*emitter).tag_data.suffix_length)
                    .wrapping_add((*emitter).scalar_data.length),
            ) as size_t as size_t;
        }
        YAML_SEQUENCE_START_EVENT => {
            if !yaml_emitter_check_empty_sequence(emitter) {
                return false;
            }
            length = (length as libc::c_ulong).wrapping_add(
                (*emitter)
                    .anchor_data
                    .anchor_length
                    .wrapping_add((*emitter).tag_data.handle_length)
                    .wrapping_add((*emitter).tag_data.suffix_length),
            ) as size_t as size_t;
        }
        YAML_MAPPING_START_EVENT => {
            if !yaml_emitter_check_empty_mapping(emitter) {
                return false;
            }
            length = (length as libc::c_ulong).wrapping_add(
                (*emitter)
                    .anchor_data
                    .anchor_length
                    .wrapping_add((*emitter).tag_data.handle_length)
                    .wrapping_add((*emitter).tag_data.suffix_length),
            ) as size_t as size_t;
        }
        _ => return false,
    }
    if length > 128_u64 {
        return false;
    }
    true
}

unsafe fn yaml_emitter_select_scalar_style(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    let mut style: yaml_scalar_style_t = (*event).data.scalar.style;
    let no_tag = (*emitter).tag_data.handle.is_null() && (*emitter).tag_data.suffix.is_null();
    if no_tag && !(*event).data.scalar.plain_implicit && !(*event).data.scalar.quoted_implicit {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"neither tag nor implicit flags are specified\0" as *const u8 as *const libc::c_char,
        );
    }
    if style == YAML_ANY_SCALAR_STYLE {
        style = YAML_PLAIN_SCALAR_STYLE;
    }
    if (*emitter).canonical {
        style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;
    }
    if (*emitter).simple_key_context && (*emitter).scalar_data.multiline {
        style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;
    }
    if style == YAML_PLAIN_SCALAR_STYLE {
        if (*emitter).flow_level != 0 && !(*emitter).scalar_data.flow_plain_allowed
            || (*emitter).flow_level == 0 && !(*emitter).scalar_data.block_plain_allowed
        {
            style = YAML_SINGLE_QUOTED_SCALAR_STYLE;
        }
        if (*emitter).scalar_data.length == 0
            && ((*emitter).flow_level != 0 || (*emitter).simple_key_context)
        {
            style = YAML_SINGLE_QUOTED_SCALAR_STYLE;
        }
        if no_tag && !(*event).data.scalar.plain_implicit {
            style = YAML_SINGLE_QUOTED_SCALAR_STYLE;
        }
    }
    if style == YAML_SINGLE_QUOTED_SCALAR_STYLE {
        if !(*emitter).scalar_data.single_quoted_allowed {
            style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;
        }
    }
    if style == YAML_LITERAL_SCALAR_STYLE || style == YAML_FOLDED_SCALAR_STYLE {
        if !(*emitter).scalar_data.block_allowed
            || (*emitter).flow_level != 0
            || (*emitter).simple_key_context
        {
            style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;
        }
    }
    if no_tag && !(*event).data.scalar.quoted_implicit && style != YAML_PLAIN_SCALAR_STYLE {
        let fresh46 = addr_of_mut!((*emitter).tag_data.handle);
        *fresh46 = b"!\0" as *const u8 as *const libc::c_char as *mut yaml_char_t;
        (*emitter).tag_data.handle_length = 1_u64;
    }
    (*emitter).scalar_data.style = style;
    OK
}

unsafe fn yaml_emitter_process_anchor(emitter: *mut yaml_emitter_t) -> Success {
    if (*emitter).anchor_data.anchor.is_null() {
        return OK;
    }
    if yaml_emitter_write_indicator(
        emitter,
        if (*emitter).anchor_data.alias {
            b"*\0" as *const u8 as *const libc::c_char
        } else {
            b"&\0" as *const u8 as *const libc::c_char
        },
        true,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    yaml_emitter_write_anchor(
        emitter,
        (*emitter).anchor_data.anchor,
        (*emitter).anchor_data.anchor_length,
    )
}

unsafe fn yaml_emitter_process_tag(emitter: *mut yaml_emitter_t) -> Success {
    if (*emitter).tag_data.handle.is_null() && (*emitter).tag_data.suffix.is_null() {
        return OK;
    }
    if !(*emitter).tag_data.handle.is_null() {
        if yaml_emitter_write_tag_handle(
            emitter,
            (*emitter).tag_data.handle,
            (*emitter).tag_data.handle_length,
        )
        .fail
        {
            return FAIL;
        }
        if !(*emitter).tag_data.suffix.is_null() {
            if yaml_emitter_write_tag_content(
                emitter,
                (*emitter).tag_data.suffix,
                (*emitter).tag_data.suffix_length,
                false,
            )
            .fail
            {
                return FAIL;
            }
        }
    } else {
        if yaml_emitter_write_indicator(
            emitter,
            b"!<\0" as *const u8 as *const libc::c_char,
            true,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
        if yaml_emitter_write_tag_content(
            emitter,
            (*emitter).tag_data.suffix,
            (*emitter).tag_data.suffix_length,
            false,
        )
        .fail
        {
            return FAIL;
        }
        if yaml_emitter_write_indicator(
            emitter,
            b">\0" as *const u8 as *const libc::c_char,
            false,
            false,
            false,
        )
        .fail
        {
            return FAIL;
        }
    }
    OK
}

unsafe fn yaml_emitter_process_scalar(emitter: *mut yaml_emitter_t) -> Success {
    match (*emitter).scalar_data.style {
        YAML_PLAIN_SCALAR_STYLE => {
            return yaml_emitter_write_plain_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YAML_SINGLE_QUOTED_SCALAR_STYLE => {
            return yaml_emitter_write_single_quoted_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YAML_DOUBLE_QUOTED_SCALAR_STYLE => {
            return yaml_emitter_write_double_quoted_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YAML_LITERAL_SCALAR_STYLE => {
            return yaml_emitter_write_literal_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
            );
        }
        YAML_FOLDED_SCALAR_STYLE => {
            return yaml_emitter_write_folded_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
            );
        }
        _ => {}
    }
    FAIL
}

unsafe fn yaml_emitter_analyze_version_directive(
    emitter: *mut yaml_emitter_t,
    version_directive: yaml_version_directive_t,
) -> Success {
    if version_directive.major != 1 || version_directive.minor != 1 && version_directive.minor != 2
    {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"incompatible %YAML directive\0" as *const u8 as *const libc::c_char,
        );
    }
    OK
}

unsafe fn yaml_emitter_analyze_tag_directive(
    emitter: *mut yaml_emitter_t,
    tag_directive: yaml_tag_directive_t,
) -> Success {
    let handle_length: size_t = strlen(tag_directive.handle as *mut libc::c_char);
    let prefix_length: size_t = strlen(tag_directive.prefix as *mut libc::c_char);
    let mut handle = STRING_ASSIGN!(tag_directive.handle, handle_length);
    let prefix = STRING_ASSIGN!(tag_directive.prefix, prefix_length);
    if handle.start == handle.end {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"tag handle must not be empty\0" as *const u8 as *const libc::c_char,
        );
    }
    if *handle.start != b'!' {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"tag handle must start with '!'\0" as *const u8 as *const libc::c_char,
        );
    }
    if *handle.end.wrapping_offset(-1_isize) != b'!' {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"tag handle must end with '!'\0" as *const u8 as *const libc::c_char,
        );
    }
    handle.pointer = handle.pointer.wrapping_offset(1);
    while handle.pointer < handle.end.wrapping_offset(-1_isize) {
        if !IS_ALPHA!(handle) {
            return yaml_emitter_set_emitter_error(
                emitter,
                b"tag handle must contain alphanumerical characters only\0" as *const u8
                    as *const libc::c_char,
            );
        }
        MOVE!(handle);
    }
    if prefix.start == prefix.end {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"tag prefix must not be empty\0" as *const u8 as *const libc::c_char,
        );
    }
    OK
}

unsafe fn yaml_emitter_analyze_anchor(
    emitter: *mut yaml_emitter_t,
    anchor: *mut yaml_char_t,
    alias: bool,
) -> Success {
    let anchor_length: size_t = strlen(anchor as *mut libc::c_char);
    let mut string = STRING_ASSIGN!(anchor, anchor_length);
    if string.start == string.end {
        return yaml_emitter_set_emitter_error(
            emitter,
            if alias {
                b"alias value must not be empty\0" as *const u8 as *const libc::c_char
            } else {
                b"anchor value must not be empty\0" as *const u8 as *const libc::c_char
            },
        );
    }
    while string.pointer != string.end {
        if !IS_ALPHA!(string) {
            return yaml_emitter_set_emitter_error(
                emitter,
                if alias {
                    b"alias value must contain alphanumerical characters only\0" as *const u8
                        as *const libc::c_char
                } else {
                    b"anchor value must contain alphanumerical characters only\0" as *const u8
                        as *const libc::c_char
                },
            );
        }
        MOVE!(string);
    }
    let fresh47 = addr_of_mut!((*emitter).anchor_data.anchor);
    *fresh47 = string.start;
    (*emitter).anchor_data.anchor_length =
        string.end.c_offset_from(string.start) as libc::c_long as size_t;
    (*emitter).anchor_data.alias = alias;
    OK
}

unsafe fn yaml_emitter_analyze_tag(emitter: *mut yaml_emitter_t, tag: *mut yaml_char_t) -> Success {
    let mut tag_directive: *mut yaml_tag_directive_t;
    let tag_length: size_t = strlen(tag as *mut libc::c_char);
    let string = STRING_ASSIGN!(tag, tag_length);
    if string.start == string.end {
        return yaml_emitter_set_emitter_error(
            emitter,
            b"tag value must not be empty\0" as *const u8 as *const libc::c_char,
        );
    }
    tag_directive = (*emitter).tag_directives.start;
    while tag_directive != (*emitter).tag_directives.top {
        let prefix_length: size_t = strlen((*tag_directive).prefix as *mut libc::c_char);
        if prefix_length < string.end.c_offset_from(string.start) as libc::c_long as size_t
            && strncmp(
                (*tag_directive).prefix as *mut libc::c_char,
                string.start as *mut libc::c_char,
                prefix_length,
            ) == 0
        {
            let fresh48 = addr_of_mut!((*emitter).tag_data.handle);
            *fresh48 = (*tag_directive).handle;
            (*emitter).tag_data.handle_length =
                strlen((*tag_directive).handle as *mut libc::c_char);
            let fresh49 = addr_of_mut!((*emitter).tag_data.suffix);
            *fresh49 = string.start.wrapping_offset(prefix_length as isize);
            (*emitter).tag_data.suffix_length = (string.end.c_offset_from(string.start)
                as libc::c_long as libc::c_ulong)
                .wrapping_sub(prefix_length);
            return OK;
        }
        tag_directive = tag_directive.wrapping_offset(1);
    }
    let fresh50 = addr_of_mut!((*emitter).tag_data.suffix);
    *fresh50 = string.start;
    (*emitter).tag_data.suffix_length =
        string.end.c_offset_from(string.start) as libc::c_long as size_t;
    OK
}

unsafe fn yaml_emitter_analyze_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut block_indicators = false;
    let mut flow_indicators = false;
    let mut line_breaks = false;
    let mut special_characters = false;
    let mut leading_space = false;
    let mut leading_break = false;
    let mut trailing_space = false;
    let mut trailing_break = false;
    let mut break_space = false;
    let mut space_break = false;
    let mut preceded_by_whitespace;
    let mut followed_by_whitespace;
    let mut previous_space = false;
    let mut previous_break = false;
    let mut string = STRING_ASSIGN!(value, length);
    let fresh51 = addr_of_mut!((*emitter).scalar_data.value);
    *fresh51 = value;
    (*emitter).scalar_data.length = length;
    if string.start == string.end {
        (*emitter).scalar_data.multiline = false;
        (*emitter).scalar_data.flow_plain_allowed = false;
        (*emitter).scalar_data.block_plain_allowed = true;
        (*emitter).scalar_data.single_quoted_allowed = true;
        (*emitter).scalar_data.block_allowed = false;
        return OK;
    }
    if CHECK_AT!(string, b'-', 0) && CHECK_AT!(string, b'-', 1) && CHECK_AT!(string, b'-', 2)
        || CHECK_AT!(string, b'.', 0) && CHECK_AT!(string, b'.', 1) && CHECK_AT!(string, b'.', 2)
    {
        block_indicators = true;
        flow_indicators = true;
    }
    preceded_by_whitespace = true;
    followed_by_whitespace = IS_BLANKZ_AT!(string, WIDTH!(string));
    while string.pointer != string.end {
        if string.start == string.pointer {
            if CHECK!(string, b'#')
                || CHECK!(string, b',')
                || CHECK!(string, b'[')
                || CHECK!(string, b']')
                || CHECK!(string, b'{')
                || CHECK!(string, b'}')
                || CHECK!(string, b'&')
                || CHECK!(string, b'*')
                || CHECK!(string, b'!')
                || CHECK!(string, b'|')
                || CHECK!(string, b'>')
                || CHECK!(string, b'\'')
                || CHECK!(string, b'"')
                || CHECK!(string, b'%')
                || CHECK!(string, b'@')
                || CHECK!(string, b'`')
            {
                flow_indicators = true;
                block_indicators = true;
            }
            if CHECK!(string, b'?') || CHECK!(string, b':') {
                flow_indicators = true;
                if followed_by_whitespace {
                    block_indicators = true;
                }
            }
            if CHECK!(string, b'-') && followed_by_whitespace {
                flow_indicators = true;
                block_indicators = true;
            }
        } else {
            if CHECK!(string, b',')
                || CHECK!(string, b'?')
                || CHECK!(string, b'[')
                || CHECK!(string, b']')
                || CHECK!(string, b'{')
                || CHECK!(string, b'}')
            {
                flow_indicators = true;
            }
            if CHECK!(string, b':') {
                flow_indicators = true;
                if followed_by_whitespace {
                    block_indicators = true;
                }
            }
            if CHECK!(string, b'#') && preceded_by_whitespace {
                flow_indicators = true;
                block_indicators = true;
            }
        }
        if !IS_PRINTABLE!(string) || !IS_ASCII!(string) && !(*emitter).unicode {
            special_characters = true;
        }
        if IS_BREAK!(string) {
            line_breaks = true;
        }
        if IS_SPACE!(string) {
            if string.start == string.pointer {
                leading_space = true;
            }
            if string.pointer.wrapping_offset(WIDTH!(string) as isize) == string.end {
                trailing_space = true;
            }
            if previous_break {
                break_space = true;
            }
            previous_space = true;
            previous_break = false;
        } else if IS_BREAK!(string) {
            if string.start == string.pointer {
                leading_break = true;
            }
            if string.pointer.wrapping_offset(WIDTH!(string) as isize) == string.end {
                trailing_break = true;
            }
            if previous_space {
                space_break = true;
            }
            previous_space = false;
            previous_break = true;
        } else {
            previous_space = false;
            previous_break = false;
        }
        preceded_by_whitespace = IS_BLANKZ!(string);
        MOVE!(string);
        if string.pointer != string.end {
            followed_by_whitespace = IS_BLANKZ_AT!(string, WIDTH!(string));
        }
    }
    (*emitter).scalar_data.multiline = line_breaks;
    (*emitter).scalar_data.flow_plain_allowed = true;
    (*emitter).scalar_data.block_plain_allowed = true;
    (*emitter).scalar_data.single_quoted_allowed = true;
    (*emitter).scalar_data.block_allowed = true;
    if leading_space || leading_break || trailing_space || trailing_break {
        (*emitter).scalar_data.flow_plain_allowed = false;
        (*emitter).scalar_data.block_plain_allowed = false;
    }
    if trailing_space {
        (*emitter).scalar_data.block_allowed = false;
    }
    if break_space {
        (*emitter).scalar_data.flow_plain_allowed = false;
        (*emitter).scalar_data.block_plain_allowed = false;
        (*emitter).scalar_data.single_quoted_allowed = false;
    }
    if space_break || special_characters {
        (*emitter).scalar_data.flow_plain_allowed = false;
        (*emitter).scalar_data.block_plain_allowed = false;
        (*emitter).scalar_data.single_quoted_allowed = false;
        (*emitter).scalar_data.block_allowed = false;
    }
    if line_breaks {
        (*emitter).scalar_data.flow_plain_allowed = false;
        (*emitter).scalar_data.block_plain_allowed = false;
    }
    if flow_indicators {
        (*emitter).scalar_data.flow_plain_allowed = false;
    }
    if block_indicators {
        (*emitter).scalar_data.block_plain_allowed = false;
    }
    OK
}

unsafe fn yaml_emitter_analyze_event(
    emitter: *mut yaml_emitter_t,
    event: *mut yaml_event_t,
) -> Success {
    let fresh52 = addr_of_mut!((*emitter).anchor_data.anchor);
    *fresh52 = ptr::null_mut::<yaml_char_t>();
    (*emitter).anchor_data.anchor_length = 0_u64;
    let fresh53 = addr_of_mut!((*emitter).tag_data.handle);
    *fresh53 = ptr::null_mut::<yaml_char_t>();
    (*emitter).tag_data.handle_length = 0_u64;
    let fresh54 = addr_of_mut!((*emitter).tag_data.suffix);
    *fresh54 = ptr::null_mut::<yaml_char_t>();
    (*emitter).tag_data.suffix_length = 0_u64;
    let fresh55 = addr_of_mut!((*emitter).scalar_data.value);
    *fresh55 = ptr::null_mut::<yaml_char_t>();
    (*emitter).scalar_data.length = 0_u64;
    match (*event).type_ {
        YAML_ALIAS_EVENT => yaml_emitter_analyze_anchor(emitter, (*event).data.alias.anchor, true),
        YAML_SCALAR_EVENT => {
            if !(*event).data.scalar.anchor.is_null() {
                if yaml_emitter_analyze_anchor(emitter, (*event).data.scalar.anchor, false).fail {
                    return FAIL;
                }
            }
            if !(*event).data.scalar.tag.is_null()
                && ((*emitter).canonical
                    || !(*event).data.scalar.plain_implicit
                        && !(*event).data.scalar.quoted_implicit)
            {
                if yaml_emitter_analyze_tag(emitter, (*event).data.scalar.tag).fail {
                    return FAIL;
                }
            }
            yaml_emitter_analyze_scalar(
                emitter,
                (*event).data.scalar.value,
                (*event).data.scalar.length,
            )
        }
        YAML_SEQUENCE_START_EVENT => {
            if !(*event).data.sequence_start.anchor.is_null() {
                if yaml_emitter_analyze_anchor(emitter, (*event).data.sequence_start.anchor, false)
                    .fail
                {
                    return FAIL;
                }
            }
            if !(*event).data.sequence_start.tag.is_null()
                && ((*emitter).canonical || !(*event).data.sequence_start.implicit)
            {
                if yaml_emitter_analyze_tag(emitter, (*event).data.sequence_start.tag).fail {
                    return FAIL;
                }
            }
            OK
        }
        YAML_MAPPING_START_EVENT => {
            if !(*event).data.mapping_start.anchor.is_null() {
                if yaml_emitter_analyze_anchor(emitter, (*event).data.mapping_start.anchor, false)
                    .fail
                {
                    return FAIL;
                }
            }
            if !(*event).data.mapping_start.tag.is_null()
                && ((*emitter).canonical || !(*event).data.mapping_start.implicit)
            {
                if yaml_emitter_analyze_tag(emitter, (*event).data.mapping_start.tag).fail {
                    return FAIL;
                }
            }
            OK
        }
        _ => OK,
    }
}

unsafe fn yaml_emitter_write_bom(emitter: *mut yaml_emitter_t) -> Success {
    if FLUSH(emitter).fail {
        return FAIL;
    }
    let fresh56 = addr_of_mut!((*emitter).buffer.pointer);
    let fresh57 = *fresh56;
    *fresh56 = (*fresh56).wrapping_offset(1);
    *fresh57 = b'\xEF';
    let fresh58 = addr_of_mut!((*emitter).buffer.pointer);
    let fresh59 = *fresh58;
    *fresh58 = (*fresh58).wrapping_offset(1);
    *fresh59 = b'\xBB';
    let fresh60 = addr_of_mut!((*emitter).buffer.pointer);
    let fresh61 = *fresh60;
    *fresh60 = (*fresh60).wrapping_offset(1);
    *fresh61 = b'\xBF';
    OK
}

unsafe fn yaml_emitter_write_indent(emitter: *mut yaml_emitter_t) -> Success {
    let indent: libc::c_int = if (*emitter).indent >= 0 {
        (*emitter).indent
    } else {
        0
    };
    if !(*emitter).indention
        || (*emitter).column > indent
        || (*emitter).column == indent && !(*emitter).whitespace
    {
        if PUT_BREAK(emitter).fail {
            return FAIL;
        }
    }
    while (*emitter).column < indent {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    (*emitter).whitespace = true;
    (*emitter).indention = true;
    OK
}

unsafe fn yaml_emitter_write_indicator(
    emitter: *mut yaml_emitter_t,
    indicator: *const libc::c_char,
    need_whitespace: bool,
    is_whitespace: bool,
    is_indention: bool,
) -> Success {
    let indicator_length: size_t = strlen(indicator);
    let mut string = STRING_ASSIGN!(indicator as *mut yaml_char_t, indicator_length);
    if need_whitespace && !(*emitter).whitespace {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    while string.pointer != string.end {
        if WRITE!(emitter, string).fail {
            return FAIL;
        }
    }
    (*emitter).whitespace = is_whitespace;
    (*emitter).indention = (*emitter).indention && is_indention;
    OK
}

unsafe fn yaml_emitter_write_anchor(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut string = STRING_ASSIGN!(value, length);
    while string.pointer != string.end {
        if WRITE!(emitter, string).fail {
            return FAIL;
        }
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_tag_handle(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut string = STRING_ASSIGN!(value, length);
    if !(*emitter).whitespace {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    while string.pointer != string.end {
        if WRITE!(emitter, string).fail {
            return FAIL;
        }
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_tag_content(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
    need_whitespace: bool,
) -> Success {
    let mut string = STRING_ASSIGN!(value, length);
    if need_whitespace && !(*emitter).whitespace {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    while string.pointer != string.end {
        if IS_ALPHA!(string)
            || CHECK!(string, b';')
            || CHECK!(string, b'/')
            || CHECK!(string, b'?')
            || CHECK!(string, b':')
            || CHECK!(string, b'@')
            || CHECK!(string, b'&')
            || CHECK!(string, b'=')
            || CHECK!(string, b'+')
            || CHECK!(string, b'$')
            || CHECK!(string, b',')
            || CHECK!(string, b'_')
            || CHECK!(string, b'.')
            || CHECK!(string, b'~')
            || CHECK!(string, b'*')
            || CHECK!(string, b'\'')
            || CHECK!(string, b'(')
            || CHECK!(string, b')')
            || CHECK!(string, b'[')
            || CHECK!(string, b']')
        {
            if WRITE!(emitter, string).fail {
                return FAIL;
            }
        } else {
            let mut width = WIDTH!(string);
            loop {
                let fresh207 = width;
                width -= 1;
                if !(fresh207 != 0) {
                    break;
                }
                let fresh208 = string.pointer;
                string.pointer = string.pointer.wrapping_offset(1);
                let value = *fresh208;
                if PUT(emitter, b'%').fail {
                    return FAIL;
                }
                if PUT(
                    emitter,
                    (value >> 4).wrapping_add(if (value >> 4) < 10 { b'0' } else { b'A' - 10 }),
                )
                .fail
                {
                    return FAIL;
                }
                if PUT(
                    emitter,
                    (value & 0x0F).wrapping_add(if (value & 0x0F) < 10 { b'0' } else { b'A' - 10 }),
                )
                .fail
                {
                    return FAIL;
                }
            }
        }
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_plain_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
    allow_breaks: bool,
) -> Success {
    let mut spaces = false;
    let mut breaks = false;
    let mut string = STRING_ASSIGN!(value, length);
    if !(*emitter).whitespace && (length != 0 || (*emitter).flow_level != 0) {
        if PUT(emitter, b' ').fail {
            return FAIL;
        }
    }
    while string.pointer != string.end {
        if IS_SPACE!(string) {
            if allow_breaks
                && !spaces
                && (*emitter).column > (*emitter).best_width
                && !IS_SPACE_AT!(string, 1)
            {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                MOVE!(string);
            } else if WRITE!(emitter, string).fail {
                return FAIL;
            }
            spaces = true;
        } else if IS_BREAK!(string) {
            if !breaks && CHECK!(string, b'\n') {
                if PUT_BREAK(emitter).fail {
                    return FAIL;
                }
            }
            if WRITE_BREAK!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
            }
            if WRITE!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = false;
            spaces = false;
            breaks = false;
        }
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_single_quoted_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
    allow_breaks: bool,
) -> Success {
    let mut spaces = false;
    let mut breaks = false;
    let mut string = STRING_ASSIGN!(value, length);
    if yaml_emitter_write_indicator(
        emitter,
        b"'\0" as *const u8 as *const libc::c_char,
        true,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    while string.pointer != string.end {
        if IS_SPACE!(string) {
            if allow_breaks
                && !spaces
                && (*emitter).column > (*emitter).best_width
                && string.pointer != string.start
                && string.pointer != string.end.wrapping_offset(-1_isize)
                && !IS_SPACE_AT!(string, 1)
            {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                MOVE!(string);
            } else if WRITE!(emitter, string).fail {
                return FAIL;
            }
            spaces = true;
        } else if IS_BREAK!(string) {
            if !breaks && CHECK!(string, b'\n') {
                if PUT_BREAK(emitter).fail {
                    return FAIL;
                }
            }
            if WRITE_BREAK!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
            }
            if CHECK!(string, b'\'') {
                if PUT(emitter, b'\'').fail {
                    return FAIL;
                }
            }
            if WRITE!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = false;
            spaces = false;
            breaks = false;
        }
    }
    if breaks {
        if yaml_emitter_write_indent(emitter).fail {
            return FAIL;
        }
    }
    if yaml_emitter_write_indicator(
        emitter,
        b"'\0" as *const u8 as *const libc::c_char,
        false,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_double_quoted_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
    allow_breaks: bool,
) -> Success {
    let mut spaces = false;
    let mut string = STRING_ASSIGN!(value, length);
    if yaml_emitter_write_indicator(
        emitter,
        b"\"\0" as *const u8 as *const libc::c_char,
        true,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    while string.pointer != string.end {
        if !IS_PRINTABLE!(string)
            || !(*emitter).unicode && !IS_ASCII!(string)
            || IS_BOM!(string)
            || IS_BREAK!(string)
            || CHECK!(string, b'"')
            || CHECK!(string, b'\\')
        {
            let mut octet: libc::c_uchar;
            let mut width: libc::c_uint;
            let mut value_0: libc::c_uint;
            let mut k: libc::c_int;
            octet = *string.pointer;
            width = if octet & 0x80 == 0x00 {
                1
            } else if octet & 0xE0 == 0xC0 {
                2
            } else if octet & 0xF0 == 0xE0 {
                3
            } else if octet & 0xF8 == 0xF0 {
                4
            } else {
                0
            };
            value_0 = if octet & 0x80 == 0 {
                octet & 0x7F
            } else if octet & 0xE0 == 0xC0 {
                octet & 0x1F
            } else if octet & 0xF0 == 0xE0 {
                octet & 0x0F
            } else if octet & 0xF8 == 0xF0 {
                octet & 0x07
            } else {
                0
            } as libc::c_uint;
            k = 1;
            while k < width as libc::c_int {
                octet = *string.pointer.wrapping_offset(k as isize);
                value_0 = (value_0 << 6).wrapping_add((octet & 0x3F) as libc::c_uint);
                k += 1;
            }
            string.pointer = string.pointer.wrapping_offset(width as isize);
            if PUT(emitter, b'\\').fail {
                return FAIL;
            }
            match value_0 {
                0x00 => {
                    if PUT(emitter, b'0').fail {
                        return FAIL;
                    }
                }
                0x07 => {
                    if PUT(emitter, b'a').fail {
                        return FAIL;
                    }
                }
                0x08 => {
                    if PUT(emitter, b'b').fail {
                        return FAIL;
                    }
                }
                0x09 => {
                    if PUT(emitter, b't').fail {
                        return FAIL;
                    }
                }
                0x0A => {
                    if PUT(emitter, b'n').fail {
                        return FAIL;
                    }
                }
                0x0B => {
                    if PUT(emitter, b'v').fail {
                        return FAIL;
                    }
                }
                0x0C => {
                    if PUT(emitter, b'f').fail {
                        return FAIL;
                    }
                }
                0x0D => {
                    if PUT(emitter, b'r').fail {
                        return FAIL;
                    }
                }
                0x1B => {
                    if PUT(emitter, b'e').fail {
                        return FAIL;
                    }
                }
                0x22 => {
                    if PUT(emitter, b'"').fail {
                        return FAIL;
                    }
                }
                0x5C => {
                    if PUT(emitter, b'\\').fail {
                        return FAIL;
                    }
                }
                0x85 => {
                    if PUT(emitter, b'N').fail {
                        return FAIL;
                    }
                }
                0xA0 => {
                    if PUT(emitter, b'_').fail {
                        return FAIL;
                    }
                }
                0x2028 => {
                    if PUT(emitter, b'L').fail {
                        return FAIL;
                    }
                }
                0x2029 => {
                    if PUT(emitter, b'P').fail {
                        return FAIL;
                    }
                }
                _ => {
                    if value_0 <= 0xFF {
                        if PUT(emitter, b'x').fail {
                            return FAIL;
                        }
                        width = 2;
                    } else if value_0 <= 0xFFFF {
                        if PUT(emitter, b'u').fail {
                            return FAIL;
                        }
                        width = 4;
                    } else {
                        if PUT(emitter, b'U').fail {
                            return FAIL;
                        }
                        width = 8;
                    }
                    k = width.wrapping_sub(1).wrapping_mul(4) as libc::c_int;
                    while k >= 0 {
                        let digit: libc::c_int = (value_0 >> k & 0x0F) as libc::c_int;
                        if PUT(
                            emitter,
                            (digit + if digit < 10 { b'0' } else { b'A' - 10 } as i32) as u8,
                        )
                        .fail
                        {
                            return FAIL;
                        }
                        k -= 4;
                    }
                }
            }
            spaces = false;
        } else if IS_SPACE!(string) {
            if allow_breaks
                && !spaces
                && (*emitter).column > (*emitter).best_width
                && string.pointer != string.start
                && string.pointer != string.end.wrapping_offset(-1_isize)
            {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                if IS_SPACE_AT!(string, 1) {
                    if PUT(emitter, b'\\').fail {
                        return FAIL;
                    }
                }
                MOVE!(string);
            } else if WRITE!(emitter, string).fail {
                return FAIL;
            }
            spaces = true;
        } else {
            if WRITE!(emitter, string).fail {
                return FAIL;
            }
            spaces = false;
        }
    }
    if yaml_emitter_write_indicator(
        emitter,
        b"\"\0" as *const u8 as *const libc::c_char,
        false,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    (*emitter).whitespace = false;
    (*emitter).indention = false;
    OK
}

unsafe fn yaml_emitter_write_block_scalar_hints(
    emitter: *mut yaml_emitter_t,
    mut string: yaml_string_t,
) -> Success {
    let mut indent_hint: [libc::c_char; 2] = [0; 2];
    let mut chomp_hint: *const libc::c_char = ptr::null::<libc::c_char>();
    if IS_SPACE!(string) || IS_BREAK!(string) {
        indent_hint[0] = (b'0' as libc::c_int + (*emitter).best_indent) as libc::c_char;
        indent_hint[1] = '\0' as libc::c_char;
        if yaml_emitter_write_indicator(emitter, indent_hint.as_mut_ptr(), false, false, false).fail
        {
            return FAIL;
        }
    }
    (*emitter).open_ended = 0;
    string.pointer = string.end;
    if string.start == string.pointer {
        chomp_hint = b"-\0" as *const u8 as *const libc::c_char;
    } else {
        loop {
            string.pointer = string.pointer.wrapping_offset(-1);
            if !(*string.pointer & 0xC0 == 0x80) {
                break;
            }
        }
        if !IS_BREAK!(string) {
            chomp_hint = b"-\0" as *const u8 as *const libc::c_char;
        } else if string.start == string.pointer {
            chomp_hint = b"+\0" as *const u8 as *const libc::c_char;
            (*emitter).open_ended = 2;
        } else {
            loop {
                string.pointer = string.pointer.wrapping_offset(-1);
                if !(*string.pointer & 0xC0 == 0x80) {
                    break;
                }
            }
            if IS_BREAK!(string) {
                chomp_hint = b"+\0" as *const u8 as *const libc::c_char;
                (*emitter).open_ended = 2;
            }
        }
    }
    if !chomp_hint.is_null() {
        if yaml_emitter_write_indicator(emitter, chomp_hint, false, false, false).fail {
            return FAIL;
        }
    }
    OK
}

unsafe fn yaml_emitter_write_literal_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut breaks = true;
    let mut string = STRING_ASSIGN!(value, length);
    if yaml_emitter_write_indicator(
        emitter,
        b"|\0" as *const u8 as *const libc::c_char,
        true,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    if yaml_emitter_write_block_scalar_hints(emitter, string).fail {
        return FAIL;
    }
    if PUT_BREAK(emitter).fail {
        return FAIL;
    }
    (*emitter).indention = true;
    (*emitter).whitespace = true;
    while string.pointer != string.end {
        if IS_BREAK!(string) {
            if WRITE_BREAK!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
            }
            if WRITE!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = false;
            breaks = false;
        }
    }
    OK
}

unsafe fn yaml_emitter_write_folded_scalar(
    emitter: *mut yaml_emitter_t,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut breaks = true;
    let mut leading_spaces = true;
    let mut string = STRING_ASSIGN!(value, length);
    if yaml_emitter_write_indicator(
        emitter,
        b">\0" as *const u8 as *const libc::c_char,
        true,
        false,
        false,
    )
    .fail
    {
        return FAIL;
    }
    if yaml_emitter_write_block_scalar_hints(emitter, string).fail {
        return FAIL;
    }
    if PUT_BREAK(emitter).fail {
        return FAIL;
    }
    (*emitter).indention = true;
    (*emitter).whitespace = true;
    while string.pointer != string.end {
        if IS_BREAK!(string) {
            if !breaks && !leading_spaces && CHECK!(string, b'\n') {
                let mut k: libc::c_int = 0;
                while IS_BREAK_AT!(string, k as isize) {
                    k += WIDTH_AT!(string, k as isize);
                }
                if !IS_BLANKZ_AT!(string, k) {
                    if PUT_BREAK(emitter).fail {
                        return FAIL;
                    }
                }
            }
            if WRITE_BREAK!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                leading_spaces = IS_BLANK!(string);
            }
            if !breaks
                && IS_SPACE!(string)
                && !IS_SPACE_AT!(string, 1)
                && (*emitter).column > (*emitter).best_width
            {
                if yaml_emitter_write_indent(emitter).fail {
                    return FAIL;
                }
                MOVE!(string);
            } else if WRITE!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = false;
            breaks = false;
        }
    }
    OK
}