use crate::externs::{strcmp, strlen, strncmp};
use crate::internal::{yaml_queue_extend, yaml_stack_extend};
use crate::memory::{yaml_free, yaml_strdup};
use crate::ops::{ForceAdd as _, ForceMul as _};
use crate::success::{Success, FAIL, OK};
use crate::yaml::{size_t, yaml_char_t, YamlStringT};
use crate::{
    libc, yaml_emitter_flush, yaml_event_delete, PointerExt,
    YamlAliasEvent, YamlAnyBreak, YamlAnyEncoding, YamlAnyScalarStyle,
    YamlCrBreak, YamlCrlnBreak, YamlDocumentEndEvent,
    YamlDocumentStartEvent, YamlDoubleQuotedScalarStyle,
    YamlEmitBlockMappingFirstKeyState, YamlEmitBlockMappingKeyState,
    YamlEmitBlockMappingSimpleValueState,
    YamlEmitBlockMappingValueState,
    YamlEmitBlockSequenceFirstItemState,
    YamlEmitBlockSequenceItemState, YamlEmitDocumentContentState,
    YamlEmitDocumentEndState, YamlEmitDocumentStartState,
    YamlEmitEndState, YamlEmitFirstDocumentStartState,
    YamlEmitFlowMappingFirstKeyState, YamlEmitFlowMappingKeyState,
    YamlEmitFlowMappingSimpleValueState, YamlEmitFlowMappingValueState,
    YamlEmitFlowSequenceFirstItemState, YamlEmitFlowSequenceItemState,
    YamlEmitStreamStartState, YamlEmitterError, YamlEmitterT,
    YamlEventT, YamlFlowMappingStyle, YamlFlowSequenceStyle,
    YamlFoldedScalarStyle, YamlLiteralScalarStyle, YamlLnBreak,
    YamlMappingEndEvent, YamlMappingStartEvent, YamlPlainScalarStyle,
    YamlScalarEvent, YamlScalarStyleT, YamlSequenceEndEvent,
    YamlSequenceStartEvent, YamlSingleQuotedScalarStyle,
    YamlStreamEndEvent, YamlStreamStartEvent, YamlTagDirectiveT,
    YamlUtf8Encoding, YamlVersionDirectiveT,
};
use core::ptr::{self, addr_of_mut};

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

unsafe fn put(emitter: *mut YamlEmitterT, 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 YamlEmitterT) -> Success {
    if flush(emitter).fail {
        return FAIL;
    }
    if (*emitter).line_break == YamlCrBreak {
        let fresh62 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh63 = *fresh62;
        *fresh62 = (*fresh62).wrapping_offset(1);
        *fresh63 = b'\r';
    } else if (*emitter).line_break == YamlLnBreak {
        let fresh64 = addr_of_mut!((*emitter).buffer.pointer);
        let fresh65 = *fresh64;
        *fresh64 = (*fresh64).wrapping_offset(1);
        *fresh65 = b'\n';
    } else if (*emitter).line_break == YamlCrlnBreak {
        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 YamlEmitterT,
    string: *mut YamlStringT,
) -> 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 YamlEmitterT,
    string: *mut YamlStringT,
) -> 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 YamlEmitterT,
    problem: *const libc::c_char,
) -> Success {
    (*emitter).error = YamlEmitterError;
    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.
///
/// # Safety
///
/// - `emitter` must be a valid, non-null pointer to a properly initialized `YamlEmitterT` struct.
/// - `event` must be a valid, non-null pointer to a `YamlEventT` struct that can be safely read from and will be destroyed by the function.
/// - The `YamlEmitterT` and `YamlEventT` structs must be properly aligned and have the expected memory layout.
/// - The `YamlEmitterT` struct must be in a valid state to emit the provided event.
pub unsafe fn yaml_emitter_emit(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
) -> 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 YamlEmitterT,
) -> Success {
    let mut level: libc::c_int = 0;
    let mut event: *mut YamlEventT;
    if QUEUE_EMPTY!((*emitter).events) {
        return OK;
    }
    let accumulate = match (*(*emitter).events.head).type_ {
        YamlDocumentStartEvent => 1,
        YamlSequenceStartEvent => 2,
        YamlMappingStartEvent => 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_ {
            YamlStreamStartEvent
            | YamlDocumentStartEvent
            | YamlSequenceStartEvent
            | YamlMappingStartEvent => {
                level += 1;
            }
            YamlStreamEndEvent | YamlDocumentEndEvent
            | YamlSequenceEndEvent | YamlMappingEndEvent => {
                level -= 1;
            }
            _ => {}
        }
        if level == 0 {
            return FAIL;
        }
        event = event.wrapping_offset(1);
    }
    OK
}

unsafe fn yaml_emitter_append_tag_directive(
    emitter: *mut YamlEmitterT,
    value: YamlTagDirectiveT,
    allow_duplicates: bool,
) -> Success {
    let mut tag_directive: *mut YamlTagDirectiveT;
    let mut copy = YamlTagDirectiveT {
        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 YamlEmitterT,
    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 YamlEmitterT,
    event: *mut YamlEventT,
) -> Success {
    match (*emitter).state {
        YamlEmitStreamStartState => {
            yaml_emitter_emit_stream_start(emitter, event)
        }
        YamlEmitFirstDocumentStartState => {
            yaml_emitter_emit_document_start(emitter, event, true)
        }
        YamlEmitDocumentStartState => {
            yaml_emitter_emit_document_start(emitter, event, false)
        }
        YamlEmitDocumentContentState => {
            yaml_emitter_emit_document_content(emitter, event)
        }
        YamlEmitDocumentEndState => {
            yaml_emitter_emit_document_end(emitter, event)
        }
        YamlEmitFlowSequenceFirstItemState => {
            yaml_emitter_emit_flow_sequence_item(emitter, event, true)
        }
        YamlEmitFlowSequenceItemState => {
            yaml_emitter_emit_flow_sequence_item(emitter, event, false)
        }
        YamlEmitFlowMappingFirstKeyState => {
            yaml_emitter_emit_flow_mapping_key(emitter, event, true)
        }
        YamlEmitFlowMappingKeyState => {
            yaml_emitter_emit_flow_mapping_key(emitter, event, false)
        }
        YamlEmitFlowMappingSimpleValueState => {
            yaml_emitter_emit_flow_mapping_value(emitter, event, true)
        }
        YamlEmitFlowMappingValueState => {
            yaml_emitter_emit_flow_mapping_value(emitter, event, false)
        }
        YamlEmitBlockSequenceFirstItemState => {
            yaml_emitter_emit_block_sequence_item(emitter, event, true)
        }
        YamlEmitBlockSequenceItemState => {
            yaml_emitter_emit_block_sequence_item(emitter, event, false)
        }
        YamlEmitBlockMappingFirstKeyState => {
            yaml_emitter_emit_block_mapping_key(emitter, event, true)
        }
        YamlEmitBlockMappingKeyState => {
            yaml_emitter_emit_block_mapping_key(emitter, event, false)
        }
        YamlEmitBlockMappingSimpleValueState => {
            yaml_emitter_emit_block_mapping_value(emitter, event, true)
        }
        YamlEmitBlockMappingValueState => {
            yaml_emitter_emit_block_mapping_value(emitter, event, false)
        }
        YamlEmitEndState => 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 YamlEmitterT,
    event: *mut YamlEventT,
) -> Success {
    (*emitter).open_ended = 0;
    if (*event).type_ == YamlStreamStartEvent {
        if (*emitter).encoding == YamlAnyEncoding {
            (*emitter).encoding = (*event).data.stream_start.encoding;
        }
        if (*emitter).encoding == YamlAnyEncoding {
            (*emitter).encoding = YamlUtf8Encoding;
        }
        if (*emitter).best_indent < 2 || (*emitter).best_indent > 9 {
            (*emitter).best_indent = 2;
        }
        if (*emitter).best_width >= 0
            && (*emitter).best_width
                <= (*emitter).best_indent.force_mul(2)
        {
            (*emitter).best_width = 80;
        }
        if (*emitter).best_width < 0 {
            (*emitter).best_width = libc::c_int::MAX;
        }
        if (*emitter).line_break == YamlAnyBreak {
            (*emitter).line_break = YamlLnBreak;
        }
        (*emitter).indent = -1;
        (*emitter).line = 0;
        (*emitter).column = 0;
        (*emitter).whitespace = true;
        (*emitter).indention = true;
        if (*emitter).encoding != YamlUtf8Encoding
            && yaml_emitter_write_bom(emitter).fail
        {
            return FAIL;
        }
        (*emitter).state = YamlEmitFirstDocumentStartState;
        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 YamlEmitterT,
    event: *mut YamlEventT,
    first: bool,
) -> Success {
    if (*event).type_ == YamlDocumentStartEvent {
        let mut default_tag_directives: [YamlTagDirectiveT; 3] = [
            YamlTagDirectiveT {
                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,
            },
            YamlTagDirectiveT {
                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,
            },
            YamlTagDirectiveT {
                handle: ptr::null_mut::<yaml_char_t>(),
                prefix: ptr::null_mut::<yaml_char_t>(),
            },
        ];
        let mut tag_directive: *mut YamlTagDirectiveT;
        let mut implicit;
        if !(*event).data.document_start.version_directive.is_null()
            && 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
                && yaml_emitter_write_indent(emitter).fail
            {
                return FAIL;
            }
        }
        (*emitter).state = YamlEmitDocumentContentState;
        (*emitter).open_ended = 0;
        return OK;
    } else if (*event).type_ == YamlStreamEndEvent {
        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 = YamlEmitEndState;
        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 YamlEmitterT,
    event: *mut YamlEventT,
) -> Success {
    PUSH!((*emitter).states, YamlEmitDocumentEndState);
    yaml_emitter_emit_node(emitter, event, true, false, false, false)
}

unsafe fn yaml_emitter_emit_document_end(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
) -> Success {
    if (*event).type_ == YamlDocumentEndEvent {
        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 = YamlEmitDocumentStartState;
        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 YamlEmitterT,
    event: *mut YamlEventT,
    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_ == YamlSequenceEndEvent {
        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
        && 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)
        && yaml_emitter_write_indent(emitter).fail
    {
        return FAIL;
    }
    PUSH!((*emitter).states, YamlEmitFlowSequenceItemState);
    yaml_emitter_emit_node(emitter, event, false, true, false, false)
}

unsafe fn yaml_emitter_emit_flow_mapping_key(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    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_ == YamlMappingEndEvent {
        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
        && 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)
        && yaml_emitter_write_indent(emitter).fail
    {
        return FAIL;
    }
    if !(*emitter).canonical && yaml_emitter_check_simple_key(emitter) {
        PUSH!((*emitter).states, YamlEmitFlowMappingSimpleValueState);
        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, YamlEmitFlowMappingValueState);
        yaml_emitter_emit_node(
            emitter, event, false, false, true, false,
        )
    }
}

unsafe fn yaml_emitter_emit_flow_mapping_value(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    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)
            && 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, YamlEmitFlowMappingKeyState);
    yaml_emitter_emit_node(emitter, event, false, false, true, false)
}

unsafe fn yaml_emitter_emit_block_sequence_item(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    first: bool,
) -> Success {
    if first {
        yaml_emitter_increase_indent(
            emitter,
            false,
            (*emitter).mapping_context && !(*emitter).indention,
        );
    }
    if (*event).type_ == YamlSequenceEndEvent {
        (*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, YamlEmitBlockSequenceItemState);
    yaml_emitter_emit_node(emitter, event, false, true, false, false)
}

unsafe fn yaml_emitter_emit_block_mapping_key(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    first: bool,
) -> Success {
    if first {
        yaml_emitter_increase_indent(emitter, false, false);
    }
    if (*event).type_ == YamlMappingEndEvent {
        (*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, YamlEmitBlockMappingSimpleValueState);
        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, YamlEmitBlockMappingValueState);
        yaml_emitter_emit_node(
            emitter, event, false, false, true, false,
        )
    }
}

unsafe fn yaml_emitter_emit_block_mapping_value(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    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, YamlEmitBlockMappingKeyState);
    yaml_emitter_emit_node(emitter, event, false, false, true, false)
}

unsafe fn yaml_emitter_emit_node(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
    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_ {
        YamlAliasEvent => yaml_emitter_emit_alias(emitter, event),
        YamlScalarEvent => yaml_emitter_emit_scalar(emitter, event),
        YamlSequenceStartEvent => yaml_emitter_emit_sequence_start(emitter, event),
        YamlMappingStartEvent => 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 YamlEmitterT,
    _event: *mut YamlEventT,
) -> Success {
    if yaml_emitter_process_anchor(emitter).fail {
        return FAIL;
    }
    if (*emitter).simple_key_context && put(emitter, b' ').fail {
        return FAIL;
    }
    (*emitter).state = POP!((*emitter).states);
    OK
}

unsafe fn yaml_emitter_emit_scalar(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
) -> 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 YamlEmitterT,
    event: *mut YamlEventT,
) -> 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 == YamlFlowSequenceStyle
        || yaml_emitter_check_empty_sequence(emitter)
    {
        (*emitter).state = YamlEmitFlowSequenceFirstItemState;
    } else {
        (*emitter).state = YamlEmitBlockSequenceFirstItemState;
    }
    OK
}

unsafe fn yaml_emitter_emit_mapping_start(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
) -> 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 == YamlFlowMappingStyle
        || yaml_emitter_check_empty_mapping(emitter)
    {
        (*emitter).state = YamlEmitFlowMappingFirstKeyState;
    } else {
        (*emitter).state = YamlEmitBlockMappingFirstKeyState;
    }
    OK
}

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

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

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

unsafe fn yaml_emitter_check_simple_key(
    emitter: *mut YamlEmitterT,
) -> bool {
    let event: *mut YamlEventT = (*emitter).events.head;
    let mut length: size_t = 0_u64;
    match (*event).type_ {
        YamlAliasEvent => {
            length =
                length.force_add((*emitter).anchor_data.anchor_length);
        }
        YamlScalarEvent => {
            if (*emitter).scalar_data.multiline {
                return false;
            }
            length = length
                .force_add((*emitter).anchor_data.anchor_length)
                .force_add((*emitter).tag_data.handle_length)
                .force_add((*emitter).tag_data.suffix_length)
                .force_add((*emitter).scalar_data.length);
        }
        YamlSequenceStartEvent => {
            if !yaml_emitter_check_empty_sequence(emitter) {
                return false;
            }
            length = length
                .force_add((*emitter).anchor_data.anchor_length)
                .force_add((*emitter).tag_data.handle_length)
                .force_add((*emitter).tag_data.suffix_length);
        }
        YamlMappingStartEvent => {
            if !yaml_emitter_check_empty_mapping(emitter) {
                return false;
            }
            length = length
                .force_add((*emitter).anchor_data.anchor_length)
                .force_add((*emitter).tag_data.handle_length)
                .force_add((*emitter).tag_data.suffix_length);
        }
        _ => return false,
    }
    if length > 128_u64 {
        return false;
    }
    true
}

unsafe fn yaml_emitter_select_scalar_style(
    emitter: *mut YamlEmitterT,
    event: *mut YamlEventT,
) -> Success {
    let mut style: YamlScalarStyleT = (*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 == YamlAnyScalarStyle {
        style = YamlPlainScalarStyle;
    }
    if (*emitter).canonical {
        style = YamlDoubleQuotedScalarStyle;
    }
    if (*emitter).simple_key_context && (*emitter).scalar_data.multiline
    {
        style = YamlDoubleQuotedScalarStyle;
    }
    if style == YamlPlainScalarStyle {
        if (*emitter).flow_level != 0
            && !(*emitter).scalar_data.flow_plain_allowed
            || (*emitter).flow_level == 0
                && !(*emitter).scalar_data.block_plain_allowed
        {
            style = YamlSingleQuotedScalarStyle;
        }
        if (*emitter).scalar_data.length == 0
            && ((*emitter).flow_level != 0
                || (*emitter).simple_key_context)
        {
            style = YamlSingleQuotedScalarStyle;
        }
        if no_tag && !(*event).data.scalar.plain_implicit {
            style = YamlSingleQuotedScalarStyle;
        }
    }
    if style == YamlSingleQuotedScalarStyle
        && !(*emitter).scalar_data.single_quoted_allowed
    {
        style = YamlDoubleQuotedScalarStyle;
    }
    if (style == YamlLiteralScalarStyle
        || style == YamlFoldedScalarStyle)
        && (!(*emitter).scalar_data.block_allowed
            || (*emitter).flow_level != 0
            || (*emitter).simple_key_context)
    {
        style = YamlDoubleQuotedScalarStyle;
    }
    if no_tag
        && !(*event).data.scalar.quoted_implicit
        && style != YamlPlainScalarStyle
    {
        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 YamlEmitterT,
) -> 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 YamlEmitterT,
) -> 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()
            && 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 YamlEmitterT,
) -> Success {
    match (*emitter).scalar_data.style {
        YamlPlainScalarStyle => {
            return yaml_emitter_write_plain_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YamlSingleQuotedScalarStyle => {
            return yaml_emitter_write_single_quoted_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YamlDoubleQuotedScalarStyle => {
            return yaml_emitter_write_double_quoted_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
                !(*emitter).simple_key_context,
            );
        }
        YamlLiteralScalarStyle => {
            return yaml_emitter_write_literal_scalar(
                emitter,
                (*emitter).scalar_data.value,
                (*emitter).scalar_data.length,
            );
        }
        YamlFoldedScalarStyle => {
            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 YamlEmitterT,
    version_directive: YamlVersionDirectiveT,
) -> 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 YamlEmitterT,
    tag_directive: YamlTagDirectiveT,
) -> 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 YamlEmitterT,
    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 size_t;
    (*emitter).anchor_data.alias = alias;
    OK
}

unsafe fn yaml_emitter_analyze_tag(
    emitter: *mut YamlEmitterT,
    tag: *mut yaml_char_t,
) -> Success {
    let mut tag_directive: *mut YamlTagDirectiveT;
    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 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_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 size_t;
    OK
}

unsafe fn yaml_emitter_analyze_scalar(
    emitter: *mut YamlEmitterT,
    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 YamlEmitterT,
    event: *mut YamlEventT,
) -> 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_ {
        YamlAliasEvent => yaml_emitter_analyze_anchor(
            emitter,
            (*event).data.alias.anchor,
            true,
        ),
        YamlScalarEvent => {
            if !(*event).data.scalar.anchor.is_null()
                && 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)
                && 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,
            )
        }
        YamlSequenceStartEvent => {
            if !(*event).data.sequence_start.anchor.is_null()
                && 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)
                && yaml_emitter_analyze_tag(
                    emitter,
                    (*event).data.sequence_start.tag,
                )
                .fail
            {
                return FAIL;
            }
            OK
        }
        YamlMappingStartEvent => {
            if !(*event).data.mapping_start.anchor.is_null()
                && 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)
                && yaml_emitter_analyze_tag(
                    emitter,
                    (*event).data.mapping_start.tag,
                )
                .fail
            {
                return FAIL;
            }
            OK
        }
        _ => OK,
    }
}

unsafe fn yaml_emitter_write_bom(
    emitter: *mut YamlEmitterT,
) -> 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 YamlEmitterT,
) -> 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)
        && put_break(emitter).fail
    {
        return FAIL;
    }
    if (*emitter).column < indent {
        loop {
            if put(emitter, b' ').fail {
                return FAIL;
            }
            if (*emitter).column >= indent {
                break;
            }
        }
    }
    (*emitter).whitespace = true;
    (*emitter).indention = true;
    OK
}

unsafe fn yaml_emitter_write_indicator(
    emitter: *mut YamlEmitterT,
    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
        && 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 YamlEmitterT,
    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 YamlEmitterT,
    value: *mut yaml_char_t,
    length: size_t,
) -> Success {
    let mut string = STRING_ASSIGN!(value, length);
    if !(*emitter).whitespace && 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 YamlEmitterT,
    value: *mut yaml_char_t,
    length: size_t,
    need_whitespace: bool,
) -> Success {
    let mut string = STRING_ASSIGN!(value, length);
    if need_whitespace
        && !(*emitter).whitespace
        && 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).force_add(if (value >> 4) < 10 {
                        b'0'
                    } else {
                        b'A' - 10
                    }),
                )
                .fail
                {
                    return FAIL;
                }
                if put(
                    emitter,
                    (value & 0x0F).force_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 YamlEmitterT,
    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)
        && 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')
                && put_break(emitter).fail
            {
                return FAIL;
            }
            if write_break!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks && 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 YamlEmitterT,
    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')
                && put_break(emitter).fail
            {
                return FAIL;
            }
            if write_break!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = true;
            breaks = true;
        } else {
            if breaks && yaml_emitter_write_indent(emitter).fail {
                return FAIL;
            }
            if CHECK!(string, b'\'') && put(emitter, b'\'').fail {
                return FAIL;
            }
            if write!(emitter, string).fail {
                return FAIL;
            }
            (*emitter).indention = false;
            spaces = false;
            breaks = false;
        }
    }
    if breaks && 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 YamlEmitterT,
    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)
                    .force_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) && 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 YamlEmitterT,
    mut string: YamlStringT,
) -> 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()
        && yaml_emitter_write_indicator(
            emitter, chomp_hint, false, false, false,
        )
        .fail
    {
        return FAIL;
    }
    OK
}

unsafe fn yaml_emitter_write_literal_scalar(
    emitter: *mut YamlEmitterT,
    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 && 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 YamlEmitterT,
    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 as isize)
                    && 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
}