Matteo Scandolo | a428586 | 2020-12-01 18:10:10 -0800 | [diff] [blame^] | 1 | package yaml |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "fmt" |
| 6 | ) |
| 7 | |
| 8 | // Flush the buffer if needed. |
| 9 | func flush(emitter *yaml_emitter_t) bool { |
| 10 | if emitter.buffer_pos+5 >= len(emitter.buffer) { |
| 11 | return yaml_emitter_flush(emitter) |
| 12 | } |
| 13 | return true |
| 14 | } |
| 15 | |
| 16 | // Put a character to the output buffer. |
| 17 | func put(emitter *yaml_emitter_t, value byte) bool { |
| 18 | if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| 19 | return false |
| 20 | } |
| 21 | emitter.buffer[emitter.buffer_pos] = value |
| 22 | emitter.buffer_pos++ |
| 23 | emitter.column++ |
| 24 | return true |
| 25 | } |
| 26 | |
| 27 | // Put a line break to the output buffer. |
| 28 | func put_break(emitter *yaml_emitter_t) bool { |
| 29 | if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| 30 | return false |
| 31 | } |
| 32 | switch emitter.line_break { |
| 33 | case yaml_CR_BREAK: |
| 34 | emitter.buffer[emitter.buffer_pos] = '\r' |
| 35 | emitter.buffer_pos += 1 |
| 36 | case yaml_LN_BREAK: |
| 37 | emitter.buffer[emitter.buffer_pos] = '\n' |
| 38 | emitter.buffer_pos += 1 |
| 39 | case yaml_CRLN_BREAK: |
| 40 | emitter.buffer[emitter.buffer_pos+0] = '\r' |
| 41 | emitter.buffer[emitter.buffer_pos+1] = '\n' |
| 42 | emitter.buffer_pos += 2 |
| 43 | default: |
| 44 | panic("unknown line break setting") |
| 45 | } |
| 46 | emitter.column = 0 |
| 47 | emitter.line++ |
| 48 | return true |
| 49 | } |
| 50 | |
| 51 | // Copy a character from a string into buffer. |
| 52 | func write(emitter *yaml_emitter_t, s []byte, i *int) bool { |
| 53 | if emitter.buffer_pos+5 >= len(emitter.buffer) && !yaml_emitter_flush(emitter) { |
| 54 | return false |
| 55 | } |
| 56 | p := emitter.buffer_pos |
| 57 | w := width(s[*i]) |
| 58 | switch w { |
| 59 | case 4: |
| 60 | emitter.buffer[p+3] = s[*i+3] |
| 61 | fallthrough |
| 62 | case 3: |
| 63 | emitter.buffer[p+2] = s[*i+2] |
| 64 | fallthrough |
| 65 | case 2: |
| 66 | emitter.buffer[p+1] = s[*i+1] |
| 67 | fallthrough |
| 68 | case 1: |
| 69 | emitter.buffer[p+0] = s[*i+0] |
| 70 | default: |
| 71 | panic("unknown character width") |
| 72 | } |
| 73 | emitter.column++ |
| 74 | emitter.buffer_pos += w |
| 75 | *i += w |
| 76 | return true |
| 77 | } |
| 78 | |
| 79 | // Write a whole string into buffer. |
| 80 | func write_all(emitter *yaml_emitter_t, s []byte) bool { |
| 81 | for i := 0; i < len(s); { |
| 82 | if !write(emitter, s, &i) { |
| 83 | return false |
| 84 | } |
| 85 | } |
| 86 | return true |
| 87 | } |
| 88 | |
| 89 | // Copy a line break character from a string into buffer. |
| 90 | func write_break(emitter *yaml_emitter_t, s []byte, i *int) bool { |
| 91 | if s[*i] == '\n' { |
| 92 | if !put_break(emitter) { |
| 93 | return false |
| 94 | } |
| 95 | *i++ |
| 96 | } else { |
| 97 | if !write(emitter, s, i) { |
| 98 | return false |
| 99 | } |
| 100 | emitter.column = 0 |
| 101 | emitter.line++ |
| 102 | } |
| 103 | return true |
| 104 | } |
| 105 | |
| 106 | // Set an emitter error and return false. |
| 107 | func yaml_emitter_set_emitter_error(emitter *yaml_emitter_t, problem string) bool { |
| 108 | emitter.error = yaml_EMITTER_ERROR |
| 109 | emitter.problem = problem |
| 110 | return false |
| 111 | } |
| 112 | |
| 113 | // Emit an event. |
| 114 | func yaml_emitter_emit(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 115 | emitter.events = append(emitter.events, *event) |
| 116 | for !yaml_emitter_need_more_events(emitter) { |
| 117 | event := &emitter.events[emitter.events_head] |
| 118 | if !yaml_emitter_analyze_event(emitter, event) { |
| 119 | return false |
| 120 | } |
| 121 | if !yaml_emitter_state_machine(emitter, event) { |
| 122 | return false |
| 123 | } |
| 124 | yaml_event_delete(event) |
| 125 | emitter.events_head++ |
| 126 | } |
| 127 | return true |
| 128 | } |
| 129 | |
| 130 | // Check if we need to accumulate more events before emitting. |
| 131 | // |
| 132 | // We accumulate extra |
| 133 | // - 1 event for DOCUMENT-START |
| 134 | // - 2 events for SEQUENCE-START |
| 135 | // - 3 events for MAPPING-START |
| 136 | // |
| 137 | func yaml_emitter_need_more_events(emitter *yaml_emitter_t) bool { |
| 138 | if emitter.events_head == len(emitter.events) { |
| 139 | return true |
| 140 | } |
| 141 | var accumulate int |
| 142 | switch emitter.events[emitter.events_head].typ { |
| 143 | case yaml_DOCUMENT_START_EVENT: |
| 144 | accumulate = 1 |
| 145 | break |
| 146 | case yaml_SEQUENCE_START_EVENT: |
| 147 | accumulate = 2 |
| 148 | break |
| 149 | case yaml_MAPPING_START_EVENT: |
| 150 | accumulate = 3 |
| 151 | break |
| 152 | default: |
| 153 | return false |
| 154 | } |
| 155 | if len(emitter.events)-emitter.events_head > accumulate { |
| 156 | return false |
| 157 | } |
| 158 | var level int |
| 159 | for i := emitter.events_head; i < len(emitter.events); i++ { |
| 160 | switch emitter.events[i].typ { |
| 161 | case yaml_STREAM_START_EVENT, yaml_DOCUMENT_START_EVENT, yaml_SEQUENCE_START_EVENT, yaml_MAPPING_START_EVENT: |
| 162 | level++ |
| 163 | case yaml_STREAM_END_EVENT, yaml_DOCUMENT_END_EVENT, yaml_SEQUENCE_END_EVENT, yaml_MAPPING_END_EVENT: |
| 164 | level-- |
| 165 | } |
| 166 | if level == 0 { |
| 167 | return false |
| 168 | } |
| 169 | } |
| 170 | return true |
| 171 | } |
| 172 | |
| 173 | // Append a directive to the directives stack. |
| 174 | func yaml_emitter_append_tag_directive(emitter *yaml_emitter_t, value *yaml_tag_directive_t, allow_duplicates bool) bool { |
| 175 | for i := 0; i < len(emitter.tag_directives); i++ { |
| 176 | if bytes.Equal(value.handle, emitter.tag_directives[i].handle) { |
| 177 | if allow_duplicates { |
| 178 | return true |
| 179 | } |
| 180 | return yaml_emitter_set_emitter_error(emitter, "duplicate %TAG directive") |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | // [Go] Do we actually need to copy this given garbage collection |
| 185 | // and the lack of deallocating destructors? |
| 186 | tag_copy := yaml_tag_directive_t{ |
| 187 | handle: make([]byte, len(value.handle)), |
| 188 | prefix: make([]byte, len(value.prefix)), |
| 189 | } |
| 190 | copy(tag_copy.handle, value.handle) |
| 191 | copy(tag_copy.prefix, value.prefix) |
| 192 | emitter.tag_directives = append(emitter.tag_directives, tag_copy) |
| 193 | return true |
| 194 | } |
| 195 | |
| 196 | // Increase the indentation level. |
| 197 | func yaml_emitter_increase_indent(emitter *yaml_emitter_t, flow, indentless bool) bool { |
| 198 | emitter.indents = append(emitter.indents, emitter.indent) |
| 199 | if emitter.indent < 0 { |
| 200 | if flow { |
| 201 | emitter.indent = emitter.best_indent |
| 202 | } else { |
| 203 | emitter.indent = 0 |
| 204 | } |
| 205 | } else if !indentless { |
| 206 | emitter.indent += emitter.best_indent |
| 207 | } |
| 208 | return true |
| 209 | } |
| 210 | |
| 211 | // State dispatcher. |
| 212 | func yaml_emitter_state_machine(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 213 | switch emitter.state { |
| 214 | default: |
| 215 | case yaml_EMIT_STREAM_START_STATE: |
| 216 | return yaml_emitter_emit_stream_start(emitter, event) |
| 217 | |
| 218 | case yaml_EMIT_FIRST_DOCUMENT_START_STATE: |
| 219 | return yaml_emitter_emit_document_start(emitter, event, true) |
| 220 | |
| 221 | case yaml_EMIT_DOCUMENT_START_STATE: |
| 222 | return yaml_emitter_emit_document_start(emitter, event, false) |
| 223 | |
| 224 | case yaml_EMIT_DOCUMENT_CONTENT_STATE: |
| 225 | return yaml_emitter_emit_document_content(emitter, event) |
| 226 | |
| 227 | case yaml_EMIT_DOCUMENT_END_STATE: |
| 228 | return yaml_emitter_emit_document_end(emitter, event) |
| 229 | |
| 230 | case yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE: |
| 231 | return yaml_emitter_emit_flow_sequence_item(emitter, event, true) |
| 232 | |
| 233 | case yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE: |
| 234 | return yaml_emitter_emit_flow_sequence_item(emitter, event, false) |
| 235 | |
| 236 | case yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE: |
| 237 | return yaml_emitter_emit_flow_mapping_key(emitter, event, true) |
| 238 | |
| 239 | case yaml_EMIT_FLOW_MAPPING_KEY_STATE: |
| 240 | return yaml_emitter_emit_flow_mapping_key(emitter, event, false) |
| 241 | |
| 242 | case yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE: |
| 243 | return yaml_emitter_emit_flow_mapping_value(emitter, event, true) |
| 244 | |
| 245 | case yaml_EMIT_FLOW_MAPPING_VALUE_STATE: |
| 246 | return yaml_emitter_emit_flow_mapping_value(emitter, event, false) |
| 247 | |
| 248 | case yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE: |
| 249 | return yaml_emitter_emit_block_sequence_item(emitter, event, true) |
| 250 | |
| 251 | case yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE: |
| 252 | return yaml_emitter_emit_block_sequence_item(emitter, event, false) |
| 253 | |
| 254 | case yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE: |
| 255 | return yaml_emitter_emit_block_mapping_key(emitter, event, true) |
| 256 | |
| 257 | case yaml_EMIT_BLOCK_MAPPING_KEY_STATE: |
| 258 | return yaml_emitter_emit_block_mapping_key(emitter, event, false) |
| 259 | |
| 260 | case yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE: |
| 261 | return yaml_emitter_emit_block_mapping_value(emitter, event, true) |
| 262 | |
| 263 | case yaml_EMIT_BLOCK_MAPPING_VALUE_STATE: |
| 264 | return yaml_emitter_emit_block_mapping_value(emitter, event, false) |
| 265 | |
| 266 | case yaml_EMIT_END_STATE: |
| 267 | return yaml_emitter_set_emitter_error(emitter, "expected nothing after STREAM-END") |
| 268 | } |
| 269 | panic("invalid emitter state") |
| 270 | } |
| 271 | |
| 272 | // Expect STREAM-START. |
| 273 | func yaml_emitter_emit_stream_start(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 274 | if event.typ != yaml_STREAM_START_EVENT { |
| 275 | return yaml_emitter_set_emitter_error(emitter, "expected STREAM-START") |
| 276 | } |
| 277 | if emitter.encoding == yaml_ANY_ENCODING { |
| 278 | emitter.encoding = event.encoding |
| 279 | if emitter.encoding == yaml_ANY_ENCODING { |
| 280 | emitter.encoding = yaml_UTF8_ENCODING |
| 281 | } |
| 282 | } |
| 283 | if emitter.best_indent < 2 || emitter.best_indent > 9 { |
| 284 | emitter.best_indent = 2 |
| 285 | } |
| 286 | if emitter.best_width >= 0 && emitter.best_width <= emitter.best_indent*2 { |
| 287 | emitter.best_width = 80 |
| 288 | } |
| 289 | if emitter.best_width < 0 { |
| 290 | emitter.best_width = 1<<31 - 1 |
| 291 | } |
| 292 | if emitter.line_break == yaml_ANY_BREAK { |
| 293 | emitter.line_break = yaml_LN_BREAK |
| 294 | } |
| 295 | |
| 296 | emitter.indent = -1 |
| 297 | emitter.line = 0 |
| 298 | emitter.column = 0 |
| 299 | emitter.whitespace = true |
| 300 | emitter.indention = true |
| 301 | |
| 302 | if emitter.encoding != yaml_UTF8_ENCODING { |
| 303 | if !yaml_emitter_write_bom(emitter) { |
| 304 | return false |
| 305 | } |
| 306 | } |
| 307 | emitter.state = yaml_EMIT_FIRST_DOCUMENT_START_STATE |
| 308 | return true |
| 309 | } |
| 310 | |
| 311 | // Expect DOCUMENT-START or STREAM-END. |
| 312 | func yaml_emitter_emit_document_start(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| 313 | |
| 314 | if event.typ == yaml_DOCUMENT_START_EVENT { |
| 315 | |
| 316 | if event.version_directive != nil { |
| 317 | if !yaml_emitter_analyze_version_directive(emitter, event.version_directive) { |
| 318 | return false |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | for i := 0; i < len(event.tag_directives); i++ { |
| 323 | tag_directive := &event.tag_directives[i] |
| 324 | if !yaml_emitter_analyze_tag_directive(emitter, tag_directive) { |
| 325 | return false |
| 326 | } |
| 327 | if !yaml_emitter_append_tag_directive(emitter, tag_directive, false) { |
| 328 | return false |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | for i := 0; i < len(default_tag_directives); i++ { |
| 333 | tag_directive := &default_tag_directives[i] |
| 334 | if !yaml_emitter_append_tag_directive(emitter, tag_directive, true) { |
| 335 | return false |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | implicit := event.implicit |
| 340 | if !first || emitter.canonical { |
| 341 | implicit = false |
| 342 | } |
| 343 | |
| 344 | if emitter.open_ended && (event.version_directive != nil || len(event.tag_directives) > 0) { |
| 345 | if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| 346 | return false |
| 347 | } |
| 348 | if !yaml_emitter_write_indent(emitter) { |
| 349 | return false |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | if event.version_directive != nil { |
| 354 | implicit = false |
| 355 | if !yaml_emitter_write_indicator(emitter, []byte("%YAML"), true, false, false) { |
| 356 | return false |
| 357 | } |
| 358 | if !yaml_emitter_write_indicator(emitter, []byte("1.1"), true, false, false) { |
| 359 | return false |
| 360 | } |
| 361 | if !yaml_emitter_write_indent(emitter) { |
| 362 | return false |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | if len(event.tag_directives) > 0 { |
| 367 | implicit = false |
| 368 | for i := 0; i < len(event.tag_directives); i++ { |
| 369 | tag_directive := &event.tag_directives[i] |
| 370 | if !yaml_emitter_write_indicator(emitter, []byte("%TAG"), true, false, false) { |
| 371 | return false |
| 372 | } |
| 373 | if !yaml_emitter_write_tag_handle(emitter, tag_directive.handle) { |
| 374 | return false |
| 375 | } |
| 376 | if !yaml_emitter_write_tag_content(emitter, tag_directive.prefix, true) { |
| 377 | return false |
| 378 | } |
| 379 | if !yaml_emitter_write_indent(emitter) { |
| 380 | return false |
| 381 | } |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | if yaml_emitter_check_empty_document(emitter) { |
| 386 | implicit = false |
| 387 | } |
| 388 | if !implicit { |
| 389 | if !yaml_emitter_write_indent(emitter) { |
| 390 | return false |
| 391 | } |
| 392 | if !yaml_emitter_write_indicator(emitter, []byte("---"), true, false, false) { |
| 393 | return false |
| 394 | } |
| 395 | if emitter.canonical { |
| 396 | if !yaml_emitter_write_indent(emitter) { |
| 397 | return false |
| 398 | } |
| 399 | } |
| 400 | } |
| 401 | |
| 402 | emitter.state = yaml_EMIT_DOCUMENT_CONTENT_STATE |
| 403 | return true |
| 404 | } |
| 405 | |
| 406 | if event.typ == yaml_STREAM_END_EVENT { |
| 407 | if emitter.open_ended { |
| 408 | if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| 409 | return false |
| 410 | } |
| 411 | if !yaml_emitter_write_indent(emitter) { |
| 412 | return false |
| 413 | } |
| 414 | } |
| 415 | if !yaml_emitter_flush(emitter) { |
| 416 | return false |
| 417 | } |
| 418 | emitter.state = yaml_EMIT_END_STATE |
| 419 | return true |
| 420 | } |
| 421 | |
| 422 | return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-START or STREAM-END") |
| 423 | } |
| 424 | |
| 425 | // Expect the root node. |
| 426 | func yaml_emitter_emit_document_content(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 427 | emitter.states = append(emitter.states, yaml_EMIT_DOCUMENT_END_STATE) |
| 428 | return yaml_emitter_emit_node(emitter, event, true, false, false, false) |
| 429 | } |
| 430 | |
| 431 | // Expect DOCUMENT-END. |
| 432 | func yaml_emitter_emit_document_end(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 433 | if event.typ != yaml_DOCUMENT_END_EVENT { |
| 434 | return yaml_emitter_set_emitter_error(emitter, "expected DOCUMENT-END") |
| 435 | } |
| 436 | if !yaml_emitter_write_indent(emitter) { |
| 437 | return false |
| 438 | } |
| 439 | if !event.implicit { |
| 440 | // [Go] Allocate the slice elsewhere. |
| 441 | if !yaml_emitter_write_indicator(emitter, []byte("..."), true, false, false) { |
| 442 | return false |
| 443 | } |
| 444 | if !yaml_emitter_write_indent(emitter) { |
| 445 | return false |
| 446 | } |
| 447 | } |
| 448 | if !yaml_emitter_flush(emitter) { |
| 449 | return false |
| 450 | } |
| 451 | emitter.state = yaml_EMIT_DOCUMENT_START_STATE |
| 452 | emitter.tag_directives = emitter.tag_directives[:0] |
| 453 | return true |
| 454 | } |
| 455 | |
| 456 | // Expect a flow item node. |
| 457 | func yaml_emitter_emit_flow_sequence_item(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| 458 | if first { |
| 459 | if !yaml_emitter_write_indicator(emitter, []byte{'['}, true, true, false) { |
| 460 | return false |
| 461 | } |
| 462 | if !yaml_emitter_increase_indent(emitter, true, false) { |
| 463 | return false |
| 464 | } |
| 465 | emitter.flow_level++ |
| 466 | } |
| 467 | |
| 468 | if event.typ == yaml_SEQUENCE_END_EVENT { |
| 469 | emitter.flow_level-- |
| 470 | emitter.indent = emitter.indents[len(emitter.indents)-1] |
| 471 | emitter.indents = emitter.indents[:len(emitter.indents)-1] |
| 472 | if emitter.canonical && !first { |
| 473 | if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| 474 | return false |
| 475 | } |
| 476 | if !yaml_emitter_write_indent(emitter) { |
| 477 | return false |
| 478 | } |
| 479 | } |
| 480 | if !yaml_emitter_write_indicator(emitter, []byte{']'}, false, false, false) { |
| 481 | return false |
| 482 | } |
| 483 | emitter.state = emitter.states[len(emitter.states)-1] |
| 484 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 485 | |
| 486 | return true |
| 487 | } |
| 488 | |
| 489 | if !first { |
| 490 | if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| 491 | return false |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | if emitter.canonical || emitter.column > emitter.best_width { |
| 496 | if !yaml_emitter_write_indent(emitter) { |
| 497 | return false |
| 498 | } |
| 499 | } |
| 500 | emitter.states = append(emitter.states, yaml_EMIT_FLOW_SEQUENCE_ITEM_STATE) |
| 501 | return yaml_emitter_emit_node(emitter, event, false, true, false, false) |
| 502 | } |
| 503 | |
| 504 | // Expect a flow key node. |
| 505 | func yaml_emitter_emit_flow_mapping_key(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| 506 | if first { |
| 507 | if !yaml_emitter_write_indicator(emitter, []byte{'{'}, true, true, false) { |
| 508 | return false |
| 509 | } |
| 510 | if !yaml_emitter_increase_indent(emitter, true, false) { |
| 511 | return false |
| 512 | } |
| 513 | emitter.flow_level++ |
| 514 | } |
| 515 | |
| 516 | if event.typ == yaml_MAPPING_END_EVENT { |
| 517 | emitter.flow_level-- |
| 518 | emitter.indent = emitter.indents[len(emitter.indents)-1] |
| 519 | emitter.indents = emitter.indents[:len(emitter.indents)-1] |
| 520 | if emitter.canonical && !first { |
| 521 | if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| 522 | return false |
| 523 | } |
| 524 | if !yaml_emitter_write_indent(emitter) { |
| 525 | return false |
| 526 | } |
| 527 | } |
| 528 | if !yaml_emitter_write_indicator(emitter, []byte{'}'}, false, false, false) { |
| 529 | return false |
| 530 | } |
| 531 | emitter.state = emitter.states[len(emitter.states)-1] |
| 532 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 533 | return true |
| 534 | } |
| 535 | |
| 536 | if !first { |
| 537 | if !yaml_emitter_write_indicator(emitter, []byte{','}, false, false, false) { |
| 538 | return false |
| 539 | } |
| 540 | } |
| 541 | if emitter.canonical || emitter.column > emitter.best_width { |
| 542 | if !yaml_emitter_write_indent(emitter) { |
| 543 | return false |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | if !emitter.canonical && yaml_emitter_check_simple_key(emitter) { |
| 548 | emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE) |
| 549 | return yaml_emitter_emit_node(emitter, event, false, false, true, true) |
| 550 | } |
| 551 | if !yaml_emitter_write_indicator(emitter, []byte{'?'}, true, false, false) { |
| 552 | return false |
| 553 | } |
| 554 | emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_VALUE_STATE) |
| 555 | return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| 556 | } |
| 557 | |
| 558 | // Expect a flow value node. |
| 559 | func yaml_emitter_emit_flow_mapping_value(emitter *yaml_emitter_t, event *yaml_event_t, simple bool) bool { |
| 560 | if simple { |
| 561 | if !yaml_emitter_write_indicator(emitter, []byte{':'}, false, false, false) { |
| 562 | return false |
| 563 | } |
| 564 | } else { |
| 565 | if emitter.canonical || emitter.column > emitter.best_width { |
| 566 | if !yaml_emitter_write_indent(emitter) { |
| 567 | return false |
| 568 | } |
| 569 | } |
| 570 | if !yaml_emitter_write_indicator(emitter, []byte{':'}, true, false, false) { |
| 571 | return false |
| 572 | } |
| 573 | } |
| 574 | emitter.states = append(emitter.states, yaml_EMIT_FLOW_MAPPING_KEY_STATE) |
| 575 | return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| 576 | } |
| 577 | |
| 578 | // Expect a block item node. |
| 579 | func yaml_emitter_emit_block_sequence_item(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| 580 | if first { |
| 581 | if !yaml_emitter_increase_indent(emitter, false, emitter.mapping_context && !emitter.indention) { |
| 582 | return false |
| 583 | } |
| 584 | } |
| 585 | if event.typ == yaml_SEQUENCE_END_EVENT { |
| 586 | emitter.indent = emitter.indents[len(emitter.indents)-1] |
| 587 | emitter.indents = emitter.indents[:len(emitter.indents)-1] |
| 588 | emitter.state = emitter.states[len(emitter.states)-1] |
| 589 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 590 | return true |
| 591 | } |
| 592 | if !yaml_emitter_write_indent(emitter) { |
| 593 | return false |
| 594 | } |
| 595 | if !yaml_emitter_write_indicator(emitter, []byte{'-'}, true, false, true) { |
| 596 | return false |
| 597 | } |
| 598 | emitter.states = append(emitter.states, yaml_EMIT_BLOCK_SEQUENCE_ITEM_STATE) |
| 599 | return yaml_emitter_emit_node(emitter, event, false, true, false, false) |
| 600 | } |
| 601 | |
| 602 | // Expect a block key node. |
| 603 | func yaml_emitter_emit_block_mapping_key(emitter *yaml_emitter_t, event *yaml_event_t, first bool) bool { |
| 604 | if first { |
| 605 | if !yaml_emitter_increase_indent(emitter, false, false) { |
| 606 | return false |
| 607 | } |
| 608 | } |
| 609 | if event.typ == yaml_MAPPING_END_EVENT { |
| 610 | emitter.indent = emitter.indents[len(emitter.indents)-1] |
| 611 | emitter.indents = emitter.indents[:len(emitter.indents)-1] |
| 612 | emitter.state = emitter.states[len(emitter.states)-1] |
| 613 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 614 | return true |
| 615 | } |
| 616 | if !yaml_emitter_write_indent(emitter) { |
| 617 | return false |
| 618 | } |
| 619 | if yaml_emitter_check_simple_key(emitter) { |
| 620 | emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE) |
| 621 | return yaml_emitter_emit_node(emitter, event, false, false, true, true) |
| 622 | } |
| 623 | if !yaml_emitter_write_indicator(emitter, []byte{'?'}, true, false, true) { |
| 624 | return false |
| 625 | } |
| 626 | emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_VALUE_STATE) |
| 627 | return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| 628 | } |
| 629 | |
| 630 | // Expect a block value node. |
| 631 | func yaml_emitter_emit_block_mapping_value(emitter *yaml_emitter_t, event *yaml_event_t, simple bool) bool { |
| 632 | if simple { |
| 633 | if !yaml_emitter_write_indicator(emitter, []byte{':'}, false, false, false) { |
| 634 | return false |
| 635 | } |
| 636 | } else { |
| 637 | if !yaml_emitter_write_indent(emitter) { |
| 638 | return false |
| 639 | } |
| 640 | if !yaml_emitter_write_indicator(emitter, []byte{':'}, true, false, true) { |
| 641 | return false |
| 642 | } |
| 643 | } |
| 644 | emitter.states = append(emitter.states, yaml_EMIT_BLOCK_MAPPING_KEY_STATE) |
| 645 | return yaml_emitter_emit_node(emitter, event, false, false, true, false) |
| 646 | } |
| 647 | |
| 648 | // Expect a node. |
| 649 | func yaml_emitter_emit_node(emitter *yaml_emitter_t, event *yaml_event_t, |
| 650 | root bool, sequence bool, mapping bool, simple_key bool) bool { |
| 651 | |
| 652 | emitter.root_context = root |
| 653 | emitter.sequence_context = sequence |
| 654 | emitter.mapping_context = mapping |
| 655 | emitter.simple_key_context = simple_key |
| 656 | |
| 657 | switch event.typ { |
| 658 | case yaml_ALIAS_EVENT: |
| 659 | return yaml_emitter_emit_alias(emitter, event) |
| 660 | case yaml_SCALAR_EVENT: |
| 661 | return yaml_emitter_emit_scalar(emitter, event) |
| 662 | case yaml_SEQUENCE_START_EVENT: |
| 663 | return yaml_emitter_emit_sequence_start(emitter, event) |
| 664 | case yaml_MAPPING_START_EVENT: |
| 665 | return yaml_emitter_emit_mapping_start(emitter, event) |
| 666 | default: |
| 667 | return yaml_emitter_set_emitter_error(emitter, |
| 668 | fmt.Sprintf("expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS, but got %v", event.typ)) |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | // Expect ALIAS. |
| 673 | func yaml_emitter_emit_alias(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 674 | if !yaml_emitter_process_anchor(emitter) { |
| 675 | return false |
| 676 | } |
| 677 | emitter.state = emitter.states[len(emitter.states)-1] |
| 678 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 679 | return true |
| 680 | } |
| 681 | |
| 682 | // Expect SCALAR. |
| 683 | func yaml_emitter_emit_scalar(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 684 | if !yaml_emitter_select_scalar_style(emitter, event) { |
| 685 | return false |
| 686 | } |
| 687 | if !yaml_emitter_process_anchor(emitter) { |
| 688 | return false |
| 689 | } |
| 690 | if !yaml_emitter_process_tag(emitter) { |
| 691 | return false |
| 692 | } |
| 693 | if !yaml_emitter_increase_indent(emitter, true, false) { |
| 694 | return false |
| 695 | } |
| 696 | if !yaml_emitter_process_scalar(emitter) { |
| 697 | return false |
| 698 | } |
| 699 | emitter.indent = emitter.indents[len(emitter.indents)-1] |
| 700 | emitter.indents = emitter.indents[:len(emitter.indents)-1] |
| 701 | emitter.state = emitter.states[len(emitter.states)-1] |
| 702 | emitter.states = emitter.states[:len(emitter.states)-1] |
| 703 | return true |
| 704 | } |
| 705 | |
| 706 | // Expect SEQUENCE-START. |
| 707 | func yaml_emitter_emit_sequence_start(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 708 | if !yaml_emitter_process_anchor(emitter) { |
| 709 | return false |
| 710 | } |
| 711 | if !yaml_emitter_process_tag(emitter) { |
| 712 | return false |
| 713 | } |
| 714 | if emitter.flow_level > 0 || emitter.canonical || event.sequence_style() == yaml_FLOW_SEQUENCE_STYLE || |
| 715 | yaml_emitter_check_empty_sequence(emitter) { |
| 716 | emitter.state = yaml_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE |
| 717 | } else { |
| 718 | emitter.state = yaml_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE |
| 719 | } |
| 720 | return true |
| 721 | } |
| 722 | |
| 723 | // Expect MAPPING-START. |
| 724 | func yaml_emitter_emit_mapping_start(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 725 | if !yaml_emitter_process_anchor(emitter) { |
| 726 | return false |
| 727 | } |
| 728 | if !yaml_emitter_process_tag(emitter) { |
| 729 | return false |
| 730 | } |
| 731 | if emitter.flow_level > 0 || emitter.canonical || event.mapping_style() == yaml_FLOW_MAPPING_STYLE || |
| 732 | yaml_emitter_check_empty_mapping(emitter) { |
| 733 | emitter.state = yaml_EMIT_FLOW_MAPPING_FIRST_KEY_STATE |
| 734 | } else { |
| 735 | emitter.state = yaml_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE |
| 736 | } |
| 737 | return true |
| 738 | } |
| 739 | |
| 740 | // Check if the document content is an empty scalar. |
| 741 | func yaml_emitter_check_empty_document(emitter *yaml_emitter_t) bool { |
| 742 | return false // [Go] Huh? |
| 743 | } |
| 744 | |
| 745 | // Check if the next events represent an empty sequence. |
| 746 | func yaml_emitter_check_empty_sequence(emitter *yaml_emitter_t) bool { |
| 747 | if len(emitter.events)-emitter.events_head < 2 { |
| 748 | return false |
| 749 | } |
| 750 | return emitter.events[emitter.events_head].typ == yaml_SEQUENCE_START_EVENT && |
| 751 | emitter.events[emitter.events_head+1].typ == yaml_SEQUENCE_END_EVENT |
| 752 | } |
| 753 | |
| 754 | // Check if the next events represent an empty mapping. |
| 755 | func yaml_emitter_check_empty_mapping(emitter *yaml_emitter_t) bool { |
| 756 | if len(emitter.events)-emitter.events_head < 2 { |
| 757 | return false |
| 758 | } |
| 759 | return emitter.events[emitter.events_head].typ == yaml_MAPPING_START_EVENT && |
| 760 | emitter.events[emitter.events_head+1].typ == yaml_MAPPING_END_EVENT |
| 761 | } |
| 762 | |
| 763 | // Check if the next node can be expressed as a simple key. |
| 764 | func yaml_emitter_check_simple_key(emitter *yaml_emitter_t) bool { |
| 765 | length := 0 |
| 766 | switch emitter.events[emitter.events_head].typ { |
| 767 | case yaml_ALIAS_EVENT: |
| 768 | length += len(emitter.anchor_data.anchor) |
| 769 | case yaml_SCALAR_EVENT: |
| 770 | if emitter.scalar_data.multiline { |
| 771 | return false |
| 772 | } |
| 773 | length += len(emitter.anchor_data.anchor) + |
| 774 | len(emitter.tag_data.handle) + |
| 775 | len(emitter.tag_data.suffix) + |
| 776 | len(emitter.scalar_data.value) |
| 777 | case yaml_SEQUENCE_START_EVENT: |
| 778 | if !yaml_emitter_check_empty_sequence(emitter) { |
| 779 | return false |
| 780 | } |
| 781 | length += len(emitter.anchor_data.anchor) + |
| 782 | len(emitter.tag_data.handle) + |
| 783 | len(emitter.tag_data.suffix) |
| 784 | case yaml_MAPPING_START_EVENT: |
| 785 | if !yaml_emitter_check_empty_mapping(emitter) { |
| 786 | return false |
| 787 | } |
| 788 | length += len(emitter.anchor_data.anchor) + |
| 789 | len(emitter.tag_data.handle) + |
| 790 | len(emitter.tag_data.suffix) |
| 791 | default: |
| 792 | return false |
| 793 | } |
| 794 | return length <= 128 |
| 795 | } |
| 796 | |
| 797 | // Determine an acceptable scalar style. |
| 798 | func yaml_emitter_select_scalar_style(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 799 | |
| 800 | no_tag := len(emitter.tag_data.handle) == 0 && len(emitter.tag_data.suffix) == 0 |
| 801 | if no_tag && !event.implicit && !event.quoted_implicit { |
| 802 | return yaml_emitter_set_emitter_error(emitter, "neither tag nor implicit flags are specified") |
| 803 | } |
| 804 | |
| 805 | style := event.scalar_style() |
| 806 | if style == yaml_ANY_SCALAR_STYLE { |
| 807 | style = yaml_PLAIN_SCALAR_STYLE |
| 808 | } |
| 809 | if emitter.canonical { |
| 810 | style = yaml_DOUBLE_QUOTED_SCALAR_STYLE |
| 811 | } |
| 812 | if emitter.simple_key_context && emitter.scalar_data.multiline { |
| 813 | style = yaml_DOUBLE_QUOTED_SCALAR_STYLE |
| 814 | } |
| 815 | |
| 816 | if style == yaml_PLAIN_SCALAR_STYLE { |
| 817 | if emitter.flow_level > 0 && !emitter.scalar_data.flow_plain_allowed || |
| 818 | emitter.flow_level == 0 && !emitter.scalar_data.block_plain_allowed { |
| 819 | style = yaml_SINGLE_QUOTED_SCALAR_STYLE |
| 820 | } |
| 821 | if len(emitter.scalar_data.value) == 0 && (emitter.flow_level > 0 || emitter.simple_key_context) { |
| 822 | style = yaml_SINGLE_QUOTED_SCALAR_STYLE |
| 823 | } |
| 824 | if no_tag && !event.implicit { |
| 825 | style = yaml_SINGLE_QUOTED_SCALAR_STYLE |
| 826 | } |
| 827 | } |
| 828 | if style == yaml_SINGLE_QUOTED_SCALAR_STYLE { |
| 829 | if !emitter.scalar_data.single_quoted_allowed { |
| 830 | style = yaml_DOUBLE_QUOTED_SCALAR_STYLE |
| 831 | } |
| 832 | } |
| 833 | if style == yaml_LITERAL_SCALAR_STYLE || style == yaml_FOLDED_SCALAR_STYLE { |
| 834 | if !emitter.scalar_data.block_allowed || emitter.flow_level > 0 || emitter.simple_key_context { |
| 835 | style = yaml_DOUBLE_QUOTED_SCALAR_STYLE |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | if no_tag && !event.quoted_implicit && style != yaml_PLAIN_SCALAR_STYLE { |
| 840 | emitter.tag_data.handle = []byte{'!'} |
| 841 | } |
| 842 | emitter.scalar_data.style = style |
| 843 | return true |
| 844 | } |
| 845 | |
| 846 | // Write an anchor. |
| 847 | func yaml_emitter_process_anchor(emitter *yaml_emitter_t) bool { |
| 848 | if emitter.anchor_data.anchor == nil { |
| 849 | return true |
| 850 | } |
| 851 | c := []byte{'&'} |
| 852 | if emitter.anchor_data.alias { |
| 853 | c[0] = '*' |
| 854 | } |
| 855 | if !yaml_emitter_write_indicator(emitter, c, true, false, false) { |
| 856 | return false |
| 857 | } |
| 858 | return yaml_emitter_write_anchor(emitter, emitter.anchor_data.anchor) |
| 859 | } |
| 860 | |
| 861 | // Write a tag. |
| 862 | func yaml_emitter_process_tag(emitter *yaml_emitter_t) bool { |
| 863 | if len(emitter.tag_data.handle) == 0 && len(emitter.tag_data.suffix) == 0 { |
| 864 | return true |
| 865 | } |
| 866 | if len(emitter.tag_data.handle) > 0 { |
| 867 | if !yaml_emitter_write_tag_handle(emitter, emitter.tag_data.handle) { |
| 868 | return false |
| 869 | } |
| 870 | if len(emitter.tag_data.suffix) > 0 { |
| 871 | if !yaml_emitter_write_tag_content(emitter, emitter.tag_data.suffix, false) { |
| 872 | return false |
| 873 | } |
| 874 | } |
| 875 | } else { |
| 876 | // [Go] Allocate these slices elsewhere. |
| 877 | if !yaml_emitter_write_indicator(emitter, []byte("!<"), true, false, false) { |
| 878 | return false |
| 879 | } |
| 880 | if !yaml_emitter_write_tag_content(emitter, emitter.tag_data.suffix, false) { |
| 881 | return false |
| 882 | } |
| 883 | if !yaml_emitter_write_indicator(emitter, []byte{'>'}, false, false, false) { |
| 884 | return false |
| 885 | } |
| 886 | } |
| 887 | return true |
| 888 | } |
| 889 | |
| 890 | // Write a scalar. |
| 891 | func yaml_emitter_process_scalar(emitter *yaml_emitter_t) bool { |
| 892 | switch emitter.scalar_data.style { |
| 893 | case yaml_PLAIN_SCALAR_STYLE: |
| 894 | return yaml_emitter_write_plain_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context) |
| 895 | |
| 896 | case yaml_SINGLE_QUOTED_SCALAR_STYLE: |
| 897 | return yaml_emitter_write_single_quoted_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context) |
| 898 | |
| 899 | case yaml_DOUBLE_QUOTED_SCALAR_STYLE: |
| 900 | return yaml_emitter_write_double_quoted_scalar(emitter, emitter.scalar_data.value, !emitter.simple_key_context) |
| 901 | |
| 902 | case yaml_LITERAL_SCALAR_STYLE: |
| 903 | return yaml_emitter_write_literal_scalar(emitter, emitter.scalar_data.value) |
| 904 | |
| 905 | case yaml_FOLDED_SCALAR_STYLE: |
| 906 | return yaml_emitter_write_folded_scalar(emitter, emitter.scalar_data.value) |
| 907 | } |
| 908 | panic("unknown scalar style") |
| 909 | } |
| 910 | |
| 911 | // Check if a %YAML directive is valid. |
| 912 | func yaml_emitter_analyze_version_directive(emitter *yaml_emitter_t, version_directive *yaml_version_directive_t) bool { |
| 913 | if version_directive.major != 1 || version_directive.minor != 1 { |
| 914 | return yaml_emitter_set_emitter_error(emitter, "incompatible %YAML directive") |
| 915 | } |
| 916 | return true |
| 917 | } |
| 918 | |
| 919 | // Check if a %TAG directive is valid. |
| 920 | func yaml_emitter_analyze_tag_directive(emitter *yaml_emitter_t, tag_directive *yaml_tag_directive_t) bool { |
| 921 | handle := tag_directive.handle |
| 922 | prefix := tag_directive.prefix |
| 923 | if len(handle) == 0 { |
| 924 | return yaml_emitter_set_emitter_error(emitter, "tag handle must not be empty") |
| 925 | } |
| 926 | if handle[0] != '!' { |
| 927 | return yaml_emitter_set_emitter_error(emitter, "tag handle must start with '!'") |
| 928 | } |
| 929 | if handle[len(handle)-1] != '!' { |
| 930 | return yaml_emitter_set_emitter_error(emitter, "tag handle must end with '!'") |
| 931 | } |
| 932 | for i := 1; i < len(handle)-1; i += width(handle[i]) { |
| 933 | if !is_alpha(handle, i) { |
| 934 | return yaml_emitter_set_emitter_error(emitter, "tag handle must contain alphanumerical characters only") |
| 935 | } |
| 936 | } |
| 937 | if len(prefix) == 0 { |
| 938 | return yaml_emitter_set_emitter_error(emitter, "tag prefix must not be empty") |
| 939 | } |
| 940 | return true |
| 941 | } |
| 942 | |
| 943 | // Check if an anchor is valid. |
| 944 | func yaml_emitter_analyze_anchor(emitter *yaml_emitter_t, anchor []byte, alias bool) bool { |
| 945 | if len(anchor) == 0 { |
| 946 | problem := "anchor value must not be empty" |
| 947 | if alias { |
| 948 | problem = "alias value must not be empty" |
| 949 | } |
| 950 | return yaml_emitter_set_emitter_error(emitter, problem) |
| 951 | } |
| 952 | for i := 0; i < len(anchor); i += width(anchor[i]) { |
| 953 | if !is_alpha(anchor, i) { |
| 954 | problem := "anchor value must contain alphanumerical characters only" |
| 955 | if alias { |
| 956 | problem = "alias value must contain alphanumerical characters only" |
| 957 | } |
| 958 | return yaml_emitter_set_emitter_error(emitter, problem) |
| 959 | } |
| 960 | } |
| 961 | emitter.anchor_data.anchor = anchor |
| 962 | emitter.anchor_data.alias = alias |
| 963 | return true |
| 964 | } |
| 965 | |
| 966 | // Check if a tag is valid. |
| 967 | func yaml_emitter_analyze_tag(emitter *yaml_emitter_t, tag []byte) bool { |
| 968 | if len(tag) == 0 { |
| 969 | return yaml_emitter_set_emitter_error(emitter, "tag value must not be empty") |
| 970 | } |
| 971 | for i := 0; i < len(emitter.tag_directives); i++ { |
| 972 | tag_directive := &emitter.tag_directives[i] |
| 973 | if bytes.HasPrefix(tag, tag_directive.prefix) { |
| 974 | emitter.tag_data.handle = tag_directive.handle |
| 975 | emitter.tag_data.suffix = tag[len(tag_directive.prefix):] |
| 976 | return true |
| 977 | } |
| 978 | } |
| 979 | emitter.tag_data.suffix = tag |
| 980 | return true |
| 981 | } |
| 982 | |
| 983 | // Check if a scalar is valid. |
| 984 | func yaml_emitter_analyze_scalar(emitter *yaml_emitter_t, value []byte) bool { |
| 985 | var ( |
| 986 | block_indicators = false |
| 987 | flow_indicators = false |
| 988 | line_breaks = false |
| 989 | special_characters = false |
| 990 | |
| 991 | leading_space = false |
| 992 | leading_break = false |
| 993 | trailing_space = false |
| 994 | trailing_break = false |
| 995 | break_space = false |
| 996 | space_break = false |
| 997 | |
| 998 | preceded_by_whitespace = false |
| 999 | followed_by_whitespace = false |
| 1000 | previous_space = false |
| 1001 | previous_break = false |
| 1002 | ) |
| 1003 | |
| 1004 | emitter.scalar_data.value = value |
| 1005 | |
| 1006 | if len(value) == 0 { |
| 1007 | emitter.scalar_data.multiline = false |
| 1008 | emitter.scalar_data.flow_plain_allowed = false |
| 1009 | emitter.scalar_data.block_plain_allowed = true |
| 1010 | emitter.scalar_data.single_quoted_allowed = true |
| 1011 | emitter.scalar_data.block_allowed = false |
| 1012 | return true |
| 1013 | } |
| 1014 | |
| 1015 | if len(value) >= 3 && ((value[0] == '-' && value[1] == '-' && value[2] == '-') || (value[0] == '.' && value[1] == '.' && value[2] == '.')) { |
| 1016 | block_indicators = true |
| 1017 | flow_indicators = true |
| 1018 | } |
| 1019 | |
| 1020 | preceded_by_whitespace = true |
| 1021 | for i, w := 0, 0; i < len(value); i += w { |
| 1022 | w = width(value[i]) |
| 1023 | followed_by_whitespace = i+w >= len(value) || is_blank(value, i+w) |
| 1024 | |
| 1025 | if i == 0 { |
| 1026 | switch value[i] { |
| 1027 | case '#', ',', '[', ']', '{', '}', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`': |
| 1028 | flow_indicators = true |
| 1029 | block_indicators = true |
| 1030 | case '?', ':': |
| 1031 | flow_indicators = true |
| 1032 | if followed_by_whitespace { |
| 1033 | block_indicators = true |
| 1034 | } |
| 1035 | case '-': |
| 1036 | if followed_by_whitespace { |
| 1037 | flow_indicators = true |
| 1038 | block_indicators = true |
| 1039 | } |
| 1040 | } |
| 1041 | } else { |
| 1042 | switch value[i] { |
| 1043 | case ',', '?', '[', ']', '{', '}': |
| 1044 | flow_indicators = true |
| 1045 | case ':': |
| 1046 | flow_indicators = true |
| 1047 | if followed_by_whitespace { |
| 1048 | block_indicators = true |
| 1049 | } |
| 1050 | case '#': |
| 1051 | if preceded_by_whitespace { |
| 1052 | flow_indicators = true |
| 1053 | block_indicators = true |
| 1054 | } |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | if !is_printable(value, i) || !is_ascii(value, i) && !emitter.unicode { |
| 1059 | special_characters = true |
| 1060 | } |
| 1061 | if is_space(value, i) { |
| 1062 | if i == 0 { |
| 1063 | leading_space = true |
| 1064 | } |
| 1065 | if i+width(value[i]) == len(value) { |
| 1066 | trailing_space = true |
| 1067 | } |
| 1068 | if previous_break { |
| 1069 | break_space = true |
| 1070 | } |
| 1071 | previous_space = true |
| 1072 | previous_break = false |
| 1073 | } else if is_break(value, i) { |
| 1074 | line_breaks = true |
| 1075 | if i == 0 { |
| 1076 | leading_break = true |
| 1077 | } |
| 1078 | if i+width(value[i]) == len(value) { |
| 1079 | trailing_break = true |
| 1080 | } |
| 1081 | if previous_space { |
| 1082 | space_break = true |
| 1083 | } |
| 1084 | previous_space = false |
| 1085 | previous_break = true |
| 1086 | } else { |
| 1087 | previous_space = false |
| 1088 | previous_break = false |
| 1089 | } |
| 1090 | |
| 1091 | // [Go]: Why 'z'? Couldn't be the end of the string as that's the loop condition. |
| 1092 | preceded_by_whitespace = is_blankz(value, i) |
| 1093 | } |
| 1094 | |
| 1095 | emitter.scalar_data.multiline = line_breaks |
| 1096 | emitter.scalar_data.flow_plain_allowed = true |
| 1097 | emitter.scalar_data.block_plain_allowed = true |
| 1098 | emitter.scalar_data.single_quoted_allowed = true |
| 1099 | emitter.scalar_data.block_allowed = true |
| 1100 | |
| 1101 | if leading_space || leading_break || trailing_space || trailing_break { |
| 1102 | emitter.scalar_data.flow_plain_allowed = false |
| 1103 | emitter.scalar_data.block_plain_allowed = false |
| 1104 | } |
| 1105 | if trailing_space { |
| 1106 | emitter.scalar_data.block_allowed = false |
| 1107 | } |
| 1108 | if break_space { |
| 1109 | emitter.scalar_data.flow_plain_allowed = false |
| 1110 | emitter.scalar_data.block_plain_allowed = false |
| 1111 | emitter.scalar_data.single_quoted_allowed = false |
| 1112 | } |
| 1113 | if space_break || special_characters { |
| 1114 | emitter.scalar_data.flow_plain_allowed = false |
| 1115 | emitter.scalar_data.block_plain_allowed = false |
| 1116 | emitter.scalar_data.single_quoted_allowed = false |
| 1117 | emitter.scalar_data.block_allowed = false |
| 1118 | } |
| 1119 | if line_breaks { |
| 1120 | emitter.scalar_data.flow_plain_allowed = false |
| 1121 | emitter.scalar_data.block_plain_allowed = false |
| 1122 | } |
| 1123 | if flow_indicators { |
| 1124 | emitter.scalar_data.flow_plain_allowed = false |
| 1125 | } |
| 1126 | if block_indicators { |
| 1127 | emitter.scalar_data.block_plain_allowed = false |
| 1128 | } |
| 1129 | return true |
| 1130 | } |
| 1131 | |
| 1132 | // Check if the event data is valid. |
| 1133 | func yaml_emitter_analyze_event(emitter *yaml_emitter_t, event *yaml_event_t) bool { |
| 1134 | |
| 1135 | emitter.anchor_data.anchor = nil |
| 1136 | emitter.tag_data.handle = nil |
| 1137 | emitter.tag_data.suffix = nil |
| 1138 | emitter.scalar_data.value = nil |
| 1139 | |
| 1140 | switch event.typ { |
| 1141 | case yaml_ALIAS_EVENT: |
| 1142 | if !yaml_emitter_analyze_anchor(emitter, event.anchor, true) { |
| 1143 | return false |
| 1144 | } |
| 1145 | |
| 1146 | case yaml_SCALAR_EVENT: |
| 1147 | if len(event.anchor) > 0 { |
| 1148 | if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) { |
| 1149 | return false |
| 1150 | } |
| 1151 | } |
| 1152 | if len(event.tag) > 0 && (emitter.canonical || (!event.implicit && !event.quoted_implicit)) { |
| 1153 | if !yaml_emitter_analyze_tag(emitter, event.tag) { |
| 1154 | return false |
| 1155 | } |
| 1156 | } |
| 1157 | if !yaml_emitter_analyze_scalar(emitter, event.value) { |
| 1158 | return false |
| 1159 | } |
| 1160 | |
| 1161 | case yaml_SEQUENCE_START_EVENT: |
| 1162 | if len(event.anchor) > 0 { |
| 1163 | if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) { |
| 1164 | return false |
| 1165 | } |
| 1166 | } |
| 1167 | if len(event.tag) > 0 && (emitter.canonical || !event.implicit) { |
| 1168 | if !yaml_emitter_analyze_tag(emitter, event.tag) { |
| 1169 | return false |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | case yaml_MAPPING_START_EVENT: |
| 1174 | if len(event.anchor) > 0 { |
| 1175 | if !yaml_emitter_analyze_anchor(emitter, event.anchor, false) { |
| 1176 | return false |
| 1177 | } |
| 1178 | } |
| 1179 | if len(event.tag) > 0 && (emitter.canonical || !event.implicit) { |
| 1180 | if !yaml_emitter_analyze_tag(emitter, event.tag) { |
| 1181 | return false |
| 1182 | } |
| 1183 | } |
| 1184 | } |
| 1185 | return true |
| 1186 | } |
| 1187 | |
| 1188 | // Write the BOM character. |
| 1189 | func yaml_emitter_write_bom(emitter *yaml_emitter_t) bool { |
| 1190 | if !flush(emitter) { |
| 1191 | return false |
| 1192 | } |
| 1193 | pos := emitter.buffer_pos |
| 1194 | emitter.buffer[pos+0] = '\xEF' |
| 1195 | emitter.buffer[pos+1] = '\xBB' |
| 1196 | emitter.buffer[pos+2] = '\xBF' |
| 1197 | emitter.buffer_pos += 3 |
| 1198 | return true |
| 1199 | } |
| 1200 | |
| 1201 | func yaml_emitter_write_indent(emitter *yaml_emitter_t) bool { |
| 1202 | indent := emitter.indent |
| 1203 | if indent < 0 { |
| 1204 | indent = 0 |
| 1205 | } |
| 1206 | if !emitter.indention || emitter.column > indent || (emitter.column == indent && !emitter.whitespace) { |
| 1207 | if !put_break(emitter) { |
| 1208 | return false |
| 1209 | } |
| 1210 | } |
| 1211 | for emitter.column < indent { |
| 1212 | if !put(emitter, ' ') { |
| 1213 | return false |
| 1214 | } |
| 1215 | } |
| 1216 | emitter.whitespace = true |
| 1217 | emitter.indention = true |
| 1218 | return true |
| 1219 | } |
| 1220 | |
| 1221 | func yaml_emitter_write_indicator(emitter *yaml_emitter_t, indicator []byte, need_whitespace, is_whitespace, is_indention bool) bool { |
| 1222 | if need_whitespace && !emitter.whitespace { |
| 1223 | if !put(emitter, ' ') { |
| 1224 | return false |
| 1225 | } |
| 1226 | } |
| 1227 | if !write_all(emitter, indicator) { |
| 1228 | return false |
| 1229 | } |
| 1230 | emitter.whitespace = is_whitespace |
| 1231 | emitter.indention = (emitter.indention && is_indention) |
| 1232 | emitter.open_ended = false |
| 1233 | return true |
| 1234 | } |
| 1235 | |
| 1236 | func yaml_emitter_write_anchor(emitter *yaml_emitter_t, value []byte) bool { |
| 1237 | if !write_all(emitter, value) { |
| 1238 | return false |
| 1239 | } |
| 1240 | emitter.whitespace = false |
| 1241 | emitter.indention = false |
| 1242 | return true |
| 1243 | } |
| 1244 | |
| 1245 | func yaml_emitter_write_tag_handle(emitter *yaml_emitter_t, value []byte) bool { |
| 1246 | if !emitter.whitespace { |
| 1247 | if !put(emitter, ' ') { |
| 1248 | return false |
| 1249 | } |
| 1250 | } |
| 1251 | if !write_all(emitter, value) { |
| 1252 | return false |
| 1253 | } |
| 1254 | emitter.whitespace = false |
| 1255 | emitter.indention = false |
| 1256 | return true |
| 1257 | } |
| 1258 | |
| 1259 | func yaml_emitter_write_tag_content(emitter *yaml_emitter_t, value []byte, need_whitespace bool) bool { |
| 1260 | if need_whitespace && !emitter.whitespace { |
| 1261 | if !put(emitter, ' ') { |
| 1262 | return false |
| 1263 | } |
| 1264 | } |
| 1265 | for i := 0; i < len(value); { |
| 1266 | var must_write bool |
| 1267 | switch value[i] { |
| 1268 | case ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '_', '.', '~', '*', '\'', '(', ')', '[', ']': |
| 1269 | must_write = true |
| 1270 | default: |
| 1271 | must_write = is_alpha(value, i) |
| 1272 | } |
| 1273 | if must_write { |
| 1274 | if !write(emitter, value, &i) { |
| 1275 | return false |
| 1276 | } |
| 1277 | } else { |
| 1278 | w := width(value[i]) |
| 1279 | for k := 0; k < w; k++ { |
| 1280 | octet := value[i] |
| 1281 | i++ |
| 1282 | if !put(emitter, '%') { |
| 1283 | return false |
| 1284 | } |
| 1285 | |
| 1286 | c := octet >> 4 |
| 1287 | if c < 10 { |
| 1288 | c += '0' |
| 1289 | } else { |
| 1290 | c += 'A' - 10 |
| 1291 | } |
| 1292 | if !put(emitter, c) { |
| 1293 | return false |
| 1294 | } |
| 1295 | |
| 1296 | c = octet & 0x0f |
| 1297 | if c < 10 { |
| 1298 | c += '0' |
| 1299 | } else { |
| 1300 | c += 'A' - 10 |
| 1301 | } |
| 1302 | if !put(emitter, c) { |
| 1303 | return false |
| 1304 | } |
| 1305 | } |
| 1306 | } |
| 1307 | } |
| 1308 | emitter.whitespace = false |
| 1309 | emitter.indention = false |
| 1310 | return true |
| 1311 | } |
| 1312 | |
| 1313 | func yaml_emitter_write_plain_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool { |
| 1314 | if !emitter.whitespace { |
| 1315 | if !put(emitter, ' ') { |
| 1316 | return false |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | spaces := false |
| 1321 | breaks := false |
| 1322 | for i := 0; i < len(value); { |
| 1323 | if is_space(value, i) { |
| 1324 | if allow_breaks && !spaces && emitter.column > emitter.best_width && !is_space(value, i+1) { |
| 1325 | if !yaml_emitter_write_indent(emitter) { |
| 1326 | return false |
| 1327 | } |
| 1328 | i += width(value[i]) |
| 1329 | } else { |
| 1330 | if !write(emitter, value, &i) { |
| 1331 | return false |
| 1332 | } |
| 1333 | } |
| 1334 | spaces = true |
| 1335 | } else if is_break(value, i) { |
| 1336 | if !breaks && value[i] == '\n' { |
| 1337 | if !put_break(emitter) { |
| 1338 | return false |
| 1339 | } |
| 1340 | } |
| 1341 | if !write_break(emitter, value, &i) { |
| 1342 | return false |
| 1343 | } |
| 1344 | emitter.indention = true |
| 1345 | breaks = true |
| 1346 | } else { |
| 1347 | if breaks { |
| 1348 | if !yaml_emitter_write_indent(emitter) { |
| 1349 | return false |
| 1350 | } |
| 1351 | } |
| 1352 | if !write(emitter, value, &i) { |
| 1353 | return false |
| 1354 | } |
| 1355 | emitter.indention = false |
| 1356 | spaces = false |
| 1357 | breaks = false |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | emitter.whitespace = false |
| 1362 | emitter.indention = false |
| 1363 | if emitter.root_context { |
| 1364 | emitter.open_ended = true |
| 1365 | } |
| 1366 | |
| 1367 | return true |
| 1368 | } |
| 1369 | |
| 1370 | func yaml_emitter_write_single_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool { |
| 1371 | |
| 1372 | if !yaml_emitter_write_indicator(emitter, []byte{'\''}, true, false, false) { |
| 1373 | return false |
| 1374 | } |
| 1375 | |
| 1376 | spaces := false |
| 1377 | breaks := false |
| 1378 | for i := 0; i < len(value); { |
| 1379 | if is_space(value, i) { |
| 1380 | if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 && !is_space(value, i+1) { |
| 1381 | if !yaml_emitter_write_indent(emitter) { |
| 1382 | return false |
| 1383 | } |
| 1384 | i += width(value[i]) |
| 1385 | } else { |
| 1386 | if !write(emitter, value, &i) { |
| 1387 | return false |
| 1388 | } |
| 1389 | } |
| 1390 | spaces = true |
| 1391 | } else if is_break(value, i) { |
| 1392 | if !breaks && value[i] == '\n' { |
| 1393 | if !put_break(emitter) { |
| 1394 | return false |
| 1395 | } |
| 1396 | } |
| 1397 | if !write_break(emitter, value, &i) { |
| 1398 | return false |
| 1399 | } |
| 1400 | emitter.indention = true |
| 1401 | breaks = true |
| 1402 | } else { |
| 1403 | if breaks { |
| 1404 | if !yaml_emitter_write_indent(emitter) { |
| 1405 | return false |
| 1406 | } |
| 1407 | } |
| 1408 | if value[i] == '\'' { |
| 1409 | if !put(emitter, '\'') { |
| 1410 | return false |
| 1411 | } |
| 1412 | } |
| 1413 | if !write(emitter, value, &i) { |
| 1414 | return false |
| 1415 | } |
| 1416 | emitter.indention = false |
| 1417 | spaces = false |
| 1418 | breaks = false |
| 1419 | } |
| 1420 | } |
| 1421 | if !yaml_emitter_write_indicator(emitter, []byte{'\''}, false, false, false) { |
| 1422 | return false |
| 1423 | } |
| 1424 | emitter.whitespace = false |
| 1425 | emitter.indention = false |
| 1426 | return true |
| 1427 | } |
| 1428 | |
| 1429 | func yaml_emitter_write_double_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool { |
| 1430 | spaces := false |
| 1431 | if !yaml_emitter_write_indicator(emitter, []byte{'"'}, true, false, false) { |
| 1432 | return false |
| 1433 | } |
| 1434 | |
| 1435 | for i := 0; i < len(value); { |
| 1436 | if !is_printable(value, i) || (!emitter.unicode && !is_ascii(value, i)) || |
| 1437 | is_bom(value, i) || is_break(value, i) || |
| 1438 | value[i] == '"' || value[i] == '\\' { |
| 1439 | |
| 1440 | octet := value[i] |
| 1441 | |
| 1442 | var w int |
| 1443 | var v rune |
| 1444 | switch { |
| 1445 | case octet&0x80 == 0x00: |
| 1446 | w, v = 1, rune(octet&0x7F) |
| 1447 | case octet&0xE0 == 0xC0: |
| 1448 | w, v = 2, rune(octet&0x1F) |
| 1449 | case octet&0xF0 == 0xE0: |
| 1450 | w, v = 3, rune(octet&0x0F) |
| 1451 | case octet&0xF8 == 0xF0: |
| 1452 | w, v = 4, rune(octet&0x07) |
| 1453 | } |
| 1454 | for k := 1; k < w; k++ { |
| 1455 | octet = value[i+k] |
| 1456 | v = (v << 6) + (rune(octet) & 0x3F) |
| 1457 | } |
| 1458 | i += w |
| 1459 | |
| 1460 | if !put(emitter, '\\') { |
| 1461 | return false |
| 1462 | } |
| 1463 | |
| 1464 | var ok bool |
| 1465 | switch v { |
| 1466 | case 0x00: |
| 1467 | ok = put(emitter, '0') |
| 1468 | case 0x07: |
| 1469 | ok = put(emitter, 'a') |
| 1470 | case 0x08: |
| 1471 | ok = put(emitter, 'b') |
| 1472 | case 0x09: |
| 1473 | ok = put(emitter, 't') |
| 1474 | case 0x0A: |
| 1475 | ok = put(emitter, 'n') |
| 1476 | case 0x0b: |
| 1477 | ok = put(emitter, 'v') |
| 1478 | case 0x0c: |
| 1479 | ok = put(emitter, 'f') |
| 1480 | case 0x0d: |
| 1481 | ok = put(emitter, 'r') |
| 1482 | case 0x1b: |
| 1483 | ok = put(emitter, 'e') |
| 1484 | case 0x22: |
| 1485 | ok = put(emitter, '"') |
| 1486 | case 0x5c: |
| 1487 | ok = put(emitter, '\\') |
| 1488 | case 0x85: |
| 1489 | ok = put(emitter, 'N') |
| 1490 | case 0xA0: |
| 1491 | ok = put(emitter, '_') |
| 1492 | case 0x2028: |
| 1493 | ok = put(emitter, 'L') |
| 1494 | case 0x2029: |
| 1495 | ok = put(emitter, 'P') |
| 1496 | default: |
| 1497 | if v <= 0xFF { |
| 1498 | ok = put(emitter, 'x') |
| 1499 | w = 2 |
| 1500 | } else if v <= 0xFFFF { |
| 1501 | ok = put(emitter, 'u') |
| 1502 | w = 4 |
| 1503 | } else { |
| 1504 | ok = put(emitter, 'U') |
| 1505 | w = 8 |
| 1506 | } |
| 1507 | for k := (w - 1) * 4; ok && k >= 0; k -= 4 { |
| 1508 | digit := byte((v >> uint(k)) & 0x0F) |
| 1509 | if digit < 10 { |
| 1510 | ok = put(emitter, digit+'0') |
| 1511 | } else { |
| 1512 | ok = put(emitter, digit+'A'-10) |
| 1513 | } |
| 1514 | } |
| 1515 | } |
| 1516 | if !ok { |
| 1517 | return false |
| 1518 | } |
| 1519 | spaces = false |
| 1520 | } else if is_space(value, i) { |
| 1521 | if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 { |
| 1522 | if !yaml_emitter_write_indent(emitter) { |
| 1523 | return false |
| 1524 | } |
| 1525 | if is_space(value, i+1) { |
| 1526 | if !put(emitter, '\\') { |
| 1527 | return false |
| 1528 | } |
| 1529 | } |
| 1530 | i += width(value[i]) |
| 1531 | } else if !write(emitter, value, &i) { |
| 1532 | return false |
| 1533 | } |
| 1534 | spaces = true |
| 1535 | } else { |
| 1536 | if !write(emitter, value, &i) { |
| 1537 | return false |
| 1538 | } |
| 1539 | spaces = false |
| 1540 | } |
| 1541 | } |
| 1542 | if !yaml_emitter_write_indicator(emitter, []byte{'"'}, false, false, false) { |
| 1543 | return false |
| 1544 | } |
| 1545 | emitter.whitespace = false |
| 1546 | emitter.indention = false |
| 1547 | return true |
| 1548 | } |
| 1549 | |
| 1550 | func yaml_emitter_write_block_scalar_hints(emitter *yaml_emitter_t, value []byte) bool { |
| 1551 | if is_space(value, 0) || is_break(value, 0) { |
| 1552 | indent_hint := []byte{'0' + byte(emitter.best_indent)} |
| 1553 | if !yaml_emitter_write_indicator(emitter, indent_hint, false, false, false) { |
| 1554 | return false |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | emitter.open_ended = false |
| 1559 | |
| 1560 | var chomp_hint [1]byte |
| 1561 | if len(value) == 0 { |
| 1562 | chomp_hint[0] = '-' |
| 1563 | } else { |
| 1564 | i := len(value) - 1 |
| 1565 | for value[i]&0xC0 == 0x80 { |
| 1566 | i-- |
| 1567 | } |
| 1568 | if !is_break(value, i) { |
| 1569 | chomp_hint[0] = '-' |
| 1570 | } else if i == 0 { |
| 1571 | chomp_hint[0] = '+' |
| 1572 | emitter.open_ended = true |
| 1573 | } else { |
| 1574 | i-- |
| 1575 | for value[i]&0xC0 == 0x80 { |
| 1576 | i-- |
| 1577 | } |
| 1578 | if is_break(value, i) { |
| 1579 | chomp_hint[0] = '+' |
| 1580 | emitter.open_ended = true |
| 1581 | } |
| 1582 | } |
| 1583 | } |
| 1584 | if chomp_hint[0] != 0 { |
| 1585 | if !yaml_emitter_write_indicator(emitter, chomp_hint[:], false, false, false) { |
| 1586 | return false |
| 1587 | } |
| 1588 | } |
| 1589 | return true |
| 1590 | } |
| 1591 | |
| 1592 | func yaml_emitter_write_literal_scalar(emitter *yaml_emitter_t, value []byte) bool { |
| 1593 | if !yaml_emitter_write_indicator(emitter, []byte{'|'}, true, false, false) { |
| 1594 | return false |
| 1595 | } |
| 1596 | if !yaml_emitter_write_block_scalar_hints(emitter, value) { |
| 1597 | return false |
| 1598 | } |
| 1599 | if !put_break(emitter) { |
| 1600 | return false |
| 1601 | } |
| 1602 | emitter.indention = true |
| 1603 | emitter.whitespace = true |
| 1604 | breaks := true |
| 1605 | for i := 0; i < len(value); { |
| 1606 | if is_break(value, i) { |
| 1607 | if !write_break(emitter, value, &i) { |
| 1608 | return false |
| 1609 | } |
| 1610 | emitter.indention = true |
| 1611 | breaks = true |
| 1612 | } else { |
| 1613 | if breaks { |
| 1614 | if !yaml_emitter_write_indent(emitter) { |
| 1615 | return false |
| 1616 | } |
| 1617 | } |
| 1618 | if !write(emitter, value, &i) { |
| 1619 | return false |
| 1620 | } |
| 1621 | emitter.indention = false |
| 1622 | breaks = false |
| 1623 | } |
| 1624 | } |
| 1625 | |
| 1626 | return true |
| 1627 | } |
| 1628 | |
| 1629 | func yaml_emitter_write_folded_scalar(emitter *yaml_emitter_t, value []byte) bool { |
| 1630 | if !yaml_emitter_write_indicator(emitter, []byte{'>'}, true, false, false) { |
| 1631 | return false |
| 1632 | } |
| 1633 | if !yaml_emitter_write_block_scalar_hints(emitter, value) { |
| 1634 | return false |
| 1635 | } |
| 1636 | |
| 1637 | if !put_break(emitter) { |
| 1638 | return false |
| 1639 | } |
| 1640 | emitter.indention = true |
| 1641 | emitter.whitespace = true |
| 1642 | |
| 1643 | breaks := true |
| 1644 | leading_spaces := true |
| 1645 | for i := 0; i < len(value); { |
| 1646 | if is_break(value, i) { |
| 1647 | if !breaks && !leading_spaces && value[i] == '\n' { |
| 1648 | k := 0 |
| 1649 | for is_break(value, k) { |
| 1650 | k += width(value[k]) |
| 1651 | } |
| 1652 | if !is_blankz(value, k) { |
| 1653 | if !put_break(emitter) { |
| 1654 | return false |
| 1655 | } |
| 1656 | } |
| 1657 | } |
| 1658 | if !write_break(emitter, value, &i) { |
| 1659 | return false |
| 1660 | } |
| 1661 | emitter.indention = true |
| 1662 | breaks = true |
| 1663 | } else { |
| 1664 | if breaks { |
| 1665 | if !yaml_emitter_write_indent(emitter) { |
| 1666 | return false |
| 1667 | } |
| 1668 | leading_spaces = is_blank(value, i) |
| 1669 | } |
| 1670 | if !breaks && is_space(value, i) && !is_space(value, i+1) && emitter.column > emitter.best_width { |
| 1671 | if !yaml_emitter_write_indent(emitter) { |
| 1672 | return false |
| 1673 | } |
| 1674 | i += width(value[i]) |
| 1675 | } else { |
| 1676 | if !write(emitter, value, &i) { |
| 1677 | return false |
| 1678 | } |
| 1679 | } |
| 1680 | emitter.indention = false |
| 1681 | breaks = false |
| 1682 | } |
| 1683 | } |
| 1684 | return true |
| 1685 | } |