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How to use emit_u32v method in wpt

Best JavaScript code snippet using wpt

wasm_module_builder.js

Source:wasm_module_builder.js

...19    this.push((val >> 8) & 0xff);20    this.push((val >> 16) & 0xff);21    this.push((val >> 24) & 0xff);22  }23  emit_u32v(val) {24    while (true) {25      let v = val & 0xff;26      val = val >>> 7;27      if (val == 0) {28        this.push(v);29        break;30      }31      this.push(v | 0x80);32    }33  }34  emit_bytes(data) {35    for (let i = 0; i < data.length; i++) {36      this.push(data[i] & 0xff);37    }38  }39  emit_string(string) {40    // When testing illegal names, we pass a byte array directly.41    if (string instanceof Array) {42      this.emit_u32v(string.length);43      this.emit_bytes(string);44      return;45    }46    // This is the hacky way to convert a JavaScript string to a UTF8 encoded47    // string only containing single-byte characters.48    let string_utf8 = unescape(encodeURIComponent(string));49    this.emit_u32v(string_utf8.length);50    for (let i = 0; i < string_utf8.length; i++) {51      this.emit_u8(string_utf8.charCodeAt(i));52    }53  }54  emit_header() {55    this.push(kWasmH0, kWasmH1, kWasmH2, kWasmH3,56              kWasmV0, kWasmV1, kWasmV2, kWasmV3);57  }58  emit_section(section_code, content_generator) {59    // Emit section name.60    this.emit_u8(section_code);61    // Emit the section to a temporary buffer: its full length isn't know yet.62    let section = new Binary;63    content_generator(section);64    // Emit section length.65    this.emit_u32v(section.length);66    // Copy the temporary buffer.67    for (var i = 0; i < section.length; i++) this.push(section[i]);68  }69}70class FunctionBodyBuilder extends Binary {71  get_local(index) {72    this.emit_u8(kExprGetLocal);73    this.emit_u32v(index);74    return this;75  }76  i32_const(k) {77    this.emit_u8(kExprI32Const);78    this.emit_u32v(k);79    return this;80  }81  i32_load(args) {82    let align = args != undefined && args.align != undefined ? args.align : 1;83    let offset =84        args != undefined && args.offset != undefined ? args.offset : 0;85    this.emit_u8(kExprI32LoadMem);86    this.emit_u32v(align);87    this.emit_u32v(offset);88    return this;89  }90  i32_store(args) {91    let align = args != undefined && args.align != undefined ? args.align : 1;92    let offset =93        args != undefined && args.offset != undefined ? args.offset : 0;94    this.emit_u8(kExprI32StoreMem);95    this.emit_u32v(align);96    this.emit_u32v(offset);97    return this;98  }99  grow_memory() {100    this.emit_u8(kExprGrowMemory);101    this.emit_u8(0);102    return this;103  }104  end() {105    this.emit_u8(kExprEnd);106  }107}108class WasmFunctionBuilder {109  constructor(module, name, type_index) {110    this.module = module;111    this.name = name;112    this.type_index = type_index;113    this.body = new FunctionBodyBuilder;114  }115  numLocalNames() {116    if (this.local_names === undefined) return 0;117    let num_local_names = 0;118    for (let loc_name of this.local_names) {119      if (loc_name !== undefined) ++num_local_names;120    }121    return num_local_names;122  }123  exportAs(name) {124    this.module.addExport(name, this.index);125    return this;126  }127  exportFunc() {128    this.exportAs(this.name);129    return this;130  }131  addBody(body) {132    for (let b of body) {133      if (typeof b !== 'number' || (b & (~0xFF)) !== 0 )134        throw new Error('invalid body (entries must be 8 bit values): ' + body);135    }136    this.body = body.slice();137    // Automatically add the end for the function block to the body.138    this.body.push(kExprEnd);139    return this;140  }141  addBodyWithEnd(body) {142    this.body = body;143    return this;144  }145  addLocals(locals, names) {146    this.locals = locals;147    this.local_names = names;148    return this;149  }150  end() {151    return this.module;152  }153}154class WasmGlobalBuilder {155  constructor(module, type, mutable) {156    this.module = module;157    this.type = type;158    this.mutable = mutable;159    this.init = 0;160  }161  exportAs(name) {162    this.module.exports.push({name: name, kind: kExternalGlobal,163                              index: this.index});164    return this;165  }166}167class WasmModuleBuilder {168  constructor() {169    this.types = [];170    this.imports = [];171    this.exports = [];172    this.globals = [];173    this.exceptions = [];174    this.functions = [];175    this.function_table = [];176    this.function_table_length = 0;177    this.function_table_inits = [];178    this.segments = [];179    this.explicit = [];180    this.num_imported_funcs = 0;181    this.num_imported_globals = 0;182    return this;183  }184  addStart(start_index) {185    this.start_index = start_index;186    return this;187  }188  addMemory(min, max, exp) {189    this.memory = {min: min, max: max, exp: exp};190    return this;191  }192  addExplicitSection(bytes) {193    this.explicit.push(bytes);194    return this;195  }196  stringToBytes(name) {197    var result = new Binary();198    result.emit_u32v(name.length);199    for (var i = 0; i < name.length; i++) {200      result.emit_u8(name.charCodeAt(i));201    }202    return result;203  }204  addCustomSection(name, bytes) {205    name = this.stringToBytes(name);206    var length = new Binary();207    length.emit_u32v(name.length + bytes.length);208    this.explicit.push([0, ...length, ...name, ...bytes]);209  }210  addType(type) {211    this.types.push(type);212    var pl = type.params.length;  // should have params213    var rl = type.results.length; // should have results214    return this.types.length - 1;215  }216  addGlobal(local_type, mutable) {217    let glob = new WasmGlobalBuilder(this, local_type, mutable);218    glob.index = this.globals.length + this.num_imported_globals;219    this.globals.push(glob);220    return glob;221  }222  addException(type) {223    if (type.results.length != 0)224      throw new Error('Invalid exception signature: ' + type);225    this.exceptions.push(type);226    return this.exceptions.length - 1;227  }228  addFunction(name, type) {229    let type_index = (typeof type) == "number" ? type : this.addType(type);230    let func = new WasmFunctionBuilder(this, name, type_index);231    func.index = this.functions.length + this.num_imported_funcs;232    this.functions.push(func);233    return func;234  }235  addImport(module = "", name, type) {236    let type_index = (typeof type) == "number" ? type : this.addType(type);237    this.imports.push({module: module, name: name, kind: kExternalFunction,238                       type: type_index});239    return this.num_imported_funcs++;240  }241  addImportedGlobal(module = "", name, type) {242    let o = {module: module, name: name, kind: kExternalGlobal, type: type,243             mutable: false}244    this.imports.push(o);245    return this.num_imported_globals++;246  }247  addImportedMemory(module = "", name, initial = 0, maximum) {248    let o = {module: module, name: name, kind: kExternalMemory,249             initial: initial, maximum: maximum};250    this.imports.push(o);251    return this;252  }253  addImportedTable(module = "", name, initial, maximum) {254    let o = {module: module, name: name, kind: kExternalTable, initial: initial,255             maximum: maximum};256    this.imports.push(o);257  }258  addExport(name, index) {259    this.exports.push({name: name, kind: kExternalFunction, index: index});260    return this;261  }262  addExportOfKind(name, kind, index) {263    this.exports.push({name: name, kind: kind, index: index});264    return this;265  }266  addDataSegment(addr, data, is_global = false) {267    this.segments.push({addr: addr, data: data, is_global: is_global});268    return this.segments.length - 1;269  }270  exportMemoryAs(name) {271    this.exports.push({name: name, kind: kExternalMemory, index: 0});272  }273  addFunctionTableInit(base, is_global, array, is_import = false) {274    this.function_table_inits.push({base: base, is_global: is_global,275                                    array: array});276    if (!is_global) {277      var length = base + array.length;278      if (length > this.function_table_length && !is_import) {279        this.function_table_length = length;280      }281    }282    return this;283  }284  appendToTable(array) {285    for (let n of array) {286      if (typeof n != 'number')287        throw new Error('invalid table (entries have to be numbers): ' + array);288    }289    return this.addFunctionTableInit(this.function_table.length, false, array);290  }291  setFunctionTableLength(length) {292    this.function_table_length = length;293    return this;294  }295  setName(name) {296    this.name = name;297    return this;298  }299  toArray(debug = false) {300    let binary = new Binary;301    let wasm = this;302    // Add header303    binary.emit_header();304    // Add type section305    if (wasm.types.length > 0) {306      if (debug) print("emitting types @ " + binary.length);307      binary.emit_section(kTypeSectionCode, section => {308        section.emit_u32v(wasm.types.length);309        for (let type of wasm.types) {310          section.emit_u8(kWasmFunctionTypeForm);311          section.emit_u32v(type.params.length);312          for (let param of type.params) {313            section.emit_u8(param);314          }315          section.emit_u32v(type.results.length);316          for (let result of type.results) {317            section.emit_u8(result);318          }319        }320      });321    }322    // Add imports section323    if (wasm.imports.length > 0) {324      if (debug) print("emitting imports @ " + binary.length);325      binary.emit_section(kImportSectionCode, section => {326        section.emit_u32v(wasm.imports.length);327        for (let imp of wasm.imports) {328          section.emit_string(imp.module);329          section.emit_string(imp.name || '');330          section.emit_u8(imp.kind);331          if (imp.kind == kExternalFunction) {332            section.emit_u32v(imp.type);333          } else if (imp.kind == kExternalGlobal) {334            section.emit_u32v(imp.type);335            section.emit_u8(imp.mutable);336          } else if (imp.kind == kExternalMemory) {337            var has_max = (typeof imp.maximum) != "undefined";338            section.emit_u8(has_max ? 1 : 0); // flags339            section.emit_u32v(imp.initial); // initial340            if (has_max) section.emit_u32v(imp.maximum); // maximum341          } else if (imp.kind == kExternalTable) {342            section.emit_u8(kWasmAnyFunctionTypeForm);343            var has_max = (typeof imp.maximum) != "undefined";344            section.emit_u8(has_max ? 1 : 0); // flags345            section.emit_u32v(imp.initial); // initial346            if (has_max) section.emit_u32v(imp.maximum); // maximum347          } else {348            throw new Error("unknown/unsupported import kind " + imp.kind);349          }350        }351      });352    }353    // Add functions declarations354    if (wasm.functions.length > 0) {355      if (debug) print("emitting function decls @ " + binary.length);356      binary.emit_section(kFunctionSectionCode, section => {357        section.emit_u32v(wasm.functions.length);358        for (let func of wasm.functions) {359          section.emit_u32v(func.type_index);360        }361      });362    }363    // Add function_table.364    if (wasm.function_table_length > 0) {365      if (debug) print("emitting table @ " + binary.length);366      binary.emit_section(kTableSectionCode, section => {367        section.emit_u8(1);  // one table entry368        section.emit_u8(kWasmAnyFunctionTypeForm);369        section.emit_u8(1);370        section.emit_u32v(wasm.function_table_length);371        section.emit_u32v(wasm.function_table_length);372      });373    }374    // Add memory section375    if (wasm.memory !== undefined) {376      if (debug) print("emitting memory @ " + binary.length);377      binary.emit_section(kMemorySectionCode, section => {378        section.emit_u8(1);  // one memory entry379        const has_max = wasm.memory.max !== undefined;380        section.emit_u32v(has_max ? kResizableMaximumFlag : 0);381        section.emit_u32v(wasm.memory.min);382        if (has_max) section.emit_u32v(wasm.memory.max);383      });384    }385    // Add global section.386    if (wasm.globals.length > 0) {387      if (debug) print ("emitting globals @ " + binary.length);388      binary.emit_section(kGlobalSectionCode, section => {389        section.emit_u32v(wasm.globals.length);390        for (let global of wasm.globals) {391          section.emit_u8(global.type);392          section.emit_u8(global.mutable);393          if ((typeof global.init_index) == "undefined") {394            // Emit a constant initializer.395            switch (global.type) {396            case kWasmI32:397              section.emit_u8(kExprI32Const);398              section.emit_u32v(global.init);399              break;400            case kWasmI64:401              section.emit_u8(kExprI64Const);402              section.emit_u32v(global.init);403              break;404            case kWasmF32:405              section.emit_u8(kExprF32Const);406              f32_view[0] = global.init;407              section.emit_u8(byte_view[0]);408              section.emit_u8(byte_view[1]);409              section.emit_u8(byte_view[2]);410              section.emit_u8(byte_view[3]);411              break;412            case kWasmF64:413              section.emit_u8(kExprF64Const);414              f64_view[0] = global.init;415              section.emit_u8(byte_view[0]);416              section.emit_u8(byte_view[1]);417              section.emit_u8(byte_view[2]);418              section.emit_u8(byte_view[3]);419              section.emit_u8(byte_view[4]);420              section.emit_u8(byte_view[5]);421              section.emit_u8(byte_view[6]);422              section.emit_u8(byte_view[7]);423              break;424            }425          } else {426            // Emit a global-index initializer.427            section.emit_u8(kExprGetGlobal);428            section.emit_u32v(global.init_index);429          }430          section.emit_u8(kExprEnd);  // end of init expression431        }432      });433    }434    // Add export table.435    var mem_export = (wasm.memory !== undefined && wasm.memory.exp);436    var exports_count = wasm.exports.length + (mem_export ? 1 : 0);437    if (exports_count > 0) {438      if (debug) print("emitting exports @ " + binary.length);439      binary.emit_section(kExportSectionCode, section => {440        section.emit_u32v(exports_count);441        for (let exp of wasm.exports) {442          section.emit_string(exp.name);443          section.emit_u8(exp.kind);444          section.emit_u32v(exp.index);445        }446        if (mem_export) {447          section.emit_string("memory");448          section.emit_u8(kExternalMemory);449          section.emit_u8(0);450        }451      });452    }453    // Add start function section.454    if (wasm.start_index !== undefined) {455      if (debug) print("emitting start function @ " + binary.length);456      binary.emit_section(kStartSectionCode, section => {457        section.emit_u32v(wasm.start_index);458      });459    }460    // Add table elements.461    if (wasm.function_table_inits.length > 0) {462      if (debug) print("emitting table @ " + binary.length);463      binary.emit_section(kElementSectionCode, section => {464        var inits = wasm.function_table_inits;465        section.emit_u32v(inits.length);466        for (let init of inits) {467          section.emit_u8(0); // table index468          if (init.is_global) {469            section.emit_u8(kExprGetGlobal);470          } else {471            section.emit_u8(kExprI32Const);472          }473          section.emit_u32v(init.base);474          section.emit_u8(kExprEnd);475          section.emit_u32v(init.array.length);476          for (let index of init.array) {477            section.emit_u32v(index);478          }479        }480      });481    }482    // Add exceptions.483    if (wasm.exceptions.length > 0) {484      if (debug) print("emitting exceptions @ " + binary.length);485      binary.emit_section(kExceptionSectionCode, section => {486        section.emit_u32v(wasm.exceptions.length);487        for (let type of wasm.exceptions) {488          section.emit_u32v(type.params.length);489          for (let param of type.params) {490            section.enit_u8(param);491          }492        }493      });494    }495    // Add function bodies.496    if (wasm.functions.length > 0) {497      // emit function bodies498      if (debug) print("emitting code @ " + binary.length);499      binary.emit_section(kCodeSectionCode, section => {500        section.emit_u32v(wasm.functions.length);501        for (let func of wasm.functions) {502          // Function body length will be patched later.503          let local_decls = [];504          let l = func.locals;505          if (l !== undefined) {506            let local_decls_count = 0;507            if (l.i32_count > 0) {508              local_decls.push({count: l.i32_count, type: kWasmI32});509            }510            if (l.i64_count > 0) {511              local_decls.push({count: l.i64_count, type: kWasmI64});512            }513            if (l.f32_count > 0) {514              local_decls.push({count: l.f32_count, type: kWasmF32});515            }516            if (l.f64_count > 0) {517              local_decls.push({count: l.f64_count, type: kWasmF64});518            }519          }520          let header = new Binary;521          header.emit_u32v(local_decls.length);522          for (let decl of local_decls) {523            header.emit_u32v(decl.count);524            header.emit_u8(decl.type);525          }526          section.emit_u32v(header.length + func.body.length);527          section.emit_bytes(header);528          section.emit_bytes(func.body);529        }530      });531    }532    // Add data segments.533    if (wasm.segments.length > 0) {534      if (debug) print("emitting data segments @ " + binary.length);535      binary.emit_section(kDataSectionCode, section => {536        section.emit_u32v(wasm.segments.length);537        for (let seg of wasm.segments) {538          section.emit_u8(0);  // linear memory index 0539          if (seg.is_global) {540            // initializer is a global variable541            section.emit_u8(kExprGetGlobal);542            section.emit_u32v(seg.addr);543          } else {544            // initializer is a constant545            section.emit_u8(kExprI32Const);546            section.emit_u32v(seg.addr);547          }548          section.emit_u8(kExprEnd);549          section.emit_u32v(seg.data.length);550          section.emit_bytes(seg.data);551        }552      });553    }554    // Add any explicitly added sections555    for (let exp of wasm.explicit) {556      if (debug) print("emitting explicit @ " + binary.length);557      binary.emit_bytes(exp);558    }559    // Add names.560    let num_function_names = 0;561    let num_functions_with_local_names = 0;562    for (let func of wasm.functions) {563      if (func.name !== undefined) ++num_function_names;564      if (func.numLocalNames() > 0) ++num_functions_with_local_names;565    }566    if (num_function_names > 0 || num_functions_with_local_names > 0 ||567        wasm.name !== undefined) {568      if (debug) print('emitting names @ ' + binary.length);569      binary.emit_section(kUnknownSectionCode, section => {570        section.emit_string('name');571        // Emit module name.572        if (wasm.name !== undefined) {573          section.emit_section(kModuleNameCode, name_section => {574            name_section.emit_string(wasm.name);575          });576        }577        // Emit function names.578        if (num_function_names > 0) {579          section.emit_section(kFunctionNamesCode, name_section => {580            name_section.emit_u32v(num_function_names);581            for (let func of wasm.functions) {582              if (func.name === undefined) continue;583              name_section.emit_u32v(func.index);584              name_section.emit_string(func.name);585            }586          });587        }588        // Emit local names.589        if (num_functions_with_local_names > 0) {590          section.emit_section(kLocalNamesCode, name_section => {591            name_section.emit_u32v(num_functions_with_local_names);592            for (let func of wasm.functions) {593              if (func.numLocalNames() == 0) continue;594              name_section.emit_u32v(func.index);595              name_section.emit_u32v(func.numLocalNames());596              for (let i = 0; i < func.local_names.length; ++i) {597                if (func.local_names[i] === undefined) continue;598                name_section.emit_u32v(i);599                name_section.emit_string(func.local_names[i]);600              }601            }602          });603        }604      });605    }606    return binary;607  }608  toBuffer(debug = false) {609    let bytes = this.toArray(debug);610    let buffer = new ArrayBuffer(bytes.length);611    let view = new Uint8Array(buffer);612    for (let i = 0; i < bytes.length; i++) {...

wasm-module-builder.js

Source:wasm-module-builder.js

...19    this.push((val >> 8) & 0xff);20    this.push((val >> 16) & 0xff);21    this.push((val >> 24) & 0xff);22  }23  emit_u32v(val) {24    while (true) {25      let v = val & 0xff;26      val = val >>> 7;27      if (val == 0) {28        this.push(v);29        break;30      }31      this.push(v | 0x80);32    }33  }34  emit_bytes(data) {35    for (let i = 0; i < data.length; i++) {36      this.push(data[i] & 0xff);37    }38  }39  emit_string(string) {40    // When testing illegal names, we pass a byte array directly.41    if (string instanceof Array) {42      this.emit_u32v(string.length);43      this.emit_bytes(string);44      return;45    }46    // This is the hacky way to convert a JavaScript string to a UTF8 encoded47    // string only containing single-byte characters.48    let string_utf8 = unescape(encodeURIComponent(string));49    this.emit_u32v(string_utf8.length);50    for (let i = 0; i < string_utf8.length; i++) {51      this.emit_u8(string_utf8.charCodeAt(i));52    }53  }54  emit_header() {55    this.push(kWasmH0, kWasmH1, kWasmH2, kWasmH3,56              kWasmV0, kWasmV1, kWasmV2, kWasmV3);57  }58  emit_section(section_code, content_generator) {59    // Emit section name.60    this.emit_u8(section_code);61    // Emit the section to a temporary buffer: its full length isn't know yet.62    let section = new Binary;63    content_generator(section);64    // Emit section length.65    this.emit_u32v(section.length);66    // Copy the temporary buffer.67    for (const sectionByte of section) {68      this.push(sectionByte);69    }70  }71}72class WasmFunctionBuilder {73  constructor(module, name, type_index) {74    this.module = module;75    this.name = name;76    this.type_index = type_index;77    this.body = [];78  }79  exportAs(name) {80    this.module.addExport(name, this.index);81    return this;82  }83  exportFunc() {84    this.exportAs(this.name);85    return this;86  }87  addBody(body) {88    for (let b of body) {89      if (typeof b != 'number')90        throw new Error('invalid body (entries have to be numbers): ' + body);91    }92    this.body = body.slice();93    // Automatically add the end for the function block to the body.94    this.body.push(kExprEnd);95    return this;96  }97  addLocals(locals) {98    this.locals = locals;99    return this;100  }101  end() {102    this.body.push(kExprEnd);103    return this.module;104  }105}106class WasmGlobalBuilder {107  constructor(module, type, mutable) {108    this.module = module;109    this.type = type;110    this.mutable = mutable;111    this.init = 0;112  }113  exportAs(name) {114    this.module.exports.push({name: name, kind: kExternalGlobal,115                              index: this.index});116    return this;117  }118}119class WasmModuleBuilder {120  constructor() {121    this.types = [];122    this.imports = [];123    this.exports = [];124    this.globals = [];125    this.functions = [];126    this.function_table = [];127    this.function_table_length = 0;128    this.function_table_inits = [];129    this.segments = [];130    this.explicit = [];131    this.num_imported_funcs = 0;132    this.num_imported_globals = 0;133    return this;134  }135  addStart(start_index) {136    this.start_index = start_index;137    return this;138  }139  addMemory(min, max, exp) {140    this.memory = {min: min, max: max, exp: exp};141    return this;142  }143  addExplicitSection(bytes) {144    this.explicit.push(bytes);145    return this;146  }147  stringToBytes(name) {148    var result = new Binary();149    result.emit_u32v(name.length);150    for (var i = 0; i < name.length; i++) {151      result.emit_u8(name.charCodeAt(i));152    }153    return result;154  }155  addCustomSection(name, bytes) {156    name = this.stringToBytes(name);157    var length = new Binary();158    length.emit_u32v(name.length + bytes.length);159    this.explicit.push([0, ...length, ...name, ...bytes]);160  }161  addType(type) {162    // TODO: canonicalize types?163    this.types.push(type);164    return this.types.length - 1;165  }166  addGlobal(local_type, mutable) {167    let glob = new WasmGlobalBuilder(this, local_type, mutable);168    glob.index = this.globals.length + this.num_imported_globals;169    this.globals.push(glob);170    return glob;171  }172  addFunction(name, type) {173    let type_index = (typeof type) == "number" ? type : this.addType(type);174    let func = new WasmFunctionBuilder(this, name, type_index);175    func.index = this.functions.length + this.num_imported_funcs;176    this.functions.push(func);177    return func;178  }179  addImport(module = "", name, type) {180    let type_index = (typeof type) == "number" ? type : this.addType(type);181    this.imports.push({module: module, name: name, kind: kExternalFunction,182                       type: type_index});183    return this.num_imported_funcs++;184  }185  addImportedGlobal(module = "", name, type) {186    let o = {module: module, name: name, kind: kExternalGlobal, type: type,187             mutable: false}188    this.imports.push(o);189    return this.num_imported_globals++;190  }191  addImportedMemory(module = "", name, initial = 0, maximum) {192    let o = {module: module, name: name, kind: kExternalMemory,193             initial: initial, maximum: maximum};194    this.imports.push(o);195    return this;196  }197  addImportedTable(module = "", name, initial, maximum) {198    let o = {module: module, name: name, kind: kExternalTable, initial: initial,199             maximum: maximum};200    this.imports.push(o);201  }202  addExport(name, index) {203    this.exports.push({name: name, kind: kExternalFunction, index: index});204    return this;205  }206  addExportOfKind(name, kind, index) {207    this.exports.push({name: name, kind: kind, index: index});208    return this;209  }210  addDataSegment(addr, data, is_global = false) {211    this.segments.push({addr: addr, data: data, is_global: is_global});212    return this.segments.length - 1;213  }214  exportMemoryAs(name) {215    this.exports.push({name: name, kind: kExternalMemory, index: 0});216  }217  addFunctionTableInit(base, is_global, array, is_import = false) {218    this.function_table_inits.push({base: base, is_global: is_global,219                                    array: array});220    if (!is_global) {221      var length = base + array.length;222      if (length > this.function_table_length && !is_import) {223        this.function_table_length = length;224      }225    }226    return this;227  }228  appendToTable(array) {229    for (let n of array) {230      if (typeof n != 'number')231        throw new Error('invalid table (entries have to be numbers): ' + array);232    }233    return this.addFunctionTableInit(this.function_table.length, false, array);234  }235  setFunctionTableLength(length) {236    this.function_table_length = length;237    return this;238  }239  toArray(debug = false) {240    let binary = new Binary;241    let wasm = this;242    // Add header243    binary.emit_header();244    // Add type section245    if (wasm.types.length > 0) {246      if (debug) print("emitting types @ " + binary.length);247      binary.emit_section(kTypeSectionCode, section => {248        section.emit_u32v(wasm.types.length);249        for (let type of wasm.types) {250          section.emit_u8(kWasmFunctionTypeForm);251          section.emit_u32v(type.params.length);252          for (let param of type.params) {253            section.emit_u8(param);254          }255          section.emit_u32v(type.results.length);256          for (let result of type.results) {257            section.emit_u8(result);258          }259        }260      });261    }262    // Add imports section263    if (wasm.imports.length > 0) {264      if (debug) print("emitting imports @ " + binary.length);265      binary.emit_section(kImportSectionCode, section => {266        section.emit_u32v(wasm.imports.length);267        for (let imp of wasm.imports) {268          section.emit_string(imp.module);269          section.emit_string(imp.name || '');270          section.emit_u8(imp.kind);271          if (imp.kind == kExternalFunction) {272            section.emit_u32v(imp.type);273          } else if (imp.kind == kExternalGlobal) {274            section.emit_u32v(imp.type);275            section.emit_u8(imp.mutable);276          } else if (imp.kind == kExternalMemory) {277            var has_max = (typeof imp.maximum) != "undefined";278            section.emit_u8(has_max ? 1 : 0); // flags279            section.emit_u32v(imp.initial); // initial280            if (has_max) section.emit_u32v(imp.maximum); // maximum281          } else if (imp.kind == kExternalTable) {282            section.emit_u8(kWasmAnyFunctionTypeForm);283            var has_max = (typeof imp.maximum) != "undefined";284            section.emit_u8(has_max ? 1 : 0); // flags285            section.emit_u32v(imp.initial); // initial286            if (has_max) section.emit_u32v(imp.maximum); // maximum287          } else {288            throw new Error("unknown/unsupported import kind " + imp.kind);289          }290        }291      });292    }293    // Add functions declarations294    let num_function_names = 0;295    let names = false;296    if (wasm.functions.length > 0) {297      if (debug) print("emitting function decls @ " + binary.length);298      binary.emit_section(kFunctionSectionCode, section => {299        section.emit_u32v(wasm.functions.length);300        for (let func of wasm.functions) {301          if (func.name !== undefined) {302            ++num_function_names;303          }304          section.emit_u32v(func.type_index);305        }306      });307    }308    // Add function_table.309    if (wasm.function_table_length > 0) {310      if (debug) print("emitting table @ " + binary.length);311      binary.emit_section(kTableSectionCode, section => {312        section.emit_u8(1);  // one table entry313        section.emit_u8(kWasmAnyFunctionTypeForm);314        section.emit_u8(1);315        section.emit_u32v(wasm.function_table_length);316        section.emit_u32v(wasm.function_table_length);317      });318    }319    // Add memory section320    if (wasm.memory !== undefined) {321      if (debug) print("emitting memory @ " + binary.length);322      binary.emit_section(kMemorySectionCode, section => {323        section.emit_u8(1);  // one memory entry324        const has_max = wasm.memory.max !== undefined;325        section.emit_u32v(has_max ? kResizableMaximumFlag : 0);326        section.emit_u32v(wasm.memory.min);327        if (has_max) section.emit_u32v(wasm.memory.max);328      });329    }330    // Add global section.331    if (wasm.globals.length > 0) {332      if (debug) print ("emitting globals @ " + binary.length);333      binary.emit_section(kGlobalSectionCode, section => {334        section.emit_u32v(wasm.globals.length);335        for (let global of wasm.globals) {336          section.emit_u8(global.type);337          section.emit_u8(global.mutable);338          if ((typeof global.init_index) == "undefined") {339            // Emit a constant initializer.340            switch (global.type) {341            case kWasmI32:342              section.emit_u8(kExprI32Const);343              section.emit_u32v(global.init);344              break;345            case kWasmI64:346              section.emit_u8(kExprI64Const);347              section.emit_u32v(global.init);348              break;349            case kWasmF32:350              section.emit_u8(kExprF32Const);351              f32_view[0] = global.init;352              section.emit_u8(byte_view[0]);353              section.emit_u8(byte_view[1]);354              section.emit_u8(byte_view[2]);355              section.emit_u8(byte_view[3]);356              break;357            case kWasmF64:358              section.emit_u8(kExprF64Const);359              f64_view[0] = global.init;360              section.emit_u8(byte_view[0]);361              section.emit_u8(byte_view[1]);362              section.emit_u8(byte_view[2]);363              section.emit_u8(byte_view[3]);364              section.emit_u8(byte_view[4]);365              section.emit_u8(byte_view[5]);366              section.emit_u8(byte_view[6]);367              section.emit_u8(byte_view[7]);368              break;369            }370          } else {371            // Emit a global-index initializer.372            section.emit_u8(kExprGetGlobal);373            section.emit_u32v(global.init_index);374          }375          section.emit_u8(kExprEnd);  // end of init expression376        }377      });378    }379    // Add export table.380    var mem_export = (wasm.memory !== undefined && wasm.memory.exp);381    var exports_count = wasm.exports.length + (mem_export ? 1 : 0);382    if (exports_count > 0) {383      if (debug) print("emitting exports @ " + binary.length);384      binary.emit_section(kExportSectionCode, section => {385        section.emit_u32v(exports_count);386        for (let exp of wasm.exports) {387          section.emit_string(exp.name);388          section.emit_u8(exp.kind);389          section.emit_u32v(exp.index);390        }391        if (mem_export) {392          section.emit_string("memory");393          section.emit_u8(kExternalMemory);394          section.emit_u8(0);395        }396      });397    }398    // Add start function section.399    if (wasm.start_index !== undefined) {400      if (debug) print("emitting start function @ " + binary.length);401      binary.emit_section(kStartSectionCode, section => {402        section.emit_u32v(wasm.start_index);403      });404    }405    // Add table elements.406    if (wasm.function_table_inits.length > 0) {407      if (debug) print("emitting table @ " + binary.length);408      binary.emit_section(kElementSectionCode, section => {409        var inits = wasm.function_table_inits;410        section.emit_u32v(inits.length);411        for (let init of inits) {412          section.emit_u8(0); // table index413          if (init.is_global) {414            section.emit_u8(kExprGetGlobal);415          } else {416            section.emit_u8(kExprI32Const);417          }418          section.emit_u32v(init.base);419          section.emit_u8(kExprEnd);420          section.emit_u32v(init.array.length);421          for (let index of init.array) {422            section.emit_u32v(index);423          }424        }425      });426    }427    // Add function bodies.428    if (wasm.functions.length > 0) {429      // emit function bodies430      if (debug) print("emitting code @ " + binary.length);431      binary.emit_section(kCodeSectionCode, section => {432        section.emit_u32v(wasm.functions.length);433        for (let func of wasm.functions) {434          // Function body length will be patched later.435          let local_decls = [];436          let l = func.locals;437          if (l !== undefined) {438            let local_decls_count = 0;439            if (l.i32_count > 0) {440              local_decls.push({count: l.i32_count, type: kWasmI32});441            }442            if (l.i64_count > 0) {443              local_decls.push({count: l.i64_count, type: kWasmI64});444            }445            if (l.f32_count > 0) {446              local_decls.push({count: l.f32_count, type: kWasmF32});447            }448            if (l.f64_count > 0) {449              local_decls.push({count: l.f64_count, type: kWasmF64});450            }451          }452          let header = new Binary;453          header.emit_u32v(local_decls.length);454          for (let decl of local_decls) {455            header.emit_u32v(decl.count);456            header.emit_u8(decl.type);457          }458          section.emit_u32v(header.length + func.body.length);459          section.emit_bytes(header);460          section.emit_bytes(func.body);461        }462      });463    }464    // Add data segments.465    if (wasm.segments.length > 0) {466      if (debug) print("emitting data segments @ " + binary.length);467      binary.emit_section(kDataSectionCode, section => {468        section.emit_u32v(wasm.segments.length);469        for (let seg of wasm.segments) {470          section.emit_u8(0);  // linear memory index 0471          if (seg.is_global) {472            // initializer is a global variable473            section.emit_u8(kExprGetGlobal);474            section.emit_u32v(seg.addr);475          } else {476            // initializer is a constant477            section.emit_u8(kExprI32Const);478            section.emit_u32v(seg.addr);479          }480          section.emit_u8(kExprEnd);481          section.emit_u32v(seg.data.length);482          section.emit_bytes(seg.data);483        }484      });485    }486    // Add any explicitly added sections487    for (let exp of wasm.explicit) {488      if (debug) print("emitting explicit @ " + binary.length);489      binary.emit_bytes(exp);490    }491    // Add function names.492    if (num_function_names > 0) {493      if (debug) print('emitting names @ ' + binary.length);494      binary.emit_section(kUnknownSectionCode, section => {495        section.emit_string('name');496        section.emit_section(kFunctionNamesCode, name_section => {497          name_section.emit_u32v(num_function_names);498          for (let func of wasm.functions) {499            if (func.name === undefined) continue;500            name_section.emit_u32v(func.index);501            name_section.emit_string(func.name);502          }503        });504      });505    }506    return binary;507  }508  toBuffer(debug = false) {509    let bytes = this.toArray(debug);510    let buffer = new ArrayBuffer(bytes.length);511    let view = new Uint8Array(buffer);512    for (let i = 0; i < bytes.length; i++) {513      let val = bytes[i];514      if ((typeof val) == "string") val = val.charCodeAt(0);...

Using AI Code Generation

1var wpt = require('wpt');2wpt.emit_u32v(1);3wpt.emit_u32v(2);4wpt.emit_u32v(3);5wpt.emit_u32v(4);6wpt.emit_u32v(5);7wpt.emit_u32v(6);8wpt.emit_u32v(7);9wpt.emit_u32v(8);10wpt.emit_u32v(9);11wpt.emit_u32v(10);12wpt.emit_u32v(11);13wpt.emit_u32v(12);14wpt.emit_u32v(13);15wpt.emit_u32v(14);16wpt.emit_u32v(15);17wpt.emit_u32v(16);18wpt.emit_u32v(17);19wpt.emit_u32v(18);20wpt.emit_u32v(19);21wpt.emit_u32v(20);22wpt.emit_u32v(21);23wpt.emit_u32v(22);24wpt.emit_u32v(23);25wpt.emit_u32v(24);26wpt.emit_u32v(25);27wpt.emit_u32v(26);28wpt.emit_u32v(27);29wpt.emit_u32v(28);30wpt.emit_u32v(29);31wpt.emit_u32v(30);32wpt.emit_u32v(31);33wpt.emit_u32v(32);34wpt.emit_u32v(33);35wpt.emit_u32v(34);36wpt.emit_u32v(35);37wpt.emit_u32v(36);38wpt.emit_u32v(37);39wpt.emit_u32v(38);40wpt.emit_u32v(39);41wpt.emit_u32v(40);42wpt.emit_u32v(41);43wpt.emit_u32v(42);44wpt.emit_u32v(43);45wpt.emit_u32v(44);46wpt.emit_u32v(45);47wpt.emit_u32v(46);48wpt.emit_u32v(47);49wpt.emit_u32v(48);50wpt.emit_u32v(49);51wpt.emit_u32v(50);52wpt.emit_u32v(51);53wpt.emit_u32v(52);54wpt.emit_u32v(53);55wpt.emit_u32v(54);

Using AI Code Generation

1var wpt = require('wpt');2var w = new wpt();3w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);4var wpt = require('wpt');5var w = new wpt();6w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);7var wpt = require('wpt');8var w = new wpt();9w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);10var wpt = require('wpt');11var w = new wpt();12w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);13var wpt = require('wpt');14var w = new wpt();15w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);16var wpt = require('wpt');17var w = new wpt();18w.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10,

Using AI Code Generation

1var wpt = require('wpt');2var wpt = new wpt.Wpt();3wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);4wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);5wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);6wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);7wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);8wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);9wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);10wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);11wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);12wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);13wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);14var wpt = require('wpt');15var wpt = new wpt.Wpt();16wpt.emit_u32v(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);17wpt.emit_u32v(

Using AI Code Generation

1var wpt = require('wiring-pi-test');2wpt.setup('wpi');3var pin = 1;4wpt.pinMode(pin, wpt.OUTPUT);5wpt.emit_u32v(pin, 0x00000000, 0x00000000, 0x00000000, 0x00000000);6var wpi = require('wiring-pi');7var u32v = require('u32v');8var u32vModule = require('u32v/build/Release/u32v');9var emit_u32v = function(pin, data0, data1, data2, data3) {10    var data = u32vModule.u32v(data0, data1, data2, data3);11    wpi.wiringPiI2CWriteReg32(pin, 0, data);12};13module.exports = {14};15"dependencies": {16}17var wpi = require('wiring-pi');18var u32v = require('u32v');19var u32vModule = require('u32v/build/Release/u32v');20var emit_u32v = function(pin, data0, data1, data2, data3) {21    var data = u32vModule.u32v(data0, data1, data2, data3);22    wpi.wiringPiI2CWriteReg32(pin, 0, data);23};24module.exports = {25};26var wpt = require('wiring-pi-test');27wpt.setup('wpi');28var pin = 1;29wpt.pinMode(pin, wpt.OUTPUT);30wpt.emit_u32v(pin

Using AI Code Generation

1var wpt = require('wiring-pi').wiringPiI2CSetupInterface(0x23, 0x01);2wiringPiI2CWriteReg8(wpt, 0x80, 0x03);3wiringPiI2CWriteReg8(wpt, 0x81, 0x02);4wiringPiI2CWriteReg8(wpt, 0x82, 0x01);5wiringPiI2CWriteReg8(wpt, 0x8A, 0xFF);6wiringPiI2CWriteReg8(wpt, 0x8B, 0xFF);7wiringPiI2CWriteReg8(wpt, 0x8C, 0xFF);8wiringPiI2CWriteReg8(wpt, 0x00, 0x00);9wiringPiI2CWriteReg8(wpt, 0x01, 0x00);10wiringPiI2CWriteReg8(wpt, 0x02, 0x00);11var wpt = require('wiring-pi').wiringPiI2CSetupInterface(0x23, 0x01);12wiringPiI2CWriteReg8(wpt, 0x80, 0x03);13wiringPiI2CWriteReg8(wpt, 0x81, 0x02);14wiringPiI2CWriteReg8(wpt, 0x82, 0x01);15wiringPiI2CWriteReg8(wpt, 0x8A, 0xFF);16wiringPiI2CWriteReg8(wpt, 0x8B, 0xFF);17wiringPiI2CWriteReg8(wpt, 0x8C, 0xFF);18wiringPiI2CWriteReg8(wpt, 0x00, 0x00);19wiringPiI2CWriteReg8(wpt, 0x01, 0x00);20wiringPiI2CWriteReg8(wpt, 0x02, 0x00);21var wpt = require('

Using AI Code Generation

1var wpt = require('wpt');2var wptu32 = new wpt.U32v();3wptu32.emit_u32v(1234);4wptu32.emit_u32v(1234567890);5wptu32.emit_u32v(0);6wptu32.emit_u32v(4294967295);7wptu32.emit_u32v(2147483648);8wptu32.emit_u32v(2147483647);9wptu32.emit_u32v(2147483649);10wptu32.emit_u32v(4294967296);11wptu32.emit_u32v(4294967297);12wptu32.emit_u32v(9223372036854775807);13wptu32.emit_u32v(9223372036854775808);14wptu32.emit_u32v(18446744073709551615);15wptu32.emit_u32v(18446744073709551616);16wptu32.emit_u32v(18446744073709551617);17wptu32.emit_u32v(18446744073709551618);18wptu32.emit_u32v(18446744073709551619);19wptu32.emit_u32v(18446744073709551620);20wptu32.emit_u32v(18446744073709551621);21wptu32.emit_u32v(18446744073709551622);22wptu32.emit_u32v(18446744073709551623);23wptu32.emit_u32v(18446744073709551624);24wptu32.emit_u32v(18446744073709551625);25wptu32.emit_u32v(18446744073709551626);26wptu32.emit_u32v(18446744073709551627);27wptu32.emit_u32v(18446744073709551628);28wptu32.emit_u32v(18446744073709551629);29wptu32.emit_u32v(18446744073709551630);30wptu32.emit_u32v(18446744073709551631);31wptu32.emit_u32v(18446744073709551632);32wptu32.emit_u32v(184467440737095

Using AI Code Generation

1emit_u32v(0x00000001, 4);2emit_u32v(0x00000002, 2);3emit_u32v(0x00000003, 1);4emit_u32v(0x00000004, 2);5emit_u32v(0x00000005, 4);6emit_u32v(0x00000006, 1);7emit_u32v(0x00000007, 4);8emit_u32v(0x00000008, 2);9emit_u32v(0x00000009, 1);10emit_u32v(0x0000000a, 2);11emit_u32v(0x0000000b, 4);

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.