Crate wasmparser

A simple event-driven library for parsing WebAssembly binary files (or streams).

The parser library reports events as they happen and only stores parsing information for a brief period of time, making it very fast and memory-efficient. The event-driven model, however, has some drawbacks. If you need random access to the entire WebAssembly data-structure, this is not the right library for you. You could however, build such a data-structure using this library.

Modules

• types
  Types relating to type information provided by validation.

Structs

• AliasSectionReader
  A reader for the core alias section of a WebAssembly component.
• BinaryReader
  A binary reader of the WebAssembly structures and types.
• BinaryReaderError
  A binary reader for WebAssembly modules.
• BrTable
  A br_table entries representation.
• CodeSectionReader
  A reader for the code section of a WebAssembly module.
• ComponentAliasSectionReader
  A reader for the alias section of a WebAssembly component.
• ComponentCanonicalSectionReader
  A reader for the canonical section of a WebAssembly component.
• ComponentExport
  Represents an export in a WebAssembly component.
• ComponentExportSectionReader
  A reader for the export section of a WebAssembly component.
• ComponentFuncType
  Represents a type of a function in a WebAssembly component.
• ComponentImport
  Represents an import in a WebAssembly component
• ComponentImportSectionReader
  A reader for the import section of a WebAssembly component.
• ComponentInstanceSectionReader
  A reader for the component instance section of a WebAssembly component.
• ComponentInstantiationArg
  Represents an argument to instantiating a WebAssembly component.
• ComponentStartFunction
  Represents the start function in a WebAssembly component.
• ComponentStartSectionReader
  A reader for the start section of a WebAssembly component.
• ComponentTypeSectionReader
  A reader for the type section of a WebAssembly component.
• ConstExpr
  Represents an initialization expression.
• CoreTypeSectionReader
  A reader for the core type section of a WebAssembly component.
• CustomSectionReader
  A reader for custom sections of a WebAssembly module.
• Data
  Represents a data segment in a core WebAssembly module.
• DataSectionReader
  A reader for the data section of a WebAssembly module.
• Element
  Represents a core WebAssembly element segment.
• ElementItems
  Represents the items of an element segment.
• ElementItemsIterator
  An iterator over element items in an element segment.
• ElementItemsReader
  A reader for element items in an element segment.
• ElementSectionReader
  A reader for the element section of a WebAssembly module.
• Export
  Represents an export in a WebAssembly module.
• ExportSectionReader
  A reader for the export section of a WebAssembly module.
• FuncType
  Represents a type of a function in a WebAssembly module.
• FuncValidator
  Validation context for a WebAssembly function.
• FunctionBody
  Represents a WebAssembly function body.
• FunctionSectionReader
  A reader for the function section of a WebAssembly module.
• Global
  Represents a core WebAssembly global.
• GlobalSectionReader
  A reader for the global section of a WebAssembly module.
• GlobalType
  Represents a global’s type.
• Ieee32
  An IEEE binary32 immediate floating point value, represented as a u32 containing the bit pattern.
• Ieee64
  An IEEE binary64 immediate floating point value, represented as a u64 containing the bit pattern.
• Import
  Represents an import in a WebAssembly module.
• ImportSectionReader
  A reader for the import section of a WebAssembly module.
• IndirectNameMap
  Represents an indirect name map.
• IndirectNaming
  Represents an indirect name in the names custom section.
• IndirectNamingReader
  Represents a reader for indirect names from the names custom section.
• InstanceSectionReader
  A reader for the core instance section of a WebAssembly component.
• InstantiationArg
  Represents an argument to instantiating a WebAssembly module.
• LinkingSectionReader
  A reader for the linking custom section of a WebAssembly module.
• LocalsIterator
  An iterator over locals in a function body.
• LocalsReader
  A reader for a function body’s locals.
• MemoryImmediate
  Represents a memory immediate in a WebAssembly memory instruction.
• MemorySectionReader
  A reader for the memory section of a WebAssembly module.
• MemoryType
  Represents a memory’s type.
• NameMap
  Represents a name map from the names custom section.
• NameSectionReader
  A reader for the name custom section of a WebAssembly module.
• Naming
  Represents a name for an index from the names section.
• NamingReader
  A reader for direct names in the names custom section.
• OperatorsIterator
  An iterator over a function’s operators.
• OperatorsIteratorWithOffsets
  An iterator over a function’s operators with offsets.
• OperatorsReader
  A reader for a core WebAssembly function’s operators.
• Parser
  An incremental parser of a binary WebAssembly module or component.
• ProducersField
  A field from the producers custom section.
• ProducersFieldValue
  Represents a field value in the producers custom section.
• ProducersFieldValuesIterator
  An iterator over fields in the producers custom section.
• ProducersFieldValuesReader
  A reader for fields in the producers custom section.
• ProducersSectionReader
  A reader for the producers custom section of a WebAssembly module.
• Reloc
  Represents a relocation entry.
• RelocSectionReader
  A reader for the relocations custom section of a WebAssembly module.
• SectionIterator
  An iterator over items in a section.
• SectionIteratorLimited
  An iterator over a limited section iterator.
• SingleName
  Represents a single name in the names custom section.
• TableSectionReader
  A reader for the table section of a WebAssembly module.
• TableType
  Represents a table’s type.
• TagSectionReader
  A reader for the tags section of a WebAssembly module.
• TagType
  A tag’s type.
• TypeSectionReader
  A reader for the type section of a WebAssembly module.
• V128
  Represents a 128-bit vector value.
• Validator
  Validator for a WebAssembly binary module or component.
• ValidatorResources
  The implementation of WasmModuleResources used by Validator.
• VariantCase
  Represents a case in a variant type.
• WasmFeatures
  Flags for features that are enabled for validation.
• WasmFuncTypeInputs
  Iterator over the inputs of a Wasm function type.
• WasmFuncTypeOutputs
  Iterator over the outputs of a Wasm function type.

Enums

• Alias
  Represents a core alias for a WebAssembly module.
• BlockType
  Represents a block type.
• CanonicalFunction
  Represents a canonical function in a WebAssembly component.
• CanonicalOption
  Represents options for component functions.
• Chunk
  A successful return payload from Parser::parse.
• ComponentAlias
  Represents an alias in a WebAssembly component.
• ComponentDefinedType
  Represents a defined type in a WebAssembly component.
• ComponentExternalKind
  Represents the kind of an external items of a WebAssembly component.
• ComponentInstance
  Represents an instance in a WebAssembly component.
• ComponentOuterAliasKind
  Represents the kind of an outer alias in a WebAssembly component.
• ComponentType
  Represents a type in a WebAssembly component.
• ComponentTypeDeclaration
  Represents part of a component type declaration in a WebAssembly component.
• ComponentTypeRef
  Represents a reference to a component type.
• ComponentValType
  Represents a value type in a WebAssembly component.
• CoreType
  Represents a core type in a WebAssembly component.
• CustomSectionKind
  Represents known custom section kinds.
• DataKind
  The kind of data segment.
• ElementItem
  Represents an individual item of an element segment.
• ElementKind
  The kind of element segment.
• Encoding
  The supported encoding formats for the parser.
• ExternalKind
  External types as defined here.
• Instance
  Represents an instance of a WebAssembly module.
• InstanceTypeDeclaration
  Represents an instance type declaration in a WebAssembly component.
• InstantiationArgKind
  Represents the kind of an instantiation argument for a core instance.
• LinkingType
  Represents a linking type.
• ModuleTypeDeclaration
  Represents a module type declaration in a WebAssembly component.
• Name
  Represents a name read from the names custom section.
• NameType
  Represents the type of name.
• Operator
  Instructions as defined here.
• OuterAliasKind
  Represents the kind of an outer core alias in a WebAssembly component.
• Payload
  Values that can be parsed from a WebAssembly module or component.
• PrimitiveValType
  Represents a primitive value type.
• RelocType
  Represents a relocation type.
• SectionCode
  Section code as defined here.
• TagKind
  Represents a tag kind.
• Type
  Represents a type in a WebAssembly module.
• TypeBounds
  Represents the type bounds for imports and exports.
• TypeRef
  Represents a reference to a type definition in a WebAssembly module.
• TypeVec
  Represents the vector of types in a component function’s parameters or results.
• ValType
  Represents the types of values in a WebAssembly module.
• ValidPayload
  Possible return values from Validator::payload.

Traits

• SectionReader
  A trait implemented by section readers.
• SectionWithLimitedItems
  Implemented by sections with a limited number of items.
• VisitOperator
  Trait implemented by types that can visit all Operator variants.
• WasmFuncType
  Types that qualify as Wasm function types for validation purposes.
• WasmModuleResources
  Types that qualify as Wasm validation database.

Functions

• validate
  Test whether the given buffer contains a valid WebAssembly module or component, analogous to WebAssembly.validate in the JS API.

Type Definitions

• Result
  The result for BinaryReader operations.
• SIMDLaneIndex
  Represents a SIMD lane index.