diff options
Diffstat (limited to 'node_modules/@webassemblyjs/helper-module-context/src')
| -rw-r--r-- | node_modules/@webassemblyjs/helper-module-context/src/index.js | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/node_modules/@webassemblyjs/helper-module-context/src/index.js b/node_modules/@webassemblyjs/helper-module-context/src/index.js deleted file mode 100644 index e3171de..0000000 --- a/node_modules/@webassemblyjs/helper-module-context/src/index.js +++ /dev/null @@ -1,287 +0,0 @@ -// TODO(sven): add flow in here - -import { isSignature, isNumberLiteral } from "@webassemblyjs/ast"; -import { assert } from "mamacro"; - -export function moduleContextFromModuleAST(m) { - const moduleContext = new ModuleContext(); - - assert(m.type === "Module"); - - m.fields.forEach(field => { - switch (field.type) { - case "Start": { - moduleContext.setStart(field.index); - break; - } - case "TypeInstruction": { - moduleContext.addType(field); - break; - } - case "Func": { - moduleContext.addFunction(field); - break; - } - case "Global": { - moduleContext.defineGlobal(field); - break; - } - case "ModuleImport": { - switch (field.descr.type) { - case "GlobalType": { - moduleContext.importGlobal( - field.descr.valtype, - field.descr.mutability - ); - break; - } - case "Memory": { - moduleContext.addMemory( - field.descr.limits.min, - field.descr.limits.max - ); - break; - } - case "FuncImportDescr": { - moduleContext.importFunction(field.descr); - break; - } - - case "Table": { - // FIXME(sven): not implemented yet - break; - } - - default: - throw new Error( - "Unsupported ModuleImport of type " + - JSON.stringify(field.descr.type) - ); - } - break; - } - case "Memory": { - moduleContext.addMemory(field.limits.min, field.limits.max); - break; - } - } - }); - - return moduleContext; -} - -/** - * Module context for type checking - */ -export class ModuleContext { - constructor() { - this.funcs = []; - this.funcsOffsetByIdentifier = []; - - this.types = []; - - this.globals = []; - this.globalsOffsetByIdentifier = []; - - this.mems = []; - - // Current stack frame - this.locals = []; - this.labels = []; - this.return = []; - - this.debugName = "unknown"; - - this.start = null; - } - - /** - * Set start segment - */ - setStart(index) { - this.start = index.value; - } - - /** - * Get start function - */ - getStart() { - return this.start; - } - - /** - * Reset the active stack frame - */ - newContext(debugName, expectedResult) { - this.locals = []; - this.labels = [expectedResult]; - this.return = expectedResult; - this.debugName = debugName; - } - - /** - * Functions - */ - addFunction(func /*: Func*/) { - // eslint-disable-next-line prefer-const - let { params: args = [], results: result = [] } = func.signature || {}; - - args = args.map(arg => arg.valtype); - - this.funcs.push({ args, result }); - - if (typeof func.name !== "undefined") { - this.funcsOffsetByIdentifier[func.name.value] = this.funcs.length - 1; - } - } - - importFunction(funcimport) { - if (isSignature(funcimport.signature)) { - // eslint-disable-next-line prefer-const - let { params: args, results: result } = funcimport.signature; - args = args.map(arg => arg.valtype); - - this.funcs.push({ args, result }); - } else { - assert(isNumberLiteral(funcimport.signature)); - - const typeId = funcimport.signature.value; - assert(this.hasType(typeId)); - - const signature = this.getType(typeId); - this.funcs.push({ - args: signature.params.map(arg => arg.valtype), - result: signature.results - }); - } - - if (typeof funcimport.id !== "undefined") { - // imports are first, we can assume their index in the array - this.funcsOffsetByIdentifier[funcimport.id.value] = this.funcs.length - 1; - } - } - - hasFunction(index) { - return typeof this.getFunction(index) !== "undefined"; - } - - getFunction(index) { - if (typeof index !== "number") { - throw new Error("getFunction only supported for number index"); - } - - return this.funcs[index]; - } - - getFunctionOffsetByIdentifier(name) { - assert(typeof name === "string"); - - return this.funcsOffsetByIdentifier[name]; - } - - /** - * Labels - */ - addLabel(result) { - this.labels.unshift(result); - } - - hasLabel(index) { - return this.labels.length > index && index >= 0; - } - - getLabel(index) { - return this.labels[index]; - } - - popLabel() { - this.labels.shift(); - } - - /** - * Locals - */ - hasLocal(index) { - return typeof this.getLocal(index) !== "undefined"; - } - - getLocal(index) { - return this.locals[index]; - } - - addLocal(type) { - this.locals.push(type); - } - - /** - * Types - */ - addType(type) { - assert(type.functype.type === "Signature"); - this.types.push(type.functype); - } - - hasType(index) { - return this.types[index] !== undefined; - } - - getType(index) { - return this.types[index]; - } - - /** - * Globals - */ - hasGlobal(index) { - return this.globals.length > index && index >= 0; - } - - getGlobal(index) { - return this.globals[index].type; - } - - getGlobalOffsetByIdentifier(name) { - assert(typeof name === "string"); - - return this.globalsOffsetByIdentifier[name]; - } - - defineGlobal(global /*: Global*/) { - const type = global.globalType.valtype; - const mutability = global.globalType.mutability; - - this.globals.push({ type, mutability }); - - if (typeof global.name !== "undefined") { - this.globalsOffsetByIdentifier[global.name.value] = - this.globals.length - 1; - } - } - - importGlobal(type, mutability) { - this.globals.push({ type, mutability }); - } - - isMutableGlobal(index) { - return this.globals[index].mutability === "var"; - } - - isImmutableGlobal(index) { - return this.globals[index].mutability === "const"; - } - - /** - * Memories - */ - hasMemory(index) { - return this.mems.length > index && index >= 0; - } - - addMemory(min, max) { - this.mems.push({ min, max }); - } - - getMemory(index) { - return this.mems[index]; - } -} |