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* CodeGenState - Global state for code generation
*
* Centralizes all code generation state in a single static class.
* Eliminates dependency injection complexity and makes debugging easier.
*
* Usage:
* import CodeGenState from "../state/CodeGenState";
* const type = CodeGenState.typeRegistry.get(name);
* if (CodeGenState.isKnownStruct(name)) { ... }
*
* Lifecycle:
* 1. CodeGenerator.generate() calls CodeGenState.reset()
* 2. CodeGenerator sets CodeGenState.generator = this
* 3. All generators/helpers read from CodeGenState directly
* 4. State persists for the duration of one generate() call
*
* SymbolTable ownership:
* CodeGenState owns the single SymbolTable instance. It persists across
* reset() calls (which are per-file). The Transpiler clears it via
* CodeGenState.symbolTable.clear() at the start of each run().
*/
import SymbolTable from "../logic/symbols/SymbolTable";
import ICodeGenSymbols from "../types/ICodeGenSymbols";
import TTypeInfo from "../output/codegen/types/TTypeInfo";
import TParameterInfo from "../output/codegen/types/TParameterInfo";
import IFunctionSignature from "../output/codegen/types/IFunctionSignature";
import ICallbackTypeInfo from "../output/codegen/types/ICallbackTypeInfo";
import ITargetCapabilities from "../output/codegen/types/ITargetCapabilities";
import TOverflowBehavior from "../output/codegen/types/TOverflowBehavior";
import TYPE_WIDTH from "../output/codegen/types/TYPE_WIDTH";
import TypeResolver from "../../utils/TypeResolver";
/**
* Default target capabilities (safe fallback)
*/
const DEFAULT_TARGET: ITargetCapabilities = {
wordSize: 32,
hasLdrexStrex: false,
hasBasepri: false,
};
/**
* Assignment context for overflow behavior tracking (ADR-044)
*/
interface IAssignmentContext {
targetName: string | null;
targetType: string | null;
overflowBehavior: TOverflowBehavior;
}
/**
* Function call graph entry for transitive modification analysis
*/
interface ICallGraphEntry {
callee: string;
paramIndex: number;
argParamName: string;
}
/**
* Global state for code generation.
* All fields are static - import and use directly from any module.
*
* NOTE: All static properties are intentionally mutable (not readonly).
* This class holds session state that is reset via reset() and modified
* during code generation.
*/
export default class CodeGenState {
// ===========================================================================
// GENERATOR REFERENCE (for handler access)
// ===========================================================================
/**
* Reference to the CodeGenerator instance for handlers to call methods.
* Typed as unknown to avoid circular dependencies - handlers cast as needed.
*/
static generator: unknown = null;
// ===========================================================================
// SYMBOL DATA (read-only after initialization)
// ===========================================================================
/** ADR-055: Pre-collected symbol info from CNextResolver + TSymbolInfoAdapter */
static symbols: ICodeGenSymbols | null = null;
/** External symbol table for cross-language interop (C headers).
* Owned by CodeGenState; persists across per-file reset() calls.
* Cleared via symbolTable.clear() at the start of each Transpiler run.
*/
static symbolTable: SymbolTable = new SymbolTable();
/**
* External struct fields from C/C++ headers for initialization analysis.
* Maps struct name -> Set of non-array field names.
* Persists across per-file reset() calls, cleared at start of run.
*/
static externalStructFields: Map<string, Set<string>> = new Map();
// ===========================================================================
// TYPE TRACKING
// ===========================================================================
/**
* Track variable types for bit access, .length, and type inference.
* PRIVATE: Use getVariableTypeInfo()/setVariableTypeInfo() instead.
* This ensures cross-file variables from SymbolTable are also found.
*/
private static typeRegistry: Map<string, TTypeInfo> = new Map();
/** Bug #8: Compile-time const values for array size resolution */
static constValues: Map<string, number> = new Map();
// ===========================================================================
// FUNCTION & CALLBACK TRACKING
// ===========================================================================
/** Track C-Next defined functions */
static knownFunctions: Set<string> = new Set();
/** ADR-013: Track function parameter const-ness for call-site validation */
static functionSignatures: Map<string, IFunctionSignature> = new Map();
/** ADR-029: Callback types registry (function-as-type pattern) */
static callbackTypes: Map<string, ICallbackTypeInfo> = new Map();
/** Callback field types: "Struct.field" -> callbackTypeName */
static callbackFieldTypes: Map<string, string> = new Map();
/**
* Functions that are assigned to C callback typedefs.
* Maps function name -> typedef name (e.g., "my_flush" -> "flush_cb_t")
* Issue #895: We need the typedef name to look up parameter types.
*/
static callbackCompatibleFunctions: Map<string, string> = new Map();
// ===========================================================================
// PASS-BY-VALUE ANALYSIS (Issue #269)
// ===========================================================================
/** Tracks which parameters are modified (directly or transitively) */
static modifiedParameters: Map<string, Set<string>> = new Map();
/** Issue #579: Parameters with subscript access (must become pointers) */
static subscriptAccessedParameters: Map<string, Set<string>> = new Map();
/** Parameters that should pass by value (small, unmodified primitives) */
static passByValueParams: Map<string, Set<string>> = new Map();
/** Function call relationships for transitive modification analysis */
static functionCallGraph: Map<string, ICallGraphEntry[]> = new Map();
/** Function parameter lists for call graph analysis */
static functionParamLists: Map<string, string[]> = new Map();
/** Issue #558: Cross-file modifications to inject */
static pendingCrossFileModifications: ReadonlyMap<
string,
ReadonlySet<string>
> | null = null;
/** Issue #558: Cross-file parameter lists to inject */
static pendingCrossFileParamLists: ReadonlyMap<
string,
readonly string[]
> | null = null;
// ===========================================================================
// OVERFLOW & DIVISION HELPERS (ADR-044, ADR-051)
// ===========================================================================
/** Track which overflow helper types/operations are needed: "add_u8", etc. */
static usedClampOps: Set<string> = new Set();
/** Track which safe division helpers are needed: "div_u32", "mod_i16" */
static usedSafeDivOps: Set<string> = new Set();
// ===========================================================================
// CURRENT CONTEXT (changes during AST traversal)
// ===========================================================================
/** ADR-016: Current scope for name resolution */
static currentScope: string | null = null;
/** Issue #269: Current function for modification tracking */
static currentFunctionName: string | null = null;
/** Issue #477: Current function return type for enum inference */
static currentFunctionReturnType: string | null = null;
/** ADR-006: Current function parameters for pointer semantics */
static currentParameters: Map<string, TParameterInfo> = new Map();
/** ADR-016: Local variables in current function (allowed as bare identifiers) */
static localVariables: Set<string> = new Set();
/** ADR-006: Local array variables (no & needed when passing) */
static localArrays: Set<string> = new Set();
/** Scope member names: scope -> Set of member names */
private static scopeMembers: Map<string, Set<string>> = new Map();
/** Float bit indexing: declared shadow variables */
static floatBitShadows: Set<string> = new Set();
/** Float bit indexing: shadows with current value (skip redundant reads) */
static floatShadowCurrent: Set<string> = new Set();
// ===========================================================================
// GENERATION STATE
// ===========================================================================
/** Current indentation level */
static indentLevel: number = 0;
/** Whether we're inside a function body */
static inFunctionBody: boolean = false;
/** Expected type for struct initializers and enum inference */
static expectedType: string | null = null;
/**
* Suppress bare enum resolution even when expectedType is set.
* Issue #872: MISRA 7.2 requires expectedType for U suffix on function args,
* but bare enum resolution in function args was never allowed and changing
* that would require ADR approval.
*/
static suppressBareEnumResolution: boolean = false;
/** Track args parameter name for main() translation */
static mainArgsName: string | null = null;
/** ADR-044: Current assignment context for overflow behavior */
static assignmentContext: IAssignmentContext = {
targetName: null,
targetType: null,
overflowBehavior: "clamp",
};
/** ADR-035: Element count for array size inference */
static lastArrayInitCount: number = 0;
/** ADR-035: Fill-all value for array initialization */
static lastArrayFillValue: string | undefined = undefined;
/** strlen optimization: variable name -> temp variable name */
static lengthCache: Map<string, string> | null = null;
/** ADR-049: Target platform capabilities */
static targetCapabilities: ITargetCapabilities = DEFAULT_TARGET;
// ===========================================================================
// INCLUDE FLAGS (track required standard library includes)
// ===========================================================================
/** For u8, u16, u32, u64, i8, i16, i32, i64 */
static needsStdint: boolean = false;
/** For bool type */
static needsStdbool: boolean = false;
/** ADR-045: For strlen, strncpy, etc. */
static needsString: boolean = false;
/** For float bit indexing size verification */
static needsFloatStaticAssert: boolean = false;
/** ADR-040: For ISR function pointer type */
static needsISR: boolean = false;
/** ADR-049/050: For atomic intrinsics and critical sections */
static needsCMSIS: boolean = false;
/** Issue #632: For float-to-int clamp casts */
static needsLimits: boolean = false;
/** Issue #473: IRQ wrappers for critical sections */
static needsIrqWrappers: boolean = false;
// ===========================================================================
// OPAQUE TYPE SCOPE VARIABLES (Issue #948)
// ===========================================================================
/**
* Tracks scope variables with opaque (forward-declared) struct types.
* These are generated as pointers with NULL initialization and should
* be passed directly (not with &) since they're already pointers.
* Maps qualified name (e.g., "MyScope_widget") to true.
*/
private static opaqueScopeVariables: Set<string> = new Set();
// ===========================================================================
// C++ MODE STATE (Issue #250)
// ===========================================================================
/** Use temp vars instead of compound literals */
static cppMode: boolean = false;
/** Debug mode generates panic-on-overflow helpers (ADR-044) */
static debugMode: boolean = false;
/** Pending temp variable declarations for C++ mode */
static pendingTempDeclarations: string[] = [];
/** Counter for unique temp variable names */
static tempVarCounter: number = 0;
/** Issue #517: Pending field assignments for C++ class struct init */
static pendingCppClassAssignments: string[] = [];
/** Issue #369: Whether self-include was added */
static selfIncludeAdded: boolean = false;
// ===========================================================================
// SOURCE PATHS (ADR-010, Issue #349)
// ===========================================================================
/** Source file path for validating includes */
static sourcePath: string | null = null;
/** Include directories for resolving angle-bracket .cnx includes */
static includeDirs: string[] = [];
/** Input directories for calculating relative paths */
static inputs: string[] = [];
// ===========================================================================
// LIFECYCLE METHODS
// ===========================================================================
/**
* Reset all state for a fresh generation pass.
* Called at the start of CodeGenerator.generate()
*/
static reset(targetCapabilities?: ITargetCapabilities): void {
// Generator reference
this.generator = null;
// Symbol data
this.symbols = null;
// Note: symbolTable is NOT reset here — it persists across per-file generates.
// It is cleared via symbolTable.clear() at the start of each Transpiler run.
// Type tracking
this.typeRegistry = new Map();
this.constValues = new Map();
// Function & callback tracking
this.knownFunctions = new Set();
this.functionSignatures = new Map();
this.callbackTypes = new Map();
this.callbackFieldTypes = new Map();
// Note: callbackCompatibleFunctions is NOT reset here — it's populated by
// FunctionCallAnalyzer (which runs before CodeGenerator.generate()) and must
// persist into code generation. It is cleared at the start of each Transpiler run.
// Pass-by-value analysis
this.modifiedParameters = new Map();
this.subscriptAccessedParameters = new Map();
this.passByValueParams = new Map();
this.functionCallGraph = new Map();
this.functionParamLists = new Map();
// Note: pendingCrossFileModifications/ParamLists are set externally, not reset
// Overflow & division helpers
this.usedClampOps = new Set();
this.usedSafeDivOps = new Set();
// Current context
this.currentScope = null;
this.currentFunctionName = null;
this.currentFunctionReturnType = null;
this.currentParameters = new Map();
this.localVariables = new Set();
this.localArrays = new Set();
this.scopeMembers = new Map();
this.floatBitShadows = new Set();
this.floatShadowCurrent = new Set();
// Generation state
this.indentLevel = 0;
this.inFunctionBody = false;
this.expectedType = null;
this.suppressBareEnumResolution = false;
this.mainArgsName = null;
this.assignmentContext = {
targetName: null,
targetType: null,
overflowBehavior: "clamp",
};
this.lastArrayInitCount = 0;
this.lastArrayFillValue = undefined;
this.lengthCache = null;
this.targetCapabilities = targetCapabilities ?? DEFAULT_TARGET;
// Include flags
this.needsStdint = false;
this.needsStdbool = false;
this.needsString = false;
this.needsFloatStaticAssert = false;
this.needsISR = false;
this.needsCMSIS = false;
this.needsLimits = false;
this.needsIrqWrappers = false;
// C++ mode state
this.cppMode = false;
this.debugMode = false;
this.pendingTempDeclarations = [];
this.tempVarCounter = 0;
this.pendingCppClassAssignments = [];
this.selfIncludeAdded = false;
// Issue #948: Opaque scope variables (reset per-file)
this.opaqueScopeVariables = new Set();
// Source paths
this.sourcePath = null;
this.includeDirs = [];
this.inputs = [];
}
/**
* Enter a function body context.
* Clears local tracking and sets inFunctionBody flag.
*/
static enterFunctionBody(): void {
this.inFunctionBody = true;
this.localVariables.clear();
this.localArrays.clear();
this.floatBitShadows.clear();
this.floatShadowCurrent.clear();
}
/**
* Exit a function body context.
* Clears local tracking and sets inFunctionBody to false.
*/
static exitFunctionBody(): void {
this.inFunctionBody = false;
this.localVariables.clear();
this.localArrays.clear();
this.floatBitShadows.clear();
this.floatShadowCurrent.clear();
}
/**
* Execute a function with a temporary expectedType, restoring on completion.
* Issue #872: Extracted to eliminate duplicate save/restore pattern and add exception safety.
*
* @param type - The expected type to set (if falsy, no change is made)
* @param fn - The function to execute
* @param suppressEnumResolution - If true, suppress bare enum resolution (for MISRA-only contexts)
* @returns The result of the function
*/
static withExpectedType<T>(
type: string | undefined | null,
fn: () => T,
suppressEnumResolution: boolean = false,
): T {
if (!type) {
return fn();
}
const savedType = this.expectedType;
const savedSuppress = this.suppressBareEnumResolution;
this.expectedType = type;
if (suppressEnumResolution) {
this.suppressBareEnumResolution = true;
}
try {
return fn();
} finally {
this.expectedType = savedType;
this.suppressBareEnumResolution = savedSuppress;
}
}
// ===========================================================================
// CONVENIENCE LOOKUP METHODS
// ===========================================================================
/**
* Check if a type name is a known struct.
* Also includes bitmaps since they're struct-like (Issue #551).
*/
static isKnownStruct(name: string): boolean {
if (this.symbols?.knownStructs.has(name)) return true;
if (this.symbols?.knownBitmaps.has(name)) return true;
Iif (this.symbolTable.getStructFields(name)) return true;
return false;
}
/**
* Check if a type name is a known scope.
*/
static isKnownScope(name: string): boolean {
return this.symbols?.knownScopes.has(name) ?? false;
}
/**
* Check if a type name is a known enum.
*/
static isKnownEnum(name: string): boolean {
return this.symbols?.knownEnums.has(name) ?? false;
}
/**
* Check if a type name is a known bitmap.
*/
static isKnownBitmap(name: string): boolean {
return this.symbols?.knownBitmaps.has(name) ?? false;
}
/**
* Check if a type name is a known register.
*/
static isKnownRegister(name: string): boolean {
return this.symbols?.knownRegisters.has(name) ?? false;
}
/**
* Issue #948: Check if a type name is an opaque (forward-declared) struct type.
* Opaque types are incomplete types that can only be used as pointers.
* Example: `typedef struct _widget_t widget_t;` without a body makes `widget_t` opaque.
*/
static isOpaqueType(typeName: string): boolean {
return this.symbols?.opaqueTypes.has(typeName) ?? false;
}
/**
* Issue #958: Check if a type name is an external typedef struct type.
* External typedef struct types should use pointer semantics for scope variables.
* Unlike isOpaqueType, this returns true for both forward-declared and complete structs.
*/
static isTypedefStructType(typeName: string): boolean {
return this.symbolTable?.isTypedefStructType(typeName) ?? false;
}
/**
* Get type info for a variable.
* Checks local typeRegistry first, then falls back to SymbolTable
* for cross-file variables from included .cnx files.
*
* Issue #786: This unified lookup ensures cross-file variables
* (defined in included files) are found even before code generation
* registers them locally.
*/
static getVariableTypeInfo(name: string): TTypeInfo | undefined {
// First check the local type registry (current file's variables)
const localInfo = this.typeRegistry.get(name);
if (localInfo) {
return localInfo;
}
// ADR-055 Phase 7: Fall back to SymbolTable for cross-file C-Next variables only.
const symbol = this.symbolTable.getTSymbol(name);
if (symbol?.kind === "variable" && symbol.type) {
return this.convertTSymbolToTypeInfo(symbol);
}
// Issue #978: Fall back to C symbols for external struct globals from .h headers.
// Only return type info for struct-typed variables — returning info for all
// C types would cause regressions (e.g., array indexing misread as bit extraction).
const cSymbol = this.symbolTable.getCSymbol(name);
if (cSymbol?.kind === "variable" && cSymbol.type) {
const baseType = CodeGenState.stripTrailingPointers(cSymbol.type);
if (
this.symbolTable.isTypedefStructType(baseType) ||
this.symbolTable.getStructFields(baseType)
) {
return {
baseType,
bitWidth: 0,
isArray: cSymbol.isArray || false,
isConst: cSymbol.isConst || false,
isPointer: cSymbol.type.endsWith("*"),
};
}
}
return undefined;
}
/**
* Legacy alias for getVariableTypeInfo.
* @deprecated Use getVariableTypeInfo() instead
*/
static getTypeInfo(name: string): TTypeInfo | undefined {
return this.getVariableTypeInfo(name);
}
/**
* Check if a variable type is registered (locally or in SymbolTable).
* ADR-055 Phase 7: Uses getTSymbol for typed symbol lookup.
*/
static hasVariableTypeInfo(name: string): boolean {
if (this.typeRegistry.has(name)) {
return true;
}
const symbol = this.symbolTable.getTSymbol(name);
if (symbol?.kind === "variable" && symbol.type !== undefined) {
return true;
}
// Issue #978: Check C symbols for external struct globals only
const cSymbol = this.symbolTable.getCSymbol(name);
if (cSymbol?.kind === "variable" && cSymbol.type) {
const baseType = CodeGenState.stripTrailingPointers(cSymbol.type);
return (
this.symbolTable.isTypedefStructType(baseType) ||
!!this.symbolTable.getStructFields(baseType)
);
}
return false;
}
/**
* Set variable type info in the local registry.
*/
static setVariableTypeInfo(name: string, info: TTypeInfo): void {
this.typeRegistry.set(name, info);
}
/**
* Delete variable type info from the local registry.
*/
static deleteVariableTypeInfo(name: string): void {
this.typeRegistry.delete(name);
}
/**
* Get a read-only view of the local type registry.
* Used for passing to helper functions that need to iterate over types.
* Note: This only returns locally registered types, not cross-file symbols.
*/
static getTypeRegistryView(): ReadonlyMap<string, TTypeInfo> {
return this.typeRegistry;
}
/**
* Convert a TSymbol IVariableSymbol to TTypeInfo for unified type lookups.
* ADR-055 Phase 7: Works with typed TSymbol instead of ISymbol.
*/
/**
* Strip trailing pointer stars from a C type string (e.g., "font_t*" → "font_t").
* Uses string operations instead of regex to avoid SonarCloud ReDoS flag (S5852).
*/
private static stripTrailingPointers(type: string): string {
let end = type.length;
while (end > 0 && type[end - 1] === "*") {
end--;
}
return type.slice(0, end).trim();
}
private static convertTSymbolToTypeInfo(
symbol: import("../types/symbols/IVariableSymbol").default,
): TTypeInfo {
const typeName = TypeResolver.getTypeName(symbol.type);
// Parse string capacity using regex
const stringPattern = /^string<(\d+)>$/;
const stringMatch = stringPattern.exec(typeName);
const isString = stringMatch !== null;
const stringCapacity = stringMatch
? Number.parseInt(stringMatch[1], 10)
: undefined;
// Use char for string types to match local convention
const baseType = isString ? "char" : typeName;
const isEnum = this.isKnownEnum(baseType);
return {
baseType,
bitWidth: isString ? 8 : TYPE_WIDTH[baseType] || 0,
isArray: symbol.isArray || false,
arrayDimensions: symbol.arrayDimensions
?.map((d) => (typeof d === "number" ? d : Number.parseInt(d, 10)))
.filter((n) => !Number.isNaN(n)),
isConst: symbol.isConst || false,
isAtomic: symbol.isAtomic || false,
isEnum,
enumTypeName: isEnum ? baseType : undefined,
isString,
stringCapacity,
};
}
/**
* Check if a parameter in a function is modified.
*/
static isParameterModified(funcName: string, paramName: string): boolean {
return this.modifiedParameters.get(funcName)?.has(paramName) ?? false;
}
/**
* Compute unmodified parameters for all functions on-demand.
* Returns a map of function name -> Set of parameter names NOT modified.
* Computed from functionSignatures and modifiedParameters (no cached state).
*/
static getUnmodifiedParameters(): Map<string, Set<string>> {
const result = new Map<string, Set<string>>();
for (const [funcName, signature] of this.functionSignatures) {
const modifiedSet = this.modifiedParameters.get(funcName);
const unmodified = new Set<string>();
for (const param of signature.parameters) {
if (!modifiedSet?.has(param.name)) {
unmodified.add(param.name);
}
}
result.set(funcName, unmodified);
}
return result;
}
/**
* Check if a parameter should pass by value.
*/
static isPassByValue(funcName: string, paramName: string): boolean {
return this.passByValueParams.get(funcName)?.has(paramName) ?? false;
}
/**
* Check if a parameter has subscript access.
*/
static hasSubscriptAccess(funcName: string, paramName: string): boolean {
return (
this.subscriptAccessedParameters.get(funcName)?.has(paramName) ?? false
);
}
/**
* Get the function signature for a function.
*/
static getFunctionSignature(name: string): IFunctionSignature | undefined {
return this.functionSignatures.get(name);
}
/**
* Get callback type info for a function name.
*/
static getCallbackType(name: string): ICallbackTypeInfo | undefined {
return this.callbackTypes.get(name);
}
/**
* Issue #895: Get the typedef type string for a C typedef by name.
* Used to look up function pointer typedef signatures for callback-compatible functions.
*
* @param typedefName - Name of the typedef (e.g., "flush_cb_t")
* @returns The type string (e.g., "void (*)(widget_t *, const rect_t *, uint8_t *)") or undefined
*/
static getTypedefType(typedefName: string): string | undefined {
const symbol = this.symbolTable.getCSymbol(typedefName);
Iif (symbol?.kind === "type") {
return symbol.type;
}
return undefined;
}
/**
* Check if a type name is a known C-Next function.
*/
static isCNextFunction(name: string): boolean {
return this.knownFunctions.has(name);
}
/**
* Check if a name is a compile-time const value.
*/
static isConstValue(name: string): boolean {
return this.constValues.has(name);
}
/**
* Get the compile-time value of a const.
*/
static getConstValue(name: string): number | undefined {
return this.constValues.get(name);
}
/**
* Get parameter info from current function context.
*/
static getParameterInfo(name: string): TParameterInfo | undefined {
return this.currentParameters.get(name);
}
/**
* Check if a name is a local variable.
*/
static isLocalVariable(name: string): boolean {
return this.localVariables.has(name);
}
/**
* Check if a name is a local array.
*/
static isLocalArray(name: string): boolean {
return this.localArrays.has(name);
}
/**
* Get members of a scope.
*/
static getScopeMembers(scopeName: string): Set<string> | undefined {
return this.scopeMembers.get(scopeName);
}
/**
* Set members of a scope.
*/
static setScopeMembers(scopeName: string, members: Set<string>): void {
this.scopeMembers.set(scopeName, members);
}
/**
* Get all scope members (for IGeneratorState).
*/
static getAllScopeMembers(): ReadonlyMap<string, ReadonlySet<string>> {
return this.scopeMembers;
}
/**
* Check if an identifier is a member of the current scope.
*/
static isCurrentScopeMember(identifier: string): boolean {
if (!this.currentScope) return false;
return this.scopeMembers.get(this.currentScope)?.has(identifier) ?? false;
}
/**
* Resolve an identifier to its fully-scoped name.
* Inside a scope, checks if the identifier is a scope member first.
*/
static resolveIdentifier(identifier: string): string {
if (this.currentScope) {
const members = this.scopeMembers.get(this.currentScope);
if (members?.has(identifier)) {
return `${this.currentScope}_${identifier}`;
}
}
return identifier;
}
/**
* Get struct field type (simple lookup).
*/
static getStructFieldType(
structName: string,
fieldName: string,
): string | undefined {
return this.symbols?.structFields.get(structName)?.get(fieldName);
}
/**
* Get struct field info including dimensions (checks SymbolTable then local symbols).
*/
static getStructFieldInfo(
structType: string,
fieldName: string,
): { type: string; dimensions?: (number | string)[] } | null {
// First check SymbolTable (C header structs)
const fieldInfo = this.symbolTable.getStructFieldInfo(
structType,
fieldName,
);
if (fieldInfo) {
return {
type: fieldInfo.type,
dimensions: fieldInfo.arrayDimensions,
};
}
// Fall back to local C-Next struct fields
const localFields = this.symbols?.structFields.get(structType);
if (localFields) {
const fieldType = localFields.get(fieldName);
Eif (fieldType) {
const fieldDimensions =
this.symbols?.structFieldDimensions.get(structType);
const dimensions = fieldDimensions?.get(fieldName);
return {
type: fieldType,
dimensions: dimensions ? [...dimensions] : undefined,
};
}
}
return null;
}
/**
* Get member type info for a struct field.
* Returns full TTypeInfo for the field, or null if not found.
*/
static getMemberTypeInfo(
structType: string,
memberName: string,
): TTypeInfo | null {
const fieldInfo = this.getStructFieldInfo(structType, memberName);
Iif (!fieldInfo) return null;
const isArray =
(fieldInfo.dimensions !== undefined && fieldInfo.dimensions.length > 0) ||
(this.symbols?.structFieldArrays.get(structType)?.has(memberName) ??
false);
const dims = fieldInfo.dimensions?.filter(
(d): d is number => typeof d === "number",
);
return {
baseType: fieldInfo.type,
bitWidth: TYPE_WIDTH[fieldInfo.type] ?? 32,
isConst: false,
isArray,
arrayDimensions: dims && dims.length > 0 ? dims : undefined,
};
}
/**
* Check if a struct field is an array.
*/
static isStructFieldArray(structName: string, fieldName: string): boolean {
return (
this.symbols?.structFieldArrays.get(structName)?.has(fieldName) ?? false
);
}
/**
* Get enum members for an enum.
*/
static getEnumMembers(
enumName: string,
): ReadonlyMap<string, number> | undefined {
return this.symbols?.enumMembers.get(enumName);
}
/**
* Build external struct fields from the symbol table.
* Called once per run after all headers are processed.
* Issue #355: Excludes array fields from init checking.
*/
static buildExternalStructFields(): void {
this.externalStructFields.clear();
const allStructFields = this.symbolTable.getAllStructFields();
for (const [structName, fieldMap] of allStructFields) {
const nonArrayFields = new Set<string>();
for (const [fieldName, fieldInfo] of fieldMap) {
// Only include non-array fields in init checking
if (
!fieldInfo.arrayDimensions ||
fieldInfo.arrayDimensions.length === 0
) {
nonArrayFields.add(fieldName);
}
}
if (nonArrayFields.size > 0) {
this.externalStructFields.set(structName, nonArrayFields);
}
}
}
/**
* Get external struct fields for initialization analysis.
*/
static getExternalStructFields(): Map<string, Set<string>> {
return this.externalStructFields;
}
/**
* Get function return type.
*/
static getFunctionReturnType(funcName: string): string | undefined {
return this.symbols?.functionReturnTypes.get(funcName);
}
// ===========================================================================
// INCLUDE FLAG HELPERS
// ===========================================================================
/**
* Mark that stdint.h is needed.
*/
static requireStdint(): void {
this.needsStdint = true;
}
/**
* Mark that stdbool.h is needed.
*/
static requireStdbool(): void {
this.needsStdbool = true;
}
/**
* Mark that string.h is needed.
*/
static requireString(): void {
this.needsString = true;
}
/**
* Mark that CMSIS headers are needed.
*/
static requireCMSIS(): void {
this.needsCMSIS = true;
}
/**
* Mark that limits.h is needed.
*/
static requireLimits(): void {
this.needsLimits = true;
}
/**
* Mark that ISR type is needed.
*/
static requireISR(): void {
this.needsISR = true;
}
// ===========================================================================
// TYPE REGISTRATION HELPERS
// ===========================================================================
/**
* Register a variable type.
*/
static registerType(name: string, info: TTypeInfo): void {
this.setVariableTypeInfo(name, info);
}
/**
* Register a const value.
*/
static registerConstValue(name: string, value: number): void {
this.constValues.set(name, value);
}
/**
* Register a local variable.
*/
static registerLocalVariable(name: string, isArray: boolean = false): void {
this.localVariables.add(name);
if (isArray) {
this.localArrays.add(name);
}
}
/**
* Register a function signature.
*/
static registerFunctionSignature(
name: string,
sig: IFunctionSignature,
): void {
this.functionSignatures.set(name, sig);
this.knownFunctions.add(name);
}
/**
* Register a callback type.
*/
static registerCallbackType(name: string, info: ICallbackTypeInfo): void {
this.callbackTypes.set(name, info);
}
/**
* Register a callback field type.
*/
static registerCallbackFieldType(key: string, typeName: string): void {
this.callbackFieldTypes.set(key, typeName);
}
/**
* Mark a clamp operation as used.
*/
static markClampOpUsed(operation: string, cnxType: string): void {
this.usedClampOps.add(`${operation}_${cnxType}`);
}
/**
* Mark a safe div operation as used.
*/
static markSafeDivOpUsed(operation: string, cnxType: string): void {
this.usedSafeDivOps.add(`${operation}_${cnxType}`);
}
// ===========================================================================
// FLOAT BIT SHADOW HELPERS
// ===========================================================================
/**
* Register a float bit shadow variable.
*/
static registerFloatBitShadow(name: string): void {
this.floatBitShadows.add(name);
}
/**
* Check if a float bit shadow exists.
*/
static hasFloatBitShadow(name: string): boolean {
return this.floatBitShadows.has(name);
}
/**
* Mark a float shadow as having current value.
*/
static markFloatShadowCurrent(name: string): void {
this.floatShadowCurrent.add(name);
}
/**
* Check if a float shadow has current value.
*/
static isFloatShadowCurrent(name: string): boolean {
return this.floatShadowCurrent.has(name);
}
// ===========================================================================
// OPAQUE SCOPE VARIABLE HELPERS (Issue #948)
// ===========================================================================
/**
* Mark a scope variable as having an opaque (forward-declared) struct type.
* These are generated as pointers with NULL initialization.
*
* @param qualifiedName - The fully qualified variable name (e.g., "MyScope_widget")
*/
static markOpaqueScopeVariable(qualifiedName: string): void {
this.opaqueScopeVariables.add(qualifiedName);
}
/**
* Check if a scope variable has an opaque type (and is thus a pointer).
* Used during access generation to determine if & prefix is needed.
*
* @param qualifiedName - The fully qualified variable name (e.g., "MyScope_widget")
* @returns true if this is an opaque scope variable (already a pointer)
*/
static isOpaqueScopeVariable(qualifiedName: string): boolean {
return this.opaqueScopeVariables.has(qualifiedName);
}
// ===========================================================================
// C++ MODE HELPERS
// ===========================================================================
/**
* Add a pending temp declaration for C++ mode.
*/
static addPendingTempDeclaration(decl: string): void {
this.pendingTempDeclarations.push(decl);
}
/**
* Flush and return pending temp declarations.
*/
static flushPendingTempDeclarations(): string[] {
const decls = this.pendingTempDeclarations;
this.pendingTempDeclarations = [];
return decls;
}
/**
* Get a unique temp variable name.
*/
static getNextTempVarName(): string {
return `_tmp${this.tempVarCounter++}`;
}
}
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