From 344206d57e834b2394cbe2ec0df50b04a8b3c171 Mon Sep 17 00:00:00 2001 From: _ov4 Date: Sun, 26 Jul 2026 15:45:40 +0000 Subject: feat: implement CIE 9.1 text file handling (OPENFILE/READFILE/WRITEFILE/CLOSEFILE/EOF) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Front end: OPENFILE/READFILE/WRITEFILE/CLOSEFILE plus reserved mode keywords READ/WRITE/APPEND (RANDOM reserved with a dedicated not-implemented error); statement nodes in new FileAST.h, parsing in new ParserFile.cc; EOF joins the Builtins table as the 12th builtin and CallExprAST now carries a line number for its runtime diagnostics. Runtime: new FileHandler (StringHandler-shaped leaf) lazily synthesizes internal __cps_file_* helper functions and a 16-slot open-file table keyed by filename content (strcmp — STRING '=' is pointer identity). EOF is an fgetc/ungetc peek; READFILE grows a malloc/realloc line buffer and strips a trailing CR; fopen uses text modes so mingw-w64 line translation works. File-free programs get byte-identical IR. All misuse (not open, wrong mode, reopen, fopen failure, read past EOF, table full) dies with the existing "[Fatal] line N:" pattern via a new RuntimeCheck::emitErrorAndExit overload taking runtime printf args. Also fixes a pre-existing ArithmeticHandler hole surfaced by adversarial review: mixed-width integer operands (i1 BOOLEAN / i8 CHAR vs i64) now widen via ZExt instead of emitting invalid IR, and remaining type mismatches get a clean diagnostic; -EOF(f) and -IS_NUM(x) compile. Co-Authored-By: Claude Fable 5 --- include/cps/FileHandler.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 include/cps/FileHandler.h (limited to 'include/cps/FileHandler.h') diff --git a/include/cps/FileHandler.h b/include/cps/FileHandler.h new file mode 100644 index 0000000..aaad6a0 --- /dev/null +++ b/include/cps/FileHandler.h @@ -0,0 +1,75 @@ +#pragma once +#include "cps/FileMode.h" +#include "llvm/IR/IRBuilder.h" +#include "llvm/IR/LLVMContext.h" +#include "llvm/IR/Module.h" + +namespace cps { + +class RuntimeCheck; + +// Emits the text-file runtime: a fixed-size open-file table plus internal +// __cps_file_* helper functions, synthesized once on first use so programs +// without file statements keep their IR unchanged. The table is keyed by +// filename *content* (strcmp) — pseudocode STRING equality is pointer +// identity, so the same file may be named by many different buffers. +// Leaf module: methods only take and return llvm::Value*s; expression +// evaluation, type coercion and the symbol table stay in CodeGen. +class FileHandler { + llvm::LLVMContext &Context; + llvm::IRBuilder<> &Builder; + llvm::Module &Module; + RuntimeCheck &Checker; + + static constexpr uint64_t TableSize = 16; + bool RuntimeEmitted = false; + + // libc — declared lazily on first file use + llvm::FunctionCallee FopenFunc, FcloseFunc, FgetcFunc, UngetcFunc, + FputsFunc, FputcFunc, MallocFunc, ReallocFunc, + StrcmpFunc; + + // open-file table + llvm::GlobalVariable *FileNames = nullptr; // [TableSize x ptr] STRING passed to OPENFILE + llvm::GlobalVariable *FileHandles = nullptr; // [TableSize x ptr] FILE* + llvm::GlobalVariable *FileModes = nullptr; // [TableSize x i8] 0 = free slot, else FileMode + + llvm::Value *ModeReadStr = nullptr, *ModeWriteStr = nullptr, *ModeAppendStr = nullptr; + llvm::Value *ErrOpenFail = nullptr, *ErrAlreadyOpen = nullptr, *ErrTableFull = nullptr, + *ErrNotOpen = nullptr, *ErrNotRead = nullptr, *ErrNotWrite = nullptr, + *ErrPastEof = nullptr; + + // synthesized helpers (internal linkage; pseudocode identifiers cannot + // start with '_', so these names are un-collidable) + llvm::Function *FindFn = nullptr, *OpenFn = nullptr, *ReadFn = nullptr, + *WriteFn = nullptr, *CloseFn = nullptr, *EofFn = nullptr; + + void setupExternalFunctions(); + void setupGlobals(); + void ensureRuntime(); + + llvm::Function *createHelper(const char *Name, llvm::FunctionType *FT); + llvm::Value *emitSlotGEP(llvm::GlobalVariable *Table, llvm::Type *ElemTy, llvm::Value *Idx); + llvm::Value *emitLookupOrFail(llvm::Value *Name, llvm::Value *Line); + void buildFindFn(); + void buildOpenFn(); + void buildReadFn(); + void buildWriteFn(); + void buildCloseFn(); + void buildEofFn(); + +public: + FileHandler(llvm::LLVMContext &Ctx, llvm::IRBuilder<> &B, llvm::Module &M, + RuntimeCheck &RC); + + // NameStr/DataStr are already-coerced STRING ptrs; Line is the statement's + // source line for runtime diagnostics. All methods null-check and bail; + // the caller (CodeGen) does the diagnostics. + void emitOpen(llvm::Value *NameStr, FileMode Mode, int Line); + llvm::Value *emitRead(llvm::Value *NameStr, int Line); // returns STRING ptr + void emitWrite(llvm::Value *NameStr, llvm::Value *DataStr, int Line); + void emitClose(llvm::Value *NameStr, int Line); + llvm::Value *emitEof(llvm::Value *NameStr, int Line); // returns i1 +}; + +} // namespace cps -- cgit v1.3.1-4-g156e