add file support

compiler/arch.ts

@@ -52,6 +52,12 @@ export const Builtins = {
     ArrayLength: 0x24,
     StructSet: 0x30,
     Print: 0x40,
+    FileOpen: 0x41,
+    FileClose: 0x42,
+    FileWriteString: 0x43,
+    FileReadToString: 0x44,
+    FileFlush: 0x45,
+    FileEof: 0x46,
 } as const;
 
 export function opToString(op: number): string {

editors/vim/syntax/slige.vim

@@ -9,7 +9,7 @@ endif
 
 syn keyword Keyword break return let fn loop if else struct import or and not
 syn keyword Special null
-syn keyword Type int string
+syn keyword Type int string bool
 syn keyword Boolean true false
 
 syn match Operator '+'

examples/file.slg

@@ -0,0 +1,29 @@
+
+
+// let stdin = 0;
+// let stdout = 1;
+// let stderr = 2;
+
+fn print(msg: string) #[builtin(Print)] {}
+fn println(msg: string) { print(msg + "\n") }
+
+fn file_open(filename: string, mode: string) -> int #[builtin(FileOpen)] {}
+fn file_close(file: int) #[builtin(FileClose)] {}
+fn file_write_string(file: int, content: string) -> int #[builtin(FileWriteString)] {}
+fn file_read_to_string(file: int) -> string #[builtin(FileReadToString)] {}
+fn file_flush(file: int) #[builtin(FileFlush)] {}
+fn file_eof(file: int) -> bool #[builtin(FileEof)] {}
+
+fn main() {
+    let file = file_open("test.txt", "w");
+    file_write_string(file, "hello world");
+    file_close(file);
+
+    file = file_open("test.txt", "r");
+    let content = file_read_to_string(file);
+    file_close(file);
+
+    file_write_string(1, content + "\n");
+    file_flush(1);
+}
+

examples/std.slg

@@ -12,6 +12,13 @@ fn array_push_string(array: [string], value: string) #[builtin(ArrayPush)] {}
 fn array_length_string(array: [string]) -> int #[builtin(ArrayLength)] {}
 fn array_at_string(array: [string], index: int) -> string #[builtin(ArrayAt)] {}
 
+fn file_open(filename: string, mode: string) -> int #[builtin(FileOpen)] {}
+fn file_close(file: int) #[builtin(FileClose)] {}
+fn file_write_string(file: int, content: string) -> int #[builtin(FileWriteString)] {}
+fn file_read_to_string(file: int) -> string #[builtin(FileReadToString)] {}
+fn file_flush(file: int) #[builtin(FileFlush)] {}
+fn file_eof(file: int) -> bool #[builtin(FileEof)] {}
+
 fn char(ch: string) -> int {
     string_char_at(ch, 0)
 }

runtime/Makefile

@@ -1,19 +1,30 @@
 
-# CXX_FLAGS = \
-# 	-std=c++23 \
-# 	-Og \
-# 	-fsanitize=address,undefined \
-# 	-pedantic -pedantic-errors \
-# 	-Wall -Wextra -Wpedantic -Wconversion -Werror \
 
 
+MAKEFLAGS := --jobs=$(shell nproc)
+
+RELEASE=0
+
+ifeq ($(RELEASE),1)
+
+CXX_FLAGS = \
+	-std=c++23 \
+	-O2 \
+	-pedantic -pedantic-errors \
+	-Wall -Wextra -Wpedantic -Wconversion -Werror\
+
+else
+
 CXX_FLAGS = \
 	-std=c++23 \
 	-fsanitize=address,undefined \
 	-Og \
 	-pedantic -pedantic-errors \
-	-Wall -Wextra -Wpedantic -Wconversion -Werror \
+	-Wall -Wextra -Wpedantic -Wconversion -Werror\
 
+endif
+
+CXX = g++
 
 OUT=build/sliger
 
@@ -23,8 +34,6 @@ CXX_SOURCES = $(shell find . -name "*.cpp" -type f -printf '%P\n')
 
 CXX_OBJECTS = $(patsubst %.cpp,build/%.o,$(CXX_SOURCES))
 
-CXX = g++
-
 all: build_dir $(OUT)
 
 $(OUT): $(CXX_OBJECTS)

runtime/arch.hpp

@@ -53,6 +53,12 @@ enum class Builtin : uint32_t {
     ArrayLength = 0x24,
     StructSet = 0x30,
     Print = 0x40,
+    FileOpen = 0x41,
+    FileClose = 0x42,
+    FileWriteString = 0x43,
+    FileReadToString = 0x44,
+    FileFlush = 0x45,
+    FileEof = 0x46,
 };
 
 }

runtime/to_string.cpp

@@ -1,5 +1,6 @@
-#include "vm.hpp"
 #include "json.hpp"
+#include "vm.hpp"
+#include <string>
 
 using namespace sliger;
 
@@ -42,35 +43,55 @@ auto sliger::maybe_op_to_string(uint32_t value) -> std::string
     }
 }
 
+auto sliger::maybe_builtin_to_string(uint32_t value) -> std::string
+{
+    switch (static_cast<Builtin>(value)) {
+            /* clang-format off */
+        case Builtin::IntToString: return "IntToString";
+        case Builtin::StringConcat: return "StringConcat";
+        case Builtin::StringEqual: return "StringEqual";
+        case Builtin::StringCharAt: return "StringCharAt";
+        case Builtin::StringLength: return "StringLength";
+        case Builtin::StringPushChar: return "StringPushChar";
+        case Builtin::StringToInt: return "StringToInt";
+        case Builtin::ArrayNew: return "ArrayNew";
+        case Builtin::ArraySet: return "ArraySet";
+        case Builtin::ArrayPush: return "ArrayPush";
+        case Builtin::ArrayAt: return "ArrayAt";
+        case Builtin::ArrayLength: return "ArrayLength";
+        case Builtin::StructSet: return "StructSet";
+        case Builtin::Print: return "Print";
+        case Builtin::FileOpen: return "FileOpen";
+        case Builtin::FileClose: return "FileClose";
+        case Builtin::FileWriteString: return "FileWrite";
+        case Builtin::FileReadToString: return "FileReadToString";
+        case Builtin::FileFlush: return "FileFlush";
+        case Builtin::FileEof: return "FileEof";
+        /* clang-format on */
+        default:
+            return std::to_string(value);
+    }
+}
+
 auto json::tok_typ_to_string(json::TokTyp typ) -> std::string
 {
     using namespace json;
 
     switch (typ) {
-        case TokTyp::Eof:
+            /* clang-format off */
-            return "Eof";
+        case TokTyp::Eof: return "Eof";
-        case TokTyp::String:
+        case TokTyp::String: return "String";
-            return "String";
+        case TokTyp::Float: return "Float";
-        case TokTyp::Float:
+        case TokTyp::False: return "False";
-            return "Float";
+        case TokTyp::True: return "True";
-        case TokTyp::False:
+        case TokTyp::Null: return "Null";
-            return "False";
+        case TokTyp::LBrace: return "LBrace";
-        case TokTyp::True:
+        case TokTyp::RBrace: return "RBrace";
-            return "True";
+        case TokTyp::LBracket: return "LBracket";
-        case TokTyp::Null:
+        case TokTyp::RBracket: return "RBracket";
-            return "Null";
+        case TokTyp::Comma: return "Comma";
-        case TokTyp::LBrace:
+        case TokTyp::Colon: return "Colon";
-            return "LBrace";
+            /* clang-format on */
-        case TokTyp::RBrace:
-            return "RBrace";
-        case TokTyp::LBracket:
-            return "LBracket";
-        case TokTyp::RBracket:
-            return "RBracket";
-        case TokTyp::Comma:
-            return "Comma";
-        case TokTyp::Colon:
-            return "Colon";
     }
     std::unreachable();
 }

runtime/vm.cpp

@@ -1,6 +1,7 @@
 #include "vm.hpp"
 #include "arch.hpp"
 #include <cstdint>
+#include <cstdio>
 #include <cstdlib>
 #include <format>
 #include <iostream>
@@ -281,8 +282,8 @@ void VM::run_instruction()
 void VM::run_builtin(Builtin builtin_id)
 {
     if (this->opts.print_stack_debug) {
-        std::cout << std::format(
+        std::cout << std::format("Running builtin {}\n",
-            "Running builtin {}\n", static_cast<uint32_t>(builtin_id));
+            maybe_builtin_to_string(static_cast<uint32_t>(builtin_id)));
     }
     switch (builtin_id) {
         case Builtin::IntToString: {
@@ -293,6 +294,45 @@ void VM::run_builtin(Builtin builtin_id)
             break;
         }
 
+        case Builtin::StringConcat:
+        case Builtin::StringEqual:
+        case Builtin::StringCharAt:
+        case Builtin::StringLength:
+        case Builtin::StringPushChar:
+        case Builtin::StringToInt:
+            run_string_builtin(builtin_id);
+            break;
+
+        case Builtin::ArrayNew:
+        case Builtin::ArraySet:
+        case Builtin::ArrayPush:
+        case Builtin::ArrayAt:
+        case Builtin::ArrayLength:
+            run_array_builtin(builtin_id);
+            break;
+
+        case Builtin::StructSet: {
+            assert_stack_has(2);
+            std::cerr << std::format("not implemented\n");
+            std::exit(1);
+            break;
+        }
+
+        case Builtin::Print:
+        case Builtin::FileOpen:
+        case Builtin::FileClose:
+        case Builtin::FileWriteString:
+        case Builtin::FileReadToString:
+        case Builtin::FileFlush:
+        case Builtin::FileEof:
+            run_file_builtin(builtin_id);
+            break;
+    }
+}
+
+void VM::run_string_builtin(Builtin builtin_id)
+{
+    switch (builtin_id) {
         case Builtin::StringConcat: {
             assert_stack_has(2);
             auto right = stack_pop();
@@ -342,7 +382,13 @@ void VM::run_builtin(Builtin builtin_id)
             stack_push(Int(number));
             break;
         }
-
+        default:
+            break;
+    }
+}
+void VM::run_array_builtin(Builtin builtin_id)
+{
+    switch (builtin_id) {
         case Builtin::ArrayNew: {
             auto alloc_res = this->heap.alloc<heap::AllocType::Array>();
             stack_push(Ptr(alloc_res.val()));
@@ -384,12 +430,14 @@ void VM::run_builtin(Builtin builtin_id)
             stack_push(Int(static_cast<int32_t>(array.values.size())));
             break;
         }
-        case Builtin::StructSet: {
+        default:
-            assert_stack_has(2);
-            std::cerr << std::format("not implemented\n");
-            std::exit(1);
             break;
     }
+}
+
+void VM::run_file_builtin(Builtin builtin_id)
+{
+    switch (builtin_id) {
         case Builtin::Print: {
             assert_stack_has(1);
             auto message = stack_pop().as_string().value;
@@ -397,8 +445,98 @@ void VM::run_builtin(Builtin builtin_id)
             stack_push(Null());
             break;
         }
+        case Builtin::FileOpen: {
+            assert_stack_has(2);
+            auto mode = stack_pop().as_string().value;
+            auto filename = stack_pop().as_string().value;
+            FILE* fp = std::fopen(filename.c_str(), mode.c_str());
+            if (fp == nullptr) {
+                stack_push(Int(0));
+                break;
+            }
+            auto file_id = this->file_id_counter;
+            this->file_id_counter += 1;
+            this->open_files.insert_or_assign(file_id, fp);
+            stack_push(Int(file_id));
+            break;
+        }
+        case Builtin::FileClose: {
+            assert_stack_has(2);
+            auto file_id = stack_pop().as_int().value;
+            auto fp = this->open_files.find(file_id);
+            if (fp != this->open_files.end()) {
+                std::fclose(fp->second);
+                this->open_files.erase(file_id);
+            }
+            stack_push(Null());
+            break;
+        }
+        case Builtin::FileWriteString: {
+            assert_stack_has(2);
+            auto content = stack_pop().as_string().value;
+            auto file_id = stack_pop().as_int().value;
+            auto fp = this->open_files.find(file_id);
+            if (fp == this->open_files.end()) {
+                std::cerr << std::format("error: no open file {}\n", file_id);
+                std::exit(1);
+            }
+            auto res = std::fputs(content.c_str(), fp->second);
+            if (res <= 0) {
+                stack_push(Int(-1));
+                break;
+            }
+            stack_push(Int(0));
+            break;
+        }
+        case Builtin::FileReadToString: {
+            assert_stack_has(1);
+            auto file_id = stack_pop().as_int().value;
+            auto fp = this->open_files.find(file_id);
+            if (fp == this->open_files.end()) {
+                std::cerr << std::format("error: no open file {}\n", file_id);
+                std::exit(1);
+            }
+            auto content = std::string();
+            while (true) {
+                constexpr size_t buf_size = 128;
+                char buf[buf_size] = "";
+                auto res = std::fread(buf, 1, buf_size, fp->second);
+                if (res == 0) {
+                    break;
+                }
+                content.append(std::string(buf));
+            }
+            stack_push(String(std::move(content)));
+            break;
+        }
+        case Builtin::FileFlush: {
+            assert_stack_has(1);
+            auto file_id = stack_pop().as_int().value;
+            auto fp = this->open_files.find(file_id);
+            if (fp == this->open_files.end()) {
+                std::cerr << std::format("error: no open file {}\n", file_id);
+                std::exit(1);
+            }
+            std::fflush(fp->second);
+            stack_push(Null());
+            break;
+        }
+        case Builtin::FileEof: {
+            assert_stack_has(1);
+            auto file_id = stack_pop().as_int().value;
+            auto fp = this->open_files.find(file_id);
+            if (fp == this->open_files.end()) {
+                std::cerr << std::format("error: no open file {}\n", file_id);
+                std::exit(1);
+            }
+            stack_push(Bool(std::feof(fp->second) != 0));
+            break;
+        }
+        default:
+            break;
     }
 }
+
 auto VM::stack_repr_string(size_t max_items) const -> std::string
 {
     auto result = std::string();

runtime/vm.hpp

@@ -6,6 +6,7 @@
 #include "value.hpp"
 #include <cstddef>
 #include <cstdint>
+#include <cstdio>
 #include <string>
 #include <vector>
 
@@ -175,6 +176,9 @@ public:
 
 private:
     void run_builtin(Builtin builtin_id);
+    void run_string_builtin(Builtin builtin_id);
+    void run_array_builtin(Builtin builtin_id);
+    void run_file_builtin(Builtin builtin_id);
 
     inline void step() { this->pc += 1; }
 
@@ -243,6 +247,13 @@ private:
     SourcePos current_pos = { 0, 1, 1 };
     int64_t instruction_counter = 0;
 
+    int32_t file_id_counter = 3;
+    std::unordered_map<int32_t, FILE*> open_files {
+        { 0, stdin },
+        { 1, stdout },
+        { 2, stderr },
+    };
+
     bool halt = false;
 
     FlameGraphBuilder flame_graph;
@@ -250,5 +261,6 @@ private:
 };
 
 auto maybe_op_to_string(uint32_t value) -> std::string;
+auto maybe_builtin_to_string(uint32_t value) -> std::string;
 
 }