pusshhhhhh

hello.b

@@ -0,0 +1 @@
+++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++.

main.odin

@@ -0,0 +1,123 @@
+package main
+
+import "core:fmt"
+import "core:mem/virtual"
+import "core:os"
+import "core:strings"
+
+//MEMORY_SIZE :: 1 << 16
+MEMORY_SIZE :: 1024 * 2
+
+open_bf_file :: proc(filepath: string) -> (data: []byte) {
+	ok: bool
+	data, ok = os.read_entire_file(filepath)
+	if !ok {
+		fmt.eprintfln("ERROR: Cannot read file: %s", filepath)
+		return
+	}
+	return data
+}
+
+build_bracket_matching_table :: proc(
+	bracket_map: ^map[int]int,
+	stack: ^[dynamic]int,
+	data: []byte,
+) {
+	program := string(data)
+	for index in 0 ..< len(program) {
+		switch program[index] {
+		case 91:
+			// [ (start loop)
+			append(stack, index)
+		case 93:
+			// ] (end loop)
+			if len(stack) > 0 {
+				start := pop(stack)
+				bracket_map[start] = index
+				bracket_map[index] = start
+			}
+		case:
+			continue
+		}
+	}
+}
+
+run_bf_file :: proc(
+	tape: ^[MEMORY_SIZE]byte,
+	bracket_map: ^map[int]int,
+	stack: ^[dynamic]int,
+	data: []byte,
+) {
+	program := string(data)
+	ptr: i64
+
+	for ip := 0; ip < len(program); ip += 1 {
+		switch program[ip] {
+		case 43:
+			// + (increment cell value)
+			tape[ptr] += 1
+		case 45:
+			// - (decrement cell value)
+			tape[ptr] -= 1
+		case 62:
+			// > (move pointer right)
+			ptr += 1
+		case 60:
+			// < (move pointer left)
+			ptr -= 1
+		case 46:
+			// . (output cell value)
+			output := fmt.tprintf("%c", tape[ptr])
+			fmt.print(output)
+		case 44:
+		// , (input to cell)
+
+		case 91:
+			// [ (start loop)
+			if tape[ptr] == 0 {
+				//jump forward to the matching ']'
+				ip = bracket_map[ip]
+			}
+		case 93:
+			// ] (end loop)
+			if tape[ptr] != 0 {
+				//jump back to the matching '['
+				ip = bracket_map[ip]
+			}
+		case:
+			continue
+		}
+	}
+}
+
+main :: proc() {
+	//Set up arena allocator
+	arena: virtual.Arena
+	arena_allocator := virtual.arena_allocator(&arena)
+	defer virtual.arena_destroy(&arena)
+
+	//handle args
+	filename: string
+
+	if len(os.args) < 2 {
+		fmt.printfln("Usage:\n %s [file]", os.args[0])
+		return
+	}
+
+	filename = os.args[1]
+
+	//check if the file is a valid bf file
+	if !strings.has_suffix(filename, ".b") {
+		fmt.eprintfln("ERROR: File %s does not have a valid b extention (.b)", filename)
+		return
+	}
+
+	file := open_bf_file(filename)
+	bracket_map := make(map[int]int, allocator = arena_allocator)
+	stack := new([dynamic]int, allocator = arena_allocator) //returns a pointer
+	tape := new([MEMORY_SIZE]byte, allocator = arena_allocator)
+
+	build_bracket_matching_table(&bracket_map, stack, file)
+	run_bf_file(tape, &bracket_map, stack, file)
+
+}

random.b

@@ -0,0 +1 @@
+->+>+++>>+>++>+>+++>>+>++>>>+>+>+>++>+>>>>+++>+>>++>+>+++>>++>++>>+>>+>++>++>+>>>>+++>+>>>>++>++>>>>+>>++>+>+++>>>++>>++++++>>+>>++>+>>>>+++>>+++++>>+>+++>>>++>>++>>+>>++>+>+++>>>++>>+++++++++++++>>+>>++>+>+++>+>+++>>>++>>++++>>+>>++>+>>>>+++>>+++++>>>>++>>>>+>+>++>>+++>+>>>>+++>+>>>>+++>+>>>>+++>>++>++>+>+++>+>++>++>>>>>>++>+>+++>>>>>+++>>>++>+>+++>+>+>++>>>>>>++>>>+>>>++>+>>>>+++>+>>>+>>++>+>++++++++++++++++++>>>>+>+>>>+>>++>+>+++>>>++>>++++++++>>+>>++>+>>>>+++>>++++++>>>+>++>>+++>+>+>++>+>+++>>>>>+++>>>+>+>>++>+>+++>>>++>>++++++++>>+>>++>+>>>>+++>>++++>>+>+++>>>>>>++>+>+++>>+>++>>>>+>+>++>+>>>>+++>>+++>>>+[[->>+<<]<+]+++++[->+++++++++<]>.[+]>>[<<+++++++[->+++++++++<]>-.------------------->-[-<.<+>>]<[+]<+>>>]<<<[-[-[-[>>+<++++++[->+++++<]]>++++++++++++++<]>+++<]++++++[->+++++++<]>+<<<-[->>>++<<<]>[->>.<<]<<]

test.b

@@ -0,0 +1,9 @@
+++++++++++
+++++++++++
+++++++++++
+++++++++++
+++++++++++
+++++++++++
++++++
+.
+#A