116 lines
2.6 KiB
Mathematica
116 lines
2.6 KiB
Mathematica
#!/usr/bin/env monkey-lang
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fill := fn(x, i) {
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xs := []
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while (i > 0) {
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xs = push(xs, x)
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i = i - 1
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}
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return xs
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}
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buildJumpMap := fn(program) {
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stack := []
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map := {}
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n := 0
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while (n < len(program)) {
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if (program[n] == "[") {
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stack = push(stack, n)
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}
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if (program[n] == "]") {
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start := pop(stack)
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map[start] = n
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map[n] = start
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}
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n = n + 1
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}
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return map
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}
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ascii_table := "\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
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ord := fn(s) {
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return ascii_table[s]
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}
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chr := fn(x) {
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if (x < 0) {
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return "??"
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}
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if (x > 127) {
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return "??"
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}
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return ascii_table[x]
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}
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read := fn() {
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buf := input()
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if (len(buf) > 0) {
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return ord(buf[0])
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}
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return 0
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}
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write := fn(x) {
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println(chr(x))
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}
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VM := fn(program) {
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jumps := buildJumpMap(program)
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ip := 0
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dp := 0
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memory := fill(0, 32)
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while (ip < len(program)) {
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op := program[ip]
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if (op == ">") {
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dp = dp + 1
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} else if (op == "<") {
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dp = dp - 1
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} else if (op == "+") {
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if (memory[dp] < 255) {
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memory[dp] = memory[dp] + 1
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} else {
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memory[dp] = 0
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}
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} else if (op == "-") {
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if (memory[dp] > 0) {
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memory[dp] = memory[dp] - 1
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} else {
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memory[dp] = 255
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}
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} else if (op == ".") {
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write(memory[dp])
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} else if (op == ",") {
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memory[dp] = read()
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} else if (op == "[") {
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if (memory[dp] == 0) {
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ip = jumps[ip]
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}
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} else if (op == "]") {
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if (memory[dp] != 0) {
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ip = jumps[ip]
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}
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}
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ip = ip + 1
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}
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println("memory:")
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println(memory)
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println("ip:")
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println(ip)
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println("dp:")
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println(dp)
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}
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// Hello World
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program := "++++++++ [ >++++ [ >++ >+++ >+++ >+ <<<<- ] >+ >+ >- >>+ [<] <- ] >>. >---. +++++++..+++. >>. <-. <. +++.------.--------. >>+. >++."
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// 2 + 5
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// program := "++> +++++ [<+>-] ++++++++ [<++++++>-] < ."
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VM(program) |