Ruckfish

Ruckfish is an esoteric programming language created by User:TheCanon2. Ruckfish is a variant of Ruck and by extension a variant of brainfuck, but with syntax that resembles Deadfish.

Commands

Like Ruck, and like brainfuck, Ruckfish has an infinitely long tape of 8-bit cells. Ruckfish has 5 commands.

Command	Ruck equivalent
i	+
d	>
s	[
o	]
h	<

Like Ruck, Ruckfish accepts an input at the beginning of a program. The EOF prints the tape as ASCII characters.

Examples

Hello, World!

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Truth machine

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If the input is a 1, it will write 1 to the tape indefinitely but it will not output.

Cat

Due to the way Ruckfish handles I/O, no code is needed in order to write a cat program.

Implementations

The following Python script is an interpreter.

tape = [0]
for i in range(0, 65536): # Expand
    tape.append(0)
pointer = 32768
prgm = input('>Ruck ')
init = input('>i ')
for i in range(32768, len(init)+32768): # Expand
    tape[i] = ord(init[i-32768]) # Expand
# Executes the program
loop_table = {}
loop_stack = []
for ip, inst in enumerate(prgm):
    if inst == "s":
        loop_stack.append(ip)
    elif inst == "o":
        loop_beginning_index = loop_stack.pop()
        loop_table[loop_beginning_index] = ip
        loop_table[ip] = loop_beginning_index
inst = 0
while inst < len(prgm):
    if prgm[inst] == "i":
        tape[pointer] += 1
        tape[pointer] %= 256
    elif prgm[inst] == "h":
        pointer -= 1
    elif prgm[inst] == "d":
        pointer += 1
    elif prgm[inst] == "s":
        if not tape[pointer]:
            inst = loop_table[inst]
    elif prgm[inst] == "o":
        if tape[pointer]:
            inst = loop_table[inst]
    else: pass
    inst += 1
pointer = 32768 # Expand
while tape[pointer]:
    print(chr(tape[pointer]), end="")
    pointer += 1

64K implementation, but it can be expanded.

The following Python script converts a program from Ruck to Ruckfish.

ruck = input('>ruck ')
ruckfish = [""]
for inst in range(0, len(ruck)):
    if ruck[inst] == "+":
        ruckfish.append("i")
    elif ruck[inst] == ">":
        ruckfish.append("d")
    elif ruck[inst] == "[":
        ruckfish.append("s")
    elif ruck[inst] == "]":
        ruckfish.append("o")
    elif ruck[inst] == "<":
        ruckfish.append("h")
    else: pass
ruckfish = ''.join(ruckfish)
print(ruckfish)