Brainfuck to C translator written in Lua

brainfuck-to-c.lua

local brainfuckToC_map = {
    ['>'] = '++ptr;',
    ['<'] = '--ptr;',
    ['+'] = '++*ptr;',
    ['-'] = '--*ptr;',
    ['.'] = 'putchar(*ptr);',
    [','] = '*ptr=getchar();',
    ['['] = 'while (*ptr) {',
    [']'] = '}',
}

local function brainfuckToC(bf_code)
    local c_code = bf_code:gsub('.', function(op)
        return brainfuckToC_map[op] or ''
    end)
    return c_code
end

local PROLOGUE = [[
#include <stdio.h>
int main() {
    #define TAPE_SIZE 30000
    char array[TAPE_SIZE] = {0};
    char *ptr=array;
]]

local EPILOGUE = [[
    return 0;
}
]]

print(PROLOGUE)
for line in io.lines() do
    print(brainfuckToC(line))
end
print(EPILOGUE)