Ruby BF compiler

bf.rb

preamble = <<'EOF'
#include <stdint.h>
#include <stdio.h>

int main(){
#define S 65536
uint8_t t[S] = {0};
uint8_t m[S] = {0};
uint16_t p = 0, f = 0, z = 0;
int i, q = 0, d = 0, g = 0;
#define D for(z=0;z<12+(f+11)/12*12;){if(z%12==0){printf("%04i:  ",z);}if(z==p)printf("\33[32;1m");if(m[z])printf("\33[41m");printf("%03i\33[0m  ",t[z]);if(++z%12==0){for(q=0;q<12;q++){g=z-12+q;printf("\33[30;%im",g==p?46:m[g]?41:47);printf("%c",(i=t[z-12+q])<33||i>126?46:i);}puts("\33[0m");}}
EOF

$line_number = 1
$col_number = 1
$output = preamble

def echo(str)
    $output += str + "\n"
end
File.read(ARGV[0]).chars.each { |char|
    if char == "\n"
        $line_number += 1
        $col_number = 1
        next
    end
    case char
        when ">"
            echo '++p;f<=p&&(f=p);'
        when "<"
            echo '--p;'
        when "+"
            echo '++t[p];'
        when "-"
            echo '--t[p];'
        when ","
            echo 'i=getchar(),t[p]=i*(i>0);'
        when "."
            echo 'putchar(t[p]);'
        when "["
            echo 'while(t[p]){'
        when "]"
            echo '}'
        when "#"
            echo "printf(\"\\33[33mDump %i: (at line %i, char %i)\\33[0m\\n\", d++, #{$line_number}, #{$col_number}); D"
        when "@"
            echo "m[p]=1-m[p];"
    end
    $col_number += 1
}


echo "printf(\"\\33[33mFinal dump:\\33[0m\\n\");D;return 0;}"

File.write "#{ARGV[0]}.c", $output
`cc -O3 #{ARGV[0]}.c -o #{ARGV[0]}.exe`

system("./#{ARGV[0]}.exe")
# cc -O3 -o "$1.exe" "$1.c"
# "./$1.exe"
# rm "$1.c"
# ./test.bat "$1"