Read each character from file and store in array

user_19388319 0
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I need to use Verilog to store each character from input file into an array.

I'm able to use $fgets to read each line, but I'm not sure how to break it down to each character.

Input file:

foo
bar 
joe
stack

main:

c = $fgetc(infile);
while(c != `EOF) begin
  r = ungetc(c,infile);
  $fgets(str,infile);
  c = $fgetc(infile);
  $display (%0s,str);
end

I want to store it into str so that [0]str[0] = f and so on.

system-verilog verilog fgets scanf
1 Answers

You can use $fscanf to read one line at a time, discarding the newline character. Since each line only has one word, store the word into a temporary string variable word. Then push each word into a queue of strings.

module tb;

int fd;
string word;
string str [$];

initial begin
    fd = $fopen("data.txt", "r");

    while (! $feof(fd)) begin
        void'($fscanf(fd, "%s\n", word));
        str.push_back(word);
    end

    $display("%s", str[0][0]);
    $display("%s", str[0][1]);
    $display("%s", str[0][2]);
end

endmodule

Prints:

f
o
o
user_1977580
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