What's the easiest way to do string search and replace in SystemVerilog?
For example, I have:
string hdl_path = "DUT.my_red39";
How do I create a new string
that replaces red with blue ?
You can use one of the SystemVerilog utility libraries that have been created recently.
cl::text::replace
method svlib_pkg::Str::replace
method Alternatively, you could do it with plain SystemVerilog by comparing individual characters:
function automatic string search_replace(string original, string old, string replacement);
// First find the index of the old string
int start_index = 0;
int original_index = 0;
int replace_index = 0;
bit found = 0;
while(1) begin
if (original[original_index] == old[replace_index]) begin
if (replace_index == 0) begin
start_index = original_index;
end
replace_index++;
original_index++;
if (replace_index == old.len()) begin
found = 1;
break;
end
end else if (replace_index != 0) begin
replace_index = 0;
original_index = start_index + 1;
end else begin
original_index++;
end
if (original_index == original.len()) begin
// Not found
break;
end
end
if (!found) return original;
return {
original.substr(0, start_index-1),
replacement,
original.substr(start_index+old.len(), original.len()-1)
};
endfunction
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