Zig 0.17.0-dev (Split by item)

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replacementSize

Calculate the size needed in an output buffer to perform a replacement. The needle must not be empty.

mem.replacementSize

pub fn replacementSize(comptime T: type, input: []const T, needle: []const T, replacement: []const T) usize

File

lib/std/mem.zig:4164

Code

pub fn replacementSize(comptime T: type, input: []const T, needle: []const T, replacement: []const T) usize {
    // Empty needle will loop forever.
    assert(needle.len > 0);

    var i: usize = 0;
    var size: usize = input.len;
    while (i < input.len) {
        if (mem.startsWith(T, input[i..], needle)) {
            size = size - needle.len + replacement.len;
            i += needle.len;
        } else {
            i += 1;
        }
    }

    return size;
}