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asciiToInteger

stdlib.asciiToInteger

fn asciiToInteger(comptime T: type, buf: [*:0]const u8) T

File

lib/c/stdlib.zig:95

Code

fn asciiToInteger(comptime T: type, buf: [*:0]const u8) T {
    comptime assert(std.math.isPowerOfTwo(@bitSizeOf(T)));

    var current = buf;
    while (std.ascii.isWhitespace(current[0])) : (current += 1) {}

    // The behaviour *is* undefined if the result cannot be represented
    // but as they are usually called with untrusted input we can just handle overflow gracefully.
    if (current[0] == '-') return parseDigitsWithSignGenericCharacter(T, u8, current + 1, null, 10, .neg) catch std.math.minInt(T);
    if (current[0] == '+') current += 1;
    return parseDigitsWithSignGenericCharacter(T, u8, current, null, 10, .pos) catch std.math.maxInt(T);
}