#include "string_utils.h"

BOOLEAN is_space16(CHAR16 Ch)
{
    return (Ch == L' ' || Ch == L'\t');
}

CHAR16 ascii_lower16(CHAR16 Ch)
{
    if (Ch >= L'A' && Ch <= L'Z') {
        return (CHAR16)(Ch + 32);
    }
    return Ch;
}

BOOLEAN ascii_streq_ci(const CHAR16 *A, const CHAR16 *B)
{
    if (A == NULL || B == NULL) {
        return FALSE;
    }

    while (*A != L'\0' && *B != L'\0') {
        if (ascii_lower16(*A) != ascii_lower16(*B)) {
            return FALSE;
        }
        A++;
        B++;
    }

    return (*A == L'\0' && *B == L'\0');
}

void trim_spaces_inplace(CHAR16 *Cmd)
{
    UINTN start = 0;
    UINTN end = 0;
    UINTN i = 0;

    if (Cmd == NULL) {
        return;
    }

    while (Cmd[start] != L'\0' && is_space16(Cmd[start])) {
        start++;
    }

    end = start;
    while (Cmd[end] != L'\0') {
        end++;
    }

    while (end > start && is_space16(Cmd[end - 1])) {
        end--;
    }

    while (i < (end - start)) {
        Cmd[i] = Cmd[start + i];
        i++;
    }
    Cmd[i] = L'\0';
}