#ifndef STRINGS_H
#define STRINGS_H

#define str8_lit(s) str8((U8 *)(s), sizeof(s)-1)

String8
str8(U8 *str, U64 size)
{
    String8 result = { str, size };
    return(result);
}

B32
str8_char_is_slash(U8 c)
{
    return((c == '/') || (c == '\\'));
}

U8
str8_char_uppercase(U8 c)
{
    if (c >= 'a' && c <= 'z') {
        c += 'A'-'a';
    }
    return(c);
}

U8
str8_char_lowercase(U8 c)
{
    if (c >= 'A' && c <= 'Z') {
        c -= 'A'-'a';
    }
    return(c);
}

String8
str8_range(U8 *first, U8 *second)
{
    String8 result = { first, (U64)(second-first) };
    return(result);
}

String8
str8_cstring(U8 *cstr)
{
    U8 *ptr = cstr;
    for (; *ptr != 0; ++ptr);
    String8 result = str8_range(cstr, ptr);
    return(result);
}

String8
str8_prefix(String8 str, U64 size)
{
    U64 clamped = ClampTop(size, str.size);
    String8 result = { str.str, clamped };
    return(result);
}

String8
str8_chop(String8 str, U64 amount)
{
    U64 clamped = ClampTop(amount, str.size);
    U64 remaining = str.size-clamped;
    String8 result = { str.str, remaining };
    return(result);
}

String8
str8_posfix(String8 str, U64 size)
{
    U64 clamped = ClampTop(size, str.size);
    U64 skip = str.size-clamped;
    String8 result = { str.str+skip, clamped };
    return(result);
}

String8
str8_skip(String8 str, U64 amount)
{
    U64 clamped = ClampTop(amount, str.size);
    String8 result = { str.str+clamped, str.size-clamped };
    return(result);
}

String8
str8_substr_pos(String8 str, U64 start, U64 end)
{
    U64 start_clamped = ClampTop(start, str.size);
    U64 end_clamped = ClampTop(end, str.size);
    String8 result = { str.str+start_clamped, end_clamped-start_clamped };
    return(result);
}

String8
str8_substr_size(String8 str, U64 start, U64 size)
{
    String8 result = str8_substr_pos(str, start, start+size);
    return(result);
}

#endif /* STRINGS_H */