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#ifndef _AL_WSTR_H
#define _AL_WSTR_H
#include "lib.h"
#include "str.h"
#include <wchar.h>
typedef struct {
u32 len;
u32 alloc;
wchar_t *__sized_by(alloc) data;
} wstr;
#define al_wstr_zero() (wstr){ 0, 0, NULL }
#define al_wstr_at(w, i) (w)->data[i]
#define al_wstr_atr(w, i) (w)->data[(w)->len + i]
#define al_wide_string_if_literal(w) ((wchar_t *)(L"" w)) // use al_wstr_cr for runtime.
#define al_wstr_c(w) (&((wstr){ (u32)((sizeof(w) / sizeof(wchar_t)) - 1), 0, al_wide_string_if_literal(w) }))
#define al_wstr_cr(w) (&((wstr){ (u32)wcslen(w), 0, ((wchar_t *)(w)) })) // runtime
#define al_wstr_w(w, i, n) (&((wstr){ ((u32)(n)), 0, &al_wstr_at(w, i) }))
#define al_wstr_substr(w, start, end) al_wstr_w(w, start, ((end) - (start)))
#define AL_WSTR_FMT "%ls"
#define AL_WSTR_PRINTF(w) (w)->data
AL_UNUSED_FUNCTION_PUSH
static inline s32 al_wchar_width(wchar_t wc)
{
#ifdef AL_HAVE_WIDE_STRING_WIDTH
return wcwidth(wc);
#else
(void)wc;
al_assert_and_return(0);
#endif
}
static inline void al_wstr_free(wstr *w)
{
if (w->alloc > 0) al_free(w->data);
}
static inline u32 al_wstr_reserve(wstr *w, u32 size)
{
if (size <= w->alloc) {
return w->alloc;
}
size = size < al_grow_step ? al_next_power_of_two(size) :
(size + al_grow_step) & ~al_grow_step;
w->data = (wchar_t *)(!w->data ? al_malloc(size) : al_realloc(w->data, size));
al_assert(w->data);
return size;
}
static inline void al_wstr_sized(wstr *w, u32 size)
{
*w = al_wstr_zero();
w->alloc = al_wstr_reserve(w, size * sizeof(wchar_t));
}
static inline void al_wstr_clone(wstr *dest, wstr *src)
{
u32 len = src->len + 1;
al_wstr_sized(dest, len);
al_memcpy(dest->data, src->data, len * sizeof(wchar_t));
dest->len = src->len;
}
static inline bool al_wstr_from_cstr(wstr *w, char *c)
{
#ifdef AL_HAVE_WIDE_STRING
mbstate_t mbstate = { 0 };
size_t len = mbsrtowcs(NULL, (const char **)&c, 0, &mbstate);
if (len == (size_t)-1) {
return false;
}
al_wstr_sized(w, (u32)(len + 1));
w->len = (u32)mbsrtowcs(w->data, (const char **)&c, len, &mbstate);
al_assert(w->len == (u32)len);
w->data[w->len] = L'\0';
return true;
#else
(void)c;
(void)w;
al_assert_and_return(false);
#endif
}
static inline void al_wstr_from_str(wstr *w, str *s)
{
char *c_str = al_str_to_c_str(s);
al_wstr_from_cstr(w, c_str);
al_free(c_str);
}
static inline bool al_wstr_to_str(wstr *w, str *s)
{
// This is broken on windows. locale issue?
#ifdef AL_HAVE_WIDE_STRING
wchar_t *data = w->data;
mbstate_t mbstate = { 0 };
size_t len = wcsrtombs(NULL, (const wchar_t **)&w->data, 0, &mbstate);
if (len == (size_t)-1) {
return false;
}
al_str_sized(s, (u32)len);
// Excludes the null terminator.
s->len = (u32)wcsrtombs(s->data, (const wchar_t **)&w->data, len, &mbstate);
al_assert(s->len == (u32)len);
w->data = data;
return true;
#else
(void)s;
(void)w;
al_assert_and_return(false);
#endif
}
static inline s32 al_wstr_width(wstr *w)
{
#ifdef AL_HAVE_WIDE_STRING_WIDTH
return wcswidth(w->data, w->len);
#else
(void)w;
al_assert_and_return(0);
#endif
}
static inline s32 al_wstr_cmp(wstr *w, wstr *c, u32 start, u32 len)
{
#ifdef AL_HAVE_WIDE_STRING
return wcsncmp(&al_wstr_at(w, start), c->data, len);
#else
(void)w;
(void)c;
(void)start;
(void)len;
al_assert_and_return(0);
#endif
}
static inline s32 al_wstr_find(wstr *w, wchar_t c)
{
for (s32 i = 0; i < (s32)w->len; i++) {
if (al_wstr_at(w, i) == c) {
return i;
}
}
return -1;
}
static inline s32 al_wstr_rfind(wstr *w, wchar_t c)
{
for (s32 i = (s32)w->len - 1; i >= 0; i--) {
if (al_wstr_at(w, i) == c) {
return i;
}
}
return -1;
}
AL_UNUSED_FUNCTION_POP
#endif // _AL_WSTR_H
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