utf-8: initial support

src/utils/utf8.c

@@ -1,9 +1,40 @@
+#include <ncursesw/ncurses.h>
 #include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <wchar.h>
 
 size_t count_utf8_code_points(const char *s) {
-    size_t count = 0;
-    while (*s) {
-        count += (*s++ & 0xC0) != 0x80;
-    }
-    return count;
+  size_t count = 0;
+  while (*s) {
+    count += (*s++ & 0xC0) != 0x80;
+  }
+  return count;
+}
+
+int64_t convert_utf8_to_wide(const char *utf8_str, wchar_t **restrict wide_str,
+                             size_t *restrict len) {
+  // Step 1: Convert UTF-8 (MBCS) to wchar_t (wide)
+  size_t wide_len =
+      count_utf8_code_points(utf8_str); // Get required length (-1 on error)
+  if (wide_len == (size_t)-1) {
+    *len = 0;
+    perror("mbstowcs failed");
+    return 1;
+  }
+  *wide_str =
+      malloc((wide_len + 1) * sizeof(wchar_t)); // +1 for null terminator
+  mbstowcs(*wide_str, utf8_str, wide_len + 1);  // Perform conversion
+  *len = wide_len;
+  return 0;
+}
+
+int64_t curs_printw(WINDOW *win, int64_t y, int64_t x, char *const utf8_str) {
+  wchar_t *wname = NULL;
+  size_t nsize = 0;
+  convert_utf8_to_wide(utf8_str, &wname, &nsize);
+  mvwaddwstr(win, y, x, wname);
+  free(wname);
+  return nsize;
 }

src/utils/utf8.h

@@ -1,7 +1,11 @@
 #ifndef UTF8_H
 #define UTF8_H
 
+#include <ncursesw/ncurses.h>
 #include <stddef.h>
+#include <stdint.h>
 size_t count_utf8_code_points(const char *s);
-
+int64_t convert_utf8_to_wide(const char *utf8_str, wchar_t **restrict wide_str,
+                             size_t *restrict len);
+int64_t curs_printw(WINDOW *win, int64_t y, int64_t x, char *const utf8_str);
 #endif