Add strset_truncated which sets as much of the string as possible

src/simply/simply_ui.c

@@ -144,7 +144,7 @@ void simply_ui_set_style(SimplyUi *self, int style_index) {
 void simply_ui_set_text(SimplyUi *self, SimplyUiTextfieldId textfield_id, const char *str) {
   SimplyUiTextfield *textfield = &self->ui_layer.textfields[textfield_id];
   char **str_field = &textfield->text;
-  strset(str_field, str);
+  strset_truncated(str_field, str);
   mark_dirty(self);
 }
 

src/util/string.h

@@ -8,29 +8,41 @@ static inline bool is_string(const char *str) {
   return str && str[0];
 }
 
-static inline char *strdup2(const char *str) {
+static inline char *strndup2(const char *str, size_t n) {
   if (!str) {
     return NULL;
   }
 
-  size_t n = strlen(str);
   char *buffer = malloc(n + 1);
   if (!buffer) {
     return NULL;
   }
 
   strncpy(buffer, str, n + 1);
+  buffer[n] = '\0';
   return buffer;
 }
 
-static inline void strset(char **str_field, const char *str) {
+static inline char *strdup2(const char *str) {
+  return strndup2(str, strlen(str));
+}
+
+static inline bool strnset(char **str_field, const char *str, size_t n) {
   free(*str_field);
+  *str_field = NULL;
 
   if (!is_string(str)) {
-    *str_field = NULL;
-    return;
+    return true;
   }
 
-  *str_field = strdup2(str);
+  return (*str_field = strndup2(str, n));
 }
 
+static inline bool strset(char **str_field, const char *str) {
+  return strnset(str_field, str, strlen(str));
+}
+
+static inline void strset_truncated(char **str_field, const char *str) {
+  size_t n = strlen(str);
+  for (; !strnset(str_field, str, n) && n > 1; n /= 2) {}
+}