307    int                        char_storage;  member
1102       if (state->undo_rec[0].char_storage >= 0) {  in stb_textedit_discard_undo()
1108             if (state->undo_rec[i].char_storage >= 0)  in stb_textedit_discard_undo()
1109 …           state->undo_rec[i].char_storage -= n; // @OPTIMIZE: get rid of char_storage and infer it  in stb_textedit_discard_undo()
1126       if (state->undo_rec[k].char_storage >= 0) {  in stb_textedit_discard_redo()
1133             if (state->undo_rec[i].char_storage >= 0)  in stb_textedit_discard_redo()
1134                state->undo_rec[i].char_storage += n;  in stb_textedit_discard_redo()
1185       r->char_storage = -1;  in stb_text_createundo()
1188       r->char_storage = state->undo_char_point;  in stb_text_createundo()
1190       return &state->undo_char[r->char_storage];  in stb_text_createundo()
1204    r->char_storage = -1;  in stb_text_undo()
1237          r->char_storage = s->redo_char_point - u.delete_length;  in stb_text_undo()
1242             s->undo_char[r->char_storage + i] = STB_TEXTEDIT_GETCHAR(str, u.where + i);  in stb_text_undo()
1252       STB_TEXTEDIT_INSERTCHARS(str, u.where, &s->undo_char[u.char_storage], u.insert_length);  in stb_text_undo()
1279    u->char_storage = -1;  in stb_text_redo()
1290          u->char_storage = s->undo_char_point;  in stb_text_redo()
1295             s->undo_char[u->char_storage + i] = STB_TEXTEDIT_GETCHAR(str, u->where + i);  in stb_text_redo()
1303       STB_TEXTEDIT_INSERTCHARS(str, r.where, &s->undo_char[r.char_storage], r.insert_length);  in stb_text_redo()