| 96,18 → 96,24 |
|---|
| } |
| |
| |
| static struct line far *line_resize(struct line far *ptr, unsigned short newsiz) { |
| static signed char curline_resize(struct file far *db, unsigned short newsiz) { |
| unsigned int maxavail; |
| struct line far *newptr; |
| |
| /* try resizing the block (faster) */ |
| if (_dos_setblock((sizeof(struct line) + newsiz) / 16 + 1, FP_SEG(ptr), &maxavail) == 0) return(ptr); |
| if (_dos_setblock((sizeof(struct line) + newsiz) / 16 + 1, FP_SEG(db->cursor), &maxavail) == 0) return(0); |
| |
| /* create a new block and copy data over */ |
| newptr = line_calloc(newsiz); |
| if (newptr == NULL) return(NULL); |
| _fmemmove(newptr, ptr, sizeof(struct line) + ptr->len); |
| return(newptr); |
| if (newptr == NULL) return(-1); |
| _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len); |
| |
| /* rewire the linked list */ |
| db->cursor = newptr; |
| if (newptr->next) newptr->next->prev = newptr; |
| if (newptr->prev) newptr->prev->next = newptr; |
| |
| return(0); |
| } |
| |
| |
| 177,18 → 183,11 |
|---|
| |
| /* append a nul-terminated string to line at cursor position */ |
| static int line_append(struct file *f, const char far *buf, unsigned short len) { |
| struct line far *n; |
| if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */ |
| n = line_resize(f->cursor, f->cursor->len + len); |
| if (n == NULL) return(-1); |
| f->cursor = n; |
| if (curline_resize(f, f->cursor->len + len) != 0) return(-1); |
| _fmemmove(f->cursor->payload + f->cursor->len, buf, len); |
| f->cursor->len += len; |
| |
| /* rewire the linked list */ |
| if (f->cursor->next) f->cursor->next->prev = f->cursor; |
| if (f->cursor->prev) f->cursor->prev->next = f->cursor; |
| |
| return(0); |
| } |
| |
| 455,16 → 454,15 |
|---|
| } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */ |
| struct line far *nextline = db->cursor->next; |
| if (db->cursor->next->len > 0) { |
| void far *newptr = line_resize(db->cursor, db->cursor->len + db->cursor->next->len + 1); |
| if (newptr != NULL) { |
| db->cursor = newptr; |
| if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) { |
| _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1); |
| db->cursor->len += db->cursor->next->len; |
| } |
| } |
| |
| db->cursor->next = db->cursor->next->next; |
| db->cursor->next->prev = db->cursor; |
| if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor; /* in case realloc changed my pointer */ |
| |
| line_free(nextline); |
| uidirty.from = db->cursorposy; |
| uidirty.to = 0xff; |
| 660,14 → 658,9 |
|---|
| |
| |
| static void insert_in_line(struct file *db, const char *databuf, unsigned short len) { |
| struct line far *n; |
| n = line_resize(db->cursor, db->cursor->len + len); |
| if (n != NULL) { |
| if (curline_resize(db, db->cursor->len + len) == 0) { |
| unsigned short off = db->xoffset + db->cursorposx; |
| db->modflag = 1; |
| if (n->prev) n->prev->next = n; |
| if (n->next) n->next->prev = n; |
| db->cursor = n; |
| _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1); |
| db->cursor->len += len; |
| uidirty.from = db->cursorposy; |