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Rev 1575 Rev 1576
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"xor ax, ax" \
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"xor ax, ax" \
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"done:" \
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"done:" \
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parm [bx] [dx] [cx] [di] \
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parm [bx] [dx] [cx] [di] \
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value [ax]
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value [ax]
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unsigned short dos_resizeblock(unsigned short siz, unsigned short segn);
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#pragma aux dos_resizeblock = \
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"mov ah, 0x4a" \
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"int 0x21" \
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"jc done" \
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"xor ax, ax" \
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"done:" \
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parm [bx] [es] \
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value [ax]
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/*****************************************************************************
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/*****************************************************************************
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 * functions                                                                 *
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 * functions                                                                 *
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 *****************************************************************************/
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 *****************************************************************************/
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static int curline_resize(struct file *db, unsigned short newsiz) {
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static int curline_resize(struct file *db, unsigned short newsiz) {
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  struct line far *newptr;
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  struct line far *newptr;
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  /* try resizing the block (much faster) */
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  /* try resizing the block (much faster) */
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  if (mdr_dos_resizeblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor)) == 0) return(0);
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  if (dos_resizeblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor)) == 0) return(0);
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  /* create a new block and copy data over */
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  /* create a new block and copy data over */
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  newptr = line_calloc(newsiz);
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  newptr = line_calloc(newsiz);
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  if (newptr == NULL) return(-1);
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  if (newptr == NULL) return(-1);
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  fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
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  fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);