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#include <stdio.h>
#include <string.h>
#include <grass/rowio.h>
/*!
* \brief write a row
*
* Rowio_put()
* writes the buffer <b>buf</b>, which holds the data for row <b>n</b>, into
* the ROWIO structure <b>r.</b> If the row requested is currently in memory,
* the buffer is simply copied into the structure and marked as having been
* changed. It will be written out later. Otherwise it is written immediately.
* Note that when the row is finally written to disk, the <b>putrow()</b>
* routine specified in <i>rowio_setup</i> is called to write row <b>n</b>
* to the file. <b>rowio_flush</b> ( r) force pending updates to disk ROWIO *r;
* Rowio_flush() forces all rows modified by <i>rowio_put</i> to be written
* to the file. This routine must be called before closing the file or releasing
* the rowio structure if rowio_put() has been called.
*
* \param r
* \param buf
* \param n
* \return int
*/
int rowio_put(ROWIO * R, const void *buf, int row)
{
int i;
if (row < 0)
return 0;
for (i = 0; i < R->nrows; i++)
if (row == R->rcb[i].row) {
memcpy(R->rcb[i].buf, buf, R->len);
R->rcb[i].dirty = 1;
return 1;
}
return ((*R->putrow) (R->fd, buf, row, R->len));
}
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