ksh insert element in array Post: 302628389

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Top Forums Shell Programming and Scripting ksh insert element in array Post 302628389 by rbatte1 on Monday 23rd of April 2012 11:40:00 AM

04-23-2012

Moderator

You may have to count your way along the array with two pointers. A source address and a target address for a replacement array. The source address gets incremented each time through a loop to copy an element from one to the other, but within the loop there would be an extra increment to the target address and an insert of the zero in the position you want. Something like this may assist:-

Code:

#!/bin/ksh
set -a source_array
set -a target_array

for i in 1 2 3 4 5 6 7 8 9 10 11 12
do                                  # Just loading something into the source.
   source_array[$i]="a${i}a${i}"    # You should already have your data loaded.
done

src_addr=1 ; trg_addr=1

while [ $src_addr -le ${#source_array[*]} ]
do
   target_array[$trg_addr]="${source_array[$src_addr]}"
   echo "Setting target array element $trg_addr from source array element $src_addr value ${source_array[$src_addr]}"
   ((src_addr=$src_addr+1))
   ((trg_addr=$trg_addr+1))

   if [ $trg_addr = 6 ]              # For the required insert
   then
      target_array[$trg_addr]=0    # Set value
      echo "Setting target array element $trg_addr as zero."
      ((trg_addr=$trg_addr+1))   # ... and move pointer along one
   fi
done

I hope that this helps. It may well not be the most efficient way, but it depends how big an array you have and how many times you will run this.

Robin
Liverpool/Blackburn
UK

rbatte1

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LEARN ABOUT SUNOS

ddi_device_copy

ddi_device_copy(9F)					   Kernel Functions for Drivers 				       ddi_device_copy(9F)

NAME

       ddi_device_copy - copy data from one device register to another device register

SYNOPSIS

       #include <sys/ddi.h>
       #include <sys/sunddi.h>

       int  ddi_device_copy(ddi_acc_handle_t  src_handle,  caddr_t  src_addr, ssize_t src_advcnt, ddi_acc_handle_t dest_handle, caddr_t dest_addr,
       ssize_t dest_advcnt, size_t bytecount, uint_t dev_datasz);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       src_handle      The data access handle of the source device.

       src_addr        Base data source address.

       src_advcnt      Number of  dev_datasz units to advance on every access.

       dest_handle     The data access handle of the destination device.

       dest_addr       Base data destination address.

       dest_advcnt     Number of  dev_datasz units to advance on every access.

       bytecount       Number of bytes to transfer.

       dev_datasz      The size of each data word. Possible values are defined as: "15">DDI_DATA_SZ01_ACC 1 byte data size

		       DDI_DATA_SZ02_ACC       2 bytes data size

		       DDI_DATA_SZ04_ACC       4 bytes data size

		       DDI_DATA_SZ08_ACC       8 bytes data size

DESCRIPTION

       ddi_device_copy() copies  bytecount bytes from the source  address,  src_addr, to the  destination  address,   dest_addr.   The	attributes
       encoded	in  the  access handles, src_handle and  dest_handle, govern how data is actually copied from the  source to the destination. Only
       matching data sizes between the source and destination are supported.

       Data will automatically be translated to maintain a consistent  view between the source and the destination. The translation  may   involve
       byte-swapping if the source and the destination devices	have incompatible endian characteristics.

       The  src_advcnt and  dest_advcnt arguments specifies the number of  dev_datasz units to advance with each access to the device addresses. A
       value of  0 will use the same source and destination device address  on every access. A positive value increments the corresponding  device
       address by certain number of data size units in the next access.  On the other hand, a negative value decrements the device address.

       The dev_datasz argument determines the size of the data word on each access. The data size must be the same between the source and destina-
       tion.

RETURN VALUES

       ddi_device_copy() returns:

       DDI_SUCCESS	       Successfully transferred the data.

       DDI_FAILURE	       The byte count is not a multiple dev_datasz.

CONTEXT

       ddi_device_copy() can be called from user, kernel, or interrupt context.

SEE ALSO

       ddi_regs_map_free(9F), ddi_regs_map_setup(9F)

       Writing Device Drivers

SunOS 5.10							    15 Nov 1996 					       ddi_device_copy(9F)

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