mips32 - access file in mips using mars tool -


i'm trying access on file using mips instruction.
want read file line line not of file @ time code(1) not work.

also want write file , not overwrite!
can 1 me?

code:

open file writing 

li   $v0, 13       # system call open file la   $a0, file      # board file name li   $a1, 0        # open reading li   $a2, 0 syscall            # open file (file descriptor returned in $v0) move $s6, $v0      # save file descriptor

read file 

li   $v0, 14       # system call read file   move $a0, $s6      # file descriptor    la   $a1, buffer   # address of buffer read   li   $a2, 40     # hardcoded buffer length   syscall            # read file

close file 

li   $v0, 16       # system call close file   move $a0, $s6      # file descriptor close   syscall            # close file

i want read file line line not of file @ time code(1) not work.

read chunks of data buffer (e.g. few kilobytes). process buffer line-by-line (by looking linefeed characters), , read more data file when you've reached end of buffer.

also want write file , not overwrite!

set flags ($a1) 9 when opening file (syscall 13). corresponds "write-only create , append" (see this mars syscall reference).


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