border.asm

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#name:
#studentID:

.data

#Must use accurate file path.
#file paths in MARS are relative to the mars.jar file.
# if you put mars.jar in the same folder as test2.txt and your.asm, input: should work.
input:	.asciiz "test1.txt"
output:	.asciiz "borded.pgm"	#used as output

borderwidth: .word 2    #specifies border width
buffer:  .space 2048		# buffer for upto 2048 bytes
newbuff: .space 2048
headerbuff: .space 2048  #stores header

#any extra data you specify MUST be after this line 


	.text
	.globl main

main:	la $a0,input		#readfile takes $a0 as input
	jal readfile


	la $a0,buffer		#$a1 will specify the "2D array" we will be flipping
	la $a1,newbuff		#$a2 will specify the buffer that will hold the flipped array.
	la $a2,borderwidth
	jal bord


	la $a0, output		#writefile will take $a0 as file location
	la $a1,newbuff		#$a1 takes location of what we wish to write.
	jal writefile

	li $v0,10		# exit
	syscall

readfile:
#done in Q1


bord:
#a0=buffer
#a1=newbuff
#a2=borderwidth
#Can assume 24 by 7 as input
#Try to understand the math before coding!
#EXAMPLE: if borderwidth=2, 24 by 7 becomes 28 by 11.

writefile:
#slightly different from Q1.
#use as many arguments as you would like to get this to work.
#make sure the header matches the new dimensions!