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Write in MIPS, a program from an input file (asking the user for filename, and then reading the file and counting how many upper case letters, lower case letters, number symbols, other symbols, lines of text, and signed numbers?

Testing.txt is a file to upload in it, it have the following

It have to be able to read files that are large,

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and the garden diminishes: cucumber leaves rumpled

and rusty, zucchini felled by borers, tomatoes sparse

on the vines. But out in the perennial beds, theres one last

blast of color: ignitions of goldenrod, flamboyant

asters, spiraling mums, all those flashy spikes waving

in the wind, conducting summers final notes.

The ornamental grasses have gone to seed, haloed

in the last light. Nights grow chilly, but the days

are still warm; I wear the sun like a shawl on my neck

and arms. Hundreds of blackbirds ribbon in, settle

in the trees, so many black leaves, then, just as suddenly,

theyre gone. This is autumns great Departure Gate,

and everyone, boarding passes in hand, waits

patiently in a long, long line.

-251,+212,+80,129

-102,-173,207,+11,-115

-231,-125,-251,-99,+145

+57,198,-140,15,-45

+123,-185,-104,-236,-247

98,+174,-217,-218,+178

+113,-212,-135,-10

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Now the following MIPS code is what I have been working on. I have been having trouble implementing asking the user for filename, and having it read. Also having trouble separating upper case letters, and lower case letters, lines of text, and signed numbers (+ - * /) separated from symbols?

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.data

fin: .asciiz "testing.txt" # filename for input

buffer: .space 1024

line: .space 126

counts: .word 0:4 #an array of 4 counter values, 0th for letters , 1st for digits, 2nd for space and 3rd for special

spaceInfo: .asciiz " The number of spaces in the string is: "

letterInfo: .asciiz " The number of letters in the string is: "

digitInfo: .asciiz " The number of digits in the string is: "

specialInfo: .asciiz " The number of special chars in the string is: "

.text

#open a file for writing

li $v0, 13 # system call for open file

la $a0, fin # board file name

li $a1, 0 # Open for reading

li $a2, 0

syscall # open a file (file descriptor returned in $v0)

move $s6, $v0 # save the file descriptor

main:

#prompt the user

la $a0, prompt

li $v0, 4

syscall

#get user input

la $a0, line

li $a1, 126

li $v0, 8

syscall

la $t1, line

li $t3, 0 #counter for no. of chars

process:

lb $t0, ($t1)

add $t1, $t1, 1 #next location

beq $t0, '\0' end_process

beq $t0, ' ', end_process

add $t3, $t3, 1 #increment counter for total no. of chars

bge $t0, 'a', lower

bge $t0, 'A', upper

bge $t0, '0', digits

beq $t0, ' ', spacy

b process

lower:

bgt $t0, 'z', process

lw $t2, counts+0

addi $t2, $t2, 1

sw $t2, counts+0

b process

upper:

bgt $t0, 'Z', process

lw $t2, counts+0

addi $t2, $t2, 1

sw $t2, counts+0

b process

digits:

bgt $t0, '9', process

lw $t2, counts+4

addi $t2, $t2, 1

sw $t2, counts+4

b process

spacy:

lw $t2, counts+8

addi $t2, $t2, 1

sw $t2, counts+8

b process

end_process:

#calculate number of special chars as totalchars - (no. of letters + no. of digits + no. of spaces)

#first calculate (no. of letters + no. of digits + no. of spaces)

li $t4, 0

lw $t5, counts+0

add $t4, $t4, $t5

lw $t5, counts+4

add $t4, $t4, $t5

lw $t5, counts+8

add $t4, $t4, $t5

#now calculate no. of special chars

sub $t3, $t3, $t4

sw $t3, counts+12 #store as the 4th array element

#display the results

#display no. of letters

li $v0, 4

la $a0, letterInfo

syscall

li $v0, 1

lw $a0, counts+0

syscall

#display no. of digits

li $v0, 4

la $a0, digitInfo

syscall

li $v0, 1

lw $a0, counts+4

syscall

#display no. of spaces

li $v0, 4

la $a0, spaceInfo

syscall

li $v0, 1

lw $a0, counts+8

syscall

#display no. of special

li $v0, 4

la $a0, specialInfo

syscall

li $v0, 1

lw $a0, counts+12

syscall

#exit

li $v0, 10

syscall

#read from file

li $v0, 14 # system call for read from file

move $a0, $s6 # file descriptor

la $a1, buffer # address of buffer to which to read

li $a2, 1024 # hardcoded buffer length

syscall # read from file

# Close the file

li $v0, 16 # system call for close file

move $a0, $s6 # file descriptor to close

syscall # close file

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