String case: Difference between revisions

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 =={{header|MIPS Assembly}}==
-This example modifies a string in place. <code>$a0</code> is assumed to contain a pointer to the string ''in RAM,'' writes to ROM will obviously not have the desired effect.
+These examples modify a string in place. <code>$a0</code> is assumed to contain a pointer to the string ''in RAM;'' writes to ROM will obviously not have the desired effect.
+===Convert to upper case===
 <lang mips>ToUpper:
 ;input: $a0 = pointer to beginning of string
@@ Line 1,962: / Line 1,962: @@
 	nop
-	beq $t0,ToUpper_done     ;if char is null terminator, exit
+	beq $t0,ToUpper_done             ;if char is null terminator, exit
 	nop
@@ Line 1,982: / Line 1,982: @@
 ToUpper_done:
 	jr ra
-	nop
+	nop</lang>
+===Convert to lower case===
+<lang mips>ToLower:
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-ToUpper:
 	;input: $a0 = pointer to beginning of string
 	;clobbers: $t0,$t1,$t2
@@ Line 1,996: / Line 1,995: @@
 	nop
-	beq $t0,ToUpper_done     		;not a typo, I did this to save space.
+	beq $t0,ToLower_done
 	nop
@@ Line 2,012: / Line 2,011: @@
 	addiu $a0,1
 	b ToLower_again
+	nop
+ToLower_done:
+	jr ra
 	nop</lang>