Find Next Text Character
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# ROUTINE: FIND NEXT TEXT CHARACTER
# Finds the next character of an FFT text string. Takes jumping into account (0xF0 - 0xF3)?
# Parameters:
# r4 = Struct? (Stored in scratchpad)?
# Struct data, on breakpoint when about to display "Charging" text: (Runs once per character of the text)
# 0x00 (1 byte): (Though never loaded in this routine) is equal to the current character of the text "Charging"
# 0x14 (4 bytes) = ? (Starts equal to 0x10100404)
# 0x18 (4 bytes) = ? Starts equal to 0
# 0x1c (4 bytes) = ? Starts equal to -1
# r5 = [Character pointer] (Pointer to current character)
# Returns:
# r2 = ? (Next character pointer?)
0014ba28: 8c820018 lw r2,0x0018(r4) # [Parameter 1].0x18 (Zero when loading "Charging" text)
0014ba2c: 00000000 nop
0014ba30: 18400007 blez r2,0x0014ba50
0014ba34: 24a50001 addiu r5,r5,0x0001 # [Character pointer] = [Pointer to next character]
# if ([Parameter 1].0x18 > 0) {
0014ba38: 2442ffff addiu r2,r2,-0x0001 # [Parameter 1].0x18 - 1
0014ba3c: 14400004 bne r2,r0,0x0014ba50
0014ba40: ac820018 sw r2,0x0018(r4)
# if (([Parameter 1].0x18 - 1) == 0) {
0014ba44: 8c85001c lw r5,0x001c(r4) # [Character pointer] = [Parameter 1].0x1c
0014ba48: 2402ffff addiu r2,r0,-0x0001 # -1
0014ba4c: ac82001c sw r2,0x001c(r4) [Parameter 1].0x1c = -1
# }
# }
0014ba50: 90a60000 lbu r6,0x0000(r5) # [Current character] = (Byte loaded from [Character pointer])
0014ba54: 340200f0 ori r2,r0,0x00f0
0014ba58: 30c300f0 andi r3,r6,0x00f0
0014ba5c: 1462001f bne r3,r2,0x0014badc # if (([Current character] & 0xF0 == 0xF0) // Check for special value?
0014ba60: 00000000 nop
0014ba64: 30c2000f andi r2,r6,0x000f
0014ba68: 2c420004 sltiu r2,r2,0x0004
0014ba6c: 1040001b beq r2,r0,0x0014badc # AND ([Current character] & 0x0F < 4))
0014ba70: 00000000 nop # {
# (To get to this section, [Current character] must be between 0xF0 - 0xF3, inclusive)
0014ba74: 24a20003 addiu r2,r5,0x0003 # [Character pointer] + 3
0014ba78: ac82001c sw r2,0x001c(r4) # [Parameter 1].0x1c = [Character pointer] + 3
0014ba7c: 90a20000 lbu r2,0x0000(r5) # [Current character]
0014ba80: 00000000 nop
0014ba84: 30420003 andi r2,r2,0x0003 # [Current character] & 0x03 (Last 2 bits)
0014ba88: 000210c0 sll r2,r2,0x03 # ([Current character] & 0x03) * 8
0014ba8c: ac820014 sw r2,0x0014(r4) # [Parameter 1].0x14 = ([Current character] & 0x03) * 8
0014ba90: 90a20001 lbu r2,0x0001(r5) # [Next character]
0014ba94: 8c830014 lw r3,0x0014(r4) # [Parameter 1].0x14
0014ba98: 00021142 srl r2,r2,0x05 # [Next character] >> 5
0014ba9c: ac820018 sw r2,0x0018(r4) # [Parameter 1].0x18 = [Next character] >> 5
0014baa0: 00431021 addu r2,r2,r3 # ([Next character] >> 5) + [Parameter 1].0x14
0014baa4: 24420004 addiu r2,r2,0x0004 # ([Next character] >> 5) + [Parameter 1].0x14 + 4
0014baa8: ac820018 sw r2,0x0018(r4) # [Parameter 1].0x18 = ([Next character] >> 5) + [Parameter 1].0x14 + 4
0014baac: 90a20001 lbu r2,0x0001(r5) # [Next character]
0014bab0: 00000000 nop
0014bab4: 3042000f andi r2,r2,0x000f # [Next character] & 0x0F
0014bab8: 000219c0 sll r3,r2,0x07 # ([Next character] & 0x0F) * 128
0014babc: 00621823 subu r3,r3,r2 # ([Next character] & 0x0F) * 127
0014bac0: 00031840 sll r3,r3,0x01 # ([Next character] & 0x0F) * 254
0014bac4: ac830014 sw r3,0x0014(r4) # [Parameter 1].0x14 = ([Next character] & 0x0F) * 254
0014bac8: 90a20002 lbu r2,0x0002(r5) # [Character after next character]
0014bacc: 00000000 nop
0014bad0: 00431021 addu r2,r2,r3 # [Character after next character] + ([Next character] & 0x0F) * 254
0014bad4: 00a22823 subu r5,r5,r2 # [Character pointer] = [Character pointer] - ([Character after next character] + ([Next character] & 0x0F) * 254)
0014bad8: ac820014 sw r2,0x0014(r4) # [Parameter 1].0x14 = [Character after next character] + ([Next character] & 0x0F) * 254
# }
0014badc: 03e00008 jr r31 # return [Character pointer]
0014bae0: 00a01021 addu r2,r5,r0
