// Demonstrates problem with missing parenthesis in double-dereferencing
// https://gitlab.com/camelot/kickc/issues/270
  // Commodore 64 PRG executable file
.file [name="struct-ptr-22.prg", type="prg", segments="Program"]
.segmentdef Program [segments="Basic, Code, Data"]
.segmentdef Basic [start=$0801]
.segmentdef Code [start=$80d]
.segmentdef Data [startAfter="Code"]
.segment Basic
:BasicUpstart(main)
  .label print_screen = $400
  .label print_char_cursor = 4
  .label print_line_cursor = 6
.segment Code
main: {
    .label __13 = 6
    // file->bufEdit = (char*)0x4000
    lda #<$4000
    sta files
    lda #>$4000
    sta files+1
    // file->bufEdit[3] = 0xAA
    lda #$aa
    ldy #3
    ldx files
    stx.z $fe
    ldx files+1
    stx.z $ff
    sta ($fe),y
    // ((char *)file->bufEdit)[4] = 0xCC
    lda files
    sta.z __13
    lda files+1
    sta.z __13+1
    // writes address 0x0000 (wrong!)
    lda #$cc
    ldy #4
    sta (__13),y
    // print_cls()
  // writes address 0x4004 (right!)
    jsr print_cls
    // print_str("$0000=")
    lda #<print_screen
    sta.z print_char_cursor
    lda #>print_screen
    sta.z print_char_cursor+1
    lda #<str
    sta.z print_str.str
    lda #>str
    sta.z print_str.str+1
    jsr print_str
    // print_uchar(*(char *)0x0000)
    ldx.z 0
    jsr print_uchar
    // print_ln()
    lda #<print_screen
    sta.z print_line_cursor
    lda #>print_screen
    sta.z print_line_cursor+1
    jsr print_ln
    lda.z print_line_cursor
    sta.z print_char_cursor
    lda.z print_line_cursor+1
    sta.z print_char_cursor+1
    // print_str("$4004=")
    lda #<str1
    sta.z print_str.str
    lda #>str1
    sta.z print_str.str+1
    jsr print_str
    // print_uchar(*(char *)0x4004)
    ldx $4004
    jsr print_uchar
    // print_ln()
    jsr print_ln
    // }
    rts
  .segment Data
    str: .text "$0000="
    .byte 0
    str1: .text "$4004="
    .byte 0
}
.segment Code
// Clear the screen. Also resets current line/char cursor.
print_cls: {
    // memset(print_screen, ' ', 1000)
    jsr memset
    // }
    rts
}
// Print a zero-terminated string
// void print_str(__zp(2) char *str)
print_str: {
    .label str = 2
  __b1:
    // while(*str)
    ldy #0
    lda (str),y
    cmp #0
    bne __b2
    // }
    rts
  __b2:
    // print_char(*(str++))
    ldy #0
    lda (str),y
    jsr print_char
    // print_char(*(str++));
    inc.z str
    bne !+
    inc.z str+1
  !:
    jmp __b1
}
// Print a char as HEX
// void print_uchar(__register(X) char b)
print_uchar: {
    // b>>4
    txa
    lsr
    lsr
    lsr
    lsr
    // print_char(print_hextab[b>>4])
    tay
    lda print_hextab,y
  // Table of hexadecimal digits
    jsr print_char
    // b&0xf
    lda #$f
    axs #0
    // print_char(print_hextab[b&0xf])
    lda print_hextab,x
    jsr print_char
    // }
    rts
}
// Print a newline
print_ln: {
  __b1:
    // print_line_cursor + 0x28
    lda #$28
    clc
    adc.z print_line_cursor
    sta.z print_line_cursor
    bcc !+
    inc.z print_line_cursor+1
  !:
    // while (print_line_cursor<print_char_cursor)
    lda.z print_line_cursor+1
    cmp.z print_char_cursor+1
    bcc __b1
    bne !+
    lda.z print_line_cursor
    cmp.z print_char_cursor
    bcc __b1
  !:
    // }
    rts
}
// Copies the character c (an unsigned char) to the first num characters of the object pointed to by the argument str.
// void * memset(void *str, char c, unsigned int num)
memset: {
    .const c = ' '
    .const num = $3e8
    .label str = print_screen
    .label end = str+num
    .label dst = 2
    lda #<str
    sta.z dst
    lda #>str
    sta.z dst+1
  __b1:
    // for(char* dst = str; dst!=end; dst++)
    lda.z dst+1
    cmp #>end
    bne __b2
    lda.z dst
    cmp #<end
    bne __b2
    // }
    rts
  __b2:
    // *dst = c
    lda #c
    ldy #0
    sta (dst),y
    // for(char* dst = str; dst!=end; dst++)
    inc.z dst
    bne !+
    inc.z dst+1
  !:
    jmp __b1
}
// Print a single char
// void print_char(__register(A) char ch)
print_char: {
    // *(print_char_cursor++) = ch
    ldy #0
    sta (print_char_cursor),y
    // *(print_char_cursor++) = ch;
    inc.z print_char_cursor
    bne !+
    inc.z print_char_cursor+1
  !:
    // }
    rts
}
.segment Data
  print_hextab: .text "0123456789abcdef"
  files: .fill 2*$a, 0