diff options
Diffstat (limited to 'programs/sub-suite/utils.s')
| -rw-r--r-- | programs/sub-suite/utils.s | 99 |
1 files changed, 80 insertions, 19 deletions
diff --git a/programs/sub-suite/utils.s b/programs/sub-suite/utils.s index 3ab948b..7e7469c 100644 --- a/programs/sub-suite/utils.s +++ b/programs/sub-suite/utils.s @@ -3,8 +3,9 @@ print_hi: and #0 ; Reset A. sta idx3 ; Clear the string index. + tax ; Reset X. lda #'$' ; Print the hex delimiter. - jsr charcpy ; + sta strbuf, x ; Save it in the string buffer. lda.q idx0 ; Get the masked address. ldx #$10 ; Set digit count to 16. jsr print_hex ; Print the address. @@ -14,23 +15,27 @@ print_hi: sta.q strbuf+9 ; Save it in the string buffer. ldx #$11 ; Add 16 to the index. stx idx3 ; - lda #':' ; Print a colon. - jsr charcpy ; - lda # ' ' ; Print a space. - jsr charcpy ; + lda.w #': ' ; Print a space. + sta.w strbuf, x ; Save it in the string buffer. + inc idx3 ; Increment the string index twice. + inc idx3 ; + and #0 ; Reset A. rts ; End of print_hi. + print_lo: - lda #0 ; Reset A. + and #0 ; Reset A. sta idx3 ; Clear the string index. @loop: ldx #2 ; Set digit count to 2. pha ; Preserve the nibble offset. jsr print_hex ; Print the low nibble offset. lda.w (ptr3) ; Get the two digits. - jsr charcpy ; Copy the first digit. - lsr #8 ; Copy the next digit. - jsr charcpy ; + ldx idx3 ; Get the string index. + sta.w strbuf, x ; Save it in the string buffer. + inc idx3 ; Increment the string index twice. + inc idx3 ; + ldx idx3 ; Get the string index. pla ; Get the nibble offset back. inc ; Increment the offset. cmp #$10 ; Are we at the last offset? @@ -38,11 +43,11 @@ print_lo: @loop1: pha ; No, so preserve the nibble offset. lda #' ' ; Add a space to the string buffer. - jsr charcpy ; + sta strbuf, x ; Save it in the string buffer. + inc idx3 ; Increment the string index. pla ; Get the nibble offset back. bra @loop ; Keep looping. @end: - inx ; Increment the index by one. lda #0 ; Null terminate the string buffer. sta strbuf, x ; tax ; Reset X. @@ -50,6 +55,7 @@ print_lo: jsr print_str ; rts ; End of print_lo. + print_chunk: ldx #0 ; Reset X. phy.w ; Preserve the screen buffer index. @@ -60,14 +66,17 @@ print_chunk: lda (idx0), y ; Get the byte at that address. jsr print_hex ; Print the byte. lda.w (ptr3) ; Get the two digits. - jsr charcpy ; Copy the first digit. - lsr #8 ; Copy the next digit. - jsr charcpy ; + ldx idx3 ; Get the string index. + sta.w strbuf, x ; Save it in the string buffer. + inc idx3 ; Increment the string index twice. + inc idx3 ; + ldx idx3 ; Get the string index. iny ; Increment the byte index. cpy #$10 ; Have we read 16 bytes? beq @end ; Yes, so we're done. lda #' ' ; No, so add a soace to the string buffer. - jsr charcpy ; + sta strbuf, x ; Save it in the string buffer. + inc idx3 ; Increment the string index. bra @loop ; Keep looping. @end: ply.w ; Get the screen buffer index back. @@ -202,7 +211,6 @@ isdelm2: isdelm: ldx #0 ; Reset X. - stx rega ; Reset the shift value. @loop: ldb dtab, x ; Get the compare value. beq @other ; We hit the end of the table, so check for the others. @@ -222,13 +230,47 @@ isdelm: lda #0 ; Return 0. rts ; End of isdelm. @rshft: - stx rega ; Save the shift value. - ldx #0 ; Reset X. lda #1 ; Set up the bitshift. - lsl rega ; Return 1 << X. + phx ; Push the shift value to stack. + lsl sp+1 ; Return 1 << X. + plx ; Pull the shift value off the stack. + ldx #0 ; Reset X. rts ; End of isdelm. +isesc: + ldy.w idx0 ; Get the string index. + lda (ptr), y ; Get the current character. + cmp #'\\' ; Is it a backslash? + bne @false ; No, so return false. +@dec: + dey ; Decrement the string index. + lda (ptr), y ; Get the current character. + iny ; Set the string index back. + cmp #'\\' ; Is it a backslash? + beq @false ; Yes, so return false. + lda #1 ; No, so return true. + rts ; End of isesc. +@false: + and #0 ; Return false. + rts ; End of isesc. + + +is_altok: + sec ; Do a non borrowing subtract. + sbc #12 ; Subtract 12 from the token. + and #$FF ; Make sure the value is 8 bits. + cmp #4 ; Is the token in between PTOK_B, and PTOK_P? + bcc @r1 ; Yes, so return 1. + beq @r1 ; +@r0: + lda #0 ; Return 0. + rts ; End of is_altok. +@r1: + lda #1 ; Return 1. + rts ; End of is_altok. + + get_ptok: ldx #0 ; Reset X. jsr tolower ; Conver the character to lowercase. @@ -257,3 +299,22 @@ get_ptok: @ralph: lda #PTOK_ALPH ; Return PTOK_ALPH. rts ; End of get_ptok. + + +get_ctrlidx: + cmp #$7F ; Is this a delete character? + beq @del ; Yes, so return the same value as backspace. + sec ; Do a non borrowing subtract. + sbc #8 ; Subtract 8 from the character, to get the index. + tax ; Copy the index to X. + and #0 ; Reset A. + cpx #19 ; Are we less than, or equal to the max size of the table? + bcc @get_rtval ; Yes, so get the return value from the table. + beq @get_rtval ; + rts ; End of get_ctrlidx. +@get_rtval: + lda ct_rtb, x ; Get the return value from the table. + rts ; End of get_ctrlidx. +@del: + lda #2 ; Return 2. + rts ; End of get_ctrlidx. |