mirror of https://github.com/cc65/cc65.git
60 lines
1.7 KiB
Plaintext
60 lines
1.7 KiB
Plaintext
; Convert characters to screen codes
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; Helper macro that converts and outputs one character
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.macro _scrcode char
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.if (char >= 0) .and (char <= 31)
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.byte (char + 64)
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.elseif (char >= 32) .and (char <= 95)
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.byte (char - 32)
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.elseif (char >= 96) .and (char <= 127)
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.byte char
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.elseif (char >= 128) .and (char <= 159)
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.byte (char + 64)
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.elseif (char >= 160) .and (char <= 223)
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.byte (char - 32)
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.elseif (char >= 224) .and (char <= 255)
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.byte char
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.else
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.error "scrcode: Character constant out of range"
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.endif
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.endmacro
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.macro scrcode arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9
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; Bail out if next argument is empty
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.if .blank (arg1)
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.exitmacro
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.endif
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; Check for a string
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.if .match ({arg1}, "")
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; Walk over all string chars
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.repeat .strlen (arg1), i
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_scrcode {.strat (arg1, i)}
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.endrepeat
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; Check for a number
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.elseif .match (.left (1, {arg1}), 0)
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; Just output the number
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_scrcode arg1
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; Check for a character
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.elseif .match (.left (1, {arg1}), 'a')
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; Just output the character
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_scrcode arg1
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; Anything else is an error
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.else
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.error "scrcode: invalid argument type"
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.endif
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; Call the macro recursively with the remaining args
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scrcode arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9
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.endmacro
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