SPDX is an international standard for documenting software license
requirements. Remove the existing headers and replace with a brief
SPDX preamble.
See: https://spdx.dev/use/specifications/
The script used to convert the files is added to "tools", and the
file header templates in headers/ are updated.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
? in identifiers turns out to be used in the field even in non-TASM
mode. Resolve this by allowing it in an identifier still, but treat
'?' by itself the same as we would a keyword, meaning that it needs to
be separated from other identifier characters.
In other words:
a ? b : c ; conditional expression
a?b:c ; seg:off expression seg = a?b, off = c
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Create our own ctype table where we can do the tests we want to do
cheaply, instead of calling ctype functions and then adding additional
tests all over the code.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
