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>
Older versions of NASM would not try to match unknown %if directives
with a corresponding %endif, resulting in some very odd consequences
when it comes to trying to handle support for multiple NASM versions.
Document the problem.
Reported-by: E. C. Masloch <pushbx@ulukai.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
There are currently six variations of each conditionals, and there may
be more in the future (e.g. %while). Stop trying to enumerate them all
everywhere.
Add support for index copying in the document processor.
Have pptok.pl auto-generate index metadata for conditional
preprocessor directives.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Some preprocessor functions have the same name as directives. In those
cases, they should be expanded as functions if and only if they are
followed by a left parenthesis. Although it is not inherently true that
either preprocessor functions require a paren nor that directives
cannot start with one, but it is true and will remain true for all
cases where there is a namespace collision.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Add the first "preprocessor functions". These are simply "magic"
single-line macros with a suitable expansion function. The first
application is functions equal to the %if directives, e.g.
%ifdef blah == %if %isdef(blah) except can be used anywhere (not just
in %if statements like defined() in C.)
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Simplify the code generators by merging the two hash constant arrays
into one. The hash is effectively the same, although the order of the
constants differ (possibly in a way which makes the indexing easier.)
The main difference is the amount of code is necessary to generate
each of the output C files.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Set the hash size scaling constant to 1.6, signifying 3.2 times the
hash load. This both reduces the convergence time and makes it less
likely (< 25%) that a non-entry will require a secondary comparison,
and after all, in most of our use cases non-entries are by far the
more common.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Fold the prepreprocessor and the nop preprocessor into the main
preprocessor. This means handling # cpp-like lines and TASM
compatibility tokens in the preprocessor proper, but that is really
not very hard to do.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
The name UNUSED is too generic and may conflict with future
macro definitions. This is machine-generated code anyway, so
rename UNUSED to UNUSED_HASH_ENTRY.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
If we have internal codes in pptok.c, we may have false matches for
them as tokens, plus, there is no reason for them to exist there. Go
back to putting NULL in those slots.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Simplify the handling of conditionals; remove the PPC_* types.
Automate the generation of case-sensitive versus case-insensitive
directives, and make it so the bulk of the code doesn't have to worry
about it.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Clean up some perl warnings, some of which were legitimate (apparently
undef doesn't actually take a list of arguments, a common enough
mistake that it is mentioned in the man page!, and a list of variables
after "my" can be cantankerous), and some of which were nuisance but
were easy enough to clean up.
Maybe this can resolve the problems with very old version of Perl?
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
For almost everything we should use "nctype.h". Right now we don't
have a nasm_toupper() to use <ctype.h> for things that need toupper().
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
The 2-operand form was inherently unsafe. Use the 3-operand form
instead, which guarantees that arbitrary filenames are supported.
This also means we can remove a few instances of sysopen() which was
used for exactly this reason, however, at least in theory sysopen()
isn't portable.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Make the source code easier to understand and keep track of by
organizing it into subdirectories depending on the function.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
