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rescinded 22 July 1999. Proofed by myself and Theo.
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Change the conditional recognition algorithm:
scan for a sequence of alphabetic characters, hash it, and compare it against
a small table (using ohash functions).
This makes Cond_Eval entry more logical, and allows for some shortcuts in
recognizing .include, .for, .undef.
This also means that conditionals must have an intervening blank between
the keyword and the actual test, e.g.,
.ifA
will no longer work.
(but no-one actually uses this, and it's highly obfuscated)
Okay miod@.
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initialize create in main.c.
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pointers is simpler than calling a function.
Recognize purely static lst headers, which don't really need any
initialization.
ok miod@
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5% speed increase on a make build.
ok miod@
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Removes remaining lint stuff from lst.lib.
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- cut up those huge include files into separate interfaces for all modules.
Put the interface documentation there, and not with the implementation.
- light-weight includes for needed concrete types (lst_t.h, timestamp_t.h).
- cut out some more logically separate parts: cmd_exec, varname, parsevar,
timestamp.
- put all error handling functions together, so that we will be able to
clean them up.
- more systematic naming: functioni to handle interval, function to handle
string.
- put the init/end code apart to minimize coupling.
- kill weird types like ReturnStatus and Boolean. Use standard bool (with a
fallback for non-iso systems)
- better interface documentation for lots of subsystems.
As a result, make compilation goes somewhat faster (5%, even considering
the largish BSD copyrights to read). The corresponding preprocessed
source goes down from 1,5M to 1M.
A few minor code changes as well: Parse_DoVar is no longer destructive.
Parse_IsVar functionality is folded into Parse_DoVar (as it knows what an
assignment is), a few more interval handling functions. Avoid calling
XXX_End when they do nothing, just #define XXX_End to nothing.
Parse_DoVar is slightly more general: it will handle compound assignments
as long as they make sense, e.g., VAR +!= cmd
will work. As a side effect, VAR++=value now triggers an error
(two + in assignment).
- this stuff doesn't occur in portable Makefiles.
- writing VAR++ = value or VAR+ +=value disambiguates it.
- this is a good thing, it uncovered a bug in bsd.port.mk.
Tested by naddy@. Okayed millert@. I'll handle the fallback if there is
any. This went through a full make build anyways, including isakmpd
(without mickey's custom binutils, as he didn't see fit to share it with me).
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Looks like nobody is using this anyways.
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Numerous changes:
- generate can build several tables
- style cleanup
- statistics code
- use variable names throughout (struct Name)
- recursive variables everywhere
- faster parser (pass buffer along instead of allocating multiple copies)
- correct parser. Handles comments everywhere, and ; correctly
- more string intervals
- simplified dir.c, less recursion.
- extended for loops
- sinclude()
- finished removing extra junk from Lst_*
- handles ${@D} and friends in a simpler way
- cleaned up and modular VarModifiers handling.
- recognizes some gnu Makefile usages and errors out about them.
Additionally, some extra functionality is defined by FEATURES. The set of
functionalities is currently hardcoded to OpenBSD defaults, but this may
include support for some NetBSD extensions, like ODE modifiers.
Backed by miod@ and millert@, who finally got sick of my endless patches...
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* Buf_Destroy can be a macro
* X_ instead of _X for struct names, to avoid infringing on the system's
namespace.
* better wildcard detection heuristics
* fix #ifdef CLEANUP code
* a few comments
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open hashing.
An interesting optimization is that the open hashing interface is more
fine-grained, hence we can compute the correct hash value at the start
of Dir_FindFile, and reuse it for each hash structure into which we look
(the effect is measurable on large directories along with objdir/VPATH).
Remove a few unnecessary Lst_Open/Lst_Close that serve no purpose except
obfuscating the code.
The interface to dir.h changes slightly, hence tedious includes changes...
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the disk or from a cache.
- use it in Dir_AddDir, and directly to set up dot.
- change Dir_AddDir to use string intervals, as this simplifies
dependend functions.
- set up an open-hashing cache for opened directory names.
- add_dirpath() function in main, to simplify code.
- simplify cleaning-up directories, as Dir_ClearPath is overkill.
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Scrap the list of all targets: it only slows make down.
The only visible difference is that the list of all targets is not
shown in order when debugging.
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- UNUSED macro that expands to __attribute__((unused)) for gcc
- move rcsid around so that they can be tagged UNUSED.
- activate -Wunused.
- use UNUSED instead of kludgy junk for function arguments.
- add extern to all extern prototypes.
- update comments in lst.h.
- clean up var.c a little bit, constifying arguments, updating comments...
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In particular, Dir_MakeFlags is abusing str_concat, and works much better
with buffers.
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There is no code change in this patch, we just move the remaining
`lowparse' functions to the right file, and adjust the interface file
accordingly.
Reviewed by miod@
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This does introduce a proper stack of IFiles to handle included files:
instead of having the current file be a special case, it's also an IFile.
The corresponding code is slightly unobfuscated, removing the error-prone
ParseEOF function, freeing the filename systematically (thus, main.c needs
to strdup stdin), and merging both include functions lookup into one.
The speed gain comes from changing the IFile structure to merge with
fgetln seamlessly.
The low-level parse code is mostly moved to a new file, lowparse.c, to
make things easier to read (see next patch as well).
Accordingly, util.c gains a fgetln.
Note the interaction between Parse_File, Dir_FindFile, and ReadMakefile in
main.c. This patch closes a subtle memory hole (only the Makefile names,
so rather small).
Reviewed by miod@.
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Apart from a few casts, VAR_GLOBAL and friends are separate
data structures, so we use a small array for local variables.
We also junk allVars, since TargFreeGN can release local nodes,
and var.c has explicit lists for its variables already.
Reviewed millert@ and miod@.
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since lookup will start with VAR_CMD in any case.
This fixes VarFind and Var_Parse to handle ctxt == NULL correctly, and
replace those confusing VAR_CMD with proper NULL pointers.
This patch also handles three small details:
- .CURDIR is necessarily set in VAR_GLOBAL,
- suffix handling for archives copies two hard-coded variables, for
which it can use a quick path,
- typos in TargFreeGN.
Reviewed millert@, miod@.
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the GNode's context directly. We rename that special Lst to `SymTable *'
in prevision of things to come.
Along the line, we lose the special GNodes affected to VAR_CMD, VAR_GLOBAL,
VAR_ENV, which become simple Lsts... This is not a problem, except when
getting to a context's name for debugging (handled very nicely by
offsetof).
Again, this is a preparatory patch, which does not gain anything except
for cleaning up issues...
Reviewed by millert@ and miod@, like the previous patch
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- audit code for Lst_Datum, it's never applied to an empty pointer,
so check can be removed -> turn into a macro,
- Lst_First, Lst_Last can become macro as well
- specialized version of Lst_Succ (Lst_Adv) to use in loops where it cannot
fail,
- Lst_Open can no longer fail. Trim down corresponding code.
Reviewed millert@, miod@
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- replaces Lst_Duplicate with Lst_Clone, which does not allocate storage
- split Lst_Concat into Lst_Concat/Lst_ConcatDestroy
Thus, all the LstValid checks are gone, since we always invoke list
functions with valid pointers.
Note that dynamic list allocation accounted for roughly 20% of all calls
to malloc. The extraneous calls to malloc left are now mostly in parse.c,
which makes some wasteful usage of temporary buffers.
With those few patches, the code is sturdier, and easier to maintain.
Reviewed by millert@
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- in Dir_Expand, path is a misnomer. Use a temp variable instead...
Reformat code for readability.
- Change Parse_MainName/Targ_FindList so that they fill arguments instead
of allocating new lists.
- nuke Targ_FindList(TG_NOCREATE), as this is never used.
- close a small memory hole (forgot to free sysMkPath if CLEANUP).
Reviewed by millert@
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Lst_Init (constructor) and Lst_New (allocation + construction)
Lst_Destroy (destructor) and Lst_Delete (deallocation + destruction),
and uses that to turn most dynamic allocation of lists (Lst pointers)
into static structures (LIST).
Most of this is mundane, except for allGNs in targ.c, where the code must
be checked to verify that Targ_Init is called soon enough.
Lst_New is a temporary addition. All lists will soon be static.
Reviewed by millert@, like the previous patch.
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In fact, it can become a macro based on Lst_ForEachFrom.
This also introduces Lst_Every, as a shortcut for the very common case where
Lst_ForEach does not need any user data.
Finally, make consistent use of a few function typedefs, instead of having
explicit void (*)(Lst) arguments all over the place.
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sense is reversed (Lst_Find returns when proc says 0, whereas Lst_ForEach
goes on while proc says 0).
This patch turns a number of Lst_ForEach into Lst_Find.
Specifically, all Lst_ForEach that actually may return quickly as proc
does not always returns zero.
Of course, the corresponding proc need to be tweaked to swap 0 and 1...
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Indicate what went wrong for commands like
@exit 1
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keep them for error reporting.
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They serve no purpose, except hiding potential bugs.
In particular, remove (ClientData) cast from macro, showing potentially
troublesome use of Hashes to store time_t.
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for reminding me.
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Lst_AtEnd, Lst_Concat, Lst_Remove, Lst_Replace.
Don't bother returning one.
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Get rid of them.
Get rid of list.h, nothing uses it anyway.
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split the function specific to for.c out, and give them more sensible
arguments at the same time.
This makes .for loop handling more efficient, as we have some heuristic
to evaluate the size of the buffer needed...
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- split For_Eval into For_Eval (first line of loop) / For_Accumulate
(remaining lines).
- encapsulate state into a For structure, instead of brain damaged static
variables that need copy.
Very minor performance hit, specifically, For structure is allocated with
malloc/free, instead of playing tricks with static/auto variables.
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This cuts down quite a lot of malloc, since in actual use,
buffer usage is mostly static.
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Actually, one of these needs to be there, because of two bugs in cond.c
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(idiotic to retrieve size every time when it's used half the time)
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- Buf_Discard is only used to remove all the bytes in a buffer,
replace with Buf_Reset,
- buffer values are not read unless accessed first through Buf_GetAll,
no need to null-terminate it at every point.
- Buf_Expand need not check if the expansion is needed. That's Buf_AddChar
and Buf_AddChars responsability (otherwise, Buf_AddChar checks twice)
- Buf_Overflow only handles overflow. Adding the character is done in
every case anyway.
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- buf.c deals exclusively with chars. Be explicit about it, and remove
extraneous dumb casts to char (can hide real type errors).
- buffer sizes are size_t. Note that bp->left can never become NULL.
- Buf_GetAll is happy with a NULL pointer for the size, remove unneeded
extra pointers.
- Propagate size_t to all places where buffer functions are used.
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Parse_String starts in the current line, but at a given line number.
.for loops yield correct line numbers, much easier to debug !
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perform the exit tests before checking for EOF.
This makes behavior while scanning tests more regular.
e.g,
.if defined(UVM) && ${UVM} == "yes"
...
.endif
without a final newline at the endif should always work,
instead of being an error half the time...
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make spends time freeing data structures right before exiting.
So don't bother.
Keep the code inside #ifdef, so that it's still there if someone
ever wants to use make code inside a library.
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We don't want to end a word on ':' or '!' if there is a better match
later on in the string. By "better" I mean one that is followed
by whitespace. This allows the user to have targets like: fie::fi:fo: fum
where "fie::fi:fo" is the target. In real life this is used
for perl5 library man pages where "::" separates an object from its
class. Ie: "File::Spec::Unix". This behaviour is also consistent
with other versions of make.
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