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freebsd/usr.bin/make/suff.c
Hartmut Brandt 19446efc06 Get rid of the third argument to Var_Value() the pointer it pointed 
to has always been set to NULL for some time now.

Obtained from:	DragonFlyBSD
2005-05-24 15:58:35 +00:00

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/*-
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)suff.c 8.4 (Berkeley) 3/21/94
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*-
* suff.c --
* Functions to maintain suffix lists and find implicit dependents
* using suffix transformation rules
*
* Interface:
* Suff_Init Initialize all things to do with suffixes.
*
* Suff_DoPaths This function is used to make life easier
* when searching for a file according to its
* suffix. It takes the global search path,
* as defined using the .PATH: target, and appends
* its directories to the path of each of the
* defined suffixes, as specified using
* .PATH<suffix>: targets. In addition, all
* directories given for suffixes labeled as
* include files or libraries, using the .INCLUDES
* or .LIBS targets, are played with using
* Dir_MakeFlags to create the .INCLUDES and
* .LIBS global variables.
*
* Suff_ClearSuffixes Clear out all the suffixes and defined
* transformations.
*
* Suff_IsTransform Return TRUE if the passed string is the lhs
* of a transformation rule.
*
* Suff_AddSuffix Add the passed string as another known suffix.
*
* Suff_GetPath Return the search path for the given suffix.
*
* Suff_AddInclude Mark the given suffix as denoting an include
* file.
*
* Suff_AddLib Mark the given suffix as denoting a library.
*
* Suff_AddTransform Add another transformation to the suffix
* graph. Returns GNode suitable for framing, I
* mean, tacking commands, attributes, etc. on.
*
* Suff_SetNull Define the suffix to consider the suffix of
* any file that doesn't have a known one.
*
* Suff_FindDeps Find implicit sources for and the location of
* a target based on its suffix. Returns the
* bottom-most node added to the graph or NULL
* if the target had no implicit sources.
*/
#include <sys/queue.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#include "arch.h"
#include "buf.h"
#include "config.h"
#include "dir.h"
#include "globals.h"
#include "GNode.h"
#include "lst.h"
#include "make.h"
#include "parse.h"
#include "str.h"
#include "suff.h"
#include "targ.h"
#include "util.h"
#include "var.h"
/* Lst of suffixes */
static Lst sufflist = Lst_Initializer(sufflist);
/* Lst of suffixes to be cleaned */
static Lst suffClean = Lst_Initializer(suffClean);
/* Lst of sources */
static Lst srclist = Lst_Initializer(srclist);
/* Lst of transformation rules */
static Lst transforms = Lst_Initializer(transforms);
/* Counter for assigning suffix numbers */
static int sNum = 0;
/*
* Structure describing an individual suffix.
*/
typedef struct Suff {
char *name; /* The suffix itself */
int nameLen; /* Length of the suffix */
short flags; /* Type of suffix */
#define SUFF_INCLUDE 0x01 /* One which is #include'd */
#define SUFF_LIBRARY 0x02 /* One which contains a library */
#define SUFF_NULL 0x04 /* The empty suffix */
struct Path searchPath; /* Path for files with this suffix */
int sNum; /* The suffix number */
int refCount; /* Reference count of list membership */
Lst parents; /* Suffixes we have a transformation to */
Lst children; /* Suffixes we have a transformation from */
Lst ref; /* List of lists this suffix is referenced */
} Suff;
/*
* Structure used in the search for implied sources.
*/
typedef struct Src {
char *file; /* The file to look for */
char *pref; /* Prefix from which file was formed */
Suff *suff; /* The suffix on the file */
struct Src *parent; /* The Src for which this is a source */
GNode *node; /* The node describing the file */
int children; /* Count of existing children (so we don't free
* this thing too early or never nuke it) */
#ifdef DEBUG_SRC
Lst cp; /* Debug; children list */
#endif
} Src;
/* The NULL suffix for this run */
static Suff *suffNull;
/* The empty suffix required for POSIX single-suffix transformation rules */
static Suff *emptySuff;
static void SuffFindDeps(GNode *, Lst *);
/*-
*-----------------------------------------------------------------------
* SuffSuffIsSuffix --
* See if suff is a suffix of str.
*
* Results:
* NULL if it ain't, pointer to character in str before suffix if
* it is.
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static char *
SuffSuffIsSuffix(const Suff *s, char *str)
{
const char *p1; /* Pointer into suffix name */
char *p2; /* Pointer into string being examined */
size_t len;
len = strlen(str);
p1 = s->name + s->nameLen;
p2 = str + len;
while (p1 >= s->name && len > 0 && *p1 == *p2) {
p1--;
p2--;
len--;
}
return (p1 == s->name - 1 ? p2 : NULL);
}
/*-
*-----------------------------------------------------------------------
* SuffSuffFind --
* Find a suffix given its name.
*
* Results:
* The suffix or NULL.
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static Suff *
SuffSuffFind(const char *s)
{
LstNode *ln;
LST_FOREACH(ln, &sufflist) {
if (strcmp(s, ((const Suff *)Lst_Datum(ln))->name) == 0)
return (Lst_Datum(ln));
}
return (NULL);
}
/*-
*-----------------------------------------------------------------------
* SuffTransFind
* Find a transform.
*
* Results:
* transform or NULL.
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static GNode *
SuffTransFind(const char *name)
{
LstNode *ln;
LST_FOREACH(ln, &transforms) {
if (strcmp(name, ((const GNode *)Lst_Datum(ln))->name) == 0)
return (Lst_Datum(ln));
}
return (NULL);
}
/*********** Maintenance Functions ************/
#if 0
/*
* Keep this function for now until it is clear why a .SUFFIXES: doesn't
* actually delete the suffixes but just puts them on the suffClean list.
*/
/*-
*-----------------------------------------------------------------------
* SuffFree --
* Free up all memory associated with the given suffix structure.
*
* Results:
* none
*
* Side Effects:
* the suffix entry is detroyed
*-----------------------------------------------------------------------
*/
static void
SuffFree(void *sp)
{
Suff *s = sp;
if (s == suffNull)
suffNull = NULL;
if (s == emptySuff)
emptySuff = NULL;
Lst_Destroy(&s->ref, NOFREE);
Lst_Destroy(&s->children, NOFREE);
Lst_Destroy(&s->parents, NOFREE);
Lst_Destroy(&s->searchPath, Dir_Destroy);
free(s->name);
free(s);
}
#endif
/*-
*-----------------------------------------------------------------------
* SuffRemove --
* Remove the suffix into the list
*
* Results:
* None
*
* Side Effects:
* The reference count for the suffix is decremented
*-----------------------------------------------------------------------
*/
static void
SuffRemove(Lst *l, Suff *s)
{
LstNode *ln = Lst_Member(l, s);
if (ln != NULL) {
Lst_Remove(l, ln);
s->refCount--;
}
}
/*-
*-----------------------------------------------------------------------
* SuffInsert --
* Insert the suffix into the list keeping the list ordered by suffix
* numbers.
*
* Results:
* None
*
* Side Effects:
* The reference count of the suffix is incremented
*-----------------------------------------------------------------------
*/
static void
SuffInsert(Lst *l, Suff *s)
{
LstNode *ln; /* current element in l we're examining */
Suff *s2; /* the suffix descriptor in this element */
s2 = NULL;
for (ln = Lst_First(l); ln != NULL; ln = Lst_Succ(ln)) {
s2 = Lst_Datum(ln);
if (s2->sNum >= s->sNum)
break;
}
if (s2 == NULL) {
DEBUGF(SUFF, ("inserting an empty list?..."));
}
DEBUGF(SUFF, ("inserting %s(%d)...", s->name, s->sNum));
if (ln == NULL) {
DEBUGF(SUFF, ("at end of list\n"));
Lst_AtEnd(l, s);
s->refCount++;
Lst_AtEnd(&s->ref, l);
} else if (s2->sNum != s->sNum) {
DEBUGF(SUFF, ("before %s(%d)\n", s2->name, s2->sNum));
Lst_Insert(l, ln, s);
s->refCount++;
Lst_AtEnd(&s->ref, l);
} else {
DEBUGF(SUFF, ("already there\n"));
}
}
/*-
*-----------------------------------------------------------------------
* Suff_ClearSuffixes --
* This is gross. Nuke the list of suffixes but keep all transformation
* rules around. The transformation graph is destroyed in this process,
* but we leave the list of rules so when a new graph is formed the rules
* will remain.
* This function is called from the parse module when a
* .SUFFIXES:\n line is encountered.
*
* Results:
* none
*
* Side Effects:
* the sufflist and its graph nodes are destroyed
*-----------------------------------------------------------------------
*/
void
Suff_ClearSuffixes(void)
{
Lst_Concat(&suffClean, &sufflist, LST_CONCLINK);
sNum = 1;
suffNull = emptySuff;
/*
* Clear suffNull's children list (the other suffixes are built new, but
* suffNull is used as is).
* NOFREE is used because all suffixes are are on the suffClean list.
* suffNull should not have parents.
*/
Lst_Destroy(&suffNull->children, NOFREE);
}
/*-
*-----------------------------------------------------------------------
* SuffParseTransform --
* Parse a transformation string to find its two component suffixes.
*
* Results:
* TRUE if the string is a valid transformation and FALSE otherwise.
*
* Side Effects:
* The passed pointers are overwritten.
*
*-----------------------------------------------------------------------
*/
static Boolean
SuffParseTransform(char *str, Suff **srcPtr, Suff **targPtr)
{
LstNode *srcLn; /* element in suffix list of trans source*/
Suff *src; /* Source of transformation */
char *str2; /* Extra pointer (maybe target suffix) */
LstNode *singleLn; /* element in suffix list of any suffix
* that exactly matches str */
Suff *single = NULL; /* Source of possible transformation to
* null suffix */
singleLn = NULL;
/*
* Loop looking first for a suffix that matches the start of the
* string and then for one that exactly matches the rest of it. If
* we can find two that meet these criteria, we've successfully
* parsed the string.
*/
srcLn = Lst_First(&sufflist);
for (;;) {
/* advance to next possible suffix */
while (srcLn != NULL) {
src = Lst_Datum(srcLn);
if (strncmp(str, src->name, strlen(src->name)) == 0)
break;
srcLn = LST_NEXT(srcLn);
}
if (srcLn == NULL) {
/*
* Ran out of source suffixes -- no such rule
*/
if (singleLn != NULL) {
/*
* Not so fast Mr. Smith! There was a suffix
* that encompassed the entire string, so we
* assume it was a transformation to the null
* suffix (thank you POSIX). We still prefer to
* find a double rule over a singleton, hence we
* leave this check until the end.
*
* XXX: Use emptySuff over suffNull?
*/
*srcPtr = single;
*targPtr = suffNull;
return (TRUE);
}
return (FALSE);
}
str2 = str + src->nameLen;
if (*str2 == '\0') {
single = src;
singleLn = srcLn;
} else {
*targPtr = SuffSuffFind(str2);
if (*targPtr != NULL) {
*srcPtr = src;
return (TRUE);
}
}
/* next one */
srcLn = LST_NEXT(srcLn);
}
}
/*-
*-----------------------------------------------------------------------
* Suff_IsTransform --
* Return TRUE if the given string is a transformation rule
*
*
* Results:
* TRUE if the string is a concatenation of two known suffixes.
* FALSE otherwise
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
Boolean
Suff_IsTransform(char *str)
{
Suff *src, *targ;
return (SuffParseTransform(str, &src, &targ));
}
/*-
*-----------------------------------------------------------------------
* Suff_AddTransform --
* Add the transformation rule described by the line to the
* list of rules and place the transformation itself in the graph
*
* Results:
* The node created for the transformation in the transforms list
*
* Side Effects:
* The node is placed on the end of the transforms Lst and links are
* made between the two suffixes mentioned in the target name
*-----------------------------------------------------------------------
*/
GNode *
Suff_AddTransform(char *line)
{
GNode *gn; /* GNode of transformation rule */
Suff *s; /* source suffix */
Suff *t; /* target suffix */
gn = SuffTransFind(line);
if (gn == NULL) {
/*
* Make a new graph node for the transformation.
* It will be filled in by the Parse module.
*/
gn = Targ_NewGN(line);
Lst_AtEnd(&transforms, gn);
} else {
/*
* New specification for transformation rule. Just nuke the
* old list of commands so they can be filled in again...
* We don't actually free the commands themselves, because a
* given command can be attached to several different
* transformations.
*/
Lst_Destroy(&gn->commands, NOFREE);
Lst_Destroy(&gn->children, NOFREE);
}
gn->type = OP_TRANSFORM;
SuffParseTransform(line, &s, &t);
/*
* link the two together in the proper relationship and order
*/
DEBUGF(SUFF, ("defining transformation from `%s' to `%s'\n",
s->name, t->name));
SuffInsert(&t->children, s);
SuffInsert(&s->parents, t);
return (gn);
}
/*-
*-----------------------------------------------------------------------
* Suff_EndTransform --
* Handle the finish of a transformation definition, removing the
* transformation from the graph if it has neither commands nor
* sources. This is called from the Parse module at the end of
* a dependency block.
*
* Side Effects:
* If the node has no commands or children, the children and parents
* lists of the affected suffices are altered.
*
*-----------------------------------------------------------------------
*/
void
Suff_EndTransform(const GNode *gn)
{
Suff *s, *t;
if (!Lst_IsEmpty(&gn->commands) || !Lst_IsEmpty(&gn->children)) {
DEBUGF(SUFF, ("transformation %s complete\n", gn->name));
return;
}
/*
* SuffParseTransform() may fail for special rules which are not
* actual transformation rules (e.g., .DEFAULT).
*/
if (!SuffParseTransform(gn->name, &s, &t))
return;
DEBUGF(SUFF, ("deleting transformation from `%s' to `%s'\n",
s->name, t->name));
/*
* Remove the source from the target's children list. We check
* for a NULL return to handle a beanhead saying something like
* .c.o .c.o:
*
* We'll be called twice when the next target is seen, but .c
* and .o are only linked once...
*/
SuffRemove(&t->children, s);
/*
* Remove the target from the source's parents list
*/
SuffRemove(&s->parents, t);
}
/*-
*-----------------------------------------------------------------------
* SuffRebuildGraph --
* Called from Suff_AddSuffix via LST_FOREACH to search through the
* list of existing transformation rules and rebuild the transformation
* graph when it has been destroyed by Suff_ClearSuffixes. If the
* given rule is a transformation involving this suffix and another,
* existing suffix, the proper relationship is established between
* the two.
*
* Side Effects:
* The appropriate links will be made between this suffix and
* others if transformation rules exist for it.
*
*-----------------------------------------------------------------------
*/
static void
SuffRebuildGraph(const GNode *transform, Suff *s)
{
char *cp;
Suff *s2 = NULL;
/*
* First see if it is a transformation from this suffix.
*/
if (strncmp(transform->name, s->name, strlen(s->name)) == 0) {
cp = transform->name + strlen(s->name);
if (cp[0] == '\0') /* null rule */
s2 = suffNull;
else
s2 = SuffSuffFind(cp);
if (s2 != NULL) {
/*
* Found target. Link in and return, since it can't be
* anything else.
*/
SuffInsert(&s2->children, s);
SuffInsert(&s->parents, s2);
return;
}
}
/*
* Not from, maybe to?
*/
cp = SuffSuffIsSuffix(s, transform->name);
if (cp != NULL) {
/*
* Null-terminate the source suffix in order to find it.
*/
cp[1] = '\0';
s2 = SuffSuffFind(transform->name);
/*
* Replace the start of the target suffix
*/
cp[1] = s->name[0];
if (s2 != NULL) {
/*
* Found it -- establish the proper relationship
*/
SuffInsert(&s->children, s2);
SuffInsert(&s2->parents, s);
}
}
}
/*-
*-----------------------------------------------------------------------
* Suff_AddSuffix --
* Add the suffix in string to the end of the list of known suffixes.
* Should we restructure the suffix graph? Make doesn't...
*
* Results:
* None
*
* Side Effects:
* A GNode is created for the suffix and a Suff structure is created and
* added to the suffixes list unless the suffix was already known.
*-----------------------------------------------------------------------
*/
void
Suff_AddSuffix(char *str)
{
Suff *s; /* new suffix descriptor */
LstNode *ln;
if (SuffSuffFind(str) != NULL)
/*
* Already known
*/
return;
s = emalloc(sizeof(Suff));
s->name = estrdup(str);
s->nameLen = strlen(s->name);
TAILQ_INIT(&s->searchPath);
Lst_Init(&s->children);
Lst_Init(&s->parents);
Lst_Init(&s->ref);
s->sNum = sNum++;
s->flags = 0;
s->refCount = 0;
Lst_AtEnd(&sufflist, s);
/*
* Look for any existing transformations from or to this suffix.
* XXX: Only do this after a Suff_ClearSuffixes?
*/
LST_FOREACH(ln, &transforms)
SuffRebuildGraph(Lst_Datum(ln), s);
}
/*-
*-----------------------------------------------------------------------
* Suff_GetPath --
* Return the search path for the given suffix, if it's defined.
*
* Results:
* The searchPath for the desired suffix or NULL if the suffix isn't
* defined.
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
struct Path *
Suff_GetPath(char *sname)
{
Suff *s;
s = SuffSuffFind(sname);
if (s == NULL)
return (NULL);
return (&s->searchPath);
}
/*-
*-----------------------------------------------------------------------
* Suff_DoPaths --
* Extend the search paths for all suffixes to include the default
* search path.
*
* Results:
* None.
*
* Side Effects:
* The searchPath field of all the suffixes is extended by the
* directories in dirSearchPath. If paths were specified for the
* ".h" suffix, the directories are stuffed into a global variable
* called ".INCLUDES" with each directory preceded by a -I. The same
* is done for the ".a" suffix, except the variable is called
* ".LIBS" and the flag is -L.
*-----------------------------------------------------------------------
*/
void
Suff_DoPaths(void)
{
Suff *s;
LstNode *ln;
char *ptr;
struct Path inIncludes; /* Cumulative .INCLUDES path */
struct Path inLibs; /* Cumulative .LIBS path */
TAILQ_INIT(&inIncludes);
TAILQ_INIT(&inLibs);
for (ln = Lst_First(&sufflist); ln != NULL; ln = Lst_Succ(ln)) {
s = Lst_Datum(ln);
#ifdef INCLUDES
if (s->flags & SUFF_INCLUDE) {
Path_Concat(&inIncludes, &s->searchPath);
}
#endif /* INCLUDES */
#ifdef LIBRARIES
if (s->flags & SUFF_LIBRARY) {
Path_Concat(&inLibs, &s->searchPath);
}
#endif /* LIBRARIES */
Path_Concat(&s->searchPath, &dirSearchPath);
}
ptr = Path_MakeFlags("-I", &inIncludes);
Var_Set(".INCLUDES", ptr, VAR_GLOBAL);
free(ptr);
ptr = Path_MakeFlags("-L", &inLibs);
Var_Set(".LIBS", ptr, VAR_GLOBAL);
free(ptr);
Path_Clear(&inIncludes);
Path_Clear(&inLibs);
}
/*-
*-----------------------------------------------------------------------
* Suff_AddInclude --
* Add the given suffix as a type of file which gets included.
* Called from the parse module when a .INCLUDES line is parsed.
* The suffix must have already been defined.
*
* Results:
* None.
*
* Side Effects:
* The SUFF_INCLUDE bit is set in the suffix's flags field
*
*-----------------------------------------------------------------------
*/
void
Suff_AddInclude(char *sname)
{
Suff *s;
if ((s = SuffSuffFind(sname)) != NULL)
s->flags |= SUFF_INCLUDE;
}
/*-
*-----------------------------------------------------------------------
* Suff_AddLib --
* Add the given suffix as a type of file which is a library.
* Called from the parse module when parsing a .LIBS line. The
* suffix must have been defined via .SUFFIXES before this is
* called.
*
* Results:
* None.
*
* Side Effects:
* The SUFF_LIBRARY bit is set in the suffix's flags field
*
*-----------------------------------------------------------------------
*/
void
Suff_AddLib(char *sname)
{
Suff *s;
if ((s = SuffSuffFind(sname)) != NULL)
s->flags |= SUFF_LIBRARY;
}
/*
* Create a new Src structure
*/
static Src *
SuffSrcCreate(char *file, char *prefix, Suff *suff, Src *parent, GNode *node)
{
Src *s;
s = emalloc(sizeof(*s));
s->file = file;
s->pref = prefix;
s->suff = suff;
s->parent = parent;
s->node = node;
s->children = 0;
#ifdef DEBUG_SRC
Lst_Init(&s->cp);
#endif
return (s);
}
/********** Implicit Source Search Functions *********/
/*-
*-----------------------------------------------------------------------
* SuffAddLevel --
* Add all the children of targ as Src structures to the given list:
* Add a suffix as a Src structure to the given list with its parent
* being the given Src structure. If the suffix is the null suffix,
* the prefix is used unaltered as the file name in the Src structure.
*
* Results:
* None
*
* Side Effects:
* Lots of structures are created and added to the list
*-----------------------------------------------------------------------
*/
static void
SuffAddLevel(Lst *l, Src *targ)
{
LstNode *ln;
Suff *suff;
Src *s2;
#ifdef DEBUG_SRC
const LstNode *ln1;
#endif
LST_FOREACH(ln, &targ->suff->children) {
suff = Lst_Datum(ln);
if ((suff->flags & SUFF_NULL) && *suff->name != '\0') {
/*
* If the suffix has been marked as the NULL suffix,
* also create a Src structure for a file with no suffix
* attached. Two birds, and all that...
*/
s2 = SuffSrcCreate(estrdup(targ->pref), targ->pref,
suff, targ, NULL);
suff->refCount++;
targ->children += 1;
Lst_AtEnd(l, s2);
#ifdef DEBUG_SRC
Lst_AtEnd(&targ->cp, s2);
printf("1 add %p %p to %p:", targ, s2, l);
LST_FOREACH(ln1, l)
printf("%p ", (const void *)Lst_Datum(ln1));
printf("\n");
#endif
}
s2 = SuffSrcCreate(str_concat(targ->pref, suff->name, 0),
targ->pref, suff, targ, NULL);
suff->refCount++;
targ->children += 1;
Lst_AtEnd(l, s2);
#ifdef DEBUG_SRC
Lst_AtEnd(&targ->cp, s2);
printf("2 add %p %p to %p:", targ, s2, l);
LST_FOREACH(ln1, l)
printf("%p ", (const void *)Lst_Datum(ln1));
printf("\n");
#endif
}
}
/*-
*----------------------------------------------------------------------
* SuffRemoveSrc --
* Free all src structures in list that don't have a reference count
* XXX this actually frees only the first of these.
*
* Results:
* True if a src was removed
*
* Side Effects:
* The memory is free'd.
*----------------------------------------------------------------------
*/
static int
SuffRemoveSrc(Lst *l)
{
LstNode *ln, *ln1;
Src *s;
int t = 0;
#ifdef DEBUG_SRC
printf("cleaning %lx: ", (unsigned long) l);
LST_FOREACH(ln, l)
printf("%p ", (const void *)Lst_Datum(ln));
printf("\n");
#endif
for (ln = Lst_First(l); ln != NULL; ln = ln1) {
ln1 = Lst_Succ(ln);
s = (Src *)Lst_Datum(ln);
if (s->children == 0) {
free(s->file);
if (!s->parent)
free(s->pref);
else {
#ifdef DEBUG_SRC
LstNode *ln = Lst_Member(&s->parent->cp, s);
if (ln != NULL)
Lst_Remove(&s->parent->cp, ln);
#endif
--s->parent->children;
}
#ifdef DEBUG_SRC
printf("free: [l=%p] p=%p %d\n", l, s, s->children);
Lst_Destroy(&s->cp, NOFREE);
#endif
Lst_Remove(l, ln);
free(s);
t |= 1;
return (TRUE);
}
#ifdef DEBUG_SRC
else {
const LstNode *tln;
printf("keep: [l=%p] p=%p %d: ", l, s, s->children);
LST_FOREACH(tln, &s->cp)
printf("%p ", (const void *)Lst_Datum(tln));
printf("\n");
}
#endif
}
return (t);
}
/*-
*-----------------------------------------------------------------------
* SuffFindThem --
* Find the first existing file/target in the list srcs
*
* Results:
* The lowest structure in the chain of transformations
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static Src *
SuffFindThem(Lst *srcs, Lst *slst)
{
Src *s; /* current Src */
Src *rs; /* returned Src */
char *ptr;
rs = NULL;
while (!Lst_IsEmpty (srcs)) {
s = Lst_DeQueue(srcs);
DEBUGF(SUFF, ("\ttrying %s...", s->file));
/*
* A file is considered to exist if either a node exists in the
* graph for it or the file actually exists.
*/
if (Targ_FindNode(s->file, TARG_NOCREATE) != NULL) {
#ifdef DEBUG_SRC
printf("remove %p from %p\n", s, srcs);
#endif
rs = s;
break;
}
if ((ptr = Path_FindFile(s->file,
&s->suff->searchPath)) != NULL) {
rs = s;
#ifdef DEBUG_SRC
printf("remove %p from %p\n", s, srcs);
#endif
free(ptr);
break;
}
DEBUGF(SUFF, ("not there\n"));
SuffAddLevel(srcs, s);
Lst_AtEnd(slst, s);
}
if (rs) {
DEBUGF(SUFF, ("got it\n"));
}
return (rs);
}
/*-
*-----------------------------------------------------------------------
* SuffFindCmds --
* See if any of the children of the target in the Src structure is
* one from which the target can be transformed. If there is one,
* a Src structure is put together for it and returned.
*
* Results:
* The Src structure of the "winning" child, or NULL if no such beast.
*
* Side Effects:
* A Src structure may be allocated.
*
*-----------------------------------------------------------------------
*/
static Src *
SuffFindCmds(Src *targ, Lst *slst)
{
LstNode *ln; /* General-purpose list node */
GNode *t; /* Target GNode */
GNode *s; /* Source GNode */
int prefLen;/* The length of the defined prefix */
Suff *suff; /* Suffix on matching beastie */
Src *ret; /* Return value */
char *cp;
t = targ->node;
prefLen = strlen(targ->pref);
for (ln = Lst_First(&t->children); ln != NULL; ln = Lst_Succ(ln)) {
s = Lst_Datum(ln);
cp = strrchr(s->name, '/');
if (cp == NULL) {
cp = s->name;
} else {
cp++;
}
if (strncmp(cp, targ->pref, prefLen) == 0) {
/*
* The node matches the prefix ok, see if it has
* a known suffix.
*/
suff = SuffSuffFind(&cp[prefLen]);
if (suff != NULL) {
/*
* It even has a known suffix, see if there's
* a transformation defined between the node's
* suffix and the target's suffix.
*
* XXX: Handle multi-stage transformations
* here, too.
*/
if (Lst_Member(&suff->parents,
targ->suff) != NULL) {
/*
* Hot Damn! Create a new Src structure
* to describe this transformation
* (making sure to duplicate the
* source node's name so Suff_FindDeps
* can free it again (ick)), and return
* the new structure.
*/
ret = SuffSrcCreate(estrdup(s->name),
targ->pref, suff, targ, s);
suff->refCount++;
targ->children += 1;
#ifdef DEBUG_SRC
printf("3 add %p %p\n", &targ, ret);
Lst_AtEnd(&targ->cp, ret);
#endif
Lst_AtEnd(slst, ret);
DEBUGF(SUFF, ("\tusing existing source "
"%s\n", s->name));
return (ret);
}
}
}
}
return (NULL);
}
/*-
* The child node contains variable references. Expand them and return
* a list of expansions.
*/
static void
SuffExpandVariables(GNode *parent, GNode *child, Lst *members)
{
Buffer *buf;
char *cp;
char *start;
Lst_Init(members);
DEBUGF(SUFF, ("Expanding \"%s\"...", child->name));
buf = Var_Subst(child->name, parent, TRUE);
cp = Buf_Data(buf);
if (child->type & OP_ARCHV) {
/*
* Node was an archive(member) target, so we
* want to call on the Arch module to find the
* nodes for us, expanding variables in the
* parent's context.
*/
Arch_ParseArchive(&cp, members, parent);
Buf_Destroy(buf, TRUE);
return;
}
/*
* Break the result into a vector of strings whose nodes we can find,
* then add those nodes to the members list. Unfortunately, we can't use
* brk_string b/c it doesn't understand about variable specifications
* with spaces in them... XXX
*/
for (start = cp; *start == ' ' || *start == '\t'; start++)
;
for (cp = start; *cp != '\0'; cp++) {
if (*cp == ' ' || *cp == '\t') {
/*
* White-space -- terminate element, find the node,
* add it, skip any further spaces.
*/
*cp++ = '\0';
Lst_AtEnd(members, Targ_FindNode(start, TARG_CREATE));
while (*cp == ' ' || *cp == '\t') {
cp++;
}
/*
* Adjust cp for increment at
* start of loop, but set start
* to first non-space.
*/
start = cp--;
} else if (*cp == '$') {
/*
* Start of a variable spec -- contact variable module
* to find the end so we can skip over it.
*/
char *junk;
size_t len = 0;
Boolean doFree;
junk = Var_Parse(cp, parent, TRUE, &len, &doFree);
if (junk != var_Error) {
cp += len - 1;
}
if (doFree) {
free(junk);
}
} else if (*cp == '\\' && *cp != '\0') {
/*
* Escaped something -- skip over it
*/
cp++;
}
}
if (cp != start) {
/*
* Stuff left over -- add it to the
* list too
*/
Lst_AtEnd(members, Targ_FindNode(start, TARG_CREATE));
}
Buf_Destroy(buf, TRUE);
}
/*-
* The child node contains wildcards. Expand them and return a list of
* expansions.
*/
static void
SuffExpandWildcards(GNode *child, Lst *members)
{
char *cp;
Lst exp; /* List of expansions */
LstNode *ln;
struct Path *path; /* Search path along which to expand */
Lst_Init(members);
/*
* Find a path along which to expand the word.
*
* If the word has a known suffix, use that path.
* If it has no known suffix and we're allowed to use the null
* suffix, use its path.
* Else use the default system search path.
*/
LST_FOREACH(ln, &sufflist) {
if (SuffSuffIsSuffix(Lst_Datum(ln), child->name) != NULL)
break;
}
DEBUGF(SUFF, ("Wildcard expanding \"%s\"...", child->name));
if (ln != NULL) {
Suff *s = Lst_Datum(ln);
DEBUGF(SUFF, ("suffix is \"%s\"...", s->name));
path = &s->searchPath;
} else {
/*
* Use default search path
*/
path = &dirSearchPath;
}
/*
* Expand the word along the chosen path
*/
Lst_Init(&exp);
Path_Expand(child->name, path, &exp);
while (!Lst_IsEmpty(&exp)) {
/*
* Fetch next expansion off the list and find its GNode
*/
cp = Lst_DeQueue(&exp);
DEBUGF(SUFF, ("%s...", cp));
Lst_AtEnd(members, Targ_FindNode(cp, TARG_CREATE));
}
}
/*-
*-----------------------------------------------------------------------
* SuffExpandChildren --
* Expand the names of any children of a given node that contain
* variable invocations or file wildcards into actual targets.
*
* Results:
* == 0 (continue)
*
* Side Effects:
* The expanded node is removed from the parent's list of children,
* and the parent's unmade counter is decremented, but other nodes
* may be added.
*
*-----------------------------------------------------------------------
*/
static void
SuffExpandChildren(GNode *parent, LstNode *current)
{
GNode *cchild; /* current child */
GNode *gn;
LstNode *prev; /* node after which to append new source */
Lst members; /* expanded nodes */
if (current == NULL) {
/* start from begin of parent's children list */
current = Lst_First(&parent->children);
}
while (current != NULL) {
cchild = Lst_Datum(current);
/*
* First do variable expansion -- this takes precedence over
* wildcard expansion. If the result contains wildcards, they'll
* be gotten to later since the resulting words are tacked
* instead of the current child onto the children list.
*
* XXXHB what if cchild contains lib.a(t1.o t2.o t3.o) but
* no $?
*/
if (strchr(cchild->name, '$') != NULL) {
SuffExpandVariables(parent, cchild, &members);
} else if (Dir_HasWildcards(cchild->name)) {
SuffExpandWildcards(cchild, &members);
} else {
/* nothing special just advance to next child */
current = LST_NEXT(current);
continue;
}
/*
* New nodes effectively take the place of the child,
* so place them after the child
*/
prev = current;
/*
* Add all new elements to the parent node if they aren't
* already children of it.
*/
while(!Lst_IsEmpty(&members)) {
gn = Lst_DeQueue(&members);
DEBUGF(SUFF, ("%s...", gn->name));
if (Lst_Member(&parent->children, gn) == NULL) {
Lst_Append(&parent->children, prev, gn);
prev = Lst_Succ(prev);
Lst_AtEnd(&gn->parents, parent);
parent->unmade++;
}
}
/*
* Now the source is expanded, remove it from the list
* of children to keep it from being processed.
* Advance to the next child.
*/
prev = current;
current = LST_NEXT(current);
parent->unmade--;
Lst_Remove(&parent->children, prev);
DEBUGF(SUFF, ("\n"));
}
}
/*-
*-----------------------------------------------------------------------
* SuffApplyTransform --
* Apply a transformation rule, given the source and target nodes
* and suffixes.
*
* Results:
* TRUE if successful, FALSE if not.
*
* Side Effects:
* The source and target are linked and the commands from the
* transformation are added to the target node's commands list.
* All attributes but OP_DEPMASK and OP_TRANSFORM are applied
* to the target. The target also inherits all the sources for
* the transformation rule.
*
*-----------------------------------------------------------------------
*/
static Boolean
SuffApplyTransform(GNode *tGn, GNode *sGn, Suff *t, Suff *s)
{
LstNode *ln; /* General node */
char *tname; /* Name of transformation rule */
GNode *gn; /* Node for same */
if (Lst_Member(&tGn->children, sGn) == NULL) {
/*
* Not already linked, so form the proper links between the
* target and source.
*/
Lst_AtEnd(&tGn->children, sGn);
Lst_AtEnd(&sGn->parents, tGn);
tGn->unmade += 1;
}
if ((sGn->type & OP_OPMASK) == OP_DOUBLEDEP) {
/*
* When a :: node is used as the implied source of a node,
* we have to link all its cohorts in as sources as well. Only
* the initial sGn gets the target in its iParents list, however
* as that will be sufficient to get the .IMPSRC variable set
* for tGn
*/
for (ln = Lst_First(&sGn->cohorts); ln != NULL;
ln = Lst_Succ(ln)) {
gn = Lst_Datum(ln);
if (Lst_Member(&tGn->children, gn) == NULL) {
/*
* Not already linked, so form the proper
* links between the target and source.
*/
Lst_AtEnd(&tGn->children, gn);
Lst_AtEnd(&gn->parents, tGn);
tGn->unmade += 1;
}
}
}
/*
* Locate the transformation rule itself
*/
tname = str_concat(s->name, t->name, 0);
gn = SuffTransFind(tname);
free(tname);
if (gn == NULL) {
/*
* Not really such a transformation rule (can happen when we're
* called to link an OP_MEMBER and OP_ARCHV node), so return
* FALSE.
*/
return (FALSE);
}
DEBUGF(SUFF, ("\tapplying %s -> %s to \"%s\"\n",
s->name, t->name, tGn->name));
/*
* Record last child for expansion purposes
*/
ln = Lst_Last(&tGn->children);
/*
* Pass the buck to Make_HandleUse to apply the rule
*/
Make_HandleUse(gn, tGn);
/*
* Deal with wildcards and variables in any acquired sources
*/
ln = Lst_Succ(ln);
if (ln != NULL) {
SuffExpandChildren(tGn, ln);
}
/*
* Keep track of another parent to which this beast is transformed so
* the .IMPSRC variable can be set correctly for the parent.
*/
Lst_AtEnd(&sGn->iParents, tGn);
return (TRUE);
}
/*-
*-----------------------------------------------------------------------
* SuffFindArchiveDeps --
* Locate dependencies for an OP_ARCHV node.
*
* Results:
* None
*
* Side Effects:
* Same as Suff_FindDeps
*
*-----------------------------------------------------------------------
*/
static void
SuffFindArchiveDeps(GNode *gn, Lst *slst)
{
char *eoarch; /* End of archive portion */
char *eoname; /* End of member portion */
char *name; /* Start of member's name */
GNode *mem; /* Node for member */
Suff *ms; /* Suffix descriptor for member */
static const char *copy[] = {
TARGET, /* Must be first */
PREFIX, /* Must be second */
};
/*
* The node is an archive(member) pair. so we must find a
* suffix for both of them.
*/
eoarch = strchr(gn->name, '(');
eoname = strchr(eoarch, ')');
*eoname = '\0'; /* Nuke parentheses during suffix search */
*eoarch = '\0'; /* So a suffix can be found */
name = eoarch + 1;
/*
* To simplify things, call Suff_FindDeps recursively on the member now,
* so we can simply compare the member's .PREFIX and .TARGET variables
* to locate its suffix. This allows us to figure out the suffix to
* use for the archive without having to do a quadratic search over the
* suffix list, backtracking for each one...
*/
mem = Targ_FindNode(name, TARG_CREATE);
SuffFindDeps(mem, slst);
/*
* Create the link between the two nodes right off
*/
if (Lst_Member(&gn->children, mem) == NULL) {
Lst_AtEnd(&gn->children, mem);
Lst_AtEnd(&mem->parents, gn);
gn->unmade += 1;
}
/*
* Copy in the variables from the member node to this one.
*/
Var_Set(copy[1], Var_Value(copy[1], mem), gn);
Var_Set(copy[0], Var_Value(copy[0], mem), gn);
ms = mem->suffix;
if (ms == NULL) {
/*
* Didn't know what it was -- use .NULL suffix if not in
* make mode
*/
DEBUGF(SUFF, ("using null suffix\n"));
ms = suffNull;
}
/*
* Set the other two local variables required for this target.
*/
Var_Set(MEMBER, name, gn);
Var_Set(ARCHIVE, gn->name, gn);
if (ms != NULL) {
/*
* Member has a known suffix, so look for a transformation rule
* from it to a possible suffix of the archive. Rather than
* searching through the entire list, we just look at suffixes
* to which the member's suffix may be transformed...
*/
LstNode *ln;
/*
* Use first matching suffix...
*/
LST_FOREACH(ln, &ms->parents) {
if (SuffSuffIsSuffix(Lst_Datum(ln), gn->name) != NULL)
break;
}
if (ln != NULL) {
/*
* Got one -- apply it
*/
if (!SuffApplyTransform(gn, mem, Lst_Datum(ln), ms)) {
DEBUGF(SUFF, ("\tNo transformation from "
"%s -> %s\n", ms->name,
((Suff *)Lst_Datum(ln))->name));
}
}
}
/*
* Replace the opening and closing parens now we've no need
* of the separate pieces.
*/
*eoarch = '(';
*eoname = ')';
/*
* Pretend gn appeared to the left of a dependency operator so
* the user needn't provide a transformation from the member to the
* archive.
*/
if (OP_NOP(gn->type)) {
gn->type |= OP_DEPENDS;
}
/*
* Flag the member as such so we remember to look in the archive for
* its modification time.
*/
mem->type |= OP_MEMBER;
}
/*-
*-----------------------------------------------------------------------
* SuffFindNormalDeps --
* Locate implicit dependencies for regular targets.
*
* Results:
* None.
*
* Side Effects:
* Same as Suff_FindDeps...
*
*-----------------------------------------------------------------------
*/
static void
SuffFindNormalDeps(GNode *gn, Lst *slst)
{
char *eoname; /* End of name */
char *sopref; /* Start of prefix */
LstNode *ln; /* Next suffix node to check */
Lst srcs; /* List of sources at which to look */
Lst targs; /* List of targets to which things can be
* transformed. They all have the same file,
* but different suff and pref fields */
Src *bottom; /* Start of found transformation path */
Src *src; /* General Src pointer */
char *pref; /* Prefix to use */
Src *targ; /* General Src target pointer */
eoname = gn->name + strlen(gn->name);
sopref = gn->name;
/*
* Begin at the beginning...
*/
ln = Lst_First(&sufflist);
Lst_Init(&srcs);
Lst_Init(&targs);
/*
* We're caught in a catch-22 here. On the one hand, we want to use any
* transformation implied by the target's sources, but we can't examine
* the sources until we've expanded any variables/wildcards they may
* hold, and we can't do that until we've set up the target's local
* variables and we can't do that until we know what the proper suffix
* for the target is (in case there are two suffixes one of which is a
* suffix of the other) and we can't know that until we've found its
* implied source, which we may not want to use if there's an existing
* source that implies a different transformation.
*
* In an attempt to get around this, which may not work all the time,
* but should work most of the time, we look for implied sources first,
* checking transformations to all possible suffixes of the target,
* use what we find to set the target's local variables, expand the
* children, then look for any overriding transformations they imply.
* Should we find one, we discard the one we found before.
*/
while (ln != NULL) {
/*
* Look for next possible suffix...
*/
while (ln != NULL) {
if (SuffSuffIsSuffix(Lst_Datum(ln), gn->name) != NULL)
break;
ln = LST_NEXT(ln);
}
if (ln != NULL) {
int prefLen; /* Length of the prefix */
Src *target;
/*
* Allocate a Src structure to which things can be
* transformed
*/
target = SuffSrcCreate(estrdup(gn->name), NULL,
Lst_Datum(ln), NULL, gn);
target->suff->refCount++;
/*
* Allocate room for the prefix, whose end is found
* by subtracting the length of the suffix from
* the end of the name.
*/
prefLen = (eoname - target->suff->nameLen) - sopref;
assert(prefLen >= 0);
target->pref = emalloc(prefLen + 1);
memcpy(target->pref, sopref, prefLen);
target->pref[prefLen] = '\0';
/*
* Add nodes from which the target can be made
*/
SuffAddLevel(&srcs, target);
/*
* Record the target so we can nuke it
*/
Lst_AtEnd(&targs, target);
/*
* Search from this suffix's successor...
*/
ln = Lst_Succ(ln);
}
}
/*
* Handle target of unknown suffix...
*/
if (Lst_IsEmpty(&targs) && suffNull != NULL) {
DEBUGF(SUFF, ("\tNo known suffix on %s. Using .NULL suffix\n",
gn->name));
targ = SuffSrcCreate(estrdup(gn->name), estrdup(sopref),
suffNull, NULL, gn);
targ->suff->refCount++;
/*
* Only use the default suffix rules if we don't have commands
* or dependencies defined for this gnode
*/
if (Lst_IsEmpty(&gn->commands) && Lst_IsEmpty(&gn->children))
SuffAddLevel(&srcs, targ);
else {
DEBUGF(SUFF, ("not "));
}
DEBUGF(SUFF, ("adding suffix rules\n"));
Lst_AtEnd(&targs, targ);
}
/*
* Using the list of possible sources built up from the target
* suffix(es), try and find an existing file/target that matches.
*/
bottom = SuffFindThem(&srcs, slst);
if (bottom == NULL) {
/*
* No known transformations -- use the first suffix found for
* setting the local variables.
*/
if (!Lst_IsEmpty(&targs)) {
targ = Lst_Datum(Lst_First(&targs));
} else {
targ = NULL;
}
} else {
/*
* Work up the transformation path to find the suffix of the
* target to which the transformation was made.
*/
for (targ = bottom; targ->parent != NULL; targ = targ->parent)
continue;
}
/*
* The .TARGET variable we always set to be the name at this point,
* since it's only set to the path if the thing is only a source and
* if it's only a source, it doesn't matter what we put here as far
* as expanding sources is concerned, since it has none...
*/
Var_Set(TARGET, gn->name, gn);
pref = (targ != NULL) ? targ->pref : gn->name;
Var_Set(PREFIX, pref, gn);
/*
* Now we've got the important local variables set, expand any sources
* that still contain variables or wildcards in their names.
*/
SuffExpandChildren(gn, NULL);
if (targ == NULL) {
DEBUGF(SUFF, ("\tNo valid suffix on %s\n", gn->name));
sfnd_abort:
/*
* Deal with finding the thing on the default search path if the
* node is only a source (not on the lhs of a dependency
* operator or [XXX] it has neither children or commands).
*/
if (OP_NOP(gn->type) || (Lst_IsEmpty(&gn->children) &&
Lst_IsEmpty(&gn->commands))) {
gn->path = Path_FindFile(gn->name,
(targ == NULL ? &dirSearchPath :
&targ->suff->searchPath));
if (gn->path != NULL) {
char *ptr;
Var_Set(TARGET, gn->path, gn);
if (targ != NULL) {
/*
* Suffix known for the thing -- trim
* the suffix off the path to form the
* proper .PREFIX variable.
*/
int savep = strlen(gn->path) -
targ->suff->nameLen;
char savec;
if (gn->suffix)
gn->suffix->refCount--;
gn->suffix = targ->suff;
gn->suffix->refCount++;
savec = gn->path[savep];
gn->path[savep] = '\0';
if ((ptr = strrchr(gn->path, '/')) != NULL)
ptr++;
else
ptr = gn->path;
Var_Set(PREFIX, ptr, gn);
gn->path[savep] = savec;
} else {
/*
* The .PREFIX gets the full path if
* the target has no known suffix.
*/
if (gn->suffix)
gn->suffix->refCount--;
gn->suffix = NULL;
if ((ptr = strrchr(gn->path, '/')) != NULL)
ptr++;
else
ptr = gn->path;
Var_Set(PREFIX, ptr, gn);
}
}
} else {
/*
* Not appropriate to search for the thing -- set the
* path to be the name so Dir_MTime won't go
* grovelling for it.
*/
if (gn->suffix)
gn->suffix->refCount--;
gn->suffix = (targ == NULL) ? NULL : targ->suff;
if (gn->suffix)
gn->suffix->refCount++;
free(gn->path);
gn->path = estrdup(gn->name);
}
goto sfnd_return;
}
/*
* If the suffix indicates that the target is a library, mark that in
* the node's type field.
*/
if (targ->suff->flags & SUFF_LIBRARY) {
gn->type |= OP_LIB;
}
/*
* Check for overriding transformation rule implied by sources
*/
if (!Lst_IsEmpty(&gn->children)) {
src = SuffFindCmds(targ, slst);
if (src != NULL) {
/*
* Free up all the Src structures in the
* transformation path up to, but not including,
* the parent node.
*/
while (bottom && bottom->parent != NULL) {
if (Lst_Member(slst, bottom) == NULL) {
Lst_AtEnd(slst, bottom);
}
bottom = bottom->parent;
}
bottom = src;
}
}
if (bottom == NULL) {
/*
* No idea from where it can come -- return now.
*/
goto sfnd_abort;
}
/*
* We now have a list of Src structures headed by 'bottom' and linked
* via their 'parent' pointers. What we do next is create links between
* source and target nodes (which may or may not have been created)
* and set the necessary local variables in each target. The
* commands for each target are set from the commands of the
* transformation rule used to get from the src suffix to the targ
* suffix. Note that this causes the commands list of the original
* node, gn, to be replaced by the commands of the final
* transformation rule. Also, the unmade field of gn is incremented.
* Etc.
*/
if (bottom->node == NULL) {
bottom->node = Targ_FindNode(bottom->file, TARG_CREATE);
}
for (src = bottom; src->parent != NULL; src = src->parent) {
targ = src->parent;
if (src->node->suffix)
src->node->suffix->refCount--;
src->node->suffix = src->suff;
src->node->suffix->refCount++;
if (targ->node == NULL) {
targ->node = Targ_FindNode(targ->file, TARG_CREATE);
}
SuffApplyTransform(targ->node, src->node,
targ->suff, src->suff);
if (targ->node != gn) {
/*
* Finish off the dependency-search process for any
* nodes between bottom and gn (no point in questing
* around the filesystem for their implicit source
* when it's already known). Note that the node can't
* have any sources that need expanding, since
* SuffFindThem will stop on an existing
* node, so all we need to do is set the standard and
* System V variables.
*/
targ->node->type |= OP_DEPS_FOUND;
Var_Set(PREFIX, targ->pref, targ->node);
Var_Set(TARGET, targ->node->name, targ->node);
}
}
if (gn->suffix)
gn->suffix->refCount--;
gn->suffix = src->suff;
gn->suffix->refCount++;
/*
* So Dir_MTime doesn't go questing for it...
*/
free(gn->path);
gn->path = estrdup(gn->name);
/*
* Nuke the transformation path and the Src structures left over in the
* two lists.
*/
sfnd_return:
if (bottom)
if (Lst_Member(slst, bottom) == NULL)
Lst_AtEnd(slst, bottom);
while (SuffRemoveSrc(&srcs) || SuffRemoveSrc(&targs))
continue;
Lst_Concat(slst, &srcs, LST_CONCLINK);
Lst_Concat(slst, &targs, LST_CONCLINK);
}
/*-
*-----------------------------------------------------------------------
* Suff_FindDeps --
* Find implicit sources for the target described by the graph node
* gn
*
* Results:
* Nothing.
*
* Side Effects:
* Nodes are added to the graph below the passed-in node. The nodes
* are marked to have their IMPSRC variable filled in. The
* PREFIX variable is set for the given node and all its
* implied children.
*
* Notes:
* The path found by this target is the shortest path in the
* transformation graph, which may pass through non-existent targets,
* to an existing target. The search continues on all paths from the
* root suffix until a file is found. I.e. if there's a path
* .o -> .c -> .l -> .l,v from the root and the .l,v file exists but
* the .c and .l files don't, the search will branch out in
* all directions from .o and again from all the nodes on the
* next level until the .l,v node is encountered.
*
*-----------------------------------------------------------------------
*/
void
Suff_FindDeps(GNode *gn)
{
SuffFindDeps(gn, &srclist);
while (SuffRemoveSrc(&srclist))
continue;
}
static void
SuffFindDeps(GNode *gn, Lst *slst)
{
if (gn->type & OP_DEPS_FOUND) {
/*
* If dependencies already found, no need to do it again...
*/
return;
} else {
gn->type |= OP_DEPS_FOUND;
}
DEBUGF(SUFF, ("SuffFindDeps (%s)\n", gn->name));
if (gn->type & OP_ARCHV) {
SuffFindArchiveDeps(gn, slst);
} else if (gn->type & OP_LIB) {
/*
* If the node is a library, it is the arch module's job to find
* it and set the TARGET variable accordingly. We merely provide
* the search path, assuming all libraries end in ".a" (if the
* suffix hasn't been defined, there's nothing we can do for it,
* so we just set the TARGET variable to the node's name in order
* to give it a value).
*/
Suff *s;
s = SuffSuffFind(LIBSUFF);
if (gn->suffix)
gn->suffix->refCount--;
if (s != NULL) {
gn->suffix = s;
gn->suffix->refCount++;
Arch_FindLib(gn, &s->searchPath);
} else {
gn->suffix = NULL;
Var_Set(TARGET, gn->name, gn);
}
/*
* Because a library (-lfoo) target doesn't follow the standard
* filesystem conventions, we don't set the regular variables for
* the thing. .PREFIX is simply made empty...
*/
Var_Set(PREFIX, "", gn);
} else {
SuffFindNormalDeps(gn, slst);
}
}
/*-
*-----------------------------------------------------------------------
* Suff_SetNull --
* Define which suffix is the null suffix.
*
* Results:
* None.
*
* Side Effects:
* 'suffNull' is altered.
*
* Notes:
* Need to handle the changing of the null suffix gracefully so the
* old transformation rules don't just go away.
*
*-----------------------------------------------------------------------
*/
void
Suff_SetNull(char *name)
{
Suff *s;
if ((s = SuffSuffFind(name)) == NULL) {
Parse_Error(PARSE_WARNING, "Desired null suffix %s "
"not defined.", name);
return;
}
if (suffNull != NULL) {
suffNull->flags &= ~SUFF_NULL;
}
s->flags |= SUFF_NULL;
/*
* XXX: Here's where the transformation mangling
* would take place
*/
suffNull = s;
}
/*-
*-----------------------------------------------------------------------
* Suff_Init --
* Initialize suffixes module
*
* Results:
* None
*
* Side Effects:
* Many
*-----------------------------------------------------------------------
*/
void
Suff_Init(void)
{
sNum = 0;
/*
* Create null suffix for single-suffix rules (POSIX). The thing doesn't
* actually go on the suffix list or everyone will think that's its
* suffix.
*/
emptySuff = suffNull = emalloc(sizeof(Suff));
suffNull->name = estrdup("");
suffNull->nameLen = 0;
TAILQ_INIT(&suffNull->searchPath);
Path_Concat(&suffNull->searchPath, &dirSearchPath);
Lst_Init(&suffNull->children);
Lst_Init(&suffNull->parents);
Lst_Init(&suffNull->ref);
suffNull->sNum = sNum++;
suffNull->flags = SUFF_NULL;
suffNull->refCount = 1;
}
/********************* DEBUGGING FUNCTIONS **********************/
void
Suff_PrintAll(void)
{
const LstNode *ln;
const LstNode *tln;
const GNode *gn;
const Suff *s;
static const struct flag2str suff_flags[] = {
{ SUFF_INCLUDE, "INCLUDE" },
{ SUFF_LIBRARY, "LIBRARY" },
{ SUFF_NULL, "NULL" },
{ 0, NULL }
};
printf("#*** Suffixes:\n");
LST_FOREACH(ln, &sufflist) {
s = Lst_Datum(ln);
printf("# `%s' [%d] ", s->name, s->refCount);
if (s->flags != 0) {
printf(" ");
print_flags(stdout, suff_flags, s->flags, 1);
}
printf("\n#\tTo: ");
LST_FOREACH(tln, &s->parents)
printf("`%s' ", ((const Suff *)Lst_Datum(tln))->name);
printf("\n#\tFrom: ");
LST_FOREACH(tln, &s->children)
printf("`%s' ", ((const Suff *)Lst_Datum(tln))->name);
printf("\n#\tSearch Path: ");
Path_Print(&s->searchPath);
printf("\n");
}
printf("#*** Transformations:\n");
LST_FOREACH(ln, &transforms) {
gn = Lst_Datum(ln);
printf("%-16s: ", gn->name);
Targ_PrintType(gn->type);
printf("\n");
LST_FOREACH(tln, &gn->commands)
printf("\t%s\n", (const char *)Lst_Datum(tln));
printf("\n");
}
}
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