/*- * 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 __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: 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 #include #include "arch.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); static int sNum = 0; /* Counter for assigning suffix numbers */ /* * 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 */ Lst searchPath; /* The path along which files of this suffix * may be found */ 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; /* * A structure for passing more than one argument to the Lst-library-invoked * function... */ typedef struct { Lst *l; Src *s; } LstSrc; static Suff *suffNull; /* The NULL suffix for this run */ static Suff *emptySuff; /* The empty suffix required for POSIX * single-suffix transformation rules */ static void SuffInsert(Lst *, Suff *); static void SuffRemove(Lst *, Suff *); static Boolean SuffParseTransform(char *, Suff **, Suff **); static int SuffRebuildGraph(void *, void *); static int SuffAddSrc(void *, void *); static int SuffRemoveSrc(Lst *); static void SuffAddLevel(Lst *, Src *); static Src *SuffFindThem(Lst *, Lst *); static Src *SuffFindCmds(Src *, Lst *); static int SuffExpandChildren(void *, void *); static Boolean SuffApplyTransform(GNode *, GNode *, Suff *, Suff *); static void SuffFindDeps(GNode *, Lst *); static void SuffFindArchiveDeps(GNode *, Lst *); static void SuffFindNormalDeps(GNode *, Lst *); static int SuffPrintName(void *, void *); static int SuffPrintSuff(void *, void *); static int SuffPrintTrans(void *, void *); #ifdef DEBUG_SRC static int PrintAddr(void *, void *); #endif /* DEBUG_SRC */ /*************** Lst Predicates ****************/ /*- *----------------------------------------------------------------------- * SuffStrIsPrefix -- * See if pref is a prefix of str. * * Results: * NULL if it ain't, pointer to character in str after prefix if so * * Side Effects: * None *----------------------------------------------------------------------- */ static char * SuffStrIsPrefix(const char *pref, char *str) { while (*str && *pref == *str) { pref++; str++; } return (*pref ? NULL : str); } /*- *----------------------------------------------------------------------- * SuffSuffIsSuffix -- * See if suff is a suffix of str. Str should point to THE END of the * string to check. (THE END == the null byte) * * 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 */ p1 = s->name + s->nameLen; p2 = str; while (p1 >= s->name && *p1 == *p2) { p1--; p2--; } return (p1 == s->name - 1 ? p2 : NULL); } /*- *----------------------------------------------------------------------- * SuffSuffIsSuffixP -- * Predicate form of SuffSuffIsSuffix. Passed as the callback function * to Lst_Find. * * Results: * 0 if the suffix is the one desired, non-zero if not. * * Side Effects: * None. * * XXX use the function above once constification is complete. *----------------------------------------------------------------------- */ static int SuffSuffIsSuffixP(const void *is, const void *str) { const Suff *s = is; const char *p1; /* Pointer into suffix name */ const char *p2 = str; /* Pointer into string being examined */ p1 = s->name + s->nameLen; while (p1 >= s->name && *p1 == *p2) { p1--; p2--; } return (p1 != s->name - 1); } /*- *----------------------------------------------------------------------- * SuffSuffHasNameP -- * Callback procedure for finding a suffix based on its name. Used by * Suff_GetPath. * * Results: * 0 if the suffix is of the given name. non-zero otherwise. * * Side Effects: * None *----------------------------------------------------------------------- */ static int SuffSuffHasNameP(const void *s, const void *sname) { return (strcmp(sname, ((const Suff *)s)->name)); } /*- *----------------------------------------------------------------------- * SuffSuffIsPrefix -- * See if the suffix described by s is a prefix of the string. Care * must be taken when using this to search for transformations and * what-not, since there could well be two suffixes, one of which * is a prefix of the other... * * Results: * 0 if s is a prefix of str. non-zero otherwise * * Side Effects: * None * * XXX use the function above once constification is complete. *----------------------------------------------------------------------- */ static int SuffSuffIsPrefix(const void *s, const void *istr) { const char *pref = ((const Suff *)s)->name; const char *str = istr; while (*str != '\0' && *pref == *str) { pref++; str++; } return (*pref != '\0'); } /*- *----------------------------------------------------------------------- * SuffGNHasNameP -- * See if the graph node has the desired name * * Results: * 0 if it does. non-zero if it doesn't * * Side Effects: * None *----------------------------------------------------------------------- */ static int SuffGNHasNameP(const void *gn, const void *name) { return (strcmp(name, ((const GNode *)gn)->name)); } /*********** 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 */ LstNode *targLn; /* element in suffix list of trans target*/ 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 */ srcLn = NULL; 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. */ for (;;) { if (srcLn == NULL) { srcLn = Lst_Find(&sufflist, str, SuffSuffIsPrefix); } else { srcLn = Lst_FindFrom(&sufflist, Lst_Succ(srcLn), str, SuffSuffIsPrefix); } 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); } src = Lst_Datum(srcLn); str2 = str + src->nameLen; if (*str2 == '\0') { single = src; singleLn = srcLn; } else { targLn = Lst_Find(&sufflist, str2, SuffSuffHasNameP); if (targLn != NULL) { *srcPtr = src; *targPtr = Lst_Datum(targLn); return (TRUE); } } } } /*- *----------------------------------------------------------------------- * 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 */ *t; /* target suffix */ LstNode *ln; /* Node for existing transformation */ ln = Lst_Find(&transforms, line, SuffGNHasNameP); if (ln == 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. */ gn = Lst_Datum(ln); 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 a callback procedure for the Parse module via * Lst_ForEach * * Results: * === 0 * * Side Effects: * If the node has no commands or children, the children and parents * lists of the affected suffices are altered. * *----------------------------------------------------------------------- */ int Suff_EndTransform(void *gnp, void *dummy __unused) { GNode *gn = (GNode *)gnp; if ((gn->type & OP_TRANSFORM) && Lst_IsEmpty(&gn->commands) && Lst_IsEmpty(&gn->children)) { Suff *s, *t; /* * SuffParseTransform() may fail for special rules which are not * actual transformation rules (e.g., .DEFAULT). */ if (!SuffParseTransform(gn->name, &s, &t)) return (0); 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); } else if (gn->type & OP_TRANSFORM) { DEBUGF(SUFF, ("transformation %s complete\n", gn->name)); } return (0); } /*- *----------------------------------------------------------------------- * 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. * * Results: * Always 0. * * Side Effects: * The appropriate links will be made between this suffix and * others if transformation rules exist for it. * *----------------------------------------------------------------------- */ static int SuffRebuildGraph(void *transformp, void *sp) { GNode *transform = transformp; Suff *s = sp; char *cp; LstNode *ln; Suff *s2 = NULL; /* * First see if it is a transformation from this suffix. */ cp = SuffStrIsPrefix(s->name, transform->name); if (cp != (char *)NULL) { if (cp[0] == '\0') /* null rule */ s2 = suffNull; else { ln = Lst_Find(&sufflist, cp, SuffSuffHasNameP); if (ln != NULL) s2 = Lst_Datum(ln); } 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 (0); } } /* * Not from, maybe to? */ cp = SuffSuffIsSuffix(s, transform->name + strlen(transform->name)); if (cp != NULL) { /* * Null-terminate the source suffix in order to find it. */ cp[1] = '\0'; ln = Lst_Find(&sufflist, transform->name, SuffSuffHasNameP); /* * Replace the start of the target suffix */ cp[1] = s->name[0]; if (ln != NULL) { /* * Found it -- establish the proper relationship */ s2 = Lst_Datum(ln); SuffInsert(&s->children, s2); SuffInsert(&s2->parents, s); } } return (0); } /*- *----------------------------------------------------------------------- * 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; ln = Lst_Find(&sufflist, str, SuffSuffHasNameP); if (ln == NULL) { s = emalloc(sizeof(Suff)); s->name = estrdup(str); s->nameLen = strlen(s->name); Lst_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(&transforms, SuffRebuildGraph, 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 *----------------------------------------------------------------------- */ Lst * Suff_GetPath(char *sname) { LstNode *ln; Suff *s; ln = Lst_Find(&sufflist, sname, SuffSuffHasNameP); if (ln == NULL) { return (NULL); } else { s = Lst_Datum(ln); 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; Lst inIncludes; /* Cumulative .INCLUDES path */ Lst inLibs; /* Cumulative .LIBS path */ Lst_Init(&inIncludes); Lst_Init(&inLibs); for (ln = Lst_First(&sufflist); ln != NULL; ln = Lst_Succ(ln)) { s = Lst_Datum(ln); if (!Lst_IsEmpty(&s->searchPath)) { #ifdef INCLUDES if (s->flags & SUFF_INCLUDE) { Dir_Concat(&inIncludes, &s->searchPath); } #endif /* INCLUDES */ #ifdef LIBRARIES if (s->flags & SUFF_LIBRARY) { Dir_Concat(&inLibs, &s->searchPath); } #endif /* LIBRARIES */ Dir_Concat(&s->searchPath, &dirSearchPath); } else { Lst_Destroy(&s->searchPath, Dir_Destroy); Lst_Duplicate(&s->searchPath, &dirSearchPath, Dir_CopyDir); } } Var_Set(".INCLUDES", ptr = Dir_MakeFlags("-I", &inIncludes), VAR_GLOBAL); free(ptr); Var_Set(".LIBS", ptr = Dir_MakeFlags("-L", &inLibs), VAR_GLOBAL); free(ptr); Lst_Destroy(&inIncludes, Dir_Destroy); Lst_Destroy(&inLibs, Dir_Destroy); } /*- *----------------------------------------------------------------------- * 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) { LstNode *ln; Suff *s; ln = Lst_Find(&sufflist, sname, SuffSuffHasNameP); if (ln != NULL) { s = Lst_Datum(ln); 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) { LstNode *ln; Suff *s; ln = Lst_Find(&sufflist, sname, SuffSuffHasNameP); if (ln != NULL) { s = Lst_Datum(ln); s->flags |= SUFF_LIBRARY; } } /********** Implicit Source Search Functions *********/ /*- *----------------------------------------------------------------------- * SuffAddSrc -- * 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: * always returns 0 * * Side Effects: * A Src structure is created and tacked onto the end of the list *----------------------------------------------------------------------- */ static int SuffAddSrc(void *sp, void *lsp) { Suff *s = sp; LstSrc *ls = lsp; Src *s2; /* new Src structure */ Src *targ; /* Target structure */ targ = ls->s; if ((s->flags & SUFF_NULL) && (*s->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 = emalloc(sizeof(Src)); s2->file = estrdup(targ->pref); s2->pref = targ->pref; s2->parent = targ; s2->node = NULL; s2->suff = s; s->refCount++; s2->children = 0; targ->children += 1; Lst_AtEnd(ls->l, s2); #ifdef DEBUG_SRC Lst_Init(&s2->cp); Lst_AtEnd(&targ->cp, s2); printf("1 add %p %p to %p:", targ, s2, ls->l); Lst_ForEach(ls->l, PrintAddr, (void *)NULL); printf("\n"); #endif } s2 = emalloc(sizeof(Src)); s2->file = str_concat(targ->pref, s->name, 0); s2->pref = targ->pref; s2->parent = targ; s2->node = NULL; s2->suff = s; s->refCount++; s2->children = 0; targ->children += 1; Lst_AtEnd(ls->l, s2); #ifdef DEBUG_SRC Lst_Init(&s2->cp); Lst_AtEnd(&targ->cp, s2); printf("2 add %p %p to %p:", targ, s2, ls->l); Lst_ForEach(ls->l, PrintAddr, (void *)NULL); printf("\n"); #endif return (0); } /*- *----------------------------------------------------------------------- * SuffAddLevel -- * Add all the children of targ as Src structures to the given list * * Results: * None * * Side Effects: * Lots of structures are created and added to the list *----------------------------------------------------------------------- */ static void SuffAddLevel(Lst *l, Src *targ) { LstSrc ls; ls.s = targ; ls.l = l; Lst_ForEach(&targ->suff->children, SuffAddSrc, &ls); } /*- *---------------------------------------------------------------------- * 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(l, PrintAddr, (void *)NULL); 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 { printf("keep: [l=%p] p=%p %d: ", l, s, s->children); Lst_ForEach(&s->cp, PrintAddr, (void *)NULL); 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 = Dir_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 */ *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. */ ln = Lst_Find(&sufflist, &cp[prefLen], SuffSuffHasNameP); if (ln != 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. */ suff = Lst_Datum(ln); 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 = emalloc(sizeof(Src)); ret->file = estrdup(s->name); ret->pref = targ->pref; ret->suff = suff; suff->refCount++; ret->parent = targ; ret->node = s; ret->children = 0; targ->children += 1; #ifdef DEBUG_SRC Lst_Init(&ret->cp); 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); } /*- *----------------------------------------------------------------------- * 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 int SuffExpandChildren(void *cgnp, void *pgnp) { GNode *cgn = cgnp; GNode *pgn = pgnp; GNode *gn; /* New source 8) */ LstNode *prevLN; /* Node after which new source should be put */ LstNode *ln; /* List element for old source */ char *cp; /* Expanded value */ /* * New nodes effectively take the place of the child, so place them * after the child */ prevLN = Lst_Member(&pgn->children, cgn); /* * 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 on to the end of * the children list. */ if (strchr(cgn->name, '$') != NULL) { DEBUGF(SUFF, ("Expanding \"%s\"...", cgn->name)); cp = Var_Subst(NULL, cgn->name, pgn, TRUE); if (cp != NULL) { Lst members = Lst_Initializer(members); if (cgn->type & OP_ARCHV) { /* * Node was an archive(member) target, so we want to call * on the Arch module to find the nodes for us, expanding * variables in the parent's context. */ char *sacrifice = cp; Arch_ParseArchive(&sacrifice, &members, pgn); } else { /* * Break the result into a vector of strings whose nodes * we can find, then add those nodes to the members list. * Unfortunately, we can't use brk_string b/c it * doesn't understand about variable specifications with * spaces in them... */ char *start; char *initcp = cp; /* For freeing... */ for (start = cp; *start == ' ' || *start == '\t'; start++) continue; for (cp = start; *cp != '\0'; cp++) { if (*cp == ' ' || *cp == '\t') { /* * White-space -- terminate element, find the node, * add it, skip any further spaces. */ *cp++ = '\0'; gn = Targ_FindNode(start, TARG_CREATE); Lst_AtEnd(&members, gn); while (*cp == ' ' || *cp == '\t') { cp++; } /* * Adjust cp for increment at start of loop, but * set start to first non-space. */ start = cp--; } else if (*cp == '$') { /* * Start of a variable spec -- contact variable module * to find the end so we can skip over it. */ char *junk; size_t len; Boolean doFree; junk = Var_Parse(cp, pgn, 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 */ gn = Targ_FindNode(start, TARG_CREATE); Lst_AtEnd(&members, gn); } /* * Point cp back at the beginning again so the variable value * can be freed. */ cp = initcp; } /* * Add all elements of the members list to the parent node. */ while(!Lst_IsEmpty(&members)) { gn = Lst_DeQueue(&members); DEBUGF(SUFF, ("%s...", gn->name)); if (Lst_Member(&pgn->children, gn) == NULL) { Lst_Append(&pgn->children, prevLN, gn); prevLN = Lst_Succ(prevLN); Lst_AtEnd(&gn->parents, pgn); pgn->unmade++; } } /* * Free the result */ free(cp); } /* * Now the source is expanded, remove it from the list of children to * keep it from being processed. */ ln = Lst_Member(&pgn->children, cgn); pgn->unmade--; Lst_Remove(&pgn->children, ln); DEBUGF(SUFF, ("\n")); } else if (Dir_HasWildcards(cgn->name)) { Lst exp; /* List of expansions */ Lst *path; /* Search path along which to expand */ /* * 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. */ cp = cgn->name + strlen(cgn->name); ln = Lst_Find(&sufflist, cp, SuffSuffIsSuffixP); DEBUGF(SUFF, ("Wildcard expanding \"%s\"...", cgn->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); Dir_Expand(cgn->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)); gn = Targ_FindNode(cp, TARG_CREATE); /* * If gn isn't already a child of the parent, make it so and * up the parent's count of unmade children. */ if (Lst_Member(&pgn->children, gn) == NULL) { Lst_Append(&pgn->children, prevLN, gn); prevLN = Lst_Succ(prevLN); Lst_AtEnd(&gn->parents, pgn); pgn->unmade++; } } /* * Now the source is expanded, remove it from the list of children to * keep it from being processed. */ ln = Lst_Member(&pgn->children, cgn); pgn->unmade--; Lst_Remove(&pgn->children, ln); DEBUGF(SUFF, ("\n")); } return (0); } /*- *----------------------------------------------------------------------- * 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); ln = Lst_Find(&transforms, tname, SuffGNHasNameP); free(tname); if (ln == 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); } gn = Lst_Datum(ln); 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) { Lst_ForEachFrom(&tGn->children, ln, SuffExpandChildren, tGn); } /* * 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 */ GNode *mem; /* Node for member */ /* Variables to be copied from the member node */ static char *const copy[] = { TARGET, /* Must be first */ PREFIX, /* Must be second */ }; int i; /* Index into copy and vals */ Suff *ms; /* Suffix descriptor for member */ char *name; /* Start of member's name */ /* * 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. */ for (i = (sizeof(copy) / sizeof(copy[0]))-1; i >= 0; i--) { char *p1; Var_Set(copy[i], Var_Value(copy[i], mem, &p1), gn); free(p1); } 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... */ ln = Lst_Find(&ms->parents, eoarch, SuffSuffIsSuffixP); 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... */ ln = Lst_FindFrom(&sufflist, ln, eoname, SuffSuffIsSuffixP); if (ln != NULL) { int prefLen; /* Length of the prefix */ Src *target; /* * Allocate a Src structure to which things can be transformed */ target = emalloc(sizeof(Src)); target->file = estrdup(gn->name); target->suff = Lst_Datum(ln); target->suff->refCount++; target->node = gn; target->parent = NULL; target->children = 0; #ifdef DEBUG_SRC Lst_Init(&target->cp); #endif /* * 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; 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 = emalloc(sizeof(Src)); targ->file = estrdup(gn->name); targ->suff = suffNull; targ->suff->refCount++; targ->node = gn; targ->parent = NULL; targ->children = 0; targ->pref = estrdup(sopref); #ifdef DEBUG_SRC Lst_Init(&targ->cp); #endif /* * 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. */ Lst_ForEach(&gn->children, SuffExpandChildren, (void *)gn); 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 = Dir_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). */ LstNode *ln; Suff *s; ln = Lst_Find(&sufflist, LIBSUFF, SuffSuffHasNameP); if (gn->suffix) gn->suffix->refCount--; if (ln != NULL) { gn->suffix = s = Lst_Datum(ln); 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; LstNode *ln; ln = Lst_Find(&sufflist, name, SuffSuffHasNameP); if (ln != NULL) { s = Lst_Datum(ln); if (suffNull != NULL) { suffNull->flags &= ~SUFF_NULL; } s->flags |= SUFF_NULL; /* * XXX: Here's where the transformation mangling would take place */ suffNull = s; } else { Parse_Error(PARSE_WARNING, "Desired null suffix %s not defined.", name); } } /*- *----------------------------------------------------------------------- * 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; Lst_Init(&suffNull->searchPath); Dir_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 **********************/ static int SuffPrintName(void *s, void *dummy __unused) { printf("`%s' ", ((Suff *)s)->name); return (0); } static int SuffPrintSuff(void *sp, void *dummy __unused) { Suff *s = sp; int flags; int flag; printf("# `%s' [%d] ", s->name, s->refCount); flags = s->flags; if (flags) { fputs(" (", stdout); while (flags) { flag = 1 << (ffs(flags) - 1); flags &= ~flag; switch (flag) { case SUFF_NULL: printf("NULL"); break; case SUFF_INCLUDE: printf("INCLUDE"); break; case SUFF_LIBRARY: printf("LIBRARY"); break; default: break; } fputc(flags ? '|' : ')', stdout); } } fputc('\n', stdout); printf("#\tTo: "); Lst_ForEach(&s->parents, SuffPrintName, (void *)NULL); fputc('\n', stdout); printf("#\tFrom: "); Lst_ForEach(&s->children, SuffPrintName, (void *)NULL); fputc('\n', stdout); printf("#\tSearch Path: "); Dir_PrintPath(&s->searchPath); fputc('\n', stdout); return (0); } static int SuffPrintTrans(void *tp, void *dummy __unused) { GNode *t = tp; printf("%-16s: ", t->name); Targ_PrintType(t->type); fputc('\n', stdout); Lst_ForEach(&t->commands, Targ_PrintCmd, (void *)NULL); fputc('\n', stdout); return (0); } void Suff_PrintAll(void) { printf("#*** Suffixes:\n"); Lst_ForEach(&sufflist, SuffPrintSuff, (void *)NULL); printf("#*** Transformations:\n"); Lst_ForEach(&transforms, SuffPrintTrans, (void *)NULL); } #ifdef DEBUG_SRC /* * Printaddr -- * Print the address of a node. */ static int PrintAddr(void *a, void *b __unused) { printf("%p ", a); return (0); } #endif /* DEBUG_SRC */