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Diffstat (limited to 'usr.bin/make/parse.c')
| -rw-r--r-- | usr.bin/make/parse.c | 2545 |
1 files changed, 0 insertions, 2545 deletions
diff --git a/usr.bin/make/parse.c b/usr.bin/make/parse.c deleted file mode 100644 index 134d905..0000000 --- a/usr.bin/make/parse.c +++ /dev/null @@ -1,2545 +0,0 @@ -/*- - * 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. - * - * @(#)parse.c 8.3 (Berkeley) 3/19/94 - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -/*- - * parse.c -- - * Functions to parse a makefile. - * - * Most important structures are kept in Lsts. Directories for - * the #include "..." function are kept in the 'parseIncPath' Lst, while - * those for the #include <...> are kept in the 'sysIncPath' Lst. The - * targets currently being defined are kept in the 'targets' Lst. - * - * Interface: - * - * Parse_File Function used to parse a makefile. It must - * be given the name of the file, which should - * already have been opened, and a function - * to call to read a character from the file. - * - * Parse_IsVar Returns TRUE if the given line is a - * variable assignment. Used by MainParseArgs - * to determine if an argument is a target - * or a variable assignment. Used internally - * for pretty much the same thing... - * - * Parse_Error Function called when an error occurs in - * parsing. Used by the variable and - * conditional modules. - * - * Parse_MainName Returns a Lst of the main target to create. - */ - -#include <assert.h> -#include <ctype.h> -#include <stdarg.h> -#include <string.h> -#include <stdlib.h> -#include <err.h> - -#include "arch.h" -#include "buf.h" -#include "cond.h" -#include "config.h" -#include "dir.h" -#include "for.h" -#include "globals.h" -#include "GNode.h" -#include "hash_tables.h" -#include "job.h" -#include "make.h" -#include "parse.h" -#include "pathnames.h" -#include "shell.h" -#include "str.h" -#include "suff.h" -#include "targ.h" -#include "util.h" -#include "var.h" - -/* - * These values are returned by ParsePopInput to tell Parse_File whether to - * CONTINUE parsing, i.e. it had only reached the end of an include file, - * or if it's DONE. - */ -#define CONTINUE 1 -#define DONE 0 - -/* targets we're working on */ -static Lst targets = Lst_Initializer(targets); - -/* true if currently in a dependency line or its commands */ -static Boolean inLine; - -static int fatals = 0; - -/* - * The main target to create. This is the first target on the - * first dependency line in the first makefile. - */ -static GNode *mainNode; - -/* - * Definitions for handling #include specifications - */ -struct IFile { - char *fname; /* name of previous file */ - int lineno; /* saved line number */ - FILE *F; /* the open stream */ - char *str; /* the string when parsing a string */ - char *ptr; /* the current pointer when parsing a string */ - TAILQ_ENTRY(IFile) link;/* stack the files */ -}; - -/* stack of IFiles generated by * #includes */ -static TAILQ_HEAD(, IFile) includes = TAILQ_HEAD_INITIALIZER(includes); - -/* access current file */ -#define CURFILE (TAILQ_FIRST(&includes)) - -/* list of directories for "..." includes */ -struct Path parseIncPath = TAILQ_HEAD_INITIALIZER(parseIncPath); - -/* list of directories for <...> includes */ -struct Path sysIncPath = TAILQ_HEAD_INITIALIZER(sysIncPath); - -/* - * specType contains the SPECial TYPE of the current target. It is - * Not if the target is unspecial. If it *is* special, however, the children - * are linked as children of the parent but not vice versa. This variable is - * set in ParseDoDependency - */ -typedef enum { - Begin, /* .BEGIN */ - Default, /* .DEFAULT */ - End, /* .END */ - ExportVar, /* .EXPORTVAR */ - Ignore, /* .IGNORE */ - Includes, /* .INCLUDES */ - Interrupt, /* .INTERRUPT */ - Libs, /* .LIBS */ - MFlags, /* .MFLAGS or .MAKEFLAGS */ - Main, /* .MAIN and we don't have anyth. user-spec. to make */ - Not, /* Not special */ - NotParallel, /* .NOTPARALELL */ - Null, /* .NULL */ - Order, /* .ORDER */ - Parallel, /* .PARALLEL */ - ExPath, /* .PATH */ - Phony, /* .PHONY */ - Posix, /* .POSIX */ - MakefileDeps, /* .MAKEFILEDEPS */ - Precious, /* .PRECIOUS */ - ExShell, /* .SHELL */ - Silent, /* .SILENT */ - SingleShell, /* .SINGLESHELL */ - Suffixes, /* .SUFFIXES */ - Wait, /* .WAIT */ - Warn, /* .WARN */ - Attribute /* Generic attribute */ -} ParseSpecial; - -static ParseSpecial specType; -static int waiting; - -/* - * Predecessor node for handling .ORDER. Initialized to NULL when .ORDER - * seen, then set to each successive source on the line. - */ -static GNode *predecessor; - -/* - * The parseKeywords table is searched using binary search when deciding - * if a target or source is special. The 'spec' field is the ParseSpecial - * type of the keyword ("Not" if the keyword isn't special as a target) while - * the 'op' field is the operator to apply to the list of targets if the - * keyword is used as a source ("0" if the keyword isn't special as a source) - */ -static const struct keyword { - const char *name; /* Name of keyword */ - ParseSpecial spec; /* Type when used as a target */ - int op; /* Operator when used as a source */ -} parseKeywords[] = { - /* KEYWORD-START-TAG */ - { ".BEGIN", Begin, 0 }, - { ".DEFAULT", Default, 0 }, - { ".END", End, 0 }, - { ".EXEC", Attribute, OP_EXEC }, - { ".EXPORTVAR", ExportVar, 0 }, - { ".IGNORE", Ignore, OP_IGNORE }, - { ".INCLUDES", Includes, 0 }, - { ".INTERRUPT", Interrupt, 0 }, - { ".INVISIBLE", Attribute, OP_INVISIBLE }, - { ".JOIN", Attribute, OP_JOIN }, - { ".LIBS", Libs, 0 }, - { ".MAIN", Main, 0 }, - { ".MAKE", Attribute, OP_MAKE }, - { ".MAKEFILEDEPS", MakefileDeps, 0 }, - { ".MAKEFLAGS", MFlags, 0 }, - { ".MFLAGS", MFlags, 0 }, - { ".NOTMAIN", Attribute, OP_NOTMAIN }, - { ".NOTPARALLEL", NotParallel, 0 }, - { ".NO_PARALLEL", NotParallel, 0 }, - { ".NULL", Null, 0 }, - { ".OPTIONAL", Attribute, OP_OPTIONAL }, - { ".ORDER", Order, 0 }, - { ".PARALLEL", Parallel, 0 }, - { ".PATH", ExPath, 0 }, - { ".PHONY", Phony, OP_PHONY }, - { ".POSIX", Posix, 0 }, - { ".PRECIOUS", Precious, OP_PRECIOUS }, - { ".RECURSIVE", Attribute, OP_MAKE }, - { ".SHELL", ExShell, 0 }, - { ".SILENT", Silent, OP_SILENT }, - { ".SINGLESHELL", SingleShell, 0 }, - { ".SUFFIXES", Suffixes, 0 }, - { ".USE", Attribute, OP_USE }, - { ".WAIT", Wait, 0 }, - { ".WARN", Warn, 0 }, - /* KEYWORD-END-TAG */ -}; -#define NKEYWORDS (sizeof(parseKeywords) / sizeof(parseKeywords[0])) - -static void parse_include(char *, int, int); -static void parse_sinclude(char *, int, int); -static void parse_message(char *, int, int); -static void parse_undef(char *, int, int); -static void parse_for(char *, int, int); -static void parse_endfor(char *, int, int); - -static const struct directive { - const char *name; - int code; - Boolean skip_flag; /* execute even when skipped */ - void (*func)(char *, int, int); -} directives[] = { - /* DIRECTIVES-START-TAG */ - { "elif", COND_ELIF, TRUE, Cond_If }, - { "elifdef", COND_ELIFDEF, TRUE, Cond_If }, - { "elifmake", COND_ELIFMAKE, TRUE, Cond_If }, - { "elifndef", COND_ELIFNDEF, TRUE, Cond_If }, - { "elifnmake", COND_ELIFNMAKE, TRUE, Cond_If }, - { "else", COND_ELSE, TRUE, Cond_Else }, - { "endfor", 0, FALSE, parse_endfor }, - { "endif", COND_ENDIF, TRUE, Cond_Endif }, - { "error", 1, FALSE, parse_message }, - { "for", 0, FALSE, parse_for }, - { "if", COND_IF, TRUE, Cond_If }, - { "ifdef", COND_IFDEF, TRUE, Cond_If }, - { "ifmake", COND_IFMAKE, TRUE, Cond_If }, - { "ifndef", COND_IFNDEF, TRUE, Cond_If }, - { "ifnmake", COND_IFNMAKE, TRUE, Cond_If }, - { "include", 0, FALSE, parse_include }, - { "sinclude", 0, FALSE, parse_sinclude }, - { "undef", 0, FALSE, parse_undef }, - { "warning", 0, FALSE, parse_message }, - /* DIRECTIVES-END-TAG */ -}; -#define NDIRECTS (sizeof(directives) / sizeof(directives[0])) - -/*- - * ParseFindKeyword - * Look in the table of keywords for one matching the given string. - * - * Results: - * The pointer to keyword table entry or NULL. - */ -static const struct keyword * -ParseFindKeyword(const char *str) -{ - int kw; - - kw = keyword_hash(str, strlen(str)); - if (kw < 0 || kw >= (int)NKEYWORDS || - strcmp(str, parseKeywords[kw].name) != 0) - return (NULL); - return (&parseKeywords[kw]); -} - -/*- - * Parse_Error -- - * Error message abort function for parsing. Prints out the context - * of the error (line number and file) as well as the message with - * two optional arguments. - * - * Results: - * None - * - * Side Effects: - * "fatals" is incremented if the level is PARSE_FATAL. - */ -/* VARARGS */ -void -Parse_Error(int type, const char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - if (CURFILE != NULL) - fprintf(stderr, "\"%s\", line %d: ", - CURFILE->fname, CURFILE->lineno); - if (type == PARSE_WARNING) - fprintf(stderr, "warning: "); - vfprintf(stderr, fmt, ap); - va_end(ap); - fprintf(stderr, "\n"); - fflush(stderr); - if (type == PARSE_FATAL) - fatals += 1; -} - -/** - * ParsePushInput - * - * Push a new input source onto the input stack. If ptr is NULL - * the fullname is used to fopen the file. If it is not NULL, - * ptr is assumed to point to the string to be parsed. If opening the - * file fails, the fullname is freed. - */ -static void -ParsePushInput(char *fullname, FILE *fp, char *ptr, int lineno) -{ - struct IFile *nf; - - nf = emalloc(sizeof(*nf)); - nf->fname = fullname; - nf->lineno = lineno; - - if (ptr == NULL) { - /* the input source is a file */ - if ((nf->F = fp) == NULL) { - nf->F = fopen(fullname, "r"); - if (nf->F == NULL) { - Parse_Error(PARSE_FATAL, "Cannot open %s", - fullname); - free(fullname); - free(nf); - return; - } - } - nf->str = nf->ptr = NULL; - Var_Append(".MAKEFILE_LIST", fullname, VAR_GLOBAL); - } else { - nf->str = nf->ptr = ptr; - nf->F = NULL; - } - TAILQ_INSERT_HEAD(&includes, nf, link); -} - -/** - * ParsePopInput - * Called when EOF is reached in the current file. If we were reading - * an include file, the includes stack is popped and things set up - * to go back to reading the previous file at the previous location. - * - * Results: - * CONTINUE if there's more to do. DONE if not. - * - * Side Effects: - * The old curFile.F is closed. The includes list is shortened. - * curFile.lineno, curFile.F, and curFile.fname are changed if - * CONTINUE is returned. - */ -static int -ParsePopInput(void) -{ - struct IFile *ifile; /* the state on the top of the includes stack */ - - assert(!TAILQ_EMPTY(&includes)); - - ifile = TAILQ_FIRST(&includes); - TAILQ_REMOVE(&includes, ifile, link); - - free(ifile->fname); - if (ifile->F != NULL) { - fclose(ifile->F); - Var_Append(".MAKEFILE_LIST", "..", VAR_GLOBAL); - } - if (ifile->str != NULL) { - free(ifile->str); - } - free(ifile); - - return (TAILQ_EMPTY(&includes) ? DONE : CONTINUE); -} - -/** - * parse_warn - * Parse the .WARN pseudo-target. - */ -static void -parse_warn(char *line) -{ - ArgArray aa; - int i; - - brk_string(&aa, line, TRUE); - - for (i = 1; i < aa.argc; i++) - Main_ParseWarn(aa.argv[i], 0); -} - -/*- - *--------------------------------------------------------------------- - * ParseLinkSrc -- - * Link the parent nodes to their new child. Used by - * ParseDoDependency. If the specType isn't 'Not', the parent - * isn't linked as a parent of the child. - * - * Side Effects: - * New elements are added to the parents lists of cgn and the - * children list of cgn. the unmade field of pgn is updated - * to reflect the additional child. - *--------------------------------------------------------------------- - */ -static void -ParseLinkSrc(Lst *parents, GNode *cgn) -{ - LstNode *ln; - GNode *pgn; - - LST_FOREACH(ln, parents) { - pgn = Lst_Datum(ln); - if (Lst_Member(&pgn->children, cgn) == NULL) { - Lst_AtEnd(&pgn->children, cgn); - if (specType == Not) { - Lst_AtEnd(&cgn->parents, pgn); - } - pgn->unmade += 1; - } - } -} - -/*- - *--------------------------------------------------------------------- - * ParseDoOp -- - * Apply the parsed operator to all target nodes. Used in - * ParseDoDependency once all targets have been found and their - * operator parsed. If the previous and new operators are incompatible, - * a major error is taken. - * - * Side Effects: - * The type field of the node is altered to reflect any new bits in - * the op. - *--------------------------------------------------------------------- - */ -static void -ParseDoOp(int op) -{ - GNode *cohort; - LstNode *ln; - GNode *gn; - - LST_FOREACH(ln, &targets) { - gn = Lst_Datum(ln); - - /* - * If the dependency mask of the operator and the node don't - * match and the node has actually had an operator applied to - * it before, and the operator actually has some dependency - * information in it, complain. - */ - if ((op & OP_OPMASK) != (gn->type & OP_OPMASK) && - !OP_NOP(gn->type) && !OP_NOP(op)) { - Parse_Error(PARSE_FATAL, "Inconsistent operator for %s", - gn->name); - return; - } - - if (op == OP_DOUBLEDEP && - (gn->type & OP_OPMASK) == OP_DOUBLEDEP) { - /* - * If the node was the object of a :: operator, we need - * to create a new instance of it for the children and - * commands on this dependency line. The new instance - * is placed on the 'cohorts' list of the initial one - * (note the initial one is not on its own cohorts list) - * and the new instance is linked to all parents of the - * initial instance. - */ - cohort = Targ_NewGN(gn->name); - - /* - * Duplicate links to parents so graph traversal is - * simple. Perhaps some type bits should be duplicated? - * - * Make the cohort invisible as well to avoid - * duplicating it into other variables. True, parents - * of this target won't tend to do anything with their - * local variables, but better safe than sorry. - */ - ParseLinkSrc(&gn->parents, cohort); - cohort->type = OP_DOUBLEDEP|OP_INVISIBLE; - Lst_AtEnd(&gn->cohorts, cohort); - - /* - * Replace the node in the targets list with the - * new copy - */ - Lst_Replace(ln, cohort); - gn = cohort; - } - /* - * We don't want to nuke any previous flags (whatever they were) - * so we just OR the new operator into the old - */ - gn->type |= op; - } -} - -/*- - *--------------------------------------------------------------------- - * ParseDoSrc -- - * Given the name of a source, figure out if it is an attribute - * and apply it to the targets if it is. Else decide if there is - * some attribute which should be applied *to* the source because - * of some special target and apply it if so. Otherwise, make the - * source be a child of the targets in the list 'targets' - * - * Results: - * None - * - * Side Effects: - * Operator bits may be added to the list of targets or to the source. - * The targets may have a new source added to their lists of children. - *--------------------------------------------------------------------- - */ -static void -ParseDoSrc(int tOp, char *src, Lst *allsrc) -{ - GNode *gn = NULL; - const struct keyword *kw; - - if (src[0] == '.' && isupper ((unsigned char)src[1])) { - if ((kw = ParseFindKeyword(src)) != NULL) { - if (kw->op != 0) { - ParseDoOp(kw->op); - return; - } - if (kw->spec == Wait) { - waiting++; - return; - } - } - } - - switch (specType) { - case Main: - /* - * If we have noted the existence of a .MAIN, it means we need - * to add the sources of said target to the list of things - * to create. The string 'src' is likely to be free, so we - * must make a new copy of it. Note that this will only be - * invoked if the user didn't specify a target on the command - * line. This is to allow #ifmake's to succeed, or something... - */ - Lst_AtEnd(&create, estrdup(src)); - /* - * Add the name to the .TARGETS variable as well, so the user - * can employ that, if desired. - */ - Var_Append(".TARGETS", src, VAR_GLOBAL); - return; - - case Order: - /* - * Create proper predecessor/successor links between the - * previous source and the current one. - */ - gn = Targ_FindNode(src, TARG_CREATE); - if (predecessor != NULL) { - Lst_AtEnd(&predecessor->successors, gn); - Lst_AtEnd(&gn->preds, predecessor); - } - /* - * The current source now becomes the predecessor for the next - * one. - */ - predecessor = gn; - break; - - default: - /* - * If the source is not an attribute, we need to find/create - * a node for it. After that we can apply any operator to it - * from a special target or link it to its parents, as - * appropriate. - * - * In the case of a source that was the object of a :: operator, - * the attribute is applied to all of its instances (as kept in - * the 'cohorts' list of the node) or all the cohorts are linked - * to all the targets. - */ - gn = Targ_FindNode(src, TARG_CREATE); - if (tOp) { - gn->type |= tOp; - } else { - ParseLinkSrc(&targets, gn); - } - if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) { - GNode *cohort; - LstNode *ln; - - for (ln = Lst_First(&gn->cohorts); ln != NULL; - ln = Lst_Succ(ln)) { - cohort = Lst_Datum(ln); - if (tOp) { - cohort->type |= tOp; - } else { - ParseLinkSrc(&targets, cohort); - } - } - } - break; - } - - gn->order = waiting; - Lst_AtEnd(allsrc, gn); - if (waiting) { - LstNode *ln; - GNode *p; - - /* - * Check if GNodes needs to be synchronized. - * This has to be when two nodes are on different sides of a - * .WAIT directive. - */ - LST_FOREACH(ln, allsrc) { - p = Lst_Datum(ln); - - if (p->order >= gn->order) - break; - /* - * XXX: This can cause loops, and loops can cause - * unmade targets, but checking is tedious, and the - * debugging output can show the problem - */ - Lst_AtEnd(&p->successors, gn); - Lst_AtEnd(&gn->preds, p); - } - } -} - - -/*- - *--------------------------------------------------------------------- - * ParseDoDependency -- - * Parse the dependency line in line. - * - * Results: - * None - * - * Side Effects: - * The nodes of the sources are linked as children to the nodes of the - * targets. Some nodes may be created. - * - * We parse a dependency line by first extracting words from the line and - * finding nodes in the list of all targets with that name. This is done - * until a character is encountered which is an operator character. Currently - * these are only ! and :. At this point the operator is parsed and the - * pointer into the line advanced until the first source is encountered. - * The parsed operator is applied to each node in the 'targets' list, - * which is where the nodes found for the targets are kept, by means of - * the ParseDoOp function. - * The sources are read in much the same way as the targets were except - * that now they are expanded using the wildcarding scheme of the C-Shell - * and all instances of the resulting words in the list of all targets - * are found. Each of the resulting nodes is then linked to each of the - * targets as one of its children. - * Certain targets are handled specially. These are the ones detailed - * by the specType variable. - * The storing of transformation rules is also taken care of here. - * A target is recognized as a transformation rule by calling - * Suff_IsTransform. If it is a transformation rule, its node is gotten - * from the suffix module via Suff_AddTransform rather than the standard - * Targ_FindNode in the target module. - *--------------------------------------------------------------------- - */ -static void -ParseDoDependency(char *line) -{ - char *cp; /* our current position */ - char *lstart = line; /* original input line */ - GNode *gn; /* a general purpose temporary node */ - int op; /* the operator on the line */ - char savec; /* a place to save a character */ - Lst paths; /* Search paths to alter when parsing .PATH targets */ - int tOp; /* operator from special target */ - LstNode *ln; - const struct keyword *kw; - - tOp = 0; - - specType = Not; - waiting = 0; - Lst_Init(&paths); - - do { - for (cp = line; - *cp && !isspace((unsigned char)*cp) && *cp != '('; - cp++) { - if (*cp == '$') { - /* - * Must be a dynamic source (would have been - * expanded otherwise), so call the Var module - * to parse the puppy so we can safely advance - * beyond it...There should be no errors in this - * as they would have been discovered in the - * initial Var_Subst and we wouldn't be here. - */ - size_t length = 0; - Boolean freeIt; - char *result; - - result = Var_Parse(cp, VAR_CMD, TRUE, - &length, &freeIt); - - if (freeIt) { - free(result); - } - cp += length - 1; - - } else if (*cp == '!' || *cp == ':') { - /* - * We don't want to end a word on ':' or '!' if - * there is a better match later on in the - * string (greedy matching). - * This allows the user to have targets like: - * fie::fi:fo: fum - * foo::bar: - * where "fie::fi:fo" and "foo::bar" are the - * targets. In real life this is used for perl5 - * library man pages where "::" separates an - * object from its class. Ie: - * "File::Spec::Unix". This behaviour is also - * consistent with other versions of make. - */ - char *p = cp + 1; - - if (*cp == ':' && *p == ':') - p++; - - /* Found the best match already. */ - if (*p == '\0' || isspace(*p)) - break; - - p += strcspn(p, "!:"); - - /* No better match later on... */ - if (*p == '\0') - break; - } - continue; - } - if (*cp == '(') { - /* - * Archives must be handled specially to make sure the - * OP_ARCHV flag is set in their 'type' field, for one - * thing, and because things like "archive(file1.o - * file2.o file3.o)" are permissible. Arch_ParseArchive - * will set 'line' to be the first non-blank after the - * archive-spec. It creates/finds nodes for the members - * and places them on the given list, returning TRUE - * if all went well and FALSE if there was an error in - * the specification. On error, line should remain - * untouched. - */ - if (!Arch_ParseArchive(&line, &targets, VAR_CMD)) { - Parse_Error(PARSE_FATAL, - "Error in archive specification: \"%s\"", - line); - return; - } else { - cp = line; - continue; - } - } - savec = *cp; - - if (!*cp) { - /* - * Ending a dependency line without an operator is a * Bozo no-no. As a heuristic, this is also often - * triggered by undetected conflicts from cvs/rcs - * merges. - */ - if (strncmp(line, "<<<<<<", 6) == 0 || - strncmp(line, "||||||", 6) == 0 || - strncmp(line, "======", 6) == 0 || - strncmp(line, ">>>>>>", 6) == 0) { - Parse_Error(PARSE_FATAL, "Makefile appears to " - "contain unresolved cvs/rcs/??? merge " - "conflicts"); - } else - Parse_Error(PARSE_FATAL, lstart[0] == '.' ? - "Unknown directive" : "Need an operator"); - return; - } - *cp = '\0'; - /* - * Have a word in line. See if it's a special target and set - * specType to match it. - */ - if (*line == '.' && isupper((unsigned char)line[1])) { - /* - * See if the target is a special target that must have - * it or its sources handled specially. - */ - if ((kw = ParseFindKeyword(line)) != NULL) { - if (specType == ExPath && kw->spec != ExPath) { - Parse_Error(PARSE_FATAL, - "Mismatched special targets"); - return; - } - - specType = kw->spec; - tOp = kw->op; - - /* - * Certain special targets have special - * semantics: - * .PATH Have to set the dirSearchPath - * variable too - * .MAIN Its sources are only used if - * nothing has been specified to - * create. - * .DEFAULT Need to create a node to hang - * commands on, but we don't want - * it in the graph, nor do we want - * it to be the Main Target, so we - * create it, set OP_NOTMAIN and - * add it to the list, setting - * DEFAULT to the new node for - * later use. We claim the node is - * A transformation rule to make - * life easier later, when we'll - * use Make_HandleUse to actually - * apply the .DEFAULT commands. - * .PHONY The list of targets - * .BEGIN - * .END - * .INTERRUPT Are not to be considered the - * main target. - * .NOTPARALLEL Make only one target at a time. - * .SINGLESHELL Create a shell for each - * command. - * .ORDER Must set initial predecessor - * to NULL - */ - switch (specType) { - case ExPath: - Lst_AtEnd(&paths, &dirSearchPath); - break; - case Main: - if (!Lst_IsEmpty(&create)) { - specType = Not; - } - break; - case Begin: - case End: - case Interrupt: - gn = Targ_FindNode(line, TARG_CREATE); - gn->type |= OP_NOTMAIN; - Lst_AtEnd(&targets, gn); - break; - case Default: - gn = Targ_NewGN(".DEFAULT"); - gn->type |= (OP_NOTMAIN|OP_TRANSFORM); - Lst_AtEnd(&targets, gn); - DEFAULT = gn; - break; - case NotParallel: - jobLimit = 1; - break; - case SingleShell: - compatMake = 1; - break; - case Order: - predecessor = NULL; - break; - default: - break; - } - - } else if (strncmp(line, ".PATH", 5) == 0) { - /* - * .PATH<suffix> has to be handled specially. - * Call on the suffix module to give us a path - * to modify. - */ - struct Path *path; - - specType = ExPath; - path = Suff_GetPath(&line[5]); - if (path == NULL) { - Parse_Error(PARSE_FATAL, "Suffix '%s' " - "not defined (yet)", &line[5]); - return; - } else - Lst_AtEnd(&paths, path); - } - } - - /* - * Have word in line. Get or create its node and stick it at - * the end of the targets list - */ - if (specType == Not && *line != '\0') { - - /* target names to be found and added to targets list */ - Lst curTargs = Lst_Initializer(curTargs); - - if (Dir_HasWildcards(line)) { - /* - * Targets are to be sought only in the current - * directory, so create an empty path for the - * thing. Note we need to use Path_Clear in the - * destruction of the path as the Dir module - * could have added a directory to the path... - */ - struct Path emptyPath = - TAILQ_HEAD_INITIALIZER(emptyPath); - - Path_Expand(line, &emptyPath, &curTargs); - Path_Clear(&emptyPath); - - } else { - /* - * No wildcards, but we want to avoid code - * duplication, so create a list with the word - * on it. - */ - Lst_AtEnd(&curTargs, line); - } - - while (!Lst_IsEmpty(&curTargs)) { - char *targName = Lst_DeQueue(&curTargs); - - if (!Suff_IsTransform (targName)) { - gn = Targ_FindNode(targName, - TARG_CREATE); - } else { - gn = Suff_AddTransform(targName); - } - - Lst_AtEnd(&targets, gn); - } - } else if (specType == ExPath && *line != '.' && *line != '\0'){ - Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", - line); - } - - *cp = savec; - /* - * If it is a special type and not .PATH, it's the only - * target we allow on this line... - */ - if (specType != Not && specType != ExPath) { - Boolean warnFlag = FALSE; - - while (*cp != '!' && *cp != ':' && *cp) { - if (*cp != ' ' && *cp != '\t') { - warnFlag = TRUE; - } - cp++; - } - if (warnFlag) { - Parse_Error(PARSE_WARNING, - "Extra target ignored"); - } - } else { - while (*cp && isspace((unsigned char)*cp)) { - cp++; - } - } - line = cp; - } while (*line != '!' && *line != ':' && *line); - - if (!Lst_IsEmpty(&targets)) { - switch (specType) { - default: - Parse_Error(PARSE_WARNING, "Special and mundane " - "targets don't mix. Mundane ones ignored"); - break; - case Default: - case Begin: - case End: - case Interrupt: - /* - * These four create nodes on which to hang commands, so - * targets shouldn't be empty... - */ - case Not: - /* - * Nothing special here -- targets can be empty if it - * wants. - */ - break; - } - } - - /* - * Have now parsed all the target names. Must parse the operator next. - * The result is left in op. - */ - if (*cp == '!') { - op = OP_FORCE; - } else if (*cp == ':') { - if (cp[1] == ':') { - op = OP_DOUBLEDEP; - cp++; - } else { - op = OP_DEPENDS; - } - } else { - Parse_Error(PARSE_FATAL, lstart[0] == '.' ? - "Unknown directive" : "Missing dependency operator"); - return; - } - - cp++; /* Advance beyond operator */ - - ParseDoOp(op); - - /* - * Get to the first source - */ - while (*cp && isspace((unsigned char)*cp)) { - cp++; - } - line = cp; - - /* - * Several special targets take different actions if present with no - * sources: - * a .SUFFIXES line with no sources clears out all old suffixes - * a .PRECIOUS line makes all targets precious - * a .IGNORE line ignores errors for all targets - * a .SILENT line creates silence when making all targets - * a .PATH removes all directories from the search path(s). - */ - if (!*line) { - switch (specType) { - case Suffixes: - Suff_ClearSuffixes(); - break; - case Precious: - allPrecious = TRUE; - break; - case Ignore: - ignoreErrors = TRUE; - break; - case Silent: - beSilent = TRUE; - break; - case ExPath: - LST_FOREACH(ln, &paths) - Path_Clear(Lst_Datum(ln)); - break; - case MakefileDeps: - mfAutoDeps = TRUE; - break; - case Posix: - is_posix = TRUE; - Var_SetGlobal("%POSIX", "1003.2"); - break; - default: - break; - } - - } else if (specType == MFlags) { - /* - * Call on functions in main.c to deal with these arguments and - * set the initial character to a null-character so the loop to - * get sources won't get anything - */ - Main_ParseArgLine(line, 0); - *line = '\0'; - - } else if (specType == Warn) { - parse_warn(line); - *line = '\0'; - - } else if (specType == ExShell) { - if (!Shell_Parse(line)) { - Parse_Error(PARSE_FATAL, - "improper shell specification"); - return; - } - *line = '\0'; - - } else if (specType == NotParallel || specType == SingleShell) { - *line = '\0'; - } - - /* - * NOW GO FOR THE SOURCES - */ - if (specType == Suffixes || specType == ExPath || - specType == Includes || specType == Libs || - specType == Null) { - while (*line) { - /* - * If the target was one that doesn't take files as its - * sources but takes something like suffixes, we take - * each space-separated word on the line as a something - * and deal with it accordingly. - * - * If the target was .SUFFIXES, we take each source as - * a suffix and add it to the list of suffixes - * maintained by the Suff module. - * - * If the target was a .PATH, we add the source as a - * directory to search on the search path. - * - * If it was .INCLUDES, the source is taken to be the - * suffix of files which will be #included and whose - * search path should be present in the .INCLUDES - * variable. - * - * If it was .LIBS, the source is taken to be the - * suffix of files which are considered libraries and - * whose search path should be present in the .LIBS - * variable. - * - * If it was .NULL, the source is the suffix to use - * when a file has no valid suffix. - */ - char savech; - while (*cp && !isspace((unsigned char)*cp)) { - cp++; - } - savech = *cp; - *cp = '\0'; - switch (specType) { - case Suffixes: - Suff_AddSuffix(line); - break; - case ExPath: - LST_FOREACH(ln, &paths) - Path_AddDir(Lst_Datum(ln), line); - break; - case Includes: - Suff_AddInclude(line); - break; - case Libs: - Suff_AddLib(line); - break; - case Null: - Suff_SetNull(line); - break; - default: - break; - } - *cp = savech; - if (savech != '\0') { - cp++; - } - while (*cp && isspace((unsigned char)*cp)) { - cp++; - } - line = cp; - } - Lst_Destroy(&paths, NOFREE); - - } else if (specType == ExportVar) { - Var_SetEnv(line, VAR_GLOBAL); - - } else { - /* list of sources in order */ - Lst curSrcs = Lst_Initializer(curSrc); - - while (*line) { - /* - * The targets take real sources, so we must beware of - * archive specifications (i.e. things with left - * parentheses in them) and handle them accordingly. - */ - while (*cp && !isspace((unsigned char)*cp)) { - if (*cp == '(' && cp > line && cp[-1] != '$') { - /* - * Only stop for a left parenthesis if - * it isn't at the start of a word - * (that'll be for variable changes - * later) and isn't preceded by a dollar - * sign (a dynamic source). - */ - break; - } else { - cp++; - } - } - - if (*cp == '(') { - GNode *gnp; - - /* list of archive source names after exp. */ - Lst sources = Lst_Initializer(sources); - - if (!Arch_ParseArchive(&line, &sources, - VAR_CMD)) { - Parse_Error(PARSE_FATAL, "Error in " - "source archive spec \"%s\"", line); - return; - } - - while (!Lst_IsEmpty(&sources)) { - gnp = Lst_DeQueue(&sources); - ParseDoSrc(tOp, gnp->name, &curSrcs); - } - cp = line; - } else { - if (*cp) { - *cp = '\0'; - cp += 1; - } - - ParseDoSrc(tOp, line, &curSrcs); - } - while (*cp && isspace((unsigned char)*cp)) { - cp++; - } - line = cp; - } - Lst_Destroy(&curSrcs, NOFREE); - } - - if (mainNode == NULL) { - /* - * If we have yet to decide on a main target to make, in the - * absence of any user input, we want the first target on - * the first dependency line that is actually a real target - * (i.e. isn't a .USE or .EXEC rule) to be made. - */ - LST_FOREACH(ln, &targets) { - gn = Lst_Datum(ln); - if ((gn->type & (OP_NOTMAIN | OP_USE | - OP_EXEC | OP_TRANSFORM)) == 0) { - mainNode = gn; - Targ_SetMain(gn); - break; - } - } - } -} - -/*- - *--------------------------------------------------------------------- - * Parse_IsVar -- - * Return TRUE if the passed line is a variable assignment. A variable - * assignment consists of a single word followed by optional whitespace - * followed by either a += or an = operator. - * This function is used both by the Parse_File function and main when - * parsing the command-line arguments. - * - * Results: - * TRUE if it is. FALSE if it ain't - * - * Side Effects: - * none - *--------------------------------------------------------------------- - */ -Boolean -Parse_IsVar(char *line) -{ - Boolean wasSpace = FALSE; /* set TRUE if found a space */ - Boolean haveName = FALSE; /* Set TRUE if have a variable name */ - - int level = 0; -#define ISEQOPERATOR(c) \ - ((c) == '+' || (c) == ':' || (c) == '?' || (c) == '!') - - /* - * Skip to variable name - */ - for (; *line == ' ' || *line == '\t'; line++) - continue; - - for (; *line != '=' || level != 0; line++) { - switch (*line) { - case '\0': - /* - * end-of-line -- can't be a variable assignment. - */ - return (FALSE); - - case ' ': - case '\t': - /* - * there can be as much white space as desired so long - * as there is only one word before the operator - */ - wasSpace = TRUE; - break; - - case '(': - case '{': - level++; - break; - - case '}': - case ')': - level--; - break; - - default: - if (wasSpace && haveName) { - if (ISEQOPERATOR(*line)) { - /* - * We must have a finished word - */ - if (level != 0) - return (FALSE); - - /* - * When an = operator [+?!:] is found, - * the next character must be an = or - * it ain't a valid assignment. - */ - if (line[1] == '=') - return (haveName); -#ifdef SUNSHCMD - /* - * This is a shell command - */ - if (strncmp(line, ":sh", 3) == 0) - return (haveName); -#endif - } - /* - * This is the start of another word, so not - * assignment. - */ - return (FALSE); - - } else { - haveName = TRUE; - wasSpace = FALSE; - } - break; - } - } - - return (haveName); -} - -/*- - *--------------------------------------------------------------------- - * Parse_DoVar -- - * Take the variable assignment in the passed line and do it in the - * global context. - * - * Note: There is a lexical ambiguity with assignment modifier characters - * in variable names. This routine interprets the character before the = - * as a modifier. Therefore, an assignment like - * C++=/usr/bin/CC - * is interpreted as "C+ +=" instead of "C++ =". - * - * Results: - * none - * - * Side Effects: - * the variable structure of the given variable name is altered in the - * global context. - *--------------------------------------------------------------------- - */ -void -Parse_DoVar(char *line, GNode *ctxt) -{ - char *cp; /* pointer into line */ - enum { - VAR_SUBST, - VAR_APPEND, - VAR_SHELL, - VAR_NORMAL - } type; /* Type of assignment */ - char *opc; /* ptr to operator character to - * null-terminate the variable name */ - - /* - * Skip to variable name - */ - while (*line == ' ' || *line == '\t') { - line++; - } - - /* - * Skip to operator character, nulling out whitespace as we go - */ - for (cp = line + 1; *cp != '='; cp++) { - if (isspace((unsigned char)*cp)) { - *cp = '\0'; - } - } - opc = cp - 1; /* operator is the previous character */ - *cp++ = '\0'; /* nuke the = */ - - /* - * Check operator type - */ - switch (*opc) { - case '+': - type = VAR_APPEND; - *opc = '\0'; - break; - - case '?': - /* - * If the variable already has a value, we don't do anything. - */ - *opc = '\0'; - if (Var_Exists(line, ctxt)) { - return; - } else { - type = VAR_NORMAL; - } - break; - - case ':': - type = VAR_SUBST; - *opc = '\0'; - break; - - case '!': - type = VAR_SHELL; - *opc = '\0'; - break; - - default: -#ifdef SUNSHCMD - while (*opc != ':') { - if (opc == line) - break; - else - --opc; - } - - if (strncmp(opc, ":sh", 3) == 0) { - type = VAR_SHELL; - *opc = '\0'; - break; - } -#endif - type = VAR_NORMAL; - break; - } - - while (isspace((unsigned char)*cp)) { - cp++; - } - - if (type == VAR_APPEND) { - Var_Append(line, cp, ctxt); - - } else if (type == VAR_SUBST) { - /* - * Allow variables in the old value to be undefined, but leave - * their invocation alone -- this is done by forcing oldVars - * to be false. - * XXX: This can cause recursive variables, but that's not - * hard to do, and this allows someone to do something like - * - * CFLAGS = $(.INCLUDES) - * CFLAGS := -I.. $(CFLAGS) - * - * And not get an error. - */ - Boolean oldOldVars = oldVars; - - oldVars = FALSE; - - /* - * make sure that we set the variable the first time to nothing - * so that it gets substituted! - */ - if (!Var_Exists(line, ctxt)) - Var_Set(line, "", ctxt); - - cp = Buf_Peel(Var_Subst(cp, ctxt, FALSE)); - - oldVars = oldOldVars; - - Var_Set(line, cp, ctxt); - free(cp); - - } else if (type == VAR_SHELL) { - /* - * TRUE if the command needs to be freed, i.e. - * if any variable expansion was performed - */ - Boolean freeCmd = FALSE; - Buffer *buf; - const char *error; - - if (strchr(cp, '$') != NULL) { - /* - * There's a dollar sign in the command, so perform - * variable expansion on the whole thing. The - * resulting string will need freeing when we're done, - * so set freeCmd to TRUE. - */ - cp = Buf_Peel(Var_Subst(cp, VAR_CMD, TRUE)); - freeCmd = TRUE; - } - - buf = Cmd_Exec(cp, &error); - Var_Set(line, Buf_Data(buf), ctxt); - Buf_Destroy(buf, TRUE); - - if (error) - Parse_Error(PARSE_WARNING, error, cp); - - if (freeCmd) - free(cp); - - } else { - /* - * Normal assignment -- just do it. - */ - Var_Set(line, cp, ctxt); - } - if (strcmp(line, MAKE_JOB_PREFIX) == 0) - Job_SetPrefix(); -} - -/*- - *----------------------------------------------------------------------- - * ParseHasCommands -- - * Callback procedure for Parse_File when destroying the list of - * targets on the last dependency line. Marks a target as already - * having commands if it does, to keep from having shell commands - * on multiple dependency lines. - * - * Results: - * None - * - * Side Effects: - * OP_HAS_COMMANDS may be set for the target. - * - *----------------------------------------------------------------------- - */ -static void -ParseHasCommands(void *gnp) -{ - GNode *gn = gnp; - - if (!Lst_IsEmpty(&gn->commands)) { - gn->type |= OP_HAS_COMMANDS; - } -} - -/*- - *----------------------------------------------------------------------- - * Parse_AddIncludeDir -- - * Add a directory to the path searched for included makefiles - * bracketed by double-quotes. Used by functions in main.c - * - * Results: - * None. - * - * Side Effects: - * The directory is appended to the list. - * - *----------------------------------------------------------------------- - */ -void -Parse_AddIncludeDir(char *dir) -{ - - Path_AddDir(&parseIncPath, dir); -} - -/*- - *--------------------------------------------------------------------- - * Parse_FromString -- - * Start Parsing from the given string - * - * Results: - * None - * - * Side Effects: - * A structure is added to the includes Lst and readProc, curFile.lineno, - * curFile.fname and curFile.F are altered for the new file - *--------------------------------------------------------------------- - */ -void -Parse_FromString(char *str, int lineno) -{ - - DEBUGF(FOR, ("%s\n---- at line %d\n", str, lineno)); - - ParsePushInput(estrdup(CURFILE->fname), NULL, str, lineno); -} - -#ifdef SYSVINCLUDE -/*- - *--------------------------------------------------------------------- - * ParseTraditionalInclude -- - * Push to another file. - * - * The input is the line minus the "include". The file name is - * the string following the "include". - * - * Results: - * None - * - * Side Effects: - * A structure is added to the includes Lst and readProc, curFile.lineno, - * curFile.fname and curFile.F are altered for the new file - *--------------------------------------------------------------------- - */ -static void -ParseTraditionalInclude(char *file) -{ - char *fullname; /* full pathname of file */ - char *cp; /* current position in file spec */ - - /* - * Skip over whitespace - */ - while (*file == ' ' || *file == '\t') { - file++; - } - - if (*file == '\0') { - Parse_Error(PARSE_FATAL, "Filename missing from \"include\""); - return; - } - - /* - * Skip to end of line or next whitespace - */ - for (cp = file; *cp && *cp != '\n' && *cp != '\t' && *cp != ' '; cp++) { - continue; - } - - *cp = '\0'; - - /* - * Substitute for any variables in the file name before trying to - * find the thing. - */ - file = Buf_Peel(Var_Subst(file, VAR_CMD, FALSE)); - - /* - * Now we know the file's name, we attempt to find the durn thing. - * Search for it first on the -I search path, then on the .PATH - * search path, if not found in a -I directory. - */ - fullname = Path_FindFile(file, &parseIncPath); - if (fullname == NULL) { - fullname = Path_FindFile(file, &dirSearchPath); - } - - if (fullname == NULL) { - /* - * Still haven't found the makefile. Look for it on the system - * path as a last resort. - */ - fullname = Path_FindFile(file, &sysIncPath); - } - - if (fullname == NULL) { - Parse_Error(PARSE_FATAL, "Could not find %s", file); - /* XXXHB free(file) */ - return; - } - - /* XXXHB free(file) */ - - /* - * We set up the name of the file to be the absolute - * name of the include file so error messages refer to the right - * place. - */ - ParsePushInput(fullname, NULL, NULL, 0); -} -#endif - -/*- - *--------------------------------------------------------------------- - * ParseReadc -- - * Read a character from the current file - * - * Results: - * The character that was read - * - * Side Effects: - *--------------------------------------------------------------------- - */ -static int -ParseReadc(void) -{ - - if (CURFILE->F != NULL) - return (fgetc(CURFILE->F)); - - if (CURFILE->str != NULL && *CURFILE->ptr != '\0') - return (*CURFILE->ptr++); - - return (EOF); -} - - -/*- - *--------------------------------------------------------------------- - * ParseUnreadc -- - * Put back a character to the current file - * - * Results: - * None. - * - * Side Effects: - *--------------------------------------------------------------------- - */ -static void -ParseUnreadc(int c) -{ - - if (CURFILE->F != NULL) { - ungetc(c, CURFILE->F); - return; - } - if (CURFILE->str != NULL) { - *--(CURFILE->ptr) = c; - return; - } -} - -/* ParseSkipLine(): - * Grab the next line unless it begins with a dot (`.') and we're told to - * ignore such lines. - */ -static char * -ParseSkipLine(int skip, int keep_newline) -{ - char *line; - int c, lastc; - Buffer *buf; - - buf = Buf_Init(MAKE_BSIZE); - - do { - Buf_Clear(buf); - lastc = '\0'; - - while (((c = ParseReadc()) != '\n' || lastc == '\\') - && c != EOF) { - if (skip && c == '#' && lastc != '\\') { - /* - * let a comment be terminated even by an - * escaped \n. This is consistent to comment - * handling in ParseReadLine - */ - while ((c = ParseReadc()) != '\n' && c != EOF) - ; - break; - } - if (c == '\n') { - if (keep_newline) - Buf_AddByte(buf, (Byte)c); - else - Buf_ReplaceLastByte(buf, (Byte)' '); - CURFILE->lineno++; - - while ((c = ParseReadc()) == ' ' || c == '\t') - continue; - - if (c == EOF) - break; - } - - Buf_AddByte(buf, (Byte)c); - lastc = c; - } - - if (c == EOF) { - Parse_Error(PARSE_FATAL, - "Unclosed conditional/for loop"); - Buf_Destroy(buf, TRUE); - return (NULL); - } - - CURFILE->lineno++; - Buf_AddByte(buf, (Byte)'\0'); - line = Buf_Data(buf); - } while (skip == 1 && line[0] != '.'); - - Buf_Destroy(buf, FALSE); - return (line); -} - -/*- - *--------------------------------------------------------------------- - * ParseReadLine -- - * Read an entire line from the input file. Called only by Parse_File. - * To facilitate escaped newlines and what have you, a character is - * buffered in 'lastc', which is '\0' when no characters have been - * read. When we break out of the loop, c holds the terminating - * character and lastc holds a character that should be added to - * the line (unless we don't read anything but a terminator). - * - * Results: - * A line w/o its newline - * - * Side Effects: - * Only those associated with reading a character - *--------------------------------------------------------------------- - */ -static char * -ParseReadLine(void) -{ - Buffer *buf; /* Buffer for current line */ - int c; /* the current character */ - int lastc; /* The most-recent character */ - Boolean semiNL; /* treat semi-colons as newlines */ - Boolean ignDepOp; /* TRUE if should ignore dependency operators - * for the purposes of setting semiNL */ - Boolean ignComment; /* TRUE if should ignore comments (in a - * shell command */ - char *line; /* Result */ - char *ep; /* to strip trailing blanks */ - - again: - semiNL = FALSE; - ignDepOp = FALSE; - ignComment = FALSE; - - lastc = '\0'; - - /* - * Handle tab at the beginning of the line. A leading tab (shell - * command) forces us to ignore comments and dependency operators and - * treat semi-colons as semi-colons (by leaving semiNL FALSE). - * This also discards completely blank lines. - */ - for (;;) { - c = ParseReadc(); - if (c == EOF) { - if (ParsePopInput() == DONE) { - /* End of all inputs - return NULL */ - return (NULL); - } - continue; - } - - if (c == '\t') { - ignComment = ignDepOp = TRUE; - lastc = c; - break; - } - if (c != '\n') { - ParseUnreadc(c); - break; - } - CURFILE->lineno++; - } - - buf = Buf_Init(MAKE_BSIZE); - - while (((c = ParseReadc()) != '\n' || lastc == '\\') && c != EOF) { - test_char: - switch (c) { - case '\n': - /* - * Escaped newline: read characters until a - * non-space or an unescaped newline and - * replace them all by a single space. This is - * done by storing the space over the backslash - * and dropping through with the next nonspace. - * If it is a semi-colon and semiNL is TRUE, - * it will be recognized as a newline in the - * code below this... - */ - CURFILE->lineno++; - lastc = ' '; - while ((c = ParseReadc()) == ' ' || c == '\t') { - continue; - } - if (c == EOF || c == '\n') { - goto line_read; - } else { - /* - * Check for comments, semiNL's, etc. -- - * easier than ParseUnreadc(c); - * continue; - */ - goto test_char; - } - /*NOTREACHED*/ - break; - - case ';': - /* - * Semi-colon: Need to see if it should be - * interpreted as a newline - */ - if (semiNL) { - /* - * To make sure the command that may - * be following this semi-colon begins - * with a tab, we push one back into the - * input stream. This will overwrite the - * semi-colon in the buffer. If there is - * no command following, this does no - * harm, since the newline remains in - * the buffer and the - * whole line is ignored. - */ - ParseUnreadc('\t'); - goto line_read; - } - break; - case '=': - if (!semiNL) { - /* - * Haven't seen a dependency operator - * before this, so this must be a - * variable assignment -- don't pay - * attention to dependency operators - * after this. - */ - ignDepOp = TRUE; - } else if (lastc == ':' || lastc == '!') { - /* - * Well, we've seen a dependency - * operator already, but it was the - * previous character, so this is really - * just an expanded variable assignment. - * Revert semi-colons to being just - * semi-colons again and ignore any more - * dependency operators. - * - * XXX: Note that a line like - * "foo : a:=b" will blow up, but who'd - * write a line like that anyway? - */ - ignDepOp = TRUE; - semiNL = FALSE; - } - break; - case '#': - if (!ignComment) { - if (lastc != '\\') { - /* - * If the character is a hash - * mark and it isn't escaped - * (or we're being compatible), - * the thing is a comment. - * Skip to the end of the line. - */ - do { - c = ParseReadc(); - } while (c != '\n' && c != EOF); - goto line_read; - } else { - /* - * Don't add the backslash. - * Just let the # get copied - * over. - */ - lastc = c; - continue; - } - } - break; - - case ':': - case '!': - if (!ignDepOp) { - /* - * A semi-colon is recognized as a - * newline only on dependency lines. - * Dependency lines are lines with a - * colon or an exclamation point. - * Ergo... - */ - semiNL = TRUE; - } - break; - - default: - break; - } - /* - * Copy in the previous character (there may be none if this - * was the first character) and save this one in - * lastc. - */ - if (lastc != '\0') - Buf_AddByte(buf, (Byte)lastc); - lastc = c; - } - line_read: - CURFILE->lineno++; - - if (lastc != '\0') { - Buf_AddByte(buf, (Byte)lastc); - } - Buf_AddByte(buf, (Byte)'\0'); - line = Buf_Peel(buf); - - /* - * Strip trailing blanks and tabs from the line. - * Do not strip a blank or tab that is preceded by - * a '\' - */ - ep = line; - while (*ep) - ++ep; - while (ep > line + 1 && (ep[-1] == ' ' || ep[-1] == '\t')) { - if (ep > line + 1 && ep[-2] == '\\') - break; - --ep; - } - *ep = 0; - - if (line[0] == '\0') { - /* empty line - just ignore */ - free(line); - goto again; - } - - return (line); -} - -/*- - *----------------------------------------------------------------------- - * ParseFinishLine -- - * Handle the end of a dependency group. - * - * Results: - * Nothing. - * - * Side Effects: - * inLine set FALSE. 'targets' list destroyed. - * - *----------------------------------------------------------------------- - */ -static void -ParseFinishLine(void) -{ - const LstNode *ln; - - if (inLine) { - LST_FOREACH(ln, &targets) { - if (((const GNode *)Lst_Datum(ln))->type & OP_TRANSFORM) - Suff_EndTransform(Lst_Datum(ln)); - } - Lst_Destroy(&targets, ParseHasCommands); - inLine = FALSE; - } -} - -/** - * xparse_include - * Parse an .include directive and push the file onto the input stack. - * The input is the line minus the .include. A file spec is a string - * enclosed in <> or "". The former is looked for only in sysIncPath. - * The latter in . and the directories specified by -I command line - * options - */ -static void -xparse_include(char *file, int sinclude) -{ - char *fullname; /* full pathname of file */ - char endc; /* the character which ends the file spec */ - char *cp; /* current position in file spec */ - Boolean isSystem; /* TRUE if makefile is a system makefile */ - char *prefEnd, *Fname; - char *newName; - - /* - * Skip to delimiter character so we know where to look - */ - while (*file == ' ' || *file == '\t') { - file++; - } - - if (*file != '"' && *file != '<') { - Parse_Error(PARSE_FATAL, - ".include filename must be delimited by '\"' or '<'"); - return; - } - - /* - * Set the search path on which to find the include file based on the - * characters which bracket its name. Angle-brackets imply it's - * a system Makefile while double-quotes imply it's a user makefile - */ - if (*file == '<') { - isSystem = TRUE; - endc = '>'; - } else { - isSystem = FALSE; - endc = '"'; - } - - /* - * Skip to matching delimiter - */ - for (cp = ++file; *cp != endc; cp++) { - if (*cp == '\0') { - Parse_Error(PARSE_FATAL, - "Unclosed .include filename. '%c' expected", endc); - return; - } - } - *cp = '\0'; - - /* - * Substitute for any variables in the file name before trying to - * find the thing. - */ - file = Buf_Peel(Var_Subst(file, VAR_CMD, FALSE)); - - /* - * Now we know the file's name and its search path, we attempt to - * find the durn thing. A return of NULL indicates the file don't - * exist. - */ - if (!isSystem) { - /* - * Include files contained in double-quotes are first searched - * for relative to the including file's location. We don't want - * to cd there, of course, so we just tack on the old file's - * leading path components and call Path_FindFile to see if - * we can locate the beast. - */ - - /* Make a temporary copy of this, to be safe. */ - Fname = estrdup(CURFILE->fname); - - prefEnd = strrchr(Fname, '/'); - if (prefEnd != NULL) { - *prefEnd = '\0'; - if (file[0] == '/') - newName = estrdup(file); - else - newName = str_concat(Fname, file, STR_ADDSLASH); - fullname = Path_FindFile(newName, &parseIncPath); - if (fullname == NULL) { - fullname = Path_FindFile(newName, - &dirSearchPath); - } - free(newName); - *prefEnd = '/'; - } else { - fullname = NULL; - } - free(Fname); - if (fullname == NULL) { - /* - * Makefile wasn't found in same directory as included - * makefile. Search for it first on the -I search path, - * then on the .PATH search path, if not found in a -I - * directory. - * XXX: Suffix specific? - */ - fullname = Path_FindFile(file, &parseIncPath); - if (fullname == NULL) { - fullname = Path_FindFile(file, &dirSearchPath); - } - } - } else { - fullname = NULL; - } - - if (fullname == NULL) { - /* - * System makefile or still haven't found the makefile. - * Look for it on the system path. - */ - fullname = Path_FindFile(file, &sysIncPath); - } - - if (fullname == NULL) { - *cp = endc; - if (!sinclude) - Parse_Error(PARSE_FATAL, "Could not find %s", file); - else - Main_AddSourceMakefile(file); - free(file); - return; - } - Main_AddSourceMakefile(fullname); - free(file); - - /* - * We set up the name of the file to be the absolute - * name of the include file so error messages refer to the right - * place. - */ - ParsePushInput(fullname, NULL, NULL, 0); - DEBUGF(DIR, (".include %s\n", fullname)); -} - -static void -parse_include(char *file, int code __unused, int lineno __unused) -{ - xparse_include(file, 0); -} - -static void -parse_sinclude(char *file, int code __unused, int lineno __unused) -{ - xparse_include(file, 1); -} - -/** - * parse_message - * Parse a .warning or .error directive - * - * The input is the line minus the ".error"/".warning". We substitute - * variables, print the message and exit(1) (for .error) or just print - * a warning if the directive is malformed. - */ -static void -parse_message(char *line, int iserror, int lineno __unused) -{ - - if (!isspace((u_char)*line)) { - Parse_Error(PARSE_WARNING, "invalid syntax: .%s%s", - iserror ? "error" : "warning", line); - return; - } - - while (isspace((u_char)*line)) - line++; - - line = Buf_Peel(Var_Subst(line, VAR_CMD, FALSE)); - Parse_Error(iserror ? PARSE_FATAL : PARSE_WARNING, "%s", line); - free(line); - - if (iserror) { - /* Terminate immediately. */ - exit(1); - } -} - -/** - * parse_undef - * Parse an .undef directive. - */ -static void -parse_undef(char *line, int code __unused, int lineno __unused) -{ - char *cp; - - while (isspace((u_char)*line)) - line++; - - for (cp = line; !isspace((u_char)*cp) && *cp != '\0'; cp++) { - ; - } - *cp = '\0'; - - cp = Buf_Peel(Var_Subst(line, VAR_CMD, FALSE)); - Var_Delete(cp, VAR_GLOBAL); - free(cp); -} - -/** - * parse_for - * Parse a .for directive. - */ -static void -parse_for(char *line, int code __unused, int lineno) -{ - - if (!For_For(line)) { - /* syntax error */ - return; - } - line = NULL; - - /* - * Skip after the matching endfor. - */ - do { - free(line); - line = ParseSkipLine(0, 1); - if (line == NULL) { - Parse_Error(PARSE_FATAL, - "Unexpected end of file in for loop.\n"); - return; - } - } while (For_Eval(line)); - free(line); - - /* execute */ - For_Run(lineno); -} - -/** - * parse_endfor - * Parse endfor. This may only happen if there was no matching .for. - */ -static void -parse_endfor(char *line __unused, int code __unused, int lineno __unused) -{ - - Parse_Error(PARSE_FATAL, "for-less endfor"); -} - -/** - * parse_directive - * Got a line starting with a '.'. Check if this is a directive - * and parse it. - * - * return: - * TRUE if line was a directive, FALSE otherwise. - */ -static Boolean -parse_directive(char *line) -{ - char *start; - char *cp; - int dir; - - /* - * Get the keyword: - * .[[:space:]]*\([[:alpha:]][[:alnum:]_]*\).* - * \1 is the keyword. - */ - for (start = line; isspace((u_char)*start); start++) { - ; - } - - if (!isalpha((u_char)*start)) { - return (FALSE); - } - - cp = start + 1; - while (isalnum((u_char)*cp) || *cp == '_') { - cp++; - } - - dir = directive_hash(start, cp - start); - if (dir < 0 || dir >= (int)NDIRECTS || - (size_t)(cp - start) != strlen(directives[dir].name) || - strncmp(start, directives[dir].name, cp - start) != 0) { - /* not actually matched */ - return (FALSE); - } - - if (!skipLine || directives[dir].skip_flag) - (*directives[dir].func)(cp, directives[dir].code, - CURFILE->lineno); - return (TRUE); -} - -/*- - *--------------------------------------------------------------------- - * Parse_File -- - * Parse a file into its component parts, incorporating it into the - * current dependency graph. This is the main function and controls - * almost every other function in this module - * - * Results: - * None - * - * Side Effects: - * Loads. Nodes are added to the list of all targets, nodes and links - * are added to the dependency graph. etc. etc. etc. - *--------------------------------------------------------------------- - */ -void -Parse_File(const char *name, FILE *stream) -{ - char *cp; /* pointer into the line */ - char *line; /* the line we're working on */ - - inLine = FALSE; - fatals = 0; - - ParsePushInput(estrdup(name), stream, NULL, 0); - - while ((line = ParseReadLine()) != NULL) { - if (*line == '.' && parse_directive(line + 1)) { - /* directive consumed */ - goto nextLine; - } - if (skipLine || *line == '#') { - /* Skipping .if block or comment. */ - goto nextLine; - } - - if (*line == '\t') { - /* - * If a line starts with a tab, it can only - * hope to be a creation command. - */ - for (cp = line + 1; isspace((unsigned char)*cp); cp++) { - continue; - } - if (*cp) { - if (inLine) { - LstNode *ln; - GNode *gn; - - /* - * So long as it's not a blank - * line and we're actually in a - * dependency spec, add the - * command to the list of - * commands of all targets in - * the dependency spec. - */ - LST_FOREACH(ln, &targets) { - gn = Lst_Datum(ln); - - /* - * if target already - * supplied, ignore - * commands - */ - if (!(gn->type & OP_HAS_COMMANDS)) - Lst_AtEnd(&gn->commands, cp); - else - Parse_Error(PARSE_WARNING, "duplicate script " - "for target \"%s\" ignored", gn->name); - } - continue; - } else { - Parse_Error(PARSE_FATAL, - "Unassociated shell command \"%s\"", - cp); - } - } -#ifdef SYSVINCLUDE - } else if (strncmp(line, "include", 7) == 0 && - isspace((unsigned char)line[7]) && - strchr(line, ':') == NULL) { - /* - * It's an S3/S5-style "include". - */ - ParseTraditionalInclude(line + 7); - goto nextLine; -#endif - } else if (Parse_IsVar(line)) { - ParseFinishLine(); - Parse_DoVar(line, VAR_GLOBAL); - - } else { - /* - * We now know it's a dependency line so it - * needs to have all variables expanded before - * being parsed. Tell the variable module to - * complain if some variable is undefined... - * To make life easier on novices, if the line - * is indented we first make sure the line has - * a dependency operator in it. If it doesn't - * have an operator and we're in a dependency - * line's script, we assume it's actually a - * shell command and add it to the current - * list of targets. XXX this comment seems wrong. - */ - cp = line; - if (isspace((unsigned char)line[0])) { - while (*cp != '\0' && - isspace((unsigned char)*cp)) { - cp++; - } - if (*cp == '\0') { - goto nextLine; - } - } - - ParseFinishLine(); - - cp = Buf_Peel(Var_Subst(line, VAR_CMD, TRUE)); - - free(line); - line = cp; - - /* - * Need a non-circular list for the target nodes - */ - Lst_Destroy(&targets, NOFREE); - inLine = TRUE; - - ParseDoDependency(line); - } - - nextLine: - free(line); - } - - ParseFinishLine(); - - /* - * Make sure conditionals are clean - */ - Cond_End(); - - if (fatals) - errx(1, "fatal errors encountered -- cannot continue"); -} - -/*- - *----------------------------------------------------------------------- - * Parse_MainName -- - * Return a Lst of the main target to create for main()'s sake. If - * no such target exists, we Punt with an obnoxious error message. - * - * Results: - * A Lst of the single node to create. - * - * Side Effects: - * None. - * - *----------------------------------------------------------------------- - */ -void -Parse_MainName(Lst *listmain) -{ - - if (mainNode == NULL) { - Punt("no target to make."); - /*NOTREACHED*/ - } else if (mainNode->type & OP_DOUBLEDEP) { - Lst_AtEnd(listmain, mainNode); - Lst_Concat(listmain, &mainNode->cohorts, LST_CONCNEW); - } else - Lst_AtEnd(listmain, mainNode); -} |
