/* * COMPONENT_NAME: BLDPROCESS * * FUNCTIONS: ParseAddCmd * ParseAddDir * ParseAddDirs * ParseBlankLines * ParseClearPath * ParseDoDependency * ParseDoInclude * ParseDoOp * ParseDoSources * ParseDoSrc * ParseDoVar * ParseEOF * ParseErrorCond * ParseFindKeyword * ParseFindMain * ParseFinishLine * ParseHasCommands1546 * ParseLinkSrc * ParseReadLine * ParseReadc * ParseVarOrDep * Parse_AddIncludeDir1569 * Parse_DoVar * Parse_Error * Parse_File * Parse_Init * Parse_MainName * * ORIGINS: 27,71 * * This module contains IBM CONFIDENTIAL code. -- (IBM * Confidential Restricted when combined with the aggregated * modules for this product) * SOURCE MATERIALS * * (C) COPYRIGHT International Business Machines Corp. 1994 * All Rights Reserved * US Government Users Restricted Rights - Use, duplication or * disclosure restricted by GSA ADP Schedule Contract with IBM Corp. */ /* * @OSF_FREE_COPYRIGHT@ * COPYRIGHT NOTICE * Copyright (c) 1992, 1991, 1990 * Open Software Foundation, Inc. * * Permission is hereby granted to use, copy, modify and freely distribute * the software in this file and its documentation for any purpose without * fee, provided that the above copyright notice appears in all copies and * that both the copyright notice and this permission notice appear in * supporting documentation. Further, provided that the name of Open * Software Foundation, Inc. ("OSF") not be used in advertising or * publicity pertaining to distribution of the software without prior * written permission from OSF. OSF makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. */ /* * HISTORY * $Log: parse.c,v $ * Revision 1.2.5.5 1992/12/03 19:07:09 damon * ODE 2.2 CR 346. Expanded copyright * [1992/12/03 18:36:25 damon] * * Revision 1.2.5.4 1992/11/09 21:50:30 damon * CR 296. Cleaned up to remove warnings * [1992/11/09 21:49:20 damon] * * Revision 1.2.5.3 1992/09/24 19:26:57 gm * CR286: Major improvements to make internals. * [1992/09/24 17:55:25 gm] * * Revision 1.2.5.2 1992/06/24 16:31:45 damon * CR 181. Changed vfork to fork * [1992/06/24 16:19:35 damon] * * Revision 1.2 1991/12/05 20:44:42 devrcs * Changes for parallel make. * [91/04/21 16:38:34 gm] * * Changes for Reno make * [91/03/22 16:08:14 mckeen] * * $EndLog$ */ /* * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. * Copyright (c) 1988, 1989 by Adam de Boor * 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 are permitted provided * that: (1) source distributions retain this entire copyright notice and * comment, and (2) distributions including binaries display the following * acknowledgement: ``This product includes software developed by the * University of California, Berkeley and its contributors'' in the * documentation or other materials provided with the distribution and in * all advertising materials mentioning features or use of this software. * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ #ifndef lint static char sccsid[] = "@(#)49 1.4 src/bldenv/make/parse.c, bldprocess, bos412, GOLDA411a 1/19/94 16:31:15"; #endif /* not lint */ #ifndef lint static char rcsid[] = "@(#)parse.c 5.18 (Berkeley) 2/19/91"; #endif /* not lint */ /*- * parse.c -- * Functions to parse a makefile. * * One function, Parse_Init, must be called before any functions * in this module are used. After that, the function Parse_File is the * main entry point and controls most of the other functions in this * module. * * Most important structures are kept in Lsts. Directories for * the #include "..." function are kept in the 'dirSearchPath' Lst, while * those for the #include <...> are kept in the 'parseIncPath' and * 'sysIncPath' Lst's. The targets currently being defined are kept * in the 'targets' Lst. * * The variables 'fname' and 'lineno' are used to track the name * of the current file and the line number in that file so that error * messages can be more meaningful. * * Interface: * Parse_Init Initialization function which must be * called before anything else in this module * is used. * * 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_DoVar Returns zero 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 #include #include #include #include #include #include #include "make.h" #include "buf.h" #include "hash.h" #include "pathnames.h" /* * These values are returned by ParseEOF 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 static int ParseEOF(int); static Lst targets; /* targets we're working on */ static Boolean inLine; /* true if currently in a dependency * line or its commands */ string_t fname; /* name of current file (for errors) */ static int lineno; /* line number in current file */ static FILE *curFILE; /* current makefile */ static Buffer lookaheadBuf; static Boolean haveLookahead = FALSE; static int makeincludecompat; static int fatals = 0; static GNode *mainNode; /* The main target to create. This is the * first target on the first dependency * line in the first makefile */ /* * Definitions for handling #include specifications */ typedef struct IFile { string_t fname; /* name of previous file */ int lineno; /* saved line number */ FILE * F; /* the open stream */ } IFile; static Lst includes; /* stack of IFiles generated by * #includes */ Lst parseIncPath; /* list of directories for <...> includes */ Lst sysIncPath; /* list of directories for <...> includes */ Lst specPaths; /* special paths */ /*- * 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 { Default, /* .DEFAULT */ Ignore, /* .IGNORE */ Includes, /* .INCLUDES */ Libs, /* .LIBS */ MFlags, /* .MFLAGS or .MAKEFLAGS */ Main, /* .MAIN and we don't have anything user-specified to * make */ Not, /* Not special */ NotMain, /* .BEGIN, .END, .INTERRUPT, .ERROR or .EXIT */ NotParallel, /* .NOTPARALLEL */ Null, /* .NULL */ Order, /* .ORDER */ Path, /* .PATH */ Precious, /* .PRECIOUS */ Silent, /* .SILENT */ Suffixes, /* .SUFFIXES */ Attribute /* Generic attribute */ } ParseSpecial; ParseSpecial specType; /* * Predecessor node for handling .ORDER. Initialized to NILGNODE 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 struct { const char *name; /* Name of keyword */ ParseSpecial spec; /* Type when used as a target */ int op; /* Operator when used as a source */ } parseKeywords[] = { { ".BEGIN", NotMain, 0 }, { ".DEFAULT", Default, 0 }, { ".OPTIONAL", Attribute, OP_OPTIONAL }, { ".END", NotMain, 0 }, { ".ERROR", NotMain, 0 }, { ".EXIT", NotMain, 0 }, { ".EXEC", Attribute, OP_EXEC }, { ".IGNORE", Ignore, OP_IGNORE }, { ".INCLUDES", Includes, 0 }, { ".INTERRUPT", NotMain, 0 }, { ".INVISIBLE", Attribute, OP_INVISIBLE }, { ".JOIN", Attribute, OP_JOIN }, { ".LIBS", Libs, 0 }, { ".LINKS", Attribute, OP_LINK }, { ".MAIN", Main, 0 }, { ".MAKE", Attribute, OP_MAKE }, { ".MAKEFLAGS", MFlags, 0 }, { ".MFLAGS", MFlags, 0 }, { ".NOTMAIN", Attribute, OP_NOTMAIN }, { ".NOTPARALLEL", NotParallel, 0 }, { ".NULL", Null, 0 }, { ".ORDER", Order, 0 }, { ".PATH", Path, 0 }, { ".PRECIOUS", Precious, OP_PRECIOUS }, { ".RECURSIVE", Attribute, OP_MAKE }, { ".SILENT", Silent, OP_SILENT }, { ".SUFFIXES", Suffixes, 0 }, { ".USE", Attribute, OP_USE }, }; int specOp; char parseMeta[UCHAR_MAX+1]; /*- *---------------------------------------------------------------------- * ParseFindKeyword -- * Look in the table of keywords for one matching the given string. * * Results: * The index of the keyword, or -1 if it isn't there. * * Side Effects: * None *---------------------------------------------------------------------- */ static int ParseFindKeyword (const char *str) /* String to find */ { register int start, end, cur; register int diff; start = 0; end = (sizeof(parseKeywords)/sizeof(parseKeywords[0])) - 1; do { cur = start + ((end - start) / 2); diff = strcmp (str, parseKeywords[cur].name); if (diff == 0) { return (cur); } else if (diff < 0) { end = cur - 1; } else { start = cur + 1; } } while (start <= end); return (-1); } /*- * 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, ...) /* Error type (PARSE_WARNING, PARSE_FATAL) */ { va_list ap; (void)fflush(stdout); (void)fprintf(stderr, "\"%s\", line %d: ", fname->data, lineno); if (type == PARSE_WARNING) (void)fprintf(stderr, "warning: "); va_start(ap, fmt); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); if (type == PARSE_FATAL) fatals += 1; } /*- *--------------------------------------------------------------------- * ParseLinkSrc -- * Link the parent node to its new child. Used in a Lst_ForEach by * ParseDoDependency. If the specType isn't 'Not', the parent * isn't linked as a parent of the child. * * Results: * Always = 0 * * Side Effects: * New elements are added to the parents list of cgn and the * children list of cgn. the unmade field of pgn is updated * to reflect the additional child. *--------------------------------------------------------------------- */ static int ParseLinkSrc ( ClientData pgnCD, /* The parent node */ ClientData cgnCD) /* The child node */ { GNode *pgn = (GNode *)pgnCD; GNode *cgn = (GNode *)cgnCD; Boolean new; if (Lst_Length(pgn->children)) { (void) Hash_CreateEntry(&pgn->childHT, cgn->name, &new); if (!new) return(0); } (void)Lst_AtEnd (pgn->children, (ClientData)cgn); if (specType == Not) (void)Lst_AtEnd (cgn->parents, (ClientData)pgn); pgn->unmade += 1; return (0); } /*- *--------------------------------------------------------------------- * ParseDoOp -- * Apply the parsed operator to the given target node. Used in a * Lst_ForEach call by ParseDoDependency once all targets have * been found and their operator parsed. If the previous and new * operators are incompatible, a major error is taken. * * Results: * Always 0 * * Side Effects: * The type field of the node is altered to reflect any new bits in * the op. *--------------------------------------------------------------------- */ static int ParseDoOp ( ClientData gnCD, /* The node to which the operator is to be * applied */ ClientData opCD) /* The operator to apply */ { GNode *gn = (GNode *)gnCD; int op = (int) opCD; /* * 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 (1); } 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. */ register GNode *cohort; LstNode ln; 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. */ Lst_ForEach(gn->parents, ParseLinkSrc, (ClientData)cohort); cohort->type = OP_DOUBLEDEP|OP_INVISIBLE; (void)Lst_AtEnd(gn->cohorts, (ClientData)cohort); /* * Replace the node in the targets list with the new copy */ ln = Lst_Member(targets, (ClientData)gn); Lst_Replace(ln, (ClientData)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; return (0); } /*- *--------------------------------------------------------------------- * 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 ( string_t src) /* name of the source to handle */ { int tOp; /* operator (if any) from special targets */ int op; /* operator (if any) from special source */ GNode *gn; tOp = specOp; op = 0; if (*src->data == '.' && isupper (src->data[1])) { int keywd = ParseFindKeyword(src->data); if (keywd != -1) { op = parseKeywords[keywd].op; } if (op != 0) { Lst_ForEach (targets, ParseDoOp, (ClientData)op); return; } } if (specType == 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... */ (void) Lst_AtEnd (create, (ClientData)string_ref(src)); /* * Add the name to the .TARGETS variable as well, so the user can * employ that, if desired. */ Var_Append(s_TARGETS, src, VAR_GLOBAL); return; } gn = Targ_FindNode(src, TARG_CREATE); if (specType == Order) { /* * Create proper predecessor/successor links between the previous * source and the current one. */ if (predecessor != NILGNODE) { (void)Lst_AtEnd(predecessor->successors, (ClientData)gn); (void)Lst_AtEnd(gn->preds, (ClientData)predecessor); } /* * The current source now becomes the predecessor for the next one. */ predecessor = gn; return; } /* * 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. */ if (tOp) { gn->type |= tOp; } else { Lst_ForEach (targets, ParseLinkSrc, (ClientData)gn); } if ((gn->type & OP_OPMASK) == OP_DOUBLEDEP) { register GNode *cohort; register LstNode ln; for (ln=Lst_First(gn->cohorts); ln != NILLNODE; ln = Lst_Succ(ln)){ cohort = (GNode *)Lst_Datum(ln); if (tOp) { cohort->type |= tOp; } else { Lst_ForEach(targets, ParseLinkSrc, (ClientData)cohort); } } } } /*- *----------------------------------------------------------------------- * ParseFindMain -- * Find a real target in the list and set it to be the main one. * Called by ParseDoDependency when a main target hasn't been found * yet. * * Results: * 0 if main not found yet, 1 if it is. * * Side Effects: * mainNode is changed and Targ_SetMain is called. * *----------------------------------------------------------------------- */ static int ParseFindMain(ClientData gnCD, ClientData unused) { GNode *gn = (GNode *)gnCD; /* Node to examine */ if ((gn->type & (OP_NOTMAIN|OP_USE|OP_EXEC|OP_TRANSFORM)) == 0) { mainNode = gn; Targ_SetMain(gn); return (1); } else { return (0); } } /*- *----------------------------------------------------------------------- * ParseAddDir -- * Front-end for Dir_AddDir to make sure Lst_ForEach keeps going * * Results: * === 0 * * Side Effects: * See Dir_AddDir. * *----------------------------------------------------------------------- */ static int ParseAddDir(ClientData path, ClientData name) { Dir_AddDir((Lst)path, (string_t)name); return(0); } static void ParseAddDirs(string_t name) { Lst_ForEach(specPaths, ParseAddDir, (ClientData)name); } /*- *----------------------------------------------------------------------- * ParseClearPath -- * Front-end for Dir_ClearPath to make sure Lst_ForEach keeps going * * Results: * === 0 * * Side Effects: * See Dir_ClearPath * *----------------------------------------------------------------------- */ static int ParseClearPath(ClientData path, ClientData unused) { Dir_ClearPath((Lst)path); return(0); } /*- *--------------------------------------------------------------------- * 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 ParseDoSources( Buffer buf, char *dependents, Boolean doArch, void (*func)(string_t)) { char *line; /* our current target/dependent */ register char *cp; /* our current position */ register int c; /* a place to save a character */ string_t sline; /* * Expand the sources - reuse targets buffer, we are done with it... */ Buf_Discard(buf, Buf_Size(buf)); cp = dependents; for (;;) { for (;;) { if (!parseMeta[*(unsigned char *)cp]) { Buf_AddByte(buf, (Byte) *cp++); continue; } if (*cp == '\0') goto out; if (*cp == ' ' || *cp == '\t') break; if (*cp == '$') { char *result; int length; Boolean freeIt; result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); if (result == var_Error && !oldVars) { Parse_Error(PARSE_FATAL, "Bad imbedded variable"); return; } Buf_AddBytes(buf, strlen(result), (Byte *)result); if (freeIt) free(result); cp += length; continue; } if (*cp == ';') { char *cp2 = cp; *cp2++ = '\0'; while (*cp2 == ' ' || *cp2 == '\t') cp2++; if (*cp2 == '\0') break; Buf_AddBytes(lookaheadBuf, strlen(cp2), (Byte *) cp2); haveLookahead = TRUE; goto out; } Buf_AddByte(buf, (Byte) *cp++); } cp++; while (*cp == ' ' || *cp == '\t') cp++; if (*cp == '\0') break; Buf_AddByte(buf, (Byte) ' '); } out: /* * Get to the first source */ cp = (char *) Buf_GetBase(buf); while (*cp == ' ' || *cp == '\t') cp++; if (DEBUG(SUFF)) { printf("ParseDoDependency: dependents %s\n", 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 (*cp == '\0') { switch (specType) { case Suffixes: Suff_ClearSuffixes (); break; case Precious: allPrecious = TRUE; break; case Ignore: ignoreErrors = TRUE; break; case Silent: beSilent = TRUE; break; case NotParallel: { extern int maxJobs; maxJobs = 1; break; } case Path: if (specPaths == (Lst)NULL) break; Lst_ForEach(specPaths, ParseClearPath, (ClientData)NULL); Lst_Destroy(specPaths, NOFREE); break; default: break; } return; } /* * Handle sources that are not dependents */ 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 (cp); return; } if (specType == NotParallel) { extern int maxJobs; /* * Need to think of adding support for marking individual nodes * not parallel... */ maxJobs = 1; return; } /* * NOW GO FOR THE SOURCES */ /* * 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. */ for (;;) { line = cp; for (;;) { if (!parseMeta[c = *(unsigned char *)cp]) { cp++; continue; } if (c == '\0' || c == ' ' || c == '\t') break; if (doArch && c == LPAREN) { Lst sources = Lst_Init (); if (Arch_ParseArchive (&line, sources, VAR_CMD) != SUCCESS) { Parse_Error (PARSE_FATAL, "Error in source archive spec \"%s\"", line); return; } while (!Lst_IsEmpty (sources)) { GNode *gn = (GNode *) Lst_DeQueue (sources); ParseDoSrc (gn->name); } Lst_Destroy (sources, NOFREE); while (*line == ' ' || *line == '\t') line++; if (*line == '\0') return; cp = line; continue; } if (c != '$') { cp++; continue; } /* * 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. */ cp = Var_Skip(cp, VAR_CMD, TRUE); } *cp = '\0'; sline = string_create(line); (*func)(sline); string_deref(sline); if (c == '\0') return; cp++; while (*cp == ' ' || *cp == '\t') cp++; if (*cp == '\0') return; } } static void ParseDoDependency ( Buffer buf, /* targets buffer - reused for dependents*/ int modifier, /* modifier for targets */ char *dependents) /* dependents */ { char *targs; /* targets */ char *line; /* our current target/dependent */ register char *cp; /* our current position */ register GNode *gn; /* a general purpose temporary node */ register int op; /* the operator on the line */ register int c; /* a place to save a character */ Lst paths; /* List of search paths to alter when parsing * a list of .PATH targets */ string_t sline; targs = (char *) Buf_GetBase (buf); specType = Not; specOp = 0; paths = (Lst)NULL; line = targs; if (DEBUG(SUFF)) { printf("ParseDoDependency: targets %s\n", line); } while (*line) { cp = line; for (;;) { if (!parseMeta[c = *(unsigned char *)cp]) { cp++; continue; } if (c == '\0' || c == ' ' || c == '\t') break; if (c == LPAREN) { /* * 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 SUCCESS * if all went well and FAILURE if there was an error in * the specification. On error, line should remain untouched. */ if (Arch_ParseArchive (&line, targets, VAR_CMD) != SUCCESS) { Parse_Error (PARSE_FATAL, "Error in archive specification: \"%s\"", line); return; } while (*line == ' ' || *line == '\t') line++; cp = line; if (*line == '\0') goto out; continue; } if (c != '$') { cp++; continue; } /* * 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. */ cp = Var_Skip(cp, VAR_CMD, TRUE); } /* * This assumes that line is in a buffer, not a string... */ *cp = '\0'; sline = string_create(line); /* * Have a word in line. See if it's a special target and set * specType to match it. */ if (*line == '.' && isupper (line[1])) { /* * See if the target is a special target that must have it * or its sources handled specially. */ int keywd = ParseFindKeyword(line); if (keywd != -1) { if (specType == Path && parseKeywords[keywd].spec != Path) { Parse_Error(PARSE_FATAL, "Mismatched special targets"); return; } specType = parseKeywords[keywd].spec; specOp = parseKeywords[keywd].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. * .BEGIN * .END * .ERROR * .EXIT * .INTERRUPT Are not to be considered the * main target. * .NOTPARALLEL Make only one target at a time. * .ORDER Must set initial predecessor to NIL */ switch (specType) { case Path: if (paths == NULL) { paths = Lst_Init(); } (void)Lst_AtEnd(paths, (ClientData)dirSearchPath); break; case Main: if (!Lst_IsEmpty(create)) { specType = Not; } break; case NotMain: gn = Targ_FindNode(sline, TARG_CREATE); gn->type |= OP_NOTMAIN; (void)Lst_AtEnd(targets, (ClientData)gn); break; case Default: gn = Targ_NewGN(s_DEFAULT); gn->type |= (OP_NOTMAIN|OP_TRANSFORM); (void)Lst_AtEnd(targets, (ClientData)gn); DEFAULT = gn; break; case Order: predecessor = NILGNODE; break; default: break; } } else if (strncmp (line, ".PATH", 5) == 0) { /* * .PATH has to be handled specially. * Call on the suffix module to give us a path to * modify. */ Lst path; string_t pathSuff; specType = Path; pathSuff = string_create(&line[5]); path = Suff_GetPath (pathSuff); string_deref(pathSuff); if (path == NILLST) { Parse_Error (PARSE_FATAL, "Suffix '%s' not defined (yet)", pathSuff->data); return; } if (paths == (Lst)NULL) paths = Lst_Init(); (void)Lst_AtEnd(paths, (ClientData)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') { if (DEBUG(SUFF)) printf("ParseDoDep: %s\n", line); if (Suff_IsTransform (sline)) gn = Suff_AddTransform (sline); else gn = Targ_FindNode (sline, TARG_CREATE); (void)Lst_AtEnd (targets, (ClientData)gn); } else if (specType == Path && *line != '.' && *line != '\0') Parse_Error(PARSE_WARNING, "Extra target (%s) ignored", sline->data); *cp = c; string_deref(sline); /* * If it is a special type and not .PATH, it's the only target we * allow on this line... */ if (specType != Not && specType != Path) { while (*cp && *cp != ' ' && *cp != '\t') cp++; if (*cp) Parse_Error(PARSE_WARNING, "Extra target(s) ignored"); break; } while (*cp == ' ' || *cp == '\t') cp++; line = cp; } out: switch(specType) { case Default: case NotMain: /* * These 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; default: if (!Lst_IsEmpty(targets)) Parse_Error(PARSE_WARNING, "Special and normal targets, normal ones ignored."); break; } /* * Have now parsed all the target names. Must parse the operator next. The * result is left in op . */ if (modifier == '!') op = OP_FORCE; else if (modifier == ':') op = OP_DOUBLEDEP; else op = OP_DEPENDS; Lst_ForEach (targets, ParseDoOp, (ClientData)op); switch (specType) { case Suffixes: ParseDoSources(buf, dependents, FALSE, Suff_AddSuffix); break; case Path: specPaths = paths; ParseDoSources(buf, dependents, FALSE, ParseAddDirs); if (paths) Lst_Destroy(paths, NOFREE); break; case Includes: ParseDoSources(buf, dependents, FALSE, Suff_AddInclude); break; case Libs: ParseDoSources(buf, dependents, FALSE, Suff_AddLib); break; case Null: ParseDoSources(buf, dependents, FALSE, Suff_SetNull); break; default: ParseDoSources(buf, dependents, TRUE, ParseDoSrc); if (mainNode == NILGNODE) { /* * 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 (targets, ParseFindMain, (ClientData)NULL); } } } /*- *--------------------------------------------------------------------- * ParseDoVar -- * 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. *--------------------------------------------------------------------- */ static void ParseDoVar ( char *name, /* the variable name */ int modifier, /* Modifer for variable assignment */ char *value, /* Value for variable */ GNode *ctxt) /* Context in which to do the assignment */ { char result[BUFSIZ]; /* Result of command */ const char *args[4]; /* Args for invoking the shell */ int fds[2]; /* Pipe streams */ int cpid; /* Child PID */ int pid; /* PID from wait() */ Boolean freeCmd; /* TRUE if the command needs to be freed, i.e. * if any variable expansion was performed */ string_t var, val; var = string_create(name); while (*value == ' ' || *value == '\t') value++; if (modifier == '+') { val = string_create(value); Var_Append (var, val, ctxt); string_deref(val); return; } if (modifier == '?') { /* * If the variable already has a value, we don't do anything. */ if (!Var_Exists(var, ctxt)) { val = string_create(value); Var_Set (var, val, ctxt); string_deref(val); } return; } if (modifier == ':') { /* * 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.. $(CFLAGS) * * And not get an error. */ Boolean oldOldVars = oldVars; oldVars = FALSE; value = Var_Subst(value, ctxt, FALSE); oldVars = oldOldVars; val = string_create(value); free(value); Var_Set(var, val, ctxt); string_deref(val); return; } if (modifier != '!') { /* * Normal assignment -- just do it. */ val = string_create(value); Var_Set (var, val, ctxt); string_deref(val); return; } /* * Set up arguments for shell */ args[0] = "sh"; args[1] = "-c"; if (strchr(value, '$') != (char *)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. */ args[2] = Var_Subst(value, VAR_CMD, TRUE); freeCmd = TRUE; } else { args[2] = value; freeCmd = FALSE; } args[3] = (char *)NULL; /* * Open a pipe for fetching its output */ pipe(fds); /* * Fork */ cpid = fork(); if (cpid == 0) { /* * Close input side of pipe */ close(fds[0]); /* * Duplicate the output stream to the shell's output, then * shut the extra thing down. Note we don't fetch the error * stream...why not? Why? */ dup2(fds[1], 1); close(fds[1]); execv("/bin/sh", (char * const *)args); _exit(1); } else if (cpid < 0) { /* * Couldn't fork -- tell the user and make the variable null */ Parse_Error(PARSE_FATAL, "Couldn't exec \"%s\"", value); Var_Set(var, sNULL, ctxt); } else { int status; int cc; /* * No need for the writing half */ close(fds[1]); /* * Wait for the process to exit. * * XXX: If the child writes more than a pipe's worth, we will * deadlock. */ if ((pid = waitpid(cpid, &status, 0)) != cpid) { Parse_Error(PARSE_FATAL, "unexpected error from waitpid: %s", strerror(errno)); } /* * Read all the characters the child wrote. */ cc = read(fds[0], result, sizeof(result)); if (cc < 0) { /* * Couldn't read the child's output -- tell the user and * set the variable to null */ Parse_Error(PARSE_FATAL, "Couldn't read shell's output"); cc = 0; } if (status) { /* * Child returned an error -- tell the user but still use * the result. */ Parse_Error(PARSE_FATAL, "\"%s\" returned non-zero", value); } /* * Null-terminate the result, convert newlines to spaces and * install it in the variable. */ result[cc] = '\0'; value = &result[cc] - 1; if (*value == '\n') { /* * A final newline is just stripped */ *value-- = '\0'; } while (value >= result) { if (*value == '\n') { *value = ' '; } value--; } val = string_create(result); Var_Set(var, val, ctxt); string_deref(val); /* * Close the input side of the pipe. */ close(fds[0]); } if (freeCmd) free((void *)args[2]); } /*- *--------------------------------------------------------------------- * 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. *--------------------------------------------------------------------- */ int Parse_DoVar(char *line, GNode *ctxt) { register char *cp; for (cp = line; *cp != '='; cp++) if (*cp == '\0' || *cp == ' ' || *cp == '\t') return(1); *cp++ = '\0'; ParseDoVar(line, 0, cp, ctxt); return(0); } /*- *--------------------------------------------------------------------- * ParseVarOrDep -- * 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. *--------------------------------------------------------------------- */ int ParseVarOrDep(Buffer buf, char **linePtr, int *modifierPtr) { register char *cp; /* pointer into line */ char *line = *linePtr; Boolean oweSpace; *modifierPtr = '\0'; /* * Skip to operator character, nulling out whitespace as we go */ cp = line; oweSpace = FALSE; for (;;) { while (*cp == ' ' || *cp == '\t') cp++; for (;;) { if (*cp == '$') { char *result; int length; Boolean freeIt; result = Var_Parse(cp, VAR_CMD, TRUE, &length, &freeIt); if (result == var_Error && !oldVars) { Parse_Error(PARSE_FATAL, "Bad embedded variable"); return(1); } if (oweSpace) { Buf_AddByte(buf, (Byte) ' '); oweSpace = FALSE; } Buf_AddBytes(buf, strlen(result), (Byte *)result); if (freeIt) free(result); cp += length; continue; } if (*cp == '=') break; if (*cp == ' ' || *cp == '\t') break; if (*cp == '\0') { Parse_Error(PARSE_FATAL, "\"%s\" unrecognized input", line); return(1); } if (*(cp+1) == '=') { if (*cp == '+' || *cp == '?' || *cp == ':' || *cp == '!') *modifierPtr = (int) *cp++; else Buf_AddByte(buf, (Byte) *cp++); break; } if (*cp == '!') { *modifierPtr = (int) *cp; *cp = ':'; break; } if (*cp == ':') { if (*(cp+1) == ':') *modifierPtr = (int) *cp++; break; } if (oweSpace) { Buf_AddByte(buf, (Byte) ' '); oweSpace = FALSE; } Buf_AddByte(buf, (Byte) *cp++); } if (*cp == '=' || *cp == ':') break; oweSpace = TRUE; cp++; } /* * Handle empty lhs */ if (Buf_Size(buf) == 0 && *cp == '=') { Parse_Error(PARSE_FATAL, "\"%s\" null variable assignment", line); return(1); } *linePtr = cp; return(0); } /*- * ParseAddCmd -- * Lst_ForEach function to add a command line to all targets * * Results: * Always 0 * * Side Effects: * A new element is added to the commands list of the node. */ static int ParseAddCmd( ClientData gnCD, /* the node to which the command is to be added */ ClientData cmd) /* the command to add */ { GNode *gn = (GNode *)gnCD; /* if target already supplied, ignore commands */ if ((gn->type & OP_HAS_COMMANDS) == 0) (void)Lst_AtEnd(gn->commands, (ClientData)string_ref((string_t)cmd)); return(0); } /*- *----------------------------------------------------------------------- * 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: * Always 0. * * Side Effects: * OP_HAS_COMMANDS may be set for the target. * *----------------------------------------------------------------------- */ static void ParseHasCommands(ClientData gnCD) { GNode *gn = (GNode *)gnCD; /* Node to examine */ 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 (string_t dir) /* The name of the directory to add */ { Dir_AddDir (parseIncPath, dir); } /*- *--------------------------------------------------------------------- * ParseDoInclude -- * Push to another file. * * 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 * * Results: * None * * Side Effects: * A structure is added to the includes Lst and readProc, lineno, * fname and curFILE are altered for the new file *--------------------------------------------------------------------- */ static void ParseDoInclude (char *file, /* file specification */ Boolean ignoreFailure) { string_t fullname; /* full pathname of file */ IFile *oldFile; /* state associated with current 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 */ string_t sfile; /* * Skip to delimiter character so we know where to look */ while ((*file == ' ') || (*file == '\t')) { file++; } if ((*file != '"') && (*file != '<')) { Parse_Error (PARSE_FATAL, ".%sinclude filename must be delimited by '\"' or '<'", ignoreFailure ? "try" : ""); 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 && *cp != endc; cp++) { continue; } if (*cp != endc) { Parse_Error (PARSE_FATAL, "Unclosed .%sinclude filename. '%c' expected", ignoreFailure ? "try" : "", endc); return; } *cp = '\0'; /* * Substitute for any variables in the file name before trying to * find the thing. */ if (strchr(file, '$') != (char *) NULL) file = 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. */ sfile = string_create(file); if (makeincludecompat) { fullname = Dir_FindFile(sfile, dirSearchPath); if (fullname == (string_t) NULL) fullname = Dir_FindFile (sfile, parseIncPath); if (fullname == (string_t) NULL) fullname = Dir_FindFile(sfile, sysIncPath); } else { if (!isSystem) { fullname = Dir_FindFile(sfile, dirSearchPath); } else { fullname = Dir_FindFile (sfile, parseIncPath); if (fullname == (string_t) NULL) fullname = Dir_FindFile(sfile, sysIncPath); } } if (fullname == (string_t) NULL) { if (!ignoreFailure) Parse_Error (PARSE_FATAL, "Could not find %s", file); return; } /* * Once we find the absolute path to the file, we get to save all the * state from the current file before we can start reading this * include file. The state is stored in an IFile structure which * is placed on a list with other IFile structures. The list makes * a very nice stack to track how we got here... */ oldFile = (IFile *) emalloc (sizeof (IFile)); oldFile->fname = fname; oldFile->F = curFILE; oldFile->lineno = lineno; (void) Lst_AtFront (includes, (ClientData)oldFile); /* * Once the previous state has been saved, we can get down to reading * the new 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. Naturally enough, we start reading at line number 0. */ fname = fullname; lineno = 0; curFILE = fopen (fullname->data, "r"); if (curFILE == (FILE * ) NULL) { Parse_Error (PARSE_FATAL, "Cannot open %s", fullname->data); /* * Pop to previous file */ (void) ParseEOF(0); } if (DEBUG(SUFF)) { printf("ParseDoInclude: now reading %s\n", fullname->data); fflush(stdout); } } /*- *--------------------------------------------------------------------- * ParseEOF -- * 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, is closed. The includes list is shortened. * lineno, curFILE, and fname are changed if CONTINUE is returned. *--------------------------------------------------------------------- */ static int ParseEOF (int opened) { IFile *ifile; /* the state on the top of the includes stack */ if (DEBUG(SUFF)) { printf("ParseEOF: %s\n", fname->data); } if (Lst_IsEmpty (includes)) { return (DONE); } ifile = (IFile *) Lst_DeQueue (includes); string_deref (fname); fname = ifile->fname; lineno = ifile->lineno; if (opened) (void) fclose (curFILE); curFILE = ifile->F; free ((Address)ifile); return (CONTINUE); } /*- *--------------------------------------------------------------------- * ParseReadc -- * Read a character from the current file and update the line number * counter as necessary * * Results: * The character that was read * * Side Effects: * The lineno counter is incremented if the character is a newline *--------------------------------------------------------------------- */ #define ParseReadc() (getc(curFILE)) /*- *--------------------------------------------------------------------- * 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 Boolean ParseBlankLines (int *cptr) { register int c; /* * Discard completely blank and comment lines. */ for (;;) { c = ParseReadc(); if (c == EOF) return(FALSE); if (!parseMeta[c]) break; if (c == '\n') { lineno++; continue; } if (c != '#') break; for (;;) { int lastc; lastc = c; c = ParseReadc(); if (c == EOF) return(FALSE); if (c == '\n') { lineno++; if (lastc != '\\') break; } } } *cptr = c; return(TRUE); } static Boolean ParseReadLine (register Buffer buf) { int c; /* the current character */ if (!ParseBlankLines(&c)) return(FALSE); /* * Handle special-characters at the beginning of the line. Either a * leading tab (shell command) or dot (possible conditional) * forces us to ignore comments and dependency operators and treat * semi-colons as semi-colons (by leaving semiNL FALSE). */ if (c == '\t') { Buf_AddByte (buf, (Byte)c); while ((c = ParseReadc()) == ' ' || c == '\t') ; while (c != EOF) { /* * Nothing special */ if (!parseMeta[c]) { Buf_AddByte (buf, (Byte)c); c = ParseReadc(); continue; } /* * Unescaped newline - we are done */ if (c == '\n') { lineno++; return(TRUE); } /* * Maybe escaped newline? */ if (c != '\\') { Buf_AddByte (buf, (Byte)c); c = ParseReadc(); continue; } c = ParseReadc(); if (c != '\n') { Buf_AddByte (buf, (Byte)'\\'); Buf_AddByte (buf, (Byte)c); c = ParseReadc(); continue; } /* * 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... */ lineno++; while ((c = ParseReadc()) == ' ' || c == '\t') ; Buf_AddByte (buf, (Byte)' '); } return(FALSE); } Buf_AddByte (buf, (Byte)c); c = ParseReadc(); while (c != EOF) { /* * Nothing special */ if (!parseMeta[c]) { Buf_AddByte (buf, (Byte)c); c = ParseReadc(); continue; } /* * Unescaped newline - we are done */ if (c == '\n') { lineno++; return(TRUE); } /* * Maybe escaped newline? */ if (c == '\\') { c = ParseReadc(); if (c == '\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... */ lineno++; while ((c = ParseReadc()) == ' ' || c == '\t') ; Buf_AddByte (buf, (Byte)' '); continue; } Buf_AddByte (buf, (Byte)'\\'); } /* * Not a comment... */ if (c != '#') { Buf_AddByte (buf, (Byte)c); c = ParseReadc(); continue; } /* * If the character is a hash mark, this is a comment. * Skip to the end of the line. */ for (;;) { c = ParseReadc(); if (c == EOF) return(FALSE); if (c == '\n') { lineno++; return(TRUE); } while (c == '\\') { c = ParseReadc(); if (c == '\n') { lineno++; break; } if (c == EOF) return(FALSE); } } } return(FALSE); } /*- *----------------------------------------------------------------------- * ParseFinishLine -- * Handle the end of a dependency group. * * Results: * Nothing. * * Side Effects: * inLine set FALSE. 'targets' list destroyed. * *----------------------------------------------------------------------- */ static void ParseFinishLine(void) { if (inLine) { Lst_ForEach(targets, Suff_EndTransform, (ClientData)NULL); Lst_Destroy (targets, ParseHasCommands); inLine = FALSE; } } /*- *--------------------------------------------------------------------- * 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( string_t name, /* the name of the file being read */ FILE * stream) /* Stream open to makefile to parse */ { register char *cp; /* pointer into the line */ char *line; /* the line we're working on */ Buffer buf; /* Buffer for current line */ Buffer parseBuf; int lineLength; /* Length of result */ int modifier; inLine = FALSE; fname = name; curFILE = stream; lineno = 0; fatals = 0; buf = Buf_Init(0); parseBuf = Buf_Init(0); do { while (ParseReadLine (buf)) { line = (char *)Buf_GetBase (buf); lineLength = Buf_Size (buf); if (*line == '.' && !isupper(line[1])) { /* * Lines that begin with the special character are either * include, undef or conditional directives. */ for (cp = line + 1; *cp == ' ' || *cp == '\t'; cp++) { continue; } if (*cp && cp[1] == 'n' && strncmp(cp, "include", 7) == 0) { ParseDoInclude (cp + 7, FALSE); Buf_Discard (buf, lineLength); continue; } if (*cp == 't' && strncmp(cp, "tryinclude", 10) == 0) { ParseDoInclude (cp + 10, TRUE); Buf_Discard (buf, lineLength); continue; } #ifdef SNI_MIPSMAG } else if (strncmp(cp, "MAKEFLAGS", 9) == 0) { printf("This seems wrong - explain this to OSF !!!\n"); cp += 10; Var_Append(".MAKEFLAGS", cp, VAR_GLOBAL); goto nextLine; #endif /* SNI_MIPSMAG */ if (*cp == 'u' && strncmp(cp, "undef", 5) == 0) { char *cp2; for (cp += 5; *cp == ' ' || *cp == '\t'; cp++) continue; for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++) continue; *cp2 = '\0'; Var_Delete(string_create(cp), VAR_GLOBAL); Buf_Discard (buf, lineLength); continue; } /* * The line might be a conditional. Ask the conditional module * about it and act accordingly */ switch (Cond_Eval (cp)) { case 0: break; case 1: Buf_Discard (buf, lineLength); continue; default: goto next; } /* * Skip to next conditional that evaluates to 1. */ do { int c = '\0'; Buf_Discard (buf, lineLength); for (;;) { int lastc; lastc = c; c = ParseReadc(); /* * Skip lines until get to one that begins with a * special char (dot). */ if ((c == '.') || (c == EOF)) break; while ((c != '\n' || lastc == '\\') && c != EOF) { /* * Advance to next unescaped newline */ if ((lastc = c) == '\n') lineno++; c = ParseReadc(); } lineno++; } if (c == EOF || !ParseReadLine (buf)) { Parse_Error (PARSE_FATAL, "Unclosed conditional"); goto eof; } line = (char *)Buf_GetBase(buf); lineLength = Buf_Size (buf); } while (Cond_Eval(line) != 1); Buf_Discard (buf, lineLength); continue; } if (*line == '\t') { /* * If a line starts with a tab, it * can only hope to be a creation command. */ cp = line + 1; if (*cp) { if (inLine) { /* * 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 (targets, ParseAddCmd, (ClientData)string_create(cp)); } else { Parse_Error (PARSE_FATAL, "Unassociated shell command \"%.20s\"", cp); } } Buf_Discard (buf, lineLength); continue; } for (cp = line; *cp == ' ' || *cp == '\t'; cp++) continue; if (*cp == '\0') { Buf_Discard (buf, lineLength); continue; } next: ParseFinishLine(); /* * Parse the line as a variable assignment or dependency line. * On success, parseBuf will either contain the variable name * or the list of targets, each separated by a single space. * line will be updated to point to either an equal-sign (=) or * colon (:). modifier, if non-null, will contain either the * variable or dependency modifier character. */ if (ParseVarOrDep (parseBuf, &line, &modifier) != 0) { Buf_Discard (buf, lineLength); if ((lineLength = Buf_Size (parseBuf))) Buf_Discard (parseBuf, lineLength); continue; } /* * Handle the variable assignment */ if (*line == '=') { cp = (char *) Buf_GetBase (parseBuf); ParseDoVar (cp, modifier, ++line, VAR_GLOBAL); Buf_Discard (buf, lineLength); Buf_Discard (parseBuf, Buf_Size(parseBuf)); continue; } /* * Need a non-circular list for the target nodes */ targets = Lst_Init(); inLine = TRUE; for (cp = line + 1; *cp == ' ' || *cp == '\t'; cp++) ; ParseDoDependency (parseBuf, modifier, cp); if (haveLookahead) { cp = (char *) Buf_GetBase (lookaheadBuf); Lst_ForEach (targets, ParseAddCmd, (ClientData)string_create(cp)); Buf_Discard(lookaheadBuf, Buf_Size(lookaheadBuf)); haveLookahead = FALSE; } Buf_Discard (buf, lineLength); Buf_Discard (parseBuf, Buf_Size(parseBuf)); } eof:; /* * Reached EOF, but it may be just EOF of an include file... */ } while (ParseEOF(1) == CONTINUE); Buf_Destroy (buf); /* * Make sure conditionals are clean */ Cond_End(); if (fatals) { fprintf (stderr, "Fatal errors encountered -- cannot continue\n"); exit (1); } } /*- *--------------------------------------------------------------------- * Parse_Init -- * initialize the parsing module * * Results: * none * * Side Effects: * the parseIncPath list is initialized... *--------------------------------------------------------------------- */ void Parse_Init (void) { char *cp, *start; char *syspath; string_t start_str; mainNode = NILGNODE; parseIncPath = Lst_Init(); sysIncPath = Lst_Init(); includes = Lst_Init(); lookaheadBuf = Buf_Init(0); for (cp = (char *)" \t\\\n#$;("; *cp; cp++) parseMeta[*(unsigned char *)cp] = 1; parseMeta['\0'] = 1; makeincludecompat = (getenv("MAKEINCLUDECOMPAT") != NULL); if ((syspath = getenv("MAKESYSPATH")) == NULL) syspath = strdup(_PATH_DEFSYSPATH); else syspath = strdup(syspath); if (syspath == NULL) enomem(); /* * Add the directories from the syspath (more than one may be given * as dir1:...:dirn) to the system include path. */ for (start = syspath; *start != '\0'; start = cp) { for (cp = start; *cp != '\0' && *cp != ':'; cp++) { ; } if (*cp != '\0') *cp++ = '\0'; start_str = string_create(start); Dir_AddDir(sysIncPath, start_str); } free(syspath); } /*- *----------------------------------------------------------------------- * 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. * *----------------------------------------------------------------------- */ Lst Parse_MainName(void) { Lst main; /* result list */ main = Lst_Init(); if (mainNode == NILGNODE) { Punt ("make: no target to make.\n"); /*NOTREACHED*/ } else if (mainNode->type & OP_DOUBLEDEP) { Lst_Concat(main, mainNode->cohorts, LST_CONCNEW); } (void) Lst_AtEnd (main, (ClientData)mainNode); return (main); } void ParseErrorCond(const char *fmt, ...) { va_list ap; (void)fflush(stdout); (void)fprintf(stderr, "\"%s\", line %d: ", fname->data, lineno); va_start(ap, fmt); (void)vfprintf(stderr, fmt, ap); va_end(ap); (void)fprintf(stderr, "\n"); (void)fflush(stderr); fatals += 1; }