3858 lines
98 KiB
C
3858 lines
98 KiB
C
/* $NetBSD: var.c,v 1.152 2009/06/16 05:44:06 sjg Exp $ */
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/*
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* Copyright (c) 1988, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
|
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef MAKE_NATIVE
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static char rcsid[] = "$NetBSD: var.c,v 1.152 2009/06/16 05:44:06 sjg Exp $";
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#else
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)var.c 8.3 (Berkeley) 3/19/94";
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#else
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__RCSID("$NetBSD: var.c,v 1.152 2009/06/16 05:44:06 sjg Exp $");
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#endif
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#endif /* not lint */
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#endif
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/*-
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* var.c --
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* Variable-handling functions
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*
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* Interface:
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* Var_Set Set the value of a variable in the given
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* context. The variable is created if it doesn't
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* yet exist. The value and variable name need not
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* be preserved.
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*
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* Var_Append Append more characters to an existing variable
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* in the given context. The variable needn't
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* exist already -- it will be created if it doesn't.
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* A space is placed between the old value and the
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* new one.
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*
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* Var_Exists See if a variable exists.
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*
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* Var_Value Return the value of a variable in a context or
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* NULL if the variable is undefined.
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*
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* Var_Subst Substitute named variable, or all variables if
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* NULL in a string using
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* the given context as the top-most one. If the
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* third argument is non-zero, Parse_Error is
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* called if any variables are undefined.
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*
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* Var_Parse Parse a variable expansion from a string and
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* return the result and the number of characters
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* consumed.
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*
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* Var_Delete Delete a variable in a context.
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*
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* Var_Init Initialize this module.
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*
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* Debugging:
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* Var_Dump Print out all variables defined in the given
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* context.
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*
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* XXX: There's a lot of duplication in these functions.
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*/
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#ifndef NO_REGEX
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#include <sys/types.h>
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#include <regex.h>
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#endif
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#include <ctype.h>
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#include <stdlib.h>
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#include <limits.h>
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#include "make.h"
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#include "buf.h"
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#include "dir.h"
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#include "job.h"
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/*
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* This is a harmless return value for Var_Parse that can be used by Var_Subst
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* to determine if there was an error in parsing -- easier than returning
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* a flag, as things outside this module don't give a hoot.
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*/
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char var_Error[] = "";
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/*
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* Similar to var_Error, but returned when the 'errnum' flag for Var_Parse is
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* set false. Why not just use a constant? Well, gcc likes to condense
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* identical string instances...
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*/
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static char varNoError[] = "";
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/*
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* Internally, variables are contained in four different contexts.
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* 1) the environment. They may not be changed. If an environment
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* variable is appended-to, the result is placed in the global
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* context.
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* 2) the global context. Variables set in the Makefile are located in
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* the global context. It is the penultimate context searched when
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* substituting.
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* 3) the command-line context. All variables set on the command line
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* are placed in this context. They are UNALTERABLE once placed here.
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* 4) the local context. Each target has associated with it a context
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* list. On this list are located the structures describing such
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* local variables as $(@) and $(*)
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* The four contexts are searched in the reverse order from which they are
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* listed.
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*/
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GNode *VAR_GLOBAL; /* variables from the makefile */
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GNode *VAR_CMD; /* variables defined on the command-line */
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#define FIND_CMD 0x1 /* look in VAR_CMD when searching */
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#define FIND_GLOBAL 0x2 /* look in VAR_GLOBAL as well */
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#define FIND_ENV 0x4 /* look in the environment also */
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typedef struct Var {
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char *name; /* the variable's name */
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Buffer val; /* its value */
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int flags; /* miscellaneous status flags */
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#define VAR_IN_USE 1 /* Variable's value currently being used.
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* Used to avoid recursion */
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#define VAR_FROM_ENV 2 /* Variable comes from the environment */
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#define VAR_JUNK 4 /* Variable is a junk variable that
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* should be destroyed when done with
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* it. Used by Var_Parse for undefined,
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* modified variables */
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#define VAR_KEEP 8 /* Variable is VAR_JUNK, but we found
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* a use for it in some modifier and
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* the value is therefore valid */
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#define VAR_EXPORTED 16 /* Variable is exported */
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#define VAR_REEXPORT 32 /* Indicate if var needs re-export.
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* This would be true if it contains $'s
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*/
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#define VAR_FROM_CMD 64 /* Variable came from command line */
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} Var;
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/*
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* Exporting vars is expensive so skip it if we can
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*/
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#define VAR_EXPORTED_NONE 0
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#define VAR_EXPORTED_YES 1
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#define VAR_EXPORTED_ALL 2
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static int var_exportedVars = VAR_EXPORTED_NONE;
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/*
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* We pass this to Var_Export when doing the initial export
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* or after updating an exported var.
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*/
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#define VAR_EXPORT_PARENT 1
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/* Var*Pattern flags */
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#define VAR_SUB_GLOBAL 0x01 /* Apply substitution globally */
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#define VAR_SUB_ONE 0x02 /* Apply substitution to one word */
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#define VAR_SUB_MATCHED 0x04 /* There was a match */
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#define VAR_MATCH_START 0x08 /* Match at start of word */
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#define VAR_MATCH_END 0x10 /* Match at end of word */
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#define VAR_NOSUBST 0x20 /* don't expand vars in VarGetPattern */
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/* Var_Set flags */
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#define VAR_NO_EXPORT 0x01 /* do not export */
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typedef struct {
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/*
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* The following fields are set by Var_Parse() when it
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* encounters modifiers that need to keep state for use by
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* subsequent modifiers within the same variable expansion.
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*/
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Byte varSpace; /* Word separator in expansions */
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Boolean oneBigWord; /* TRUE if we will treat the variable as a
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* single big word, even if it contains
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* embedded spaces (as opposed to the
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* usual behaviour of treating it as
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* several space-separated words). */
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} Var_Parse_State;
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/* struct passed as 'void *' to VarSubstitute() for ":S/lhs/rhs/",
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* to VarSYSVMatch() for ":lhs=rhs". */
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typedef struct {
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const char *lhs; /* String to match */
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int leftLen; /* Length of string */
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const char *rhs; /* Replacement string (w/ &'s removed) */
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int rightLen; /* Length of replacement */
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int flags;
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} VarPattern;
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/* struct passed as 'void *' to VarLoopExpand() for ":@tvar@str@" */
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typedef struct {
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GNode *ctxt; /* variable context */
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char *tvar; /* name of temp var */
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int tvarLen;
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char *str; /* string to expand */
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int strLen;
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int errnum; /* errnum for not defined */
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} VarLoop_t;
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#ifndef NO_REGEX
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/* struct passed as 'void *' to VarRESubstitute() for ":C///" */
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typedef struct {
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regex_t re;
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int nsub;
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regmatch_t *matches;
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char *replace;
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int flags;
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} VarREPattern;
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#endif
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/* struct passed to VarSelectWords() for ":[start..end]" */
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typedef struct {
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int start; /* first word to select */
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int end; /* last word to select */
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} VarSelectWords_t;
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static Var *VarFind(const char *, GNode *, int);
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static void VarAdd(const char *, const char *, GNode *);
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static Boolean VarHead(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static Boolean VarTail(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static Boolean VarSuffix(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static Boolean VarRoot(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static Boolean VarMatch(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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#ifdef SYSVVARSUB
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static Boolean VarSYSVMatch(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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#endif
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static Boolean VarNoMatch(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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#ifndef NO_REGEX
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static void VarREError(int, regex_t *, const char *);
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static Boolean VarRESubstitute(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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#endif
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static Boolean VarSubstitute(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static Boolean VarLoopExpand(GNode *, Var_Parse_State *,
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char *, Boolean, Buffer *, void *);
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static char *VarGetPattern(GNode *, Var_Parse_State *,
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int, const char **, int, int *, int *,
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VarPattern *);
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static char *VarQuote(char *);
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static char *VarChangeCase(char *, int);
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static char *VarModify(GNode *, Var_Parse_State *,
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const char *,
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Boolean (*)(GNode *, Var_Parse_State *, char *, Boolean, Buffer *, void *),
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void *);
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static char *VarOrder(const char *, const char);
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static char *VarUniq(const char *);
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static int VarWordCompare(const void *, const void *);
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static void VarPrintVar(void *);
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#define BROPEN '{'
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#define BRCLOSE '}'
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#define PROPEN '('
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#define PRCLOSE ')'
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/*-
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*-----------------------------------------------------------------------
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* VarFind --
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* Find the given variable in the given context and any other contexts
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* indicated.
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*
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* Input:
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* name name to find
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* ctxt context in which to find it
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* flags FIND_GLOBAL set means to look in the
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* VAR_GLOBAL context as well. FIND_CMD set means
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* to look in the VAR_CMD context also. FIND_ENV
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* set means to look in the environment
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*
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* Results:
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* A pointer to the structure describing the desired variable or
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* NULL if the variable does not exist.
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*
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* Side Effects:
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* None
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*-----------------------------------------------------------------------
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*/
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static Var *
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VarFind(const char *name, GNode *ctxt, int flags)
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{
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Hash_Entry *var;
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Var *v;
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/*
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* If the variable name begins with a '.', it could very well be one of
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* the local ones. We check the name against all the local variables
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* and substitute the short version in for 'name' if it matches one of
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* them.
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*/
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if (*name == '.' && isupper((unsigned char) name[1]))
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switch (name[1]) {
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case 'A':
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if (!strcmp(name, ".ALLSRC"))
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name = ALLSRC;
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if (!strcmp(name, ".ARCHIVE"))
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name = ARCHIVE;
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break;
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case 'I':
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if (!strcmp(name, ".IMPSRC"))
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name = IMPSRC;
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break;
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case 'M':
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if (!strcmp(name, ".MEMBER"))
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name = MEMBER;
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break;
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case 'O':
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if (!strcmp(name, ".OODATE"))
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name = OODATE;
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break;
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case 'P':
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if (!strcmp(name, ".PREFIX"))
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name = PREFIX;
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break;
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case 'T':
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if (!strcmp(name, ".TARGET"))
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name = TARGET;
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break;
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}
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/*
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* First look for the variable in the given context. If it's not there,
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* look for it in VAR_CMD, VAR_GLOBAL and the environment, in that order,
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* depending on the FIND_* flags in 'flags'
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*/
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var = Hash_FindEntry(&ctxt->context, name);
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if ((var == NULL) && (flags & FIND_CMD) && (ctxt != VAR_CMD)) {
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var = Hash_FindEntry(&VAR_CMD->context, name);
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}
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if (!checkEnvFirst && (var == NULL) && (flags & FIND_GLOBAL) &&
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(ctxt != VAR_GLOBAL))
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{
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var = Hash_FindEntry(&VAR_GLOBAL->context, name);
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}
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if ((var == NULL) && (flags & FIND_ENV)) {
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char *env;
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if ((env = getenv(name)) != NULL) {
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int len;
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v = bmake_malloc(sizeof(Var));
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v->name = bmake_strdup(name);
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len = strlen(env);
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Buf_Init(&v->val, len + 1);
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Buf_AddBytes(&v->val, len, env);
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v->flags = VAR_FROM_ENV;
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return (v);
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} else if (checkEnvFirst && (flags & FIND_GLOBAL) &&
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(ctxt != VAR_GLOBAL))
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{
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var = Hash_FindEntry(&VAR_GLOBAL->context, name);
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if (var == NULL) {
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return NULL;
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} else {
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return ((Var *)Hash_GetValue(var));
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}
|
|
} else {
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return NULL;
|
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}
|
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} else if (var == NULL) {
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return NULL;
|
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} else {
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return ((Var *)Hash_GetValue(var));
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}
|
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}
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|
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/*-
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|
*-----------------------------------------------------------------------
|
|
* VarFreeEnv --
|
|
* If the variable is an environment variable, free it
|
|
*
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* Input:
|
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* v the variable
|
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* destroy true if the value buffer should be destroyed.
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*
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* Results:
|
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* 1 if it is an environment variable 0 ow.
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*
|
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* Side Effects:
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* The variable is free'ed if it is an environent variable.
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*-----------------------------------------------------------------------
|
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*/
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static Boolean
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VarFreeEnv(Var *v, Boolean destroy)
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{
|
|
if ((v->flags & VAR_FROM_ENV) == 0)
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return FALSE;
|
|
free(v->name);
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Buf_Destroy(&v->val, destroy);
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free(v);
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return TRUE;
|
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}
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|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarAdd --
|
|
* Add a new variable of name name and value val to the given context
|
|
*
|
|
* Input:
|
|
* name name of variable to add
|
|
* val value to set it to
|
|
* ctxt context in which to set it
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|
*
|
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* Results:
|
|
* None
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|
*
|
|
* Side Effects:
|
|
* The new variable is placed at the front of the given context
|
|
* The name and val arguments are duplicated so they may
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* safely be freed.
|
|
*-----------------------------------------------------------------------
|
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*/
|
|
static void
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VarAdd(const char *name, const char *val, GNode *ctxt)
|
|
{
|
|
Var *v;
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int len;
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|
Hash_Entry *h;
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v = bmake_malloc(sizeof(Var));
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len = val ? strlen(val) : 0;
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Buf_Init(&v->val, len+1);
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Buf_AddBytes(&v->val, len, val);
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v->flags = 0;
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|
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h = Hash_CreateEntry(&ctxt->context, name, NULL);
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Hash_SetValue(h, v);
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v->name = h->name;
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|
if (DEBUG(VAR)) {
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fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
|
|
}
|
|
}
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|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Delete --
|
|
* Remove a variable from a context.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* The Var structure is removed and freed.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
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|
Var_Delete(const char *name, GNode *ctxt)
|
|
{
|
|
Hash_Entry *ln;
|
|
|
|
ln = Hash_FindEntry(&ctxt->context, name);
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "%s:delete %s%s\n",
|
|
ctxt->name, name, ln ? "" : " (not found)");
|
|
}
|
|
if (ln != NULL) {
|
|
Var *v;
|
|
|
|
v = (Var *)Hash_GetValue(ln);
|
|
if ((v->flags & VAR_EXPORTED)) {
|
|
unsetenv(v->name);
|
|
}
|
|
if (v->name != ln->name)
|
|
free(v->name);
|
|
Hash_DeleteEntry(&ctxt->context, ln);
|
|
Buf_Destroy(&v->val, TRUE);
|
|
free(v);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Export a var.
|
|
* We ignore make internal variables (those which start with '.')
|
|
* Also we jump through some hoops to avoid calling setenv
|
|
* more than necessary since it can leak.
|
|
* We only manipulate flags of vars if 'parent' is set.
|
|
*/
|
|
static int
|
|
Var_Export1(const char *name, int parent)
|
|
{
|
|
char tmp[BUFSIZ];
|
|
Var *v;
|
|
char *val = NULL;
|
|
int n;
|
|
|
|
if (*name == '.')
|
|
return 0; /* skip internals */
|
|
if (!name[1]) {
|
|
/*
|
|
* A single char.
|
|
* If it is one of the vars that should only appear in
|
|
* local context, skip it, else we can get Var_Subst
|
|
* into a loop.
|
|
*/
|
|
switch (name[0]) {
|
|
case '@':
|
|
case '%':
|
|
case '*':
|
|
case '!':
|
|
return 0;
|
|
}
|
|
}
|
|
v = VarFind(name, VAR_GLOBAL, 0);
|
|
if (v == NULL) {
|
|
return 0;
|
|
}
|
|
if (!parent &&
|
|
(v->flags & (VAR_EXPORTED|VAR_REEXPORT)) == VAR_EXPORTED) {
|
|
return 0; /* nothing to do */
|
|
}
|
|
val = Buf_GetAll(&v->val, NULL);
|
|
if (strchr(val, '$')) {
|
|
if (parent) {
|
|
/*
|
|
* Flag this as something we need to re-export.
|
|
* No point actually exporting it now though,
|
|
* the child can do it at the last minute.
|
|
*/
|
|
v->flags |= (VAR_EXPORTED|VAR_REEXPORT);
|
|
return 1;
|
|
}
|
|
n = snprintf(tmp, sizeof(tmp), "${%s}", name);
|
|
if (n < (int)sizeof(tmp)) {
|
|
val = Var_Subst(NULL, tmp, VAR_GLOBAL, 0);
|
|
setenv(name, val, 1);
|
|
free(val);
|
|
}
|
|
} else {
|
|
if (parent) {
|
|
v->flags &= ~VAR_REEXPORT; /* once will do */
|
|
}
|
|
if (parent || !(v->flags & VAR_EXPORTED)) {
|
|
setenv(name, val, 1);
|
|
}
|
|
}
|
|
/*
|
|
* This is so Var_Set knows to call Var_Export again...
|
|
*/
|
|
if (parent) {
|
|
v->flags |= VAR_EXPORTED;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* This gets called from our children.
|
|
*/
|
|
void
|
|
Var_ExportVars(void)
|
|
{
|
|
char tmp[BUFSIZ];
|
|
Hash_Entry *var;
|
|
Hash_Search state;
|
|
Var *v;
|
|
char *val;
|
|
int n;
|
|
|
|
if (VAR_EXPORTED_NONE == var_exportedVars)
|
|
return;
|
|
|
|
if (VAR_EXPORTED_ALL == var_exportedVars) {
|
|
/*
|
|
* Ouch! This is crazy...
|
|
*/
|
|
for (var = Hash_EnumFirst(&VAR_GLOBAL->context, &state);
|
|
var != NULL;
|
|
var = Hash_EnumNext(&state)) {
|
|
v = (Var *)Hash_GetValue(var);
|
|
Var_Export1(v->name, 0);
|
|
}
|
|
return;
|
|
}
|
|
/*
|
|
* We have a number of exported vars,
|
|
*/
|
|
n = snprintf(tmp, sizeof(tmp), "${" MAKE_EXPORTED ":O:u}");
|
|
if (n < (int)sizeof(tmp)) {
|
|
char **av;
|
|
char *as;
|
|
int ac;
|
|
int i;
|
|
|
|
val = Var_Subst(NULL, tmp, VAR_GLOBAL, 0);
|
|
av = brk_string(val, &ac, FALSE, &as);
|
|
for (i = 0; i < ac; i++) {
|
|
Var_Export1(av[i], 0);
|
|
}
|
|
free(val);
|
|
free(as);
|
|
free(av);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is called when .export is seen or
|
|
* .MAKE.EXPORTED is modified.
|
|
* It is also called when any exported var is modified.
|
|
*/
|
|
void
|
|
Var_Export(char *str, int isExport)
|
|
{
|
|
char *name;
|
|
char *val;
|
|
char **av;
|
|
char *as;
|
|
int ac;
|
|
int i;
|
|
|
|
if (isExport && (!str || !str[0])) {
|
|
var_exportedVars = VAR_EXPORTED_ALL; /* use with caution! */
|
|
return;
|
|
}
|
|
|
|
val = Var_Subst(NULL, str, VAR_GLOBAL, 0);
|
|
av = brk_string(val, &ac, FALSE, &as);
|
|
for (i = 0; i < ac; i++) {
|
|
name = av[i];
|
|
if (!name[1]) {
|
|
/*
|
|
* A single char.
|
|
* If it is one of the vars that should only appear in
|
|
* local context, skip it, else we can get Var_Subst
|
|
* into a loop.
|
|
*/
|
|
switch (name[0]) {
|
|
case '@':
|
|
case '%':
|
|
case '*':
|
|
case '!':
|
|
continue;
|
|
}
|
|
}
|
|
if (Var_Export1(name, VAR_EXPORT_PARENT)) {
|
|
if (VAR_EXPORTED_ALL != var_exportedVars)
|
|
var_exportedVars = VAR_EXPORTED_YES;
|
|
if (isExport) {
|
|
Var_Append(MAKE_EXPORTED, name, VAR_GLOBAL);
|
|
}
|
|
}
|
|
}
|
|
free(val);
|
|
free(as);
|
|
free(av);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Set --
|
|
* Set the variable name to the value val in the given context.
|
|
*
|
|
* Input:
|
|
* name name of variable to set
|
|
* val value to give to the variable
|
|
* ctxt context in which to set it
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* If the variable doesn't yet exist, a new record is created for it.
|
|
* Else the old value is freed and the new one stuck in its place
|
|
*
|
|
* Notes:
|
|
* The variable is searched for only in its context before being
|
|
* created in that context. I.e. if the context is VAR_GLOBAL,
|
|
* only VAR_GLOBAL->context is searched. Likewise if it is VAR_CMD, only
|
|
* VAR_CMD->context is searched. This is done to avoid the literally
|
|
* thousands of unnecessary strcmp's that used to be done to
|
|
* set, say, $(@) or $(<).
|
|
* If the context is VAR_GLOBAL though, we check if the variable
|
|
* was set in VAR_CMD from the command line and skip it if so.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Set(const char *name, const char *val, GNode *ctxt, int flags)
|
|
{
|
|
Var *v;
|
|
char *expanded_name = NULL;
|
|
|
|
/*
|
|
* We only look for a variable in the given context since anything set
|
|
* here will override anything in a lower context, so there's not much
|
|
* point in searching them all just to save a bit of memory...
|
|
*/
|
|
if (strchr(name, '$') != NULL) {
|
|
expanded_name = Var_Subst(NULL, name, ctxt, 0);
|
|
if (expanded_name[0] == 0) {
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "Var_Set(\"%s\", \"%s\", ...) "
|
|
"name expands to empty string - ignored\n",
|
|
name, val);
|
|
}
|
|
free(expanded_name);
|
|
return;
|
|
}
|
|
name = expanded_name;
|
|
}
|
|
if (ctxt == VAR_GLOBAL) {
|
|
v = VarFind(name, VAR_CMD, 0);
|
|
if (v != NULL) {
|
|
if ((v->flags & VAR_FROM_CMD)) {
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "%s:%s = %s ignored!\n", ctxt->name, name, val);
|
|
}
|
|
goto out;
|
|
}
|
|
VarFreeEnv(v, TRUE);
|
|
}
|
|
}
|
|
v = VarFind(name, ctxt, 0);
|
|
if (v == NULL) {
|
|
VarAdd(name, val, ctxt);
|
|
} else {
|
|
Buf_Empty(&v->val);
|
|
Buf_AddBytes(&v->val, strlen(val), val);
|
|
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
|
|
}
|
|
if ((v->flags & VAR_EXPORTED)) {
|
|
Var_Export1(name, VAR_EXPORT_PARENT);
|
|
}
|
|
}
|
|
/*
|
|
* Any variables given on the command line are automatically exported
|
|
* to the environment (as per POSIX standard)
|
|
*/
|
|
if (ctxt == VAR_CMD && (flags & VAR_NO_EXPORT) == 0) {
|
|
if (v == NULL) {
|
|
/* we just added it */
|
|
v = VarFind(name, ctxt, 0);
|
|
}
|
|
if (v != NULL)
|
|
v->flags |= VAR_FROM_CMD;
|
|
/*
|
|
* If requested, don't export these in the environment
|
|
* individually. We still put them in MAKEOVERRIDES so
|
|
* that the command-line settings continue to override
|
|
* Makefile settings.
|
|
*/
|
|
if (varNoExportEnv != TRUE)
|
|
setenv(name, val, 1);
|
|
|
|
Var_Append(MAKEOVERRIDES, name, VAR_GLOBAL);
|
|
}
|
|
out:
|
|
if (expanded_name != NULL)
|
|
free(expanded_name);
|
|
if (v != NULL)
|
|
VarFreeEnv(v, TRUE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Append --
|
|
* The variable of the given name has the given value appended to it in
|
|
* the given context.
|
|
*
|
|
* Input:
|
|
* name name of variable to modify
|
|
* val String to append to it
|
|
* ctxt Context in which this should occur
|
|
*
|
|
* Results:
|
|
* None
|
|
*
|
|
* Side Effects:
|
|
* If the variable doesn't exist, it is created. Else the strings
|
|
* are concatenated (with a space in between).
|
|
*
|
|
* Notes:
|
|
* Only if the variable is being sought in the global context is the
|
|
* environment searched.
|
|
* XXX: Knows its calling circumstances in that if called with ctxt
|
|
* an actual target, it will only search that context since only
|
|
* a local variable could be being appended to. This is actually
|
|
* a big win and must be tolerated.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Append(const char *name, const char *val, GNode *ctxt)
|
|
{
|
|
Var *v;
|
|
Hash_Entry *h;
|
|
char *expanded_name = NULL;
|
|
|
|
if (strchr(name, '$') != NULL) {
|
|
expanded_name = Var_Subst(NULL, name, ctxt, 0);
|
|
if (expanded_name[0] == 0) {
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "Var_Append(\"%s\", \"%s\", ...) "
|
|
"name expands to empty string - ignored\n",
|
|
name, val);
|
|
}
|
|
free(expanded_name);
|
|
return;
|
|
}
|
|
name = expanded_name;
|
|
}
|
|
|
|
v = VarFind(name, ctxt, (ctxt == VAR_GLOBAL) ? FIND_ENV : 0);
|
|
|
|
if (v == NULL) {
|
|
VarAdd(name, val, ctxt);
|
|
} else {
|
|
Buf_AddByte(&v->val, ' ');
|
|
Buf_AddBytes(&v->val, strlen(val), val);
|
|
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name,
|
|
Buf_GetAll(&v->val, NULL));
|
|
}
|
|
|
|
if (v->flags & VAR_FROM_ENV) {
|
|
/*
|
|
* If the original variable came from the environment, we
|
|
* have to install it in the global context (we could place
|
|
* it in the environment, but then we should provide a way to
|
|
* export other variables...)
|
|
*/
|
|
v->flags &= ~VAR_FROM_ENV;
|
|
h = Hash_CreateEntry(&ctxt->context, name, NULL);
|
|
Hash_SetValue(h, v);
|
|
}
|
|
}
|
|
if (expanded_name != NULL)
|
|
free(expanded_name);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Exists --
|
|
* See if the given variable exists.
|
|
*
|
|
* Input:
|
|
* name Variable to find
|
|
* ctxt Context in which to start search
|
|
*
|
|
* Results:
|
|
* TRUE if it does, FALSE if it doesn't
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
Boolean
|
|
Var_Exists(const char *name, GNode *ctxt)
|
|
{
|
|
Var *v;
|
|
char *cp;
|
|
|
|
if ((cp = strchr(name, '$')) != NULL) {
|
|
cp = Var_Subst(NULL, name, ctxt, FALSE);
|
|
}
|
|
v = VarFind(cp ? cp : name, ctxt, FIND_CMD|FIND_GLOBAL|FIND_ENV);
|
|
if (cp != NULL) {
|
|
free(cp);
|
|
}
|
|
if (v == NULL) {
|
|
return(FALSE);
|
|
} else {
|
|
(void)VarFreeEnv(v, TRUE);
|
|
}
|
|
return(TRUE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Value --
|
|
* Return the value of the named variable in the given context
|
|
*
|
|
* Input:
|
|
* name name to find
|
|
* ctxt context in which to search for it
|
|
*
|
|
* Results:
|
|
* The value if the variable exists, NULL if it doesn't
|
|
*
|
|
* Side Effects:
|
|
* None
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Value(const char *name, GNode *ctxt, char **frp)
|
|
{
|
|
Var *v;
|
|
|
|
v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
*frp = NULL;
|
|
if (v != NULL) {
|
|
char *p = (Buf_GetAll(&v->val, NULL));
|
|
if (VarFreeEnv(v, FALSE))
|
|
*frp = p;
|
|
return p;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarHead --
|
|
* Remove the tail of the given word and place the result in the given
|
|
* buffer.
|
|
*
|
|
* Input:
|
|
* word Word to trim
|
|
* addSpace True if need to add a space to the buffer
|
|
* before sticking in the head
|
|
* buf Buffer in which to store it
|
|
*
|
|
* Results:
|
|
* TRUE if characters were added to the buffer (a space needs to be
|
|
* added to the buffer before the next word).
|
|
*
|
|
* Side Effects:
|
|
* The trimmed word is added to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarHead(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *dummy)
|
|
{
|
|
char *slash;
|
|
|
|
slash = strrchr(word, '/');
|
|
if (slash != NULL) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
*slash = '\0';
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
*slash = '/';
|
|
return (TRUE);
|
|
} else {
|
|
/*
|
|
* If no directory part, give . (q.v. the POSIX standard)
|
|
*/
|
|
if (addSpace && vpstate->varSpace)
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
Buf_AddByte(buf, '.');
|
|
}
|
|
return(dummy ? TRUE : TRUE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarTail --
|
|
* Remove the head of the given word and place the result in the given
|
|
* buffer.
|
|
*
|
|
* Input:
|
|
* word Word to trim
|
|
* addSpace True if need to add a space to the buffer
|
|
* before adding the tail
|
|
* buf Buffer in which to store it
|
|
*
|
|
* Results:
|
|
* TRUE if characters were added to the buffer (a space needs to be
|
|
* added to the buffer before the next word).
|
|
*
|
|
* Side Effects:
|
|
* The trimmed word is added to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarTail(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *dummy)
|
|
{
|
|
char *slash;
|
|
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
|
|
slash = strrchr(word, '/');
|
|
if (slash != NULL) {
|
|
*slash++ = '\0';
|
|
Buf_AddBytes(buf, strlen(slash), slash);
|
|
slash[-1] = '/';
|
|
} else {
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
}
|
|
return (dummy ? TRUE : TRUE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarSuffix --
|
|
* Place the suffix of the given word in the given buffer.
|
|
*
|
|
* Input:
|
|
* word Word to trim
|
|
* addSpace TRUE if need to add a space before placing the
|
|
* suffix in the buffer
|
|
* buf Buffer in which to store it
|
|
*
|
|
* Results:
|
|
* TRUE if characters were added to the buffer (a space needs to be
|
|
* added to the buffer before the next word).
|
|
*
|
|
* Side Effects:
|
|
* The suffix from the word is placed in the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarSuffix(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *dummy)
|
|
{
|
|
char *dot;
|
|
|
|
dot = strrchr(word, '.');
|
|
if (dot != NULL) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
*dot++ = '\0';
|
|
Buf_AddBytes(buf, strlen(dot), dot);
|
|
dot[-1] = '.';
|
|
addSpace = TRUE;
|
|
}
|
|
return (dummy ? addSpace : addSpace);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarRoot --
|
|
* Remove the suffix of the given word and place the result in the
|
|
* buffer.
|
|
*
|
|
* Input:
|
|
* word Word to trim
|
|
* addSpace TRUE if need to add a space to the buffer
|
|
* before placing the root in it
|
|
* buf Buffer in which to store it
|
|
*
|
|
* Results:
|
|
* TRUE if characters were added to the buffer (a space needs to be
|
|
* added to the buffer before the next word).
|
|
*
|
|
* Side Effects:
|
|
* The trimmed word is added to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarRoot(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *dummy)
|
|
{
|
|
char *dot;
|
|
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
|
|
dot = strrchr(word, '.');
|
|
if (dot != NULL) {
|
|
*dot = '\0';
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
*dot = '.';
|
|
} else {
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
}
|
|
return (dummy ? TRUE : TRUE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarMatch --
|
|
* Place the word in the buffer if it matches the given pattern.
|
|
* Callback function for VarModify to implement the :M modifier.
|
|
*
|
|
* Input:
|
|
* word Word to examine
|
|
* addSpace TRUE if need to add a space to the buffer
|
|
* before adding the word, if it matches
|
|
* buf Buffer in which to store it
|
|
* pattern Pattern the word must match
|
|
*
|
|
* Results:
|
|
* TRUE if a space should be placed in the buffer before the next
|
|
* word.
|
|
*
|
|
* Side Effects:
|
|
* The word may be copied to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarMatch(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *pattern)
|
|
{
|
|
if (DEBUG(VAR))
|
|
fprintf(debug_file, "VarMatch [%s] [%s]\n", word, (char *)pattern);
|
|
if (Str_Match(word, (char *)pattern)) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
addSpace = TRUE;
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
}
|
|
return(addSpace);
|
|
}
|
|
|
|
#ifdef SYSVVARSUB
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarSYSVMatch --
|
|
* Place the word in the buffer if it matches the given pattern.
|
|
* Callback function for VarModify to implement the System V %
|
|
* modifiers.
|
|
*
|
|
* Input:
|
|
* word Word to examine
|
|
* addSpace TRUE if need to add a space to the buffer
|
|
* before adding the word, if it matches
|
|
* buf Buffer in which to store it
|
|
* patp Pattern the word must match
|
|
*
|
|
* Results:
|
|
* TRUE if a space should be placed in the buffer before the next
|
|
* word.
|
|
*
|
|
* Side Effects:
|
|
* The word may be copied to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarSYSVMatch(GNode *ctx, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *patp)
|
|
{
|
|
int len;
|
|
char *ptr;
|
|
VarPattern *pat = (VarPattern *)patp;
|
|
char *varexp;
|
|
|
|
if (addSpace && vpstate->varSpace)
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
|
|
addSpace = TRUE;
|
|
|
|
if ((ptr = Str_SYSVMatch(word, pat->lhs, &len)) != NULL) {
|
|
varexp = Var_Subst(NULL, pat->rhs, ctx, 0);
|
|
Str_SYSVSubst(buf, varexp, ptr, len);
|
|
free(varexp);
|
|
} else {
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
}
|
|
|
|
return(addSpace);
|
|
}
|
|
#endif
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarNoMatch --
|
|
* Place the word in the buffer if it doesn't match the given pattern.
|
|
* Callback function for VarModify to implement the :N modifier.
|
|
*
|
|
* Input:
|
|
* word Word to examine
|
|
* addSpace TRUE if need to add a space to the buffer
|
|
* before adding the word, if it matches
|
|
* buf Buffer in which to store it
|
|
* pattern Pattern the word must match
|
|
*
|
|
* Results:
|
|
* TRUE if a space should be placed in the buffer before the next
|
|
* word.
|
|
*
|
|
* Side Effects:
|
|
* The word may be copied to the buffer.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarNoMatch(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *pattern)
|
|
{
|
|
if (!Str_Match(word, (char *)pattern)) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
addSpace = TRUE;
|
|
Buf_AddBytes(buf, strlen(word), word);
|
|
}
|
|
return(addSpace);
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarSubstitute --
|
|
* Perform a string-substitution on the given word, placing the
|
|
* result in the passed buffer.
|
|
*
|
|
* Input:
|
|
* word Word to modify
|
|
* addSpace True if space should be added before
|
|
* other characters
|
|
* buf Buffer for result
|
|
* patternp Pattern for substitution
|
|
*
|
|
* Results:
|
|
* TRUE if a space is needed before more characters are added.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarSubstitute(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *patternp)
|
|
{
|
|
int wordLen; /* Length of word */
|
|
char *cp; /* General pointer */
|
|
VarPattern *pattern = (VarPattern *)patternp;
|
|
|
|
wordLen = strlen(word);
|
|
if ((pattern->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) !=
|
|
(VAR_SUB_ONE|VAR_SUB_MATCHED)) {
|
|
/*
|
|
* Still substituting -- break it down into simple anchored cases
|
|
* and if none of them fits, perform the general substitution case.
|
|
*/
|
|
if ((pattern->flags & VAR_MATCH_START) &&
|
|
(strncmp(word, pattern->lhs, pattern->leftLen) == 0)) {
|
|
/*
|
|
* Anchored at start and beginning of word matches pattern
|
|
*/
|
|
if ((pattern->flags & VAR_MATCH_END) &&
|
|
(wordLen == pattern->leftLen)) {
|
|
/*
|
|
* Also anchored at end and matches to the end (word
|
|
* is same length as pattern) add space and rhs only
|
|
* if rhs is non-null.
|
|
*/
|
|
if (pattern->rightLen != 0) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
addSpace = TRUE;
|
|
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
|
|
}
|
|
pattern->flags |= VAR_SUB_MATCHED;
|
|
} else if (pattern->flags & VAR_MATCH_END) {
|
|
/*
|
|
* Doesn't match to end -- copy word wholesale
|
|
*/
|
|
goto nosub;
|
|
} else {
|
|
/*
|
|
* Matches at start but need to copy in trailing characters
|
|
*/
|
|
if ((pattern->rightLen + wordLen - pattern->leftLen) != 0){
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
addSpace = TRUE;
|
|
}
|
|
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
|
|
Buf_AddBytes(buf, wordLen - pattern->leftLen,
|
|
(word + pattern->leftLen));
|
|
pattern->flags |= VAR_SUB_MATCHED;
|
|
}
|
|
} else if (pattern->flags & VAR_MATCH_START) {
|
|
/*
|
|
* Had to match at start of word and didn't -- copy whole word.
|
|
*/
|
|
goto nosub;
|
|
} else if (pattern->flags & VAR_MATCH_END) {
|
|
/*
|
|
* Anchored at end, Find only place match could occur (leftLen
|
|
* characters from the end of the word) and see if it does. Note
|
|
* that because the $ will be left at the end of the lhs, we have
|
|
* to use strncmp.
|
|
*/
|
|
cp = word + (wordLen - pattern->leftLen);
|
|
if ((cp >= word) &&
|
|
(strncmp(cp, pattern->lhs, pattern->leftLen) == 0)) {
|
|
/*
|
|
* Match found. If we will place characters in the buffer,
|
|
* add a space before hand as indicated by addSpace, then
|
|
* stuff in the initial, unmatched part of the word followed
|
|
* by the right-hand-side.
|
|
*/
|
|
if (((cp - word) + pattern->rightLen) != 0) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
addSpace = TRUE;
|
|
}
|
|
Buf_AddBytes(buf, cp - word, word);
|
|
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
|
|
pattern->flags |= VAR_SUB_MATCHED;
|
|
} else {
|
|
/*
|
|
* Had to match at end and didn't. Copy entire word.
|
|
*/
|
|
goto nosub;
|
|
}
|
|
} else {
|
|
/*
|
|
* Pattern is unanchored: search for the pattern in the word using
|
|
* String_FindSubstring, copying unmatched portions and the
|
|
* right-hand-side for each match found, handling non-global
|
|
* substitutions correctly, etc. When the loop is done, any
|
|
* remaining part of the word (word and wordLen are adjusted
|
|
* accordingly through the loop) is copied straight into the
|
|
* buffer.
|
|
* addSpace is set FALSE as soon as a space is added to the
|
|
* buffer.
|
|
*/
|
|
Boolean done;
|
|
int origSize;
|
|
|
|
done = FALSE;
|
|
origSize = Buf_Size(buf);
|
|
while (!done) {
|
|
cp = Str_FindSubstring(word, pattern->lhs);
|
|
if (cp != NULL) {
|
|
if (addSpace && (((cp - word) + pattern->rightLen) != 0)){
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
addSpace = FALSE;
|
|
}
|
|
Buf_AddBytes(buf, cp-word, word);
|
|
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
|
|
wordLen -= (cp - word) + pattern->leftLen;
|
|
word = cp + pattern->leftLen;
|
|
if (wordLen == 0) {
|
|
done = TRUE;
|
|
}
|
|
if ((pattern->flags & VAR_SUB_GLOBAL) == 0) {
|
|
done = TRUE;
|
|
}
|
|
pattern->flags |= VAR_SUB_MATCHED;
|
|
} else {
|
|
done = TRUE;
|
|
}
|
|
}
|
|
if (wordLen != 0) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
Buf_AddBytes(buf, wordLen, word);
|
|
}
|
|
/*
|
|
* If added characters to the buffer, need to add a space
|
|
* before we add any more. If we didn't add any, just return
|
|
* the previous value of addSpace.
|
|
*/
|
|
return ((Buf_Size(buf) != origSize) || addSpace);
|
|
}
|
|
return (addSpace);
|
|
}
|
|
nosub:
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(buf, vpstate->varSpace);
|
|
}
|
|
Buf_AddBytes(buf, wordLen, word);
|
|
return(TRUE);
|
|
}
|
|
|
|
#ifndef NO_REGEX
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarREError --
|
|
* Print the error caused by a regcomp or regexec call.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* An error gets printed.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static void
|
|
VarREError(int errnum, regex_t *pat, const char *str)
|
|
{
|
|
char *errbuf;
|
|
int errlen;
|
|
|
|
errlen = regerror(errnum, pat, 0, 0);
|
|
errbuf = bmake_malloc(errlen);
|
|
regerror(errnum, pat, errbuf, errlen);
|
|
Error("%s: %s", str, errbuf);
|
|
free(errbuf);
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarRESubstitute --
|
|
* Perform a regex substitution on the given word, placing the
|
|
* result in the passed buffer.
|
|
*
|
|
* Results:
|
|
* TRUE if a space is needed before more characters are added.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarRESubstitute(GNode *ctx __unused, Var_Parse_State *vpstate __unused,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *patternp)
|
|
{
|
|
VarREPattern *pat;
|
|
int xrv;
|
|
char *wp;
|
|
char *rp;
|
|
int added;
|
|
int flags = 0;
|
|
|
|
#define MAYBE_ADD_SPACE() \
|
|
if (addSpace && !added) \
|
|
Buf_AddByte(buf, ' '); \
|
|
added = 1
|
|
|
|
added = 0;
|
|
wp = word;
|
|
pat = patternp;
|
|
|
|
if ((pat->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) ==
|
|
(VAR_SUB_ONE|VAR_SUB_MATCHED))
|
|
xrv = REG_NOMATCH;
|
|
else {
|
|
tryagain:
|
|
xrv = regexec(&pat->re, wp, pat->nsub, pat->matches, flags);
|
|
}
|
|
|
|
switch (xrv) {
|
|
case 0:
|
|
pat->flags |= VAR_SUB_MATCHED;
|
|
if (pat->matches[0].rm_so > 0) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddBytes(buf, pat->matches[0].rm_so, wp);
|
|
}
|
|
|
|
for (rp = pat->replace; *rp; rp++) {
|
|
if ((*rp == '\\') && ((rp[1] == '&') || (rp[1] == '\\'))) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddByte(buf,rp[1]);
|
|
rp++;
|
|
}
|
|
else if ((*rp == '&') ||
|
|
((*rp == '\\') && isdigit((unsigned char)rp[1]))) {
|
|
int n;
|
|
const char *subbuf;
|
|
int sublen;
|
|
char errstr[3];
|
|
|
|
if (*rp == '&') {
|
|
n = 0;
|
|
errstr[0] = '&';
|
|
errstr[1] = '\0';
|
|
} else {
|
|
n = rp[1] - '0';
|
|
errstr[0] = '\\';
|
|
errstr[1] = rp[1];
|
|
errstr[2] = '\0';
|
|
rp++;
|
|
}
|
|
|
|
if (n > pat->nsub) {
|
|
Error("No subexpression %s", &errstr[0]);
|
|
subbuf = "";
|
|
sublen = 0;
|
|
} else if ((pat->matches[n].rm_so == -1) &&
|
|
(pat->matches[n].rm_eo == -1)) {
|
|
Error("No match for subexpression %s", &errstr[0]);
|
|
subbuf = "";
|
|
sublen = 0;
|
|
} else {
|
|
subbuf = wp + pat->matches[n].rm_so;
|
|
sublen = pat->matches[n].rm_eo - pat->matches[n].rm_so;
|
|
}
|
|
|
|
if (sublen > 0) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddBytes(buf, sublen, subbuf);
|
|
}
|
|
} else {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddByte(buf, *rp);
|
|
}
|
|
}
|
|
wp += pat->matches[0].rm_eo;
|
|
if (pat->flags & VAR_SUB_GLOBAL) {
|
|
flags |= REG_NOTBOL;
|
|
if (pat->matches[0].rm_so == 0 && pat->matches[0].rm_eo == 0) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddByte(buf, *wp);
|
|
wp++;
|
|
|
|
}
|
|
if (*wp)
|
|
goto tryagain;
|
|
}
|
|
if (*wp) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddBytes(buf, strlen(wp), wp);
|
|
}
|
|
break;
|
|
default:
|
|
VarREError(xrv, &pat->re, "Unexpected regex error");
|
|
/* fall through */
|
|
case REG_NOMATCH:
|
|
if (*wp) {
|
|
MAYBE_ADD_SPACE();
|
|
Buf_AddBytes(buf,strlen(wp),wp);
|
|
}
|
|
break;
|
|
}
|
|
return(addSpace||added);
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarLoopExpand --
|
|
* Implements the :@<temp>@<string>@ modifier of ODE make.
|
|
* We set the temp variable named in pattern.lhs to word and expand
|
|
* pattern.rhs storing the result in the passed buffer.
|
|
*
|
|
* Input:
|
|
* word Word to modify
|
|
* addSpace True if space should be added before
|
|
* other characters
|
|
* buf Buffer for result
|
|
* pattern Datafor substitution
|
|
*
|
|
* Results:
|
|
* TRUE if a space is needed before more characters are added.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static Boolean
|
|
VarLoopExpand(GNode *ctx __unused, Var_Parse_State *vpstate __unused,
|
|
char *word, Boolean addSpace, Buffer *buf,
|
|
void *loopp)
|
|
{
|
|
VarLoop_t *loop = (VarLoop_t *)loopp;
|
|
char *s;
|
|
int slen;
|
|
|
|
if (word && *word) {
|
|
Var_Set(loop->tvar, word, loop->ctxt, VAR_NO_EXPORT);
|
|
s = Var_Subst(NULL, loop->str, loop->ctxt, loop->errnum);
|
|
if (s != NULL && *s != '\0') {
|
|
if (addSpace && *s != '\n')
|
|
Buf_AddByte(buf, ' ');
|
|
Buf_AddBytes(buf, (slen = strlen(s)), s);
|
|
addSpace = (slen > 0 && s[slen - 1] != '\n');
|
|
free(s);
|
|
}
|
|
}
|
|
return addSpace;
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarSelectWords --
|
|
* Implements the :[start..end] modifier.
|
|
* This is a special case of VarModify since we want to be able
|
|
* to scan the list backwards if start > end.
|
|
*
|
|
* Input:
|
|
* str String whose words should be trimmed
|
|
* seldata words to select
|
|
*
|
|
* Results:
|
|
* A string of all the words selected.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarSelectWords(GNode *ctx __unused, Var_Parse_State *vpstate,
|
|
const char *str, VarSelectWords_t *seldata)
|
|
{
|
|
Buffer buf; /* Buffer for the new string */
|
|
Boolean addSpace; /* TRUE if need to add a space to the
|
|
* buffer before adding the trimmed
|
|
* word */
|
|
char **av; /* word list */
|
|
char *as; /* word list memory */
|
|
int ac, i;
|
|
int start, end, step;
|
|
|
|
Buf_Init(&buf, 0);
|
|
addSpace = FALSE;
|
|
|
|
if (vpstate->oneBigWord) {
|
|
/* fake what brk_string() would do if there were only one word */
|
|
ac = 1;
|
|
av = bmake_malloc((ac + 1) * sizeof(char *));
|
|
as = bmake_strdup(str);
|
|
av[0] = as;
|
|
av[1] = NULL;
|
|
} else {
|
|
av = brk_string(str, &ac, FALSE, &as);
|
|
}
|
|
|
|
/*
|
|
* Now sanitize seldata.
|
|
* If seldata->start or seldata->end are negative, convert them to
|
|
* the positive equivalents (-1 gets converted to argc, -2 gets
|
|
* converted to (argc-1), etc.).
|
|
*/
|
|
if (seldata->start < 0)
|
|
seldata->start = ac + seldata->start + 1;
|
|
if (seldata->end < 0)
|
|
seldata->end = ac + seldata->end + 1;
|
|
|
|
/*
|
|
* We avoid scanning more of the list than we need to.
|
|
*/
|
|
if (seldata->start > seldata->end) {
|
|
start = MIN(ac, seldata->start) - 1;
|
|
end = MAX(0, seldata->end - 1);
|
|
step = -1;
|
|
} else {
|
|
start = MAX(0, seldata->start - 1);
|
|
end = MIN(ac, seldata->end);
|
|
step = 1;
|
|
}
|
|
|
|
for (i = start;
|
|
(step < 0 && i >= end) || (step > 0 && i < end);
|
|
i += step) {
|
|
if (av[i] && *av[i]) {
|
|
if (addSpace && vpstate->varSpace) {
|
|
Buf_AddByte(&buf, vpstate->varSpace);
|
|
}
|
|
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
|
|
addSpace = TRUE;
|
|
}
|
|
}
|
|
|
|
free(as);
|
|
free(av);
|
|
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarModify --
|
|
* Modify each of the words of the passed string using the given
|
|
* function. Used to implement all modifiers.
|
|
*
|
|
* Input:
|
|
* str String whose words should be trimmed
|
|
* modProc Function to use to modify them
|
|
* datum Datum to pass it
|
|
*
|
|
* Results:
|
|
* A string of all the words modified appropriately.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarModify(GNode *ctx, Var_Parse_State *vpstate,
|
|
const char *str,
|
|
Boolean (*modProc)(GNode *, Var_Parse_State *, char *,
|
|
Boolean, Buffer *, void *),
|
|
void *datum)
|
|
{
|
|
Buffer buf; /* Buffer for the new string */
|
|
Boolean addSpace; /* TRUE if need to add a space to the
|
|
* buffer before adding the trimmed
|
|
* word */
|
|
char **av; /* word list */
|
|
char *as; /* word list memory */
|
|
int ac, i;
|
|
|
|
Buf_Init(&buf, 0);
|
|
addSpace = FALSE;
|
|
|
|
if (vpstate->oneBigWord) {
|
|
/* fake what brk_string() would do if there were only one word */
|
|
ac = 1;
|
|
av = bmake_malloc((ac + 1) * sizeof(char *));
|
|
as = bmake_strdup(str);
|
|
av[0] = as;
|
|
av[1] = NULL;
|
|
} else {
|
|
av = brk_string(str, &ac, FALSE, &as);
|
|
}
|
|
|
|
for (i = 0; i < ac; i++) {
|
|
addSpace = (*modProc)(ctx, vpstate, av[i], addSpace, &buf, datum);
|
|
}
|
|
|
|
free(as);
|
|
free(av);
|
|
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
|
|
static int
|
|
VarWordCompare(const void *a, const void *b)
|
|
{
|
|
int r = strcmp(*(const char * const *)a, *(const char * const *)b);
|
|
return r;
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarOrder --
|
|
* Order the words in the string.
|
|
*
|
|
* Input:
|
|
* str String whose words should be sorted.
|
|
* otype How to order: s - sort, x - random.
|
|
*
|
|
* Results:
|
|
* A string containing the words ordered.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarOrder(const char *str, const char otype)
|
|
{
|
|
Buffer buf; /* Buffer for the new string */
|
|
char **av; /* word list [first word does not count] */
|
|
char *as; /* word list memory */
|
|
int ac, i;
|
|
|
|
Buf_Init(&buf, 0);
|
|
|
|
av = brk_string(str, &ac, FALSE, &as);
|
|
|
|
if (ac > 0)
|
|
switch (otype) {
|
|
case 's': /* sort alphabetically */
|
|
qsort(av, ac, sizeof(char *), VarWordCompare);
|
|
break;
|
|
case 'x': /* randomize */
|
|
{
|
|
int rndidx;
|
|
char *t;
|
|
|
|
/*
|
|
* We will use [ac..2] range for mod factors. This will produce
|
|
* random numbers in [(ac-1)..0] interval, and minimal
|
|
* reasonable value for mod factor is 2 (the mod 1 will produce
|
|
* 0 with probability 1).
|
|
*/
|
|
for (i = ac-1; i > 0; i--) {
|
|
rndidx = random() % (i + 1);
|
|
if (i != rndidx) {
|
|
t = av[i];
|
|
av[i] = av[rndidx];
|
|
av[rndidx] = t;
|
|
}
|
|
}
|
|
}
|
|
} /* end of switch */
|
|
|
|
for (i = 0; i < ac; i++) {
|
|
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
|
|
if (i != ac - 1)
|
|
Buf_AddByte(&buf, ' ');
|
|
}
|
|
|
|
free(as);
|
|
free(av);
|
|
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarUniq --
|
|
* Remove adjacent duplicate words.
|
|
*
|
|
* Input:
|
|
* str String whose words should be sorted
|
|
*
|
|
* Results:
|
|
* A string containing the resulting words.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarUniq(const char *str)
|
|
{
|
|
Buffer buf; /* Buffer for new string */
|
|
char **av; /* List of words to affect */
|
|
char *as; /* Word list memory */
|
|
int ac, i, j;
|
|
|
|
Buf_Init(&buf, 0);
|
|
av = brk_string(str, &ac, FALSE, &as);
|
|
|
|
if (ac > 1) {
|
|
for (j = 0, i = 1; i < ac; i++)
|
|
if (strcmp(av[i], av[j]) != 0 && (++j != i))
|
|
av[j] = av[i];
|
|
ac = j + 1;
|
|
}
|
|
|
|
for (i = 0; i < ac; i++) {
|
|
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
|
|
if (i != ac - 1)
|
|
Buf_AddByte(&buf, ' ');
|
|
}
|
|
|
|
free(as);
|
|
free(av);
|
|
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarGetPattern --
|
|
* Pass through the tstr looking for 1) escaped delimiters,
|
|
* '$'s and backslashes (place the escaped character in
|
|
* uninterpreted) and 2) unescaped $'s that aren't before
|
|
* the delimiter (expand the variable substitution unless flags
|
|
* has VAR_NOSUBST set).
|
|
* Return the expanded string or NULL if the delimiter was missing
|
|
* If pattern is specified, handle escaped ampersands, and replace
|
|
* unescaped ampersands with the lhs of the pattern.
|
|
*
|
|
* Results:
|
|
* A string of all the words modified appropriately.
|
|
* If length is specified, return the string length of the buffer
|
|
* If flags is specified and the last character of the pattern is a
|
|
* $ set the VAR_MATCH_END bit of flags.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarGetPattern(GNode *ctxt, Var_Parse_State *vpstate __unused,
|
|
int errnum, const char **tstr, int delim, int *flags,
|
|
int *length, VarPattern *pattern)
|
|
{
|
|
const char *cp;
|
|
char *rstr;
|
|
Buffer buf;
|
|
int junk;
|
|
|
|
Buf_Init(&buf, 0);
|
|
if (length == NULL)
|
|
length = &junk;
|
|
|
|
#define IS_A_MATCH(cp, delim) \
|
|
((cp[0] == '\\') && ((cp[1] == delim) || \
|
|
(cp[1] == '\\') || (cp[1] == '$') || (pattern && (cp[1] == '&'))))
|
|
|
|
/*
|
|
* Skim through until the matching delimiter is found;
|
|
* pick up variable substitutions on the way. Also allow
|
|
* backslashes to quote the delimiter, $, and \, but don't
|
|
* touch other backslashes.
|
|
*/
|
|
for (cp = *tstr; *cp && (*cp != delim); cp++) {
|
|
if (IS_A_MATCH(cp, delim)) {
|
|
Buf_AddByte(&buf, cp[1]);
|
|
cp++;
|
|
} else if (*cp == '$') {
|
|
if (cp[1] == delim) {
|
|
if (flags == NULL)
|
|
Buf_AddByte(&buf, *cp);
|
|
else
|
|
/*
|
|
* Unescaped $ at end of pattern => anchor
|
|
* pattern at end.
|
|
*/
|
|
*flags |= VAR_MATCH_END;
|
|
} else {
|
|
if (flags == NULL || (*flags & VAR_NOSUBST) == 0) {
|
|
char *cp2;
|
|
int len;
|
|
void *freeIt;
|
|
|
|
/*
|
|
* If unescaped dollar sign not before the
|
|
* delimiter, assume it's a variable
|
|
* substitution and recurse.
|
|
*/
|
|
cp2 = Var_Parse(cp, ctxt, errnum, &len, &freeIt);
|
|
Buf_AddBytes(&buf, strlen(cp2), cp2);
|
|
if (freeIt)
|
|
free(freeIt);
|
|
cp += len - 1;
|
|
} else {
|
|
const char *cp2 = &cp[1];
|
|
|
|
if (*cp2 == PROPEN || *cp2 == BROPEN) {
|
|
/*
|
|
* Find the end of this variable reference
|
|
* and suck it in without further ado.
|
|
* It will be interperated later.
|
|
*/
|
|
int have = *cp2;
|
|
int want = (*cp2 == PROPEN) ? PRCLOSE : BRCLOSE;
|
|
int depth = 1;
|
|
|
|
for (++cp2; *cp2 != '\0' && depth > 0; ++cp2) {
|
|
if (cp2[-1] != '\\') {
|
|
if (*cp2 == have)
|
|
++depth;
|
|
if (*cp2 == want)
|
|
--depth;
|
|
}
|
|
}
|
|
Buf_AddBytes(&buf, cp2 - cp, cp);
|
|
cp = --cp2;
|
|
} else
|
|
Buf_AddByte(&buf, *cp);
|
|
}
|
|
}
|
|
}
|
|
else if (pattern && *cp == '&')
|
|
Buf_AddBytes(&buf, pattern->leftLen, pattern->lhs);
|
|
else
|
|
Buf_AddByte(&buf, *cp);
|
|
}
|
|
|
|
if (*cp != delim) {
|
|
*tstr = cp;
|
|
*length = 0;
|
|
return NULL;
|
|
}
|
|
|
|
*tstr = ++cp;
|
|
*length = Buf_Size(&buf);
|
|
rstr = Buf_Destroy(&buf, FALSE);
|
|
if (DEBUG(VAR))
|
|
fprintf(debug_file, "Modifier pattern: \"%s\"\n", rstr);
|
|
return rstr;
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarQuote --
|
|
* Quote shell meta-characters in the string
|
|
*
|
|
* Results:
|
|
* The quoted string
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarQuote(char *str)
|
|
{
|
|
|
|
Buffer buf;
|
|
/* This should cover most shells :-( */
|
|
static const char meta[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
|
|
const char *newline;
|
|
size_t len, nlen;
|
|
|
|
if ((newline = Shell_GetNewline()) == NULL)
|
|
newline = "\\\n";
|
|
nlen = strlen(newline);
|
|
|
|
Buf_Init(&buf, 0);
|
|
while (*str != '\0') {
|
|
if ((len = strcspn(str, meta)) != 0) {
|
|
Buf_AddBytes(&buf, len, str);
|
|
str += len;
|
|
} else if (*str == '\n') {
|
|
Buf_AddBytes(&buf, nlen, newline);
|
|
++str;
|
|
} else {
|
|
Buf_AddByte(&buf, '\\');
|
|
Buf_AddByte(&buf, *str);
|
|
++str;
|
|
}
|
|
}
|
|
str = Buf_Destroy(&buf, FALSE);
|
|
if (DEBUG(VAR))
|
|
fprintf(debug_file, "QuoteMeta: [%s]\n", str);
|
|
return str;
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarChangeCase --
|
|
* Change the string to all uppercase or all lowercase
|
|
*
|
|
* Input:
|
|
* str String to modify
|
|
* upper TRUE -> uppercase, else lowercase
|
|
*
|
|
* Results:
|
|
* The string with case changed
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarChangeCase(char *str, int upper)
|
|
{
|
|
Buffer buf;
|
|
int (*modProc)(int);
|
|
|
|
modProc = (upper ? toupper : tolower);
|
|
Buf_Init(&buf, 0);
|
|
for (; *str ; str++) {
|
|
Buf_AddByte(&buf, modProc(*str));
|
|
}
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
/*
|
|
* Now we need to apply any modifiers the user wants applied.
|
|
* These are:
|
|
* :M<pattern> words which match the given <pattern>.
|
|
* <pattern> is of the standard file
|
|
* wildcarding form.
|
|
* :N<pattern> words which do not match the given <pattern>.
|
|
* :S<d><pat1><d><pat2><d>[1gW]
|
|
* Substitute <pat2> for <pat1> in the value
|
|
* :C<d><pat1><d><pat2><d>[1gW]
|
|
* Substitute <pat2> for regex <pat1> in the value
|
|
* :H Substitute the head of each word
|
|
* :T Substitute the tail of each word
|
|
* :E Substitute the extension (minus '.') of
|
|
* each word
|
|
* :R Substitute the root of each word
|
|
* (pathname minus the suffix).
|
|
* :O ("Order") Alphabeticaly sort words in variable.
|
|
* :Ox ("intermiX") Randomize words in variable.
|
|
* :u ("uniq") Remove adjacent duplicate words.
|
|
* :tu Converts the variable contents to uppercase.
|
|
* :tl Converts the variable contents to lowercase.
|
|
* :ts[c] Sets varSpace - the char used to
|
|
* separate words to 'c'. If 'c' is
|
|
* omitted then no separation is used.
|
|
* :tW Treat the variable contents as a single
|
|
* word, even if it contains spaces.
|
|
* (Mnemonic: one big 'W'ord.)
|
|
* :tw Treat the variable contents as multiple
|
|
* space-separated words.
|
|
* (Mnemonic: many small 'w'ords.)
|
|
* :[index] Select a single word from the value.
|
|
* :[start..end] Select multiple words from the value.
|
|
* :[*] or :[0] Select the entire value, as a single
|
|
* word. Equivalent to :tW.
|
|
* :[@] Select the entire value, as multiple
|
|
* words. Undoes the effect of :[*].
|
|
* Equivalent to :tw.
|
|
* :[#] Returns the number of words in the value.
|
|
*
|
|
* :?<true-value>:<false-value>
|
|
* If the variable evaluates to true, return
|
|
* true value, else return the second value.
|
|
* :lhs=rhs Like :S, but the rhs goes to the end of
|
|
* the invocation.
|
|
* :sh Treat the current value as a command
|
|
* to be run, new value is its output.
|
|
* The following added so we can handle ODE makefiles.
|
|
* :@<tmpvar>@<newval>@
|
|
* Assign a temporary local variable <tmpvar>
|
|
* to the current value of each word in turn
|
|
* and replace each word with the result of
|
|
* evaluating <newval>
|
|
* :D<newval> Use <newval> as value if variable defined
|
|
* :U<newval> Use <newval> as value if variable undefined
|
|
* :L Use the name of the variable as the value.
|
|
* :P Use the path of the node that has the same
|
|
* name as the variable as the value. This
|
|
* basically includes an implied :L so that
|
|
* the common method of refering to the path
|
|
* of your dependent 'x' in a rule is to use
|
|
* the form '${x:P}'.
|
|
* :!<cmd>! Run cmd much the same as :sh run's the
|
|
* current value of the variable.
|
|
* The ::= modifiers, actually assign a value to the variable.
|
|
* Their main purpose is in supporting modifiers of .for loop
|
|
* iterators and other obscure uses. They always expand to
|
|
* nothing. In a target rule that would otherwise expand to an
|
|
* empty line they can be preceded with @: to keep make happy.
|
|
* Eg.
|
|
*
|
|
* foo: .USE
|
|
* .for i in ${.TARGET} ${.TARGET:R}.gz
|
|
* @: ${t::=$i}
|
|
* @echo blah ${t:T}
|
|
* .endfor
|
|
*
|
|
* ::=<str> Assigns <str> as the new value of variable.
|
|
* ::?=<str> Assigns <str> as value of variable if
|
|
* it was not already set.
|
|
* ::+=<str> Appends <str> to variable.
|
|
* ::!=<cmd> Assigns output of <cmd> as the new value of
|
|
* variable.
|
|
*/
|
|
|
|
static char *
|
|
ApplyModifiers(char *nstr, const char *tstr,
|
|
int startc, int endc,
|
|
Var *v, GNode *ctxt, Boolean errnum,
|
|
int *lengthPtr, void **freePtr)
|
|
{
|
|
const char *start;
|
|
const char *cp; /* Secondary pointer into str (place marker
|
|
* for tstr) */
|
|
char *newStr; /* New value to return */
|
|
char termc; /* Character which terminated scan */
|
|
int cnt; /* Used to count brace pairs when variable in
|
|
* in parens or braces */
|
|
char delim;
|
|
int modifier; /* that we are processing */
|
|
Var_Parse_State parsestate; /* Flags passed to helper functions */
|
|
|
|
delim = '\0';
|
|
parsestate.oneBigWord = FALSE;
|
|
parsestate.varSpace = ' '; /* word separator */
|
|
|
|
start = cp = tstr;
|
|
|
|
while (*tstr && *tstr != endc) {
|
|
|
|
if (*tstr == '$') {
|
|
/*
|
|
* We have some complex modifiers in a variable.
|
|
*/
|
|
void *freeIt;
|
|
char *rval;
|
|
int rlen;
|
|
|
|
rval = Var_Parse(tstr, ctxt, errnum, &rlen, &freeIt);
|
|
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "Got '%s' from '%.*s'%.*s\n",
|
|
rval, rlen, tstr, rlen, tstr + rlen);
|
|
}
|
|
|
|
tstr += rlen;
|
|
|
|
if (rval != NULL && *rval) {
|
|
int used;
|
|
|
|
nstr = ApplyModifiers(nstr, rval,
|
|
0, 0,
|
|
v, ctxt, errnum, &used, freePtr);
|
|
if (nstr == var_Error
|
|
|| (nstr == varNoError && errnum == 0)
|
|
|| strlen(rval) != (size_t) used) {
|
|
if (freeIt)
|
|
free(freeIt);
|
|
goto out; /* error already reported */
|
|
}
|
|
}
|
|
if (freeIt)
|
|
free(freeIt);
|
|
if (*tstr == ':')
|
|
tstr++;
|
|
else if (!*tstr && endc) {
|
|
Error("Unclosed variable specification after complex modifier (expecting '%c') for %s", endc, v->name);
|
|
goto out;
|
|
}
|
|
continue;
|
|
}
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "Applying :%c to \"%s\"\n", *tstr, nstr);
|
|
}
|
|
newStr = var_Error;
|
|
switch ((modifier = *tstr)) {
|
|
case ':':
|
|
{
|
|
if (tstr[1] == '=' ||
|
|
(tstr[2] == '=' &&
|
|
(tstr[1] == '!' || tstr[1] == '+' || tstr[1] == '?'))) {
|
|
/*
|
|
* "::=", "::!=", "::+=", or "::?="
|
|
*/
|
|
GNode *v_ctxt; /* context where v belongs */
|
|
const char *emsg;
|
|
char *sv_name;
|
|
VarPattern pattern;
|
|
int how;
|
|
|
|
if (v->name[0] == 0)
|
|
goto bad_modifier;
|
|
|
|
v_ctxt = ctxt;
|
|
sv_name = NULL;
|
|
++tstr;
|
|
if (v->flags & VAR_JUNK) {
|
|
/*
|
|
* We need to bmake_strdup() it incase
|
|
* VarGetPattern() recurses.
|
|
*/
|
|
sv_name = v->name;
|
|
v->name = bmake_strdup(v->name);
|
|
} else if (ctxt != VAR_GLOBAL) {
|
|
Var *gv = VarFind(v->name, ctxt, 0);
|
|
if (gv == NULL)
|
|
v_ctxt = VAR_GLOBAL;
|
|
else
|
|
VarFreeEnv(gv, TRUE);
|
|
}
|
|
|
|
switch ((how = *tstr)) {
|
|
case '+':
|
|
case '?':
|
|
case '!':
|
|
cp = &tstr[2];
|
|
break;
|
|
default:
|
|
cp = ++tstr;
|
|
break;
|
|
}
|
|
delim = BRCLOSE;
|
|
pattern.flags = 0;
|
|
|
|
pattern.rhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim, NULL,
|
|
&pattern.rightLen,
|
|
NULL);
|
|
if (v->flags & VAR_JUNK) {
|
|
/* restore original name */
|
|
free(v->name);
|
|
v->name = sv_name;
|
|
}
|
|
if (pattern.rhs == NULL)
|
|
goto cleanup;
|
|
|
|
termc = *--cp;
|
|
delim = '\0';
|
|
|
|
switch (how) {
|
|
case '+':
|
|
Var_Append(v->name, pattern.rhs, v_ctxt);
|
|
break;
|
|
case '!':
|
|
newStr = Cmd_Exec(pattern.rhs, &emsg);
|
|
if (emsg)
|
|
Error(emsg, nstr);
|
|
else
|
|
Var_Set(v->name, newStr, v_ctxt, 0);
|
|
if (newStr)
|
|
free(newStr);
|
|
break;
|
|
case '?':
|
|
if ((v->flags & VAR_JUNK) == 0)
|
|
break;
|
|
/* FALLTHROUGH */
|
|
default:
|
|
Var_Set(v->name, pattern.rhs, v_ctxt, 0);
|
|
break;
|
|
}
|
|
free(UNCONST(pattern.rhs));
|
|
newStr = var_Error;
|
|
break;
|
|
}
|
|
goto default_case; /* "::<unrecognised>" */
|
|
}
|
|
case '@':
|
|
{
|
|
VarLoop_t loop;
|
|
int flags = VAR_NOSUBST;
|
|
|
|
cp = ++tstr;
|
|
delim = '@';
|
|
if ((loop.tvar = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim,
|
|
&flags, &loop.tvarLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
if ((loop.str = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim,
|
|
&flags, &loop.strLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
termc = *cp;
|
|
delim = '\0';
|
|
|
|
loop.errnum = errnum;
|
|
loop.ctxt = ctxt;
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarLoopExpand,
|
|
&loop);
|
|
free(loop.tvar);
|
|
free(loop.str);
|
|
break;
|
|
}
|
|
case 'D':
|
|
case 'U':
|
|
{
|
|
Buffer buf; /* Buffer for patterns */
|
|
int wantit; /* want data in buffer */
|
|
|
|
/*
|
|
* Pass through tstr looking for 1) escaped delimiters,
|
|
* '$'s and backslashes (place the escaped character in
|
|
* uninterpreted) and 2) unescaped $'s that aren't before
|
|
* the delimiter (expand the variable substitution).
|
|
* The result is left in the Buffer buf.
|
|
*/
|
|
Buf_Init(&buf, 0);
|
|
for (cp = tstr + 1;
|
|
*cp != endc && *cp != ':' && *cp != '\0';
|
|
cp++) {
|
|
if ((*cp == '\\') &&
|
|
((cp[1] == ':') ||
|
|
(cp[1] == '$') ||
|
|
(cp[1] == endc) ||
|
|
(cp[1] == '\\')))
|
|
{
|
|
Buf_AddByte(&buf, cp[1]);
|
|
cp++;
|
|
} else if (*cp == '$') {
|
|
/*
|
|
* If unescaped dollar sign, assume it's a
|
|
* variable substitution and recurse.
|
|
*/
|
|
char *cp2;
|
|
int len;
|
|
void *freeIt;
|
|
|
|
cp2 = Var_Parse(cp, ctxt, errnum, &len, &freeIt);
|
|
Buf_AddBytes(&buf, strlen(cp2), cp2);
|
|
if (freeIt)
|
|
free(freeIt);
|
|
cp += len - 1;
|
|
} else {
|
|
Buf_AddByte(&buf, *cp);
|
|
}
|
|
}
|
|
|
|
termc = *cp;
|
|
|
|
if (*tstr == 'U')
|
|
wantit = ((v->flags & VAR_JUNK) != 0);
|
|
else
|
|
wantit = ((v->flags & VAR_JUNK) == 0);
|
|
if ((v->flags & VAR_JUNK) != 0)
|
|
v->flags |= VAR_KEEP;
|
|
if (wantit) {
|
|
newStr = Buf_Destroy(&buf, FALSE);
|
|
} else {
|
|
newStr = nstr;
|
|
Buf_Destroy(&buf, TRUE);
|
|
}
|
|
break;
|
|
}
|
|
case 'L':
|
|
{
|
|
if ((v->flags & VAR_JUNK) != 0)
|
|
v->flags |= VAR_KEEP;
|
|
newStr = bmake_strdup(v->name);
|
|
cp = ++tstr;
|
|
termc = *tstr;
|
|
break;
|
|
}
|
|
case 'P':
|
|
{
|
|
GNode *gn;
|
|
|
|
if ((v->flags & VAR_JUNK) != 0)
|
|
v->flags |= VAR_KEEP;
|
|
gn = Targ_FindNode(v->name, TARG_NOCREATE);
|
|
if (gn == NULL || gn->type & OP_NOPATH) {
|
|
newStr = NULL;
|
|
} else if (gn->path) {
|
|
newStr = bmake_strdup(gn->path);
|
|
} else {
|
|
newStr = Dir_FindFile(v->name, Suff_FindPath(gn));
|
|
}
|
|
if (!newStr) {
|
|
newStr = bmake_strdup(v->name);
|
|
}
|
|
cp = ++tstr;
|
|
termc = *tstr;
|
|
break;
|
|
}
|
|
case '!':
|
|
{
|
|
const char *emsg;
|
|
VarPattern pattern;
|
|
pattern.flags = 0;
|
|
|
|
delim = '!';
|
|
|
|
cp = ++tstr;
|
|
if ((pattern.rhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim,
|
|
NULL, &pattern.rightLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
newStr = Cmd_Exec(pattern.rhs, &emsg);
|
|
free(UNCONST(pattern.rhs));
|
|
if (emsg)
|
|
Error(emsg, nstr);
|
|
termc = *cp;
|
|
delim = '\0';
|
|
if (v->flags & VAR_JUNK) {
|
|
v->flags |= VAR_KEEP;
|
|
}
|
|
break;
|
|
}
|
|
case '[':
|
|
{
|
|
/*
|
|
* Look for the closing ']', recursively
|
|
* expanding any embedded variables.
|
|
*
|
|
* estr is a pointer to the expanded result,
|
|
* which we must free().
|
|
*/
|
|
char *estr;
|
|
|
|
cp = tstr+1; /* point to char after '[' */
|
|
delim = ']'; /* look for closing ']' */
|
|
estr = VarGetPattern(ctxt, &parsestate,
|
|
errnum, &cp, delim,
|
|
NULL, NULL, NULL);
|
|
if (estr == NULL)
|
|
goto cleanup; /* report missing ']' */
|
|
/* now cp points just after the closing ']' */
|
|
delim = '\0';
|
|
if (cp[0] != ':' && cp[0] != endc) {
|
|
/* Found junk after ']' */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
}
|
|
if (estr[0] == '\0') {
|
|
/* Found empty square brackets in ":[]". */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
} else if (estr[0] == '#' && estr[1] == '\0') {
|
|
/* Found ":[#]" */
|
|
|
|
/*
|
|
* We will need enough space for the decimal
|
|
* representation of an int. We calculate the
|
|
* space needed for the octal representation,
|
|
* and add enough slop to cope with a '-' sign
|
|
* (which should never be needed) and a '\0'
|
|
* string terminator.
|
|
*/
|
|
int newStrSize =
|
|
(sizeof(int) * CHAR_BIT + 2) / 3 + 2;
|
|
|
|
newStr = bmake_malloc(newStrSize);
|
|
if (parsestate.oneBigWord) {
|
|
strncpy(newStr, "1", newStrSize);
|
|
} else {
|
|
/* XXX: brk_string() is a rather expensive
|
|
* way of counting words. */
|
|
char **av;
|
|
char *as;
|
|
int ac;
|
|
|
|
av = brk_string(nstr, &ac, FALSE, &as);
|
|
snprintf(newStr, newStrSize, "%d", ac);
|
|
free(as);
|
|
free(av);
|
|
}
|
|
termc = *cp;
|
|
free(estr);
|
|
break;
|
|
} else if (estr[0] == '*' && estr[1] == '\0') {
|
|
/* Found ":[*]" */
|
|
parsestate.oneBigWord = TRUE;
|
|
newStr = nstr;
|
|
termc = *cp;
|
|
free(estr);
|
|
break;
|
|
} else if (estr[0] == '@' && estr[1] == '\0') {
|
|
/* Found ":[@]" */
|
|
parsestate.oneBigWord = FALSE;
|
|
newStr = nstr;
|
|
termc = *cp;
|
|
free(estr);
|
|
break;
|
|
} else {
|
|
/*
|
|
* We expect estr to contain a single
|
|
* integer for :[N], or two integers
|
|
* separated by ".." for :[start..end].
|
|
*/
|
|
char *ep;
|
|
|
|
VarSelectWords_t seldata = { 0, 0 };
|
|
|
|
seldata.start = strtol(estr, &ep, 0);
|
|
if (ep == estr) {
|
|
/* Found junk instead of a number */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
} else if (ep[0] == '\0') {
|
|
/* Found only one integer in :[N] */
|
|
seldata.end = seldata.start;
|
|
} else if (ep[0] == '.' && ep[1] == '.' &&
|
|
ep[2] != '\0') {
|
|
/* Expecting another integer after ".." */
|
|
ep += 2;
|
|
seldata.end = strtol(ep, &ep, 0);
|
|
if (ep[0] != '\0') {
|
|
/* Found junk after ".." */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
}
|
|
} else {
|
|
/* Found junk instead of ".." */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
}
|
|
/*
|
|
* Now seldata is properly filled in,
|
|
* but we still have to check for 0 as
|
|
* a special case.
|
|
*/
|
|
if (seldata.start == 0 && seldata.end == 0) {
|
|
/* ":[0]" or perhaps ":[0..0]" */
|
|
parsestate.oneBigWord = TRUE;
|
|
newStr = nstr;
|
|
termc = *cp;
|
|
free(estr);
|
|
break;
|
|
} else if (seldata.start == 0 ||
|
|
seldata.end == 0) {
|
|
/* ":[0..N]" or ":[N..0]" */
|
|
free(estr);
|
|
goto bad_modifier;
|
|
}
|
|
/*
|
|
* Normal case: select the words
|
|
* described by seldata.
|
|
*/
|
|
newStr = VarSelectWords(ctxt, &parsestate,
|
|
nstr, &seldata);
|
|
|
|
termc = *cp;
|
|
free(estr);
|
|
break;
|
|
}
|
|
|
|
}
|
|
case 't':
|
|
{
|
|
cp = tstr + 1; /* make sure it is set */
|
|
if (tstr[1] != endc && tstr[1] != ':') {
|
|
if (tstr[1] == 's') {
|
|
/*
|
|
* Use the char (if any) at tstr[2]
|
|
* as the word separator.
|
|
*/
|
|
VarPattern pattern;
|
|
|
|
if (tstr[2] != endc &&
|
|
(tstr[3] == endc || tstr[3] == ':')) {
|
|
/* ":ts<unrecognised><endc>" or
|
|
* ":ts<unrecognised>:" */
|
|
parsestate.varSpace = tstr[2];
|
|
cp = tstr + 3;
|
|
} else if (tstr[2] == endc || tstr[2] == ':') {
|
|
/* ":ts<endc>" or ":ts:" */
|
|
parsestate.varSpace = 0; /* no separator */
|
|
cp = tstr + 2;
|
|
} else if (tstr[2] == '\\') {
|
|
switch (tstr[3]) {
|
|
case 'n':
|
|
parsestate.varSpace = '\n';
|
|
cp = tstr + 4;
|
|
break;
|
|
case 't':
|
|
parsestate.varSpace = '\t';
|
|
cp = tstr + 4;
|
|
break;
|
|
default:
|
|
if (isdigit((unsigned char)tstr[3])) {
|
|
char *ep;
|
|
|
|
parsestate.varSpace =
|
|
strtoul(&tstr[3], &ep, 0);
|
|
if (*ep != ':' && *ep != endc)
|
|
goto bad_modifier;
|
|
cp = ep;
|
|
} else {
|
|
/*
|
|
* ":ts<backslash><unrecognised>".
|
|
*/
|
|
goto bad_modifier;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
/*
|
|
* Found ":ts<unrecognised><unrecognised>".
|
|
*/
|
|
goto bad_modifier;
|
|
}
|
|
|
|
termc = *cp;
|
|
|
|
/*
|
|
* We cannot be certain that VarModify
|
|
* will be used - even if there is a
|
|
* subsequent modifier, so do a no-op
|
|
* VarSubstitute now to for str to be
|
|
* re-expanded without the spaces.
|
|
*/
|
|
pattern.flags = VAR_SUB_ONE;
|
|
pattern.lhs = pattern.rhs = "\032";
|
|
pattern.leftLen = pattern.rightLen = 1;
|
|
|
|
newStr = VarModify(ctxt, &parsestate, nstr,
|
|
VarSubstitute,
|
|
&pattern);
|
|
} else if (tstr[2] == endc || tstr[2] == ':') {
|
|
/*
|
|
* Check for two-character options:
|
|
* ":tu", ":tl"
|
|
*/
|
|
if (tstr[1] == 'u' || tstr[1] == 'l') {
|
|
newStr = VarChangeCase(nstr, (tstr[1] == 'u'));
|
|
cp = tstr + 2;
|
|
termc = *cp;
|
|
} else if (tstr[1] == 'W' || tstr[1] == 'w') {
|
|
parsestate.oneBigWord = (tstr[1] == 'W');
|
|
newStr = nstr;
|
|
cp = tstr + 2;
|
|
termc = *cp;
|
|
} else {
|
|
/* Found ":t<unrecognised>:" or
|
|
* ":t<unrecognised><endc>". */
|
|
goto bad_modifier;
|
|
}
|
|
} else {
|
|
/*
|
|
* Found ":t<unrecognised><unrecognised>".
|
|
*/
|
|
goto bad_modifier;
|
|
}
|
|
} else {
|
|
/*
|
|
* Found ":t<endc>" or ":t:".
|
|
*/
|
|
goto bad_modifier;
|
|
}
|
|
break;
|
|
}
|
|
case 'N':
|
|
case 'M':
|
|
{
|
|
char *pattern;
|
|
const char *endpat; /* points just after end of pattern */
|
|
char *cp2;
|
|
Boolean copy; /* pattern should be, or has been, copied */
|
|
int nest;
|
|
|
|
copy = FALSE;
|
|
nest = 1;
|
|
/*
|
|
* In the loop below, ignore ':' unless we are at
|
|
* (or back to) the original brace level.
|
|
* XXX This will likely not work right if $() and ${}
|
|
* are intermixed.
|
|
*/
|
|
for (cp = tstr + 1;
|
|
*cp != '\0' && !(*cp == ':' && nest == 1);
|
|
cp++)
|
|
{
|
|
if (*cp == '\\' &&
|
|
(cp[1] == ':' ||
|
|
cp[1] == endc || cp[1] == startc)) {
|
|
copy = TRUE;
|
|
cp++;
|
|
continue;
|
|
}
|
|
if (*cp == '(' || *cp == '{')
|
|
++nest;
|
|
if (*cp == ')' || *cp == '}') {
|
|
--nest;
|
|
if (nest == 0)
|
|
break;
|
|
}
|
|
}
|
|
termc = *cp;
|
|
endpat = cp;
|
|
if (copy) {
|
|
/*
|
|
* Need to compress the \:'s out of the pattern, so
|
|
* allocate enough room to hold the uncompressed
|
|
* pattern (note that cp started at tstr+1, so
|
|
* cp - tstr takes the null byte into account) and
|
|
* compress the pattern into the space.
|
|
*/
|
|
pattern = bmake_malloc(cp - tstr);
|
|
for (cp2 = pattern, cp = tstr + 1;
|
|
cp < endpat;
|
|
cp++, cp2++)
|
|
{
|
|
if ((*cp == '\\') && (cp+1 < endpat) &&
|
|
(cp[1] == ':' || cp[1] == endc)) {
|
|
cp++;
|
|
}
|
|
*cp2 = *cp;
|
|
}
|
|
*cp2 = '\0';
|
|
endpat = cp2;
|
|
} else {
|
|
/*
|
|
* Either Var_Subst or VarModify will need a
|
|
* nul-terminated string soon, so construct one now.
|
|
*/
|
|
pattern = bmake_strndup(tstr+1, endpat - (tstr + 1));
|
|
}
|
|
if (strchr(pattern, '$') != NULL) {
|
|
/*
|
|
* pattern contains embedded '$', so use Var_Subst to
|
|
* expand it.
|
|
*/
|
|
cp2 = pattern;
|
|
pattern = Var_Subst(NULL, cp2, ctxt, errnum);
|
|
free(cp2);
|
|
}
|
|
if (DEBUG(VAR))
|
|
fprintf(debug_file, "Pattern for [%s] is [%s]\n", nstr,
|
|
pattern);
|
|
if (*tstr == 'M') {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarMatch,
|
|
pattern);
|
|
} else {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarNoMatch,
|
|
pattern);
|
|
}
|
|
free(pattern);
|
|
break;
|
|
}
|
|
case 'S':
|
|
{
|
|
VarPattern pattern;
|
|
Var_Parse_State tmpparsestate;
|
|
|
|
pattern.flags = 0;
|
|
tmpparsestate = parsestate;
|
|
delim = tstr[1];
|
|
tstr += 2;
|
|
|
|
/*
|
|
* If pattern begins with '^', it is anchored to the
|
|
* start of the word -- skip over it and flag pattern.
|
|
*/
|
|
if (*tstr == '^') {
|
|
pattern.flags |= VAR_MATCH_START;
|
|
tstr += 1;
|
|
}
|
|
|
|
cp = tstr;
|
|
if ((pattern.lhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim,
|
|
&pattern.flags,
|
|
&pattern.leftLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
if ((pattern.rhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim, NULL,
|
|
&pattern.rightLen,
|
|
&pattern)) == NULL)
|
|
goto cleanup;
|
|
|
|
/*
|
|
* Check for global substitution. If 'g' after the final
|
|
* delimiter, substitution is global and is marked that
|
|
* way.
|
|
*/
|
|
for (;; cp++) {
|
|
switch (*cp) {
|
|
case 'g':
|
|
pattern.flags |= VAR_SUB_GLOBAL;
|
|
continue;
|
|
case '1':
|
|
pattern.flags |= VAR_SUB_ONE;
|
|
continue;
|
|
case 'W':
|
|
tmpparsestate.oneBigWord = TRUE;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
termc = *cp;
|
|
newStr = VarModify(ctxt, &tmpparsestate, nstr,
|
|
VarSubstitute,
|
|
&pattern);
|
|
|
|
/*
|
|
* Free the two strings.
|
|
*/
|
|
free(UNCONST(pattern.lhs));
|
|
free(UNCONST(pattern.rhs));
|
|
delim = '\0';
|
|
break;
|
|
}
|
|
case '?':
|
|
{
|
|
VarPattern pattern;
|
|
Boolean value;
|
|
|
|
/* find ':', and then substitute accordingly */
|
|
|
|
pattern.flags = 0;
|
|
|
|
cp = ++tstr;
|
|
delim = ':';
|
|
if ((pattern.lhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim, NULL,
|
|
&pattern.leftLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
/* BROPEN or PROPEN */
|
|
delim = endc;
|
|
if ((pattern.rhs = VarGetPattern(ctxt, &parsestate, errnum,
|
|
&cp, delim, NULL,
|
|
&pattern.rightLen,
|
|
NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
termc = *--cp;
|
|
delim = '\0';
|
|
if (Cond_EvalExpression(NULL, v->name, &value, 0)
|
|
== COND_INVALID) {
|
|
Error("Bad conditional expression `%s' in %s?%s:%s",
|
|
v->name, v->name, pattern.lhs, pattern.rhs);
|
|
goto cleanup;
|
|
}
|
|
|
|
if (value) {
|
|
newStr = UNCONST(pattern.lhs);
|
|
free(UNCONST(pattern.rhs));
|
|
} else {
|
|
newStr = UNCONST(pattern.rhs);
|
|
free(UNCONST(pattern.lhs));
|
|
}
|
|
if (v->flags & VAR_JUNK) {
|
|
v->flags |= VAR_KEEP;
|
|
}
|
|
break;
|
|
}
|
|
#ifndef NO_REGEX
|
|
case 'C':
|
|
{
|
|
VarREPattern pattern;
|
|
char *re;
|
|
int error;
|
|
Var_Parse_State tmpparsestate;
|
|
|
|
pattern.flags = 0;
|
|
tmpparsestate = parsestate;
|
|
delim = tstr[1];
|
|
tstr += 2;
|
|
|
|
cp = tstr;
|
|
|
|
if ((re = VarGetPattern(ctxt, &parsestate, errnum, &cp, delim,
|
|
NULL, NULL, NULL)) == NULL)
|
|
goto cleanup;
|
|
|
|
if ((pattern.replace = VarGetPattern(ctxt, &parsestate,
|
|
errnum, &cp, delim, NULL,
|
|
NULL, NULL)) == NULL){
|
|
free(re);
|
|
goto cleanup;
|
|
}
|
|
|
|
for (;; cp++) {
|
|
switch (*cp) {
|
|
case 'g':
|
|
pattern.flags |= VAR_SUB_GLOBAL;
|
|
continue;
|
|
case '1':
|
|
pattern.flags |= VAR_SUB_ONE;
|
|
continue;
|
|
case 'W':
|
|
tmpparsestate.oneBigWord = TRUE;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
termc = *cp;
|
|
|
|
error = regcomp(&pattern.re, re, REG_EXTENDED);
|
|
free(re);
|
|
if (error) {
|
|
*lengthPtr = cp - start + 1;
|
|
VarREError(error, &pattern.re, "RE substitution error");
|
|
free(pattern.replace);
|
|
goto cleanup;
|
|
}
|
|
|
|
pattern.nsub = pattern.re.re_nsub + 1;
|
|
if (pattern.nsub < 1)
|
|
pattern.nsub = 1;
|
|
if (pattern.nsub > 10)
|
|
pattern.nsub = 10;
|
|
pattern.matches = bmake_malloc(pattern.nsub *
|
|
sizeof(regmatch_t));
|
|
newStr = VarModify(ctxt, &tmpparsestate, nstr,
|
|
VarRESubstitute,
|
|
&pattern);
|
|
regfree(&pattern.re);
|
|
free(pattern.replace);
|
|
free(pattern.matches);
|
|
delim = '\0';
|
|
break;
|
|
}
|
|
#endif
|
|
case 'Q':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarQuote(nstr);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
case 'T':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarTail,
|
|
NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
case 'H':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarHead,
|
|
NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
case 'E':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarSuffix,
|
|
NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
case 'R':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(ctxt, &parsestate, nstr, VarRoot,
|
|
NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
case 'O':
|
|
{
|
|
char otype;
|
|
|
|
cp = tstr + 1; /* skip to the rest in any case */
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
otype = 's';
|
|
termc = *cp;
|
|
} else if ( (tstr[1] == 'x') &&
|
|
(tstr[2] == endc || tstr[2] == ':') ) {
|
|
otype = tstr[1];
|
|
cp = tstr + 2;
|
|
termc = *cp;
|
|
} else {
|
|
goto bad_modifier;
|
|
}
|
|
newStr = VarOrder(nstr, otype);
|
|
break;
|
|
}
|
|
case 'u':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarUniq(nstr);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
#ifdef SUNSHCMD
|
|
case 's':
|
|
if (tstr[1] == 'h' && (tstr[2] == endc || tstr[2] == ':')) {
|
|
const char *emsg;
|
|
newStr = Cmd_Exec(nstr, &emsg);
|
|
if (emsg)
|
|
Error(emsg, nstr);
|
|
cp = tstr + 2;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
goto default_case;
|
|
#endif
|
|
default:
|
|
default_case:
|
|
{
|
|
#ifdef SYSVVARSUB
|
|
/*
|
|
* This can either be a bogus modifier or a System-V
|
|
* substitution command.
|
|
*/
|
|
VarPattern pattern;
|
|
Boolean eqFound;
|
|
|
|
pattern.flags = 0;
|
|
eqFound = FALSE;
|
|
/*
|
|
* First we make a pass through the string trying
|
|
* to verify it is a SYSV-make-style translation:
|
|
* it must be: <string1>=<string2>)
|
|
*/
|
|
cp = tstr;
|
|
cnt = 1;
|
|
while (*cp != '\0' && cnt) {
|
|
if (*cp == '=') {
|
|
eqFound = TRUE;
|
|
/* continue looking for endc */
|
|
}
|
|
else if (*cp == endc)
|
|
cnt--;
|
|
else if (*cp == startc)
|
|
cnt++;
|
|
if (cnt)
|
|
cp++;
|
|
}
|
|
if (*cp == endc && eqFound) {
|
|
|
|
/*
|
|
* Now we break this sucker into the lhs and
|
|
* rhs. We must null terminate them of course.
|
|
*/
|
|
delim='=';
|
|
cp = tstr;
|
|
if ((pattern.lhs = VarGetPattern(ctxt, &parsestate,
|
|
errnum, &cp, delim, &pattern.flags,
|
|
&pattern.leftLen, NULL)) == NULL)
|
|
goto cleanup;
|
|
delim = endc;
|
|
if ((pattern.rhs = VarGetPattern(ctxt, &parsestate,
|
|
errnum, &cp, delim, NULL, &pattern.rightLen,
|
|
&pattern)) == NULL)
|
|
goto cleanup;
|
|
|
|
/*
|
|
* SYSV modifications happen through the whole
|
|
* string. Note the pattern is anchored at the end.
|
|
*/
|
|
termc = *--cp;
|
|
delim = '\0';
|
|
newStr = VarModify(ctxt, &parsestate, nstr,
|
|
VarSYSVMatch,
|
|
&pattern);
|
|
free(UNCONST(pattern.lhs));
|
|
free(UNCONST(pattern.rhs));
|
|
} else
|
|
#endif
|
|
{
|
|
Error("Unknown modifier '%c'", *tstr);
|
|
for (cp = tstr+1;
|
|
*cp != ':' && *cp != endc && *cp != '\0';
|
|
cp++)
|
|
continue;
|
|
termc = *cp;
|
|
newStr = var_Error;
|
|
}
|
|
}
|
|
}
|
|
if (DEBUG(VAR)) {
|
|
fprintf(debug_file, "Result of :%c is \"%s\"\n", modifier, newStr);
|
|
}
|
|
|
|
if (newStr != nstr) {
|
|
if (*freePtr) {
|
|
free(nstr);
|
|
*freePtr = NULL;
|
|
}
|
|
nstr = newStr;
|
|
if (nstr != var_Error && nstr != varNoError) {
|
|
*freePtr = nstr;
|
|
}
|
|
}
|
|
if (termc == '\0' && endc != '\0') {
|
|
Error("Unclosed variable specification (expecting '%c') for \"%s\" (value \"%s\") modifier %c", endc, v->name, nstr, modifier);
|
|
} else if (termc == ':') {
|
|
cp++;
|
|
}
|
|
tstr = cp;
|
|
}
|
|
out:
|
|
*lengthPtr = tstr - start;
|
|
return (nstr);
|
|
|
|
bad_modifier:
|
|
/* "{(" */
|
|
Error("Bad modifier `:%.*s' for %s", (int)strcspn(tstr, ":)}"), tstr,
|
|
v->name);
|
|
|
|
cleanup:
|
|
*lengthPtr = cp - start;
|
|
if (delim != '\0')
|
|
Error("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
if (*freePtr) {
|
|
free(*freePtr);
|
|
*freePtr = NULL;
|
|
}
|
|
return (var_Error);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Parse --
|
|
* Given the start of a variable invocation, extract the variable
|
|
* name and find its value, then modify it according to the
|
|
* specification.
|
|
*
|
|
* Input:
|
|
* str The string to parse
|
|
* ctxt The context for the variable
|
|
* errnum TRUE if undefined variables are an error
|
|
* lengthPtr OUT: The length of the specification
|
|
* freePtr OUT: Non-NULL if caller should free *freePtr
|
|
*
|
|
* Results:
|
|
* The (possibly-modified) value of the variable or var_Error if the
|
|
* specification is invalid. The length of the specification is
|
|
* placed in *lengthPtr (for invalid specifications, this is just
|
|
* 2...?).
|
|
* If *freePtr is non-NULL then it's a pointer that the caller
|
|
* should pass to free() to free memory used by the result.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
/* coverity[+alloc : arg-*4] */
|
|
char *
|
|
Var_Parse(const char *str, GNode *ctxt, Boolean errnum, int *lengthPtr,
|
|
void **freePtr)
|
|
{
|
|
const char *tstr; /* Pointer into str */
|
|
Var *v; /* Variable in invocation */
|
|
Boolean haveModifier;/* TRUE if have modifiers for the variable */
|
|
char endc; /* Ending character when variable in parens
|
|
* or braces */
|
|
char startc; /* Starting character when variable in parens
|
|
* or braces */
|
|
int vlen; /* Length of variable name */
|
|
const char *start; /* Points to original start of str */
|
|
char *nstr; /* New string, used during expansion */
|
|
Boolean dynamic; /* TRUE if the variable is local and we're
|
|
* expanding it in a non-local context. This
|
|
* is done to support dynamic sources. The
|
|
* result is just the invocation, unaltered */
|
|
Var_Parse_State parsestate; /* Flags passed to helper functions */
|
|
char name[2];
|
|
|
|
*freePtr = NULL;
|
|
dynamic = FALSE;
|
|
start = str;
|
|
parsestate.oneBigWord = FALSE;
|
|
parsestate.varSpace = ' '; /* word separator */
|
|
|
|
startc = str[1];
|
|
if (startc != PROPEN && startc != BROPEN) {
|
|
/*
|
|
* If it's not bounded by braces of some sort, life is much simpler.
|
|
* We just need to check for the first character and return the
|
|
* value if it exists.
|
|
*/
|
|
|
|
/* Error out some really stupid names */
|
|
if (startc == '\0' || strchr(")}:$", startc)) {
|
|
*lengthPtr = 1;
|
|
return var_Error;
|
|
}
|
|
name[0] = startc;
|
|
name[1] = '\0';
|
|
|
|
v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
if (v == NULL) {
|
|
*lengthPtr = 2;
|
|
|
|
if ((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)) {
|
|
/*
|
|
* If substituting a local variable in a non-local context,
|
|
* assume it's for dynamic source stuff. We have to handle
|
|
* this specially and return the longhand for the variable
|
|
* with the dollar sign escaped so it makes it back to the
|
|
* caller. Only four of the local variables are treated
|
|
* specially as they are the only four that will be set
|
|
* when dynamic sources are expanded.
|
|
*/
|
|
switch (str[1]) {
|
|
case '@':
|
|
return UNCONST("$(.TARGET)");
|
|
case '%':
|
|
return UNCONST("$(.ARCHIVE)");
|
|
case '*':
|
|
return UNCONST("$(.PREFIX)");
|
|
case '!':
|
|
return UNCONST("$(.MEMBER)");
|
|
}
|
|
}
|
|
/*
|
|
* Error
|
|
*/
|
|
return (errnum ? var_Error : varNoError);
|
|
} else {
|
|
haveModifier = FALSE;
|
|
tstr = &str[1];
|
|
endc = str[1];
|
|
}
|
|
} else {
|
|
Buffer buf; /* Holds the variable name */
|
|
|
|
endc = startc == PROPEN ? PRCLOSE : BRCLOSE;
|
|
Buf_Init(&buf, 0);
|
|
|
|
/*
|
|
* Skip to the end character or a colon, whichever comes first.
|
|
*/
|
|
for (tstr = str + 2;
|
|
*tstr != '\0' && *tstr != endc && *tstr != ':';
|
|
tstr++)
|
|
{
|
|
/*
|
|
* A variable inside a variable, expand
|
|
*/
|
|
if (*tstr == '$') {
|
|
int rlen;
|
|
void *freeIt;
|
|
char *rval = Var_Parse(tstr, ctxt, errnum, &rlen, &freeIt);
|
|
if (rval != NULL) {
|
|
Buf_AddBytes(&buf, strlen(rval), rval);
|
|
}
|
|
if (freeIt)
|
|
free(freeIt);
|
|
tstr += rlen - 1;
|
|
}
|
|
else
|
|
Buf_AddByte(&buf, *tstr);
|
|
}
|
|
if (*tstr == ':') {
|
|
haveModifier = TRUE;
|
|
} else if (*tstr != '\0') {
|
|
haveModifier = FALSE;
|
|
} else {
|
|
/*
|
|
* If we never did find the end character, return NULL
|
|
* right now, setting the length to be the distance to
|
|
* the end of the string, since that's what make does.
|
|
*/
|
|
*lengthPtr = tstr - str;
|
|
Buf_Destroy(&buf, TRUE);
|
|
return (var_Error);
|
|
}
|
|
str = Buf_GetAll(&buf, &vlen);
|
|
|
|
/*
|
|
* At this point, str points into newly allocated memory from
|
|
* buf, containing only the name of the variable.
|
|
*
|
|
* start and tstr point into the const string that was pointed
|
|
* to by the original value of the str parameter. start points
|
|
* to the '$' at the beginning of the string, while tstr points
|
|
* to the char just after the end of the variable name -- this
|
|
* will be '\0', ':', PRCLOSE, or BRCLOSE.
|
|
*/
|
|
|
|
v = VarFind(str, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
/*
|
|
* Check also for bogus D and F forms of local variables since we're
|
|
* in a local context and the name is the right length.
|
|
*/
|
|
if ((v == NULL) && (ctxt != VAR_CMD) && (ctxt != VAR_GLOBAL) &&
|
|
(vlen == 2) && (str[1] == 'F' || str[1] == 'D') &&
|
|
strchr("@%*!<>", str[0]) != NULL) {
|
|
/*
|
|
* Well, it's local -- go look for it.
|
|
*/
|
|
name[0] = *str;
|
|
name[1] = '\0';
|
|
v = VarFind(name, ctxt, 0);
|
|
|
|
if (v != NULL) {
|
|
/*
|
|
* No need for nested expansion or anything, as we're
|
|
* the only one who sets these things and we sure don't
|
|
* but nested invocations in them...
|
|
*/
|
|
nstr = Buf_GetAll(&v->val, NULL);
|
|
|
|
if (str[1] == 'D') {
|
|
nstr = VarModify(ctxt, &parsestate, nstr, VarHead,
|
|
NULL);
|
|
} else {
|
|
nstr = VarModify(ctxt, &parsestate, nstr, VarTail,
|
|
NULL);
|
|
}
|
|
/*
|
|
* Resulting string is dynamically allocated, so
|
|
* tell caller to free it.
|
|
*/
|
|
*freePtr = nstr;
|
|
*lengthPtr = tstr-start+1;
|
|
Buf_Destroy(&buf, TRUE);
|
|
VarFreeEnv(v, TRUE);
|
|
return nstr;
|
|
}
|
|
}
|
|
|
|
if (v == NULL) {
|
|
if (((vlen == 1) ||
|
|
(((vlen == 2) && (str[1] == 'F' || str[1] == 'D')))) &&
|
|
((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)))
|
|
{
|
|
/*
|
|
* If substituting a local variable in a non-local context,
|
|
* assume it's for dynamic source stuff. We have to handle
|
|
* this specially and return the longhand for the variable
|
|
* with the dollar sign escaped so it makes it back to the
|
|
* caller. Only four of the local variables are treated
|
|
* specially as they are the only four that will be set
|
|
* when dynamic sources are expanded.
|
|
*/
|
|
switch (*str) {
|
|
case '@':
|
|
case '%':
|
|
case '*':
|
|
case '!':
|
|
dynamic = TRUE;
|
|
break;
|
|
}
|
|
} else if ((vlen > 2) && (*str == '.') &&
|
|
isupper((unsigned char) str[1]) &&
|
|
((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)))
|
|
{
|
|
int len;
|
|
|
|
len = vlen - 1;
|
|
if ((strncmp(str, ".TARGET", len) == 0) ||
|
|
(strncmp(str, ".ARCHIVE", len) == 0) ||
|
|
(strncmp(str, ".PREFIX", len) == 0) ||
|
|
(strncmp(str, ".MEMBER", len) == 0))
|
|
{
|
|
dynamic = TRUE;
|
|
}
|
|
}
|
|
|
|
if (!haveModifier) {
|
|
/*
|
|
* No modifiers -- have specification length so we can return
|
|
* now.
|
|
*/
|
|
*lengthPtr = tstr - start + 1;
|
|
if (dynamic) {
|
|
char *pstr = bmake_strndup(start, *lengthPtr);
|
|
*freePtr = pstr;
|
|
Buf_Destroy(&buf, TRUE);
|
|
return(pstr);
|
|
} else {
|
|
Buf_Destroy(&buf, TRUE);
|
|
return (errnum ? var_Error : varNoError);
|
|
}
|
|
} else {
|
|
/*
|
|
* Still need to get to the end of the variable specification,
|
|
* so kludge up a Var structure for the modifications
|
|
*/
|
|
v = bmake_malloc(sizeof(Var));
|
|
v->name = UNCONST(str);
|
|
Buf_Init(&v->val, 1);
|
|
v->flags = VAR_JUNK;
|
|
Buf_Destroy(&buf, FALSE);
|
|
}
|
|
} else
|
|
Buf_Destroy(&buf, TRUE);
|
|
}
|
|
|
|
if (v->flags & VAR_IN_USE) {
|
|
Fatal("Variable %s is recursive.", v->name);
|
|
/*NOTREACHED*/
|
|
} else {
|
|
v->flags |= VAR_IN_USE;
|
|
}
|
|
/*
|
|
* Before doing any modification, we have to make sure the value
|
|
* has been fully expanded. If it looks like recursion might be
|
|
* necessary (there's a dollar sign somewhere in the variable's value)
|
|
* we just call Var_Subst to do any other substitutions that are
|
|
* necessary. Note that the value returned by Var_Subst will have
|
|
* been dynamically-allocated, so it will need freeing when we
|
|
* return.
|
|
*/
|
|
nstr = Buf_GetAll(&v->val, NULL);
|
|
if (strchr(nstr, '$') != NULL) {
|
|
nstr = Var_Subst(NULL, nstr, ctxt, errnum);
|
|
*freePtr = nstr;
|
|
}
|
|
|
|
v->flags &= ~VAR_IN_USE;
|
|
|
|
if ((nstr != NULL) && haveModifier) {
|
|
int used;
|
|
/*
|
|
* Skip initial colon.
|
|
*/
|
|
tstr++;
|
|
|
|
nstr = ApplyModifiers(nstr, tstr, startc, endc,
|
|
v, ctxt, errnum, &used, freePtr);
|
|
tstr += used;
|
|
}
|
|
if (*tstr) {
|
|
*lengthPtr = tstr - start + 1;
|
|
} else {
|
|
*lengthPtr = tstr - start;
|
|
}
|
|
|
|
if (v->flags & VAR_FROM_ENV) {
|
|
Boolean destroy = FALSE;
|
|
|
|
if (nstr != Buf_GetAll(&v->val, NULL)) {
|
|
destroy = TRUE;
|
|
} else {
|
|
/*
|
|
* Returning the value unmodified, so tell the caller to free
|
|
* the thing.
|
|
*/
|
|
*freePtr = nstr;
|
|
}
|
|
VarFreeEnv(v, destroy);
|
|
} else if (v->flags & VAR_JUNK) {
|
|
/*
|
|
* Perform any free'ing needed and set *freePtr to NULL so the caller
|
|
* doesn't try to free a static pointer.
|
|
* If VAR_KEEP is also set then we want to keep str as is.
|
|
*/
|
|
if (!(v->flags & VAR_KEEP)) {
|
|
if (*freePtr) {
|
|
free(nstr);
|
|
*freePtr = NULL;
|
|
}
|
|
if (dynamic) {
|
|
nstr = bmake_strndup(start, *lengthPtr);
|
|
*freePtr = nstr;
|
|
} else {
|
|
nstr = var_Error;
|
|
}
|
|
}
|
|
if (nstr != Buf_GetAll(&v->val, NULL))
|
|
Buf_Destroy(&v->val, TRUE);
|
|
free(v->name);
|
|
free(v);
|
|
}
|
|
return (nstr);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Subst --
|
|
* Substitute for all variables in the given string in the given context
|
|
* If undefErr is TRUE, Parse_Error will be called when an undefined
|
|
* variable is encountered.
|
|
*
|
|
* Input:
|
|
* var Named variable || NULL for all
|
|
* str the string which to substitute
|
|
* ctxt the context wherein to find variables
|
|
* undefErr TRUE if undefineds are an error
|
|
*
|
|
* Results:
|
|
* The resulting string.
|
|
*
|
|
* Side Effects:
|
|
* None. The old string must be freed by the caller
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Subst(const char *var, const char *str, GNode *ctxt, Boolean undefErr)
|
|
{
|
|
Buffer buf; /* Buffer for forming things */
|
|
char *val; /* Value to substitute for a variable */
|
|
int length; /* Length of the variable invocation */
|
|
Boolean trailingBslash; /* variable ends in \ */
|
|
void *freeIt = NULL; /* Set if it should be freed */
|
|
static Boolean errorReported; /* Set true if an error has already
|
|
* been reported to prevent a plethora
|
|
* of messages when recursing */
|
|
|
|
Buf_Init(&buf, 0);
|
|
errorReported = FALSE;
|
|
trailingBslash = FALSE;
|
|
|
|
while (*str) {
|
|
if (*str == '\n' && trailingBslash)
|
|
Buf_AddByte(&buf, ' ');
|
|
if (var == NULL && (*str == '$') && (str[1] == '$')) {
|
|
/*
|
|
* A dollar sign may be escaped either with another dollar sign.
|
|
* In such a case, we skip over the escape character and store the
|
|
* dollar sign into the buffer directly.
|
|
*/
|
|
str++;
|
|
Buf_AddByte(&buf, *str);
|
|
str++;
|
|
} else if (*str != '$') {
|
|
/*
|
|
* Skip as many characters as possible -- either to the end of
|
|
* the string or to the next dollar sign (variable invocation).
|
|
*/
|
|
const char *cp;
|
|
|
|
for (cp = str++; *str != '$' && *str != '\0'; str++)
|
|
continue;
|
|
Buf_AddBytes(&buf, str - cp, cp);
|
|
} else {
|
|
if (var != NULL) {
|
|
int expand;
|
|
for (;;) {
|
|
if (str[1] == '\0') {
|
|
/* A trailing $ is kind of a special case */
|
|
Buf_AddByte(&buf, str[0]);
|
|
str++;
|
|
expand = FALSE;
|
|
} else if (str[1] != PROPEN && str[1] != BROPEN) {
|
|
if (str[1] != *var || strlen(var) > 1) {
|
|
Buf_AddBytes(&buf, 2, str);
|
|
str += 2;
|
|
expand = FALSE;
|
|
}
|
|
else
|
|
expand = TRUE;
|
|
break;
|
|
}
|
|
else {
|
|
const char *p;
|
|
|
|
/*
|
|
* Scan up to the end of the variable name.
|
|
*/
|
|
for (p = &str[2]; *p &&
|
|
*p != ':' && *p != PRCLOSE && *p != BRCLOSE; p++)
|
|
if (*p == '$')
|
|
break;
|
|
/*
|
|
* A variable inside the variable. We cannot expand
|
|
* the external variable yet, so we try again with
|
|
* the nested one
|
|
*/
|
|
if (*p == '$') {
|
|
Buf_AddBytes(&buf, p - str, str);
|
|
str = p;
|
|
continue;
|
|
}
|
|
|
|
if (strncmp(var, str + 2, p - str - 2) != 0 ||
|
|
var[p - str - 2] != '\0') {
|
|
/*
|
|
* Not the variable we want to expand, scan
|
|
* until the next variable
|
|
*/
|
|
for (;*p != '$' && *p != '\0'; p++)
|
|
continue;
|
|
Buf_AddBytes(&buf, p - str, str);
|
|
str = p;
|
|
expand = FALSE;
|
|
}
|
|
else
|
|
expand = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if (!expand)
|
|
continue;
|
|
}
|
|
|
|
val = Var_Parse(str, ctxt, undefErr, &length, &freeIt);
|
|
|
|
/*
|
|
* When we come down here, val should either point to the
|
|
* value of this variable, suitably modified, or be NULL.
|
|
* Length should be the total length of the potential
|
|
* variable invocation (from $ to end character...)
|
|
*/
|
|
if (val == var_Error || val == varNoError) {
|
|
/*
|
|
* If performing old-time variable substitution, skip over
|
|
* the variable and continue with the substitution. Otherwise,
|
|
* store the dollar sign and advance str so we continue with
|
|
* the string...
|
|
*/
|
|
if (oldVars) {
|
|
str += length;
|
|
} else if (undefErr) {
|
|
/*
|
|
* If variable is undefined, complain and skip the
|
|
* variable. The complaint will stop us from doing anything
|
|
* when the file is parsed.
|
|
*/
|
|
if (!errorReported) {
|
|
Parse_Error(PARSE_FATAL,
|
|
"Undefined variable \"%.*s\"",length,str);
|
|
}
|
|
str += length;
|
|
errorReported = TRUE;
|
|
} else {
|
|
Buf_AddByte(&buf, *str);
|
|
str += 1;
|
|
}
|
|
} else {
|
|
/*
|
|
* We've now got a variable structure to store in. But first,
|
|
* advance the string pointer.
|
|
*/
|
|
str += length;
|
|
|
|
/*
|
|
* Copy all the characters from the variable value straight
|
|
* into the new string.
|
|
*/
|
|
length = strlen(val);
|
|
Buf_AddBytes(&buf, length, val);
|
|
trailingBslash = length > 0 && val[length - 1] == '\\';
|
|
}
|
|
if (freeIt) {
|
|
free(freeIt);
|
|
freeIt = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
return Buf_Destroy(&buf, FALSE);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_GetTail --
|
|
* Return the tail from each of a list of words. Used to set the
|
|
* System V local variables.
|
|
*
|
|
* Input:
|
|
* file Filename to modify
|
|
*
|
|
* Results:
|
|
* The resulting string.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
#if 0
|
|
char *
|
|
Var_GetTail(char *file)
|
|
{
|
|
return(VarModify(file, VarTail, NULL));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_GetHead --
|
|
* Find the leading components of a (list of) filename(s).
|
|
* XXX: VarHead does not replace foo by ., as (sun) System V make
|
|
* does.
|
|
*
|
|
* Input:
|
|
* file Filename to manipulate
|
|
*
|
|
* Results:
|
|
* The leading components.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_GetHead(char *file)
|
|
{
|
|
return(VarModify(file, VarHead, NULL));
|
|
}
|
|
#endif
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Init --
|
|
* Initialize the module
|
|
*
|
|
* Results:
|
|
* None
|
|
*
|
|
* Side Effects:
|
|
* The VAR_CMD and VAR_GLOBAL contexts are created
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Init(void)
|
|
{
|
|
VAR_GLOBAL = Targ_NewGN("Global");
|
|
VAR_CMD = Targ_NewGN("Command");
|
|
|
|
}
|
|
|
|
|
|
void
|
|
Var_End(void)
|
|
{
|
|
}
|
|
|
|
|
|
/****************** PRINT DEBUGGING INFO *****************/
|
|
static void
|
|
VarPrintVar(void *vp)
|
|
{
|
|
Var *v = (Var *)vp;
|
|
fprintf(debug_file, "%-16s = %s\n", v->name, Buf_GetAll(&v->val, NULL));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Dump --
|
|
* print all variables in a context
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Dump(GNode *ctxt)
|
|
{
|
|
Hash_Search search;
|
|
Hash_Entry *h;
|
|
|
|
for (h = Hash_EnumFirst(&ctxt->context, &search);
|
|
h != NULL;
|
|
h = Hash_EnumNext(&search)) {
|
|
VarPrintVar(Hash_GetValue(h));
|
|
}
|
|
}
|