a65e9283c5
get it clearer what variables are actually needed. Patches: 7.62.2, 7.62.3 Submitted by: Max Okumoto <okumoto@ucsd.edu>
2011 lines
51 KiB
C
2011 lines
51 KiB
C
/*-
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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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* 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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* @(#)var.c 8.3 (Berkeley) 3/19/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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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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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "buf.h"
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#include "config.h"
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#include "globals.h"
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#include "GNode.h"
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#include "make.h"
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#include "nonints.h"
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#include "parse.h"
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#include "str.h"
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#include "targ.h"
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#include "util.h"
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#include "var.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 'err' 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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#define OPEN_PAREN '('
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#define CLOSE_PAREN ')'
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#define OPEN_BRACE '{'
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#define CLOSE_BRACE '}'
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static char *VarGetPattern(GNode *, int, char **, int, int *, size_t *,
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VarPattern *);
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static int VarPrintVar(void *, void *);
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/*
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* Create a Var object.
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*
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* Params:
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* name Name of variable (copied).
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* value Value of variable (copied) or NULL.
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* flags Flags set on variable.
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*
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* Returns:
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* New variable.
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*/
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static Var *
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VarCreate(const char name[], const char value[], int flags)
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{
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Var *v;
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v = emalloc(sizeof(Var));
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v->name = estrdup(name);
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v->val = Buf_Init(0);
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v->flags = flags;
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if (value != NULL) {
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Buf_Append(v->val, value);
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}
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return (v);
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}
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/*
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* Destroy a Var object.
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*
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* Params:
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* v Object to destroy.
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* f True if internal buffer in Buffer object is to be removed.
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*/
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static void
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VarDestroy(Var *v, Boolean f)
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{
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Buf_Destroy(v->val, f);
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free(v->name);
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free(v);
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}
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/*-
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*-----------------------------------------------------------------------
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* VarCmp --
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* See if the given variable matches the named one. Called from
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* Lst_Find when searching for a variable of a given name.
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*
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* Results:
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* 0 if they match. non-zero otherwise.
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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 int
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VarCmp(const void *v, const void *name)
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{
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return (strcmp(name, ((const Var *)v)->name));
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}
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/*-
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*-----------------------------------------------------------------------
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* VarPossiblyExpand --
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* Expand a variable name's embedded variables in the given context.
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*
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* Results:
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* The contents of name, possibly expanded.
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*-----------------------------------------------------------------------
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*/
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static char *
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VarPossiblyExpand(const char *name, GNode *ctxt)
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{
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char *tmp;
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char *result;
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/*
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* XXX make a temporary copy of the name because Var_Subst insists
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* on writing into the string.
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*/
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tmp = estrdup(name);
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if (strchr(name, '$') != NULL) {
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result = Var_Subst(NULL, tmp, ctxt, 0);
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free(tmp);
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return (result);
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} else
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return (tmp);
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}
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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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* Flags:
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* FIND_GLOBAL set means look in the VAR_GLOBAL context too
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* FIND_CMD set means to look in the VAR_CMD context too
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* FIND_ENV 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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Boolean localCheckEnvFirst;
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LstNode *var;
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char *env;
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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 == '.') {
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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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default:
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break;
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}
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}
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/*
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* Note whether this is one of the specific variables we were told
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* through the -E flag to use environment-variable-override for.
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*/
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if (Lst_Find(&envFirstVars, name, (CompareProc *)strcmp) != NULL) {
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localCheckEnvFirst = TRUE;
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} else {
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localCheckEnvFirst = FALSE;
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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,
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* in that order, depending on the FIND_* flags in 'flags'
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*/
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var = Lst_Find(&ctxt->context, name, VarCmp);
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if (var != NULL) {
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/* got it */
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return (Lst_Datum(var));
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}
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/* not there - try command line context */
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if ((flags & FIND_CMD) && (ctxt != VAR_CMD)) {
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var = Lst_Find(&VAR_CMD->context, name, VarCmp);
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if (var != NULL)
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return (Lst_Datum(var));
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}
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/* not there - try global context, but only if not -e/-E */
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if ((flags & FIND_GLOBAL) && (ctxt != VAR_GLOBAL) &&
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!checkEnvFirst && !localCheckEnvFirst) {
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var = Lst_Find(&VAR_GLOBAL->context, name, VarCmp);
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if (var != NULL)
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return (Lst_Datum(var));
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}
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if (!(flags & FIND_ENV))
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/* we were not told to look into the environment */
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return (NULL);
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/* look in the environment */
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if ((env = getenv(name)) != NULL) {
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/* craft this variable from the environment value */
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return (VarCreate(name, env, VAR_FROM_ENV));
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}
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/* deferred check for the environment (in case of -e/-E) */
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if ((checkEnvFirst || localCheckEnvFirst) &&
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(flags & FIND_GLOBAL) && (ctxt != VAR_GLOBAL)) {
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var = Lst_Find(&VAR_GLOBAL->context, name, VarCmp);
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if (var != NULL)
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return (Lst_Datum(var));
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}
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return (NULL);
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}
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/*-
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*-----------------------------------------------------------------------
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* VarAdd --
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* Add a new variable of name name and value val to the given context.
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*
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* Results:
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* None
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*
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* Side Effects:
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* The new variable is placed at the front of the given context
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* The name and val arguments are duplicated so they may
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* safely be freed.
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*-----------------------------------------------------------------------
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*/
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static void
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VarAdd(const char *name, const char *val, GNode *ctxt)
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{
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Lst_AtFront(&ctxt->context, VarCreate(name, val, 0));
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DEBUGF(VAR, ("%s:%s = %s\n", ctxt->name, name, val));
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}
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/*-
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*-----------------------------------------------------------------------
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* Var_Delete --
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* Remove a variable from a context.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* The Var structure is removed and freed.
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*
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*-----------------------------------------------------------------------
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*/
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void
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Var_Delete(const char *name, GNode *ctxt)
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{
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LstNode *ln;
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DEBUGF(VAR, ("%s:delete %s\n", ctxt->name, name));
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ln = Lst_Find(&ctxt->context, name, VarCmp);
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if (ln != NULL) {
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VarDestroy(Lst_Datum(ln), TRUE);
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Lst_Remove(&ctxt->context, ln);
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}
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}
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/*-
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*-----------------------------------------------------------------------
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* Var_Set --
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* Set the variable name to the value val in the given context.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* If the variable doesn't yet exist, a new record is created for it.
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* Else the old value is freed and the new one stuck in its place
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*
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* Notes:
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* The variable is searched for only in its context before being
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* created in that context. I.e. if the context is VAR_GLOBAL,
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* only VAR_GLOBAL->context is searched. Likewise if it is VAR_CMD, only
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* VAR_CMD->context is searched. This is done to avoid the literally
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* thousands of unnecessary strcmp's that used to be done to
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* set, say, $(@) or $(<).
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*-----------------------------------------------------------------------
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*/
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void
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Var_Set(const char *name, const char *val, GNode *ctxt)
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{
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Var *v;
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char *n;
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/*
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* We only look for a variable in the given context since anything set
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* here will override anything in a lower context, so there's not much
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* point in searching them all just to save a bit of memory...
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*/
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n = VarPossiblyExpand(name, ctxt);
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v = VarFind(n, ctxt, 0);
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if (v == NULL) {
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VarAdd(n, val, ctxt);
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} else {
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Buf_Clear(v->val);
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Buf_Append(v->val, val);
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DEBUGF(VAR, ("%s:%s = %s\n", ctxt->name, n, val));
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}
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/*
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* Any variables given on the command line are automatically exported
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* to the environment (as per POSIX standard)
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*/
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if (ctxt == VAR_CMD) {
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setenv(n, val, 1);
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}
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free(n);
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}
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/*-
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*-----------------------------------------------------------------------
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* Var_Append --
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* The variable of the given name has the given value appended to it in
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* the given context.
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*
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* Results:
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* None
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*
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* Side Effects:
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* If the variable doesn't exist, it is created. Else the strings
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* are concatenated (with a space in between).
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*
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* Notes:
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* Only if the variable is being sought in the global context is the
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* environment searched.
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* XXX: Knows its calling circumstances in that if called with ctxt
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* an actual target, it will only search that context since only
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* a local variable could be being appended to. This is actually
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* a big win and must be tolerated.
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*-----------------------------------------------------------------------
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*/
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void
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Var_Append(const char *name, const char *val, GNode *ctxt)
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{
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Var *v;
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char *n;
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n = VarPossiblyExpand(name, ctxt);
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v = VarFind(n, ctxt, (ctxt == VAR_GLOBAL) ? FIND_ENV : 0);
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if (v == NULL) {
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VarAdd(n, val, ctxt);
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} else {
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Buf_AddByte(v->val, (Byte)' ');
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Buf_Append(v->val, val);
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DEBUGF(VAR, ("%s:%s = %s\n", ctxt->name, n,
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(char *)Buf_GetAll(v->val, (size_t *)NULL)));
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if (v->flags & VAR_FROM_ENV) {
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/*
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* If the original variable came from the environment, we
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* have to install it in the global context (we could place
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* it in the environment, but then we should provide a way to
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* export other variables...)
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*/
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v->flags &= ~VAR_FROM_ENV;
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Lst_AtFront(&ctxt->context, v);
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}
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}
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free(n);
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}
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/*-
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*-----------------------------------------------------------------------
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* Var_Exists --
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* See if the given variable exists.
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*
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* Results:
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* TRUE if it does, FALSE if it doesn't
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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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*/
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Boolean
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Var_Exists(const char *name, GNode *ctxt)
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{
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Var *v;
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char *n;
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n = VarPossiblyExpand(name, ctxt);
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v = VarFind(n, ctxt, FIND_CMD|FIND_GLOBAL|FIND_ENV);
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free(n);
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if (v == NULL) {
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return (FALSE);
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} else if (v->flags & VAR_FROM_ENV) {
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VarDestroy(v, TRUE);
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}
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return (TRUE);
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}
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/*-
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*-----------------------------------------------------------------------
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* Var_Value --
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* Return the value of the named variable in the given context
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*
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* Results:
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* The value if the variable exists, NULL if it doesn't
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*
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* Side Effects:
|
|
* None
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Value(const char *name, GNode *ctxt, char **frp)
|
|
{
|
|
Var *v;
|
|
char *n;
|
|
|
|
n = VarPossiblyExpand(name, ctxt);
|
|
v = VarFind(n, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
free(n);
|
|
*frp = NULL;
|
|
if (v != NULL) {
|
|
char *p = (char *)Buf_GetAll(v->val, (size_t *)NULL);
|
|
|
|
if (v->flags & VAR_FROM_ENV) {
|
|
VarDestroy(v, FALSE);
|
|
*frp = p;
|
|
}
|
|
return (p);
|
|
} else {
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarModify --
|
|
* Modify each of the words of the passed string using the given
|
|
* function. Used to implement all modifiers.
|
|
*
|
|
* Results:
|
|
* A string of all the words modified appropriately.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarModify(char *str, VarModifyProc *modProc, 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 [first word does not count] */
|
|
int ac, i;
|
|
|
|
buf = Buf_Init(0);
|
|
addSpace = FALSE;
|
|
|
|
av = brk_string(str, &ac, FALSE);
|
|
|
|
for (i = 1; i < ac; i++)
|
|
addSpace = (*modProc)(av[i], addSpace, buf, datum);
|
|
|
|
Buf_AddByte(buf, '\0');
|
|
str = (char *)Buf_GetAll(buf, (size_t *)NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
return (str);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarSortWords --
|
|
* Sort the words in the string.
|
|
*
|
|
* Input:
|
|
* str String whose words should be sorted
|
|
* cmp A comparison function to control the ordering
|
|
*
|
|
* Results:
|
|
* A string containing the words sorted
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarSortWords(char *str, int (*cmp)(const void *, const void *))
|
|
{
|
|
Buffer *buf;
|
|
char **av;
|
|
int ac, i;
|
|
|
|
buf = Buf_Init(0);
|
|
av = brk_string(str, &ac, FALSE);
|
|
qsort(av + 1, ac - 1, sizeof(char *), cmp);
|
|
for (i = 1; i < ac; i++) {
|
|
Buf_Append(buf, av[i]);
|
|
Buf_AddByte(buf, (Byte)((i < ac - 1) ? ' ' : '\0'));
|
|
}
|
|
str = (char *)Buf_GetAll(buf, (size_t *)NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
return (str);
|
|
}
|
|
|
|
static int
|
|
SortIncreasing(const void *l, const void *r)
|
|
{
|
|
|
|
return (strcmp(*(const char* const*)l, *(const char* const*)r));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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, int err, char **tstr, int delim, int *flags,
|
|
size_t *length, VarPattern *pattern)
|
|
{
|
|
char *cp;
|
|
Buffer *buf = Buf_Init(0);
|
|
size_t junk;
|
|
|
|
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, $, and \, but don't
|
|
* touch other backslashes.
|
|
*/
|
|
for (cp = *tstr; *cp && (*cp != delim); cp++) {
|
|
if (IS_A_MATCH(cp, delim)) {
|
|
Buf_AddByte(buf, (Byte)cp[1]);
|
|
cp++;
|
|
} else if (*cp == '$') {
|
|
if (cp[1] == delim) {
|
|
if (flags == NULL)
|
|
Buf_AddByte(buf, (Byte)*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;
|
|
size_t len;
|
|
Boolean freeIt;
|
|
|
|
/*
|
|
* If unescaped dollar sign not before the
|
|
* delimiter, assume it's a variable
|
|
* substitution and recurse.
|
|
*/
|
|
cp2 = Var_Parse(cp, ctxt, err, &len, &freeIt);
|
|
Buf_Append(buf, cp2);
|
|
if (freeIt)
|
|
free(cp2);
|
|
cp += len - 1;
|
|
} else {
|
|
char *cp2 = &cp[1];
|
|
|
|
if (*cp2 == OPEN_PAREN || *cp2 == OPEN_BRACE) {
|
|
/*
|
|
* 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 == OPEN_PAREN) ? CLOSE_PAREN : CLOSE_BRACE;
|
|
int depth = 1;
|
|
|
|
for (++cp2; *cp2 != '\0' && depth > 0; ++cp2) {
|
|
if (cp2[-1] != '\\') {
|
|
if (*cp2 == have)
|
|
++depth;
|
|
if (*cp2 == want)
|
|
--depth;
|
|
}
|
|
}
|
|
Buf_AppendRange(buf, cp, cp2);
|
|
cp = --cp2;
|
|
} else
|
|
Buf_AddByte(buf, (Byte)*cp);
|
|
}
|
|
}
|
|
}
|
|
else if (pattern && *cp == '&')
|
|
Buf_AddBytes(buf, pattern->leftLen, (Byte *)pattern->lhs);
|
|
else
|
|
Buf_AddByte(buf, (Byte)*cp);
|
|
}
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
|
|
if (*cp != delim) {
|
|
*tstr = cp;
|
|
*length = 0;
|
|
return (NULL);
|
|
} else {
|
|
*tstr = ++cp;
|
|
cp = (char *)Buf_GetAll(buf, length);
|
|
*length -= 1; /* Don't count the NULL */
|
|
Buf_Destroy(buf, FALSE);
|
|
return (cp);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Quote --
|
|
* Quote shell meta-characters in the string
|
|
*
|
|
* Results:
|
|
* The quoted string
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Quote(const char *str)
|
|
{
|
|
Buffer *buf;
|
|
/* This should cover most shells :-( */
|
|
static char meta[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
|
|
char *ret;
|
|
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (; *str; str++) {
|
|
if (strchr(meta, *str) != NULL)
|
|
Buf_AddByte(buf, (Byte)'\\');
|
|
Buf_AddByte(buf, (Byte)*str);
|
|
}
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
ret = Buf_GetAll(buf, NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
return (ret);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* VarREError --
|
|
* Print the error caused by a regcomp or regexec call.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side Effects:
|
|
* An error gets printed.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
VarREError(int err, regex_t *pat, const char *str)
|
|
{
|
|
char *errbuf;
|
|
int errlen;
|
|
|
|
errlen = regerror(err, pat, 0, 0);
|
|
errbuf = emalloc(errlen);
|
|
regerror(err, pat, errbuf, errlen);
|
|
Error("%s: %s", str, errbuf);
|
|
free(errbuf);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Parse --
|
|
* Given the start of a variable invocation, extract the variable
|
|
* name and find its value, then modify it according to the
|
|
* specification.
|
|
*
|
|
* 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 to skip the '$' and the following letter, or 1 if '$' was the
|
|
* last character in the string).
|
|
* A Boolean in *freePtr telling whether the returned string should
|
|
* be freed by the caller.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
* Assumption:
|
|
* It is assumed that Var_Parse() is called with str[0] == '$'.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Parse(char *str, GNode *ctxt, Boolean err, size_t *lengthPtr,
|
|
Boolean *freePtr)
|
|
{
|
|
char *tstr; /* Pointer into str */
|
|
Var *v; /* Variable in invocation */
|
|
Boolean haveModifier; /* TRUE if have modifiers for the variable */
|
|
char endc; /* Ending character when variable in parens
|
|
* or braces */
|
|
char startc; /* Starting character when variable in parens
|
|
* or braces */
|
|
char *start;
|
|
Boolean dynamic; /* TRUE if the variable is local and we're
|
|
* expanding it in a non-local context. This
|
|
* is done to support dynamic sources. The
|
|
* result is just the invocation, unaltered */
|
|
|
|
if (str[1] == '\0') {
|
|
/*
|
|
* Error, there is only a dollar sign in the input string.
|
|
*/
|
|
*freePtr = FALSE;
|
|
*lengthPtr = 1;
|
|
return (err ? var_Error : varNoError);
|
|
}
|
|
|
|
if (str[1] == OPEN_PAREN || str[1] == OPEN_BRACE) {
|
|
/*
|
|
* Check if brackets contain a variable name.
|
|
*/
|
|
int vlen; /* length of variable name, after embedded variable
|
|
* expansion */
|
|
|
|
/* build up expanded variable name in this buffer */
|
|
Buffer *buf = Buf_Init(MAKE_BSIZE);
|
|
|
|
/*
|
|
* Skip to the end character or a colon, whichever comes first,
|
|
* replacing embedded variables as we go.
|
|
*/
|
|
startc = str[1];
|
|
endc = (startc == OPEN_PAREN) ? CLOSE_PAREN : CLOSE_BRACE;
|
|
tstr = str + 2;
|
|
|
|
while (*tstr != '\0' && *tstr != endc && *tstr != ':') {
|
|
if (*tstr == '$') {
|
|
size_t rlen;
|
|
Boolean rfree;
|
|
char *rval;
|
|
|
|
rval = Var_Parse(tstr, ctxt, err, &rlen, &rfree);
|
|
if (rval == var_Error) {
|
|
Fatal("Error expanding embedded variable.");
|
|
}
|
|
if (rval != NULL) {
|
|
Buf_Append(buf, rval);
|
|
if (rfree)
|
|
free(rval);
|
|
}
|
|
tstr += rlen - 1;
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)*tstr);
|
|
}
|
|
tstr++;
|
|
}
|
|
|
|
if (*tstr == '\0') {
|
|
/*
|
|
* 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.
|
|
*/
|
|
*freePtr = FALSE;
|
|
*lengthPtr = tstr - str;
|
|
return (var_Error);
|
|
}
|
|
|
|
haveModifier = (*tstr == ':');
|
|
*tstr = '\0'; /* modify input string */
|
|
start = str;
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
str = Buf_GetAll(buf, (size_t *)NULL); /* REPLACE str */
|
|
vlen = strlen(str);
|
|
|
|
v = VarFind(str, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
|
|
if ((v == (Var *)NULL) && (ctxt != VAR_CMD) && (ctxt != VAR_GLOBAL) &&
|
|
(vlen == 2) && (str[1] == 'F' || str[1] == 'D'))
|
|
{
|
|
/*
|
|
* Check for bogus D and F forms of local variables since we're
|
|
* in a local context and the name is the right length.
|
|
*/
|
|
switch (str[0]) {
|
|
case '@':
|
|
case '%':
|
|
case '*':
|
|
case '!':
|
|
case '>':
|
|
case '<':
|
|
{
|
|
char vname[2];
|
|
char *val;
|
|
|
|
/*
|
|
* Well, it's local -- go look for it.
|
|
*/
|
|
vname[0] = str[0];
|
|
vname[1] = '\0';
|
|
|
|
v = VarFind(vname, ctxt, 0);
|
|
if (v != NULL && !haveModifier) {
|
|
/*
|
|
* No need for nested expansion or anything, as we're
|
|
* the only one who sets these things and we sure don't
|
|
* put nested invocations in them...
|
|
*/
|
|
val = (char *)Buf_GetAll(v->val, (size_t *)NULL);
|
|
|
|
if (str[1] == 'D') {
|
|
val = VarModify(val, VarHead, (void *)NULL);
|
|
} else {
|
|
val = VarModify(val, VarTail, (void *)NULL);
|
|
}
|
|
/*
|
|
* Resulting string is dynamically allocated, so
|
|
* tell caller to free it.
|
|
*/
|
|
*freePtr = TRUE;
|
|
*lengthPtr = tstr - start + 1;
|
|
*tstr = endc;
|
|
Buf_Destroy(buf, TRUE);
|
|
return (val);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (v == (Var *)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[0]) {
|
|
case '@':
|
|
case '%':
|
|
case '*':
|
|
case '!':
|
|
dynamic = TRUE;
|
|
break;
|
|
default:
|
|
dynamic = FALSE;
|
|
break;
|
|
}
|
|
} else if ((vlen > 2) && (str[0] == '.') &&
|
|
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;
|
|
} else {
|
|
dynamic = FALSE;
|
|
}
|
|
} else {
|
|
dynamic = FALSE;
|
|
}
|
|
|
|
if (haveModifier) {
|
|
/*
|
|
* Still need to get to the end of the variable specification,
|
|
* so kludge up a Var structure for the modifications
|
|
*/
|
|
v = VarCreate(str, NULL, VAR_JUNK);
|
|
} else {
|
|
/*
|
|
* No modifiers -- have specification length so we can return
|
|
* now.
|
|
*/
|
|
if (dynamic) {
|
|
*lengthPtr = tstr - start + 1;
|
|
*tstr = endc;
|
|
str = emalloc(*lengthPtr + 1);
|
|
strncpy(str, start, *lengthPtr);
|
|
str[*lengthPtr] = '\0';
|
|
*freePtr = TRUE;
|
|
Buf_Destroy(buf, TRUE);
|
|
return (str);
|
|
} else {
|
|
*lengthPtr = tstr - start + 1;
|
|
*tstr = endc;
|
|
*freePtr = FALSE;
|
|
Buf_Destroy(buf, TRUE);
|
|
return (err ? var_Error : varNoError);
|
|
}
|
|
}
|
|
} else {
|
|
dynamic = FALSE;
|
|
}
|
|
*freePtr = FALSE;
|
|
Buf_Destroy(buf, TRUE);
|
|
|
|
} else {
|
|
/*
|
|
* 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.
|
|
*/
|
|
char name[2];
|
|
|
|
name[0] = str[1];
|
|
name[1] = '\0';
|
|
|
|
v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
|
|
if (v == NULL) {
|
|
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.
|
|
*/
|
|
/* XXX: It looks like $% and $! are reversed here */
|
|
*freePtr = FALSE;
|
|
*lengthPtr = 2;
|
|
switch (str[1]) {
|
|
case '@':
|
|
return ("$(.TARGET)");
|
|
case '%':
|
|
return ("$(.ARCHIVE)");
|
|
case '*':
|
|
return ("$(.PREFIX)");
|
|
case '!':
|
|
return ("$(.MEMBER)");
|
|
default:
|
|
return (err ? var_Error : varNoError);
|
|
}
|
|
} else {
|
|
*freePtr = FALSE;
|
|
*lengthPtr = 2;
|
|
return (err ? var_Error : varNoError);
|
|
}
|
|
} else {
|
|
dynamic = FALSE;
|
|
start = str;
|
|
*freePtr = FALSE;
|
|
*lengthPtr = 2;
|
|
haveModifier = FALSE;
|
|
startc = 0;
|
|
endc = str[1];
|
|
tstr = &str[1];
|
|
}
|
|
}
|
|
|
|
if (v->flags & VAR_IN_USE) {
|
|
Fatal("Variable %s is recursive.", v->name);
|
|
/*NOTREACHED*/
|
|
} else {
|
|
v->flags |= VAR_IN_USE;
|
|
}
|
|
|
|
/*
|
|
* Before doing any modification, we have to make sure the value
|
|
* has been fully expanded. If it looks like recursion might be
|
|
* necessary (there's a dollar sign somewhere in the variable's value)
|
|
* we just call Var_Subst to do any other substitutions that are
|
|
* necessary. Note that the value returned by Var_Subst will have
|
|
* been dynamically-allocated, so it will need freeing when we
|
|
* return.
|
|
*/
|
|
str = (char *)Buf_GetAll(v->val, (size_t *)NULL);
|
|
if (strchr(str, '$') != (char *)NULL) {
|
|
str = Var_Subst(NULL, str, ctxt, err);
|
|
*freePtr = TRUE;
|
|
}
|
|
|
|
v->flags &= ~VAR_IN_USE;
|
|
|
|
/*
|
|
* 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.
|
|
* :S<d><pat1><d><pat2><d>[g]
|
|
* Substitute <pat2> for <pat1> in the value
|
|
* :C<d><pat1><d><pat2><d>[g]
|
|
* 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).
|
|
* :lhs=rhs Like :S, but the rhs goes to the end of
|
|
* the invocation.
|
|
* :U Converts variable to upper-case.
|
|
* :L Converts variable to lower-case.
|
|
*/
|
|
if ((str != NULL) && haveModifier) {
|
|
char *cp;
|
|
/*
|
|
* Skip initial colon while putting it back.
|
|
*/
|
|
*tstr++ = ':';
|
|
while (*tstr != endc) {
|
|
char *newStr; /* New value to return */
|
|
char termc; /* Character which terminated scan */
|
|
|
|
DEBUGF(VAR, ("Applying :%c to \"%s\"\n", *tstr, str));
|
|
switch (*tstr) {
|
|
case 'N':
|
|
case 'M':
|
|
{
|
|
char *pattern;
|
|
char *cp2;
|
|
Boolean copy;
|
|
|
|
copy = FALSE;
|
|
for (cp = tstr + 1;
|
|
*cp != '\0' && *cp != ':' && *cp != endc;
|
|
cp++)
|
|
{
|
|
if (*cp == '\\' && (cp[1] == ':' || cp[1] == endc)) {
|
|
copy = TRUE;
|
|
cp++;
|
|
}
|
|
}
|
|
termc = *cp;
|
|
*cp = '\0';
|
|
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 = emalloc(cp - tstr);
|
|
for (cp2 = pattern, cp = tstr + 1;
|
|
*cp != '\0';
|
|
cp++, cp2++)
|
|
{
|
|
if ((*cp == '\\') &&
|
|
(cp[1] == ':' || cp[1] == endc)) {
|
|
cp++;
|
|
}
|
|
*cp2 = *cp;
|
|
}
|
|
*cp2 = '\0';
|
|
} else {
|
|
pattern = &tstr[1];
|
|
}
|
|
if (*tstr == 'M' || *tstr == 'm') {
|
|
newStr = VarModify(str, VarMatch, pattern);
|
|
} else {
|
|
newStr = VarModify(str, VarNoMatch, pattern);
|
|
}
|
|
if (copy) {
|
|
free(pattern);
|
|
}
|
|
break;
|
|
}
|
|
case 'S':
|
|
{
|
|
VarPattern pattern;
|
|
char del;
|
|
Buffer *buf; /* Buffer for patterns */
|
|
|
|
pattern.flags = 0;
|
|
del = 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;
|
|
}
|
|
|
|
buf = Buf_Init(0);
|
|
|
|
/*
|
|
* Pass through the lhs looking for 1) escaped delimiters,
|
|
* '$'s and backslashes (place the escaped character in
|
|
* uninterpreted) and 2) unescaped $'s that aren't before
|
|
* the delimiter (expand the variable substitution).
|
|
* The result is left in the Buffer buf.
|
|
*/
|
|
for (cp = tstr; *cp != '\0' && *cp != del; cp++) {
|
|
if ((*cp == '\\') &&
|
|
((cp[1] == del) ||
|
|
(cp[1] == '$') ||
|
|
(cp[1] == '\\')))
|
|
{
|
|
Buf_AddByte(buf, (Byte)cp[1]);
|
|
cp++;
|
|
} else if (*cp == '$') {
|
|
if (cp[1] != del) {
|
|
/*
|
|
* If unescaped dollar sign not before the
|
|
* delimiter, assume it's a variable
|
|
* substitution and recurse.
|
|
*/
|
|
char *cp2;
|
|
size_t len;
|
|
Boolean freeIt;
|
|
|
|
cp2 = Var_Parse(cp, ctxt, err, &len, &freeIt);
|
|
Buf_Append(buf, cp2);
|
|
if (freeIt) {
|
|
free(cp2);
|
|
}
|
|
cp += len - 1;
|
|
} else {
|
|
/*
|
|
* Unescaped $ at end of pattern => anchor
|
|
* pattern at end.
|
|
*/
|
|
pattern.flags |= VAR_MATCH_END;
|
|
}
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)*cp);
|
|
}
|
|
}
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
|
|
/*
|
|
* If lhs didn't end with the delimiter, complain and
|
|
* exit.
|
|
*/
|
|
if (*cp != del) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, del);
|
|
}
|
|
|
|
/*
|
|
* Fetch pattern and destroy buffer, but preserve the data
|
|
* in it, since that's our lhs. Note that Buf_GetAll
|
|
* will return the actual number of bytes, which includes
|
|
* the null byte, so we have to decrement the length by
|
|
* one.
|
|
*/
|
|
pattern.lhs = (char *)Buf_GetAll(buf, &pattern.leftLen);
|
|
pattern.leftLen--;
|
|
Buf_Destroy(buf, FALSE);
|
|
|
|
/*
|
|
* Now comes the replacement string. Three things need to
|
|
* be done here: 1) need to compress escaped delimiters and
|
|
* ampersands and 2) need to replace unescaped ampersands
|
|
* with the l.h.s. (since this isn't regexp, we can do
|
|
* it right here) and 3) expand any variable substitutions.
|
|
*/
|
|
buf = Buf_Init(0);
|
|
|
|
tstr = cp + 1;
|
|
for (cp = tstr; *cp != '\0' && *cp != del; cp++) {
|
|
if ((*cp == '\\') &&
|
|
((cp[1] == del) ||
|
|
(cp[1] == '&') ||
|
|
(cp[1] == '\\') ||
|
|
(cp[1] == '$')))
|
|
{
|
|
Buf_AddByte(buf, (Byte)cp[1]);
|
|
cp++;
|
|
} else if ((*cp == '$') && (cp[1] != del)) {
|
|
char *cp2;
|
|
size_t len;
|
|
Boolean freeIt;
|
|
|
|
cp2 = Var_Parse(cp, ctxt, err, &len, &freeIt);
|
|
Buf_Append(buf, cp2);
|
|
cp += len - 1;
|
|
if (freeIt) {
|
|
free(cp2);
|
|
}
|
|
} else if (*cp == '&') {
|
|
Buf_AddBytes(buf, pattern.leftLen,
|
|
(Byte *)pattern.lhs);
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)*cp);
|
|
}
|
|
}
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
|
|
/*
|
|
* If didn't end in delimiter character, complain
|
|
*/
|
|
if (*cp != del) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, del);
|
|
}
|
|
|
|
pattern.rhs = (char *)Buf_GetAll(buf, &pattern.rightLen);
|
|
pattern.rightLen--;
|
|
Buf_Destroy(buf, FALSE);
|
|
|
|
/*
|
|
* Check for global substitution. If 'g' after the final
|
|
* delimiter, substitution is global and is marked that
|
|
* way.
|
|
*/
|
|
cp++;
|
|
if (*cp == 'g') {
|
|
pattern.flags |= VAR_SUB_GLOBAL;
|
|
cp++;
|
|
}
|
|
|
|
/*
|
|
* Global substitution of the empty string causes an
|
|
* infinite number of matches, unless anchored by '^'
|
|
* (start of string) or '$' (end of string). Catch the
|
|
* infinite substitution here.
|
|
* Note that flags can only contain the 3 bits we're
|
|
* interested in so we don't have to mask unrelated
|
|
* bits. We can test for equality.
|
|
*/
|
|
if (!pattern.leftLen && pattern.flags == VAR_SUB_GLOBAL)
|
|
Fatal("Global substitution of the empty string");
|
|
|
|
termc = *cp;
|
|
newStr = VarModify(str, VarSubstitute, &pattern);
|
|
/*
|
|
* Free the two strings.
|
|
*/
|
|
free(pattern.lhs);
|
|
free(pattern.rhs);
|
|
break;
|
|
}
|
|
case 'C':
|
|
{
|
|
int delim;
|
|
VarREPattern pattern;
|
|
char *re;
|
|
int error;
|
|
|
|
pattern.flags = 0;
|
|
delim = tstr[1];
|
|
tstr += 2;
|
|
|
|
cp = tstr;
|
|
|
|
if ((re = VarGetPattern(ctxt, err, &cp, delim, NULL,
|
|
NULL, NULL)) == NULL) {
|
|
/* was: goto cleanup */
|
|
*lengthPtr = cp - start + 1;
|
|
if (*freePtr)
|
|
free(str);
|
|
if (delim != '\0')
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
return (var_Error);
|
|
}
|
|
|
|
if ((pattern.replace = VarGetPattern(ctxt, err, &cp,
|
|
delim, NULL, NULL, NULL)) == NULL){
|
|
free(re);
|
|
|
|
/* was: goto cleanup */
|
|
*lengthPtr = cp - start + 1;
|
|
if (*freePtr)
|
|
free(str);
|
|
if (delim != '\0')
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
return (var_Error);
|
|
}
|
|
|
|
for (;; cp++) {
|
|
switch (*cp) {
|
|
case 'g':
|
|
pattern.flags |= VAR_SUB_GLOBAL;
|
|
continue;
|
|
case '1':
|
|
pattern.flags |= VAR_SUB_ONE;
|
|
continue;
|
|
default:
|
|
break;
|
|
}
|
|
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);
|
|
return (var_Error);
|
|
}
|
|
|
|
pattern.nsub = pattern.re.re_nsub + 1;
|
|
if (pattern.nsub < 1)
|
|
pattern.nsub = 1;
|
|
if (pattern.nsub > 10)
|
|
pattern.nsub = 10;
|
|
pattern.matches = emalloc(pattern.nsub *
|
|
sizeof(regmatch_t));
|
|
newStr = VarModify(str, VarRESubstitute, &pattern);
|
|
regfree(&pattern.re);
|
|
free(pattern.replace);
|
|
free(pattern.matches);
|
|
break;
|
|
}
|
|
case 'L':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
Buffer *buf;
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (cp = str; *cp ; cp++)
|
|
Buf_AddByte(buf, (Byte)tolower(*cp));
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
newStr = (char *)Buf_GetAll(buf, (size_t *)NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'O':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarSortWords(str, SortIncreasing);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'Q':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = Var_Quote(str);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
case 'T':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(str, VarTail, (void *)NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
case 'U':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
Buffer *buf;
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (cp = str; *cp ; cp++)
|
|
Buf_AddByte(buf, (Byte)toupper(*cp));
|
|
|
|
Buf_AddByte(buf, (Byte)'\0');
|
|
newStr = (char *)Buf_GetAll(buf, (size_t *)NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'H':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(str, VarHead, (void *)NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
case 'E':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(str, VarSuffix, (void *)NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
case 'R':
|
|
if (tstr[1] == endc || tstr[1] == ':') {
|
|
newStr = VarModify(str, VarRoot, (void *)NULL);
|
|
cp = tstr + 1;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
#ifdef SUNSHCMD
|
|
case 's':
|
|
if (tstr[1] == 'h' && (tstr[2] == endc || tstr[2] == ':')) {
|
|
const char *error;
|
|
Buffer *buf;
|
|
|
|
buf = Cmd_Exec(str, &error);
|
|
newStr = Buf_GetAll(buf, NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
|
|
if (error)
|
|
Error(error, str);
|
|
cp = tstr + 2;
|
|
termc = *cp;
|
|
break;
|
|
}
|
|
/*FALLTHRU*/
|
|
#endif
|
|
default:
|
|
{
|
|
#ifdef SYSVVARSUB
|
|
/*
|
|
* This can either be a bogus modifier or a System-V
|
|
* substitution command.
|
|
*/
|
|
VarPattern pattern;
|
|
Boolean eqFound;
|
|
int cnt;
|
|
|
|
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) {
|
|
int delim;
|
|
|
|
/*
|
|
* Now we break this sucker into the lhs and
|
|
* rhs. We must null terminate them of course.
|
|
*/
|
|
cp = tstr;
|
|
|
|
delim = '=';
|
|
if ((pattern.lhs = VarGetPattern(ctxt,
|
|
err, &cp, delim, &pattern.flags, &pattern.leftLen,
|
|
NULL)) == NULL) {
|
|
/* was: goto cleanup */
|
|
*lengthPtr = cp - start + 1;
|
|
if (*freePtr)
|
|
free(str);
|
|
if (delim != '\0')
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
return (var_Error);
|
|
}
|
|
|
|
delim = endc;
|
|
if ((pattern.rhs = VarGetPattern(ctxt,
|
|
err, &cp, delim, NULL, &pattern.rightLen,
|
|
&pattern)) == NULL) {
|
|
/* was: goto cleanup */
|
|
*lengthPtr = cp - start + 1;
|
|
if (*freePtr)
|
|
free(str);
|
|
if (delim != '\0')
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
return (var_Error);
|
|
}
|
|
|
|
/*
|
|
* SYSV modifications happen through the whole
|
|
* string. Note the pattern is anchored at the end.
|
|
*/
|
|
termc = *--cp;
|
|
delim = '\0';
|
|
newStr = VarModify(str, VarSYSVMatch, &pattern);
|
|
|
|
free(pattern.lhs);
|
|
free(pattern.rhs);
|
|
|
|
termc = endc;
|
|
} else
|
|
#endif
|
|
{
|
|
Error("Unknown modifier '%c'\n", *tstr);
|
|
for (cp = tstr+1;
|
|
*cp != ':' && *cp != endc && *cp != '\0';
|
|
cp++)
|
|
continue;
|
|
termc = *cp;
|
|
newStr = var_Error;
|
|
}
|
|
}
|
|
}
|
|
DEBUGF(VAR, ("Result is \"%s\"\n", newStr));
|
|
|
|
if (*freePtr) {
|
|
free(str);
|
|
}
|
|
str = newStr;
|
|
if (str != var_Error) {
|
|
*freePtr = TRUE;
|
|
} else {
|
|
*freePtr = FALSE;
|
|
}
|
|
if (termc == '\0') {
|
|
Error("Unclosed variable specification for %s", v->name);
|
|
} else if (termc == ':') {
|
|
*cp++ = termc;
|
|
} else {
|
|
*cp = termc;
|
|
}
|
|
tstr = cp;
|
|
}
|
|
*lengthPtr = tstr - start + 1;
|
|
} else {
|
|
*lengthPtr = tstr - start + 1;
|
|
*tstr = endc;
|
|
}
|
|
|
|
if (v->flags & VAR_FROM_ENV) {
|
|
Boolean destroy = FALSE;
|
|
|
|
if (str != (char *)Buf_GetAll(v->val, (size_t *)NULL)) {
|
|
destroy = TRUE;
|
|
} else {
|
|
/*
|
|
* Returning the value unmodified, so tell the caller to free
|
|
* the thing.
|
|
*/
|
|
*freePtr = TRUE;
|
|
}
|
|
VarDestroy(v, destroy);
|
|
} else if (v->flags & VAR_JUNK) {
|
|
/*
|
|
* Perform any free'ing needed and set *freePtr to FALSE so the caller
|
|
* doesn't try to free a static pointer.
|
|
*/
|
|
if (*freePtr) {
|
|
free(str);
|
|
}
|
|
*freePtr = FALSE;
|
|
VarDestroy(v, TRUE);
|
|
if (dynamic) {
|
|
str = emalloc(*lengthPtr + 1);
|
|
strncpy(str, start, *lengthPtr);
|
|
str[*lengthPtr] = '\0';
|
|
*freePtr = TRUE;
|
|
} else {
|
|
str = err ? var_Error : varNoError;
|
|
}
|
|
}
|
|
return (str);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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.
|
|
*
|
|
* Results:
|
|
* The resulting string.
|
|
*
|
|
* Side Effects:
|
|
* None. The old string must be freed by the caller
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Subst(const char *var, char *str, GNode *ctxt, Boolean undefErr)
|
|
{
|
|
Buffer *buf; /* Buffer for forming things */
|
|
char *val; /* Value to substitute for a variable */
|
|
size_t length; /* Length of the variable invocation */
|
|
Boolean doFree; /* Set true if val should be freed */
|
|
char *result;
|
|
|
|
static Boolean errorReported; /* Set true if an error has already
|
|
* been reported to prevent a plethora
|
|
* of messages when recursing */
|
|
|
|
buf = Buf_Init(0);
|
|
errorReported = FALSE;
|
|
|
|
while (*str) {
|
|
if (var == NULL && (str[0] == '$') && (str[1] == '$')) {
|
|
/*
|
|
* A dollar sign may be escaped either with another dollar sign.
|
|
* In such a case, we skip over the escape character and store the
|
|
* dollar sign into the buffer directly.
|
|
*/
|
|
Buf_AddByte(buf, (Byte)str[0]);
|
|
str += 2;
|
|
|
|
} else if (str[0] == '$') {
|
|
/*
|
|
* Variable invocation.
|
|
*/
|
|
if (var != NULL) {
|
|
int expand;
|
|
for (;;) {
|
|
if (str[1] == OPEN_PAREN || str[1] == OPEN_BRACE) {
|
|
size_t ln;
|
|
const char *p = str + 2;
|
|
|
|
/*
|
|
* Scan up to the end of the variable name.
|
|
*/
|
|
while (*p != '\0' &&
|
|
*p != ':' &&
|
|
*p != CLOSE_PAREN &&
|
|
*p != CLOSE_BRACE &&
|
|
*p != '$') {
|
|
++p;
|
|
}
|
|
|
|
/*
|
|
* A variable inside the variable. We cannot expand
|
|
* the external variable yet, so we try again with
|
|
* the nested one
|
|
*/
|
|
if (*p == '$') {
|
|
Buf_AppendRange(buf, str, p);
|
|
str = p;
|
|
continue;
|
|
}
|
|
|
|
ln = p - (str + 2);
|
|
if (var[ln] == '\0' && strncmp(var, str + 2, ln) == 0) {
|
|
expand = TRUE;
|
|
} else {
|
|
/*
|
|
* Not the variable we want to expand, scan
|
|
* until the next variable
|
|
*/
|
|
while (*p != '$' && *p != '\0')
|
|
p++;
|
|
|
|
Buf_AppendRange(buf, str, p);
|
|
str = p;
|
|
expand = FALSE;
|
|
}
|
|
} else {
|
|
/*
|
|
* Single letter variable name
|
|
*/
|
|
if (var[1] == '\0' && var[0] == str[1]) {
|
|
expand = TRUE;
|
|
} else {
|
|
Buf_AddBytes(buf, 2, (const Byte *)str);
|
|
str += 2;
|
|
expand = FALSE;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
if (!expand)
|
|
continue;
|
|
}
|
|
|
|
val = Var_Parse(str, ctxt, undefErr, &length, &doFree);
|
|
|
|
/*
|
|
* 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, (Byte)*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.
|
|
*/
|
|
Buf_Append(buf, val);
|
|
if (doFree) {
|
|
free(val);
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Skip as many characters as possible -- either to the end of
|
|
* the string or to the next dollar sign (variable invocation).
|
|
*/
|
|
const char *cp = str;
|
|
|
|
do {
|
|
str++;
|
|
} while (str[0] != '$' && str[0] != '\0');
|
|
Buf_AppendRange(buf, cp, str);
|
|
}
|
|
}
|
|
|
|
result = (char *)Buf_GetAll(buf, (size_t *)NULL);
|
|
Buf_Destroy(buf, FALSE);
|
|
return (result);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_GetTail --
|
|
* Return the tail from each of a list of words. Used to set the
|
|
* System V local variables.
|
|
*
|
|
* Results:
|
|
* The resulting string.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_GetTail(char *file)
|
|
{
|
|
|
|
return (VarModify(file, VarTail, (void *)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.
|
|
*
|
|
* Results:
|
|
* The leading components.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_GetHead(char *file)
|
|
{
|
|
|
|
return (VarModify(file, VarHead, (void *)NULL));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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");
|
|
}
|
|
|
|
/****************** PRINT DEBUGGING INFO *****************/
|
|
static int
|
|
VarPrintVar(void *vp, void *dummy __unused)
|
|
{
|
|
Var *v = (Var *) vp;
|
|
|
|
printf("%-16s = %s\n", v->name, (char *)Buf_GetAll(v->val, (size_t *)NULL));
|
|
return (0);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Dump --
|
|
* print all variables in a context
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Dump(GNode *ctxt)
|
|
{
|
|
|
|
Lst_ForEach(&ctxt->context, VarPrintVar, (void *)NULL);
|
|
}
|