2050 lines
47 KiB
C
2050 lines
47 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 <assert.h>
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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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*
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*/
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typedef struct VarParser {
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const char *const input; /* pointer to input string */
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const char *ptr; /* current parser pos in input str */
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GNode *ctxt;
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Boolean err;
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Boolean execute;
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} VarParser;
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static char *VarParse(VarParser *, Boolean *);
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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_ENV; /* variables from the environment */
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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 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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/*
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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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* Find a variable in a variable list.
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*/
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static Var *
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VarLookup(Lst *vlist, const char *name)
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{
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LstNode *ln;
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LST_FOREACH(ln, vlist)
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if (strcmp(((const Var *)Lst_Datum(ln))->name, name) == 0)
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return (Lst_Datum(ln));
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return (NULL);
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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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Buffer *buf;
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if (strchr(name, '$') != NULL) {
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buf = Var_Subst(name, ctxt, 0);
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return (Buf_Peel(buf));
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} else {
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return estrdup(name);
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}
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}
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/**
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* If the variable name begins with a '.', it could very well be
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* one of the local ones. We check the name against all the local
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* variables and substitute the short version in for 'name' if it
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* matches one of them.
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*/
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static const char *
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VarLocal(const char name[])
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{
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if (name[0] == '.') {
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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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return (ALLSRC);
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if (!strcmp(name, ".ARCHIVE"))
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return (ARCHIVE);
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break;
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case 'I':
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if (!strcmp(name, ".IMPSRC"))
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return (IMPSRC);
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break;
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case 'M':
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if (!strcmp(name, ".MEMBER"))
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return (MEMBER);
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break;
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case 'O':
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if (!strcmp(name, ".OODATE"))
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return (OODATE);
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break;
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case 'P':
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if (!strcmp(name, ".PREFIX"))
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return (PREFIX);
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break;
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case 'T':
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if (!strcmp(name, ".TARGET"))
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return (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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return (name);
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}
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/**
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* Find the given variable in the given context and the enviornment.
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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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static Var *
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VarFindEnv(const char name[], GNode *ctxt)
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{
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Var *var;
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name = VarLocal(name);
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if ((var = VarLookup(&ctxt->context, name)) != NULL)
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return (var);
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if ((var = VarLookup(&VAR_ENV->context, name)) != NULL)
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return (var);
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return (NULL);
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}
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/**
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* Look for the variable in the given context.
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*/
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static Var *
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VarFindOnly(const char name[], GNode *ctxt)
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{
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Var *var;
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name = VarLocal(name);
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if ((var = VarLookup(&ctxt->context, name)) != NULL)
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return (var);
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return (NULL);
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}
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/**
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* Look for the variable in all contexts.
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*/
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static Var *
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VarFindAny(const char name[], GNode *ctxt)
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{
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Boolean localCheckEnvFirst;
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LstNode *ln;
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Var *var;
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name = VarLocal(name);
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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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localCheckEnvFirst = FALSE;
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LST_FOREACH(ln, &envFirstVars) {
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if (strcmp(Lst_Datum(ln), name) == 0) {
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localCheckEnvFirst = TRUE;
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break;
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}
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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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if ((var = VarLookup(&ctxt->context, name)) != NULL)
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return (var);
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/* not there - try command line context */
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if (ctxt != VAR_CMD) {
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if ((var = VarLookup(&VAR_CMD->context, name)) != NULL)
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return (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 (ctxt != VAR_GLOBAL && (!checkEnvFirst && !localCheckEnvFirst)) {
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if ((var = VarLookup(&VAR_GLOBAL->context, name)) != NULL)
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return (var);
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}
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if ((var = VarLookup(&VAR_ENV->context, name)) != NULL)
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return (var);
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/* deferred check for the environment (in case of -e/-E) */
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if ((ctxt != VAR_GLOBAL) && (checkEnvFirst || localCheckEnvFirst)) {
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if ((var = VarLookup(&VAR_GLOBAL->context, name)) != NULL)
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return (var);
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}
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return (NULL);
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}
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/**
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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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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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LST_FOREACH(ln, &ctxt->context) {
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if (strcmp(((const Var *)Lst_Datum(ln))->name, name) == 0) {
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VarDestroy(Lst_Datum(ln), TRUE);
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Lst_Remove(&ctxt->context, ln);
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break;
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}
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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
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* set here will override anything in a lower context, so there's not
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* much 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 = VarFindOnly(n, ctxt);
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if (v == NULL) {
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VarAdd(n, val, ctxt);
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if (ctxt == VAR_CMD) {
|
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/*
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* Any variables given on the command line
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* are automatically exported to the
|
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* environment (as per POSIX standard)
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*/
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setenv(n, val, 1);
|
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}
|
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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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if (ctxt == VAR_CMD || (v->flags & VAR_TO_ENV)) {
|
|
/*
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* Any variables given on the command line
|
|
* are automatically exported to the
|
|
* environment (as per POSIX standard)
|
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*/
|
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setenv(n, val, 1);
|
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}
|
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|
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}
|
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|
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DEBUGF(VAR, ("%s:%s = %s\n", ctxt->name, n, val));
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free(n);
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}
|
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|
|
/*
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|
* Var_SetEnv --
|
|
* Set the VAR_TO_ENV flag on a variable
|
|
*/
|
|
void
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Var_SetEnv(const char *name, GNode *ctxt)
|
|
{
|
|
Var *v;
|
|
|
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v = VarFindOnly(name, VAR_CMD);
|
|
if (v != NULL) {
|
|
/*
|
|
* Do not allow .EXPORT: to be set on variables
|
|
* from the comand line or MAKEFLAGS.
|
|
*/
|
|
Error(
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"Warning: Did not set .EXPORTVAR: on %s because it "
|
|
"is from the comand line or MAKEFLAGS", name);
|
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return;
|
|
}
|
|
|
|
v = VarFindAny(name, ctxt);
|
|
if (v == NULL) {
|
|
Lst_AtFront(&VAR_ENV->context,
|
|
VarCreate(name, NULL, VAR_TO_ENV));
|
|
setenv(name, "", 1);
|
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Error("Warning: .EXPORTVAR: set on undefined variable %s", name);
|
|
} else {
|
|
if ((v->flags & VAR_TO_ENV) == 0) {
|
|
v->flags |= VAR_TO_ENV;
|
|
setenv(v->name, Buf_Data(v->val), 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Append --
|
|
* The variable of the given name has the given value appended to it in
|
|
* the given context.
|
|
*
|
|
* 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;
|
|
char *n;
|
|
|
|
n = VarPossiblyExpand(name, ctxt);
|
|
if (ctxt == VAR_GLOBAL) {
|
|
v = VarFindEnv(n, ctxt);
|
|
} else {
|
|
v = VarFindOnly(n, ctxt);
|
|
}
|
|
if (v == NULL) {
|
|
VarAdd(n, val, ctxt);
|
|
} else {
|
|
Buf_AddByte(v->val, (Byte)' ');
|
|
Buf_Append(v->val, val);
|
|
DEBUGF(VAR, ("%s:%s = %s\n", ctxt->name, n, Buf_Data(v->val)));
|
|
}
|
|
free(n);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Exists --
|
|
* See if the given variable exists.
|
|
*
|
|
* Results:
|
|
* TRUE if it does, FALSE if it doesn't
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
Boolean
|
|
Var_Exists(const char *name, GNode *ctxt)
|
|
{
|
|
Var *v;
|
|
char *n;
|
|
|
|
n = VarPossiblyExpand(name, ctxt);
|
|
v = VarFindAny(n, ctxt);
|
|
if (v == NULL) {
|
|
free(n);
|
|
return (FALSE);
|
|
} else {
|
|
free(n);
|
|
return (TRUE);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Value --
|
|
* Return the value of the named variable in the given context
|
|
*
|
|
* 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;
|
|
char *n;
|
|
char *p;
|
|
|
|
n = VarPossiblyExpand(name, ctxt);
|
|
v = VarFindAny(n, ctxt);
|
|
if (v == NULL) {
|
|
p = NULL;
|
|
*frp = NULL;
|
|
} else {
|
|
p = Buf_Data(v->val);
|
|
*frp = NULL;
|
|
}
|
|
free(n);
|
|
return (p);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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:
|
|
* Uses brk_string() so it invalidates any previous call to
|
|
* brk_string().
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarModify(const char *str, VarModifyProc *modProc, void *datum)
|
|
{
|
|
char **av; /* word list [first word does not count] */
|
|
int ac;
|
|
Buffer *buf; /* Buffer for the new string */
|
|
Boolean addSpace; /* TRUE if need to add a space to the buffer
|
|
* before adding the trimmed word */
|
|
int i;
|
|
|
|
av = brk_string(str, &ac, FALSE);
|
|
|
|
buf = Buf_Init(0);
|
|
|
|
addSpace = FALSE;
|
|
for (i = 1; i < ac; i++)
|
|
addSpace = (*modProc)(av[i], addSpace, buf, datum);
|
|
|
|
return (Buf_Peel(buf));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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:
|
|
* Uses brk_string() so it invalidates any previous call to
|
|
* brk_string().
|
|
*
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
static char *
|
|
VarSortWords(const char *str, int (*cmp)(const void *, const void *))
|
|
{
|
|
char **av;
|
|
int ac;
|
|
Buffer *buf;
|
|
int i;
|
|
|
|
av = brk_string(str, &ac, FALSE);
|
|
qsort(av + 1, ac - 1, sizeof(char *), cmp);
|
|
|
|
buf = Buf_Init(0);
|
|
for (i = 1; i < ac; i++) {
|
|
Buf_Append(buf, av[i]);
|
|
Buf_AddByte(buf, (Byte)((i < ac - 1) ? ' ' : '\0'));
|
|
}
|
|
|
|
return (Buf_Peel(buf));
|
|
}
|
|
|
|
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).
|
|
* 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 Buffer *
|
|
VarGetPattern(VarParser *vp, int delim, int *flags, VarPattern *patt)
|
|
{
|
|
Buffer *buf;
|
|
|
|
buf = Buf_Init(0);
|
|
|
|
/*
|
|
* Skim through until the matching delimiter is found; pick up
|
|
* variable substitutions on the way. Also allow backslashes to quote
|
|
* the delimiter, $, and \, but don't touch other backslashes.
|
|
*/
|
|
while (*vp->ptr != '\0') {
|
|
if (*vp->ptr == delim) {
|
|
return (buf);
|
|
|
|
} else if ((vp->ptr[0] == '\\') &&
|
|
((vp->ptr[1] == delim) ||
|
|
(vp->ptr[1] == '\\') ||
|
|
(vp->ptr[1] == '$') ||
|
|
(vp->ptr[1] == '&' && patt != NULL))) {
|
|
vp->ptr++; /* consume backslash */
|
|
Buf_AddByte(buf, (Byte)vp->ptr[0]);
|
|
vp->ptr++;
|
|
|
|
} else if (vp->ptr[0] == '$') {
|
|
if (vp->ptr[1] == delim) {
|
|
if (flags == NULL) {
|
|
Buf_AddByte(buf, (Byte)vp->ptr[0]);
|
|
vp->ptr++;
|
|
} else {
|
|
/*
|
|
* Unescaped $ at end of patt =>
|
|
* anchor patt at end.
|
|
*/
|
|
*flags |= VAR_MATCH_END;
|
|
vp->ptr++;
|
|
}
|
|
} else {
|
|
VarParser subvp = {
|
|
vp->ptr,
|
|
vp->ptr,
|
|
vp->ctxt,
|
|
vp->err,
|
|
vp->execute
|
|
};
|
|
char *rval;
|
|
Boolean rfree;
|
|
|
|
/*
|
|
* If unescaped dollar sign not
|
|
* before the delimiter, assume it's
|
|
* a variable substitution and
|
|
* recurse.
|
|
*/
|
|
rval = VarParse(&subvp, &rfree);
|
|
Buf_Append(buf, rval);
|
|
if (rfree)
|
|
free(rval);
|
|
vp->ptr = subvp.ptr;
|
|
}
|
|
} else if (vp->ptr[0] == '&' && patt != NULL) {
|
|
Buf_AppendBuf(buf, patt->lhs);
|
|
vp->ptr++;
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)vp->ptr[0]);
|
|
vp->ptr++;
|
|
}
|
|
}
|
|
|
|
Buf_Destroy(buf, TRUE);
|
|
return (NULL);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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'`\";&<>()|*?{}[]\\$!#^~";
|
|
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (; *str; str++) {
|
|
if (strchr(meta, *str) != NULL)
|
|
Buf_AddByte(buf, (Byte)'\\');
|
|
Buf_AddByte(buf, (Byte)*str);
|
|
}
|
|
|
|
return (Buf_Peel(buf));
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* Make sure this variable is fully expanded.
|
|
*/
|
|
static char *
|
|
VarExpand(Var *v, VarParser *vp)
|
|
{
|
|
char *value;
|
|
char *result;
|
|
|
|
if (v->flags & VAR_IN_USE) {
|
|
Fatal("Variable %s is recursive.", v->name);
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
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.
|
|
*/
|
|
value = Buf_Data(v->val);
|
|
if (strchr(value, '$') == NULL) {
|
|
result = strdup(value);
|
|
} else {
|
|
Buffer *buf;
|
|
|
|
buf = Var_Subst(value, vp->ctxt, vp->err);
|
|
result = Buf_Peel(buf);
|
|
}
|
|
|
|
v->flags &= ~VAR_IN_USE;
|
|
|
|
return (result);
|
|
}
|
|
|
|
/**
|
|
* Select only those words in value that match the modifier.
|
|
*/
|
|
static char *
|
|
modifier_M(VarParser *vp, const char value[], char endc)
|
|
{
|
|
char *patt;
|
|
char *ptr;
|
|
char *newValue;
|
|
char modifier;
|
|
|
|
modifier = vp->ptr[0];
|
|
vp->ptr++; /* consume 'M' or 'N' */
|
|
|
|
/*
|
|
* Compress the \:'s out of the pattern, so allocate enough
|
|
* room to hold the uncompressed pattern and compress the
|
|
* pattern into that space.
|
|
*/
|
|
patt = estrdup(vp->ptr);
|
|
ptr = patt;
|
|
while (vp->ptr[0] != '\0') {
|
|
if (vp->ptr[0] == endc || vp->ptr[0] == ':') {
|
|
break;
|
|
}
|
|
if (vp->ptr[0] == '\\' &&
|
|
(vp->ptr[1] == endc || vp->ptr[1] == ':')) {
|
|
vp->ptr++; /* consume backslash */
|
|
}
|
|
*ptr = vp->ptr[0];
|
|
ptr++;
|
|
vp->ptr++;
|
|
}
|
|
*ptr = '\0';
|
|
|
|
if (modifier == 'M') {
|
|
newValue = VarModify(value, VarMatch, patt);
|
|
} else {
|
|
newValue = VarModify(value, VarNoMatch, patt);
|
|
}
|
|
free(patt);
|
|
|
|
return (newValue);
|
|
}
|
|
|
|
/**
|
|
* Substitute the replacement string for the pattern. The substitution
|
|
* is applied to each word in value.
|
|
*/
|
|
static char *
|
|
modifier_S(VarParser *vp, const char value[], Var *v)
|
|
{
|
|
VarPattern patt;
|
|
char delim;
|
|
char *newValue;
|
|
|
|
patt.flags = 0;
|
|
|
|
vp->ptr++; /* consume 'S' */
|
|
|
|
delim = *vp->ptr; /* used to find end of pattern */
|
|
vp->ptr++; /* consume 1st delim */
|
|
|
|
/*
|
|
* If pattern begins with '^', it is anchored to the start of the
|
|
* word -- skip over it and flag pattern.
|
|
*/
|
|
if (*vp->ptr == '^') {
|
|
patt.flags |= VAR_MATCH_START;
|
|
vp->ptr++;
|
|
}
|
|
|
|
patt.lhs = VarGetPattern(vp, delim, &patt.flags, NULL);
|
|
if (patt.lhs == NULL) {
|
|
/*
|
|
* LHS didn't end with the delim, complain and exit.
|
|
*/
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
}
|
|
|
|
vp->ptr++; /* consume 2nd delim */
|
|
|
|
patt.rhs = VarGetPattern(vp, delim, NULL, &patt);
|
|
if (patt.rhs == NULL) {
|
|
/*
|
|
* RHS didn't end with the delim, complain and exit.
|
|
*/
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
}
|
|
|
|
vp->ptr++; /* consume last delim */
|
|
|
|
/*
|
|
* Check for global substitution. If 'g' after the final delimiter,
|
|
* substitution is global and is marked that way.
|
|
*/
|
|
if (vp->ptr[0] == 'g') {
|
|
patt.flags |= VAR_SUB_GLOBAL;
|
|
vp->ptr++;
|
|
}
|
|
|
|
/*
|
|
* 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 (Buf_Size(patt.lhs) == 0 && patt.flags == VAR_SUB_GLOBAL)
|
|
Fatal("Global substitution of the empty string");
|
|
|
|
newValue = VarModify(value, VarSubstitute, &patt);
|
|
|
|
/*
|
|
* Free the two strings.
|
|
*/
|
|
free(patt.lhs);
|
|
free(patt.rhs);
|
|
|
|
return (newValue);
|
|
}
|
|
|
|
static char *
|
|
modifier_C(VarParser *vp, char value[], Var *v)
|
|
{
|
|
VarPattern patt;
|
|
char delim;
|
|
int error;
|
|
char *newValue;
|
|
|
|
patt.flags = 0;
|
|
|
|
vp->ptr++; /* consume 'C' */
|
|
|
|
delim = *vp->ptr; /* delimiter between sections */
|
|
|
|
vp->ptr++; /* consume 1st delim */
|
|
|
|
patt.lhs = VarGetPattern(vp, delim, NULL, NULL);
|
|
if (patt.lhs == NULL) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
}
|
|
|
|
vp->ptr++; /* consume 2st delim */
|
|
|
|
patt.rhs = VarGetPattern(vp, delim, NULL, NULL);
|
|
if (patt.rhs == NULL) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, delim);
|
|
}
|
|
|
|
vp->ptr++; /* consume last delim */
|
|
|
|
switch (*vp->ptr) {
|
|
case 'g':
|
|
patt.flags |= VAR_SUB_GLOBAL;
|
|
vp->ptr++; /* consume 'g' */
|
|
break;
|
|
case '1':
|
|
patt.flags |= VAR_SUB_ONE;
|
|
vp->ptr++; /* consume '1' */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
error = regcomp(&patt.re, Buf_Data(patt.lhs), REG_EXTENDED);
|
|
if (error) {
|
|
VarREError(error, &patt.re, "RE substitution error");
|
|
free(patt.rhs);
|
|
free(patt.lhs);
|
|
return (var_Error);
|
|
}
|
|
|
|
patt.nsub = patt.re.re_nsub + 1;
|
|
if (patt.nsub < 1)
|
|
patt.nsub = 1;
|
|
if (patt.nsub > 10)
|
|
patt.nsub = 10;
|
|
patt.matches = emalloc(patt.nsub * sizeof(regmatch_t));
|
|
|
|
newValue = VarModify(value, VarRESubstitute, &patt);
|
|
|
|
regfree(&patt.re);
|
|
free(patt.matches);
|
|
free(patt.rhs);
|
|
free(patt.lhs);
|
|
|
|
return (newValue);
|
|
}
|
|
|
|
static char *
|
|
sysVvarsub(VarParser *vp, char startc, Var *v, const char value[])
|
|
{
|
|
#ifdef SYSVVARSUB
|
|
/*
|
|
* This can either be a bogus modifier or a System-V substitution
|
|
* command.
|
|
*/
|
|
char endc;
|
|
VarPattern patt;
|
|
Boolean eqFound;
|
|
int cnt;
|
|
char *newStr;
|
|
const char *cp;
|
|
|
|
endc = (startc == OPEN_PAREN) ? CLOSE_PAREN : CLOSE_BRACE;
|
|
|
|
patt.flags = 0;
|
|
|
|
/*
|
|
* First we make a pass through the string trying to verify it is a
|
|
* SYSV-make-style translation: it must be: <string1>=<string2>)
|
|
*/
|
|
eqFound = FALSE;
|
|
cp = vp->ptr;
|
|
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.
|
|
*/
|
|
patt.lhs = VarGetPattern(vp, '=', &patt.flags, NULL);
|
|
if (patt.lhs == NULL) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, '=');
|
|
}
|
|
vp->ptr++; /* consume '=' */
|
|
|
|
patt.rhs = VarGetPattern(vp, endc, NULL, &patt);
|
|
if (patt.rhs == NULL) {
|
|
Fatal("Unclosed substitution for %s (%c missing)",
|
|
v->name, endc);
|
|
}
|
|
|
|
/*
|
|
* SYSV modifications happen through the whole string. Note
|
|
* the pattern is anchored at the end.
|
|
*/
|
|
newStr = VarModify(value, VarSYSVMatch, &patt);
|
|
|
|
free(patt.lhs);
|
|
free(patt.rhs);
|
|
} else
|
|
#endif
|
|
{
|
|
Error("Unknown modifier '%c'\n", *vp->ptr);
|
|
vp->ptr++;
|
|
while (*vp->ptr != '\0') {
|
|
if (*vp->ptr == endc && *vp->ptr == ':') {
|
|
break;
|
|
}
|
|
vp->ptr++;
|
|
}
|
|
newStr = var_Error;
|
|
}
|
|
|
|
return (newStr);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* XXXHB update this comment or remove it and point to the man page.
|
|
*/
|
|
static char *
|
|
ParseModifier(VarParser *vp, char startc, Var *v, Boolean *freeResult)
|
|
{
|
|
char *value;
|
|
char endc;
|
|
|
|
value = VarExpand(v, vp);
|
|
*freeResult = TRUE;
|
|
|
|
endc = (startc == OPEN_PAREN) ? CLOSE_PAREN : CLOSE_BRACE;
|
|
|
|
vp->ptr++; /* consume first colon */
|
|
|
|
while (*vp->ptr != '\0') {
|
|
char *newStr; /* New value to return */
|
|
|
|
if (*vp->ptr == endc) {
|
|
return (value);
|
|
}
|
|
|
|
DEBUGF(VAR, ("Applying :%c to \"%s\"\n", *vp->ptr, value));
|
|
switch (*vp->ptr) {
|
|
case 'N':
|
|
case 'M':
|
|
newStr = modifier_M(vp, value, endc);
|
|
break;
|
|
case 'S':
|
|
newStr = modifier_S(vp, value, v);
|
|
break;
|
|
case 'C':
|
|
newStr = modifier_C(vp, value, v);
|
|
break;
|
|
default:
|
|
if (vp->ptr[1] != endc && vp->ptr[1] != ':') {
|
|
#ifdef SUNSHCMD
|
|
if ((vp->ptr[0] == 's') &&
|
|
(vp->ptr[1] == 'h') &&
|
|
(vp->ptr[2] == endc || vp->ptr[2] == ':')) {
|
|
const char *error;
|
|
|
|
if (vp->execute) {
|
|
newStr = Buf_Peel(
|
|
Cmd_Exec(value, &error));
|
|
} else {
|
|
newStr = estrdup("");
|
|
}
|
|
|
|
if (error)
|
|
Error(error, value);
|
|
vp->ptr += 2;
|
|
} else
|
|
#endif
|
|
{
|
|
newStr = sysVvarsub(vp, startc, v, value);
|
|
}
|
|
break;
|
|
}
|
|
|
|
switch (vp->ptr[0]) {
|
|
case 'L':
|
|
{
|
|
const char *cp;
|
|
Buffer *buf;
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (cp = value; *cp; cp++)
|
|
Buf_AddByte(buf, (Byte)tolower(*cp));
|
|
|
|
newStr = Buf_Peel(buf);
|
|
|
|
vp->ptr++;
|
|
break;
|
|
}
|
|
case 'O':
|
|
newStr = VarSortWords(value, SortIncreasing);
|
|
vp->ptr++;
|
|
break;
|
|
case 'Q':
|
|
newStr = Var_Quote(value);
|
|
vp->ptr++;
|
|
break;
|
|
case 'T':
|
|
newStr = VarModify(value, VarTail, NULL);
|
|
vp->ptr++;
|
|
break;
|
|
case 'U':
|
|
{
|
|
const char *cp;
|
|
Buffer *buf;
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
for (cp = value; *cp; cp++)
|
|
Buf_AddByte(buf, (Byte)toupper(*cp));
|
|
|
|
newStr = Buf_Peel(buf);
|
|
|
|
vp->ptr++;
|
|
break;
|
|
}
|
|
case 'H':
|
|
newStr = VarModify(value, VarHead, NULL);
|
|
vp->ptr++;
|
|
break;
|
|
case 'E':
|
|
newStr = VarModify(value, VarSuffix, NULL);
|
|
vp->ptr++;
|
|
break;
|
|
case 'R':
|
|
newStr = VarModify(value, VarRoot, NULL);
|
|
vp->ptr++;
|
|
break;
|
|
default:
|
|
newStr = sysVvarsub(vp, startc, v, value);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
DEBUGF(VAR, ("Result is \"%s\"\n", newStr));
|
|
if (*freeResult) {
|
|
free(value);
|
|
}
|
|
|
|
value = newStr;
|
|
*freeResult = (value == var_Error) ? FALSE : TRUE;
|
|
|
|
if (vp->ptr[0] == ':') {
|
|
vp->ptr++; /* consume colon */
|
|
}
|
|
}
|
|
|
|
return (value);
|
|
}
|
|
|
|
static char *
|
|
ParseRestModifier(VarParser *vp, char startc, Buffer *buf, Boolean *freeResult)
|
|
{
|
|
const char *vname;
|
|
size_t vlen;
|
|
Var *v;
|
|
char *value;
|
|
|
|
vname = Buf_GetAll(buf, &vlen);
|
|
|
|
v = VarFindAny(vname, vp->ctxt);
|
|
if (v != NULL) {
|
|
value = ParseModifier(vp, startc, v, freeResult);
|
|
return (value);
|
|
}
|
|
|
|
if ((vp->ctxt == VAR_CMD) || (vp->ctxt == VAR_GLOBAL)) {
|
|
size_t consumed;
|
|
/*
|
|
* Still need to get to the end of the variable
|
|
* specification, so kludge up a Var structure for the
|
|
* modifications
|
|
*/
|
|
v = VarCreate(vname, NULL, VAR_JUNK);
|
|
value = ParseModifier(vp, startc, v, freeResult);
|
|
if (*freeResult) {
|
|
free(value);
|
|
}
|
|
VarDestroy(v, TRUE);
|
|
|
|
consumed = vp->ptr - vp->input + 1;
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (vlen == 1 ||
|
|
(vlen == 2 && (vname[1] == 'F' || vname[1] == 'D'))) {
|
|
if (strchr("!%*@", vname[0]) != NULL) {
|
|
value = emalloc(consumed + 1);
|
|
strncpy(value, vp->input, consumed);
|
|
value[consumed] = '\0';
|
|
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
}
|
|
if (vlen > 2 &&
|
|
vname[0] == '.' &&
|
|
isupper((unsigned char)vname[1])) {
|
|
if ((strncmp(vname, ".TARGET", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".ARCHIVE", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".PREFIX", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".MEMBER", vlen - 1) == 0)) {
|
|
value = emalloc(consumed + 1);
|
|
strncpy(value, vp->input, consumed);
|
|
value[consumed] = '\0';
|
|
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
}
|
|
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
} else {
|
|
/*
|
|
* Check for D and F forms of local variables since we're in
|
|
* a local context and the name is the right length.
|
|
*/
|
|
if (vlen == 2 &&
|
|
(vname[1] == 'F' || vname[1] == 'D') &&
|
|
(strchr("!%*<>@", vname[0]) != NULL)) {
|
|
char name[2];
|
|
|
|
name[0] = vname[0];
|
|
name[1] = '\0';
|
|
|
|
v = VarFindOnly(name, vp->ctxt);
|
|
if (v != NULL) {
|
|
value = ParseModifier(vp, startc, v, freeResult);
|
|
return (value);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Still need to get to the end of the variable
|
|
* specification, so kludge up a Var structure for the
|
|
* modifications
|
|
*/
|
|
v = VarCreate(vname, NULL, VAR_JUNK);
|
|
value = ParseModifier(vp, startc, v, freeResult);
|
|
if (*freeResult) {
|
|
free(value);
|
|
}
|
|
VarDestroy(v, TRUE);
|
|
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
ParseRestEnd(VarParser *vp, Buffer *buf, Boolean *freeResult)
|
|
{
|
|
const char *vname;
|
|
size_t vlen;
|
|
Var *v;
|
|
char *value;
|
|
|
|
vname = Buf_GetAll(buf, &vlen);
|
|
|
|
v = VarFindAny(vname, vp->ctxt);
|
|
if (v != NULL) {
|
|
value = VarExpand(v, vp);
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
|
|
if ((vp->ctxt == VAR_CMD) || (vp->ctxt == VAR_GLOBAL)) {
|
|
size_t consumed = vp->ptr - vp->input + 1;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if (vlen == 1 ||
|
|
(vlen == 2 && (vname[1] == 'F' || vname[1] == 'D'))) {
|
|
if (strchr("!%*@", vname[0]) != NULL) {
|
|
value = emalloc(consumed + 1);
|
|
strncpy(value, vp->input, consumed);
|
|
value[consumed] = '\0';
|
|
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
}
|
|
if (vlen > 2 &&
|
|
vname[0] == '.' &&
|
|
isupper((unsigned char)vname[1])) {
|
|
if ((strncmp(vname, ".TARGET", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".ARCHIVE", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".PREFIX", vlen - 1) == 0) ||
|
|
(strncmp(vname, ".MEMBER", vlen - 1) == 0)) {
|
|
value = emalloc(consumed + 1);
|
|
strncpy(value, vp->input, consumed);
|
|
value[consumed] = '\0';
|
|
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Check for D and F forms of local variables since we're in
|
|
* a local context and the name is the right length.
|
|
*/
|
|
if (vlen == 2 &&
|
|
(vname[1] == 'F' || vname[1] == 'D') &&
|
|
(strchr("!%*<>@", vname[0]) != NULL)) {
|
|
char name[2];
|
|
|
|
name[0] = vname[0];
|
|
name[1] = '\0';
|
|
|
|
v = VarFindOnly(name, vp->ctxt);
|
|
if (v != NULL) {
|
|
char *val;
|
|
/*
|
|
* 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 = Buf_Data(v->val);
|
|
|
|
if (vname[1] == 'D') {
|
|
val = VarModify(val, VarHead, NULL);
|
|
} else {
|
|
val = VarModify(val, VarTail, NULL);
|
|
}
|
|
|
|
*freeResult = TRUE;
|
|
return (val);
|
|
}
|
|
}
|
|
}
|
|
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
}
|
|
|
|
/**
|
|
* Parse a multi letter variable name, and return it's value.
|
|
*/
|
|
static char *
|
|
VarParseLong(VarParser *vp, Boolean *freeResult)
|
|
{
|
|
Buffer *buf;
|
|
char startc;
|
|
char endc;
|
|
char *value;
|
|
|
|
buf = Buf_Init(MAKE_BSIZE);
|
|
|
|
startc = vp->ptr[0];
|
|
vp->ptr++; /* consume opening paren or brace */
|
|
|
|
endc = (startc == OPEN_PAREN) ? CLOSE_PAREN : CLOSE_BRACE;
|
|
|
|
/*
|
|
* Process characters until we reach an end character or a colon,
|
|
* replacing embedded variables as we go.
|
|
*/
|
|
while (*vp->ptr != '\0') {
|
|
if (*vp->ptr == endc) {
|
|
value = ParseRestEnd(vp, buf, freeResult);
|
|
vp->ptr++; /* consume closing paren or brace */
|
|
Buf_Destroy(buf, TRUE);
|
|
return (value);
|
|
|
|
} else if (*vp->ptr == ':') {
|
|
value = ParseRestModifier(vp, startc, buf, freeResult);
|
|
vp->ptr++; /* consume closing paren or brace */
|
|
Buf_Destroy(buf, TRUE);
|
|
return (value);
|
|
|
|
} else if (*vp->ptr == '$') {
|
|
VarParser subvp = {
|
|
vp->ptr,
|
|
vp->ptr,
|
|
vp->ctxt,
|
|
vp->err,
|
|
vp->execute
|
|
};
|
|
char *rval;
|
|
Boolean rfree;
|
|
|
|
rval = VarParse(&subvp, &rfree);
|
|
if (rval == var_Error) {
|
|
Fatal("Error expanding embedded variable.");
|
|
}
|
|
Buf_Append(buf, rval);
|
|
if (rfree)
|
|
free(rval);
|
|
vp->ptr = subvp.ptr;
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)*vp->ptr);
|
|
vp->ptr++;
|
|
}
|
|
}
|
|
|
|
/* If we did not find the end character, return var_Error */
|
|
Buf_Destroy(buf, TRUE);
|
|
*freeResult = FALSE;
|
|
return (var_Error);
|
|
}
|
|
|
|
/**
|
|
* Parse a single letter variable name, and return it's value.
|
|
*/
|
|
static char *
|
|
VarParseShort(VarParser *vp, Boolean *freeResult)
|
|
{
|
|
char vname[2];
|
|
Var *v;
|
|
char *value;
|
|
|
|
vname[0] = vp->ptr[0];
|
|
vname[1] = '\0';
|
|
|
|
vp->ptr++; /* consume single letter */
|
|
|
|
v = VarFindAny(vname, vp->ctxt);
|
|
if (v != NULL) {
|
|
value = VarExpand(v, vp);
|
|
*freeResult = TRUE;
|
|
return (value);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
if ((vp->ctxt == VAR_CMD) || (vp->ctxt == VAR_GLOBAL)) {
|
|
|
|
/* XXX: It looks like $% and $! are reversed here */
|
|
switch (vname[0]) {
|
|
case '@':
|
|
*freeResult = TRUE;
|
|
return (estrdup("$(.TARGET)"));
|
|
case '%':
|
|
*freeResult = TRUE;
|
|
return (estrdup("$(.ARCHIVE)"));
|
|
case '*':
|
|
*freeResult = TRUE;
|
|
return (estrdup("$(.PREFIX)"));
|
|
case '!':
|
|
*freeResult = TRUE;
|
|
return (estrdup("$(.MEMBER)"));
|
|
default:
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
}
|
|
}
|
|
|
|
/* Variable name was not found. */
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
}
|
|
|
|
static char *
|
|
VarParse(VarParser *vp, Boolean *freeResult)
|
|
{
|
|
|
|
vp->ptr++; /* consume '$' or last letter of conditional */
|
|
|
|
if (vp->ptr[0] == '\0') {
|
|
/* Error, there is only a dollar sign in the input string. */
|
|
*freeResult = FALSE;
|
|
return (vp->err ? var_Error : varNoError);
|
|
|
|
} else if (vp->ptr[0] == OPEN_PAREN || vp->ptr[0] == OPEN_BRACE) {
|
|
/* multi letter variable name */
|
|
return (VarParseLong(vp, freeResult));
|
|
|
|
} else {
|
|
/* single letter variable name */
|
|
return (VarParseShort(vp, freeResult));
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* 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 value of the variable or var_Error if the specification
|
|
* is invalid. The number of characters in the specification
|
|
* is placed in the variable pointed to by consumed. (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 *freeResult telling whether the
|
|
* returned string should be freed by the caller.
|
|
*
|
|
* Side Effects:
|
|
* None.
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
char *
|
|
Var_Parse(const char input[], GNode *ctxt, Boolean err,
|
|
size_t *consumed, Boolean *freeResult)
|
|
{
|
|
VarParser vp = {
|
|
input,
|
|
input,
|
|
ctxt,
|
|
err,
|
|
TRUE
|
|
};
|
|
char *value;
|
|
|
|
value = VarParse(&vp, freeResult);
|
|
*consumed += vp.ptr - vp.input;
|
|
return (value);
|
|
}
|
|
|
|
/*
|
|
*
|
|
* Results:
|
|
* The number of characters in the specification. For invalid
|
|
* specifications, this is just 2 to skip the '$' and the
|
|
* following letter, or 1 if '$' was the last character in the
|
|
* string.
|
|
*/
|
|
size_t
|
|
Var_Match(const char input[], GNode *ctxt)
|
|
{
|
|
VarParser vp = {
|
|
input,
|
|
input,
|
|
ctxt,
|
|
FALSE,
|
|
FALSE
|
|
};
|
|
char *value;
|
|
Boolean freeResult;
|
|
|
|
value = VarParse(&vp, &freeResult);
|
|
if (freeResult) {
|
|
free(value);
|
|
}
|
|
return (vp.ptr - vp.input);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Subst --
|
|
* Substitute for all variables in the given string in the given context
|
|
* If err 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
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
Buffer *
|
|
Var_Subst(const char *str, GNode *ctxt, Boolean err)
|
|
{
|
|
Boolean errorReported;
|
|
Buffer *buf; /* Buffer for forming things */
|
|
|
|
/*
|
|
* Set TRUE if an error has already been reported to prevent a
|
|
* plethora of messages when recursing. XXXHB this comment sounds
|
|
* wrong.
|
|
*/
|
|
errorReported = FALSE;
|
|
|
|
buf = Buf_Init(0);
|
|
while (str[0] != '\0') {
|
|
if ((str[0] == '$') && (str[1] == '$')) {
|
|
/*
|
|
* A dollar sign may be escaped 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, (Byte)str[0]);
|
|
str++;
|
|
|
|
} else if (str[0] == '$') {
|
|
/* Variable invocation. */
|
|
VarParser subvp = {
|
|
str,
|
|
str,
|
|
ctxt,
|
|
err,
|
|
TRUE
|
|
};
|
|
char *rval;
|
|
Boolean rfree;
|
|
|
|
rval = VarParse(&subvp, &rfree);
|
|
|
|
/*
|
|
* 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 (rval == var_Error || rval == 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 = subvp.ptr;
|
|
} else if (err) {
|
|
/*
|
|
* 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\"", subvp.ptr - subvp.input, str);
|
|
}
|
|
errorReported = TRUE;
|
|
str = subvp.ptr;
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)str[0]);
|
|
str++;
|
|
}
|
|
} else {
|
|
/*
|
|
* Copy all the characters from the variable
|
|
* value straight into the new string.
|
|
*/
|
|
Buf_Append(buf, rval);
|
|
if (rfree) {
|
|
free(rval);
|
|
}
|
|
str = subvp.ptr;
|
|
}
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)str[0]);
|
|
str++;
|
|
}
|
|
}
|
|
|
|
return (buf);
|
|
}
|
|
|
|
static int
|
|
match_var(const char str[], const char var[])
|
|
{
|
|
const char *start = str;
|
|
size_t len;
|
|
|
|
str++; /* consume '$' */
|
|
|
|
if (str[0] == OPEN_PAREN || str[0] == OPEN_BRACE) {
|
|
str++; /* consume opening paren or brace */
|
|
|
|
while (str[0] != '\0') {
|
|
if (str[0] == '$') {
|
|
/*
|
|
* A variable inside the variable. We cannot
|
|
* expand the external variable yet.
|
|
*/
|
|
return (str - start);
|
|
} else if (str[0] == ':' ||
|
|
str[0] == CLOSE_PAREN ||
|
|
str[0] == CLOSE_BRACE) {
|
|
len = str - (start + 2);
|
|
|
|
if (var[len] == '\0' && strncmp(var, start + 2, len) == 0) {
|
|
return (0); /* match */
|
|
} else {
|
|
/*
|
|
* Not the variable we want to
|
|
* expand.
|
|
*/
|
|
return (str - start);
|
|
}
|
|
} else {
|
|
++str;
|
|
}
|
|
}
|
|
return (str - start);
|
|
} else {
|
|
/* Single letter variable name */
|
|
if (var[1] == '\0' && var[0] == str[0]) {
|
|
return (0); /* match */
|
|
} else {
|
|
str++; /* consume variable name */
|
|
return (str - start);
|
|
}
|
|
}
|
|
}
|
|
|
|
Buffer *
|
|
Var_SubstOnly(const char *var, const char *str, GNode *ctxt, Boolean err)
|
|
{
|
|
Boolean errorReported;
|
|
Buffer *buf; /* Buffer for forming things */
|
|
|
|
/*
|
|
* Set TRUE if an error has already been reported to prevent a
|
|
* plethora of messages when recursing. XXXHB this comment sounds
|
|
* wrong.
|
|
*/
|
|
errorReported = FALSE;
|
|
|
|
buf = Buf_Init(0);
|
|
while (str[0] != '\0') {
|
|
if (str[0] == '$') {
|
|
int skip;
|
|
|
|
skip = match_var(str, var);
|
|
if (skip > 0) {
|
|
Buf_AddBytes(buf, skip, str);
|
|
str += skip;
|
|
} else {
|
|
/* Variable invocation. */
|
|
VarParser subvp = {
|
|
str,
|
|
str,
|
|
ctxt,
|
|
err,
|
|
TRUE
|
|
};
|
|
char *rval;
|
|
Boolean rfree;
|
|
|
|
rval = VarParse(&subvp, &rfree);
|
|
|
|
/*
|
|
* When we get down here, rval should either
|
|
* point to the value of this variable, or be
|
|
* NULL.
|
|
*/
|
|
if (rval == var_Error || rval == 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 = subvp.ptr;
|
|
} else if (err) {
|
|
/*
|
|
* 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\"", subvp.ptr - subvp.input, str);
|
|
}
|
|
errorReported = TRUE;
|
|
str = subvp.ptr;
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)str[0]);
|
|
str++;
|
|
}
|
|
} else {
|
|
/*
|
|
* Copy all the characters from the
|
|
* variable value straight into the
|
|
* new string.
|
|
*/
|
|
Buf_Append(buf, rval);
|
|
if (rfree) {
|
|
free(rval);
|
|
}
|
|
str = subvp.ptr;
|
|
}
|
|
}
|
|
} else {
|
|
Buf_AddByte(buf, (Byte)str[0]);
|
|
str++;
|
|
}
|
|
}
|
|
|
|
return (buf);
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Init --
|
|
* Initialize the module
|
|
*
|
|
* Results:
|
|
* None
|
|
*
|
|
* Side Effects:
|
|
* The VAR_CMD and VAR_GLOBAL contexts are created
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Init(char **env)
|
|
{
|
|
char **ptr;
|
|
|
|
VAR_CMD = Targ_NewGN("Command");
|
|
VAR_ENV = Targ_NewGN("Environment");
|
|
VAR_GLOBAL = Targ_NewGN("Global");
|
|
|
|
/*
|
|
* Copy user environment variables into ENV context.
|
|
*/
|
|
for (ptr = env; *ptr != NULL; ++ptr) {
|
|
char *tmp = estrdup(*ptr);
|
|
const char *name = tmp;
|
|
char *sep = strchr(name, '=');
|
|
const char *value = sep + 1;
|
|
|
|
if (sep != NULL) {
|
|
*sep = '\0';
|
|
VarAdd(name, value, VAR_ENV);
|
|
}
|
|
free(tmp);
|
|
}
|
|
}
|
|
|
|
/*-
|
|
*-----------------------------------------------------------------------
|
|
* Var_Dump --
|
|
* print all variables in a context
|
|
*-----------------------------------------------------------------------
|
|
*/
|
|
void
|
|
Var_Dump(void)
|
|
{
|
|
const LstNode *ln;
|
|
const Var *v;
|
|
|
|
printf("#*** Global Variables:\n");
|
|
LST_FOREACH(ln, &VAR_GLOBAL->context) {
|
|
v = Lst_Datum(ln);
|
|
printf("%-16s = %s\n", v->name, Buf_Data(v->val));
|
|
}
|
|
|
|
printf("#*** Command-line Variables:\n");
|
|
LST_FOREACH(ln, &VAR_CMD->context) {
|
|
v = Lst_Datum(ln);
|
|
printf("%-16s = %s\n", v->name, Buf_Data(v->val));
|
|
}
|
|
}
|
|
|