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1a2b743f6b
freebsd-src/var.c
Simon J. Gerraty 1a2b743f6b Import bmake-20200704 
from ChangeLog:

    (most of this by rillig@)
    o lots of style and white-space cleanup
    o lots more unit tests for variable modifiers
    o simplified description of some functions
    o str.c: refactor Str_Match
    o var.c: debugging output for :@
      constify VarModify parameter
      fix :hash modifier on 16-bit platforms
      remove unnecessary forward declarations
      refactor ApplyModifier_SysV to have less indentation
      simplify code for :E and :R
      clean up code for :H and :T
      refactor ApplyModifiers

    * var.c: we need stdint.h on some platforms to get uint32_t
    * unit-test/Makefile: we need to supress the specific error
    for RE substitution error in modmisc, since it varies accross
    different OS.
2020-07-08 18:32:15 +00:00

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/* $NetBSD: var.c,v 1.255 2020/07/04 17:41:04 rillig Exp $ */
/*
* Copyright (c) 1988, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef MAKE_NATIVE
static char rcsid[] = "$NetBSD: var.c,v 1.255 2020/07/04 17:41:04 rillig Exp $";
#else
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)var.c 8.3 (Berkeley) 3/19/94";
#else
__RCSID("$NetBSD: var.c,v 1.255 2020/07/04 17:41:04 rillig Exp $");
#endif
#endif /* not lint */
#endif
/*-
* var.c --
* Variable-handling functions
*
* Interface:
* Var_Set Set the value of a variable in the given
* context. The variable is created if it doesn't
* yet exist. The value and variable name need not
* be preserved.
*
* Var_Append Append more characters to an existing variable
* in the given context. The variable needn't
* exist already -- it will be created if it doesn't.
* A space is placed between the old value and the
* new one.
*
* Var_Exists See if a variable exists.
*
* Var_Value Return the value of a variable in a context or
* NULL if the variable is undefined.
*
* Var_Subst Substitute either a single variable or all
* variables in a string, using the given context as
* the top-most one.
*
* Var_Parse Parse a variable expansion from a string and
* return the result and the number of characters
* consumed.
*
* Var_Delete Delete a variable in a context.
*
* Var_Init Initialize this module.
*
* Debugging:
* Var_Dump Print out all variables defined in the given
* context.
*
* XXX: There's a lot of duplication in these functions.
*/
#include <sys/stat.h>
#include <sys/types.h>
#ifndef NO_REGEX
#include <regex.h>
#endif
#include <ctype.h>
#include <stdlib.h>
#include <limits.h>
#include <time.h>
#include "make.h"
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include "buf.h"
#include "dir.h"
#include "job.h"
#include "metachar.h"
extern int makelevel;
/*
* This lets us tell if we have replaced the original environ
* (which we cannot free).
*/
char **savedEnv = NULL;
/*
* This is a harmless return value for Var_Parse that can be used by Var_Subst
* to determine if there was an error in parsing -- easier than returning
* a flag, as things outside this module don't give a hoot.
*/
char var_Error[] = "";
/*
* Similar to var_Error, but returned when the 'VARF_UNDEFERR' flag for
* Var_Parse is not set. Why not just use a constant? Well, gcc likes
* to condense identical string instances...
*/
static char varNoError[] = "";
/*
* Traditionally we consume $$ during := like any other expansion.
* Other make's do not.
* This knob allows controlling the behavior.
* FALSE for old behavior.
* TRUE for new compatible.
*/
#define SAVE_DOLLARS ".MAKE.SAVE_DOLLARS"
static Boolean save_dollars = FALSE;
/*
* Internally, variables are contained in four different contexts.
* 1) the environment. They may not be changed. If an environment
* variable is appended-to, the result is placed in the global
* context.
* 2) the global context. Variables set in the Makefile are located in
* the global context. It is the penultimate context searched when
* substituting.
* 3) the command-line context. All variables set on the command line
* are placed in this context. They are UNALTERABLE once placed here.
* 4) the local context. Each target has associated with it a context
* list. On this list are located the structures describing such
* local variables as $(@) and $(*)
* The four contexts are searched in the reverse order from which they are
* listed.
*/
GNode *VAR_INTERNAL; /* variables from make itself */
GNode *VAR_GLOBAL; /* variables from the makefile */
GNode *VAR_CMD; /* variables defined on the command-line */
#define FIND_CMD 0x1 /* look in VAR_CMD when searching */
#define FIND_GLOBAL 0x2 /* look in VAR_GLOBAL as well */
#define FIND_ENV 0x4 /* look in the environment also */
typedef enum {
VAR_IN_USE = 0x01, /* Variable's value is currently being used.
* Used to avoid endless recursion */
VAR_FROM_ENV = 0x02, /* Variable comes from the environment */
VAR_JUNK = 0x04, /* Variable is a junk variable that
* should be destroyed when done with
* it. Used by Var_Parse for undefined,
* modified variables */
VAR_KEEP = 0x08, /* Variable is VAR_JUNK, but we found
* a use for it in some modifier and
* the value is therefore valid */
VAR_EXPORTED = 0x10, /* Variable is exported */
VAR_REEXPORT = 0x20, /* Indicate if var needs re-export.
* This would be true if it contains $'s */
VAR_FROM_CMD = 0x40 /* Variable came from command line */
} Var_Flags;
typedef struct Var {
char *name; /* the variable's name */
Buffer val; /* its value */
Var_Flags flags; /* miscellaneous status flags */
} Var;
/*
* Exporting vars is expensive so skip it if we can
*/
#define VAR_EXPORTED_NONE 0
#define VAR_EXPORTED_YES 1
#define VAR_EXPORTED_ALL 2
static int var_exportedVars = VAR_EXPORTED_NONE;
/*
* We pass this to Var_Export when doing the initial export
* or after updating an exported var.
*/
#define VAR_EXPORT_PARENT 1
/*
* We pass this to Var_Export1 to tell it to leave the value alone.
*/
#define VAR_EXPORT_LITERAL 2
typedef enum {
VAR_SUB_GLOBAL = 0x01, /* Apply substitution globally */
VAR_SUB_ONE = 0x02, /* Apply substitution to one word */
VAR_SUB_MATCHED = 0x04, /* There was a match */
VAR_MATCH_START = 0x08, /* Match at start of word */
VAR_MATCH_END = 0x10, /* Match at end of word */
VAR_NOSUBST = 0x20 /* don't expand vars in VarGetPattern */
} VarPattern_Flags;
typedef enum {
VAR_NO_EXPORT = 0x01 /* do not export */
} VarSet_Flags;
typedef struct {
/*
* The following fields are set by Var_Parse() when it
* encounters modifiers that need to keep state for use by
* subsequent modifiers within the same variable expansion.
*/
Byte varSpace; /* Word separator in expansions */
Boolean oneBigWord; /* TRUE if we will treat the variable as a
* single big word, even if it contains
* embedded spaces (as opposed to the
* usual behaviour of treating it as
* several space-separated words). */
} Var_Parse_State;
/* struct passed as 'void *' to VarSubstitute() for ":S/lhs/rhs/",
* to VarSYSVMatch() for ":lhs=rhs". */
typedef struct {
const char *lhs; /* String to match */
int leftLen; /* Length of string */
const char *rhs; /* Replacement string (w/ &'s removed) */
int rightLen; /* Length of replacement */
VarPattern_Flags flags;
} VarPattern;
/* struct passed as 'void *' to VarLoopExpand() for ":@tvar@str@" */
typedef struct {
GNode *ctxt; /* variable context */
char *tvar; /* name of temp var */
int tvarLen;
char *str; /* string to expand */
int strLen;
Varf_Flags flags;
} VarLoop;
#ifndef NO_REGEX
/* struct passed as 'void *' to VarRESubstitute() for ":C///" */
typedef struct {
regex_t re;
int nsub;
regmatch_t *matches;
char *replace;
int flags;
} VarREPattern;
#endif
/* struct passed to VarSelectWords() for ":[start..end]" */
typedef struct {
int start; /* first word to select */
int end; /* last word to select */
} VarSelectWords_t;
#define BROPEN '{'
#define BRCLOSE '}'
#define PROPEN '('
#define PRCLOSE ')'
/*-
*-----------------------------------------------------------------------
* VarFind --
* Find the given variable in the given context and any other contexts
* indicated.
*
* Input:
* name name to find
* ctxt context in which to find it
* flags FIND_GLOBAL set means to look in the
* VAR_GLOBAL context as well. FIND_CMD set means
* to look in the VAR_CMD context also. FIND_ENV
* set means to look in the environment
*
* Results:
* A pointer to the structure describing the desired variable or
* NULL if the variable does not exist.
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
static Var *
VarFind(const char *name, GNode *ctxt, int flags)
{
Hash_Entry *var;
Var *v;
/*
* If the variable name begins with a '.', it could very well be one of
* the local ones. We check the name against all the local variables
* and substitute the short version in for 'name' if it matches one of
* them.
*/
if (*name == '.' && isupper((unsigned char) name[1])) {
switch (name[1]) {
case 'A':
if (!strcmp(name, ".ALLSRC"))
name = ALLSRC;
if (!strcmp(name, ".ARCHIVE"))
name = ARCHIVE;
break;
case 'I':
if (!strcmp(name, ".IMPSRC"))
name = IMPSRC;
break;
case 'M':
if (!strcmp(name, ".MEMBER"))
name = MEMBER;
break;
case 'O':
if (!strcmp(name, ".OODATE"))
name = OODATE;
break;
case 'P':
if (!strcmp(name, ".PREFIX"))
name = PREFIX;
break;
case 'T':
if (!strcmp(name, ".TARGET"))
name = TARGET;
break;
}
}
#ifdef notyet
/* for compatibility with gmake */
if (name[0] == '^' && name[1] == '\0')
name = ALLSRC;
#endif
/*
* First look for the variable in the given context. If it's not there,
* look for it in VAR_CMD, VAR_GLOBAL and the environment, in that order,
* depending on the FIND_* flags in 'flags'
*/
var = Hash_FindEntry(&ctxt->context, name);
if (var == NULL && (flags & FIND_CMD) && ctxt != VAR_CMD) {
var = Hash_FindEntry(&VAR_CMD->context, name);
}
if (!checkEnvFirst && var == NULL && (flags & FIND_GLOBAL) &&
ctxt != VAR_GLOBAL)
{
var = Hash_FindEntry(&VAR_GLOBAL->context, name);
if (var == NULL && ctxt != VAR_INTERNAL) {
/* VAR_INTERNAL is subordinate to VAR_GLOBAL */
var = Hash_FindEntry(&VAR_INTERNAL->context, name);
}
}
if (var == NULL && (flags & FIND_ENV)) {
char *env;
if ((env = getenv(name)) != NULL) {
int len;
v = bmake_malloc(sizeof(Var));
v->name = bmake_strdup(name);
len = strlen(env);
Buf_Init(&v->val, len + 1);
Buf_AddBytes(&v->val, len, env);
v->flags = VAR_FROM_ENV;
return v;
} else if (checkEnvFirst && (flags & FIND_GLOBAL) &&
ctxt != VAR_GLOBAL)
{
var = Hash_FindEntry(&VAR_GLOBAL->context, name);
if (var == NULL && ctxt != VAR_INTERNAL) {
var = Hash_FindEntry(&VAR_INTERNAL->context, name);
}
if (var == NULL) {
return NULL;
} else {
return (Var *)Hash_GetValue(var);
}
} else {
return NULL;
}
} else if (var == NULL) {
return NULL;
} else {
return (Var *)Hash_GetValue(var);
}
}
/*-
*-----------------------------------------------------------------------
* VarFreeEnv --
* If the variable is an environment variable, free it
*
* Input:
* v the variable
* destroy true if the value buffer should be destroyed.
*
* Results:
* 1 if it is an environment variable 0 ow.
*
* Side Effects:
* The variable is free'ed if it is an environent variable.
*-----------------------------------------------------------------------
*/
static Boolean
VarFreeEnv(Var *v, Boolean destroy)
{
if ((v->flags & VAR_FROM_ENV) == 0)
return FALSE;
free(v->name);
Buf_Destroy(&v->val, destroy);
free(v);
return TRUE;
}
/*-
*-----------------------------------------------------------------------
* VarAdd --
* Add a new variable of name name and value val to the given context
*
* Input:
* name name of variable to add
* val value to set it to
* ctxt context in which to set it
*
* Side Effects:
* The new variable is placed at the front of the given context
* The name and val arguments are duplicated so they may
* safely be freed.
*-----------------------------------------------------------------------
*/
static void
VarAdd(const char *name, const char *val, GNode *ctxt)
{
Var *v;
int len;
Hash_Entry *h;
v = bmake_malloc(sizeof(Var));
len = val ? strlen(val) : 0;
Buf_Init(&v->val, len + 1);
Buf_AddBytes(&v->val, len, val);
v->flags = 0;
h = Hash_CreateEntry(&ctxt->context, name, NULL);
Hash_SetValue(h, v);
v->name = h->name;
if (DEBUG(VAR) && (ctxt->flags & INTERNAL) == 0) {
fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
}
}
/*-
*-----------------------------------------------------------------------
* Var_Delete --
* Remove a variable from a context.
*
* Side Effects:
* The Var structure is removed and freed.
*
*-----------------------------------------------------------------------
*/
void
Var_Delete(const char *name, GNode *ctxt)
{
Hash_Entry *ln;
char *cp;
if (strchr(name, '$')) {
cp = Var_Subst(NULL, name, VAR_GLOBAL, VARF_WANTRES);
} else {
cp = (char *)name;
}
ln = Hash_FindEntry(&ctxt->context, cp);
if (DEBUG(VAR)) {
fprintf(debug_file, "%s:delete %s%s\n",
ctxt->name, cp, ln ? "" : " (not found)");
}
if (cp != name) {
free(cp);
}
if (ln != NULL) {
Var *v;
v = (Var *)Hash_GetValue(ln);
if ((v->flags & VAR_EXPORTED)) {
unsetenv(v->name);
}
if (strcmp(MAKE_EXPORTED, v->name) == 0) {
var_exportedVars = VAR_EXPORTED_NONE;
}
if (v->name != ln->name)
free(v->name);
Hash_DeleteEntry(&ctxt->context, ln);
Buf_Destroy(&v->val, TRUE);
free(v);
}
}
/*
* Export a var.
* We ignore make internal variables (those which start with '.')
* Also we jump through some hoops to avoid calling setenv
* more than necessary since it can leak.
* We only manipulate flags of vars if 'parent' is set.
*/
static int
Var_Export1(const char *name, int flags)
{
char tmp[BUFSIZ];
Var *v;
char *val = NULL;
int n;
int parent = (flags & VAR_EXPORT_PARENT);
if (*name == '.')
return 0; /* skip internals */
if (!name[1]) {
/*
* A single char.
* If it is one of the vars that should only appear in
* local context, skip it, else we can get Var_Subst
* into a loop.
*/
switch (name[0]) {
case '@':
case '%':
case '*':
case '!':
return 0;
}
}
v = VarFind(name, VAR_GLOBAL, 0);
if (v == NULL) {
return 0;
}
if (!parent &&
(v->flags & (VAR_EXPORTED|VAR_REEXPORT)) == VAR_EXPORTED) {
return 0; /* nothing to do */
}
val = Buf_GetAll(&v->val, NULL);
if ((flags & VAR_EXPORT_LITERAL) == 0 && strchr(val, '$')) {
if (parent) {
/*
* Flag this as something we need to re-export.
* No point actually exporting it now though,
* the child can do it at the last minute.
*/
v->flags |= (VAR_EXPORTED|VAR_REEXPORT);
return 1;
}
if (v->flags & VAR_IN_USE) {
/*
* We recursed while exporting in a child.
* This isn't going to end well, just skip it.
*/
return 0;
}
n = snprintf(tmp, sizeof(tmp), "${%s}", name);
if (n < (int)sizeof(tmp)) {
val = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
setenv(name, val, 1);
free(val);
}
} else {
if (parent) {
v->flags &= ~VAR_REEXPORT; /* once will do */
}
if (parent || !(v->flags & VAR_EXPORTED)) {
setenv(name, val, 1);
}
}
/*
* This is so Var_Set knows to call Var_Export again...
*/
if (parent) {
v->flags |= VAR_EXPORTED;
}
return 1;
}
static void
Var_ExportVars_callback(void *entry, void *unused MAKE_ATTR_UNUSED)
{
Var *var = entry;
Var_Export1(var->name, 0);
}
/*
* This gets called from our children.
*/
void
Var_ExportVars(void)
{
char tmp[BUFSIZ];
char *val;
int n;
/*
* Several make's support this sort of mechanism for tracking
* recursion - but each uses a different name.
* We allow the makefiles to update MAKELEVEL and ensure
* children see a correctly incremented value.
*/
snprintf(tmp, sizeof(tmp), "%d", makelevel + 1);
setenv(MAKE_LEVEL_ENV, tmp, 1);
if (VAR_EXPORTED_NONE == var_exportedVars)
return;
if (VAR_EXPORTED_ALL == var_exportedVars) {
/* Ouch! This is crazy... */
Hash_ForEach(&VAR_GLOBAL->context, Var_ExportVars_callback, NULL);
return;
}
/*
* We have a number of exported vars,
*/
n = snprintf(tmp, sizeof(tmp), "${" MAKE_EXPORTED ":O:u}");
if (n < (int)sizeof(tmp)) {
char **av;
char *as;
int ac;
int i;
val = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
if (*val) {
av = brk_string(val, &ac, FALSE, &as);
for (i = 0; i < ac; i++) {
Var_Export1(av[i], 0);
}
free(as);
free(av);
}
free(val);
}
}
/*
* This is called when .export is seen or
* .MAKE.EXPORTED is modified.
* It is also called when any exported var is modified.
*/
void
Var_Export(char *str, int isExport)
{
char *name;
char *val;
char **av;
char *as;
int flags;
int ac;
int i;
if (isExport && (!str || !str[0])) {
var_exportedVars = VAR_EXPORTED_ALL; /* use with caution! */
return;
}
flags = 0;
if (strncmp(str, "-env", 4) == 0) {
str += 4;
} else if (strncmp(str, "-literal", 8) == 0) {
str += 8;
flags |= VAR_EXPORT_LITERAL;
} else {
flags |= VAR_EXPORT_PARENT;
}
val = Var_Subst(NULL, str, VAR_GLOBAL, VARF_WANTRES);
if (*val) {
av = brk_string(val, &ac, FALSE, &as);
for (i = 0; i < ac; i++) {
name = av[i];
if (!name[1]) {
/*
* A single char.
* If it is one of the vars that should only appear in
* local context, skip it, else we can get Var_Subst
* into a loop.
*/
switch (name[0]) {
case '@':
case '%':
case '*':
case '!':
continue;
}
}
if (Var_Export1(name, flags)) {
if (VAR_EXPORTED_ALL != var_exportedVars)
var_exportedVars = VAR_EXPORTED_YES;
if (isExport && (flags & VAR_EXPORT_PARENT)) {
Var_Append(MAKE_EXPORTED, name, VAR_GLOBAL);
}
}
}
free(as);
free(av);
}
free(val);
}
/*
* This is called when .unexport[-env] is seen.
*/
extern char **environ;
void
Var_UnExport(char *str)
{
char tmp[BUFSIZ];
char *vlist;
char *cp;
Boolean unexport_env;
int n;
if (!str || !str[0]) {
return; /* assert? */
}
vlist = NULL;
str += 8;
unexport_env = (strncmp(str, "-env", 4) == 0);
if (unexport_env) {
char **newenv;
cp = getenv(MAKE_LEVEL_ENV); /* we should preserve this */
if (environ == savedEnv) {
/* we have been here before! */
newenv = bmake_realloc(environ, 2 * sizeof(char *));
} else {
if (savedEnv) {
free(savedEnv);
savedEnv = NULL;
}
newenv = bmake_malloc(2 * sizeof(char *));
}
if (!newenv)
return;
/* Note: we cannot safely free() the original environ. */
environ = savedEnv = newenv;
newenv[0] = NULL;
newenv[1] = NULL;
if (cp && *cp)
setenv(MAKE_LEVEL_ENV, cp, 1);
} else {
for (; *str != '\n' && isspace((unsigned char) *str); str++)
continue;
if (str[0] && str[0] != '\n') {
vlist = str;
}
}
if (!vlist) {
/* Using .MAKE.EXPORTED */
n = snprintf(tmp, sizeof(tmp), "${" MAKE_EXPORTED ":O:u}");
if (n < (int)sizeof(tmp)) {
vlist = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
}
}
if (vlist) {
Var *v;
char **av;
char *as;
int ac;
int i;
av = brk_string(vlist, &ac, FALSE, &as);
for (i = 0; i < ac; i++) {
v = VarFind(av[i], VAR_GLOBAL, 0);
if (!v)
continue;
if (!unexport_env &&
(v->flags & (VAR_EXPORTED|VAR_REEXPORT)) == VAR_EXPORTED) {
unsetenv(v->name);
}
v->flags &= ~(VAR_EXPORTED|VAR_REEXPORT);
/*
* If we are unexporting a list,
* remove each one from .MAKE.EXPORTED.
* If we are removing them all,
* just delete .MAKE.EXPORTED below.
*/
if (vlist == str) {
n = snprintf(tmp, sizeof(tmp),
"${" MAKE_EXPORTED ":N%s}", v->name);
if (n < (int)sizeof(tmp)) {
cp = Var_Subst(NULL, tmp, VAR_GLOBAL, VARF_WANTRES);
Var_Set(MAKE_EXPORTED, cp, VAR_GLOBAL);
free(cp);
}
}
}
free(as);
free(av);
if (vlist != str) {
Var_Delete(MAKE_EXPORTED, VAR_GLOBAL);
free(vlist);
}
}
}
static void
Var_Set_with_flags(const char *name, const char *val, GNode *ctxt,
VarSet_Flags flags)
{
Var *v;
char *expanded_name = NULL;
/*
* We only look for a variable in the given context since anything set
* here will override anything in a lower context, so there's not much
* point in searching them all just to save a bit of memory...
*/
if (strchr(name, '$') != NULL) {
expanded_name = Var_Subst(NULL, name, ctxt, VARF_WANTRES);
if (expanded_name[0] == 0) {
if (DEBUG(VAR)) {
fprintf(debug_file, "Var_Set(\"%s\", \"%s\", ...) "
"name expands to empty string - ignored\n",
name, val);
}
free(expanded_name);
return;
}
name = expanded_name;
}
if (ctxt == VAR_GLOBAL) {
v = VarFind(name, VAR_CMD, 0);
if (v != NULL) {
if ((v->flags & VAR_FROM_CMD)) {
if (DEBUG(VAR)) {
fprintf(debug_file, "%s:%s = %s ignored!\n", ctxt->name, name, val);
}
goto out;
}
VarFreeEnv(v, TRUE);
}
}
v = VarFind(name, ctxt, 0);
if (v == NULL) {
if (ctxt == VAR_CMD && (flags & VAR_NO_EXPORT) == 0) {
/*
* This var would normally prevent the same name being added
* to VAR_GLOBAL, so delete it from there if needed.
* Otherwise -V name may show the wrong value.
*/
Var_Delete(name, VAR_GLOBAL);
}
VarAdd(name, val, ctxt);
} else {
Buf_Empty(&v->val);
if (val)
Buf_AddBytes(&v->val, strlen(val), val);
if (DEBUG(VAR)) {
fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name, val);
}
if ((v->flags & VAR_EXPORTED)) {
Var_Export1(name, VAR_EXPORT_PARENT);
}
}
/*
* Any variables given on the command line are automatically exported
* to the environment (as per POSIX standard)
*/
if (ctxt == VAR_CMD && (flags & VAR_NO_EXPORT) == 0) {
if (v == NULL) {
/* we just added it */
v = VarFind(name, ctxt, 0);
}
if (v != NULL)
v->flags |= VAR_FROM_CMD;
/*
* If requested, don't export these in the environment
* individually. We still put them in MAKEOVERRIDES so
* that the command-line settings continue to override
* Makefile settings.
*/
if (varNoExportEnv != TRUE)
setenv(name, val ? val : "", 1);
Var_Append(MAKEOVERRIDES, name, VAR_GLOBAL);
}
if (*name == '.') {
if (strcmp(name, SAVE_DOLLARS) == 0)
save_dollars = s2Boolean(val, save_dollars);
}
out:
free(expanded_name);
if (v != NULL)
VarFreeEnv(v, TRUE);
}
/*-
*-----------------------------------------------------------------------
* Var_Set --
* Set the variable name to the value val in the given context.
*
* Input:
* name name of variable to set
* val value to give to the variable
* ctxt context in which to set it
*
* Side Effects:
* If the variable doesn't yet exist, a new record is created for it.
* Else the old value is freed and the new one stuck in its place
*
* Notes:
* The variable is searched for only in its context before being
* created in that context. I.e. if the context is VAR_GLOBAL,
* only VAR_GLOBAL->context is searched. Likewise if it is VAR_CMD, only
* VAR_CMD->context is searched. This is done to avoid the literally
* thousands of unnecessary strcmp's that used to be done to
* set, say, $(@) or $(<).
* If the context is VAR_GLOBAL though, we check if the variable
* was set in VAR_CMD from the command line and skip it if so.
*-----------------------------------------------------------------------
*/
void
Var_Set(const char *name, const char *val, GNode *ctxt)
{
Var_Set_with_flags(name, val, ctxt, 0);
}
/*-
*-----------------------------------------------------------------------
* Var_Append --
* The variable of the given name has the given value appended to it in
* the given context.
*
* Input:
* name name of variable to modify
* val String to append to it
* ctxt Context in which this should occur
*
* Side Effects:
* If the variable doesn't exist, it is created. Else the strings
* are concatenated (with a space in between).
*
* Notes:
* Only if the variable is being sought in the global context is the
* environment searched.
* XXX: Knows its calling circumstances in that if called with ctxt
* an actual target, it will only search that context since only
* a local variable could be being appended to. This is actually
* a big win and must be tolerated.
*-----------------------------------------------------------------------
*/
void
Var_Append(const char *name, const char *val, GNode *ctxt)
{
Var *v;
Hash_Entry *h;
char *expanded_name = NULL;
if (strchr(name, '$') != NULL) {
expanded_name = Var_Subst(NULL, name, ctxt, VARF_WANTRES);
if (expanded_name[0] == 0) {
if (DEBUG(VAR)) {
fprintf(debug_file, "Var_Append(\"%s\", \"%s\", ...) "
"name expands to empty string - ignored\n",
name, val);
}
free(expanded_name);
return;
}
name = expanded_name;
}
v = VarFind(name, ctxt, ctxt == VAR_GLOBAL ? (FIND_CMD|FIND_ENV) : 0);
if (v == NULL) {
Var_Set(name, val, ctxt);
} else if (ctxt == VAR_CMD || !(v->flags & VAR_FROM_CMD)) {
Buf_AddByte(&v->val, ' ');
Buf_AddBytes(&v->val, strlen(val), val);
if (DEBUG(VAR)) {
fprintf(debug_file, "%s:%s = %s\n", ctxt->name, name,
Buf_GetAll(&v->val, NULL));
}
if (v->flags & VAR_FROM_ENV) {
/*
* If the original variable came from the environment, we
* have to install it in the global context (we could place
* it in the environment, but then we should provide a way to
* export other variables...)
*/
v->flags &= ~VAR_FROM_ENV;
h = Hash_CreateEntry(&ctxt->context, name, NULL);
Hash_SetValue(h, v);
}
}
free(expanded_name);
}
/*-
*-----------------------------------------------------------------------
* Var_Exists --
* See if the given variable exists.
*
* Input:
* name Variable to find
* ctxt Context in which to start search
*
* Results:
* TRUE if it does, FALSE if it doesn't
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
Boolean
Var_Exists(const char *name, GNode *ctxt)
{
Var *v;
char *cp;
if ((cp = strchr(name, '$')) != NULL) {
cp = Var_Subst(NULL, name, ctxt, VARF_WANTRES);
}
v = VarFind(cp ? cp : name, ctxt, FIND_CMD|FIND_GLOBAL|FIND_ENV);
free(cp);
if (v == NULL) {
return FALSE;
}
(void)VarFreeEnv(v, TRUE);
return TRUE;
}
/*-
*-----------------------------------------------------------------------
* Var_Value --
* Return the value of the named variable in the given context
*
* Input:
* name name to find
* ctxt context in which to search for it
*
* Results:
* The value if the variable exists, NULL if it doesn't
*
* Side Effects:
* None
*-----------------------------------------------------------------------
*/
char *
Var_Value(const char *name, GNode *ctxt, char **frp)
{
Var *v;
v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
*frp = NULL;
if (v == NULL)
return NULL;
char *p = (Buf_GetAll(&v->val, NULL));
if (VarFreeEnv(v, FALSE))
*frp = p;
return p;
}
/* This callback for VarModify gets a single word from an expression and
* typically adds a modification of this word to the buffer. It may also do
* nothing or add several words.
*
* If addSpaces is TRUE, it must add a space before adding anything else to
* the buffer.
*
* It returns the addSpace value for the next call of this callback. Typical
* return values are the current addSpaces or TRUE. */
typedef Boolean (*VarModifyCallback)(GNode *ctxt, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf, void *data);
/* Callback function for VarModify to implement the :H modifier.
* Add the dirname of the given word to the buffer. */
static Boolean
VarHead(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *dummy MAKE_ATTR_UNUSED)
{
const char *slash = strrchr(word, '/');
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
if (slash != NULL)
Buf_AddBytes(buf, slash - word, word);
else
Buf_AddByte(buf, '.');
return TRUE;
}
/* Callback function for VarModify to implement the :T modifier.
* Add the basename of the given word to the buffer. */
static Boolean
VarTail(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *dummy MAKE_ATTR_UNUSED)
{
const char *slash = strrchr(word, '/');
const char *base = slash != NULL ? slash + 1 : word;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
Buf_AddBytes(buf, strlen(base), base);
return TRUE;
}
/* Callback function for VarModify to implement the :E modifier.
* Add the filename suffix of the given word to the buffer, if it exists. */
static Boolean
VarSuffix(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *dummy MAKE_ATTR_UNUSED)
{
const char *dot = strrchr(word, '.');
if (dot == NULL)
return addSpace;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
Buf_AddBytes(buf, strlen(dot + 1), dot + 1);
return TRUE;
}
/* Callback function for VarModify to implement the :R modifier.
* Add the filename basename of the given word to the buffer. */
static Boolean
VarRoot(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *dummy MAKE_ATTR_UNUSED)
{
char *dot = strrchr(word, '.');
size_t len = dot != NULL ? (size_t)(dot - word) : strlen(word);
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
Buf_AddBytes(buf, len, word);
return TRUE;
}
/* Callback function for VarModify to implement the :M modifier.
* Place the word in the buffer if it matches the given pattern. */
static Boolean
VarMatch(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
const char *pattern = data;
if (DEBUG(VAR))
fprintf(debug_file, "VarMatch [%s] [%s]\n", word, pattern);
if (!Str_Match(word, pattern))
return addSpace;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
Buf_AddBytes(buf, strlen(word), word);
return TRUE;
}
#ifdef SYSVVARSUB
/* Callback function for VarModify to implement the :%.from=%.to modifier. */
static Boolean
VarSYSVMatch(GNode *ctx, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
size_t len;
char *ptr;
Boolean hasPercent;
VarPattern *pat = data;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
if ((ptr = Str_SYSVMatch(word, pat->lhs, &len, &hasPercent)) != NULL) {
char *varexp = Var_Subst(NULL, pat->rhs, ctx, VARF_WANTRES);
Str_SYSVSubst(buf, varexp, ptr, len, hasPercent);
free(varexp);
} else {
Buf_AddBytes(buf, strlen(word), word);
}
return TRUE;
}
#endif
/* Callback function for VarModify to implement the :N modifier.
* Place the word in the buffer if it doesn't match the given pattern. */
static Boolean
VarNoMatch(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
const char *pattern = data;
if (Str_Match(word, pattern))
return addSpace;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
Buf_AddBytes(buf, strlen(word), word);
return TRUE;
}
/* Callback function for VarModify to implement the :S,from,to, modifier.
* Perform a string substitution on the given word. */
static Boolean
VarSubstitute(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
int wordLen = strlen(word);
const char *cp; /* General pointer */
VarPattern *pattern = data;
if ((pattern->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) !=
(VAR_SUB_ONE|VAR_SUB_MATCHED)) {
/*
* Still substituting -- break it down into simple anchored cases
* and if none of them fits, perform the general substitution case.
*/
if ((pattern->flags & VAR_MATCH_START) &&
(strncmp(word, pattern->lhs, pattern->leftLen) == 0)) {
/*
* Anchored at start and beginning of word matches pattern
*/
if ((pattern->flags & VAR_MATCH_END) &&
(wordLen == pattern->leftLen)) {
/*
* Also anchored at end and matches to the end (word
* is same length as pattern) add space and rhs only
* if rhs is non-null.
*/
if (pattern->rightLen != 0) {
if (addSpace && vpstate->varSpace) {
Buf_AddByte(buf, vpstate->varSpace);
}
addSpace = TRUE;
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
}
pattern->flags |= VAR_SUB_MATCHED;
} else if (pattern->flags & VAR_MATCH_END) {
/*
* Doesn't match to end -- copy word wholesale
*/
goto nosub;
} else {
/*
* Matches at start but need to copy in trailing characters
*/
if ((pattern->rightLen + wordLen - pattern->leftLen) != 0) {
if (addSpace && vpstate->varSpace) {
Buf_AddByte(buf, vpstate->varSpace);
}
addSpace = TRUE;
}
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
Buf_AddBytes(buf, wordLen - pattern->leftLen,
(word + pattern->leftLen));
pattern->flags |= VAR_SUB_MATCHED;
}
} else if (pattern->flags & VAR_MATCH_START) {
/*
* Had to match at start of word and didn't -- copy whole word.
*/
goto nosub;
} else if (pattern->flags & VAR_MATCH_END) {
/*
* Anchored at end, Find only place match could occur (leftLen
* characters from the end of the word) and see if it does. Note
* that because the $ will be left at the end of the lhs, we have
* to use strncmp.
*/
cp = word + (wordLen - pattern->leftLen);
if ((cp >= word) &&
(strncmp(cp, pattern->lhs, pattern->leftLen) == 0)) {
/*
* Match found. If we will place characters in the buffer,
* add a space before hand as indicated by addSpace, then
* stuff in the initial, unmatched part of the word followed
* by the right-hand-side.
*/
if (((cp - word) + pattern->rightLen) != 0) {
if (addSpace && vpstate->varSpace) {
Buf_AddByte(buf, vpstate->varSpace);
}
addSpace = TRUE;
}
Buf_AddBytes(buf, cp - word, word);
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
pattern->flags |= VAR_SUB_MATCHED;
} else {
/*
* Had to match at end and didn't. Copy entire word.
*/
goto nosub;
}
} else {
/*
* Pattern is unanchored: search for the pattern in the word using
* String_FindSubstring, copying unmatched portions and the
* right-hand-side for each match found, handling non-global
* substitutions correctly, etc. When the loop is done, any
* remaining part of the word (word and wordLen are adjusted
* accordingly through the loop) is copied straight into the
* buffer.
* addSpace is set FALSE as soon as a space is added to the
* buffer.
*/
Boolean done;
int origSize;
done = FALSE;
origSize = Buf_Size(buf);
while (!done) {
cp = Str_FindSubstring(word, pattern->lhs);
if (cp != NULL) {
if (addSpace && (((cp - word) + pattern->rightLen) != 0)) {
Buf_AddByte(buf, vpstate->varSpace);
addSpace = FALSE;
}
Buf_AddBytes(buf, cp - word, word);
Buf_AddBytes(buf, pattern->rightLen, pattern->rhs);
wordLen -= (cp - word) + pattern->leftLen;
word = cp + pattern->leftLen;
if (wordLen == 0) {
done = TRUE;
}
if ((pattern->flags & VAR_SUB_GLOBAL) == 0) {
done = TRUE;
}
pattern->flags |= VAR_SUB_MATCHED;
} else {
done = TRUE;
}
}
if (wordLen != 0) {
if (addSpace && vpstate->varSpace) {
Buf_AddByte(buf, vpstate->varSpace);
}
Buf_AddBytes(buf, wordLen, word);
}
/*
* If added characters to the buffer, need to add a space
* before we add any more. If we didn't add any, just return
* the previous value of addSpace.
*/
return (Buf_Size(buf) != origSize) || addSpace;
}
return addSpace;
}
nosub:
if (addSpace && vpstate->varSpace) {
Buf_AddByte(buf, vpstate->varSpace);
}
Buf_AddBytes(buf, wordLen, word);
return TRUE;
}
#ifndef NO_REGEX
/*-
*-----------------------------------------------------------------------
* VarREError --
* Print the error caused by a regcomp or regexec call.
*
* Side Effects:
* An error gets printed.
*
*-----------------------------------------------------------------------
*/
static void
VarREError(int reerr, regex_t *pat, const char *str)
{
char *errbuf;
int errlen;
errlen = regerror(reerr, pat, 0, 0);
errbuf = bmake_malloc(errlen);
regerror(reerr, pat, errbuf, errlen);
Error("%s: %s", str, errbuf);
free(errbuf);
}
/* Callback function for VarModify to implement the :C/from/to/ modifier.
* Perform a regex substitution on the given word. */
static Boolean
VarRESubstitute(GNode *ctx MAKE_ATTR_UNUSED,
Var_Parse_State *vpstate MAKE_ATTR_UNUSED,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
VarREPattern *pat = data;
int xrv;
const char *wp = word;
char *rp;
int added = 0;
int flags = 0;
#define MAYBE_ADD_SPACE() \
if (addSpace && !added) \
Buf_AddByte(buf, ' '); \
added = 1
if ((pat->flags & (VAR_SUB_ONE|VAR_SUB_MATCHED)) ==
(VAR_SUB_ONE|VAR_SUB_MATCHED))
xrv = REG_NOMATCH;
else {
tryagain:
xrv = regexec(&pat->re, wp, pat->nsub, pat->matches, flags);
}
switch (xrv) {
case 0:
pat->flags |= VAR_SUB_MATCHED;
if (pat->matches[0].rm_so > 0) {
MAYBE_ADD_SPACE();
Buf_AddBytes(buf, pat->matches[0].rm_so, wp);
}
for (rp = pat->replace; *rp; rp++) {
if ((*rp == '\\') && ((rp[1] == '&') || (rp[1] == '\\'))) {
MAYBE_ADD_SPACE();
Buf_AddByte(buf, rp[1]);
rp++;
} else if ((*rp == '&') ||
((*rp == '\\') && isdigit((unsigned char)rp[1]))) {
int n;
const char *subbuf;
int sublen;
char errstr[3];
if (*rp == '&') {
n = 0;
errstr[0] = '&';
errstr[1] = '\0';
} else {
n = rp[1] - '0';
errstr[0] = '\\';
errstr[1] = rp[1];
errstr[2] = '\0';
rp++;
}
if (n > pat->nsub) {
Error("No subexpression %s", &errstr[0]);
subbuf = "";
sublen = 0;
} else if ((pat->matches[n].rm_so == -1) &&
(pat->matches[n].rm_eo == -1)) {
Error("No match for subexpression %s", &errstr[0]);
subbuf = "";
sublen = 0;
} else {
subbuf = wp + pat->matches[n].rm_so;
sublen = pat->matches[n].rm_eo - pat->matches[n].rm_so;
}
if (sublen > 0) {
MAYBE_ADD_SPACE();
Buf_AddBytes(buf, sublen, subbuf);
}
} else {
MAYBE_ADD_SPACE();
Buf_AddByte(buf, *rp);
}
}
wp += pat->matches[0].rm_eo;
if (pat->flags & VAR_SUB_GLOBAL) {
flags |= REG_NOTBOL;
if (pat->matches[0].rm_so == 0 && pat->matches[0].rm_eo == 0) {
MAYBE_ADD_SPACE();
Buf_AddByte(buf, *wp);
wp++;
}
if (*wp)
goto tryagain;
}
if (*wp) {
MAYBE_ADD_SPACE();
Buf_AddBytes(buf, strlen(wp), wp);
}
break;
default:
VarREError(xrv, &pat->re, "Unexpected regex error");
/* fall through */
case REG_NOMATCH:
if (*wp) {
MAYBE_ADD_SPACE();
Buf_AddBytes(buf, strlen(wp), wp);
}
break;
}
return addSpace || added;
}
#endif
/* Callback function for VarModify to implement the :@var@...@ modifier of
* ODE make. We set the temp variable named in pattern.lhs to word and
* expand pattern.rhs. */
static Boolean
VarLoopExpand(GNode *ctx MAKE_ATTR_UNUSED,
Var_Parse_State *vpstate MAKE_ATTR_UNUSED,
const char *word, Boolean addSpace, Buffer *buf,
void *data)
{
VarLoop *loop = data;
char *s;
int slen;
if (*word) {
Var_Set_with_flags(loop->tvar, word, loop->ctxt, VAR_NO_EXPORT);
s = Var_Subst(NULL, loop->str, loop->ctxt, loop->flags);
if (DEBUG(VAR)) {
fprintf(debug_file,
"VarLoopExpand: in \"%s\", replace \"%s\" with \"%s\" "
"to \"%s\"\n",
word, loop->tvar, loop->str, s ? s : "(null)");
}
if (s != NULL && *s != '\0') {
if (addSpace && *s != '\n')
Buf_AddByte(buf, ' ');
Buf_AddBytes(buf, (slen = strlen(s)), s);
addSpace = (slen > 0 && s[slen - 1] != '\n');
}
free(s);
}
return addSpace;
}
/*-
*-----------------------------------------------------------------------
* VarSelectWords --
* Implements the :[start..end] modifier.
* This is a special case of VarModify since we want to be able
* to scan the list backwards if start > end.
*
* Input:
* str String whose words should be trimmed
* seldata words to select
*
* Results:
* A string of all the words selected.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarSelectWords(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *str, VarSelectWords_t *seldata)
{
Buffer buf; /* Buffer for the new string */
Boolean addSpace; /* TRUE if need to add a space to the
* buffer before adding the trimmed
* word */
char **av; /* word list */
char *as; /* word list memory */
int ac, i;
int start, end, step;
Buf_Init(&buf, 0);
addSpace = FALSE;
if (vpstate->oneBigWord) {
/* fake what brk_string() would do if there were only one word */
ac = 1;
av = bmake_malloc((ac + 1) * sizeof(char *));
as = bmake_strdup(str);
av[0] = as;
av[1] = NULL;
} else {
av = brk_string(str, &ac, FALSE, &as);
}
/*
* Now sanitize seldata.
* If seldata->start or seldata->end are negative, convert them to
* the positive equivalents (-1 gets converted to argc, -2 gets
* converted to (argc-1), etc.).
*/
if (seldata->start < 0)
seldata->start = ac + seldata->start + 1;
if (seldata->end < 0)
seldata->end = ac + seldata->end + 1;
/*
* We avoid scanning more of the list than we need to.
*/
if (seldata->start > seldata->end) {
start = MIN(ac, seldata->start) - 1;
end = MAX(0, seldata->end - 1);
step = -1;
} else {
start = MAX(0, seldata->start - 1);
end = MIN(ac, seldata->end);
step = 1;
}
for (i = start;
(step < 0 && i >= end) || (step > 0 && i < end);
i += step) {
if (av[i] && *av[i]) {
if (addSpace && vpstate->varSpace) {
Buf_AddByte(&buf, vpstate->varSpace);
}
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
addSpace = TRUE;
}
}
free(as);
free(av);
return Buf_Destroy(&buf, FALSE);
}
/* Callback function for VarModify to implement the :tA modifier.
* Replace each word with the result of realpath() if successful. */
static Boolean
VarRealpath(GNode *ctx MAKE_ATTR_UNUSED, Var_Parse_State *vpstate,
const char *word, Boolean addSpace, Buffer *buf,
void *patternp MAKE_ATTR_UNUSED)
{
struct stat st;
char rbuf[MAXPATHLEN];
char *rp;
if (addSpace && vpstate->varSpace)
Buf_AddByte(buf, vpstate->varSpace);
rp = cached_realpath(word, rbuf);
if (rp && *rp == '/' && stat(rp, &st) == 0)
word = rp;
Buf_AddBytes(buf, strlen(word), word);
return TRUE;
}
/*-
*-----------------------------------------------------------------------
* Modify each of the words of the passed string using the given function.
*
* Input:
* str String whose words should be trimmed
* modProc Function to use to modify them
* data Custom data for the modProc
*
* Results:
* A string of all the words modified appropriately.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarModify(GNode *ctx, Var_Parse_State *vpstate,
const char *str, VarModifyCallback 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 */
char *as; /* word list memory */
int ac, i;
Buf_Init(&buf, 0);
addSpace = FALSE;
if (vpstate->oneBigWord) {
/* fake what brk_string() would do if there were only one word */
ac = 1;
av = bmake_malloc((ac + 1) * sizeof(char *));
as = bmake_strdup(str);
av[0] = as;
av[1] = NULL;
} else {
av = brk_string(str, &ac, FALSE, &as);
}
if (DEBUG(VAR)) {
fprintf(debug_file, "VarModify: split \"%s\" into %d words\n",
str, ac);
}
for (i = 0; i < ac; i++)
addSpace = modProc(ctx, vpstate, av[i], addSpace, &buf, datum);
free(as);
free(av);
return Buf_Destroy(&buf, FALSE);
}
static int
VarWordCompare(const void *a, const void *b)
{
int r = strcmp(*(const char * const *)a, *(const char * const *)b);
return r;
}
static int
VarWordCompareReverse(const void *a, const void *b)
{
int r = strcmp(*(const char * const *)b, *(const char * const *)a);
return r;
}
/*-
*-----------------------------------------------------------------------
* VarOrder --
* Order the words in the string.
*
* Input:
* str String whose words should be sorted.
* otype How to order: s - sort, x - random.
*
* Results:
* A string containing the words ordered.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarOrder(const char *str, const char otype)
{
Buffer buf; /* Buffer for the new string */
char **av; /* word list [first word does not count] */
char *as; /* word list memory */
int ac, i;
Buf_Init(&buf, 0);
av = brk_string(str, &ac, FALSE, &as);
if (ac > 0) {
switch (otype) {
case 'r': /* reverse sort alphabetically */
qsort(av, ac, sizeof(char *), VarWordCompareReverse);
break;
case 's': /* sort alphabetically */
qsort(av, ac, sizeof(char *), VarWordCompare);
break;
case 'x': /* randomize */
{
/*
* We will use [ac..2] range for mod factors. This will produce
* random numbers in [(ac-1)..0] interval, and minimal
* reasonable value for mod factor is 2 (the mod 1 will produce
* 0 with probability 1).
*/
for (i = ac - 1; i > 0; i--) {
int rndidx = random() % (i + 1);
char *t = av[i];
av[i] = av[rndidx];
av[rndidx] = t;
}
}
}
}
for (i = 0; i < ac; i++) {
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
if (i != ac - 1)
Buf_AddByte(&buf, ' ');
}
free(as);
free(av);
return Buf_Destroy(&buf, FALSE);
}
/*-
*-----------------------------------------------------------------------
* VarUniq --
* Remove adjacent duplicate words.
*
* Input:
* str String whose words should be sorted
*
* Results:
* A string containing the resulting words.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarUniq(const char *str)
{
Buffer buf; /* Buffer for new string */
char **av; /* List of words to affect */
char *as; /* Word list memory */
int ac, i, j;
Buf_Init(&buf, 0);
av = brk_string(str, &ac, FALSE, &as);
if (ac > 1) {
for (j = 0, i = 1; i < ac; i++)
if (strcmp(av[i], av[j]) != 0 && (++j != i))
av[j] = av[i];
ac = j + 1;
}
for (i = 0; i < ac; i++) {
Buf_AddBytes(&buf, strlen(av[i]), av[i]);
if (i != ac - 1)
Buf_AddByte(&buf, ' ');
}
free(as);
free(av);
return Buf_Destroy(&buf, FALSE);
}
/*-
*-----------------------------------------------------------------------
* VarRange --
* Return an integer sequence
*
* Input:
* str String whose words provide default range
* ac range length, if 0 use str words
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarRange(const char *str, int ac)
{
Buffer buf; /* Buffer for new string */
char tmp[32]; /* each element */
char **av; /* List of words to affect */
char *as; /* Word list memory */
int i, n;
Buf_Init(&buf, 0);
if (ac > 0) {
as = NULL;
av = NULL;
} else {
av = brk_string(str, &ac, FALSE, &as);
}
for (i = 0; i < ac; i++) {
n = snprintf(tmp, sizeof(tmp), "%d", 1 + i);
if (n >= (int)sizeof(tmp))
break;
Buf_AddBytes(&buf, n, tmp);
if (i != ac - 1)
Buf_AddByte(&buf, ' ');
}
free(as);
free(av);
return Buf_Destroy(&buf, FALSE);
}
/*-
*-----------------------------------------------------------------------
* VarGetPattern --
* During the parsing of a part of a modifier such as :S or :@,
* pass through the tstr looking for 1) escaped delimiters,
* '$'s and backslashes (place the escaped character in
* uninterpreted) and 2) unescaped $'s that aren't before
* the delimiter (expand the variable substitution unless flags
* has VAR_NOSUBST set).
* Return the expanded string or NULL if the delimiter was missing
* If pattern is specified, handle escaped ampersands, and replace
* unescaped ampersands with the lhs of the pattern.
*
* Results:
* A string of all the words modified appropriately.
* If length is specified, return the string length of the buffer
* If flags is specified and the last character of the pattern is a
* $ set the VAR_MATCH_END bit of flags.
*
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
static char *
VarGetPattern(GNode *ctxt, Var_Parse_State *vpstate MAKE_ATTR_UNUSED,
VarPattern_Flags flags, const char **tstr, int delim,
VarPattern_Flags *vflags, int *length, VarPattern *pattern)
{
const char *cp;
char *rstr;
Buffer buf;
int junk;
int errnum = flags & VARF_UNDEFERR;
Buf_Init(&buf, 0);
if (length == NULL)
length = &junk;
#define IS_A_MATCH(cp, delim) \
((cp[0] == '\\') && ((cp[1] == delim) || \
(cp[1] == '\\') || (cp[1] == '$') || (pattern && (cp[1] == '&'))))
/*
* Skim through until the matching delimiter is found;
* pick up variable substitutions on the way. Also allow
* backslashes to quote the delimiter, $, and \, but don't
* touch other backslashes.
*/
for (cp = *tstr; *cp && (*cp != delim); cp++) {
if (IS_A_MATCH(cp, delim)) {
Buf_AddByte(&buf, cp[1]);
cp++;
} else if (*cp == '$') {
if (cp[1] == delim) {
if (vflags == NULL)
Buf_AddByte(&buf, *cp);
else
/*
* Unescaped $ at end of pattern => anchor
* pattern at end.
*/
*vflags |= VAR_MATCH_END;
} else {
if (vflags == NULL || (*vflags & VAR_NOSUBST) == 0) {
char *cp2;
int len;
void *freeIt;
/*
* If unescaped dollar sign not before the
* delimiter, assume it's a variable
* substitution and recurse.
*/
cp2 = Var_Parse(cp, ctxt, errnum | (flags & VARF_WANTRES),
&len, &freeIt);
Buf_AddBytes(&buf, strlen(cp2), cp2);
free(freeIt);
cp += len - 1;
} else {
const char *cp2 = &cp[1];
if (*cp2 == PROPEN || *cp2 == BROPEN) {
/*
* Find the end of this variable reference
* and suck it in without further ado.
* It will be interpreted later.
*/
int have = *cp2;
int want = (*cp2 == PROPEN) ? PRCLOSE : BRCLOSE;
int depth = 1;
for (++cp2; *cp2 != '\0' && depth > 0; ++cp2) {
if (cp2[-1] != '\\') {
if (*cp2 == have)
++depth;
if (*cp2 == want)
--depth;
}
}
Buf_AddBytes(&buf, cp2 - cp, cp);
cp = --cp2;
} else
Buf_AddByte(&buf, *cp);
}
}
} else if (pattern && *cp == '&')
Buf_AddBytes(&buf, pattern->leftLen, pattern->lhs);
else
Buf_AddByte(&buf, *cp);
}
if (*cp != delim) {
*tstr = cp;
*length = 0;
return NULL;
}
*tstr = ++cp;
*length = Buf_Size(&buf);
rstr = Buf_Destroy(&buf, FALSE);
if (DEBUG(VAR))
fprintf(debug_file, "Modifier pattern: \"%s\"\n", rstr);
return rstr;
}
/*-
*-----------------------------------------------------------------------
* VarQuote --
* Quote shell meta-characters and space characters in the string
* if quoteDollar is set, also quote and double any '$' characters.
*
* Results:
* The quoted string
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarQuote(char *str, Boolean quoteDollar)
{
Buffer buf;
const char *newline;
size_t nlen;
if ((newline = Shell_GetNewline()) == NULL)
newline = "\\\n";
nlen = strlen(newline);
Buf_Init(&buf, 0);
for (; *str != '\0'; str++) {
if (*str == '\n') {
Buf_AddBytes(&buf, nlen, newline);
continue;
}
if (isspace((unsigned char)*str) || ismeta((unsigned char)*str))
Buf_AddByte(&buf, '\\');
Buf_AddByte(&buf, *str);
if (quoteDollar && *str == '$')
Buf_AddBytes(&buf, 2, "\\$");
}
str = Buf_Destroy(&buf, FALSE);
if (DEBUG(VAR))
fprintf(debug_file, "QuoteMeta: [%s]\n", str);
return str;
}
/*-
*-----------------------------------------------------------------------
* VarHash --
* Hash the string using the MurmurHash3 algorithm.
* Output is computed using 32bit Little Endian arithmetic.
*
* Input:
* str String to modify
*
* Results:
* Hash value of str, encoded as 8 hex digits.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
static char *
VarHash(const char *str)
{
static const char hexdigits[16] = "0123456789abcdef";
Buffer buf;
size_t len, len2;
const unsigned char *ustr = (const unsigned char *)str;
uint32_t h, k, c1, c2;
h = 0x971e137bU;
c1 = 0x95543787U;
c2 = 0x2ad7eb25U;
len2 = strlen(str);
for (len = len2; len; ) {
k = 0;
switch (len) {
default:
k = ((uint32_t)ustr[3] << 24) |
((uint32_t)ustr[2] << 16) |
((uint32_t)ustr[1] << 8) |
(uint32_t)ustr[0];
len -= 4;
ustr += 4;
break;
case 3:
k |= (uint32_t)ustr[2] << 16;
/* FALLTHROUGH */
case 2:
k |= (uint32_t)ustr[1] << 8;
/* FALLTHROUGH */
case 1:
k |= (uint32_t)ustr[0];
len = 0;
}
c1 = c1 * 5 + 0x7b7d159cU;
c2 = c2 * 5 + 0x6bce6396U;
k *= c1;
k = (k << 11) ^ (k >> 21);
k *= c2;
h = (h << 13) ^ (h >> 19);
h = h * 5 + 0x52dce729U;
h ^= k;
}
h ^= len2;
h *= 0x85ebca6b;
h ^= h >> 13;
h *= 0xc2b2ae35;
h ^= h >> 16;
Buf_Init(&buf, 0);
for (len = 0; len < 8; ++len) {
Buf_AddByte(&buf, hexdigits[h & 15]);
h >>= 4;
}
return Buf_Destroy(&buf, FALSE);
}
static char *
VarStrftime(const char *fmt, int zulu, time_t utc)
{
char buf[BUFSIZ];
if (!utc)
time(&utc);
if (!*fmt)
fmt = "%c";
strftime(buf, sizeof(buf), fmt, zulu ? gmtime(&utc) : localtime(&utc));
buf[sizeof(buf) - 1] = '\0';
return bmake_strdup(buf);
}
typedef struct {
/* const parameters */
int startc;
int endc;
Var *v;
GNode *ctxt;
int flags;
int *lengthPtr;
void **freePtr;
/* read-write */
char *nstr;
const char *tstr;
const char *start;
const char *cp; /* Secondary pointer into str (place marker
* for tstr) */
char termc; /* Character which terminated scan */
int cnt; /* Used to count brace pairs when variable in
* in parens or braces */
char delim;
int modifier; /* that we are processing */
Var_Parse_State parsestate; /* Flags passed to helper functions */
/* result */
char *newStr; /* New value to return */
} ApplyModifiersState;
/* we now have some modifiers with long names */
#define STRMOD_MATCH(s, want, n) \
(strncmp(s, want, n) == 0 && (s[n] == st->endc || s[n] == ':'))
#define STRMOD_MATCHX(s, want, n) \
(strncmp(s, want, n) == 0 && \
(s[n] == st->endc || s[n] == ':' || s[n] == '='))
#define CHARMOD_MATCH(c) (c == st->endc || c == ':')
/* :@var@...${var}...@ */
static Boolean
ApplyModifier_At(ApplyModifiersState *st) {
VarLoop loop;
VarPattern_Flags vflags = VAR_NOSUBST;
st->cp = ++(st->tstr);
st->delim = '@';
loop.tvar = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&vflags, &loop.tvarLen, NULL);
if (loop.tvar == NULL)
return FALSE;
loop.str = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&vflags, &loop.strLen, NULL);
if (loop.str == NULL)
return FALSE;
st->termc = *st->cp;
st->delim = '\0';
loop.flags = st->flags & (VARF_UNDEFERR | VARF_WANTRES);
loop.ctxt = st->ctxt;
st->newStr = VarModify(
st->ctxt, &st->parsestate, st->nstr, VarLoopExpand, &loop);
Var_Delete(loop.tvar, st->ctxt);
free(loop.tvar);
free(loop.str);
return TRUE;
}
/* :Ddefined or :Uundefined */
static void
ApplyModifier_Defined(ApplyModifiersState *st)
{
Buffer buf; /* Buffer for patterns */
int nflags;
if (st->flags & VARF_WANTRES) {
int wantres;
if (*st->tstr == 'U')
wantres = ((st->v->flags & VAR_JUNK) != 0);
else
wantres = ((st->v->flags & VAR_JUNK) == 0);
nflags = st->flags & ~VARF_WANTRES;
if (wantres)
nflags |= VARF_WANTRES;
} else
nflags = st->flags;
/*
* Pass through tstr looking for 1) escaped delimiters,
* '$'s and backslashes (place the escaped character in
* uninterpreted) and 2) unescaped $'s that aren't before
* the delimiter (expand the variable substitution).
* The result is left in the Buffer buf.
*/
Buf_Init(&buf, 0);
for (st->cp = st->tstr + 1;
*st->cp != st->endc && *st->cp != ':' && *st->cp != '\0';
st->cp++) {
if (*st->cp == '\\' &&
(st->cp[1] == ':' || st->cp[1] == '$' || st->cp[1] == st->endc ||
st->cp[1] == '\\')) {
Buf_AddByte(&buf, st->cp[1]);
st->cp++;
} else if (*st->cp == '$') {
/*
* If unescaped dollar sign, assume it's a
* variable substitution and recurse.
*/
char *cp2;
int len;
void *freeIt;
cp2 = Var_Parse(st->cp, st->ctxt, nflags, &len, &freeIt);
Buf_AddBytes(&buf, strlen(cp2), cp2);
free(freeIt);
st->cp += len - 1;
} else {
Buf_AddByte(&buf, *st->cp);
}
}
st->termc = *st->cp;
if ((st->v->flags & VAR_JUNK) != 0)
st->v->flags |= VAR_KEEP;
if (nflags & VARF_WANTRES) {
st->newStr = Buf_Destroy(&buf, FALSE);
} else {
st->newStr = st->nstr;
Buf_Destroy(&buf, TRUE);
}
}
/* :gmtime */
static Boolean
ApplyModifier_Gmtime(ApplyModifiersState *st)
{
time_t utc;
char *ep;
st->cp = st->tstr + 1; /* make sure it is set */
if (!STRMOD_MATCHX(st->tstr, "gmtime", 6))
return FALSE;
if (st->tstr[6] == '=') {
utc = strtoul(&st->tstr[7], &ep, 10);
st->cp = ep;
} else {
utc = 0;
st->cp = st->tstr + 6;
}
st->newStr = VarStrftime(st->nstr, 1, utc);
st->termc = *st->cp;
return TRUE;
}
/* :localtime */
static Boolean
ApplyModifier_Localtime(ApplyModifiersState *st)
{
time_t utc;
char *ep;
st->cp = st->tstr + 1; /* make sure it is set */
if (!STRMOD_MATCHX(st->tstr, "localtime", 9))
return FALSE;
if (st->tstr[9] == '=') {
utc = strtoul(&st->tstr[10], &ep, 10);
st->cp = ep;
} else {
utc = 0;
st->cp = st->tstr + 9;
}
st->newStr = VarStrftime(st->nstr, 0, utc);
st->termc = *st->cp;
return TRUE;
}
/* :hash */
static Boolean
ApplyModifier_Hash(ApplyModifiersState *st)
{
st->cp = st->tstr + 1; /* make sure it is set */
if (!STRMOD_MATCH(st->tstr, "hash", 4))
return FALSE;
st->newStr = VarHash(st->nstr);
st->cp = st->tstr + 4;
st->termc = *st->cp;
return TRUE;
}
/* :P */
static void
ApplyModifier_Path(ApplyModifiersState *st)
{
GNode *gn;
if ((st->v->flags & VAR_JUNK) != 0)
st->v->flags |= VAR_KEEP;
gn = Targ_FindNode(st->v->name, TARG_NOCREATE);
if (gn == NULL || gn->type & OP_NOPATH) {
st->newStr = NULL;
} else if (gn->path) {
st->newStr = bmake_strdup(gn->path);
} else {
st->newStr = Dir_FindFile(st->v->name, Suff_FindPath(gn));
}
if (!st->newStr)
st->newStr = bmake_strdup(st->v->name);
st->cp = ++st->tstr;
st->termc = *st->tstr;
}
/* :!cmd! */
static Boolean
ApplyModifier_Exclam(ApplyModifiersState *st)
{
const char *emsg;
VarPattern pattern;
pattern.flags = 0;
st->delim = '!';
emsg = NULL;
st->cp = ++st->tstr;
pattern.rhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, &pattern.rightLen, NULL);
if (pattern.rhs == NULL)
return FALSE;
if (st->flags & VARF_WANTRES)
st->newStr = Cmd_Exec(pattern.rhs, &emsg);
else
st->newStr = varNoError;
free(UNCONST(pattern.rhs));
if (emsg)
Error(emsg, st->nstr);
st->termc = *st->cp;
st->delim = '\0';
if (st->v->flags & VAR_JUNK)
st->v->flags |= VAR_KEEP;
return TRUE;
}
/* :range */
static Boolean
ApplyModifier_Range(ApplyModifiersState *st)
{
int n;
char *ep;
st->cp = st->tstr + 1; /* make sure it is set */
if (!STRMOD_MATCHX(st->tstr, "range", 5))
return FALSE;
if (st->tstr[5] == '=') {
n = strtoul(&st->tstr[6], &ep, 10);
st->cp = ep;
} else {
n = 0;
st->cp = st->tstr + 5;
}
st->newStr = VarRange(st->nstr, n);
st->termc = *st->cp;
return TRUE;
}
/* :Mpattern or :Npattern */
static void
ApplyModifier_Match(ApplyModifiersState *st)
{
char *pattern;
const char *endpat; /* points just after end of pattern */
char *cp2;
Boolean copy; /* pattern should be, or has been, copied */
Boolean needSubst;
int nest;
copy = FALSE;
needSubst = FALSE;
nest = 1;
/*
* In the loop below, ignore ':' unless we are at
* (or back to) the original brace level.
* XXX This will likely not work right if $() and ${}
* are intermixed.
*/
for (st->cp = st->tstr + 1;
*st->cp != '\0' && !(*st->cp == ':' && nest == 1);
st->cp++) {
if (*st->cp == '\\' &&
(st->cp[1] == ':' || st->cp[1] == st->endc ||
st->cp[1] == st->startc)) {
if (!needSubst)
copy = TRUE;
st->cp++;
continue;
}
if (*st->cp == '$')
needSubst = TRUE;
if (*st->cp == '(' || *st->cp == '{')
++nest;
if (*st->cp == ')' || *st->cp == '}') {
--nest;
if (nest == 0)
break;
}
}
st->termc = *st->cp;
endpat = st->cp;
if (copy) {
/*
* Need to compress the \:'s out of the pattern, so
* allocate enough room to hold the uncompressed
* pattern (note that st->cp started at st->tstr+1, so
* st->cp - st->tstr takes the null byte into account) and
* compress the pattern into the space.
*/
pattern = bmake_malloc(st->cp - st->tstr);
for (cp2 = pattern, st->cp = st->tstr + 1;
st->cp < endpat;
st->cp++, cp2++) {
if ((*st->cp == '\\') && (st->cp+1 < endpat) &&
(st->cp[1] == ':' || st->cp[1] == st->endc))
st->cp++;
*cp2 = *st->cp;
}
*cp2 = '\0';
endpat = cp2;
} else {
/*
* Either Var_Subst or VarModify will need a
* nul-terminated string soon, so construct one now.
*/
pattern = bmake_strndup(st->tstr+1, endpat - (st->tstr + 1));
}
if (needSubst) {
/* pattern contains embedded '$', so use Var_Subst to expand it. */
cp2 = pattern;
pattern = Var_Subst(NULL, cp2, st->ctxt, st->flags);
free(cp2);
}
if (DEBUG(VAR))
fprintf(debug_file, "Pattern[%s] for [%s] is [%s]\n",
st->v->name, st->nstr, pattern);
if (*st->tstr == 'M') {
st->newStr = VarModify(st->ctxt, &st->parsestate, st->nstr, VarMatch,
pattern);
} else {
st->newStr = VarModify(st->ctxt, &st->parsestate, st->nstr, VarNoMatch,
pattern);
}
free(pattern);
}
/* :S,from,to, */
static Boolean
ApplyModifier_Subst(ApplyModifiersState *st)
{
VarPattern pattern;
Var_Parse_State tmpparsestate;
pattern.flags = 0;
tmpparsestate = st->parsestate;
st->delim = st->tstr[1];
st->tstr += 2;
/*
* If pattern begins with '^', it is anchored to the
* start of the word -- skip over it and flag pattern.
*/
if (*st->tstr == '^') {
pattern.flags |= VAR_MATCH_START;
st->tstr += 1;
}
st->cp = st->tstr;
pattern.lhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&pattern.flags, &pattern.leftLen, NULL);
if (pattern.lhs == NULL)
return FALSE;
pattern.rhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, &pattern.rightLen, &pattern);
if (pattern.rhs == NULL)
return FALSE;
/*
* Check for global substitution. If 'g' after the final
* delimiter, substitution is global and is marked that
* way.
*/
for (;; st->cp++) {
switch (*st->cp) {
case 'g':
pattern.flags |= VAR_SUB_GLOBAL;
continue;
case '1':
pattern.flags |= VAR_SUB_ONE;
continue;
case 'W':
tmpparsestate.oneBigWord = TRUE;
continue;
}
break;
}
st->termc = *st->cp;
st->newStr = VarModify(
st->ctxt, &tmpparsestate, st->nstr, VarSubstitute, &pattern);
/* Free the two strings. */
free(UNCONST(pattern.lhs));
free(UNCONST(pattern.rhs));
st->delim = '\0';
return TRUE;
}
#ifndef NO_REGEX
/* :C,from,to, */
static Boolean
ApplyModifier_Regex(ApplyModifiersState *st)
{
VarREPattern pattern;
char *re;
int error;
Var_Parse_State tmpparsestate;
pattern.flags = 0;
tmpparsestate = st->parsestate;
st->delim = st->tstr[1];
st->tstr += 2;
st->cp = st->tstr;
re = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, NULL, NULL);
if (re == NULL)
return FALSE;
pattern.replace = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, NULL, NULL);
if (pattern.replace == NULL) {
free(re);
return FALSE;
}
for (;; st->cp++) {
switch (*st->cp) {
case 'g':
pattern.flags |= VAR_SUB_GLOBAL;
continue;
case '1':
pattern.flags |= VAR_SUB_ONE;
continue;
case 'W':
tmpparsestate.oneBigWord = TRUE;
continue;
}
break;
}
st->termc = *st->cp;
error = regcomp(&pattern.re, re, REG_EXTENDED);
free(re);
if (error) {
*st->lengthPtr = st->cp - st->start + 1;
VarREError(error, &pattern.re, "RE substitution error");
free(pattern.replace);
return FALSE;
}
pattern.nsub = pattern.re.re_nsub + 1;
if (pattern.nsub < 1)
pattern.nsub = 1;
if (pattern.nsub > 10)
pattern.nsub = 10;
pattern.matches = bmake_malloc(pattern.nsub * sizeof(regmatch_t));
st->newStr = VarModify(
st->ctxt, &tmpparsestate, st->nstr, VarRESubstitute, &pattern);
regfree(&pattern.re);
free(pattern.replace);
free(pattern.matches);
st->delim = '\0';
return TRUE;
}
#endif
/* :tA, :tu, :tl, etc. */
static Boolean
ApplyModifier_To(ApplyModifiersState *st)
{
st->cp = st->tstr + 1; /* make sure it is set */
if (st->tstr[1] != st->endc && st->tstr[1] != ':') {
if (st->tstr[1] == 's') {
/* Use the char (if any) at st->tstr[2] as the word separator. */
VarPattern pattern;
if (st->tstr[2] != st->endc &&
(st->tstr[3] == st->endc || st->tstr[3] == ':')) {
/* ":ts<unrecognised><endc>" or
* ":ts<unrecognised>:" */
st->parsestate.varSpace = st->tstr[2];
st->cp = st->tstr + 3;
} else if (st->tstr[2] == st->endc || st->tstr[2] == ':') {
/* ":ts<endc>" or ":ts:" */
st->parsestate.varSpace = 0; /* no separator */
st->cp = st->tstr + 2;
} else if (st->tstr[2] == '\\') {
const char *xp = &st->tstr[3];
int base = 8; /* assume octal */
switch (st->tstr[3]) {
case 'n':
st->parsestate.varSpace = '\n';
st->cp = st->tstr + 4;
break;
case 't':
st->parsestate.varSpace = '\t';
st->cp = st->tstr + 4;
break;
case 'x':
base = 16;
xp++;
goto get_numeric;
case '0':
base = 0;
goto get_numeric;
default:
if (isdigit((unsigned char)st->tstr[3])) {
char *ep;
get_numeric:
st->parsestate.varSpace = strtoul(xp, &ep, base);
if (*ep != ':' && *ep != st->endc)
return FALSE;
st->cp = ep;
} else {
/* ":ts<backslash><unrecognised>". */
return FALSE;
}
break;
}
} else {
/* Found ":ts<unrecognised><unrecognised>". */
return FALSE;
}
st->termc = *st->cp;
/*
* We cannot be certain that VarModify will be used - even if there
* is a subsequent modifier, so do a no-op VarSubstitute now to for
* str to be re-expanded without the spaces.
*/
pattern.flags = VAR_SUB_ONE;
pattern.lhs = pattern.rhs = "\032";
pattern.leftLen = pattern.rightLen = 1;
st->newStr = VarModify(
st->ctxt, &st->parsestate, st->nstr, VarSubstitute, &pattern);
} else if (st->tstr[2] == st->endc || st->tstr[2] == ':') {
/* Check for two-character options: ":tu", ":tl" */
if (st->tstr[1] == 'A') { /* absolute path */
st->newStr = VarModify(
st->ctxt, &st->parsestate, st->nstr, VarRealpath, NULL);
st->cp = st->tstr + 2;
st->termc = *st->cp;
} else if (st->tstr[1] == 'u') {
char *dp = bmake_strdup(st->nstr);
for (st->newStr = dp; *dp; dp++)
*dp = toupper((unsigned char)*dp);
st->cp = st->tstr + 2;
st->termc = *st->cp;
} else if (st->tstr[1] == 'l') {
char *dp = bmake_strdup(st->nstr);
for (st->newStr = dp; *dp; dp++)
*dp = tolower((unsigned char)*dp);
st->cp = st->tstr + 2;
st->termc = *st->cp;
} else if (st->tstr[1] == 'W' || st->tstr[1] == 'w') {
st->parsestate.oneBigWord = (st->tstr[1] == 'W');
st->newStr = st->nstr;
st->cp = st->tstr + 2;
st->termc = *st->cp;
} else {
/* Found ":t<unrecognised>:" or ":t<unrecognised><endc>". */
return FALSE;
}
} else {
/* Found ":t<unrecognised><unrecognised>". */
return FALSE;
}
} else {
/* Found ":t<endc>" or ":t:". */
return FALSE;
}
return TRUE;
}
/* :[#], :[1], etc. */
static int
ApplyModifier_Words(ApplyModifiersState *st)
{
/*
* Look for the closing ']', recursively
* expanding any embedded variables.
*
* estr is a pointer to the expanded result,
* which we must free().
*/
char *estr;
st->cp = st->tstr + 1; /* point to char after '[' */
st->delim = ']'; /* look for closing ']' */
estr = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, NULL, NULL);
if (estr == NULL)
return 'c'; /* report missing ']' */
/* now st->cp points just after the closing ']' */
st->delim = '\0';
if (st->cp[0] != ':' && st->cp[0] != st->endc) {
/* Found junk after ']' */
free(estr);
return 'b';
}
if (estr[0] == '\0') {
/* Found empty square brackets in ":[]". */
free(estr);
return 'b';
} else if (estr[0] == '#' && estr[1] == '\0') {
/* Found ":[#]" */
/*
* We will need enough space for the decimal
* representation of an int. We calculate the
* space needed for the octal representation,
* and add enough slop to cope with a '-' sign
* (which should never be needed) and a '\0'
* string terminator.
*/
int newStrSize = (sizeof(int) * CHAR_BIT + 2) / 3 + 2;
st->newStr = bmake_malloc(newStrSize);
if (st->parsestate.oneBigWord) {
strncpy(st->newStr, "1", newStrSize);
} else {
/* XXX: brk_string() is a rather expensive
* way of counting words. */
char **av;
char *as;
int ac;
av = brk_string(st->nstr, &ac, FALSE, &as);
snprintf(st->newStr, newStrSize, "%d", ac);
free(as);
free(av);
}
st->termc = *st->cp;
free(estr);
return 0;
} else if (estr[0] == '*' && estr[1] == '\0') {
/* Found ":[*]" */
st->parsestate.oneBigWord = TRUE;
st->newStr = st->nstr;
st->termc = *st->cp;
free(estr);
return 0;
} else if (estr[0] == '@' && estr[1] == '\0') {
/* Found ":[@]" */
st->parsestate.oneBigWord = FALSE;
st->newStr = st->nstr;
st->termc = *st->cp;
free(estr);
return 0;
} else {
char *ep;
/*
* We expect estr to contain a single
* integer for :[N], or two integers
* separated by ".." for :[start..end].
*/
VarSelectWords_t seldata = { 0, 0 };
seldata.start = strtol(estr, &ep, 0);
if (ep == estr) {
/* Found junk instead of a number */
free(estr);
return 'b';
} else if (ep[0] == '\0') {
/* Found only one integer in :[N] */
seldata.end = seldata.start;
} else if (ep[0] == '.' && ep[1] == '.' && ep[2] != '\0') {
/* Expecting another integer after ".." */
ep += 2;
seldata.end = strtol(ep, &ep, 0);
if (ep[0] != '\0') {
/* Found junk after ".." */
free(estr);
return 'b';
}
} else {
/* Found junk instead of ".." */
free(estr);
return 'b';
}
/*
* Now seldata is properly filled in,
* but we still have to check for 0 as
* a special case.
*/
if (seldata.start == 0 && seldata.end == 0) {
/* ":[0]" or perhaps ":[0..0]" */
st->parsestate.oneBigWord = TRUE;
st->newStr = st->nstr;
st->termc = *st->cp;
free(estr);
return 0;
} else if (seldata.start == 0 || seldata.end == 0) {
/* ":[0..N]" or ":[N..0]" */
free(estr);
return 'b';
}
/* Normal case: select the words described by seldata. */
st->newStr = VarSelectWords(
st->ctxt, &st->parsestate, st->nstr, &seldata);
st->termc = *st->cp;
free(estr);
return 0;
}
}
/* :O or :Ox */
static Boolean
ApplyModifier_Order(ApplyModifiersState *st)
{
char otype;
st->cp = st->tstr + 1; /* skip to the rest in any case */
if (st->tstr[1] == st->endc || st->tstr[1] == ':') {
otype = 's';
st->termc = *st->cp;
} else if ((st->tstr[1] == 'r' || st->tstr[1] == 'x') &&
(st->tstr[2] == st->endc || st->tstr[2] == ':')) {
otype = st->tstr[1];
st->cp = st->tstr + 2;
st->termc = *st->cp;
} else {
return FALSE;
}
st->newStr = VarOrder(st->nstr, otype);
return TRUE;
}
/* :? then : else */
static Boolean
ApplyModifier_IfElse(ApplyModifiersState *st)
{
VarPattern pattern;
Boolean value;
int cond_rc;
VarPattern_Flags lhs_flags, rhs_flags;
/* find ':', and then substitute accordingly */
if (st->flags & VARF_WANTRES) {
cond_rc = Cond_EvalExpression(NULL, st->v->name, &value, 0, FALSE);
if (cond_rc == COND_INVALID) {
lhs_flags = rhs_flags = VAR_NOSUBST;
} else if (value) {
lhs_flags = 0;
rhs_flags = VAR_NOSUBST;
} else {
lhs_flags = VAR_NOSUBST;
rhs_flags = 0;
}
} else {
/* we are just consuming and discarding */
cond_rc = value = 0;
lhs_flags = rhs_flags = VAR_NOSUBST;
}
pattern.flags = 0;
st->cp = ++st->tstr;
st->delim = ':';
pattern.lhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&lhs_flags, &pattern.leftLen, NULL);
if (pattern.lhs == NULL)
return FALSE;
/* BROPEN or PROPEN */
st->delim = st->endc;
pattern.rhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&rhs_flags, &pattern.rightLen, NULL);
if (pattern.rhs == NULL)
return FALSE;
st->termc = *--st->cp;
st->delim = '\0';
if (cond_rc == COND_INVALID) {
Error("Bad conditional expression `%s' in %s?%s:%s",
st->v->name, st->v->name, pattern.lhs, pattern.rhs);
return FALSE;
}
if (value) {
st->newStr = UNCONST(pattern.lhs);
free(UNCONST(pattern.rhs));
} else {
st->newStr = UNCONST(pattern.rhs);
free(UNCONST(pattern.lhs));
}
if (st->v->flags & VAR_JUNK)
st->v->flags |= VAR_KEEP;
return TRUE;
}
/* "::=", "::!=", "::+=", or "::?=" */
static int
ApplyModifier_Assign(ApplyModifiersState *st)
{
if (st->tstr[1] == '=' ||
(st->tstr[2] == '=' &&
(st->tstr[1] == '!' || st->tstr[1] == '+' || st->tstr[1] == '?'))) {
GNode *v_ctxt; /* context where v belongs */
const char *emsg;
char *sv_name;
VarPattern pattern;
int how;
VarPattern_Flags vflags;
if (st->v->name[0] == 0)
return 'b';
v_ctxt = st->ctxt;
sv_name = NULL;
++st->tstr;
if (st->v->flags & VAR_JUNK) {
/*
* We need to bmake_strdup() it incase
* VarGetPattern() recurses.
*/
sv_name = st->v->name;
st->v->name = bmake_strdup(st->v->name);
} else if (st->ctxt != VAR_GLOBAL) {
Var *gv = VarFind(st->v->name, st->ctxt, 0);
if (gv == NULL)
v_ctxt = VAR_GLOBAL;
else
VarFreeEnv(gv, TRUE);
}
switch ((how = *st->tstr)) {
case '+':
case '?':
case '!':
st->cp = &st->tstr[2];
break;
default:
st->cp = ++st->tstr;
break;
}
st->delim = st->startc == PROPEN ? PRCLOSE : BRCLOSE;
pattern.flags = 0;
vflags = (st->flags & VARF_WANTRES) ? 0 : VAR_NOSUBST;
pattern.rhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&vflags, &pattern.rightLen, NULL);
if (st->v->flags & VAR_JUNK) {
/* restore original name */
free(st->v->name);
st->v->name = sv_name;
}
if (pattern.rhs == NULL)
return 'c';
st->termc = *--st->cp;
st->delim = '\0';
if (st->flags & VARF_WANTRES) {
switch (how) {
case '+':
Var_Append(st->v->name, pattern.rhs, v_ctxt);
break;
case '!':
st->newStr = Cmd_Exec(pattern.rhs, &emsg);
if (emsg)
Error(emsg, st->nstr);
else
Var_Set(st->v->name, st->newStr, v_ctxt);
free(st->newStr);
break;
case '?':
if ((st->v->flags & VAR_JUNK) == 0)
break;
/* FALLTHROUGH */
default:
Var_Set(st->v->name, pattern.rhs, v_ctxt);
break;
}
}
free(UNCONST(pattern.rhs));
st->newStr = varNoError;
return 0;
}
return 'd'; /* "::<unrecognised>" */
}
/* remember current value */
static Boolean
ApplyModifier_Remember(ApplyModifiersState *st)
{
st->cp = st->tstr + 1; /* make sure it is set */
if (!STRMOD_MATCHX(st->tstr, "_", 1))
return FALSE;
if (st->tstr[1] == '=') {
char *np;
int n;
st->cp++;
n = strcspn(st->cp, ":)}");
np = bmake_strndup(st->cp, n + 1);
np[n] = '\0';
st->cp = st->tstr + 2 + n;
Var_Set(np, st->nstr, st->ctxt);
free(np);
} else {
Var_Set("_", st->nstr, st->ctxt);
}
st->newStr = st->nstr;
st->termc = *st->cp;
return TRUE;
}
#ifdef SYSVVARSUB
/* :from=to */
static int
ApplyModifier_SysV(ApplyModifiersState *st)
{
/*
* This can either be a bogus modifier or a System-V
* substitution command.
*/
VarPattern pattern;
Boolean eqFound = FALSE;
pattern.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>)
*/
st->cp = st->tstr;
st->cnt = 1;
while (*st->cp != '\0' && st->cnt) {
if (*st->cp == '=') {
eqFound = TRUE;
/* continue looking for st->endc */
} else if (*st->cp == st->endc)
st->cnt--;
else if (*st->cp == st->startc)
st->cnt++;
if (st->cnt)
st->cp++;
}
if (*st->cp != st->endc || !eqFound)
return 0;
st->delim = '=';
st->cp = st->tstr;
pattern.lhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
&pattern.flags, &pattern.leftLen, NULL);
if (pattern.lhs == NULL)
return 'c';
st->delim = st->endc;
pattern.rhs = VarGetPattern(
st->ctxt, &st->parsestate, st->flags, &st->cp, st->delim,
NULL, &pattern.rightLen, &pattern);
if (pattern.rhs == NULL)
return 'c';
/*
* SYSV modifications happen through the whole
* string. Note the pattern is anchored at the end.
*/
st->termc = *--st->cp;
st->delim = '\0';
if (pattern.leftLen == 0 && *st->nstr == '\0') {
st->newStr = st->nstr; /* special case */
} else {
st->newStr = VarModify(
st->ctxt, &st->parsestate, st->nstr, VarSYSVMatch, &pattern);
}
free(UNCONST(pattern.lhs));
free(UNCONST(pattern.rhs));
return '=';
}
#endif
/*
* Now we need to apply any modifiers the user wants applied.
* These are:
* :M<pattern> words which match the given <pattern>.
* <pattern> is of the standard file
* wildcarding form.
* :N<pattern> words which do not match the given <pattern>.
* :S<d><pat1><d><pat2><d>[1gW]
* Substitute <pat2> for <pat1> in the value
* :C<d><pat1><d><pat2><d>[1gW]
* Substitute <pat2> for regex <pat1> in the value
* :H Substitute the head of each word
* :T Substitute the tail of each word
* :E Substitute the extension (minus '.') of
* each word
* :R Substitute the root of each word
* (pathname minus the suffix).
* :O ("Order") Alphabeticaly sort words in variable.
* :Ox ("intermiX") Randomize words in variable.
* :u ("uniq") Remove adjacent duplicate words.
* :tu Converts the variable contents to uppercase.
* :tl Converts the variable contents to lowercase.
* :ts[c] Sets varSpace - the char used to
* separate words to 'c'. If 'c' is
* omitted then no separation is used.
* :tW Treat the variable contents as a single
* word, even if it contains spaces.
* (Mnemonic: one big 'W'ord.)
* :tw Treat the variable contents as multiple
* space-separated words.
* (Mnemonic: many small 'w'ords.)
* :[index] Select a single word from the value.
* :[start..end] Select multiple words from the value.
* :[*] or :[0] Select the entire value, as a single
* word. Equivalent to :tW.
* :[@] Select the entire value, as multiple
* words. Undoes the effect of :[*].
* Equivalent to :tw.
* :[#] Returns the number of words in the value.
*
* :?<true-value>:<false-value>
* If the variable evaluates to true, return
* true value, else return the second value.
* :lhs=rhs Like :S, but the rhs goes to the end of
* the invocation.
* :sh Treat the current value as a command
* to be run, new value is its output.
* The following added so we can handle ODE makefiles.
* :@<tmpvar>@<newval>@
* Assign a temporary local variable <tmpvar>
* to the current value of each word in turn
* and replace each word with the result of
* evaluating <newval>
* :D<newval> Use <newval> as value if variable defined
* :U<newval> Use <newval> as value if variable undefined
* :L Use the name of the variable as the value.
* :P Use the path of the node that has the same
* name as the variable as the value. This
* basically includes an implied :L so that
* the common method of refering to the path
* of your dependent 'x' in a rule is to use
* the form '${x:P}'.
* :!<cmd>! Run cmd much the same as :sh run's the
* current value of the variable.
* The ::= modifiers, actually assign a value to the variable.
* Their main purpose is in supporting modifiers of .for loop
* iterators and other obscure uses. They always expand to
* nothing. In a target rule that would otherwise expand to an
* empty line they can be preceded with @: to keep make happy.
* Eg.
*
* foo: .USE
* .for i in ${.TARGET} ${.TARGET:R}.gz
* @: ${t::=$i}
* @echo blah ${t:T}
* .endfor
*
* ::=<str> Assigns <str> as the new value of variable.
* ::?=<str> Assigns <str> as value of variable if
* it was not already set.
* ::+=<str> Appends <str> to variable.
* ::!=<cmd> Assigns output of <cmd> as the new value of
* variable.
*/
static char *
ApplyModifiers(char *nstr, const char *tstr,
int const startc, int const endc,
Var * const v, GNode * const ctxt, int const flags,
int * const lengthPtr, void ** const freePtr)
{
ApplyModifiersState st = {
startc, endc, v, ctxt, flags, lengthPtr, freePtr,
nstr, tstr, tstr, tstr,
'\0', 0, '\0', 0, {' ', FALSE}, NULL
};
while (*st.tstr && *st.tstr != st.endc) {
if (*st.tstr == '$') {
/*
* We may have some complex modifiers in a variable.
*/
void *freeIt;
char *rval;
int rlen;
int c;
rval = Var_Parse(st.tstr, st.ctxt, st.flags, &rlen, &freeIt);
/*
* If we have not parsed up to st.endc or ':',
* we are not interested.
*/
if (rval != NULL && *rval &&
(c = st.tstr[rlen]) != '\0' &&
c != ':' &&
c != st.endc) {
free(freeIt);
goto apply_mods;
}
if (DEBUG(VAR)) {
fprintf(debug_file, "Got '%s' from '%.*s'%.*s\n",
rval, rlen, st.tstr, rlen, st.tstr + rlen);
}
st.tstr += rlen;
if (rval != NULL && *rval) {
int used;
st.nstr = ApplyModifiers(st.nstr, rval, 0, 0, st.v,
st.ctxt, st.flags, &used, st.freePtr);
if (st.nstr == var_Error
|| (st.nstr == varNoError && (st.flags & VARF_UNDEFERR) == 0)
|| strlen(rval) != (size_t) used) {
free(freeIt);
goto out; /* error already reported */
}
}
free(freeIt);
if (*st.tstr == ':')
st.tstr++;
else if (!*st.tstr && st.endc) {
Error("Unclosed variable specification after complex "
"modifier (expecting '%c') for %s", st.endc, st.v->name);
goto out;
}
continue;
}
apply_mods:
if (DEBUG(VAR)) {
fprintf(debug_file, "Applying[%s] :%c to \"%s\"\n", st.v->name,
*st.tstr, st.nstr);
}
st.newStr = var_Error;
switch ((st.modifier = *st.tstr)) {
case ':':
{
int res = ApplyModifier_Assign(&st);
if (res == 'b')
goto bad_modifier;
if (res == 'c')
goto cleanup;
if (res == 'd')
goto default_case;
break;
}
case '@':
ApplyModifier_At(&st);
break;
case '_':
if (!ApplyModifier_Remember(&st))
goto default_case;
break;
case 'D':
case 'U':
ApplyModifier_Defined(&st);
break;
case 'L':
{
if ((st.v->flags & VAR_JUNK) != 0)
st.v->flags |= VAR_KEEP;
st.newStr = bmake_strdup(st.v->name);
st.cp = ++st.tstr;
st.termc = *st.tstr;
break;
}
case 'P':
ApplyModifier_Path(&st);
break;
case '!':
if (!ApplyModifier_Exclam(&st))
goto cleanup;
break;
case '[':
{
int res = ApplyModifier_Words(&st);
if (res == 'b')
goto bad_modifier;
if (res == 'c')
goto cleanup;
break;
}
case 'g':
if (!ApplyModifier_Gmtime(&st))
goto default_case;
break;
case 'h':
if (!ApplyModifier_Hash(&st))
goto default_case;
break;
case 'l':
if (!ApplyModifier_Localtime(&st))
goto default_case;
break;
case 't':
if (!ApplyModifier_To(&st))
goto bad_modifier;
break;
case 'N':
case 'M':
ApplyModifier_Match(&st);
break;
case 'S':
if (!ApplyModifier_Subst(&st))
goto cleanup;
break;
case '?':
if (!ApplyModifier_IfElse(&st))
goto cleanup;
break;
#ifndef NO_REGEX
case 'C':
if (!ApplyModifier_Regex(&st))
goto cleanup;
break;
#endif
case 'q':
case 'Q':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarQuote(st.nstr, st.modifier == 'q');
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
case 'T':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarModify(st.ctxt, &st.parsestate, st.nstr, VarTail,
NULL);
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
case 'H':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarModify(st.ctxt, &st.parsestate, st.nstr, VarHead,
NULL);
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
case 'E':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarModify(st.ctxt, &st.parsestate, st.nstr, VarSuffix,
NULL);
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
case 'R':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarModify(st.ctxt, &st.parsestate, st.nstr, VarRoot,
NULL);
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
case 'r':
if (!ApplyModifier_Range(&st))
goto default_case;
break;
case 'O':
if (!ApplyModifier_Order(&st))
goto bad_modifier;
break;
case 'u':
if (st.tstr[1] == st.endc || st.tstr[1] == ':') {
st.newStr = VarUniq(st.nstr);
st.cp = st.tstr + 1;
st.termc = *st.cp;
break;
}
goto default_case;
#ifdef SUNSHCMD
case 's':
if (st.tstr[1] == 'h' && (st.tstr[2] == st.endc || st.tstr[2] == ':')) {
const char *emsg;
if (st.flags & VARF_WANTRES) {
st.newStr = Cmd_Exec(st.nstr, &emsg);
if (emsg)
Error(emsg, st.nstr);
} else
st.newStr = varNoError;
st.cp = st.tstr + 2;
st.termc = *st.cp;
break;
}
goto default_case;
#endif
default:
default_case:
{
#ifdef SYSVVARSUB
int res = ApplyModifier_SysV(&st);
if (res == 'c')
goto cleanup;
if (res != '=')
#endif
{
Error("Unknown modifier '%c'", *st.tstr);
for (st.cp = st.tstr+1;
*st.cp != ':' && *st.cp != st.endc && *st.cp != '\0';
st.cp++)
continue;
st.termc = *st.cp;
st.newStr = var_Error;
}
}
}
if (DEBUG(VAR)) {
fprintf(debug_file, "Result[%s] of :%c is \"%s\"\n",
st.v->name, st.modifier, st.newStr);
}
if (st.newStr != st.nstr) {
if (*st.freePtr) {
free(st.nstr);
*st.freePtr = NULL;
}
st.nstr = st.newStr;
if (st.nstr != var_Error && st.nstr != varNoError) {
*st.freePtr = st.nstr;
}
}
if (st.termc == '\0' && st.endc != '\0') {
Error("Unclosed variable specification (expecting '%c') "
"for \"%s\" (value \"%s\") modifier %c",
st.endc, st.v->name, st.nstr, st.modifier);
} else if (st.termc == ':') {
st.cp++;
}
st.tstr = st.cp;
}
out:
*st.lengthPtr = st.tstr - st.start;
return st.nstr;
bad_modifier:
/* "{(" */
Error("Bad modifier `:%.*s' for %s", (int)strcspn(st.tstr, ":)}"), st.tstr,
st.v->name);
cleanup:
*st.lengthPtr = st.cp - st.start;
if (st.delim != '\0')
Error("Unclosed substitution for %s (%c missing)",
st.v->name, st.delim);
free(*st.freePtr);
*st.freePtr = NULL;
return var_Error;
}
/*-
*-----------------------------------------------------------------------
* Var_Parse --
* Given the start of a variable invocation, extract the variable
* name and find its value, then modify it according to the
* specification.
*
* Input:
* str The string to parse
* ctxt The context for the variable
* flags VARF_UNDEFERR if undefineds are an error
* VARF_WANTRES if we actually want the result
* VARF_ASSIGN if we are in a := assignment
* lengthPtr OUT: The length of the specification
* freePtr OUT: Non-NULL if caller should free *freePtr
*
* Results:
* The (possibly-modified) value of the variable or var_Error if the
* specification is invalid. The length of the specification is
* placed in *lengthPtr (for invalid specifications, this is just
* 2...?).
* If *freePtr is non-NULL then it's a pointer that the caller
* should pass to free() to free memory used by the result.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
/* coverity[+alloc : arg-*4] */
char *
Var_Parse(const char *str, GNode *ctxt, Varf_Flags flags,
int *lengthPtr, void **freePtr)
{
const char *tstr; /* Pointer into str */
Var *v; /* Variable in invocation */
Boolean haveModifier; /* TRUE if have modifiers for the variable */
char endc; /* Ending character when variable in parens
* or braces */
char startc; /* Starting character when variable in parens
* or braces */
int vlen; /* Length of variable name */
const char *start; /* Points to original start of str */
char *nstr; /* New string, used during expansion */
Boolean dynamic; /* TRUE if the variable is local and we're
* expanding it in a non-local context. This
* is done to support dynamic sources. The
* result is just the invocation, unaltered */
const char *extramodifiers; /* extra modifiers to apply first */
char name[2];
*freePtr = NULL;
extramodifiers = NULL;
dynamic = FALSE;
start = str;
startc = str[1];
if (startc != PROPEN && startc != BROPEN) {
/*
* If it's not bounded by braces of some sort, life is much simpler.
* We just need to check for the first character and return the
* value if it exists.
*/
/* Error out some really stupid names */
if (startc == '\0' || strchr(")}:$", startc)) {
*lengthPtr = 1;
return var_Error;
}
name[0] = startc;
name[1] = '\0';
v = VarFind(name, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
if (v == NULL) {
*lengthPtr = 2;
if ((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)) {
/*
* If substituting a local variable in a non-local context,
* assume it's for dynamic source stuff. We have to handle
* this specially and return the longhand for the variable
* with the dollar sign escaped so it makes it back to the
* caller. Only four of the local variables are treated
* specially as they are the only four that will be set
* when dynamic sources are expanded.
*/
switch (str[1]) {
case '@':
return UNCONST("$(.TARGET)");
case '%':
return UNCONST("$(.MEMBER)");
case '*':
return UNCONST("$(.PREFIX)");
case '!':
return UNCONST("$(.ARCHIVE)");
}
}
return (flags & VARF_UNDEFERR) ? var_Error : varNoError;
} else {
haveModifier = FALSE;
tstr = &str[1];
endc = str[1];
}
} else {
Buffer buf; /* Holds the variable name */
int depth = 1;
endc = startc == PROPEN ? PRCLOSE : BRCLOSE;
Buf_Init(&buf, 0);
/*
* Skip to the end character or a colon, whichever comes first.
*/
for (tstr = str + 2; *tstr != '\0'; tstr++) {
/* Track depth so we can spot parse errors. */
if (*tstr == startc)
depth++;
if (*tstr == endc) {
if (--depth == 0)
break;
}
if (depth == 1 && *tstr == ':')
break;
/* A variable inside a variable, expand. */
if (*tstr == '$') {
int rlen;
void *freeIt;
char *rval = Var_Parse(tstr, ctxt, flags, &rlen, &freeIt);
if (rval != NULL)
Buf_AddBytes(&buf, strlen(rval), rval);
free(freeIt);
tstr += rlen - 1;
} else
Buf_AddByte(&buf, *tstr);
}
if (*tstr == ':') {
haveModifier = TRUE;
} else if (*tstr == endc) {
haveModifier = FALSE;
} else {
/*
* If we never did find the end character, return NULL
* right now, setting the length to be the distance to
* the end of the string, since that's what make does.
*/
*lengthPtr = tstr - str;
Buf_Destroy(&buf, TRUE);
return var_Error;
}
str = Buf_GetAll(&buf, &vlen);
/*
* At this point, str points into newly allocated memory from
* buf, containing only the name of the variable.
*
* start and tstr point into the const string that was pointed
* to by the original value of the str parameter. start points
* to the '$' at the beginning of the string, while tstr points
* to the char just after the end of the variable name -- this
* will be '\0', ':', PRCLOSE, or BRCLOSE.
*/
v = VarFind(str, ctxt, FIND_ENV | FIND_GLOBAL | FIND_CMD);
/*
* Check also for bogus D and F forms of local variables since we're
* in a local context and the name is the right length.
*/
if ((v == NULL) && (ctxt != VAR_CMD) && (ctxt != VAR_GLOBAL) &&
(vlen == 2) && (str[1] == 'F' || str[1] == 'D') &&
strchr("@%?*!<>", str[0]) != NULL) {
/*
* Well, it's local -- go look for it.
*/
name[0] = *str;
name[1] = '\0';
v = VarFind(name, ctxt, 0);
if (v != NULL) {
if (str[1] == 'D') {
extramodifiers = "H:";
} else { /* F */
extramodifiers = "T:";
}
}
}
if (v == NULL) {
if (((vlen == 1) ||
(((vlen == 2) && (str[1] == 'F' || str[1] == 'D')))) &&
((ctxt == VAR_CMD) || (ctxt == VAR_GLOBAL)))
{
/*
* If substituting a local variable in a non-local context,
* assume it's for dynamic source stuff. We have to handle
* this specially and return the longhand for the variable
* with the dollar sign escaped so it makes it back to the
* caller. Only four of the local variables are treated
* specially as they are the only four that will be set
* when dynamic sources are expanded.
*/
switch (*str) {
case '@':
case '%':
case '*':
case '!':
dynamic = TRUE;
break;
}
} else if (vlen > 2 && *str == '.' &&
isupper((unsigned char) str[1]) &&
(ctxt == VAR_CMD || ctxt == VAR_GLOBAL))
{
int len = vlen - 1;
if ((strncmp(str, ".TARGET", len) == 0) ||
(strncmp(str, ".ARCHIVE", len) == 0) ||
(strncmp(str, ".PREFIX", len) == 0) ||
(strncmp(str, ".MEMBER", len) == 0))
{
dynamic = TRUE;
}
}
if (!haveModifier) {
/*
* No modifiers -- have specification length so we can return
* now.
*/
*lengthPtr = tstr - start + 1;
if (dynamic) {
char *pstr = bmake_strndup(start, *lengthPtr);
*freePtr = pstr;
Buf_Destroy(&buf, TRUE);
return pstr;
} else {
Buf_Destroy(&buf, TRUE);
return (flags & VARF_UNDEFERR) ? var_Error : varNoError;
}
} else {
/*
* Still need to get to the end of the variable specification,
* so kludge up a Var structure for the modifications
*/
v = bmake_malloc(sizeof(Var));
v->name = UNCONST(str);
Buf_Init(&v->val, 1);
v->flags = VAR_JUNK;
Buf_Destroy(&buf, FALSE);
}
} else
Buf_Destroy(&buf, TRUE);
}
if (v->flags & VAR_IN_USE) {
Fatal("Variable %s is recursive.", v->name);
/*NOTREACHED*/
} else {
v->flags |= VAR_IN_USE;
}
/*
* Before doing any modification, we have to make sure the value
* has been fully expanded. If it looks like recursion might be
* necessary (there's a dollar sign somewhere in the variable's value)
* we just call Var_Subst to do any other substitutions that are
* necessary. Note that the value returned by Var_Subst will have
* been dynamically-allocated, so it will need freeing when we
* return.
*/
nstr = Buf_GetAll(&v->val, NULL);
if (strchr(nstr, '$') != NULL && (flags & VARF_WANTRES) != 0) {
nstr = Var_Subst(NULL, nstr, ctxt, flags);
*freePtr = nstr;
}
v->flags &= ~VAR_IN_USE;
if (nstr != NULL && (haveModifier || extramodifiers != NULL)) {
void *extraFree;
int used;
extraFree = NULL;
if (extramodifiers != NULL) {
nstr = ApplyModifiers(nstr, extramodifiers, '(', ')',
v, ctxt, flags, &used, &extraFree);
}
if (haveModifier) {
/* Skip initial colon. */
tstr++;
nstr = ApplyModifiers(nstr, tstr, startc, endc,
v, ctxt, flags, &used, freePtr);
tstr += used;
free(extraFree);
} else {
*freePtr = extraFree;
}
}
*lengthPtr = tstr - start + (*tstr ? 1 : 0);
if (v->flags & VAR_FROM_ENV) {
Boolean destroy = FALSE;
if (nstr != Buf_GetAll(&v->val, NULL)) {
destroy = TRUE;
} else {
/*
* Returning the value unmodified, so tell the caller to free
* the thing.
*/
*freePtr = nstr;
}
VarFreeEnv(v, destroy);
} else if (v->flags & VAR_JUNK) {
/*
* Perform any free'ing needed and set *freePtr to NULL so the caller
* doesn't try to free a static pointer.
* If VAR_KEEP is also set then we want to keep str as is.
*/
if (!(v->flags & VAR_KEEP)) {
if (*freePtr) {
free(nstr);
*freePtr = NULL;
}
if (dynamic) {
nstr = bmake_strndup(start, *lengthPtr);
*freePtr = nstr;
} else {
nstr = (flags & VARF_UNDEFERR) ? var_Error : varNoError;
}
}
if (nstr != Buf_GetAll(&v->val, NULL))
Buf_Destroy(&v->val, TRUE);
free(v->name);
free(v);
}
return nstr;
}
/*-
*-----------------------------------------------------------------------
* Var_Subst --
* Substitute for all variables in the given string in the given context.
* If flags & VARF_UNDEFERR, Parse_Error will be called when an undefined
* variable is encountered.
*
* Input:
* var Named variable || NULL for all
* str the string which to substitute
* ctxt the context wherein to find variables
* flags VARF_UNDEFERR if undefineds are an error
* VARF_WANTRES if we actually want the result
* VARF_ASSIGN if we are in a := assignment
*
* Results:
* The resulting string.
*
* Side Effects:
* None.
*-----------------------------------------------------------------------
*/
char *
Var_Subst(const char *var, const char *str, GNode *ctxt, Varf_Flags flags)
{
Buffer buf; /* Buffer for forming things */
char *val; /* Value to substitute for a variable */
int length; /* Length of the variable invocation */
Boolean trailingBslash; /* variable ends in \ */
void *freeIt = NULL; /* Set if it should be freed */
static Boolean errorReported; /* Set true if an error has already
* been reported to prevent a plethora
* of messages when recursing */
Buf_Init(&buf, 0);
errorReported = FALSE;
trailingBslash = FALSE;
while (*str) {
if (*str == '\n' && trailingBslash)
Buf_AddByte(&buf, ' ');
if (var == NULL && (*str == '$') && (str[1] == '$')) {
/*
* A dollar sign may be escaped either with another dollar sign.
* In such a case, we skip over the escape character and store the
* dollar sign into the buffer directly.
*/
if (save_dollars && (flags & VARF_ASSIGN))
Buf_AddByte(&buf, *str);
str++;
Buf_AddByte(&buf, *str);
str++;
} else if (*str != '$') {
/*
* Skip as many characters as possible -- either to the end of
* the string or to the next dollar sign (variable invocation).
*/
const char *cp;
for (cp = str++; *str != '$' && *str != '\0'; str++)
continue;
Buf_AddBytes(&buf, str - cp, cp);
} else {
if (var != NULL) {
int expand;
for (;;) {
if (str[1] == '\0') {
/* A trailing $ is kind of a special case */
Buf_AddByte(&buf, str[0]);
str++;
expand = FALSE;
} else if (str[1] != PROPEN && str[1] != BROPEN) {
if (str[1] != *var || strlen(var) > 1) {
Buf_AddBytes(&buf, 2, str);
str += 2;
expand = FALSE;
} else
expand = TRUE;
break;
} else {
const char *p;
/* Scan up to the end of the variable name. */
for (p = &str[2]; *p &&
*p != ':' && *p != PRCLOSE && *p != BRCLOSE; p++)
if (*p == '$')
break;
/*
* A variable inside the variable. We cannot expand
* the external variable yet, so we try again with
* the nested one
*/
if (*p == '$') {
Buf_AddBytes(&buf, p - str, str);
str = p;
continue;
}
if (strncmp(var, str + 2, p - str - 2) != 0 ||
var[p - str - 2] != '\0') {
/*
* Not the variable we want to expand, scan
* until the next variable
*/
for (; *p != '$' && *p != '\0'; p++)
continue;
Buf_AddBytes(&buf, p - str, str);
str = p;
expand = FALSE;
} else
expand = TRUE;
break;
}
}
if (!expand)
continue;
}
val = Var_Parse(str, ctxt, flags, &length, &freeIt);
/*
* When we come down here, val should either point to the
* value of this variable, suitably modified, or be NULL.
* Length should be the total length of the potential
* variable invocation (from $ to end character...)
*/
if (val == var_Error || val == varNoError) {
/*
* If performing old-time variable substitution, skip over
* the variable and continue with the substitution. Otherwise,
* store the dollar sign and advance str so we continue with
* the string...
*/
if (oldVars) {
str += length;
} else if ((flags & VARF_UNDEFERR) || val == var_Error) {
/*
* If variable is undefined, complain and skip the
* variable. The complaint will stop us from doing anything
* when the file is parsed.
*/
if (!errorReported) {
Parse_Error(PARSE_FATAL, "Undefined variable \"%.*s\"",
length, str);
}
str += length;
errorReported = TRUE;
} else {
Buf_AddByte(&buf, *str);
str += 1;
}
} else {
/*
* We've now got a variable structure to store in. But first,
* advance the string pointer.
*/
str += length;
/*
* Copy all the characters from the variable value straight
* into the new string.
*/
length = strlen(val);
Buf_AddBytes(&buf, length, val);
trailingBslash = length > 0 && val[length - 1] == '\\';
}
free(freeIt);
freeIt = NULL;
}
}
return Buf_DestroyCompact(&buf);
}
/* Initialize the module. */
void
Var_Init(void)
{
VAR_INTERNAL = Targ_NewGN("Internal");
VAR_GLOBAL = Targ_NewGN("Global");
VAR_CMD = Targ_NewGN("Command");
}
void
Var_End(void)
{
}
/****************** PRINT DEBUGGING INFO *****************/
static void
VarPrintVar(void *vp, void *data MAKE_ATTR_UNUSED)
{
Var *v = (Var *)vp;
fprintf(debug_file, "%-16s = %s\n", v->name, Buf_GetAll(&v->val, NULL));
}
/*-
*-----------------------------------------------------------------------
* Var_Dump --
* print all variables in a context
*-----------------------------------------------------------------------
*/
void
Var_Dump(GNode *ctxt)
{
Hash_ForEach(&ctxt->context, VarPrintVar, NULL);
}
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