Add support for "ifdef <attribute>" blocks. It goes like this:
ifdef <attr> / ifndef <attr> elifdef <attr> elifndef <attr> else endif No indentation is possible for now, it will come later.
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cube
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@ -1,4 +1,4 @@
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.\" $NetBSD: config.5,v 1.11 2007/09/10 10:54:20 cube Exp $
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.\" $NetBSD: config.5,v 1.12 2007/11/09 23:41:08 cube Exp $
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.\"
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.\" Copyright (c) 2006, 2007 The NetBSD Foundation.
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.\" All rights reserved.
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@ -27,7 +27,7 @@
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 9, 2007
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.Dd November 9, 2007
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.Dt CONFIG 5
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.Os
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.Sh NAME
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@ -268,6 +268,19 @@ The
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.Ar path
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argument is either absolute or relative to the current defined prefix, which
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defaults to the top of ther kernel source tree.
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.It Ic ifdef Ar attribute
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.It Ic ifndef Ar attribute
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.It Ic elifdef Ar attribute
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.It Ic elifndef Ar attribute
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.It Ic else
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.It Ic endif
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Conditionally interprets portions of the current file.
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Those statements depend on whether or not the given
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.Ar attribute
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has been previously defined, through
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.Ic define
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or any other statement that implicitely defines attributes such as
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.Ic device .
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.El
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.Ss PREAMBLE
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In addition to
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@ -1,4 +1,4 @@
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/* $NetBSD: defs.h,v 1.20 2007/01/13 23:47:36 christos Exp $ */
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/* $NetBSD: defs.h,v 1.21 2007/11/09 23:41:08 cube Exp $ */
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/*
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* Copyright (c) 1992, 1993
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@ -98,7 +98,7 @@ extern const char *progname;
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* The next two lines define the current version of the config(1) binary,
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* and the minimum version of the configuration files it supports.
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*/
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#define CONFIG_VERSION 20070109
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#define CONFIG_VERSION 20071109
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#define CONFIG_MINVERSION 0
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/*
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@ -1,5 +1,5 @@
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%{
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/* $NetBSD: scan.l,v 1.8 2007/11/09 05:06:08 cube Exp $ */
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/* $NetBSD: scan.l,v 1.9 2007/11/09 23:41:08 cube Exp $ */
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/*
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* Copyright (c) 1992, 1993
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@ -59,7 +59,35 @@ int yyline;
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const char *yyfile;
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const char *lastfile;
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char curinclpath[PATH_MAX];
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int ifdefstate = -1;
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int st;
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#define IDS_PARENT_DISABLED \
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((ifdefstate > 6) && ((((ifdefstate/6)-1) & 1) == 1))
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#define IDS_MAX_DEPTH 362797056 /* 6^11 */
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/* States for ifdefstate:
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0 -> matched ifdef
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1 -> unmatched ifdef
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2 -> matched elifdef
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3 -> unmatched elifdef
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4 -> matched else
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5 -> unmatched else
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Upon "ifdef", add one and multiply by 6.
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Upon "endif", divide by 6, remove 1.
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ifdef -> MATCH => continue
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MISMATCH => set to 1
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elifdef -> if (!1) -> MISMATCH
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MATCH => set to 2
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MISMATCH => if (2 || 3) set to 3, else set to 1
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else -> if (1) -> MATCH
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MATCH => set to 4
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MISMATCH => set to 5
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in each case, if parent & 1 == 1, MISMATCH
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*/
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/*
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* Data for returning to previous files from include files.
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*/
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@ -70,10 +98,12 @@ struct incl {
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int in_lineno; /* previous line number */
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int in_ateof; /* token to insert at EOF */
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int in_interesting; /* previous value for "interesting" */
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int in_ifdefstate; /* conditional level */
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};
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static struct incl *incl;
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static int endinclude(void);
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static int getincludepath(void);
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static int getcurifdef(void);
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#define yywrap() 1
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@ -85,6 +115,8 @@ WORD [A-Za-z_][-A-Za-z_0-9]*
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FILENAME ({PATH}|\"{QCHARS}\")
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RESTOFLINE [ \t]*(#[^\n]*)?\n
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%x IGNORED
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%%
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/* Local variables for yylex() */
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int tok;
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@ -135,6 +167,107 @@ with return WITH;
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\+= return PLUSEQ;
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:= return COLONEQ;
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<*>ifdef[ \t]+{WORD}{RESTOFLINE} {
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ifdefstate = (ifdefstate + 1) * 6;
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if (ifdefstate >= IDS_MAX_DEPTH) {
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yyerror("too many levels of conditional");
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}
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if (!IDS_PARENT_DISABLED && getcurifdef()) {
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BEGIN(INITIAL);
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} else {
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ifdefstate++;
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BEGIN(IGNORED);
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}
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yyline++;
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}
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<*>ifndef[ \t]+{WORD}{RESTOFLINE} {
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ifdefstate = (ifdefstate + 1) * 6;
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if (ifdefstate >= IDS_MAX_DEPTH) {
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yyerror("too many levels of conditional");
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}
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if (!IDS_PARENT_DISABLED && !getcurifdef()) {
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BEGIN(INITIAL);
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} else {
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ifdefstate++;
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BEGIN(IGNORED);
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}
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yyline++;
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}
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<*>elifdef[ \t]+{WORD}{RESTOFLINE} {
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st = ifdefstate % 6;
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if (ifdefstate < 0 || st > 3) {
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yyerror("mismatched elifdef");
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}
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if (IDS_PARENT_DISABLED ||
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st != 1 || !getcurifdef()) {
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if (st == 2 || st == 3) {
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ifdefstate += 3 - st;
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} else {
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ifdefstate += 1 - st;
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}
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BEGIN(IGNORED);
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} else {
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ifdefstate++;
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BEGIN(INITIAL);
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}
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yyline++;
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}
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<*>elifndef[ \t]+{WORD}{RESTOFLINE} {
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st = ifdefstate % 6;
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if (ifdefstate < 0 || st > 3) {
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yyerror("mismatched elifndef");
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}
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if (IDS_PARENT_DISABLED ||
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st != 1 || getcurifdef()) {
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if (st == 2 || st == 3) {
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ifdefstate += 3 - st;
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} else {
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ifdefstate += 1 - st;
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}
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BEGIN(IGNORED);
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} else {
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ifdefstate++;
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BEGIN(INITIAL);
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}
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yyline++;
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}
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<*>else{RESTOFLINE} {
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st = ifdefstate % 6;
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if (ifdefstate < 0 || st > 3) {
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yyerror("mismatched else");
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}
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if (!IDS_PARENT_DISABLED && (st == 1)) {
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ifdefstate += 3;
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BEGIN(INITIAL);
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} else {
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ifdefstate += 5 - st;
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BEGIN(IGNORED);
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}
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yyline++;
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}
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<*>endif{RESTOFLINE} {
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if (ifdefstate < 0) {
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yyerror("mismatched endif");
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}
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if (!IDS_PARENT_DISABLED) {
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BEGIN(INITIAL);
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}
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ifdefstate = (ifdefstate/6) - 1;
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yyline++;
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}
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<IGNORED>\n {
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yyline++;
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}
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<IGNORED>. /* ignore */
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include[ \t]+{FILENAME}{RESTOFLINE} {
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yyline++;
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if (getincludepath()) {
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@ -224,7 +357,10 @@ package[ \t]+{FILENAME}{RESTOFLINE} {
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#.* { /* ignored (comment) */; }
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[ \t]+ { /* ignored (white space) */; }
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. { return yytext[0]; }
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<<EOF>> {
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<*><<EOF>> {
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if (ifdefstate > (incl == NULL ? -1 : incl->in_ifdefstate)) {
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yyerror("reached EOF while looking for endif");
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}
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if (incl == NULL)
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return YY_NULL;
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tok = endinclude();
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@ -380,6 +516,7 @@ include(const char *fname, int ateof, int conditional, int direct)
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in->in_lineno = yyline;
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in->in_ateof = ateof;
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in->in_interesting = interesting;
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in->in_ifdefstate = ifdefstate;
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interesting = direct & interesting;
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if (interesting)
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logconfig_include(fp, fname);
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@ -465,3 +602,20 @@ currentline(void)
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return (yyline - (yychar == '\n'));
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}
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static int
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getcurifdef(void)
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{
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char *p = yytext, *q;
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while (*p && isascii((unsigned int)*p) && !isspace((unsigned int)*p))
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p++;
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while (*p && isascii((unsigned int)*p) && isspace((unsigned int)*p))
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p++;
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q = p;
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while (*q && isascii((unsigned int)*q) && !isspace((unsigned int)*q))
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q++;
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*q = '\0';
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return ht_lookup(attrtab, intern(p)) != NULL;
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}
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