Ok, this commit is _huge_ and its gonna change the world. I've

been working on a new config system on and off for about 6 months
now, but I've never been fully satisfied.  Well, I'm finally am
happy with the new config system, so here it is.  This completely
removes the old uClibc configuration system, and replaces it with
an entirely new system based on LinuxKernelConf, from
    http://www.xs4all.nl/~zippel/lc/
As it turns out, Linus has just merged LinuxKernelConf into Linux
2.5.45, so it looks like I made the right choice.

I have thus far updated only x86.  I'll be updating the other
architectures shortly.
         -Erik

1 files changed, 323 insertions, 0 deletions

diff --git a/extra/config/zconf.l b/extra/config/zconf.l
new file mode 100644
index 000000000..6d81e5eb7
--- /dev/null
+++ b/extra/config/zconf.l
@@ -0,0 +1,323 @@
+%option backup nostdinit noyywrap full ecs
+%option 8bit backup nodefault perf-report perf-report
+%x COMMAND HELP STRING PARAM
+%{
+/*
+ * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
+ * Released under the terms of the GNU GPL v2.0.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define LKC_DIRECT_LINK
+#include "lkc.h"
+#include "zconf.tab.h"
+
+#define START_STRSIZE	16
+
+char *text;
+static char *text_ptr;
+static int text_size, text_asize;
+
+struct buffer {
+        struct buffer *parent;
+        YY_BUFFER_STATE state;
+};
+
+struct buffer *current_buf;
+
+static int last_ts, first_ts;
+
+static void zconf_endhelp(void);
+static struct buffer *zconf_endfile(void);
+
+void new_string(void)
+{
+	text = malloc(START_STRSIZE);
+	text_asize = START_STRSIZE;
+	text_ptr = text;
+	text_size = 0;
+	*text_ptr = 0;
+}
+
+void append_string(const char *str, int size)
+{
+	int new_size = text_size + size + 1;
+	if (new_size > text_asize) {
+		text = realloc(text, new_size);
+		text_asize = new_size;
+		text_ptr = text + text_size;
+	}
+	memcpy(text_ptr, str, size);
+	text_ptr += size;
+	text_size += size;
+	*text_ptr = 0;
+}
+
+void alloc_string(const char *str, int size)
+{
+	text = malloc(size + 1);
+	memcpy(text, str, size);
+	text[size] = 0;
+}
+%}
+
+ws	[ \n\t]
+n	[A-Za-z0-9_]
+
+%%
+	int str = 0;
+	int ts, i;
+
+[ \t]*#.*\n	current_file->lineno++;
+[ \t]*#.*
+
+[ \t]*\n	current_file->lineno++; return T_EOL;
+
+[ \t]+	{
+	BEGIN(COMMAND);
+}
+
+.	{
+	unput(yytext[0]);
+	//printf("new config: ");
+	//symbol_end(NULL);
+	BEGIN(COMMAND);
+}
+
+
+<COMMAND>{
+	"mainmenu"		BEGIN(PARAM); return T_MAINMENU;
+	"menu"			BEGIN(PARAM); return T_MENU;
+	"endmenu"		BEGIN(PARAM); return T_ENDMENU;
+	"source"		BEGIN(PARAM); return T_SOURCE;
+	"choice"		BEGIN(PARAM); return T_CHOICE;
+	"endchoice"		BEGIN(PARAM); return T_ENDCHOICE;
+	"comment"		BEGIN(PARAM); return T_COMMENT;
+	"config"		BEGIN(PARAM); return T_CONFIG;
+	"help"			BEGIN(PARAM); return T_HELP;
+	"if"			BEGIN(PARAM); return T_IF;
+	"endif"			BEGIN(PARAM); return T_ENDIF;
+	"depends"		BEGIN(PARAM); return T_DEPENDS;
+	"requires"		BEGIN(PARAM); return T_REQUIRES;
+	"optional"		BEGIN(PARAM); return T_OPTIONAL;
+	"default"		BEGIN(PARAM); return T_DEFAULT;
+	"prompt"		BEGIN(PARAM); return T_PROMPT;
+	"tristate"		BEGIN(PARAM); return T_TRISTATE;
+	"bool"			BEGIN(PARAM); return T_BOOLEAN;
+	"boolean"		BEGIN(PARAM); return T_BOOLEAN;
+	"int"			BEGIN(PARAM); return T_INT;
+	"hex"			BEGIN(PARAM); return T_HEX;
+	"string"		BEGIN(PARAM); return T_STRING;
+	{n}+	{
+		alloc_string(yytext, yyleng);
+		zconflval.string = text;
+		return T_WORD;
+	}
+	.
+	\n	current_file->lineno++; BEGIN(INITIAL);
+}
+
+<PARAM>{
+	"&&"	return T_AND;
+	"||"	return T_OR;
+	"("	return T_OPEN_PAREN;
+	")"	return T_CLOSE_PAREN;
+	"!"	return T_NOT;
+	"="	return T_EQUAL;
+	"!="	return T_UNEQUAL;
+	"if"	return T_IF;
+	"on"	return T_ON;
+	\"|\'	{
+		str = yytext[0];
+		new_string();
+		BEGIN(STRING);
+	}
+	\n	BEGIN(INITIAL); current_file->lineno++; return T_EOL;
+	---	/* ignore */
+	({n}|[-/.])+	{
+		alloc_string(yytext, yyleng);
+		zconflval.string = text;
+		return T_WORD;
+	}
+	.
+}
+
+<STRING>{
+	[^'"\n\\]+	{
+		append_string(yytext, yyleng);
+	}
+	\'|\"	{
+		if (str == yytext[0]) {
+			BEGIN(PARAM);
+			zconflval.string = text;
+			//printf("s:%s\n", text);
+			return T_STRING;
+		} else
+			append_string(yytext, 1);
+	}
+	\\[ \t]*\n	append_string(yytext+yyleng-1, 1); current_file->lineno++;
+	\\[ \t]*	append_string(yytext+1, yyleng-1);
+	\\.		append_string(yytext+1, 1);
+	\n	{
+		//printf(":%d: open string!\n", current_file->lineno+1);
+		exit(0);
+	}
+	<<EOF>>	{
+		//printf(":%d: open string!\n", current_file->lineno+1);
+		exit(0);
+	}
+}
+
+<HELP>{
+	[ \t]+	{
+		ts = 0;
+		for (i = 0; i < yyleng; i++) {
+			if (yytext[i] == '\t')
+				ts = (ts & ~7) + 8;
+			else
+				ts++;
+		}
+		last_ts = ts;
+		if (first_ts) {
+			if (ts < first_ts) {
+				zconf_endhelp();
+				return T_HELPTEXT;
+			}
+			ts -= first_ts;
+			while (ts > 8) {
+				append_string("        ", 8);
+				ts -= 8;
+			}
+			append_string("        ", ts);
+		}
+		
+	}
+	\n/[^ \t\n] {
+		current_file->lineno++;
+		zconf_endhelp();
+		return T_HELPTEXT;
+	}
+	[ \t]*\n	{
+		current_file->lineno++;
+		append_string("\n", 1);
+	}
+	[^ \t\n].* {
+		append_string(yytext, yyleng);
+		if (!first_ts)
+			first_ts = last_ts;
+	}
+	<<EOF>>	{
+		zconf_endhelp();
+		return T_HELPTEXT;
+	}
+}
+
+<<EOF>>	{
+	if (current_buf) {
+		zconf_endfile();
+		return T_EOF;
+	}
+	yyterminate();
+}
+
+%%
+void zconf_starthelp(void)
+{
+	new_string();
+	last_ts = first_ts = 0;
+	BEGIN(HELP);
+}
+
+static void zconf_endhelp(void)
+{
+	zconflval.string = text;
+	BEGIN(INITIAL); 
+}
+
+void zconf_initscan(const char *name)
+{
+	yyin = fopen(name, "r");
+	if (!yyin) {
+		printf("can't find file %s\n", name);
+		exit(1);
+	}
+	//fprintf(stderr, "zconf_initscan: %s\n", name);
+
+	current_buf = malloc(sizeof(*current_buf));
+	memset(current_buf, 0, sizeof(*current_buf));
+
+	current_file = file_lookup(name);
+	current_file->lineno = 1;
+	current_file->flags = FILE_BUSY;
+}
+
+void zconf_nextfile(const char *name)
+{
+	struct file *file = file_lookup(name);
+	struct buffer *buf = malloc(sizeof(*buf));
+	memset(buf, 0, sizeof(*buf));
+
+	current_buf->state = YY_CURRENT_BUFFER;
+	yyin = fopen(name, "r");
+	if (!yyin) {
+		printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name);
+		exit(1);
+	}
+	yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
+	buf->parent = current_buf;
+	current_buf = buf;
+
+	//fprintf(stderr, "zconf_nextfile: %s\n", name);
+
+	if (file->flags & FILE_BUSY) {
+		printf("recursive scan (%s)?\n", name);
+		exit(1);
+	}
+	if (file->flags & FILE_SCANNED) {
+		printf("file %s already scanned?\n", name);
+		exit(1);
+	}
+	file->flags |= FILE_BUSY;
+	file->lineno = 1;
+	file->parent = current_file;
+	current_file = file;
+}
+
+static struct buffer *zconf_endfile(void)
+{
+	struct buffer *parent;
+
+	current_file->flags |= FILE_SCANNED;
+	current_file->flags &= ~FILE_BUSY;
+	current_file = current_file->parent;
+
+	parent = current_buf->parent;
+	if (parent) {
+		yy_delete_buffer(YY_CURRENT_BUFFER);
+		yy_switch_to_buffer(parent->state);
+	}
+	free(current_buf);
+	current_buf = parent;
+
+	return parent;
+}
+
+int zconf_lineno(void)
+{
+	if (current_buf)
+		return current_file->lineno;
+	else
+		return 0;
+}
+
+char *zconf_curname(void)
+{
+	if (current_buf)
+		return current_file->name;
+	else
+		return "<none>";
+}