Yet another major rework of the BusyBox config system, using the considerably

modified Kbuild system I put into uClibc.  With this, there should be no more
need to modify Rules.mak since I've moved all the interesting options into the
config system.  I think I've got everything updated, but you never know, I may
have made some mistakes, so watch closely.
 -Erik

1 files changed, 332 insertions, 0 deletions

diff --git a/scripts/config/zconf.l b/scripts/config/zconf.l
new file mode 100644
index 000000000..a412bf411
--- /dev/null
+++ b/scripts/config/zconf.l
@@ -0,0 +1,332 @@
+%option backup nostdinit noyywrap never-interactive 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]);
+        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;
+        }
+        .
+        <<EOF>> {
+                BEGIN(INITIAL);
+        }
+}
+
+<STRING>{
+        [^'"\\\n]+/\n   {
+                append_string(yytext, yyleng);
+                zconflval.string = text;
+                return T_STRING;
+        }
+        [^'"\\\n]+      {
+                append_string(yytext, yyleng);
+        }
+        \\.?/\n {
+                append_string(yytext+1, yyleng);
+                zconflval.string = text;
+                return T_STRING;
+        }
+        \\.?    {
+                append_string(yytext+1, yyleng);
+        }
+        \'|\"   {
+                if (str == yytext[0]) {
+                        BEGIN(PARAM);
+                        zconflval.string = text;
+                        return T_STRING;
+                } else
+                        append_string(yytext, 1);
+        }
+        \n      {
+                printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
+                BEGIN(INITIAL);
+                return T_EOL;
+        }
+        <<EOF>> {
+                BEGIN(INITIAL);
+        }
+}
+
+<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;
+        }
+        fclose(yyin);
+        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);
+        }
+
+        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;
+
+        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) {
+                fclose(yyin);
+                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>";
+}