--- /dev/null
+%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 <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define LKC_DIRECT_LINK
+#include "lkc.h"
+
+#define START_STRSIZE 16
+
+static struct {
+ struct file *file;
+ int lineno;
+} current_pos;
+
+static char *text;
+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 void zconf_endfile(void);
+
+void new_string(void)
+{
+ text = malloc(START_STRSIZE);
+ text_asize = START_STRSIZE;
+ text_size = 0;
+ *text = 0;
+}
+
+void append_string(const char *str, int size)
+{
+ int new_size = text_size + size + 1;
+ if (new_size > text_asize) {
+ new_size += START_STRSIZE - 1;
+ new_size &= -START_STRSIZE;
+ text = realloc(text, new_size);
+ text_asize = new_size;
+ }
+ memcpy(text + text_size, str, size);
+ text_size += size;
+ text[text_size] = 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 |
+[ \t]*\n {
+ current_file->lineno++;
+ return T_EOL;
+}
+[ \t]*#.*
+
+
+[ \t]+ {
+ BEGIN(COMMAND);
+}
+
+. {
+ unput(yytext[0]);
+ BEGIN(COMMAND);
+}
+
+
+<COMMAND>{
+ {n}+ {
+ struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
+ BEGIN(PARAM);
+ current_pos.file = current_file;
+ current_pos.lineno = current_file->lineno;
+ if (id && id->flags & TF_COMMAND) {
+ zconflval.id = id;
+ return id->token;
+ }
+ alloc_string(yytext, yyleng);
+ zconflval.string = text;
+ return T_WORD;
+ }
+ .
+ \n {
+ BEGIN(INITIAL);
+ current_file->lineno++;
+ return T_EOL;
+ }
+}
+
+<PARAM>{
+ "&&" return T_AND;
+ "||" return T_OR;
+ "(" return T_OPEN_PAREN;
+ ")" return T_CLOSE_PAREN;
+ "!" return T_NOT;
+ "=" return T_EQUAL;
+ "!=" return T_UNEQUAL;
+ \"|\' {
+ str = yytext[0];
+ new_string();
+ BEGIN(STRING);
+ }
+ \n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
+ --- /* ignore */
+ ({n}|[-/.])+ {
+ struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
+ if (id && id->flags & TF_PARAM) {
+ zconflval.id = id;
+ return id->token;
+ }
+ alloc_string(yytext, yyleng);
+ zconflval.string = text;
+ return T_WORD;
+ }
+ #.* /* comment */
+ \\\n current_file->lineno++;
+ .
+ <<EOF>> {
+ BEGIN(INITIAL);
+ }
+}
+
+<STRING>{
+ [^'"\\\n]+/\n {
+ append_string(yytext, yyleng);
+ zconflval.string = text;
+ return T_WORD_QUOTE;
+ }
+ [^'"\\\n]+ {
+ append_string(yytext, yyleng);
+ }
+ \\.?/\n {
+ append_string(yytext + 1, yyleng - 1);
+ zconflval.string = text;
+ return T_WORD_QUOTE;
+ }
+ \\.? {
+ append_string(yytext + 1, yyleng - 1);
+ }
+ \'|\" {
+ if (str == yytext[0]) {
+ BEGIN(PARAM);
+ zconflval.string = text;
+ return T_WORD_QUOTE;
+ } else
+ append_string(yytext, 1);
+ }
+ \n {
+ printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
+ current_file->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);
+ }
+ }
+ [ \t]*\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_file) {
+ zconf_endfile();
+ return T_EOL;
+ }
+ 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);
+}
+
+
+/*
+ * Try to open specified file with following names:
+ * ./name
+ * $(srctree)/name
+ * The latter is used when srctree is separate from objtree
+ * when compiling the kernel.
+ * Return NULL if file is not found.
+ */
+FILE *zconf_fopen(const char *name)
+{
+ char *env, fullname[PATH_MAX+1];
+ FILE *f;
+
+ f = fopen(name, "r");
+ if (!f && name[0] != '/') {
+ env = getenv(SRCTREE);
+ if (env) {
+ sprintf(fullname, "%s/%s", env, name);
+ f = fopen(fullname, "r");
+ }
+ }
+ return f;
+}
+
+void zconf_initscan(const char *name)
+{
+ yyin = zconf_fopen(name);
+ 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 = zconf_fopen(name);
+ 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 void 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;
+}
+
+int zconf_lineno(void)
+{
+ return current_pos.lineno;
+}
+
+char *zconf_curname(void)
+{
+ return current_pos.file ? current_pos.file->name : "<none>";
+}
