mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Masahiro Yamada](/assets/img/avatar_default.png)
In Kconfig, like Python, you can enclose a string by double-quotes or single-quotes. So, both "foo" and 'foo' are allowed. The variable, "str", is used to remember whether the string started with a double-quote or a single-quote because open/closing quotation marks must match. The name "str" is too generic to understand the intent. Rename it to "open_quote", which is easier to understand. The type should be 'char'. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Boris Kolpackov <boris@codesynthesis.com>
468 lines
9 KiB
Text
468 lines
9 KiB
Text
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
|
|
*/
|
|
%option nostdinit noyywrap never-interactive full ecs
|
|
%option 8bit nodefault yylineno
|
|
%x ASSIGN_VAL HELP STRING
|
|
%{
|
|
|
|
#include <assert.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "lkc.h"
|
|
#include "parser.tab.h"
|
|
|
|
#define YY_DECL static int yylex1(void)
|
|
|
|
#define START_STRSIZE 16
|
|
|
|
static struct {
|
|
struct file *file;
|
|
int lineno;
|
|
} current_pos;
|
|
|
|
static int prev_prev_token = T_EOL;
|
|
static int prev_token = T_EOL;
|
|
static char *text;
|
|
static int text_size, text_asize;
|
|
|
|
struct buffer {
|
|
struct buffer *parent;
|
|
YY_BUFFER_STATE state;
|
|
};
|
|
|
|
static struct buffer *current_buf;
|
|
|
|
static int last_ts, first_ts;
|
|
|
|
static char *expand_token(const char *in, size_t n);
|
|
static void append_expanded_string(const char *in);
|
|
static void zconf_endhelp(void);
|
|
static void zconf_endfile(void);
|
|
|
|
static void new_string(void)
|
|
{
|
|
text = xmalloc(START_STRSIZE);
|
|
text_asize = START_STRSIZE;
|
|
text_size = 0;
|
|
*text = 0;
|
|
}
|
|
|
|
static 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 = xrealloc(text, new_size);
|
|
text_asize = new_size;
|
|
}
|
|
memcpy(text + text_size, str, size);
|
|
text_size += size;
|
|
text[text_size] = 0;
|
|
}
|
|
|
|
static void alloc_string(const char *str, int size)
|
|
{
|
|
text = xmalloc(size + 1);
|
|
memcpy(text, str, size);
|
|
text[size] = 0;
|
|
}
|
|
|
|
static void warn_ignored_character(char chr)
|
|
{
|
|
fprintf(stderr,
|
|
"%s:%d:warning: ignoring unsupported character '%c'\n",
|
|
current_file->name, yylineno, chr);
|
|
}
|
|
%}
|
|
|
|
n [A-Za-z0-9_-]
|
|
|
|
%%
|
|
char open_quote = 0;
|
|
|
|
#.* /* ignore comment */
|
|
[ \t]* /* whitespaces */
|
|
\\\n /* escaped new line */
|
|
\n return T_EOL;
|
|
"bool" return T_BOOL;
|
|
"choice" return T_CHOICE;
|
|
"comment" return T_COMMENT;
|
|
"config" return T_CONFIG;
|
|
"def_bool" return T_DEF_BOOL;
|
|
"def_tristate" return T_DEF_TRISTATE;
|
|
"default" return T_DEFAULT;
|
|
"depends" return T_DEPENDS;
|
|
"endchoice" return T_ENDCHOICE;
|
|
"endif" return T_ENDIF;
|
|
"endmenu" return T_ENDMENU;
|
|
"help" return T_HELP;
|
|
"hex" return T_HEX;
|
|
"if" return T_IF;
|
|
"imply" return T_IMPLY;
|
|
"int" return T_INT;
|
|
"mainmenu" return T_MAINMENU;
|
|
"menu" return T_MENU;
|
|
"menuconfig" return T_MENUCONFIG;
|
|
"modules" return T_MODULES;
|
|
"on" return T_ON;
|
|
"optional" return T_OPTIONAL;
|
|
"prompt" return T_PROMPT;
|
|
"range" return T_RANGE;
|
|
"select" return T_SELECT;
|
|
"source" return T_SOURCE;
|
|
"string" return T_STRING;
|
|
"tristate" return T_TRISTATE;
|
|
"visible" return T_VISIBLE;
|
|
"||" return T_OR;
|
|
"&&" return T_AND;
|
|
"=" return T_EQUAL;
|
|
"!=" return T_UNEQUAL;
|
|
"<" return T_LESS;
|
|
"<=" return T_LESS_EQUAL;
|
|
">" return T_GREATER;
|
|
">=" return T_GREATER_EQUAL;
|
|
"!" return T_NOT;
|
|
"(" return T_OPEN_PAREN;
|
|
")" return T_CLOSE_PAREN;
|
|
":=" return T_COLON_EQUAL;
|
|
"+=" return T_PLUS_EQUAL;
|
|
\"|\' {
|
|
open_quote = yytext[0];
|
|
new_string();
|
|
BEGIN(STRING);
|
|
}
|
|
{n}+ {
|
|
alloc_string(yytext, yyleng);
|
|
yylval.string = text;
|
|
return T_WORD;
|
|
}
|
|
({n}|$)+ {
|
|
/* this token includes at least one '$' */
|
|
yylval.string = expand_token(yytext, yyleng);
|
|
if (strlen(yylval.string))
|
|
return T_WORD;
|
|
free(yylval.string);
|
|
}
|
|
. warn_ignored_character(*yytext);
|
|
|
|
<ASSIGN_VAL>{
|
|
[^[:blank:]\n]+.* {
|
|
alloc_string(yytext, yyleng);
|
|
yylval.string = text;
|
|
return T_ASSIGN_VAL;
|
|
}
|
|
\n { BEGIN(INITIAL); return T_EOL; }
|
|
.
|
|
}
|
|
|
|
<STRING>{
|
|
"$".* append_expanded_string(yytext);
|
|
[^$'"\\\n]+ {
|
|
append_string(yytext, yyleng);
|
|
}
|
|
\\.? {
|
|
append_string(yytext + 1, yyleng - 1);
|
|
}
|
|
\'|\" {
|
|
if (open_quote == yytext[0]) {
|
|
BEGIN(INITIAL);
|
|
yylval.string = text;
|
|
return T_WORD_QUOTE;
|
|
} else
|
|
append_string(yytext, 1);
|
|
}
|
|
\n {
|
|
fprintf(stderr,
|
|
"%s:%d:warning: multi-line strings not supported\n",
|
|
zconf_curname(), zconf_lineno());
|
|
unput('\n');
|
|
BEGIN(INITIAL);
|
|
yylval.string = text;
|
|
return T_WORD_QUOTE;
|
|
}
|
|
<<EOF>> {
|
|
BEGIN(INITIAL);
|
|
yylval.string = text;
|
|
return T_WORD_QUOTE;
|
|
}
|
|
}
|
|
|
|
<HELP>{
|
|
[ \t]+ {
|
|
int ts, i;
|
|
|
|
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] {
|
|
zconf_endhelp();
|
|
return T_HELPTEXT;
|
|
}
|
|
[ \t]*\n {
|
|
append_string("\n", 1);
|
|
}
|
|
[^ \t\n].* {
|
|
while (yyleng) {
|
|
if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
|
|
break;
|
|
yyleng--;
|
|
}
|
|
append_string(yytext, yyleng);
|
|
if (!first_ts)
|
|
first_ts = last_ts;
|
|
}
|
|
<<EOF>> {
|
|
zconf_endhelp();
|
|
return T_HELPTEXT;
|
|
}
|
|
}
|
|
|
|
<<EOF>> {
|
|
BEGIN(INITIAL);
|
|
|
|
if (prev_token != T_EOL && prev_token != T_HELPTEXT)
|
|
fprintf(stderr, "%s:%d:warning: no new line at end of file\n",
|
|
current_file->name, yylineno);
|
|
|
|
if (current_file) {
|
|
zconf_endfile();
|
|
return T_EOL;
|
|
}
|
|
fclose(yyin);
|
|
yyterminate();
|
|
}
|
|
|
|
%%
|
|
|
|
/* second stage lexer */
|
|
int yylex(void)
|
|
{
|
|
int token;
|
|
|
|
repeat:
|
|
token = yylex1();
|
|
|
|
if (prev_token == T_EOL || prev_token == T_HELPTEXT) {
|
|
if (token == T_EOL) {
|
|
/* Do not pass unneeded T_EOL to the parser. */
|
|
goto repeat;
|
|
} else {
|
|
/*
|
|
* For the parser, update file/lineno at the first token
|
|
* of each statement. Generally, \n is a statement
|
|
* terminator in Kconfig, but it is not always true
|
|
* because \n could be escaped by a backslash.
|
|
*/
|
|
current_pos.file = current_file;
|
|
current_pos.lineno = yylineno;
|
|
}
|
|
}
|
|
|
|
if (prev_prev_token == T_EOL && prev_token == T_WORD &&
|
|
(token == T_EQUAL || token == T_COLON_EQUAL || token == T_PLUS_EQUAL))
|
|
BEGIN(ASSIGN_VAL);
|
|
|
|
prev_prev_token = prev_token;
|
|
prev_token = token;
|
|
|
|
return token;
|
|
}
|
|
|
|
static char *expand_token(const char *in, size_t n)
|
|
{
|
|
char *out;
|
|
int c;
|
|
char c2;
|
|
const char *rest, *end;
|
|
|
|
new_string();
|
|
append_string(in, n);
|
|
|
|
/* get the whole line because we do not know the end of token. */
|
|
while ((c = input()) != EOF) {
|
|
if (c == '\n') {
|
|
unput(c);
|
|
break;
|
|
}
|
|
c2 = c;
|
|
append_string(&c2, 1);
|
|
}
|
|
|
|
rest = text;
|
|
out = expand_one_token(&rest);
|
|
|
|
/* push back unused characters to the input stream */
|
|
end = rest + strlen(rest);
|
|
while (end > rest)
|
|
unput(*--end);
|
|
|
|
free(text);
|
|
|
|
return out;
|
|
}
|
|
|
|
static void append_expanded_string(const char *str)
|
|
{
|
|
const char *end;
|
|
char *res;
|
|
|
|
str++;
|
|
|
|
res = expand_dollar(&str);
|
|
|
|
/* push back unused characters to the input stream */
|
|
end = str + strlen(str);
|
|
while (end > str)
|
|
unput(*--end);
|
|
|
|
append_string(res, strlen(res));
|
|
|
|
free(res);
|
|
}
|
|
|
|
void zconf_starthelp(void)
|
|
{
|
|
new_string();
|
|
last_ts = first_ts = 0;
|
|
BEGIN(HELP);
|
|
}
|
|
|
|
static void zconf_endhelp(void)
|
|
{
|
|
yylval.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 != NULL && name[0] != '/') {
|
|
env = getenv(SRCTREE);
|
|
if (env) {
|
|
snprintf(fullname, sizeof(fullname),
|
|
"%s/%s", env, name);
|
|
f = fopen(fullname, "r");
|
|
}
|
|
}
|
|
return f;
|
|
}
|
|
|
|
void zconf_initscan(const char *name)
|
|
{
|
|
yyin = zconf_fopen(name);
|
|
if (!yyin) {
|
|
fprintf(stderr, "can't find file %s\n", name);
|
|
exit(1);
|
|
}
|
|
|
|
current_buf = xmalloc(sizeof(*current_buf));
|
|
memset(current_buf, 0, sizeof(*current_buf));
|
|
|
|
current_file = file_lookup(name);
|
|
yylineno = 1;
|
|
}
|
|
|
|
void zconf_nextfile(const char *name)
|
|
{
|
|
struct file *iter;
|
|
struct file *file = file_lookup(name);
|
|
struct buffer *buf = xmalloc(sizeof(*buf));
|
|
memset(buf, 0, sizeof(*buf));
|
|
|
|
current_buf->state = YY_CURRENT_BUFFER;
|
|
yyin = zconf_fopen(file->name);
|
|
if (!yyin) {
|
|
fprintf(stderr, "%s:%d: can't open file \"%s\"\n",
|
|
zconf_curname(), zconf_lineno(), file->name);
|
|
exit(1);
|
|
}
|
|
yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
|
|
buf->parent = current_buf;
|
|
current_buf = buf;
|
|
|
|
current_file->lineno = yylineno;
|
|
file->parent = current_file;
|
|
|
|
for (iter = current_file; iter; iter = iter->parent) {
|
|
if (!strcmp(iter->name, file->name)) {
|
|
fprintf(stderr,
|
|
"Recursive inclusion detected.\n"
|
|
"Inclusion path:\n"
|
|
" current file : %s\n", file->name);
|
|
iter = file;
|
|
do {
|
|
iter = iter->parent;
|
|
fprintf(stderr, " included from: %s:%d\n",
|
|
iter->name, iter->lineno - 1);
|
|
} while (strcmp(iter->name, file->name));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
yylineno = 1;
|
|
current_file = file;
|
|
}
|
|
|
|
static void zconf_endfile(void)
|
|
{
|
|
struct buffer *parent;
|
|
|
|
current_file = current_file->parent;
|
|
if (current_file)
|
|
yylineno = current_file->lineno;
|
|
|
|
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;
|
|
}
|
|
|
|
const char *zconf_curname(void)
|
|
{
|
|
return current_pos.file ? current_pos.file->name : "<none>";
|
|
}
|