[linux.git] / scripts / kconfig / zconf.l

%option nostdinit noyywrap never-interactive full ecs
%option 8bit nodefault perf-report perf-report
%option noinput
%x COMMAND HELP STRING PARAM
%{
/*
 * Copyright (C) 2002 Roman Zippel <[email protected]>
 * 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>

#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);

static void new_string(void)
{
	text = malloc(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 = realloc(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 = 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}+	{
		const 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}|[-/.])+	{
		const 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].* {
		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>>	{
	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 != NULL && 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;
}

void zconf_nextfile(const char *name)
{
	struct file *iter;
	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(file->name);
	if (!yyin) {
		printf("%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;

	for (iter = current_file->parent; iter; iter = iter->parent ) {
		if (!strcmp(current_file->name,iter->name) ) {
			printf("%s:%d: recursive inclusion detected. "
			       "Inclusion path:\n  current file : '%s'\n",
			       zconf_curname(), zconf_lineno(),
			       zconf_curname());
			iter = current_file->parent;
			while (iter && \
			       strcmp(iter->name,current_file->name)) {
				printf("  included from: '%s:%d'\n",
				       iter->name, iter->lineno-1);
				iter = iter->parent;
			}
			if (iter)
				printf("  included from: '%s:%d'\n",
				       iter->name, iter->lineno+1);
			exit(1);
		}
	}
	file->lineno = 1;
	file->parent = current_file;
	current_file = file;
}

static void zconf_endfile(void)
{
	struct buffer *parent;

	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;
}

const char *zconf_curname(void)
{
	return current_pos.file ? current_pos.file->name : "<none>";
}
Commit	Line	Data
674eed8a AL	1	%option nostdinit noyywrap never-interactive full ecs
674eed8a AL	2	%option 8bit nodefault perf-report perf-report
be2be1d5	3	%option noinput
1da177e4 LT	4	%x COMMAND HELP STRING PARAM
	5	%{
	6	/*
	7	* Copyright (C) 2002 Roman Zippel <[email protected]>
	8	* Released under the terms of the GNU GPL v2.0.
	9	*/
	10
	11	#include <limits.h>
	12	#include <stdio.h>
	13	#include <stdlib.h>
	14	#include <string.h>
	15	#include <unistd.h>
	16
1da177e4 LT	17	#include "lkc.h"
	18
	19	#define START_STRSIZE 16
	20
a02f0570 RZ	21	static struct {
	22	struct file *file;
	23	int lineno;
	24	} current_pos;
	25
7a88488b	26	static char *text;
1da177e4 LT	27	static int text_size, text_asize;
	28
	29	struct buffer {
	30	struct buffer *parent;
	31	YY_BUFFER_STATE state;
	32	};
	33
	34	struct buffer *current_buf;
	35
	36	static int last_ts, first_ts;
	37
	38	static void zconf_endhelp(void);
a02f0570	39	static void zconf_endfile(void);
1da177e4	40
65166571	41	static void new_string(void)
1da177e4 LT	42	{
	43	text = malloc(START_STRSIZE);
	44	text_asize = START_STRSIZE;
1da177e4	45	text_size = 0;
7a88488b	46	*text = 0;
1da177e4 LT	47	}
1da177e4 LT	48
65166571	49	static void append_string(const char *str, int size)
1da177e4 LT	50	{
	51	int new_size = text_size + size + 1;
	52	if (new_size > text_asize) {
7a88488b RZ	53	new_size += START_STRSIZE - 1;
7a88488b RZ	54	new_size &= -START_STRSIZE;
1da177e4 LT	55	text = realloc(text, new_size);
1da177e4 LT	56	text_asize = new_size;
1da177e4	57	}
7a88488b	58	memcpy(text + text_size, str, size);
1da177e4	59	text_size += size;
7a88488b	60	text[text_size] = 0;
1da177e4 LT	61	}
1da177e4 LT	62
65166571	63	static void alloc_string(const char *str, int size)
1da177e4 LT	64	{
	65	text = malloc(size + 1);
	66	memcpy(text, str, size);
	67	text[size] = 0;
	68	}
	69	%}
	70
	71	ws [ \n\t]
	72	n [A-Za-z0-9_]
	73
	74	%%
	75	int str = 0;
	76	int ts, i;
	77
a02f0570 RZ	78	[ \t]#.\n \|
	79	[ \t]*\n {
	80	current_file->lineno++;
	81	return T_EOL;
	82	}
1da177e4 LT	83	[ \t]#.
1da177e4 LT	84
1da177e4 LT	85
	86	[ \t]+ {
	87	BEGIN(COMMAND);
	88	}
	89
	90	. {
	91	unput(yytext[0]);
	92	BEGIN(COMMAND);
	93	}
	94
	95
	96	<COMMAND>{
1da177e4	97	{n}+ {
61f956f5	98	const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
a02f0570 RZ	99	BEGIN(PARAM);
	100	current_pos.file = current_file;
	101	current_pos.lineno = current_file->lineno;
7a88488b	102	if (id && id->flags & TF_COMMAND) {
3370f9f0	103	zconflval.id = id;
7a88488b RZ	104	return id->token;
7a88488b RZ	105	}
1da177e4 LT	106	alloc_string(yytext, yyleng);
	107	zconflval.string = text;
	108	return T_WORD;
	109	}
	110	.
a02f0570 RZ	111	\n {
	112	BEGIN(INITIAL);
	113	current_file->lineno++;
	114	return T_EOL;
	115	}
1da177e4 LT	116	}
	117
	118	<PARAM>{
	119	"&&" return T_AND;
	120	"\|\|" return T_OR;
	121	"(" return T_OPEN_PAREN;
	122	")" return T_CLOSE_PAREN;
	123	"!" return T_NOT;
	124	"=" return T_EQUAL;
	125	"!=" return T_UNEQUAL;
1da177e4 LT	126	\"\|\' {
	127	str = yytext[0];
	128	new_string();
	129	BEGIN(STRING);
	130	}
	131	\n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
	132	--- /* ignore */
	133	({n}\|[-/.])+ {
61f956f5	134	const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
3370f9f0 RZ	135	if (id && id->flags & TF_PARAM) {
3370f9f0 RZ	136	zconflval.id = id;
7a88488b	137	return id->token;
3370f9f0	138	}
1da177e4 LT	139	alloc_string(yytext, yyleng);
	140	zconflval.string = text;
	141	return T_WORD;
	142	}
	143	#.* /* comment */
	144	\\\n current_file->lineno++;
	145	.
	146	<<EOF>> {
	147	BEGIN(INITIAL);
	148	}
	149	}
	150
	151	<STRING>{
	152	[^'"\\\n]+/\n {
	153	append_string(yytext, yyleng);
	154	zconflval.string = text;
	155	return T_WORD_QUOTE;
	156	}
	157	[^'"\\\n]+ {
	158	append_string(yytext, yyleng);
	159	}
	160	\\.?/\n {
	161	append_string(yytext + 1, yyleng - 1);
	162	zconflval.string = text;
	163	return T_WORD_QUOTE;
	164	}
	165	\\.? {
	166	append_string(yytext + 1, yyleng - 1);
	167	}
	168	\'\|\" {
	169	if (str == yytext[0]) {
	170	BEGIN(PARAM);
	171	zconflval.string = text;
	172	return T_WORD_QUOTE;
	173	} else
	174	append_string(yytext, 1);
	175	}
	176	\n {
	177	printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno());
	178	current_file->lineno++;
	179	BEGIN(INITIAL);
	180	return T_EOL;
	181	}
	182	<<EOF>> {
	183	BEGIN(INITIAL);
	184	}
	185	}
	186
	187	<HELP>{
	188	[ \t]+ {
	189	ts = 0;
	190	for (i = 0; i < yyleng; i++) {
	191	if (yytext[i] == '\t')
	192	ts = (ts & ~7) + 8;
	193	else
	194	ts++;
	195	}
	196	last_ts = ts;
	197	if (first_ts) {
	198	if (ts < first_ts) {
	199	zconf_endhelp();
	200	return T_HELPTEXT;
	201	}
	202	ts -= first_ts;
203	while (ts > 8) {
204	append_string(" ", 8);
205	ts -= 8;
206	}
207	append_string(" ", ts);
208	}
209	}
210	[ \t]*\n/[^ \t\n] {
211	current_file->lineno++;
212	zconf_endhelp();
213	return T_HELPTEXT;
214	}
215	[ \t]*\n {
216	current_file->lineno++;
217	append_string("\n", 1);
218	}
219	[^ \t\n].* {
f7a4b4cd EG	220	while (yyleng) {
	221	if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t'))
	222	break;
	223	yyleng--;
	224	}
1da177e4 LT	225	append_string(yytext, yyleng);
	226	if (!first_ts)
	227	first_ts = last_ts;
	228	}
	229	<<EOF>> {
	230	zconf_endhelp();
	231	return T_HELPTEXT;
	232	}
	233	}
	234
	235	<<EOF>> {
a02f0570	236	if (current_file) {
1da177e4	237	zconf_endfile();
a02f0570	238	return T_EOL;
1da177e4 LT	239	}
	240	fclose(yyin);
	241	yyterminate();
	242	}
	243
	244	%%
	245	void zconf_starthelp(void)
	246	{
	247	new_string();
	248	last_ts = first_ts = 0;
	249	BEGIN(HELP);
	250	}
	251
	252	static void zconf_endhelp(void)
	253	{
	254	zconflval.string = text;
	255	BEGIN(INITIAL);
	256	}
	257
	258
	259	/*
	260	* Try to open specified file with following names:
	261	* ./name
	262	* $(srctree)/name
	263	* The latter is used when srctree is separate from objtree
	264	* when compiling the kernel.
	265	* Return NULL if file is not found.
	266	*/
	267	FILE zconf_fopen(const char name)
	268	{
	269	char *env, fullname[PATH_MAX+1];
	270	FILE *f;
	271
	272	f = fopen(name, "r");
11de39e2	273	if (!f && name != NULL && name[0] != '/') {
1da177e4 LT	274	env = getenv(SRCTREE);
	275	if (env) {
	276	sprintf(fullname, "%s/%s", env, name);
	277	f = fopen(fullname, "r");
	278	}
	279	}
	280	return f;
	281	}
	282
	283	void zconf_initscan(const char *name)
	284	{
	285	yyin = zconf_fopen(name);
	286	if (!yyin) {
	287	printf("can't find file %s\n", name);
	288	exit(1);
	289	}
	290
	291	current_buf = malloc(sizeof(*current_buf));
	292	memset(current_buf, 0, sizeof(*current_buf));
	293
	294	current_file = file_lookup(name);
	295	current_file->lineno = 1;
1da177e4 LT	296	}
	297
	298	void zconf_nextfile(const char *name)
	299	{
f094f8a1	300	struct file *iter;
1da177e4 LT	301	struct file *file = file_lookup(name);
	302	struct buffer buf = malloc(sizeof(buf));
	303	memset(buf, 0, sizeof(*buf));
	304
	305	current_buf->state = YY_CURRENT_BUFFER;
e82dae90	306	yyin = zconf_fopen(file->name);
1da177e4	307	if (!yyin) {
e82dae90 AL	308	printf("%s:%d: can't open file \"%s\"\n",
e82dae90 AL	309	zconf_curname(), zconf_lineno(), file->name);
1da177e4 LT	310	exit(1);
	311	}
	312	yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
	313	buf->parent = current_buf;
	314	current_buf = buf;
	315
f094f8a1 YM	316	for (iter = current_file->parent; iter; iter = iter->parent ) {
	317	if (!strcmp(current_file->name,iter->name) ) {
	318	printf("%s:%d: recursive inclusion detected. "
	319	"Inclusion path:\n current file : '%s'\n",
	320	zconf_curname(), zconf_lineno(),
	321	zconf_curname());
	322	iter = current_file->parent;
	323	while (iter && \
	324	strcmp(iter->name,current_file->name)) {
	325	printf(" included from: '%s:%d'\n",
	326	iter->name, iter->lineno-1);
	327	iter = iter->parent;
	328	}
	329	if (iter)
	330	printf(" included from: '%s:%d'\n",
	331	iter->name, iter->lineno+1);
	332	exit(1);
	333	}
1da177e4	334	}
1da177e4 LT	335	file->lineno = 1;
	336	file->parent = current_file;
	337	current_file = file;
	338	}
	339
a02f0570	340	static void zconf_endfile(void)
1da177e4 LT	341	{
	342	struct buffer *parent;
	343
1da177e4 LT	344	current_file = current_file->parent;
	345
	346	parent = current_buf->parent;
	347	if (parent) {
	348	fclose(yyin);
	349	yy_delete_buffer(YY_CURRENT_BUFFER);
	350	yy_switch_to_buffer(parent->state);
	351	}
	352	free(current_buf);
	353	current_buf = parent;
1da177e4 LT	354	}
	355
	356	int zconf_lineno(void)
	357	{
a02f0570	358	return current_pos.lineno;
1da177e4 LT	359	}
1da177e4 LT	360
2e7a0918	361	const char *zconf_curname(void)
1da177e4	362	{
a02f0570	363	return current_pos.file ? current_pos.file->name : "<none>";
1da177e4	364	}