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path: root/scripts/config/confdata.c

blob: 3a3a4bff4390f41be50cb0bc42670aaa4df624f8 (plain)

/* ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ /** * @file templates/halconf.h * @brief HAL configuration header. * @details HAL configuration file, this file allows to enable or disable the * various device drivers from your application. You may also use * this file in order to override the device drivers default settings. * * @addtogroup HAL_CONF * @{ */ #ifndef _HALCONF_H_ #define _HALCONF_H_ #include "mcuconf.h" /** * @brief Enables the PAL subsystem. */ #if !defined(HAL_USE_PAL) || defined(__DOXYGEN__) #define HAL_USE_PAL TRUE #endif /** * @brief Enables the ADC subsystem. */ #if !defined(HAL_USE_ADC) || defined(__DOXYGEN__) #define HAL_USE_ADC TRUE #endif /** * @brief Enables the DAC subsystem. */ #if !defined(HAL_USE_DAC) || defined(__DOXYGEN__) #define HAL_USE_DAC FALSE #endif /** * @brief Enables the CAN subsystem. */ #if !defined(HAL_USE_CAN) || defined(__DOXYGEN__) #define HAL_USE_CAN FALSE #endif /** * @brief Enables the EXT subsystem. */ #if !defined(HAL_USE_EXT) || defined(__DOXYGEN__) #define HAL_USE_EXT TRUE #endif /** * @brief Enables the GPT subsystem. */ #if !defined(HAL_USE_GPT) || defined(__DOXYGEN__) #define HAL_USE_GPT FALSE #endif /** * @brief Enables the I2C subsystem. */ #if !defined(HAL_USE_I2C) || defined(__DOXYGEN__) #define HAL_USE_I2C FALSE #endif /** * @brief Enables the I2S subsystem. */ #if !defined(HAL_USE_I2S) || defined(__DOXYGEN__) #define HAL_USE_I2S FALSE #endif /** * @brief Enables the ICU subsystem. */ #if !defined(HAL_USE_ICU) || defined(__DOXYGEN__) #define HAL_USE_ICU FALSE #endif /** * @brief Enables the MAC subsystem. */ #if !defined(HAL_USE_MAC) || defined(__DOXYGEN__) #define HAL_USE_MAC FALSE #endif /** * @brief Enables the MMC_SPI subsystem. */ #if !defined(HAL_USE_MMC_SPI) || defined(__DOXYGEN__) #define HAL_USE_MMC_SPI FALSE #endif /** * @brief Enables the PWM subsystem. */ #if !defined(HAL_USE_PWM) || defined(__DOXYGEN__) #define HAL_USE_PWM FALSE #endif /** * @brief Enables the RTC subsystem. */ #if !defined(HAL_USE_RTC) || defined(__DOXYGEN__) #define HAL_USE_RTC FALSE #endif /** * @brief Enables the SDC subsystem. */ #if !defined(HAL_USE_SDC) || defined(__DOXYGEN__) #define HAL_USE_SDC FALSE #endif /** * @brief Enables the SERIAL subsystem. */ #if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__) #define HAL_USE_SERIAL FALSE #endif /** * @brief Enables the SERIAL over USB subsystem. */ #if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__) #define HAL_USE_SERIAL_USB FALSE #endif /** * @brief Enables the SPI subsystem. */ #if !defined(HAL_USE_SPI) || defined(__DOXYGEN__) #define HAL_USE_SPI TRUE #endif /** * @brief Enables the UART subsystem. */ #if !defined(HAL_USE_UART) || defined(__DOXYGEN__) #define HAL_USE_UART TRUE #endif /** * @brief Enables the USB subsystem. */ #if !defined(HAL_USE_USB) || defined(__DOXYGEN__) #define HAL_USE_USB FALSE #endif /** * @brief Enables the WDG subsystem. */ #if !defined(HAL_USE_WDG) || defined(__DOXYGEN__) #define HAL_USE_WDG FALSE #endif /*===========================================================================*/ /* ADC driver related settings. */ /*===========================================================================*/ /** * @brief Enables synchronous APIs. * @note Disabling this option saves both code and data space. */ #if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__) #define ADC_USE_WAIT TRUE #endif /** * @brief Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs. * @note Disabling this option saves both code and data space. */ #if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) #define ADC_USE_MUTUAL_EXCLUSION TRUE #endif /*===========================================================================*/ /* CAN driver related settings. */ /*===========================================================================*/ /** * @brief Sleep mode related APIs inclusion switch. */ #if !defined(CAN_USE_SLEEP_MODE) || defined(__DOXYGEN__) #define CAN_USE_SLEEP_MODE TRUE #endif /*===========================================================================*/ /* I2C driver related settings. */ /*===========================================================================*/ /** * @brief Enables the mutual exclusion APIs on the I2C bus. */ #if !defined(I2C_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) #define I2C_USE_MUTUAL_EXCLUSION TRUE #endif /*===========================================================================*/ /* MAC driver related settings. */ /*===========================================================================*/ /** * @brief Enables an event sources for incoming packets. */ #if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__) #define MAC_USE_ZERO_COPY FALSE #endif /** * @brief Enables an event sources for incoming packets. */ #if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__) #define MAC_USE_EVENTS TRUE #endif /*===========================================================================*/ /* MMC_SPI driver related settings. */ /*===========================================================================*/ /** * @brief Delays insertions. * @details If enabled this options inserts delays into the MMC waiting * routines releasing some extra CPU time for the threads with * lower priority, this may slow down the driver a bit however. * This option is recommended also if the SPI driver does not * use a DMA channel and heavily loads the CPU. */ #if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__) #define MMC_NICE_WAITING TRUE #endif /*===========================================================================*/ /* SDC driver related settings. */ /*===========================================================================*/ /** * @brief Number of initialization attempts before rejecting the card. * @note Attempts are performed at 10mS intervals. */ #if !defined(SDC_INIT_RETRY) || defined(__DOXYGEN__) #define SDC_INIT_RETRY 100 #endif /** * @brief Include support for MMC cards. * @note MMC support is not yet implemented so this option must be kept * at @p FALSE. */ #if !defined(SDC_MMC_SUPPORT) || defined(__DOXYGEN__) #define SDC_MMC_SUPPORT FALSE #endif /** * @brief Delays insertions. * @details If enabled this options inserts delays into the MMC waiting * routines releasing some extra CPU time for the threads with * lower priority, this may slow down the driver a bit however. */ #if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__) #define SDC_NICE_WAITING TRUE #endif /*===========================================================================*/ /* SERIAL driver related settings. */ /*===========================================================================*/ /** * @brief Default bit rate. * @details Configuration parameter, this is the baud rate selected for the * default configuration. */ #if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__) #define SERIAL_DEFAULT_BITRATE 38400 #endif /** * @brief Serial buffers size. * @details Configuration parameter, you can change the depth of the queue * buffers depending on the requirements of your application. * @note The default is 64 bytes for both the transmission and receive * buffers. */ #if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__) #define SERIAL_BUFFERS_SIZE 16 #endif /*===========================================================================*/ /* SPI driver related settings. */ /*===========================================================================*/ /** * @brief Enables synchronous APIs. * @note Disabling this option saves both code and data space. */ #if !defined(SPI_USE_WAIT) || defined(__DOXYGEN__) #define SPI_USE_WAIT TRUE #endif /** * @brief Enables the @p spiAcquireBus() and @p spiReleaseBus() APIs. * @note Disabling this option saves both code and data space. */ #if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__) #define SPI_USE_MUTUAL_EXCLUSION TRUE #endif /*===========================================================================*/ /* Community drivers's includes */ /*===========================================================================*/ #include "halconf_community.h" #endif /* _HALCONF_H_ */ /** @} */

generated by cgit v1.2.3 (git 2.25.1) at 2026-01-17 12:51:39 +0000

/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 */

#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include "lkc.h"

struct conf_printer {
	void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
	void (*print_comment)(FILE *, const char *, void *);
};

static void conf_warning(const char *fmt, ...)
	__attribute__ ((format (printf, 1, 2)));

static void conf_message(const char *fmt, ...)
	__attribute__ ((format (printf, 1, 2)));

static const char *conf_filename;
static int conf_lineno, conf_warnings, conf_unsaved;

const char conf_defname[] = "arch/$ARCH/defconfig";

static void conf_warning(const char *fmt, ...)
{
	va_list ap;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
	conf_warnings++;
}

static void conf_default_message_callback(const char *fmt, va_list ap)
{
	printf("#\n# ");
	vprintf(fmt, ap);
	printf("\n#\n");
}

static void (*conf_message_callback) (const char *fmt, va_list ap) =
	conf_default_message_callback;
void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
{
	conf_message_callback = fn;
}

static void conf_message(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	if (conf_message_callback)
		conf_message_callback(fmt, ap);
	va_end(ap);
}

const char *conf_get_configname(void)
{
	char *name = getenv("KCONFIG_CONFIG");

	return name ? name : ".config";
}

const char *conf_get_autoconfig_name(void)
{
	char *name = getenv("KCONFIG_AUTOCONFIG");

	return name ? name : "include/config/auto.conf";
}

static char *conf_expand_value(const char *in)
{
	struct symbol *sym;
	const char *src;
	static char res_value[SYMBOL_MAXLENGTH];
	char *dst, name[SYMBOL_MAXLENGTH];

	res_value[0] = 0;
	dst = name;
	while ((src = strchr(in, '$'))) {
		strncat(res_value, in, src - in);
		src++;
		dst = name;
		while (isalnum(*src) || *src == '_')
			*dst++ = *src++;
		*dst = 0;
		sym = sym_lookup(name, 0);
		sym_calc_value(sym);
		strcat(res_value, sym_get_string_value(sym));
		in = src;
	}
	strcat(res_value, in);

	return res_value;
}

char *conf_get_default_confname(void)
{
	struct stat buf;
	static char fullname[PATH_MAX+1];
	char *env, *name;

	name = conf_expand_value(conf_defname);
	env = getenv(SRCTREE);
	if (env) {
		sprintf(fullname, "%s/%s", env, name);
		if (!stat(fullname, &buf))
			return fullname;
	}
	return name;
}

static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
{
	char *p2;

	switch (sym->type) {
	case S_TRISTATE:
		if (p[0] == 'm') {
			sym->def[def].tri = mod;
			sym->flags |= def_flags;
			break;
		}
		/* fall through */
	case S_BOOLEAN:
		if (p[0] == 'y') {
			sym->def[def].tri = yes;
			sym->flags |= def_flags;
			break;
		}
		if (p[0] == 'n') {
			sym->def[def].tri = no;
			sym->flags |= def_flags;
			break;
		}
		if (def != S_DEF_AUTO)
			conf_warning("symbol value '%s' invalid for %s",
				     p, sym->name);
		return 1;
	case S_OTHER:
		if (*p != '"') {
			for (p2 = p; *p2 && !isspace(*p2); p2++)
				;
			sym->type = S_STRING;
			goto done;
		}
		/* fall through */
	case S_STRING:
		if (*p++ != '"')
			break;
		for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
			if (*p2 == '"') {
				*p2 = 0;
				break;
			}
			memmove(p2, p2 + 1, strlen(p2));
		}
		if (!p2) {
			if (def != S_DEF_AUTO)
				conf_warning("invalid string found");
			return 1;
		}
		/* fall through */
	case S_INT:
	case S_HEX:
	done:
		if (sym_string_valid(sym, p)) {
			sym->def[def].val = strdup(p);
			sym->flags |= def_flags;
		} else {
			if (def != S_DEF_AUTO)
				conf_warning("symbol value '%s' invalid for %s",
					     p, sym->name);
			return 1;
		}
		break;
	default:
		;
	}
	return 0;
}

#define LINE_GROWTH 16
static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
{
	char *nline;
	size_t new_size = slen + 1;
	if (new_size > *n) {
		new_size += LINE_GROWTH - 1;
		new_size *= 2;
		nline = realloc(*lineptr, new_size);
		if (!nline)
			return -1;

		*lineptr = nline;
		*n = new_size;
	}

	(*lineptr)[slen] = c;

	return 0;
}

static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
{
	char *line = *lineptr;
	size_t slen = 0;

	for (;;) {
		int c = getc(stream);

		switch (c) {
		case '\n':
			if (add_byte(c, &line, slen, n) < 0)
				goto e_out;
			slen++;
			/* fall through */
		case EOF:
			if (add_byte('\0', &line, slen, n) < 0)
				goto e_out;
			*lineptr = line;
			if (slen == 0)
				return -1;
			return slen;
		default:
			if (add_byte(c, &line, slen, n) < 0)
				goto e_out;
			slen++;
		}
	}

e_out:
	line[slen-1] = '\0';
	*lineptr = line;
	return -1;
}

void conf_reset(int def)
{
	struct symbol *sym;
	int i, def_flags;

	def_flags = SYMBOL_DEF << def;
	for_all_symbols(i, sym) {
		sym->flags |= SYMBOL_CHANGED;
		sym->flags &= ~(def_flags|SYMBOL_VALID);
		if (sym_is_choice(sym))
			sym->flags |= def_flags;
		switch (sym->type) {
		case S_INT:
		case S_HEX:
		case S_STRING:
			if (sym->def[def].val)
				free(sym->def[def].val);
			/* fall through */
		default:
			sym->def[def].val = NULL;
			sym->def[def].tri = no;
		}
	}
}

int conf_read_simple(const char *name, int def)
{
	FILE *in = NULL;
	char   *line = NULL;
	size_t  line_asize = 0;
	char *p, *p2;
	struct symbol *sym;
	int def_flags;

	if (name) {
		in = zconf_fopen(name);
	} else {
		struct property *prop;

		name = conf_get_configname();
		in = zconf_fopen(name);
		if (in)
			goto load;
		sym_add_change_count(1);
		if (!sym_defconfig_list)
			return 1;

		for_all_defaults(sym_defconfig_list, prop) {
			if (expr_calc_value(prop->visible.expr) == no ||
			    prop->expr->type != E_SYMBOL)
				continue;
			name = conf_expand_value(prop->expr->left.sym->name);
			in = zconf_fopen(name);
			if (in) {
				conf_message(_("using defaults found in %s"),
					 name);
				goto load;
			}
		}
	}
	if (!in)
		return 1;

load:
	conf_filename = name;
	conf_lineno = 0;
	conf_warnings = 0;
	conf_unsaved = 0;

	def_flags = SYMBOL_DEF << def;
	conf_reset(def);

	while (compat_getline(&line, &line_asize, in) != -1) {
		conf_lineno++;
		sym = NULL;
		if (line[0] == '#') {
			if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
				continue;
			p = strchr(line + 2 + strlen(CONFIG_), ' ');
			if (!p)
				continue;
			*p++ = 0;
			if (strncmp(p, "is not set", 10))
				continue;
			if (def == S_DEF_USER) {
				sym = sym_find(line + 2 + strlen(CONFIG_));
				if (!sym) {
					sym_add_change_count(1);
					goto setsym;
				}
			} else {
				sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
				if (sym->type == S_UNKNOWN)
					sym->type = S_BOOLEAN;
			}
			switch (sym->type) {
			case S_BOOLEAN:
			case S_TRISTATE:
				sym->def[def].tri = no;
				sym->flags |= def_flags;
				break;
			default:
				;
			}
		} else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
			p = strchr(line + strlen(CONFIG_), '=');
			if (!p)
				continue;
			*p++ = 0;
			p2 = strchr(p, '\n');
			if (p2) {
				*p2-- = 0;
				if (*p2 == '\r')
					*p2 = 0;
			}
			if (def == S_DEF_USER) {
				sym = sym_find(line + strlen(CONFIG_));
				if (!sym) {
					sym_add_change_count(1);
					goto setsym;
				}
			} else {
				sym = sym_lookup(line + strlen(CONFIG_), 0);
				if (sym->type == S_UNKNOWN)
					sym->type = S_OTHER;
			}
			if (conf_set_sym_val(sym, def, def_flags, p))
				continue;
		} else {
			if (line[0] != '\r' && line[0] != '\n')
				conf_warning("unexpected data: %.*s",
					     (int)strcspn(line, "\r\n"), line);

			continue;
		}
setsym:
		if (sym && sym_is_choice_value(sym)) {
			struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
			switch (sym->def[def].tri) {
			case no:
				break;
			case mod:
				if (cs->def[def].tri == yes) {
					conf_warning("%s creates inconsistent choice state", sym->name);
					cs->flags &= ~def_flags;
				}
				break;
			case yes:
				if (cs->def[def].tri != no)
					conf_warning("override: %s changes choice state", sym->name);
				cs->def[def].val = sym;
				break;
			}
			cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
		}
	}
	free(line);
	fclose(in);
	return 0;
}

int conf_read(const char *name)
{
	struct symbol *sym;
	int i;

	sym_set_change_count(0);

	if (conf_read_simple(name, S_DEF_USER)) {
		sym_calc_value(modules_sym);
		return 1;
	}

	sym_calc_value(modules_sym);

	for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
			continue;
		if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
			/* check that calculated value agrees with saved value */
			switch (sym->type) {
			case S_BOOLEAN:
			case S_TRISTATE:
				if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
					break;
				if (!sym_is_choice(sym))
					continue;
				/* fall through */
			default:
				if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
					continue;
				break;
			}
		} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
			/* no previous value and not saved */
			continue;
		conf_unsaved++;
		/* maybe print value in verbose mode... */
	}

	for_all_symbols(i, sym) {
		if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
			/* Reset values of generates values, so they'll appear
			 * as new, if they should become visible, but that
			 * doesn't quite work if the Kconfig and the saved
			 * configuration disagree.
			 */
			if (sym->visible == no && !conf_unsaved)
				sym->flags &= ~SYMBOL_DEF_USER;
			switch (sym->type) {
			case S_STRING:
			case S_INT:
			case S_HEX:
				/* Reset a string value if it's out of range */
				if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
					break;
				sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
				conf_unsaved++;
				break;
			default:
				break;
			}
		}
	}

	sym_add_change_count(conf_warnings || conf_unsaved);

	return 0;
}

/*
 * Kconfig configuration printer
 *
 * This printer is used when generating the resulting configuration after
 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 * passing a non-NULL argument to the printer.
 *
 */
static void
kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
{

	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
		if (*value == 'n') {
			bool skip_unset = (arg != NULL);

			if (!skip_unset)
				fprintf(fp, "# %s%s is not set\n",
				    CONFIG_, sym->name);
			return;
		}
		break;
	default:
		break;
	}

	fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
}

static void
kconfig_print_comment(FILE *fp, const char *value, void *arg)
{
	const char *p = value;
	size_t l;

	for (;;) {
		l = strcspn(p, "\n");
		fprintf(fp, "#");
		if (l) {
			fprintf(fp, " ");
			xfwrite(p, l, 1, fp);
			p += l;
		}
		fprintf(fp, "\n");
		if (*p++ == '\0')
			break;
	}
}

static struct conf_printer kconfig_printer_cb =
{
	.print_symbol = kconfig_print_symbol,
	.print_comment = kconfig_print_comment,
};

/*
 * Header printer
 *
 * This printer is used when generating the `include/generated/autoconf.h' file.
 */
static void
header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
{

	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE: {
		const char *suffix = "";

		switch (*value) {
		case 'n':
			break;
		case 'm':
			suffix = "_MODULE";
			/* fall through */
		default:
			fprintf(fp, "#define %s%s%s 1\n",
			    CONFIG_, sym->name, suffix);
		}
		break;
	}
	case S_HEX: {
		const char *prefix = "";

		if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
			prefix = "0x";
		fprintf(fp, "#define %s%s %s%s\n",
		    CONFIG_, sym->name, prefix, value);
		break;
	}
	case S_STRING:
	case S_INT:
		fprintf(fp, "#define %s%s %s\n",
		    CONFIG_, sym->name, value);
		break;
	default:
		break;
	}

}

static void
header_print_comment(FILE *fp, const char *value, void *arg)
{
	const char *p = value;
	size_t l;

	fprintf(fp, "/*\n");
	for (;;) {
		l = strcspn(p, "\n");
		fprintf(fp, " *");
		if (l) {
			fprintf(fp, " ");
			xfwrite(p, l, 1, fp);
			p += l;
		}
		fprintf(fp, "\n");
		if (*p++ == '\0')
			break;
	}
	fprintf(fp, " */\n");
}

static struct conf_printer header_printer_cb =
{
	.print_symbol = header_print_symbol,
	.print_comment = header_print_comment,
};

/*
 * Tristate printer
 *
 * This printer is used when generating the `include/config/tristate.conf' file.
 */
static void
tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
{

	if (sym->type == S_TRISTATE && *value != 'n')
		fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
}

static struct conf_printer tristate_printer_cb =
{
	.print_symbol = tristate_print_symbol,
	.print_comment = kconfig_print_comment,
};

static void conf_write_symbol(FILE *fp, struct symbol *sym,
			      struct conf_printer *printer, void *printer_arg)
{
	const char *str;

	switch (sym->type) {
	case S_OTHER:
	case S_UNKNOWN:
		break;
	case S_STRING:
		str = sym_get_string_value(sym);
		str = sym_escape_string_value(str);
		printer->print_symbol(fp, sym, str, printer_arg);
		free((void *)str);
		break;
	default:
		str = sym_get_string_value(sym);
		printer->print_symbol(fp, sym, str, printer_arg);
	}
}

static void
conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
{
	char buf[256];

	snprintf(buf, sizeof(buf),
	    "\n"
	    "Automatically generated file; DO NOT EDIT.\n"
	    "%s\n",
	    rootmenu.prompt->text);

	printer->print_comment(fp, buf, printer_arg);
}

/*
 * Write out a minimal config.
 * All values that has default values are skipped as this is redundant.
 */
int conf_write_defconfig(const char *filename)
{
	struct symbol *sym;
	struct menu *menu;
	FILE *out;

	out = fopen(filename, "w");
	if (!out)
		return 1;

	sym_clear_all_valid();

	/* Traverse all menus to find all relevant symbols */
	menu = rootmenu.list;

	while (menu != NULL)
	{
		sym = menu->sym;
		if (sym == NULL) {
			if (!menu_is_visible(menu))
				goto next_menu;
		} else if (!sym_is_choice(sym)) {
			sym_calc_value(sym);
			if (!(sym->flags & SYMBOL_WRITE))
				goto next_menu;
			sym->flags &= ~SYMBOL_WRITE;
			/* If we cannot change the symbol - skip */
			if (!sym_is_changable(sym))
				goto next_menu;
			/* If symbol equals to default value - skip */
			if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
				goto next_menu;

			/*
			 * If symbol is a choice value and equals to the
			 * default for a choice - skip.
			 * But only if value is bool and equal to "y" and
			 * choice is not "optional".
			 * (If choice is "optional" then all values can be "n")
			 */
			if (sym_is_choice_value(sym)) {
				struct symbol *cs;
				struct symbol *ds;

				cs = prop_get_symbol(sym_get_choice_prop(sym));
				ds = sym_choice_default(cs);
				if (!sym_is_optional(cs) && sym == ds) {
					if ((sym->type == S_BOOLEAN) &&
					    sym_get_tristate_value(sym) == yes)
						goto next_menu;
				}
			}
			conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
		}
next_menu:
		if (menu->list != NULL) {
			menu = menu->list;
		}
		else if (menu->next != NULL) {
			menu = menu->next;
		} else {
			while ((menu = menu->parent)) {
				if (menu->next != NULL) {
					menu = menu->next;
					break;
				}
			}
		}
	}
	fclose(out);
	return 0;
}

int conf_write(const char *name)
{
	FILE *out;
	struct symbol *sym;
	struct menu *menu;
	const char *basename;
	const char *str;
	char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
	char *env;

	dirname[0] = 0;
	if (name && name[0]) {
		struct stat st;
		char *slash;

		if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
			strcpy(dirname, name);
			strcat(dirname, "/");
			basename = conf_get_configname();
		} else if ((slash = strrchr(name, '/'))) {
			int size = slash - name + 1;
			memcpy(dirname, name, size);
			dirname[size] = 0;
			if (slash[1])
				basename = slash + 1;
			else
				basename = conf_get_configname();
		} else
			basename = name;
	} else
		basename = conf_get_configname();

	sprintf(newname, "%s%s", dirname, basename);
	env = getenv("KCONFIG_OVERWRITECONFIG");
	if (!env || !*env) {
		sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
		out = fopen(tmpname, "w");
	} else {
		*tmpname = 0;
		out = fopen(newname, "w");
	}
	if (!out)
		return 1;

	conf_write_heading(out, &kconfig_printer_cb, NULL);

	if (!conf_get_changed())
		sym_clear_all_valid();

	menu = rootmenu.list;
	while (menu) {
		sym = menu->sym;
		if (!sym) {
			if (!menu_is_visible(menu))
				goto next;
			str = menu_get_prompt(menu);
			fprintf(out, "\n"
				     "#\n"
				     "# %s\n"
				     "#\n", str);
		} else if (!(sym->flags & SYMBOL_CHOICE)) {
			sym_calc_value(sym);
			if (!(sym->flags & SYMBOL_WRITE))
				goto next;
			sym->flags &= ~SYMBOL_WRITE;

			conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
		}

next:
		if (menu->list) {
			menu = menu->list;
			continue;
		}
		if (menu->next)
			menu = menu->next;
		else while ((menu = menu->parent)) {
			if (menu->next) {
				menu = menu->next;
				break;
			}
		}
	}
	fclose(out);

	if (*tmpname) {
		strcat(dirname, basename);
		strcat(dirname, ".old");
		rename(newname, dirname);
		if (rename(tmpname, newname))
			return 1;
	}

	conf_message(_("configuration written to %s"), newname);

	sym_set_change_count(0);

	return 0;
}

static int conf_split_config(void)
{
	const char *name;
	char path[PATH_MAX+1];
	char *s, *d, c;
	struct symbol *sym;
	struct stat sb;
	int res, i, fd;

	name = conf_get_autoconfig_name();
	conf_read_simple(name, S_DEF_AUTO);
	sym_calc_value(modules_sym);

	if (chdir("include/config"))
		return 1;

	res = 0;
	for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if ((sym->flags & SYMBOL_AUTO) || !sym->name)
			continue;
		if (sym->flags & SYMBOL_WRITE) {
			if (sym->flags & SYMBOL_DEF_AUTO) {
				/*
				 * symbol has old and new value,
				 * so compare them...
				 */
				switch (sym->type) {
				case S_BOOLEAN:
				case S_TRISTATE:
					if (sym_get_tristate_value(sym) ==
					    sym->def[S_DEF_AUTO].tri)
						continue;
					break;
				case S_STRING:
				case S_HEX:
				case S_INT:
					if (!strcmp(sym_get_string_value(sym),
						    sym->def[S_DEF_AUTO].val))
						continue;
					break;
				default:
					break;
				}
			} else {
				/*
				 * If there is no old value, only 'no' (unset)
				 * is allowed as new value.
				 */
				switch (sym->type) {
				case S_BOOLEAN:
				case S_TRISTATE:
					if (sym_get_tristate_value(sym) == no)
						continue;
					break;
				default:
					break;
				}
			}
		} else if (!(sym->flags & SYMBOL_DEF_AUTO))
			/* There is neither an old nor a new value. */
			continue;
		/* else
		 *	There is an old value, but no new value ('no' (unset)
		 *	isn't saved in auto.conf, so the old value is always
		 *	different from 'no').
		 */

		/* Replace all '_' and append ".h" */
		s = sym->name;
		d = path;
		while ((c = *s++)) {
			c = tolower(c);
			*d++ = (c == '_') ? '/' : c;
		}
		strcpy(d, ".h");

		/* Assume directory path already exists. */
		fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
		if (fd == -1) {
			if (errno != ENOENT) {
				res = 1;
				break;
			}
			/*
			 * Create directory components,
			 * unless they exist already.
			 */
			d = path;
			while ((d = strchr(d, '/'))) {
				*d = 0;
				if (stat(path, &sb) && mkdir(path, 0755)) {
					res = 1;
					goto out;
				}
				*d++ = '/';
			}
			/* Try it again. */
			fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
			if (fd == -1) {
				res = 1;
				break;
			}
		}
		close(fd);
	}
out:
	if (chdir("../.."))
		return 1;

	return res;
}

int conf_write_autoconf(void)
{
	struct symbol *sym;
	const char *name;
	FILE *out, *tristate, *out_h;
	int i;

	sym_clear_all_valid();

	file_write_dep("include/config/auto.conf.cmd");

	if (conf_split_config())
		return 1;

	out = fopen(".tmpconfig", "w");
	if (!out)
		return 1;

	tristate = fopen(".tmpconfig_tristate", "w");
	if (!tristate) {
		fclose(out);
		return 1;
	}

	out_h = fopen(".tmpconfig.h", "w");
	if (!out_h) {
		fclose(out);
		fclose(tristate);
		return 1;
	}

	conf_write_heading(out, &kconfig_printer_cb, NULL);

	conf_write_heading(tristate, &tristate_printer_cb, NULL);

	conf_write_heading(out_h, &header_printer_cb, NULL);

	for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
			continue;

		/* write symbol to auto.conf, tristate and header files */
		conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);

		conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);

		conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
	}
	fclose(out);
	fclose(tristate);
	fclose(out_h);

	name = getenv("KCONFIG_AUTOHEADER");
	if (!name)
		name = "include/generated/autoconf.h";
	if (rename(".tmpconfig.h", name))
		return 1;
	name = getenv("KCONFIG_TRISTATE");
	if (!name)
		name = "include/config/tristate.conf";
	if (rename(".tmpconfig_tristate", name))
		return 1;
	name = conf_get_autoconfig_name();
	/*
	 * This must be the last step, kbuild has a dependency on auto.conf
	 * and this marks the successful completion of the previous steps.
	 */
	if (rename(".tmpconfig", name))
		return 1;

	return 0;
}

static int sym_change_count;
static void (*conf_changed_callback)(void);

void sym_set_change_count(int count)
{
	int _sym_change_count = sym_change_count;
	sym_change_count = count;
	if (conf_changed_callback &&
	    (bool)_sym_change_count != (bool)count)
		conf_changed_callback();
}

void sym_add_change_count(int count)
{
	sym_set_change_count(count + sym_change_count);
}

bool conf_get_changed(void)
{
	return sym_change_count;
}

void conf_set_changed_callback(void (*fn)(void))
{
	conf_changed_callback = fn;
}

static bool randomize_choice_values(struct symbol *csym)
{
	struct property *prop;
	struct symbol *sym;
	struct expr *e;
	int cnt, def;

	/*
	 * If choice is mod then we may have more items selected
	 * and if no then no-one.
	 * In both cases stop.
	 */
	if (csym->curr.tri != yes)
		return false;

	prop = sym_get_choice_prop(csym);

	/* count entries in choice block */
	cnt = 0;
	expr_list_for_each_sym(prop->expr, e, sym)
		cnt++;

	/*
	 * find a random value and set it to yes,
	 * set the rest to no so we have only one set
	 */
	def = (rand() % cnt);

	cnt = 0;
	expr_list_for_each_sym(prop->expr, e, sym) {
		if (def == cnt++) {
			sym->def[S_DEF_USER].tri = yes;
			csym->def[S_DEF_USER].val = sym;
		}
		else {
			sym->def[S_DEF_USER].tri = no;
		}
		sym->flags |= SYMBOL_DEF_USER;
		/* clear VALID to get value calculated */
		sym->flags &= ~SYMBOL_VALID;
	}
	csym->flags |= SYMBOL_DEF_USER;
	/* clear VALID to get value calculated */
	csym->flags &= ~(SYMBOL_VALID);

	return true;
}

void set_all_choice_values(struct symbol *csym)
{
	struct property *prop;
	struct symbol *sym;
	struct expr *e;

	prop = sym_get_choice_prop(csym);

	/*
	 * Set all non-assinged choice values to no
	 */
	expr_list_for_each_sym(prop->expr, e, sym) {
		if (!sym_has_value(sym))
			sym->def[S_DEF_USER].tri = no;
	}
	csym->flags |= SYMBOL_DEF_USER;
	/* clear VALID to get value calculated */
	csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
}

bool conf_set_all_new_symbols(enum conf_def_mode mode)
{
	struct symbol *sym, *csym;
	int i, cnt, pby, pty, ptm;	/* pby: probability of boolean  = y
					 * pty: probability of tristate = y
					 * ptm: probability of tristate = m
					 */

	pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
				   * below, otherwise gcc whines about
				   * -Wmaybe-uninitialized */
	if (mode == def_random) {
		int n, p[3];
		char *env = getenv("KCONFIG_PROBABILITY");
		n = 0;
		while( env && *env ) {
			char *endp;
			int tmp = strtol( env, &endp, 10 );
			if( tmp >= 0 && tmp <= 100 ) {
				p[n++] = tmp;
			} else {
				errno = ERANGE;
				perror( "KCONFIG_PROBABILITY" );
				exit( 1 );
			}
			env = (*endp == ':') ? endp+1 : endp;
			if( n >=3 ) {
				break;
			}
		}
		switch( n ) {
		case 1:
			pby = p[0]; ptm = pby/2; pty = pby-ptm;
			break;
		case 2:
			pty = p[0]; ptm = p[1]; pby = pty + ptm;
			break;
		case 3:
			pby = p[0]; pty = p[1]; ptm = p[2];
			break;
		}

		if( pty+ptm > 100 ) {
			errno = ERANGE;
			perror( "KCONFIG_PROBABILITY" );
			exit( 1 );
		}
	}
	bool has_changed = false;

	sym_clear_all_valid();

	for_all_symbols(i, sym) {
		if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
			continue;
		switch (sym_get_type(sym)) {
		case S_BOOLEAN:
		case S_TRISTATE:
			has_changed = true;
			switch (mode) {
			case def_yes:
				sym->def[S_DEF_USER].tri = yes;
				break;
			case def_mod:
				sym->def[S_DEF_USER].tri = mod;
				break;
			case def_no:
				if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
					sym->def[S_DEF_USER].tri = yes;
				else
					sym->def[S_DEF_USER].tri = no;
				break;
			case def_random:
				sym->def[S_DEF_USER].tri = no;
				cnt = rand() % 100;
				if (sym->type == S_TRISTATE) {
					if (cnt < pty)
						sym->def[S_DEF_USER].tri = yes;
					else if (cnt < (pty+ptm))
						sym->def[S_DEF_USER].tri = mod;
				} else if (cnt < pby)
					sym->def[S_DEF_USER].tri = yes;
				break;
			default:
				continue;
			}
			if (!(sym_is_choice(sym) && mode == def_random))
				sym->flags |= SYMBOL_DEF_USER;
			break;
		default:
			break;
		}

	}

	/*
	 * We have different type of choice blocks.
	 * If curr.tri equals to mod then we can select several
	 * choice symbols in one block.
	 * In this case we do nothing.
	 * If curr.tri equals yes then only one symbol can be
	 * selected in a choice block and we set it to yes,
	 * and the rest to no.
	 */
	if (mode != def_random) {
		for_all_symbols(i, csym) {
			if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
			    sym_is_choice_value(csym))
				csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
		}
	}

	for_all_symbols(i, csym) {
		if (sym_has_value(csym) || !sym_is_choice(csym))
			continue;

		sym_calc_value(csym);
		if (mode == def_random)
			has_changed = randomize_choice_values(csym);
		else {
			set_all_choice_values(csym);
			has_changed = true;
		}
	}

	return has_changed;
}