/*

 * Copyright (C) 2002-2005 Roman Zippel <zippel@linux-m68k.org>

 * Copyright (C) 2002-2005 Sam Ravnborg <sam@ravnborg.org>

 *

 * Released under the terms of the GNU GPL v2.0.

 */

#include <string.h>

#include "lkc.h"

/* file already present in list? If not add it */

struct file *file_lookup(const char *name)

{

	struct file *file;

	const char *file_name = sym_expand_string_value(name);

	for (file = file_list; file; file = file->next) {

		if (!strcmp(name, file->name)) {

			free((void *)file_name);

			return file;

		}

	}

	file = malloc(sizeof(*file));

	memset(file, 0, sizeof(*file));

	file->name = file_name;

	file->next = file_list;

	file_list = file;

	return file;

}

/* write a dependency file as used by kbuild to track dependencies */

int file_write_dep(const char *name)

{

	struct symbol *sym, *env_sym;

	struct expr *e;

	struct file *file;

	FILE *out;

	if (!name)

		name = ".kconfig.d";

	out = fopen("..config.tmp", "w");

	if (!out)

		return 1;

	fprintf(out, "deps_config := \\\n");

	for (file = file_list; file; file = file->next) {

		if (file->next)

			fprintf(out, "\t%s \\\n", file->name);

		else

			fprintf(out, "\t%s\n", file->name);

	}

	fprintf(out, "\n%s: \\\n"

		     "\t$(deps_config)\n\n", conf_get_autoconfig_name());

	expr_list_for_each_sym(sym_env_list, e, sym) {

		struct property *prop;

		const char *value;

		prop = sym_get_env_prop(sym);

		env_sym = prop_get_symbol(prop);

		if (!env_sym)

			continue;

		value = getenv(env_sym->name);

		if (!value)

			value = "";

		fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value);

		fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name());

		fprintf(out, "endif\n");

	}

	fprintf(out, "\n$(deps_config): ;\n");

	fclose(out);

	rename("..config.tmp", name);

	return 0;

}

/* Allocate initial growable string */

struct gstr str_new(void)

{

	struct gstr gs;

	gs.s = malloc(sizeof(char) * 64);

	gs.len = 64;

	gs.max_width = 0;

	strcpy(gs.s, "\0");

	return gs;

}

/* Allocate and assign growable string */

struct gstr str_assign(const char *s)

{

	struct gstr gs;

	gs.s = strdup(s);

	gs.len = strlen(s) + 1;

	gs.max_width = 0;

	return gs;

}

/* Free storage for growable string */

void str_free(struct gstr *gs)

{

	if (gs->s)

		free(gs->s);

	gs->s = NULL;

	gs->len = 0;

}

/* Append to growable string */

void str_append(struct gstr *gs, const char *s)

{

	size_t l;

	if (s) {

		l = strlen(gs->s) + strlen(s) + 1;

		if (l > gs->len) {

			gs->s   = realloc(gs->s, l);

			gs->len = l;

		}

		strcat(gs->s, s);

	}

}

/* Append printf formatted string to growable string */

void str_printf(struct gstr *gs, const char *fmt, ...)

{

	va_list ap;

	char s[10000]; /* big enough... */

	va_start(ap, fmt);

	vsnprintf(s, sizeof(s), fmt, ap);

	str_append(gs, s);

	va_end(ap);

}

/* Retrieve value of growable string */

const char *str_get(struct gstr *gs)

{

	return gs->s;

}