/*

  * 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;

 }