/*
* Copyright (C) 2002-2005 Roman Zippel <[email protected]>
* Copyright (C) 2002-2005 Sam Ravnborg <[email protected]>
*
* Released under the terms of the GNU GPL v2.0.
*/

#include <stdarg.h>
#include <stdlib.h>
#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;
}