/*
 * 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;

    for (file = file_list; file; file = file->next) {
        if (!strcmp(name, file->name))
            return file;
    }

    file = malloc(sizeof (*file));
    memset(file, 0, sizeof (*file));
    file->name = strdup(name);
    file->next = file_list;
    file_list = file;
    return file;
}

static char *br2_symbol_printer(const char *const in)
{
    ssize_t i, j, len = strlen(in);

    char *ret;

    if (len < 1)
        return NULL;
    ret = malloc(len + 1);
    if (!ret) {
        printf("Out of memory!");
        exit(1);
    }
    memset(ret, 0, len + 1);
    i = j = 0;
    if (strncmp("BR2_", in, 4) == 0)
        i += 4;
    if (strncmp("PACKAGE_", in + i, 8) == 0)
        i += 8;
    else if (strncmp("TARGET_", in + i, 7) == 0)
        i += 7;
    while (i <= len)
        ret[j++] = tolower(in[i++]);
    return ret;
}

/* write dependencies of the infividual config-symbols */
static int write_make_deps(const char *name)
{
    struct menu *menu;

    struct symbol *sym;

    struct property *prop, *p;

    unsigned done;

    const char *const name_tmp = "..make.deps.tmp";

    FILE *out;

    if (!name)
        name = ".auto.deps";
    out = fopen(name_tmp, "w");
    if (!out)
        return 1;
    fprintf(out,
            "# ATTENTION! This does not handle 'depends', just 'select'! \n"
            "# See package/config/util.c write_make_deps()\n#\n");
    menu = &rootmenu;           //rootmenu.list;
    while (menu) {
        sym = menu->sym;
        if (!sym) {
            if (!menu_is_visible(menu))
                goto next;
        } else if (!(sym->flags & SYMBOL_CHOICE)) {
            sym_calc_value(sym);
            if (sym->type == S_BOOLEAN && sym_get_tristate_value(sym) != no) {
                done = 0;
                for_all_prompts(sym, prop) {
                    struct expr *e;

//printf("\nname=%s\n", sym->name);
                    for_all_properties(sym, p, P_SELECT) {
                        e = p->expr;
                        if (e && e->left.sym->name) {
                            if (!done) {
                                fprintf(out, "%s: $(BASE_TARGETS)",
                                        br2_symbol_printer(sym->name));
                                done = 1;
                            }
//printf("SELECTS %s\n",e->left.sym->name);
                            fprintf(out, " %s",
                                    br2_symbol_printer(e->left.sym->name));
                        }
                    }
                    if (done)
                        fprintf(out, "\n");
#if 0
                    e = sym->rev_dep.expr;
                    if (e && e->type == E_SYMBOL && e->left.sym->name) {
                        fprintf(out, "%s: %s",
                                br2_symbol_printer(e->left.sym->name),
                                br2_symbol_printer(sym->name));
                        printf("%s is Selected BY: %s", sym->name,
                               e->left.sym->name);
                    }
#endif
                }
            }
        }
 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);
    rename(name_tmp, name);
    printf(_("#\n"
             "# make dependencies written to %s\n"
             "# See top of this file before playing with this auto-preprequisites!\n"
             "#\n"), name);
    return 0;
}

/* 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 write_make_deps(NULL);
}

/* Allocate initial growable sting */
struct gstr str_new(void)
{
    struct gstr gs;

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