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DEFINITIONS
This source file includes following definitions.
- sym_add_default
- sym_init
- sym_get_type
- sym_type_name
- sym_get_choice_prop
- sym_get_env_prop
- sym_get_default_prop
- sym_get_range_prop
- sym_get_range_val
- sym_validate_range
- sym_calc_visibility
- sym_calc_choice
- sym_calc_value
- sym_clear_all_valid
- sym_set_changed
- sym_set_all_changed
- sym_tristate_within_range
- sym_set_tristate_value
- sym_toggle_tristate_value
- sym_string_valid
- sym_string_within_range
- sym_set_string_value
- sym_get_string_value
- sym_is_changable
- sym_lookup
- sym_find
- sym_re_search
- sym_check_expr_deps
- sym_check_sym_deps
- sym_check_choice_deps
- sym_check_deps
- prop_alloc
- prop_get_symbol
- prop_get_type_name
- prop_add_env
/*
* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
* Released under the terms of the GNU GPL v2.0.
*/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <regex.h>
#include <sys/utsname.h>
#define LKC_DIRECT_LINK
#include "lkc.h"
struct symbol symbol_yes = {
.name = "y",
.curr = { "y", yes },
.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_mod = {
.name = "m",
.curr = { "m", mod },
.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_no = {
.name = "n",
.curr = { "n", no },
.flags = SYMBOL_CONST|SYMBOL_VALID,
}, symbol_empty = {
.name = "",
.curr = { "", no },
.flags = SYMBOL_VALID,
};
struct symbol *sym_defconfig_list;
struct symbol *modules_sym;
tristate modules_val;
struct expr *sym_env_list;
void sym_add_default(struct symbol *sym, const char *def)
{
struct property *prop = prop_alloc(P_DEFAULT, sym);
prop->expr = expr_alloc_symbol(sym_lookup(def, SYMBOL_CONST));
}
void sym_init(void)
{
struct symbol *sym;
struct utsname uts;
static bool inited = false;
if (inited)
return;
inited = true;
uname(&uts);
sym = sym_lookup("UNAME_RELEASE", 0);
sym->type = S_STRING;
sym->flags |= SYMBOL_AUTO;
sym_add_default(sym, uts.release);
}
enum symbol_type sym_get_type(struct symbol *sym)
{
enum symbol_type type = sym->type;
if (type == S_TRISTATE) {
if (sym_is_choice_value(sym) && sym->visible == yes)
type = S_BOOLEAN;
else if (modules_val == no)
type = S_BOOLEAN;
}
return type;
}
const char *sym_type_name(enum symbol_type type)
{
switch (type) {
case S_BOOLEAN:
return "boolean";
case S_TRISTATE:
return "tristate";
case S_INT:
return "integer";
case S_HEX:
return "hex";
case S_STRING:
return "string";
case S_UNKNOWN:
return "unknown";
case S_OTHER:
break;
}
return "???";
}
struct property *sym_get_choice_prop(struct symbol *sym)
{
struct property *prop;
for_all_choices(sym, prop)
return prop;
return NULL;
}
struct property *sym_get_env_prop(struct symbol *sym)
{
struct property *prop;
for_all_properties(sym, prop, P_ENV)
return prop;
return NULL;
}
struct property *sym_get_default_prop(struct symbol *sym)
{
struct property *prop;
for_all_defaults(sym, prop) {
prop->visible.tri = expr_calc_value(prop->visible.expr);
if (prop->visible.tri != no)
return prop;
}
return NULL;
}
struct property *sym_get_range_prop(struct symbol *sym)
{
struct property *prop;
for_all_properties(sym, prop, P_RANGE) {
prop->visible.tri = expr_calc_value(prop->visible.expr);
if (prop->visible.tri != no)
return prop;
}
return NULL;
}
static int sym_get_range_val(struct symbol *sym, int base)
{
sym_calc_value(sym);
switch (sym->type) {
case S_INT:
base = 10;
break;
case S_HEX:
base = 16;
break;
default:
break;
}
return strtol(sym->curr.val, NULL, base);
}
static void sym_validate_range(struct symbol *sym)
{
struct property *prop;
int base, val, val2;
char str[64];
switch (sym->type) {
case S_INT:
base = 10;
break;
case S_HEX:
base = 16;
break;
default:
return;
}
prop = sym_get_range_prop(sym);
if (!prop)
return;
val = strtol(sym->curr.val, NULL, base);
val2 = sym_get_range_val(prop->expr->left.sym, base);
if (val >= val2) {
val2 = sym_get_range_val(prop->expr->right.sym, base);
if (val <= val2)
return;
}
if (sym->type == S_INT)
sprintf(str, "%d", val2);
else
sprintf(str, "0x%x", val2);
sym->curr.val = strdup(str);
}
static void sym_calc_visibility(struct symbol *sym)
{
struct property *prop;
tristate tri;
/* any prompt visible? */
tri = no;
for_all_prompts(sym, prop) {
prop->visible.tri = expr_calc_value(prop->visible.expr);
tri = EXPR_OR(tri, prop->visible.tri);
}
if (tri == mod && (sym->type != S_TRISTATE || modules_val == no))
tri = yes;
if (sym->visible != tri) {
sym->visible = tri;
sym_set_changed(sym);
}
if (sym_is_choice_value(sym))
return;
tri = no;
if (sym->rev_dep.expr)
tri = expr_calc_value(sym->rev_dep.expr);
if (tri == mod && sym_get_type(sym) == S_BOOLEAN)
tri = yes;
if (sym->rev_dep.tri != tri) {
sym->rev_dep.tri = tri;
sym_set_changed(sym);
}
}
static struct symbol *sym_calc_choice(struct symbol *sym)
{
struct symbol *def_sym;
struct property *prop;
struct expr *e;
/* is the user choice visible? */
def_sym = sym->def[S_DEF_USER].val;
if (def_sym) {
sym_calc_visibility(def_sym);
if (def_sym->visible != no)
return def_sym;
}
/* any of the defaults visible? */
for_all_defaults(sym, prop) {
prop->visible.tri = expr_calc_value(prop->visible.expr);
if (prop->visible.tri == no)
continue;
def_sym = prop_get_symbol(prop);
sym_calc_visibility(def_sym);
if (def_sym->visible != no)
return def_sym;
}
/* just get the first visible value */
prop = sym_get_choice_prop(sym);
expr_list_for_each_sym(prop->expr, e, def_sym) {
sym_calc_visibility(def_sym);
if (def_sym->visible != no)
return def_sym;
}
/* no choice? reset tristate value */
sym->curr.tri = no;
return NULL;
}
void sym_calc_value(struct symbol *sym)
{
struct symbol_value newval, oldval;
struct property *prop;
struct expr *e;
if (!sym)
return;
if (sym->flags & SYMBOL_VALID)
return;
sym->flags |= SYMBOL_VALID;
oldval = sym->curr;
switch (sym->type) {
case S_INT:
case S_HEX:
case S_STRING:
newval = symbol_empty.curr;
break;
case S_BOOLEAN:
case S_TRISTATE:
newval = symbol_no.curr;
break;
default:
sym->curr.val = sym->name;
sym->curr.tri = no;
return;
}
if (!sym_is_choice_value(sym))
sym->flags &= ~SYMBOL_WRITE;
sym_calc_visibility(sym);
/* set default if recursively called */
sym->curr = newval;
switch (sym_get_type(sym)) {
case S_BOOLEAN:
case S_TRISTATE:
if (sym_is_choice_value(sym) && sym->visible == yes) {
prop = sym_get_choice_prop(sym);
newval.tri = (prop_get_symbol(prop)->curr.val == sym) ? yes : no;
} else {
if (sym->visible != no) {
/* if the symbol is visible use the user value
* if available, otherwise try the default value
*/
sym->flags |= SYMBOL_WRITE;
if (sym_has_value(sym)) {
newval.tri = EXPR_AND(sym->def[S_DEF_USER].tri,
sym->visible);
goto calc_newval;
}
}
if (sym->rev_dep.tri != no)
sym->flags |= SYMBOL_WRITE;
if (!sym_is_choice(sym)) {
prop = sym_get_default_prop(sym);
if (prop) {
sym->flags |= SYMBOL_WRITE;
newval.tri = EXPR_AND(expr_calc_value(prop->expr),
prop->visible.tri);
}
}
calc_newval:
newval.tri = EXPR_OR(newval.tri, sym->rev_dep.tri);
}
if (newval.tri == mod && sym_get_type(sym) == S_BOOLEAN)
newval.tri = yes;
break;
case S_STRING:
case S_HEX:
case S_INT:
if (sym->visible != no) {
sym->flags |= SYMBOL_WRITE;
if (sym_has_value(sym)) {
newval.val = sym->def[S_DEF_USER].val;
break;
}
}
prop = sym_get_default_prop(sym);
if (prop) {
struct symbol *ds = prop_get_symbol(prop);
if (ds) {
sym->flags |= SYMBOL_WRITE;
sym_calc_value(ds);
newval.val = ds->curr.val;
}
}
break;
default:
;
}
sym->curr = newval;
if (sym_is_choice(sym) && newval.tri == yes)
sym->curr.val = sym_calc_choice(sym);
sym_validate_range(sym);
if (memcmp(&oldval, &sym->curr, sizeof(oldval))) {
sym_set_changed(sym);
if (modules_sym == sym) {
sym_set_all_changed();
modules_val = modules_sym->curr.tri;
}
}
if (sym_is_choice(sym)) {
struct symbol *choice_sym;
int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE);
prop = sym_get_choice_prop(sym);
expr_list_for_each_sym(prop->expr, e, choice_sym) {
choice_sym->flags |= flags;
if (flags & SYMBOL_CHANGED)
sym_set_changed(choice_sym);
}
}
if (sym->flags & SYMBOL_AUTO)
sym->flags &= ~SYMBOL_WRITE;
}
void sym_clear_all_valid(void)
{
struct symbol *sym;
int i;
for_all_symbols(i, sym)
sym->flags &= ~SYMBOL_VALID;
sym_add_change_count(1);
if (modules_sym)
sym_calc_value(modules_sym);
}
void sym_set_changed(struct symbol *sym)
{
struct property *prop;
sym->flags |= SYMBOL_CHANGED;
for (prop = sym->prop; prop; prop = prop->next) {
if (prop->menu)
prop->menu->flags |= MENU_CHANGED;
}
}
void sym_set_all_changed(void)
{
struct symbol *sym;
int i;
for_all_symbols(i, sym)
sym_set_changed(sym);
}
bool sym_tristate_within_range(struct symbol *sym, tristate val)
{
int type = sym_get_type(sym);
if (sym->visible == no)
return false;
if (type != S_BOOLEAN && type != S_TRISTATE)
return false;
if (type == S_BOOLEAN && val == mod)
return false;
if (sym->visible <= sym->rev_dep.tri)
return false;
if (sym_is_choice_value(sym) && sym->visible == yes)
return val == yes;
return val >= sym->rev_dep.tri && val <= sym->visible;
}
bool sym_set_tristate_value(struct symbol *sym, tristate val)
{
tristate oldval = sym_get_tristate_value(sym);
if (oldval != val && !sym_tristate_within_range(sym, val))
return false;
if (!(sym->flags & SYMBOL_DEF_USER)) {
sym->flags |= SYMBOL_DEF_USER;
sym_set_changed(sym);
}
/*
* setting a choice value also resets the new flag of the choice
* symbol and all other choice values.
*/
if (sym_is_choice_value(sym) && val == yes) {
struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
struct property *prop;
struct expr *e;
cs->def[S_DEF_USER].val = sym;
cs->flags |= SYMBOL_DEF_USER;
prop = sym_get_choice_prop(cs);
for (e = prop->expr; e; e = e->left.expr) {
if (e->right.sym->visible != no)
e->right.sym->flags |= SYMBOL_DEF_USER;
}
}
sym->def[S_DEF_USER].tri = val;
if (oldval != val)
sym_clear_all_valid();
return true;
}
tristate sym_toggle_tristate_value(struct symbol *sym)
{
tristate oldval, newval;
oldval = newval = sym_get_tristate_value(sym);
do {
switch (newval) {
case no:
newval = mod;
break;
case mod:
newval = yes;
break;
case yes:
newval = no;
break;
}
if (sym_set_tristate_value(sym, newval))
break;
} while (oldval != newval);
return newval;
}
bool sym_string_valid(struct symbol *sym, const char *str)
{
signed char ch;
switch (sym->type) {
case S_STRING:
return true;
case S_INT:
ch = *str++;
if (ch == '-')
ch = *str++;
if (!isdigit(ch))
return false;
if (ch == '0' && *str != 0)
return false;
while ((ch = *str++)) {
if (!isdigit(ch))
return false;
}
return true;
case S_HEX:
if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X'))
str += 2;
ch = *str++;
do {
if (!isxdigit(ch))
return false;
} while ((ch = *str++));
return true;
case S_BOOLEAN:
case S_TRISTATE:
switch (str[0]) {
case 'y': case 'Y':
case 'm': case 'M':
case 'n': case 'N':
return true;
}
return false;
default:
return false;
}
}
bool sym_string_within_range(struct symbol *sym, const char *str)
{
struct property *prop;
int val;
switch (sym->type) {
case S_STRING:
return sym_string_valid(sym, str);
case S_INT:
if (!sym_string_valid(sym, str))
return false;
prop = sym_get_range_prop(sym);
if (!prop)
return true;
val = strtol(str, NULL, 10);
return val >= sym_get_range_val(prop->expr->left.sym, 10) &&
val <= sym_get_range_val(prop->expr->right.sym, 10);
case S_HEX:
if (!sym_string_valid(sym, str))
return false;
prop = sym_get_range_prop(sym);
if (!prop)
return true;
val = strtol(str, NULL, 16);
return val >= sym_get_range_val(prop->expr->left.sym, 16) &&
val <= sym_get_range_val(prop->expr->right.sym, 16);
case S_BOOLEAN:
case S_TRISTATE:
switch (str[0]) {
case 'y': case 'Y':
return sym_tristate_within_range(sym, yes);
case 'm': case 'M':
return sym_tristate_within_range(sym, mod);
case 'n': case 'N':
return sym_tristate_within_range(sym, no);
}
return false;
default:
return false;
}
}
bool sym_set_string_value(struct symbol *sym, const char *newval)
{
const char *oldval;
char *val;
int size;
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
switch (newval[0]) {
case 'y': case 'Y':
return sym_set_tristate_value(sym, yes);
case 'm': case 'M':
return sym_set_tristate_value(sym, mod);
case 'n': case 'N':
return sym_set_tristate_value(sym, no);
}
return false;
default:
;
}
if (!sym_string_within_range(sym, newval))
return false;
if (!(sym->flags & SYMBOL_DEF_USER)) {
sym->flags |= SYMBOL_DEF_USER;
sym_set_changed(sym);
}
oldval = sym->def[S_DEF_USER].val;
size = strlen(newval) + 1;
if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) {
size += 2;
sym->def[S_DEF_USER].val = val = malloc(size);
*val++ = '0';
*val++ = 'x';
} else if (!oldval || strcmp(oldval, newval))
sym->def[S_DEF_USER].val = val = malloc(size);
else
return true;
strcpy(val, newval);
free((void *)oldval);
sym_clear_all_valid();
return true;
}
const char *sym_get_string_value(struct symbol *sym)
{
tristate val;
switch (sym->type) {
case S_BOOLEAN:
case S_TRISTATE:
val = sym_get_tristate_value(sym);
switch (val) {
case no:
return "n";
case mod:
return "m";
case yes:
return "y";
}
break;
default:
;
}
return (const char *)sym->curr.val;
}
bool sym_is_changable(struct symbol *sym)
{
return sym->visible > sym->rev_dep.tri;
}
struct symbol *sym_lookup(const char *name, int flags)
{
struct symbol *symbol;
const char *ptr;
char *new_name;
int hash = 0;
if (name) {
if (name[0] && !name[1]) {
switch (name[0]) {
case 'y': return &symbol_yes;
case 'm': return &symbol_mod;
case 'n': return &symbol_no;
}
}
for (ptr = name; *ptr; ptr++)
hash += *ptr;
hash &= 0xff;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
if (!strcmp(symbol->name, name) &&
(flags ? symbol->flags & flags
: !(symbol->flags & (SYMBOL_CONST|SYMBOL_CHOICE))))
return symbol;
}
new_name = strdup(name);
} else {
new_name = NULL;
hash = 256;
}
symbol = malloc(sizeof(*symbol));
memset(symbol, 0, sizeof(*symbol));
symbol->name = new_name;
symbol->type = S_UNKNOWN;
symbol->flags |= flags;
symbol->next = symbol_hash[hash];
symbol_hash[hash] = symbol;
return symbol;
}
struct symbol *sym_find(const char *name)
{
struct symbol *symbol = NULL;
const char *ptr;
int hash = 0;
if (!name)
return NULL;
if (name[0] && !name[1]) {
switch (name[0]) {
case 'y': return &symbol_yes;
case 'm': return &symbol_mod;
case 'n': return &symbol_no;
}
}
for (ptr = name; *ptr; ptr++)
hash += *ptr;
hash &= 0xff;
for (symbol = symbol_hash[hash]; symbol; symbol = symbol->next) {
if (!strcmp(symbol->name, name) &&
!(symbol->flags & SYMBOL_CONST))
break;
}
return symbol;
}
struct symbol **sym_re_search(const char *pattern)
{
struct symbol *sym, **sym_arr = NULL;
int i, cnt, size;
regex_t re;
cnt = size = 0;
/* Skip if empty */
if (strlen(pattern) == 0)
return NULL;
if (regcomp(&re, pattern, REG_EXTENDED|REG_NOSUB|REG_ICASE))
return NULL;
for_all_symbols(i, sym) {
if (sym->flags & SYMBOL_CONST || !sym->name)
continue;
if (regexec(&re, sym->name, 0, NULL, 0))
continue;
if (cnt + 1 >= size) {
void *tmp = sym_arr;
size += 16;
sym_arr = realloc(sym_arr, size * sizeof(struct symbol *));
if (!sym_arr) {
free(tmp);
return NULL;
}
}
sym_arr[cnt++] = sym;
}
if (sym_arr)
sym_arr[cnt] = NULL;
regfree(&re);
return sym_arr;
}
static struct symbol *sym_check_expr_deps(struct expr *e)
{
struct symbol *sym;
if (!e)
return NULL;
switch (e->type) {
case E_OR:
case E_AND:
sym = sym_check_expr_deps(e->left.expr);
if (sym)
return sym;
return sym_check_expr_deps(e->right.expr);
case E_NOT:
return sym_check_expr_deps(e->left.expr);
case E_EQUAL:
case E_UNEQUAL:
sym = sym_check_deps(e->left.sym);
if (sym)
return sym;
return sym_check_deps(e->right.sym);
case E_SYMBOL:
return sym_check_deps(e->left.sym);
default:
break;
}
printf("Oops! How to check %d?\n", e->type);
return NULL;
}
/* return NULL when dependencies are OK */
static struct symbol *sym_check_sym_deps(struct symbol *sym)
{
struct symbol *sym2;
struct property *prop;
sym2 = sym_check_expr_deps(sym->rev_dep.expr);
if (sym2)
return sym2;
for (prop = sym->prop; prop; prop = prop->next) {
if (prop->type == P_CHOICE || prop->type == P_SELECT)
continue;
sym2 = sym_check_expr_deps(prop->visible.expr);
if (sym2)
break;
if (prop->type != P_DEFAULT || sym_is_choice(sym))
continue;
sym2 = sym_check_expr_deps(prop->expr);
if (sym2)
break;
}
return sym2;
}
static struct symbol *sym_check_choice_deps(struct symbol *choice)
{
struct symbol *sym, *sym2;
struct property *prop;
struct expr *e;
prop = sym_get_choice_prop(choice);
expr_list_for_each_sym(prop->expr, e, sym)
sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
choice->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
sym2 = sym_check_sym_deps(choice);
choice->flags &= ~SYMBOL_CHECK;
if (sym2)
goto out;
expr_list_for_each_sym(prop->expr, e, sym) {
sym2 = sym_check_sym_deps(sym);
if (sym2) {
fprintf(stderr, " -> %s", sym->name);
break;
}
}
out:
expr_list_for_each_sym(prop->expr, e, sym)
sym->flags &= ~SYMBOL_CHECK;
if (sym2 && sym_is_choice_value(sym2) &&
prop_get_symbol(sym_get_choice_prop(sym2)) == choice)
sym2 = choice;
return sym2;
}
struct symbol *sym_check_deps(struct symbol *sym)
{
struct symbol *sym2;
struct property *prop;
if (sym->flags & SYMBOL_CHECK) {
fprintf(stderr, "%s:%d:error: found recursive dependency: %s",
sym->prop->file->name, sym->prop->lineno,
sym->name ? sym->name : "<choice>");
return sym;
}
if (sym->flags & SYMBOL_CHECKED)
return NULL;
if (sym_is_choice_value(sym)) {
/* for choice groups start the check with main choice symbol */
prop = sym_get_choice_prop(sym);
sym2 = sym_check_deps(prop_get_symbol(prop));
} else if (sym_is_choice(sym)) {
sym2 = sym_check_choice_deps(sym);
} else {
sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED);
sym2 = sym_check_sym_deps(sym);
sym->flags &= ~SYMBOL_CHECK;
}
if (sym2) {
fprintf(stderr, " -> %s", sym->name ? sym->name : "<choice>");
if (sym2 == sym) {
fprintf(stderr, "\n");
zconfnerrs++;
sym2 = NULL;
}
}
return sym2;
}
struct property *prop_alloc(enum prop_type type, struct symbol *sym)
{
struct property *prop;
struct property **propp;
prop = malloc(sizeof(*prop));
memset(prop, 0, sizeof(*prop));
prop->type = type;
prop->sym = sym;
prop->file = current_file;
prop->lineno = zconf_lineno();
/* append property to the prop list of symbol */
if (sym) {
for (propp = &sym->prop; *propp; propp = &(*propp)->next)
;
*propp = prop;
}
return prop;
}
struct symbol *prop_get_symbol(struct property *prop)
{
if (prop->expr && (prop->expr->type == E_SYMBOL ||
prop->expr->type == E_LIST))
return prop->expr->left.sym;
return NULL;
}
const char *prop_get_type_name(enum prop_type type)
{
switch (type) {
case P_PROMPT:
return "prompt";
case P_ENV:
return "env";
case P_COMMENT:
return "comment";
case P_MENU:
return "menu";
case P_DEFAULT:
return "default";
case P_CHOICE:
return "choice";
case P_SELECT:
return "select";
case P_RANGE:
return "range";
case P_UNKNOWN:
break;
}
return "unknown";
}
void prop_add_env(const char *env)
{
struct symbol *sym, *sym2;
struct property *prop;
char *p;
sym = current_entry->sym;
sym->flags |= SYMBOL_AUTO;
for_all_properties(sym, prop, P_ENV) {
sym2 = prop_get_symbol(prop);
if (strcmp(sym2->name, env))
menu_warn(current_entry, "redefining environment symbol from %s",
sym2->name);
return;
}
prop = prop_alloc(P_ENV, sym);
prop->expr = expr_alloc_symbol(sym_lookup(env, SYMBOL_CONST));
sym_env_list = expr_alloc_one(E_LIST, sym_env_list);
sym_env_list->right.sym = sym;
p = getenv(env);
if (p)
sym_add_default(sym, p);
else
menu_warn(current_entry, "environment variable %s undefined", env);
}