/* * 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 <sys/utsname.h> #define LKC_DIRECT_LINK #include "lkc.h" struct symbol symbol_yes = { name: "y", curr: { "y", yes }, flags: SYMBOL_YES|SYMBOL_VALID, }, symbol_mod = { name: "m", curr: { "m", mod }, flags: SYMBOL_MOD|SYMBOL_VALID, }, symbol_no = { name: "n", curr: { "n", no }, flags: SYMBOL_NO|SYMBOL_VALID, }, symbol_empty = { name: "", curr: { "", no }, flags: SYMBOL_VALID, }; int sym_change_count; struct symbol *modules_sym; 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, 1)); } void sym_init(void) { struct symbol *sym; struct utsname uts; char *p; static bool inited = false; if (inited) return; inited = true; uname(&uts); sym = sym_lookup("ARCH", 0); sym->type = S_STRING; sym->flags |= SYMBOL_AUTO; p = getenv("ARCH"); if (p) sym_add_default(sym, p); sym = sym_lookup("KERNELRELEASE", 0); sym->type = S_STRING; sym->flags |= SYMBOL_AUTO; p = getenv("KERNELRELEASE"); if (p) sym_add_default(sym, p); 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 { sym_calc_value(modules_sym); if (modules_sym->curr.tri == 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_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 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 = E_OR(tri, prop->visible.tri); } 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 (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->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); for (e = prop->expr; e; e = e->left.expr) { def_sym = e->right.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 (E_OR(sym->visible, sym->rev_dep.tri) != no) { sym->flags |= SYMBOL_WRITE; if (sym_has_value(sym)) newval.tri = sym->user.tri; else if (!sym_is_choice(sym)) { prop = sym_get_default_prop(sym); if (prop) newval.tri = expr_calc_value(prop->expr); } newval.tri = E_OR(E_AND(newval.tri, sym->visible), sym->rev_dep.tri); } else if (!sym_is_choice(sym)) { prop = sym_get_default_prop(sym); if (prop) { sym->flags |= SYMBOL_WRITE; newval.tri = expr_calc_value(prop->expr); } } if (sym_get_type(sym) == S_BOOLEAN) { if (newval.tri == mod) newval.tri = yes; if (sym->visible == mod) sym->visible = yes; if (sym->rev_dep.tri == mod) sym->rev_dep.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->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); if (memcmp(&oldval, &sym->curr, sizeof(oldval))) sym_set_changed(sym); if (sym_is_choice(sym)) { int flags = sym->flags & (SYMBOL_CHANGED | SYMBOL_WRITE); prop = sym_get_choice_prop(sym); for (e = prop->expr; e; e = e->left.expr) { e->right.sym->flags |= flags; if (flags & SYMBOL_CHANGED) sym_set_changed(e->right.sym); } } } void sym_clear_all_valid(void) { struct symbol *sym; int i; for_all_symbols(i, sym) sym->flags &= ~SYMBOL_VALID; sym_change_count++; } 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_NEW) { sym->flags &= ~SYMBOL_NEW; sym_set_changed(sym); } if (sym_is_choice_value(sym) && val == yes) { struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); cs->user.val = sym; cs->flags &= ~SYMBOL_NEW; } sym->user.tri = val; if (oldval != val) { sym_clear_all_valid(); if (sym == modules_sym) sym_set_all_changed(); } 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) { 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 >= strtol(prop->expr->left.sym->name, NULL, 10) && val <= strtol(prop->expr->right.sym->name, NULL, 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 >= strtol(prop->expr->left.sym->name, NULL, 16) && val <= strtol(prop->expr->right.sym->name, NULL, 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_NEW) { sym->flags &= ~SYMBOL_NEW; sym_set_changed(sym); } oldval = sym->user.val; size = strlen(newval) + 1; if (sym->type == S_HEX && (newval[0] != '0' || (newval[1] != 'x' && newval[1] != 'X'))) { size += 2; sym->user.val = val = malloc(size); *val++ = '0'; *val++ = 'x'; } else if (!oldval || strcmp(oldval, newval)) sym->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 isconst) { 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)) { if ((isconst && symbol->flags & SYMBOL_CONST) || (!isconst && !(symbol->flags & SYMBOL_CONST))) 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 = SYMBOL_NEW; if (isconst) symbol->flags |= SYMBOL_CONST; 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_check_deps(struct symbol *sym); 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; } struct symbol *sym_check_deps(struct symbol *sym) { struct symbol *sym2; struct property *prop; if (sym->flags & SYMBOL_CHECK_DONE) return NULL; if (sym->flags & SYMBOL_CHECK) { printf("Warning! Found recursive dependency: %s", sym->name); return sym; } sym->flags |= (SYMBOL_CHECK | SYMBOL_CHECKED); sym2 = sym_check_expr_deps(sym->rev_dep.expr); if (sym2) goto out; for (prop = sym->prop; prop; prop = prop->next) { if (prop->type == P_CHOICE) continue; sym2 = sym_check_expr_deps(prop->visible.expr); if (sym2) goto out; if (prop->type != P_DEFAULT || sym_is_choice(sym)) continue; sym2 = sym_check_expr_deps(prop->expr); if (sym2) goto out; } out: if (sym2) printf(" %s", sym->name); sym->flags &= ~SYMBOL_CHECK; 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_CHOICE)) 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_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"; }