source: drbl_ui/backup/test_busybox/busybox-1.7.2/scripts/kconfig/zconf.y @ 148

%{
/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 */

#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

#define LKC_DIRECT_LINK
#include "lkc.h"

#include "zconf.hash.c"

#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)

#define PRINTD    0x0001
#define DEBUG_PARSE 0x0002

int cdebug = PRINTD;

extern int zconflex(void);
static void zconfprint(const char *err, ...);
static void zconf_error(const char *err, ...);
static void zconferror(const char *err);
static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);

struct symbol *symbol_hash[257];

static struct menu *current_menu, *current_entry;

#define YYDEBUG 0
#if YYDEBUG
#define YYERROR_VERBOSE
#endif
%}
%expect 26

%union
{
  char *string;
  struct file *file;
  struct symbol *symbol;
  struct expr *expr;
  struct menu *menu;
  struct kconf_id *id;
}

%token <id>T_MAINMENU
%token <id>T_MENU
%token <id>T_ENDMENU
%token <id>T_SOURCE
%token <id>T_CHOICE
%token <id>T_ENDCHOICE
%token <id>T_COMMENT
%token <id>T_CONFIG
%token <id>T_MENUCONFIG
%token <id>T_HELP
%token <string> T_HELPTEXT
%token <id>T_IF
%token <id>T_ENDIF
%token <id>T_DEPENDS
%token <id>T_REQUIRES
%token <id>T_OPTIONAL
%token <id>T_PROMPT
%token <id>T_TYPE
%token <id>T_DEFAULT
%token <id>T_SELECT
%token <id>T_RANGE
%token <id>T_ON
%token <string> T_WORD
%token <string> T_WORD_QUOTE
%token T_UNEQUAL
%token T_CLOSE_PAREN
%token T_OPEN_PAREN
%token T_EOL

%left T_OR
%left T_AND
%left T_EQUAL T_UNEQUAL
%nonassoc T_NOT

%type <string> prompt
%type <symbol> symbol
%type <expr> expr
%type <expr> if_expr
%type <id> end
%type <id> option_name
%type <menu> if_entry menu_entry choice_entry

%destructor {
  fprintf(stderr, "%s:%d: missing end statement for this entry\n",
    $$->file->name, $$->lineno);
  if (current_menu == $$)
    menu_end_menu();
} if_entry menu_entry choice_entry

%%
input: stmt_list;

stmt_list:
    /* empty */
  | stmt_list common_stmt
  | stmt_list choice_stmt
  | stmt_list menu_stmt
  | stmt_list T_MAINMENU prompt nl
  | stmt_list end     { zconf_error("unexpected end statement"); }
  | stmt_list T_WORD error T_EOL  { zconf_error("unknown statement \"%s\"", $2); }
  | stmt_list option_name error T_EOL
{
  zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
}
  | stmt_list error T_EOL   { zconf_error("invalid statement"); }
;

option_name:
  T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | T_DEFAULT
;

common_stmt:
    T_EOL
  | if_stmt
  | comment_stmt
  | config_stmt
  | menuconfig_stmt
  | source_stmt
;

option_error:
    T_WORD error T_EOL    { zconf_error("unknown option \"%s\"", $1); }
  | error T_EOL     { zconf_error("invalid option"); }
;


/* config/menuconfig entry */

config_entry_start: T_CONFIG T_WORD T_EOL
{
  struct symbol *sym = sym_lookup($2, 0);
  sym->flags |= SYMBOL_OPTIONAL;
  menu_add_entry(sym);
  printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
};

config_stmt: config_entry_start config_option_list
{
  menu_end_entry();
  printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
};

menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
{
  struct symbol *sym = sym_lookup($2, 0);
  sym->flags |= SYMBOL_OPTIONAL;
  menu_add_entry(sym);
  printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2);
};

menuconfig_stmt: menuconfig_entry_start config_option_list
{
  if (current_entry->prompt)
    current_entry->prompt->type = P_MENU;
  else
    zconfprint("warning: menuconfig statement without prompt");
  menu_end_entry();
  printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
};

config_option_list:
    /* empty */
  | config_option_list config_option
  | config_option_list depends
  | config_option_list help
  | config_option_list option_error
  | config_option_list T_EOL
;

config_option: T_TYPE prompt_stmt_opt T_EOL
{
  menu_set_type($1->stype);
  printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
    zconf_curname(), zconf_lineno(),
    $1->stype);
};

config_option: T_PROMPT prompt if_expr T_EOL
{
  menu_add_prompt(P_PROMPT, $2, $3);
  printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
};

config_option: T_DEFAULT expr if_expr T_EOL
{
  menu_add_expr(P_DEFAULT, $2, $3);
  if ($1->stype != S_UNKNOWN)
    menu_set_type($1->stype);
  printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
    zconf_curname(), zconf_lineno(),
    $1->stype);
};

config_option: T_SELECT T_WORD if_expr T_EOL
{
  menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
  printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
};

config_option: T_RANGE symbol symbol if_expr T_EOL
{
  menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
  printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
};

/* choice entry */

choice: T_CHOICE T_EOL
{
  struct symbol *sym = sym_lookup(NULL, 0);
  sym->flags |= SYMBOL_CHOICE;
  menu_add_entry(sym);
  menu_add_expr(P_CHOICE, NULL, NULL);
  printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
};

choice_entry: choice choice_option_list
{
  $$ = menu_add_menu();
};

choice_end: end
{
  if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
    menu_end_menu();
    printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
  }
};

choice_stmt: choice_entry choice_block choice_end
;

choice_option_list:
    /* empty */
  | choice_option_list choice_option
  | choice_option_list depends
  | choice_option_list help
  | choice_option_list T_EOL
  | choice_option_list option_error
;

choice_option: T_PROMPT prompt if_expr T_EOL
{
  menu_add_prompt(P_PROMPT, $2, $3);
  printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
};

choice_option: T_TYPE prompt_stmt_opt T_EOL
{
  if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
    menu_set_type($1->stype);
    printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
      zconf_curname(), zconf_lineno(),
      $1->stype);
  } else
    YYERROR;
};

choice_option: T_OPTIONAL T_EOL
{
  current_entry->sym->flags |= SYMBOL_OPTIONAL;
  printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
};

choice_option: T_DEFAULT T_WORD if_expr T_EOL
{
  if ($1->stype == S_UNKNOWN) {
    menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
    printd(DEBUG_PARSE, "%s:%d:default\n",
      zconf_curname(), zconf_lineno());
  } else
    YYERROR;
};

choice_block:
    /* empty */
  | choice_block common_stmt
;

/* if entry */

if_entry: T_IF expr nl
{
  printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
  menu_add_entry(NULL);
  menu_add_dep($2);
  $$ = menu_add_menu();
};

if_end: end
{
  if (zconf_endtoken($1, T_IF, T_ENDIF)) {
    menu_end_menu();
    printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
  }
};

if_stmt: if_entry if_block if_end
;

if_block:
    /* empty */
  | if_block common_stmt
  | if_block menu_stmt
  | if_block choice_stmt
;

/* menu entry */

menu: T_MENU prompt T_EOL
{
  menu_add_entry(NULL);
  menu_add_prompt(P_MENU, $2, NULL);
  printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
};

menu_entry: menu depends_list
{
  $$ = menu_add_menu();
};

menu_end: end
{
  if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
    menu_end_menu();
    printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
  }
};

menu_stmt: menu_entry menu_block menu_end
;

menu_block:
    /* empty */
  | menu_block common_stmt
  | menu_block menu_stmt
  | menu_block choice_stmt
;

source_stmt: T_SOURCE prompt T_EOL
{
  printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
  zconf_nextfile($2);
};

/* comment entry */

comment: T_COMMENT prompt T_EOL
{
  menu_add_entry(NULL);
  menu_add_prompt(P_COMMENT, $2, NULL);
  printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
};

comment_stmt: comment depends_list
{
  menu_end_entry();
};

/* help option */

help_start: T_HELP T_EOL
{
  printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
  zconf_starthelp();
};

help: help_start T_HELPTEXT
{
  current_entry->sym->help = $2;
};

/* depends option */

depends_list:
    /* empty */
  | depends_list depends
  | depends_list T_EOL
  | depends_list option_error
;

depends: T_DEPENDS T_ON expr T_EOL
{
  menu_add_dep($3);
  printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
}
  | T_DEPENDS expr T_EOL
{
  menu_add_dep($2);
  printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
}
  | T_REQUIRES expr T_EOL
{
  menu_add_dep($2);
  printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
};

/* prompt statement */

prompt_stmt_opt:
    /* empty */
  | prompt if_expr
{
  menu_add_prompt(P_PROMPT, $1, $2);
};

prompt:   T_WORD
  | T_WORD_QUOTE
;

end:    T_ENDMENU T_EOL { $$ = $1; }
  | T_ENDCHOICE T_EOL { $$ = $1; }
  | T_ENDIF T_EOL   { $$ = $1; }
;

nl:
    T_EOL
  | nl T_EOL
;

if_expr:  /* empty */     { $$ = NULL; }
  | T_IF expr     { $$ = $2; }
;

expr:   symbol        { $$ = expr_alloc_symbol($1); }
  | symbol T_EQUAL symbol     { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
  | symbol T_UNEQUAL symbol   { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
  | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; }
  | T_NOT expr        { $$ = expr_alloc_one(E_NOT, $2); }
  | expr T_OR expr      { $$ = expr_alloc_two(E_OR, $1, $3); }
  | expr T_AND expr     { $$ = expr_alloc_two(E_AND, $1, $3); }
;

symbol:   T_WORD  { $$ = sym_lookup($1, 0); free($1); }
  | T_WORD_QUOTE  { $$ = sym_lookup($1, 1); free($1); }
;

%%

void conf_parse(const char *name)
{
  struct symbol *sym;
  int i;

  zconf_initscan(name);

  sym_init();
  menu_init();
  modules_sym = sym_lookup("MODULES", 0);
  rootmenu.prompt = menu_add_prompt(P_MENU, "Busybox Configuration", NULL);

#if YYDEBUG
  if (getenv("ZCONF_DEBUG"))
    zconfdebug = 1;
#endif
  zconfparse();
  if (zconfnerrs)
    exit(1);
  menu_finalize(&rootmenu);
  for_all_symbols(i, sym) {
    sym_check_deps(sym);
        }

  sym_change_count = 1;
}

const char *zconf_tokenname(int token)
{
  switch (token) {
  case T_MENU:    return "menu";
  case T_ENDMENU:   return "endmenu";
  case T_CHOICE:    return "choice";
  case T_ENDCHOICE: return "endchoice";
  case T_IF:    return "if";
  case T_ENDIF:   return "endif";
  case T_DEPENDS:   return "depends";
  }
  return "<token>";
}

static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
{
  if (id->token != endtoken) {
    zconf_error("unexpected '%s' within %s block",
      kconf_id_strings + id->name, zconf_tokenname(starttoken));
    zconfnerrs++;
    return false;
  }
  if (current_menu->file != current_file) {
    zconf_error("'%s' in different file than '%s'",
      kconf_id_strings + id->name, zconf_tokenname(starttoken));
    fprintf(stderr, "%s:%d: location of the '%s'\n",
      current_menu->file->name, current_menu->lineno,
      zconf_tokenname(starttoken));
    zconfnerrs++;
    return false;
  }
  return true;
}

static void zconfprint(const char *err, ...)
{
  va_list ap;

  fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
  va_start(ap, err);
  vfprintf(stderr, err, ap);
  va_end(ap);
  fprintf(stderr, "\n");
}

static void zconf_error(const char *err, ...)
{
  va_list ap;

  zconfnerrs++;
  fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
  va_start(ap, err);
  vfprintf(stderr, err, ap);
  va_end(ap);
  fprintf(stderr, "\n");
}

static void zconferror(const char *err)
{
#if YYDEBUG
  fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
#endif
}

void print_quoted_string(FILE *out, const char *str)
{
  const char *p;
  int len;

  putc('"', out);
  while ((p = strchr(str, '"'))) {
    len = p - str;
    if (len)
      fprintf(out, "%.*s", len, str);
    fputs("\\\"", out);
    str = p + 1;
  }
  fputs(str, out);
  putc('"', out);
}

void print_symbol(FILE *out, struct menu *menu)
{
  struct symbol *sym = menu->sym;
  struct property *prop;

  if (sym_is_choice(sym))
    fprintf(out, "choice\n");
  else
    fprintf(out, "config %s\n", sym->name);
  switch (sym->type) {
  case S_BOOLEAN:
    fputs("  boolean\n", out);
    break;
  case S_TRISTATE:
    fputs("  tristate\n", out);
    break;
  case S_STRING:
    fputs("  string\n", out);
    break;
  case S_INT:
    fputs("  integer\n", out);
    break;
  case S_HEX:
    fputs("  hex\n", out);
    break;
  default:
    fputs("  ???\n", out);
    break;
  }
  for (prop = sym->prop; prop; prop = prop->next) {
    if (prop->menu != menu)
      continue;
    switch (prop->type) {
    case P_PROMPT:
      fputs("  prompt ", out);
      print_quoted_string(out, prop->text);
      if (!expr_is_yes(prop->visible.expr)) {
        fputs(" if ", out);
        expr_fprint(prop->visible.expr, out);
      }
      fputc('\n', out);
      break;
    case P_DEFAULT:
      fputs( "  default ", out);
      expr_fprint(prop->expr, out);
      if (!expr_is_yes(prop->visible.expr)) {
        fputs(" if ", out);
        expr_fprint(prop->visible.expr, out);
      }
      fputc('\n', out);
      break;
    case P_CHOICE:
      fputs("  #choice value\n", out);
      break;
    default:
      fprintf(out, "  unknown prop %d!\n", prop->type);
      break;
    }
  }
  if (sym->help) {
    int len = strlen(sym->help);
    while (sym->help[--len] == '\n')
      sym->help[len] = 0;
    fprintf(out, "  help\n%s\n", sym->help);
  }
  fputc('\n', out);
}

void zconfdump(FILE *out)
{
  struct property *prop;
  struct symbol *sym;
  struct menu *menu;

  menu = rootmenu.list;
  while (menu) {
    if ((sym = menu->sym))
      print_symbol(out, menu);
    else if ((prop = menu->prompt)) {
      switch (prop->type) {
      case P_COMMENT:
        fputs("\ncomment ", out);
        print_quoted_string(out, prop->text);
        fputs("\n", out);
        break;
      case P_MENU:
        fputs("\nmenu ", out);
        print_quoted_string(out, prop->text);
        fputs("\n", out);
        break;
      default:
        ;
      }
      if (!expr_is_yes(prop->visible.expr)) {
        fputs("  depends ", out);
        expr_fprint(prop->visible.expr, out);
        fputc('\n', out);
      }
      fputs("\n", out);
    }

    if (menu->list)
      menu = menu->list;
    else if (menu->next)
      menu = menu->next;
    else while ((menu = menu->parent)) {
      if (menu->prompt && menu->prompt->type == P_MENU)
        fputs("\nendmenu\n", out);
      if (menu->next) {
        menu = menu->next;
        break;
      }
    }
  }
}

#include "lex.zconf.c"
#include "util.c"
#include "confdata.c"
#include "expr.c"
#include "symbol.c"
#include "menu.c"