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6.8.0-36-generic
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parser.y
/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> */ %{ #include <ctype.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdbool.h> #include "lkc.h" #include "internal.h" #define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt) #define PRINTD 0x0001 #define DEBUG_PARSE 0x0002 int cdebug = PRINTD; static void yyerror(const char *err); static void zconfprint(const char *err, ...); static void zconf_error(const char *err, ...); static bool zconf_endtoken(const char *tokenname, const char *expected_tokenname); struct symbol *symbol_hash[SYMBOL_HASHSIZE]; struct menu *current_menu, *current_entry; %} %union { char *string; struct symbol *symbol; struct expr *expr; struct menu *menu; enum symbol_type type; enum variable_flavor flavor; } %token <string> T_HELPTEXT %token <string> T_WORD %token <string> T_WORD_QUOTE %token T_BOOL %token T_CHOICE %token T_CLOSE_PAREN %token T_COLON_EQUAL %token T_COMMENT %token T_CONFIG %token T_DEFAULT %token T_DEF_BOOL %token T_DEF_TRISTATE %token T_DEPENDS %token T_ENDCHOICE %token T_ENDIF %token T_ENDMENU %token T_HELP %token T_HEX %token T_IF %token T_IMPLY %token T_INT %token T_MAINMENU %token T_MENU %token T_MENUCONFIG %token T_MODULES %token T_ON %token T_OPEN_PAREN %token T_OPTIONAL %token T_PLUS_EQUAL %token T_PROMPT %token T_RANGE %token T_SELECT %token T_SOURCE %token T_STRING %token T_TRISTATE %token T_VISIBLE %token T_EOL %token <string> T_ASSIGN_VAL %left T_OR %left T_AND %left T_EQUAL T_UNEQUAL %left T_LESS T_LESS_EQUAL T_GREATER T_GREATER_EQUAL %nonassoc T_NOT %type <symbol> nonconst_symbol %type <symbol> symbol %type <type> type logic_type default %type <expr> expr %type <expr> if_expr %type <string> end %type <menu> if_entry menu_entry choice_entry %type <string> word_opt assign_val %type <flavor> assign_op %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: mainmenu_stmt stmt_list | stmt_list; /* mainmenu entry */ mainmenu_stmt: T_MAINMENU T_WORD_QUOTE T_EOL { menu_add_prompt(P_MENU, $2, NULL); }; stmt_list: /* empty */ | stmt_list assignment_stmt | stmt_list choice_stmt | stmt_list comment_stmt | stmt_list config_stmt | stmt_list if_stmt | stmt_list menu_stmt | stmt_list menuconfig_stmt | stmt_list source_stmt | stmt_list T_WORD error T_EOL { zconf_error("unknown statement \"%s\"", $2); } | stmt_list error T_EOL { zconf_error("invalid statement"); } ; stmt_list_in_choice: /* empty */ | stmt_list_in_choice comment_stmt | stmt_list_in_choice config_stmt | stmt_list_in_choice if_stmt_in_choice | stmt_list_in_choice error T_EOL { zconf_error("invalid statement"); } ; /* config/menuconfig entry */ config_entry_start: T_CONFIG nonconst_symbol T_EOL { $2->flags |= SYMBOL_OPTIONAL; menu_add_entry($2); printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2->name); }; config_stmt: config_entry_start config_option_list { printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno()); }; menuconfig_entry_start: T_MENUCONFIG nonconst_symbol T_EOL { $2->flags |= SYMBOL_OPTIONAL; menu_add_entry($2); printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2->name); }; 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"); 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: type prompt_stmt_opt T_EOL { menu_set_type($1); printd(DEBUG_PARSE, "%s:%d:type(%u)\n", zconf_curname(), zconf_lineno(), $1); }; config_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL { menu_add_prompt(P_PROMPT, $2, $3); printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno()); }; config_option: default expr if_expr T_EOL { menu_add_expr(P_DEFAULT, $2, $3); if ($1 != S_UNKNOWN) menu_set_type($1); printd(DEBUG_PARSE, "%s:%d:default(%u)\n", zconf_curname(), zconf_lineno(), $1); }; config_option: T_SELECT nonconst_symbol if_expr T_EOL { menu_add_symbol(P_SELECT, $2, $3); printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno()); }; config_option: T_IMPLY nonconst_symbol if_expr T_EOL { menu_add_symbol(P_IMPLY, $2, $3); printd(DEBUG_PARSE, "%s:%d:imply\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()); }; config_option: T_MODULES T_EOL { if (modules_sym) zconf_error("symbol '%s' redefines option 'modules' already defined by symbol '%s'", current_entry->sym->name, modules_sym->name); modules_sym = current_entry->sym; }; /* choice entry */ choice: T_CHOICE word_opt T_EOL { struct symbol *sym = sym_lookup($2, SYMBOL_CHOICE); sym->flags |= SYMBOL_NO_WRITE; menu_add_entry(sym); menu_add_expr(P_CHOICE, NULL, NULL); free($2); 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, "choice")) { menu_end_menu(); printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno()); } }; choice_stmt: choice_entry stmt_list_in_choice choice_end ; choice_option_list: /* empty */ | choice_option_list choice_option | choice_option_list depends | choice_option_list help ; choice_option: T_PROMPT T_WORD_QUOTE if_expr T_EOL { menu_add_prompt(P_PROMPT, $2, $3); printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno()); }; choice_option: logic_type prompt_stmt_opt T_EOL { menu_set_type($1); printd(DEBUG_PARSE, "%s:%d:type(%u)\n", zconf_curname(), zconf_lineno(), $1); }; 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 nonconst_symbol if_expr T_EOL { menu_add_symbol(P_DEFAULT, $2, $3); printd(DEBUG_PARSE, "%s:%d:default\n", zconf_curname(), zconf_lineno()); }; type: logic_type | T_INT { $$ = S_INT; } | T_HEX { $$ = S_HEX; } | T_STRING { $$ = S_STRING; } logic_type: T_BOOL { $$ = S_BOOLEAN; } | T_TRISTATE { $$ = S_TRISTATE; } default: T_DEFAULT { $$ = S_UNKNOWN; } | T_DEF_BOOL { $$ = S_BOOLEAN; } | T_DEF_TRISTATE { $$ = S_TRISTATE; } /* if entry */ if_entry: T_IF expr T_EOL { printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno()); menu_add_entry(NULL); menu_add_dep($2); $$ = menu_add_menu(); }; if_end: end { if (zconf_endtoken($1, "if")) { menu_end_menu(); printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno()); } }; if_stmt: if_entry stmt_list if_end ; if_stmt_in_choice: if_entry stmt_list_in_choice if_end ; /* menu entry */ menu: T_MENU T_WORD_QUOTE T_EOL { menu_add_entry(NULL); menu_add_prompt(P_MENU, $2, NULL); printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno()); }; menu_entry: menu menu_option_list { $$ = menu_add_menu(); }; menu_end: end { if (zconf_endtoken($1, "menu")) { menu_end_menu(); printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno()); } }; menu_stmt: menu_entry stmt_list menu_end ; menu_option_list: /* empty */ | menu_option_list visible | menu_option_list depends ; source_stmt: T_SOURCE T_WORD_QUOTE T_EOL { printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2); zconf_nextfile($2); free($2); }; /* comment entry */ comment: T_COMMENT T_WORD_QUOTE 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 comment_option_list ; comment_option_list: /* empty */ | comment_option_list depends ; /* 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 { if (current_entry->help) { free(current_entry->help); zconfprint("warning: '%s' defined with more than one help text -- only the last one will be used", current_entry->sym->name ?: "<choice>"); } /* Is the help text empty or all whitespace? */ if ($2[strspn($2, " \f\n\r\t\v")] == '\0') zconfprint("warning: '%s' defined with blank help text", current_entry->sym->name ?: "<choice>"); current_entry->help = $2; }; /* depends option */ depends: T_DEPENDS T_ON expr T_EOL { menu_add_dep($3); printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno()); }; /* visibility option */ visible: T_VISIBLE if_expr T_EOL { menu_add_visibility($2); }; /* prompt statement */ prompt_stmt_opt: /* empty */ | T_WORD_QUOTE if_expr { menu_add_prompt(P_PROMPT, $1, $2); }; end: T_ENDMENU T_EOL { $$ = "menu"; } | T_ENDCHOICE T_EOL { $$ = "choice"; } | T_ENDIF T_EOL { $$ = "if"; } ; if_expr: /* empty */ { $$ = NULL; } | T_IF expr { $$ = $2; } ; expr: symbol { $$ = expr_alloc_symbol($1); } | symbol T_LESS symbol { $$ = expr_alloc_comp(E_LTH, $1, $3); } | symbol T_LESS_EQUAL symbol { $$ = expr_alloc_comp(E_LEQ, $1, $3); } | symbol T_GREATER symbol { $$ = expr_alloc_comp(E_GTH, $1, $3); } | symbol T_GREATER_EQUAL symbol { $$ = expr_alloc_comp(E_GEQ, $1, $3); } | 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); } ; /* For symbol definitions, selects, etc., where quotes are not accepted */ nonconst_symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); }; symbol: nonconst_symbol | T_WORD_QUOTE { $$ = sym_lookup($1, SYMBOL_CONST); free($1); } ; word_opt: /* empty */ { $$ = NULL; } | T_WORD /* assignment statement */ assignment_stmt: T_WORD assign_op assign_val T_EOL { variable_add($1, $3, $2); free($1); free($3); } assign_op: T_EQUAL { $$ = VAR_RECURSIVE; } | T_COLON_EQUAL { $$ = VAR_SIMPLE; } | T_PLUS_EQUAL { $$ = VAR_APPEND; } ; assign_val: /* empty */ { $$ = xstrdup(""); }; | T_ASSIGN_VAL ; %% void conf_parse(const char *name) { struct symbol *sym; int i; zconf_initscan(name); _menu_init(); if (getenv("ZCONF_DEBUG")) yydebug = 1; yyparse(); /* Variables are expanded in the parse phase. We can free them here. */ variable_all_del(); if (yynerrs) exit(1); if (!modules_sym) modules_sym = sym_find( "n" ); if (!menu_has_prompt(&rootmenu)) { current_entry = &rootmenu; menu_add_prompt(P_MENU, "Main menu", NULL); } menu_finalize(&rootmenu); for_all_symbols(i, sym) { if (sym_check_deps(sym)) yynerrs++; } if (yynerrs) exit(1); conf_set_changed(true); } static bool zconf_endtoken(const char *tokenname, const char *expected_tokenname) { if (strcmp(tokenname, expected_tokenname)) { zconf_error("unexpected '%s' within %s block", tokenname, expected_tokenname); yynerrs++; return false; } if (current_menu->file != current_file) { zconf_error("'%s' in different file than '%s'", tokenname, expected_tokenname); fprintf(stderr, "%s:%d: location of the '%s'\n", current_menu->file->name, current_menu->lineno, expected_tokenname); yynerrs++; 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; yynerrs++; fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno()); va_start(ap, err); vfprintf(stderr, err, ap); va_end(ap); fprintf(stderr, "\n"); } static void yyerror(const char *err) { fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err); } static 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); } static void print_symbol(FILE *out, struct menu *menu) { struct symbol *sym = menu->sym; struct property *prop; if (sym_is_choice(sym)) fprintf(out, "\nchoice\n"); else fprintf(out, "\nconfig %s\n", sym->name); switch (sym->type) { case S_BOOLEAN: fputs(" bool\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; case P_SELECT: fputs( " select ", out); expr_fprint(prop->expr, out); fputc('\n', out); break; case P_IMPLY: fputs( " imply ", out); expr_fprint(prop->expr, out); fputc('\n', out); break; case P_RANGE: fputs( " range ", out); expr_fprint(prop->expr, out); fputc('\n', out); break; case P_MENU: fputs( " menu ", out); print_quoted_string(out, prop->text); fputc('\n', out); break; case P_SYMBOL: fputs( " symbol ", out); fprintf(out, "%s\n", prop->menu->sym->name); break; default: fprintf(out, " unknown prop %d!\n", prop->type); break; } } if (menu->help) { int len = strlen(menu->help); while (menu->help[--len] == '\n') menu->help[len] = 0; fprintf(out, " help\n%s\n", menu->help); } } 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); } } 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; } } } }
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