| /* |
| * Stupid C parser, version 1e-6. |
| * |
| * Let's see how hard this is to do. |
| * |
| * Copyright (C) 2003 Transmeta Corp. |
| * 2003-2004 Linus Torvalds |
| * Copyright (C) 2004 Christopher Li |
| * |
| * Licensed under the Open Software License version 1.1 |
| */ |
| |
| #include <stdarg.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <limits.h> |
| |
| #include "lib.h" |
| #include "allocate.h" |
| #include "token.h" |
| #include "parse.h" |
| #include "symbol.h" |
| #include "scope.h" |
| #include "expression.h" |
| #include "target.h" |
| |
| static struct symbol_list **function_symbol_list; |
| struct symbol_list *function_computed_target_list; |
| struct statement_list *function_computed_goto_list; |
| |
| static struct token *statement(struct token *token, struct statement **tree); |
| static struct token *handle_attributes(struct token *token, struct decl_state *ctx, unsigned int keywords); |
| |
| typedef struct token *declarator_t(struct token *, struct decl_state *); |
| static declarator_t |
| struct_specifier, union_specifier, enum_specifier, |
| attribute_specifier, typeof_specifier, parse_asm_declarator, |
| typedef_specifier, inline_specifier, auto_specifier, |
| register_specifier, static_specifier, extern_specifier, |
| thread_specifier, const_qualifier, volatile_qualifier; |
| |
| static struct token *parse_if_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_return_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_loop_iterator(struct token *token, struct statement *stmt); |
| static struct token *parse_default_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_case_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_switch_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_for_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_while_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_do_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_goto_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_context_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_range_statement(struct token *token, struct statement *stmt); |
| static struct token *parse_asm_statement(struct token *token, struct statement *stmt); |
| static struct token *toplevel_asm_declaration(struct token *token, struct symbol_list **list); |
| |
| typedef struct token *attr_t(struct token *, struct symbol *, |
| struct decl_state *); |
| |
| static attr_t |
| attribute_packed, attribute_aligned, attribute_modifier, |
| attribute_address_space, attribute_context, |
| attribute_designated_init, |
| attribute_transparent_union, ignore_attribute, |
| attribute_mode, attribute_force; |
| |
| typedef struct symbol *to_mode_t(struct symbol *); |
| |
| static to_mode_t |
| to_QI_mode, to_HI_mode, to_SI_mode, to_DI_mode, to_TI_mode, to_word_mode; |
| |
| enum { |
| Set_T = 1, |
| Set_S = 2, |
| Set_Char = 4, |
| Set_Int = 8, |
| Set_Double = 16, |
| Set_Float = 32, |
| Set_Signed = 64, |
| Set_Unsigned = 128, |
| Set_Short = 256, |
| Set_Long = 512, |
| Set_Vlong = 1024, |
| Set_Any = Set_T | Set_Short | Set_Long | Set_Signed | Set_Unsigned |
| }; |
| |
| enum { |
| CInt = 0, CSInt, CUInt, CReal, CChar, CSChar, CUChar |
| }; |
| |
| enum { |
| SNone = 0, STypedef, SAuto, SRegister, SExtern, SStatic, SForced |
| }; |
| |
| static struct symbol_op typedef_op = { |
| .type = KW_MODIFIER, |
| .declarator = typedef_specifier, |
| }; |
| |
| static struct symbol_op inline_op = { |
| .type = KW_MODIFIER, |
| .declarator = inline_specifier, |
| }; |
| |
| static struct symbol_op auto_op = { |
| .type = KW_MODIFIER, |
| .declarator = auto_specifier, |
| }; |
| |
| static struct symbol_op register_op = { |
| .type = KW_MODIFIER, |
| .declarator = register_specifier, |
| }; |
| |
| static struct symbol_op static_op = { |
| .type = KW_MODIFIER, |
| .declarator = static_specifier, |
| }; |
| |
| static struct symbol_op extern_op = { |
| .type = KW_MODIFIER, |
| .declarator = extern_specifier, |
| }; |
| |
| static struct symbol_op thread_op = { |
| .type = KW_MODIFIER, |
| .declarator = thread_specifier, |
| }; |
| |
| static struct symbol_op const_op = { |
| .type = KW_QUALIFIER, |
| .declarator = const_qualifier, |
| }; |
| |
| static struct symbol_op volatile_op = { |
| .type = KW_QUALIFIER, |
| .declarator = volatile_qualifier, |
| }; |
| |
| static struct symbol_op restrict_op = { |
| .type = KW_QUALIFIER, |
| }; |
| |
| static struct symbol_op typeof_op = { |
| .type = KW_SPECIFIER, |
| .declarator = typeof_specifier, |
| .test = Set_Any, |
| .set = Set_S|Set_T, |
| }; |
| |
| static struct symbol_op attribute_op = { |
| .type = KW_ATTRIBUTE, |
| .declarator = attribute_specifier, |
| }; |
| |
| static struct symbol_op struct_op = { |
| .type = KW_SPECIFIER, |
| .declarator = struct_specifier, |
| .test = Set_Any, |
| .set = Set_S|Set_T, |
| }; |
| |
| static struct symbol_op union_op = { |
| .type = KW_SPECIFIER, |
| .declarator = union_specifier, |
| .test = Set_Any, |
| .set = Set_S|Set_T, |
| }; |
| |
| static struct symbol_op enum_op = { |
| .type = KW_SPECIFIER, |
| .declarator = enum_specifier, |
| .test = Set_Any, |
| .set = Set_S|Set_T, |
| }; |
| |
| static struct symbol_op spec_op = { |
| .type = KW_SPECIFIER | KW_EXACT, |
| .test = Set_Any, |
| .set = Set_S|Set_T, |
| }; |
| |
| static struct symbol_op char_op = { |
| .type = KW_SPECIFIER, |
| .test = Set_T|Set_Long|Set_Short, |
| .set = Set_T|Set_Char, |
| .class = CChar, |
| }; |
| |
| static struct symbol_op int_op = { |
| .type = KW_SPECIFIER, |
| .test = Set_T, |
| .set = Set_T|Set_Int, |
| }; |
| |
| static struct symbol_op double_op = { |
| .type = KW_SPECIFIER, |
| .test = Set_T|Set_Signed|Set_Unsigned|Set_Short|Set_Vlong, |
| .set = Set_T|Set_Double, |
| .class = CReal, |
| }; |
| |
| static struct symbol_op float_op = { |
| .type = KW_SPECIFIER | KW_SHORT, |
| .test = Set_T|Set_Signed|Set_Unsigned|Set_Short|Set_Long, |
| .set = Set_T|Set_Float, |
| .class = CReal, |
| }; |
| |
| static struct symbol_op short_op = { |
| .type = KW_SPECIFIER | KW_SHORT, |
| .test = Set_S|Set_Char|Set_Float|Set_Double|Set_Long|Set_Short, |
| .set = Set_Short, |
| }; |
| |
| static struct symbol_op signed_op = { |
| .type = KW_SPECIFIER, |
| .test = Set_S|Set_Float|Set_Double|Set_Signed|Set_Unsigned, |
| .set = Set_Signed, |
| .class = CSInt, |
| }; |
| |
| static struct symbol_op unsigned_op = { |
| .type = KW_SPECIFIER, |
| .test = Set_S|Set_Float|Set_Double|Set_Signed|Set_Unsigned, |
| .set = Set_Unsigned, |
| .class = CUInt, |
| }; |
| |
| static struct symbol_op long_op = { |
| .type = KW_SPECIFIER | KW_LONG, |
| .test = Set_S|Set_Char|Set_Float|Set_Short|Set_Vlong, |
| .set = Set_Long, |
| }; |
| |
| static struct symbol_op if_op = { |
| .statement = parse_if_statement, |
| }; |
| |
| static struct symbol_op return_op = { |
| .statement = parse_return_statement, |
| }; |
| |
| static struct symbol_op loop_iter_op = { |
| .statement = parse_loop_iterator, |
| }; |
| |
| static struct symbol_op default_op = { |
| .statement = parse_default_statement, |
| }; |
| |
| static struct symbol_op case_op = { |
| .statement = parse_case_statement, |
| }; |
| |
| static struct symbol_op switch_op = { |
| .statement = parse_switch_statement, |
| }; |
| |
| static struct symbol_op for_op = { |
| .statement = parse_for_statement, |
| }; |
| |
| static struct symbol_op while_op = { |
| .statement = parse_while_statement, |
| }; |
| |
| static struct symbol_op do_op = { |
| .statement = parse_do_statement, |
| }; |
| |
| static struct symbol_op goto_op = { |
| .statement = parse_goto_statement, |
| }; |
| |
| static struct symbol_op __context___op = { |
| .statement = parse_context_statement, |
| }; |
| |
| static struct symbol_op range_op = { |
| .statement = parse_range_statement, |
| }; |
| |
| static struct symbol_op asm_op = { |
| .type = KW_ASM, |
| .declarator = parse_asm_declarator, |
| .statement = parse_asm_statement, |
| .toplevel = toplevel_asm_declaration, |
| }; |
| |
| static struct symbol_op packed_op = { |
| .attribute = attribute_packed, |
| }; |
| |
| static struct symbol_op aligned_op = { |
| .attribute = attribute_aligned, |
| }; |
| |
| static struct symbol_op attr_mod_op = { |
| .attribute = attribute_modifier, |
| }; |
| |
| static struct symbol_op attr_force_op = { |
| .attribute = attribute_force, |
| }; |
| |
| static struct symbol_op address_space_op = { |
| .attribute = attribute_address_space, |
| }; |
| |
| static struct symbol_op mode_op = { |
| .attribute = attribute_mode, |
| }; |
| |
| static struct symbol_op context_op = { |
| .attribute = attribute_context, |
| }; |
| |
| static struct symbol_op designated_init_op = { |
| .attribute = attribute_designated_init, |
| }; |
| |
| static struct symbol_op transparent_union_op = { |
| .attribute = attribute_transparent_union, |
| }; |
| |
| static struct symbol_op ignore_attr_op = { |
| .attribute = ignore_attribute, |
| }; |
| |
| static struct symbol_op mode_QI_op = { |
| .type = KW_MODE, |
| .to_mode = to_QI_mode |
| }; |
| |
| static struct symbol_op mode_HI_op = { |
| .type = KW_MODE, |
| .to_mode = to_HI_mode |
| }; |
| |
| static struct symbol_op mode_SI_op = { |
| .type = KW_MODE, |
| .to_mode = to_SI_mode |
| }; |
| |
| static struct symbol_op mode_DI_op = { |
| .type = KW_MODE, |
| .to_mode = to_DI_mode |
| }; |
| |
| static struct symbol_op mode_TI_op = { |
| .type = KW_MODE, |
| .to_mode = to_TI_mode |
| }; |
| |
| static struct symbol_op mode_word_op = { |
| .type = KW_MODE, |
| .to_mode = to_word_mode |
| }; |
| |
| static struct init_keyword { |
| const char *name; |
| enum namespace ns; |
| unsigned long modifiers; |
| struct symbol_op *op; |
| struct symbol *type; |
| } keyword_table[] = { |
| /* Type qualifiers */ |
| { "const", NS_TYPEDEF, .op = &const_op }, |
| { "__const", NS_TYPEDEF, .op = &const_op }, |
| { "__const__", NS_TYPEDEF, .op = &const_op }, |
| { "volatile", NS_TYPEDEF, .op = &volatile_op }, |
| { "__volatile", NS_TYPEDEF, .op = &volatile_op }, |
| { "__volatile__", NS_TYPEDEF, .op = &volatile_op }, |
| |
| /* Typedef.. */ |
| { "typedef", NS_TYPEDEF, .op = &typedef_op }, |
| |
| /* Type specifiers */ |
| { "void", NS_TYPEDEF, .type = &void_ctype, .op = &spec_op}, |
| { "char", NS_TYPEDEF, .op = &char_op }, |
| { "short", NS_TYPEDEF, .op = &short_op }, |
| { "int", NS_TYPEDEF, .op = &int_op }, |
| { "long", NS_TYPEDEF, .op = &long_op }, |
| { "float", NS_TYPEDEF, .op = &float_op }, |
| { "double", NS_TYPEDEF, .op = &double_op }, |
| { "signed", NS_TYPEDEF, .op = &signed_op }, |
| { "__signed", NS_TYPEDEF, .op = &signed_op }, |
| { "__signed__", NS_TYPEDEF, .op = &signed_op }, |
| { "unsigned", NS_TYPEDEF, .op = &unsigned_op }, |
| { "_Bool", NS_TYPEDEF, .type = &bool_ctype, .op = &spec_op }, |
| |
| /* Predeclared types */ |
| { "__builtin_va_list", NS_TYPEDEF, .type = &ptr_ctype, .op = &spec_op }, |
| { "__builtin_ms_va_list", NS_TYPEDEF, .type = &ptr_ctype, .op = &spec_op }, |
| { "__int128_t", NS_TYPEDEF, .type = &lllong_ctype, .op = &spec_op }, |
| { "__uint128_t",NS_TYPEDEF, .type = &ulllong_ctype, .op = &spec_op }, |
| |
| /* Extended types */ |
| { "typeof", NS_TYPEDEF, .op = &typeof_op }, |
| { "__typeof", NS_TYPEDEF, .op = &typeof_op }, |
| { "__typeof__", NS_TYPEDEF, .op = &typeof_op }, |
| |
| { "__attribute", NS_TYPEDEF, .op = &attribute_op }, |
| { "__attribute__", NS_TYPEDEF, .op = &attribute_op }, |
| |
| { "struct", NS_TYPEDEF, .op = &struct_op }, |
| { "union", NS_TYPEDEF, .op = &union_op }, |
| { "enum", NS_TYPEDEF, .op = &enum_op }, |
| |
| { "inline", NS_TYPEDEF, .op = &inline_op }, |
| { "__inline", NS_TYPEDEF, .op = &inline_op }, |
| { "__inline__", NS_TYPEDEF, .op = &inline_op }, |
| |
| /* Ignored for now.. */ |
| { "restrict", NS_TYPEDEF, .op = &restrict_op}, |
| { "__restrict", NS_TYPEDEF, .op = &restrict_op}, |
| |
| /* Storage class */ |
| { "auto", NS_TYPEDEF, .op = &auto_op }, |
| { "register", NS_TYPEDEF, .op = ®ister_op }, |
| { "static", NS_TYPEDEF, .op = &static_op }, |
| { "extern", NS_TYPEDEF, .op = &extern_op }, |
| { "__thread", NS_TYPEDEF, .op = &thread_op }, |
| |
| /* Statement */ |
| { "if", NS_KEYWORD, .op = &if_op }, |
| { "return", NS_KEYWORD, .op = &return_op }, |
| { "break", NS_KEYWORD, .op = &loop_iter_op }, |
| { "continue", NS_KEYWORD, .op = &loop_iter_op }, |
| { "default", NS_KEYWORD, .op = &default_op }, |
| { "case", NS_KEYWORD, .op = &case_op }, |
| { "switch", NS_KEYWORD, .op = &switch_op }, |
| { "for", NS_KEYWORD, .op = &for_op }, |
| { "while", NS_KEYWORD, .op = &while_op }, |
| { "do", NS_KEYWORD, .op = &do_op }, |
| { "goto", NS_KEYWORD, .op = &goto_op }, |
| { "__context__",NS_KEYWORD, .op = &__context___op }, |
| { "__range__", NS_KEYWORD, .op = &range_op }, |
| { "asm", NS_KEYWORD, .op = &asm_op }, |
| { "__asm", NS_KEYWORD, .op = &asm_op }, |
| { "__asm__", NS_KEYWORD, .op = &asm_op }, |
| |
| /* Attribute */ |
| { "packed", NS_KEYWORD, .op = &packed_op }, |
| { "__packed__", NS_KEYWORD, .op = &packed_op }, |
| { "aligned", NS_KEYWORD, .op = &aligned_op }, |
| { "__aligned__",NS_KEYWORD, .op = &aligned_op }, |
| { "nocast", NS_KEYWORD, MOD_NOCAST, .op = &attr_mod_op }, |
| { "noderef", NS_KEYWORD, MOD_NODEREF, .op = &attr_mod_op }, |
| { "safe", NS_KEYWORD, MOD_SAFE, .op = &attr_mod_op }, |
| { "force", NS_KEYWORD, .op = &attr_force_op }, |
| { "bitwise", NS_KEYWORD, MOD_BITWISE, .op = &attr_mod_op }, |
| { "__bitwise__",NS_KEYWORD, MOD_BITWISE, .op = &attr_mod_op }, |
| { "address_space",NS_KEYWORD, .op = &address_space_op }, |
| { "mode", NS_KEYWORD, .op = &mode_op }, |
| { "context", NS_KEYWORD, .op = &context_op }, |
| { "designated_init", NS_KEYWORD, .op = &designated_init_op }, |
| { "__transparent_union__", NS_KEYWORD, .op = &transparent_union_op }, |
| { "noreturn", NS_KEYWORD, MOD_NORETURN, .op = &attr_mod_op }, |
| { "__noreturn__", NS_KEYWORD, MOD_NORETURN, .op = &attr_mod_op }, |
| { "pure", NS_KEYWORD, MOD_PURE, .op = &attr_mod_op }, |
| {"__pure__", NS_KEYWORD, MOD_PURE, .op = &attr_mod_op }, |
| {"const", NS_KEYWORD, MOD_PURE, .op = &attr_mod_op }, |
| {"__const", NS_KEYWORD, MOD_PURE, .op = &attr_mod_op }, |
| {"__const__", NS_KEYWORD, MOD_PURE, .op = &attr_mod_op }, |
| |
| { "__mode__", NS_KEYWORD, .op = &mode_op }, |
| { "QI", NS_KEYWORD, MOD_CHAR, .op = &mode_QI_op }, |
| { "__QI__", NS_KEYWORD, MOD_CHAR, .op = &mode_QI_op }, |
| { "HI", NS_KEYWORD, MOD_SHORT, .op = &mode_HI_op }, |
| { "__HI__", NS_KEYWORD, MOD_SHORT, .op = &mode_HI_op }, |
| { "SI", NS_KEYWORD, .op = &mode_SI_op }, |
| { "__SI__", NS_KEYWORD, .op = &mode_SI_op }, |
| { "DI", NS_KEYWORD, MOD_LONGLONG, .op = &mode_DI_op }, |
| { "__DI__", NS_KEYWORD, MOD_LONGLONG, .op = &mode_DI_op }, |
| { "TI", NS_KEYWORD, MOD_LONGLONGLONG, .op = &mode_TI_op }, |
| { "__TI__", NS_KEYWORD, MOD_LONGLONGLONG, .op = &mode_TI_op }, |
| { "word", NS_KEYWORD, MOD_LONG, .op = &mode_word_op }, |
| { "__word__", NS_KEYWORD, MOD_LONG, .op = &mode_word_op }, |
| }; |
| |
| const char *ignored_attributes[] = { |
| "alias", |
| "__alias__", |
| "alloc_size", |
| "__alloc_size__", |
| "always_inline", |
| "__always_inline__", |
| "artificial", |
| "__artificial__", |
| "bounded", |
| "__bounded__", |
| "cdecl", |
| "__cdecl__", |
| "cold", |
| "__cold__", |
| "constructor", |
| "__constructor__", |
| "deprecated", |
| "__deprecated__", |
| "destructor", |
| "__destructor__", |
| "dllexport", |
| "__dllexport__", |
| "dllimport", |
| "__dllimport__", |
| "error", |
| "__error__", |
| "externally_visible", |
| "__externally_visible__", |
| "fastcall", |
| "__fastcall__", |
| "format", |
| "__format__", |
| "format_arg", |
| "__format_arg__", |
| "hot", |
| "__hot__", |
| "leaf", |
| "__leaf__", |
| "l1_text", |
| "__l1_text__", |
| "l1_data", |
| "__l1_data__", |
| "l2", |
| "__l2__", |
| "may_alias", |
| "__may_alias__", |
| "malloc", |
| "__malloc__", |
| "may_alias", |
| "__may_alias__", |
| "model", |
| "__model__", |
| "ms_abi", |
| "__ms_abi__", |
| "ms_hook_prologue", |
| "__ms_hook_prologue__", |
| "naked", |
| "__naked__", |
| "no_instrument_function", |
| "__no_instrument_function__", |
| "noclone", |
| "__noclone", |
| "__noclone__", |
| "noinline", |
| "__noinline__", |
| "nonnull", |
| "__nonnull", |
| "__nonnull__", |
| "nothrow", |
| "__nothrow", |
| "__nothrow__", |
| "regparm", |
| "__regparm__", |
| "section", |
| "__section__", |
| "sentinel", |
| "__sentinel__", |
| "signal", |
| "__signal__", |
| "stdcall", |
| "__stdcall__", |
| "syscall_linkage", |
| "__syscall_linkage__", |
| "sysv_abi", |
| "__sysv_abi__", |
| "unused", |
| "__unused__", |
| "used", |
| "__used__", |
| "vector_size", |
| "__vector_size__", |
| "visibility", |
| "__visibility__", |
| "warn_unused_result", |
| "__warn_unused_result__", |
| "warning", |
| "__warning__", |
| "weak", |
| "__weak__", |
| }; |
| |
| |
| void init_parser(int stream) |
| { |
| int i; |
| for (i = 0; i < ARRAY_SIZE(keyword_table); i++) { |
| struct init_keyword *ptr = keyword_table + i; |
| struct symbol *sym = create_symbol(stream, ptr->name, SYM_KEYWORD, ptr->ns); |
| sym->ident->keyword = 1; |
| if (ptr->ns == NS_TYPEDEF) |
| sym->ident->reserved = 1; |
| sym->ctype.modifiers = ptr->modifiers; |
| sym->ctype.base_type = ptr->type; |
| sym->op = ptr->op; |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(ignored_attributes); i++) { |
| const char * name = ignored_attributes[i]; |
| struct symbol *sym = create_symbol(stream, name, SYM_KEYWORD, |
| NS_KEYWORD); |
| sym->ident->keyword = 1; |
| sym->op = &ignore_attr_op; |
| } |
| } |
| |
| |
| // Add a symbol to the list of function-local symbols |
| static void fn_local_symbol(struct symbol *sym) |
| { |
| if (function_symbol_list) |
| add_symbol(function_symbol_list, sym); |
| } |
| |
| static int SENTINEL_ATTR match_idents(struct token *token, ...) |
| { |
| va_list args; |
| struct ident * next; |
| |
| if (token_type(token) != TOKEN_IDENT) |
| return 0; |
| |
| va_start(args, token); |
| do { |
| next = va_arg(args, struct ident *); |
| } while (next && token->ident != next); |
| va_end(args); |
| |
| return next && token->ident == next; |
| } |
| |
| |
| struct statement *alloc_statement(struct position pos, int type) |
| { |
| struct statement *stmt = __alloc_statement(0); |
| stmt->type = type; |
| stmt->pos = pos; |
| return stmt; |
| } |
| |
| static struct token *struct_declaration_list(struct token *token, struct symbol_list **list); |
| |
| static void apply_modifiers(struct position pos, struct decl_state *ctx) |
| { |
| struct symbol *ctype; |
| if (!ctx->mode) |
| return; |
| ctype = ctx->mode->to_mode(ctx->ctype.base_type); |
| if (!ctype) |
| sparse_error(pos, "don't know how to apply mode to %s", |
| show_typename(ctx->ctype.base_type)); |
| else |
| ctx->ctype.base_type = ctype; |
| |
| } |
| |
| static struct symbol * alloc_indirect_symbol(struct position pos, struct ctype *ctype, int type) |
| { |
| struct symbol *sym = alloc_symbol(pos, type); |
| |
| sym->ctype.base_type = ctype->base_type; |
| sym->ctype.modifiers = ctype->modifiers; |
| |
| ctype->base_type = sym; |
| ctype->modifiers = 0; |
| return sym; |
| } |
| |
| /* |
| * NOTE! NS_LABEL is not just a different namespace, |
| * it also ends up using function scope instead of the |
| * regular symbol scope. |
| */ |
| struct symbol *label_symbol(struct token *token) |
| { |
| struct symbol *sym = lookup_symbol(token->ident, NS_LABEL); |
| if (!sym) { |
| sym = alloc_symbol(token->pos, SYM_LABEL); |
| bind_symbol(sym, token->ident, NS_LABEL); |
| fn_local_symbol(sym); |
| } |
| return sym; |
| } |
| |
| static struct token *struct_union_enum_specifier(enum type type, |
| struct token *token, struct decl_state *ctx, |
| struct token *(*parse)(struct token *, struct symbol *)) |
| { |
| struct symbol *sym; |
| struct position *repos; |
| |
| token = handle_attributes(token, ctx, KW_ATTRIBUTE); |
| if (token_type(token) == TOKEN_IDENT) { |
| sym = lookup_symbol(token->ident, NS_STRUCT); |
| if (!sym || |
| (is_outer_scope(sym->scope) && |
| (match_op(token->next,';') || match_op(token->next,'{')))) { |
| // Either a new symbol, or else an out-of-scope |
| // symbol being redefined. |
| sym = alloc_symbol(token->pos, type); |
| bind_symbol(sym, token->ident, NS_STRUCT); |
| } |
| if (sym->type != type) |
| error_die(token->pos, "invalid tag applied to %s", show_typename (sym)); |
| ctx->ctype.base_type = sym; |
| repos = &token->pos; |
| token = token->next; |
| if (match_op(token, '{')) { |
| // The following test is actually wrong for empty |
| // structs, but (1) they are not C99, (2) gcc does |
| // the same thing, and (3) it's easier. |
| if (sym->symbol_list) |
| error_die(token->pos, "redefinition of %s", show_typename (sym)); |
| sym->pos = *repos; |
| token = parse(token->next, sym); |
| token = expect(token, '}', "at end of struct-union-enum-specifier"); |
| |
| // Mark the structure as needing re-examination |
| sym->examined = 0; |
| sym->endpos = token->pos; |
| } |
| return token; |
| } |
| |
| // private struct/union/enum type |
| if (!match_op(token, '{')) { |
| sparse_error(token->pos, "expected declaration"); |
| ctx->ctype.base_type = &bad_ctype; |
| return token; |
| } |
| |
| sym = alloc_symbol(token->pos, type); |
| token = parse(token->next, sym); |
| ctx->ctype.base_type = sym; |
| token = expect(token, '}', "at end of specifier"); |
| sym->endpos = token->pos; |
| |
| return token; |
| } |
| |
| static struct token *parse_struct_declaration(struct token *token, struct symbol *sym) |
| { |
| struct symbol *field, *last = NULL; |
| struct token *res; |
| res = struct_declaration_list(token, &sym->symbol_list); |
| FOR_EACH_PTR(sym->symbol_list, field) { |
| if (!field->ident) { |
| struct symbol *base = field->ctype.base_type; |
| if (base && base->type == SYM_BITFIELD) |
| continue; |
| } |
| if (last) |
| last->next_subobject = field; |
| last = field; |
| } END_FOR_EACH_PTR(field); |
| return res; |
| } |
| |
| static struct token *parse_union_declaration(struct token *token, struct symbol *sym) |
| { |
| return struct_declaration_list(token, &sym->symbol_list); |
| } |
| |
| static struct token *struct_specifier(struct token *token, struct decl_state *ctx) |
| { |
| return struct_union_enum_specifier(SYM_STRUCT, token, ctx, parse_struct_declaration); |
| } |
| |
| static struct token *union_specifier(struct token *token, struct decl_state *ctx) |
| { |
| return struct_union_enum_specifier(SYM_UNION, token, ctx, parse_union_declaration); |
| } |
| |
| |
| typedef struct { |
| int x; |
| unsigned long long y; |
| } Num; |
| |
| static void upper_boundary(Num *n, Num *v) |
| { |
| if (n->x > v->x) |
| return; |
| if (n->x < v->x) { |
| *n = *v; |
| return; |
| } |
| if (n->y < v->y) |
| n->y = v->y; |
| } |
| |
| static void lower_boundary(Num *n, Num *v) |
| { |
| if (n->x < v->x) |
| return; |
| if (n->x > v->x) { |
| *n = *v; |
| return; |
| } |
| if (n->y > v->y) |
| n->y = v->y; |
| } |
| |
| static int type_is_ok(struct symbol *type, Num *upper, Num *lower) |
| { |
| int shift = type->bit_size; |
| int is_unsigned = type->ctype.modifiers & MOD_UNSIGNED; |
| |
| if (!is_unsigned) |
| shift--; |
| if (upper->x == 0 && upper->y >> shift) |
| return 0; |
| if (lower->x == 0 || (!is_unsigned && (~lower->y >> shift) == 0)) |
| return 1; |
| return 0; |
| } |
| |
| static struct symbol *bigger_enum_type(struct symbol *s1, struct symbol *s2) |
| { |
| if (s1->bit_size < s2->bit_size) { |
| s1 = s2; |
| } else if (s1->bit_size == s2->bit_size) { |
| if (s2->ctype.modifiers & MOD_UNSIGNED) |
| s1 = s2; |
| } |
| if (s1->bit_size < bits_in_int) |
| return &int_ctype; |
| return s1; |
| } |
| |
| static void cast_enum_list(struct symbol_list *list, struct symbol *base_type) |
| { |
| struct symbol *sym; |
| |
| FOR_EACH_PTR(list, sym) { |
| struct expression *expr = sym->initializer; |
| struct symbol *ctype; |
| if (expr->type != EXPR_VALUE) |
| continue; |
| ctype = expr->ctype; |
| if (ctype->bit_size == base_type->bit_size) |
| continue; |
| cast_value(expr, base_type, expr, ctype); |
| } END_FOR_EACH_PTR(sym); |
| } |
| |
| static struct token *parse_enum_declaration(struct token *token, struct symbol *parent) |
| { |
| unsigned long long lastval = 0; |
| struct symbol *ctype = NULL, *base_type = NULL; |
| Num upper = {-1, 0}, lower = {1, 0}; |
| |
| parent->examined = 1; |
| parent->ctype.base_type = &int_ctype; |
| while (token_type(token) == TOKEN_IDENT) { |
| struct expression *expr = NULL; |
| struct token *next = token->next; |
| struct symbol *sym; |
| |
| if (match_op(next, '=')) { |
| next = constant_expression(next->next, &expr); |
| lastval = get_expression_value(expr); |
| ctype = &void_ctype; |
| if (expr && expr->ctype) |
| ctype = expr->ctype; |
| } else if (!ctype) { |
| ctype = &int_ctype; |
| } else if (is_int_type(ctype)) { |
| lastval++; |
| } else { |
| error_die(token->pos, "can't increment the last enum member"); |
| } |
| |
| if (!expr) { |
| expr = alloc_expression(token->pos, EXPR_VALUE); |
| expr->value = lastval; |
| expr->ctype = ctype; |
| } |
| |
| sym = alloc_symbol(token->pos, SYM_NODE); |
| bind_symbol(sym, token->ident, NS_SYMBOL); |
| sym->ctype.modifiers &= ~MOD_ADDRESSABLE; |
| sym->initializer = expr; |
| sym->enum_member = 1; |
| sym->ctype.base_type = parent; |
| add_ptr_list(&parent->symbol_list, sym); |
| |
| if (base_type != &bad_ctype) { |
| if (ctype->type == SYM_NODE) |
| ctype = ctype->ctype.base_type; |
| if (ctype->type == SYM_ENUM) { |
| if (ctype == parent) |
| ctype = base_type; |
| else |
| ctype = ctype->ctype.base_type; |
| } |
| /* |
| * base_type rules: |
| * - if all enums are of the same type, then |
| * the base_type is that type (two first |
| * cases) |
| * - if enums are of different types, they |
| * all have to be integer types, and the |
| * base type is at least "int_ctype". |
| * - otherwise the base_type is "bad_ctype". |
| */ |
| if (!base_type) { |
| base_type = ctype; |
| } else if (ctype == base_type) { |
| /* nothing */ |
| } else if (is_int_type(base_type) && is_int_type(ctype)) { |
| base_type = bigger_enum_type(base_type, ctype); |
| } else |
| base_type = &bad_ctype; |
| parent->ctype.base_type = base_type; |
| } |
| if (is_int_type(base_type)) { |
| Num v = {.y = lastval}; |
| if (ctype->ctype.modifiers & MOD_UNSIGNED) |
| v.x = 0; |
| else if ((long long)lastval >= 0) |
| v.x = 0; |
| else |
| v.x = -1; |
| upper_boundary(&upper, &v); |
| lower_boundary(&lower, &v); |
| } |
| token = next; |
| |
| sym->endpos = token->pos; |
| |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| if (!base_type) { |
| sparse_error(token->pos, "bad enum definition"); |
| base_type = &bad_ctype; |
| } |
| else if (!is_int_type(base_type)) |
| base_type = base_type; |
| else if (type_is_ok(base_type, &upper, &lower)) |
| base_type = base_type; |
| else if (type_is_ok(&int_ctype, &upper, &lower)) |
| base_type = &int_ctype; |
| else if (type_is_ok(&uint_ctype, &upper, &lower)) |
| base_type = &uint_ctype; |
| else if (type_is_ok(&long_ctype, &upper, &lower)) |
| base_type = &long_ctype; |
| else if (type_is_ok(&ulong_ctype, &upper, &lower)) |
| base_type = &ulong_ctype; |
| else if (type_is_ok(&llong_ctype, &upper, &lower)) |
| base_type = &llong_ctype; |
| else if (type_is_ok(&ullong_ctype, &upper, &lower)) |
| base_type = &ullong_ctype; |
| else |
| base_type = &bad_ctype; |
| parent->ctype.base_type = base_type; |
| parent->ctype.modifiers |= (base_type->ctype.modifiers & MOD_UNSIGNED); |
| parent->examined = 0; |
| |
| cast_enum_list(parent->symbol_list, base_type); |
| |
| return token; |
| } |
| |
| static struct token *enum_specifier(struct token *token, struct decl_state *ctx) |
| { |
| struct token *ret = struct_union_enum_specifier(SYM_ENUM, token, ctx, parse_enum_declaration); |
| struct ctype *ctype = &ctx->ctype.base_type->ctype; |
| |
| if (!ctype->base_type) |
| ctype->base_type = &incomplete_ctype; |
| |
| return ret; |
| } |
| |
| static void apply_ctype(struct position pos, struct ctype *thistype, struct ctype *ctype); |
| |
| static struct token *typeof_specifier(struct token *token, struct decl_state *ctx) |
| { |
| struct symbol *sym; |
| |
| if (!match_op(token, '(')) { |
| sparse_error(token->pos, "expected '(' after typeof"); |
| return token; |
| } |
| if (lookup_type(token->next)) { |
| token = typename(token->next, &sym, NULL); |
| ctx->ctype.base_type = sym->ctype.base_type; |
| apply_ctype(token->pos, &sym->ctype, &ctx->ctype); |
| } else { |
| struct symbol *typeof_sym = alloc_symbol(token->pos, SYM_TYPEOF); |
| token = parse_expression(token->next, &typeof_sym->initializer); |
| |
| typeof_sym->endpos = token->pos; |
| if (!typeof_sym->initializer) { |
| sparse_error(token->pos, "expected expression after the '(' token"); |
| typeof_sym = &bad_ctype; |
| } |
| ctx->ctype.base_type = typeof_sym; |
| } |
| return expect(token, ')', "after typeof"); |
| } |
| |
| static struct token *ignore_attribute(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| struct expression *expr = NULL; |
| if (match_op(token, '(')) |
| token = parens_expression(token, &expr, "in attribute"); |
| return token; |
| } |
| |
| static struct token *attribute_packed(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| if (!ctx->ctype.alignment) |
| ctx->ctype.alignment = 1; |
| return token; |
| } |
| |
| static struct token *attribute_aligned(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| int alignment = max_alignment; |
| struct expression *expr = NULL; |
| |
| if (match_op(token, '(')) { |
| token = parens_expression(token, &expr, "in attribute"); |
| if (expr) |
| alignment = const_expression_value(expr); |
| } |
| if (alignment & (alignment-1)) { |
| warning(token->pos, "I don't like non-power-of-2 alignments"); |
| return token; |
| } else if (alignment > ctx->ctype.alignment) |
| ctx->ctype.alignment = alignment; |
| return token; |
| } |
| |
| static void apply_qualifier(struct position *pos, struct ctype *ctx, unsigned long qual) |
| { |
| if (ctx->modifiers & qual) |
| warning(*pos, "duplicate %s", modifier_string(qual)); |
| ctx->modifiers |= qual; |
| } |
| |
| static struct token *attribute_modifier(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| apply_qualifier(&token->pos, &ctx->ctype, attr->ctype.modifiers); |
| return token; |
| } |
| |
| static struct token *attribute_address_space(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| struct expression *expr = NULL; |
| int as; |
| token = expect(token, '(', "after address_space attribute"); |
| token = conditional_expression(token, &expr); |
| if (expr) { |
| as = const_expression_value(expr); |
| if (Waddress_space && as) |
| ctx->ctype.as = as; |
| } |
| token = expect(token, ')', "after address_space attribute"); |
| return token; |
| } |
| |
| static struct symbol *to_QI_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| if (ctype == &char_ctype) |
| return ctype; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &uchar_ctype |
| : &schar_ctype; |
| } |
| |
| static struct symbol *to_HI_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &ushort_ctype |
| : &sshort_ctype; |
| } |
| |
| static struct symbol *to_SI_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &uint_ctype |
| : &sint_ctype; |
| } |
| |
| static struct symbol *to_DI_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &ullong_ctype |
| : &sllong_ctype; |
| } |
| |
| static struct symbol *to_TI_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &ulllong_ctype |
| : &slllong_ctype; |
| } |
| |
| static struct symbol *to_word_mode(struct symbol *ctype) |
| { |
| if (ctype->ctype.base_type != &int_type) |
| return NULL; |
| return ctype->ctype.modifiers & MOD_UNSIGNED ? &ulong_ctype |
| : &slong_ctype; |
| } |
| |
| static struct token *attribute_mode(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| token = expect(token, '(', "after mode attribute"); |
| if (token_type(token) == TOKEN_IDENT) { |
| struct symbol *mode = lookup_keyword(token->ident, NS_KEYWORD); |
| if (mode && mode->op->type == KW_MODE) |
| ctx->mode = mode->op; |
| else |
| sparse_error(token->pos, "unknown mode attribute %s\n", show_ident(token->ident)); |
| token = token->next; |
| } else |
| sparse_error(token->pos, "expect attribute mode symbol\n"); |
| token = expect(token, ')', "after mode attribute"); |
| return token; |
| } |
| |
| static struct token *attribute_context(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| struct context *context = alloc_context(); |
| struct expression *args[3]; |
| int argc = 0; |
| |
| token = expect(token, '(', "after context attribute"); |
| while (!match_op(token, ')')) { |
| struct expression *expr = NULL; |
| token = conditional_expression(token, &expr); |
| if (!expr) |
| break; |
| if (argc < 3) |
| args[argc++] = expr; |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| |
| switch(argc) { |
| case 0: |
| sparse_error(token->pos, "expected context input/output values"); |
| break; |
| case 1: |
| context->in = get_expression_value(args[0]); |
| break; |
| case 2: |
| context->in = get_expression_value(args[0]); |
| context->out = get_expression_value(args[1]); |
| break; |
| case 3: |
| context->context = args[0]; |
| context->in = get_expression_value(args[1]); |
| context->out = get_expression_value(args[2]); |
| break; |
| } |
| |
| if (argc) |
| add_ptr_list(&ctx->ctype.contexts, context); |
| |
| token = expect(token, ')', "after context attribute"); |
| return token; |
| } |
| |
| static struct token *attribute_designated_init(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| if (ctx->ctype.base_type && ctx->ctype.base_type->type == SYM_STRUCT) |
| ctx->ctype.base_type->designated_init = 1; |
| else |
| warning(token->pos, "attribute designated_init applied to non-structure type"); |
| return token; |
| } |
| |
| static struct token *attribute_transparent_union(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| if (Wtransparent_union) |
| warning(token->pos, "ignoring attribute __transparent_union__"); |
| return token; |
| } |
| |
| static struct token *recover_unknown_attribute(struct token *token) |
| { |
| struct expression *expr = NULL; |
| |
| sparse_error(token->pos, "attribute '%s': unknown attribute", show_ident(token->ident)); |
| token = token->next; |
| if (match_op(token, '(')) |
| token = parens_expression(token, &expr, "in attribute"); |
| return token; |
| } |
| |
| static struct token *attribute_specifier(struct token *token, struct decl_state *ctx) |
| { |
| token = expect(token, '(', "after attribute"); |
| token = expect(token, '(', "after attribute"); |
| |
| for (;;) { |
| struct ident *attribute_name; |
| struct symbol *attr; |
| |
| if (eof_token(token)) |
| break; |
| if (match_op(token, ';')) |
| break; |
| if (token_type(token) != TOKEN_IDENT) |
| break; |
| attribute_name = token->ident; |
| attr = lookup_keyword(attribute_name, NS_KEYWORD); |
| if (attr && attr->op->attribute) |
| token = attr->op->attribute(token->next, attr, ctx); |
| else |
| token = recover_unknown_attribute(token); |
| |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| |
| token = expect(token, ')', "after attribute"); |
| token = expect(token, ')', "after attribute"); |
| return token; |
| } |
| |
| static const char *storage_class[] = |
| { |
| [STypedef] = "typedef", |
| [SAuto] = "auto", |
| [SExtern] = "extern", |
| [SStatic] = "static", |
| [SRegister] = "register", |
| [SForced] = "[force]" |
| }; |
| |
| static unsigned long storage_modifiers(struct decl_state *ctx) |
| { |
| static unsigned long mod[] = |
| { |
| [SAuto] = MOD_AUTO, |
| [SExtern] = MOD_EXTERN, |
| [SStatic] = MOD_STATIC, |
| [SRegister] = MOD_REGISTER |
| }; |
| return mod[ctx->storage_class] | (ctx->is_inline ? MOD_INLINE : 0) |
| | (ctx->is_tls ? MOD_TLS : 0); |
| } |
| |
| static void set_storage_class(struct position *pos, struct decl_state *ctx, int class) |
| { |
| /* __thread can be used alone, or with extern or static */ |
| if (ctx->is_tls && (class != SStatic && class != SExtern)) { |
| sparse_error(*pos, "__thread can only be used alone, or with " |
| "extern or static"); |
| return; |
| } |
| |
| if (!ctx->storage_class) { |
| ctx->storage_class = class; |
| return; |
| } |
| if (ctx->storage_class == class) |
| sparse_error(*pos, "duplicate %s", storage_class[class]); |
| else |
| sparse_error(*pos, "multiple storage classes"); |
| } |
| |
| static struct token *typedef_specifier(struct token *next, struct decl_state *ctx) |
| { |
| set_storage_class(&next->pos, ctx, STypedef); |
| return next; |
| } |
| |
| static struct token *auto_specifier(struct token *next, struct decl_state *ctx) |
| { |
| set_storage_class(&next->pos, ctx, SAuto); |
| return next; |
| } |
| |
| static struct token *register_specifier(struct token *next, struct decl_state *ctx) |
| { |
| set_storage_class(&next->pos, ctx, SRegister); |
| return next; |
| } |
| |
| static struct token *static_specifier(struct token *next, struct decl_state *ctx) |
| { |
| set_storage_class(&next->pos, ctx, SStatic); |
| return next; |
| } |
| |
| static struct token *extern_specifier(struct token *next, struct decl_state *ctx) |
| { |
| set_storage_class(&next->pos, ctx, SExtern); |
| return next; |
| } |
| |
| static struct token *thread_specifier(struct token *next, struct decl_state *ctx) |
| { |
| /* This GCC extension can be used alone, or with extern or static */ |
| if (!ctx->storage_class || ctx->storage_class == SStatic |
| || ctx->storage_class == SExtern) { |
| ctx->is_tls = 1; |
| } else { |
| sparse_error(next->pos, "__thread can only be used alone, or " |
| "with extern or static"); |
| } |
| |
| return next; |
| } |
| |
| static struct token *attribute_force(struct token *token, struct symbol *attr, struct decl_state *ctx) |
| { |
| set_storage_class(&token->pos, ctx, SForced); |
| return token; |
| } |
| |
| static struct token *inline_specifier(struct token *next, struct decl_state *ctx) |
| { |
| ctx->is_inline = 1; |
| return next; |
| } |
| |
| static struct token *const_qualifier(struct token *next, struct decl_state *ctx) |
| { |
| apply_qualifier(&next->pos, &ctx->ctype, MOD_CONST); |
| return next; |
| } |
| |
| static struct token *volatile_qualifier(struct token *next, struct decl_state *ctx) |
| { |
| apply_qualifier(&next->pos, &ctx->ctype, MOD_VOLATILE); |
| return next; |
| } |
| |
| static void apply_ctype(struct position pos, struct ctype *thistype, struct ctype *ctype) |
| { |
| unsigned long mod = thistype->modifiers; |
| |
| if (mod) |
| apply_qualifier(&pos, ctype, mod); |
| |
| /* Context */ |
| concat_ptr_list((struct ptr_list *)thistype->contexts, |
| (struct ptr_list **)&ctype->contexts); |
| |
| /* Alignment */ |
| if (thistype->alignment > ctype->alignment) |
| ctype->alignment = thistype->alignment; |
| |
| /* Address space */ |
| if (thistype->as) |
| ctype->as = thistype->as; |
| } |
| |
| static void specifier_conflict(struct position pos, int what, struct ident *new) |
| { |
| const char *old; |
| if (what & (Set_S | Set_T)) |
| goto Catch_all; |
| if (what & Set_Char) |
| old = "char"; |
| else if (what & Set_Double) |
| old = "double"; |
| else if (what & Set_Float) |
| old = "float"; |
| else if (what & Set_Signed) |
| old = "signed"; |
| else if (what & Set_Unsigned) |
| old = "unsigned"; |
| else if (what & Set_Short) |
| old = "short"; |
| else if (what & Set_Long) |
| old = "long"; |
| else |
| old = "long long"; |
| sparse_error(pos, "impossible combination of type specifiers: %s %s", |
| old, show_ident(new)); |
| return; |
| |
| Catch_all: |
| sparse_error(pos, "two or more data types in declaration specifiers"); |
| } |
| |
| static struct symbol * const int_types[] = |
| {&short_ctype, &int_ctype, &long_ctype, &llong_ctype}; |
| static struct symbol * const signed_types[] = |
| {&sshort_ctype, &sint_ctype, &slong_ctype, &sllong_ctype, |
| &slllong_ctype}; |
| static struct symbol * const unsigned_types[] = |
| {&ushort_ctype, &uint_ctype, &ulong_ctype, &ullong_ctype, |
| &ulllong_ctype}; |
| static struct symbol * const real_types[] = |
| {&float_ctype, &double_ctype, &ldouble_ctype}; |
| static struct symbol * const char_types[] = |
| {&char_ctype, &schar_ctype, &uchar_ctype}; |
| static struct symbol * const * const types[] = { |
| int_types + 1, signed_types + 1, unsigned_types + 1, |
| real_types + 1, char_types, char_types + 1, char_types + 2 |
| }; |
| |
| struct symbol *ctype_integer(int size, int want_unsigned) |
| { |
| return types[want_unsigned ? CUInt : CInt][size]; |
| } |
| |
| static struct token *handle_qualifiers(struct token *t, struct decl_state *ctx) |
| { |
| while (token_type(t) == TOKEN_IDENT) { |
| struct symbol *s = lookup_symbol(t->ident, NS_TYPEDEF); |
| if (!s) |
| break; |
| if (s->type != SYM_KEYWORD) |
| break; |
| if (!(s->op->type & (KW_ATTRIBUTE | KW_QUALIFIER))) |
| break; |
| t = t->next; |
| if (s->op->declarator) |
| t = s->op->declarator(t, ctx); |
| } |
| return t; |
| } |
| |
| static struct token *declaration_specifiers(struct token *token, struct decl_state *ctx) |
| { |
| int seen = 0; |
| int class = CInt; |
| int size = 0; |
| |
| while (token_type(token) == TOKEN_IDENT) { |
| struct symbol *s = lookup_symbol(token->ident, |
| NS_TYPEDEF | NS_SYMBOL); |
| if (!s || !(s->namespace & NS_TYPEDEF)) |
| break; |
| if (s->type != SYM_KEYWORD) { |
| if (seen & Set_Any) |
| break; |
| seen |= Set_S | Set_T; |
| ctx->ctype.base_type = s->ctype.base_type; |
| apply_ctype(token->pos, &s->ctype, &ctx->ctype); |
| token = token->next; |
| continue; |
| } |
| if (s->op->type & KW_SPECIFIER) { |
| if (seen & s->op->test) { |
| specifier_conflict(token->pos, |
| seen & s->op->test, |
| token->ident); |
| break; |
| } |
| seen |= s->op->set; |
| class += s->op->class; |
| if (s->op->type & KW_SHORT) { |
| size = -1; |
| } else if (s->op->type & KW_LONG && size++) { |
| if (class == CReal) { |
| specifier_conflict(token->pos, |
| Set_Vlong, |
| &double_ident); |
| break; |
| } |
| seen |= Set_Vlong; |
| } |
| } |
| token = token->next; |
| if (s->op->declarator) |
| token = s->op->declarator(token, ctx); |
| if (s->op->type & KW_EXACT) { |
| ctx->ctype.base_type = s->ctype.base_type; |
| ctx->ctype.modifiers |= s->ctype.modifiers; |
| } |
| } |
| |
| if (!(seen & Set_S)) { /* not set explicitly? */ |
| struct symbol *base = &incomplete_ctype; |
| if (seen & Set_Any) |
| base = types[class][size]; |
| ctx->ctype.base_type = base; |
| } |
| |
| if (ctx->ctype.modifiers & MOD_BITWISE) { |
| struct symbol *type; |
| ctx->ctype.modifiers &= ~MOD_BITWISE; |
| if (!is_int_type(ctx->ctype.base_type)) { |
| sparse_error(token->pos, "invalid modifier"); |
| return token; |
| } |
| type = alloc_symbol(token->pos, SYM_BASETYPE); |
| *type = *ctx->ctype.base_type; |
| type->ctype.modifiers &= ~MOD_SPECIFIER; |
| type->ctype.base_type = ctx->ctype.base_type; |
| type->type = SYM_RESTRICT; |
| ctx->ctype.base_type = type; |
| create_fouled(type); |
| } |
| return token; |
| } |
| |
| static struct token *abstract_array_declarator(struct token *token, struct symbol *sym) |
| { |
| struct expression *expr = NULL; |
| |
| if (match_idents(token, &restrict_ident, &__restrict_ident, NULL)) |
| token = token->next; |
| token = parse_expression(token, &expr); |
| sym->array_size = expr; |
| return token; |
| } |
| |
| static struct token *parameter_type_list(struct token *, struct symbol *); |
| static struct token *identifier_list(struct token *, struct symbol *); |
| static struct token *declarator(struct token *token, struct decl_state *ctx); |
| |
| static struct token *skip_attribute(struct token *token) |
| { |
| token = token->next; |
| if (match_op(token, '(')) { |
| int depth = 1; |
| token = token->next; |
| while (depth && !eof_token(token)) { |
| if (token_type(token) == TOKEN_SPECIAL) { |
| if (token->special == '(') |
| depth++; |
| else if (token->special == ')') |
| depth--; |
| } |
| token = token->next; |
| } |
| } |
| return token; |
| } |
| |
| static struct token *skip_attributes(struct token *token) |
| { |
| struct symbol *keyword; |
| for (;;) { |
| if (token_type(token) != TOKEN_IDENT) |
| break; |
| keyword = lookup_keyword(token->ident, NS_KEYWORD | NS_TYPEDEF); |
| if (!keyword || keyword->type != SYM_KEYWORD) |
| break; |
| if (!(keyword->op->type & KW_ATTRIBUTE)) |
| break; |
| token = expect(token->next, '(', "after attribute"); |
| token = expect(token, '(', "after attribute"); |
| for (;;) { |
| if (eof_token(token)) |
| break; |
| if (match_op(token, ';')) |
| break; |
| if (token_type(token) != TOKEN_IDENT) |
| break; |
| token = skip_attribute(token); |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| token = expect(token, ')', "after attribute"); |
| token = expect(token, ')', "after attribute"); |
| } |
| return token; |
| } |
| |
| static struct token *handle_attributes(struct token *token, struct decl_state *ctx, unsigned int keywords) |
| { |
| struct symbol *keyword; |
| for (;;) { |
| if (token_type(token) != TOKEN_IDENT) |
| break; |
| keyword = lookup_keyword(token->ident, NS_KEYWORD | NS_TYPEDEF); |
| if (!keyword || keyword->type != SYM_KEYWORD) |
| break; |
| if (!(keyword->op->type & keywords)) |
| break; |
| token = keyword->op->declarator(token->next, ctx); |
| keywords &= KW_ATTRIBUTE; |
| } |
| return token; |
| } |
| |
| static int is_nested(struct token *token, struct token **p, |
| int prefer_abstract) |
| { |
| /* |
| * This can be either a parameter list or a grouping. |
| * For the direct (non-abstract) case, we know if must be |
| * a parameter list if we already saw the identifier. |
| * For the abstract case, we know if must be a parameter |
| * list if it is empty or starts with a type. |
| */ |
| struct token *next = token->next; |
| |
| *p = next = skip_attributes(next); |
| |
| if (token_type(next) == TOKEN_IDENT) { |
| if (lookup_type(next)) |
| return !prefer_abstract; |
| return 1; |
| } |
| |
| if (match_op(next, ')') || match_op(next, SPECIAL_ELLIPSIS)) |
| return 0; |
| |
| return 1; |
| } |
| |
| enum kind { |
| Empty, K_R, Proto, Bad_Func, |
| }; |
| |
| static enum kind which_func(struct token *token, |
| struct ident **n, |
| int prefer_abstract) |
| { |
| struct token *next = token->next; |
| |
| if (token_type(next) == TOKEN_IDENT) { |
| if (lookup_type(next)) |
| return Proto; |
| /* identifier list not in definition; complain */ |
| if (prefer_abstract) |
| warning(token->pos, |
| "identifier list not in definition"); |
| return K_R; |
| } |
| |
| if (token_type(next) != TOKEN_SPECIAL) |
| return Bad_Func; |
| |
| if (next->special == ')') { |
| /* don't complain about those */ |
| if (!n || match_op(next->next, ';')) |
| return Empty; |
| warning(next->pos, |
| "non-ANSI function declaration of function '%s'", |
| show_ident(*n)); |
| return Empty; |
| } |
| |
| if (next->special == SPECIAL_ELLIPSIS) { |
| warning(next->pos, |
| "variadic functions must have one named argument"); |
| return Proto; |
| } |
| |
| return Bad_Func; |
| } |
| |
| static struct token *direct_declarator(struct token *token, struct decl_state *ctx) |
| { |
| struct ctype *ctype = &ctx->ctype; |
| struct token *next; |
| struct ident **p = ctx->ident; |
| |
| if (ctx->ident && token_type(token) == TOKEN_IDENT) { |
| *ctx->ident = token->ident; |
| token = token->next; |
| } else if (match_op(token, '(') && |
| is_nested(token, &next, ctx->prefer_abstract)) { |
| struct symbol *base_type = ctype->base_type; |
| if (token->next != next) |
| next = handle_attributes(token->next, ctx, |
| KW_ATTRIBUTE); |
| token = declarator(next, ctx); |
| token = expect(token, ')', "in nested declarator"); |
| while (ctype->base_type != base_type) |
| ctype = &ctype->base_type->ctype; |
| p = NULL; |
| } |
| |
| if (match_op(token, '(')) { |
| enum kind kind = which_func(token, p, ctx->prefer_abstract); |
| struct symbol *fn; |
| fn = alloc_indirect_symbol(token->pos, ctype, SYM_FN); |
| token = token->next; |
| if (kind == K_R) |
| token = identifier_list(token, fn); |
| else if (kind == Proto) |
| token = parameter_type_list(token, fn); |
| token = expect(token, ')', "in function declarator"); |
| fn->endpos = token->pos; |
| return token; |
| } |
| |
| while (match_op(token, '[')) { |
| struct symbol *array; |
| array = alloc_indirect_symbol(token->pos, ctype, SYM_ARRAY); |
| token = abstract_array_declarator(token->next, array); |
| token = expect(token, ']', "in abstract_array_declarator"); |
| array->endpos = token->pos; |
| ctype = &array->ctype; |
| } |
| return token; |
| } |
| |
| static struct token *pointer(struct token *token, struct decl_state *ctx) |
| { |
| while (match_op(token,'*')) { |
| struct symbol *ptr = alloc_symbol(token->pos, SYM_PTR); |
| ptr->ctype.modifiers = ctx->ctype.modifiers; |
| ptr->ctype.base_type = ctx->ctype.base_type; |
| ptr->ctype.as = ctx->ctype.as; |
| ptr->ctype.contexts = ctx->ctype.contexts; |
| ctx->ctype.modifiers = 0; |
| ctx->ctype.base_type = ptr; |
| ctx->ctype.as = 0; |
| ctx->ctype.contexts = NULL; |
| ctx->ctype.alignment = 0; |
| |
| token = handle_qualifiers(token->next, ctx); |
| ctx->ctype.base_type->endpos = token->pos; |
| } |
| return token; |
| } |
| |
| static struct token *declarator(struct token *token, struct decl_state *ctx) |
| { |
| token = pointer(token, ctx); |
| return direct_declarator(token, ctx); |
| } |
| |
| static struct token *handle_bitfield(struct token *token, struct decl_state *ctx) |
| { |
| struct ctype *ctype = &ctx->ctype; |
| struct expression *expr; |
| struct symbol *bitfield; |
| long long width; |
| |
| if (ctype->base_type != &int_type && !is_int_type(ctype->base_type)) { |
| sparse_error(token->pos, "invalid bitfield specifier for type %s.", |
| show_typename(ctype->base_type)); |
| // Parse this to recover gracefully. |
| return conditional_expression(token->next, &expr); |
| } |
| |
| bitfield = alloc_indirect_symbol(token->pos, ctype, SYM_BITFIELD); |
| token = conditional_expression(token->next, &expr); |
| width = const_expression_value(expr); |
| bitfield->bit_size = width; |
| |
| if (width < 0 || width > INT_MAX) { |
| sparse_error(token->pos, "invalid bitfield width, %lld.", width); |
| width = -1; |
| } else if (*ctx->ident && width == 0) { |
| sparse_error(token->pos, "invalid named zero-width bitfield `%s'", |
| show_ident(*ctx->ident)); |
| width = -1; |
| } else if (*ctx->ident) { |
| struct symbol *base_type = bitfield->ctype.base_type; |
| struct symbol *bitfield_type = base_type == &int_type ? bitfield : base_type; |
| int is_signed = !(bitfield_type->ctype.modifiers & MOD_UNSIGNED); |
| if (Wone_bit_signed_bitfield && width == 1 && is_signed) { |
| // Valid values are either {-1;0} or {0}, depending on integer |
| // representation. The latter makes for very efficient code... |
| sparse_error(token->pos, "dubious one-bit signed bitfield"); |
| } |
| if (Wdefault_bitfield_sign && |
| bitfield_type->type != SYM_ENUM && |
| !(bitfield_type->ctype.modifiers & MOD_EXPLICITLY_SIGNED) && |
| is_signed) { |
| // The sign of bitfields is unspecified by default. |
| warning(token->pos, "dubious bitfield without explicit `signed' or `unsigned'"); |
| } |
| } |
| bitfield->bit_size = width; |
| bitfield->endpos = token->pos; |
| return token; |
| } |
| |
| static struct token *declaration_list(struct token *token, struct symbol_list **list) |
| { |
| struct decl_state ctx = {.prefer_abstract = 0}; |
| struct ctype saved; |
| unsigned long mod; |
| |
| token = declaration_specifiers(token, &ctx); |
| mod = storage_modifiers(&ctx); |
| saved = ctx.ctype; |
| for (;;) { |
| struct symbol *decl = alloc_symbol(token->pos, SYM_NODE); |
| ctx.ident = &decl->ident; |
| |
| token = declarator(token, &ctx); |
| if (match_op(token, ':')) |
| token = handle_bitfield(token, &ctx); |
| |
| token = handle_attributes(token, &ctx, KW_ATTRIBUTE); |
| apply_modifiers(token->pos, &ctx); |
| |
| decl->ctype = ctx.ctype; |
| decl->ctype.modifiers |= mod; |
| decl->endpos = token->pos; |
| add_symbol(list, decl); |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| ctx.ctype = saved; |
| } |
| return token; |
| } |
| |
| static struct token *struct_declaration_list(struct token *token, struct symbol_list **list) |
| { |
| while (!match_op(token, '}')) { |
| if (!match_op(token, ';')) |
| token = declaration_list(token, list); |
| if (!match_op(token, ';')) { |
| sparse_error(token->pos, "expected ; at end of declaration"); |
| break; |
| } |
| token = token->next; |
| } |
| return token; |
| } |
| |
| static struct token *parameter_declaration(struct token *token, struct symbol *sym) |
| { |
| struct decl_state ctx = {.prefer_abstract = 1}; |
| |
| token = declaration_specifiers(token, &ctx); |
| ctx.ident = &sym->ident; |
| token = declarator(token, &ctx); |
| token = handle_attributes(token, &ctx, KW_ATTRIBUTE); |
| apply_modifiers(token->pos, &ctx); |
| sym->ctype = ctx.ctype; |
| sym->ctype.modifiers |= storage_modifiers(&ctx); |
| sym->endpos = token->pos; |
| sym->forced_arg = ctx.storage_class == SForced; |
| return token; |
| } |
| |
| struct token *typename(struct token *token, struct symbol **p, int *forced) |
| { |
| struct decl_state ctx = {.prefer_abstract = 1}; |
| int class; |
| struct symbol *sym = alloc_symbol(token->pos, SYM_NODE); |
| *p = sym; |
| token = declaration_specifiers(token, &ctx); |
| token = declarator(token, &ctx); |
| apply_modifiers(token->pos, &ctx); |
| sym->ctype = ctx.ctype; |
| sym->endpos = token->pos; |
| class = ctx.storage_class; |
| if (forced) { |
| *forced = 0; |
| if (class == SForced) { |
| *forced = 1; |
| class = 0; |
| } |
| } |
| if (class) |
| warning(sym->pos, "storage class in typename (%s %s)", |
| storage_class[class], show_typename(sym)); |
| return token; |
| } |
| |
| static struct token *expression_statement(struct token *token, struct expression **tree) |
| { |
| token = parse_expression(token, tree); |
| return expect(token, ';', "at end of statement"); |
| } |
| |
| static struct token *parse_asm_operands(struct token *token, struct statement *stmt, |
| struct expression_list **inout) |
| { |
| struct expression *expr; |
| |
| /* Allow empty operands */ |
| if (match_op(token->next, ':') || match_op(token->next, ')')) |
| return token->next; |
| do { |
| struct ident *ident = NULL; |
| if (match_op(token->next, '[') && |
| token_type(token->next->next) == TOKEN_IDENT && |
| match_op(token->next->next->next, ']')) { |
| ident = token->next->next->ident; |
| token = token->next->next->next; |
| } |
| add_expression(inout, (struct expression *)ident); /* UGGLEE!!! */ |
| token = primary_expression(token->next, &expr); |
| add_expression(inout, expr); |
| token = parens_expression(token, &expr, "in asm parameter"); |
| add_expression(inout, expr); |
| } while (match_op(token, ',')); |
| return token; |
| } |
| |
| static struct token *parse_asm_clobbers(struct token *token, struct statement *stmt, |
| struct expression_list **clobbers) |
| { |
| struct expression *expr; |
| |
| do { |
| token = primary_expression(token->next, &expr); |
| if (expr) |
| add_expression(clobbers, expr); |
| } while (match_op(token, ',')); |
| return token; |
| } |
| |
| static struct token *parse_asm_labels(struct token *token, struct statement *stmt, |
| struct symbol_list **labels) |
| { |
| struct symbol *label; |
| |
| do { |
| token = token->next; /* skip ':' and ',' */ |
| if (token_type(token) != TOKEN_IDENT) |
| return token; |
| label = label_symbol(token); |
| add_symbol(labels, label); |
| token = token->next; |
| } while (match_op(token, ',')); |
| return token; |
| } |
| |
| static struct token *parse_asm_statement(struct token *token, struct statement *stmt) |
| { |
| int is_goto = 0; |
| |
| token = token->next; |
| stmt->type = STMT_ASM; |
| if (match_idents(token, &__volatile___ident, &__volatile_ident, &volatile_ident, NULL)) { |
| token = token->next; |
| } |
| if (token_type(token) == TOKEN_IDENT && token->ident == &goto_ident) { |
| is_goto = 1; |
| token = token->next; |
| } |
| token = expect(token, '(', "after asm"); |
| token = parse_expression(token, &stmt->asm_string); |
| if (match_op(token, ':')) |
| token = parse_asm_operands(token, stmt, &stmt->asm_outputs); |
| if (match_op(token, ':')) |
| token = parse_asm_operands(token, stmt, &stmt->asm_inputs); |
| if (match_op(token, ':')) |
| token = parse_asm_clobbers(token, stmt, &stmt->asm_clobbers); |
| if (is_goto && match_op(token, ':')) |
| token = parse_asm_labels(token, stmt, &stmt->asm_labels); |
| token = expect(token, ')', "after asm"); |
| return expect(token, ';', "at end of asm-statement"); |
| } |
| |
| static struct token *parse_asm_declarator(struct token *token, struct decl_state *ctx) |
| { |
| struct expression *expr; |
| token = expect(token, '(', "after asm"); |
| token = parse_expression(token->next, &expr); |
| token = expect(token, ')', "after asm"); |
| return token; |
| } |
| |
| /* Make a statement out of an expression */ |
| static struct statement *make_statement(struct expression *expr) |
| { |
| struct statement *stmt; |
| |
| if (!expr) |
| return NULL; |
| stmt = alloc_statement(expr->pos, STMT_EXPRESSION); |
| stmt->expression = expr; |
| return stmt; |
| } |
| |
| /* |
| * All iterators have two symbols associated with them: |
| * the "continue" and "break" symbols, which are targets |
| * for continue and break statements respectively. |
| * |
| * They are in a special name-space, but they follow |
| * all the normal visibility rules, so nested iterators |
| * automatically work right. |
| */ |
| static void start_iterator(struct statement *stmt) |
| { |
| struct symbol *cont, *brk; |
| |
| start_symbol_scope(); |
| cont = alloc_symbol(stmt->pos, SYM_NODE); |
| bind_symbol(cont, &continue_ident, NS_ITERATOR); |
| brk = alloc_symbol(stmt->pos, SYM_NODE); |
| bind_symbol(brk, &break_ident, NS_ITERATOR); |
| |
| stmt->type = STMT_ITERATOR; |
| stmt->iterator_break = brk; |
| stmt->iterator_continue = cont; |
| fn_local_symbol(brk); |
| fn_local_symbol(cont); |
| } |
| |
| static void end_iterator(struct statement *stmt) |
| { |
| end_symbol_scope(); |
| } |
| |
| static struct statement *start_function(struct symbol *sym) |
| { |
| struct symbol *ret; |
| struct statement *stmt = alloc_statement(sym->pos, STMT_COMPOUND); |
| |
| start_function_scope(); |
| ret = alloc_symbol(sym->pos, SYM_NODE); |
| ret->ctype = sym->ctype.base_type->ctype; |
| ret->ctype.modifiers &= ~(MOD_STORAGE | MOD_CONST | MOD_VOLATILE | MOD_TLS | MOD_INLINE | MOD_ADDRESSABLE | MOD_NOCAST | MOD_NODEREF | MOD_ACCESSED | MOD_TOPLEVEL); |
| ret->ctype.modifiers |= (MOD_AUTO | MOD_REGISTER); |
| bind_symbol(ret, &return_ident, NS_ITERATOR); |
| stmt->ret = ret; |
| fn_local_symbol(ret); |
| |
| // Currently parsed symbol for __func__/__FUNCTION__/__PRETTY_FUNCTION__ |
| current_fn = sym; |
| |
| return stmt; |
| } |
| |
| static void end_function(struct symbol *sym) |
| { |
| current_fn = NULL; |
| end_function_scope(); |
| } |
| |
| /* |
| * A "switch()" statement, like an iterator, has a |
| * the "break" symbol associated with it. It works |
| * exactly like the iterator break - it's the target |
| * for any break-statements in scope, and means that |
| * "break" handling doesn't even need to know whether |
| * it's breaking out of an iterator or a switch. |
| * |
| * In addition, the "case" symbol is a marker for the |
| * case/default statements to find the switch statement |
| * that they are associated with. |
| */ |
| static void start_switch(struct statement *stmt) |
| { |
| struct symbol *brk, *switch_case; |
| |
| start_symbol_scope(); |
| brk = alloc_symbol(stmt->pos, SYM_NODE); |
| bind_symbol(brk, &break_ident, NS_ITERATOR); |
| |
| switch_case = alloc_symbol(stmt->pos, SYM_NODE); |
| bind_symbol(switch_case, &case_ident, NS_ITERATOR); |
| switch_case->stmt = stmt; |
| |
| stmt->type = STMT_SWITCH; |
| stmt->switch_break = brk; |
| stmt->switch_case = switch_case; |
| |
| fn_local_symbol(brk); |
| fn_local_symbol(switch_case); |
| } |
| |
| static void end_switch(struct statement *stmt) |
| { |
| if (!stmt->switch_case->symbol_list) |
| warning(stmt->pos, "switch with no cases"); |
| end_symbol_scope(); |
| } |
| |
| static void add_case_statement(struct statement *stmt) |
| { |
| struct symbol *target = lookup_symbol(&case_ident, NS_ITERATOR); |
| struct symbol *sym; |
| |
| if (!target) { |
| sparse_error(stmt->pos, "not in switch scope"); |
| stmt->type = STMT_NONE; |
| return; |
| } |
| sym = alloc_symbol(stmt->pos, SYM_NODE); |
| add_symbol(&target->symbol_list, sym); |
| sym->stmt = stmt; |
| stmt->case_label = sym; |
| fn_local_symbol(sym); |
| } |
| |
| static struct token *parse_return_statement(struct token *token, struct statement *stmt) |
| { |
| struct symbol *target = lookup_symbol(&return_ident, NS_ITERATOR); |
| |
| if (!target) |
| error_die(token->pos, "internal error: return without a function target"); |
| stmt->type = STMT_RETURN; |
| stmt->ret_target = target; |
| return expression_statement(token->next, &stmt->ret_value); |
| } |
| |
| static struct token *parse_for_statement(struct token *token, struct statement *stmt) |
| { |
| struct symbol_list *syms; |
| struct expression *e1, *e2, *e3; |
| struct statement *iterator; |
| |
| start_iterator(stmt); |
| token = expect(token->next, '(', "after 'for'"); |
| |
| syms = NULL; |
| e1 = NULL; |
| /* C99 variable declaration? */ |
| if (lookup_type(token)) { |
| token = external_declaration(token, &syms); |
| } else { |
| token = parse_expression(token, &e1); |
| token = expect(token, ';', "in 'for'"); |
| } |
| token = parse_expression(token, &e2); |
| token = expect(token, ';', "in 'for'"); |
| token = parse_expression(token, &e3); |
| token = expect(token, ')', "in 'for'"); |
| token = statement(token, &iterator); |
| |
| stmt->iterator_syms = syms; |
| stmt->iterator_pre_statement = make_statement(e1); |
| stmt->iterator_pre_condition = e2; |
| stmt->iterator_post_statement = make_statement(e3); |
| stmt->iterator_post_condition = NULL; |
| stmt->iterator_statement = iterator; |
| end_iterator(stmt); |
| |
| return token; |
| } |
| |
| static struct token *parse_while_statement(struct token *token, struct statement *stmt) |
| { |
| struct expression *expr; |
| struct statement *iterator; |
| |
| start_iterator(stmt); |
| token = parens_expression(token->next, &expr, "after 'while'"); |
| token = statement(token, &iterator); |
| |
| stmt->iterator_pre_condition = expr; |
| stmt->iterator_post_condition = NULL; |
| stmt->iterator_statement = iterator; |
| end_iterator(stmt); |
| |
| return token; |
| } |
| |
| static struct token *parse_do_statement(struct token *token, struct statement *stmt) |
| { |
| struct expression *expr; |
| struct statement *iterator; |
| |
| start_iterator(stmt); |
| token = statement(token->next, &iterator); |
| if (token_type(token) == TOKEN_IDENT && token->ident == &while_ident) |
| token = token->next; |
| else |
| sparse_error(token->pos, "expected 'while' after 'do'"); |
| token = parens_expression(token, &expr, "after 'do-while'"); |
| |
| stmt->iterator_post_condition = expr; |
| stmt->iterator_statement = iterator; |
| end_iterator(stmt); |
| |
| if (iterator && iterator->type != STMT_COMPOUND && Wdo_while) |
| warning(iterator->pos, "do-while statement is not a compound statement"); |
| |
| return expect(token, ';', "after statement"); |
| } |
| |
| static struct token *parse_if_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_IF; |
| token = parens_expression(token->next, &stmt->if_conditional, "after if"); |
| token = statement(token, &stmt->if_true); |
| if (token_type(token) != TOKEN_IDENT) |
| return token; |
| if (token->ident != &else_ident) |
| return token; |
| return statement(token->next, &stmt->if_false); |
| } |
| |
| static inline struct token *case_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_CASE; |
| token = expect(token, ':', "after default/case"); |
| add_case_statement(stmt); |
| return statement(token, &stmt->case_statement); |
| } |
| |
| static struct token *parse_case_statement(struct token *token, struct statement *stmt) |
| { |
| token = parse_expression(token->next, &stmt->case_expression); |
| if (match_op(token, SPECIAL_ELLIPSIS)) |
| token = parse_expression(token->next, &stmt->case_to); |
| return case_statement(token, stmt); |
| } |
| |
| static struct token *parse_default_statement(struct token *token, struct statement *stmt) |
| { |
| return case_statement(token->next, stmt); |
| } |
| |
| static struct token *parse_loop_iterator(struct token *token, struct statement *stmt) |
| { |
| struct symbol *target = lookup_symbol(token->ident, NS_ITERATOR); |
| stmt->type = STMT_GOTO; |
| stmt->goto_label = target; |
| if (!target) |
| sparse_error(stmt->pos, "break/continue not in iterator scope"); |
| return expect(token->next, ';', "at end of statement"); |
| } |
| |
| static struct token *parse_switch_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_SWITCH; |
| start_switch(stmt); |
| token = parens_expression(token->next, &stmt->switch_expression, "after 'switch'"); |
| token = statement(token, &stmt->switch_statement); |
| end_switch(stmt); |
| return token; |
| } |
| |
| static struct token *parse_goto_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_GOTO; |
| token = token->next; |
| if (match_op(token, '*')) { |
| token = parse_expression(token->next, &stmt->goto_expression); |
| add_statement(&function_computed_goto_list, stmt); |
| } else if (token_type(token) == TOKEN_IDENT) { |
| stmt->goto_label = label_symbol(token); |
| token = token->next; |
| } else { |
| sparse_error(token->pos, "Expected identifier or goto expression"); |
| } |
| return expect(token, ';', "at end of statement"); |
| } |
| |
| static struct token *parse_context_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_CONTEXT; |
| token = parse_expression(token->next, &stmt->expression); |
| if (stmt->expression->type == EXPR_PREOP |
| && stmt->expression->op == '(' |
| && stmt->expression->unop->type == EXPR_COMMA) { |
| struct expression *expr; |
| expr = stmt->expression->unop; |
| stmt->context = expr->left; |
| stmt->expression = expr->right; |
| } |
| return expect(token, ';', "at end of statement"); |
| } |
| |
| static struct token *parse_range_statement(struct token *token, struct statement *stmt) |
| { |
| stmt->type = STMT_RANGE; |
| token = assignment_expression(token->next, &stmt->range_expression); |
| token = expect(token, ',', "after range expression"); |
| token = assignment_expression(token, &stmt->range_low); |
| token = expect(token, ',', "after low range"); |
| token = assignment_expression(token, &stmt->range_high); |
| return expect(token, ';', "after range statement"); |
| } |
| |
| static struct token *statement(struct token *token, struct statement **tree) |
| { |
| struct statement *stmt = alloc_statement(token->pos, STMT_NONE); |
| |
| *tree = stmt; |
| if (token_type(token) == TOKEN_IDENT) { |
| struct symbol *s = lookup_keyword(token->ident, NS_KEYWORD); |
| if (s && s->op->statement) |
| return s->op->statement(token, stmt); |
| |
| if (match_op(token->next, ':')) { |
| struct symbol *s = label_symbol(token); |
| stmt->type = STMT_LABEL; |
| stmt->label_identifier = s; |
| if (s->stmt) |
| sparse_error(stmt->pos, "label '%s' redefined", show_ident(token->ident)); |
| s->stmt = stmt; |
| token = skip_attributes(token->next->next); |
| return statement(token, &stmt->label_statement); |
| } |
| } |
| |
| if (match_op(token, '{')) { |
| stmt->type = STMT_COMPOUND; |
| start_symbol_scope(); |
| token = compound_statement(token->next, stmt); |
| end_symbol_scope(); |
| |
| return expect(token, '}', "at end of compound statement"); |
| } |
| |
| stmt->type = STMT_EXPRESSION; |
| return expression_statement(token, &stmt->expression); |
| } |
| |
| /* gcc extension - __label__ ident-list; in the beginning of compound stmt */ |
| static struct token *label_statement(struct token *token) |
| { |
| while (token_type(token) == TOKEN_IDENT) { |
| struct symbol *sym = alloc_symbol(token->pos, SYM_LABEL); |
| /* it's block-scope, but we want label namespace */ |
| bind_symbol(sym, token->ident, NS_SYMBOL); |
| sym->namespace = NS_LABEL; |
| fn_local_symbol(sym); |
| token = token->next; |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| return expect(token, ';', "at end of label declaration"); |
| } |
| |
| static struct token * statement_list(struct token *token, struct statement_list **list) |
| { |
| int seen_statement = 0; |
| while (token_type(token) == TOKEN_IDENT && |
| token->ident == &__label___ident) |
| token = label_statement(token->next); |
| for (;;) { |
| struct statement * stmt; |
| if (eof_token(token)) |
| break; |
| if (match_op(token, '}')) |
| break; |
| if (lookup_type(token)) { |
| if (seen_statement) { |
| warning(token->pos, "mixing declarations and code"); |
| seen_statement = 0; |
| } |
| stmt = alloc_statement(token->pos, STMT_DECLARATION); |
| token = external_declaration(token, &stmt->declaration); |
| } else { |
| seen_statement = Wdeclarationafterstatement; |
| token = statement(token, &stmt); |
| } |
| add_statement(list, stmt); |
| } |
| return token; |
| } |
| |
| static struct token *identifier_list(struct token *token, struct symbol *fn) |
| { |
| struct symbol_list **list = &fn->arguments; |
| for (;;) { |
| struct symbol *sym = alloc_symbol(token->pos, SYM_NODE); |
| sym->ident = token->ident; |
| token = token->next; |
| sym->endpos = token->pos; |
| sym->ctype.base_type = &incomplete_ctype; |
| add_symbol(list, sym); |
| if (!match_op(token, ',') || |
| token_type(token->next) != TOKEN_IDENT || |
| lookup_type(token->next)) |
| break; |
| token = token->next; |
| } |
| return token; |
| } |
| |
| static struct token *parameter_type_list(struct token *token, struct symbol *fn) |
| { |
| struct symbol_list **list = &fn->arguments; |
| |
| for (;;) { |
| struct symbol *sym; |
| |
| if (match_op(token, SPECIAL_ELLIPSIS)) { |
| fn->variadic = 1; |
| token = token->next; |
| break; |
| } |
| |
| sym = alloc_symbol(token->pos, SYM_NODE); |
| token = parameter_declaration(token, sym); |
| if (sym->ctype.base_type == &void_ctype) { |
| /* Special case: (void) */ |
| if (!*list && !sym->ident) |
| break; |
| warning(token->pos, "void parameter"); |
| } |
| add_symbol(list, sym); |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| return token; |
| } |
| |
| struct token *compound_statement(struct token *token, struct statement *stmt) |
| { |
| token = statement_list(token, &stmt->stmts); |
| return token; |
| } |
| |
| static struct expression *identifier_expression(struct token *token) |
| { |
| struct expression *expr = alloc_expression(token->pos, EXPR_IDENTIFIER); |
| expr->expr_ident = token->ident; |
| return expr; |
| } |
| |
| static struct expression *index_expression(struct expression *from, struct expression *to) |
| { |
| int idx_from, idx_to; |
| struct expression *expr = alloc_expression(from->pos, EXPR_INDEX); |
| |
| idx_from = const_expression_value(from); |
| idx_to = idx_from; |
| if (to) { |
| idx_to = const_expression_value(to); |
| if (idx_to < idx_from || idx_from < 0) |
| warning(from->pos, "nonsense array initializer index range"); |
| } |
| expr->idx_from = idx_from; |
| expr->idx_to = idx_to; |
| return expr; |
| } |
| |
| static struct token *single_initializer(struct expression **ep, struct token *token) |
| { |
| int expect_equal = 0; |
| struct token *next = token->next; |
| struct expression **tail = ep; |
| int nested; |
| |
| *ep = NULL; |
| |
| if ((token_type(token) == TOKEN_IDENT) && match_op(next, ':')) { |
| struct expression *expr = identifier_expression(token); |
| if (Wold_initializer) |
| warning(token->pos, "obsolete struct initializer, use C99 syntax"); |
| token = initializer(&expr->ident_expression, next->next); |
| if (expr->ident_expression) |
| *ep = expr; |
| return token; |
| } |
| |
| for (tail = ep, nested = 0; ; nested++, next = token->next) { |
| if (match_op(token, '.') && (token_type(next) == TOKEN_IDENT)) { |
| struct expression *expr = identifier_expression(next); |
| *tail = expr; |
| tail = &expr->ident_expression; |
| expect_equal = 1; |
| token = next->next; |
| } else if (match_op(token, '[')) { |
| struct expression *from = NULL, *to = NULL, *expr; |
| token = constant_expression(token->next, &from); |
| if (!from) { |
| sparse_error(token->pos, "Expected constant expression"); |
| break; |
| } |
| if (match_op(token, SPECIAL_ELLIPSIS)) |
| token = constant_expression(token->next, &to); |
| expr = index_expression(from, to); |
| *tail = expr; |
| tail = &expr->idx_expression; |
| token = expect(token, ']', "at end of initializer index"); |
| if (nested) |
| expect_equal = 1; |
| } else { |
| break; |
| } |
| } |
| if (nested && !expect_equal) { |
| if (!match_op(token, '=')) |
| warning(token->pos, "obsolete array initializer, use C99 syntax"); |
| else |
| expect_equal = 1; |
| } |
| if (expect_equal) |
| token = expect(token, '=', "at end of initializer index"); |
| |
| token = initializer(tail, token); |
| if (!*tail) |
| *ep = NULL; |
| return token; |
| } |
| |
| static struct token *initializer_list(struct expression_list **list, struct token *token) |
| { |
| struct expression *expr; |
| |
| for (;;) { |
| token = single_initializer(&expr, token); |
| if (!expr) |
| break; |
| add_expression(list, expr); |
| if (!match_op(token, ',')) |
| break; |
| token = token->next; |
| } |
| return token; |
| } |
| |
| struct token *initializer(struct expression **tree, struct token *token) |
| { |
| if (match_op(token, '{')) { |
| struct expression *expr = alloc_expression(token->pos, EXPR_INITIALIZER); |
| *tree = expr; |
| token = initializer_list(&expr->expr_list, token->next); |
| return expect(token, '}', "at end of initializer"); |
| } |
| return assignment_expression(token, tree); |
| } |
| |
| static void declare_argument(struct symbol *sym, struct symbol *fn) |
| { |
| if (!sym->ident) { |
| sparse_error(sym->pos, "no identifier for function argument"); |
| return; |
| } |
| bind_symbol(sym, sym->ident, NS_SYMBOL); |
| } |
| |
| static struct token *parse_function_body(struct token *token, struct symbol *decl, |
| struct symbol_list **list) |
| { |
| struct symbol_list **old_symbol_list; |
| struct symbol *base_type = decl->ctype.base_type; |
| struct statement *stmt, **p; |
| struct symbol *prev; |
| struct symbol *arg; |
| |
| old_symbol_list = function_symbol_list; |
| if (decl->ctype.modifiers & MOD_INLINE) { |
| function_symbol_list = &decl->inline_symbol_list; |
| p = &base_type->inline_stmt; |
| } else { |
| function_symbol_list = &decl->symbol_list; |
| p = &base_type->stmt; |
| } |
| function_computed_target_list = NULL; |
| function_computed_goto_list = NULL; |
| |
| if (decl->ctype.modifiers & MOD_EXTERN) { |
| if (!(decl->ctype.modifiers & MOD_INLINE)) |
| warning(decl->pos, "function '%s' with external linkage has definition", show_ident(decl->ident)); |
| } |
| if (!(decl->ctype.modifiers & MOD_STATIC)) |
| decl->ctype.modifiers |= MOD_EXTERN; |
| |
| stmt = start_function(decl); |
| |
| *p = stmt; |
| FOR_EACH_PTR (base_type->arguments, arg) { |
| declare_argument(arg, base_type); |
| } END_FOR_EACH_PTR(arg); |
| |
| token = compound_statement(token->next, stmt); |
| |
| end_function(decl); |
| if (!(decl->ctype.modifiers & MOD_INLINE)) |
| add_symbol(list, decl); |
| check_declaration(decl); |
| decl->definition = decl; |
| prev = decl->same_symbol; |
| if (prev && prev->definition) { |
| warning(decl->pos, "multiple definitions for function '%s'", |
| show_ident(decl->ident)); |
| info(prev->definition->pos, " the previous one is here"); |
| } else { |
| while (prev) { |
| prev->definition = decl; |
| prev = prev->same_symbol; |
| } |
| } |
| function_symbol_list = old_symbol_list; |
| if (function_computed_goto_list) { |
| if (!function_computed_target_list) |
| warning(decl->pos, "function '%s' has computed goto but no targets?", show_ident(decl->ident)); |
| else { |
| FOR_EACH_PTR(function_computed_goto_list, stmt) { |
| stmt->target_list = function_computed_target_list; |
| } END_FOR_EACH_PTR(stmt); |
| } |
| } |
| return expect(token, '}', "at end of function"); |
| } |
| |
| static void promote_k_r_types(struct symbol *arg) |
| { |
| struct symbol *base = arg->ctype.base_type; |
| if (base && base->ctype.base_type == &int_type && (base->ctype.modifiers & (MOD_CHAR | MOD_SHORT))) { |
| arg->ctype.base_type = &int_ctype; |
| } |
| } |
| |
| static void apply_k_r_types(struct symbol_list *argtypes, struct symbol *fn) |
| { |
| struct symbol_list *real_args = fn->ctype.base_type->arguments; |
| struct symbol *arg; |
| |
| FOR_EACH_PTR(real_args, arg) { |
| struct symbol *type; |
| |
| /* This is quadratic in the number of arguments. We _really_ don't care */ |
| FOR_EACH_PTR(argtypes, type) { |
| if (type->ident == arg->ident) |
| goto match; |
| } END_FOR_EACH_PTR(type); |
| sparse_error(arg->pos, "missing type declaration for parameter '%s'", show_ident(arg->ident)); |
| continue; |
| match: |
| type->used = 1; |
| /* "char" and "short" promote to "int" */ |
| promote_k_r_types(type); |
| |
| arg->ctype = type->ctype; |
| } END_FOR_EACH_PTR(arg); |
| |
| FOR_EACH_PTR(argtypes, arg) { |
| if (!arg->used) |
| warning(arg->pos, "nonsensical parameter declaration '%s'", show_ident(arg->ident)); |
| } END_FOR_EACH_PTR(arg); |
| |
| } |
| |
| static struct token *parse_k_r_arguments(struct token *token, struct symbol *decl, |
| struct symbol_list **list) |
| { |
| struct symbol_list *args = NULL; |
| |
| warning(token->pos, "non-ANSI definition of function '%s'", show_ident(decl->ident)); |
| do { |
| token = declaration_list(token, &args); |
| if (!match_op(token, ';')) { |
| sparse_error(token->pos, "expected ';' at end of parameter declaration"); |
| break; |
| } |
| token = token->next; |
| } while (lookup_type(token)); |
| |
| apply_k_r_types(args, decl); |
| |
| if (!match_op(token, '{')) { |
| sparse_error(token->pos, "expected function body"); |
| return token; |
| } |
| return parse_function_body(token, decl, list); |
| } |
| |
| static struct token *toplevel_asm_declaration(struct token *token, struct symbol_list **list) |
| { |
| struct symbol *anon = alloc_symbol(token->pos, SYM_NODE); |
| struct symbol *fn = alloc_symbol(token->pos, SYM_FN); |
| struct statement *stmt; |
| |
| anon->ctype.base_type = fn; |
| stmt = alloc_statement(token->pos, STMT_NONE); |
| fn->stmt = stmt; |
| |
| token = parse_asm_statement(token, stmt); |
| |
| add_symbol(list, anon); |
| return token; |
| } |
| |
| struct token *external_declaration(struct token *token, struct symbol_list **list) |
| { |
| struct ident *ident = NULL; |
| struct symbol *decl; |
| struct decl_state ctx = { .ident = &ident }; |
| struct ctype saved; |
| struct symbol *base_type; |
| unsigned long mod; |
| int is_typedef; |
| |
| /* Top-level inline asm? */ |
| if (token_type(token) == TOKEN_IDENT) { |
| struct symbol *s = lookup_keyword(token->ident, NS_KEYWORD); |
| if (s && s->op->toplevel) |
| return s->op->toplevel(token, list); |
| } |
| |
| /* Parse declaration-specifiers, if any */ |
| token = declaration_specifiers(token, &ctx); |
| mod = storage_modifiers(&ctx); |
| decl = alloc_symbol(token->pos, SYM_NODE); |
| /* Just a type declaration? */ |
| if (match_op(token, ';')) { |
| apply_modifiers(token->pos, &ctx); |
| return token->next; |
| } |
| |
| saved = ctx.ctype; |
| token = declarator(token, &ctx); |
| token = handle_attributes(token, &ctx, KW_ATTRIBUTE | KW_ASM); |
| apply_modifiers(token->pos, &ctx); |
| |
| decl->ctype = ctx.ctype; |
| decl->ctype.modifiers |= mod; |
| decl->endpos = token->pos; |
| |
| /* Just a type declaration? */ |
| if (!ident) { |
| warning(token->pos, "missing identifier in declaration"); |
| return expect(token, ';', "at the end of type declaration"); |
| } |
| |
| /* type define declaration? */ |
| is_typedef = ctx.storage_class == STypedef; |
| |
| /* Typedefs don't have meaningful storage */ |
| if (is_typedef) |
| decl->ctype.modifiers |= MOD_USERTYPE; |
| |
| bind_symbol(decl, ident, is_typedef ? NS_TYPEDEF: NS_SYMBOL); |
| |
| base_type = decl->ctype.base_type; |
| |
| if (is_typedef) { |
| if (base_type && !base_type->ident) { |
| switch (base_type->type) { |
| case SYM_STRUCT: |
| case SYM_UNION: |
| case SYM_ENUM: |
| case SYM_RESTRICT: |
| base_type->ident = ident; |
| } |
| } |
| } else if (base_type && base_type->type == SYM_FN) { |
| /* K&R argument declaration? */ |
| if (lookup_type(token)) |
| return parse_k_r_arguments(token, decl, list); |
| if (match_op(token, '{')) |
| return parse_function_body(token, decl, list); |
| |
| if (!(decl->ctype.modifiers & MOD_STATIC)) |
| decl->ctype.modifiers |= MOD_EXTERN; |
| } else if (base_type == &void_ctype && !(decl->ctype.modifiers & MOD_EXTERN)) { |
| sparse_error(token->pos, "void declaration"); |
| } |
| |
| for (;;) { |
| if (!is_typedef && match_op(token, '=')) { |
| if (decl->ctype.modifiers & MOD_EXTERN) { |
| warning(decl->pos, "symbol with external linkage has initializer"); |
| decl->ctype.modifiers &= ~MOD_EXTERN; |
| } |
| token = initializer(&decl->initializer, token->next); |
| } |
| if (!is_typedef) { |
| if (!(decl->ctype.modifiers & (MOD_EXTERN | MOD_INLINE))) { |
| add_symbol(list, decl); |
| fn_local_symbol(decl); |
| } |
| } |
| check_declaration(decl); |
| if (decl->same_symbol) |
| decl->definition = decl->same_symbol->definition; |
| |
| if (!match_op(token, ',')) |
| break; |
| |
| token = token->next; |
| ident = NULL; |
| decl = alloc_symbol(token->pos, SYM_NODE); |
| ctx.ctype = saved; |
| token = handle_attributes(token, &ctx, KW_ATTRIBUTE); |
| token = declarator(token, &ctx); |
| token = handle_attributes(token, &ctx, KW_ATTRIBUTE | KW_ASM); |
| apply_modifiers(token->pos, &ctx); |
| decl->ctype = ctx.ctype; |
| decl->ctype.modifiers |= mod; |
| decl->endpos = token->pos; |
| if (!ident) { |
| sparse_error(token->pos, "expected identifier name in type definition"); |
| return token; |
| } |
| |
| if (is_typedef) |
| decl->ctype.modifiers |= MOD_USERTYPE; |
| |
| bind_symbol(decl, ident, is_typedef ? NS_TYPEDEF: NS_SYMBOL); |
| |
| /* Function declarations are automatically extern unless specifically static */ |
| base_type = decl->ctype.base_type; |
| if (!is_typedef && base_type && base_type->type == SYM_FN) { |
| if (!(decl->ctype.modifiers & MOD_STATIC)) |
| decl->ctype.modifiers |= MOD_EXTERN; |
| } |
| } |
| return expect(token, ';', "at end of declaration"); |
| } |