X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=f02dc668a37122a5b76d3f71c3a7eae40cd6a025;hb=d19234c0fe4d47948c5732b9aee9819ff31f60f2;hp=8515e936c7bd440afe1d83ebe8b2aa27f246d161;hpb=83bd59cf68577d31ae6c9abbfb7e4f6287f5f360;p=cparser diff --git a/ast.c b/ast.c index 8515e93..c62110a 100644 --- a/ast.c +++ b/ast.c @@ -1,21 +1,59 @@ +/* + * This file is part of cparser. + * Copyright (C) 2007-2009 Matthias Braun + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + * 02111-1307, USA. + */ #include #include "ast_t.h" +#include "symbol_t.h" #include "type_t.h" +#include "parser.h" +#include "lang_features.h" +#include "entity_t.h" +#include "printer.h" +#include "types.h" #include #include #include #include +#if defined(__INTEL_COMPILER) +#include +#elif defined(__CYGWIN__) +#include "win32/cygwin_math_ext.h" +#else +#include +#endif + #include "adt/error.h" +#include "adt/util.h" struct obstack ast_obstack; -static FILE *out; -static int indent; +static int indent; +static int case_indent; + +bool print_implicit_casts = false; +bool print_parenthesis = false; static void print_statement(const statement_t *statement); +static void print_expression_prec(const expression_t *expression, unsigned prec); void change_indent(int delta) { @@ -25,500 +63,1114 @@ void change_indent(int delta) void print_indent(void) { - for(int i = 0; i < indent; ++i) - fprintf(out, "\t"); + for (int i = 0; i < indent; ++i) + print_char('\t'); } -static void print_const(const const_expression_t *cnst) +static void print_stringrep(const string_t *string) { - if(cnst->expression.datatype == NULL) - return; + for (size_t i = 0; i < string->size; ++i) { + print_char(string->begin[i]); + } +} - if(is_type_integer(cnst->expression.datatype)) { - fprintf(out, "%lld", cnst->v.int_value); - } else if(is_type_floating(cnst->expression.datatype)) { - fprintf(out, "%Lf", cnst->v.float_value); +/** + * Returns 1 if a given precedence level has right-to-left + * associativity, else 0. + * + * @param precedence the operator precedence + */ +static int right_to_left(unsigned precedence) +{ + switch (precedence) { + case PREC_ASSIGNMENT: + case PREC_CONDITIONAL: + case PREC_UNARY: + return 1; + + default: + return 0; } } -static void print_quoted_string(const char *string) +/** + * Return the precedence of an expression given by its kind. + * + * @param kind the expression kind + */ +static unsigned get_expression_precedence(expression_kind_t kind) { - fputc('"', out); - for(const char *c = string; *c != '\0'; ++c) { - switch(*c) { - case '\"': fputs("\\\"", out); break; - case '\\': fputs("\\\\", out); break; - case '\a': fputs("\\a", out); break; - case '\b': fputs("\\b", out); break; - case '\f': fputs("\\f", out); break; - case '\n': fputs("\\n", out); break; - case '\r': fputs("\\r", out); break; - case '\t': fputs("\\t", out); break; - case '\v': fputs("\\v", out); break; - case '\?': fputs("\\?", out); break; + static const unsigned prec[] = { + [EXPR_REFERENCE] = PREC_PRIMARY, + [EXPR_REFERENCE_ENUM_VALUE] = PREC_PRIMARY, + [EXPR_LITERAL_INTEGER] = PREC_PRIMARY, + [EXPR_LITERAL_INTEGER_OCTAL] = PREC_PRIMARY, + [EXPR_LITERAL_INTEGER_HEXADECIMAL] = PREC_PRIMARY, + [EXPR_LITERAL_FLOATINGPOINT] = PREC_PRIMARY, + [EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL] = PREC_PRIMARY, + [EXPR_LITERAL_CHARACTER] = PREC_PRIMARY, + [EXPR_LITERAL_WIDE_CHARACTER] = PREC_PRIMARY, + [EXPR_LITERAL_MS_NOOP] = PREC_PRIMARY, + [EXPR_STRING_LITERAL] = PREC_PRIMARY, + [EXPR_WIDE_STRING_LITERAL] = PREC_PRIMARY, + [EXPR_COMPOUND_LITERAL] = PREC_UNARY, + [EXPR_CALL] = PREC_POSTFIX, + [EXPR_CONDITIONAL] = PREC_CONDITIONAL, + [EXPR_SELECT] = PREC_POSTFIX, + [EXPR_ARRAY_ACCESS] = PREC_POSTFIX, + [EXPR_SIZEOF] = PREC_UNARY, + [EXPR_CLASSIFY_TYPE] = PREC_UNARY, + [EXPR_ALIGNOF] = PREC_UNARY, + + [EXPR_FUNCNAME] = PREC_PRIMARY, + [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIMARY, + [EXPR_BUILTIN_TYPES_COMPATIBLE_P] = PREC_PRIMARY, + [EXPR_OFFSETOF] = PREC_PRIMARY, + [EXPR_VA_START] = PREC_PRIMARY, + [EXPR_VA_ARG] = PREC_PRIMARY, + [EXPR_VA_COPY] = PREC_PRIMARY, + [EXPR_STATEMENT] = PREC_PRIMARY, + [EXPR_LABEL_ADDRESS] = PREC_PRIMARY, + + [EXPR_UNARY_NEGATE] = PREC_UNARY, + [EXPR_UNARY_PLUS] = PREC_UNARY, + [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY, + [EXPR_UNARY_NOT] = PREC_UNARY, + [EXPR_UNARY_DEREFERENCE] = PREC_UNARY, + [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY, + [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_POSTFIX, + [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_POSTFIX, + [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY, + [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY, + [EXPR_UNARY_CAST] = PREC_UNARY, + [EXPR_UNARY_ASSUME] = PREC_PRIMARY, + [EXPR_UNARY_DELETE] = PREC_UNARY, + [EXPR_UNARY_DELETE_ARRAY] = PREC_UNARY, + [EXPR_UNARY_THROW] = PREC_ASSIGNMENT, + + [EXPR_BINARY_ADD] = PREC_ADDITIVE, + [EXPR_BINARY_SUB] = PREC_ADDITIVE, + [EXPR_BINARY_MUL] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_DIV] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_MOD] = PREC_MULTIPLICATIVE, + [EXPR_BINARY_EQUAL] = PREC_EQUALITY, + [EXPR_BINARY_NOTEQUAL] = PREC_EQUALITY, + [EXPR_BINARY_LESS] = PREC_RELATIONAL, + [EXPR_BINARY_LESSEQUAL] = PREC_RELATIONAL, + [EXPR_BINARY_GREATER] = PREC_RELATIONAL, + [EXPR_BINARY_GREATEREQUAL] = PREC_RELATIONAL, + [EXPR_BINARY_BITWISE_AND] = PREC_AND, + [EXPR_BINARY_BITWISE_OR] = PREC_OR, + [EXPR_BINARY_BITWISE_XOR] = PREC_XOR, + [EXPR_BINARY_LOGICAL_AND] = PREC_LOGICAL_AND, + [EXPR_BINARY_LOGICAL_OR] = PREC_LOGICAL_OR, + [EXPR_BINARY_SHIFTLEFT] = PREC_SHIFT, + [EXPR_BINARY_SHIFTRIGHT] = PREC_SHIFT, + [EXPR_BINARY_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGNMENT, + [EXPR_BINARY_COMMA] = PREC_EXPRESSION, + + [EXPR_BINARY_ISGREATER] = PREC_PRIMARY, + [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIMARY, + [EXPR_BINARY_ISLESS] = PREC_PRIMARY, + [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIMARY, + [EXPR_BINARY_ISLESSGREATER] = PREC_PRIMARY, + [EXPR_BINARY_ISUNORDERED] = PREC_PRIMARY + }; + assert((size_t)kind < lengthof(prec)); + unsigned res = prec[kind]; + + assert(res != PREC_BOTTOM); + return res; +} + +/** + * Print a quoted string constant. + * + * @param string the string constant + * @param border the border char + * @param skip number of chars to skip at the end + */ +static void print_quoted_string(const string_t *const string, char border, + int skip) +{ + print_char(border); + const char *end = string->begin + string->size - skip; + for (const char *c = string->begin; c != end; ++c) { + const char tc = *c; + if (tc == border) { + print_char('\\'); + } + switch (tc) { + case '\\': print_string("\\\\"); break; + case '\a': print_string("\\a"); break; + case '\b': print_string("\\b"); break; + case '\f': print_string("\\f"); break; + case '\n': print_string("\\n"); break; + case '\r': print_string("\\r"); break; + case '\t': print_string("\\t"); break; + case '\v': print_string("\\v"); break; + case '\?': print_string("\\?"); break; + case 27: + if (c_mode & _GNUC) { + print_string("\\e"); break; + } + /* FALLTHROUGH */ default: - if(!isprint(*c)) { - fprintf(out, "\\x%x", *c); - break; + if ((unsigned)tc < 0x80 && !isprint(tc)) { + print_format("\\%03o", (unsigned)tc); + } else { + print_char(tc); } - fputc(*c, out); break; } } - fputc('"', out); + print_char(border); } -static void print_string_literal( - const string_literal_expression_t *string_literal) +static void print_string_literal(const string_literal_expression_t *literal) { - print_quoted_string(string_literal->value); + if (literal->base.kind == EXPR_WIDE_STRING_LITERAL) { + print_char('L'); + } + print_quoted_string(&literal->value, '"', 1); } +static void print_literal(const literal_expression_t *literal) +{ + switch (literal->base.kind) { + case EXPR_LITERAL_MS_NOOP: + print_string("__noop"); + return; + case EXPR_LITERAL_INTEGER_HEXADECIMAL: + case EXPR_LITERAL_FLOATINGPOINT_HEXADECIMAL: + print_string("0x"); + /* FALLTHROUGH */ + case EXPR_LITERAL_BOOLEAN: + case EXPR_LITERAL_INTEGER: + case EXPR_LITERAL_INTEGER_OCTAL: + case EXPR_LITERAL_FLOATINGPOINT: + print_stringrep(&literal->value); + if (literal->suffix.size > 0) + print_stringrep(&literal->suffix); + return; + case EXPR_LITERAL_WIDE_CHARACTER: + print_char('L'); + /* FALLTHROUGH */ + case EXPR_LITERAL_CHARACTER: + print_quoted_string(&literal->value, '\'', 0); + return; + default: + break; + } + print_string("INVALID LITERAL KIND"); +} + +/** + * Prints a predefined symbol. + */ +static void print_funcname(const funcname_expression_t *funcname) +{ + const char *s = ""; + switch (funcname->kind) { + case FUNCNAME_FUNCTION: s = (c_mode & _C99) ? "__func__" : "__FUNCTION__"; break; + case FUNCNAME_PRETTY_FUNCTION: s = "__PRETTY_FUNCTION__"; break; + case FUNCNAME_FUNCSIG: s = "__FUNCSIG__"; break; + case FUNCNAME_FUNCDNAME: s = "__FUNCDNAME__"; break; + } + print_string(s); +} + +static void print_compound_literal( + const compound_literal_expression_t *expression) +{ + print_char('('); + print_type(expression->type); + print_char(')'); + print_initializer(expression->initializer); +} + +static void print_assignment_expression(const expression_t *const expr) +{ + print_expression_prec(expr, PREC_ASSIGNMENT); +} + +/** + * Prints a call expression. + * + * @param call the call expression + */ static void print_call_expression(const call_expression_t *call) { - print_expression(call->function); - fprintf(out, "("); + print_expression_prec(call->function, PREC_POSTFIX); + print_char('('); call_argument_t *argument = call->arguments; int first = 1; - while(argument != NULL) { - if(!first) { - fprintf(out, ", "); + while (argument != NULL) { + if (!first) { + print_string(", "); } else { first = 0; } - print_expression(argument->expression); + print_assignment_expression(argument->expression); argument = argument->next; } - fprintf(out, ")"); + print_char(')'); } +/** + * Prints a binary expression. + * + * @param binexpr the binary expression + */ static void print_binary_expression(const binary_expression_t *binexpr) { - fprintf(out, "("); - print_expression(binexpr->left); - fprintf(out, " "); - switch(binexpr->type) { - case BINEXPR_INVALID: fputs("INVOP", out); break; - case BINEXPR_COMMA: fputs(",", out); break; - case BINEXPR_ASSIGN: fputs("=", out); break; - case BINEXPR_ADD: fputs("+", out); break; - case BINEXPR_SUB: fputs("-", out); break; - case BINEXPR_MUL: fputs("*", out); break; - case BINEXPR_MOD: fputs("%", out); break; - case BINEXPR_DIV: fputs("/", out); break; - case BINEXPR_BITWISE_OR: fputs("|", out); break; - case BINEXPR_BITWISE_AND: fputs("&", out); break; - case BINEXPR_BITWISE_XOR: fputs("^", out); break; - case BINEXPR_LOGICAL_OR: fputs("||", out); break; - case BINEXPR_LOGICAL_AND: fputs("&&", out); break; - case BINEXPR_NOTEQUAL: fputs("!=", out); break; - case BINEXPR_EQUAL: fputs("==", out); break; - case BINEXPR_LESS: fputs("<", out); break; - case BINEXPR_LESSEQUAL: fputs("<=", out); break; - case BINEXPR_GREATER: fputs(">", out); break; - case BINEXPR_GREATEREQUAL: fputs(">=", out); break; - case BINEXPR_SHIFTLEFT: fputs("<<", out); break; - case BINEXPR_SHIFTRIGHT: fputs(">>", out); break; - - case BINEXPR_ADD_ASSIGN: fputs("+=", out); break; - case BINEXPR_SUB_ASSIGN: fputs("-=", out); break; - case BINEXPR_MUL_ASSIGN: fputs("*=", out); break; - case BINEXPR_MOD_ASSIGN: fputs("%=", out); break; - case BINEXPR_DIV_ASSIGN: fputs("/=", out); break; - case BINEXPR_BITWISE_OR_ASSIGN: fputs("|=", out); break; - case BINEXPR_BITWISE_AND_ASSIGN: fputs("&=", out); break; - case BINEXPR_BITWISE_XOR_ASSIGN: fputs("^=", out); break; - case BINEXPR_SHIFTLEFT_ASSIGN: fputs("<<=", out); break; - case BINEXPR_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break; - } - fprintf(out, " "); - print_expression(binexpr->right); - fprintf(out, ")"); + unsigned prec = get_expression_precedence(binexpr->base.kind); + int r2l = right_to_left(prec); + + print_expression_prec(binexpr->left, prec + r2l); + char const* op; + switch (binexpr->base.kind) { + case EXPR_BINARY_COMMA: op = ", "; break; + case EXPR_BINARY_ASSIGN: op = " = "; break; + case EXPR_BINARY_ADD: op = " + "; break; + case EXPR_BINARY_SUB: op = " - "; break; + case EXPR_BINARY_MUL: op = " * "; break; + case EXPR_BINARY_MOD: op = " % "; break; + case EXPR_BINARY_DIV: op = " / "; break; + case EXPR_BINARY_BITWISE_OR: op = " | "; break; + case EXPR_BINARY_BITWISE_AND: op = " & "; break; + case EXPR_BINARY_BITWISE_XOR: op = " ^ "; break; + case EXPR_BINARY_LOGICAL_OR: op = " || "; break; + case EXPR_BINARY_LOGICAL_AND: op = " && "; break; + case EXPR_BINARY_NOTEQUAL: op = " != "; break; + case EXPR_BINARY_EQUAL: op = " == "; break; + case EXPR_BINARY_LESS: op = " < "; break; + case EXPR_BINARY_LESSEQUAL: op = " <= "; break; + case EXPR_BINARY_GREATER: op = " > "; break; + case EXPR_BINARY_GREATEREQUAL: op = " >= "; break; + case EXPR_BINARY_SHIFTLEFT: op = " << "; break; + case EXPR_BINARY_SHIFTRIGHT: op = " >> "; break; + + case EXPR_BINARY_ADD_ASSIGN: op = " += "; break; + case EXPR_BINARY_SUB_ASSIGN: op = " -= "; break; + case EXPR_BINARY_MUL_ASSIGN: op = " *= "; break; + case EXPR_BINARY_MOD_ASSIGN: op = " %= "; break; + case EXPR_BINARY_DIV_ASSIGN: op = " /= "; break; + case EXPR_BINARY_BITWISE_OR_ASSIGN: op = " |= "; break; + case EXPR_BINARY_BITWISE_AND_ASSIGN: op = " &= "; break; + case EXPR_BINARY_BITWISE_XOR_ASSIGN: op = " ^= "; break; + case EXPR_BINARY_SHIFTLEFT_ASSIGN: op = " <<= "; break; + case EXPR_BINARY_SHIFTRIGHT_ASSIGN: op = " >>= "; break; + default: panic("invalid binexpression found"); + } + print_string(op); + print_expression_prec(binexpr->right, prec + 1 - r2l); } +/** + * Prints an unary expression. + * + * @param unexpr the unary expression + */ static void print_unary_expression(const unary_expression_t *unexpr) { - switch(unexpr->type) { - case UNEXPR_NEGATE: fputs("-", out); break; - case UNEXPR_PLUS: fputs("+", out); break; - case UNEXPR_NOT: fputs("!", out); break; - case UNEXPR_BITWISE_NEGATE: fputs("~", out); break; - case UNEXPR_PREFIX_INCREMENT: fputs("++", out); break; - case UNEXPR_PREFIX_DECREMENT: fputs("--", out); break; - case UNEXPR_DEREFERENCE: fputs("*", out); break; - case UNEXPR_TAKE_ADDRESS: fputs("&", out); break; - - case UNEXPR_POSTFIX_INCREMENT: - fputs("(", out); - print_expression(unexpr->value); - fputs(")", out); - fputs("++", out); + unsigned prec = get_expression_precedence(unexpr->base.kind); + switch (unexpr->base.kind) { + case EXPR_UNARY_NEGATE: print_char ('-' ); break; + case EXPR_UNARY_PLUS: print_char ('+' ); break; + case EXPR_UNARY_NOT: print_char ('!' ); break; + case EXPR_UNARY_BITWISE_NEGATE: print_char ('~' ); break; + case EXPR_UNARY_PREFIX_INCREMENT: print_string("++"); break; + case EXPR_UNARY_PREFIX_DECREMENT: print_string("--"); break; + case EXPR_UNARY_DEREFERENCE: print_char ('*' ); break; + case EXPR_UNARY_TAKE_ADDRESS: print_char ('&' ); break; + case EXPR_UNARY_DELETE: print_string("delete "); break; + case EXPR_UNARY_DELETE_ARRAY: print_string("delete [] "); break; + + case EXPR_UNARY_POSTFIX_INCREMENT: + print_expression_prec(unexpr->value, prec); + print_string("++"); return; - case UNEXPR_POSTFIX_DECREMENT: - fputs("(", out); - print_expression(unexpr->value); - fputs(")", out); - fputs("--", out); + case EXPR_UNARY_POSTFIX_DECREMENT: + print_expression_prec(unexpr->value, prec); + print_string("--"); return; - case UNEXPR_CAST: - fputs("(", out); - print_type(unexpr->expression.datatype); - fputs(")", out); + case EXPR_UNARY_CAST: + print_char('('); + print_type(unexpr->base.type); + print_char(')'); break; - case UNEXPR_INVALID: - fprintf(out, "unop%d", (int) unexpr->type); + case EXPR_UNARY_ASSUME: + print_string("__assume("); + print_assignment_expression(unexpr->value); + print_char(')'); + return; + + case EXPR_UNARY_THROW: + if (unexpr->value == NULL) { + print_string("throw"); + return; + } + print_string("throw "); break; + + default: + panic("invalid unary expression found"); } - fputs("(", out); - print_expression(unexpr->value); - fputs(")", out); + print_expression_prec(unexpr->value, prec); } +/** + * Prints a reference expression. + * + * @param ref the reference expression + */ static void print_reference_expression(const reference_expression_t *ref) { - fprintf(out, "%s", ref->declaration->symbol->string); + print_string(ref->entity->base.symbol->string); +} + +/** + * Prints a label address expression. + * + * @param ref the reference expression + */ +static void print_label_address_expression(const label_address_expression_t *le) +{ + print_format("&&%s", le->label->base.symbol->string); } +/** + * Prints an array expression. + * + * @param expression the array expression + */ static void print_array_expression(const array_access_expression_t *expression) { - if(!expression->flipped) { - fputs("(", out); - print_expression(expression->array_ref); - fputs(")[", out); + if (!expression->flipped) { + print_expression_prec(expression->array_ref, PREC_POSTFIX); + print_char('['); print_expression(expression->index); - fputs("]", out); + print_char(']'); } else { - fputs("(", out); - print_expression(expression->index); - fputs(")[", out); + print_expression_prec(expression->index, PREC_POSTFIX); + print_char('['); print_expression(expression->array_ref); - fputs("]", out); + print_char(']'); } } -static void print_sizeof_expression(const sizeof_expression_t *expression) +/** + * Prints a typeproperty expression (sizeof or __alignof__). + * + * @param expression the type property expression + */ +static void print_typeprop_expression(const typeprop_expression_t *expression) { - fputs("sizeof", out); - if(expression->size_expression != NULL) { - fputc('(', out); - print_expression(expression->size_expression); - fputc(')', out); + if (expression->base.kind == EXPR_SIZEOF) { + print_string("sizeof"); } else { - fputc('(', out); + assert(expression->base.kind == EXPR_ALIGNOF); + print_string("__alignof__"); + } + if (expression->tp_expression != NULL) { + /* PREC_TOP: always print the '()' here, sizeof x is right but unusual */ + print_expression_prec(expression->tp_expression, PREC_TOP); + } else { + print_char('('); print_type(expression->type); - fputc(')', out); + print_char(')'); } } -static void print_builtin_symbol(const builtin_symbol_expression_t *expression) +/** + * Prints a builtin constant expression. + * + * @param expression the builtin constant expression + */ +static void print_builtin_constant(const builtin_constant_expression_t *expression) +{ + print_string("__builtin_constant_p("); + print_assignment_expression(expression->value); + print_char(')'); +} + +/** + * Prints a builtin types compatible expression. + * + * @param expression the builtin types compatible expression + */ +static void print_builtin_types_compatible( + const builtin_types_compatible_expression_t *expression) { - fputs(expression->symbol->string, out); + print_string("__builtin_types_compatible_p("); + print_type(expression->left); + print_string(", "); + print_type(expression->right); + print_char(')'); } +/** + * Prints a conditional expression. + * + * @param expression the conditional expression + */ static void print_conditional(const conditional_expression_t *expression) { - fputs("(", out); - print_expression(expression->condition); - fputs(" ? ", out); - print_expression(expression->true_expression); - fputs(" : ", out); - print_expression(expression->false_expression); - fputs(")", out); + print_expression_prec(expression->condition, PREC_LOGICAL_OR); + if (expression->true_expression != NULL) { + print_string(" ? "); + print_expression_prec(expression->true_expression, PREC_EXPRESSION); + print_string(" : "); + } else { + print_string(" ?: "); + } + precedence_t prec = c_mode & _CXX ? PREC_ASSIGNMENT : PREC_CONDITIONAL; + print_expression_prec(expression->false_expression, prec); } +/** + * Prints a va_start expression. + * + * @param expression the va_start expression + */ +static void print_va_start(const va_start_expression_t *const expression) +{ + print_string("__builtin_va_start("); + print_assignment_expression(expression->ap); + print_string(", "); + print_string(expression->parameter->base.base.symbol->string); + print_char(')'); +} + +/** + * Prints a va_arg expression. + * + * @param expression the va_arg expression + */ static void print_va_arg(const va_arg_expression_t *expression) { - fputs("__builtin_va_arg(", out); - print_expression(expression->arg); - fputs(", ", out); - print_type(expression->expression.datatype); - fputs(")", out); + print_string("__builtin_va_arg("); + print_assignment_expression(expression->ap); + print_string(", "); + print_type(expression->base.type); + print_char(')'); } +/** + * Prints a va_copy expression. + * + * @param expression the va_copy expression + */ +static void print_va_copy(const va_copy_expression_t *expression) +{ + print_string("__builtin_va_copy("); + print_assignment_expression(expression->dst); + print_string(", "); + print_assignment_expression(expression->src); + print_char(')'); +} + +/** + * Prints a select expression (. or ->). + * + * @param expression the select expression + */ static void print_select(const select_expression_t *expression) { - print_expression(expression->compound); - if(expression->compound->base.datatype == NULL || - expression->compound->base.datatype->type == TYPE_POINTER) { - fputs("->", out); + print_expression_prec(expression->compound, PREC_POSTFIX); + /* do not print anything for anonymous struct/union selects + * FIXME: if the anonymous select was a '->' this will print '.' + */ + if (expression->compound_entry->base.symbol == NULL) + return; + + if (is_type_pointer(skip_typeref(expression->compound->base.type))) { + print_string("->"); } else { - fputc('.', out); + print_char('.'); } - fputs(expression->symbol->string, out); + print_string(expression->compound_entry->base.symbol->string); } +/** + * Prints a type classify expression. + * + * @param expr the type classify expression + */ static void print_classify_type_expression( const classify_type_expression_t *const expr) { - fputs("__builtin_classify_type(", out); - print_expression(expr->type_expression); - fputc(')', out); + print_string("__builtin_classify_type("); + print_assignment_expression(expr->type_expression); + print_char(')'); } -void print_expression(const expression_t *expression) +/** + * Prints a designator. + * + * @param designator the designator + */ +static void print_designator(const designator_t *designator) { - switch(expression->type) { - case EXPR_UNKNOWN: - case EXPR_INVALID: - fprintf(out, "*invalid expression*"); - break; - case EXPR_CONST: - print_const(&expression->conste); + for ( ; designator != NULL; designator = designator->next) { + if (designator->symbol == NULL) { + print_char('['); + print_expression(designator->array_index); + print_char(']'); + } else { + print_char('.'); + print_string(designator->symbol->string); + } + } +} + +/** + * Prints an offsetof expression. + * + * @param expression the offset expression + */ +static void print_offsetof_expression(const offsetof_expression_t *expression) +{ + print_string("__builtin_offsetof("); + print_type(expression->type); + print_char(','); + print_designator(expression->designator); + print_char(')'); +} + +/** + * Prints a statement expression. + * + * @param expression the statement expression + */ +static void print_statement_expression(const statement_expression_t *expression) +{ + print_char('('); + print_statement(expression->statement); + print_char(')'); +} + +/** + * Prints an expression with parenthesis if needed. + * + * @param expression the expression to print + * @param top_prec the precedence of the user of this expression. + */ +static void print_expression_prec(const expression_t *expression, unsigned top_prec) +{ + if (expression->kind == EXPR_UNARY_CAST + && expression->base.implicit && !print_implicit_casts) { + expression = expression->unary.value; + } + + bool parenthesized = + expression->base.parenthesized || + (print_parenthesis && top_prec != PREC_BOTTOM) || + top_prec > get_expression_precedence(expression->base.kind); + + if (parenthesized) + print_char('('); + switch (expression->kind) { + case EXPR_ERROR: + print_string("$error$"); break; - case EXPR_FUNCTION: - case EXPR_PRETTY_FUNCTION: + case EXPR_WIDE_STRING_LITERAL: case EXPR_STRING_LITERAL: - print_string_literal(&expression->string); + print_string_literal(&expression->string_literal); + break; + EXPR_LITERAL_CASES + print_literal(&expression->literal); + break; + case EXPR_FUNCNAME: + print_funcname(&expression->funcname); + break; + case EXPR_COMPOUND_LITERAL: + print_compound_literal(&expression->compound_literal); break; case EXPR_CALL: print_call_expression(&expression->call); break; - case EXPR_BINARY: + EXPR_BINARY_CASES print_binary_expression(&expression->binary); break; case EXPR_REFERENCE: + case EXPR_REFERENCE_ENUM_VALUE: print_reference_expression(&expression->reference); break; case EXPR_ARRAY_ACCESS: print_array_expression(&expression->array_access); break; - case EXPR_UNARY: + case EXPR_LABEL_ADDRESS: + print_label_address_expression(&expression->label_address); + break; + EXPR_UNARY_CASES print_unary_expression(&expression->unary); break; case EXPR_SIZEOF: - print_sizeof_expression(&expression->sizeofe); + case EXPR_ALIGNOF: + print_typeprop_expression(&expression->typeprop); break; - case EXPR_BUILTIN_SYMBOL: - print_builtin_symbol(&expression->builtin_symbol); + case EXPR_BUILTIN_CONSTANT_P: + print_builtin_constant(&expression->builtin_constant); + break; + case EXPR_BUILTIN_TYPES_COMPATIBLE_P: + print_builtin_types_compatible(&expression->builtin_types_compatible); break; case EXPR_CONDITIONAL: print_conditional(&expression->conditional); break; + case EXPR_VA_START: + print_va_start(&expression->va_starte); + break; case EXPR_VA_ARG: print_va_arg(&expression->va_arge); break; + case EXPR_VA_COPY: + print_va_copy(&expression->va_copye); + break; case EXPR_SELECT: print_select(&expression->select); break; case EXPR_CLASSIFY_TYPE: print_classify_type_expression(&expression->classify_type); break; - case EXPR_OFFSETOF: + print_offsetof_expression(&expression->offsetofe); + break; case EXPR_STATEMENT: - /* TODO */ - fprintf(out, "some expression of type %d", (int) expression->type); + print_statement_expression(&expression->statement); + break; + } + if (parenthesized) + print_char(')'); +} + +static void print_indented_statement(statement_t const *const stmt) +{ + switch (stmt->kind) { + case STATEMENT_LABEL: + break; + + case STATEMENT_CASE_LABEL: + for (int i = 0; i != case_indent; ++i) + print_char('\t'); + break; + + default: + print_indent(); break; } + print_statement(stmt); } +/** + * Print an compound statement. + * + * @param block the compound statement + */ static void print_compound_statement(const compound_statement_t *block) { - fputs("{\n", out); - indent++; + print_string("{\n"); + ++indent; statement_t *statement = block->statements; - while(statement != NULL) { - print_indent(); - print_statement(statement); + while (statement != NULL) { + print_indented_statement(statement); + print_char('\n'); statement = statement->base.next; } - indent--; + --indent; print_indent(); - fputs("}\n", out); + print_char('}'); } +/** + * Print a return statement. + * + * @param statement the return statement + */ static void print_return_statement(const return_statement_t *statement) { - fprintf(out, "return "); - if(statement->return_value != NULL) - print_expression(statement->return_value); - fputs(";\n", out); + expression_t const *const val = statement->value; + if (val != NULL) { + print_string("return "); + print_expression(val); + print_char(';'); + } else { + print_string("return;"); + } } +/** + * Print an expression statement. + * + * @param statement the expression statement + */ static void print_expression_statement(const expression_statement_t *statement) { print_expression(statement->expression); - fputs(";\n", out); + print_char(';'); } +/** + * Print a goto statement. + * + * @param statement the goto statement + */ static void print_goto_statement(const goto_statement_t *statement) { - fprintf(out, "goto "); - fputs(statement->label->symbol->string, out); - fprintf(stderr, "(%p)", (void*) statement->label); - fputs(";\n", out); + print_string("goto "); + if (statement->expression != NULL) { + print_char('*'); + print_expression(statement->expression); + } else { + print_string(statement->label->base.symbol->string); + } + print_char(';'); } +/** + * Print a label statement. + * + * @param statement the label statement + */ static void print_label_statement(const label_statement_t *statement) { - fprintf(stderr, "(%p)", (void*) statement->label); - fprintf(out, "%s:\n", statement->label->symbol->string); - if(statement->label_statement != NULL) { - print_statement(statement->label_statement); - } + print_format("%s:\n", statement->label->base.symbol->string); + print_indented_statement(statement->statement); } -static void print_if_statement(const if_statement_t *statement) +static void print_inner_statement(statement_t const *const stmt) { - fputs("if(", out); - print_expression(statement->condition); - fputs(") ", out); - if(statement->true_statement != NULL) { - print_statement(statement->true_statement); + if (stmt->kind == STATEMENT_COMPOUND) { + print_char(' '); + print_compound_statement(&stmt->compound); + } else { + print_char('\n'); + ++indent; + print_indented_statement(stmt); + --indent; } +} - if(statement->false_statement != NULL) { +static void print_after_inner_statement(statement_t const *const stmt) +{ + if (stmt->kind == STATEMENT_COMPOUND) { + print_char(' '); + } else { + print_char('\n'); print_indent(); - fputs("else ", out); - print_statement(statement->false_statement); } } +/** + * Print an if statement. + * + * @param statement the if statement + */ +static void print_if_statement(const if_statement_t *statement) +{ + print_string("if ("); + print_expression(statement->condition); + print_char(')'); + print_inner_statement(statement->true_statement); + + statement_t const *const f = statement->false_statement; + if (f) { + print_after_inner_statement(statement->true_statement); + print_string("else"); + if (f->kind == STATEMENT_IF) { + print_char(' '); + print_if_statement(&f->ifs); + } else { + print_inner_statement(f); + } + } +} + +/** + * Print a switch statement. + * + * @param statement the switch statement + */ static void print_switch_statement(const switch_statement_t *statement) { - fputs("switch(", out); + int const old_case_indent = case_indent; + case_indent = indent; + + print_string("switch ("); print_expression(statement->expression); - fputs(") ", out); - print_statement(statement->body); + print_char(')'); + print_inner_statement(statement->body); + + case_indent = old_case_indent; } +/** + * Print a case label (including the default label). + * + * @param statement the case label statement + */ static void print_case_label(const case_label_statement_t *statement) { - if(statement->expression == NULL) { - fputs("default:\n", out); + if (statement->expression == NULL) { + print_string("default:\n"); } else { - fputs("case ", out); + print_string("case "); print_expression(statement->expression); - fputs(":\n", out); + if (statement->end_range != NULL) { + print_string(" ... "); + print_expression(statement->end_range); + } + print_string(":\n"); } - print_statement(statement->label_statement); + print_indented_statement(statement->statement); +} + +static void print_typedef(const entity_t *entity) +{ + print_string("typedef "); + print_type_ext(entity->typedefe.type, entity->base.symbol, NULL); + print_char(';'); +} + +/** + * returns true if the entity is a compiler generated one and has no real + * correspondenc in the source file + */ +static bool is_generated_entity(const entity_t *entity) +{ + if (entity->kind == ENTITY_TYPEDEF) + return entity->typedefe.builtin; + + if (is_declaration(entity)) + return entity->declaration.implicit; + + return false; } +/** + * Print a declaration statement. + * + * @param statement the statement + */ static void print_declaration_statement( const declaration_statement_t *statement) { - int first = 1; - declaration_t *declaration = statement->declarations_begin; - for( ; declaration != statement->declarations_end->next; - declaration = declaration->next) { - if(!first) { + bool first = true; + entity_t *entity = statement->declarations_begin; + if (entity == NULL) { + print_string("/* empty declaration statement */"); + return; + } + + entity_t *const end = statement->declarations_end->base.next; + for (; entity != end; entity = entity->base.next) { + if (entity->kind == ENTITY_ENUM_VALUE) + continue; + if (is_generated_entity(entity)) + continue; + + if (!first) { + print_char('\n'); print_indent(); } else { - first = 0; + first = false; } - print_declaration(declaration); - fputc('\n', out); + + print_entity(entity); } } +/** + * Print a while statement. + * + * @param statement the statement + */ static void print_while_statement(const while_statement_t *statement) { - fputs("while(", out); + print_string("while ("); print_expression(statement->condition); - fputs(") ", out); - print_statement(statement->body); + print_char(')'); + print_inner_statement(statement->body); } +/** + * Print a do-while statement. + * + * @param statement the statement + */ static void print_do_while_statement(const do_while_statement_t *statement) { - fputs("do ", out); - print_statement(statement->body); - print_indent(); - fputs("while(", out); + print_string("do"); + print_inner_statement(statement->body); + print_after_inner_statement(statement->body); + print_string("while ("); print_expression(statement->condition); - fputs(");\n", out); + print_string(");"); } +/** + * Print a for statement. + * + * @param statement the statement + */ static void print_for_statement(const for_statement_t *statement) { - fputs("for(", out); - if(statement->context.declarations != NULL) { - assert(statement->initialisation == NULL); - print_declaration(statement->context.declarations); - if(statement->context.declarations->next != NULL) { - panic("multiple declarations in for statement not supported yet"); - } - fputc(' ', out); + print_string("for ("); + if (statement->initialisation != NULL) { + print_expression(statement->initialisation); + print_char(';'); } else { - if(statement->initialisation) { - print_expression(statement->initialisation); + entity_t const *entity = statement->scope.entities; + for (; entity != NULL; entity = entity->base.next) { + if (is_generated_entity(entity)) + continue; + /* FIXME display of multiple declarations is wrong */ + print_declaration(entity); } - fputs("; ", out); } - if(statement->condition != NULL) { + if (statement->condition != NULL) { + print_char(' '); print_expression(statement->condition); } - fputs("; ", out); - if(statement->step != NULL) { + print_char(';'); + if (statement->step != NULL) { + print_char(' '); print_expression(statement->step); } - fputs(")", out); - print_statement(statement->body); + print_char(')'); + print_inner_statement(statement->body); } -static void print_asm_constraints(asm_constraint_t *constraints) +/** + * Print assembler arguments. + * + * @param arguments the arguments + */ +static void print_asm_arguments(asm_argument_t *arguments) { - asm_constraint_t *constraint = constraints; - for( ; constraint != NULL; constraint = constraint->next) { - if(constraint != constraints) - fputs(", ", out); + asm_argument_t *argument = arguments; + for (; argument != NULL; argument = argument->next) { + if (argument != arguments) + print_string(", "); - if(constraint->symbol) { - fprintf(out, "[%s] ", constraint->symbol->string); + if (argument->symbol) { + print_format("[%s] ", argument->symbol->string); } - print_quoted_string(constraint->constraints); - fputs(" (", out); - print_expression(constraint->expression); - fputs(")", out); + print_quoted_string(&argument->constraints, '"', 1); + print_string(" ("); + print_expression(argument->expression); + print_char(')'); } } +/** + * Print assembler clobbers. + * + * @param clobbers the clobbers + */ static void print_asm_clobbers(asm_clobber_t *clobbers) { asm_clobber_t *clobber = clobbers; - for( ; clobber != NULL; clobber = clobber->next) { - if(clobber != clobbers) - fputs(", ", out); + for (; clobber != NULL; clobber = clobber->next) { + if (clobber != clobbers) + print_string(", "); - print_quoted_string(clobber->clobber); + print_quoted_string(&clobber->clobber, '"', 1); } } +/** + * Print an assembler statement. + * + * @param statement the statement + */ static void print_asm_statement(const asm_statement_t *statement) { - fputs("asm", out); - if(statement->is_volatile) { - fputs(" volatile", out); + print_string("asm "); + if (statement->is_volatile) { + print_string("volatile "); } - fputs("(", out); - print_quoted_string(statement->asm_text); - if(statement->inputs == NULL && statement->outputs == NULL - && statement->clobbers == NULL) + print_char('('); + print_quoted_string(&statement->asm_text, '"', 1); + if (statement->outputs == NULL && + statement->inputs == NULL && + statement->clobbers == NULL) goto end_of_print_asm_statement; - fputs(" : ", out); - print_asm_constraints(statement->inputs); - if(statement->outputs == NULL && statement->clobbers == NULL) + print_string(" : "); + print_asm_arguments(statement->outputs); + if (statement->inputs == NULL && statement->clobbers == NULL) goto end_of_print_asm_statement; - fputs(": ", out); - print_asm_constraints(statement->outputs); - if(statement->clobbers == NULL) + print_string(" : "); + print_asm_arguments(statement->inputs); + if (statement->clobbers == NULL) goto end_of_print_asm_statement; - fputs(": ", out); + print_string(" : "); print_asm_clobbers(statement->clobbers); end_of_print_asm_statement: - fputs(");\n", out); + print_string(");"); } +/** + * Print a microsoft __try statement. + * + * @param statement the statement + */ +static void print_ms_try_statement(const ms_try_statement_t *statement) +{ + print_string("__try"); + print_inner_statement(statement->try_statement); + print_after_inner_statement(statement->try_statement); + if (statement->except_expression != NULL) { + print_string("__except("); + print_expression(statement->except_expression); + print_char(')'); + } else { + print_string("__finally"); + } + print_inner_statement(statement->final_statement); +} + +/** + * Print a microsoft __leave statement. + * + * @param statement the statement + */ +static void print_leave_statement(const leave_statement_t *statement) +{ + (void)statement; + print_string("__leave;"); +} + +/** + * Print a statement. + * + * @param statement the statement + */ void print_statement(const statement_t *statement) { - switch(statement->type) { + switch (statement->kind) { + case STATEMENT_EMPTY: + print_char(';'); + break; case STATEMENT_COMPOUND: print_compound_statement(&statement->compound); break; @@ -535,10 +1187,10 @@ void print_statement(const statement_t *statement) print_goto_statement(&statement->gotos); break; case STATEMENT_CONTINUE: - fputs("continue;\n", out); + print_string("continue;"); break; case STATEMENT_BREAK: - fputs("break;\n", out); + print_string("break;"); break; case STATEMENT_IF: print_if_statement(&statement->ifs); @@ -564,141 +1216,795 @@ void print_statement(const statement_t *statement) case STATEMENT_ASM: print_asm_statement(&statement->asms); break; - case STATEMENT_INVALID: - fprintf(out, "*invalid statement*"); + case STATEMENT_MS_TRY: + print_ms_try_statement(&statement->ms_try); + break; + case STATEMENT_LEAVE: + print_leave_statement(&statement->leave); + break; + case STATEMENT_ERROR: + print_string("$error statement$"); break; } } -static void print_storage_class(unsigned storage_class) +/** + * Print a storage class. + * + * @param storage_class the storage class + */ +static void print_storage_class(storage_class_tag_t storage_class) { - switch((storage_class_tag_t) storage_class) { - case STORAGE_CLASS_ENUM_ENTRY: - case STORAGE_CLASS_NONE: - break; - case STORAGE_CLASS_TYPEDEF: fputs("typedef ", out); break; - case STORAGE_CLASS_EXTERN: fputs("extern ", out); break; - case STORAGE_CLASS_STATIC: fputs("static ", out); break; - case STORAGE_CLASS_AUTO: fputs("auto ", out); break; - case STORAGE_CLASS_REGISTER: fputs("register ", out); break; - case STORAGE_CLASS_THREAD: fputs("__thread", out); break; - case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break; - case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break; + switch (storage_class) { + case STORAGE_CLASS_NONE: return; + case STORAGE_CLASS_TYPEDEF: print_string("typedef "); return; + case STORAGE_CLASS_EXTERN: print_string("extern "); return; + case STORAGE_CLASS_STATIC: print_string("static "); return; + case STORAGE_CLASS_AUTO: print_string("auto "); return; + case STORAGE_CLASS_REGISTER: print_string("register "); return; } + panic("invalid storage class"); } +/** + * Print an initializer. + * + * @param initializer the initializer + */ void print_initializer(const initializer_t *initializer) { - if(initializer->type == INITIALIZER_VALUE) { + if (initializer == NULL) { + print_string("{}"); + return; + } + + switch (initializer->kind) { + case INITIALIZER_VALUE: { const initializer_value_t *value = &initializer->value; - print_expression(value->value); + print_assignment_expression(value->value); return; } + case INITIALIZER_LIST: { + assert(initializer->kind == INITIALIZER_LIST); + print_string("{ "); + const initializer_list_t *list = &initializer->list; + + for (size_t i = 0 ; i < list->len; ++i) { + const initializer_t *sub_init = list->initializers[i]; + print_initializer(list->initializers[i]); + if (i < list->len-1) { + if (sub_init == NULL || sub_init->kind != INITIALIZER_DESIGNATOR) + print_string(", "); + } + } + print_string(" }"); + return; + } + case INITIALIZER_STRING: + print_quoted_string(&initializer->string.string, '"', 1); + return; + case INITIALIZER_WIDE_STRING: + print_quoted_string(&initializer->string.string, '"', 1); + return; + case INITIALIZER_DESIGNATOR: + print_designator(initializer->designator.designator); + print_string(" = "); + return; + } + + panic("invalid initializer kind found"); +} + +#if 0 +/** + * Print microsoft extended declaration modifiers. + */ +static void print_ms_modifiers(const declaration_t *declaration) +{ + if ((c_mode & _MS) == 0) + return; + + decl_modifiers_t modifiers = declaration->modifiers; - assert(initializer->type == INITIALIZER_LIST); - fputs("{ ", out); - const initializer_list_t *list = &initializer->list; + bool ds_shown = false; + const char *next = "("; + + if (declaration->base.kind == ENTITY_VARIABLE) { + variable_t *variable = (variable_t*)declaration; + if (variable->alignment != 0 + || variable->get_property_sym != NULL + || variable->put_property_sym != NULL) { + if (!ds_shown) { + print_string("__declspec"); + ds_shown = true; + } - for(size_t i = 0 ; i < list->len; ++i) { - if(i > 0) { - fputs(", ", out); + if (variable->alignment != 0) { + print_string(next); next = ", "; print_format("align(%u)", variable->alignment); + } + if (variable->get_property_sym != NULL + || variable->put_property_sym != NULL) { + char *comma = ""; + print_string(next); next = ", "; print_string("property("); + if (variable->get_property_sym != NULL) { + print_format("get=%s", variable->get_property_sym->string); + comma = ", "; + } + if (variable->put_property_sym != NULL) + print_format("%sput=%s", comma, variable->put_property_sym->string); + print_char(')'); + } + } + } + + /* DM_FORCEINLINE handled outside. */ + if ((modifiers & ~DM_FORCEINLINE) != 0) { + if (!ds_shown) { + print_string("__declspec"); + ds_shown = true; + } + if (modifiers & DM_DLLIMPORT) { + print_string(next); next = ", "; print_string("dllimport"); + } + if (modifiers & DM_DLLEXPORT) { + print_string(next); next = ", "; print_string("dllexport"); + } + if (modifiers & DM_THREAD) { + print_string(next); next = ", "; print_string("thread"); + } + if (modifiers & DM_NAKED) { + print_string(next); next = ", "; print_string("naked"); + } + if (modifiers & DM_THREAD) { + print_string(next); next = ", "; print_string("thread"); + } + if (modifiers & DM_SELECTANY) { + print_string(next); next = ", "; print_string("selectany"); + } + if (modifiers & DM_NOTHROW) { + print_string(next); next = ", "; print_string("nothrow"); + } + if (modifiers & DM_NORETURN) { + print_string(next); next = ", "; print_string("noreturn"); + } + if (modifiers & DM_NOINLINE) { + print_string(next); next = ", "; print_string("noinline"); + } + if (modifiers & DM_DEPRECATED) { + print_string(next); next = ", "; print_string("deprecated"); + if (declaration->deprecated_string != NULL) + print_format("(\"%s\")", + declaration->deprecated_string); + } + if (modifiers & DM_RESTRICT) { + print_string(next); next = ", "; print_string("restrict"); + } + if (modifiers & DM_NOALIAS) { + print_string(next); next = ", "; print_string("noalias"); } - print_initializer(list->initializers[i]); } - fputs("}", out); + + if (ds_shown) + print_string(") "); } +#endif -static void print_normal_declaration(const declaration_t *declaration) +static void print_scope(const scope_t *scope) { - print_storage_class(declaration->storage_class); - if(declaration->is_inline) { - fputs("inline ", out); + const entity_t *entity = scope->entities; + for ( ; entity != NULL; entity = entity->base.next) { + print_indent(); + print_entity(entity); + print_char('\n'); } - print_type_ext(declaration->type, declaration->symbol, - &declaration->context); +} - if(declaration->type->type == TYPE_FUNCTION) { - if(declaration->init.statement != NULL) { - fputs("\n", out); - print_statement(declaration->init.statement); - return; +static void print_namespace(const namespace_t *namespace) +{ + print_string("namespace "); + if (namespace->base.symbol != NULL) { + print_string(namespace->base.symbol->string); + print_char(' '); + } + + print_string("{\n"); + ++indent; + + print_scope(&namespace->members); + + --indent; + print_indent(); + print_string("}\n"); +} + +/** + * Print a variable or function declaration + */ +void print_declaration(const entity_t *entity) +{ + assert(is_declaration(entity)); + const declaration_t *declaration = &entity->declaration; + + print_storage_class((storage_class_tag_t)declaration->declared_storage_class); + if (entity->kind == ENTITY_FUNCTION) { + function_t *function = (function_t*)declaration; + if (function->is_inline) { + if (declaration->modifiers & DM_FORCEINLINE) { + print_string("__forceinline "); + } else if (declaration->modifiers & DM_MICROSOFT_INLINE) { + print_string("__inline "); + } else { + print_string("inline "); + } } - } else if(declaration->init.initializer != NULL) { - fputs(" = ", out); - print_initializer(declaration->init.initializer); } - fputc(';', out); + //print_ms_modifiers(declaration); + switch (entity->kind) { + case ENTITY_FUNCTION: + print_type_ext(entity->declaration.type, entity->base.symbol, + &entity->function.parameters); + + if (entity->function.statement != NULL) { + print_char('\n'); + print_indented_statement(entity->function.statement); + print_char('\n'); + return; + } + break; + + case ENTITY_VARIABLE: + if (entity->variable.thread_local) + print_string("__thread "); + print_type_ext(declaration->type, declaration->base.symbol, NULL); + if (entity->variable.initializer != NULL) { + print_string(" = "); + print_initializer(entity->variable.initializer); + } + break; + + case ENTITY_COMPOUND_MEMBER: + print_type_ext(declaration->type, declaration->base.symbol, NULL); + if (entity->compound_member.bitfield) { + print_format(" : %u", entity->compound_member.bit_size); + } + break; + + default: + print_type_ext(declaration->type, declaration->base.symbol, NULL); + break; + } + print_char(';'); } -void print_declaration(const declaration_t *declaration) +/** + * Prints an expression. + * + * @param expression the expression + */ +void print_expression(const expression_t *expression) +{ + print_expression_prec(expression, PREC_BOTTOM); +} + +/** + * Print a declaration. + * + * @param declaration the declaration + */ +void print_entity(const entity_t *entity) { - if(declaration->namespc != NAMESPACE_NORMAL && - declaration->symbol == NULL) + if (entity->base.namespc != NAMESPACE_NORMAL && entity->base.symbol == NULL) return; - switch(declaration->namespc) { - case NAMESPACE_NORMAL: - print_normal_declaration(declaration); - break; - case NAMESPACE_STRUCT: - fputs("struct ", out); - fputs(declaration->symbol->string, out); - fputc(' ', out); - print_compound_definition(declaration); - fputc(';', out); - break; - case NAMESPACE_UNION: - fputs("union ", out); - fputs(declaration->symbol->string, out); - fputc(' ', out); - print_compound_definition(declaration); - fputc(';', out); - break; - case NAMESPACE_ENUM: - fputs("enum ", out); - fputs(declaration->symbol->string, out); - fputc(' ', out); - print_enum_definition(declaration); - fputc(';', out); - break; + switch ((entity_kind_tag_t)entity->kind) { + case ENTITY_VARIABLE: + case ENTITY_PARAMETER: + case ENTITY_COMPOUND_MEMBER: + case ENTITY_FUNCTION: + print_declaration(entity); + return; + case ENTITY_TYPEDEF: + print_typedef(entity); + return; + case ENTITY_CLASS: + /* TODO */ + print_string("class "); + print_string(entity->base.symbol->string); + print_string("; /* TODO */\n"); + return; + case ENTITY_STRUCT: + print_string("struct "); + goto print_compound; + case ENTITY_UNION: + print_string("union "); +print_compound: + print_string(entity->base.symbol->string); + if (entity->compound.complete) { + print_char(' '); + print_compound_definition(&entity->compound); + } + print_char(';'); + return; + case ENTITY_ENUM: + print_string("enum "); + print_string(entity->base.symbol->string); + print_char(' '); + print_enum_definition(&entity->enume); + print_char(';'); + return; + case ENTITY_NAMESPACE: + print_namespace(&entity->namespacee); + return; + case ENTITY_LOCAL_LABEL: + print_string("__label__ "); + print_string(entity->base.symbol->string); + print_char(';'); + return; + case ENTITY_LABEL: + case ENTITY_ENUM_VALUE: + panic("print_entity used on unexpected entity type"); } + panic("Invalid entity type encountered"); } +/** + * Print the AST of a translation unit. + * + * @param unit the translation unit + */ void print_ast(const translation_unit_t *unit) { - inc_type_visited(); - - declaration_t *declaration = unit->context.declarations; - for( ; declaration != NULL; declaration = declaration->next) { - if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) + entity_t *entity = unit->scope.entities; + for ( ; entity != NULL; entity = entity->base.next) { + if (entity->kind == ENTITY_ENUM_VALUE) + continue; + if (entity->base.namespc != NAMESPACE_NORMAL + && entity->base.symbol == NULL) continue; - if(declaration->namespc != NAMESPACE_NORMAL && - declaration->symbol == NULL) + if (is_generated_entity(entity)) continue; print_indent(); - print_declaration(declaration); - fputc('\n', out); + print_entity(entity); + print_char('\n'); } } -void init_ast(void) +expression_classification_t is_constant_initializer(const initializer_t *initializer) { - obstack_init(&ast_obstack); + switch (initializer->kind) { + case INITIALIZER_STRING: + case INITIALIZER_WIDE_STRING: + case INITIALIZER_DESIGNATOR: + return EXPR_CLASS_CONSTANT; + + case INITIALIZER_VALUE: + return is_linker_constant(initializer->value.value); + + case INITIALIZER_LIST: { + expression_classification_t all = EXPR_CLASS_CONSTANT; + for (size_t i = 0; i < initializer->list.len; ++i) { + initializer_t *sub_initializer = initializer->list.initializers[i]; + expression_classification_t const cur = is_constant_initializer(sub_initializer); + if (all > cur) { + all = cur; + } + } + return all; + } + } + panic("invalid initializer kind found"); } -void exit_ast(void) +/** + * Checks if an expression references an object with a constant/known location + * to the linker. Example: + * - "x", "*&x" with x being a global variable. The value of x need not be + * constant but the address of x is. + * - "a.b.c" when a has a constant/known location to the linker + */ +static expression_classification_t is_object_with_linker_constant_address( + const expression_t *expression) { - obstack_free(&ast_obstack, NULL); + switch (expression->kind) { + case EXPR_UNARY_DEREFERENCE: + return is_linker_constant(expression->unary.value); + + case EXPR_SELECT: { + type_t *base_type = skip_typeref(expression->select.compound->base.type); + if (is_type_pointer(base_type)) { + /* it's a -> */ + return is_linker_constant(expression->select.compound); + } else { + return is_object_with_linker_constant_address(expression->select.compound); + } + } + + case EXPR_ARRAY_ACCESS: { + expression_classification_t const ref = is_linker_constant(expression->array_access.array_ref); + expression_classification_t const idx = is_constant_expression(expression->array_access.index); + return ref < idx ? ref : idx; + } + + case EXPR_REFERENCE: { + entity_t *entity = expression->reference.entity; + if (!is_declaration(entity)) + return EXPR_CLASS_VARIABLE; + + switch ((storage_class_tag_t)entity->declaration.storage_class) { + case STORAGE_CLASS_NONE: + case STORAGE_CLASS_EXTERN: + case STORAGE_CLASS_STATIC: + return + entity->kind != ENTITY_VARIABLE || + !entity->variable.thread_local ? EXPR_CLASS_CONSTANT : + EXPR_CLASS_VARIABLE; + + case STORAGE_CLASS_REGISTER: + case STORAGE_CLASS_TYPEDEF: + case STORAGE_CLASS_AUTO: + break; + } + return EXPR_CLASS_VARIABLE; + } + + case EXPR_ERROR: + return EXPR_CLASS_ERROR; + + default: + return EXPR_CLASS_VARIABLE; + } } -void ast_set_output(FILE *stream) +expression_classification_t is_linker_constant(const expression_t *expression) { - out = stream; - type_set_output(stream); + switch (expression->kind) { + case EXPR_STRING_LITERAL: + case EXPR_WIDE_STRING_LITERAL: + case EXPR_FUNCNAME: + case EXPR_LABEL_ADDRESS: + return EXPR_CLASS_CONSTANT; + + case EXPR_COMPOUND_LITERAL: + return is_constant_initializer(expression->compound_literal.initializer); + + case EXPR_UNARY_TAKE_ADDRESS: + return is_object_with_linker_constant_address(expression->unary.value); + + case EXPR_UNARY_DEREFERENCE: { + type_t *real_type + = revert_automatic_type_conversion(expression->unary.value); + /* dereferencing a function is a NOP */ + if (is_type_function(real_type)) { + return is_linker_constant(expression->unary.value); + } + /* FALLTHROUGH */ + } + + case EXPR_UNARY_CAST: { + type_t *dest = skip_typeref(expression->base.type); + if (!is_type_pointer(dest) && ( + dest->kind != TYPE_ATOMIC || + !(get_atomic_type_flags(dest->atomic.akind) & ATOMIC_TYPE_FLAG_INTEGER) || + get_atomic_type_size(dest->atomic.akind) < get_type_size(type_void_ptr) + )) + return is_constant_expression(expression); + + return is_linker_constant(expression->unary.value); + } + + case EXPR_BINARY_ADD: + case EXPR_BINARY_SUB: { + expression_t *const left = expression->binary.left; + expression_t *const right = expression->binary.right; + type_t *const ltype = skip_typeref(left->base.type); + type_t *const rtype = skip_typeref(right->base.type); + + if (is_type_pointer(ltype)) { + expression_classification_t const l = is_linker_constant(left); + expression_classification_t const r = is_constant_expression(right); + return l < r ? l : r; + } else if (is_type_pointer(rtype)) { + expression_classification_t const l = is_constant_expression(left); + expression_classification_t const r = is_linker_constant(right); + return l < r ? l : r; + } else if (!is_type_valid(ltype) || !is_type_valid(rtype)) { + return EXPR_CLASS_ERROR; + } else { + return is_constant_expression(expression); + } + } + + case EXPR_REFERENCE: { + entity_t *entity = expression->reference.entity; + if (!is_declaration(entity)) + return EXPR_CLASS_VARIABLE; + + type_t *type = skip_typeref(entity->declaration.type); + if (is_type_function(type)) + return EXPR_CLASS_CONSTANT; + if (is_type_array(type)) { + return is_object_with_linker_constant_address(expression); + } + /* Prevent stray errors */ + if (!is_type_valid(type)) + return EXPR_CLASS_ERROR; + return EXPR_CLASS_VARIABLE; + } + + case EXPR_ARRAY_ACCESS: { + type_t *const type = + skip_typeref(revert_automatic_type_conversion(expression)); + if (!is_type_array(type)) + return EXPR_CLASS_VARIABLE; + return is_linker_constant(expression->array_access.array_ref); + } + + case EXPR_CONDITIONAL: { + expression_t *const c = expression->conditional.condition; + expression_classification_t const cclass = is_constant_expression(c); + if (cclass != EXPR_CLASS_CONSTANT) + return cclass; + + if (fold_constant_to_bool(c)) { + expression_t const *const t = expression->conditional.true_expression; + return is_linker_constant(t != NULL ? t : c); + } else { + return is_linker_constant(expression->conditional.false_expression); + } + } + + case EXPR_SELECT: { + entity_t *entity = expression->select.compound_entry; + if (!is_declaration(entity)) + return EXPR_CLASS_VARIABLE; + type_t *type = skip_typeref(entity->declaration.type); + if (is_type_array(type)) { + /* arrays automatically convert to their address */ + expression_t *compound = expression->select.compound; + type_t *base_type = skip_typeref(compound->base.type); + if (is_type_pointer(base_type)) { + /* it's a -> */ + return is_linker_constant(compound); + } else { + return is_object_with_linker_constant_address(compound); + } + } + return EXPR_CLASS_VARIABLE; + } + + default: + return is_constant_expression(expression); + } +} + +/** + * Check if the given expression is a call to a builtin function + * returning a constant result. + */ +static expression_classification_t is_builtin_const_call(const expression_t *expression) +{ + expression_t *function = expression->call.function; + if (function->kind != EXPR_REFERENCE) + return EXPR_CLASS_VARIABLE; + reference_expression_t *ref = &function->reference; + if (ref->entity->kind != ENTITY_FUNCTION) + return EXPR_CLASS_VARIABLE; + + switch (ref->entity->function.btk) { + case BUILTIN_INF: + case BUILTIN_NAN: + return EXPR_CLASS_CONSTANT; + default: + return EXPR_CLASS_VARIABLE; + } + +} + +static expression_classification_t is_constant_pointer(const expression_t *expression) +{ + expression_classification_t const expr_class = is_constant_expression(expression); + if (expr_class != EXPR_CLASS_VARIABLE) + return expr_class; + + switch (expression->kind) { + case EXPR_UNARY_CAST: + return is_constant_pointer(expression->unary.value); + default: + return EXPR_CLASS_VARIABLE; + } +} + +static expression_classification_t is_object_with_constant_address(const expression_t *expression) +{ + switch (expression->kind) { + case EXPR_SELECT: { + expression_t *compound = expression->select.compound; + type_t *compound_type = compound->base.type; + compound_type = skip_typeref(compound_type); + if (is_type_pointer(compound_type)) { + return is_constant_pointer(compound); + } else { + return is_object_with_constant_address(compound); + } + } + + case EXPR_ARRAY_ACCESS: { + array_access_expression_t const* const array_access = + &expression->array_access; + expression_classification_t const idx_class = is_constant_expression(array_access->index); + if (idx_class != EXPR_CLASS_CONSTANT) + return idx_class; + expression_classification_t const ref_addr = is_object_with_constant_address(array_access->array_ref); + expression_classification_t const ref_ptr = is_constant_pointer(array_access->array_ref); + return ref_addr > ref_ptr ? ref_addr : ref_ptr; + } + + case EXPR_UNARY_DEREFERENCE: + return is_constant_pointer(expression->unary.value); + + case EXPR_ERROR: + return EXPR_CLASS_ERROR; + + default: + return EXPR_CLASS_VARIABLE; + } +} + +expression_classification_t is_constant_expression(const expression_t *expression) +{ + switch (expression->kind) { + EXPR_LITERAL_CASES + case EXPR_CLASSIFY_TYPE: + case EXPR_OFFSETOF: + case EXPR_ALIGNOF: + case EXPR_BUILTIN_CONSTANT_P: + case EXPR_BUILTIN_TYPES_COMPATIBLE_P: + case EXPR_REFERENCE_ENUM_VALUE: + return EXPR_CLASS_CONSTANT; + + case EXPR_SIZEOF: { + type_t *const type = skip_typeref(expression->typeprop.type); + return + !is_type_array(type) || !type->array.is_vla ? EXPR_CLASS_CONSTANT : + EXPR_CLASS_VARIABLE; + } + + case EXPR_STRING_LITERAL: + case EXPR_WIDE_STRING_LITERAL: + case EXPR_FUNCNAME: + case EXPR_LABEL_ADDRESS: + case EXPR_SELECT: + case EXPR_VA_START: + case EXPR_VA_ARG: + case EXPR_VA_COPY: + case EXPR_STATEMENT: + case EXPR_UNARY_POSTFIX_INCREMENT: + case EXPR_UNARY_POSTFIX_DECREMENT: + case EXPR_UNARY_PREFIX_INCREMENT: + case EXPR_UNARY_PREFIX_DECREMENT: + case EXPR_UNARY_ASSUME: /* has VOID type */ + case EXPR_UNARY_DEREFERENCE: + case EXPR_UNARY_DELETE: + case EXPR_UNARY_DELETE_ARRAY: + case EXPR_UNARY_THROW: + case EXPR_BINARY_ASSIGN: + case EXPR_BINARY_MUL_ASSIGN: + case EXPR_BINARY_DIV_ASSIGN: + case EXPR_BINARY_MOD_ASSIGN: + case EXPR_BINARY_ADD_ASSIGN: + case EXPR_BINARY_SUB_ASSIGN: + case EXPR_BINARY_SHIFTLEFT_ASSIGN: + case EXPR_BINARY_SHIFTRIGHT_ASSIGN: + case EXPR_BINARY_BITWISE_AND_ASSIGN: + case EXPR_BINARY_BITWISE_XOR_ASSIGN: + case EXPR_BINARY_BITWISE_OR_ASSIGN: + case EXPR_BINARY_COMMA: + case EXPR_ARRAY_ACCESS: + return EXPR_CLASS_VARIABLE; + + case EXPR_REFERENCE: { + type_t *const type = skip_typeref(expression->base.type); + return is_type_valid(type) ? EXPR_CLASS_VARIABLE : EXPR_CLASS_ERROR; + } + + case EXPR_UNARY_TAKE_ADDRESS: + return is_object_with_constant_address(expression->unary.value); + + case EXPR_CALL: + return is_builtin_const_call(expression); + + case EXPR_UNARY_NEGATE: + case EXPR_UNARY_PLUS: + case EXPR_UNARY_BITWISE_NEGATE: + case EXPR_UNARY_NOT: + return is_constant_expression(expression->unary.value); + + case EXPR_UNARY_CAST: { + type_t *const type = skip_typeref(expression->base.type); + if (is_type_scalar(type)) + return is_constant_expression(expression->unary.value); + if (!is_type_valid(type)) + return EXPR_CLASS_ERROR; + return EXPR_CLASS_VARIABLE; + } + + case EXPR_BINARY_ADD: + case EXPR_BINARY_SUB: + case EXPR_BINARY_MUL: + case EXPR_BINARY_DIV: + case EXPR_BINARY_MOD: + case EXPR_BINARY_EQUAL: + case EXPR_BINARY_NOTEQUAL: + case EXPR_BINARY_LESS: + case EXPR_BINARY_LESSEQUAL: + case EXPR_BINARY_GREATER: + case EXPR_BINARY_GREATEREQUAL: + case EXPR_BINARY_BITWISE_AND: + case EXPR_BINARY_BITWISE_OR: + case EXPR_BINARY_BITWISE_XOR: + case EXPR_BINARY_SHIFTLEFT: + case EXPR_BINARY_SHIFTRIGHT: + case EXPR_BINARY_ISGREATER: + case EXPR_BINARY_ISGREATEREQUAL: + case EXPR_BINARY_ISLESS: + case EXPR_BINARY_ISLESSEQUAL: + case EXPR_BINARY_ISLESSGREATER: + case EXPR_BINARY_ISUNORDERED: { + expression_classification_t const l = is_constant_expression(expression->binary.left); + expression_classification_t const r = is_constant_expression(expression->binary.right); + return l < r ? l : r; + } + + case EXPR_BINARY_LOGICAL_AND: { + expression_t const *const left = expression->binary.left; + expression_classification_t const lclass = is_constant_expression(left); + if (lclass != EXPR_CLASS_CONSTANT) + return lclass; + if (!fold_constant_to_bool(left)) + return EXPR_CLASS_CONSTANT; + return is_constant_expression(expression->binary.right); + } + + case EXPR_BINARY_LOGICAL_OR: { + expression_t const *const left = expression->binary.left; + expression_classification_t const lclass = is_constant_expression(left); + if (lclass != EXPR_CLASS_CONSTANT) + return lclass; + if (fold_constant_to_bool(left)) + return EXPR_CLASS_CONSTANT; + return is_constant_expression(expression->binary.right); + } + + case EXPR_COMPOUND_LITERAL: + return is_constant_initializer(expression->compound_literal.initializer); + + case EXPR_CONDITIONAL: { + expression_t *const condition = expression->conditional.condition; + expression_classification_t const cclass = is_constant_expression(condition); + if (cclass != EXPR_CLASS_CONSTANT) + return cclass; + + if (fold_constant_to_bool(condition)) { + expression_t const *const t = expression->conditional.true_expression; + return t == NULL ? EXPR_CLASS_CONSTANT : is_constant_expression(t); + } else { + return is_constant_expression(expression->conditional.false_expression); + } + } + + case EXPR_ERROR: + return EXPR_CLASS_ERROR; + } + panic("invalid expression found (is constant expression)"); +} + +void init_ast(void) +{ + obstack_init(&ast_obstack); } -void* (allocate_ast) (size_t size) +void exit_ast(void) { - return _allocate_ast(size); + obstack_free(&ast_obstack, NULL); }