+/*
+ * This file is part of cparser.
+ * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
+ *
+ * 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 <config.h>
#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 <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
+#if defined(__INTEL_COMPILER)
+#include <mathimf.h>
+#elif defined(__CYGWIN__)
+#include "win32/cygwin_math_ext.h"
+#else
+#include <math.h>
+#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)
{
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_CAST_IMPLICIT:
- print_expression(unexpr->value);
+ case EXPR_UNARY_ASSUME:
+ print_string("__assume(");
+ print_assignment_expression(unexpr->value);
+ print_char(')');
return;
- case UNEXPR_INVALID:
- fprintf(out, "unop%d", (int) unexpr->type);
+
+ 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 {
+ 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 {
- fputc('(', out);
+ 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)
{
- fputs(expression->symbol->string, out);
+ 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)
+{
+ 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_CONSTANT_P:
+ print_builtin_constant(&expression->builtin_constant);
break;
- case EXPR_BUILTIN_SYMBOL:
- print_builtin_symbol(&expression->builtin_symbol);
+ 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;
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);
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;
+
+ 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;
+ }
- assert(initializer->type == INITIALIZER_LIST);
- fputs("{ ", out);
- const initializer_list_t *list = &initializer->list;
+ 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(')');
+ }
+ }
+ }
- for(size_t i = 0 ; i < list->len; ++i) {
- if(i > 0) {
- fputs(", ", out);
+ /* 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);
}
projects / cparser / blobdiff