X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=50eaec37816cb01663d20f0e49a3683bb3f88914;hb=564a3cdfed70f6e7d7c75fa693ea2630b82cb8aa;hp=f2bc587276ce9cf94d27398a2826150593b4175c;hpb=3e3bf65b33ece40f474c91dac37cf8ea716a5b03;p=cparser diff --git a/ast.c b/ast.c index f2bc587..50eaec3 100644 --- a/ast.c +++ b/ast.c @@ -1,11 +1,34 @@ +/* + * This file is part of cparser. + * Copyright (C) 2007-2008 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 #include #include +#include #include "adt/error.h" @@ -14,31 +37,312 @@ struct obstack ast_obstack; static FILE *out; static int indent; +/** If set, implicit casts are printed. */ +bool print_implicit_casts = false; + +/** If set parenthesis are printed to indicate operator precedence. */ +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) +{ + indent += delta; + assert(indent >= 0); +} -static void print_indent(void) +void print_indent(void) { for(int i = 0; i < indent; ++i) fprintf(out, "\t"); } -static -void print_const(const const_t *cnst) +enum precedence_t { + PREC_BOTTOM = 0, + PREC_COMMA = 2, /* , left to right */ + PREC_ASSIGN = 4, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */ + PREC_COND = 6, /* ?: right to left */ + PREC_LOG_OR = 8, /* || left to right */ + PREC_LOG_AND = 10, /* && left to right */ + PREC_BIT_OR = 12, /* | left to right */ + PREC_BIT_XOR = 14, /* ^ left to right */ + PREC_BIT_AND = 16, /* & left to right */ + PREC_EQ = 18, /* == != left to right */ + PREC_CMP = 20, /* < <= > >= left to right */ + PREC_SHF = 22, /* << >> left to right */ + PREC_PLUS = 24, /* + - left to right */ + PREC_MUL = 26, /* * / % left to right */ + PREC_UNARY = 28, /* ! ~ ++ -- + - (type) * & sizeof right to left */ + PREC_ACCESS = 30, /* () [] -> . left to right */ + PREC_PRIM = 32, /* primary */ + PREC_TOP = 34 +}; + +/** + * Returns 1 if a given precedence level has right-to-left + * associativity, else -1. + * + * @param precedence the operator precedence + */ +static int right_to_left(unsigned precedence) { + return (precedence == PREC_ASSIGN || precedence == PREC_COND || + precedence == PREC_UNARY) ? 1 : -1; +} + +/** + * Return the precedence of an expression given by its kind. + * + * @param kind the expression kind + */ +static unsigned get_expression_precedence(expression_kind_t kind) +{ + static const unsigned prec[] = { + [EXPR_UNKNOWN] = PREC_PRIM, + [EXPR_INVALID] = PREC_PRIM, + [EXPR_REFERENCE] = PREC_PRIM, + [EXPR_CHARACTER_CONSTANT] = PREC_PRIM, + [EXPR_WIDE_CHARACTER_CONSTANT] = PREC_PRIM, + [EXPR_CONST] = PREC_PRIM, + [EXPR_STRING_LITERAL] = PREC_PRIM, + [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM, + [EXPR_COMPOUND_LITERAL] = PREC_UNARY, + [EXPR_CALL] = PREC_PRIM, + [EXPR_CONDITIONAL] = PREC_COND, + [EXPR_SELECT] = PREC_ACCESS, + [EXPR_ARRAY_ACCESS] = PREC_ACCESS, + [EXPR_SIZEOF] = PREC_UNARY, + [EXPR_CLASSIFY_TYPE] = PREC_UNARY, + [EXPR_ALIGNOF] = PREC_UNARY, + + [EXPR_FUNCTION] = PREC_PRIM, + [EXPR_PRETTY_FUNCTION] = PREC_PRIM, + [EXPR_BUILTIN_SYMBOL] = PREC_PRIM, + [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM, + [EXPR_BUILTIN_PREFETCH] = PREC_PRIM, + [EXPR_OFFSETOF] = PREC_PRIM, + [EXPR_VA_START] = PREC_PRIM, + [EXPR_VA_ARG] = PREC_PRIM, + [EXPR_STATEMENT] = PREC_ACCESS, + + [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_UNARY, + [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_UNARY, + [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY, + [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY, + [EXPR_UNARY_CAST] = PREC_UNARY, + [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY, + [EXPR_UNARY_ASSUME] = PREC_PRIM, + [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS, + + [EXPR_BINARY_ADD] = PREC_PLUS, + [EXPR_BINARY_SUB] = PREC_PLUS, + [EXPR_BINARY_MUL] = PREC_MUL, + [EXPR_BINARY_DIV] = PREC_MUL, + [EXPR_BINARY_MOD] = PREC_MUL, + [EXPR_BINARY_EQUAL] = PREC_EQ, + [EXPR_BINARY_NOTEQUAL] = PREC_EQ, + [EXPR_BINARY_LESS] = PREC_CMP, + [EXPR_BINARY_LESSEQUAL] = PREC_CMP, + [EXPR_BINARY_GREATER] = PREC_CMP, + [EXPR_BINARY_GREATEREQUAL] = PREC_CMP, + [EXPR_BINARY_BITWISE_AND] = PREC_BIT_AND, + [EXPR_BINARY_BITWISE_OR] = PREC_BIT_OR, + [EXPR_BINARY_BITWISE_XOR] = PREC_BIT_XOR, + [EXPR_BINARY_LOGICAL_AND] = PREC_LOG_AND, + [EXPR_BINARY_LOGICAL_OR] = PREC_LOG_OR, + [EXPR_BINARY_SHIFTLEFT] = PREC_SHF, + [EXPR_BINARY_SHIFTRIGHT] = PREC_SHF, + [EXPR_BINARY_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGN, + [EXPR_BINARY_COMMA] = PREC_COMMA, + + [EXPR_BINARY_BUILTIN_EXPECT] = PREC_PRIM, + [EXPR_BINARY_ISGREATER] = PREC_PRIM, + [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIM, + [EXPR_BINARY_ISLESS] = PREC_PRIM, + [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIM, + [EXPR_BINARY_ISLESSGREATER] = PREC_PRIM, + [EXPR_BINARY_ISUNORDERED] = PREC_PRIM + }; + assert((unsigned)kind < (sizeof(prec)/sizeof(prec[0]))); + unsigned res = prec[kind]; + + assert(res != PREC_BOTTOM); + return res; +} + +/** + * Print a constant expression. + * + * @param cnst the constant expression + */ +static void print_const(const const_expression_t *cnst) +{ + if(cnst->base.type == NULL) + return; + + const type_t *const type = skip_typeref(cnst->base.type); + + if (is_type_integer(type)) { + fprintf(out, "%lld", cnst->v.int_value); + } else if (is_type_float(type)) { + fprintf(out, "%Lf", cnst->v.float_value); + } else { + panic("unknown constant"); + } +} + +/** + * Print a quoted string constant. + * + * @param string the string constant + * @param border the border char + */ +static void print_quoted_string(const string_t *const string, char border) { - fprintf(out, "%d", cnst->value); + fputc(border, out); + const char *end = string->begin + string->size - 1; + for (const char *c = string->begin; c != end; ++c) { + if (*c == border) { + fputc('\\', out); + } + switch(*c) { + 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; + default: + if(!isprint(*c)) { + fprintf(out, "\\%03o", *c); + break; + } + fputc(*c, out); + break; + } + } + fputc(border, out); } -static -void print_string_literal(const string_literal_t *string_literal) +/** + * Prints a wide string literal expression. + * + * @param wstr the wide string literal expression + */ +static void print_quoted_wide_string(const wide_string_t *const wstr, + char border) { - /* TODO escape " and non-printable chars */ - fprintf(out, "\"%s\"", string_literal->value); + fputc('L', out); + fputc(border, out); + for (const wchar_rep_t *c = wstr->begin, *end = wstr->begin + wstr->size-1; + c != end; ++c) { + switch (*c) { + case L'\"': fputs("\\\"", out); break; + case L'\\': fputs("\\\\", out); break; + case L'\a': fputs("\\a", out); break; + case L'\b': fputs("\\b", out); break; + case L'\f': fputs("\\f", out); break; + case L'\n': fputs("\\n", out); break; + case L'\r': fputs("\\r", out); break; + case L'\t': fputs("\\t", out); break; + case L'\v': fputs("\\v", out); break; + case L'\?': fputs("\\?", out); break; + default: { + const unsigned tc = *c; + if (tc < 0x80U) { + if (!isprint(*c)) { + fprintf(out, "\\%03o", (char)*c); + } else { + fputc(*c, out); + } + } else if (tc < 0x800) { + fputc(0xC0 | (tc >> 6), out); + fputc(0x80 | (tc & 0x3F), out); + } else if (tc < 0x10000) { + fputc(0xE0 | ( tc >> 12), out); + fputc(0x80 | ((tc >> 6) & 0x3F), out); + fputc(0x80 | ( tc & 0x3F), out); + } else { + fputc(0xF0 | ( tc >> 18), out); + fputc(0x80 | ((tc >> 12) & 0x3F), out); + fputc(0x80 | ((tc >> 6) & 0x3F), out); + fputc(0x80 | ( tc & 0x3F), out); + } + } + } + } + fputc(border, out); } -static -void print_call_expression(const call_expression_t *call) +/** + * Print a constant character expression. + * + * @param cnst the constant character expression + */ +static void print_character_constant(const const_expression_t *cnst) { - print_expression(call->method); + print_quoted_string(&cnst->v.character, '\''); +} + +static void print_wide_character_constant(const const_expression_t *cnst) +{ + print_quoted_wide_string(&cnst->v.wide_character, '\''); +} + +/** + * Prints a string literal expression. + * + * @param string_literal the string literal expression + */ +static void print_string_literal( + const string_literal_expression_t *string_literal) +{ + print_quoted_string(&string_literal->value, '"'); +} + +static void print_wide_string_literal( + const wide_string_literal_expression_t *const wstr) +{ + print_quoted_wide_string(&wstr->value, '"'); +} + +static void print_compound_literal( + const compound_literal_expression_t *expression) +{ + fputc('(', out); + print_type(expression->type); + fputs(") ", out); + print_initializer(expression->initializer); +} + +/** + * Prints a call expression. + * + * @param call the call expression + */ +static void print_call_expression(const call_expression_t *call) +{ + unsigned prec = get_expression_precedence(call->base.kind); + print_expression_prec(call->function, prec); fprintf(out, "("); call_argument_t *argument = call->arguments; int first = 1; @@ -48,287 +352,1309 @@ void print_call_expression(const call_expression_t *call) } else { first = 0; } - print_expression(argument->expression); + print_expression_prec(argument->expression, PREC_COMMA + 1); argument = argument->next; } fprintf(out, ")"); } -static -void print_binary_expression(const binary_expression_t *binexpr) +/** + * 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: - fprintf(out, "INVOP"); - break; - case BINEXPR_ASSIGN: - fprintf(out, "<-"); - break; - case BINEXPR_ADD: - fprintf(out, "+"); - break; - case BINEXPR_SUB: - fprintf(out, "-"); - break; - case BINEXPR_NOTEQUAL: - fprintf(out, "/="); - break; - case BINEXPR_EQUAL: - fprintf(out, "="); - break; - case BINEXPR_LESS: - fprintf(out, "<"); - break; - case BINEXPR_LESSEQUAL: - fprintf(out, "<="); - break; - case BINEXPR_GREATER: - fprintf(out, ">"); - break; - case BINEXPR_GREATEREQUAL: - fprintf(out, ">="); + unsigned prec = get_expression_precedence(binexpr->base.kind); + int r2l = right_to_left(prec); + + if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) { + fputs("__builtin_expect(", out); + print_expression_prec(binexpr->left, prec); + fputs(", ", out); + print_expression_prec(binexpr->right, prec); + fputc(')', out); + return; + } + + print_expression_prec(binexpr->left, prec + r2l); + if (binexpr->base.kind != EXPR_BINARY_COMMA) { + fputc(' ', out); + } + switch (binexpr->base.kind) { + case EXPR_BINARY_COMMA: fputs(",", out); break; + case EXPR_BINARY_ASSIGN: fputs("=", out); break; + case EXPR_BINARY_ADD: fputs("+", out); break; + case EXPR_BINARY_SUB: fputs("-", out); break; + case EXPR_BINARY_MUL: fputs("*", out); break; + case EXPR_BINARY_MOD: fputs("%", out); break; + case EXPR_BINARY_DIV: fputs("/", out); break; + case EXPR_BINARY_BITWISE_OR: fputs("|", out); break; + case EXPR_BINARY_BITWISE_AND: fputs("&", out); break; + case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break; + case EXPR_BINARY_LOGICAL_OR: fputs("||", out); break; + case EXPR_BINARY_LOGICAL_AND: fputs("&&", out); break; + case EXPR_BINARY_NOTEQUAL: fputs("!=", out); break; + case EXPR_BINARY_EQUAL: fputs("==", out); break; + case EXPR_BINARY_LESS: fputs("<", out); break; + case EXPR_BINARY_LESSEQUAL: fputs("<=", out); break; + case EXPR_BINARY_GREATER: fputs(">", out); break; + case EXPR_BINARY_GREATEREQUAL: fputs(">=", out); break; + case EXPR_BINARY_SHIFTLEFT: fputs("<<", out); break; + case EXPR_BINARY_SHIFTRIGHT: fputs(">>", out); break; + + case EXPR_BINARY_ADD_ASSIGN: fputs("+=", out); break; + case EXPR_BINARY_SUB_ASSIGN: fputs("-=", out); break; + case EXPR_BINARY_MUL_ASSIGN: fputs("*=", out); break; + case EXPR_BINARY_MOD_ASSIGN: fputs("%=", out); break; + case EXPR_BINARY_DIV_ASSIGN: fputs("/=", out); break; + case EXPR_BINARY_BITWISE_OR_ASSIGN: fputs("|=", out); break; + case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out); break; + case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out); break; + case EXPR_BINARY_SHIFTLEFT_ASSIGN: fputs("<<=", out); break; + case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break; + default: panic("invalid binexpression found"); + } + fputc(' ', out); + print_expression_prec(binexpr->right, prec - r2l); +} + +/** + * Prints an unary expression. + * + * @param unexpr the unary expression + */ +static void print_unary_expression(const unary_expression_t *unexpr) +{ + unsigned prec = get_expression_precedence(unexpr->base.kind); + switch(unexpr->base.kind) { + case EXPR_UNARY_NEGATE: fputs("-", out); break; + case EXPR_UNARY_PLUS: fputs("+", out); break; + case EXPR_UNARY_NOT: fputs("!", out); break; + case EXPR_UNARY_BITWISE_NEGATE: fputs("~", out); break; + case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break; + case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break; + case EXPR_UNARY_DEREFERENCE: fputs("*", out); break; + case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break; + + case EXPR_UNARY_BITFIELD_EXTRACT: + print_expression_prec(unexpr->value, prec); + return; + + case EXPR_UNARY_POSTFIX_INCREMENT: + print_expression_prec(unexpr->value, prec); + fputs("++", out); + return; + case EXPR_UNARY_POSTFIX_DECREMENT: + print_expression_prec(unexpr->value, prec); + fputs("--", out); + return; + case EXPR_UNARY_CAST_IMPLICIT: + if(!print_implicit_casts) { + print_expression_prec(unexpr->value, prec); + return; + } + /* fallthrough */ + case EXPR_UNARY_CAST: + fputc('(', out); + print_type(unexpr->base.type); + fputc(')', out); break; + case EXPR_UNARY_ASSUME: + fputs("__assume(", out); + print_expression_prec(unexpr->value, PREC_COMMA + 1); + fputc(')', out); + return; default: - /* TODO: add missing ops */ - fprintf(out, "op%d", binexpr->type); - break; + panic("invalid unary expression found"); } - fprintf(out, " "); - print_expression(binexpr->right); - fprintf(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); } -void print_expression(const expression_t *expression) +/** + * Prints an array expression. + * + * @param expression the array expression + */ +static void print_array_expression(const array_access_expression_t *expression) +{ + unsigned prec = get_expression_precedence(expression->base.kind); + if(!expression->flipped) { + print_expression_prec(expression->array_ref, prec); + fputc('[', out); + print_expression_prec(expression->index, prec); + fputc(']', out); + } else { + print_expression_prec(expression->index, prec); + fputc('[', out); + print_expression_prec(expression->array_ref, prec); + fputc(']', out); + } +} + +/** + * Prints a typeproperty expression (sizeof or __alignof__). + * + * @param expression the type property expression + */ +static void print_typeprop_expression(const typeprop_expression_t *expression) +{ + if (expression->base.kind == EXPR_SIZEOF) { + fputs("sizeof", out); + } else { + assert(expression->base.kind == EXPR_ALIGNOF); + fputs("__alignof__", out); + } + if(expression->tp_expression != NULL) { + /* always print the '()' here, sizeof x is right but unusual */ + fputc('(', out); + print_expression_prec(expression->tp_expression, PREC_ACCESS); + fputc(')', out); + } else { + fputc('(', out); + print_type(expression->type); + fputc(')', out); + } +} + +/** + * Prints an builtin symbol. + * + * @param expression the builtin symbol expression + */ +static void print_builtin_symbol(const builtin_symbol_expression_t *expression) +{ + fputs(expression->symbol->string, out); +} + +/** + * Prints a builtin constant expression. + * + * @param expression the builtin constant expression + */ +static void print_builtin_constant(const builtin_constant_expression_t *expression) +{ + fputs("__builtin_constant_p(", out); + print_expression_prec(expression->value, PREC_COMMA + 1); + fputc(')', out); +} + +/** + * Prints a builtin prefetch expression. + * + * @param expression the builtin prefetch expression + */ +static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression) +{ + fputs("__builtin_prefetch(", out); + print_expression_prec(expression->adr, PREC_COMMA + 1); + if (expression->rw) { + fputc(',', out); + print_expression_prec(expression->rw, PREC_COMMA + 1); + } + if (expression->locality) { + fputc(',', out); + print_expression_prec(expression->locality, PREC_COMMA + 1); + } + fputc(')', out); +} + +/** + * Prints a conditional expression. + * + * @param expression the conditional expression + */ +static void print_conditional(const conditional_expression_t *expression) +{ + unsigned prec = get_expression_precedence(expression->base.kind); + fputs("(", out); + print_expression_prec(expression->condition, prec); + fputs(" ? ", out); + print_expression_prec(expression->true_expression, prec); + fputs(" : ", out); + print_expression_prec(expression->false_expression, prec); + fputs(")", out); +} + +/** + * Prints a va_start expression. + * + * @param expression the va_start expression + */ +static void print_va_start(const va_start_expression_t *const expression) +{ + fputs("__builtin_va_start(", out); + print_expression_prec(expression->ap, PREC_COMMA + 1); + fputs(", ", out); + fputs(expression->parameter->symbol->string, out); + fputs(")", out); +} + +/** + * 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_prec(expression->ap, PREC_COMMA + 1); + fputs(", ", out); + print_type(expression->base.type); + fputs(")", out); +} + +/** + * Prints a select expression (. or ->). + * + * @param expression the select expression + */ +static void print_select(const select_expression_t *expression) +{ + unsigned prec = get_expression_precedence(expression->base.kind); + print_expression_prec(expression->compound, prec); + if(is_type_pointer(expression->compound->base.type)) { + fputs("->", out); + } else { + fputc('.', out); + } + fputs(expression->symbol->string, out); +} + +/** + * Prints a type classify expression. + * + * @param expr the type classify expression + */ +static void print_classify_type_expression( + const classify_type_expression_t *const expr) { - switch(expression->type) { + fputs("__builtin_classify_type(", out); + print_expression_prec(expr->type_expression, PREC_COMMA + 1); + fputc(')', out); +} + +/** + * Prints a designator. + * + * @param designator the designator + */ +static void print_designator(const designator_t *designator) +{ + for ( ; designator != NULL; designator = designator->next) { + if (designator->symbol == NULL) { + fputc('[', out); + print_expression_prec(designator->array_index, PREC_ACCESS); + fputc(']', out); + } else { + fputc('.', out); + fputs(designator->symbol->string, out); + } + } +} + +/** + * Prints an offsetof expression. + * + * @param expression the offset expression + */ +static void print_offsetof_expression(const offsetof_expression_t *expression) +{ + fputs("__builtin_offsetof", out); + fputc('(', out); + print_type(expression->type); + fputc(',', out); + print_designator(expression->designator); + fputc(')', out); +} + +/** + * Prints a statement expression. + * + * @param expression the statement expression + */ +static void print_statement_expression(const statement_expression_t *expression) +{ + fputc('(', out); + print_statement(expression->statement); + fputc(')', out); +} + +/** + * 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) +{ + unsigned prec = get_expression_precedence(expression->base.kind); + if (print_parenthesis && top_prec != PREC_BOTTOM) + top_prec = PREC_TOP; + if (top_prec > prec) + fputc('(', out); + switch(expression->kind) { + case EXPR_UNKNOWN: case EXPR_INVALID: - fprintf(out, "*invalid expression*"); + fprintf(out, "$invalid expression$"); + break; + case EXPR_CHARACTER_CONSTANT: + print_character_constant(&expression->conste); + break; + case EXPR_WIDE_CHARACTER_CONSTANT: + print_wide_character_constant(&expression->conste); break; case EXPR_CONST: - print_const((const const_t*) expression); + print_const(&expression->conste); break; + case EXPR_FUNCTION: + case EXPR_PRETTY_FUNCTION: case EXPR_STRING_LITERAL: - print_string_literal((const string_literal_t*) expression); + print_string_literal(&expression->string); + break; + case EXPR_WIDE_STRING_LITERAL: + print_wide_string_literal(&expression->wide_string); + break; + case EXPR_COMPOUND_LITERAL: + print_compound_literal(&expression->compound_literal); break; case EXPR_CALL: - print_call_expression((const call_expression_t*) expression); + print_call_expression(&expression->call); break; - case EXPR_BINARY: - print_binary_expression((const binary_expression_t*) expression); + EXPR_BINARY_CASES + print_binary_expression(&expression->binary); break; case EXPR_REFERENCE: - print_reference_expression((const reference_expression_t*) expression); + print_reference_expression(&expression->reference); break; - case EXPR_UNARY: - case EXPR_SELECT: case EXPR_ARRAY_ACCESS: + print_array_expression(&expression->array_access); + break; + EXPR_UNARY_CASES + print_unary_expression(&expression->unary); + break; case EXPR_SIZEOF: + case EXPR_ALIGNOF: + print_typeprop_expression(&expression->typeprop); + break; + case EXPR_BUILTIN_SYMBOL: + print_builtin_symbol(&expression->builtin_symbol); + break; + case EXPR_BUILTIN_CONSTANT_P: + print_builtin_constant(&expression->builtin_constant); + break; + case EXPR_BUILTIN_PREFETCH: + print_builtin_prefetch(&expression->builtin_prefetch); + 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_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: + print_statement_expression(&expression->statement); + break; + + default: /* TODO */ - fprintf(out, "some expression of type %d", expression->type); + fprintf(out, "some expression of type %d", (int) expression->kind); break; } + if (top_prec > prec) + fputc(')', out); } -static -void print_compound_statement(const compound_statement_t *block) +/** + * Print an compound statement. + * + * @param block the compound statement + */ +static void print_compound_statement(const compound_statement_t *block) { fputs("{\n", out); - indent++; + ++indent; statement_t *statement = block->statements; while(statement != NULL) { + if (statement->base.kind == STATEMENT_CASE_LABEL) + --indent; print_indent(); print_statement(statement); - statement = statement->next; + statement = statement->base.next; } - indent--; + --indent; print_indent(); fputs("}\n", out); } -static -void print_return_statement(const return_statement_t *statement) +/** + * 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); + if(statement->value != NULL) + print_expression(statement->value); fputs(";\n", out); } -static -void print_expression_statement(const expression_statement_t *statement) +/** + * 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); } -static -void print_goto_statement(const goto_statement_t *statement) +/** + * Print a goto statement. + * + * @param statement the goto statement + */ +static void print_goto_statement(const goto_statement_t *statement) { fprintf(out, "goto "); - if(statement->label != NULL) { - fprintf(out, "%s", statement->label->symbol->string); - } else { - fprintf(out, "?%s", statement->label_symbol->string); - } + fputs(statement->label->symbol->string, out); + fprintf(stderr, "(%p)", (void*) statement->label); fputs(";\n", out); } -static -void print_label_statement(const label_statement_t *statement) +/** + * Print a label statement. + * + * @param statement the label statement + */ +static void print_label_statement(const label_statement_t *statement) { - fprintf(out, "%s:\n", statement->symbol->string); + fprintf(stderr, "(%p)", (void*) statement->label); + fprintf(out, "%s:\n", statement->label->symbol->string); + print_statement(statement->statement); } -static -void print_if_statement(const if_statement_t *statement) +/** + * Print an if statement. + * + * @param statement the if statement + */ +static void print_if_statement(const if_statement_t *statement) { - fprintf(out, "if("); + fputs("if (", out); print_expression(statement->condition); - fprintf(out, ") "); - if(statement->true_statement != NULL) { - print_statement(statement->true_statement); - } + fputs(") ", out); + print_statement(statement->true_statement); if(statement->false_statement != NULL) { print_indent(); - fprintf(out, "else "); + fputs("else ", out); print_statement(statement->false_statement); } } -static -void print_declaration_statement(const declaration_statement_t *statement) +/** + * Print a switch statement. + * + * @param statement the switch statement + */ +static void print_switch_statement(const switch_statement_t *statement) { - (void) statement; - fprintf(out, "*declaration statement*"); + fputs("switch (", out); + print_expression(statement->expression); + fputs(") ", out); + print_statement(statement->body); } +/** + * 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); + } else { + fputs("case ", out); + print_expression(statement->expression); + if (statement->end_range != NULL) { + fputs(" ... ", out); + print_expression(statement->end_range); + } + fputs(":\n", out); + } + ++indent; + if(statement->statement != NULL) { + if (statement->statement->base.kind == STATEMENT_CASE_LABEL) { + --indent; + } + print_indent(); + print_statement(statement->statement); + } +} + +/** + * 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(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) + continue; + + if(!first) { + print_indent(); + } else { + first = 0; + } + print_declaration(declaration); + fputc('\n', out); + } +} + +/** + * Print a while statement. + * + * @param statement the statement + */ +static void print_while_statement(const while_statement_t *statement) +{ + fputs("while (", out); + print_expression(statement->condition); + fputs(") ", out); + print_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_expression(statement->condition); + fputs(");\n", out); +} + +/** + * Print a for statement. + * + * @param statement the statement + */ +static void print_for_statement(const for_statement_t *statement) +{ + fputs("for (", out); + if(statement->scope.declarations != NULL) { + assert(statement->initialisation == NULL); + print_declaration(statement->scope.declarations); + if(statement->scope.declarations->next != NULL) { + panic("multiple declarations in for statement not supported yet"); + } + fputc(' ', out); + } else { + if(statement->initialisation) { + print_expression(statement->initialisation); + } + fputs("; ", out); + } + if(statement->condition != NULL) { + print_expression(statement->condition); + } + fputs("; ", out); + if(statement->step != NULL) { + print_expression(statement->step); + } + fputs(")", out); + print_statement(statement->body); +} + +/** + * Print assembler constraints. + * + * @param constraints the constraints + */ +static void print_asm_constraints(asm_constraint_t *constraints) +{ + asm_constraint_t *constraint = constraints; + for( ; constraint != NULL; constraint = constraint->next) { + if(constraint != constraints) + fputs(", ", out); + + if(constraint->symbol) { + fprintf(out, "[%s] ", constraint->symbol->string); + } + print_quoted_string(&constraint->constraints, '"'); + fputs(" (", out); + print_expression(constraint->expression); + fputs(")", out); + } +} + +/** + * 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); + + print_quoted_string(&clobber->clobber, '"'); + } +} + +/** + * 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); + } + fputs("(", out); + print_quoted_string(&statement->asm_text, '"'); + if(statement->inputs == NULL && statement->outputs == NULL + && statement->clobbers == NULL) + goto end_of_print_asm_statement; + + fputs(" : ", out); + print_asm_constraints(statement->inputs); + if(statement->outputs == NULL && statement->clobbers == NULL) + goto end_of_print_asm_statement; + + fputs(" : ", out); + print_asm_constraints(statement->outputs); + if(statement->clobbers == NULL) + goto end_of_print_asm_statement; + + fputs(" : ", out); + print_asm_clobbers(statement->clobbers); + +end_of_print_asm_statement: + fputs(");\n", out); +} + +/** + * Print a statement. + * + * @param statement the statement + */ void print_statement(const statement_t *statement) { - switch(statement->type) { + switch(statement->kind) { + case STATEMENT_EMPTY: + fputs(";\n", out); + break; case STATEMENT_COMPOUND: - print_compound_statement((const compound_statement_t*) statement); + print_compound_statement(&statement->compound); break; case STATEMENT_RETURN: - print_return_statement((const return_statement_t*) statement); + print_return_statement(&statement->returns); break; case STATEMENT_EXPRESSION: - print_expression_statement((const expression_statement_t*) statement); + print_expression_statement(&statement->expression); break; case STATEMENT_LABEL: - print_label_statement((const label_statement_t*) statement); + print_label_statement(&statement->label); break; case STATEMENT_GOTO: - print_goto_statement((const goto_statement_t*) statement); + print_goto_statement(&statement->gotos); + break; + case STATEMENT_CONTINUE: + fputs("continue;\n", out); + break; + case STATEMENT_BREAK: + fputs("break;\n", out); break; case STATEMENT_IF: - print_if_statement((const if_statement_t*) statement); + print_if_statement(&statement->ifs); + break; + case STATEMENT_SWITCH: + print_switch_statement(&statement->switchs); + break; + case STATEMENT_CASE_LABEL: + print_case_label(&statement->case_label); break; case STATEMENT_DECLARATION: - print_declaration_statement((const declaration_statement_t*) statement); + print_declaration_statement(&statement->declaration); + break; + case STATEMENT_WHILE: + print_while_statement(&statement->whiles); + break; + case STATEMENT_DO_WHILE: + print_do_while_statement(&statement->do_while); + break; + case STATEMENT_FOR: + print_for_statement(&statement->fors); + break; + case STATEMENT_ASM: + print_asm_statement(&statement->asms); break; case STATEMENT_INVALID: - default: - fprintf(out, "*invalid statement*"); + fprintf(out, "$invalid statement$"); break; + } +} +/** + * Print a storage class. + * + * @param storage_class the storage class + */ +static void print_storage_class(storage_class_tag_t storage_class) +{ + switch(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; } } -#if 0 -static -void print_method_parameters(const method_parameter_t *parameters, - const method_type_t *method_type) +/** + * Print an initializer. + * + * @param initializer the initializer + */ +void print_initializer(const initializer_t *initializer) { - fprintf(out, "("); + if(initializer == NULL) { + fputs("{}", out); + return; + } - int first = 1; - const method_parameter_t *parameter = parameters; - const method_parameter_type_t *parameter_type - = method_type->parameter_types; - while(parameter != NULL && parameter_type != NULL) { - if(!first) { - fprintf(out, ", "); - } else { - first = 0; + switch(initializer->kind) { + case INITIALIZER_VALUE: { + const initializer_value_t *value = &initializer->value; + print_expression(value->value); + return; + } + case INITIALIZER_LIST: { + assert(initializer->kind == INITIALIZER_LIST); + fputs("{ ", out); + 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) + fputs(", ", out); + } } + fputs(" }", out); + return; + } + case INITIALIZER_STRING: + print_quoted_string(&initializer->string.string, '"'); + return; + case INITIALIZER_WIDE_STRING: + print_quoted_wide_string(&initializer->wide_string.string, '"'); + return; + case INITIALIZER_DESIGNATOR: + print_designator(initializer->designator.designator); + fputs(" = ", out); + return; + } - print_type(parameter_type->type); - fprintf(out, " %s", parameter->symbol->string); + panic("invalid initializer kind found"); +} - parameter = parameter->next; - parameter_type = parameter_type->next; - } - assert(parameter == NULL && parameter_type == NULL); +/** + * Print microsoft extended declaration modifiers. + */ +static void print_ms_modifiers(const declaration_t *declaration) { + if((c_mode & _MS) == 0) + return; - fprintf(out, ")"); + decl_modifiers_t modifiers = declaration->modifiers; + + /* DM_FORCEINLINE handled outside. */ + if((modifiers & ~DM_FORCEINLINE) != 0 || + declaration->alignment != 0 || declaration->deprecated != 0 || + declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) { + char *next = "("; + + fputs("__declspec", out); + if(modifiers & DM_DLLIMPORT) { + fputs(next, out); next = ", "; fputs("dllimport", out); + } + if(modifiers & DM_DLLEXPORT) { + fputs(next, out); next = ", "; fputs("dllexport", out); + } + if(modifiers & DM_THREAD) { + fputs(next, out); next = ", "; fputs("thread", out); + } + if(modifiers & DM_NAKED) { + fputs(next, out); next = ", "; fputs("naked", out); + } + if(modifiers & DM_THREAD) { + fputs(next, out); next = ", "; fputs("thread", out); + } + if(modifiers & DM_SELECTANY) { + fputs(next, out); next = ", "; fputs("selectany", out); + } + if(modifiers & DM_NOTHROW) { + fputs(next, out); next = ", "; fputs("nothrow", out); + } + if(modifiers & DM_NORETURN) { + fputs(next, out); next = ", "; fputs("noreturn", out); + } + if(modifiers & DM_NOINLINE) { + fputs(next, out); next = ", "; fputs("noinline", out); + } + if(declaration->deprecated != 0) { + fputs(next, out); next = ", "; fputs("deprecated", out); + if(declaration->deprecated_string != NULL) + fprintf(out, "(\"%s\")", declaration->deprecated_string); + } + if(declaration->alignment != 0) { + fputs(next, out); next = ", "; fprintf(out, "align(%u)", declaration->alignment); + } + if(modifiers & DM_RESTRICT) { + fputs(next, out); next = ", "; fputs("restrict", out); + } + if(modifiers & DM_NOALIAS) { + fputs(next, out); next = ", "; fputs("noalias", out); + } + if(declaration->get_property_sym != NULL || declaration->put_property_sym != NULL) { + char *comma = ""; + fputs(next, out); next = ", "; fprintf(out, "property("); + if(declaration->get_property_sym != NULL) { + fprintf(out, "get=%s", declaration->get_property_sym->string); + comma = ", "; + } + if(declaration->put_property_sym != NULL) + fprintf(out, "%sput=%s", comma, declaration->put_property_sym->string); + fputc(')', out); + } + fputs(") ", out); + } } -#endif -static -void print_storage_class(storage_class_t storage_class) +/** + * Print a declaration in the NORMAL namespace. + * + * @param declaration the declaration + */ +static void print_normal_declaration(const declaration_t *declaration) { - switch(storage_class) { - 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; + print_storage_class((storage_class_tag_t) declaration->declared_storage_class); + if(declaration->is_inline) { + if(declaration->modifiers & DM_FORCEINLINE) + fputs("__forceinline ", out); + else { + if(declaration->modifiers & DM_MICROSOFT_INLINE) + fputs("__inline ", out); + else + fputs("inline ", out); + } + } + print_ms_modifiers(declaration); + print_type_ext(declaration->type, declaration->symbol, + &declaration->scope); + + if(declaration->type->kind == TYPE_FUNCTION) { + if(declaration->init.statement != NULL) { + fputs("\n", out); + print_statement(declaration->init.statement); + return; + } + } else if(declaration->init.initializer != NULL) { + fputs(" = ", out); + print_initializer(declaration->init.initializer); } + fputc(';', out); } -static +/** + * 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_declaration(const declaration_t *declaration) { - print_storage_class(declaration->storage_class); - print_type(declaration->type, declaration->symbol); - if(declaration->statement != NULL) { - fputs("\n", out); - print_statement(declaration->statement); - } else { - fprintf(out, ";\n"); + if(declaration->namespc != NAMESPACE_NORMAL && + declaration->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; } } +/** + * Print the AST of a translation unit. + * + * @param unit the translation unit + */ void print_ast(const translation_unit_t *unit) { - declaration_t *declaration = unit->context.declarations; - while(declaration != NULL) { + inc_type_visited(); + + declaration_t *declaration = unit->scope.declarations; + for( ; declaration != NULL; declaration = declaration->next) { + if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) + continue; + if(declaration->namespc != NAMESPACE_NORMAL && + declaration->symbol == NULL) + continue; + + print_indent(); print_declaration(declaration); + fputc('\n', out); + } +} + +bool is_constant_initializer(const initializer_t *initializer) +{ + switch(initializer->kind) { + case INITIALIZER_STRING: + case INITIALIZER_WIDE_STRING: + case INITIALIZER_DESIGNATOR: + return true; + + case INITIALIZER_VALUE: + return is_constant_expression(initializer->value.value); + + case INITIALIZER_LIST: + for(size_t i = 0; i < initializer->list.len; ++i) { + initializer_t *sub_initializer = initializer->list.initializers[i]; + if(!is_constant_initializer(sub_initializer)) + return false; + } + return true; + } + panic("invalid initializer kind found"); +} + +static bool is_object_with_constant_address(const expression_t *expression) +{ + switch(expression->kind) { + case EXPR_UNARY_DEREFERENCE: + return is_address_constant(expression->unary.value); + + case EXPR_SELECT: { + if(is_type_pointer(expression->select.compound->base.type)) { + /* it's a -> */ + return is_address_constant(expression->select.compound); + } else { + return is_object_with_constant_address(expression->select.compound); + } + } + + case EXPR_ARRAY_ACCESS: + return is_constant_expression(expression->array_access.index) + && is_address_constant(expression->array_access.array_ref); + + case EXPR_REFERENCE: { + declaration_t *declaration = expression->reference.declaration; + switch((storage_class_tag_t) declaration->storage_class) { + case STORAGE_CLASS_NONE: + case STORAGE_CLASS_EXTERN: + case STORAGE_CLASS_STATIC: + return true; + default: + return false; + } + } + + default: + return false; + } +} + +bool is_address_constant(const expression_t *expression) +{ + switch(expression->kind) { + case EXPR_UNARY_TAKE_ADDRESS: + return is_object_with_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_address_constant(expression->unary.value); + } + } + + case EXPR_UNARY_CAST: + return is_type_pointer(skip_typeref(expression->base.type)) + && (is_constant_expression(expression->unary.value) + || is_address_constant(expression->unary.value)); + + case EXPR_BINARY_ADD: + case EXPR_BINARY_SUB: { + expression_t *left = expression->binary.left; + expression_t *right = expression->binary.right; - declaration = declaration->next; + if(is_type_pointer(skip_typeref(left->base.type))) { + return is_address_constant(left) && is_constant_expression(right); + } else if(is_type_pointer(skip_typeref(right->base.type))) { + return is_constant_expression(left) && is_address_constant(right); + } + + return false; + } + + case EXPR_REFERENCE: { + declaration_t *declaration = expression->reference.declaration; + type_t *type = skip_typeref(declaration->type); + if(is_type_function(type)) + return true; + if(is_type_array(type)) { + return is_object_with_constant_address(expression); + } + return false; + } + + default: + return false; + } +} + +bool is_constant_expression(const expression_t *expression) +{ + switch(expression->kind) { + + case EXPR_CONST: + case EXPR_CHARACTER_CONSTANT: + case EXPR_WIDE_CHARACTER_CONSTANT: + case EXPR_STRING_LITERAL: + case EXPR_WIDE_STRING_LITERAL: + case EXPR_SIZEOF: + case EXPR_CLASSIFY_TYPE: + case EXPR_FUNCTION: + case EXPR_FUNCSIG: + case EXPR_FUNCDNAME: + case EXPR_PRETTY_FUNCTION: + case EXPR_OFFSETOF: + case EXPR_ALIGNOF: + case EXPR_BUILTIN_CONSTANT_P: + return true; + + case EXPR_BUILTIN_SYMBOL: + case EXPR_BUILTIN_PREFETCH: + case EXPR_CALL: + case EXPR_SELECT: + case EXPR_VA_START: + case EXPR_VA_ARG: + 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_BITFIELD_EXTRACT: + case EXPR_UNARY_ASSUME: /* has VOID type */ + case EXPR_UNARY_TAKE_ADDRESS: + case EXPR_UNARY_DEREFERENCE: + 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: + return false; + + 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: + case EXPR_UNARY_CAST_IMPLICIT: + return is_type_arithmetic(skip_typeref(expression->base.type)) + && is_constant_expression(expression->unary.value); + + 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_LOGICAL_AND: + case EXPR_BINARY_LOGICAL_OR: + case EXPR_BINARY_SHIFTLEFT: + case EXPR_BINARY_SHIFTRIGHT: + case EXPR_BINARY_BUILTIN_EXPECT: + case EXPR_BINARY_ISGREATER: + case EXPR_BINARY_ISGREATEREQUAL: + case EXPR_BINARY_ISLESS: + case EXPR_BINARY_ISLESSEQUAL: + case EXPR_BINARY_ISLESSGREATER: + case EXPR_BINARY_ISUNORDERED: + return is_constant_expression(expression->binary.left) + && is_constant_expression(expression->binary.right); + + case EXPR_COMPOUND_LITERAL: + return is_constant_initializer(expression->compound_literal.initializer); + + case EXPR_CONDITIONAL: { + expression_t *condition = expression->conditional.condition; + if(!is_constant_expression(condition)) + return false; + + long val = fold_constant(condition); + if(val != 0) + return is_constant_expression(expression->conditional.true_expression); + else + return is_constant_expression(expression->conditional.false_expression); + } + + case EXPR_ARRAY_ACCESS: + return is_constant_expression(expression->array_access.array_ref) + && is_constant_expression(expression->array_access.index); + + case EXPR_REFERENCE: { + declaration_t *declaration = expression->reference.declaration; + if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) + return true; + + return false; + } + + case EXPR_INVALID: + return true; + + case EXPR_UNKNOWN: + break; } + panic("invalid expression found (is constant expression)"); } +/** + * Initialize the AST construction. + */ void init_ast(void) { obstack_init(&ast_obstack); } +/** + * Free the AST. + */ void exit_ast(void) { obstack_free(&ast_obstack, NULL); } +/** + * Set the output stream for the AST printer. + * + * @param stream the output stream + */ void ast_set_output(FILE *stream) { out = stream; type_set_output(stream); } -void* (allocate_ast) (size_t size) +/** + * Allocate an AST object of the given size. + * + * @param size the size of the object to allocate + * + * @return A new allocated object in the AST memeory space. + */ +void *(allocate_ast)(size_t size) { return _allocate_ast(size); }