X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ast.c;h=4bf325829c0182c6c19b9d4b7474155ac79f0bc0;hb=c82bb755ba4e0d51d7edfdab7af98bc47eca6f62;hp=c29b730bf19560b2633d4ef9c3e11ce8633e3db2;hpb=0e0faae013a4302a0cc4f6e465301a82483e0a52;p=cparser diff --git a/ast.c b/ast.c index c29b730..4bf3258 100644 --- a/ast.c +++ b/ast.c @@ -14,9 +14,15 @@ struct obstack ast_obstack; static FILE *out; static int indent; -static int print_implicit_casts = 1; + +/** 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) { @@ -30,24 +36,173 @@ void print_indent(void) fprintf(out, "\t"); } +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_CHAR_CONST] = PREC_PRIM, + [EXPR_CONST] = PREC_PRIM, + [EXPR_STRING_LITERAL] = PREC_PRIM, + [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM, + [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 + }; +#ifndef NDEBUG + if ((unsigned)kind >= (sizeof(prec)/sizeof(prec[0]))) { + panic("wrong expression kind"); + } + unsigned res = prec[kind]; + if (res == PREC_BOTTOM) { + panic("expression kind not defined in get_expression_precedence()"); + } +#endif + return res; +} + +/** + * Print a constant expression. + * + * @param cnst the constant expression + */ static void print_const(const const_expression_t *cnst) { - if(cnst->expression.datatype == NULL) + if(cnst->base.type == NULL) return; - if(is_type_integer(cnst->expression.datatype)) { + 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_floating(cnst->expression.datatype)) { + } else if (is_type_float(type)) { fprintf(out, "%Lf", cnst->v.float_value); + } else { + panic("unknown constant"); } } -static void print_quoted_string(const string_t *const string) +/** + * 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) { - fputc('"', out); - for (const char *c = string->begin, *const end = c + string->size; c != end; ++c) { + fputc(border, out); + const char *end = string->begin + string->size; + for (const char *c = string->begin; c != end; ++c) { + if (*c == border) { + fputc('\\', out); + } switch(*c) { - case '\"': fputs("\\\"", out); break; case '\\': fputs("\\\\", out); break; case '\a': fputs("\\a", out); break; case '\b': fputs("\\b", out); break; @@ -66,15 +221,35 @@ static void print_quoted_string(const string_t *const string) break; } } - fputc('"', out); + fputc(border, out); +} + +/** + * Print a constant character expression. + * + * @param cnst the constant character expression + */ +static void print_char_const(const const_expression_t *cnst) +{ + print_quoted_string(&cnst->v.chars, '\''); } +/** + * 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); + print_quoted_string(&string_literal->value, '"'); } +/** + * Prints a wide string literal expression. + * + * @param wstr the wide string literal expression + */ static void print_wide_string_literal( const wide_string_literal_expression_t *const wstr) { @@ -120,9 +295,15 @@ static void print_wide_string_literal( fputc('"', out); } +/** + * Prints a call expression. + * + * @param call the call expression + */ static void print_call_expression(const call_expression_t *call) { - print_expression(call->function); + 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; @@ -132,28 +313,37 @@ static 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, ")"); } +/** + * Prints a binary expression. + * + * @param binexpr the binary expression + */ static void print_binary_expression(const binary_expression_t *binexpr) { - if(binexpr->expression.kind == EXPR_BINARY_BUILTIN_EXPECT) { + 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(binexpr->left); + print_expression_prec(binexpr->left, prec); fputs(", ", out); - print_expression(binexpr->right); - fputs(")", out); + print_expression_prec(binexpr->right, prec); + fputc(')', out); return; } - fprintf(out, "("); - print_expression(binexpr->left); - fprintf(out, " "); - switch(binexpr->expression.kind) { + 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; @@ -187,14 +377,19 @@ static void print_binary_expression(const binary_expression_t *binexpr) case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break; default: panic("invalid binexpression found"); } - fprintf(out, " "); - print_expression(binexpr->right); - fprintf(out, ")"); + 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) { - switch(unexpr->expression.kind) { + 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; @@ -205,71 +400,87 @@ static void print_unary_expression(const unary_expression_t *unexpr) case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break; case EXPR_UNARY_BITFIELD_EXTRACT: - print_expression(unexpr->value); + print_expression_prec(unexpr->value, prec); return; case EXPR_UNARY_POSTFIX_INCREMENT: - fputs("(", out); - print_expression(unexpr->value); - fputs(")", out); + print_expression_prec(unexpr->value, prec); fputs("++", out); return; case EXPR_UNARY_POSTFIX_DECREMENT: - fputs("(", out); - print_expression(unexpr->value); - fputs(")", out); + print_expression_prec(unexpr->value, prec); fputs("--", out); return; case EXPR_UNARY_CAST_IMPLICIT: if(!print_implicit_casts) { - print_expression(unexpr->value); + print_expression_prec(unexpr->value, prec); return; } /* fallthrough */ case EXPR_UNARY_CAST: - fputs("(", out); - print_type(unexpr->expression.datatype); - fputs(")", out); + fputc('(', out); + print_type(unexpr->base.type); + fputc(')', out); break; case EXPR_UNARY_ASSUME: - fputs("__assume", out); - break; + fputs("__assume(", out); + print_expression_prec(unexpr->value, PREC_COMMA + 1); + fputc(')', out); + return; 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); } +/** + * 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) { - fputs("(", out); - print_expression(expression->array_ref); - fputs(")[", out); - print_expression(expression->index); - fputs("]", out); + print_expression_prec(expression->array_ref, prec); + fputc('[', out); + print_expression_prec(expression->index, prec); + fputc(']', out); } else { - fputs("(", out); - print_expression(expression->index); - fputs(")[", out); - print_expression(expression->array_ref); - fputs("]", out); + print_expression_prec(expression->index, prec); + fputc('[', out); + print_expression_prec(expression->array_ref, prec); + fputc(']', out); } } -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) { + 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(expression->size_expression); + print_expression_prec(expression->tp_expression, PREC_ACCESS); fputc(')', out); } else { fputc('(', out); @@ -278,74 +489,104 @@ static void print_sizeof_expression(const sizeof_expression_t *expression) } } -static void print_alignof_expression(const alignof_expression_t *expression) -{ - fputs("__alignof__(", 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(expression->value); + 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(expression->adr); + print_expression_prec(expression->adr, PREC_COMMA + 1); if (expression->rw) { fputc(',', out); - print_expression(expression->rw); + print_expression_prec(expression->rw, PREC_COMMA + 1); } if (expression->locality) { fputc(',', out); - print_expression(expression->locality); + 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(expression->condition); + print_expression_prec(expression->condition, prec); fputs(" ? ", out); - print_expression(expression->true_expression); + print_expression_prec(expression->true_expression, prec); fputs(" : ", out); - print_expression(expression->false_expression); + 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(expression->ap); + 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(expression->ap); + print_expression_prec(expression->ap, PREC_COMMA + 1); fputs(", ", out); - print_type(expression->expression.datatype); + 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) { - print_expression(expression->compound); - if(expression->compound->base.datatype == NULL || - expression->compound->base.datatype->kind == TYPE_POINTER) { + unsigned prec = get_expression_precedence(expression->base.kind); + print_expression_prec(expression->compound, prec); + if(expression->compound->base.type == NULL || + expression->compound->base.type->kind == TYPE_POINTER) { fputs("->", out); } else { fputc('.', out); @@ -353,21 +594,31 @@ static void print_select(const select_expression_t *expression) 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) { fputs("__builtin_classify_type(", out); - print_expression(expr->type_expression); + 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) { fputs(designator->symbol->string, out); for (designator = designator->next; designator != NULL; designator = designator->next) { if (designator->array_access) { fputc('[', out); - print_expression(designator->array_access); + print_expression_prec(designator->array_access, PREC_ACCESS); fputc(']', out); } else { fputc('.', out); @@ -376,6 +627,11 @@ static void print_designator(const designator_t *designator) } } +/** + * Prints an offsetof expression. + * + * @param expression the offset expression + */ static void print_offsetof_expression(const offsetof_expression_t *expression) { fputs("__builtin_offsetof", out); @@ -386,6 +642,11 @@ static void print_offsetof_expression(const offsetof_expression_t *expression) fputc(')', out); } +/** + * Prints a statement expression. + * + * @param expression the statement expression + */ static void print_statement_expression(const statement_expression_t *expression) { fputc('(', out); @@ -393,13 +654,27 @@ static void print_statement_expression(const statement_expression_t *expression) fputc(')', out); } -void print_expression(const expression_t *expression) +/** + * 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*"); break; + case EXPR_CHAR_CONST: + print_char_const(&expression->conste); + break; case EXPR_CONST: print_const(&expression->conste); break; @@ -427,10 +702,8 @@ void print_expression(const expression_t *expression) print_unary_expression(&expression->unary); break; case EXPR_SIZEOF: - print_sizeof_expression(&expression->sizeofe); - break; case EXPR_ALIGNOF: - print_alignof_expression(&expression->alignofe); + print_typeprop_expression(&expression->typeprop); break; case EXPR_BUILTIN_SYMBOL: print_builtin_symbol(&expression->builtin_symbol); @@ -468,39 +741,63 @@ void print_expression(const expression_t *expression) fprintf(out, "some expression of type %d", (int) expression->kind); break; } + if (top_prec > prec) + fputc(')', out); } +/** + * 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->base.next; } - indent--; + --indent; print_indent(); fputs("}\n", out); } +/** + * 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); } +/** + * 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 a goto statement. + * + * @param statement the goto statement + */ static void print_goto_statement(const goto_statement_t *statement) { fprintf(out, "goto "); @@ -509,15 +806,25 @@ static void print_goto_statement(const goto_statement_t *statement) fputs(";\n", out); } +/** + * 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); + if(statement->statement != NULL) { + print_statement(statement->statement); } } +/** + * Print an if statement. + * + * @param statement the if statement + */ static void print_if_statement(const if_statement_t *statement) { fputs("if(", out); @@ -534,6 +841,11 @@ static void print_if_statement(const if_statement_t *statement) } } +/** + * Print a switch statement. + * + * @param statement the switch statement + */ static void print_switch_statement(const switch_statement_t *statement) { fputs("switch(", out); @@ -542,6 +854,11 @@ static void print_switch_statement(const switch_statement_t *statement) 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) { @@ -549,11 +866,27 @@ static void print_case_label(const case_label_statement_t *statement) } else { fputs("case ", out); print_expression(statement->expression); + if (statement->end_range != NULL) { + fputs(" ... ", out); + print_expression(statement->end_range); + } fputs(":\n", out); } - print_statement(statement->label_statement); + ++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) { @@ -571,6 +904,11 @@ static void print_declaration_statement( } } +/** + * Print a while statement. + * + * @param statement the statement + */ static void print_while_statement(const while_statement_t *statement) { fputs("while(", out); @@ -579,6 +917,11 @@ static void print_while_statement(const while_statement_t *statement) 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); @@ -589,13 +932,18 @@ static void print_do_while_statement(const do_while_statement_t *statement) 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->context.declarations != NULL) { + if(statement->scope.declarations != NULL) { assert(statement->initialisation == NULL); - print_declaration(statement->context.declarations); - if(statement->context.declarations->next != NULL) { + print_declaration(statement->scope.declarations); + if(statement->scope.declarations->next != NULL) { panic("multiple declarations in for statement not supported yet"); } fputc(' ', out); @@ -616,6 +964,11 @@ static void print_for_statement(const for_statement_t *statement) 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; @@ -626,13 +979,18 @@ static void print_asm_constraints(asm_constraint_t *constraints) if(constraint->symbol) { fprintf(out, "[%s] ", constraint->symbol->string); } - print_quoted_string(&constraint->constraints); + 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; @@ -640,10 +998,15 @@ static void print_asm_clobbers(asm_clobber_t *clobbers) if(clobber != clobbers) fputs(", ", out); - print_quoted_string(&clobber->clobber); + 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); @@ -651,7 +1014,7 @@ static void print_asm_statement(const asm_statement_t *statement) fputs("volatile ", out); } fputs("(", out); - print_quoted_string(&statement->asm_text); + print_quoted_string(&statement->asm_text, '"'); if(statement->inputs == NULL && statement->outputs == NULL && statement->clobbers == NULL) goto end_of_print_asm_statement; @@ -673,6 +1036,11 @@ end_of_print_asm_statement: fputs(");\n", out); } +/** + * Print a statement. + * + * @param statement the statement + */ void print_statement(const statement_t *statement) { switch(statement->kind) { @@ -727,6 +1095,11 @@ void print_statement(const statement_t *statement) } } +/** + * Print a storage class. + * + * @param storage_class the storage class + */ static void print_storage_class(unsigned storage_class) { switch((storage_class_tag_t) storage_class) { @@ -744,6 +1117,11 @@ static void print_storage_class(unsigned storage_class) } } +/** + * Print an initializer. + * + * @param initializer the initializer + */ void print_initializer(const initializer_t *initializer) { if(initializer->kind == INITIALIZER_VALUE) { @@ -765,6 +1143,11 @@ void print_initializer(const initializer_t *initializer) fputs("}", out); } +/** + * Print a declaration in the NORMAL namespace. + * + * @param declaration the declaration + */ static void print_normal_declaration(const declaration_t *declaration) { print_storage_class(declaration->storage_class); @@ -775,7 +1158,7 @@ static void print_normal_declaration(const declaration_t *declaration) fputs("inline ", out); } print_type_ext(declaration->type, declaration->symbol, - &declaration->context); + &declaration->scope); if(declaration->type->kind == TYPE_FUNCTION) { if(declaration->init.statement != NULL) { @@ -790,6 +1173,20 @@ static void print_normal_declaration(const declaration_t *declaration) fputc(';', out); } +/** + * 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) { if(declaration->namespc != NAMESPACE_NORMAL && @@ -824,11 +1221,16 @@ void print_declaration(const declaration_t *declaration) } } +/** + * 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; + declaration_t *declaration = unit->scope.declarations; for( ; declaration != NULL; declaration = declaration->next) { if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY) continue; @@ -842,11 +1244,18 @@ void print_ast(const translation_unit_t *unit) } } +/** + * Returns true if a given expression is a compile time + * constant. + * + * @param expression the expression to check + */ bool is_constant_expression(const expression_t *expression) { switch(expression->kind) { case EXPR_CONST: + case EXPR_CHAR_CONST: case EXPR_STRING_LITERAL: case EXPR_WIDE_STRING_LITERAL: case EXPR_SIZEOF: @@ -950,24 +1359,41 @@ bool is_constant_expression(const expression_t *expression) 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); }