/* Subroutines shared by all languages that are variants of C.
- Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
This file is part of GNU CC.
Boston, MA 02111-1307, USA. */
#include "config.h"
+#include "system.h"
#include "tree.h"
#include "c-lex.h"
#include "c-tree.h"
#include "flags.h"
#include "obstack.h"
-#include <stdio.h>
-#include <ctype.h>
+#include "toplev.h"
+#include "output.h"
+
+#if USE_CPPLIB
+#include "cpplib.h"
+cpp_reader parse_in;
+cpp_options parse_options;
+static enum cpp_token cpp_token;
+#endif
+
+#ifndef WCHAR_TYPE_SIZE
+#ifdef INT_TYPE_SIZE
+#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
+#else
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+#endif
+#endif
extern struct obstack permanent_obstack;
-enum attrs {A_PACKED, A_NOCOMMON, A_NORETURN, A_CONST, A_T_UNION,
+/* Nonzero means the expression being parsed will never be evaluated.
+ This is a count, since unevaluated expressions can nest. */
+int skip_evaluation;
+
+enum attrs {A_PACKED, A_NOCOMMON, A_COMMON, A_NORETURN, A_CONST, A_T_UNION,
A_CONSTRUCTOR, A_DESTRUCTOR, A_MODE, A_SECTION, A_ALIGNED,
- A_UNUSED, A_FORMAT, A_WEAK, A_ALIAS};
+ A_UNUSED, A_FORMAT, A_FORMAT_ARG, A_WEAK, A_ALIAS};
+
+enum format_type { printf_format_type, scanf_format_type,
+ strftime_format_type };
static void declare_hidden_char_array PROTO((char *, char *));
static void add_attribute PROTO((enum attrs, char *,
int, int, int));
static void init_attributes PROTO((void));
+static void record_function_format PROTO((tree, tree, enum format_type,
+ int, int));
+static void record_international_format PROTO((tree, tree, int));
+
+/* Keep a stack of if statements. We record the number of compound
+ statements seen up to the if keyword, as well as the line number
+ and file of the if. If a potentially ambiguous else is seen, that
+ fact is recorded; the warning is issued when we can be sure that
+ the enclosing if statement does not have an else branch. */
+typedef struct
+{
+ int compstmt_count;
+ int line;
+ char *file;
+ int needs_warning;
+} if_elt;
+
+static if_elt *if_stack;
+
+/* Amount of space in the if statement stack. */
+static int if_stack_space = 0;
+
+/* Stack pointer. */
+static int if_stack_pointer = 0;
+
+/* Generate RTL for the start of an if-then, and record the start of it
+ for ambiguous else detection. */
+
+void
+c_expand_start_cond (cond, exitflag, compstmt_count)
+ tree cond;
+ int exitflag;
+ int compstmt_count;
+{
+ /* Make sure there is enough space on the stack. */
+ if (if_stack_space == 0)
+ {
+ if_stack_space = 10;
+ if_stack = (if_elt *)xmalloc (10 * sizeof (if_elt));
+ }
+ else if (if_stack_space == if_stack_pointer)
+ {
+ if_stack_space += 10;
+ if_stack = (if_elt *)xrealloc (if_stack, if_stack_space * sizeof (if_elt));
+ }
+
+ /* Record this if statement. */
+ if_stack[if_stack_pointer].compstmt_count = compstmt_count;
+ if_stack[if_stack_pointer].file = input_filename;
+ if_stack[if_stack_pointer].line = lineno;
+ if_stack[if_stack_pointer].needs_warning = 0;
+ if_stack_pointer++;
+
+ expand_start_cond (cond, exitflag);
+}
+
+/* Generate RTL for the end of an if-then. Optionally warn if a nested
+ if statement had an ambiguous else clause. */
+
+void
+c_expand_end_cond ()
+{
+ if_stack_pointer--;
+ if (if_stack[if_stack_pointer].needs_warning)
+ warning_with_file_and_line (if_stack[if_stack_pointer].file,
+ if_stack[if_stack_pointer].line,
+ "suggest explicit braces to avoid ambiguous `else'");
+ expand_end_cond ();
+}
+
+/* Generate RTL between the then-clause and the else-clause
+ of an if-then-else. */
+
+void
+c_expand_start_else ()
+{
+ /* An ambiguous else warning must be generated for the enclosing if
+ statement, unless we see an else branch for that one, too. */
+ if (warn_parentheses
+ && if_stack_pointer > 1
+ && (if_stack[if_stack_pointer - 1].compstmt_count
+ == if_stack[if_stack_pointer - 2].compstmt_count))
+ if_stack[if_stack_pointer - 2].needs_warning = 1;
+
+ /* Even if a nested if statement had an else branch, it can't be
+ ambiguous if this one also has an else. So don't warn in that
+ case. Also don't warn for any if statements nested in this else. */
+ if_stack[if_stack_pointer - 1].needs_warning = 0;
+ if_stack[if_stack_pointer - 1].compstmt_count--;
+
+ expand_start_else ();
+}
/* Make bindings for __FUNCTION__ and __PRETTY_FUNCTION__. */
}
else
{
- char *kind = "function";
- if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
- kind = "method";
/* Allow functions to be nameless (such as artificial ones). */
if (DECL_NAME (current_function_decl))
name = IDENTIFIER_POINTER (DECL_NAME (current_function_decl));
else
name = "";
- printable_name = (*decl_printable_name) (current_function_decl, &kind);
+ printable_name = (*decl_printable_name) (current_function_decl, 2);
}
declare_hidden_char_array ("__FUNCTION__", name);
or if we want to give warnings for large objects, make a bigger one. */
vlen = strlen (value) + 1;
type = char_array_type_node;
- if (TREE_INT_CST_LOW (TYPE_MAX_VALUE (TREE_TYPE (type))) < vlen
+ if (TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) < vlen
|| warn_larger_than)
type = build_array_type (char_type_node,
build_index_type (build_int_2 (vlen, 0)));
{
int i;
for (i = 0; i < len; i++)
- ((int *) q)[i] = TREE_STRING_POINTER (t)[i];
+ {
+ if (WCHAR_TYPE_SIZE == HOST_BITS_PER_SHORT)
+ ((short *) q)[i] = TREE_STRING_POINTER (t)[i];
+ else
+ ((int *) q)[i] = TREE_STRING_POINTER (t)[i];
+ }
q += len * wchar_bytes;
}
}
wide_flag = 1;
}
- /* Compute the number of elements, for the array type. */
+ /* Compute the number of elements, for the array type. */
nchars = wide_flag ? length / wchar_bytes : length;
/* Create the array type for the string constant.
{
add_attribute (A_PACKED, "packed", 0, 0, 0);
add_attribute (A_NOCOMMON, "nocommon", 0, 0, 1);
+ add_attribute (A_COMMON, "common", 0, 0, 1);
add_attribute (A_NORETURN, "noreturn", 0, 0, 1);
add_attribute (A_NORETURN, "volatile", 0, 0, 1);
- add_attribute (A_UNUSED, "unused", 0, 0, 1);
+ add_attribute (A_UNUSED, "unused", 0, 0, 0);
add_attribute (A_CONST, "const", 0, 0, 1);
add_attribute (A_T_UNION, "transparent_union", 0, 0, 0);
add_attribute (A_CONSTRUCTOR, "constructor", 0, 0, 1);
add_attribute (A_SECTION, "section", 1, 1, 1);
add_attribute (A_ALIGNED, "aligned", 0, 1, 0);
add_attribute (A_FORMAT, "format", 3, 3, 1);
+ add_attribute (A_FORMAT_ARG, "format_arg", 1, 1, 1);
add_attribute (A_WEAK, "weak", 0, 0, 1);
add_attribute (A_ALIAS, "alias", 1, 1, 1);
}
/* Process the attributes listed in ATTRIBUTES and PREFIX_ATTRIBUTES
and install them in NODE, which is either a DECL (including a TYPE_DECL)
or a TYPE. PREFIX_ATTRIBUTES can appear after the declaration specifiers
- and declaration modifiers but before the declaration proper. */
+ and declaration modifiers but before the declaration proper. */
void
decl_attributes (node, attributes, prefix_attributes)
tree node, attributes, prefix_attributes;
{
- tree decl = 0, type;
- int is_type;
+ tree decl = 0, type = 0;
+ int is_type = 0;
tree a;
if (attrtab_idx == 0)
tree args = TREE_VALUE (a);
int i;
enum attrs id;
-
+
for (i = 0; i < attrtab_idx; i++)
if (attrtab[i].name == name)
break;
if (! valid_machine_attribute (name, args, decl, type))
warning ("`%s' attribute directive ignored",
IDENTIFIER_POINTER (name));
+ else if (decl != 0)
+ type = TREE_TYPE (decl);
continue;
}
else if (attrtab[i].decl_req && decl == 0)
switch (id)
{
case A_PACKED:
- if (decl == 0)
+ if (is_type)
TYPE_PACKED (type) = 1;
else if (TREE_CODE (decl) == FIELD_DECL)
DECL_PACKED (decl) = 1;
warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
break;
+ case A_COMMON:
+ if (TREE_CODE (decl) == VAR_DECL)
+ DECL_COMMON (decl) = 1;
+ else
+ warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
+ break;
+
case A_NORETURN:
if (TREE_CODE (decl) == FUNCTION_DECL)
TREE_THIS_VOLATILE (decl) = 1;
else if (TREE_CODE (type) == POINTER_TYPE
&& TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
- TREE_TYPE (decl) = type
+ TREE_TYPE (decl) = type
= build_pointer_type
(build_type_variant (TREE_TYPE (type),
TREE_READONLY (TREE_TYPE (type)), 1));
break;
case A_UNUSED:
- if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == VAR_DECL
- || TREE_CODE (decl) == FUNCTION_DECL)
+ if (is_type)
+ TREE_USED (type) = 1;
+ else if (TREE_CODE (decl) == PARM_DECL
+ || TREE_CODE (decl) == VAR_DECL
+ || TREE_CODE (decl) == FUNCTION_DECL)
TREE_USED (decl) = 1;
else
warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
break;
case A_T_UNION:
- if (decl != 0 && TREE_CODE (decl) == PARM_DECL
+ if (is_type
&& TREE_CODE (type) == UNION_TYPE
- && TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (type)))
- DECL_TRANSPARENT_UNION (decl) = 1;
- else if (is_type
+ && (decl == 0
+ || (TYPE_FIELDS (type) != 0
+ && TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (type)))))
+ TYPE_TRANSPARENT_UNION (type) = 1;
+ else if (decl != 0 && TREE_CODE (decl) == PARM_DECL
&& TREE_CODE (type) == UNION_TYPE
&& TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (type)))
- TYPE_TRANSPARENT_UNION (type) = 1;
+ DECL_TRANSPARENT_UNION (decl) = 1;
else
warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
break;
|| TREE_CODE (decl) == VAR_DECL)
&& TREE_CODE (TREE_VALUE (args)) == STRING_CST)
{
- if (TREE_CODE (decl) == VAR_DECL
- && current_function_decl != NULL_TREE)
+ if (TREE_CODE (decl) == VAR_DECL
+ && current_function_decl != NULL_TREE
+ && ! TREE_STATIC (decl))
error_with_decl (decl,
"section attribute cannot be specified for local variables");
/* The decl may have already been given a section attribute from
case A_ALIGNED:
{
tree align_expr
- = args ? TREE_VALUE (args) : size_int (BIGGEST_ALIGNMENT);
+ = (args ? TREE_VALUE (args)
+ : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
int align;
/* Strip any NOPs of any kind. */
|| TREE_CODE (align_expr) == CONVERT_EXPR
|| TREE_CODE (align_expr) == NON_LVALUE_EXPR)
align_expr = TREE_OPERAND (align_expr, 0);
-
+
if (TREE_CODE (align_expr) != INTEGER_CST)
{
error ("requested alignment is not a constant");
case A_FORMAT:
{
- tree format_type = TREE_VALUE (args);
+ tree format_type_id = TREE_VALUE (args);
tree format_num_expr = TREE_VALUE (TREE_CHAIN (args));
tree first_arg_num_expr
= TREE_VALUE (TREE_CHAIN (TREE_CHAIN (args)));
int format_num;
int first_arg_num;
- int is_scan;
+ enum format_type format_type;
tree argument;
int arg_num;
-
+
if (TREE_CODE (decl) != FUNCTION_DECL)
{
error_with_decl (decl,
continue;
}
- if (TREE_CODE (format_type) == IDENTIFIER_NODE
- && (!strcmp (IDENTIFIER_POINTER (format_type), "printf")
- || !strcmp (IDENTIFIER_POINTER (format_type),
- "__printf__")))
- is_scan = 0;
- else if (TREE_CODE (format_type) == IDENTIFIER_NODE
- && (!strcmp (IDENTIFIER_POINTER (format_type), "scanf")
- || !strcmp (IDENTIFIER_POINTER (format_type),
- "__scanf__")))
- is_scan = 1;
- else
+ if (TREE_CODE (format_type_id) != IDENTIFIER_NODE)
{
- error ("unrecognized format specifier for `%s'");
+ error ("unrecognized format specifier");
continue;
}
+ else
+ {
+ char *p = IDENTIFIER_POINTER (format_type_id);
+
+ if (!strcmp (p, "printf") || !strcmp (p, "__printf__"))
+ format_type = printf_format_type;
+ else if (!strcmp (p, "scanf") || !strcmp (p, "__scanf__"))
+ format_type = scanf_format_type;
+ else if (!strcmp (p, "strftime")
+ || !strcmp (p, "__strftime__"))
+ format_type = strftime_format_type;
+ else
+ {
+ error ("`%s' is an unrecognized format function type", p);
+ continue;
+ }
+ }
/* Strip any conversions from the string index and first arg number
and verify they are constants. */
if (first_arg_num != 0)
{
/* Verify that first_arg_num points to the last arg,
- the ... */
+ the ... */
while (argument)
arg_num++, argument = TREE_CHAIN (argument);
if (arg_num != first_arg_num)
record_function_format (DECL_NAME (decl),
DECL_ASSEMBLER_NAME (decl),
- is_scan, format_num, first_arg_num);
+ format_type, format_num, first_arg_num);
+ break;
+ }
+
+ case A_FORMAT_ARG:
+ {
+ tree format_num_expr = TREE_VALUE (args);
+ int format_num, arg_num;
+ tree argument;
+
+ if (TREE_CODE (decl) != FUNCTION_DECL)
+ {
+ error_with_decl (decl,
+ "argument format specified for non-function `%s'");
+ continue;
+ }
+
+ /* Strip any conversions from the first arg number and verify it
+ is a constant. */
+ while (TREE_CODE (format_num_expr) == NOP_EXPR
+ || TREE_CODE (format_num_expr) == CONVERT_EXPR
+ || TREE_CODE (format_num_expr) == NON_LVALUE_EXPR)
+ format_num_expr = TREE_OPERAND (format_num_expr, 0);
+
+ if (TREE_CODE (format_num_expr) != INTEGER_CST)
+ {
+ error ("format string has non-constant operand number");
+ continue;
+ }
+
+ format_num = TREE_INT_CST_LOW (format_num_expr);
+
+ /* If a parameter list is specified, verify that the format_num
+ argument is actually a string, in case the format attribute
+ is in error. */
+ argument = TYPE_ARG_TYPES (type);
+ if (argument)
+ {
+ for (arg_num = 1; ; ++arg_num)
+ {
+ if (argument == 0 || arg_num == format_num)
+ break;
+ argument = TREE_CHAIN (argument);
+ }
+ if (! argument
+ || TREE_CODE (TREE_VALUE (argument)) != POINTER_TYPE
+ || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_VALUE (argument)))
+ != char_type_node))
+ {
+ error ("format string arg not a string type");
+ continue;
+ }
+ }
+
+ if (TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) != POINTER_TYPE
+ || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (TREE_TYPE (decl))))
+ != char_type_node))
+ {
+ error ("function does not return string type");
+ continue;
+ }
+
+ record_international_format (DECL_NAME (decl),
+ DECL_ASSEMBLER_NAME (decl),
+ format_num);
break;
}
case A_ALIAS:
if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl))
- || TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl))
+ || (TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl)))
error_with_decl (decl,
"`%s' defined both normally and as an alias");
else if (decl_function_context (decl) == 0)
}
}
}
+
+/* Split SPECS_ATTRS, a list of declspecs and prefix attributes, into two
+ lists. SPECS_ATTRS may also be just a typespec (eg: RECORD_TYPE).
+
+ The head of the declspec list is stored in DECLSPECS.
+ The head of the attribute list is stored in PREFIX_ATTRIBUTES.
+
+ Note that attributes in SPECS_ATTRS are stored in the TREE_PURPOSE of
+ the list elements. We drop the containing TREE_LIST nodes and link the
+ resulting attributes together the way decl_attributes expects them. */
+
+void
+split_specs_attrs (specs_attrs, declspecs, prefix_attributes)
+ tree specs_attrs;
+ tree *declspecs, *prefix_attributes;
+{
+ tree t, s, a, next, specs, attrs;
+
+ /* This can happen in c++ (eg: decl: typespec initdecls ';'). */
+ if (specs_attrs != NULL_TREE
+ && TREE_CODE (specs_attrs) != TREE_LIST)
+ {
+ *declspecs = specs_attrs;
+ *prefix_attributes = NULL_TREE;
+ return;
+ }
+
+ /* Remember to keep the lists in the same order, element-wise. */
+
+ specs = s = NULL_TREE;
+ attrs = a = NULL_TREE;
+ for (t = specs_attrs; t; t = next)
+ {
+ next = TREE_CHAIN (t);
+ /* Declspecs have a non-NULL TREE_VALUE. */
+ if (TREE_VALUE (t) != NULL_TREE)
+ {
+ if (specs == NULL_TREE)
+ specs = s = t;
+ else
+ {
+ TREE_CHAIN (s) = t;
+ s = t;
+ }
+ }
+ else
+ {
+ if (attrs == NULL_TREE)
+ attrs = a = TREE_PURPOSE (t);
+ else
+ {
+ TREE_CHAIN (a) = TREE_PURPOSE (t);
+ a = TREE_PURPOSE (t);
+ }
+ /* More attrs can be linked here, move A to the end. */
+ while (TREE_CHAIN (a) != NULL_TREE)
+ a = TREE_CHAIN (a);
+ }
+ }
+
+ /* Terminate the lists. */
+ if (s != NULL_TREE)
+ TREE_CHAIN (s) = NULL_TREE;
+ if (a != NULL_TREE)
+ TREE_CHAIN (a) = NULL_TREE;
+
+ /* All done. */
+ *declspecs = specs;
+ *prefix_attributes = attrs;
+}
+
+/* Strip attributes from SPECS_ATTRS, a list of declspecs and attributes.
+ This function is used by the parser when a rule will accept attributes
+ in a particular position, but we don't want to support that just yet.
+
+ A warning is issued for every ignored attribute. */
+
+tree
+strip_attrs (specs_attrs)
+ tree specs_attrs;
+{
+ tree specs, attrs;
+
+ split_specs_attrs (specs_attrs, &specs, &attrs);
+
+ while (attrs)
+ {
+ warning ("`%s' attribute ignored",
+ IDENTIFIER_POINTER (TREE_PURPOSE (attrs)));
+ attrs = TREE_CHAIN (attrs);
+ }
+
+ return specs;
+}
\f
/* Check a printf/fprintf/sprintf/scanf/fscanf/sscanf format against
a parameter list. */
#define T_D &double_type_node
#define T_LD &long_double_type_node
#define T_C &char_type_node
+#define T_UC &unsigned_char_type_node
#define T_V &void_type_node
#define T_W &wchar_type_node
#define T_ST &sizetype
int pointer_count;
/* Type of argument if no length modifier is used. */
tree *nolen;
+ /* Type of argument if length modifier for shortening to byte is used.
+ If NULL, then this modifier is not allowed. */
+ tree *hhlen;
/* Type of argument if length modifier for shortening is used.
If NULL, then this modifier is not allowed. */
tree *hlen;
/* Type of argument if length modifier `L' is used.
If NULL, then this modifier is not allowed. */
tree *bigllen;
+ /* Type of argument if length modifier `Z' is used.
+ If NULL, then this modifier is not allowed. */
+ tree *zlen;
/* List of other modifier characters allowed with these options. */
char *flag_chars;
} format_char_info;
static format_char_info print_char_table[] = {
- { "di", 0, T_I, T_I, T_L, T_LL, T_LL, "-wp0 +" },
- { "oxX", 0, T_UI, T_UI, T_UL, T_ULL, T_ULL, "-wp0#" },
- { "u", 0, T_UI, T_UI, T_UL, T_ULL, T_ULL, "-wp0" },
-/* Two GNU extensions. */
- { "Z", 0, T_ST, NULL, NULL, NULL, NULL, "-wp0" },
- { "m", 0, T_V, NULL, NULL, NULL, NULL, "-wp" },
- { "feEgG", 0, T_D, NULL, NULL, NULL, T_LD, "-wp0 +#" },
- { "c", 0, T_I, NULL, T_W, NULL, NULL, "-w" },
- { "C", 0, T_W, NULL, NULL, NULL, NULL, "-w" },
- { "s", 1, T_C, NULL, T_W, NULL, NULL, "-wp" },
- { "S", 1, T_W, NULL, NULL, NULL, NULL, "-wp" },
- { "p", 1, T_V, NULL, NULL, NULL, NULL, "-w" },
- { "n", 1, T_I, T_S, T_L, T_LL, NULL, "" },
+ { "di", 0, T_I, T_I, T_I, T_L, T_LL, T_LL, T_ST, "-wp0 +" },
+ { "oxX", 0, T_UI, T_UI, T_UI, T_UL, T_ULL, T_ULL, T_ST, "-wp0#" },
+ { "u", 0, T_UI, T_UI, T_UI, T_UL, T_ULL, T_ULL, T_ST, "-wp0" },
+/* A GNU extension. */
+ { "m", 0, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "-wp" },
+ { "feEgGaA", 0, T_D, NULL, NULL, NULL, NULL, T_LD, NULL, "-wp0 +#" },
+ { "c", 0, T_I, NULL, NULL, T_W, NULL, NULL, NULL, "-w" },
+ { "C", 0, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "-w" },
+ { "s", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "-wp" },
+ { "S", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "-wp" },
+ { "p", 1, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "-w" },
+ { "n", 1, T_I, NULL, T_S, T_L, T_LL, NULL, NULL, "" },
{ NULL }
};
static format_char_info scan_char_table[] = {
- { "di", 1, T_I, T_S, T_L, T_LL, T_LL, "*" },
- { "ouxX", 1, T_UI, T_US, T_UL, T_ULL, T_ULL, "*" },
- { "efgEG", 1, T_F, NULL, T_D, NULL, T_LD, "*" },
- { "sc", 1, T_C, NULL, T_W, NULL, NULL, "*a" },
- { "[", 1, T_C, NULL, NULL, NULL, NULL, "*a" },
- { "C", 1, T_W, NULL, NULL, NULL, NULL, "*" },
- { "S", 1, T_W, NULL, NULL, NULL, NULL, "*" },
- { "p", 2, T_V, NULL, NULL, NULL, NULL, "*" },
- { "n", 1, T_I, T_S, T_L, T_LL, NULL, "" },
+ { "di", 1, T_I, T_C, T_S, T_L, T_LL, T_LL, NULL, "*" },
+ { "ouxX", 1, T_UI, T_UC, T_US, T_UL, T_ULL, T_ULL, NULL, "*" },
+ { "efgEGaA", 1, T_F, NULL, NULL, T_D, NULL, T_LD, NULL, "*" },
+ { "c", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "*" },
+ { "s", 1, T_C, NULL, NULL, T_W, NULL, NULL, NULL, "*a" },
+ { "[", 1, T_C, NULL, NULL, NULL, NULL, NULL, NULL, "*a" },
+ { "C", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "*" },
+ { "S", 1, T_W, NULL, NULL, NULL, NULL, NULL, NULL, "*a" },
+ { "p", 2, T_V, NULL, NULL, NULL, NULL, NULL, NULL, "*" },
+ { "n", 1, T_I, T_C, T_S, T_L, T_LL, NULL, NULL, "" },
+ { NULL }
+};
+
+/* Handle format characters recognized by glibc's strftime.c.
+ '2' - MUST do years as only two digits
+ '3' - MAY do years as only two digits (depending on locale)
+ 'E' - E modifier is acceptable
+ 'O' - O modifier is acceptable to Standard C
+ 'o' - O modifier is acceptable as a GNU extension
+ 'G' - other GNU extensions */
+
+static format_char_info time_char_table[] = {
+ { "y", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2EO-_0w" },
+ { "D", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2" },
+ { "g", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "2O-_0w" },
+ { "cx", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "3E" },
+ { "%RTXnrt", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "" },
+ { "P", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "G" },
+ { "HIMSUWdemw", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0Ow" },
+ { "Vju", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0Oow" },
+ { "Gklsz", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0OGw" },
+ { "ABZa", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "^#" },
+ { "p", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "#" },
+ { "bh", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "^" },
+ { "CY", 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "-_0EOw" },
{ NULL }
};
-typedef struct function_format_info {
+typedef struct function_format_info
+{
struct function_format_info *next; /* next structure on the list */
tree name; /* identifier such as "printf" */
tree assembler_name; /* optional mangled identifier (for C++) */
- int is_scan; /* TRUE if *scanf */
+ enum format_type format_type; /* type of format (printf, scanf, etc.) */
int format_num; /* number of format argument */
int first_arg_num; /* number of first arg (zero for varargs) */
} function_format_info;
static function_format_info *function_format_list = NULL;
-static void check_format_info PROTO((function_format_info *, tree));
+typedef struct international_format_info
+{
+ struct international_format_info *next; /* next structure on the list */
+ tree name; /* identifier such as "gettext" */
+ tree assembler_name; /* optional mangled identifier (for C++) */
+ int format_num; /* number of format argument */
+} international_format_info;
+
+static international_format_info *international_format_list = NULL;
+
+static void check_format_info PROTO((function_format_info *, tree));
/* Initialize the table of functions to perform format checking on.
The ANSI functions are always checked (whether <stdio.h> is
included or not), since it is common to call printf without
including <stdio.h>. There shouldn't be a problem with this,
since ANSI reserves these function names whether you include the
- header file or not. In any case, the checking is harmless. */
+ header file or not. In any case, the checking is harmless.
+
+ Also initialize the name of function that modify the format string for
+ internationalization purposes. */
void
init_function_format_info ()
{
- record_function_format (get_identifier ("printf"), NULL_TREE, 0, 1, 2);
- record_function_format (get_identifier ("fprintf"), NULL_TREE, 0, 2, 3);
- record_function_format (get_identifier ("sprintf"), NULL_TREE, 0, 2, 3);
- record_function_format (get_identifier ("scanf"), NULL_TREE, 1, 1, 2);
- record_function_format (get_identifier ("fscanf"), NULL_TREE, 1, 2, 3);
- record_function_format (get_identifier ("sscanf"), NULL_TREE, 1, 2, 3);
- record_function_format (get_identifier ("vprintf"), NULL_TREE, 0, 1, 0);
- record_function_format (get_identifier ("vfprintf"), NULL_TREE, 0, 2, 0);
- record_function_format (get_identifier ("vsprintf"), NULL_TREE, 0, 2, 0);
+ record_function_format (get_identifier ("printf"), NULL_TREE,
+ printf_format_type, 1, 2);
+ record_function_format (get_identifier ("fprintf"), NULL_TREE,
+ printf_format_type, 2, 3);
+ record_function_format (get_identifier ("sprintf"), NULL_TREE,
+ printf_format_type, 2, 3);
+ record_function_format (get_identifier ("scanf"), NULL_TREE,
+ scanf_format_type, 1, 2);
+ record_function_format (get_identifier ("fscanf"), NULL_TREE,
+ scanf_format_type, 2, 3);
+ record_function_format (get_identifier ("sscanf"), NULL_TREE,
+ scanf_format_type, 2, 3);
+ record_function_format (get_identifier ("vprintf"), NULL_TREE,
+ printf_format_type, 1, 0);
+ record_function_format (get_identifier ("vfprintf"), NULL_TREE,
+ printf_format_type, 2, 0);
+ record_function_format (get_identifier ("vsprintf"), NULL_TREE,
+ printf_format_type, 2, 0);
+ record_function_format (get_identifier ("strftime"), NULL_TREE,
+ strftime_format_type, 3, 0);
+
+ record_international_format (get_identifier ("gettext"), NULL_TREE, 1);
+ record_international_format (get_identifier ("dgettext"), NULL_TREE, 2);
+ record_international_format (get_identifier ("dcgettext"), NULL_TREE, 2);
}
/* Record information for argument format checking. FUNCTION_IDENT is
the identifier node for the name of the function to check (its decl
- need not exist yet). IS_SCAN is true for scanf-type format checking;
- false indicates printf-style format checking. FORMAT_NUM is the number
+ need not exist yet).
+ FORMAT_TYPE specifies the type of format checking. FORMAT_NUM is the number
of the argument which is the format control string (starting from 1).
FIRST_ARG_NUM is the number of the first actual argument to check
- against teh format string, or zero if no checking is not be done
+ against the format string, or zero if no checking is not be done
(e.g. for varargs such as vfprintf). */
-void
-record_function_format (name, assembler_name, is_scan,
+static void
+record_function_format (name, assembler_name, format_type,
format_num, first_arg_num)
tree name;
tree assembler_name;
- int is_scan;
+ enum format_type format_type;
int format_num;
int first_arg_num;
{
info->assembler_name = assembler_name;
}
- info->is_scan = is_scan;
+ info->format_type = format_type;
info->format_num = format_num;
info->first_arg_num = first_arg_num;
}
+/* Record information for the names of function that modify the format
+ argument to format functions. FUNCTION_IDENT is the identifier node for
+ the name of the function (its decl need not exist yet) and FORMAT_NUM is
+ the number of the argument which is the format control string (starting
+ from 1). */
+
+static void
+record_international_format (name, assembler_name, format_num)
+ tree name;
+ tree assembler_name;
+ int format_num;
+{
+ international_format_info *info;
+
+ /* Re-use existing structure if it's there. */
+
+ for (info = international_format_list; info; info = info->next)
+ {
+ if (info->name == name && info->assembler_name == assembler_name)
+ break;
+ }
+
+ if (! info)
+ {
+ info
+ = (international_format_info *)
+ xmalloc (sizeof (international_format_info));
+ info->next = international_format_list;
+ international_format_list = info;
+
+ info->name = name;
+ info->assembler_name = assembler_name;
+ }
+
+ info->format_num = format_num;
+}
+
static char tfaff[] = "too few arguments for format";
\f
/* Check the argument list of a call to printf, scanf, etc.
tree first_fillin_param;
char *format_chars;
format_char_info *fci;
- static char message[132];
char flag_chars[8];
int has_operand_number = 0;
params = TREE_CHAIN (params);
if (format_tree == 0)
return;
+
/* We can only check the format if it's a string constant. */
while (TREE_CODE (format_tree) == NOP_EXPR)
format_tree = TREE_OPERAND (format_tree, 0); /* strip coercion */
- if (format_tree == null_pointer_node)
+
+ if (TREE_CODE (format_tree) == CALL_EXPR
+ && TREE_CODE (TREE_OPERAND (format_tree, 0)) == ADDR_EXPR
+ && (TREE_CODE (TREE_OPERAND (TREE_OPERAND (format_tree, 0), 0))
+ == FUNCTION_DECL))
+ {
+ tree function = TREE_OPERAND (TREE_OPERAND (format_tree, 0), 0);
+
+ /* See if this is a call to a known internationalization function
+ that modifies the format arg. */
+ international_format_info *info;
+
+ for (info = international_format_list; info; info = info->next)
+ if (info->assembler_name
+ ? (info->assembler_name == DECL_ASSEMBLER_NAME (function))
+ : (info->name == DECL_NAME (function)))
+ {
+ tree inner_args;
+ int i;
+
+ for (inner_args = TREE_OPERAND (format_tree, 1), i = 1;
+ inner_args != 0;
+ inner_args = TREE_CHAIN (inner_args), i++)
+ if (i == info->format_num)
+ {
+ format_tree = TREE_VALUE (inner_args);
+
+ while (TREE_CODE (format_tree) == NOP_EXPR)
+ format_tree = TREE_OPERAND (format_tree, 0);
+ }
+ }
+ }
+
+ if (integer_zerop (format_tree))
{
warning ("null format string");
return;
}
flag_chars[0] = 0;
suppressed = wide = precise = FALSE;
- if (info->is_scan)
+ if (info->format_type == scanf_format_type)
{
suppressed = *format_chars == '*';
if (suppressed)
++format_chars;
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
++format_chars;
}
- else
+ else if (info->format_type == strftime_format_type)
+ {
+ while (*format_chars != 0 && index ("_-0^#", *format_chars) != 0)
+ {
+ if (pedantic)
+ warning ("ANSI C does not support the strftime `%c' flag",
+ *format_chars);
+ if (index (flag_chars, *format_chars) != 0)
+ {
+ warning ("repeated `%c' flag in format",
+ *format_chars);
+ ++format_chars;
+ }
+ else
+ {
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
+ }
+ }
+ while (ISDIGIT ((unsigned char) *format_chars))
+ {
+ wide = TRUE;
+ ++format_chars;
+ }
+ if (wide && pedantic)
+ warning ("ANSI C does not support strftime format width");
+ if (*format_chars == 'E' || *format_chars == 'O')
+ {
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
+ if (*format_chars == 'E' || *format_chars == 'O')
+ {
+ warning ("multiple E/O modifiers in format");
+ while (*format_chars == 'E' || *format_chars == 'O')
+ ++format_chars;
+ }
+ }
+ }
+ else if (info->format_type == printf_format_type)
{
/* See if we have a number followed by a dollar sign. If we do,
it is an operand number, so set PARAMS to that operand. */
while (*format_chars != 0 && index (" +#0-", *format_chars) != 0)
{
if (index (flag_chars, *format_chars) != 0)
+ warning ("repeated `%c' flag in format", *format_chars++);
+ else
{
- sprintf (message, "repeated `%c' flag in format",
- *format_chars);
- warning (message);
+ i = strlen (flag_chars);
+ flag_chars[i++] = *format_chars++;
+ flag_chars[i] = 0;
}
- i = strlen (flag_chars);
- flag_chars[i++] = *format_chars++;
- flag_chars[i] = 0;
}
- /* "If the space and + flags both appear,
+ /* "If the space and + flags both appear,
the space flag will be ignored." */
if (index (flag_chars, ' ') != 0
&& index (flag_chars, '+') != 0)
&&
(TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
!= unsigned_type_node))
- {
- sprintf (message,
- "field width is not type int (arg %d)",
- arg_num);
- warning (message);
- }
+ warning ("field width is not type int (arg %d)", arg_num);
}
}
else
{
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
{
wide = TRUE;
++format_chars;
{
precise = TRUE;
++format_chars;
- if (*format_chars != '*' && !isdigit (*format_chars))
+ if (*format_chars != '*' && !ISDIGIT (*format_chars))
warning ("`.' not followed by `*' or digit in format");
/* "...a...precision...may be indicated by an asterisk.
In this case, an int argument supplies the...precision." */
++arg_num;
if (TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
!= integer_type_node)
- {
- sprintf (message,
- "field width is not type int (arg %d)",
- arg_num);
- warning (message);
- }
+ warning ("field width is not type int (arg %d)",
+ arg_num);
}
}
else
{
- while (isdigit (*format_chars))
+ while (ISDIGIT (*format_chars))
++format_chars;
}
}
}
- if (*format_chars == 'h' || *format_chars == 'l' || *format_chars == 'q' ||
- *format_chars == 'L')
- length_char = *format_chars++;
- else
- length_char = 0;
- if (length_char == 'l' && *format_chars == 'l')
- length_char = 'q', format_chars++;
+
aflag = 0;
- if (*format_chars == 'a')
- {
- aflag = 1;
- format_chars++;
- }
- if (suppressed && length_char != 0)
+
+ if (info->format_type != strftime_format_type)
{
- sprintf (message,
- "use of `*' and `%c' together in format",
- length_char);
- warning (message);
+ if (*format_chars == 'h' || *format_chars == 'l')
+ length_char = *format_chars++;
+ else if (*format_chars == 'q' || *format_chars == 'L')
+ {
+ length_char = *format_chars++;
+ if (pedantic)
+ warning ("ANSI C does not support the `%c' length modifier",
+ length_char);
+ }
+ else if (*format_chars == 'Z')
+ {
+ length_char = *format_chars++;
+ if (pedantic)
+ warning ("ANSI C does not support the `Z' length modifier");
+ }
+ else
+ length_char = 0;
+ if (length_char == 'l' && *format_chars == 'l')
+ {
+ length_char = 'q', format_chars++;
+ /* FIXME: Is allowed in ISO C 9x. */
+ if (pedantic)
+ warning ("ANSI C does not support the `ll' length modifier");
+ }
+ else if (length_char == 'h' && *format_chars == 'h')
+ {
+ length_char = 'H', format_chars++;
+ /* FIXME: Is allowed in ISO C 9x. */
+ if (pedantic)
+ warning ("ANSI C does not support the `hh' length modifier");
+ }
+ if (*format_chars == 'a' && info->format_type == scanf_format_type)
+ {
+ if (format_chars[1] == 's' || format_chars[1] == 'S'
+ || format_chars[1] == '[')
+ {
+ /* `a' is used as a flag. */
+ aflag = 1;
+ format_chars++;
+ }
+ }
+ if (suppressed && length_char != 0)
+ warning ("use of `*' and `%c' together in format", length_char);
}
format_char = *format_chars;
- if (format_char == 0)
+ if (format_char == 0
+ || (info->format_type != strftime_format_type && format_char == '%'))
{
warning ("conversion lacks type at end of format");
continue;
}
+ /* The m, C, and S formats are GNU extensions. */
+ if (pedantic && info->format_type != strftime_format_type
+ && (format_char == 'm' || format_char == 'C' || format_char == 'S'))
+ warning ("ANSI C does not support the `%c' format", format_char);
+ /* ??? The a and A formats are C9X extensions, and should be allowed
+ when a C9X option is added. */
+ if (pedantic && info->format_type != strftime_format_type
+ && (format_char == 'a' || format_char == 'A'))
+ warning ("ANSI C does not support the `%c' format", format_char);
format_chars++;
- fci = info->is_scan ? scan_char_table : print_char_table;
+ switch (info->format_type)
+ {
+ case printf_format_type:
+ fci = print_char_table;
+ break;
+ case scanf_format_type:
+ fci = scan_char_table;
+ break;
+ case strftime_format_type:
+ fci = time_char_table;
+ break;
+ default:
+ abort ();
+ }
while (fci->format_chars != 0
&& index (fci->format_chars, format_char) == 0)
++fci;
if (fci->format_chars == 0)
{
if (format_char >= 040 && format_char < 0177)
- sprintf (message,
- "unknown conversion type character `%c' in format",
+ warning ("unknown conversion type character `%c' in format",
format_char);
else
- sprintf (message,
- "unknown conversion type character 0x%x in format",
+ warning ("unknown conversion type character 0x%x in format",
format_char);
- warning (message);
continue;
}
- if (wide && index (fci->flag_chars, 'w') == 0)
+ if (pedantic)
{
- sprintf (message, "width used with `%c' format",
- format_char);
- warning (message);
+ if (index (fci->flag_chars, 'G') != 0)
+ warning ("ANSI C does not support `%%%c'", format_char);
+ if (index (fci->flag_chars, 'o') != 0
+ && index (flag_chars, 'O') != 0)
+ warning ("ANSI C does not support `%%O%c'", format_char);
}
+ if (wide && index (fci->flag_chars, 'w') == 0)
+ warning ("width used with `%c' format", format_char);
+ if (index (fci->flag_chars, '2') != 0)
+ warning ("`%%%c' yields only last 2 digits of year", format_char);
+ else if (index (fci->flag_chars, '3') != 0)
+ warning ("`%%%c' yields only last 2 digits of year in some locales",
+ format_char);
if (precise && index (fci->flag_chars, 'p') == 0)
- {
- sprintf (message, "precision used with `%c' format",
- format_char);
- warning (message);
- }
+ warning ("precision used with `%c' format", format_char);
if (aflag && index (fci->flag_chars, 'a') == 0)
{
- sprintf (message, "`a' flag used with `%c' format",
- format_char);
- warning (message);
+ warning ("`a' flag used with `%c' format", format_char);
+ /* To simplify the following code. */
+ aflag = 0;
}
- if (info->is_scan && format_char == '[')
+ /* The a flag is a GNU extension. */
+ else if (pedantic && aflag)
+ warning ("ANSI C does not support the `a' flag");
+ if (info->format_type == scanf_format_type && format_char == '[')
{
/* Skip over scan set, in case it happens to have '%' in it. */
if (*format_chars == '^')
while (*format_chars && *format_chars != ']')
++format_chars;
if (*format_chars != ']')
- /* The end of the format string was reached. */
- warning ("no closing `]' for `%%[' format");
+ /* The end of the format string was reached. */
+ warning ("no closing `]' for `%%[' format");
}
if (suppressed)
{
if (index (fci->flag_chars, '*') == 0)
- {
- sprintf (message,
- "suppression of `%c' conversion in format",
- format_char);
- warning (message);
- }
+ warning ("suppression of `%c' conversion in format", format_char);
continue;
}
for (i = 0; flag_chars[i] != 0; ++i)
{
if (index (fci->flag_chars, flag_chars[i]) == 0)
- {
- sprintf (message, "flag `%c' used with type `%c'",
- flag_chars[i], format_char);
- warning (message);
- }
+ warning ("flag `%c' used with type `%c'",
+ flag_chars[i], format_char);
}
+ if (info->format_type == strftime_format_type)
+ continue;
if (precise && index (flag_chars, '0') != 0
&& (format_char == 'd' || format_char == 'i'
|| format_char == 'o' || format_char == 'u'
|| format_char == 'x' || format_char == 'x'))
- {
- sprintf (message,
- "precision and `0' flag not both allowed with `%c' format",
- format_char);
- warning (message);
- }
+ warning ("`0' flag ignored with precision specifier and `%c' format",
+ format_char);
switch (length_char)
{
default: wanted_type = fci->nolen ? *(fci->nolen) : 0; break;
+ case 'H': wanted_type = fci->hhlen ? *(fci->hhlen) : 0; break;
case 'h': wanted_type = fci->hlen ? *(fci->hlen) : 0; break;
case 'l': wanted_type = fci->llen ? *(fci->llen) : 0; break;
case 'q': wanted_type = fci->qlen ? *(fci->qlen) : 0; break;
case 'L': wanted_type = fci->bigllen ? *(fci->bigllen) : 0; break;
+ case 'Z': wanted_type = fci->zlen ? *fci->zlen : 0; break;
}
if (wanted_type == 0)
- {
- sprintf (message,
- "use of `%c' length character with `%c' type character",
- length_char, format_char);
- warning (message);
- }
-
- /*
- ** XXX -- should kvetch about stuff such as
- ** {
- ** const int i;
- **
- ** scanf ("%d", &i);
- ** }
- */
+ warning ("use of `%c' length character with `%c' type character",
+ length_char, format_char);
/* Finally. . .check type of argument against desired type! */
if (info->first_arg_num == 0)
++arg_num;
cur_type = TREE_TYPE (cur_param);
+ STRIP_NOPS (cur_param);
+
/* Check the types of any additional pointer arguments
that precede the "real" argument. */
- for (i = 0; i < fci->pointer_count; ++i)
+ for (i = 0; i < fci->pointer_count + aflag; ++i)
{
if (TREE_CODE (cur_type) == POINTER_TYPE)
{
cur_type = TREE_TYPE (cur_type);
+
+ if (cur_param != 0 && TREE_CODE (cur_param) == ADDR_EXPR)
+ cur_param = TREE_OPERAND (cur_param, 0);
+ else
+ cur_param = 0;
+
continue;
}
- sprintf (message,
- "format argument is not a %s (arg %d)",
- ((fci->pointer_count == 1) ? "pointer" : "pointer to a pointer"),
- arg_num);
- warning (message);
+ if (TREE_CODE (cur_type) != ERROR_MARK)
+ warning ("format argument is not a %s (arg %d)",
+ ((fci->pointer_count + aflag == 1)
+ ? "pointer" : "pointer to a pointer"),
+ arg_num);
break;
}
+ /* See if this is an attempt to write into a const type with
+ scanf or with printf "%n". */
+ if ((info->format_type == scanf_format_type
+ || (info->format_type == printf_format_type
+ && format_char == 'n'))
+ && i == fci->pointer_count + aflag
+ && wanted_type != 0
+ && TREE_CODE (cur_type) != ERROR_MARK
+ && (TYPE_READONLY (cur_type)
+ || (cur_param != 0
+ && (TREE_CODE_CLASS (TREE_CODE (cur_param)) == 'c'
+ || (TREE_CODE_CLASS (TREE_CODE (cur_param)) == 'd'
+ && TREE_READONLY (cur_param))))))
+ warning ("writing into constant object (arg %d)", arg_num);
+
/* Check the type of the "real" argument, if there's a type we want. */
- if (i == fci->pointer_count && wanted_type != 0
+ if (i == fci->pointer_count + aflag && wanted_type != 0
+ && TREE_CODE (cur_type) != ERROR_MARK
&& wanted_type != TYPE_MAIN_VARIANT (cur_type)
/* If we want `void *', allow any pointer type.
(Anything else would already have got a warning.) */
{
register char *this;
register char *that;
-
+
this = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (wanted_type)));
that = 0;
if (TREE_CODE (cur_type) != ERROR_MARK
that = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (cur_type)));
if (strcmp (this, that) != 0)
- {
- sprintf (message, "%s format, %s arg (arg %d)",
- this, that, arg_num);
- warning (message);
- }
+ warning ("%s format, %s arg (arg %d)", this, that, arg_num);
}
}
}
&& TREE_OVERFLOW (value))
{
TREE_OVERFLOW (value) = 0;
- warning ("integer overflow in expression");
+ if (skip_evaluation == 0)
+ warning ("integer overflow in expression");
}
else if ((TREE_CODE (value) == REAL_CST
|| (TREE_CODE (value) == COMPLEX_CST
&& TREE_OVERFLOW (value))
{
TREE_OVERFLOW (value) = 0;
- warning ("floating-pointer overflow in expression");
+ if (skip_evaluation == 0)
+ warning ("floating point overflow in expression");
}
}
if (TREE_CODE (operand) == INTEGER_CST
&& TREE_CODE (TREE_TYPE (result)) == INTEGER_TYPE
&& TREE_UNSIGNED (TREE_TYPE (result))
+ && skip_evaluation == 0
&& !int_fits_type_p (operand, TREE_TYPE (result)))
{
if (!int_fits_type_p (operand, signed_type (TREE_TYPE (result))))
&& TYPE_PRECISION (type) == TYPE_PRECISION (TREE_TYPE (expr))))
/* If EXPR fits in the unsigned version of TYPE,
don't warn unless pedantic. */
- if (pedantic
- || TREE_UNSIGNED (type)
- || ! int_fits_type_p (expr, unsigned_type (type)))
+ if ((pedantic
+ || TREE_UNSIGNED (type)
+ || ! int_fits_type_p (expr, unsigned_type (type)))
+ && skip_evaluation == 0)
warning ("overflow in implicit constant conversion");
}
else
if (mode == TYPE_MODE (intDI_type_node))
return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
+ if (mode == TYPE_MODE (intTI_type_node))
+ return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
+
if (mode == TYPE_MODE (float_type_node))
return float_type_node;
binary_op_error (code)
enum tree_code code;
{
- register char *opname = "unknown";
+ register char *opname;
switch (code)
{
case LROTATE_EXPR:
case RROTATE_EXPR:
opname = "rotate"; break;
+ default:
+ opname = "unknown"; break;
}
error ("invalid operands to binary %s", opname);
}
case GE_EXPR:
code = LE_EXPR;
break;
+ default:
+ break;
}
*rescode_ptr = code;
}
primop1 = TYPE_MAX_VALUE (type);
val = 0;
break;
+
+ default:
+ break;
}
type = unsigned_type (type);
}
primop0))))
warning ("unsigned value < 0 is always 0");
value = boolean_false_node;
+ break;
+
+ default:
+ break;
}
if (value != 0)
return real_zerop (expr) ? boolean_false_node : boolean_true_node;
case ADDR_EXPR:
+ /* If we are taking the address of a external decl, it might be zero
+ if it is weak, so we cannot optimize. */
+ if (TREE_CODE_CLASS (TREE_CODE (TREE_OPERAND (expr, 0))) == 'd'
+ && DECL_EXTERNAL (TREE_OPERAND (expr, 0)))
+ break;
+
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 0)))
return build (COMPOUND_EXPR, boolean_type_node,
TREE_OPERAND (expr, 0), boolean_true_node);
truthvalue_conversion (TREE_OPERAND (expr, 0)));
else
return truthvalue_conversion (TREE_OPERAND (expr, 0));
-
+
case COND_EXPR:
/* Distribute the conversion into the arms of a COND_EXPR. */
return fold (build (COND_EXPR, boolean_type_node, TREE_OPERAND (expr, 0),
if (TREE_CODE (TREE_TYPE (expr)) == REFERENCE_TYPE
|| TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == REFERENCE_TYPE)
break;
- /* fall through... */
+ /* fall through... */
case NOP_EXPR:
/* If this is widening the argument, we can ignore it. */
if (TYPE_PRECISION (TREE_TYPE (expr))
if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
&& TREE_CODE (TREE_TYPE (expr)) == REAL_TYPE)
break;
- /* fall through... */
+ /* fall through... */
case BIT_XOR_EXPR:
/* This and MINUS_EXPR can be changed into a comparison of the
two objects. */
if (warn_parentheses && C_EXP_ORIGINAL_CODE (expr) == MODIFY_EXPR)
warning ("suggest parentheses around assignment used as truth value");
break;
+
+ default:
+ break;
}
if (TREE_CODE (TREE_TYPE (expr)) == COMPLEX_TYPE)
return build_binary_op (NE_EXPR, expr, integer_zero_node, 1);
}
\f
+#if USE_CPPLIB
/* Read the rest of a #-directive from input stream FINPUT.
In normal use, the directive name and the white space after it
have already been read, so they won't be included in the result.
The value is a string in a reusable buffer. It remains valid
only until the next time this function is called. */
+unsigned char *yy_cur, *yy_lim;
+
+#define GETC() (yy_cur < yy_lim ? *yy_cur++ : yy_get_token ())
+#define UNGETC(c) ((c), yy_cur--)
+
+int
+yy_get_token ()
+{
+ for (;;)
+ {
+ parse_in.limit = parse_in.token_buffer;
+ cpp_token = cpp_get_token (&parse_in);
+ if (cpp_token == CPP_EOF)
+ return -1;
+ yy_lim = CPP_PWRITTEN (&parse_in);
+ yy_cur = parse_in.token_buffer;
+ if (yy_cur < yy_lim)
+ return *yy_cur++;
+ }
+}
+
+char *
+get_directive_line ()
+{
+ static char *directive_buffer = NULL;
+ static unsigned buffer_length = 0;
+ register char *p;
+ register char *buffer_limit;
+ register int looking_for = 0;
+ register int char_escaped = 0;
+
+ if (buffer_length == 0)
+ {
+ directive_buffer = (char *)xmalloc (128);
+ buffer_length = 128;
+ }
+
+ buffer_limit = &directive_buffer[buffer_length];
+
+ for (p = directive_buffer; ; )
+ {
+ int c;
+
+ /* Make buffer bigger if it is full. */
+ if (p >= buffer_limit)
+ {
+ register unsigned bytes_used = (p - directive_buffer);
+
+ buffer_length *= 2;
+ directive_buffer
+ = (char *)xrealloc (directive_buffer, buffer_length);
+ p = &directive_buffer[bytes_used];
+ buffer_limit = &directive_buffer[buffer_length];
+ }
+
+ c = GETC ();
+
+ /* Discard initial whitespace. */
+ if ((c == ' ' || c == '\t') && p == directive_buffer)
+ continue;
+
+ /* Detect the end of the directive. */
+ if (c == '\n' && looking_for == 0)
+ {
+ UNGETC (c);
+ c = '\0';
+ }
+
+ *p++ = c;
+
+ if (c == 0)
+ return directive_buffer;
+
+ /* Handle string and character constant syntax. */
+ if (looking_for)
+ {
+ if (looking_for == c && !char_escaped)
+ looking_for = 0; /* Found terminator... stop looking. */
+ }
+ else
+ if (c == '\'' || c == '"')
+ looking_for = c; /* Don't stop buffering until we see another
+ another one of these (or an EOF). */
+
+ /* Handle backslash. */
+ char_escaped = (c == '\\' && ! char_escaped);
+ }
+}
+#else
+/* Read the rest of a #-directive from input stream FINPUT.
+ In normal use, the directive name and the white space after it
+ have already been read, so they won't be included in the result.
+ We allow for the fact that the directive line may contain
+ a newline embedded within a character or string literal which forms
+ a part of the directive.
+
+ The value is a string in a reusable buffer. It remains valid
+ only until the next time this function is called.
+
+ The terminating character ('\n' or EOF) is left in FINPUT for the
+ caller to re-read. */
char *
get_directive_line (finput)
continue;
/* Detect the end of the directive. */
- if (c == '\n' && looking_for == 0)
+ if (looking_for == 0
+ && (c == '\n' || c == EOF))
{
ungetc (c, finput);
c = '\0';
else
if (c == '\'' || c == '"')
looking_for = c; /* Don't stop buffering until we see another
- another one of these (or an EOF). */
+ one of these (or an EOF). */
/* Handle backslash. */
char_escaped = (c == '\\' && ! char_escaped);
}
}
+#endif /* !USE_CPPLIB */
\f
/* Make a variant type in the proper way for C/C++, propagating qualifiers
down to the element type of an array. */
int constp, volatilep;
{
if (TREE_CODE (type) == ARRAY_TYPE)
- {
- tree real_main_variant = TYPE_MAIN_VARIANT (type);
-
- push_obstacks (TYPE_OBSTACK (real_main_variant),
- TYPE_OBSTACK (real_main_variant));
- type = build_array_type (c_build_type_variant (TREE_TYPE (type),
- constp, volatilep),
- TYPE_DOMAIN (type));
-
- /* TYPE must be on same obstack as REAL_MAIN_VARIANT. If not,
- make a copy. (TYPE might have come from the hash table and
- REAL_MAIN_VARIANT might be in some function's obstack.) */
-
- if (TYPE_OBSTACK (type) != TYPE_OBSTACK (real_main_variant))
- {
- type = copy_node (type);
- TYPE_POINTER_TO (type) = TYPE_REFERENCE_TO (type) = 0;
- }
-
- TYPE_MAIN_VARIANT (type) = real_main_variant;
- pop_obstacks ();
- }
+ return build_array_type (c_build_type_variant (TREE_TYPE (type),
+ constp, volatilep),
+ TYPE_DOMAIN (type));
return build_type_variant (type, constp, volatilep);
}
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