/* CPP Library. (Directive handling.)
Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2007 Free Software Foundation, Inc.
+ 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Per Bothner, 1994-95.
Based on CCCP program by Paul Rubin, June 1986
Adapted to ANSI C, Richard Stallman, Jan 1987
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, or (at your option) any
+Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+along with this program; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
struct if_stack
{
struct if_stack *next;
- unsigned int line; /* Line where condition started. */
+ linenum_type line; /* Line where condition started. */
const cpp_hashnode *mi_cmacro;/* macro name for #ifndef around entire file */
bool skip_elses; /* Can future #else / #elif be skipped? */
bool was_skipping; /* If were skipping on entry. */
#define INCL (1 << 2)
#define IN_I (1 << 3)
#define EXPAND (1 << 4)
+#define DEPRECATED (1 << 5)
/* Defines one #-directive, including how to handle it. */
typedef void (*directive_handler) (cpp_reader *);
/* Forward declarations. */
static void skip_rest_of_line (cpp_reader *);
-static void check_eol (cpp_reader *);
+static void check_eol (cpp_reader *, bool);
static void start_directive (cpp_reader *);
static void prepare_directive_trad (cpp_reader *);
static void end_directive (cpp_reader *, int);
static const char *parse_include (cpp_reader *, int *, const cpp_token ***);
static void push_conditional (cpp_reader *, int, int, const cpp_hashnode *);
static unsigned int read_flag (cpp_reader *, unsigned int);
-static int strtoul_for_line (const uchar *, unsigned int, unsigned long *);
+static bool strtolinenum (const uchar *, size_t, linenum_type *, bool *);
static void do_diagnostic (cpp_reader *, int, int);
static cpp_hashnode *lex_macro_node (cpp_reader *, bool);
static int undefine_macros (cpp_reader *, cpp_hashnode *, void *);
counts from all the source code I have lying around (egcs and libc
CVS as of 1999-05-18, plus grub-0.5.91, linux-2.2.9, and
pcmcia-cs-3.0.9). This is no longer important as directive lookup
- is now O(1). All extensions other than #warning and #include_next
- are deprecated. The name is where the extension appears to have
- come from. */
+ is now O(1). All extensions other than #warning, #include_next,
+ and #import are deprecated. The name is where the extension
+ appears to have come from. */
#define DIRECTIVE_TABLE \
D(define, T_DEFINE = 0, KANDR, IN_I) /* 270554 */ \
D(pragma, T_PRAGMA, STDC89, IN_I) /* 195 */ \
D(warning, T_WARNING, EXTENSION, 0) /* 22 */ \
D(include_next, T_INCLUDE_NEXT, EXTENSION, INCL | EXPAND) /* 19 */ \
-D(ident, T_IDENT, EXTENSION, IN_I) /* 11 */ \
+D(ident, T_IDENT, EXTENSION, IN_I | DEPRECATED) /* 11 */ \
D(import, T_IMPORT, EXTENSION, INCL | EXPAND) /* 0 ObjC */ \
-D(assert, T_ASSERT, EXTENSION, 0) /* 0 SVR4 */ \
-D(unassert, T_UNASSERT, EXTENSION, 0) /* 0 SVR4 */ \
-D(sccs, T_SCCS, EXTENSION, IN_I) /* 0 SVR4? */
+D(assert, T_ASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \
+D(unassert, T_UNASSERT, EXTENSION, DEPRECATED) /* 0 SVR4 */ \
+D(sccs, T_SCCS, EXTENSION, IN_I | DEPRECATED) /* 0 SVR4? */
/* #sccs is synonymous with #ident. */
#define do_sccs do_ident
did use this notation in its preprocessed output. */
static const directive linemarker_dir =
{
- do_linemarker, U"#", 1, KANDR, IN_I
+ do_linemarker, UC"#", 1, KANDR, IN_I
};
#define SEEN_EOL() (pfile->cur_token[-1].type == CPP_EOF)
;
}
-/* Ensure there are no stray tokens at the end of a directive. */
+/* Ensure there are no stray tokens at the end of a directive. If
+ EXPAND is true, tokens macro-expanding to nothing are allowed. */
static void
-check_eol (cpp_reader *pfile)
+check_eol (cpp_reader *pfile, bool expand)
{
- if (! SEEN_EOL () && _cpp_lex_token (pfile)->type != CPP_EOF)
+ if (! SEEN_EOL () && (expand
+ ? cpp_get_token (pfile)
+ : _cpp_lex_token (pfile))->type != CPP_EOF)
cpp_error (pfile, CPP_DL_PEDWARN, "extra tokens at end of #%s directive",
pfile->directive->name);
}
static void
directive_diagnostics (cpp_reader *pfile, const directive *dir, int indented)
{
- /* Issue -pedantic warnings for extensions. */
- if (CPP_PEDANTIC (pfile)
- && ! pfile->state.skipping
- && dir->origin == EXTENSION)
- cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name);
+ /* Issue -pedantic or deprecated warnings for extensions. We let
+ -pedantic take precedence if both are applicable. */
+ if (! pfile->state.skipping)
+ {
+ if (dir->origin == EXTENSION
+ && !(dir == &dtable[T_IMPORT] && CPP_OPTION (pfile, objc))
+ && CPP_PEDANTIC (pfile))
+ cpp_error (pfile, CPP_DL_PEDWARN, "#%s is a GCC extension", dir->name);
+ else if (((dir->flags & DEPRECATED) != 0
+ || (dir == &dtable[T_IMPORT] && !CPP_OPTION (pfile, objc)))
+ && CPP_OPTION (pfile, warn_deprecated))
+ cpp_error (pfile, CPP_DL_WARNING, "#%s is a deprecated GCC extension",
+ dir->name);
+ }
/* Traditionally, a directive is ignored unless its # is in
column 1. Therefore in code intended to work with K+R
does not cause '#define foo bar' to get executed when
compiled with -save-temps, we recognize directives in
-fpreprocessed mode only if the # is in column 1. macro.c
- puts a space in front of any '#' at the start of a macro. */
+ puts a space in front of any '#' at the start of a macro.
+
+ We exclude the -fdirectives-only case because macro expansion
+ has not been performed yet, and block comments can cause spaces
+ to preceed the directive. */
if (CPP_OPTION (pfile, preprocessed)
+ && !CPP_OPTION (pfile, directives_only)
&& (indented || !(dir->flags & IN_I)))
{
skip = 0;
_cpp_backup_tokens (pfile, 1);
end_directive (pfile, skip);
- if (was_parsing_args)
+ if (was_parsing_args && !pfile->state.in_deferred_pragma)
{
/* Restore state when within macro args. */
pfile->state.parsing_args = 2;
pfile->state.save_comments =
! CPP_OPTION (pfile, discard_comments_in_macro_exp);
+ if (pfile->cb.before_define)
+ pfile->cb.before_define (pfile);
+
if (_cpp_create_definition (pfile, node))
if (pfile->cb.define)
pfile->cb.define (pfile, pfile->directive_line, node);
+
+ node->flags &= ~NODE_USED;
}
}
if (node)
{
+ if (pfile->cb.before_define)
+ pfile->cb.before_define (pfile);
+
if (pfile->cb.undef)
pfile->cb.undef (pfile, pfile->directive_line, node);
}
}
- check_eol (pfile);
+ check_eol (pfile, false);
}
/* Undefine a single macro/assertion/whatever. */
/* Body of _cpp_free_definition inlined here for speed.
Macros and assertions no longer have anything to free. */
h->type = NT_VOID;
- h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED);
+ h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED|NODE_USED);
return 1;
}
const unsigned char *dir;
if (pfile->directive == &dtable[T_PRAGMA])
- dir = U"pragma dependency";
+ dir = UC"pragma dependency";
else
dir = pfile->directive->name;
cpp_error (pfile, CPP_DL_ERROR, "#%s expects \"FILENAME\" or <FILENAME>",
return NULL;
}
- if (buf == NULL || CPP_OPTION (pfile, discard_comments))
- check_eol (pfile);
+ if (pfile->directive == &dtable[T_PRAGMA])
+ {
+ /* This pragma allows extra tokens after the file name. */
+ }
+ else if (buf == NULL || CPP_OPTION (pfile, discard_comments))
+ check_eol (pfile, true);
else
{
/* If we are not discarding comments, then gather them while
}
/* Subroutine of do_line and do_linemarker. Convert a number in STR,
- of length LEN, to binary; store it in NUMP, and return 0 if the
- number was well-formed, 1 if not. Temporary, hopefully. */
-static int
-strtoul_for_line (const uchar *str, unsigned int len, long unsigned int *nump)
+ of length LEN, to binary; store it in NUMP, and return false if the
+ number was well-formed, true if not. WRAPPED is set to true if the
+ number did not fit into 'unsigned long'. */
+static bool
+strtolinenum (const uchar *str, size_t len, linenum_type *nump, bool *wrapped)
{
- unsigned long reg = 0;
+ linenum_type reg = 0;
+ linenum_type reg_prev = 0;
+
uchar c;
+ *wrapped = false;
while (len--)
{
c = *str++;
if (!ISDIGIT (c))
- return 1;
+ return true;
reg *= 10;
reg += c - '0';
+ if (reg < reg_prev)
+ *wrapped = true;
+ reg_prev = reg;
}
*nump = reg;
- return 0;
+ return false;
}
/* Interpret #line command.
unsigned char map_sysp = map->sysp;
const cpp_token *token;
const char *new_file = map->to_file;
- unsigned long new_lineno;
+ linenum_type new_lineno;
/* C99 raised the minimum limit on #line numbers. */
- unsigned int cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767;
+ linenum_type cap = CPP_OPTION (pfile, c99) ? 2147483647 : 32767;
+ bool wrapped;
/* #line commands expand macros. */
token = cpp_get_token (pfile);
if (token->type != CPP_NUMBER
- || strtoul_for_line (token->val.str.text, token->val.str.len,
- &new_lineno))
+ || strtolinenum (token->val.str.text, token->val.str.len,
+ &new_lineno, &wrapped))
{
- cpp_error (pfile, CPP_DL_ERROR,
- "\"%s\" after #line is not a positive integer",
- cpp_token_as_text (pfile, token));
+ if (token->type == CPP_EOF)
+ cpp_error (pfile, CPP_DL_ERROR, "unexpected end of file after #line");
+ else
+ cpp_error (pfile, CPP_DL_ERROR,
+ "\"%s\" after #line is not a positive integer",
+ cpp_token_as_text (pfile, token));
return;
}
- if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap))
+ if (CPP_PEDANTIC (pfile) && (new_lineno == 0 || new_lineno > cap || wrapped))
cpp_error (pfile, CPP_DL_PEDWARN, "line number out of range");
+ else if (wrapped)
+ cpp_error (pfile, CPP_DL_WARNING, "line number out of range");
token = cpp_get_token (pfile);
if (token->type == CPP_STRING)
if (cpp_interpret_string_notranslate (pfile, &token->val.str, 1,
&s, false))
new_file = (const char *)s.text;
- check_eol (pfile);
+ check_eol (pfile, true);
}
else if (token->type != CPP_EOF)
{
}
skip_rest_of_line (pfile);
- _cpp_do_file_change (pfile, LC_RENAME, new_file, new_lineno,
+ _cpp_do_file_change (pfile, LC_RENAME_VERBATIM, new_file, new_lineno,
map_sysp);
}
const struct line_map *map = &line_table->maps[line_table->used - 1];
const cpp_token *token;
const char *new_file = map->to_file;
- unsigned long new_lineno;
+ linenum_type new_lineno;
unsigned int new_sysp = map->sysp;
- enum lc_reason reason = LC_RENAME;
+ enum lc_reason reason = LC_RENAME_VERBATIM;
int flag;
+ bool wrapped;
/* Back up so we can get the number again. Putting this in
_cpp_handle_directive risks two calls to _cpp_backup_tokens in
/* #line commands expand macros. */
token = cpp_get_token (pfile);
if (token->type != CPP_NUMBER
- || strtoul_for_line (token->val.str.text, token->val.str.len,
- &new_lineno))
+ || strtolinenum (token->val.str.text, token->val.str.len,
+ &new_lineno, &wrapped))
{
+ /* Unlike #line, there does not seem to be a way to get an EOF
+ here. So, it should be safe to always spell the token. */
cpp_error (pfile, CPP_DL_ERROR,
"\"%s\" after # is not a positive integer",
cpp_token_as_text (pfile, token));
}
pfile->buffer->sysp = new_sysp;
- check_eol (pfile);
+ check_eol (pfile, false);
}
else if (token->type != CPP_EOF)
{
and zero otherwise. */
void
_cpp_do_file_change (cpp_reader *pfile, enum lc_reason reason,
- const char *to_file, unsigned int file_line,
+ const char *to_file, linenum_type file_line,
unsigned int sysp)
{
const struct line_map *map = linemap_add (pfile->line_table, reason, sysp,
static void
do_diagnostic (cpp_reader *pfile, int code, int print_dir)
{
- if (_cpp_begin_message (pfile, code, pfile->cur_token[-1].src_loc, 0))
- {
- if (print_dir)
- fprintf (stderr, "#%s ", pfile->directive->name);
- pfile->state.prevent_expansion++;
- cpp_output_line (pfile, stderr);
- pfile->state.prevent_expansion--;
- }
+ const unsigned char *dir_name;
+ unsigned char *line;
+ source_location src_loc = pfile->cur_token[-1].src_loc;
+
+ if (print_dir)
+ dir_name = pfile->directive->name;
+ else
+ dir_name = NULL;
+ pfile->state.prevent_expansion++;
+ line = cpp_output_line_to_string (pfile, dir_name);
+ pfile->state.prevent_expansion--;
+
+ cpp_error_with_line (pfile, code, src_loc, 0, "%s", line);
+ free (line);
}
static void
else if (pfile->cb.ident)
pfile->cb.ident (pfile, pfile->directive_line, &str->val.str);
- check_eol (pfile);
+ check_eol (pfile, false);
}
/* Lookup a PRAGMA name in a singly-linked CHAIN. Returns the
if (space)
{
- node = cpp_lookup (pfile, U space, strlen (space));
+ node = cpp_lookup (pfile, UC space, strlen (space));
entry = lookup_pragma_entry (*chain, node);
if (!entry)
{
}
/* Check for duplicates. */
- node = cpp_lookup (pfile, U name, strlen (name));
+ node = cpp_lookup (pfile, UC name, strlen (name));
entry = lookup_pragma_entry (*chain, node);
if (entry == NULL)
{
{
if (pe->is_nspace)
sd = restore_registered_pragmas (pfile, pe->u.space, sd);
- pe->pragma = cpp_lookup (pfile, U *sd, strlen (*sd));
+ pe->pragma = cpp_lookup (pfile, UC *sd, strlen (*sd));
free (*sd);
sd++;
}
if (cpp_in_primary_file (pfile))
cpp_error (pfile, CPP_DL_WARNING, "#pragma once in main file");
- check_eol (pfile);
+ check_eol (pfile, false);
_cpp_mark_file_once_only (pfile, pfile->buffer->file);
}
"#pragma system_header ignored outside include file");
else
{
- check_eol (pfile);
+ check_eol (pfile, false);
skip_rest_of_line (pfile);
cpp_make_system_header (pfile, 1, 0);
}
get__Pragma_string (cpp_reader *pfile)
{
const cpp_token *string;
+ const cpp_token *paren;
- if (get_token_no_padding (pfile)->type != CPP_OPEN_PAREN)
+ paren = get_token_no_padding (pfile);
+ if (paren->type == CPP_EOF)
+ _cpp_backup_tokens (pfile, 1);
+ if (paren->type != CPP_OPEN_PAREN)
return NULL;
string = get_token_no_padding (pfile);
- if (string->type != CPP_STRING && string->type != CPP_WSTRING)
+ if (string->type == CPP_EOF)
+ _cpp_backup_tokens (pfile, 1);
+ if (string->type != CPP_STRING && string->type != CPP_WSTRING
+ && string->type != CPP_STRING32 && string->type != CPP_STRING16)
return NULL;
- if (get_token_no_padding (pfile)->type != CPP_CLOSE_PAREN)
+ paren = get_token_no_padding (pfile);
+ if (paren->type == CPP_EOF)
+ _cpp_backup_tokens (pfile, 1);
+ if (paren->type != CPP_CLOSE_PAREN)
return NULL;
return string;
tokenrun *saved_cur_run;
cpp_token *toks;
int count;
+ const struct directive *save_directive;
dest = result = (char *) alloca (in->len - 1);
src = in->text + 1 + (in->text[0] == 'L');
start_directive (pfile);
_cpp_clean_line (pfile);
+ save_directive = pfile->directive;
+ pfile->directive = &dtable[T_PRAGMA];
do_pragma (pfile);
end_directive (pfile, 1);
+ pfile->directive = save_directive;
/* We always insert at least one token, the directive result. It'll
either be a CPP_PADDING or a CPP_PRAGMA. In the later case, we
_cpp_push_token_context (pfile, NULL, toks, count);
}
-/* Handle the _Pragma operator. */
-void
+/* Handle the _Pragma operator. Return 0 on error, 1 if ok. */
+int
_cpp_do__Pragma (cpp_reader *pfile)
{
const cpp_token *string = get__Pragma_string (pfile);
pfile->directive_result.type = CPP_PADDING;
if (string)
- destringize_and_run (pfile, &string->val.str);
- else
- cpp_error (pfile, CPP_DL_ERROR,
- "_Pragma takes a parenthesized string literal");
+ {
+ destringize_and_run (pfile, &string->val.str);
+ return 1;
+ }
+ cpp_error (pfile, CPP_DL_ERROR,
+ "_Pragma takes a parenthesized string literal");
+ return 0;
}
/* Handle #ifdef. */
if (! pfile->state.skipping)
{
- const cpp_hashnode *node = lex_macro_node (pfile, false);
+ cpp_hashnode *node = lex_macro_node (pfile, false);
if (node)
{
skip = node->type != NT_MACRO;
_cpp_mark_macro_used (node);
- check_eol (pfile);
+ if (!(node->flags & NODE_USED))
+ {
+ node->flags |= NODE_USED;
+ if (node->type == NT_MACRO)
+ {
+ if (pfile->cb.used_define)
+ pfile->cb.used_define (pfile, pfile->directive_line, node);
+ }
+ else
+ {
+ if (pfile->cb.used_undef)
+ pfile->cb.used_undef (pfile, pfile->directive_line, node);
+ }
+ }
+ check_eol (pfile, false);
}
}
do_ifndef (cpp_reader *pfile)
{
int skip = 1;
- const cpp_hashnode *node = 0;
+ cpp_hashnode *node = 0;
if (! pfile->state.skipping)
{
{
skip = node->type == NT_MACRO;
_cpp_mark_macro_used (node);
- check_eol (pfile);
+ if (!(node->flags & NODE_USED))
+ {
+ node->flags |= NODE_USED;
+ if (node->type == NT_MACRO)
+ {
+ if (pfile->cb.used_define)
+ pfile->cb.used_define (pfile, pfile->directive_line, node);
+ }
+ else
+ {
+ if (pfile->cb.used_undef)
+ pfile->cb.used_undef (pfile, pfile->directive_line, node);
+ }
+ }
+ check_eol (pfile, false);
}
}
int skip = 1;
if (! pfile->state.skipping)
- skip = _cpp_parse_expr (pfile) == false;
+ skip = _cpp_parse_expr (pfile, true) == false;
push_conditional (pfile, skip, T_IF, pfile->mi_ind_cmacro);
}
/* Only check EOL if was not originally skipping. */
if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels))
- check_eol (pfile);
+ check_eol (pfile, false);
}
}
}
ifs->type = T_ELIF;
- /* Only evaluate this if we aren't skipping elses. During
- evaluation, set skipping to false to get lexer warnings. */
- if (ifs->skip_elses)
- pfile->state.skipping = 1;
- else
+ if (! ifs->was_skipping)
{
+ bool value;
+ /* The standard mandates that the expression be parsed even
+ if we are skipping elses at this point -- the lexical
+ restrictions on #elif only apply to skipped groups, but
+ this group is not being skipped. Temporarily set
+ skipping to false to get lexer warnings. */
pfile->state.skipping = 0;
- pfile->state.skipping = ! _cpp_parse_expr (pfile);
- ifs->skip_elses = ! pfile->state.skipping;
+ value = _cpp_parse_expr (pfile, false);
+ if (ifs->skip_elses)
+ pfile->state.skipping = 1;
+ else
+ {
+ pfile->state.skipping = ! value;
+ ifs->skip_elses = value;
+ }
}
/* Invalidate any controlling macro. */
{
/* Only check EOL if was not originally skipping. */
if (!ifs->was_skipping && CPP_OPTION (pfile, warn_endif_labels))
- check_eol (pfile);
+ check_eol (pfile, false);
/* If potential control macro, we go back outside again. */
if (ifs->next == 0 && ifs->mi_cmacro)
node->type = NT_ASSERTION;
node->value.answers = new_answer;
- check_eol (pfile);
+ check_eol (pfile, false);
}
}
if (node->value.answers == 0)
node->type = NT_VOID;
- check_eol (pfile);
+ check_eol (pfile, false);
}
else
_cpp_free_definition (node);
run_directive (pfile, T_DEFINE, buf, count);
}
+
+/* Use to build macros to be run through cpp_define() as
+ described above.
+ Example: cpp_define_formatted (pfile, "MACRO=%d", value); */
+
+void
+cpp_define_formatted (cpp_reader *pfile, const char *fmt, ...)
+{
+ char *ptr = NULL;
+
+ va_list ap;
+ va_start (ap, fmt);
+ vasprintf (&ptr, fmt, ap);
+ va_end (ap);
+
+ cpp_define (pfile, ptr);
+ free (ptr);
+}
+
+
/* Slight variant of the above for use by initialize_builtins. */
void
_cpp_define_builtin (cpp_reader *pfile, const char *str)
if (node == NULL)
return;
+ if (pfile->cb.before_define)
+ pfile->cb.before_define (pfile);
+
if (node->type == NT_MACRO)
{
if (pfile->cb.undef)
run_directive (pfile, type, str, count);
}
-/* The number of errors for a given reader. */
-unsigned int
-cpp_errors (cpp_reader *pfile)
-{
- return pfile->errors;
-}
-
/* The options structure. */
cpp_options *
cpp_get_options (cpp_reader *pfile)
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