/* cond.c - conditional assembly pseudo-ops, and .include
- Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1990, 91, 92, 93, 95, 96, 97, 98, 99, 2000
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
#include "as.h"
+#include "macro.h"
#include "obstack.h"
{
char *file;
unsigned int line;
-}; /* file_line */
+};
+
+/* We push one of these structures for each .if, and pop it at the
+ .endif. */
-/* This is what we push and pop. */
struct conditional_frame
- {
- struct file_line if_file_line; /* the source file & line number of the "if" */
- struct file_line else_file_line; /* the source file & line of the "else" */
- struct conditional_frame *previous_cframe;
- int else_seen; /* have we seen an else yet? */
- int ignoring; /* if we are currently ignoring input. */
- int dead_tree; /* if a conditional at a higher level is ignoring input. */
- }; /* conditional_frame */
+{
+ /* The source file & line number of the "if". */
+ struct file_line if_file_line;
+ /* The source file & line of the "else". */
+ struct file_line else_file_line;
+ /* The previous conditional. */
+ struct conditional_frame *previous_cframe;
+ /* Have we seen an else yet? */
+ int else_seen;
+ /* Whether we are currently ignoring input. */
+ int ignoring;
+ /* Whether a conditional at a higher level is ignoring input. */
+ int dead_tree;
+ /* Macro nesting level at which this conditional was created. */
+ int macro_nest;
+};
static void initialize_cframe PARAMS ((struct conditional_frame *cframe));
static char *get_mri_string PARAMS ((int, int *));
int arg;
{
register char *name; /* points to name of symbol */
- register struct symbol *symbolP; /* Points to symbol */
+ register symbolS *symbolP; /* Points to symbol */
struct conditional_frame cframe;
SKIP_WHITESPACE (); /* Leading whitespace is part of operand. */
if (!is_name_beginner (*name))
{
- as_bad ("invalid identifier for \".ifdef\"");
+ as_bad (_("invalid identifier for \".ifdef\""));
obstack_1grow (&cond_obstack, 0);
ignore_rest_of_line ();
}
current_cframe = ((struct conditional_frame *)
obstack_copy (&cond_obstack, &cframe,
sizeof (cframe)));
+
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
demand_empty_rest_of_line ();
} /* if a valid identifyer name */
} /* s_ifdef() */
expressionS operand;
struct conditional_frame cframe;
int t;
+ char *stop = NULL;
+ char stopc;
+
+ if (flag_mri)
+ stop = mri_comment_field (&stopc);
SKIP_WHITESPACE (); /* Leading whitespace is part of operand. */
{
expression (&operand);
if (operand.X_op != O_constant)
- as_bad ("non-constant expression in \".if\" statement");
+ as_bad (_("non-constant expression in \".if\" statement"));
}
switch ((operatorT) arg)
case O_gt: t = operand.X_add_number > 0; break;
default:
abort ();
+ return;
}
/* If the above error is signaled, this will dispatch
current_cframe = ((struct conditional_frame *)
obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ if (flag_mri)
+ mri_comment_end (stop, stopc);
+
demand_empty_rest_of_line ();
} /* s_if() */
s_ifc (arg)
int arg;
{
+ char *stop = NULL;
+ char stopc;
char *s1, *s2;
int len1, len2;
int res;
struct conditional_frame cframe;
+ if (flag_mri)
+ stop = mri_comment_field (&stopc);
+
s1 = get_mri_string (',', &len1);
if (*input_line_pointer != ',')
- as_bad ("bad format for ifc or ifnc");
+ as_bad (_("bad format for ifc or ifnc"));
else
++input_line_pointer;
cframe.ignoring = cframe.dead_tree || ! (res ^ arg);
current_cframe = ((struct conditional_frame *)
obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
+
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ if (flag_mri)
+ mri_comment_end (stop, stopc);
+
+ demand_empty_rest_of_line ();
}
void
-s_endif (arg)
+s_elseif (arg)
int arg;
+{
+ expressionS operand;
+ int t;
+
+ if (current_cframe == NULL)
+ {
+ as_bad (_("\".elseif\" without matching \".if\" - ignored"));
+
+ }
+ else if (current_cframe->else_seen)
+ {
+ as_bad (_("\".elseif\" after \".else\" - ignored"));
+ as_bad_where (current_cframe->else_file_line.file,
+ current_cframe->else_file_line.line,
+ _("here is the previous \"else\""));
+ as_bad_where (current_cframe->if_file_line.file,
+ current_cframe->if_file_line.line,
+ _("here is the previous \"if\""));
+ }
+ else
+ {
+ as_where (¤t_cframe->else_file_line.file,
+ ¤t_cframe->else_file_line.line);
+
+ if (!current_cframe->dead_tree)
+ {
+ current_cframe->ignoring = !current_cframe->ignoring;
+ if (LISTING_SKIP_COND ())
+ {
+ if (! current_cframe->ignoring)
+ listing_list (1);
+ else
+ listing_list (2);
+ }
+ } /* if not a dead tree */
+ } /* if error else do it */
+
+
+ SKIP_WHITESPACE (); /* Leading whitespace is part of operand. */
+
+ if (current_cframe != NULL && current_cframe->ignoring)
+ {
+ operand.X_add_number = 0;
+ while (! is_end_of_line[(unsigned char) *input_line_pointer])
+ ++input_line_pointer;
+ }
+ else
+ {
+ expression (&operand);
+ if (operand.X_op != O_constant)
+ as_bad (_("non-constant expression in \".elseif\" statement"));
+ }
+
+ switch ((operatorT) arg)
+ {
+ case O_eq: t = operand.X_add_number == 0; break;
+ case O_ne: t = operand.X_add_number != 0; break;
+ case O_lt: t = operand.X_add_number < 0; break;
+ case O_le: t = operand.X_add_number <= 0; break;
+ case O_ge: t = operand.X_add_number >= 0; break;
+ case O_gt: t = operand.X_add_number > 0; break;
+ default:
+ abort ();
+ return;
+ }
+
+ current_cframe->ignoring = current_cframe->dead_tree || ! t;
+
+ if (LISTING_SKIP_COND ()
+ && current_cframe->ignoring
+ && (current_cframe->previous_cframe == NULL
+ || ! current_cframe->previous_cframe->ignoring))
+ listing_list (2);
+
+ demand_empty_rest_of_line ();
+}
+
+void
+s_endif (arg)
+ int arg ATTRIBUTE_UNUSED;
{
struct conditional_frame *hold;
if (current_cframe == NULL)
{
- as_bad ("\".endif\" without \".if\"");
+ as_bad (_("\".endif\" without \".if\""));
}
else
{
+ if (LISTING_SKIP_COND ()
+ && current_cframe->ignoring
+ && (current_cframe->previous_cframe == NULL
+ || ! current_cframe->previous_cframe->ignoring))
+ listing_list (1);
+
hold = current_cframe;
current_cframe = current_cframe->previous_cframe;
obstack_free (&cond_obstack, hold);
} /* if one pop too many */
- return;
+ if (flag_mri)
+ {
+ while (! is_end_of_line[(unsigned char) *input_line_pointer])
+ ++input_line_pointer;
+ }
+
+ demand_empty_rest_of_line ();
} /* s_endif() */
void
s_else (arg)
- int arg;
+ int arg ATTRIBUTE_UNUSED;
{
if (current_cframe == NULL)
{
- as_bad (".else without matching .if - ignored");
+ as_bad (_(".else without matching .if - ignored"));
}
else if (current_cframe->else_seen)
{
- as_bad ("duplicate \"else\" - ignored");
+ as_bad (_("duplicate \"else\" - ignored"));
as_bad_where (current_cframe->else_file_line.file,
current_cframe->else_file_line.line,
- "here is the previous \"else\"");
+ _("here is the previous \"else\""));
as_bad_where (current_cframe->if_file_line.file,
current_cframe->if_file_line.line,
- "here is the previous \"if\"");
+ _("here is the previous \"if\""));
}
else
{
if (!current_cframe->dead_tree)
{
current_cframe->ignoring = !current_cframe->ignoring;
+ if (LISTING_SKIP_COND ())
+ {
+ if (! current_cframe->ignoring)
+ listing_list (1);
+ else
+ listing_list (2);
+ }
} /* if not a dead tree */
current_cframe->else_seen = 1;
} /* if error else do it */
- return;
+ if (flag_mri)
+ {
+ while (! is_end_of_line[(unsigned char) *input_line_pointer])
+ ++input_line_pointer;
+ }
+
+ demand_empty_rest_of_line ();
} /* s_else() */
void
s_ifeqs (arg)
int arg;
{
- as_bad ("ifeqs not implemented.");
+ char *s1, *s2;
+ int len1, len2;
+ int res;
+ struct conditional_frame cframe;
+
+ s1 = demand_copy_C_string (&len1);
- return;
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer != ',')
+ {
+ as_bad (_(".ifeqs syntax error"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ ++input_line_pointer;
+
+ s2 = demand_copy_C_string (&len2);
+
+ res = len1 == len2 && strncmp (s1, s2, len1) == 0;
+
+ initialize_cframe (&cframe);
+ cframe.ignoring = cframe.dead_tree || ! (res ^ arg);
+ current_cframe = ((struct conditional_frame *)
+ obstack_copy (&cond_obstack, &cframe, sizeof (cframe)));
+
+ if (LISTING_SKIP_COND ()
+ && cframe.ignoring
+ && (cframe.previous_cframe == NULL
+ || ! cframe.previous_cframe->ignoring))
+ listing_list (2);
+
+ demand_empty_rest_of_line ();
} /* s_ifeqs() */
int
s = input_line_pointer;
- if (flag_mri
-#ifdef NO_PSEUDO_DOT
- || 1
-#endif
- )
+ if (NO_PSEUDO_DOT || flag_m68k_mri)
{
if (s[-1] != '.')
--s;
&cframe->if_file_line.line);
cframe->previous_cframe = current_cframe;
cframe->dead_tree = current_cframe != NULL && current_cframe->ignoring;
+ cframe->macro_nest = macro_nest;
+}
+
+/* Give an error if a conditional is unterminated inside a macro or
+ the assembly as a whole. If NEST is non negative, we are being
+ called because of the end of a macro expansion. If NEST is
+ negative, we are being called at the of the input files. */
+
+void
+cond_finish_check (nest)
+ int nest;
+{
+ if (current_cframe != NULL && current_cframe->macro_nest >= nest)
+ {
+ if (nest >= 0)
+ as_bad (_("end of macro inside conditional"));
+ else
+ as_bad (_("end of file inside conditional"));
+ as_bad_where (current_cframe->if_file_line.file,
+ current_cframe->if_file_line.line,
+ _("here is the start of the unterminated conditional"));
+ if (current_cframe->else_seen)
+ as_bad_where (current_cframe->else_file_line.file,
+ current_cframe->else_file_line.line,
+ _("here is the \"else\" of the unterminated conditional"));
+ }
+}
+
+/* This function is called when we exit out of a macro. We assume
+ that any conditionals which began within the macro are correctly
+ nested, and just pop them off the stack. */
- return;
-} /* initialize_cframe() */
+void
+cond_exit_macro (nest)
+ int nest;
+{
+ while (current_cframe != NULL && current_cframe->macro_nest >= nest)
+ {
+ struct conditional_frame *hold;
-/*
- * Local Variables:
- * fill-column: 131
- * comment-column: 0
- * End:
- */
+ hold = current_cframe;
+ current_cframe = current_cframe->previous_cframe;
+ obstack_free (&cond_obstack, hold);
+ }
+}
/* end of cond.c */
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