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/* GNU m4 -- A simple macro processor
Copyright (C) 1989-1994, 2001, 2004, 2006-2008, 2010, 2013-2014 Free
Software Foundation, Inc.
This file is part of GNU M4.
GNU M4 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 3 of the License, or
(at your option) any later version.
GNU M4 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "bitrotate.h"
#include "m4private.h"
#define DEFAULT_NESTING_LIMIT 1024
#define DEFAULT_NAMEMAP_SIZE 61
static size_t
hashfn (const void *ptr)
{
const char *s = (const char *) ptr;
size_t val = DEFAULT_NAMEMAP_SIZE;
while (*s)
val = rotl_sz (val, 7) + to_uchar (*s++);
return val;
}
m4 *
m4_create (void)
{
m4 *context = (m4 *) xzalloc (sizeof *context);
context->symtab = m4_symtab_create (0);
context->syntax = m4_syntax_create ();
context->namemap =
m4_hash_new (DEFAULT_NAMEMAP_SIZE, hashfn, (m4_hash_cmp_func *) strcmp);
context->debug_file = stderr;
obstack_init (&context->trace_messages);
context->nesting_limit = DEFAULT_NESTING_LIMIT;
context->debug_level = M4_DEBUG_TRACE_INITIAL;
context->max_debug_arg_length = SIZE_MAX;
context->search_path =
(m4__search_path_info *) xzalloc (sizeof *context->search_path);
m4__include_init (context);
return context;
}
void
m4_delete (m4 *context)
{
size_t i;
assert (context);
if (context->symtab)
m4_symtab_delete (context->symtab);
if (context->syntax)
m4_syntax_delete (context->syntax);
/* debug_file should have been reset to stdout or stderr, both of
which are closed later. */
assert (context->debug_file == stderr || context->debug_file == stdout);
obstack_free (&context->trace_messages, NULL);
if (context->search_path)
{
m4__search_path *path = context->search_path->list;
while (path)
{
m4__search_path *stale = path;
path = path->next;
DELETE (stale->dir); /* Cast away const. */
free (stale);
}
free (context->search_path);
}
for (i = 0; i < context->stacks_count; i++)
{
assert (context->arg_stacks[i].refcount == 0
&& context->arg_stacks[i].argcount == 0);
if (context->arg_stacks[i].args)
{
obstack_free (context->arg_stacks[i].args, NULL);
free (context->arg_stacks[i].args);
obstack_free (context->arg_stacks[i].argv, NULL);
free (context->arg_stacks[i].argv);
}
}
free (context->arg_stacks);
free (context);
}
/* Use the preprocessor to generate the repetitive bit twiddling functions
for us. Note the additional paretheses around the expanded function
name to protect against macro expansion from the fast macros used to
replace these functions when NDEBUG is defined. */
#define M4FIELD(type, base, field) \
type (CONC(m4_get_, base)) (m4 *context) \
{ \
assert (context); \
return context->field; \
}
m4_context_field_table
#undef M4FIELD
#define M4FIELD(type, base, field) \
type (CONC(m4_set_, base)) (m4 *context, type value) \
{ \
assert (context); \
return context->field = value; \
}
m4_context_field_table
#undef M4FIELD
#define M4OPT_BIT(bit, base) \
bool (CONC(m4_get_, base)) (m4 *context) \
{ \
assert (context); \
return BIT_TEST (context->opt_flags, (bit)); \
}
m4_context_opt_bit_table
#undef M4OPT_BIT
#define M4OPT_BIT(bit, base) \
bool (CONC(m4_set_, base)) (m4 *context, bool value) \
{ \
assert (context); \
if (value) \
BIT_SET (context->opt_flags, (bit)); \
else \
BIT_RESET (context->opt_flags, (bit)); \
return value; \
}
m4_context_opt_bit_table
#undef M4OPT_BIT
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