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/* Copyright 2009-2014
* Kaz Kylheku <kaz@kylheku.com>
* Vancouver, Canada
* All rights reserved.
*
* Redistribution of this software in source and binary forms, with or without
* modification, is permitted provided that the following two conditions are met.
*
* Use of this software in any manner constitutes agreement with the disclaimer
* which follows the two conditions.
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DAMAGES, HOWEVER CAUSED,
* AND UNDER ANY THEORY OF LIABILITY, ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <assert.h>
#include <limits.h>
#include <dirent.h>
#include <stdlib.h>
#include <stdarg.h>
#include <setjmp.h>
#include <wchar.h>
#include <signal.h>
#include "config.h"
#include "lib.h"
#include "signal.h"
#include "unwind.h"
#include "gc.h"
#include "regex.h"
#include "utf8.h"
#include "match.h"
#include "hash.h"
#include "eval.h"
#include "stream.h"
#include "parser.h"
val parser_s;
static void parser_mark(val obj)
{
parser_t *p = coerce(parser_t *, obj->co.handle);
gc_mark(p->stream);
gc_mark(p->name);
gc_mark(p->prepared_msg);
gc_mark(p->syntax_tree);
}
static struct cobj_ops parser_ops = {
eq,
cobj_print_op,
cobj_destroy_free_op,
parser_mark,
cobj_hash_op,
};
val parser(val stream, val lineno)
{
parser_t *p = coerce(parser_t *, chk_malloc(sizeof *p));
val parser;
p->lineno = 0;
p->errors = 0;
p->stream = nil;
p->name = nil;
p->prepared_msg = nil;
p->syntax_tree = nil;
p->scanner = 0;
parser = cobj(coerce(mem_t *, p), parser_s, &parser_ops);
p->lineno = c_num(default_arg(lineno, one));
p->stream = stream;
return parser;
}
void open_txr_file(val spec_file, val *name, val *stream)
{
{
FILE *in = w_fopen(c_str(spec_file), L"r");
if (in == 0) {
spec_file = cat_str(list(spec_file, lit("txr"), nao), lit("."));
in = w_fopen(c_str(spec_file), L"r");
if (in == 0)
uw_throwf(file_error_s, lit("unable to open ~a"), spec_file, nao);
}
*stream = make_stdio_stream(in, spec_file);
*name = spec_file;
}
}
val regex_parse(val string, val error_stream)
{
uses_or2;
val parse_string = cat_str(list(lit("@\x01R"), string, nao), nil);
val save_stream = std_error;
val stream = make_string_byte_input_stream(parse_string);
parser_t parser;
error_stream = default_bool_arg(error_stream);
std_error = if3(error_stream == t, std_output, or2(error_stream, std_null));
{
int gc = gc_state(0);
val name = if3(std_error != std_null, lit("regex"), lit(""));
parse(stream, name, &parser);
gc_state(gc);
}
std_error = save_stream;
return parser.errors ? nil : parser.syntax_tree;
}
val lisp_parse(val source_in, val error_stream, val error_return_val)
{
uses_or2;
val source = default_bool_arg(source_in);
val input_stream = if3(stringp(source),
make_string_byte_input_stream(source),
or2(source, std_input));
val secret_token_stream = make_string_byte_input_stream(lit("@\x01" "E"));
val name = if3(stringp(source),
lit("string"),
stream_get_prop(input_stream, name_k));
val stream = make_catenated_stream(list(secret_token_stream, input_stream, nao));
val saved_dyn = dyn_env;
parser_t parser;
dyn_env = make_env(nil, nil, dyn_env);
error_stream = default_bool_arg(error_stream);
error_stream = if3(error_stream == t, std_output, or2(error_stream, std_null));
class_check (error_stream, stream_s);
env_vbind(dyn_env, stderr_s, error_stream);
{
int gc = gc_state(0);
name = if3(std_error != std_null, name, lit(""));
parse(stream, name, &parser);
gc_state(gc);
}
dyn_env = saved_dyn;
if (parser.errors) {
if (missingp(error_return_val))
uw_throwf(syntax_error_s, lit("read: syntax error"), nao);
return error_return_val;
}
return parser.syntax_tree;
}
void parse_init(void)
{
parser_s = intern(lit("parser"), user_package);
parser_l_init();
}
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