diff options
author | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2014-09-12 18:48:07 +0300 |
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committer | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2014-10-11 14:36:32 +0300 |
commit | c71e045165bffbbe085e407008feba3cdfda3298 (patch) | |
tree | 9ad616078a10cac425ecff7dfdd1922f1680ab46 /extmod/modure.c | |
parent | 9b6617ea8b2324993e709058dd1a74433a9001a6 (diff) |
modure: Initial module, using re1.5 (which is based on re1 codebase).
https://github.com/pfalcon/re1.5
Diffstat (limited to 'extmod/modure.c')
-rw-r--r-- | extmod/modure.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/extmod/modure.c b/extmod/modure.c new file mode 100644 index 000000000..b6560599a --- /dev/null +++ b/extmod/modure.c @@ -0,0 +1,241 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2014 Paul Sokolovsky + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <stdio.h> +#include <assert.h> +#include <string.h> + +#include "mpconfig.h" +#include "nlr.h" +#include "misc.h" +#include "qstr.h" +#include "obj.h" +#include "runtime.h" +#include "binary.h" + +#if MICROPY_PY_URE + +#include "re1.5/regexp.h" + +#define FLAG_DEBUG 0x1000 + +typedef struct _mp_obj_re_t { + mp_obj_base_t base; + ByteProg re; +} mp_obj_re_t; + +typedef struct _mp_obj_match_t { + mp_obj_base_t base; + int num_matches; + mp_obj_t str; + const char *caps[0]; +} mp_obj_match_t; + + +STATIC void match_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) { + mp_obj_match_t *self = self_in; + print(env, "<match num=%d @%p>", self->num_matches); +} + +STATIC mp_obj_t match_group(mp_obj_t self_in, mp_obj_t no_in) { + mp_obj_match_t *self = self_in; + mp_int_t no = mp_obj_int_get(no_in); + if (no < 0 || no >= self->num_matches / 2) { + nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, no_in)); + } + + const char *start = self->caps[no * 2]; + return mp_obj_new_str(start, self->caps[no * 2 + 1] - start, false); +} +MP_DEFINE_CONST_FUN_OBJ_2(match_group_obj, match_group); + +STATIC const mp_map_elem_t match_locals_dict_table[] = { + { MP_OBJ_NEW_QSTR(MP_QSTR_group), (mp_obj_t) &match_group_obj }, +}; + +STATIC MP_DEFINE_CONST_DICT(match_locals_dict, match_locals_dict_table); + +STATIC const mp_obj_type_t match_type = { + { &mp_type_type }, + .name = MP_QSTR_match, + .print = match_print, + .locals_dict = (mp_obj_t)&match_locals_dict, +}; + +STATIC void re_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) { + mp_obj_re_t *self = self_in; + print(env, "<re %p>", self); +} + +STATIC mp_obj_t re_exec(bool is_anchored, uint n_args, const mp_obj_t *args) { + mp_obj_re_t *self = args[0]; + Subject subj; + mp_uint_t len; + subj.begin = mp_obj_str_get_data(args[1], &len); + subj.end = subj.begin + len; + int caps_num = (self->re.sub + 1) * 2; + mp_obj_match_t *match = m_new_obj_var(mp_obj_match_t, char*, caps_num); + int res = re1_5_recursiveloopprog(&self->re, &subj, match->caps, caps_num, is_anchored); + if (res == 0) { + m_del_var(mp_obj_match_t, char*, caps_num, match); + return mp_const_none; + } + + match->base.type = &match_type; + match->num_matches = caps_num; + match->str = args[1]; + return match; +} + +STATIC mp_obj_t re_match(uint n_args, const mp_obj_t *args) { + return re_exec(true, n_args, args); +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_match_obj, 2, 4, re_match); + +STATIC mp_obj_t re_search(uint n_args, const mp_obj_t *args) { + return re_exec(false, n_args, args); +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_search_obj, 2, 4, re_search); + +STATIC mp_obj_t re_split(uint n_args, const mp_obj_t *args) { + mp_obj_re_t *self = args[0]; + Subject subj; + mp_uint_t len; + subj.begin = mp_obj_str_get_data(args[1], &len); + subj.end = subj.begin + len; + int caps_num = (self->re.sub + 1) * 2; + + int maxsplit = 0; + if (n_args > 2) { + maxsplit = mp_obj_int_get(args[2]); + } + + mp_obj_t retval = mp_obj_new_list(0, NULL); + const char *caps[caps_num]; + while (true) { + int res = re1_5_recursiveloopprog(&self->re, &subj, caps, caps_num, false); + + // if we didn't have a match, or had an empty match, it's time to stop + if (!res || caps[0] == caps[1]) { + break; + } + + mp_obj_t s = mp_obj_new_str(subj.begin, caps[0] - subj.begin, false); + mp_obj_list_append(retval, s); + if (self->re.sub > 0) { + mp_not_implemented("Splitting with sub-captures"); + } + subj.begin = caps[1]; + if (maxsplit > 0 && --maxsplit == 0) { + break; + } + } + + mp_obj_t s = mp_obj_new_str(subj.begin, subj.end - subj.begin, false); + mp_obj_list_append(retval, s); + return retval; +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_split_obj, 2, 3, re_split); + +STATIC const mp_map_elem_t re_locals_dict_table[] = { + { MP_OBJ_NEW_QSTR(MP_QSTR_match), (mp_obj_t) &re_match_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_search), (mp_obj_t) &re_search_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_split), (mp_obj_t) &re_split_obj }, +}; + +STATIC MP_DEFINE_CONST_DICT(re_locals_dict, re_locals_dict_table); + +STATIC const mp_obj_type_t re_type = { + { &mp_type_type }, + .name = MP_QSTR_ure, + .print = re_print, + .locals_dict = (mp_obj_t)&re_locals_dict, +}; + +mp_obj_t mod_re_compile(uint n_args, const mp_obj_t *args) { + const char *re_str = mp_obj_str_get_str(args[0]); + int size = re1_5_sizecode(re_str); + mp_obj_re_t *o = m_new_obj_var(mp_obj_re_t, char, size); + o->base.type = &re_type; + int flags = 0; + if (n_args > 1) { + flags = mp_obj_get_int(args[1]); + } + int error = re1_5_compilecode(&o->re, re_str); + if (error != 0) { + nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Error in regex")); + } + if (flags & FLAG_DEBUG) { + re1_5_dumpcode(&o->re); + } + return o; +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_compile_obj, 1, 2, mod_re_compile); + +STATIC mp_obj_t mod_re_exec(bool is_anchored, uint n_args, const mp_obj_t *args) { + mp_obj_re_t *self = mod_re_compile(1, args); + + const mp_obj_t args2[] = {self, args[1]}; + mp_obj_match_t *match = re_exec(is_anchored, 2, args2); + return match; +} + +STATIC mp_obj_t mod_re_match(uint n_args, const mp_obj_t *args) { + return mod_re_exec(true, n_args, args); +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_match_obj, 2, 4, mod_re_match); + +STATIC mp_obj_t mod_re_search(uint n_args, const mp_obj_t *args) { + return mod_re_exec(false, n_args, args); +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_search_obj, 2, 4, mod_re_search); + +STATIC const mp_map_elem_t mp_module_re_globals_table[] = { + { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_ure) }, + { MP_OBJ_NEW_QSTR(MP_QSTR_compile), (mp_obj_t)&mod_re_compile_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_match), (mp_obj_t)&mod_re_match_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_search), (mp_obj_t)&mod_re_search_obj }, + { MP_OBJ_NEW_QSTR(MP_QSTR_DEBUG), MP_OBJ_NEW_SMALL_INT(FLAG_DEBUG) }, +}; + +STATIC const mp_obj_dict_t mp_module_re_globals = { + .base = {&mp_type_dict}, + .map = { + .all_keys_are_qstrs = 1, + .table_is_fixed_array = 1, + .used = MP_ARRAY_SIZE(mp_module_re_globals_table), + .alloc = MP_ARRAY_SIZE(mp_module_re_globals_table), + .table = (mp_map_elem_t*)mp_module_re_globals_table, + }, +}; + +const mp_obj_module_t mp_module_ure = { + .base = { &mp_type_module }, + .name = MP_QSTR_ure, + .globals = (mp_obj_dict_t*)&mp_module_re_globals, +}; + +#endif //MICROPY_PY_URE |