Merge branch 'pfalcon-modure'

Author: dpgeorge

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