Merge branch 'pfalcon-modure'

extmod/modure.c

+/*
+ * 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

extmod/re1.5/compilecode.c

+// Copyright 2014 Paul Sokolovsky.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "regexp.h"
+
+static void insert_code(char *code, int at, int num, int *pc)
+{
+    memmove(code + at + num, code + at, *pc - at);
+    *pc += num;
+}
+
+#define REL(at, to) (to - at - 2)
+
+int re1_5_sizecode(const char *re)
+{
+    int pc = 5 + NON_ANCHORED_PREFIX; // Save 0, Save 1, Match; more bytes for "search" (vs "match") prefix code
+
+    for (; *re; re++) {
+        switch (*re) {
+        case '\\':
+            re++;
+        default:
+            pc += 2;
+            break;
+        case '+':
+            // Skip entire "+?"
+            if (re[1] == '?')
+                re++;
+        case '?':
+            pc += 2;
+            break;
+        case '.':
+        case '^':
+        case '$':
+            pc++;
+            break;
+        case '*':
+            // Skip entire "*?"
+            if (re[1] == '?')
+                re++;
+        case '|':
+        case '(':
+            pc += 4;
+            break;
+        case ')':
+            break;
+        }
+    }
+
+    return pc;
+}
+
+#define EMIT(at, byte) code[at] = byte
+
+const char *_compilecode(const char *re, ByteProg *prog)
+{
+    char *code = prog->insts;
+    int pc = prog->bytelen;
+    int start = pc;
+    int term = pc;
+    int alt_label = 0;
+
+    for (; *re && *re != ')'; re++) {
+        switch (*re) {
+        case '\\':
+            re++;
+        default:
+            term = pc;
+            EMIT(pc++, Char);
+            EMIT(pc++, *re);
+            prog->len++;
+            break;
+        case '.':
+            term = pc;
+            EMIT(pc++, Any);
+            prog->len++;
+            break;
+        case '(':
+            term = pc;
+
+            EMIT(pc++, Save);
+            EMIT(pc++, 2 * ++prog->sub);
+            prog->len++;
+
+            prog->bytelen = pc;
+            re = _compilecode(re + 1, prog);
+            pc = prog->bytelen;
+
+            EMIT(pc++, Save);
+            EMIT(pc++, 2 * prog->sub + 1);
+            prog->len++;
+
+            break;
+        case '?':
+            insert_code(code, term, 2, &pc);
+            EMIT(term, Split);
+            EMIT(term + 1, REL(term, pc));
+            prog->len++;
+            break;
+        case '*':
+            insert_code(code, term, 2, &pc);
+            EMIT(pc, Jmp);
+            EMIT(pc + 1, REL(pc, term));
+            pc += 2;
+            if (re[1] == '?') {
+                EMIT(term, RSplit);
+                re++;
+            } else {
+                EMIT(term, Split);
+            }
+            EMIT(term + 1, REL(term, pc));
+            prog->len += 2;
+            break;
+        case '+':
+            if (re[1] == '?') {
+                EMIT(pc, Split);
+                re++;
+            } else {
+                EMIT(pc, RSplit);
+            }
+            EMIT(pc + 1, REL(pc, term));
+            pc += 2;
+            prog->len++;
+            break;
+        case '|':
+            if (alt_label) {
+                EMIT(alt_label, REL(alt_label, pc) + 1);
+            }
+            insert_code(code, start, 2, &pc);
+            EMIT(pc++, Jmp);
+            alt_label = pc++;
+            EMIT(start, Split);
+            EMIT(start + 1, REL(start, pc));
+            prog->len += 2;
+            break;
+        case '^':
+            EMIT(pc++, Bol);
+            prog->len++;
+            break;
+        case '$':
+            EMIT(pc++, Eol);
+            prog->len++;
+            break;
+        }
+    }
+
+    if (alt_label) {
+        EMIT(alt_label, REL(alt_label, pc) + 1);
+    }
+    prog->bytelen = pc;
+    return re;
+}
+
+int re1_5_compilecode(ByteProg *prog, const char *re)
+{
+    prog->len = 0;
+    prog->bytelen = 0;
+    prog->sub = 0;
+
+    // Add code to implement non-anchored operation ("search"),
+    // for anchored operation ("match"), this code will be just skipped.
+    // TODO: Implement search in much more efficient manner
+    prog->insts[prog->bytelen++] = RSplit;
+    prog->insts[prog->bytelen++] = 3;
+    prog->insts[prog->bytelen++] = Any;
+    prog->insts[prog->bytelen++] = Jmp;
+    prog->insts[prog->bytelen++] = -5;
+    prog->len += 3;
+
+    prog->insts[prog->bytelen++] = Save;
+    prog->insts[prog->bytelen++] = 0;
+    prog->len++;
+
+    _compilecode(re, prog);
+
+    prog->insts[prog->bytelen++] = Save;
+    prog->insts[prog->bytelen++] = 1;
+    prog->len++;
+
+    prog->insts[prog->bytelen++] = Match;
+    prog->len++;
+
+    return 0;
+}
+
+void
+cleanmarks(ByteProg *prog)
+{
+       char *pc = prog->insts;
+       char *end = pc + prog->bytelen;
+       while (pc < end) {
+               *pc &= 0x7f;
+               switch (*pc) {
+               case Jmp:
+               case Split:
+               case RSplit:
+               case Save:
+               case Char:
+                       pc++;
+               }
+               pc++;
+       }
+}
+
+#if 0
+int main(int argc, char *argv[])
+{
+    int pc = 0;
+    ByteProg *code = re1_5_compilecode(argv[1]);
+    re1_5_dumpcode(code);
+}
+#endif

extmod/re1.5/dumpcode.c

+// Copyright 2014 Paul Sokolovsky.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "regexp.h"
+
+void re1_5_dumpcode(ByteProg *prog)
+{
+    int pc = 0;
+    char *code = prog->insts;
+    while (pc < prog->bytelen) {
+                printf("%2d: ", pc);
+                switch(code[pc++]) {
+                default:
+                        assert(0);
+//                        re1_5_fatal("printprog");
+                case Split:
+                        printf("split %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
+                        pc++;
+                        break;
+                case RSplit:
+                        printf("rsplit %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
+                        pc++;
+                        break;
+                case Jmp:
+                        printf("jmp %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
+                        pc++;
+                        break;
+                case Char:
+                        printf("char %c\n", code[pc++]);
+                        break;
+                case Any:
+                        printf("any\n");
+                        break;
+                case Match:
+                        printf("match\n");
+                        break;
+                case Save:
+                        printf("save %d\n", (unsigned char)code[pc++]);
+                        break;
+                case Bol:
+                        printf("assert bol\n");
+                        break;
+                case Eol:
+                        printf("assert eol\n");
+                        break;
+                }
+    }
+    printf("Bytes: %d, insts: %d\n", prog->bytelen, prog->len);
+}

extmod/re1.5/recursiveloop.c

+// Copyright 2007-2009 Russ Cox.  All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "regexp.h"
+
+static int
+recursiveloop(char *pc, const char *sp, Subject *input, const char **subp, int nsubp)
+{
+	const char *old;
+	int off;
+	
+	for(;;) {
+		if(inst_is_consumer(*pc)) {
+			// If we need to match a character, but there's none left, it's fail
+			if(sp >= input->end)
+				return 0;
+		}
+		switch(*pc++) {
+		case Char:
+			if(*sp != *pc++)
+				return 0;
+		case Any:
+			sp++;
+			continue;
+		case Match:
+			return 1;
+		case Jmp:
+			off = (signed char)*pc++;
+			pc = pc + off;
+			continue;
+		case Split:
+			off = (signed char)*pc++;
+			if(recursiveloop(pc, sp, input, subp, nsubp))
+				return 1;
+			pc = pc + off;
+			continue;
+		case RSplit:
+			off = (signed char)*pc++;
+			if(recursiveloop(pc + off, sp, input, subp, nsubp))
+				return 1;
+			continue;
+		case Save:
+			off = (unsigned char)*pc++;
+			if(off >= nsubp) {
+				continue;
+			}
+			old = subp[off];
+			subp[off] = sp;
+			if(recursiveloop(pc, sp, input, subp, nsubp))
+				return 1;
+			subp[off] = old;
+			return 0;
+		case Bol:
+			if(sp != input->begin)
+				return 0;
+			continue;
+		case Eol:
+			if(sp != input->end)
+				return 0;
+			continue;
+		}
+		re1_5_fatal("recursiveloop");
+	}
+}
+
+int
+re1_5_recursiveloopprog(ByteProg *prog, Subject *input, const char **subp, int nsubp, int is_anchored)
+{
+	return recursiveloop(HANDLE_ANCHORED(prog->insts, is_anchored), input->begin, input, subp, nsubp);
+}

extmod/re1.5/regexp.h

+// Copyright 2007-2009 Russ Cox.  All Rights Reserved.
+// Copyright 2014 Paul Sokolovsky.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <assert.h>
+
+#define nil ((void*)0)
+#define nelem(x) (sizeof(x)/sizeof((x)[0]))
+
+typedef struct Regexp Regexp;
+typedef struct Prog Prog;
+typedef struct ByteProg ByteProg;
+typedef struct Inst Inst;
+typedef struct Subject Subject;
+
+struct Regexp
+{
+	int type;
+	int n;
+	int ch;
+	Regexp *left;
+	Regexp *right;
+};
+
+enum	/* Regexp.type */
+{
+	Alt = 1,
+	Cat,
+	Lit,
+	Dot,
+	Paren,
+	Quest,
+	Star,
+	Plus,
+};
+
+Regexp *parse(char*);
+Regexp *reg(int type, Regexp *left, Regexp *right);
+void printre(Regexp*);
+#ifndef re1_5_fatal
+void re1_5_fatal(char*);
+#endif
+void *mal(int);
+
+struct Prog
+{
+	Inst *start;
+	int len;
+};
+
+struct ByteProg
+{
+	int bytelen;
+	int len;
+	int sub;
+	char insts[0];
+};
+
+struct Inst
+{
+	int opcode;
+	int c;
+	int n;
+	Inst *x;
+	Inst *y;
+	int gen;	// global state, oooh!
+};
+
+enum	/* Inst.opcode */
+{
+	// Instructions which consume input bytes (and thus fail if none left)
+	CONSUMERS = 1,
+	Char = CONSUMERS,
+	Any,
+	ASSERTS = 0x50,
+	Bol = ASSERTS,
+	Eol,
+	// Instructions which take relative offset as arg
+	JUMPS = 0x60,
+	Jmp = JUMPS,
+	Split,
+	RSplit,
+	// Other (special) instructions
+	Save = 0x7e,
+	Match = 0x7f,
+};
+
+#define inst_is_consumer(inst) ((inst) < ASSERTS)
+#define inst_is_jump(inst) ((inst) & 0x70 == JUMPS)
+
+Prog *compile(Regexp*);
+void printprog(Prog*);
+
+extern int gen;
+
+enum {
+	MAXSUB = 20
+};
+
+typedef struct Sub Sub;
+
+struct Sub
+{
+	int ref;
+	int nsub;
+	const char *sub[MAXSUB];
+};
+
+Sub *newsub(int n);
+Sub *incref(Sub*);
+Sub *copy(Sub*);
+Sub *update(Sub*, int, const char*);
+void decref(Sub*);
+
+struct Subject {
+	const char *begin;
+	const char *end;
+};
+
+
+#define NON_ANCHORED_PREFIX 5
+#define HANDLE_ANCHORED(bytecode, is_anchored) ((is_anchored) ? (bytecode) + NON_ANCHORED_PREFIX : (bytecode))
+
+int re1_5_backtrack(ByteProg*, Subject*, const char**, int, int);
+int re1_5_pikevm(ByteProg*, Subject*, const char**, int, int);
+int re1_5_recursiveloopprog(ByteProg*, Subject*, const char**, int, int);
+int re1_5_recursiveprog(ByteProg*, Subject*, const char**, int, int);
+int re1_5_thompsonvm(ByteProg*, Subject*, const char**, int, int);
+
+int re1_5_sizecode(const char *re);
+int re1_5_compilecode(ByteProg *prog, const char *re);
+void re1_5_dumpcode(ByteProg *prog);
+void cleanmarks(ByteProg *prog);

py/builtin.h

@@ -90,3 +90,4 @@ extern struct _dummy_t mp_sys_stderr_obj;
 extern const mp_obj_module_t mp_module_uctypes;
 extern const mp_obj_module_t mp_module_zlibd;
 extern const mp_obj_module_t mp_module_ujson;
+extern const mp_obj_module_t mp_module_ure;

py/builtintables.c

@@ -209,6 +209,9 @@ STATIC const mp_map_elem_t mp_builtin_module_table[] = {
 #if MICROPY_PY_UJSON
     { MP_OBJ_NEW_QSTR(MP_QSTR_ujson), (mp_obj_t)&mp_module_ujson },
 #endif
+#if MICROPY_PY_URE
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ure), (mp_obj_t)&mp_module_ure },
+#endif
 
     // extra builtin modules as defined by a port
     MICROPY_PORT_BUILTIN_MODULES

py/mpconfig.h

@@ -394,6 +394,10 @@ typedef double mp_float_t;
 #define MICROPY_PY_UJSON (0)
 #endif
 
+#ifndef MICROPY_PY_URE
+#define MICROPY_PY_URE (0)
+#endif
+
 /*****************************************************************************/
 /* Hooks for a port to add builtins                                          */
 

py/py.mk

@@ -113,6 +113,10 @@ PY_O_BASENAME = \
 	../extmod/moductypes.o \
 	../extmod/modzlibd.o \
 	../extmod/modujson.o \
+	../extmod/modure.o \
+	../extmod/re1.5/compilecode.o \
+	../extmod/re1.5/dumpcode.o \
+	../extmod/re1.5/recursiveloop.o \
 
 # prepend the build destination prefix to the py object files
 PY_O = $(addprefix $(PY_BUILD)/, $(PY_O_BASENAME))
@@ -166,3 +170,6 @@ $(PY_BUILD)/gc.o: CFLAGS += $(CSUPEROPT)
 # optimising vm for speed, adds only a small amount to code size but makes a huge difference to speed (20% faster)
 $(PY_BUILD)/vm.o: CFLAGS += $(CSUPEROPT)
 
+# Additional options for 3rd-party libs
+
+$(PY_BUILD)/../extmod/re1.5/recursiveloop.o: CFLAGS += "-Dre1_5_fatal(x)=assert(!x)"

py/qstrdefs.h

@@ -473,3 +473,12 @@ Q(ujson)
 Q(dumps)
 Q(loads)
 #endif
+
+#if MICROPY_PY_URE
+Q(ure)
+Q(compile)
+Q(match)
+Q(search)
+Q(group)
+Q(DEBUG)
+#endif

stmhal/mpconfigport.h

@@ -58,6 +58,7 @@
 #define MICROPY_PY_UCTYPES          (1)
 #define MICROPY_PY_ZLIBD            (1)
 #define MICROPY_PY_UJSON            (1)
+#define MICROPY_PY_URE              (1)
 
 #define MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF   (1)
 #define MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE  (0)

tests/extmod/ure1.py

+try:
+    import ure as re
+except ImportError:
+    import re
+
+r = re.compile(".+")
+m = r.match("abc")
+print(m.group(0))
+try:
+    m.group(1)
+except IndexError:
+    print("IndexError")
+
+r = re.compile("(.+)1")
+m = r.match("xyz781")
+print(m.group(0))
+print(m.group(1))
+try:
+    m.group(2)
+except IndexError:
+    print("IndexError")
+
+
+r = re.compile("o+")
+m = r.search("foobar")
+print(m.group(0))
+try:
+    m.group(1)
+except IndexError:
+    print("IndexError")
+
+
+m = re.match(".*", "foo")
+print(m.group(0))
+
+m = re.search("w.r", "hello world")
+print(m.group(0))

tests/extmod/ure_split.py

+try:
+    import ure as re
+except ImportError:
+    import re
+
+r = re.compile(" ")
+s = r.split("a b c foobar")
+print(s)
+
+r = re.compile(" +")
+s = r.split("a b    c   foobar")
+print(s)
+
+r = re.compile(" +")
+s = r.split("a b    c   foobar", 1)
+print(s)
+
+r = re.compile(" +")
+s = r.split("a b    c   foobar", 2)
+print(s)
+
+r = re.compile(" *")
+s = r.split("a b    c   foobar")
+# TODO - no idea how this is supposed to work, per docs, empty match == stop
+# splitting, so CPython code apparently does some dirty magic.
+#print(s)
+
+r = re.compile("x*")
+s = r.split("foo")
+print(s)
+
+r = re.compile("[a-f]+")
+s = r.split("0a3b9")
+# TODO - char classes are not yet supported by re1.5
+#print(s)

unix/mpconfigport.h

@@ -57,6 +57,7 @@
 #define MICROPY_PY_UCTYPES          (1)
 #define MICROPY_PY_ZLIBD            (1)
 #define MICROPY_PY_UJSON            (1)
+#define MICROPY_PY_URE              (1)
 
 // Define to MICROPY_ERROR_REPORTING_DETAILED to get function, etc.
 // names in exception messages (may require more RAM).