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Diffstat (limited to 'trunk/regparse.c')
| -rw-r--r-- | trunk/regparse.c | 5544 |
1 files changed, 5544 insertions, 0 deletions
diff --git a/trunk/regparse.c b/trunk/regparse.c new file mode 100644 index 0000000000..3d2c57a25a --- /dev/null +++ b/trunk/regparse.c @@ -0,0 +1,5544 @@ +/********************************************************************** + regparse.c - Oniguruma (regular expression library) +**********************************************************************/ +/*- + * Copyright (c) 2002-2007 K.Kosako <sndgk393 AT ybb DOT ne DOT jp> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 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 BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "regparse.h" + +#define WARN_BUFSIZE 256 + +#define CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS + + +const OnigSyntaxType OnigSyntaxRuby = { + (( SYN_GNU_REGEX_OP | ONIG_SYN_OP_QMARK_NON_GREEDY | + ONIG_SYN_OP_ESC_OCTAL3 | ONIG_SYN_OP_ESC_X_HEX2 | + ONIG_SYN_OP_ESC_X_BRACE_HEX8 | ONIG_SYN_OP_ESC_CONTROL_CHARS | + ONIG_SYN_OP_ESC_C_CONTROL ) + & ~ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END ) + , ( ONIG_SYN_OP2_QMARK_GROUP_EFFECT | + ONIG_SYN_OP2_OPTION_RUBY | + ONIG_SYN_OP2_QMARK_LT_NAMED_GROUP | ONIG_SYN_OP2_ESC_K_NAMED_BACKREF | + ONIG_SYN_OP2_ESC_G_SUBEXP_CALL | + ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY | + ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT | + ONIG_SYN_OP2_PLUS_POSSESSIVE_REPEAT | + ONIG_SYN_OP2_CCLASS_SET_OP | ONIG_SYN_OP2_ESC_CAPITAL_C_BAR_CONTROL | + ONIG_SYN_OP2_ESC_CAPITAL_M_BAR_META | ONIG_SYN_OP2_ESC_V_VTAB | + ONIG_SYN_OP2_ESC_H_XDIGIT ) + , ( SYN_GNU_REGEX_BV | + ONIG_SYN_ALLOW_INTERVAL_LOW_ABBREV | + ONIG_SYN_DIFFERENT_LEN_ALT_LOOK_BEHIND | + ONIG_SYN_CAPTURE_ONLY_NAMED_GROUP | + ONIG_SYN_ALLOW_MULTIPLEX_DEFINITION_NAME | + ONIG_SYN_FIXED_INTERVAL_IS_GREEDY_ONLY | + ONIG_SYN_WARN_CC_OP_NOT_ESCAPED | + ONIG_SYN_WARN_REDUNDANT_NESTED_REPEAT ) + , ONIG_OPTION_NONE + , + { + (OnigCodePoint )'\\' /* esc */ + , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */ + , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */ + , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */ + , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */ + , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */ + } +}; + +const OnigSyntaxType* OnigDefaultSyntax = ONIG_SYNTAX_RUBY; + +extern void onig_null_warn(const char* s ARG_UNUSED) { } + +#ifdef DEFAULT_WARN_FUNCTION +static OnigWarnFunc onig_warn = (OnigWarnFunc )DEFAULT_WARN_FUNCTION; +#else +static OnigWarnFunc onig_warn = onig_null_warn; +#endif + +#ifdef DEFAULT_VERB_WARN_FUNCTION +static OnigWarnFunc onig_verb_warn = (OnigWarnFunc )DEFAULT_VERB_WARN_FUNCTION; +#else +static OnigWarnFunc onig_verb_warn = onig_null_warn; +#endif + +extern void onig_set_warn_func(OnigWarnFunc f) +{ + onig_warn = f; +} + +extern void onig_set_verb_warn_func(OnigWarnFunc f) +{ + onig_verb_warn = f; +} + +static void +bbuf_free(BBuf* bbuf) +{ + if (IS_NOT_NULL(bbuf)) { + if (IS_NOT_NULL(bbuf->p)) xfree(bbuf->p); + xfree(bbuf); + } +} + +static int +bbuf_clone(BBuf** rto, BBuf* from) +{ + int r; + BBuf *to; + + *rto = to = (BBuf* )xmalloc(sizeof(BBuf)); + CHECK_NULL_RETURN_MEMERR(to); + r = BBUF_INIT(to, from->alloc); + if (r != 0) return r; + to->used = from->used; + xmemcpy(to->p, from->p, from->used); + return 0; +} + +#define BACKREF_REL_TO_ABS(rel_no, env) \ + ((env)->num_mem + 1 + (rel_no)) + +#define ONOFF(v,f,negative) (negative) ? ((v) &= ~(f)) : ((v) |= (f)) + +#define MBCODE_START_POS(enc) \ + (OnigCodePoint )(ONIGENC_MBC_MINLEN(enc) > 1 ? 0 : 0x80) + +#define SET_ALL_MULTI_BYTE_RANGE(enc, pbuf) \ + add_code_range_to_buf(pbuf, MBCODE_START_POS(enc), ~((OnigCodePoint )0)) + +#define ADD_ALL_MULTI_BYTE_RANGE(enc, mbuf) do {\ + if (! ONIGENC_IS_SINGLEBYTE(enc)) {\ + r = SET_ALL_MULTI_BYTE_RANGE(enc, &(mbuf));\ + if (r) return r;\ + }\ +} while (0) + + +#define BITSET_IS_EMPTY(bs,empty) do {\ + int i;\ + empty = 1;\ + for (i = 0; i < (int )BITSET_SIZE; i++) {\ + if ((bs)[i] != 0) {\ + empty = 0; break;\ + }\ + }\ +} while (0) + +static void +bitset_set_range(BitSetRef bs, int from, int to) +{ + int i; + for (i = from; i <= to && i < SINGLE_BYTE_SIZE; i++) { + BITSET_SET_BIT(bs, i); + } +} + +#if 0 +static void +bitset_set_all(BitSetRef bs) +{ + int i; + for (i = 0; i < BITSET_SIZE; i++) { bs[i] = ~((Bits )0); } +} +#endif + +static void +bitset_invert(BitSetRef bs) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { bs[i] = ~(bs[i]); } +} + +static void +bitset_invert_to(BitSetRef from, BitSetRef to) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { to[i] = ~(from[i]); } +} + +static void +bitset_and(BitSetRef dest, BitSetRef bs) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { dest[i] &= bs[i]; } +} + +static void +bitset_or(BitSetRef dest, BitSetRef bs) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { dest[i] |= bs[i]; } +} + +static void +bitset_copy(BitSetRef dest, BitSetRef bs) +{ + int i; + for (i = 0; i < (int )BITSET_SIZE; i++) { dest[i] = bs[i]; } +} + +extern int +onig_strncmp(const UChar* s1, const UChar* s2, int n) +{ + int x; + + while (n-- > 0) { + x = *s2++ - *s1++; + if (x) return x; + } + return 0; +} + +extern void +onig_strcpy(UChar* dest, const UChar* src, const UChar* end) +{ + int len = end - src; + if (len > 0) { + xmemcpy(dest, src, len); + dest[len] = (UChar )0; + } +} + +#ifdef USE_NAMED_GROUP +static UChar* +strdup_with_null(OnigEncoding enc, UChar* s, UChar* end) +{ + int slen, term_len, i; + UChar *r; + + slen = end - s; + term_len = ONIGENC_MBC_MINLEN(enc); + + r = (UChar* )xmalloc(slen + term_len); + CHECK_NULL_RETURN(r); + xmemcpy(r, s, slen); + + for (i = 0; i < term_len; i++) + r[slen + i] = (UChar )0; + + return r; +} +#endif + +/* scan pattern methods */ +#define PEND_VALUE 0 + +#define PFETCH_READY UChar* pfetch_prev +#define PEND (p < end ? 0 : 1) +#define PUNFETCH p = pfetch_prev +#define PINC do { \ + pfetch_prev = p; \ + p += enclen(enc, p, end); \ +} while (0) +#define PFETCH(c) do { \ + c = ((enc->max_enc_len == 1) ? *p : ONIGENC_MBC_TO_CODE(enc, p, end)); \ + pfetch_prev = p; \ + p += enclen(enc, p, end); \ +} while (0) + +#define PPEEK (p < end ? ONIGENC_MBC_TO_CODE(enc, p, end) : PEND_VALUE) +#define PPEEK_IS(c) (PPEEK == (OnigCodePoint )c) + +static UChar* +strcat_capa(UChar* dest, UChar* dest_end, const UChar* src, const UChar* src_end, + int capa) +{ + UChar* r; + + if (dest) + r = (UChar* )xrealloc(dest, capa + 1); + else + r = (UChar* )xmalloc(capa + 1); + + CHECK_NULL_RETURN(r); + onig_strcpy(r + (dest_end - dest), src, src_end); + return r; +} + +/* dest on static area */ +static UChar* +strcat_capa_from_static(UChar* dest, UChar* dest_end, + const UChar* src, const UChar* src_end, int capa) +{ + UChar* r; + + r = (UChar* )xmalloc(capa + 1); + CHECK_NULL_RETURN(r); + onig_strcpy(r, dest, dest_end); + onig_strcpy(r + (dest_end - dest), src, src_end); + return r; +} + + +#ifdef USE_ST_LIBRARY + +#include "ruby/st.h" + +typedef struct { + UChar* s; + UChar* end; +} st_str_end_key; + +static int +str_end_cmp(st_str_end_key* x, st_str_end_key* y) +{ + UChar *p, *q; + int c; + + if ((x->end - x->s) != (y->end - y->s)) + return 1; + + p = x->s; + q = y->s; + while (p < x->end) { + c = (int )*p - (int )*q; + if (c != 0) return c; + + p++; q++; + } + + return 0; +} + +static int +str_end_hash(st_str_end_key* x) +{ + UChar *p; + int val = 0; + + p = x->s; + while (p < x->end) { + val = val * 997 + (int )*p++; + } + + return val + (val >> 5); +} + +extern hash_table_type* +onig_st_init_strend_table_with_size(int size) +{ + static const struct st_hash_type hashType = { + str_end_cmp, + str_end_hash, + }; + + return (hash_table_type* ) + onig_st_init_table_with_size(&hashType, size); +} + +extern int +onig_st_lookup_strend(hash_table_type* table, const UChar* str_key, + const UChar* end_key, hash_data_type *value) +{ + st_str_end_key key; + + key.s = (UChar* )str_key; + key.end = (UChar* )end_key; + + return onig_st_lookup(table, (st_data_t )(&key), value); +} + +extern int +onig_st_insert_strend(hash_table_type* table, const UChar* str_key, + const UChar* end_key, hash_data_type value) +{ + st_str_end_key* key; + int result; + + key = (st_str_end_key* )xmalloc(sizeof(st_str_end_key)); + key->s = (UChar* )str_key; + key->end = (UChar* )end_key; + result = onig_st_insert(table, (st_data_t )key, value); + if (result) { + xfree(key); + } + return result; +} + +#endif /* USE_ST_LIBRARY */ + + +#ifdef USE_NAMED_GROUP + +#define INIT_NAME_BACKREFS_ALLOC_NUM 8 + +typedef struct { + UChar* name; + int name_len; /* byte length */ + int back_num; /* number of backrefs */ + int back_alloc; + int back_ref1; + int* back_refs; +} NameEntry; + +#ifdef USE_ST_LIBRARY + +typedef st_table NameTable; +typedef st_data_t HashDataType; /* 1.6 st.h doesn't define st_data_t type */ + +#define NAMEBUF_SIZE 24 +#define NAMEBUF_SIZE_1 25 + +#ifdef ONIG_DEBUG +static int +i_print_name_entry(UChar* key, NameEntry* e, void* arg) +{ + int i; + FILE* fp = (FILE* )arg; + + fprintf(fp, "%s: ", e->name); + if (e->back_num == 0) + fputs("-", fp); + else if (e->back_num == 1) + fprintf(fp, "%d", e->back_ref1); + else { + for (i = 0; i < e->back_num; i++) { + if (i > 0) fprintf(fp, ", "); + fprintf(fp, "%d", e->back_refs[i]); + } + } + fputs("\n", fp); + return ST_CONTINUE; +} + +extern int +onig_print_names(FILE* fp, regex_t* reg) +{ + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + fprintf(fp, "name table\n"); + onig_st_foreach(t, i_print_name_entry, (HashDataType )fp); + fputs("\n", fp); + } + return 0; +} +#endif /* ONIG_DEBUG */ + +static int +i_free_name_entry(UChar* key, NameEntry* e, void* arg ARG_UNUSED) +{ + xfree(e->name); + if (IS_NOT_NULL(e->back_refs)) xfree(e->back_refs); + xfree(key); + xfree(e); + return ST_DELETE; +} + +static int +names_clear(regex_t* reg) +{ + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + onig_st_foreach(t, i_free_name_entry, 0); + } + return 0; +} + +extern int +onig_names_free(regex_t* reg) +{ + int r; + NameTable* t; + + r = names_clear(reg); + if (r) return r; + + t = (NameTable* )reg->name_table; + if (IS_NOT_NULL(t)) onig_st_free_table(t); + reg->name_table = (void* )NULL; + return 0; +} + +static NameEntry* +name_find(regex_t* reg, const UChar* name, const UChar* name_end) +{ + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + e = (NameEntry* )NULL; + if (IS_NOT_NULL(t)) { + onig_st_lookup_strend(t, name, name_end, (HashDataType* )((void* )(&e))); + } + return e; +} + +typedef struct { + int (*func)(const UChar*, const UChar*,int,int*,regex_t*,void*); + regex_t* reg; + void* arg; + int ret; + OnigEncoding enc; +} INamesArg; + +static int +i_names(UChar* key ARG_UNUSED, NameEntry* e, INamesArg* arg) +{ + int r = (*(arg->func))(e->name, + e->name + e->name_len, + e->back_num, + (e->back_num > 1 ? e->back_refs : &(e->back_ref1)), + arg->reg, arg->arg); + if (r != 0) { + arg->ret = r; + return ST_STOP; + } + return ST_CONTINUE; +} + +extern int +onig_foreach_name(regex_t* reg, + int (*func)(const UChar*, const UChar*,int,int*,regex_t*,void*), void* arg) +{ + INamesArg narg; + NameTable* t = (NameTable* )reg->name_table; + + narg.ret = 0; + if (IS_NOT_NULL(t)) { + narg.func = func; + narg.reg = reg; + narg.arg = arg; + narg.enc = reg->enc; /* should be pattern encoding. */ + onig_st_foreach(t, i_names, (HashDataType )&narg); + } + return narg.ret; +} + +static int +i_renumber_name(UChar* key ARG_UNUSED, NameEntry* e, GroupNumRemap* map) +{ + int i; + + if (e->back_num > 1) { + for (i = 0; i < e->back_num; i++) { + e->back_refs[i] = map[e->back_refs[i]].new_val; + } + } + else if (e->back_num == 1) { + e->back_ref1 = map[e->back_ref1].new_val; + } + + return ST_CONTINUE; +} + +extern int +onig_renumber_name_table(regex_t* reg, GroupNumRemap* map) +{ + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + onig_st_foreach(t, i_renumber_name, (HashDataType )map); + } + return 0; +} + + +extern int +onig_number_of_names(regex_t* reg) +{ + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) + return t->num_entries; + else + return 0; +} + +#else /* USE_ST_LIBRARY */ + +#define INIT_NAMES_ALLOC_NUM 8 + +typedef struct { + NameEntry* e; + int num; + int alloc; +} NameTable; + +#ifdef ONIG_DEBUG +extern int +onig_print_names(FILE* fp, regex_t* reg) +{ + int i, j; + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t) && t->num > 0) { + fprintf(fp, "name table\n"); + for (i = 0; i < t->num; i++) { + e = &(t->e[i]); + fprintf(fp, "%s: ", e->name); + if (e->back_num == 0) { + fputs("-", fp); + } + else if (e->back_num == 1) { + fprintf(fp, "%d", e->back_ref1); + } + else { + for (j = 0; j < e->back_num; j++) { + if (j > 0) fprintf(fp, ", "); + fprintf(fp, "%d", e->back_refs[j]); + } + } + fputs("\n", fp); + } + fputs("\n", fp); + } + return 0; +} +#endif + +static int +names_clear(regex_t* reg) +{ + int i; + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + for (i = 0; i < t->num; i++) { + e = &(t->e[i]); + if (IS_NOT_NULL(e->name)) { + xfree(e->name); + e->name = NULL; + e->name_len = 0; + e->back_num = 0; + e->back_alloc = 0; + if (IS_NOT_NULL(e->back_refs)) xfree(e->back_refs); + e->back_refs = (int* )NULL; + } + } + if (IS_NOT_NULL(t->e)) { + xfree(t->e); + t->e = NULL; + } + t->num = 0; + } + return 0; +} + +extern int +onig_names_free(regex_t* reg) +{ + int r; + NameTable* t; + + r = names_clear(reg); + if (r) return r; + + t = (NameTable* )reg->name_table; + if (IS_NOT_NULL(t)) xfree(t); + reg->name_table = NULL; + return 0; +} + +static NameEntry* +name_find(regex_t* reg, UChar* name, UChar* name_end) +{ + int i, len; + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + len = name_end - name; + for (i = 0; i < t->num; i++) { + e = &(t->e[i]); + if (len == e->name_len && onig_strncmp(name, e->name, len) == 0) + return e; + } + } + return (NameEntry* )NULL; +} + +extern int +onig_foreach_name(regex_t* reg, + int (*func)(const UChar*, const UChar*,int,int*,regex_t*,void*), void* arg) +{ + int i, r; + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) { + for (i = 0; i < t->num; i++) { + e = &(t->e[i]); + r = (*func)(e->name, e->name + e->name_len, e->back_num, + (e->back_num > 1 ? e->back_refs : &(e->back_ref1)), + reg, arg); + if (r != 0) return r; + } + } + return 0; +} + +extern int +onig_number_of_names(regex_t* reg) +{ + NameTable* t = (NameTable* )reg->name_table; + + if (IS_NOT_NULL(t)) + return t->num; + else + return 0; +} + +#endif /* else USE_ST_LIBRARY */ + +static int +name_add(regex_t* reg, UChar* name, UChar* name_end, int backref, ScanEnv* env) +{ + int alloc; + NameEntry* e; + NameTable* t = (NameTable* )reg->name_table; + + if (name_end - name <= 0) + return ONIGERR_EMPTY_GROUP_NAME; + + e = name_find(reg, name, name_end); + if (IS_NULL(e)) { +#ifdef USE_ST_LIBRARY + if (IS_NULL(t)) { + t = onig_st_init_strend_table_with_size(5); + reg->name_table = (void* )t; + } + e = (NameEntry* )xmalloc(sizeof(NameEntry)); + CHECK_NULL_RETURN_MEMERR(e); + + e->name = strdup_with_null(reg->enc, name, name_end); + if (IS_NULL(e->name)) { + xfree(e); + return ONIGERR_MEMORY; + } + onig_st_insert_strend(t, e->name, (e->name + (name_end - name)), + (HashDataType )e); + + e->name_len = name_end - name; + e->back_num = 0; + e->back_alloc = 0; + e->back_refs = (int* )NULL; + +#else + + if (IS_NULL(t)) { + alloc = INIT_NAMES_ALLOC_NUM; + t = (NameTable* )xmalloc(sizeof(NameTable)); + CHECK_NULL_RETURN_MEMERR(t); + t->e = NULL; + t->alloc = 0; + t->num = 0; + + t->e = (NameEntry* )xmalloc(sizeof(NameEntry) * alloc); + if (IS_NULL(t->e)) { + xfree(t); + return ONIGERR_MEMORY; + } + t->alloc = alloc; + reg->name_table = t; + goto clear; + } + else if (t->num == t->alloc) { + int i; + + alloc = t->alloc * 2; + t->e = (NameEntry* )xrealloc(t->e, sizeof(NameEntry) * alloc); + CHECK_NULL_RETURN_MEMERR(t->e); + t->alloc = alloc; + + clear: + for (i = t->num; i < t->alloc; i++) { + t->e[i].name = NULL; + t->e[i].name_len = 0; + t->e[i].back_num = 0; + t->e[i].back_alloc = 0; + t->e[i].back_refs = (int* )NULL; + } + } + e = &(t->e[t->num]); + t->num++; + e->name = strdup_with_null(reg->enc, name, name_end); + e->name_len = name_end - name; +#endif + } + + if (e->back_num >= 1 && + ! IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_MULTIPLEX_DEFINITION_NAME)) { + onig_scan_env_set_error_string(env, ONIGERR_MULTIPLEX_DEFINED_NAME, + name, name_end); + return ONIGERR_MULTIPLEX_DEFINED_NAME; + } + + e->back_num++; + if (e->back_num == 1) { + e->back_ref1 = backref; + } + else { + if (e->back_num == 2) { + alloc = INIT_NAME_BACKREFS_ALLOC_NUM; + e->back_refs = (int* )xmalloc(sizeof(int) * alloc); + CHECK_NULL_RETURN_MEMERR(e->back_refs); + e->back_alloc = alloc; + e->back_refs[0] = e->back_ref1; + e->back_refs[1] = backref; + } + else { + if (e->back_num > e->back_alloc) { + alloc = e->back_alloc * 2; + e->back_refs = (int* )xrealloc(e->back_refs, sizeof(int) * alloc); + CHECK_NULL_RETURN_MEMERR(e->back_refs); + e->back_alloc = alloc; + } + e->back_refs[e->back_num - 1] = backref; + } + } + + return 0; +} + +extern int +onig_name_to_group_numbers(regex_t* reg, const UChar* name, + const UChar* name_end, int** nums) +{ + NameEntry* e = name_find(reg, name, name_end); + + if (IS_NULL(e)) return ONIGERR_UNDEFINED_NAME_REFERENCE; + + switch (e->back_num) { + case 0: + *nums = 0; + break; + case 1: + *nums = &(e->back_ref1); + break; + default: + *nums = e->back_refs; + break; + } + return e->back_num; +} + +extern int +onig_name_to_backref_number(regex_t* reg, const UChar* name, + const UChar* name_end, OnigRegion *region) +{ + int i, n, *nums; + + n = onig_name_to_group_numbers(reg, name, name_end, &nums); + if (n < 0) + return n; + else if (n == 0) + return ONIGERR_PARSER_BUG; + else if (n == 1) + return nums[0]; + else { + if (IS_NOT_NULL(region)) { + for (i = n - 1; i >= 0; i--) { + if (region->beg[nums[i]] != ONIG_REGION_NOTPOS) + return nums[i]; + } + } + return nums[n - 1]; + } +} + +#else /* USE_NAMED_GROUP */ + +extern int +onig_name_to_group_numbers(regex_t* reg, const UChar* name, + const UChar* name_end, int** nums) +{ + return ONIG_NO_SUPPORT_CONFIG; +} + +extern int +onig_name_to_backref_number(regex_t* reg, const UChar* name, + const UChar* name_end, OnigRegion* region) +{ + return ONIG_NO_SUPPORT_CONFIG; +} + +extern int +onig_foreach_name(regex_t* reg, + int (*func)(const UChar*, const UChar*,int,int*,regex_t*,void*), void* arg) +{ + return ONIG_NO_SUPPORT_CONFIG; +} + +extern int +onig_number_of_names(regex_t* reg) +{ + return 0; +} +#endif /* else USE_NAMED_GROUP */ + +extern int +onig_noname_group_capture_is_active(regex_t* reg) +{ + if (ONIG_IS_OPTION_ON(reg->options, ONIG_OPTION_DONT_CAPTURE_GROUP)) + return 0; + +#ifdef USE_NAMED_GROUP + if (onig_number_of_names(reg) > 0 && + IS_SYNTAX_BV(reg->syntax, ONIG_SYN_CAPTURE_ONLY_NAMED_GROUP) && + !ONIG_IS_OPTION_ON(reg->options, ONIG_OPTION_CAPTURE_GROUP)) { + return 0; + } +#endif + + return 1; +} + + +#define INIT_SCANENV_MEMNODES_ALLOC_SIZE 16 + +static void +scan_env_clear(ScanEnv* env) +{ + int i; + + BIT_STATUS_CLEAR(env->capture_history); + BIT_STATUS_CLEAR(env->bt_mem_start); + BIT_STATUS_CLEAR(env->bt_mem_end); + BIT_STATUS_CLEAR(env->backrefed_mem); + env->error = (UChar* )NULL; + env->error_end = (UChar* )NULL; + env->num_call = 0; + env->num_mem = 0; +#ifdef USE_NAMED_GROUP + env->num_named = 0; +#endif + env->mem_alloc = 0; + env->mem_nodes_dynamic = (Node** )NULL; + + for (i = 0; i < SCANENV_MEMNODES_SIZE; i++) + env->mem_nodes_static[i] = NULL_NODE; + +#ifdef USE_COMBINATION_EXPLOSION_CHECK + env->num_comb_exp_check = 0; + env->comb_exp_max_regnum = 0; + env->curr_max_regnum = 0; + env->has_recursion = 0; +#endif +} + +static int +scan_env_add_mem_entry(ScanEnv* env) +{ + int i, need, alloc; + Node** p; + + need = env->num_mem + 1; + if (need >= SCANENV_MEMNODES_SIZE) { + if (env->mem_alloc <= need) { + if (IS_NULL(env->mem_nodes_dynamic)) { + alloc = INIT_SCANENV_MEMNODES_ALLOC_SIZE; + p = (Node** )xmalloc(sizeof(Node*) * alloc); + xmemcpy(p, env->mem_nodes_static, + sizeof(Node*) * SCANENV_MEMNODES_SIZE); + } + else { + alloc = env->mem_alloc * 2; + p = (Node** )xrealloc(env->mem_nodes_dynamic, sizeof(Node*) * alloc); + } + CHECK_NULL_RETURN_MEMERR(p); + + for (i = env->num_mem + 1; i < alloc; i++) + p[i] = NULL_NODE; + + env->mem_nodes_dynamic = p; + env->mem_alloc = alloc; + } + } + + env->num_mem++; + return env->num_mem; +} + +static int +scan_env_set_mem_node(ScanEnv* env, int num, Node* node) +{ + if (env->num_mem >= num) + SCANENV_MEM_NODES(env)[num] = node; + else + return ONIGERR_PARSER_BUG; + return 0; +} + + +#ifdef USE_PARSE_TREE_NODE_RECYCLE +typedef struct _FreeNode { + struct _FreeNode* next; +} FreeNode; + +static FreeNode* FreeNodeList = (FreeNode* )NULL; +#endif + +extern void +onig_node_free(Node* node) +{ + start: + if (IS_NULL(node)) return ; + + switch (NTYPE(node)) { + case NT_STR: + if (NSTR(node)->capa != 0 && + IS_NOT_NULL(NSTR(node)->s) && NSTR(node)->s != NSTR(node)->buf) { + xfree(NSTR(node)->s); + } + break; + + case NT_LIST: + case NT_ALT: + onig_node_free(NCAR(node)); + { + Node* next_node = NCDR(node); + +#ifdef USE_PARSE_TREE_NODE_RECYCLE + { + FreeNode* n = (FreeNode* )node; + + THREAD_ATOMIC_START; + n->next = FreeNodeList; + FreeNodeList = n; + THREAD_ATOMIC_END; + } +#else + xfree(node); +#endif + node = next_node; + goto start; + } + break; + + case NT_CCLASS: + { + CClassNode* cc = NCCLASS(node); + + if (IS_NCCLASS_SHARE(cc)) return ; + if (cc->mbuf) + bbuf_free(cc->mbuf); + } + break; + + case NT_QTFR: + if (NQTFR(node)->target) + onig_node_free(NQTFR(node)->target); + break; + + case NT_ENCLOSE: + if (NENCLOSE(node)->target) + onig_node_free(NENCLOSE(node)->target); + break; + + case NT_BREF: + if (IS_NOT_NULL(NBREF(node)->back_dynamic)) + xfree(NBREF(node)->back_dynamic); + break; + + case NT_ANCHOR: + if (NANCHOR(node)->target) + onig_node_free(NANCHOR(node)->target); + break; + } + +#ifdef USE_PARSE_TREE_NODE_RECYCLE + { + FreeNode* n = (FreeNode* )node; + + THREAD_ATOMIC_START; + n->next = FreeNodeList; + FreeNodeList = n; + THREAD_ATOMIC_END; + } +#else + xfree(node); +#endif +} + +#ifdef USE_PARSE_TREE_NODE_RECYCLE +extern int +onig_free_node_list(void) +{ + FreeNode* n; + + /* THREAD_ATOMIC_START; */ + while (IS_NOT_NULL(FreeNodeList)) { + n = FreeNodeList; + FreeNodeList = FreeNodeList->next; + xfree(n); + } + /* THREAD_ATOMIC_END; */ + return 0; +} +#endif + +static Node* +node_new(void) +{ + Node* node; + +#ifdef USE_PARSE_TREE_NODE_RECYCLE + THREAD_ATOMIC_START; + if (IS_NOT_NULL(FreeNodeList)) { + node = (Node* )FreeNodeList; + FreeNodeList = FreeNodeList->next; + THREAD_ATOMIC_END; + return node; + } + THREAD_ATOMIC_END; +#endif + + node = (Node* )xmalloc(sizeof(Node)); + /* xmemset(node, 0, sizeof(Node)); */ + return node; +} + + +static void +initialize_cclass(CClassNode* cc) +{ + BITSET_CLEAR(cc->bs); + /* cc->base.flags = 0; */ + cc->flags = 0; + cc->mbuf = NULL; +} + +static Node* +node_new_cclass(void) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_CCLASS); + initialize_cclass(NCCLASS(node)); + return node; +} + +static Node* +node_new_cclass_by_codepoint_range(int not, OnigCodePoint sb_out, + const OnigCodePoint ranges[]) +{ + int n, i; + CClassNode* cc; + OnigCodePoint j; + + Node* node = node_new_cclass(); + CHECK_NULL_RETURN(node); + + cc = NCCLASS(node); + if (not != 0) NCCLASS_SET_NOT(cc); + + BITSET_CLEAR(cc->bs); + if (sb_out > 0 && IS_NOT_NULL(ranges)) { + n = ONIGENC_CODE_RANGE_NUM(ranges); + for (i = 0; i < n; i++) { + for (j = ONIGENC_CODE_RANGE_FROM(ranges, i); + j <= (OnigCodePoint )ONIGENC_CODE_RANGE_TO(ranges, i); j++) { + if (j >= sb_out) goto sb_end; + + BITSET_SET_BIT(cc->bs, j); + } + } + } + + sb_end: + if (IS_NULL(ranges)) { + is_null: + cc->mbuf = NULL; + } + else { + BBuf* bbuf; + + n = ONIGENC_CODE_RANGE_NUM(ranges); + if (n == 0) goto is_null; + + bbuf = (BBuf* )xmalloc(sizeof(BBuf)); + CHECK_NULL_RETURN(bbuf); + bbuf->alloc = n + 1; + bbuf->used = n + 1; + bbuf->p = (UChar* )((void* )ranges); + + cc->mbuf = bbuf; + } + + return node; +} + +static Node* +node_new_ctype(int type, int not) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_CTYPE); + NCTYPE(node)->ctype = type; + NCTYPE(node)->not = not; + return node; +} + +static Node* +node_new_anychar(void) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_CANY); + return node; +} + +static Node* +node_new_list(Node* left, Node* right) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_LIST); + NCAR(node) = left; + NCDR(node) = right; + return node; +} + +extern Node* +onig_node_new_list(Node* left, Node* right) +{ + return node_new_list(left, right); +} + +extern Node* +onig_node_list_add(Node* list, Node* x) +{ + Node *n; + + n = onig_node_new_list(x, NULL); + if (IS_NULL(n)) return NULL_NODE; + + if (IS_NOT_NULL(list)) { + while (IS_NOT_NULL(NCDR(list))) + list = NCDR(list); + + NCDR(list) = n; + } + + return n; +} + +extern Node* +onig_node_new_alt(Node* left, Node* right) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_ALT); + NCAR(node) = left; + NCDR(node) = right; + return node; +} + +extern Node* +onig_node_new_anchor(int type) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_ANCHOR); + NANCHOR(node)->type = type; + NANCHOR(node)->target = NULL; + NANCHOR(node)->char_len = -1; + return node; +} + +static Node* +node_new_backref(int back_num, int* backrefs, int by_name, +#ifdef USE_BACKREF_WITH_LEVEL + int exist_level, int nest_level, +#endif + ScanEnv* env) +{ + int i; + Node* node = node_new(); + + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_BREF); + NBREF(node)->state = 0; + NBREF(node)->back_num = back_num; + NBREF(node)->back_dynamic = (int* )NULL; + if (by_name != 0) + NBREF(node)->state |= NST_NAME_REF; + +#ifdef USE_BACKREF_WITH_LEVEL + if (exist_level != 0) { + NBREF(node)->state |= NST_NEST_LEVEL; + NBREF(node)->nest_level = nest_level; + } +#endif + + for (i = 0; i < back_num; i++) { + if (backrefs[i] <= env->num_mem && + IS_NULL(SCANENV_MEM_NODES(env)[backrefs[i]])) { + NBREF(node)->state |= NST_RECURSION; /* /...(\1).../ */ + break; + } + } + + if (back_num <= NODE_BACKREFS_SIZE) { + for (i = 0; i < back_num; i++) + NBREF(node)->back_static[i] = backrefs[i]; + } + else { + int* p = (int* )xmalloc(sizeof(int) * back_num); + if (IS_NULL(p)) { + onig_node_free(node); + return NULL; + } + NBREF(node)->back_dynamic = p; + for (i = 0; i < back_num; i++) + p[i] = backrefs[i]; + } + return node; +} + +#ifdef USE_SUBEXP_CALL +static Node* +node_new_call(UChar* name, UChar* name_end, int gnum) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_CALL); + NCALL(node)->state = 0; + NCALL(node)->target = NULL_NODE; + NCALL(node)->name = name; + NCALL(node)->name_end = name_end; + NCALL(node)->group_num = gnum; /* call by number if gnum != 0 */ + return node; +} +#endif + +static Node* +node_new_quantifier(int lower, int upper, int by_number) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_QTFR); + NQTFR(node)->state = 0; + NQTFR(node)->target = NULL; + NQTFR(node)->lower = lower; + NQTFR(node)->upper = upper; + NQTFR(node)->greedy = 1; + NQTFR(node)->target_empty_info = NQ_TARGET_ISNOT_EMPTY; + NQTFR(node)->head_exact = NULL_NODE; + NQTFR(node)->next_head_exact = NULL_NODE; + NQTFR(node)->is_refered = 0; + if (by_number != 0) + NQTFR(node)->state |= NST_BY_NUMBER; + +#ifdef USE_COMBINATION_EXPLOSION_CHECK + NQTFR(node)->comb_exp_check_num = 0; +#endif + + return node; +} + +static Node* +node_new_enclose(int type) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_ENCLOSE); + NENCLOSE(node)->type = type; + NENCLOSE(node)->state = 0; + NENCLOSE(node)->regnum = 0; + NENCLOSE(node)->option = 0; + NENCLOSE(node)->target = NULL; + NENCLOSE(node)->call_addr = -1; + NENCLOSE(node)->opt_count = 0; + return node; +} + +extern Node* +onig_node_new_enclose(int type) +{ + return node_new_enclose(type); +} + +static Node* +node_new_enclose_memory(OnigOptionType option, int is_named) +{ + Node* node = node_new_enclose(ENCLOSE_MEMORY); + CHECK_NULL_RETURN(node); + if (is_named != 0) + SET_ENCLOSE_STATUS(node, NST_NAMED_GROUP); + +#ifdef USE_SUBEXP_CALL + NENCLOSE(node)->option = option; +#endif + return node; +} + +static Node* +node_new_option(OnigOptionType option) +{ + Node* node = node_new_enclose(ENCLOSE_OPTION); + CHECK_NULL_RETURN(node); + NENCLOSE(node)->option = option; + return node; +} + +extern int +onig_node_str_cat(Node* node, const UChar* s, const UChar* end) +{ + int addlen = end - s; + + if (addlen > 0) { + int len = NSTR(node)->end - NSTR(node)->s; + + if (NSTR(node)->capa > 0 || (len + addlen > NODE_STR_BUF_SIZE - 1)) { + UChar* p; + int capa = len + addlen + NODE_STR_MARGIN; + + if (capa <= NSTR(node)->capa) { + onig_strcpy(NSTR(node)->s + len, s, end); + } + else { + if (NSTR(node)->s == NSTR(node)->buf) + p = strcat_capa_from_static(NSTR(node)->s, NSTR(node)->end, + s, end, capa); + else + p = strcat_capa(NSTR(node)->s, NSTR(node)->end, s, end, capa); + + CHECK_NULL_RETURN_MEMERR(p); + NSTR(node)->s = p; + NSTR(node)->capa = capa; + } + } + else { + onig_strcpy(NSTR(node)->s + len, s, end); + } + NSTR(node)->end = NSTR(node)->s + len + addlen; + } + + return 0; +} + +extern int +onig_node_str_set(Node* node, const UChar* s, const UChar* end) +{ + onig_node_str_clear(node); + return onig_node_str_cat(node, s, end); +} + +static int +node_str_cat_char(Node* node, UChar c) +{ + UChar s[1]; + + s[0] = c; + return onig_node_str_cat(node, s, s + 1); +} + +extern void +onig_node_conv_to_str_node(Node* node, int flag) +{ + SET_NTYPE(node, NT_STR); + NSTR(node)->flag = flag; + NSTR(node)->capa = 0; + NSTR(node)->s = NSTR(node)->buf; + NSTR(node)->end = NSTR(node)->buf; +} + +extern void +onig_node_str_clear(Node* node) +{ + if (NSTR(node)->capa != 0 && + IS_NOT_NULL(NSTR(node)->s) && NSTR(node)->s != NSTR(node)->buf) { + xfree(NSTR(node)->s); + } + + NSTR(node)->capa = 0; + NSTR(node)->flag = 0; + NSTR(node)->s = NSTR(node)->buf; + NSTR(node)->end = NSTR(node)->buf; +} + +static Node* +node_new_str(const UChar* s, const UChar* end) +{ + Node* node = node_new(); + CHECK_NULL_RETURN(node); + + SET_NTYPE(node, NT_STR); + NSTR(node)->capa = 0; + NSTR(node)->flag = 0; + NSTR(node)->s = NSTR(node)->buf; + NSTR(node)->end = NSTR(node)->buf; + if (onig_node_str_cat(node, s, end)) { + onig_node_free(node); + return NULL; + } + return node; +} + +extern Node* +onig_node_new_str(const UChar* s, const UChar* end) +{ + return node_new_str(s, end); +} + +static Node* +node_new_str_raw(UChar* s, UChar* end) +{ + Node* node = node_new_str(s, end); + NSTRING_SET_RAW(node); + return node; +} + +static Node* +node_new_empty(void) +{ + return node_new_str(NULL, NULL); +} + +static Node* +node_new_str_raw_char(UChar c) +{ + UChar p[1]; + + p[0] = c; + return node_new_str_raw(p, p + 1); +} + +static Node* +str_node_split_last_char(StrNode* sn, OnigEncoding enc) +{ + const UChar *p; + Node* n = NULL_NODE; + + if (sn->end > sn->s) { + p = onigenc_get_prev_char_head(enc, sn->s, sn->end); + if (p && p > sn->s) { /* can be splitted. */ + n = node_new_str(p, sn->end); + if ((sn->flag & NSTR_RAW) != 0) + NSTRING_SET_RAW(n); + sn->end = (UChar* )p; + } + } + return n; +} + +static int +str_node_can_be_split(StrNode* sn, OnigEncoding enc) +{ + if (sn->end > sn->s) { + return ((enclen(enc, sn->s, sn->end) < sn->end - sn->s) ? 1 : 0); + } + return 0; +} + +#ifdef USE_PAD_TO_SHORT_BYTE_CHAR +static int +node_str_head_pad(StrNode* sn, int num, UChar val) +{ + UChar buf[NODE_STR_BUF_SIZE]; + int i, len; + + len = sn->end - sn->s; + onig_strcpy(buf, sn->s, sn->end); + onig_strcpy(&(sn->s[num]), buf, buf + len); + sn->end += num; + + for (i = 0; i < num; i++) { + sn->s[i] = val; + } +} +#endif + +extern int +onig_scan_unsigned_number(UChar** src, const UChar* end, OnigEncoding enc) +{ + unsigned int num, val; + OnigCodePoint c; + UChar* p = *src; + PFETCH_READY; + + num = 0; + while (!PEND) { + PFETCH(c); + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + val = (unsigned int )DIGITVAL(c); + if ((INT_MAX_LIMIT - val) / 10UL < num) + return -1; /* overflow */ + + num = num * 10 + val; + } + else { + PUNFETCH; + break; + } + } + *src = p; + return num; +} + +static int +scan_unsigned_hexadecimal_number(UChar** src, UChar* end, int maxlen, + OnigEncoding enc) +{ + OnigCodePoint c; + unsigned int num, val; + UChar* p = *src; + PFETCH_READY; + + num = 0; + while (!PEND && maxlen-- != 0) { + PFETCH(c); + if (ONIGENC_IS_CODE_XDIGIT(enc, c)) { + val = (unsigned int )XDIGITVAL(enc,c); + if ((INT_MAX_LIMIT - val) / 16UL < num) + return -1; /* overflow */ + + num = (num << 4) + XDIGITVAL(enc,c); + } + else { + PUNFETCH; + break; + } + } + *src = p; + return num; +} + +static int +scan_unsigned_octal_number(UChar** src, UChar* end, int maxlen, + OnigEncoding enc) +{ + OnigCodePoint c; + unsigned int num, val; + UChar* p = *src; + PFETCH_READY; + + num = 0; + while (!PEND && maxlen-- != 0) { + PFETCH(c); + if (ONIGENC_IS_CODE_DIGIT(enc, c) && c < '8') { + val = ODIGITVAL(c); + if ((INT_MAX_LIMIT - val) / 8UL < num) + return -1; /* overflow */ + + num = (num << 3) + val; + } + else { + PUNFETCH; + break; + } + } + *src = p; + return num; +} + + +#define BBUF_WRITE_CODE_POINT(bbuf,pos,code) \ + BBUF_WRITE(bbuf, pos, &(code), SIZE_CODE_POINT) + +/* data format: + [n][from-1][to-1][from-2][to-2] ... [from-n][to-n] + (all data size is OnigCodePoint) + */ +static int +new_code_range(BBuf** pbuf) +{ +#define INIT_MULTI_BYTE_RANGE_SIZE (SIZE_CODE_POINT * 5) + int r; + OnigCodePoint n; + BBuf* bbuf; + + bbuf = *pbuf = (BBuf* )xmalloc(sizeof(BBuf)); + CHECK_NULL_RETURN_MEMERR(*pbuf); + r = BBUF_INIT(*pbuf, INIT_MULTI_BYTE_RANGE_SIZE); + if (r) return r; + + n = 0; + BBUF_WRITE_CODE_POINT(bbuf, 0, n); + return 0; +} + +static int +add_code_range_to_buf(BBuf** pbuf, OnigCodePoint from, OnigCodePoint to) +{ + int r, inc_n, pos; + int low, high, bound, x; + OnigCodePoint n, *data; + BBuf* bbuf; + + if (from > to) { + n = from; from = to; to = n; + } + + if (IS_NULL(*pbuf)) { + r = new_code_range(pbuf); + if (r) return r; + bbuf = *pbuf; + n = 0; + } + else { + bbuf = *pbuf; + GET_CODE_POINT(n, bbuf->p); + } + data = (OnigCodePoint* )(bbuf->p); + data++; + + for (low = 0, bound = n; low < bound; ) { + x = (low + bound) >> 1; + if (from > data[x*2 + 1]) + low = x + 1; + else + bound = x; + } + + for (high = low, bound = n; high < bound; ) { + x = (high + bound) >> 1; + if (to >= data[x*2] - 1) + high = x + 1; + else + bound = x; + } + + inc_n = low + 1 - high; + if (n + inc_n > ONIG_MAX_MULTI_BYTE_RANGES_NUM) + return ONIGERR_TOO_MANY_MULTI_BYTE_RANGES; + + if (inc_n != 1) { + if (from > data[low*2]) + from = data[low*2]; + if (to < data[(high - 1)*2 + 1]) + to = data[(high - 1)*2 + 1]; + } + + if (inc_n != 0 && (OnigCodePoint )high < n) { + int from_pos = SIZE_CODE_POINT * (1 + high * 2); + int to_pos = SIZE_CODE_POINT * (1 + (low + 1) * 2); + int size = (n - high) * 2 * SIZE_CODE_POINT; + + if (inc_n > 0) { + BBUF_MOVE_RIGHT(bbuf, from_pos, to_pos, size); + } + else { + BBUF_MOVE_LEFT_REDUCE(bbuf, from_pos, to_pos); + } + } + + pos = SIZE_CODE_POINT * (1 + low * 2); + BBUF_ENSURE_SIZE(bbuf, pos + SIZE_CODE_POINT * 2); + BBUF_WRITE_CODE_POINT(bbuf, pos, from); + BBUF_WRITE_CODE_POINT(bbuf, pos + SIZE_CODE_POINT, to); + n += inc_n; + BBUF_WRITE_CODE_POINT(bbuf, 0, n); + + return 0; +} + +static int +add_code_range(BBuf** pbuf, ScanEnv* env, OnigCodePoint from, OnigCodePoint to) +{ + if (from > to) { + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) + return 0; + else + return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS; + } + + return add_code_range_to_buf(pbuf, from, to); +} + +static int +not_code_range_buf(OnigEncoding enc, BBuf* bbuf, BBuf** pbuf) +{ + int r, i, n; + OnigCodePoint pre, from, *data, to = 0; + + *pbuf = (BBuf* )NULL; + if (IS_NULL(bbuf)) { + set_all: + return SET_ALL_MULTI_BYTE_RANGE(enc, pbuf); + } + + data = (OnigCodePoint* )(bbuf->p); + GET_CODE_POINT(n, data); + data++; + if (n <= 0) goto set_all; + + r = 0; + pre = MBCODE_START_POS(enc); + for (i = 0; i < n; i++) { + from = data[i*2]; + to = data[i*2+1]; + if (pre <= from - 1) { + r = add_code_range_to_buf(pbuf, pre, from - 1); + if (r != 0) return r; + } + if (to == ~((OnigCodePoint )0)) break; + pre = to + 1; + } + if (to < ~((OnigCodePoint )0)) { + r = add_code_range_to_buf(pbuf, to + 1, ~((OnigCodePoint )0)); + } + return r; +} + +#define SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2) do {\ + BBuf *tbuf; \ + int tnot; \ + tnot = not1; not1 = not2; not2 = tnot; \ + tbuf = bbuf1; bbuf1 = bbuf2; bbuf2 = tbuf; \ +} while (0) + +static int +or_code_range_buf(OnigEncoding enc, BBuf* bbuf1, int not1, + BBuf* bbuf2, int not2, BBuf** pbuf) +{ + int r; + OnigCodePoint i, n1, *data1; + OnigCodePoint from, to; + + *pbuf = (BBuf* )NULL; + if (IS_NULL(bbuf1) && IS_NULL(bbuf2)) { + if (not1 != 0 || not2 != 0) + return SET_ALL_MULTI_BYTE_RANGE(enc, pbuf); + return 0; + } + + r = 0; + if (IS_NULL(bbuf2)) + SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); + + if (IS_NULL(bbuf1)) { + if (not1 != 0) { + return SET_ALL_MULTI_BYTE_RANGE(enc, pbuf); + } + else { + if (not2 == 0) { + return bbuf_clone(pbuf, bbuf2); + } + else { + return not_code_range_buf(enc, bbuf2, pbuf); + } + } + } + + if (not1 != 0) + SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); + + data1 = (OnigCodePoint* )(bbuf1->p); + GET_CODE_POINT(n1, data1); + data1++; + + if (not2 == 0 && not1 == 0) { /* 1 OR 2 */ + r = bbuf_clone(pbuf, bbuf2); + } + else if (not1 == 0) { /* 1 OR (not 2) */ + r = not_code_range_buf(enc, bbuf2, pbuf); + } + if (r != 0) return r; + + for (i = 0; i < n1; i++) { + from = data1[i*2]; + to = data1[i*2+1]; + r = add_code_range_to_buf(pbuf, from, to); + if (r != 0) return r; + } + return 0; +} + +static int +and_code_range1(BBuf** pbuf, OnigCodePoint from1, OnigCodePoint to1, + OnigCodePoint* data, int n) +{ + int i, r; + OnigCodePoint from2, to2; + + for (i = 0; i < n; i++) { + from2 = data[i*2]; + to2 = data[i*2+1]; + if (from2 < from1) { + if (to2 < from1) continue; + else { + from1 = to2 + 1; + } + } + else if (from2 <= to1) { + if (to2 < to1) { + if (from1 <= from2 - 1) { + r = add_code_range_to_buf(pbuf, from1, from2-1); + if (r != 0) return r; + } + from1 = to2 + 1; + } + else { + to1 = from2 - 1; + } + } + else { + from1 = from2; + } + if (from1 > to1) break; + } + if (from1 <= to1) { + r = add_code_range_to_buf(pbuf, from1, to1); + if (r != 0) return r; + } + return 0; +} + +static int +and_code_range_buf(BBuf* bbuf1, int not1, BBuf* bbuf2, int not2, BBuf** pbuf) +{ + int r; + OnigCodePoint i, j, n1, n2, *data1, *data2; + OnigCodePoint from, to, from1, to1, from2, to2; + + *pbuf = (BBuf* )NULL; + if (IS_NULL(bbuf1)) { + if (not1 != 0 && IS_NOT_NULL(bbuf2)) /* not1 != 0 -> not2 == 0 */ + return bbuf_clone(pbuf, bbuf2); + return 0; + } + else if (IS_NULL(bbuf2)) { + if (not2 != 0) + return bbuf_clone(pbuf, bbuf1); + return 0; + } + + if (not1 != 0) + SWAP_BBUF_NOT(bbuf1, not1, bbuf2, not2); + + data1 = (OnigCodePoint* )(bbuf1->p); + data2 = (OnigCodePoint* )(bbuf2->p); + GET_CODE_POINT(n1, data1); + GET_CODE_POINT(n2, data2); + data1++; + data2++; + + if (not2 == 0 && not1 == 0) { /* 1 AND 2 */ + for (i = 0; i < n1; i++) { + from1 = data1[i*2]; + to1 = data1[i*2+1]; + for (j = 0; j < n2; j++) { + from2 = data2[j*2]; + to2 = data2[j*2+1]; + if (from2 > to1) break; + if (to2 < from1) continue; + from = MAX(from1, from2); + to = MIN(to1, to2); + r = add_code_range_to_buf(pbuf, from, to); + if (r != 0) return r; + } + } + } + else if (not1 == 0) { /* 1 AND (not 2) */ + for (i = 0; i < n1; i++) { + from1 = data1[i*2]; + to1 = data1[i*2+1]; + r = and_code_range1(pbuf, from1, to1, data2, n2); + if (r != 0) return r; + } + } + + return 0; +} + +static int +and_cclass(CClassNode* dest, CClassNode* cc, OnigEncoding enc) +{ + int r, not1, not2; + BBuf *buf1, *buf2, *pbuf; + BitSetRef bsr1, bsr2; + BitSet bs1, bs2; + + not1 = IS_NCCLASS_NOT(dest); + bsr1 = dest->bs; + buf1 = dest->mbuf; + not2 = IS_NCCLASS_NOT(cc); + bsr2 = cc->bs; + buf2 = cc->mbuf; + + if (not1 != 0) { + bitset_invert_to(bsr1, bs1); + bsr1 = bs1; + } + if (not2 != 0) { + bitset_invert_to(bsr2, bs2); + bsr2 = bs2; + } + bitset_and(bsr1, bsr2); + if (bsr1 != dest->bs) { + bitset_copy(dest->bs, bsr1); + bsr1 = dest->bs; + } + if (not1 != 0) { + bitset_invert(dest->bs); + } + + if (! ONIGENC_IS_SINGLEBYTE(enc)) { + if (not1 != 0 && not2 != 0) { + r = or_code_range_buf(enc, buf1, 0, buf2, 0, &pbuf); + } + else { + r = and_code_range_buf(buf1, not1, buf2, not2, &pbuf); + if (r == 0 && not1 != 0) { + BBuf *tbuf; + r = not_code_range_buf(enc, pbuf, &tbuf); + if (r != 0) { + bbuf_free(pbuf); + return r; + } + bbuf_free(pbuf); + pbuf = tbuf; + } + } + if (r != 0) return r; + + dest->mbuf = pbuf; + bbuf_free(buf1); + return r; + } + return 0; +} + +static int +or_cclass(CClassNode* dest, CClassNode* cc, OnigEncoding enc) +{ + int r, not1, not2; + BBuf *buf1, *buf2, *pbuf; + BitSetRef bsr1, bsr2; + BitSet bs1, bs2; + + not1 = IS_NCCLASS_NOT(dest); + bsr1 = dest->bs; + buf1 = dest->mbuf; + not2 = IS_NCCLASS_NOT(cc); + bsr2 = cc->bs; + buf2 = cc->mbuf; + + if (not1 != 0) { + bitset_invert_to(bsr1, bs1); + bsr1 = bs1; + } + if (not2 != 0) { + bitset_invert_to(bsr2, bs2); + bsr2 = bs2; + } + bitset_or(bsr1, bsr2); + if (bsr1 != dest->bs) { + bitset_copy(dest->bs, bsr1); + bsr1 = dest->bs; + } + if (not1 != 0) { + bitset_invert(dest->bs); + } + + if (! ONIGENC_IS_SINGLEBYTE(enc)) { + if (not1 != 0 && not2 != 0) { + r = and_code_range_buf(buf1, 0, buf2, 0, &pbuf); + } + else { + r = or_code_range_buf(enc, buf1, not1, buf2, not2, &pbuf); + if (r == 0 && not1 != 0) { + BBuf *tbuf; + r = not_code_range_buf(enc, pbuf, &tbuf); + if (r != 0) { + bbuf_free(pbuf); + return r; + } + bbuf_free(pbuf); + pbuf = tbuf; + } + } + if (r != 0) return r; + + dest->mbuf = pbuf; + bbuf_free(buf1); + return r; + } + else + return 0; +} + +static int +conv_backslash_value(int c, ScanEnv* env) +{ + if (IS_SYNTAX_OP(env->syntax, ONIG_SYN_OP_ESC_CONTROL_CHARS)) { + switch (c) { + case 'n': return '\n'; + case 't': return '\t'; + case 'r': return '\r'; + case 'f': return '\f'; + case 'a': return '\007'; + case 'b': return '\010'; + case 'e': return '\033'; + case 'v': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_ESC_V_VTAB)) + return '\v'; + break; + + default: + break; + } + } + return c; +} + +static int +is_invalid_quantifier_target(Node* node) +{ + switch (NTYPE(node)) { + case NT_ANCHOR: + return 1; + break; + + case NT_ENCLOSE: + /* allow enclosed elements */ + /* return is_invalid_quantifier_target(NENCLOSE(node)->target); */ + break; + + case NT_LIST: + do { + if (! is_invalid_quantifier_target(NCAR(node))) return 0; + } while (IS_NOT_NULL(node = NCDR(node))); + return 0; + break; + + case NT_ALT: + do { + if (is_invalid_quantifier_target(NCAR(node))) return 1; + } while (IS_NOT_NULL(node = NCDR(node))); + break; + + default: + break; + } + return 0; +} + +/* ?:0, *:1, +:2, ??:3, *?:4, +?:5 */ +static int +popular_quantifier_num(QtfrNode* q) +{ + if (q->greedy) { + if (q->lower == 0) { + if (q->upper == 1) return 0; + else if (IS_REPEAT_INFINITE(q->upper)) return 1; + } + else if (q->lower == 1) { + if (IS_REPEAT_INFINITE(q->upper)) return 2; + } + } + else { + if (q->lower == 0) { + if (q->upper == 1) return 3; + else if (IS_REPEAT_INFINITE(q->upper)) return 4; + } + else if (q->lower == 1) { + if (IS_REPEAT_INFINITE(q->upper)) return 5; + } + } + return -1; +} + + +enum ReduceType { + RQ_ASIS = 0, /* as is */ + RQ_DEL = 1, /* delete parent */ + RQ_A, /* to '*' */ + RQ_AQ, /* to '*?' */ + RQ_QQ, /* to '??' */ + RQ_P_QQ, /* to '+)??' */ + RQ_PQ_Q /* to '+?)?' */ +}; + +static enum ReduceType const ReduceTypeTable[6][6] = { + {RQ_DEL, RQ_A, RQ_A, RQ_QQ, RQ_AQ, RQ_ASIS}, /* '?' */ + {RQ_DEL, RQ_DEL, RQ_DEL, RQ_P_QQ, RQ_P_QQ, RQ_DEL}, /* '*' */ + {RQ_A, RQ_A, RQ_DEL, RQ_ASIS, RQ_P_QQ, RQ_DEL}, /* '+' */ + {RQ_DEL, RQ_AQ, RQ_AQ, RQ_DEL, RQ_AQ, RQ_AQ}, /* '??' */ + {RQ_DEL, RQ_DEL, RQ_DEL, RQ_DEL, RQ_DEL, RQ_DEL}, /* '*?' */ + {RQ_ASIS, RQ_PQ_Q, RQ_DEL, RQ_AQ, RQ_AQ, RQ_DEL} /* '+?' */ +}; + +extern void +onig_reduce_nested_quantifier(Node* pnode, Node* cnode) +{ + int pnum, cnum; + QtfrNode *p, *c; + + p = NQTFR(pnode); + c = NQTFR(cnode); + pnum = popular_quantifier_num(p); + cnum = popular_quantifier_num(c); + if (pnum < 0 || cnum < 0) return ; + + switch(ReduceTypeTable[cnum][pnum]) { + case RQ_DEL: + *pnode = *cnode; + break; + case RQ_A: + p->target = c->target; + p->lower = 0; p->upper = REPEAT_INFINITE; p->greedy = 1; + break; + case RQ_AQ: + p->target = c->target; + p->lower = 0; p->upper = REPEAT_INFINITE; p->greedy = 0; + break; + case RQ_QQ: + p->target = c->target; + p->lower = 0; p->upper = 1; p->greedy = 0; + break; + case RQ_P_QQ: + p->target = cnode; + p->lower = 0; p->upper = 1; p->greedy = 0; + c->lower = 1; c->upper = REPEAT_INFINITE; c->greedy = 1; + return ; + break; + case RQ_PQ_Q: + p->target = cnode; + p->lower = 0; p->upper = 1; p->greedy = 1; + c->lower = 1; c->upper = REPEAT_INFINITE; c->greedy = 0; + return ; + break; + case RQ_ASIS: + p->target = cnode; + return ; + break; + } + + c->target = NULL_NODE; + onig_node_free(cnode); +} + + +enum TokenSyms { + TK_EOT = 0, /* end of token */ + TK_RAW_BYTE = 1, + TK_CHAR, + TK_STRING, + TK_CODE_POINT, + TK_ANYCHAR, + TK_CHAR_TYPE, + TK_BACKREF, + TK_CALL, + TK_ANCHOR, + TK_OP_REPEAT, + TK_INTERVAL, + TK_ANYCHAR_ANYTIME, /* SQL '%' == .* */ + TK_ALT, + TK_SUBEXP_OPEN, + TK_SUBEXP_CLOSE, + TK_CC_OPEN, + TK_QUOTE_OPEN, + TK_CHAR_PROPERTY, /* \p{...}, \P{...} */ + /* in cc */ + TK_CC_CLOSE, + TK_CC_RANGE, + TK_POSIX_BRACKET_OPEN, + TK_CC_AND, /* && */ + TK_CC_CC_OPEN /* [ */ +}; + +typedef struct { + enum TokenSyms type; + int escaped; + int base; /* is number: 8, 16 (used in [....]) */ + UChar* backp; + union { + UChar* s; + int c; + OnigCodePoint code; + int anchor; + int subtype; + struct { + int lower; + int upper; + int greedy; + int possessive; + } repeat; + struct { + int num; + int ref1; + int* refs; + int by_name; +#ifdef USE_BACKREF_WITH_LEVEL + int exist_level; + int level; /* \k<name+n> */ +#endif + } backref; + struct { + UChar* name; + UChar* name_end; + int gnum; + } call; + struct { + int ctype; + int not; + } prop; + } u; +} OnigToken; + + +static int +fetch_range_quantifier(UChar** src, UChar* end, OnigToken* tok, ScanEnv* env) +{ + int low, up, syn_allow, non_low = 0; + int r = 0; + OnigCodePoint c; + OnigEncoding enc = env->enc; + UChar* p = *src; + PFETCH_READY; + + syn_allow = IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_INVALID_INTERVAL); + + if (PEND) { + if (syn_allow) + return 1; /* "....{" : OK! */ + else + return ONIGERR_END_PATTERN_AT_LEFT_BRACE; /* "....{" syntax error */ + } + + if (! syn_allow) { + c = PPEEK; + if (c == ')' || c == '(' || c == '|') { + return ONIGERR_END_PATTERN_AT_LEFT_BRACE; + } + } + + low = onig_scan_unsigned_number(&p, end, env->enc); + if (low < 0) return ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; + if (low > ONIG_MAX_REPEAT_NUM) + return ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; + + if (p == *src) { /* can't read low */ + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_INTERVAL_LOW_ABBREV)) { + /* allow {,n} as {0,n} */ + low = 0; + non_low = 1; + } + else + goto invalid; + } + + if (PEND) goto invalid; + PFETCH(c); + if (c == ',') { + UChar* prev = p; + up = onig_scan_unsigned_number(&p, end, env->enc); + if (up < 0) return ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; + if (up > ONIG_MAX_REPEAT_NUM) + return ONIGERR_TOO_BIG_NUMBER_FOR_REPEAT_RANGE; + + if (p == prev) { + if (non_low != 0) + goto invalid; + up = REPEAT_INFINITE; /* {n,} : {n,infinite} */ + } + } + else { + if (non_low != 0) + goto invalid; + + PUNFETCH; + up = low; /* {n} : exact n times */ + r = 2; /* fixed */ + } + + if (PEND) goto invalid; + PFETCH(c); + if (IS_SYNTAX_OP(env->syntax, ONIG_SYN_OP_ESC_BRACE_INTERVAL)) { + if (c != MC_ESC(env->syntax)) goto invalid; + PFETCH(c); + } + if (c != '}') goto invalid; + + if (!IS_REPEAT_INFINITE(up) && low > up) { + return ONIGERR_UPPER_SMALLER_THAN_LOWER_IN_REPEAT_RANGE; + } + + tok->type = TK_INTERVAL; + tok->u.repeat.lower = low; + tok->u.repeat.upper = up; + *src = p; + return r; /* 0: normal {n,m}, 2: fixed {n} */ + + invalid: + if (syn_allow) + return 1; /* OK */ + else + return ONIGERR_INVALID_REPEAT_RANGE_PATTERN; +} + +/* \M-, \C-, \c, or \... */ +static int +fetch_escaped_value(UChar** src, UChar* end, ScanEnv* env) +{ + int v; + OnigCodePoint c; + OnigEncoding enc = env->enc; + UChar* p = *src; + PFETCH_READY; + + if (PEND) return ONIGERR_END_PATTERN_AT_ESCAPE; + + PFETCH(c); + switch (c) { + case 'M': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_ESC_CAPITAL_M_BAR_META)) { + if (PEND) return ONIGERR_END_PATTERN_AT_META; + PFETCH(c); + if (c != '-') return ONIGERR_META_CODE_SYNTAX; + if (PEND) return ONIGERR_END_PATTERN_AT_META; + PFETCH(c); + if (c == MC_ESC(env->syntax)) { + v = fetch_escaped_value(&p, end, env); + if (v < 0) return v; + c = (OnigCodePoint )v; + } + c = ((c & 0xff) | 0x80); + } + else + goto backslash; + break; + + case 'C': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_ESC_CAPITAL_C_BAR_CONTROL)) { + if (PEND) return ONIGERR_END_PATTERN_AT_CONTROL; + PFETCH(c); + if (c != '-') return ONIGERR_CONTROL_CODE_SYNTAX; + goto control; + } + else + goto backslash; + + case 'c': + if (IS_SYNTAX_OP(env->syntax, ONIG_SYN_OP_ESC_C_CONTROL)) { + control: + if (PEND) return ONIGERR_END_PATTERN_AT_CONTROL; + PFETCH(c); + if (c == '?') { + c = 0177; + } + else { + if (c == MC_ESC(env->syntax)) { + v = fetch_escaped_value(&p, end, env); + if (v < 0) return v; + c = (OnigCodePoint )v; + } + c &= 0x9f; + } + break; + } + /* fall through */ + + default: + { + backslash: + c = conv_backslash_value(c, env); + } + break; + } + + *src = p; + return c; +} + +static int fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env); + +static OnigCodePoint +get_name_end_code_point(OnigCodePoint start) +{ + switch (start) { + case '<': return (OnigCodePoint )'>'; break; + case '\'': return (OnigCodePoint )'\''; break; + default: + break; + } + + return (OnigCodePoint )0; +} + +#ifdef USE_NAMED_GROUP +#ifdef USE_BACKREF_WITH_LEVEL +/* + \k<name+n>, \k<name-n> + \k<num+n>, \k<num-n> + \k<-num+n>, \k<-num-n> +*/ +static int +fetch_name_with_level(OnigCodePoint start_code, UChar** src, UChar* end, + UChar** rname_end, ScanEnv* env, + int* rback_num, int* rlevel) +{ + int r, sign, is_num, exist_level; + OnigCodePoint end_code; + OnigCodePoint c = 0; + OnigEncoding enc = env->enc; + UChar *name_end; + UChar *pnum_head; + UChar *p = *src; + PFETCH_READY; + + *rback_num = 0; + is_num = exist_level = 0; + sign = 1; + pnum_head = *src; + + end_code = get_name_end_code_point(start_code); + + name_end = end; + r = 0; + if (PEND) { + return ONIGERR_EMPTY_GROUP_NAME; + } + else { + PFETCH(c); + if (c == end_code) + return ONIGERR_EMPTY_GROUP_NAME; + + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + is_num = 1; + } + else if (c == '-') { + is_num = 2; + sign = -1; + pnum_head = p; + } + else if (!ONIGENC_IS_CODE_WORD(enc, c)) { + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + } + + while (!PEND) { + name_end = p; + PFETCH(c); + if (c == end_code || c == ')' || c == '+' || c == '-') { + if (is_num == 2) r = ONIGERR_INVALID_GROUP_NAME; + break; + } + + if (is_num != 0) { + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + is_num = 1; + } + else { + r = ONIGERR_INVALID_GROUP_NAME; + is_num = 0; + } + } + else if (!ONIGENC_IS_CODE_WORD(enc, c)) { + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + } + + if (r == 0 && c != end_code) { + if (c == '+' || c == '-') { + int level; + int flag = (c == '-' ? -1 : 1); + + PFETCH(c); + if (! ONIGENC_IS_CODE_DIGIT(enc, c)) goto err; + PUNFETCH; + level = onig_scan_unsigned_number(&p, end, enc); + if (level < 0) return ONIGERR_TOO_BIG_NUMBER; + *rlevel = (level * flag); + exist_level = 1; + + PFETCH(c); + if (c == end_code) + goto end; + } + + err: + r = ONIGERR_INVALID_GROUP_NAME; + name_end = end; + } + + end: + if (r == 0) { + if (is_num != 0) { + *rback_num = onig_scan_unsigned_number(&pnum_head, name_end, enc); + if (*rback_num < 0) return ONIGERR_TOO_BIG_NUMBER; + else if (*rback_num == 0) goto err; + + *rback_num *= sign; + } + + *rname_end = name_end; + *src = p; + return (exist_level ? 1 : 0); + } + else { + onig_scan_env_set_error_string(env, r, *src, name_end); + return r; + } +} +#endif /* USE_BACKREF_WITH_LEVEL */ + +/* + def: 0 -> define name (don't allow number name) + 1 -> reference name (allow number name) +*/ +static int +fetch_name(OnigCodePoint start_code, UChar** src, UChar* end, + UChar** rname_end, ScanEnv* env, int* rback_num, int ref) +{ + int r, is_num, sign; + OnigCodePoint end_code; + OnigCodePoint c = 0; + OnigEncoding enc = env->enc; + UChar *name_end; + UChar *pnum_head; + UChar *p = *src; + PFETCH_READY; + + *rback_num = 0; + + end_code = get_name_end_code_point(start_code); + + name_end = end; + pnum_head = *src; + r = 0; + is_num = 0; + sign = 1; + if (PEND) { + return ONIGERR_EMPTY_GROUP_NAME; + } + else { + PFETCH(c); + if (c == end_code) + return ONIGERR_EMPTY_GROUP_NAME; + + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + if (ref == 1) + is_num = 1; + else { + r = ONIGERR_INVALID_GROUP_NAME; + is_num = 0; + } + } + else if (c == '-') { + if (ref == 1) { + is_num = 2; + sign = -1; + pnum_head = p; + } + else { + r = ONIGERR_INVALID_GROUP_NAME; + is_num = 0; + } + } + else if (!ONIGENC_IS_CODE_WORD(enc, c)) { + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + } + + if (r == 0) { + while (!PEND) { + name_end = p; + PFETCH(c); + if (c == end_code || c == ')') { + if (is_num == 2) r = ONIGERR_INVALID_GROUP_NAME; + break; + } + + if (is_num != 0) { + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + is_num = 1; + } + else { + if (!ONIGENC_IS_CODE_WORD(enc, c)) + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + else + r = ONIGERR_INVALID_GROUP_NAME; + + is_num = 0; + } + } + else { + if (!ONIGENC_IS_CODE_WORD(enc, c)) { + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + } + } + + if (c != end_code) { + r = ONIGERR_INVALID_GROUP_NAME; + name_end = end; + } + + if (is_num != 0) { + *rback_num = onig_scan_unsigned_number(&pnum_head, name_end, enc); + if (*rback_num < 0) return ONIGERR_TOO_BIG_NUMBER; + else if (*rback_num == 0) { + r = ONIGERR_INVALID_GROUP_NAME; + goto err; + } + + *rback_num *= sign; + } + + *rname_end = name_end; + *src = p; + return 0; + } + else { + while (!PEND) { + name_end = p; + PFETCH(c); + if (c == end_code || c == ')') + break; + } + if (PEND) + name_end = end; + + err: + onig_scan_env_set_error_string(env, r, *src, name_end); + return r; + } +} +#else +static int +fetch_name(OnigCodePoint start_code, UChar** src, UChar* end, + UChar** rname_end, ScanEnv* env, int* rback_num, int ref) +{ + int r, is_num, sign; + OnigCodePoint end_code; + OnigCodePoint c = 0; + UChar *name_end; + OnigEncoding enc = env->enc; + UChar *pnum_head; + UChar *p = *src; + PFETCH_READY; + + *rback_num = 0; + + end_code = get_name_end_code_point(start_code); + + *rname_end = name_end = end; + r = 0; + pnum_head = *src; + is_num = 0; + sign = 1; + + if (PEND) { + return ONIGERR_EMPTY_GROUP_NAME; + } + else { + PFETCH(c); + if (c == end_code) + return ONIGERR_EMPTY_GROUP_NAME; + + if (ONIGENC_IS_CODE_DIGIT(enc, c)) { + is_num = 1; + } + else if (c == '-') { + is_num = 2; + sign = -1; + pnum_head = p; + } + else { + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + } + + while (!PEND) { + name_end = p; + + PFETCH(c); + if (c == end_code || c == ')') break; + if (! ONIGENC_IS_CODE_DIGIT(enc, c)) + r = ONIGERR_INVALID_CHAR_IN_GROUP_NAME; + } + if (r == 0 && c != end_code) { + r = ONIGERR_INVALID_GROUP_NAME; + name_end = end; + } + + if (r == 0) { + *rback_num = onig_scan_unsigned_number(&pnum_head, name_end, enc); + if (*rback_num < 0) return ONIGERR_TOO_BIG_NUMBER; + else if (*rback_num == 0) { + r = ONIGERR_INVALID_GROUP_NAME; + goto err; + } + *rback_num *= sign; + + *rname_end = name_end; + *src = p; + return 0; + } + else { + err: + onig_scan_env_set_error_string(env, r, *src, name_end); + return r; + } +} +#endif /* USE_NAMED_GROUP */ + +static void +CC_ESC_WARN(ScanEnv* env, UChar *c) +{ + if (onig_warn == onig_null_warn) return ; + + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_WARN_CC_OP_NOT_ESCAPED) && + IS_SYNTAX_BV(env->syntax, ONIG_SYN_BACKSLASH_ESCAPE_IN_CC)) { + UChar buf[WARN_BUFSIZE]; + onig_snprintf_with_pattern(buf, WARN_BUFSIZE, env->enc, + env->pattern, env->pattern_end, + (UChar* )"character class has '%s' without escape", c); + (*onig_warn)((char* )buf); + } +} + +static void +CLOSE_BRACKET_WITHOUT_ESC_WARN(ScanEnv* env, UChar* c) +{ + if (onig_warn == onig_null_warn) return ; + + if (IS_SYNTAX_BV((env)->syntax, ONIG_SYN_WARN_CC_OP_NOT_ESCAPED)) { + UChar buf[WARN_BUFSIZE]; + onig_snprintf_with_pattern(buf, WARN_BUFSIZE, (env)->enc, + (env)->pattern, (env)->pattern_end, + (UChar* )"regular expression has '%s' without escape", c); + (*onig_warn)((char* )buf); + } +} + +static UChar* +find_str_position(OnigCodePoint s[], int n, UChar* from, UChar* to, + UChar **next, OnigEncoding enc) +{ + int i; + OnigCodePoint x; + UChar *q; + UChar *p = from; + + while (p < to) { + x = ONIGENC_MBC_TO_CODE(enc, p, to); + q = p + enclen(enc, p, to); + if (x == s[0]) { + for (i = 1; i < n && q < to; i++) { + x = ONIGENC_MBC_TO_CODE(enc, q, to); + if (x != s[i]) break; + q += enclen(enc, q, to); + } + if (i >= n) { + if (IS_NOT_NULL(next)) + *next = q; + return p; + } + } + p = q; + } + return NULL_UCHARP; +} + +static int +str_exist_check_with_esc(OnigCodePoint s[], int n, UChar* from, UChar* to, + OnigCodePoint bad, OnigEncoding enc, const OnigSyntaxType* syn) +{ + int i, in_esc; + OnigCodePoint x; + UChar *q; + UChar *p = from; + + in_esc = 0; + while (p < to) { + if (in_esc) { + in_esc = 0; + p += enclen(enc, p, to); + } + else { + x = ONIGENC_MBC_TO_CODE(enc, p, to); + q = p + enclen(enc, p, to); + if (x == s[0]) { + for (i = 1; i < n && q < to; i++) { + x = ONIGENC_MBC_TO_CODE(enc, q, to); + if (x != s[i]) break; + q += enclen(enc, q, to); + } + if (i >= n) return 1; + p += enclen(enc, p, to); + } + else { + x = ONIGENC_MBC_TO_CODE(enc, p, to); + if (x == bad) return 0; + else if (x == MC_ESC(syn)) in_esc = 1; + p = q; + } + } + } + return 0; +} + +static int +fetch_token_in_cc(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env) +{ + int num; + OnigCodePoint c, c2; + const OnigSyntaxType* syn = env->syntax; + OnigEncoding enc = env->enc; + UChar* prev; + UChar* p = *src; + PFETCH_READY; + + if (PEND) { + tok->type = TK_EOT; + return tok->type; + } + + PFETCH(c); + tok->type = TK_CHAR; + tok->base = 0; + tok->u.c = c; + tok->escaped = 0; + + if (c == ']') { + tok->type = TK_CC_CLOSE; + } + else if (c == '-') { + tok->type = TK_CC_RANGE; + } + else if (c == MC_ESC(syn)) { + if (! IS_SYNTAX_BV(syn, ONIG_SYN_BACKSLASH_ESCAPE_IN_CC)) + goto end; + + if (PEND) return ONIGERR_END_PATTERN_AT_ESCAPE; + + PFETCH(c); + tok->escaped = 1; + tok->u.c = c; + switch (c) { + case 'w': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_WORD; + tok->u.prop.not = 0; + break; + case 'W': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_WORD; + tok->u.prop.not = 1; + break; + case 'd': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_DIGIT; + tok->u.prop.not = 0; + break; + case 'D': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_DIGIT; + tok->u.prop.not = 1; + break; + case 's': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_SPACE; + tok->u.prop.not = 0; + break; + case 'S': + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_SPACE; + tok->u.prop.not = 1; + break; + case 'h': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_H_XDIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_XDIGIT; + tok->u.prop.not = 0; + break; + case 'H': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_H_XDIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_XDIGIT; + tok->u.prop.not = 1; + break; + + case 'p': + case 'P': + c2 = PPEEK; + if (c2 == '{' && + IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY)) { + PINC; + tok->type = TK_CHAR_PROPERTY; + tok->u.prop.not = (c == 'P' ? 1 : 0); + + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT)) { + PFETCH(c2); + if (c2 == '^') { + tok->u.prop.not = (tok->u.prop.not == 0 ? 1 : 0); + } + else + PUNFETCH; + } + } + break; + + case 'x': + if (PEND) break; + + prev = p; + if (PPEEK_IS('{') && IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_X_BRACE_HEX8)) { + PINC; + num = scan_unsigned_hexadecimal_number(&p, end, 8, enc); + if (num < 0) return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE; + if (!PEND) { + c2 = PPEEK; + if (ONIGENC_IS_CODE_XDIGIT(enc, c2)) + return ONIGERR_TOO_LONG_WIDE_CHAR_VALUE; + } + + if (p > prev + enclen(enc, prev, end) && !PEND && (PPEEK_IS('}'))) { + PINC; + tok->type = TK_CODE_POINT; + tok->base = 16; + tok->u.code = (OnigCodePoint )num; + } + else { + /* can't read nothing or invalid format */ + p = prev; + } + } + else if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_X_HEX2)) { + num = scan_unsigned_hexadecimal_number(&p, end, 2, enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_RAW_BYTE; + tok->base = 16; + tok->u.c = num; + } + break; + + case 'u': + if (PEND) break; + + prev = p; + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_U_HEX4)) { + num = scan_unsigned_hexadecimal_number(&p, end, 4, enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_CODE_POINT; + tok->base = 16; + tok->u.code = (OnigCodePoint )num; + } + break; + + case '0': + case '1': case '2': case '3': case '4': case '5': case '6': case '7': + if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_OCTAL3)) { + PUNFETCH; + prev = p; + num = scan_unsigned_octal_number(&p, end, 3, enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_RAW_BYTE; + tok->base = 8; + tok->u.c = num; + } + break; + + default: + PUNFETCH; + num = fetch_escaped_value(&p, end, env); + if (num < 0) return num; + if (tok->u.c != num) { + tok->u.code = (OnigCodePoint )num; + tok->type = TK_CODE_POINT; + } + break; + } + } + else if (c == '[') { + if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_POSIX_BRACKET) && (PPEEK_IS(':'))) { + OnigCodePoint send[] = { (OnigCodePoint )':', (OnigCodePoint )']' }; + tok->backp = p; /* point at '[' is readed */ + PINC; + if (str_exist_check_with_esc(send, 2, p, end, + (OnigCodePoint )']', enc, syn)) { + tok->type = TK_POSIX_BRACKET_OPEN; + } + else { + PUNFETCH; + goto cc_in_cc; + } + } + else { + cc_in_cc: + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_CCLASS_SET_OP)) { + tok->type = TK_CC_CC_OPEN; + } + else { + CC_ESC_WARN(env, (UChar* )"["); + } + } + } + else if (c == '&') { + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_CCLASS_SET_OP) && + !PEND && (PPEEK_IS('&'))) { + PINC; + tok->type = TK_CC_AND; + } + } + + end: + *src = p; + return tok->type; +} + +static int +fetch_token(OnigToken* tok, UChar** src, UChar* end, ScanEnv* env) +{ + int r, num; + OnigCodePoint c; + OnigEncoding enc = env->enc; + const OnigSyntaxType* syn = env->syntax; + UChar* prev; + UChar* p = *src; + PFETCH_READY; + + start: + if (PEND) { + tok->type = TK_EOT; + return tok->type; + } + + tok->type = TK_STRING; + tok->base = 0; + tok->backp = p; + + PFETCH(c); + if (IS_MC_ESC_CODE(c, syn)) { + if (PEND) return ONIGERR_END_PATTERN_AT_ESCAPE; + + tok->backp = p; + PFETCH(c); + + tok->u.c = c; + tok->escaped = 1; + switch (c) { + case '*': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_ASTERISK_ZERO_INF)) break; + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 0; + tok->u.repeat.upper = REPEAT_INFINITE; + goto greedy_check; + break; + + case '+': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_PLUS_ONE_INF)) break; + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 1; + tok->u.repeat.upper = REPEAT_INFINITE; + goto greedy_check; + break; + + case '?': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_QMARK_ZERO_ONE)) break; + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 0; + tok->u.repeat.upper = 1; + greedy_check: + if (!PEND && PPEEK_IS('?') && + IS_SYNTAX_OP(syn, ONIG_SYN_OP_QMARK_NON_GREEDY)) { + PFETCH(c); + tok->u.repeat.greedy = 0; + tok->u.repeat.possessive = 0; + } + else { + possessive_check: + if (!PEND && PPEEK_IS('+') && + ((IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_PLUS_POSSESSIVE_REPEAT) && + tok->type != TK_INTERVAL) || + (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_PLUS_POSSESSIVE_INTERVAL) && + tok->type == TK_INTERVAL))) { + PFETCH(c); + tok->u.repeat.greedy = 1; + tok->u.repeat.possessive = 1; + } + else { + tok->u.repeat.greedy = 1; + tok->u.repeat.possessive = 0; + } + } + break; + + case '{': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_BRACE_INTERVAL)) break; + r = fetch_range_quantifier(&p, end, tok, env); + if (r < 0) return r; /* error */ + if (r == 0) goto greedy_check; + else if (r == 2) { /* {n} */ + if (IS_SYNTAX_BV(syn, ONIG_SYN_FIXED_INTERVAL_IS_GREEDY_ONLY)) + goto possessive_check; + + goto greedy_check; + } + /* r == 1 : normal char */ + break; + + case '|': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_VBAR_ALT)) break; + tok->type = TK_ALT; + break; + + case '(': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_LPAREN_SUBEXP)) break; + tok->type = TK_SUBEXP_OPEN; + break; + + case ')': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_LPAREN_SUBEXP)) break; + tok->type = TK_SUBEXP_CLOSE; + break; + + case 'w': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_W_WORD)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_WORD; + tok->u.prop.not = 0; + break; + + case 'W': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_W_WORD)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_WORD; + tok->u.prop.not = 1; + break; + + case 'b': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_B_WORD_BOUND)) break; + tok->type = TK_ANCHOR; + tok->u.anchor = ANCHOR_WORD_BOUND; + break; + + case 'B': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_B_WORD_BOUND)) break; + tok->type = TK_ANCHOR; + tok->u.anchor = ANCHOR_NOT_WORD_BOUND; + break; + +#ifdef USE_WORD_BEGIN_END + case '<': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END)) break; + tok->type = TK_ANCHOR; + tok->u.anchor = ANCHOR_WORD_BEGIN; + break; + + case '>': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END)) break; + tok->type = TK_ANCHOR; + tok->u.anchor = ANCHOR_WORD_END; + break; +#endif + + case 's': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_S_WHITE_SPACE)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_SPACE; + tok->u.prop.not = 0; + break; + + case 'S': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_S_WHITE_SPACE)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_SPACE; + tok->u.prop.not = 1; + break; + + case 'd': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_D_DIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_DIGIT; + tok->u.prop.not = 0; + break; + + case 'D': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_D_DIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_DIGIT; + tok->u.prop.not = 1; + break; + + case 'h': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_H_XDIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_XDIGIT; + tok->u.prop.not = 0; + break; + + case 'H': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_H_XDIGIT)) break; + tok->type = TK_CHAR_TYPE; + tok->u.prop.ctype = ONIGENC_CTYPE_XDIGIT; + tok->u.prop.not = 1; + break; + + case 'A': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_AZ_BUF_ANCHOR)) break; + begin_buf: + tok->type = TK_ANCHOR; + tok->u.subtype = ANCHOR_BEGIN_BUF; + break; + + case 'Z': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_AZ_BUF_ANCHOR)) break; + tok->type = TK_ANCHOR; + tok->u.subtype = ANCHOR_SEMI_END_BUF; + break; + + case 'z': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_AZ_BUF_ANCHOR)) break; + end_buf: + tok->type = TK_ANCHOR; + tok->u.subtype = ANCHOR_END_BUF; + break; + + case 'G': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_CAPITAL_G_BEGIN_ANCHOR)) break; + tok->type = TK_ANCHOR; + tok->u.subtype = ANCHOR_BEGIN_POSITION; + break; + + case '`': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_GNU_BUF_ANCHOR)) break; + goto begin_buf; + break; + + case '\'': + if (! IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_GNU_BUF_ANCHOR)) break; + goto end_buf; + break; + + case 'x': + if (PEND) break; + + prev = p; + if (PPEEK_IS('{') && IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_X_BRACE_HEX8)) { + PINC; + num = scan_unsigned_hexadecimal_number(&p, end, 8, enc); + if (num < 0) return ONIGERR_TOO_BIG_WIDE_CHAR_VALUE; + if (!PEND) { + if (ONIGENC_IS_CODE_XDIGIT(enc, PPEEK)) + return ONIGERR_TOO_LONG_WIDE_CHAR_VALUE; + } + + if ((p > prev + enclen(enc, prev, end)) && !PEND && PPEEK_IS('}')) { + PINC; + tok->type = TK_CODE_POINT; + tok->u.code = (OnigCodePoint )num; + } + else { + /* can't read nothing or invalid format */ + p = prev; + } + } + else if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_X_HEX2)) { + num = scan_unsigned_hexadecimal_number(&p, end, 2, enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_RAW_BYTE; + tok->base = 16; + tok->u.c = num; + } + break; + + case 'u': + if (PEND) break; + + prev = p; + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_U_HEX4)) { + num = scan_unsigned_hexadecimal_number(&p, end, 4, enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_CODE_POINT; + tok->base = 16; + tok->u.code = (OnigCodePoint )num; + } + break; + + case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + PUNFETCH; + prev = p; + num = onig_scan_unsigned_number(&p, end, enc); + if (num < 0 || num > ONIG_MAX_BACKREF_NUM) { + goto skip_backref; + } + + if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_DECIMAL_BACKREF) && + (num <= env->num_mem || num <= 9)) { /* This spec. from GNU regex */ + if (IS_SYNTAX_BV(syn, ONIG_SYN_STRICT_CHECK_BACKREF)) { + if (num > env->num_mem || IS_NULL(SCANENV_MEM_NODES(env)[num])) + return ONIGERR_INVALID_BACKREF; + } + + tok->type = TK_BACKREF; + tok->u.backref.num = 1; + tok->u.backref.ref1 = num; + tok->u.backref.by_name = 0; +#ifdef USE_BACKREF_WITH_LEVEL + tok->u.backref.exist_level = 0; +#endif + break; + } + + skip_backref: + if (c == '8' || c == '9') { + /* normal char */ + p = prev; PINC; + break; + } + + p = prev; + /* fall through */ + case '0': + if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_ESC_OCTAL3)) { + prev = p; + num = scan_unsigned_octal_number(&p, end, (c == '0' ? 2:3), enc); + if (num < 0) return ONIGERR_TOO_BIG_NUMBER; + if (p == prev) { /* can't read nothing. */ + num = 0; /* but, it's not error */ + } + tok->type = TK_RAW_BYTE; + tok->base = 8; + tok->u.c = num; + } + else if (c != '0') { + PINC; + } + break; + +#ifdef USE_NAMED_GROUP + case 'k': + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_K_NAMED_BACKREF)) { + PFETCH(c); + if (c == '<' || c == '\'') { + UChar* name_end; + int* backs; + int back_num; + + prev = p; + +#ifdef USE_BACKREF_WITH_LEVEL + name_end = NULL_UCHARP; /* no need. escape gcc warning. */ + r = fetch_name_with_level((OnigCodePoint )c, &p, end, &name_end, + env, &back_num, &tok->u.backref.level); + if (r == 1) tok->u.backref.exist_level = 1; + else tok->u.backref.exist_level = 0; +#else + r = fetch_name(&p, end, &name_end, env, &back_num, 1); +#endif + if (r < 0) return r; + + if (back_num != 0) { + if (back_num < 0) { + back_num = BACKREF_REL_TO_ABS(back_num, env); + if (back_num <= 0) + return ONIGERR_INVALID_BACKREF; + } + + if (IS_SYNTAX_BV(syn, ONIG_SYN_STRICT_CHECK_BACKREF)) { + if (back_num > env->num_mem || + IS_NULL(SCANENV_MEM_NODES(env)[back_num])) + return ONIGERR_INVALID_BACKREF; + } + tok->type = TK_BACKREF; + tok->u.backref.by_name = 0; + tok->u.backref.num = 1; + tok->u.backref.ref1 = back_num; + } + else { + num = onig_name_to_group_numbers(env->reg, prev, name_end, &backs); + if (num <= 0) { + onig_scan_env_set_error_string(env, + ONIGERR_UNDEFINED_NAME_REFERENCE, prev, name_end); + return ONIGERR_UNDEFINED_NAME_REFERENCE; + } + if (IS_SYNTAX_BV(syn, ONIG_SYN_STRICT_CHECK_BACKREF)) { + int i; + for (i = 0; i < num; i++) { + if (backs[i] > env->num_mem || + IS_NULL(SCANENV_MEM_NODES(env)[backs[i]])) + return ONIGERR_INVALID_BACKREF; + } + } + + tok->type = TK_BACKREF; + tok->u.backref.by_name = 1; + if (num == 1) { + tok->u.backref.num = 1; + tok->u.backref.ref1 = backs[0]; + } + else { + tok->u.backref.num = num; + tok->u.backref.refs = backs; + } + } + } + else + PUNFETCH; + } + break; +#endif + +#ifdef USE_SUBEXP_CALL + case 'g': + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_G_SUBEXP_CALL)) { + PFETCH(c); + if (c == '<' || c == '\'') { + int gnum; + UChar* name_end; + + prev = p; + r = fetch_name((OnigCodePoint )c, &p, end, &name_end, env, &gnum, 1); + if (r < 0) return r; + + tok->type = TK_CALL; + tok->u.call.name = prev; + tok->u.call.name_end = name_end; + tok->u.call.gnum = gnum; + } + else + PUNFETCH; + } + break; +#endif + + case 'Q': + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_CAPITAL_Q_QUOTE)) { + tok->type = TK_QUOTE_OPEN; + } + break; + + case 'p': + case 'P': + if (PPEEK_IS('{') && + IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CHAR_PROPERTY)) { + PINC; + tok->type = TK_CHAR_PROPERTY; + tok->u.prop.not = (c == 'P' ? 1 : 0); + + if (IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_ESC_P_BRACE_CIRCUMFLEX_NOT)) { + PFETCH(c); + if (c == '^') { + tok->u.prop.not = (tok->u.prop.not == 0 ? 1 : 0); + } + else + PUNFETCH; + } + } + break; + + default: + PUNFETCH; + num = fetch_escaped_value(&p, end, env); + if (num < 0) return num; + /* set_raw: */ + if (tok->u.c != num) { + tok->type = TK_CODE_POINT; + tok->u.code = (OnigCodePoint )num; + } + else { /* string */ + p = tok->backp + enclen(enc, tok->backp, end); + } + break; + } + } + else { + tok->u.c = c; + tok->escaped = 0; + +#ifdef USE_VARIABLE_META_CHARS + if ((c != ONIG_INEFFECTIVE_META_CHAR) && + IS_SYNTAX_OP(syn, ONIG_SYN_OP_VARIABLE_META_CHARACTERS)) { + if (c == MC_ANYCHAR(syn)) + goto any_char; + else if (c == MC_ANYTIME(syn)) + goto anytime; + else if (c == MC_ZERO_OR_ONE_TIME(syn)) + goto zero_or_one_time; + else if (c == MC_ONE_OR_MORE_TIME(syn)) + goto one_or_more_time; + else if (c == MC_ANYCHAR_ANYTIME(syn)) { + tok->type = TK_ANYCHAR_ANYTIME; + goto out; + } + } +#endif + + switch (c) { + case '.': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_DOT_ANYCHAR)) break; +#ifdef USE_VARIABLE_META_CHARS + any_char: +#endif + tok->type = TK_ANYCHAR; + break; + + case '*': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_ASTERISK_ZERO_INF)) break; +#ifdef USE_VARIABLE_META_CHARS + anytime: +#endif + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 0; + tok->u.repeat.upper = REPEAT_INFINITE; + goto greedy_check; + break; + + case '+': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_PLUS_ONE_INF)) break; +#ifdef USE_VARIABLE_META_CHARS + one_or_more_time: +#endif + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 1; + tok->u.repeat.upper = REPEAT_INFINITE; + goto greedy_check; + break; + + case '?': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_QMARK_ZERO_ONE)) break; +#ifdef USE_VARIABLE_META_CHARS + zero_or_one_time: +#endif + tok->type = TK_OP_REPEAT; + tok->u.repeat.lower = 0; + tok->u.repeat.upper = 1; + goto greedy_check; + break; + + case '{': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_BRACE_INTERVAL)) break; + r = fetch_range_quantifier(&p, end, tok, env); + if (r < 0) return r; /* error */ + if (r == 0) goto greedy_check; + else if (r == 2) { /* {n} */ + if (IS_SYNTAX_BV(syn, ONIG_SYN_FIXED_INTERVAL_IS_GREEDY_ONLY)) + goto possessive_check; + + goto greedy_check; + } + /* r == 1 : normal char */ + break; + + case '|': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_VBAR_ALT)) break; + tok->type = TK_ALT; + break; + + case '(': + if (PPEEK_IS('?') && + IS_SYNTAX_OP2(syn, ONIG_SYN_OP2_QMARK_GROUP_EFFECT)) { + PINC; + if (PPEEK_IS('#')) { + PFETCH(c); + while (1) { + if (PEND) return ONIGERR_END_PATTERN_IN_GROUP; + PFETCH(c); + if (c == MC_ESC(syn)) { + if (!PEND) PFETCH(c); + } + else { + if (c == ')') break; + } + } + goto start; + } + PUNFETCH; + } + + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_LPAREN_SUBEXP)) break; + tok->type = TK_SUBEXP_OPEN; + break; + + case ')': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_LPAREN_SUBEXP)) break; + tok->type = TK_SUBEXP_CLOSE; + break; + + case '^': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_LINE_ANCHOR)) break; + tok->type = TK_ANCHOR; + tok->u.subtype = (IS_SINGLELINE(env->option) + ? ANCHOR_BEGIN_BUF : ANCHOR_BEGIN_LINE); + break; + + case '$': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_LINE_ANCHOR)) break; + tok->type = TK_ANCHOR; + tok->u.subtype = (IS_SINGLELINE(env->option) + ? ANCHOR_SEMI_END_BUF : ANCHOR_END_LINE); + break; + + case '[': + if (! IS_SYNTAX_OP(syn, ONIG_SYN_OP_BRACKET_CC)) break; + tok->type = TK_CC_OPEN; + break; + + case ']': + if (*src > env->pattern) /* /].../ is allowed. */ + CLOSE_BRACKET_WITHOUT_ESC_WARN(env, (UChar* )"]"); + break; + + case '#': + if (IS_EXTEND(env->option)) { + while (!PEND) { + PFETCH(c); + if (ONIGENC_IS_CODE_NEWLINE(enc, c)) + break; + } + goto start; + break; + } + break; + + case ' ': case '\t': case '\n': case '\r': case '\f': + if (IS_EXTEND(env->option)) + goto start; + break; + + default: + /* string */ + break; + } + } + +#ifdef USE_VARIABLE_META_CHARS + out: +#endif + *src = p; + return tok->type; +} + +static int +add_ctype_to_cc_by_range(CClassNode* cc, int ctype ARG_UNUSED, int not, + OnigEncoding enc ARG_UNUSED, + OnigCodePoint sb_out, const OnigCodePoint mbr[]) +{ + int i, r; + OnigCodePoint j; + + int n = ONIGENC_CODE_RANGE_NUM(mbr); + + if (not == 0) { + for (i = 0; i < n; i++) { + for (j = ONIGENC_CODE_RANGE_FROM(mbr, i); + j <= ONIGENC_CODE_RANGE_TO(mbr, i); j++) { + if (j >= sb_out) { + if (j == ONIGENC_CODE_RANGE_TO(mbr, i)) i++; + else if (j > ONIGENC_CODE_RANGE_FROM(mbr, i)) { + r = add_code_range_to_buf(&(cc->mbuf), j, + ONIGENC_CODE_RANGE_TO(mbr, i)); + if (r != 0) return r; + i++; + } + + goto sb_end; + } + BITSET_SET_BIT(cc->bs, j); + } + } + + sb_end: + for ( ; i < n; i++) { + r = add_code_range_to_buf(&(cc->mbuf), + ONIGENC_CODE_RANGE_FROM(mbr, i), + ONIGENC_CODE_RANGE_TO(mbr, i)); + if (r != 0) return r; + } + } + else { + OnigCodePoint prev = 0; + + for (i = 0; i < n; i++) { + for (j = prev; + j < ONIGENC_CODE_RANGE_FROM(mbr, i); j++) { + if (j >= sb_out) { + goto sb_end2; + } + BITSET_SET_BIT(cc->bs, j); + } + prev = ONIGENC_CODE_RANGE_TO(mbr, i) + 1; + } + for (j = prev; j < sb_out; j++) { + BITSET_SET_BIT(cc->bs, j); + } + + sb_end2: + prev = sb_out; + + for (i = 0; i < n; i++) { + if (prev < ONIGENC_CODE_RANGE_FROM(mbr, i)) { + r = add_code_range_to_buf(&(cc->mbuf), prev, + ONIGENC_CODE_RANGE_FROM(mbr, i) - 1); + if (r != 0) return r; + } + prev = ONIGENC_CODE_RANGE_TO(mbr, i) + 1; + } + if (prev < 0x7fffffff) { + r = add_code_range_to_buf(&(cc->mbuf), prev, 0x7fffffff); + if (r != 0) return r; + } + } + + return 0; +} + +static int +add_ctype_to_cc(CClassNode* cc, int ctype, int not, ScanEnv* env) +{ + int c, r; + const OnigCodePoint *ranges; + OnigCodePoint sb_out; + OnigEncoding enc = env->enc; + + r = ONIGENC_GET_CTYPE_CODE_RANGE(enc, ctype, &sb_out, &ranges); + if (r == 0) { + return add_ctype_to_cc_by_range(cc, ctype, not, env->enc, sb_out, ranges); + } + else if (r != ONIG_NO_SUPPORT_CONFIG) { + return r; + } + + r = 0; + switch (ctype) { + case ONIGENC_CTYPE_ALPHA: + case ONIGENC_CTYPE_BLANK: + case ONIGENC_CTYPE_CNTRL: + case ONIGENC_CTYPE_DIGIT: + case ONIGENC_CTYPE_LOWER: + case ONIGENC_CTYPE_PUNCT: + case ONIGENC_CTYPE_SPACE: + case ONIGENC_CTYPE_UPPER: + case ONIGENC_CTYPE_XDIGIT: + case ONIGENC_CTYPE_ASCII: + case ONIGENC_CTYPE_ALNUM: + if (not != 0) { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if (! ONIGENC_IS_CODE_CTYPE(enc, (OnigCodePoint )c, ctype)) + BITSET_SET_BIT(cc->bs, c); + } + ADD_ALL_MULTI_BYTE_RANGE(enc, cc->mbuf); + } + else { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if (ONIGENC_IS_CODE_CTYPE(enc, (OnigCodePoint )c, ctype)) + BITSET_SET_BIT(cc->bs, c); + } + } + break; + + case ONIGENC_CTYPE_GRAPH: + case ONIGENC_CTYPE_PRINT: + if (not != 0) { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if (! ONIGENC_IS_CODE_CTYPE(enc, (OnigCodePoint )c, ctype)) + BITSET_SET_BIT(cc->bs, c); + } + } + else { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if (ONIGENC_IS_CODE_CTYPE(enc, (OnigCodePoint )c, ctype)) + BITSET_SET_BIT(cc->bs, c); + } + ADD_ALL_MULTI_BYTE_RANGE(enc, cc->mbuf); + } + break; + + case ONIGENC_CTYPE_WORD: + if (not == 0) { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if (IS_CODE_SB_WORD(enc, c)) BITSET_SET_BIT(cc->bs, c); + } + ADD_ALL_MULTI_BYTE_RANGE(enc, cc->mbuf); + } + else { + for (c = 0; c < SINGLE_BYTE_SIZE; c++) { + if ((ONIGENC_CODE_TO_MBCLEN(enc, c) > 0) /* check invalid code point */ + && ! ONIGENC_IS_CODE_WORD(enc, c)) + BITSET_SET_BIT(cc->bs, c); + } + } + break; + + default: + return ONIGERR_PARSER_BUG; + break; + } + + return r; +} + +static int +parse_posix_bracket(CClassNode* cc, UChar** src, UChar* end, ScanEnv* env) +{ +#define POSIX_BRACKET_CHECK_LIMIT_LENGTH 20 +#define POSIX_BRACKET_NAME_MIN_LEN 4 + + static const PosixBracketEntryType PBS[] = { + { (UChar* )"alnum", ONIGENC_CTYPE_ALNUM, 5 }, + { (UChar* )"alpha", ONIGENC_CTYPE_ALPHA, 5 }, + { (UChar* )"blank", ONIGENC_CTYPE_BLANK, 5 }, + { (UChar* )"cntrl", ONIGENC_CTYPE_CNTRL, 5 }, + { (UChar* )"digit", ONIGENC_CTYPE_DIGIT, 5 }, + { (UChar* )"graph", ONIGENC_CTYPE_GRAPH, 5 }, + { (UChar* )"lower", ONIGENC_CTYPE_LOWER, 5 }, + { (UChar* )"print", ONIGENC_CTYPE_PRINT, 5 }, + { (UChar* )"punct", ONIGENC_CTYPE_PUNCT, 5 }, + { (UChar* )"space", ONIGENC_CTYPE_SPACE, 5 }, + { (UChar* )"upper", ONIGENC_CTYPE_UPPER, 5 }, + { (UChar* )"xdigit", ONIGENC_CTYPE_XDIGIT, 6 }, + { (UChar* )"ascii", ONIGENC_CTYPE_ASCII, 5 }, + { (UChar* )"word", ONIGENC_CTYPE_WORD, 4 }, + { (UChar* )NULL, -1, 0 } + }; + + const PosixBracketEntryType *pb; + int not, i, r; + OnigCodePoint c; + OnigEncoding enc = env->enc; + UChar *p = *src; + PFETCH_READY; + + if (PPEEK_IS('^')) { + PINC; + not = 1; + } + else + not = 0; + + if (onigenc_strlen(enc, p, end) < POSIX_BRACKET_NAME_MIN_LEN + 3) + goto not_posix_bracket; + + for (pb = PBS; IS_NOT_NULL(pb->name); pb++) { + if (onigenc_with_ascii_strncmp(enc, p, end, pb->name, pb->len) == 0) { + p = (UChar* )onigenc_step(enc, p, end, pb->len); + if (onigenc_with_ascii_strncmp(enc, p, end, (UChar* )":]", 2) != 0) + return ONIGERR_INVALID_POSIX_BRACKET_TYPE; + + r = add_ctype_to_cc(cc, pb->ctype, not, env); + if (r != 0) return r; + + PINC; PINC; + *src = p; + return 0; + } + } + + not_posix_bracket: + c = 0; + i = 0; + while (!PEND && ((c = PPEEK) != ':') && c != ']') { + PINC; + if (++i > POSIX_BRACKET_CHECK_LIMIT_LENGTH) break; + } + if (c == ':' && ! PEND) { + PINC; + if (! PEND) { + PFETCH(c); + if (c == ']') + return ONIGERR_INVALID_POSIX_BRACKET_TYPE; + } + } + + return 1; /* 1: is not POSIX bracket, but no error. */ +} + +static int +fetch_char_property_to_ctype(UChar** src, UChar* end, ScanEnv* env) +{ + int r; + OnigCodePoint c; + OnigEncoding enc = env->enc; + UChar *prev, *start, *p = *src; + PFETCH_READY; + + r = 0; + start = prev = p; + + while (!PEND) { + prev = p; + PFETCH(c); + if (c == '}') { + r = ONIGENC_PROPERTY_NAME_TO_CTYPE(enc, start, prev); + if (r < 0) break; + + *src = p; + return r; + } + else if (c == '(' || c == ')' || c == '{' || c == '|') { + r = ONIGERR_INVALID_CHAR_PROPERTY_NAME; + break; + } + } + + onig_scan_env_set_error_string(env, r, *src, prev); + return r; +} + +static int +parse_char_property(Node** np, OnigToken* tok, UChar** src, UChar* end, + ScanEnv* env) +{ + int r, ctype; + CClassNode* cc; + + ctype = fetch_char_property_to_ctype(src, end, env); + if (ctype < 0) return ctype; + + *np = node_new_cclass(); + CHECK_NULL_RETURN_MEMERR(*np); + cc = NCCLASS(*np); + r = add_ctype_to_cc(cc, ctype, 0, env); + if (r != 0) return r; + if (tok->u.prop.not != 0) NCCLASS_SET_NOT(cc); + + return 0; +} + + +enum CCSTATE { + CCS_VALUE, + CCS_RANGE, + CCS_COMPLETE, + CCS_START +}; + +enum CCVALTYPE { + CCV_SB, + CCV_CODE_POINT, + CCV_CLASS +}; + +static int +next_state_class(CClassNode* cc, OnigCodePoint* vs, enum CCVALTYPE* type, + enum CCSTATE* state, ScanEnv* env) +{ + int r; + + if (*state == CCS_RANGE) + return ONIGERR_CHAR_CLASS_VALUE_AT_END_OF_RANGE; + + if (*state == CCS_VALUE && *type != CCV_CLASS) { + if (*type == CCV_SB) + BITSET_SET_BIT(cc->bs, (int )(*vs)); + else if (*type == CCV_CODE_POINT) { + r = add_code_range(&(cc->mbuf), env, *vs, *vs); + if (r < 0) return r; + } + } + + *state = CCS_VALUE; + *type = CCV_CLASS; + return 0; +} + +static int +next_state_val(CClassNode* cc, OnigCodePoint *vs, OnigCodePoint v, + int* vs_israw, int v_israw, + enum CCVALTYPE intype, enum CCVALTYPE* type, + enum CCSTATE* state, ScanEnv* env) +{ + int r; + + switch (*state) { + case CCS_VALUE: + if (*type == CCV_SB) + BITSET_SET_BIT(cc->bs, (int )(*vs)); + else if (*type == CCV_CODE_POINT) { + r = add_code_range(&(cc->mbuf), env, *vs, *vs); + if (r < 0) return r; + } + break; + + case CCS_RANGE: + if (intype == *type) { + if (intype == CCV_SB) { + if (*vs > 0xff || v > 0xff) + return ONIGERR_INVALID_CODE_POINT_VALUE; + + if (*vs > v) { + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) + goto ccs_range_end; + else + return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS; + } + bitset_set_range(cc->bs, (int )*vs, (int )v); + } + else { + r = add_code_range(&(cc->mbuf), env, *vs, v); + if (r < 0) return r; + } + } + else { +#if 0 + if (intype == CCV_CODE_POINT && *type == CCV_SB) { +#endif + if (*vs > v) { + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_EMPTY_RANGE_IN_CC)) + goto ccs_range_end; + else + return ONIGERR_EMPTY_RANGE_IN_CHAR_CLASS; + } + bitset_set_range(cc->bs, (int )*vs, (int )(v < 0xff ? v : 0xff)); + r = add_code_range(&(cc->mbuf), env, (OnigCodePoint )*vs, v); + if (r < 0) return r; +#if 0 + } + else + return ONIGERR_MISMATCH_CODE_LENGTH_IN_CLASS_RANGE; +#endif + } + ccs_range_end: + *state = CCS_COMPLETE; + break; + + case CCS_COMPLETE: + case CCS_START: + *state = CCS_VALUE; + break; + + default: + break; + } + + *vs_israw = v_israw; + *vs = v; + *type = intype; + return 0; +} + +static int +code_exist_check(OnigCodePoint c, UChar* from, UChar* end, int ignore_escaped, + ScanEnv* env) +{ + int in_esc; + OnigCodePoint code; + OnigEncoding enc = env->enc; + UChar* p = from; + PFETCH_READY; + + in_esc = 0; + while (! PEND) { + if (ignore_escaped && in_esc) { + in_esc = 0; + } + else { + PFETCH(code); + if (code == c) return 1; + if (code == MC_ESC(env->syntax)) in_esc = 1; + } + } + return 0; +} + +static int +parse_char_class(Node** np, OnigToken* tok, UChar** src, UChar* end, + ScanEnv* env) +{ + int r, neg, len, fetched, and_start; + OnigCodePoint v, vs; + UChar *p; + Node* node; + CClassNode *cc, *prev_cc; + CClassNode work_cc; + + enum CCSTATE state; + enum CCVALTYPE val_type, in_type; + int val_israw, in_israw; + + prev_cc = (CClassNode* )NULL; + *np = NULL_NODE; + r = fetch_token_in_cc(tok, src, end, env); + if (r == TK_CHAR && tok->u.c == '^' && tok->escaped == 0) { + neg = 1; + r = fetch_token_in_cc(tok, src, end, env); + } + else { + neg = 0; + } + + if (r < 0) return r; + if (r == TK_CC_CLOSE) { + if (! code_exist_check((OnigCodePoint )']', + *src, env->pattern_end, 1, env)) + return ONIGERR_EMPTY_CHAR_CLASS; + + CC_ESC_WARN(env, (UChar* )"]"); + r = tok->type = TK_CHAR; /* allow []...] */ + } + + *np = node = node_new_cclass(); + CHECK_NULL_RETURN_MEMERR(node); + cc = NCCLASS(node); + + and_start = 0; + state = CCS_START; + p = *src; + while (r != TK_CC_CLOSE) { + fetched = 0; + switch (r) { + case TK_CHAR: + len = ONIGENC_CODE_TO_MBCLEN(env->enc, tok->u.c); + if (len > 1) { + in_type = CCV_CODE_POINT; + } + else if (len < 0) { + r = len; + goto err; + } + else { + sb_char: + in_type = CCV_SB; + } + v = (OnigCodePoint )tok->u.c; + in_israw = 0; + goto val_entry2; + break; + + case TK_RAW_BYTE: + /* tok->base != 0 : octal or hexadec. */ + if (! ONIGENC_IS_SINGLEBYTE(env->enc) && tok->base != 0) { + UChar buf[ONIGENC_CODE_TO_MBC_MAXLEN]; + UChar* bufe = buf + ONIGENC_CODE_TO_MBC_MAXLEN; + UChar* psave = p; + int i, base = tok->base; + + buf[0] = tok->u.c; + for (i = 1; i < ONIGENC_MBC_MAXLEN(env->enc); i++) { + r = fetch_token_in_cc(tok, &p, end, env); + if (r < 0) goto err; + if (r != TK_RAW_BYTE || tok->base != base) { + fetched = 1; + break; + } + buf[i] = tok->u.c; + } + + if (i < ONIGENC_MBC_MINLEN(env->enc)) { + r = ONIGERR_TOO_SHORT_MULTI_BYTE_STRING; + goto err; + } + + len = enclen(env->enc, buf, buf+i); + if (i < len) { + r = ONIGERR_TOO_SHORT_MULTI_BYTE_STRING; + goto err; + } + else if (i > len) { /* fetch back */ + p = psave; + for (i = 1; i < len; i++) { + r = fetch_token_in_cc(tok, &p, end, env); + } + fetched = 0; + } + + if (i == 1) { + v = (OnigCodePoint )buf[0]; + goto raw_single; + } + else { + v = ONIGENC_MBC_TO_CODE(env->enc, buf, bufe); + in_type = CCV_CODE_POINT; + } + } + else { + v = (OnigCodePoint )tok->u.c; + raw_single: + in_type = CCV_SB; + } + in_israw = 1; + goto val_entry2; + break; + + case TK_CODE_POINT: + v = tok->u.code; + in_israw = 1; + val_entry: + len = ONIGENC_CODE_TO_MBCLEN(env->enc, v); + if (len < 0) { + r = len; + goto err; + } + in_type = (len == 1 ? CCV_SB : CCV_CODE_POINT); + val_entry2: + r = next_state_val(cc, &vs, v, &val_israw, in_israw, in_type, &val_type, + &state, env); + if (r != 0) goto err; + break; + + case TK_POSIX_BRACKET_OPEN: + r = parse_posix_bracket(cc, &p, end, env); + if (r < 0) goto err; + if (r == 1) { /* is not POSIX bracket */ + CC_ESC_WARN(env, (UChar* )"["); + p = tok->backp; + v = (OnigCodePoint )tok->u.c; + in_israw = 0; + goto val_entry; + } + goto next_class; + break; + + case TK_CHAR_TYPE: + r = add_ctype_to_cc(cc, tok->u.prop.ctype, tok->u.prop.not, env); + if (r != 0) return r; + + next_class: + r = next_state_class(cc, &vs, &val_type, &state, env); + if (r != 0) goto err; + break; + + case TK_CHAR_PROPERTY: + { + int ctype; + + ctype = fetch_char_property_to_ctype(&p, end, env); + if (ctype < 0) return ctype; + r = add_ctype_to_cc(cc, ctype, tok->u.prop.not, env); + if (r != 0) return r; + goto next_class; + } + break; + + case TK_CC_RANGE: + if (state == CCS_VALUE) { + r = fetch_token_in_cc(tok, &p, end, env); + if (r < 0) goto err; + fetched = 1; + if (r == TK_CC_CLOSE) { /* allow [x-] */ + range_end_val: + v = (OnigCodePoint )'-'; + in_israw = 0; + goto val_entry; + } + else if (r == TK_CC_AND) { + CC_ESC_WARN(env, (UChar* )"-"); + goto range_end_val; + } + state = CCS_RANGE; + } + else if (state == CCS_START) { + /* [-xa] is allowed */ + v = (OnigCodePoint )tok->u.c; + in_israw = 0; + + r = fetch_token_in_cc(tok, &p, end, env); + if (r < 0) goto err; + fetched = 1; + /* [--x] or [a&&-x] is warned. */ + if (r == TK_CC_RANGE || and_start != 0) + CC_ESC_WARN(env, (UChar* )"-"); + + goto val_entry; + } + else if (state == CCS_RANGE) { + CC_ESC_WARN(env, (UChar* )"-"); + goto sb_char; /* [!--x] is allowed */ + } + else { /* CCS_COMPLETE */ + r = fetch_token_in_cc(tok, &p, end, env); + if (r < 0) goto err; + fetched = 1; + if (r == TK_CC_CLOSE) goto range_end_val; /* allow [a-b-] */ + else if (r == TK_CC_AND) { + CC_ESC_WARN(env, (UChar* )"-"); + goto range_end_val; + } + + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_DOUBLE_RANGE_OP_IN_CC)) { + CC_ESC_WARN(env, (UChar* )"-"); + goto sb_char; /* [0-9-a] is allowed as [0-9\-a] */ + } + r = ONIGERR_UNMATCHED_RANGE_SPECIFIER_IN_CHAR_CLASS; + goto err; + } + break; + + case TK_CC_CC_OPEN: /* [ */ + { + Node *anode; + CClassNode* acc; + + r = parse_char_class(&anode, tok, &p, end, env); + if (r != 0) goto cc_open_err; + acc = NCCLASS(anode); + r = or_cclass(cc, acc, env->enc); + + onig_node_free(anode); + cc_open_err: + if (r != 0) goto err; + } + break; + + case TK_CC_AND: /* && */ + { + if (state == CCS_VALUE) { + r = next_state_val(cc, &vs, 0, &val_israw, 0, val_type, + &val_type, &state, env); + if (r != 0) goto err; + } + /* initialize local variables */ + and_start = 1; + state = CCS_START; + + if (IS_NOT_NULL(prev_cc)) { + r = and_cclass(prev_cc, cc, env->enc); + if (r != 0) goto err; + bbuf_free(cc->mbuf); + } + else { + prev_cc = cc; + cc = &work_cc; + } + initialize_cclass(cc); + } + break; + + case TK_EOT: + r = ONIGERR_PREMATURE_END_OF_CHAR_CLASS; + goto err; + break; + default: + r = ONIGERR_PARSER_BUG; + goto err; + break; + } + + if (fetched) + r = tok->type; + else { + r = fetch_token_in_cc(tok, &p, end, env); + if (r < 0) goto err; + } + } + + if (state == CCS_VALUE) { + r = next_state_val(cc, &vs, 0, &val_israw, 0, val_type, + &val_type, &state, env); + if (r != 0) goto err; + } + + if (IS_NOT_NULL(prev_cc)) { + r = and_cclass(prev_cc, cc, env->enc); + if (r != 0) goto err; + bbuf_free(cc->mbuf); + cc = prev_cc; + } + + if (neg != 0) + NCCLASS_SET_NOT(cc); + else + NCCLASS_CLEAR_NOT(cc); + if (IS_NCCLASS_NOT(cc) && + IS_SYNTAX_BV(env->syntax, ONIG_SYN_NOT_NEWLINE_IN_NEGATIVE_CC)) { + int is_empty; + + is_empty = (IS_NULL(cc->mbuf) ? 1 : 0); + if (is_empty != 0) + BITSET_IS_EMPTY(cc->bs, is_empty); + + if (is_empty == 0) { +#define NEWLINE_CODE 0x0a + + if (ONIGENC_IS_CODE_NEWLINE(env->enc, NEWLINE_CODE)) { + if (ONIGENC_CODE_TO_MBCLEN(env->enc, NEWLINE_CODE) == 1) + BITSET_SET_BIT(cc->bs, NEWLINE_CODE); + else + add_code_range(&(cc->mbuf), env, NEWLINE_CODE, NEWLINE_CODE); + } + } + } + *src = p; + return 0; + + err: + if (cc != NCCLASS(*np)) + bbuf_free(cc->mbuf); + onig_node_free(*np); + return r; +} + +static int parse_subexp(Node** top, OnigToken* tok, int term, + UChar** src, UChar* end, ScanEnv* env); + +static int +parse_enclose(Node** np, OnigToken* tok, int term, UChar** src, UChar* end, + ScanEnv* env) +{ + int r, num; + Node *target; + OnigOptionType option; + OnigCodePoint c; + OnigEncoding enc = env->enc; + +#ifdef USE_NAMED_GROUP + int list_capture; +#endif + + UChar* p = *src; + PFETCH_READY; + + *np = NULL; + if (PEND) return ONIGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS; + + option = env->option; + if (PPEEK_IS('?') && + IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_QMARK_GROUP_EFFECT)) { + PINC; + if (PEND) return ONIGERR_END_PATTERN_IN_GROUP; + + PFETCH(c); + switch (c) { + case ':': /* (?:...) grouping only */ + group: + r = fetch_token(tok, &p, end, env); + if (r < 0) return r; + r = parse_subexp(np, tok, term, &p, end, env); + if (r < 0) return r; + *src = p; + return 1; /* group */ + break; + + case '=': + *np = onig_node_new_anchor(ANCHOR_PREC_READ); + break; + case '!': /* preceding read */ + *np = onig_node_new_anchor(ANCHOR_PREC_READ_NOT); + break; + case '>': /* (?>...) stop backtrack */ + *np = node_new_enclose(ENCLOSE_STOP_BACKTRACK); + break; + +#ifdef USE_NAMED_GROUP + case '\'': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_QMARK_LT_NAMED_GROUP)) { + goto named_group1; + } + else + return ONIGERR_UNDEFINED_GROUP_OPTION; + break; +#endif + + case '<': /* look behind (?<=...), (?<!...) */ + PFETCH(c); + if (c == '=') + *np = onig_node_new_anchor(ANCHOR_LOOK_BEHIND); + else if (c == '!') + *np = onig_node_new_anchor(ANCHOR_LOOK_BEHIND_NOT); +#ifdef USE_NAMED_GROUP + else { + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_QMARK_LT_NAMED_GROUP)) { + UChar *name; + UChar *name_end; + + PUNFETCH; + c = '<'; + + named_group1: + list_capture = 0; + + named_group2: + name = p; + r = fetch_name((OnigCodePoint )c, &p, end, &name_end, env, &num, 0); + if (r < 0) return r; + + num = scan_env_add_mem_entry(env); + if (num < 0) return num; + if (list_capture != 0 && num >= (int )BIT_STATUS_BITS_NUM) + return ONIGERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY; + + r = name_add(env->reg, name, name_end, num, env); + if (r != 0) return r; + *np = node_new_enclose_memory(env->option, 1); + CHECK_NULL_RETURN_MEMERR(*np); + NENCLOSE(*np)->regnum = num; + if (list_capture != 0) + BIT_STATUS_ON_AT_SIMPLE(env->capture_history, num); + env->num_named++; + } + else { + return ONIGERR_UNDEFINED_GROUP_OPTION; + } + } +#else + else { + return ONIGERR_UNDEFINED_GROUP_OPTION; + } +#endif + break; + + case '@': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_ATMARK_CAPTURE_HISTORY)) { +#ifdef USE_NAMED_GROUP + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_QMARK_LT_NAMED_GROUP)) { + PFETCH(c); + if (c == '<' || c == '\'') { + list_capture = 1; + goto named_group2; /* (?@<name>...) */ + } + PUNFETCH; + } +#endif + *np = node_new_enclose_memory(env->option, 0); + CHECK_NULL_RETURN_MEMERR(*np); + num = scan_env_add_mem_entry(env); + if (num < 0) { + onig_node_free(*np); + return num; + } + else if (num >= (int )BIT_STATUS_BITS_NUM) { + onig_node_free(*np); + return ONIGERR_GROUP_NUMBER_OVER_FOR_CAPTURE_HISTORY; + } + NENCLOSE(*np)->regnum = num; + BIT_STATUS_ON_AT_SIMPLE(env->capture_history, num); + } + else { + return ONIGERR_UNDEFINED_GROUP_OPTION; + } + break; + +#ifdef USE_POSIXLINE_OPTION + case 'p': +#endif + case '-': case 'i': case 'm': case 's': case 'x': + { + int neg = 0; + + while (1) { + switch (c) { + case ':': + case ')': + break; + + case '-': neg = 1; break; + case 'x': ONOFF(option, ONIG_OPTION_EXTEND, neg); break; + case 'i': ONOFF(option, ONIG_OPTION_IGNORECASE, neg); break; + case 's': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_OPTION_PERL)) { + ONOFF(option, ONIG_OPTION_MULTILINE, neg); + } + else + return ONIGERR_UNDEFINED_GROUP_OPTION; + break; + + case 'm': + if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_OPTION_PERL)) { + ONOFF(option, ONIG_OPTION_SINGLELINE, (neg == 0 ? 1 : 0)); + } + else if (IS_SYNTAX_OP2(env->syntax, ONIG_SYN_OP2_OPTION_RUBY)) { + ONOFF(option, ONIG_OPTION_MULTILINE, neg); + } + else + return ONIGERR_UNDEFINED_GROUP_OPTION; + break; +#ifdef USE_POSIXLINE_OPTION + case 'p': + ONOFF(option, ONIG_OPTION_MULTILINE|ONIG_OPTION_SINGLELINE, neg); + break; +#endif + default: + return ONIGERR_UNDEFINED_GROUP_OPTION; + } + + if (c == ')') { + *np = node_new_option(option); + CHECK_NULL_RETURN_MEMERR(*np); + *src = p; + return 2; /* option only */ + } + else if (c == ':') { + OnigOptionType prev = env->option; + + env->option = option; + r = fetch_token(tok, &p, end, env); + if (r < 0) return r; + r = parse_subexp(&target, tok, term, &p, end, env); + env->option = prev; + if (r < 0) return r; + *np = node_new_option(option); + CHECK_NULL_RETURN_MEMERR(*np); + NENCLOSE(*np)->target = target; + *src = p; + return 0; + } + + if (PEND) return ONIGERR_END_PATTERN_IN_GROUP; + PFETCH(c); + } + } + break; + + default: + return ONIGERR_UNDEFINED_GROUP_OPTION; + } + } + else { + if (ONIG_IS_OPTION_ON(env->option, ONIG_OPTION_DONT_CAPTURE_GROUP)) + goto group; + + *np = node_new_enclose_memory(env->option, 0); + CHECK_NULL_RETURN_MEMERR(*np); + num = scan_env_add_mem_entry(env); + if (num < 0) return num; + NENCLOSE(*np)->regnum = num; + } + + CHECK_NULL_RETURN_MEMERR(*np); + r = fetch_token(tok, &p, end, env); + if (r < 0) return r; + r = parse_subexp(&target, tok, term, &p, end, env); + if (r < 0) return r; + + if (NTYPE(*np) == NT_ANCHOR) + NANCHOR(*np)->target = target; + else { + NENCLOSE(*np)->target = target; + if (NENCLOSE(*np)->type == ENCLOSE_MEMORY) { + /* Don't move this to previous of parse_subexp() */ + r = scan_env_set_mem_node(env, NENCLOSE(*np)->regnum, *np); + if (r != 0) return r; + } + } + + *src = p; + return 0; +} + +static const char* const PopularQStr[] = { + "?", "*", "+", "??", "*?", "+?" +}; + +static const char* const ReduceQStr[] = { + "", "", "*", "*?", "??", "+ and ??", "+? and ?" +}; + +static int +set_quantifier(Node* qnode, Node* target, int group, ScanEnv* env) +{ + QtfrNode* qn; + + qn = NQTFR(qnode); + if (qn->lower == 1 && qn->upper == 1) { + return 1; + } + + switch (NTYPE(target)) { + case NT_STR: + if (! group) { + StrNode* sn = NSTR(target); + if (str_node_can_be_split(sn, env->enc)) { + Node* n = str_node_split_last_char(sn, env->enc); + if (IS_NOT_NULL(n)) { + qn->target = n; + return 2; + } + } + } + break; + + case NT_QTFR: + { /* check redundant double repeat. */ + /* verbose warn (?:.?)? etc... but not warn (.?)? etc... */ + QtfrNode* qnt = NQTFR(target); + int nestq_num = popular_quantifier_num(qn); + int targetq_num = popular_quantifier_num(qnt); + +#ifdef USE_WARNING_REDUNDANT_NESTED_REPEAT_OPERATOR + if (!IS_QUANTIFIER_BY_NUMBER(qn) && !IS_QUANTIFIER_BY_NUMBER(qnt) && + IS_SYNTAX_BV(env->syntax, ONIG_SYN_WARN_REDUNDANT_NESTED_REPEAT)) { + UChar buf[WARN_BUFSIZE]; + + switch(ReduceTypeTable[targetq_num][nestq_num]) { + case RQ_ASIS: + break; + + case RQ_DEL: + if (onig_verb_warn != onig_null_warn) { + onig_snprintf_with_pattern(buf, WARN_BUFSIZE, env->enc, + env->pattern, env->pattern_end, + (UChar* )"redundant nested repeat operator"); + (*onig_verb_warn)((char* )buf); + } + goto warn_exit; + break; + + default: + if (onig_verb_warn != onig_null_warn) { + onig_snprintf_with_pattern(buf, WARN_BUFSIZE, env->enc, + env->pattern, env->pattern_end, + (UChar* )"nested repeat operator %s and %s was replaced with '%s'", + PopularQStr[targetq_num], PopularQStr[nestq_num], + ReduceQStr[ReduceTypeTable[targetq_num][nestq_num]]); + (*onig_verb_warn)((char* )buf); + } + goto warn_exit; + break; + } + } + + warn_exit: +#endif + if (targetq_num >= 0) { + if (nestq_num >= 0) { + onig_reduce_nested_quantifier(qnode, target); + goto q_exit; + } + else if (targetq_num == 1 || targetq_num == 2) { /* * or + */ + /* (?:a*){n,m}, (?:a+){n,m} => (?:a*){n,n}, (?:a+){n,n} */ + if (! IS_REPEAT_INFINITE(qn->upper) && qn->upper > 1 && qn->greedy) { + qn->upper = (qn->lower == 0 ? 1 : qn->lower); + } + } + } + } + break; + + default: + break; + } + + qn->target = target; + q_exit: + return 0; +} + + +#ifdef USE_SHARED_CCLASS_TABLE + +#define THRESHOLD_RANGE_NUM_FOR_SHARE_CCLASS 8 + +/* for ctype node hash table */ + +typedef struct { + OnigEncoding enc; + int not; + int type; +} type_cclass_key; + +static int type_cclass_cmp(type_cclass_key* x, type_cclass_key* y) +{ + if (x->type != y->type) return 1; + if (x->enc != y->enc) return 1; + if (x->not != y->not) return 1; + return 0; +} + +static int type_cclass_hash(type_cclass_key* key) +{ + int i, val; + UChar *p; + + val = 0; + + p = (UChar* )&(key->enc); + for (i = 0; i < (int )sizeof(key->enc); i++) { + val = val * 997 + (int )*p++; + } + + p = (UChar* )(&key->type); + for (i = 0; i < (int )sizeof(key->type); i++) { + val = val * 997 + (int )*p++; + } + + val += key->not; + return val + (val >> 5); +} + +static const struct st_hash_type type_type_cclass_hash = { + type_cclass_cmp, + type_cclass_hash, +}; + +static st_table* OnigTypeCClassTable; + + +static int +i_free_shared_class(type_cclass_key* key, Node* node, void* arg ARG_UNUSED) +{ + if (IS_NOT_NULL(node)) { + CClassNode* cc = NCCLASS(node); + if (IS_NOT_NULL(cc->mbuf)) xfree(cc->mbuf); + xfree(node); + } + + if (IS_NOT_NULL(key)) xfree(key); + return ST_DELETE; +} + +extern int +onig_free_shared_cclass_table(void) +{ + THREAD_ATOMIC_START; + if (IS_NOT_NULL(OnigTypeCClassTable)) { + onig_st_foreach(OnigTypeCClassTable, i_free_shared_class, 0); + onig_st_free_table(OnigTypeCClassTable); + OnigTypeCClassTable = NULL; + } + THREAD_ATOMIC_END; + + return 0; +} + +#endif /* USE_SHARED_CCLASS_TABLE */ + + +#ifndef CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS +static int +clear_not_flag_cclass(CClassNode* cc, OnigEncoding enc) +{ + BBuf *tbuf; + int r; + + if (IS_NCCLASS_NOT(cc)) { + bitset_invert(cc->bs); + + if (! ONIGENC_IS_SINGLEBYTE(enc)) { + r = not_code_range_buf(enc, cc->mbuf, &tbuf); + if (r != 0) return r; + + bbuf_free(cc->mbuf); + cc->mbuf = tbuf; + } + + NCCLASS_CLEAR_NOT(cc); + } + + return 0; +} +#endif /* CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS */ + +typedef struct { + ScanEnv* env; + CClassNode* cc; + Node* alt_root; + Node** ptail; +} IApplyCaseFoldArg; + +static int +i_apply_case_fold(OnigCodePoint from, OnigCodePoint to[], + int to_len, void* arg) +{ + IApplyCaseFoldArg* iarg; + ScanEnv* env; + CClassNode* cc; + BitSetRef bs; + + iarg = (IApplyCaseFoldArg* )arg; + env = iarg->env; + cc = iarg->cc; + bs = cc->bs; + + if (to_len == 1) { + int is_in = onig_is_code_in_cc(env->enc, from, cc); +#ifdef CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS + if ((is_in != 0 && !IS_NCCLASS_NOT(cc)) || + (is_in == 0 && IS_NCCLASS_NOT(cc))) { + if (ONIGENC_MBC_MINLEN(env->enc) > 1 || *to >= SINGLE_BYTE_SIZE) { + add_code_range(&(cc->mbuf), env, *to, *to); + } + else { + BITSET_SET_BIT(bs, *to); + } + } +#else + if (is_in != 0) { + if (ONIGENC_MBC_MINLEN(env->enc) > 1 || *to >= SINGLE_BYTE_SIZE) { + if (IS_NCCLASS_NOT(cc)) clear_not_flag_cclass(cc, env->enc); + add_code_range(&(cc->mbuf), env, *to, *to); + } + else { + if (IS_NCCLASS_NOT(cc)) { + BITSET_CLEAR_BIT(bs, *to); + } + else + BITSET_SET_BIT(bs, *to); + } + } +#endif /* CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS */ + } + else { + int r, i, len; + UChar buf[ONIGENC_CODE_TO_MBC_MAXLEN]; + Node *snode = NULL_NODE; + + if (onig_is_code_in_cc(env->enc, from, cc) +#ifdef CASE_FOLD_IS_APPLIED_INSIDE_NEGATIVE_CCLASS + && !IS_NCCLASS_NOT(cc) +#endif + ) { + for (i = 0; i < to_len; i++) { + len = ONIGENC_CODE_TO_MBC(env->enc, to[i], buf); + if (i == 0) { + snode = onig_node_new_str(buf, buf + len); + CHECK_NULL_RETURN_MEMERR(snode); + + /* char-class expanded multi-char only + compare with string folded at match time. */ + NSTRING_SET_AMBIG(snode); + } + else { + r = onig_node_str_cat(snode, buf, buf + len); + if (r < 0) { + onig_node_free(snode); + return r; + } + } + } + + *(iarg->ptail) = onig_node_new_alt(snode, NULL_NODE); + CHECK_NULL_RETURN_MEMERR(*(iarg->ptail)); + iarg->ptail = &(NCDR((*(iarg->ptail)))); + } + } + + return 0; +} + +static int +parse_exp(Node** np, OnigToken* tok, int term, + UChar** src, UChar* end, ScanEnv* env) +{ + int r, len, group = 0; + Node* qn; + Node** targetp; + + *np = NULL; + if (tok->type == (enum TokenSyms )term) + goto end_of_token; + + switch (tok->type) { + case TK_ALT: + case TK_EOT: + end_of_token: + *np = node_new_empty(); + return tok->type; + break; + + case TK_SUBEXP_OPEN: + r = parse_enclose(np, tok, TK_SUBEXP_CLOSE, src, end, env); + if (r < 0) return r; + if (r == 1) group = 1; + else if (r == 2) { /* option only */ + Node* target; + OnigOptionType prev = env->option; + + env->option = NENCLOSE(*np)->option; + r = fetch_token(tok, src, end, env); + if (r < 0) return r; + r = parse_subexp(&target, tok, term, src, end, env); + env->option = prev; + if (r < 0) return r; + NENCLOSE(*np)->target = target; + return tok->type; + } + break; + + case TK_SUBEXP_CLOSE: + if (! IS_SYNTAX_BV(env->syntax, ONIG_SYN_ALLOW_UNMATCHED_CLOSE_SUBEXP)) + return ONIGERR_UNMATCHED_CLOSE_PARENTHESIS; + + if (tok->escaped) goto tk_raw_byte; + else goto tk_byte; + break; + + case TK_STRING: + tk_byte: + { + *np = node_new_str(tok->backp, *src); + CHECK_NULL_RETURN_MEMERR(*np); + + while (1) { + r = fetch_token(tok, src, end, env); + if (r < 0) return r; + if (r != TK_STRING) break; + + r = onig_node_str_cat(*np, tok->backp, *src); + if (r < 0) return r; + } + + string_end: + targetp = np; + goto repeat; + } + break; + + case TK_RAW_BYTE: + tk_raw_byte: + { + *np = node_new_str_raw_char((UChar )tok->u.c); + CHECK_NULL_RETURN_MEMERR(*np); + len = 1; + while (1) { + if (len >= ONIGENC_MBC_MINLEN(env->enc)) { + if (len == enclen(env->enc, NSTR(*np)->s, NSTR(*np)->end)) { + r = fetch_token(tok, src, end, env); + NSTRING_CLEAR_RAW(*np); + goto string_end; + } + } + + r = fetch_token(tok, src, end, env); + if (r < 0) return r; + if (r != TK_RAW_BYTE) { + /* Don't use this, it is wrong for little endian encodings. */ +#ifdef USE_PAD_TO_SHORT_BYTE_CHAR + int rem; + if (len < ONIGENC_MBC_MINLEN(env->enc)) { + rem = ONIGENC_MBC_MINLEN(env->enc) - len; + (void )node_str_head_pad(NSTR(*np), rem, (UChar )0); + if (len + rem == enclen(env->enc, NSTR(*np)->s)) { + NSTRING_CLEAR_RAW(*np); + goto string_end; + } + } +#endif + return ONIGERR_TOO_SHORT_MULTI_BYTE_STRING; + } + + r = node_str_cat_char(*np, (UChar )tok->u.c); + if (r < 0) return r; + + len++; + } + } + break; + + case TK_CODE_POINT: + { + UChar buf[ONIGENC_CODE_TO_MBC_MAXLEN]; + int num = ONIGENC_CODE_TO_MBC(env->enc, tok->u.code, buf); + if (num < 0) return num; +#ifdef NUMBERED_CHAR_IS_NOT_CASE_AMBIG + *np = node_new_str_raw(buf, buf + num); +#else + *np = node_new_str(buf, buf + num); +#endif + CHECK_NULL_RETURN_MEMERR(*np); + } + break; + + case TK_QUOTE_OPEN: + { + OnigCodePoint end_op[2]; + UChar *qstart, *qend, *nextp; + + end_op[0] = (OnigCodePoint )MC_ESC(env->syntax); + end_op[1] = (OnigCodePoint )'E'; + qstart = *src; + qend = find_str_position(end_op, 2, qstart, end, &nextp, env->enc); + if (IS_NULL(qend)) { + nextp = qend = end; + } + *np = node_new_str(qstart, qend); + CHECK_NULL_RETURN_MEMERR(*np); + *src = nextp; + } + break; + + case TK_CHAR_TYPE: + { + switch (tok->u.prop.ctype) { + case ONIGENC_CTYPE_WORD: + *np = node_new_ctype(tok->u.prop.ctype, tok->u.prop.not); + CHECK_NULL_RETURN_MEMERR(*np); + break; + + case ONIGENC_CTYPE_SPACE: + case ONIGENC_CTYPE_DIGIT: + case ONIGENC_CTYPE_XDIGIT: + { + CClassNode* cc; + +#ifdef USE_SHARED_CCLASS_TABLE + const OnigCodePoint *mbr; + OnigCodePoint sb_out; + + r = ONIGENC_GET_CTYPE_CODE_RANGE(env->enc, tok->u.prop.ctype, + &sb_out, &mbr); + if (r == 0 && + ONIGENC_CODE_RANGE_NUM(mbr) + >= THRESHOLD_RANGE_NUM_FOR_SHARE_CCLASS) { + type_cclass_key key; + type_cclass_key* new_key; + + key.enc = env->enc; + key.not = tok->u.prop.not; + key.type = tok->u.prop.ctype; + + THREAD_ATOMIC_START; + + if (IS_NULL(OnigTypeCClassTable)) { + OnigTypeCClassTable + = onig_st_init_table_with_size(&type_type_cclass_hash, 10); + if (IS_NULL(OnigTypeCClassTable)) { + THREAD_ATOMIC_END; + return ONIGERR_MEMORY; + } + } + else { + if (onig_st_lookup(OnigTypeCClassTable, (st_data_t )&key, + (st_data_t* )np)) { + THREAD_ATOMIC_END; + break; + } + } + + *np = node_new_cclass_by_codepoint_range(tok->u.prop.not, + sb_out, mbr); + if (IS_NULL(*np)) { + THREAD_ATOMIC_END; + return ONIGERR_MEMORY; + } + + cc = NCCLASS(*np); + NCCLASS_SET_SHARE(cc); + new_key = (type_cclass_key* )xmalloc(sizeof(type_cclass_key)); + xmemcpy(new_key, &key, sizeof(type_cclass_key)); + onig_st_add_direct(OnigTypeCClassTable, (st_data_t )new_key, + (st_data_t )*np); + + THREAD_ATOMIC_END; + } + else { +#endif + *np = node_new_cclass(); + CHECK_NULL_RETURN_MEMERR(*np); + cc = NCCLASS(*np); + add_ctype_to_cc(cc, tok->u.prop.ctype, 0, env); + if (tok->u.prop.not != 0) NCCLASS_SET_NOT(cc); +#ifdef USE_SHARED_CCLASS_TABLE + } +#endif + } + break; + + default: + return ONIGERR_PARSER_BUG; + break; + } + } + break; + + case TK_CHAR_PROPERTY: + r = parse_char_property(np, tok, src, end, env); + if (r != 0) return r; + break; + + case TK_CC_OPEN: + { + CClassNode* cc; + + r = parse_char_class(np, tok, src, end, env); + if (r != 0) return r; + + cc = NCCLASS(*np); + if (IS_IGNORECASE(env->option)) { + IApplyCaseFoldArg iarg; + + iarg.env = env; + iarg.cc = cc; + iarg.alt_root = NULL_NODE; + iarg.ptail = &(iarg.alt_root); + + r = ONIGENC_APPLY_ALL_CASE_FOLD(env->enc, env->case_fold_flag, + i_apply_case_fold, &iarg); + if (r != 0) { + onig_node_free(iarg.alt_root); + return r; + } + if (IS_NOT_NULL(iarg.alt_root)) { + Node* work = onig_node_new_alt(*np, iarg.alt_root); + if (IS_NULL(work)) { + onig_node_free(iarg.alt_root); + return ONIGERR_MEMORY; + } + *np = work; + } + } + } + break; + + case TK_ANYCHAR: + *np = node_new_anychar(); + CHECK_NULL_RETURN_MEMERR(*np); + break; + + case TK_ANYCHAR_ANYTIME: + *np = node_new_anychar(); + CHECK_NULL_RETURN_MEMERR(*np); + qn = node_new_quantifier(0, REPEAT_INFINITE, 0); + CHECK_NULL_RETURN_MEMERR(qn); + NQTFR(qn)->target = *np; + *np = qn; + break; + + case TK_BACKREF: + len = tok->u.backref.num; + *np = node_new_backref(len, + (len > 1 ? tok->u.backref.refs : &(tok->u.backref.ref1)), + tok->u.backref.by_name, +#ifdef USE_BACKREF_WITH_LEVEL + tok->u.backref.exist_level, + tok->u.backref.level, +#endif + env); + CHECK_NULL_RETURN_MEMERR(*np); + break; + +#ifdef USE_SUBEXP_CALL + case TK_CALL: + { + int gnum = tok->u.call.gnum; + + if (gnum < 0) { + gnum = BACKREF_REL_TO_ABS(gnum, env); + if (gnum <= 0) + return ONIGERR_INVALID_BACKREF; + } + *np = node_new_call(tok->u.call.name, tok->u.call.name_end, gnum); + CHECK_NULL_RETURN_MEMERR(*np); + env->num_call++; + } + break; +#endif + + case TK_ANCHOR: + *np = onig_node_new_anchor(tok->u.anchor); + break; + + case TK_OP_REPEAT: + case TK_INTERVAL: + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_CONTEXT_INDEP_REPEAT_OPS)) { + if (IS_SYNTAX_BV(env->syntax, ONIG_SYN_CONTEXT_INVALID_REPEAT_OPS)) + return ONIGERR_TARGET_OF_REPEAT_OPERATOR_NOT_SPECIFIED; + else + *np = node_new_empty(); + } + else { + goto tk_byte; + } + break; + + default: + return ONIGERR_PARSER_BUG; + break; + } + + { + targetp = np; + + re_entry: + r = fetch_token(tok, src, end, env); + if (r < 0) return r; + + repeat: + if (r == TK_OP_REPEAT || r == TK_INTERVAL) { + if (is_invalid_quantifier_target(*targetp)) + return ONIGERR_TARGET_OF_REPEAT_OPERATOR_INVALID; + + qn = node_new_quantifier(tok->u.repeat.lower, tok->u.repeat.upper, + (r == TK_INTERVAL ? 1 : 0)); + CHECK_NULL_RETURN_MEMERR(qn); + NQTFR(qn)->greedy = tok->u.repeat.greedy; + r = set_quantifier(qn, *targetp, group, env); + if (r < 0) return r; + + if (tok->u.repeat.possessive != 0) { + Node* en; + en = node_new_enclose(ENCLOSE_STOP_BACKTRACK); + CHECK_NULL_RETURN_MEMERR(en); + NENCLOSE(en)->target = qn; + qn = en; + } + + if (r == 0) { + *targetp = qn; + } + else if (r == 1) { + onig_node_free(qn); + } + else if (r == 2) { /* split case: /abc+/ */ + Node *tmp; + + *targetp = node_new_list(*targetp, NULL); + CHECK_NULL_RETURN_MEMERR(*targetp); + tmp = NCDR(*targetp) = node_new_list(qn, NULL); + CHECK_NULL_RETURN_MEMERR(tmp); + targetp = &(NCAR(tmp)); + } + goto re_entry; + } + } + + return r; +} + +static int +parse_branch(Node** top, OnigToken* tok, int term, + UChar** src, UChar* end, ScanEnv* env) +{ + int r; + Node *node, **headp; + + *top = NULL; + r = parse_exp(&node, tok, term, src, end, env); + if (r < 0) return r; + + if (r == TK_EOT || r == term || r == TK_ALT) { + *top = node; + } + else { + *top = node_new_list(node, NULL); + headp = &(NCDR(*top)); + while (r != TK_EOT && r != term && r != TK_ALT) { + r = parse_exp(&node, tok, term, src, end, env); + if (r < 0) return r; + + if (NTYPE(node) == NT_LIST) { + *headp = node; + while (IS_NOT_NULL(NCDR(node))) node = NCDR(node); + headp = &(NCDR(node)); + } + else { + *headp = node_new_list(node, NULL); + headp = &(NCDR(*headp)); + } + } + } + + return r; +} + +/* term_tok: TK_EOT or TK_SUBEXP_CLOSE */ +static int +parse_subexp(Node** top, OnigToken* tok, int term, + UChar** src, UChar* end, ScanEnv* env) +{ + int r; + Node *node, **headp; + + *top = NULL; + r = parse_branch(&node, tok, term, src, end, env); + if (r < 0) { + onig_node_free(node); + return r; + } + + if (r == term) { + *top = node; + } + else if (r == TK_ALT) { + *top = onig_node_new_alt(node, NULL); + headp = &(NCDR(*top)); + while (r == TK_ALT) { + r = fetch_token(tok, src, end, env); + if (r < 0) return r; + r = parse_branch(&node, tok, term, src, end, env); + if (r < 0) return r; + + *headp = onig_node_new_alt(node, NULL); + headp = &(NCDR(*headp)); + } + + if (tok->type != (enum TokenSyms )term) + goto err; + } + else { + err: + if (term == TK_SUBEXP_CLOSE) + return ONIGERR_END_PATTERN_WITH_UNMATCHED_PARENTHESIS; + else + return ONIGERR_PARSER_BUG; + } + + return r; +} + +static int +parse_regexp(Node** top, UChar** src, UChar* end, ScanEnv* env) +{ + int r; + OnigToken tok; + + r = fetch_token(&tok, src, end, env); + if (r < 0) return r; + r = parse_subexp(top, &tok, TK_EOT, src, end, env); + if (r < 0) return r; + return 0; +} + +extern int +onig_parse_make_tree(Node** root, const UChar* pattern, const UChar* end, + regex_t* reg, ScanEnv* env) +{ + int r; + UChar* p; + +#ifdef USE_NAMED_GROUP + names_clear(reg); +#endif + + scan_env_clear(env); + env->option = reg->options; + env->case_fold_flag = reg->case_fold_flag; + env->enc = reg->enc; + env->syntax = reg->syntax; + env->pattern = (UChar* )pattern; + env->pattern_end = (UChar* )end; + env->reg = reg; + + *root = NULL; + p = (UChar* )pattern; + r = parse_regexp(root, &p, (UChar* )end, env); + reg->num_mem = env->num_mem; + return r; +} + +extern void +onig_scan_env_set_error_string(ScanEnv* env, int ecode ARG_UNUSED, + UChar* arg, UChar* arg_end) +{ + env->error = arg; + env->error_end = arg_end; +} |