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Diffstat (limited to 'libc/misc/regex/regcomp.c')
-rw-r--r--libc/misc/regex/regcomp.c158
1 files changed, 83 insertions, 75 deletions
diff --git a/libc/misc/regex/regcomp.c b/libc/misc/regex/regcomp.c
index 8aa152df9..bacba36c6 100644
--- a/libc/misc/regex/regcomp.c
+++ b/libc/misc/regex/regcomp.c
@@ -26,7 +26,7 @@ static void re_compile_fastmap_iter (regex_t *bufp,
static reg_errcode_t init_dfa (re_dfa_t *dfa, size_t pat_len);
#ifdef RE_ENABLE_I18N
static void free_charset (re_charset_t *cset);
-#endif /* RE_ENABLE_I18N */
+#endif
static void free_workarea_compile (regex_t *preg);
static reg_errcode_t create_initial_state (re_dfa_t *dfa);
#ifdef RE_ENABLE_I18N
@@ -211,10 +211,9 @@ static const uint16_t __re_error_msgid_idx[] =
are set in BUFP on entry. */
const char *
-re_compile_pattern (pattern, length, bufp)
- const char *pattern;
- size_t length;
- struct re_pattern_buffer *bufp;
+re_compile_pattern (const char *pattern,
+ size_t length,
+ struct re_pattern_buffer *bufp)
{
reg_errcode_t ret;
@@ -249,8 +248,7 @@ reg_syntax_t re_syntax_options;
defined in regex.h. We return the old syntax. */
reg_syntax_t
-re_set_syntax (syntax)
- reg_syntax_t syntax;
+re_set_syntax (reg_syntax_t syntax)
{
reg_syntax_t ret = re_syntax_options;
@@ -259,8 +257,7 @@ re_set_syntax (syntax)
}
int
-re_compile_fastmap (bufp)
- struct re_pattern_buffer *bufp;
+re_compile_fastmap (struct re_pattern_buffer *bufp)
{
re_dfa_t *dfa = (re_dfa_t *) bufp->buffer;
char *fastmap = bufp->fastmap;
@@ -388,7 +385,7 @@ re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
else if (type == OP_PERIOD
#ifdef RE_ENABLE_I18N
|| type == OP_UTF8_PERIOD
-#endif /* RE_ENABLE_I18N */
+#endif
|| type == END_OF_RE)
{
memset (fastmap, '\1', sizeof (char) * SBC_MAX);
@@ -436,10 +433,9 @@ re_compile_fastmap_iter (regex_t *bufp, const re_dfastate_t *init_state,
the return codes and their meanings.) */
int
-regcomp (preg, pattern, cflags)
- regex_t *__restrict preg;
- const char *__restrict pattern;
- int cflags;
+regcomp (regex_t *__restrict preg,
+ const char *__restrict pattern,
+ int cflags)
{
reg_errcode_t ret;
reg_syntax_t syntax = ((cflags & REG_EXTENDED) ? RE_SYNTAX_POSIX_EXTENDED
@@ -495,11 +491,10 @@ regcomp (preg, pattern, cflags)
from either regcomp or regexec. We don't use PREG here. */
size_t
-regerror (errcode, preg, errbuf, errbuf_size)
- int errcode;
- const regex_t *__restrict preg;
- char *__restrict errbuf;
- size_t errbuf_size;
+regerror (int errcode,
+ const regex_t *__restrict preg,
+ char *__restrict errbuf,
+ size_t errbuf_size)
{
const char *msg;
size_t msg_size;
@@ -596,8 +591,7 @@ free_dfa_content (re_dfa_t *dfa)
/* Free dynamically allocated space used by PREG. */
void
-regfree (preg)
- regex_t *preg;
+regfree (regex_t *preg)
{
re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
if (BE (dfa != NULL, 1))
@@ -619,7 +613,7 @@ libc_hidden_def(regfree)
#if defined _REGEX_RE_COMP || defined _LIBC || defined __UCLIBC__
/* BSD has one and only one pattern buffer. */
-static struct re_pattern_buffer re_comp_buf;
+static struct re_pattern_buffer *re_comp_buf;
char *
# if defined _LIBC || defined __UCLIBC__
@@ -628,47 +622,59 @@ char *
regcomp/regexec above without link errors. */
weak_function
# endif
-re_comp (s)
- const char *s;
+re_comp (const char *s)
{
reg_errcode_t ret;
- char *fastmap;
- if (!s)
+ /* "If re_comp() is passed NULL or a null string, it returns
+ * without changing the currently compiled regular expression." */
+ if (!s || !s[0])
{
- if (!re_comp_buf.buffer)
+ if (!re_comp_buf)
return gettext ("No previous regular expression");
- return 0;
+ return NULL;
+ }
+
+ if (!re_comp_buf)
+ {
+ re_comp_buf = calloc (1, sizeof(*re_comp_buf));
+ if (!re_comp_buf)
+ {
+ ret = REG_ESPACE;
+ goto err;
+ }
}
- if (re_comp_buf.buffer)
+ if (re_comp_buf->buffer)
{
- fastmap = re_comp_buf.fastmap;
- re_comp_buf.fastmap = NULL;
- regfree (&re_comp_buf);
- memset (&re_comp_buf, '\0', sizeof (re_comp_buf));
- re_comp_buf.fastmap = fastmap;
+ regfree (re_comp_buf);
+ memset (re_comp_buf, '\0', sizeof(*re_comp_buf));
}
- if (re_comp_buf.fastmap == NULL)
+ if (re_comp_buf->fastmap == NULL)
{
- re_comp_buf.fastmap = (char *) malloc (SBC_MAX);
- if (re_comp_buf.fastmap == NULL)
- return (char *) gettext (__re_error_msgid
- + __re_error_msgid_idx[(int) REG_ESPACE]);
+ re_comp_buf->fastmap = malloc (SBC_MAX);
+ if (re_comp_buf->fastmap == NULL)
+ {
+ ret = REG_ESPACE;
+ goto err;
+ }
}
/* Since `re_exec' always passes NULL for the `regs' argument, we
don't need to initialize the pattern buffer fields which affect it. */
/* Match anchors at newlines. */
- re_comp_buf.newline_anchor = 1;
+ re_comp_buf->newline_anchor = 1;
- ret = re_compile_internal (&re_comp_buf, s, strlen (s), re_syntax_options);
+ ret = re_compile_internal (re_comp_buf, s, strlen (s), re_syntax_options);
if (!ret)
return NULL;
+ free (re_comp_buf);
+ re_comp_buf = NULL;
+ err:
/* Yes, we're discarding `const' here if !HAVE_LIBINTL. */
return (char *) gettext (__re_error_msgid + __re_error_msgid_idx[(int) ret]);
}
@@ -676,7 +682,9 @@ re_comp (s)
#ifdef _LIBC
libc_freeres_fn (free_mem)
{
- regfree (&re_comp_buf);
+ regfree (re_comp_buf);
+ free (re_comp_buf);
+ re_comp_buf = NULL;
}
#endif
@@ -861,7 +869,7 @@ init_dfa (re_dfa_t *dfa, size_t pat_len)
{
int i, j, ch;
- dfa->sb_char = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+ dfa->sb_char = calloc (sizeof (bitset_t), 1);
if (BE (dfa->sb_char == NULL, 0))
return REG_ESPACE;
@@ -1955,7 +1963,7 @@ peek_token_bracket (re_token_t *token, re_string_t *input, reg_syntax_t syntax)
token->type = CHARACTER;
return 1;
}
-#endif /* RE_ENABLE_I18N */
+#endif
if (c == '\\' && (syntax & RE_BACKSLASH_ESCAPE_IN_LISTS)
&& re_string_cur_idx (input) + 1 < re_string_length (input))
@@ -2546,10 +2554,10 @@ internal_function
# ifdef RE_ENABLE_I18N
build_range_exp (bitset_t sbcset, re_charset_t *mbcset, int *range_alloc,
bracket_elem_t *start_elem, bracket_elem_t *end_elem)
-# else /* not RE_ENABLE_I18N */
+# else
build_range_exp (bitset_t sbcset, bracket_elem_t *start_elem,
bracket_elem_t *end_elem)
-# endif /* not RE_ENABLE_I18N */
+# endif
{
unsigned int start_ch, end_ch;
/* Equivalence Classes and Character Classes can't be a range start/end. */
@@ -2667,9 +2675,9 @@ internal_function
# ifdef RE_ENABLE_I18N
build_collating_symbol (bitset_t sbcset, re_charset_t *mbcset,
int *coll_sym_alloc, const unsigned char *name)
-# else /* not RE_ENABLE_I18N */
+# else
build_collating_symbol (bitset_t sbcset, const unsigned char *name)
-# endif /* not RE_ENABLE_I18N */
+# endif
{
size_t name_len = strlen ((const char *) name);
if (BE (name_len != 1, 0))
@@ -2958,7 +2966,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
re_charset_t *mbcset;
int coll_sym_alloc = 0, range_alloc = 0, mbchar_alloc = 0;
int equiv_class_alloc = 0, char_class_alloc = 0;
-#endif /* not RE_ENABLE_I18N */
+#endif
int non_match = 0;
bin_tree_t *work_tree;
int token_len;
@@ -2980,15 +2988,15 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
_NL_COLLATE_SYMB_EXTRAMB);
}
#endif
- sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+ sbcset = calloc (sizeof (bitset_t), 1);
#ifdef RE_ENABLE_I18N
- mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
-#endif /* RE_ENABLE_I18N */
+ mbcset = calloc (sizeof (re_charset_t), 1);
+#endif
#ifdef RE_ENABLE_I18N
if (BE (sbcset == NULL || mbcset == NULL, 0))
#else
if (BE (sbcset == NULL, 0))
-#endif /* RE_ENABLE_I18N */
+#endif
{
*err = REG_ESPACE;
return NULL;
@@ -3004,7 +3012,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
{
#ifdef RE_ENABLE_I18N
mbcset->non_match = 1;
-#endif /* not RE_ENABLE_I18N */
+#endif
non_match = 1;
if (syntax & RE_HAT_LISTS_NOT_NEWLINE)
bitset_set (sbcset, '\0');
@@ -3095,7 +3103,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
# else
*err = build_range_exp (sbcset, &start_elem, &end_elem);
# endif
-#endif /* RE_ENABLE_I18N */
+#endif
if (BE (*err != REG_NOERROR, 0))
goto parse_bracket_exp_free_return;
}
@@ -3129,7 +3137,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
*err = build_equiv_class (sbcset,
#ifdef RE_ENABLE_I18N
mbcset, &equiv_class_alloc,
-#endif /* RE_ENABLE_I18N */
+#endif
start_elem.opr.name);
if (BE (*err != REG_NOERROR, 0))
goto parse_bracket_exp_free_return;
@@ -3138,7 +3146,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
*err = build_collating_symbol (sbcset,
#ifdef RE_ENABLE_I18N
mbcset, &coll_sym_alloc,
-#endif /* RE_ENABLE_I18N */
+#endif
start_elem.opr.name);
if (BE (*err != REG_NOERROR, 0))
goto parse_bracket_exp_free_return;
@@ -3147,7 +3155,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
*err = build_charclass (regexp->trans, sbcset,
#ifdef RE_ENABLE_I18N
mbcset, &char_class_alloc,
-#endif /* RE_ENABLE_I18N */
+#endif
start_elem.opr.name, syntax);
if (BE (*err != REG_NOERROR, 0))
goto parse_bracket_exp_free_return;
@@ -3236,7 +3244,7 @@ parse_bracket_exp (re_string_t *regexp, re_dfa_t *dfa, re_token_t *token,
re_free (sbcset);
#ifdef RE_ENABLE_I18N
free_charset (mbcset);
-#endif /* RE_ENABLE_I18N */
+#endif
return NULL;
}
@@ -3333,9 +3341,9 @@ static reg_errcode_t
#ifdef RE_ENABLE_I18N
build_equiv_class (bitset_t sbcset, re_charset_t *mbcset,
int *equiv_class_alloc, const unsigned char *name)
-#else /* not RE_ENABLE_I18N */
+#else
build_equiv_class (bitset_t sbcset, const unsigned char *name)
-#endif /* not RE_ENABLE_I18N */
+#endif
{
#ifdef _LIBC
uint32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
@@ -3426,10 +3434,10 @@ static reg_errcode_t
build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
re_charset_t *mbcset, int *char_class_alloc,
const unsigned char *class_name, reg_syntax_t syntax)
-#else /* not RE_ENABLE_I18N */
+#else
build_charclass (RE_TRANSLATE_TYPE trans, bitset_t sbcset,
const unsigned char *class_name, reg_syntax_t syntax)
-#endif /* not RE_ENABLE_I18N */
+#endif
{
int i;
const char *name = (const char *) class_name;
@@ -3514,21 +3522,21 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
#ifdef RE_ENABLE_I18N
re_charset_t *mbcset;
int alloc = 0;
-#endif /* not RE_ENABLE_I18N */
+#endif
reg_errcode_t ret;
re_token_t br_token;
bin_tree_t *tree;
- sbcset = (re_bitset_ptr_t) calloc (sizeof (bitset_t), 1);
+ sbcset = calloc (sizeof (bitset_t), 1);
#ifdef RE_ENABLE_I18N
- mbcset = (re_charset_t *) calloc (sizeof (re_charset_t), 1);
-#endif /* RE_ENABLE_I18N */
+ mbcset = calloc (sizeof (re_charset_t), 1);
+#endif
#ifdef RE_ENABLE_I18N
if (BE (sbcset == NULL || mbcset == NULL, 0))
-#else /* not RE_ENABLE_I18N */
+#else
if (BE (sbcset == NULL, 0))
-#endif /* not RE_ENABLE_I18N */
+#endif
{
*err = REG_ESPACE;
return NULL;
@@ -3542,14 +3550,14 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
bitset_set(cset->sbcset, '\0');
*/
mbcset->non_match = 1;
-#endif /* not RE_ENABLE_I18N */
+#endif
}
/* We don't care the syntax in this case. */
ret = build_charclass (trans, sbcset,
#ifdef RE_ENABLE_I18N
mbcset, &alloc,
-#endif /* RE_ENABLE_I18N */
+#endif
class_name, 0);
if (BE (ret != REG_NOERROR, 0))
@@ -3557,7 +3565,7 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
re_free (sbcset);
#ifdef RE_ENABLE_I18N
free_charset (mbcset);
-#endif /* RE_ENABLE_I18N */
+#endif
*err = ret;
return NULL;
}
@@ -3605,13 +3613,13 @@ build_charclass_op (re_dfa_t *dfa, RE_TRANSLATE_TYPE trans,
}
#else /* not RE_ENABLE_I18N */
return tree;
-#endif /* not RE_ENABLE_I18N */
+#endif
build_word_op_espace:
re_free (sbcset);
#ifdef RE_ENABLE_I18N
free_charset (mbcset);
-#endif /* RE_ENABLE_I18N */
+#endif
*err = REG_ESPACE;
return NULL;
}
@@ -3726,7 +3734,7 @@ free_token (re_token_t *node)
if (node->type == COMPLEX_BRACKET && node->duplicated == 0)
free_charset (node->opr.mbcset);
else
-#endif /* RE_ENABLE_I18N */
+#endif
if (node->type == SIMPLE_BRACKET && node->duplicated == 0)
re_free (node->opr.sbcset);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 14:10:22 +0000