Commit 04d96eca authored by Michal Nazarewicz's avatar Michal Nazarewicz

Get rid of re_set_syntax

Instead of using a global variable for storing regex syntax, pass it
to re_compile_pattern.  This is only enabled when compiling Emacs (i.e.
‘#ifdef emacs’).

* src/regex.h (re_set_syntax): Declare only #ifndef emacs.
(re_compile_pattern): Now takes syntax argument #ifdef emacs.

* src/regex.c (re_syntax_options): Define only #ifndef emacs.
(re_compile_pattern): Use the new syntax argument #ifdef emacs.

* src/search.c (compile_pattern_1): Don’t use re_set_syntax and
instead pass syntax to re_compile_pattern directly.
parent 9a418e0f
......@@ -1149,6 +1149,8 @@ print_double_string (re_char *where, re_char *string1, ssize_t size1,
#endif /* not DEBUG */
#ifndef emacs
/* Set by `re_set_syntax' to the current regexp syntax to recognize. Can
also be assigned to arbitrarily: each pattern buffer stores its own
syntax, so it can be changed between regex compilations. */
......@@ -1174,6 +1176,8 @@ re_set_syntax (reg_syntax_t syntax)
}
WEAK_ALIAS (__re_set_syntax, re_set_syntax)
#endif
/* Regexp to use to replace spaces, or NULL meaning don't. */
static const_re_char *whitespace_regexp;
......@@ -6271,8 +6275,14 @@ bcmp_translate (const_re_char *s1, const_re_char *s2, register ssize_t len,
const char *
re_compile_pattern (const char *pattern, size_t length,
#ifdef emacs
reg_syntax_t syntax,
#endif
struct re_pattern_buffer *bufp)
{
#ifndef emacs
const reg_syntax_t syntax = re_syntax_options;
#endif
reg_errcode_t ret;
/* GNU code is written to assume at least RE_NREGS registers will be set
......@@ -6284,7 +6294,7 @@ re_compile_pattern (const char *pattern, size_t length,
setting no_sub. */
bufp->no_sub = 0;
ret = regex_compile ((re_char*) pattern, length, re_syntax_options, bufp);
ret = regex_compile ((re_char*) pattern, length, syntax, bufp);
if (!ret)
return NULL;
......
......@@ -20,6 +20,13 @@
#ifndef _REGEX_H
#define _REGEX_H 1
#if defined emacs && (defined _REGEX_RE_COMP || defined _LIBC)
/* We’re not defining re_set_syntax and using a different prototype of
re_compile_pattern when building Emacs so fail compilation early with
a (somewhat helpful) error message when conflict is detected. */
# error "_REGEX_RE_COMP nor _LIBC can be defined if emacs is defined."
#endif
/* Allow the use in C++ code. */
#ifdef __cplusplus
extern "C" {
......@@ -453,14 +460,21 @@ typedef struct
/* Declarations for routines. */
#ifndef emacs
/* Sets the current default syntax to SYNTAX, and return the old syntax.
You can also simply assign to the `re_syntax_options' variable. */
extern reg_syntax_t re_set_syntax (reg_syntax_t __syntax);
#endif
/* Compile the regular expression PATTERN, with length LENGTH
and syntax given by the global `re_syntax_options', into the buffer
BUFFER. Return NULL if successful, and an error string if not. */
extern const char *re_compile_pattern (const char *__pattern, size_t __length,
#ifdef emacs
reg_syntax_t syntax,
#endif
struct re_pattern_buffer *__buffer);
......
......@@ -113,8 +113,8 @@ static void
compile_pattern_1 (struct regexp_cache *cp, Lisp_Object pattern,
Lisp_Object translate, bool posix)
{
reg_syntax_t syntax;
char *val;
reg_syntax_t old;
cp->regexp = Qnil;
cp->buf.translate = (! NILP (translate) ? translate : make_number (0));
......@@ -131,16 +131,15 @@ compile_pattern_1 (struct regexp_cache *cp, Lisp_Object pattern,
Using BLOCK_INPUT here means the debugger won't run if an error occurs.
So let's turn it off. */
/* BLOCK_INPUT; */
old = re_set_syntax (RE_SYNTAX_EMACS
| (posix ? 0 : RE_NO_POSIX_BACKTRACKING));
if (STRINGP (Vsearch_spaces_regexp))
re_set_whitespace_regexp (SSDATA (Vsearch_spaces_regexp));
else
re_set_whitespace_regexp (NULL);
val = (char *) re_compile_pattern (SSDATA (pattern),
SBYTES (pattern), &cp->buf);
syntax = RE_SYNTAX_EMACS | (posix ? 0 : RE_NO_POSIX_BACKTRACKING);
val = (char *) re_compile_pattern (SSDATA (pattern), SBYTES (pattern),
syntax, &cp->buf);
/* If the compiled pattern hard codes some of the contents of the
syntax-table, it can only be reused with *this* syntax table. */
......@@ -148,7 +147,6 @@ compile_pattern_1 (struct regexp_cache *cp, Lisp_Object pattern,
re_set_whitespace_regexp (NULL);
re_set_syntax (old);
/* unblock_input (); */
if (val)
xsignal1 (Qinvalid_regexp, build_string (val));
......
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